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 crc = crc32_be(crc, pos - 2, elen + 2);
948 elem_parse_failed = true;
950 case WLAN_EID_OPMODE_NOTIF:
952 elems->opmode_notif = pos;
954 crc = crc32_be(crc, pos - 2, elen + 2);
957 elem_parse_failed = true;
959 case WLAN_EID_MESH_ID:
960 elems->mesh_id = pos;
961 elems->mesh_id_len = elen;
963 case WLAN_EID_MESH_CONFIG:
964 if (elen >= sizeof(struct ieee80211_meshconf_ie))
965 elems->mesh_config = (void *)pos;
967 elem_parse_failed = true;
969 case WLAN_EID_PEER_MGMT:
970 elems->peering = pos;
971 elems->peering_len = elen;
973 case WLAN_EID_MESH_AWAKE_WINDOW:
975 elems->awake_window = (void *)pos;
979 elems->preq_len = elen;
983 elems->prep_len = elen;
987 elems->perr_len = elen;
990 if (elen >= sizeof(struct ieee80211_rann_ie))
991 elems->rann = (void *)pos;
993 elem_parse_failed = true;
995 case WLAN_EID_CHANNEL_SWITCH:
996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997 elem_parse_failed = true;
1000 elems->ch_switch_ie = (void *)pos;
1002 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004 elem_parse_failed = true;
1007 elems->ext_chansw_ie = (void *)pos;
1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011 elem_parse_failed = true;
1014 elems->sec_chan_offs = (void *)pos;
1016 case WLAN_EID_CHAN_SWITCH_PARAM:
1018 sizeof(*elems->mesh_chansw_params_ie)) {
1019 elem_parse_failed = true;
1022 elems->mesh_chansw_params_ie = (void *)pos;
1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1026 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027 elem_parse_failed = true;
1030 elems->wide_bw_chansw_ie = (void *)pos;
1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1034 elem_parse_failed = true;
1038 * This is a bit tricky, but as we only care about
1039 * the wide bandwidth channel switch element, so
1040 * just parse it out manually.
1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046 elems->wide_bw_chansw_ie =
1049 elem_parse_failed = true;
1052 case WLAN_EID_COUNTRY:
1053 elems->country_elem = pos;
1054 elems->country_elem_len = elen;
1056 case WLAN_EID_PWR_CONSTRAINT:
1058 elem_parse_failed = true;
1061 elems->pwr_constr_elem = pos;
1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064 /* Lots of different options exist, but we only care
1065 * about the Dynamic Transmit Power Control element.
1066 * First check for the Cisco OUI, then for the DTPC
1070 elem_parse_failed = true;
1074 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075 pos[2] != 0x96 || pos[3] != 0x00)
1079 elem_parse_failed = true;
1084 crc = crc32_be(crc, pos - 2, elen + 2);
1086 elems->cisco_dtpc_elem = pos;
1088 case WLAN_EID_TIMEOUT_INTERVAL:
1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090 elems->timeout_int = (void *)pos;
1092 elem_parse_failed = true;
1098 if (elem_parse_failed)
1099 elems->parse_error = true;
1101 __set_bit(id, seen_elems);
1108 elems->parse_error = true;
1113 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1114 bool bss_notify, bool enable_qos)
1116 struct ieee80211_local *local = sdata->local;
1117 struct ieee80211_tx_queue_params qparam;
1118 struct ieee80211_chanctx_conf *chanctx_conf;
1121 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1124 if (!local->ops->conf_tx)
1127 if (local->hw.queues < IEEE80211_NUM_ACS)
1130 memset(&qparam, 0, sizeof(qparam));
1133 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1134 use_11b = (chanctx_conf &&
1135 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1136 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1139 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1141 /* Set defaults according to 802.11-2007 Table 7-37 */
1148 /* Confiure old 802.11b/g medium access rules. */
1149 qparam.cw_max = aCWmax;
1150 qparam.cw_min = aCWmin;
1154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1155 /* Update if QoS is enabled. */
1158 case IEEE80211_AC_BK:
1159 qparam.cw_max = aCWmax;
1160 qparam.cw_min = aCWmin;
1167 /* never happens but let's not leave undefined */
1169 case IEEE80211_AC_BE:
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1178 case IEEE80211_AC_VI:
1179 qparam.cw_max = aCWmin;
1180 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1184 qparam.txop = 6016/32;
1186 qparam.txop = 3008/32;
1193 case IEEE80211_AC_VO:
1194 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1195 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1199 qparam.txop = 3264/32;
1201 qparam.txop = 1504/32;
1207 qparam.uapsd = false;
1209 sdata->tx_conf[ac] = qparam;
1210 drv_conf_tx(local, sdata, ac, &qparam);
1213 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1214 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1215 sdata->vif.bss_conf.qos = enable_qos;
1217 ieee80211_bss_info_change_notify(sdata,
1222 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1223 u16 transaction, u16 auth_alg, u16 status,
1224 const u8 *extra, size_t extra_len, const u8 *da,
1225 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1228 struct ieee80211_local *local = sdata->local;
1229 struct sk_buff *skb;
1230 struct ieee80211_mgmt *mgmt;
1233 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1234 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1235 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1239 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1241 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1242 memset(mgmt, 0, 24 + 6);
1243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1244 IEEE80211_STYPE_AUTH);
1245 memcpy(mgmt->da, da, ETH_ALEN);
1246 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1247 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1248 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1249 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1250 mgmt->u.auth.status_code = cpu_to_le16(status);
1252 memcpy(skb_put(skb, extra_len), extra, extra_len);
1254 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1255 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1256 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1260 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1262 ieee80211_tx_skb(sdata, skb);
1265 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1266 const u8 *bssid, u16 stype, u16 reason,
1267 bool send_frame, u8 *frame_buf)
1269 struct ieee80211_local *local = sdata->local;
1270 struct sk_buff *skb;
1271 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1274 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1275 mgmt->duration = 0; /* initialize only */
1276 mgmt->seq_ctrl = 0; /* initialize only */
1277 memcpy(mgmt->da, bssid, ETH_ALEN);
1278 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1279 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1280 /* u.deauth.reason_code == u.disassoc.reason_code */
1281 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1284 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1285 IEEE80211_DEAUTH_FRAME_LEN);
1289 skb_reserve(skb, local->hw.extra_tx_headroom);
1292 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1293 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1295 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1296 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1297 IEEE80211_SKB_CB(skb)->flags |=
1298 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1300 ieee80211_tx_skb(sdata, skb);
1304 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1305 u8 *buffer, size_t buffer_len,
1306 const u8 *ie, size_t ie_len,
1307 enum ieee80211_band band,
1309 struct cfg80211_chan_def *chandef,
1312 struct ieee80211_supported_band *sband;
1313 u8 *pos = buffer, *end = buffer + buffer_len;
1315 int supp_rates_len, i;
1321 bool have_80mhz = false;
1325 sband = local->hw.wiphy->bands[band];
1326 if (WARN_ON_ONCE(!sband))
1329 rate_flags = ieee80211_chandef_rate_flags(chandef);
1330 shift = ieee80211_chandef_get_shift(chandef);
1333 for (i = 0; i < sband->n_bitrates; i++) {
1334 if ((BIT(i) & rate_mask) == 0)
1335 continue; /* skip rate */
1336 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1339 rates[num_rates++] =
1340 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1344 supp_rates_len = min_t(int, num_rates, 8);
1346 if (end - pos < 2 + supp_rates_len)
1348 *pos++ = WLAN_EID_SUPP_RATES;
1349 *pos++ = supp_rates_len;
1350 memcpy(pos, rates, supp_rates_len);
1351 pos += supp_rates_len;
1353 /* insert "request information" if in custom IEs */
1355 static const u8 before_extrates[] = {
1357 WLAN_EID_SUPP_RATES,
1360 noffset = ieee80211_ie_split(ie, ie_len,
1362 ARRAY_SIZE(before_extrates),
1364 if (end - pos < noffset - *offset)
1366 memcpy(pos, ie + *offset, noffset - *offset);
1367 pos += noffset - *offset;
1371 ext_rates_len = num_rates - supp_rates_len;
1372 if (ext_rates_len > 0) {
1373 if (end - pos < 2 + ext_rates_len)
1375 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1376 *pos++ = ext_rates_len;
1377 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1378 pos += ext_rates_len;
1381 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1384 *pos++ = WLAN_EID_DS_PARAMS;
1386 *pos++ = ieee80211_frequency_to_channel(
1387 chandef->chan->center_freq);
1390 /* insert custom IEs that go before HT */
1392 static const u8 before_ht[] = {
1394 WLAN_EID_SUPP_RATES,
1396 WLAN_EID_EXT_SUPP_RATES,
1398 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1400 noffset = ieee80211_ie_split(ie, ie_len,
1401 before_ht, ARRAY_SIZE(before_ht),
1403 if (end - pos < noffset - *offset)
1405 memcpy(pos, ie + *offset, noffset - *offset);
1406 pos += noffset - *offset;
1410 if (sband->ht_cap.ht_supported) {
1411 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1413 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1418 * If adding more here, adjust code in main.c
1419 * that calculates local->scan_ies_len.
1422 /* insert custom IEs that go before VHT */
1424 static const u8 before_vht[] = {
1426 WLAN_EID_SUPP_RATES,
1428 WLAN_EID_EXT_SUPP_RATES,
1430 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1431 WLAN_EID_HT_CAPABILITY,
1432 WLAN_EID_BSS_COEX_2040,
1433 WLAN_EID_EXT_CAPABILITY,
1435 WLAN_EID_CHANNEL_USAGE,
1436 WLAN_EID_INTERWORKING,
1437 /* mesh ID can't happen here */
1438 /* 60 GHz can't happen here right now */
1440 noffset = ieee80211_ie_split(ie, ie_len,
1441 before_vht, ARRAY_SIZE(before_vht),
1443 if (end - pos < noffset - *offset)
1445 memcpy(pos, ie + *offset, noffset - *offset);
1446 pos += noffset - *offset;
1450 /* Check if any channel in this sband supports at least 80 MHz */
1451 for (i = 0; i < sband->n_channels; i++) {
1452 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453 IEEE80211_CHAN_NO_80MHZ))
1460 if (sband->vht_cap.vht_supported && have_80mhz) {
1461 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1463 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464 sband->vht_cap.cap);
1467 return pos - buffer;
1469 WARN_ONCE(1, "not enough space for preq IEs\n");
1470 return pos - buffer;
1473 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1475 struct ieee80211_scan_ies *ie_desc,
1476 const u8 *ie, size_t ie_len,
1477 u8 bands_used, u32 *rate_masks,
1478 struct cfg80211_chan_def *chandef)
1480 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1483 memset(ie_desc, 0, sizeof(*ie_desc));
1485 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1486 if (bands_used & BIT(i)) {
1487 pos += ieee80211_build_preq_ies_band(local,
1494 ie_desc->ies[i] = buffer + old_pos;
1495 ie_desc->len[i] = pos - old_pos;
1500 /* add any remaining custom IEs */
1502 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503 "not enough space for preq custom IEs\n"))
1505 memcpy(buffer + pos, ie + custom_ie_offset,
1506 ie_len - custom_ie_offset);
1507 ie_desc->common_ies = buffer + pos;
1508 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509 pos += ie_len - custom_ie_offset;
1515 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1516 const u8 *src, const u8 *dst,
1518 struct ieee80211_channel *chan,
1519 const u8 *ssid, size_t ssid_len,
1520 const u8 *ie, size_t ie_len,
1523 struct ieee80211_local *local = sdata->local;
1524 struct cfg80211_chan_def chandef;
1525 struct sk_buff *skb;
1526 struct ieee80211_mgmt *mgmt;
1528 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1529 struct ieee80211_scan_ies dummy_ie_desc;
1532 * Do not send DS Channel parameter for directed probe requests
1533 * in order to maximize the chance that we get a response. Some
1534 * badly-behaved APs don't respond when this parameter is included.
1536 chandef.width = sdata->vif.bss_conf.chandef.width;
1538 chandef.chan = NULL;
1540 chandef.chan = chan;
1542 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1547 rate_masks[chan->band] = ratemask;
1548 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1549 skb_tailroom(skb), &dummy_ie_desc,
1550 ie, ie_len, BIT(chan->band),
1551 rate_masks, &chandef);
1552 skb_put(skb, ies_len);
1555 mgmt = (struct ieee80211_mgmt *) skb->data;
1556 memcpy(mgmt->da, dst, ETH_ALEN);
1557 memcpy(mgmt->bssid, dst, ETH_ALEN);
1560 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566 const u8 *src, const u8 *dst,
1567 const u8 *ssid, size_t ssid_len,
1568 const u8 *ie, size_t ie_len,
1569 u32 ratemask, bool directed, u32 tx_flags,
1570 struct ieee80211_channel *channel, bool scan)
1572 struct sk_buff *skb;
1574 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1576 ie, ie_len, directed);
1578 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1580 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1582 ieee80211_tx_skb(sdata, skb);
1586 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1587 struct ieee802_11_elems *elems,
1588 enum ieee80211_band band, u32 *basic_rates)
1590 struct ieee80211_supported_band *sband;
1592 u32 supp_rates, rate_flags;
1594 sband = sdata->local->hw.wiphy->bands[band];
1596 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1597 shift = ieee80211_vif_get_shift(&sdata->vif);
1599 if (WARN_ON(!sband))
1602 num_rates = sband->n_bitrates;
1604 for (i = 0; i < elems->supp_rates_len +
1605 elems->ext_supp_rates_len; i++) {
1609 if (i < elems->supp_rates_len)
1610 rate = elems->supp_rates[i];
1611 else if (elems->ext_supp_rates)
1612 rate = elems->ext_supp_rates
1613 [i - elems->supp_rates_len];
1614 own_rate = 5 * (rate & 0x7f);
1615 is_basic = !!(rate & 0x80);
1617 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1620 for (j = 0; j < num_rates; j++) {
1622 if ((rate_flags & sband->bitrates[j].flags)
1626 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1629 if (brate == own_rate) {
1630 supp_rates |= BIT(j);
1631 if (basic_rates && is_basic)
1632 *basic_rates |= BIT(j);
1639 void ieee80211_stop_device(struct ieee80211_local *local)
1641 ieee80211_led_radio(local, false);
1642 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1644 cancel_work_sync(&local->reconfig_filter);
1646 flush_workqueue(local->workqueue);
1650 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1653 /* It's possible that we don't handle the scan completion in
1654 * time during suspend, so if it's still marked as completed
1655 * here, queue the work and flush it to clean things up.
1656 * Instead of calling the worker function directly here, we
1657 * really queue it to avoid potential races with other flows
1658 * scheduling the same work.
1660 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1661 /* If coming from reconfiguration failure, abort the scan so
1662 * we don't attempt to continue a partial HW scan - which is
1663 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1664 * completed scan, and a 5 GHz portion is still pending.
1667 set_bit(SCAN_ABORTED, &local->scanning);
1668 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1669 flush_delayed_work(&local->scan_work);
1673 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1675 struct ieee80211_sub_if_data *sdata;
1676 struct ieee80211_chanctx *ctx;
1679 * We get here if during resume the device can't be restarted properly.
1680 * We might also get here if this happens during HW reset, which is a
1681 * slightly different situation and we need to drop all connections in
1684 * Ask cfg80211 to turn off all interfaces, this will result in more
1685 * warnings but at least we'll then get into a clean stopped state.
1688 local->resuming = false;
1689 local->suspended = false;
1690 local->in_reconfig = false;
1692 ieee80211_flush_completed_scan(local, true);
1694 /* scheduled scan clearly can't be running any more, but tell
1695 * cfg80211 and clear local state
1697 ieee80211_sched_scan_end(local);
1699 list_for_each_entry(sdata, &local->interfaces, list)
1700 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1702 /* Mark channel contexts as not being in the driver any more to avoid
1703 * removing them from the driver during the shutdown process...
1705 mutex_lock(&local->chanctx_mtx);
1706 list_for_each_entry(ctx, &local->chanctx_list, list)
1707 ctx->driver_present = false;
1708 mutex_unlock(&local->chanctx_mtx);
1710 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1713 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1714 struct ieee80211_sub_if_data *sdata)
1716 struct ieee80211_chanctx_conf *conf;
1717 struct ieee80211_chanctx *ctx;
1719 if (!local->use_chanctx)
1722 mutex_lock(&local->chanctx_mtx);
1723 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1724 lockdep_is_held(&local->chanctx_mtx));
1726 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1727 drv_assign_vif_chanctx(local, sdata, ctx);
1729 mutex_unlock(&local->chanctx_mtx);
1732 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1734 struct ieee80211_local *local = sdata->local;
1735 struct sta_info *sta;
1738 mutex_lock(&local->sta_mtx);
1739 list_for_each_entry(sta, &local->sta_list, list) {
1740 enum ieee80211_sta_state state;
1742 if (!sta->uploaded || sta->sdata != sdata)
1745 for (state = IEEE80211_STA_NOTEXIST;
1746 state < sta->sta_state; state++)
1747 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1750 mutex_unlock(&local->sta_mtx);
1753 int ieee80211_reconfig(struct ieee80211_local *local)
1755 struct ieee80211_hw *hw = &local->hw;
1756 struct ieee80211_sub_if_data *sdata;
1757 struct ieee80211_chanctx *ctx;
1758 struct sta_info *sta;
1760 bool reconfig_due_to_wowlan = false;
1761 struct ieee80211_sub_if_data *sched_scan_sdata;
1762 struct cfg80211_sched_scan_request *sched_scan_req;
1763 bool sched_scan_stopped = false;
1764 bool suspended = local->suspended;
1766 /* nothing to do if HW shouldn't run */
1767 if (!local->open_count)
1772 local->resuming = true;
1774 if (local->wowlan) {
1776 * In the wowlan case, both mac80211 and the device
1777 * are functional when the resume op is called, so
1778 * clear local->suspended so the device could operate
1779 * normally (e.g. pass rx frames).
1781 local->suspended = false;
1782 res = drv_resume(local);
1783 local->wowlan = false;
1785 local->resuming = false;
1792 * res is 1, which means the driver requested
1793 * to go through a regular reset on wakeup.
1794 * restore local->suspended in this case.
1796 reconfig_due_to_wowlan = true;
1797 local->suspended = true;
1802 * In case of hw_restart during suspend (without wowlan),
1803 * cancel restart work, as we are reconfiguring the device
1805 * Note that restart_work is scheduled on a frozen workqueue,
1806 * so we can't deadlock in this case.
1808 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1809 cancel_work_sync(&local->restart_work);
1811 local->started = false;
1814 * Upon resume hardware can sometimes be goofy due to
1815 * various platform / driver / bus issues, so restarting
1816 * the device may at times not work immediately. Propagate
1819 res = drv_start(local);
1822 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1824 WARN(1, "Hardware became unavailable during restart.\n");
1825 ieee80211_handle_reconfig_failure(local);
1829 /* setup fragmentation threshold */
1830 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1832 /* setup RTS threshold */
1833 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1835 /* reset coverage class */
1836 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1838 ieee80211_led_radio(local, true);
1839 ieee80211_mod_tpt_led_trig(local,
1840 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1842 /* add interfaces */
1843 sdata = rtnl_dereference(local->monitor_sdata);
1845 /* in HW restart it exists already */
1846 WARN_ON(local->resuming);
1847 res = drv_add_interface(local, sdata);
1849 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1855 list_for_each_entry(sdata, &local->interfaces, list) {
1856 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1857 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1858 ieee80211_sdata_running(sdata)) {
1859 res = drv_add_interface(local, sdata);
1865 /* If adding any of the interfaces failed above, roll back and
1869 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1871 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1872 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1873 ieee80211_sdata_running(sdata))
1874 drv_remove_interface(local, sdata);
1875 ieee80211_handle_reconfig_failure(local);
1879 /* add channel contexts */
1880 if (local->use_chanctx) {
1881 mutex_lock(&local->chanctx_mtx);
1882 list_for_each_entry(ctx, &local->chanctx_list, list)
1883 if (ctx->replace_state !=
1884 IEEE80211_CHANCTX_REPLACES_OTHER)
1885 WARN_ON(drv_add_chanctx(local, ctx));
1886 mutex_unlock(&local->chanctx_mtx);
1888 sdata = rtnl_dereference(local->monitor_sdata);
1889 if (sdata && ieee80211_sdata_running(sdata))
1890 ieee80211_assign_chanctx(local, sdata);
1893 /* reconfigure hardware */
1894 ieee80211_hw_config(local, ~0);
1896 ieee80211_configure_filter(local);
1898 /* Finally also reconfigure all the BSS information */
1899 list_for_each_entry(sdata, &local->interfaces, list) {
1902 if (!ieee80211_sdata_running(sdata))
1905 ieee80211_assign_chanctx(local, sdata);
1907 switch (sdata->vif.type) {
1908 case NL80211_IFTYPE_AP_VLAN:
1909 case NL80211_IFTYPE_MONITOR:
1912 ieee80211_reconfig_stations(sdata);
1914 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1915 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1916 drv_conf_tx(local, sdata, i,
1917 &sdata->tx_conf[i]);
1921 /* common change flags for all interface types */
1922 changed = BSS_CHANGED_ERP_CTS_PROT |
1923 BSS_CHANGED_ERP_PREAMBLE |
1924 BSS_CHANGED_ERP_SLOT |
1926 BSS_CHANGED_BASIC_RATES |
1927 BSS_CHANGED_BEACON_INT |
1932 BSS_CHANGED_TXPOWER;
1934 switch (sdata->vif.type) {
1935 case NL80211_IFTYPE_STATION:
1936 changed |= BSS_CHANGED_ASSOC |
1937 BSS_CHANGED_ARP_FILTER |
1940 /* Re-send beacon info report to the driver */
1941 if (sdata->u.mgd.have_beacon)
1942 changed |= BSS_CHANGED_BEACON_INFO;
1945 ieee80211_bss_info_change_notify(sdata, changed);
1946 sdata_unlock(sdata);
1948 case NL80211_IFTYPE_OCB:
1949 changed |= BSS_CHANGED_OCB;
1950 ieee80211_bss_info_change_notify(sdata, changed);
1952 case NL80211_IFTYPE_ADHOC:
1953 changed |= BSS_CHANGED_IBSS;
1955 case NL80211_IFTYPE_AP:
1956 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1958 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1959 changed |= BSS_CHANGED_AP_PROBE_RESP;
1961 if (rcu_access_pointer(sdata->u.ap.beacon))
1962 drv_start_ap(local, sdata);
1966 case NL80211_IFTYPE_MESH_POINT:
1967 if (sdata->vif.bss_conf.enable_beacon) {
1968 changed |= BSS_CHANGED_BEACON |
1969 BSS_CHANGED_BEACON_ENABLED;
1970 ieee80211_bss_info_change_notify(sdata, changed);
1973 case NL80211_IFTYPE_WDS:
1974 case NL80211_IFTYPE_AP_VLAN:
1975 case NL80211_IFTYPE_MONITOR:
1976 case NL80211_IFTYPE_P2P_DEVICE:
1979 case NL80211_IFTYPE_UNSPECIFIED:
1980 case NUM_NL80211_IFTYPES:
1981 case NL80211_IFTYPE_P2P_CLIENT:
1982 case NL80211_IFTYPE_P2P_GO:
1988 ieee80211_recalc_ps(local);
1991 * The sta might be in psm against the ap (e.g. because
1992 * this was the state before a hw restart), so we
1993 * explicitly send a null packet in order to make sure
1994 * it'll sync against the ap (and get out of psm).
1996 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1997 list_for_each_entry(sdata, &local->interfaces, list) {
1998 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2000 if (!sdata->u.mgd.associated)
2003 ieee80211_send_nullfunc(local, sdata, false);
2007 /* APs are now beaconing, add back stations */
2008 mutex_lock(&local->sta_mtx);
2009 list_for_each_entry(sta, &local->sta_list, list) {
2010 enum ieee80211_sta_state state;
2015 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2016 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2019 for (state = IEEE80211_STA_NOTEXIST;
2020 state < sta->sta_state; state++)
2021 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2024 mutex_unlock(&local->sta_mtx);
2027 list_for_each_entry(sdata, &local->interfaces, list)
2028 ieee80211_reset_crypto_tx_tailroom(sdata);
2030 list_for_each_entry(sdata, &local->interfaces, list)
2031 if (ieee80211_sdata_running(sdata))
2032 ieee80211_enable_keys(sdata);
2034 /* Reconfigure sched scan if it was interrupted by FW restart */
2035 mutex_lock(&local->mtx);
2036 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2037 lockdep_is_held(&local->mtx));
2038 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2039 lockdep_is_held(&local->mtx));
2040 if (sched_scan_sdata && sched_scan_req)
2042 * Sched scan stopped, but we don't want to report it. Instead,
2043 * we're trying to reschedule. However, if more than one scan
2044 * plan was set, we cannot reschedule since we don't know which
2045 * scan plan was currently running (and some scan plans may have
2046 * already finished).
2048 if (sched_scan_req->n_scan_plans > 1 ||
2049 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2051 sched_scan_stopped = true;
2052 mutex_unlock(&local->mtx);
2054 if (sched_scan_stopped)
2055 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2058 local->in_reconfig = false;
2061 if (local->monitors == local->open_count && local->monitors > 0)
2062 ieee80211_add_virtual_monitor(local);
2065 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2066 * sessions can be established after a resume.
2068 * Also tear down aggregation sessions since reconfiguring
2069 * them in a hardware restart scenario is not easily done
2070 * right now, and the hardware will have lost information
2071 * about the sessions, but we and the AP still think they
2072 * are active. This is really a workaround though.
2074 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2075 mutex_lock(&local->sta_mtx);
2077 list_for_each_entry(sta, &local->sta_list, list) {
2078 if (!local->resuming)
2079 ieee80211_sta_tear_down_BA_sessions(
2080 sta, AGG_STOP_LOCAL_REQUEST);
2081 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2084 mutex_unlock(&local->sta_mtx);
2087 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2088 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2092 * If this is for hw restart things are still running.
2093 * We may want to change that later, however.
2095 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2096 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2102 /* first set suspended false, then resuming */
2103 local->suspended = false;
2105 local->resuming = false;
2107 ieee80211_flush_completed_scan(local, false);
2109 if (local->open_count && !reconfig_due_to_wowlan)
2110 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2112 list_for_each_entry(sdata, &local->interfaces, list) {
2113 if (!ieee80211_sdata_running(sdata))
2115 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2116 ieee80211_sta_restart(sdata);
2119 mod_timer(&local->sta_cleanup, jiffies + 1);
2127 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2129 struct ieee80211_sub_if_data *sdata;
2130 struct ieee80211_local *local;
2131 struct ieee80211_key *key;
2136 sdata = vif_to_sdata(vif);
2137 local = sdata->local;
2139 if (WARN_ON(!local->resuming))
2142 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2145 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2147 mutex_lock(&local->key_mtx);
2148 list_for_each_entry(key, &sdata->key_list, list)
2149 key->flags |= KEY_FLAG_TAINTED;
2150 mutex_unlock(&local->key_mtx);
2152 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2154 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2156 struct ieee80211_local *local = sdata->local;
2157 struct ieee80211_chanctx_conf *chanctx_conf;
2158 struct ieee80211_chanctx *chanctx;
2160 mutex_lock(&local->chanctx_mtx);
2162 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2163 lockdep_is_held(&local->chanctx_mtx));
2166 * This function can be called from a work, thus it may be possible
2167 * that the chanctx_conf is removed (due to a disconnection, for
2169 * So nothing should be done in such case.
2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175 ieee80211_recalc_smps_chanctx(local, chanctx);
2177 mutex_unlock(&local->chanctx_mtx);
2180 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2182 struct ieee80211_local *local = sdata->local;
2183 struct ieee80211_chanctx_conf *chanctx_conf;
2184 struct ieee80211_chanctx *chanctx;
2186 mutex_lock(&local->chanctx_mtx);
2188 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2189 lockdep_is_held(&local->chanctx_mtx));
2191 if (WARN_ON_ONCE(!chanctx_conf))
2194 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2195 ieee80211_recalc_chanctx_min_def(local, chanctx);
2197 mutex_unlock(&local->chanctx_mtx);
2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2202 size_t pos = offset;
2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205 pos += 2 + ies[pos + 1];
2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2234 WARN_ON(rssi_min_thold == rssi_max_thold ||
2235 rssi_min_thold > rssi_max_thold);
2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2246 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2255 *pos++ = WLAN_EID_HT_CAPABILITY;
2256 *pos++ = sizeof(struct ieee80211_ht_cap);
2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2259 /* capability flags */
2260 tmp = cpu_to_le16(cap);
2261 memcpy(pos, &tmp, sizeof(u16));
2264 /* AMPDU parameters */
2265 *pos++ = ht_cap->ampdu_factor |
2266 (ht_cap->ampdu_density <<
2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271 pos += sizeof(ht_cap->mcs);
2273 /* extended capabilities */
2274 pos += sizeof(__le16);
2276 /* BF capabilities */
2277 pos += sizeof(__le32);
2279 /* antenna selection */
2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2290 *pos++ = WLAN_EID_VHT_CAPABILITY;
2291 *pos++ = sizeof(struct ieee80211_vht_cap);
2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2294 /* capability flags */
2295 tmp = cpu_to_le32(cap);
2296 memcpy(pos, &tmp, sizeof(u32));
2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301 pos += sizeof(vht_cap->vht_mcs);
2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2307 const struct cfg80211_chan_def *chandef,
2308 u16 prot_mode, bool rifs_mode)
2310 struct ieee80211_ht_operation *ht_oper;
2311 /* Build HT Information */
2312 *pos++ = WLAN_EID_HT_OPERATION;
2313 *pos++ = sizeof(struct ieee80211_ht_operation);
2314 ht_oper = (struct ieee80211_ht_operation *)pos;
2315 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316 chandef->chan->center_freq);
2317 switch (chandef->width) {
2318 case NL80211_CHAN_WIDTH_160:
2319 case NL80211_CHAN_WIDTH_80P80:
2320 case NL80211_CHAN_WIDTH_80:
2321 case NL80211_CHAN_WIDTH_40:
2322 if (chandef->center_freq1 > chandef->chan->center_freq)
2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333 chandef->width != NL80211_CHAN_WIDTH_20)
2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2337 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2339 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2340 ht_oper->stbc_param = 0x0000;
2342 /* It seems that Basic MCS set and Supported MCS set
2343 are identical for the first 10 bytes */
2344 memset(&ht_oper->basic_set, 0, 16);
2345 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2347 return pos + sizeof(struct ieee80211_ht_operation);
2350 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2351 const struct cfg80211_chan_def *chandef)
2353 struct ieee80211_vht_operation *vht_oper;
2355 *pos++ = WLAN_EID_VHT_OPERATION;
2356 *pos++ = sizeof(struct ieee80211_vht_operation);
2357 vht_oper = (struct ieee80211_vht_operation *)pos;
2358 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2359 chandef->center_freq1);
2360 if (chandef->center_freq2)
2361 vht_oper->center_freq_seg2_idx =
2362 ieee80211_frequency_to_channel(chandef->center_freq2);
2364 vht_oper->center_freq_seg2_idx = 0x00;
2366 switch (chandef->width) {
2367 case NL80211_CHAN_WIDTH_160:
2368 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2370 case NL80211_CHAN_WIDTH_80P80:
2371 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2373 case NL80211_CHAN_WIDTH_80:
2374 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2377 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2381 /* don't require special VHT peer rates */
2382 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2384 return pos + sizeof(struct ieee80211_vht_operation);
2387 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2388 const struct ieee80211_ht_operation *ht_oper,
2389 struct cfg80211_chan_def *chandef)
2391 enum nl80211_channel_type channel_type;
2394 cfg80211_chandef_create(chandef, control_chan,
2395 NL80211_CHAN_NO_HT);
2399 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2400 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2401 channel_type = NL80211_CHAN_HT20;
2403 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2404 channel_type = NL80211_CHAN_HT40PLUS;
2406 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2407 channel_type = NL80211_CHAN_HT40MINUS;
2410 channel_type = NL80211_CHAN_NO_HT;
2413 cfg80211_chandef_create(chandef, control_chan, channel_type);
2416 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2417 const struct ieee80211_vht_operation *oper,
2418 struct cfg80211_chan_def *chandef)
2423 chandef->chan = control_chan;
2425 switch (oper->chan_width) {
2426 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2428 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2429 chandef->width = NL80211_CHAN_WIDTH_80;
2431 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2432 chandef->width = NL80211_CHAN_WIDTH_160;
2434 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2435 chandef->width = NL80211_CHAN_WIDTH_80P80;
2441 chandef->center_freq1 =
2442 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2443 control_chan->band);
2444 chandef->center_freq2 =
2445 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2446 control_chan->band);
2449 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2450 const struct ieee80211_supported_band *sband,
2451 const u8 *srates, int srates_len, u32 *rates)
2453 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2454 int shift = ieee80211_chandef_get_shift(chandef);
2455 struct ieee80211_rate *br;
2456 int brate, rate, i, j, count = 0;
2460 for (i = 0; i < srates_len; i++) {
2461 rate = srates[i] & 0x7f;
2463 for (j = 0; j < sband->n_bitrates; j++) {
2464 br = &sband->bitrates[j];
2465 if ((rate_flags & br->flags) != rate_flags)
2468 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2469 if (brate == rate) {
2479 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2480 struct sk_buff *skb, bool need_basic,
2481 enum ieee80211_band band)
2483 struct ieee80211_local *local = sdata->local;
2484 struct ieee80211_supported_band *sband;
2487 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2490 shift = ieee80211_vif_get_shift(&sdata->vif);
2491 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2492 sband = local->hw.wiphy->bands[band];
2494 for (i = 0; i < sband->n_bitrates; i++) {
2495 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2502 if (skb_tailroom(skb) < rates + 2)
2505 pos = skb_put(skb, rates + 2);
2506 *pos++ = WLAN_EID_SUPP_RATES;
2508 for (i = 0; i < rates; i++) {
2510 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2513 if (need_basic && basic_rates & BIT(i))
2515 rate = sband->bitrates[i].bitrate;
2516 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2518 *pos++ = basic | (u8) rate;
2524 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2525 struct sk_buff *skb, bool need_basic,
2526 enum ieee80211_band band)
2528 struct ieee80211_local *local = sdata->local;
2529 struct ieee80211_supported_band *sband;
2531 u8 i, exrates, *pos;
2532 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2535 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2536 shift = ieee80211_vif_get_shift(&sdata->vif);
2538 sband = local->hw.wiphy->bands[band];
2540 for (i = 0; i < sband->n_bitrates; i++) {
2541 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2551 if (skb_tailroom(skb) < exrates + 2)
2555 pos = skb_put(skb, exrates + 2);
2556 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2558 for (i = 8; i < sband->n_bitrates; i++) {
2560 if ((rate_flags & sband->bitrates[i].flags)
2563 if (need_basic && basic_rates & BIT(i))
2565 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2567 *pos++ = basic | (u8) rate;
2573 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2575 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2579 /* non-managed type inferfaces */
2582 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2584 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2586 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2591 /* TODO: consider rx_highest */
2593 if (mcs->rx_mask[3])
2595 if (mcs->rx_mask[2])
2597 if (mcs->rx_mask[1])
2603 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2604 * @local: mac80211 hw info struct
2605 * @status: RX status
2606 * @mpdu_len: total MPDU length (including FCS)
2607 * @mpdu_offset: offset into MPDU to calculate timestamp at
2609 * This function calculates the RX timestamp at the given MPDU offset, taking
2610 * into account what the RX timestamp was. An offset of 0 will just normalize
2611 * the timestamp to TSF at beginning of MPDU reception.
2613 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2614 struct ieee80211_rx_status *status,
2615 unsigned int mpdu_len,
2616 unsigned int mpdu_offset)
2618 u64 ts = status->mactime;
2619 struct rate_info ri;
2622 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2625 memset(&ri, 0, sizeof(ri));
2627 /* Fill cfg80211 rate info */
2628 if (status->flag & RX_FLAG_HT) {
2629 ri.mcs = status->rate_idx;
2630 ri.flags |= RATE_INFO_FLAGS_MCS;
2631 if (status->flag & RX_FLAG_40MHZ)
2632 ri.bw = RATE_INFO_BW_40;
2634 ri.bw = RATE_INFO_BW_20;
2635 if (status->flag & RX_FLAG_SHORT_GI)
2636 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2637 } else if (status->flag & RX_FLAG_VHT) {
2638 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2639 ri.mcs = status->rate_idx;
2640 ri.nss = status->vht_nss;
2641 if (status->flag & RX_FLAG_40MHZ)
2642 ri.bw = RATE_INFO_BW_40;
2643 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2644 ri.bw = RATE_INFO_BW_80;
2645 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2646 ri.bw = RATE_INFO_BW_160;
2648 ri.bw = RATE_INFO_BW_20;
2649 if (status->flag & RX_FLAG_SHORT_GI)
2650 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2652 struct ieee80211_supported_band *sband;
2656 if (status->flag & RX_FLAG_10MHZ) {
2658 ri.bw = RATE_INFO_BW_10;
2659 } else if (status->flag & RX_FLAG_5MHZ) {
2661 ri.bw = RATE_INFO_BW_5;
2663 ri.bw = RATE_INFO_BW_20;
2666 sband = local->hw.wiphy->bands[status->band];
2667 bitrate = sband->bitrates[status->rate_idx].bitrate;
2668 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2671 rate = cfg80211_calculate_bitrate(&ri);
2672 if (WARN_ONCE(!rate,
2673 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2674 (unsigned long long)status->flag, status->rate_idx,
2678 /* rewind from end of MPDU */
2679 if (status->flag & RX_FLAG_MACTIME_END)
2680 ts -= mpdu_len * 8 * 10 / rate;
2682 ts += mpdu_offset * 8 * 10 / rate;
2687 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2689 struct ieee80211_sub_if_data *sdata;
2690 struct cfg80211_chan_def chandef;
2692 mutex_lock(&local->mtx);
2693 mutex_lock(&local->iflist_mtx);
2694 list_for_each_entry(sdata, &local->interfaces, list) {
2695 /* it might be waiting for the local->mtx, but then
2696 * by the time it gets it, sdata->wdev.cac_started
2697 * will no longer be true
2699 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2701 if (sdata->wdev.cac_started) {
2702 chandef = sdata->vif.bss_conf.chandef;
2703 ieee80211_vif_release_channel(sdata);
2704 cfg80211_cac_event(sdata->dev,
2706 NL80211_RADAR_CAC_ABORTED,
2710 mutex_unlock(&local->iflist_mtx);
2711 mutex_unlock(&local->mtx);
2714 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2716 struct ieee80211_local *local =
2717 container_of(work, struct ieee80211_local, radar_detected_work);
2718 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2719 struct ieee80211_chanctx *ctx;
2720 int num_chanctx = 0;
2722 mutex_lock(&local->chanctx_mtx);
2723 list_for_each_entry(ctx, &local->chanctx_list, list) {
2724 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2728 chandef = ctx->conf.def;
2730 mutex_unlock(&local->chanctx_mtx);
2732 ieee80211_dfs_cac_cancel(local);
2734 if (num_chanctx > 1)
2735 /* XXX: multi-channel is not supported yet */
2738 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2741 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2743 struct ieee80211_local *local = hw_to_local(hw);
2745 trace_api_radar_detected(local);
2747 ieee80211_queue_work(hw, &local->radar_detected_work);
2749 EXPORT_SYMBOL(ieee80211_radar_detected);
2751 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2757 case NL80211_CHAN_WIDTH_20:
2758 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2759 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2761 case NL80211_CHAN_WIDTH_40:
2762 c->width = NL80211_CHAN_WIDTH_20;
2763 c->center_freq1 = c->chan->center_freq;
2764 ret = IEEE80211_STA_DISABLE_40MHZ |
2765 IEEE80211_STA_DISABLE_VHT;
2767 case NL80211_CHAN_WIDTH_80:
2768 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2772 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2773 c->width = NL80211_CHAN_WIDTH_40;
2774 ret = IEEE80211_STA_DISABLE_VHT;
2776 case NL80211_CHAN_WIDTH_80P80:
2777 c->center_freq2 = 0;
2778 c->width = NL80211_CHAN_WIDTH_80;
2779 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2780 IEEE80211_STA_DISABLE_160MHZ;
2782 case NL80211_CHAN_WIDTH_160:
2784 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2787 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2788 c->width = NL80211_CHAN_WIDTH_80;
2789 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2790 IEEE80211_STA_DISABLE_160MHZ;
2793 case NL80211_CHAN_WIDTH_20_NOHT:
2795 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2796 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2798 case NL80211_CHAN_WIDTH_5:
2799 case NL80211_CHAN_WIDTH_10:
2802 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2806 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2812 * Returns true if smps_mode_new is strictly more restrictive than
2815 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2816 enum ieee80211_smps_mode smps_mode_new)
2818 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2819 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2822 switch (smps_mode_old) {
2823 case IEEE80211_SMPS_STATIC:
2825 case IEEE80211_SMPS_DYNAMIC:
2826 return smps_mode_new == IEEE80211_SMPS_STATIC;
2827 case IEEE80211_SMPS_OFF:
2828 return smps_mode_new != IEEE80211_SMPS_OFF;
2836 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2837 struct cfg80211_csa_settings *csa_settings)
2839 struct sk_buff *skb;
2840 struct ieee80211_mgmt *mgmt;
2841 struct ieee80211_local *local = sdata->local;
2843 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2844 sizeof(mgmt->u.action.u.chan_switch);
2847 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2848 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2851 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2852 5 + /* channel switch announcement element */
2853 3 + /* secondary channel offset element */
2854 8); /* mesh channel switch parameters element */
2858 skb_reserve(skb, local->tx_headroom);
2859 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2860 memset(mgmt, 0, hdr_len);
2861 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2862 IEEE80211_STYPE_ACTION);
2864 eth_broadcast_addr(mgmt->da);
2865 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2866 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2867 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2869 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2870 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2872 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2873 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2874 pos = skb_put(skb, 5);
2875 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2876 *pos++ = 3; /* IE length */
2877 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2878 freq = csa_settings->chandef.chan->center_freq;
2879 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2880 *pos++ = csa_settings->count; /* count */
2882 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2883 enum nl80211_channel_type ch_type;
2886 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2887 *pos++ = 1; /* IE length */
2888 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2889 if (ch_type == NL80211_CHAN_HT40PLUS)
2890 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2892 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2895 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2896 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2899 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2900 *pos++ = 6; /* IE length */
2901 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2902 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2903 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2904 *pos++ |= csa_settings->block_tx ?
2905 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2906 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2908 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2912 ieee80211_tx_skb(sdata, skb);
2916 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2918 return !(cs == NULL || cs->cipher == 0 ||
2919 cs->hdr_len < cs->pn_len + cs->pn_off ||
2920 cs->hdr_len <= cs->key_idx_off ||
2921 cs->key_idx_shift > 7 ||
2922 cs->key_idx_mask == 0);
2925 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2929 /* Ensure we have enough iftype bitmap space for all iftype values */
2930 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2932 for (i = 0; i < n; i++)
2933 if (!ieee80211_cs_valid(&cs[i]))
2939 const struct ieee80211_cipher_scheme *
2940 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2941 enum nl80211_iftype iftype)
2943 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2944 int n = local->hw.n_cipher_schemes;
2946 const struct ieee80211_cipher_scheme *cs = NULL;
2948 for (i = 0; i < n; i++) {
2949 if (l[i].cipher == cipher) {
2955 if (!cs || !(cs->iftype & BIT(iftype)))
2961 int ieee80211_cs_headroom(struct ieee80211_local *local,
2962 struct cfg80211_crypto_settings *crypto,
2963 enum nl80211_iftype iftype)
2965 const struct ieee80211_cipher_scheme *cs;
2966 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2969 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2970 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2973 if (cs && headroom < cs->hdr_len)
2974 headroom = cs->hdr_len;
2977 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2978 if (cs && headroom < cs->hdr_len)
2979 headroom = cs->hdr_len;
2985 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2987 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2994 if (data->count[i] == 1)
2997 if (data->desc[i].interval == 0)
3000 /* End time is in the past, check for repetitions */
3001 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3002 if (data->count[i] < 255) {
3003 if (data->count[i] <= skip) {
3008 data->count[i] -= skip;
3011 data->desc[i].start += skip * data->desc[i].interval;
3017 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3023 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3026 if (!data->count[i])
3029 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3032 cur = data->desc[i].start - tsf;
3036 cur = data->desc[i].start + data->desc[i].duration - tsf;
3045 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3050 * arbitrary limit, used to avoid infinite loops when combined NoA
3051 * descriptors cover the full time period.
3055 ieee80211_extend_absent_time(data, tsf, &offset);
3057 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3061 } while (tries < max_tries);
3066 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3068 u32 next_offset = BIT(31) - 1;
3072 data->has_next_tsf = false;
3073 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3076 if (!data->count[i])
3079 ieee80211_extend_noa_desc(data, tsf, i);
3080 start = data->desc[i].start - tsf;
3082 data->absent |= BIT(i);
3084 if (next_offset > start)
3085 next_offset = start;
3087 data->has_next_tsf = true;
3091 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3093 data->next_tsf = tsf + next_offset;
3095 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3097 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3098 struct ieee80211_noa_data *data, u32 tsf)
3103 memset(data, 0, sizeof(*data));
3105 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3106 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3108 if (!desc->count || !desc->duration)
3111 data->count[i] = desc->count;
3112 data->desc[i].start = le32_to_cpu(desc->start_time);
3113 data->desc[i].duration = le32_to_cpu(desc->duration);
3114 data->desc[i].interval = le32_to_cpu(desc->interval);
3116 if (data->count[i] > 1 &&
3117 data->desc[i].interval < data->desc[i].duration)
3120 ieee80211_extend_noa_desc(data, tsf, i);
3125 ieee80211_update_p2p_noa(data, tsf);
3129 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3131 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3132 struct ieee80211_sub_if_data *sdata)
3134 u64 tsf = drv_get_tsf(local, sdata);
3136 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3137 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3141 if (tsf == -1ULL || !beacon_int || !dtim_period)
3144 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3145 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3149 ps = &sdata->bss->ps;
3150 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3151 ps = &sdata->u.mesh.ps;
3157 * actually finds last dtim_count, mac80211 will update in
3158 * __beacon_add_tim().
3159 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3161 do_div(tsf, beacon_int);
3162 bcns_from_dtim = do_div(tsf, dtim_period);
3163 /* just had a DTIM */
3164 if (!bcns_from_dtim)
3167 dtim_count = dtim_period - bcns_from_dtim;
3169 ps->dtim_count = dtim_count;
3172 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3173 struct ieee80211_chanctx *ctx)
3175 struct ieee80211_sub_if_data *sdata;
3176 u8 radar_detect = 0;
3178 lockdep_assert_held(&local->chanctx_mtx);
3180 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3183 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3184 if (sdata->reserved_radar_required)
3185 radar_detect |= BIT(sdata->reserved_chandef.width);
3188 * An in-place reservation context should not have any assigned vifs
3189 * until it replaces the other context.
3191 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3192 !list_empty(&ctx->assigned_vifs));
3194 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3195 if (sdata->radar_required)
3196 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3198 return radar_detect;
3201 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3202 const struct cfg80211_chan_def *chandef,
3203 enum ieee80211_chanctx_mode chanmode,
3206 struct ieee80211_local *local = sdata->local;
3207 struct ieee80211_sub_if_data *sdata_iter;
3208 enum nl80211_iftype iftype = sdata->wdev.iftype;
3209 int num[NUM_NL80211_IFTYPES];
3210 struct ieee80211_chanctx *ctx;
3211 int num_different_channels = 0;
3214 lockdep_assert_held(&local->chanctx_mtx);
3216 if (WARN_ON(hweight32(radar_detect) > 1))
3219 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3224 num_different_channels = 1;
3226 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3229 /* Always allow software iftypes */
3230 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3236 memset(num, 0, sizeof(num));
3238 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3241 list_for_each_entry(ctx, &local->chanctx_list, list) {
3242 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3244 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3245 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3246 num_different_channels++;
3249 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3250 cfg80211_chandef_compatible(chandef,
3253 num_different_channels++;
3256 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3257 struct wireless_dev *wdev_iter;
3259 wdev_iter = &sdata_iter->wdev;
3261 if (sdata_iter == sdata ||
3262 !ieee80211_sdata_running(sdata_iter) ||
3263 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3266 num[wdev_iter->iftype]++;
3270 if (total == 1 && !radar_detect)
3273 return cfg80211_check_combinations(local->hw.wiphy,
3274 num_different_channels,
3279 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3282 u32 *max_num_different_channels = data;
3284 *max_num_different_channels = max(*max_num_different_channels,
3285 c->num_different_channels);
3288 int ieee80211_max_num_channels(struct ieee80211_local *local)
3290 struct ieee80211_sub_if_data *sdata;
3291 int num[NUM_NL80211_IFTYPES] = {};
3292 struct ieee80211_chanctx *ctx;
3293 int num_different_channels = 0;
3294 u8 radar_detect = 0;
3295 u32 max_num_different_channels = 1;
3298 lockdep_assert_held(&local->chanctx_mtx);
3300 list_for_each_entry(ctx, &local->chanctx_list, list) {
3301 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3304 num_different_channels++;
3306 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3309 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3310 num[sdata->wdev.iftype]++;
3312 err = cfg80211_iter_combinations(local->hw.wiphy,
3313 num_different_channels, radar_detect,
3314 num, ieee80211_iter_max_chans,
3315 &max_num_different_channels);
3319 return max_num_different_channels;
3322 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3324 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3325 *buf++ = 7; /* len */
3326 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3329 *buf++ = 2; /* WME */
3330 *buf++ = 0; /* WME info */
3331 *buf++ = 1; /* WME ver */
3332 *buf++ = qosinfo; /* U-APSD no in use */
3337 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3338 struct sta_info *sta,
3339 struct txq_info *txqi, int tid)
3341 skb_queue_head_init(&txqi->queue);
3342 txqi->txq.vif = &sdata->vif;
3345 txqi->txq.sta = &sta->sta;
3346 sta->sta.txq[tid] = &txqi->txq;
3347 txqi->txq.tid = tid;
3348 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3350 sdata->vif.txq = &txqi->txq;
3352 txqi->txq.ac = IEEE80211_AC_BE;