1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2002-2005, Instant802 Networks, Inc.
4  * Copyright 2005-2006, Devicescape Software, Inc.
5  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
6  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
7  * Copyright 2013-2014  Intel Mobile Communications GmbH
8  * Copyright (C) 2015-2017	Intel Deutschland GmbH
9  * Copyright (C) 2018-2022 Intel Corporation
10  *
11  * utilities for mac80211
12  */
13 
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
27 
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wme.h"
33 #include "led.h"
34 #include "wep.h"
35 
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38 
wiphy_to_ieee80211_hw(struct wiphy * wiphy)39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40 {
41 	struct ieee80211_local *local;
42 
43 	local = wiphy_priv(wiphy);
44 	return &local->hw;
45 }
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47 
ieee80211_get_bssid(struct ieee80211_hdr * hdr,size_t len,enum nl80211_iftype type)48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
49 			enum nl80211_iftype type)
50 {
51 	__le16 fc = hdr->frame_control;
52 
53 	if (ieee80211_is_data(fc)) {
54 		if (len < 24) /* drop incorrect hdr len (data) */
55 			return NULL;
56 
57 		if (ieee80211_has_a4(fc))
58 			return NULL;
59 		if (ieee80211_has_tods(fc))
60 			return hdr->addr1;
61 		if (ieee80211_has_fromds(fc))
62 			return hdr->addr2;
63 
64 		return hdr->addr3;
65 	}
66 
67 	if (ieee80211_is_s1g_beacon(fc)) {
68 		struct ieee80211_ext *ext = (void *) hdr;
69 
70 		return ext->u.s1g_beacon.sa;
71 	}
72 
73 	if (ieee80211_is_mgmt(fc)) {
74 		if (len < 24) /* drop incorrect hdr len (mgmt) */
75 			return NULL;
76 		return hdr->addr3;
77 	}
78 
79 	if (ieee80211_is_ctl(fc)) {
80 		if (ieee80211_is_pspoll(fc))
81 			return hdr->addr1;
82 
83 		if (ieee80211_is_back_req(fc)) {
84 			switch (type) {
85 			case NL80211_IFTYPE_STATION:
86 				return hdr->addr2;
87 			case NL80211_IFTYPE_AP:
88 			case NL80211_IFTYPE_AP_VLAN:
89 				return hdr->addr1;
90 			default:
91 				break; /* fall through to the return */
92 			}
93 		}
94 	}
95 
96 	return NULL;
97 }
98 EXPORT_SYMBOL(ieee80211_get_bssid);
99 
ieee80211_tx_set_protected(struct ieee80211_tx_data * tx)100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
101 {
102 	struct sk_buff *skb;
103 	struct ieee80211_hdr *hdr;
104 
105 	skb_queue_walk(&tx->skbs, skb) {
106 		hdr = (struct ieee80211_hdr *) skb->data;
107 		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
108 	}
109 }
110 
ieee80211_frame_duration(enum nl80211_band band,size_t len,int rate,int erp,int short_preamble,int shift)111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
112 			     int rate, int erp, int short_preamble,
113 			     int shift)
114 {
115 	int dur;
116 
117 	/* calculate duration (in microseconds, rounded up to next higher
118 	 * integer if it includes a fractional microsecond) to send frame of
119 	 * len bytes (does not include FCS) at the given rate. Duration will
120 	 * also include SIFS.
121 	 *
122 	 * rate is in 100 kbps, so divident is multiplied by 10 in the
123 	 * DIV_ROUND_UP() operations.
124 	 *
125 	 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
126 	 * is assumed to be 0 otherwise.
127 	 */
128 
129 	if (band == NL80211_BAND_5GHZ || erp) {
130 		/*
131 		 * OFDM:
132 		 *
133 		 * N_DBPS = DATARATE x 4
134 		 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
135 		 *	(16 = SIGNAL time, 6 = tail bits)
136 		 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 		 *
138 		 * T_SYM = 4 usec
139 		 * 802.11a - 18.5.2: aSIFSTime = 16 usec
140 		 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
141 		 *	signal ext = 6 usec
142 		 */
143 		dur = 16; /* SIFS + signal ext */
144 		dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
145 		dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
146 
147 		/* IEEE 802.11-2012 18.3.2.4: all values above are:
148 		 *  * times 4 for 5 MHz
149 		 *  * times 2 for 10 MHz
150 		 */
151 		dur *= 1 << shift;
152 
153 		/* rates should already consider the channel bandwidth,
154 		 * don't apply divisor again.
155 		 */
156 		dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
157 					4 * rate); /* T_SYM x N_SYM */
158 	} else {
159 		/*
160 		 * 802.11b or 802.11g with 802.11b compatibility:
161 		 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
162 		 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
163 		 *
164 		 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
165 		 * aSIFSTime = 10 usec
166 		 * aPreambleLength = 144 usec or 72 usec with short preamble
167 		 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
168 		 */
169 		dur = 10; /* aSIFSTime = 10 usec */
170 		dur += short_preamble ? (72 + 24) : (144 + 48);
171 
172 		dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
173 	}
174 
175 	return dur;
176 }
177 
178 /* Exported duration function for driver use */
ieee80211_generic_frame_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_band band,size_t frame_len,struct ieee80211_rate * rate)179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
180 					struct ieee80211_vif *vif,
181 					enum nl80211_band band,
182 					size_t frame_len,
183 					struct ieee80211_rate *rate)
184 {
185 	struct ieee80211_sub_if_data *sdata;
186 	u16 dur;
187 	int erp, shift = 0;
188 	bool short_preamble = false;
189 
190 	erp = 0;
191 	if (vif) {
192 		sdata = vif_to_sdata(vif);
193 		short_preamble = sdata->vif.bss_conf.use_short_preamble;
194 		if (sdata->deflink.operating_11g_mode)
195 			erp = rate->flags & IEEE80211_RATE_ERP_G;
196 		shift = ieee80211_vif_get_shift(vif);
197 	}
198 
199 	dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
200 				       short_preamble, shift);
201 
202 	return cpu_to_le16(dur);
203 }
204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
205 
ieee80211_rts_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
207 			      struct ieee80211_vif *vif, size_t frame_len,
208 			      const struct ieee80211_tx_info *frame_txctl)
209 {
210 	struct ieee80211_local *local = hw_to_local(hw);
211 	struct ieee80211_rate *rate;
212 	struct ieee80211_sub_if_data *sdata;
213 	bool short_preamble;
214 	int erp, shift = 0, bitrate;
215 	u16 dur;
216 	struct ieee80211_supported_band *sband;
217 
218 	sband = local->hw.wiphy->bands[frame_txctl->band];
219 
220 	short_preamble = false;
221 
222 	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
223 
224 	erp = 0;
225 	if (vif) {
226 		sdata = vif_to_sdata(vif);
227 		short_preamble = sdata->vif.bss_conf.use_short_preamble;
228 		if (sdata->deflink.operating_11g_mode)
229 			erp = rate->flags & IEEE80211_RATE_ERP_G;
230 		shift = ieee80211_vif_get_shift(vif);
231 	}
232 
233 	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
234 
235 	/* CTS duration */
236 	dur = ieee80211_frame_duration(sband->band, 10, bitrate,
237 				       erp, short_preamble, shift);
238 	/* Data frame duration */
239 	dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
240 					erp, short_preamble, shift);
241 	/* ACK duration */
242 	dur += ieee80211_frame_duration(sband->band, 10, bitrate,
243 					erp, short_preamble, shift);
244 
245 	return cpu_to_le16(dur);
246 }
247 EXPORT_SYMBOL(ieee80211_rts_duration);
248 
ieee80211_ctstoself_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
250 				    struct ieee80211_vif *vif,
251 				    size_t frame_len,
252 				    const struct ieee80211_tx_info *frame_txctl)
253 {
254 	struct ieee80211_local *local = hw_to_local(hw);
255 	struct ieee80211_rate *rate;
256 	struct ieee80211_sub_if_data *sdata;
257 	bool short_preamble;
258 	int erp, shift = 0, bitrate;
259 	u16 dur;
260 	struct ieee80211_supported_band *sband;
261 
262 	sband = local->hw.wiphy->bands[frame_txctl->band];
263 
264 	short_preamble = false;
265 
266 	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
267 	erp = 0;
268 	if (vif) {
269 		sdata = vif_to_sdata(vif);
270 		short_preamble = sdata->vif.bss_conf.use_short_preamble;
271 		if (sdata->deflink.operating_11g_mode)
272 			erp = rate->flags & IEEE80211_RATE_ERP_G;
273 		shift = ieee80211_vif_get_shift(vif);
274 	}
275 
276 	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
277 
278 	/* Data frame duration */
279 	dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
280 				       erp, short_preamble, shift);
281 	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
282 		/* ACK duration */
283 		dur += ieee80211_frame_duration(sband->band, 10, bitrate,
284 						erp, short_preamble, shift);
285 	}
286 
287 	return cpu_to_le16(dur);
288 }
289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
290 
__ieee80211_wake_txqs(struct ieee80211_sub_if_data * sdata,int ac)291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
292 {
293 	struct ieee80211_local *local = sdata->local;
294 	struct ieee80211_vif *vif = &sdata->vif;
295 	struct fq *fq = &local->fq;
296 	struct ps_data *ps = NULL;
297 	struct txq_info *txqi;
298 	struct sta_info *sta;
299 	int i;
300 
301 	local_bh_disable();
302 	spin_lock(&fq->lock);
303 
304 	if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
305 		goto out;
306 
307 	if (sdata->vif.type == NL80211_IFTYPE_AP)
308 		ps = &sdata->bss->ps;
309 
310 	list_for_each_entry_rcu(sta, &local->sta_list, list) {
311 		if (sdata != sta->sdata)
312 			continue;
313 
314 		for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
315 			struct ieee80211_txq *txq = sta->sta.txq[i];
316 
317 			if (!txq)
318 				continue;
319 
320 			txqi = to_txq_info(txq);
321 
322 			if (ac != txq->ac)
323 				continue;
324 
325 			if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
326 						&txqi->flags))
327 				continue;
328 
329 			spin_unlock(&fq->lock);
330 			drv_wake_tx_queue(local, txqi);
331 			spin_lock(&fq->lock);
332 		}
333 	}
334 
335 	if (!vif->txq)
336 		goto out;
337 
338 	txqi = to_txq_info(vif->txq);
339 
340 	if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
341 	    (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
342 		goto out;
343 
344 	spin_unlock(&fq->lock);
345 
346 	drv_wake_tx_queue(local, txqi);
347 	local_bh_enable();
348 	return;
349 out:
350 	spin_unlock(&fq->lock);
351 	local_bh_enable();
352 }
353 
354 static void
355 __releases(&local->queue_stop_reason_lock)
356 __acquires(&local->queue_stop_reason_lock)
_ieee80211_wake_txqs(struct ieee80211_local * local,unsigned long * flags)357 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
358 {
359 	struct ieee80211_sub_if_data *sdata;
360 	int n_acs = IEEE80211_NUM_ACS;
361 	int i;
362 
363 	rcu_read_lock();
364 
365 	if (local->hw.queues < IEEE80211_NUM_ACS)
366 		n_acs = 1;
367 
368 	for (i = 0; i < local->hw.queues; i++) {
369 		if (local->queue_stop_reasons[i])
370 			continue;
371 
372 		spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
373 		list_for_each_entry_rcu(sdata, &local->interfaces, list) {
374 			int ac;
375 
376 			for (ac = 0; ac < n_acs; ac++) {
377 				int ac_queue = sdata->vif.hw_queue[ac];
378 
379 				if (ac_queue == i ||
380 				    sdata->vif.cab_queue == i)
381 					__ieee80211_wake_txqs(sdata, ac);
382 			}
383 		}
384 		spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
385 	}
386 
387 	rcu_read_unlock();
388 }
389 
ieee80211_wake_txqs(struct tasklet_struct * t)390 void ieee80211_wake_txqs(struct tasklet_struct *t)
391 {
392 	struct ieee80211_local *local = from_tasklet(local, t,
393 						     wake_txqs_tasklet);
394 	unsigned long flags;
395 
396 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
397 	_ieee80211_wake_txqs(local, &flags);
398 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
399 }
400 
ieee80211_propagate_queue_wake(struct ieee80211_local * local,int queue)401 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
402 {
403 	struct ieee80211_sub_if_data *sdata;
404 	int n_acs = IEEE80211_NUM_ACS;
405 
406 	if (local->ops->wake_tx_queue)
407 		return;
408 
409 	if (local->hw.queues < IEEE80211_NUM_ACS)
410 		n_acs = 1;
411 
412 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
413 		int ac;
414 
415 		if (!sdata->dev)
416 			continue;
417 
418 		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
419 		    local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
420 			continue;
421 
422 		for (ac = 0; ac < n_acs; ac++) {
423 			int ac_queue = sdata->vif.hw_queue[ac];
424 
425 			if (ac_queue == queue ||
426 			    (sdata->vif.cab_queue == queue &&
427 			     local->queue_stop_reasons[ac_queue] == 0 &&
428 			     skb_queue_empty(&local->pending[ac_queue])))
429 				netif_wake_subqueue(sdata->dev, ac);
430 		}
431 	}
432 }
433 
__ieee80211_wake_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted,unsigned long * flags)434 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
435 				   enum queue_stop_reason reason,
436 				   bool refcounted,
437 				   unsigned long *flags)
438 {
439 	struct ieee80211_local *local = hw_to_local(hw);
440 
441 	trace_wake_queue(local, queue, reason);
442 
443 	if (WARN_ON(queue >= hw->queues))
444 		return;
445 
446 	if (!test_bit(reason, &local->queue_stop_reasons[queue]))
447 		return;
448 
449 	if (!refcounted) {
450 		local->q_stop_reasons[queue][reason] = 0;
451 	} else {
452 		local->q_stop_reasons[queue][reason]--;
453 		if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
454 			local->q_stop_reasons[queue][reason] = 0;
455 	}
456 
457 	if (local->q_stop_reasons[queue][reason] == 0)
458 		__clear_bit(reason, &local->queue_stop_reasons[queue]);
459 
460 	if (local->queue_stop_reasons[queue] != 0)
461 		/* someone still has this queue stopped */
462 		return;
463 
464 	if (skb_queue_empty(&local->pending[queue])) {
465 		rcu_read_lock();
466 		ieee80211_propagate_queue_wake(local, queue);
467 		rcu_read_unlock();
468 	} else
469 		tasklet_schedule(&local->tx_pending_tasklet);
470 
471 	/*
472 	 * Calling _ieee80211_wake_txqs here can be a problem because it may
473 	 * release queue_stop_reason_lock which has been taken by
474 	 * __ieee80211_wake_queue's caller. It is certainly not very nice to
475 	 * release someone's lock, but it is fine because all the callers of
476 	 * __ieee80211_wake_queue call it right before releasing the lock.
477 	 */
478 	if (local->ops->wake_tx_queue) {
479 		if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
480 			tasklet_schedule(&local->wake_txqs_tasklet);
481 		else
482 			_ieee80211_wake_txqs(local, flags);
483 	}
484 }
485 
ieee80211_wake_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)486 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
487 				    enum queue_stop_reason reason,
488 				    bool refcounted)
489 {
490 	struct ieee80211_local *local = hw_to_local(hw);
491 	unsigned long flags;
492 
493 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
494 	__ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
495 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
496 }
497 
ieee80211_wake_queue(struct ieee80211_hw * hw,int queue)498 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
499 {
500 	ieee80211_wake_queue_by_reason(hw, queue,
501 				       IEEE80211_QUEUE_STOP_REASON_DRIVER,
502 				       false);
503 }
504 EXPORT_SYMBOL(ieee80211_wake_queue);
505 
__ieee80211_stop_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)506 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
507 				   enum queue_stop_reason reason,
508 				   bool refcounted)
509 {
510 	struct ieee80211_local *local = hw_to_local(hw);
511 	struct ieee80211_sub_if_data *sdata;
512 	int n_acs = IEEE80211_NUM_ACS;
513 
514 	trace_stop_queue(local, queue, reason);
515 
516 	if (WARN_ON(queue >= hw->queues))
517 		return;
518 
519 	if (!refcounted)
520 		local->q_stop_reasons[queue][reason] = 1;
521 	else
522 		local->q_stop_reasons[queue][reason]++;
523 
524 	if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
525 		return;
526 
527 	if (local->hw.queues < IEEE80211_NUM_ACS)
528 		n_acs = 1;
529 
530 	rcu_read_lock();
531 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
532 		int ac;
533 
534 		if (!sdata->dev)
535 			continue;
536 
537 		for (ac = 0; ac < n_acs; ac++) {
538 			if (!local->ops->wake_tx_queue &&
539 			    (sdata->vif.hw_queue[ac] == queue ||
540 			     sdata->vif.cab_queue == queue))
541 				netif_stop_subqueue(sdata->dev, ac);
542 		}
543 	}
544 	rcu_read_unlock();
545 }
546 
ieee80211_stop_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)547 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
548 				    enum queue_stop_reason reason,
549 				    bool refcounted)
550 {
551 	struct ieee80211_local *local = hw_to_local(hw);
552 	unsigned long flags;
553 
554 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
555 	__ieee80211_stop_queue(hw, queue, reason, refcounted);
556 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
557 }
558 
ieee80211_stop_queue(struct ieee80211_hw * hw,int queue)559 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
560 {
561 	ieee80211_stop_queue_by_reason(hw, queue,
562 				       IEEE80211_QUEUE_STOP_REASON_DRIVER,
563 				       false);
564 }
565 EXPORT_SYMBOL(ieee80211_stop_queue);
566 
ieee80211_add_pending_skb(struct ieee80211_local * local,struct sk_buff * skb)567 void ieee80211_add_pending_skb(struct ieee80211_local *local,
568 			       struct sk_buff *skb)
569 {
570 	struct ieee80211_hw *hw = &local->hw;
571 	unsigned long flags;
572 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
573 	int queue = info->hw_queue;
574 
575 	if (WARN_ON(!info->control.vif)) {
576 		ieee80211_free_txskb(&local->hw, skb);
577 		return;
578 	}
579 
580 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
581 	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
582 			       false);
583 	__skb_queue_tail(&local->pending[queue], skb);
584 	__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
585 			       false, &flags);
586 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
587 }
588 
ieee80211_add_pending_skbs(struct ieee80211_local * local,struct sk_buff_head * skbs)589 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
590 				struct sk_buff_head *skbs)
591 {
592 	struct ieee80211_hw *hw = &local->hw;
593 	struct sk_buff *skb;
594 	unsigned long flags;
595 	int queue, i;
596 
597 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
598 	while ((skb = skb_dequeue(skbs))) {
599 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
600 
601 		if (WARN_ON(!info->control.vif)) {
602 			ieee80211_free_txskb(&local->hw, skb);
603 			continue;
604 		}
605 
606 		queue = info->hw_queue;
607 
608 		__ieee80211_stop_queue(hw, queue,
609 				IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
610 				false);
611 
612 		__skb_queue_tail(&local->pending[queue], skb);
613 	}
614 
615 	for (i = 0; i < hw->queues; i++)
616 		__ieee80211_wake_queue(hw, i,
617 			IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
618 			false, &flags);
619 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
620 }
621 
ieee80211_stop_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)622 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
623 				     unsigned long queues,
624 				     enum queue_stop_reason reason,
625 				     bool refcounted)
626 {
627 	struct ieee80211_local *local = hw_to_local(hw);
628 	unsigned long flags;
629 	int i;
630 
631 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
632 
633 	for_each_set_bit(i, &queues, hw->queues)
634 		__ieee80211_stop_queue(hw, i, reason, refcounted);
635 
636 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
637 }
638 
ieee80211_stop_queues(struct ieee80211_hw * hw)639 void ieee80211_stop_queues(struct ieee80211_hw *hw)
640 {
641 	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
642 					IEEE80211_QUEUE_STOP_REASON_DRIVER,
643 					false);
644 }
645 EXPORT_SYMBOL(ieee80211_stop_queues);
646 
ieee80211_queue_stopped(struct ieee80211_hw * hw,int queue)647 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
648 {
649 	struct ieee80211_local *local = hw_to_local(hw);
650 	unsigned long flags;
651 	int ret;
652 
653 	if (WARN_ON(queue >= hw->queues))
654 		return true;
655 
656 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
657 	ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
658 		       &local->queue_stop_reasons[queue]);
659 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
660 	return ret;
661 }
662 EXPORT_SYMBOL(ieee80211_queue_stopped);
663 
ieee80211_wake_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)664 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
665 				     unsigned long queues,
666 				     enum queue_stop_reason reason,
667 				     bool refcounted)
668 {
669 	struct ieee80211_local *local = hw_to_local(hw);
670 	unsigned long flags;
671 	int i;
672 
673 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
674 
675 	for_each_set_bit(i, &queues, hw->queues)
676 		__ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
677 
678 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
679 }
680 
ieee80211_wake_queues(struct ieee80211_hw * hw)681 void ieee80211_wake_queues(struct ieee80211_hw *hw)
682 {
683 	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
684 					IEEE80211_QUEUE_STOP_REASON_DRIVER,
685 					false);
686 }
687 EXPORT_SYMBOL(ieee80211_wake_queues);
688 
689 static unsigned int
ieee80211_get_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)690 ieee80211_get_vif_queues(struct ieee80211_local *local,
691 			 struct ieee80211_sub_if_data *sdata)
692 {
693 	unsigned int queues;
694 
695 	if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
696 		int ac;
697 
698 		queues = 0;
699 
700 		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
701 			queues |= BIT(sdata->vif.hw_queue[ac]);
702 		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
703 			queues |= BIT(sdata->vif.cab_queue);
704 	} else {
705 		/* all queues */
706 		queues = BIT(local->hw.queues) - 1;
707 	}
708 
709 	return queues;
710 }
711 
__ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,unsigned int queues,bool drop)712 void __ieee80211_flush_queues(struct ieee80211_local *local,
713 			      struct ieee80211_sub_if_data *sdata,
714 			      unsigned int queues, bool drop)
715 {
716 	if (!local->ops->flush)
717 		return;
718 
719 	/*
720 	 * If no queue was set, or if the HW doesn't support
721 	 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
722 	 */
723 	if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
724 		queues = ieee80211_get_vif_queues(local, sdata);
725 
726 	ieee80211_stop_queues_by_reason(&local->hw, queues,
727 					IEEE80211_QUEUE_STOP_REASON_FLUSH,
728 					false);
729 
730 	drv_flush(local, sdata, queues, drop);
731 
732 	ieee80211_wake_queues_by_reason(&local->hw, queues,
733 					IEEE80211_QUEUE_STOP_REASON_FLUSH,
734 					false);
735 }
736 
ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool drop)737 void ieee80211_flush_queues(struct ieee80211_local *local,
738 			    struct ieee80211_sub_if_data *sdata, bool drop)
739 {
740 	__ieee80211_flush_queues(local, sdata, 0, drop);
741 }
742 
ieee80211_stop_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)743 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
744 			       struct ieee80211_sub_if_data *sdata,
745 			       enum queue_stop_reason reason)
746 {
747 	ieee80211_stop_queues_by_reason(&local->hw,
748 					ieee80211_get_vif_queues(local, sdata),
749 					reason, true);
750 }
751 
ieee80211_wake_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)752 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
753 			       struct ieee80211_sub_if_data *sdata,
754 			       enum queue_stop_reason reason)
755 {
756 	ieee80211_wake_queues_by_reason(&local->hw,
757 					ieee80211_get_vif_queues(local, sdata),
758 					reason, true);
759 }
760 
__iterate_interfaces(struct ieee80211_local * local,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)761 static void __iterate_interfaces(struct ieee80211_local *local,
762 				 u32 iter_flags,
763 				 void (*iterator)(void *data, u8 *mac,
764 						  struct ieee80211_vif *vif),
765 				 void *data)
766 {
767 	struct ieee80211_sub_if_data *sdata;
768 	bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
769 
770 	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
771 		switch (sdata->vif.type) {
772 		case NL80211_IFTYPE_MONITOR:
773 			if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
774 				continue;
775 			break;
776 		case NL80211_IFTYPE_AP_VLAN:
777 			continue;
778 		default:
779 			break;
780 		}
781 		if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
782 		    active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
783 			continue;
784 		if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
785 		    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
786 			continue;
787 		if (ieee80211_sdata_running(sdata) || !active_only)
788 			iterator(data, sdata->vif.addr,
789 				 &sdata->vif);
790 	}
791 
792 	sdata = rcu_dereference_check(local->monitor_sdata,
793 				      lockdep_is_held(&local->iflist_mtx) ||
794 				      lockdep_is_held(&local->hw.wiphy->mtx));
795 	if (sdata &&
796 	    (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
797 	     sdata->flags & IEEE80211_SDATA_IN_DRIVER))
798 		iterator(data, sdata->vif.addr, &sdata->vif);
799 }
800 
ieee80211_iterate_interfaces(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)801 void ieee80211_iterate_interfaces(
802 	struct ieee80211_hw *hw, u32 iter_flags,
803 	void (*iterator)(void *data, u8 *mac,
804 			 struct ieee80211_vif *vif),
805 	void *data)
806 {
807 	struct ieee80211_local *local = hw_to_local(hw);
808 
809 	mutex_lock(&local->iflist_mtx);
810 	__iterate_interfaces(local, iter_flags, iterator, data);
811 	mutex_unlock(&local->iflist_mtx);
812 }
813 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
814 
ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)815 void ieee80211_iterate_active_interfaces_atomic(
816 	struct ieee80211_hw *hw, u32 iter_flags,
817 	void (*iterator)(void *data, u8 *mac,
818 			 struct ieee80211_vif *vif),
819 	void *data)
820 {
821 	struct ieee80211_local *local = hw_to_local(hw);
822 
823 	rcu_read_lock();
824 	__iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
825 			     iterator, data);
826 	rcu_read_unlock();
827 }
828 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
829 
ieee80211_iterate_active_interfaces_mtx(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)830 void ieee80211_iterate_active_interfaces_mtx(
831 	struct ieee80211_hw *hw, u32 iter_flags,
832 	void (*iterator)(void *data, u8 *mac,
833 			 struct ieee80211_vif *vif),
834 	void *data)
835 {
836 	struct ieee80211_local *local = hw_to_local(hw);
837 
838 	lockdep_assert_wiphy(hw->wiphy);
839 
840 	__iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
841 			     iterator, data);
842 }
843 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
844 
__iterate_stations(struct ieee80211_local * local,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)845 static void __iterate_stations(struct ieee80211_local *local,
846 			       void (*iterator)(void *data,
847 						struct ieee80211_sta *sta),
848 			       void *data)
849 {
850 	struct sta_info *sta;
851 
852 	list_for_each_entry_rcu(sta, &local->sta_list, list) {
853 		if (!sta->uploaded)
854 			continue;
855 
856 		iterator(data, &sta->sta);
857 	}
858 }
859 
ieee80211_iterate_stations(struct ieee80211_hw * hw,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)860 void ieee80211_iterate_stations(struct ieee80211_hw *hw,
861 				void (*iterator)(void *data,
862 						 struct ieee80211_sta *sta),
863 				void *data)
864 {
865 	struct ieee80211_local *local = hw_to_local(hw);
866 
867 	mutex_lock(&local->sta_mtx);
868 	__iterate_stations(local, iterator, data);
869 	mutex_unlock(&local->sta_mtx);
870 }
871 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations);
872 
ieee80211_iterate_stations_atomic(struct ieee80211_hw * hw,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)873 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
874 			void (*iterator)(void *data,
875 					 struct ieee80211_sta *sta),
876 			void *data)
877 {
878 	struct ieee80211_local *local = hw_to_local(hw);
879 
880 	rcu_read_lock();
881 	__iterate_stations(local, iterator, data);
882 	rcu_read_unlock();
883 }
884 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
885 
wdev_to_ieee80211_vif(struct wireless_dev * wdev)886 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
887 {
888 	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
889 
890 	if (!ieee80211_sdata_running(sdata) ||
891 	    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
892 		return NULL;
893 	return &sdata->vif;
894 }
895 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
896 
ieee80211_vif_to_wdev(struct ieee80211_vif * vif)897 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
898 {
899 	if (!vif)
900 		return NULL;
901 
902 	return &vif_to_sdata(vif)->wdev;
903 }
904 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
905 
906 /*
907  * Nothing should have been stuffed into the workqueue during
908  * the suspend->resume cycle. Since we can't check each caller
909  * of this function if we are already quiescing / suspended,
910  * check here and don't WARN since this can actually happen when
911  * the rx path (for example) is racing against __ieee80211_suspend
912  * and suspending / quiescing was set after the rx path checked
913  * them.
914  */
ieee80211_can_queue_work(struct ieee80211_local * local)915 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
916 {
917 	if (local->quiescing || (local->suspended && !local->resuming)) {
918 		pr_warn("queueing ieee80211 work while going to suspend\n");
919 		return false;
920 	}
921 
922 	return true;
923 }
924 
ieee80211_queue_work(struct ieee80211_hw * hw,struct work_struct * work)925 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
926 {
927 	struct ieee80211_local *local = hw_to_local(hw);
928 
929 	if (!ieee80211_can_queue_work(local))
930 		return;
931 
932 	queue_work(local->workqueue, work);
933 }
934 EXPORT_SYMBOL(ieee80211_queue_work);
935 
ieee80211_queue_delayed_work(struct ieee80211_hw * hw,struct delayed_work * dwork,unsigned long delay)936 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
937 				  struct delayed_work *dwork,
938 				  unsigned long delay)
939 {
940 	struct ieee80211_local *local = hw_to_local(hw);
941 
942 	if (!ieee80211_can_queue_work(local))
943 		return;
944 
945 	queue_delayed_work(local->workqueue, dwork, delay);
946 }
947 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
948 
949 static void
ieee80211_parse_extension_element(u32 * crc,const struct element * elem,struct ieee802_11_elems * elems,struct ieee80211_elems_parse_params * params)950 ieee80211_parse_extension_element(u32 *crc,
951 				  const struct element *elem,
952 				  struct ieee802_11_elems *elems,
953 				  struct ieee80211_elems_parse_params *params)
954 {
955 	const void *data = elem->data + 1;
956 	u8 len;
957 
958 	if (!elem->datalen)
959 		return;
960 
961 	len = elem->datalen - 1;
962 
963 	switch (elem->data[0]) {
964 	case WLAN_EID_EXT_HE_MU_EDCA:
965 		if (len >= sizeof(*elems->mu_edca_param_set)) {
966 			elems->mu_edca_param_set = data;
967 			if (crc)
968 				*crc = crc32_be(*crc, (void *)elem,
969 						elem->datalen + 2);
970 		}
971 		break;
972 	case WLAN_EID_EXT_HE_CAPABILITY:
973 		if (ieee80211_he_capa_size_ok(data, len)) {
974 			elems->he_cap = data;
975 			elems->he_cap_len = len;
976 		}
977 		break;
978 	case WLAN_EID_EXT_HE_OPERATION:
979 		if (len >= sizeof(*elems->he_operation) &&
980 		    len >= ieee80211_he_oper_size(data) - 1) {
981 			if (crc)
982 				*crc = crc32_be(*crc, (void *)elem,
983 						elem->datalen + 2);
984 			elems->he_operation = data;
985 		}
986 		break;
987 	case WLAN_EID_EXT_UORA:
988 		if (len >= 1)
989 			elems->uora_element = data;
990 		break;
991 	case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
992 		if (len == 3)
993 			elems->max_channel_switch_time = data;
994 		break;
995 	case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
996 		if (len >= sizeof(*elems->mbssid_config_ie))
997 			elems->mbssid_config_ie = data;
998 		break;
999 	case WLAN_EID_EXT_HE_SPR:
1000 		if (len >= sizeof(*elems->he_spr) &&
1001 		    len >= ieee80211_he_spr_size(data))
1002 			elems->he_spr = data;
1003 		break;
1004 	case WLAN_EID_EXT_HE_6GHZ_CAPA:
1005 		if (len >= sizeof(*elems->he_6ghz_capa))
1006 			elems->he_6ghz_capa = data;
1007 		break;
1008 	case WLAN_EID_EXT_EHT_CAPABILITY:
1009 		if (ieee80211_eht_capa_size_ok(elems->he_cap,
1010 					       data, len,
1011 					       params->from_ap)) {
1012 			elems->eht_cap = data;
1013 			elems->eht_cap_len = len;
1014 		}
1015 		break;
1016 	case WLAN_EID_EXT_EHT_OPERATION:
1017 		if (ieee80211_eht_oper_size_ok(data, len))
1018 			elems->eht_operation = data;
1019 		break;
1020 	case WLAN_EID_EXT_EHT_MULTI_LINK:
1021 		if (ieee80211_mle_size_ok(data, len))
1022 			elems->multi_link = (void *)data;
1023 		break;
1024 	}
1025 }
1026 
1027 static u32
_ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params * params,struct ieee802_11_elems * elems,const struct element * check_inherit)1028 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
1029 			     struct ieee802_11_elems *elems,
1030 			     const struct element *check_inherit)
1031 {
1032 	const struct element *elem;
1033 	bool calc_crc = params->filter != 0;
1034 	DECLARE_BITMAP(seen_elems, 256);
1035 	u32 crc = params->crc;
1036 	const u8 *ie;
1037 
1038 	bitmap_zero(seen_elems, 256);
1039 
1040 	for_each_element(elem, params->start, params->len) {
1041 		bool elem_parse_failed;
1042 		u8 id = elem->id;
1043 		u8 elen = elem->datalen;
1044 		const u8 *pos = elem->data;
1045 
1046 		if (check_inherit &&
1047 		    !cfg80211_is_element_inherited(elem,
1048 						   check_inherit))
1049 			continue;
1050 
1051 		switch (id) {
1052 		case WLAN_EID_SSID:
1053 		case WLAN_EID_SUPP_RATES:
1054 		case WLAN_EID_FH_PARAMS:
1055 		case WLAN_EID_DS_PARAMS:
1056 		case WLAN_EID_CF_PARAMS:
1057 		case WLAN_EID_TIM:
1058 		case WLAN_EID_IBSS_PARAMS:
1059 		case WLAN_EID_CHALLENGE:
1060 		case WLAN_EID_RSN:
1061 		case WLAN_EID_ERP_INFO:
1062 		case WLAN_EID_EXT_SUPP_RATES:
1063 		case WLAN_EID_HT_CAPABILITY:
1064 		case WLAN_EID_HT_OPERATION:
1065 		case WLAN_EID_VHT_CAPABILITY:
1066 		case WLAN_EID_VHT_OPERATION:
1067 		case WLAN_EID_MESH_ID:
1068 		case WLAN_EID_MESH_CONFIG:
1069 		case WLAN_EID_PEER_MGMT:
1070 		case WLAN_EID_PREQ:
1071 		case WLAN_EID_PREP:
1072 		case WLAN_EID_PERR:
1073 		case WLAN_EID_RANN:
1074 		case WLAN_EID_CHANNEL_SWITCH:
1075 		case WLAN_EID_EXT_CHANSWITCH_ANN:
1076 		case WLAN_EID_COUNTRY:
1077 		case WLAN_EID_PWR_CONSTRAINT:
1078 		case WLAN_EID_TIMEOUT_INTERVAL:
1079 		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1080 		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1081 		case WLAN_EID_CHAN_SWITCH_PARAM:
1082 		case WLAN_EID_EXT_CAPABILITY:
1083 		case WLAN_EID_CHAN_SWITCH_TIMING:
1084 		case WLAN_EID_LINK_ID:
1085 		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1086 		case WLAN_EID_RSNX:
1087 		case WLAN_EID_S1G_BCN_COMPAT:
1088 		case WLAN_EID_S1G_CAPABILITIES:
1089 		case WLAN_EID_S1G_OPERATION:
1090 		case WLAN_EID_AID_RESPONSE:
1091 		case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1092 		/*
1093 		 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1094 		 * that if the content gets bigger it might be needed more than once
1095 		 */
1096 			if (test_bit(id, seen_elems)) {
1097 				elems->parse_error = true;
1098 				continue;
1099 			}
1100 			break;
1101 		}
1102 
1103 		if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1104 			crc = crc32_be(crc, pos - 2, elen + 2);
1105 
1106 		elem_parse_failed = false;
1107 
1108 		switch (id) {
1109 		case WLAN_EID_LINK_ID:
1110 			if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1111 				elem_parse_failed = true;
1112 				break;
1113 			}
1114 			elems->lnk_id = (void *)(pos - 2);
1115 			break;
1116 		case WLAN_EID_CHAN_SWITCH_TIMING:
1117 			if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1118 				elem_parse_failed = true;
1119 				break;
1120 			}
1121 			elems->ch_sw_timing = (void *)pos;
1122 			break;
1123 		case WLAN_EID_EXT_CAPABILITY:
1124 			elems->ext_capab = pos;
1125 			elems->ext_capab_len = elen;
1126 			break;
1127 		case WLAN_EID_SSID:
1128 			elems->ssid = pos;
1129 			elems->ssid_len = elen;
1130 			break;
1131 		case WLAN_EID_SUPP_RATES:
1132 			elems->supp_rates = pos;
1133 			elems->supp_rates_len = elen;
1134 			break;
1135 		case WLAN_EID_DS_PARAMS:
1136 			if (elen >= 1)
1137 				elems->ds_params = pos;
1138 			else
1139 				elem_parse_failed = true;
1140 			break;
1141 		case WLAN_EID_TIM:
1142 			if (elen >= sizeof(struct ieee80211_tim_ie)) {
1143 				elems->tim = (void *)pos;
1144 				elems->tim_len = elen;
1145 			} else
1146 				elem_parse_failed = true;
1147 			break;
1148 		case WLAN_EID_VENDOR_SPECIFIC:
1149 			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1150 			    pos[2] == 0xf2) {
1151 				/* Microsoft OUI (00:50:F2) */
1152 
1153 				if (calc_crc)
1154 					crc = crc32_be(crc, pos - 2, elen + 2);
1155 
1156 				if (elen >= 5 && pos[3] == 2) {
1157 					/* OUI Type 2 - WMM IE */
1158 					if (pos[4] == 0) {
1159 						elems->wmm_info = pos;
1160 						elems->wmm_info_len = elen;
1161 					} else if (pos[4] == 1) {
1162 						elems->wmm_param = pos;
1163 						elems->wmm_param_len = elen;
1164 					}
1165 				}
1166 			}
1167 			break;
1168 		case WLAN_EID_RSN:
1169 			elems->rsn = pos;
1170 			elems->rsn_len = elen;
1171 			break;
1172 		case WLAN_EID_ERP_INFO:
1173 			if (elen >= 1)
1174 				elems->erp_info = pos;
1175 			else
1176 				elem_parse_failed = true;
1177 			break;
1178 		case WLAN_EID_EXT_SUPP_RATES:
1179 			elems->ext_supp_rates = pos;
1180 			elems->ext_supp_rates_len = elen;
1181 			break;
1182 		case WLAN_EID_HT_CAPABILITY:
1183 			if (elen >= sizeof(struct ieee80211_ht_cap))
1184 				elems->ht_cap_elem = (void *)pos;
1185 			else
1186 				elem_parse_failed = true;
1187 			break;
1188 		case WLAN_EID_HT_OPERATION:
1189 			if (elen >= sizeof(struct ieee80211_ht_operation))
1190 				elems->ht_operation = (void *)pos;
1191 			else
1192 				elem_parse_failed = true;
1193 			break;
1194 		case WLAN_EID_VHT_CAPABILITY:
1195 			if (elen >= sizeof(struct ieee80211_vht_cap))
1196 				elems->vht_cap_elem = (void *)pos;
1197 			else
1198 				elem_parse_failed = true;
1199 			break;
1200 		case WLAN_EID_VHT_OPERATION:
1201 			if (elen >= sizeof(struct ieee80211_vht_operation)) {
1202 				elems->vht_operation = (void *)pos;
1203 				if (calc_crc)
1204 					crc = crc32_be(crc, pos - 2, elen + 2);
1205 				break;
1206 			}
1207 			elem_parse_failed = true;
1208 			break;
1209 		case WLAN_EID_OPMODE_NOTIF:
1210 			if (elen > 0) {
1211 				elems->opmode_notif = pos;
1212 				if (calc_crc)
1213 					crc = crc32_be(crc, pos - 2, elen + 2);
1214 				break;
1215 			}
1216 			elem_parse_failed = true;
1217 			break;
1218 		case WLAN_EID_MESH_ID:
1219 			elems->mesh_id = pos;
1220 			elems->mesh_id_len = elen;
1221 			break;
1222 		case WLAN_EID_MESH_CONFIG:
1223 			if (elen >= sizeof(struct ieee80211_meshconf_ie))
1224 				elems->mesh_config = (void *)pos;
1225 			else
1226 				elem_parse_failed = true;
1227 			break;
1228 		case WLAN_EID_PEER_MGMT:
1229 			elems->peering = pos;
1230 			elems->peering_len = elen;
1231 			break;
1232 		case WLAN_EID_MESH_AWAKE_WINDOW:
1233 			if (elen >= 2)
1234 				elems->awake_window = (void *)pos;
1235 			break;
1236 		case WLAN_EID_PREQ:
1237 			elems->preq = pos;
1238 			elems->preq_len = elen;
1239 			break;
1240 		case WLAN_EID_PREP:
1241 			elems->prep = pos;
1242 			elems->prep_len = elen;
1243 			break;
1244 		case WLAN_EID_PERR:
1245 			elems->perr = pos;
1246 			elems->perr_len = elen;
1247 			break;
1248 		case WLAN_EID_RANN:
1249 			if (elen >= sizeof(struct ieee80211_rann_ie))
1250 				elems->rann = (void *)pos;
1251 			else
1252 				elem_parse_failed = true;
1253 			break;
1254 		case WLAN_EID_CHANNEL_SWITCH:
1255 			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1256 				elem_parse_failed = true;
1257 				break;
1258 			}
1259 			elems->ch_switch_ie = (void *)pos;
1260 			break;
1261 		case WLAN_EID_EXT_CHANSWITCH_ANN:
1262 			if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1263 				elem_parse_failed = true;
1264 				break;
1265 			}
1266 			elems->ext_chansw_ie = (void *)pos;
1267 			break;
1268 		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1269 			if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1270 				elem_parse_failed = true;
1271 				break;
1272 			}
1273 			elems->sec_chan_offs = (void *)pos;
1274 			break;
1275 		case WLAN_EID_CHAN_SWITCH_PARAM:
1276 			if (elen <
1277 			    sizeof(*elems->mesh_chansw_params_ie)) {
1278 				elem_parse_failed = true;
1279 				break;
1280 			}
1281 			elems->mesh_chansw_params_ie = (void *)pos;
1282 			break;
1283 		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1284 			if (!params->action ||
1285 			    elen < sizeof(*elems->wide_bw_chansw_ie)) {
1286 				elem_parse_failed = true;
1287 				break;
1288 			}
1289 			elems->wide_bw_chansw_ie = (void *)pos;
1290 			break;
1291 		case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1292 			if (params->action) {
1293 				elem_parse_failed = true;
1294 				break;
1295 			}
1296 			/*
1297 			 * This is a bit tricky, but as we only care about
1298 			 * the wide bandwidth channel switch element, so
1299 			 * just parse it out manually.
1300 			 */
1301 			ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1302 					      pos, elen);
1303 			if (ie) {
1304 				if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1305 					elems->wide_bw_chansw_ie =
1306 						(void *)(ie + 2);
1307 				else
1308 					elem_parse_failed = true;
1309 			}
1310 			break;
1311 		case WLAN_EID_COUNTRY:
1312 			elems->country_elem = pos;
1313 			elems->country_elem_len = elen;
1314 			break;
1315 		case WLAN_EID_PWR_CONSTRAINT:
1316 			if (elen != 1) {
1317 				elem_parse_failed = true;
1318 				break;
1319 			}
1320 			elems->pwr_constr_elem = pos;
1321 			break;
1322 		case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1323 			/* Lots of different options exist, but we only care
1324 			 * about the Dynamic Transmit Power Control element.
1325 			 * First check for the Cisco OUI, then for the DTPC
1326 			 * tag (0x00).
1327 			 */
1328 			if (elen < 4) {
1329 				elem_parse_failed = true;
1330 				break;
1331 			}
1332 
1333 			if (pos[0] != 0x00 || pos[1] != 0x40 ||
1334 			    pos[2] != 0x96 || pos[3] != 0x00)
1335 				break;
1336 
1337 			if (elen != 6) {
1338 				elem_parse_failed = true;
1339 				break;
1340 			}
1341 
1342 			if (calc_crc)
1343 				crc = crc32_be(crc, pos - 2, elen + 2);
1344 
1345 			elems->cisco_dtpc_elem = pos;
1346 			break;
1347 		case WLAN_EID_ADDBA_EXT:
1348 			if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1349 				elem_parse_failed = true;
1350 				break;
1351 			}
1352 			elems->addba_ext_ie = (void *)pos;
1353 			break;
1354 		case WLAN_EID_TIMEOUT_INTERVAL:
1355 			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1356 				elems->timeout_int = (void *)pos;
1357 			else
1358 				elem_parse_failed = true;
1359 			break;
1360 		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1361 			if (elen >= sizeof(*elems->max_idle_period_ie))
1362 				elems->max_idle_period_ie = (void *)pos;
1363 			break;
1364 		case WLAN_EID_RSNX:
1365 			elems->rsnx = pos;
1366 			elems->rsnx_len = elen;
1367 			break;
1368 		case WLAN_EID_TX_POWER_ENVELOPE:
1369 			if (elen < 1 ||
1370 			    elen > sizeof(struct ieee80211_tx_pwr_env))
1371 				break;
1372 
1373 			if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1374 				break;
1375 
1376 			elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1377 			elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1378 			elems->tx_pwr_env_num++;
1379 			break;
1380 		case WLAN_EID_EXTENSION:
1381 			ieee80211_parse_extension_element(calc_crc ?
1382 								&crc : NULL,
1383 							  elem, elems, params);
1384 			break;
1385 		case WLAN_EID_S1G_CAPABILITIES:
1386 			if (elen >= sizeof(*elems->s1g_capab))
1387 				elems->s1g_capab = (void *)pos;
1388 			else
1389 				elem_parse_failed = true;
1390 			break;
1391 		case WLAN_EID_S1G_OPERATION:
1392 			if (elen == sizeof(*elems->s1g_oper))
1393 				elems->s1g_oper = (void *)pos;
1394 			else
1395 				elem_parse_failed = true;
1396 			break;
1397 		case WLAN_EID_S1G_BCN_COMPAT:
1398 			if (elen == sizeof(*elems->s1g_bcn_compat))
1399 				elems->s1g_bcn_compat = (void *)pos;
1400 			else
1401 				elem_parse_failed = true;
1402 			break;
1403 		case WLAN_EID_AID_RESPONSE:
1404 			if (elen == sizeof(struct ieee80211_aid_response_ie))
1405 				elems->aid_resp = (void *)pos;
1406 			else
1407 				elem_parse_failed = true;
1408 			break;
1409 		default:
1410 			break;
1411 		}
1412 
1413 		if (elem_parse_failed)
1414 			elems->parse_error = true;
1415 		else
1416 			__set_bit(id, seen_elems);
1417 	}
1418 
1419 	if (!for_each_element_completed(elem, params->start, params->len))
1420 		elems->parse_error = true;
1421 
1422 	return crc;
1423 }
1424 
ieee802_11_find_bssid_profile(const u8 * start,size_t len,struct ieee802_11_elems * elems,struct cfg80211_bss * bss,u8 * nontransmitted_profile)1425 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1426 					    struct ieee802_11_elems *elems,
1427 					    struct cfg80211_bss *bss,
1428 					    u8 *nontransmitted_profile)
1429 {
1430 	const struct element *elem, *sub;
1431 	size_t profile_len = 0;
1432 	bool found = false;
1433 
1434 	if (!bss || !bss->transmitted_bss)
1435 		return profile_len;
1436 
1437 	for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1438 		if (elem->datalen < 2)
1439 			continue;
1440 		if (elem->data[0] < 1 || elem->data[0] > 8)
1441 			continue;
1442 
1443 		for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1444 			u8 new_bssid[ETH_ALEN];
1445 			const u8 *index;
1446 
1447 			if (sub->id != 0 || sub->datalen < 4) {
1448 				/* not a valid BSS profile */
1449 				continue;
1450 			}
1451 
1452 			if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1453 			    sub->data[1] != 2) {
1454 				/* The first element of the
1455 				 * Nontransmitted BSSID Profile is not
1456 				 * the Nontransmitted BSSID Capability
1457 				 * element.
1458 				 */
1459 				continue;
1460 			}
1461 
1462 			memset(nontransmitted_profile, 0, len);
1463 			profile_len = cfg80211_merge_profile(start, len,
1464 							     elem,
1465 							     sub,
1466 							     nontransmitted_profile,
1467 							     len);
1468 
1469 			/* found a Nontransmitted BSSID Profile */
1470 			index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1471 						 nontransmitted_profile,
1472 						 profile_len);
1473 			if (!index || index[1] < 1 || index[2] == 0) {
1474 				/* Invalid MBSSID Index element */
1475 				continue;
1476 			}
1477 
1478 			cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1479 					       elem->data[0],
1480 					       index[2],
1481 					       new_bssid);
1482 			if (ether_addr_equal(new_bssid, bss->bssid)) {
1483 				found = true;
1484 				elems->bssid_index_len = index[1];
1485 				elems->bssid_index = (void *)&index[2];
1486 				break;
1487 			}
1488 		}
1489 	}
1490 
1491 	return found ? profile_len : 0;
1492 }
1493 
1494 struct ieee802_11_elems *
ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params * params)1495 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1496 {
1497 	struct ieee802_11_elems *elems;
1498 	const struct element *non_inherit = NULL;
1499 	u8 *nontransmitted_profile;
1500 	int nontransmitted_profile_len = 0;
1501 	size_t scratch_len = params->len;
1502 
1503 	elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC);
1504 	if (!elems)
1505 		return NULL;
1506 	elems->ie_start = params->start;
1507 	elems->total_len = params->len;
1508 	elems->scratch_len = scratch_len;
1509 	elems->scratch_pos = elems->scratch;
1510 
1511 	nontransmitted_profile = elems->scratch_pos;
1512 	nontransmitted_profile_len =
1513 		ieee802_11_find_bssid_profile(params->start, params->len,
1514 					      elems, params->bss,
1515 					      nontransmitted_profile);
1516 	elems->scratch_pos += nontransmitted_profile_len;
1517 	elems->scratch_len -= nontransmitted_profile_len;
1518 	non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1519 					     nontransmitted_profile,
1520 					     nontransmitted_profile_len);
1521 
1522 	elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1523 
1524 	/* Override with nontransmitted profile, if found */
1525 	if (nontransmitted_profile_len) {
1526 		struct ieee80211_elems_parse_params sub = {
1527 			.start = nontransmitted_profile,
1528 			.len = nontransmitted_profile_len,
1529 			.action = params->action,
1530 			.link_id = params->link_id,
1531 		};
1532 
1533 		_ieee802_11_parse_elems_full(&sub, elems, NULL);
1534 	}
1535 
1536 	if (elems->tim && !elems->parse_error) {
1537 		const struct ieee80211_tim_ie *tim_ie = elems->tim;
1538 
1539 		elems->dtim_period = tim_ie->dtim_period;
1540 		elems->dtim_count = tim_ie->dtim_count;
1541 	}
1542 
1543 	/* Override DTIM period and count if needed */
1544 	if (elems->bssid_index &&
1545 	    elems->bssid_index_len >=
1546 	    offsetofend(struct ieee80211_bssid_index, dtim_period))
1547 		elems->dtim_period = elems->bssid_index->dtim_period;
1548 
1549 	if (elems->bssid_index &&
1550 	    elems->bssid_index_len >=
1551 	    offsetofend(struct ieee80211_bssid_index, dtim_count))
1552 		elems->dtim_count = elems->bssid_index->dtim_count;
1553 
1554 	return elems;
1555 }
1556 
ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data * sdata,struct ieee80211_tx_queue_params * qparam,int ac)1557 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1558 					   struct ieee80211_tx_queue_params
1559 					   *qparam, int ac)
1560 {
1561 	struct ieee80211_chanctx_conf *chanctx_conf;
1562 	const struct ieee80211_reg_rule *rrule;
1563 	const struct ieee80211_wmm_ac *wmm_ac;
1564 	u16 center_freq = 0;
1565 
1566 	if (sdata->vif.type != NL80211_IFTYPE_AP &&
1567 	    sdata->vif.type != NL80211_IFTYPE_STATION)
1568 		return;
1569 
1570 	rcu_read_lock();
1571 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1572 	if (chanctx_conf)
1573 		center_freq = chanctx_conf->def.chan->center_freq;
1574 
1575 	if (!center_freq) {
1576 		rcu_read_unlock();
1577 		return;
1578 	}
1579 
1580 	rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1581 
1582 	if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1583 		rcu_read_unlock();
1584 		return;
1585 	}
1586 
1587 	if (sdata->vif.type == NL80211_IFTYPE_AP)
1588 		wmm_ac = &rrule->wmm_rule.ap[ac];
1589 	else
1590 		wmm_ac = &rrule->wmm_rule.client[ac];
1591 	qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1592 	qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1593 	qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1594 	qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1595 	rcu_read_unlock();
1596 }
1597 
ieee80211_set_wmm_default(struct ieee80211_link_data * link,bool bss_notify,bool enable_qos)1598 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1599 			       bool bss_notify, bool enable_qos)
1600 {
1601 	struct ieee80211_sub_if_data *sdata = link->sdata;
1602 	struct ieee80211_local *local = sdata->local;
1603 	struct ieee80211_tx_queue_params qparam;
1604 	struct ieee80211_chanctx_conf *chanctx_conf;
1605 	int ac;
1606 	bool use_11b;
1607 	bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1608 	int aCWmin, aCWmax;
1609 
1610 	if (!local->ops->conf_tx)
1611 		return;
1612 
1613 	if (local->hw.queues < IEEE80211_NUM_ACS)
1614 		return;
1615 
1616 	memset(&qparam, 0, sizeof(qparam));
1617 
1618 	rcu_read_lock();
1619 	chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1620 	use_11b = (chanctx_conf &&
1621 		   chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1622 		 !link->operating_11g_mode;
1623 	rcu_read_unlock();
1624 
1625 	is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1626 
1627 	/* Set defaults according to 802.11-2007 Table 7-37 */
1628 	aCWmax = 1023;
1629 	if (use_11b)
1630 		aCWmin = 31;
1631 	else
1632 		aCWmin = 15;
1633 
1634 	/* Confiure old 802.11b/g medium access rules. */
1635 	qparam.cw_max = aCWmax;
1636 	qparam.cw_min = aCWmin;
1637 	qparam.txop = 0;
1638 	qparam.aifs = 2;
1639 
1640 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1641 		/* Update if QoS is enabled. */
1642 		if (enable_qos) {
1643 			switch (ac) {
1644 			case IEEE80211_AC_BK:
1645 				qparam.cw_max = aCWmax;
1646 				qparam.cw_min = aCWmin;
1647 				qparam.txop = 0;
1648 				if (is_ocb)
1649 					qparam.aifs = 9;
1650 				else
1651 					qparam.aifs = 7;
1652 				break;
1653 			/* never happens but let's not leave undefined */
1654 			default:
1655 			case IEEE80211_AC_BE:
1656 				qparam.cw_max = aCWmax;
1657 				qparam.cw_min = aCWmin;
1658 				qparam.txop = 0;
1659 				if (is_ocb)
1660 					qparam.aifs = 6;
1661 				else
1662 					qparam.aifs = 3;
1663 				break;
1664 			case IEEE80211_AC_VI:
1665 				qparam.cw_max = aCWmin;
1666 				qparam.cw_min = (aCWmin + 1) / 2 - 1;
1667 				if (is_ocb)
1668 					qparam.txop = 0;
1669 				else if (use_11b)
1670 					qparam.txop = 6016/32;
1671 				else
1672 					qparam.txop = 3008/32;
1673 
1674 				if (is_ocb)
1675 					qparam.aifs = 3;
1676 				else
1677 					qparam.aifs = 2;
1678 				break;
1679 			case IEEE80211_AC_VO:
1680 				qparam.cw_max = (aCWmin + 1) / 2 - 1;
1681 				qparam.cw_min = (aCWmin + 1) / 4 - 1;
1682 				if (is_ocb)
1683 					qparam.txop = 0;
1684 				else if (use_11b)
1685 					qparam.txop = 3264/32;
1686 				else
1687 					qparam.txop = 1504/32;
1688 				qparam.aifs = 2;
1689 				break;
1690 			}
1691 		}
1692 		ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1693 
1694 		qparam.uapsd = false;
1695 
1696 		link->tx_conf[ac] = qparam;
1697 		drv_conf_tx(local, link, ac, &qparam);
1698 	}
1699 
1700 	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1701 	    sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1702 	    sdata->vif.type != NL80211_IFTYPE_NAN) {
1703 		link->conf->qos = enable_qos;
1704 		if (bss_notify)
1705 			ieee80211_link_info_change_notify(sdata, link,
1706 							  BSS_CHANGED_QOS);
1707 	}
1708 }
1709 
ieee80211_send_auth(struct ieee80211_sub_if_data * sdata,u16 transaction,u16 auth_alg,u16 status,const u8 * extra,size_t extra_len,const u8 * da,const u8 * bssid,const u8 * key,u8 key_len,u8 key_idx,u32 tx_flags)1710 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1711 			 u16 transaction, u16 auth_alg, u16 status,
1712 			 const u8 *extra, size_t extra_len, const u8 *da,
1713 			 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1714 			 u32 tx_flags)
1715 {
1716 	struct ieee80211_local *local = sdata->local;
1717 	struct sk_buff *skb;
1718 	struct ieee80211_mgmt *mgmt;
1719 	bool multi_link = sdata->vif.valid_links;
1720 	struct {
1721 		u8 id;
1722 		u8 len;
1723 		u8 ext_id;
1724 		struct ieee80211_multi_link_elem ml;
1725 		struct ieee80211_mle_basic_common_info basic;
1726 	} __packed mle = {
1727 		.id = WLAN_EID_EXTENSION,
1728 		.len = sizeof(mle) - 2,
1729 		.ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1730 		.ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1731 		.basic.len = sizeof(mle.basic),
1732 	};
1733 	int err;
1734 
1735 	memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1736 
1737 	/* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1738 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1739 			    24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1740 			    multi_link * sizeof(mle));
1741 	if (!skb)
1742 		return;
1743 
1744 	skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1745 
1746 	mgmt = skb_put_zero(skb, 24 + 6);
1747 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1748 					  IEEE80211_STYPE_AUTH);
1749 	memcpy(mgmt->da, da, ETH_ALEN);
1750 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1751 	memcpy(mgmt->bssid, bssid, ETH_ALEN);
1752 	mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1753 	mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1754 	mgmt->u.auth.status_code = cpu_to_le16(status);
1755 	if (extra)
1756 		skb_put_data(skb, extra, extra_len);
1757 	if (multi_link)
1758 		skb_put_data(skb, &mle, sizeof(mle));
1759 
1760 	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1761 		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1762 		err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1763 		if (WARN_ON(err)) {
1764 			kfree_skb(skb);
1765 			return;
1766 		}
1767 	}
1768 
1769 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1770 					tx_flags;
1771 	ieee80211_tx_skb(sdata, skb);
1772 }
1773 
ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data * sdata,const u8 * da,const u8 * bssid,u16 stype,u16 reason,bool send_frame,u8 * frame_buf)1774 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1775 				    const u8 *da, const u8 *bssid,
1776 				    u16 stype, u16 reason,
1777 				    bool send_frame, u8 *frame_buf)
1778 {
1779 	struct ieee80211_local *local = sdata->local;
1780 	struct sk_buff *skb;
1781 	struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1782 
1783 	/* build frame */
1784 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1785 	mgmt->duration = 0; /* initialize only */
1786 	mgmt->seq_ctrl = 0; /* initialize only */
1787 	memcpy(mgmt->da, da, ETH_ALEN);
1788 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1789 	memcpy(mgmt->bssid, bssid, ETH_ALEN);
1790 	/* u.deauth.reason_code == u.disassoc.reason_code */
1791 	mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1792 
1793 	if (send_frame) {
1794 		skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1795 				    IEEE80211_DEAUTH_FRAME_LEN);
1796 		if (!skb)
1797 			return;
1798 
1799 		skb_reserve(skb, local->hw.extra_tx_headroom);
1800 
1801 		/* copy in frame */
1802 		skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1803 
1804 		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1805 		    !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1806 			IEEE80211_SKB_CB(skb)->flags |=
1807 				IEEE80211_TX_INTFL_DONT_ENCRYPT;
1808 
1809 		ieee80211_tx_skb(sdata, skb);
1810 	}
1811 }
1812 
ieee80211_write_he_6ghz_cap(u8 * pos,__le16 cap,u8 * end)1813 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1814 {
1815 	if ((end - pos) < 5)
1816 		return pos;
1817 
1818 	*pos++ = WLAN_EID_EXTENSION;
1819 	*pos++ = 1 + sizeof(cap);
1820 	*pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1821 	memcpy(pos, &cap, sizeof(cap));
1822 
1823 	return pos + 2;
1824 }
1825 
ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data * sdata,u8 * buffer,size_t buffer_len,const u8 * ie,size_t ie_len,enum nl80211_band band,u32 rate_mask,struct cfg80211_chan_def * chandef,size_t * offset,u32 flags)1826 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1827 					 u8 *buffer, size_t buffer_len,
1828 					 const u8 *ie, size_t ie_len,
1829 					 enum nl80211_band band,
1830 					 u32 rate_mask,
1831 					 struct cfg80211_chan_def *chandef,
1832 					 size_t *offset, u32 flags)
1833 {
1834 	struct ieee80211_local *local = sdata->local;
1835 	struct ieee80211_supported_band *sband;
1836 	const struct ieee80211_sta_he_cap *he_cap;
1837 	const struct ieee80211_sta_eht_cap *eht_cap;
1838 	u8 *pos = buffer, *end = buffer + buffer_len;
1839 	size_t noffset;
1840 	int supp_rates_len, i;
1841 	u8 rates[32];
1842 	int num_rates;
1843 	int ext_rates_len;
1844 	int shift;
1845 	u32 rate_flags;
1846 	bool have_80mhz = false;
1847 
1848 	*offset = 0;
1849 
1850 	sband = local->hw.wiphy->bands[band];
1851 	if (WARN_ON_ONCE(!sband))
1852 		return 0;
1853 
1854 	rate_flags = ieee80211_chandef_rate_flags(chandef);
1855 	shift = ieee80211_chandef_get_shift(chandef);
1856 
1857 	num_rates = 0;
1858 	for (i = 0; i < sband->n_bitrates; i++) {
1859 		if ((BIT(i) & rate_mask) == 0)
1860 			continue; /* skip rate */
1861 		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1862 			continue;
1863 
1864 		rates[num_rates++] =
1865 			(u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1866 					  (1 << shift) * 5);
1867 	}
1868 
1869 	supp_rates_len = min_t(int, num_rates, 8);
1870 
1871 	if (end - pos < 2 + supp_rates_len)
1872 		goto out_err;
1873 	*pos++ = WLAN_EID_SUPP_RATES;
1874 	*pos++ = supp_rates_len;
1875 	memcpy(pos, rates, supp_rates_len);
1876 	pos += supp_rates_len;
1877 
1878 	/* insert "request information" if in custom IEs */
1879 	if (ie && ie_len) {
1880 		static const u8 before_extrates[] = {
1881 			WLAN_EID_SSID,
1882 			WLAN_EID_SUPP_RATES,
1883 			WLAN_EID_REQUEST,
1884 		};
1885 		noffset = ieee80211_ie_split(ie, ie_len,
1886 					     before_extrates,
1887 					     ARRAY_SIZE(before_extrates),
1888 					     *offset);
1889 		if (end - pos < noffset - *offset)
1890 			goto out_err;
1891 		memcpy(pos, ie + *offset, noffset - *offset);
1892 		pos += noffset - *offset;
1893 		*offset = noffset;
1894 	}
1895 
1896 	ext_rates_len = num_rates - supp_rates_len;
1897 	if (ext_rates_len > 0) {
1898 		if (end - pos < 2 + ext_rates_len)
1899 			goto out_err;
1900 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
1901 		*pos++ = ext_rates_len;
1902 		memcpy(pos, rates + supp_rates_len, ext_rates_len);
1903 		pos += ext_rates_len;
1904 	}
1905 
1906 	if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1907 		if (end - pos < 3)
1908 			goto out_err;
1909 		*pos++ = WLAN_EID_DS_PARAMS;
1910 		*pos++ = 1;
1911 		*pos++ = ieee80211_frequency_to_channel(
1912 				chandef->chan->center_freq);
1913 	}
1914 
1915 	if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1916 		goto done;
1917 
1918 	/* insert custom IEs that go before HT */
1919 	if (ie && ie_len) {
1920 		static const u8 before_ht[] = {
1921 			/*
1922 			 * no need to list the ones split off already
1923 			 * (or generated here)
1924 			 */
1925 			WLAN_EID_DS_PARAMS,
1926 			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1927 		};
1928 		noffset = ieee80211_ie_split(ie, ie_len,
1929 					     before_ht, ARRAY_SIZE(before_ht),
1930 					     *offset);
1931 		if (end - pos < noffset - *offset)
1932 			goto out_err;
1933 		memcpy(pos, ie + *offset, noffset - *offset);
1934 		pos += noffset - *offset;
1935 		*offset = noffset;
1936 	}
1937 
1938 	if (sband->ht_cap.ht_supported) {
1939 		if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1940 			goto out_err;
1941 		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1942 						sband->ht_cap.cap);
1943 	}
1944 
1945 	/* insert custom IEs that go before VHT */
1946 	if (ie && ie_len) {
1947 		static const u8 before_vht[] = {
1948 			/*
1949 			 * no need to list the ones split off already
1950 			 * (or generated here)
1951 			 */
1952 			WLAN_EID_BSS_COEX_2040,
1953 			WLAN_EID_EXT_CAPABILITY,
1954 			WLAN_EID_SSID_LIST,
1955 			WLAN_EID_CHANNEL_USAGE,
1956 			WLAN_EID_INTERWORKING,
1957 			WLAN_EID_MESH_ID,
1958 			/* 60 GHz (Multi-band, DMG, MMS) can't happen */
1959 		};
1960 		noffset = ieee80211_ie_split(ie, ie_len,
1961 					     before_vht, ARRAY_SIZE(before_vht),
1962 					     *offset);
1963 		if (end - pos < noffset - *offset)
1964 			goto out_err;
1965 		memcpy(pos, ie + *offset, noffset - *offset);
1966 		pos += noffset - *offset;
1967 		*offset = noffset;
1968 	}
1969 
1970 	/* Check if any channel in this sband supports at least 80 MHz */
1971 	for (i = 0; i < sband->n_channels; i++) {
1972 		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1973 						IEEE80211_CHAN_NO_80MHZ))
1974 			continue;
1975 
1976 		have_80mhz = true;
1977 		break;
1978 	}
1979 
1980 	if (sband->vht_cap.vht_supported && have_80mhz) {
1981 		if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1982 			goto out_err;
1983 		pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1984 						 sband->vht_cap.cap);
1985 	}
1986 
1987 	/* insert custom IEs that go before HE */
1988 	if (ie && ie_len) {
1989 		static const u8 before_he[] = {
1990 			/*
1991 			 * no need to list the ones split off before VHT
1992 			 * or generated here
1993 			 */
1994 			WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1995 			WLAN_EID_AP_CSN,
1996 			/* TODO: add 11ah/11aj/11ak elements */
1997 		};
1998 		noffset = ieee80211_ie_split(ie, ie_len,
1999 					     before_he, ARRAY_SIZE(before_he),
2000 					     *offset);
2001 		if (end - pos < noffset - *offset)
2002 			goto out_err;
2003 		memcpy(pos, ie + *offset, noffset - *offset);
2004 		pos += noffset - *offset;
2005 		*offset = noffset;
2006 	}
2007 
2008 	he_cap = ieee80211_get_he_iftype_cap(sband,
2009 					     ieee80211_vif_type_p2p(&sdata->vif));
2010 	if (he_cap &&
2011 	    cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2012 					 IEEE80211_CHAN_NO_HE)) {
2013 		pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2014 		if (!pos)
2015 			goto out_err;
2016 	}
2017 
2018 	eht_cap = ieee80211_get_eht_iftype_cap(sband,
2019 					       ieee80211_vif_type_p2p(&sdata->vif));
2020 
2021 	if (eht_cap &&
2022 	    cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2023 					 IEEE80211_CHAN_NO_HE |
2024 					 IEEE80211_CHAN_NO_EHT)) {
2025 		pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end,
2026 						 sdata->vif.type == NL80211_IFTYPE_AP);
2027 		if (!pos)
2028 			goto out_err;
2029 	}
2030 
2031 	if (cfg80211_any_usable_channels(local->hw.wiphy,
2032 					 BIT(NL80211_BAND_6GHZ),
2033 					 IEEE80211_CHAN_NO_HE)) {
2034 		struct ieee80211_supported_band *sband6;
2035 
2036 		sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2037 		he_cap = ieee80211_get_he_iftype_cap(sband6,
2038 				ieee80211_vif_type_p2p(&sdata->vif));
2039 
2040 		if (he_cap) {
2041 			enum nl80211_iftype iftype =
2042 				ieee80211_vif_type_p2p(&sdata->vif);
2043 			__le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype);
2044 
2045 			pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2046 		}
2047 	}
2048 
2049 	/*
2050 	 * If adding more here, adjust code in main.c
2051 	 * that calculates local->scan_ies_len.
2052 	 */
2053 
2054 	return pos - buffer;
2055  out_err:
2056 	WARN_ONCE(1, "not enough space for preq IEs\n");
2057  done:
2058 	return pos - buffer;
2059 }
2060 
ieee80211_build_preq_ies(struct ieee80211_sub_if_data * sdata,u8 * buffer,size_t buffer_len,struct ieee80211_scan_ies * ie_desc,const u8 * ie,size_t ie_len,u8 bands_used,u32 * rate_masks,struct cfg80211_chan_def * chandef,u32 flags)2061 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2062 			     size_t buffer_len,
2063 			     struct ieee80211_scan_ies *ie_desc,
2064 			     const u8 *ie, size_t ie_len,
2065 			     u8 bands_used, u32 *rate_masks,
2066 			     struct cfg80211_chan_def *chandef,
2067 			     u32 flags)
2068 {
2069 	size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2070 	int i;
2071 
2072 	memset(ie_desc, 0, sizeof(*ie_desc));
2073 
2074 	for (i = 0; i < NUM_NL80211_BANDS; i++) {
2075 		if (bands_used & BIT(i)) {
2076 			pos += ieee80211_build_preq_ies_band(sdata,
2077 							     buffer + pos,
2078 							     buffer_len - pos,
2079 							     ie, ie_len, i,
2080 							     rate_masks[i],
2081 							     chandef,
2082 							     &custom_ie_offset,
2083 							     flags);
2084 			ie_desc->ies[i] = buffer + old_pos;
2085 			ie_desc->len[i] = pos - old_pos;
2086 			old_pos = pos;
2087 		}
2088 	}
2089 
2090 	/* add any remaining custom IEs */
2091 	if (ie && ie_len) {
2092 		if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2093 			      "not enough space for preq custom IEs\n"))
2094 			return pos;
2095 		memcpy(buffer + pos, ie + custom_ie_offset,
2096 		       ie_len - custom_ie_offset);
2097 		ie_desc->common_ies = buffer + pos;
2098 		ie_desc->common_ie_len = ie_len - custom_ie_offset;
2099 		pos += ie_len - custom_ie_offset;
2100 	}
2101 
2102 	return pos;
2103 };
2104 
ieee80211_build_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,u32 ratemask,struct ieee80211_channel * chan,const u8 * ssid,size_t ssid_len,const u8 * ie,size_t ie_len,u32 flags)2105 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2106 					  const u8 *src, const u8 *dst,
2107 					  u32 ratemask,
2108 					  struct ieee80211_channel *chan,
2109 					  const u8 *ssid, size_t ssid_len,
2110 					  const u8 *ie, size_t ie_len,
2111 					  u32 flags)
2112 {
2113 	struct ieee80211_local *local = sdata->local;
2114 	struct cfg80211_chan_def chandef;
2115 	struct sk_buff *skb;
2116 	struct ieee80211_mgmt *mgmt;
2117 	int ies_len;
2118 	u32 rate_masks[NUM_NL80211_BANDS] = {};
2119 	struct ieee80211_scan_ies dummy_ie_desc;
2120 
2121 	/*
2122 	 * Do not send DS Channel parameter for directed probe requests
2123 	 * in order to maximize the chance that we get a response.  Some
2124 	 * badly-behaved APs don't respond when this parameter is included.
2125 	 */
2126 	chandef.width = sdata->vif.bss_conf.chandef.width;
2127 	if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2128 		chandef.chan = NULL;
2129 	else
2130 		chandef.chan = chan;
2131 
2132 	skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2133 				     local->scan_ies_len + ie_len);
2134 	if (!skb)
2135 		return NULL;
2136 
2137 	rate_masks[chan->band] = ratemask;
2138 	ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2139 					   skb_tailroom(skb), &dummy_ie_desc,
2140 					   ie, ie_len, BIT(chan->band),
2141 					   rate_masks, &chandef, flags);
2142 	skb_put(skb, ies_len);
2143 
2144 	if (dst) {
2145 		mgmt = (struct ieee80211_mgmt *) skb->data;
2146 		memcpy(mgmt->da, dst, ETH_ALEN);
2147 		memcpy(mgmt->bssid, dst, ETH_ALEN);
2148 	}
2149 
2150 	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2151 
2152 	return skb;
2153 }
2154 
ieee80211_sta_get_rates(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,enum nl80211_band band,u32 * basic_rates)2155 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2156 			    struct ieee802_11_elems *elems,
2157 			    enum nl80211_band band, u32 *basic_rates)
2158 {
2159 	struct ieee80211_supported_band *sband;
2160 	size_t num_rates;
2161 	u32 supp_rates, rate_flags;
2162 	int i, j, shift;
2163 
2164 	sband = sdata->local->hw.wiphy->bands[band];
2165 	if (WARN_ON(!sband))
2166 		return 1;
2167 
2168 	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2169 	shift = ieee80211_vif_get_shift(&sdata->vif);
2170 
2171 	num_rates = sband->n_bitrates;
2172 	supp_rates = 0;
2173 	for (i = 0; i < elems->supp_rates_len +
2174 		     elems->ext_supp_rates_len; i++) {
2175 		u8 rate = 0;
2176 		int own_rate;
2177 		bool is_basic;
2178 		if (i < elems->supp_rates_len)
2179 			rate = elems->supp_rates[i];
2180 		else if (elems->ext_supp_rates)
2181 			rate = elems->ext_supp_rates
2182 				[i - elems->supp_rates_len];
2183 		own_rate = 5 * (rate & 0x7f);
2184 		is_basic = !!(rate & 0x80);
2185 
2186 		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2187 			continue;
2188 
2189 		for (j = 0; j < num_rates; j++) {
2190 			int brate;
2191 			if ((rate_flags & sband->bitrates[j].flags)
2192 			    != rate_flags)
2193 				continue;
2194 
2195 			brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2196 					     1 << shift);
2197 
2198 			if (brate == own_rate) {
2199 				supp_rates |= BIT(j);
2200 				if (basic_rates && is_basic)
2201 					*basic_rates |= BIT(j);
2202 			}
2203 		}
2204 	}
2205 	return supp_rates;
2206 }
2207 
ieee80211_stop_device(struct ieee80211_local * local)2208 void ieee80211_stop_device(struct ieee80211_local *local)
2209 {
2210 	ieee80211_led_radio(local, false);
2211 	ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2212 
2213 	cancel_work_sync(&local->reconfig_filter);
2214 
2215 	flush_workqueue(local->workqueue);
2216 	drv_stop(local);
2217 }
2218 
ieee80211_flush_completed_scan(struct ieee80211_local * local,bool aborted)2219 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2220 					   bool aborted)
2221 {
2222 	/* It's possible that we don't handle the scan completion in
2223 	 * time during suspend, so if it's still marked as completed
2224 	 * here, queue the work and flush it to clean things up.
2225 	 * Instead of calling the worker function directly here, we
2226 	 * really queue it to avoid potential races with other flows
2227 	 * scheduling the same work.
2228 	 */
2229 	if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2230 		/* If coming from reconfiguration failure, abort the scan so
2231 		 * we don't attempt to continue a partial HW scan - which is
2232 		 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2233 		 * completed scan, and a 5 GHz portion is still pending.
2234 		 */
2235 		if (aborted)
2236 			set_bit(SCAN_ABORTED, &local->scanning);
2237 		ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2238 		flush_delayed_work(&local->scan_work);
2239 	}
2240 }
2241 
ieee80211_handle_reconfig_failure(struct ieee80211_local * local)2242 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2243 {
2244 	struct ieee80211_sub_if_data *sdata;
2245 	struct ieee80211_chanctx *ctx;
2246 
2247 	/*
2248 	 * We get here if during resume the device can't be restarted properly.
2249 	 * We might also get here if this happens during HW reset, which is a
2250 	 * slightly different situation and we need to drop all connections in
2251 	 * the latter case.
2252 	 *
2253 	 * Ask cfg80211 to turn off all interfaces, this will result in more
2254 	 * warnings but at least we'll then get into a clean stopped state.
2255 	 */
2256 
2257 	local->resuming = false;
2258 	local->suspended = false;
2259 	local->in_reconfig = false;
2260 
2261 	ieee80211_flush_completed_scan(local, true);
2262 
2263 	/* scheduled scan clearly can't be running any more, but tell
2264 	 * cfg80211 and clear local state
2265 	 */
2266 	ieee80211_sched_scan_end(local);
2267 
2268 	list_for_each_entry(sdata, &local->interfaces, list)
2269 		sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2270 
2271 	/* Mark channel contexts as not being in the driver any more to avoid
2272 	 * removing them from the driver during the shutdown process...
2273 	 */
2274 	mutex_lock(&local->chanctx_mtx);
2275 	list_for_each_entry(ctx, &local->chanctx_list, list)
2276 		ctx->driver_present = false;
2277 	mutex_unlock(&local->chanctx_mtx);
2278 }
2279 
ieee80211_assign_chanctx(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link)2280 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2281 				     struct ieee80211_sub_if_data *sdata,
2282 				     struct ieee80211_link_data *link)
2283 {
2284 	struct ieee80211_chanctx_conf *conf;
2285 	struct ieee80211_chanctx *ctx;
2286 
2287 	if (!local->use_chanctx)
2288 		return;
2289 
2290 	mutex_lock(&local->chanctx_mtx);
2291 	conf = rcu_dereference_protected(link->conf->chanctx_conf,
2292 					 lockdep_is_held(&local->chanctx_mtx));
2293 	if (conf) {
2294 		ctx = container_of(conf, struct ieee80211_chanctx, conf);
2295 		drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2296 	}
2297 	mutex_unlock(&local->chanctx_mtx);
2298 }
2299 
ieee80211_reconfig_stations(struct ieee80211_sub_if_data * sdata)2300 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2301 {
2302 	struct ieee80211_local *local = sdata->local;
2303 	struct sta_info *sta;
2304 
2305 	/* add STAs back */
2306 	mutex_lock(&local->sta_mtx);
2307 	list_for_each_entry(sta, &local->sta_list, list) {
2308 		enum ieee80211_sta_state state;
2309 
2310 		if (!sta->uploaded || sta->sdata != sdata)
2311 			continue;
2312 
2313 		for (state = IEEE80211_STA_NOTEXIST;
2314 		     state < sta->sta_state; state++)
2315 			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2316 					      state + 1));
2317 	}
2318 	mutex_unlock(&local->sta_mtx);
2319 }
2320 
ieee80211_reconfig_nan(struct ieee80211_sub_if_data * sdata)2321 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2322 {
2323 	struct cfg80211_nan_func *func, **funcs;
2324 	int res, id, i = 0;
2325 
2326 	res = drv_start_nan(sdata->local, sdata,
2327 			    &sdata->u.nan.conf);
2328 	if (WARN_ON(res))
2329 		return res;
2330 
2331 	funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2332 			sizeof(*funcs),
2333 			GFP_KERNEL);
2334 	if (!funcs)
2335 		return -ENOMEM;
2336 
2337 	/* Add all the functions:
2338 	 * This is a little bit ugly. We need to call a potentially sleeping
2339 	 * callback for each NAN function, so we can't hold the spinlock.
2340 	 */
2341 	spin_lock_bh(&sdata->u.nan.func_lock);
2342 
2343 	idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2344 		funcs[i++] = func;
2345 
2346 	spin_unlock_bh(&sdata->u.nan.func_lock);
2347 
2348 	for (i = 0; funcs[i]; i++) {
2349 		res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2350 		if (WARN_ON(res))
2351 			ieee80211_nan_func_terminated(&sdata->vif,
2352 						      funcs[i]->instance_id,
2353 						      NL80211_NAN_FUNC_TERM_REASON_ERROR,
2354 						      GFP_KERNEL);
2355 	}
2356 
2357 	kfree(funcs);
2358 
2359 	return 0;
2360 }
2361 
ieee80211_reconfig(struct ieee80211_local * local)2362 int ieee80211_reconfig(struct ieee80211_local *local)
2363 {
2364 	struct ieee80211_hw *hw = &local->hw;
2365 	struct ieee80211_sub_if_data *sdata;
2366 	struct ieee80211_chanctx *ctx;
2367 	struct sta_info *sta;
2368 	int res, i;
2369 	bool reconfig_due_to_wowlan = false;
2370 	struct ieee80211_sub_if_data *sched_scan_sdata;
2371 	struct cfg80211_sched_scan_request *sched_scan_req;
2372 	bool sched_scan_stopped = false;
2373 	bool suspended = local->suspended;
2374 	bool in_reconfig = false;
2375 
2376 	/* nothing to do if HW shouldn't run */
2377 	if (!local->open_count)
2378 		goto wake_up;
2379 
2380 #ifdef CONFIG_PM
2381 	if (suspended)
2382 		local->resuming = true;
2383 
2384 	if (local->wowlan) {
2385 		/*
2386 		 * In the wowlan case, both mac80211 and the device
2387 		 * are functional when the resume op is called, so
2388 		 * clear local->suspended so the device could operate
2389 		 * normally (e.g. pass rx frames).
2390 		 */
2391 		local->suspended = false;
2392 		res = drv_resume(local);
2393 		local->wowlan = false;
2394 		if (res < 0) {
2395 			local->resuming = false;
2396 			return res;
2397 		}
2398 		if (res == 0)
2399 			goto wake_up;
2400 		WARN_ON(res > 1);
2401 		/*
2402 		 * res is 1, which means the driver requested
2403 		 * to go through a regular reset on wakeup.
2404 		 * restore local->suspended in this case.
2405 		 */
2406 		reconfig_due_to_wowlan = true;
2407 		local->suspended = true;
2408 	}
2409 #endif
2410 
2411 	/*
2412 	 * In case of hw_restart during suspend (without wowlan),
2413 	 * cancel restart work, as we are reconfiguring the device
2414 	 * anyway.
2415 	 * Note that restart_work is scheduled on a frozen workqueue,
2416 	 * so we can't deadlock in this case.
2417 	 */
2418 	if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2419 		cancel_work_sync(&local->restart_work);
2420 
2421 	local->started = false;
2422 
2423 	/*
2424 	 * Upon resume hardware can sometimes be goofy due to
2425 	 * various platform / driver / bus issues, so restarting
2426 	 * the device may at times not work immediately. Propagate
2427 	 * the error.
2428 	 */
2429 	res = drv_start(local);
2430 	if (res) {
2431 		if (suspended)
2432 			WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2433 		else
2434 			WARN(1, "Hardware became unavailable during restart.\n");
2435 		ieee80211_handle_reconfig_failure(local);
2436 		return res;
2437 	}
2438 
2439 	/* setup fragmentation threshold */
2440 	drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2441 
2442 	/* setup RTS threshold */
2443 	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2444 
2445 	/* reset coverage class */
2446 	drv_set_coverage_class(local, hw->wiphy->coverage_class);
2447 
2448 	ieee80211_led_radio(local, true);
2449 	ieee80211_mod_tpt_led_trig(local,
2450 				   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2451 
2452 	/* add interfaces */
2453 	sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2454 	if (sdata) {
2455 		/* in HW restart it exists already */
2456 		WARN_ON(local->resuming);
2457 		res = drv_add_interface(local, sdata);
2458 		if (WARN_ON(res)) {
2459 			RCU_INIT_POINTER(local->monitor_sdata, NULL);
2460 			synchronize_net();
2461 			kfree(sdata);
2462 		}
2463 	}
2464 
2465 	list_for_each_entry(sdata, &local->interfaces, list) {
2466 		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2467 		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2468 		    ieee80211_sdata_running(sdata)) {
2469 			res = drv_add_interface(local, sdata);
2470 			if (WARN_ON(res))
2471 				break;
2472 		}
2473 	}
2474 
2475 	/* If adding any of the interfaces failed above, roll back and
2476 	 * report failure.
2477 	 */
2478 	if (res) {
2479 		list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2480 						     list)
2481 			if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2482 			    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2483 			    ieee80211_sdata_running(sdata))
2484 				drv_remove_interface(local, sdata);
2485 		ieee80211_handle_reconfig_failure(local);
2486 		return res;
2487 	}
2488 
2489 	/* add channel contexts */
2490 	if (local->use_chanctx) {
2491 		mutex_lock(&local->chanctx_mtx);
2492 		list_for_each_entry(ctx, &local->chanctx_list, list)
2493 			if (ctx->replace_state !=
2494 			    IEEE80211_CHANCTX_REPLACES_OTHER)
2495 				WARN_ON(drv_add_chanctx(local, ctx));
2496 		mutex_unlock(&local->chanctx_mtx);
2497 
2498 		sdata = wiphy_dereference(local->hw.wiphy,
2499 					  local->monitor_sdata);
2500 		if (sdata && ieee80211_sdata_running(sdata))
2501 			ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2502 	}
2503 
2504 	/* reconfigure hardware */
2505 	ieee80211_hw_config(local, ~0);
2506 
2507 	ieee80211_configure_filter(local);
2508 
2509 	/* Finally also reconfigure all the BSS information */
2510 	list_for_each_entry(sdata, &local->interfaces, list) {
2511 		unsigned int link_id;
2512 		u32 changed;
2513 
2514 		if (!ieee80211_sdata_running(sdata))
2515 			continue;
2516 
2517 		sdata_lock(sdata);
2518 		for (link_id = 0;
2519 		     link_id < ARRAY_SIZE(sdata->vif.link_conf);
2520 		     link_id++) {
2521 			struct ieee80211_link_data *link;
2522 
2523 			link = sdata_dereference(sdata->link[link_id], sdata);
2524 			if (link)
2525 				ieee80211_assign_chanctx(local, sdata, link);
2526 		}
2527 
2528 		switch (sdata->vif.type) {
2529 		case NL80211_IFTYPE_AP_VLAN:
2530 		case NL80211_IFTYPE_MONITOR:
2531 			break;
2532 		case NL80211_IFTYPE_ADHOC:
2533 			if (sdata->vif.cfg.ibss_joined)
2534 				WARN_ON(drv_join_ibss(local, sdata));
2535 			fallthrough;
2536 		default:
2537 			ieee80211_reconfig_stations(sdata);
2538 			fallthrough;
2539 		case NL80211_IFTYPE_AP: /* AP stations are handled later */
2540 			for (i = 0; i < IEEE80211_NUM_ACS; i++)
2541 				drv_conf_tx(local, &sdata->deflink, i,
2542 					    &sdata->deflink.tx_conf[i]);
2543 			break;
2544 		}
2545 		sdata_unlock(sdata);
2546 
2547 		/* common change flags for all interface types */
2548 		changed = BSS_CHANGED_ERP_CTS_PROT |
2549 			  BSS_CHANGED_ERP_PREAMBLE |
2550 			  BSS_CHANGED_ERP_SLOT |
2551 			  BSS_CHANGED_HT |
2552 			  BSS_CHANGED_BASIC_RATES |
2553 			  BSS_CHANGED_BEACON_INT |
2554 			  BSS_CHANGED_BSSID |
2555 			  BSS_CHANGED_CQM |
2556 			  BSS_CHANGED_QOS |
2557 			  BSS_CHANGED_IDLE |
2558 			  BSS_CHANGED_TXPOWER |
2559 			  BSS_CHANGED_MCAST_RATE;
2560 
2561 		if (sdata->vif.bss_conf.mu_mimo_owner)
2562 			changed |= BSS_CHANGED_MU_GROUPS;
2563 
2564 		switch (sdata->vif.type) {
2565 		case NL80211_IFTYPE_STATION:
2566 			changed |= BSS_CHANGED_ASSOC |
2567 				   BSS_CHANGED_ARP_FILTER |
2568 				   BSS_CHANGED_PS;
2569 
2570 			/* Re-send beacon info report to the driver */
2571 			if (sdata->deflink.u.mgd.have_beacon)
2572 				changed |= BSS_CHANGED_BEACON_INFO;
2573 
2574 			if (sdata->vif.bss_conf.max_idle_period ||
2575 			    sdata->vif.bss_conf.protected_keep_alive)
2576 				changed |= BSS_CHANGED_KEEP_ALIVE;
2577 
2578 			sdata_lock(sdata);
2579 			ieee80211_bss_info_change_notify(sdata, changed);
2580 			sdata_unlock(sdata);
2581 			break;
2582 		case NL80211_IFTYPE_OCB:
2583 			changed |= BSS_CHANGED_OCB;
2584 			ieee80211_bss_info_change_notify(sdata, changed);
2585 			break;
2586 		case NL80211_IFTYPE_ADHOC:
2587 			changed |= BSS_CHANGED_IBSS;
2588 			fallthrough;
2589 		case NL80211_IFTYPE_AP:
2590 			changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2591 
2592 			if (sdata->vif.bss_conf.ftm_responder == 1 &&
2593 			    wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2594 					NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2595 				changed |= BSS_CHANGED_FTM_RESPONDER;
2596 
2597 			if (sdata->vif.type == NL80211_IFTYPE_AP) {
2598 				changed |= BSS_CHANGED_AP_PROBE_RESP;
2599 
2600 				if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2601 					drv_start_ap(local, sdata,
2602 						     sdata->deflink.conf);
2603 			}
2604 			fallthrough;
2605 		case NL80211_IFTYPE_MESH_POINT:
2606 			if (sdata->vif.bss_conf.enable_beacon) {
2607 				changed |= BSS_CHANGED_BEACON |
2608 					   BSS_CHANGED_BEACON_ENABLED;
2609 				ieee80211_bss_info_change_notify(sdata, changed);
2610 			}
2611 			break;
2612 		case NL80211_IFTYPE_NAN:
2613 			res = ieee80211_reconfig_nan(sdata);
2614 			if (res < 0) {
2615 				ieee80211_handle_reconfig_failure(local);
2616 				return res;
2617 			}
2618 			break;
2619 		case NL80211_IFTYPE_AP_VLAN:
2620 		case NL80211_IFTYPE_MONITOR:
2621 		case NL80211_IFTYPE_P2P_DEVICE:
2622 			/* nothing to do */
2623 			break;
2624 		case NL80211_IFTYPE_UNSPECIFIED:
2625 		case NUM_NL80211_IFTYPES:
2626 		case NL80211_IFTYPE_P2P_CLIENT:
2627 		case NL80211_IFTYPE_P2P_GO:
2628 		case NL80211_IFTYPE_WDS:
2629 			WARN_ON(1);
2630 			break;
2631 		}
2632 	}
2633 
2634 	ieee80211_recalc_ps(local);
2635 
2636 	/*
2637 	 * The sta might be in psm against the ap (e.g. because
2638 	 * this was the state before a hw restart), so we
2639 	 * explicitly send a null packet in order to make sure
2640 	 * it'll sync against the ap (and get out of psm).
2641 	 */
2642 	if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2643 		list_for_each_entry(sdata, &local->interfaces, list) {
2644 			if (sdata->vif.type != NL80211_IFTYPE_STATION)
2645 				continue;
2646 			if (!sdata->u.mgd.associated)
2647 				continue;
2648 
2649 			ieee80211_send_nullfunc(local, sdata, false);
2650 		}
2651 	}
2652 
2653 	/* APs are now beaconing, add back stations */
2654 	list_for_each_entry(sdata, &local->interfaces, list) {
2655 		if (!ieee80211_sdata_running(sdata))
2656 			continue;
2657 
2658 		sdata_lock(sdata);
2659 		switch (sdata->vif.type) {
2660 		case NL80211_IFTYPE_AP_VLAN:
2661 		case NL80211_IFTYPE_AP:
2662 			ieee80211_reconfig_stations(sdata);
2663 			break;
2664 		default:
2665 			break;
2666 		}
2667 		sdata_unlock(sdata);
2668 	}
2669 
2670 	/* add back keys */
2671 	list_for_each_entry(sdata, &local->interfaces, list)
2672 		ieee80211_reenable_keys(sdata);
2673 
2674 	/* Reconfigure sched scan if it was interrupted by FW restart */
2675 	mutex_lock(&local->mtx);
2676 	sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2677 						lockdep_is_held(&local->mtx));
2678 	sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2679 						lockdep_is_held(&local->mtx));
2680 	if (sched_scan_sdata && sched_scan_req)
2681 		/*
2682 		 * Sched scan stopped, but we don't want to report it. Instead,
2683 		 * we're trying to reschedule. However, if more than one scan
2684 		 * plan was set, we cannot reschedule since we don't know which
2685 		 * scan plan was currently running (and some scan plans may have
2686 		 * already finished).
2687 		 */
2688 		if (sched_scan_req->n_scan_plans > 1 ||
2689 		    __ieee80211_request_sched_scan_start(sched_scan_sdata,
2690 							 sched_scan_req)) {
2691 			RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2692 			RCU_INIT_POINTER(local->sched_scan_req, NULL);
2693 			sched_scan_stopped = true;
2694 		}
2695 	mutex_unlock(&local->mtx);
2696 
2697 	if (sched_scan_stopped)
2698 		cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2699 
2700  wake_up:
2701 
2702 	if (local->monitors == local->open_count && local->monitors > 0)
2703 		ieee80211_add_virtual_monitor(local);
2704 
2705 	/*
2706 	 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2707 	 * sessions can be established after a resume.
2708 	 *
2709 	 * Also tear down aggregation sessions since reconfiguring
2710 	 * them in a hardware restart scenario is not easily done
2711 	 * right now, and the hardware will have lost information
2712 	 * about the sessions, but we and the AP still think they
2713 	 * are active. This is really a workaround though.
2714 	 */
2715 	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2716 		mutex_lock(&local->sta_mtx);
2717 
2718 		list_for_each_entry(sta, &local->sta_list, list) {
2719 			if (!local->resuming)
2720 				ieee80211_sta_tear_down_BA_sessions(
2721 						sta, AGG_STOP_LOCAL_REQUEST);
2722 			clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2723 		}
2724 
2725 		mutex_unlock(&local->sta_mtx);
2726 	}
2727 
2728 	/*
2729 	 * If this is for hw restart things are still running.
2730 	 * We may want to change that later, however.
2731 	 */
2732 	if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2733 		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2734 
2735 	if (local->in_reconfig) {
2736 		in_reconfig = local->in_reconfig;
2737 		local->in_reconfig = false;
2738 		barrier();
2739 
2740 		/* Restart deferred ROCs */
2741 		mutex_lock(&local->mtx);
2742 		ieee80211_start_next_roc(local);
2743 		mutex_unlock(&local->mtx);
2744 
2745 		/* Requeue all works */
2746 		list_for_each_entry(sdata, &local->interfaces, list)
2747 			ieee80211_queue_work(&local->hw, &sdata->work);
2748 	}
2749 
2750 	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2751 					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2752 					false);
2753 
2754 	if (in_reconfig) {
2755 		list_for_each_entry(sdata, &local->interfaces, list) {
2756 			if (!ieee80211_sdata_running(sdata))
2757 				continue;
2758 			if (sdata->vif.type == NL80211_IFTYPE_STATION)
2759 				ieee80211_sta_restart(sdata);
2760 		}
2761 	}
2762 
2763 	if (!suspended)
2764 		return 0;
2765 
2766 #ifdef CONFIG_PM
2767 	/* first set suspended false, then resuming */
2768 	local->suspended = false;
2769 	mb();
2770 	local->resuming = false;
2771 
2772 	ieee80211_flush_completed_scan(local, false);
2773 
2774 	if (local->open_count && !reconfig_due_to_wowlan)
2775 		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2776 
2777 	list_for_each_entry(sdata, &local->interfaces, list) {
2778 		if (!ieee80211_sdata_running(sdata))
2779 			continue;
2780 		if (sdata->vif.type == NL80211_IFTYPE_STATION)
2781 			ieee80211_sta_restart(sdata);
2782 	}
2783 
2784 	mod_timer(&local->sta_cleanup, jiffies + 1);
2785 #else
2786 	WARN_ON(1);
2787 #endif
2788 
2789 	return 0;
2790 }
2791 
ieee80211_reconfig_disconnect(struct ieee80211_vif * vif,u8 flag)2792 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2793 {
2794 	struct ieee80211_sub_if_data *sdata;
2795 	struct ieee80211_local *local;
2796 	struct ieee80211_key *key;
2797 
2798 	if (WARN_ON(!vif))
2799 		return;
2800 
2801 	sdata = vif_to_sdata(vif);
2802 	local = sdata->local;
2803 
2804 	if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2805 		    !local->resuming))
2806 		return;
2807 
2808 	if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2809 		    !local->in_reconfig))
2810 		return;
2811 
2812 	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2813 		return;
2814 
2815 	sdata->flags |= flag;
2816 
2817 	mutex_lock(&local->key_mtx);
2818 	list_for_each_entry(key, &sdata->key_list, list)
2819 		key->flags |= KEY_FLAG_TAINTED;
2820 	mutex_unlock(&local->key_mtx);
2821 }
2822 
ieee80211_hw_restart_disconnect(struct ieee80211_vif * vif)2823 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2824 {
2825 	ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2826 }
2827 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2828 
ieee80211_resume_disconnect(struct ieee80211_vif * vif)2829 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2830 {
2831 	ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2832 }
2833 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2834 
ieee80211_recalc_smps(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link)2835 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2836 			   struct ieee80211_link_data *link)
2837 {
2838 	struct ieee80211_local *local = sdata->local;
2839 	struct ieee80211_chanctx_conf *chanctx_conf;
2840 	struct ieee80211_chanctx *chanctx;
2841 
2842 	mutex_lock(&local->chanctx_mtx);
2843 
2844 	chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2845 						 lockdep_is_held(&local->chanctx_mtx));
2846 
2847 	/*
2848 	 * This function can be called from a work, thus it may be possible
2849 	 * that the chanctx_conf is removed (due to a disconnection, for
2850 	 * example).
2851 	 * So nothing should be done in such case.
2852 	 */
2853 	if (!chanctx_conf)
2854 		goto unlock;
2855 
2856 	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2857 	ieee80211_recalc_smps_chanctx(local, chanctx);
2858  unlock:
2859 	mutex_unlock(&local->chanctx_mtx);
2860 }
2861 
ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data * sdata,int link_id)2862 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2863 				  int link_id)
2864 {
2865 	struct ieee80211_local *local = sdata->local;
2866 	struct ieee80211_chanctx_conf *chanctx_conf;
2867 	struct ieee80211_chanctx *chanctx;
2868 	int i;
2869 
2870 	mutex_lock(&local->chanctx_mtx);
2871 
2872 	for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2873 		struct ieee80211_bss_conf *bss_conf;
2874 
2875 		if (link_id >= 0 && link_id != i)
2876 			continue;
2877 
2878 		rcu_read_lock();
2879 		bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2880 		if (!bss_conf) {
2881 			rcu_read_unlock();
2882 			continue;
2883 		}
2884 
2885 		chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2886 							 lockdep_is_held(&local->chanctx_mtx));
2887 		/*
2888 		 * Since we hold the chanctx_mtx (checked above)
2889 		 * we can take the chanctx_conf pointer out of the
2890 		 * RCU critical section, it cannot go away without
2891 		 * the mutex. Just the way we reached it could - in
2892 		 * theory - go away, but we don't really care and
2893 		 * it really shouldn't happen anyway.
2894 		 */
2895 		rcu_read_unlock();
2896 
2897 		if (!chanctx_conf)
2898 			goto unlock;
2899 
2900 		chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2901 				       conf);
2902 		ieee80211_recalc_chanctx_min_def(local, chanctx);
2903 	}
2904  unlock:
2905 	mutex_unlock(&local->chanctx_mtx);
2906 }
2907 
ieee80211_ie_split_vendor(const u8 * ies,size_t ielen,size_t offset)2908 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2909 {
2910 	size_t pos = offset;
2911 
2912 	while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2913 		pos += 2 + ies[pos + 1];
2914 
2915 	return pos;
2916 }
2917 
ieee80211_ie_build_ht_cap(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,u16 cap)2918 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2919 			      u16 cap)
2920 {
2921 	__le16 tmp;
2922 
2923 	*pos++ = WLAN_EID_HT_CAPABILITY;
2924 	*pos++ = sizeof(struct ieee80211_ht_cap);
2925 	memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2926 
2927 	/* capability flags */
2928 	tmp = cpu_to_le16(cap);
2929 	memcpy(pos, &tmp, sizeof(u16));
2930 	pos += sizeof(u16);
2931 
2932 	/* AMPDU parameters */
2933 	*pos++ = ht_cap->ampdu_factor |
2934 		 (ht_cap->ampdu_density <<
2935 			IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2936 
2937 	/* MCS set */
2938 	memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2939 	pos += sizeof(ht_cap->mcs);
2940 
2941 	/* extended capabilities */
2942 	pos += sizeof(__le16);
2943 
2944 	/* BF capabilities */
2945 	pos += sizeof(__le32);
2946 
2947 	/* antenna selection */
2948 	pos += sizeof(u8);
2949 
2950 	return pos;
2951 }
2952 
ieee80211_ie_build_vht_cap(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,u32 cap)2953 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2954 			       u32 cap)
2955 {
2956 	__le32 tmp;
2957 
2958 	*pos++ = WLAN_EID_VHT_CAPABILITY;
2959 	*pos++ = sizeof(struct ieee80211_vht_cap);
2960 	memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2961 
2962 	/* capability flags */
2963 	tmp = cpu_to_le32(cap);
2964 	memcpy(pos, &tmp, sizeof(u32));
2965 	pos += sizeof(u32);
2966 
2967 	/* VHT MCS set */
2968 	memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2969 	pos += sizeof(vht_cap->vht_mcs);
2970 
2971 	return pos;
2972 }
2973 
ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data * sdata,u8 iftype)2974 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2975 {
2976 	const struct ieee80211_sta_he_cap *he_cap;
2977 	struct ieee80211_supported_band *sband;
2978 	u8 n;
2979 
2980 	sband = ieee80211_get_sband(sdata);
2981 	if (!sband)
2982 		return 0;
2983 
2984 	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2985 	if (!he_cap)
2986 		return 0;
2987 
2988 	n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2989 	return 2 + 1 +
2990 	       sizeof(he_cap->he_cap_elem) + n +
2991 	       ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2992 				     he_cap->he_cap_elem.phy_cap_info);
2993 }
2994 
ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags,u8 * pos,const struct ieee80211_sta_he_cap * he_cap,u8 * end)2995 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
2996 			      const struct ieee80211_sta_he_cap *he_cap,
2997 			      u8 *end)
2998 {
2999 	struct ieee80211_he_cap_elem elem;
3000 	u8 n;
3001 	u8 ie_len;
3002 	u8 *orig_pos = pos;
3003 
3004 	/* Make sure we have place for the IE */
3005 	/*
3006 	 * TODO: the 1 added is because this temporarily is under the EXTENSION
3007 	 * IE. Get rid of it when it moves.
3008 	 */
3009 	if (!he_cap)
3010 		return orig_pos;
3011 
3012 	/* modify on stack first to calculate 'n' and 'ie_len' correctly */
3013 	elem = he_cap->he_cap_elem;
3014 
3015 	if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3016 		elem.phy_cap_info[0] &=
3017 			~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3018 			  IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3019 
3020 	if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3021 		elem.phy_cap_info[0] &=
3022 			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3023 
3024 	if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3025 		elem.phy_cap_info[0] &=
3026 			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3027 
3028 	n = ieee80211_he_mcs_nss_size(&elem);
3029 	ie_len = 2 + 1 +
3030 		 sizeof(he_cap->he_cap_elem) + n +
3031 		 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3032 				       he_cap->he_cap_elem.phy_cap_info);
3033 
3034 	if ((end - pos) < ie_len)
3035 		return orig_pos;
3036 
3037 	*pos++ = WLAN_EID_EXTENSION;
3038 	pos++; /* We'll set the size later below */
3039 	*pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3040 
3041 	/* Fixed data */
3042 	memcpy(pos, &elem, sizeof(elem));
3043 	pos += sizeof(elem);
3044 
3045 	memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3046 	pos += n;
3047 
3048 	/* Check if PPE Threshold should be present */
3049 	if ((he_cap->he_cap_elem.phy_cap_info[6] &
3050 	     IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3051 		goto end;
3052 
3053 	/*
3054 	 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3055 	 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3056 	 */
3057 	n = hweight8(he_cap->ppe_thres[0] &
3058 		     IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3059 	n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3060 		   IEEE80211_PPE_THRES_NSS_POS));
3061 
3062 	/*
3063 	 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3064 	 * total size.
3065 	 */
3066 	n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3067 	n = DIV_ROUND_UP(n, 8);
3068 
3069 	/* Copy PPE Thresholds */
3070 	memcpy(pos, &he_cap->ppe_thres, n);
3071 	pos += n;
3072 
3073 end:
3074 	orig_pos[1] = (pos - orig_pos) - 2;
3075 	return pos;
3076 }
3077 
ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data * sdata,enum ieee80211_smps_mode smps_mode,struct sk_buff * skb)3078 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3079 				    enum ieee80211_smps_mode smps_mode,
3080 				    struct sk_buff *skb)
3081 {
3082 	struct ieee80211_supported_band *sband;
3083 	const struct ieee80211_sband_iftype_data *iftd;
3084 	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3085 	u8 *pos;
3086 	u16 cap;
3087 
3088 	if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3089 					  BIT(NL80211_BAND_6GHZ),
3090 					  IEEE80211_CHAN_NO_HE))
3091 		return;
3092 
3093 	sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3094 
3095 	iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3096 	if (!iftd)
3097 		return;
3098 
3099 	/* Check for device HE 6 GHz capability before adding element */
3100 	if (!iftd->he_6ghz_capa.capa)
3101 		return;
3102 
3103 	cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3104 	cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3105 
3106 	switch (smps_mode) {
3107 	case IEEE80211_SMPS_AUTOMATIC:
3108 	case IEEE80211_SMPS_NUM_MODES:
3109 		WARN_ON(1);
3110 		fallthrough;
3111 	case IEEE80211_SMPS_OFF:
3112 		cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3113 				       IEEE80211_HE_6GHZ_CAP_SM_PS);
3114 		break;
3115 	case IEEE80211_SMPS_STATIC:
3116 		cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3117 				       IEEE80211_HE_6GHZ_CAP_SM_PS);
3118 		break;
3119 	case IEEE80211_SMPS_DYNAMIC:
3120 		cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3121 				       IEEE80211_HE_6GHZ_CAP_SM_PS);
3122 		break;
3123 	}
3124 
3125 	pos = skb_put(skb, 2 + 1 + sizeof(cap));
3126 	ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3127 				    pos + 2 + 1 + sizeof(cap));
3128 }
3129 
ieee80211_ie_build_ht_oper(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,const struct cfg80211_chan_def * chandef,u16 prot_mode,bool rifs_mode)3130 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3131 			       const struct cfg80211_chan_def *chandef,
3132 			       u16 prot_mode, bool rifs_mode)
3133 {
3134 	struct ieee80211_ht_operation *ht_oper;
3135 	/* Build HT Information */
3136 	*pos++ = WLAN_EID_HT_OPERATION;
3137 	*pos++ = sizeof(struct ieee80211_ht_operation);
3138 	ht_oper = (struct ieee80211_ht_operation *)pos;
3139 	ht_oper->primary_chan = ieee80211_frequency_to_channel(
3140 					chandef->chan->center_freq);
3141 	switch (chandef->width) {
3142 	case NL80211_CHAN_WIDTH_160:
3143 	case NL80211_CHAN_WIDTH_80P80:
3144 	case NL80211_CHAN_WIDTH_80:
3145 	case NL80211_CHAN_WIDTH_40:
3146 		if (chandef->center_freq1 > chandef->chan->center_freq)
3147 			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3148 		else
3149 			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3150 		break;
3151 	case NL80211_CHAN_WIDTH_320:
3152 		/* HT information element should not be included on 6GHz */
3153 		WARN_ON(1);
3154 		return pos;
3155 	default:
3156 		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3157 		break;
3158 	}
3159 	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3160 	    chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3161 	    chandef->width != NL80211_CHAN_WIDTH_20)
3162 		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3163 
3164 	if (rifs_mode)
3165 		ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3166 
3167 	ht_oper->operation_mode = cpu_to_le16(prot_mode);
3168 	ht_oper->stbc_param = 0x0000;
3169 
3170 	/* It seems that Basic MCS set and Supported MCS set
3171 	   are identical for the first 10 bytes */
3172 	memset(&ht_oper->basic_set, 0, 16);
3173 	memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3174 
3175 	return pos + sizeof(struct ieee80211_ht_operation);
3176 }
3177 
ieee80211_ie_build_wide_bw_cs(u8 * pos,const struct cfg80211_chan_def * chandef)3178 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3179 				   const struct cfg80211_chan_def *chandef)
3180 {
3181 	*pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;	/* EID */
3182 	*pos++ = 3;					/* IE length */
3183 	/* New channel width */
3184 	switch (chandef->width) {
3185 	case NL80211_CHAN_WIDTH_80:
3186 		*pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3187 		break;
3188 	case NL80211_CHAN_WIDTH_160:
3189 		*pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3190 		break;
3191 	case NL80211_CHAN_WIDTH_80P80:
3192 		*pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3193 		break;
3194 	case NL80211_CHAN_WIDTH_320:
3195 		/* The behavior is not defined for 320 MHz channels */
3196 		WARN_ON(1);
3197 		fallthrough;
3198 	default:
3199 		*pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3200 	}
3201 
3202 	/* new center frequency segment 0 */
3203 	*pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3204 	/* new center frequency segment 1 */
3205 	if (chandef->center_freq2)
3206 		*pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3207 	else
3208 		*pos++ = 0;
3209 }
3210 
ieee80211_ie_build_vht_oper(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,const struct cfg80211_chan_def * chandef)3211 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3212 				const struct cfg80211_chan_def *chandef)
3213 {
3214 	struct ieee80211_vht_operation *vht_oper;
3215 
3216 	*pos++ = WLAN_EID_VHT_OPERATION;
3217 	*pos++ = sizeof(struct ieee80211_vht_operation);
3218 	vht_oper = (struct ieee80211_vht_operation *)pos;
3219 	vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3220 							chandef->center_freq1);
3221 	if (chandef->center_freq2)
3222 		vht_oper->center_freq_seg1_idx =
3223 			ieee80211_frequency_to_channel(chandef->center_freq2);
3224 	else
3225 		vht_oper->center_freq_seg1_idx = 0x00;
3226 
3227 	switch (chandef->width) {
3228 	case NL80211_CHAN_WIDTH_160:
3229 		/*
3230 		 * Convert 160 MHz channel width to new style as interop
3231 		 * workaround.
3232 		 */
3233 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3234 		vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3235 		if (chandef->chan->center_freq < chandef->center_freq1)
3236 			vht_oper->center_freq_seg0_idx -= 8;
3237 		else
3238 			vht_oper->center_freq_seg0_idx += 8;
3239 		break;
3240 	case NL80211_CHAN_WIDTH_80P80:
3241 		/*
3242 		 * Convert 80+80 MHz channel width to new style as interop
3243 		 * workaround.
3244 		 */
3245 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3246 		break;
3247 	case NL80211_CHAN_WIDTH_80:
3248 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3249 		break;
3250 	case NL80211_CHAN_WIDTH_320:
3251 		/* VHT information element should not be included on 6GHz */
3252 		WARN_ON(1);
3253 		return pos;
3254 	default:
3255 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3256 		break;
3257 	}
3258 
3259 	/* don't require special VHT peer rates */
3260 	vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3261 
3262 	return pos + sizeof(struct ieee80211_vht_operation);
3263 }
3264 
ieee80211_ie_build_he_oper(u8 * pos,struct cfg80211_chan_def * chandef)3265 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3266 {
3267 	struct ieee80211_he_operation *he_oper;
3268 	struct ieee80211_he_6ghz_oper *he_6ghz_op;
3269 	u32 he_oper_params;
3270 	u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3271 
3272 	if (chandef->chan->band == NL80211_BAND_6GHZ)
3273 		ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3274 
3275 	*pos++ = WLAN_EID_EXTENSION;
3276 	*pos++ = ie_len;
3277 	*pos++ = WLAN_EID_EXT_HE_OPERATION;
3278 
3279 	he_oper_params = 0;
3280 	he_oper_params |= u32_encode_bits(1023, /* disabled */
3281 				IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3282 	he_oper_params |= u32_encode_bits(1,
3283 				IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3284 	he_oper_params |= u32_encode_bits(1,
3285 				IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3286 	if (chandef->chan->band == NL80211_BAND_6GHZ)
3287 		he_oper_params |= u32_encode_bits(1,
3288 				IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3289 
3290 	he_oper = (struct ieee80211_he_operation *)pos;
3291 	he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3292 
3293 	/* don't require special HE peer rates */
3294 	he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3295 	pos += sizeof(struct ieee80211_he_operation);
3296 
3297 	if (chandef->chan->band != NL80211_BAND_6GHZ)
3298 		goto out;
3299 
3300 	/* TODO add VHT operational */
3301 	he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3302 	he_6ghz_op->minrate = 6; /* 6 Mbps */
3303 	he_6ghz_op->primary =
3304 		ieee80211_frequency_to_channel(chandef->chan->center_freq);
3305 	he_6ghz_op->ccfs0 =
3306 		ieee80211_frequency_to_channel(chandef->center_freq1);
3307 	if (chandef->center_freq2)
3308 		he_6ghz_op->ccfs1 =
3309 			ieee80211_frequency_to_channel(chandef->center_freq2);
3310 	else
3311 		he_6ghz_op->ccfs1 = 0;
3312 
3313 	switch (chandef->width) {
3314 	case NL80211_CHAN_WIDTH_320:
3315 		/*
3316 		 * TODO: mesh operation is not defined over 6GHz 320 MHz
3317 		 * channels.
3318 		 */
3319 		WARN_ON(1);
3320 		break;
3321 	case NL80211_CHAN_WIDTH_160:
3322 		/* Convert 160 MHz channel width to new style as interop
3323 		 * workaround.
3324 		 */
3325 		he_6ghz_op->control =
3326 			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3327 		he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3328 		if (chandef->chan->center_freq < chandef->center_freq1)
3329 			he_6ghz_op->ccfs0 -= 8;
3330 		else
3331 			he_6ghz_op->ccfs0 += 8;
3332 		fallthrough;
3333 	case NL80211_CHAN_WIDTH_80P80:
3334 		he_6ghz_op->control =
3335 			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3336 		break;
3337 	case NL80211_CHAN_WIDTH_80:
3338 		he_6ghz_op->control =
3339 			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3340 		break;
3341 	case NL80211_CHAN_WIDTH_40:
3342 		he_6ghz_op->control =
3343 			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3344 		break;
3345 	default:
3346 		he_6ghz_op->control =
3347 			IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3348 		break;
3349 	}
3350 
3351 	pos += sizeof(struct ieee80211_he_6ghz_oper);
3352 
3353 out:
3354 	return pos;
3355 }
3356 
ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation * ht_oper,struct cfg80211_chan_def * chandef)3357 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3358 			       struct cfg80211_chan_def *chandef)
3359 {
3360 	enum nl80211_channel_type channel_type;
3361 
3362 	if (!ht_oper)
3363 		return false;
3364 
3365 	switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3366 	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3367 		channel_type = NL80211_CHAN_HT20;
3368 		break;
3369 	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3370 		channel_type = NL80211_CHAN_HT40PLUS;
3371 		break;
3372 	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3373 		channel_type = NL80211_CHAN_HT40MINUS;
3374 		break;
3375 	default:
3376 		return false;
3377 	}
3378 
3379 	cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3380 	return true;
3381 }
3382 
ieee80211_chandef_vht_oper(struct ieee80211_hw * hw,u32 vht_cap_info,const struct ieee80211_vht_operation * oper,const struct ieee80211_ht_operation * htop,struct cfg80211_chan_def * chandef)3383 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3384 				const struct ieee80211_vht_operation *oper,
3385 				const struct ieee80211_ht_operation *htop,
3386 				struct cfg80211_chan_def *chandef)
3387 {
3388 	struct cfg80211_chan_def new = *chandef;
3389 	int cf0, cf1;
3390 	int ccfs0, ccfs1, ccfs2;
3391 	int ccf0, ccf1;
3392 	u32 vht_cap;
3393 	bool support_80_80 = false;
3394 	bool support_160 = false;
3395 	u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3396 					  IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3397 	u8 supp_chwidth = u32_get_bits(vht_cap_info,
3398 				       IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3399 
3400 	if (!oper || !htop)
3401 		return false;
3402 
3403 	vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3404 	support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3405 				  IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3406 	support_80_80 = ((vht_cap &
3407 			 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3408 			(vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3409 			 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3410 			((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3411 				    IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3412 	ccfs0 = oper->center_freq_seg0_idx;
3413 	ccfs1 = oper->center_freq_seg1_idx;
3414 	ccfs2 = (le16_to_cpu(htop->operation_mode) &
3415 				IEEE80211_HT_OP_MODE_CCFS2_MASK)
3416 			>> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3417 
3418 	ccf0 = ccfs0;
3419 
3420 	/* if not supported, parse as though we didn't understand it */
3421 	if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3422 		ext_nss_bw_supp = 0;
3423 
3424 	/*
3425 	 * Cf. IEEE 802.11 Table 9-250
3426 	 *
3427 	 * We really just consider that because it's inefficient to connect
3428 	 * at a higher bandwidth than we'll actually be able to use.
3429 	 */
3430 	switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3431 	default:
3432 	case 0x00:
3433 		ccf1 = 0;
3434 		support_160 = false;
3435 		support_80_80 = false;
3436 		break;
3437 	case 0x01:
3438 		support_80_80 = false;
3439 		fallthrough;
3440 	case 0x02:
3441 	case 0x03:
3442 		ccf1 = ccfs2;
3443 		break;
3444 	case 0x10:
3445 		ccf1 = ccfs1;
3446 		break;
3447 	case 0x11:
3448 	case 0x12:
3449 		if (!ccfs1)
3450 			ccf1 = ccfs2;
3451 		else
3452 			ccf1 = ccfs1;
3453 		break;
3454 	case 0x13:
3455 	case 0x20:
3456 	case 0x23:
3457 		ccf1 = ccfs1;
3458 		break;
3459 	}
3460 
3461 	cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3462 	cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3463 
3464 	switch (oper->chan_width) {
3465 	case IEEE80211_VHT_CHANWIDTH_USE_HT:
3466 		/* just use HT information directly */
3467 		break;
3468 	case IEEE80211_VHT_CHANWIDTH_80MHZ:
3469 		new.width = NL80211_CHAN_WIDTH_80;
3470 		new.center_freq1 = cf0;
3471 		/* If needed, adjust based on the newer interop workaround. */
3472 		if (ccf1) {
3473 			unsigned int diff;
3474 
3475 			diff = abs(ccf1 - ccf0);
3476 			if ((diff == 8) && support_160) {
3477 				new.width = NL80211_CHAN_WIDTH_160;
3478 				new.center_freq1 = cf1;
3479 			} else if ((diff > 8) && support_80_80) {
3480 				new.width = NL80211_CHAN_WIDTH_80P80;
3481 				new.center_freq2 = cf1;
3482 			}
3483 		}
3484 		break;
3485 	case IEEE80211_VHT_CHANWIDTH_160MHZ:
3486 		/* deprecated encoding */
3487 		new.width = NL80211_CHAN_WIDTH_160;
3488 		new.center_freq1 = cf0;
3489 		break;
3490 	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3491 		/* deprecated encoding */
3492 		new.width = NL80211_CHAN_WIDTH_80P80;
3493 		new.center_freq1 = cf0;
3494 		new.center_freq2 = cf1;
3495 		break;
3496 	default:
3497 		return false;
3498 	}
3499 
3500 	if (!cfg80211_chandef_valid(&new))
3501 		return false;
3502 
3503 	*chandef = new;
3504 	return true;
3505 }
3506 
ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation * eht_oper,bool support_160,bool support_320,struct cfg80211_chan_def * chandef)3507 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper,
3508 				bool support_160, bool support_320,
3509 				struct cfg80211_chan_def *chandef)
3510 {
3511 	struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
3512 
3513 	chandef->center_freq1 =
3514 		ieee80211_channel_to_frequency(info->ccfs0,
3515 					       chandef->chan->band);
3516 
3517 	switch (u8_get_bits(info->control,
3518 			    IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3519 	case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3520 		chandef->width = NL80211_CHAN_WIDTH_20;
3521 		break;
3522 	case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3523 		chandef->width = NL80211_CHAN_WIDTH_40;
3524 		break;
3525 	case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3526 		chandef->width = NL80211_CHAN_WIDTH_80;
3527 		break;
3528 	case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3529 		if (support_160) {
3530 			chandef->width = NL80211_CHAN_WIDTH_160;
3531 			chandef->center_freq1 =
3532 				ieee80211_channel_to_frequency(info->ccfs1,
3533 							       chandef->chan->band);
3534 		} else {
3535 			chandef->width = NL80211_CHAN_WIDTH_80;
3536 		}
3537 		break;
3538 	case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3539 		if (support_320) {
3540 			chandef->width = NL80211_CHAN_WIDTH_320;
3541 			chandef->center_freq1 =
3542 				ieee80211_channel_to_frequency(info->ccfs1,
3543 							       chandef->chan->band);
3544 		} else if (support_160) {
3545 			chandef->width = NL80211_CHAN_WIDTH_160;
3546 		} else {
3547 			chandef->width = NL80211_CHAN_WIDTH_80;
3548 
3549 			if (chandef->center_freq1 > chandef->chan->center_freq)
3550 				chandef->center_freq1 -= 40;
3551 			else
3552 				chandef->center_freq1 += 40;
3553 		}
3554 		break;
3555 	}
3556 }
3557 
ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data * sdata,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,struct cfg80211_chan_def * chandef)3558 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3559 				    const struct ieee80211_he_operation *he_oper,
3560 				    const struct ieee80211_eht_operation *eht_oper,
3561 				    struct cfg80211_chan_def *chandef)
3562 {
3563 	struct ieee80211_local *local = sdata->local;
3564 	struct ieee80211_supported_band *sband;
3565 	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3566 	const struct ieee80211_sta_he_cap *he_cap;
3567 	const struct ieee80211_sta_eht_cap *eht_cap;
3568 	struct cfg80211_chan_def he_chandef = *chandef;
3569 	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3570 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3571 	bool support_80_80, support_160, support_320;
3572 	u8 he_phy_cap, eht_phy_cap;
3573 	u32 freq;
3574 
3575 	if (chandef->chan->band != NL80211_BAND_6GHZ)
3576 		return true;
3577 
3578 	sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3579 
3580 	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3581 	if (!he_cap) {
3582 		sdata_info(sdata, "Missing iftype sband data/HE cap");
3583 		return false;
3584 	}
3585 
3586 	he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3587 	support_160 =
3588 		he_phy_cap &
3589 		IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3590 	support_80_80 =
3591 		he_phy_cap &
3592 		IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3593 
3594 	if (!he_oper) {
3595 		sdata_info(sdata,
3596 			   "HE is not advertised on (on %d MHz), expect issues\n",
3597 			   chandef->chan->center_freq);
3598 		return false;
3599 	}
3600 
3601 	eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3602 	if (!eht_cap) {
3603 		sdata_info(sdata, "Missing iftype sband data/EHT cap");
3604 		eht_oper = NULL;
3605 	}
3606 
3607 	he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3608 
3609 	if (!he_6ghz_oper) {
3610 		sdata_info(sdata,
3611 			   "HE 6GHz operation missing (on %d MHz), expect issues\n",
3612 			   chandef->chan->center_freq);
3613 		return false;
3614 	}
3615 
3616 	/*
3617 	 * The EHT operation IE does not contain the primary channel so the
3618 	 * primary channel frequency should be taken from the 6 GHz operation
3619 	 * information.
3620 	 */
3621 	freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3622 					      NL80211_BAND_6GHZ);
3623 	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3624 
3625 	switch (u8_get_bits(he_6ghz_oper->control,
3626 			    IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3627 	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3628 		bss_conf->power_type = IEEE80211_REG_LPI_AP;
3629 		break;
3630 	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3631 		bss_conf->power_type = IEEE80211_REG_SP_AP;
3632 		break;
3633 	default:
3634 		bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3635 		break;
3636 	}
3637 
3638 	if (!eht_oper ||
3639 	    !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3640 		switch (u8_get_bits(he_6ghz_oper->control,
3641 				    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3642 		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3643 			he_chandef.width = NL80211_CHAN_WIDTH_20;
3644 			break;
3645 		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3646 			he_chandef.width = NL80211_CHAN_WIDTH_40;
3647 			break;
3648 		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3649 			he_chandef.width = NL80211_CHAN_WIDTH_80;
3650 			break;
3651 		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3652 			he_chandef.width = NL80211_CHAN_WIDTH_80;
3653 			if (!he_6ghz_oper->ccfs1)
3654 				break;
3655 			if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3656 				if (support_160)
3657 					he_chandef.width = NL80211_CHAN_WIDTH_160;
3658 			} else {
3659 				if (support_80_80)
3660 					he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3661 			}
3662 			break;
3663 		}
3664 
3665 		if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3666 			he_chandef.center_freq1 =
3667 				ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3668 							       NL80211_BAND_6GHZ);
3669 		} else {
3670 			he_chandef.center_freq1 =
3671 				ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3672 							       NL80211_BAND_6GHZ);
3673 			if (support_80_80 || support_160)
3674 				he_chandef.center_freq2 =
3675 					ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3676 								       NL80211_BAND_6GHZ);
3677 		}
3678 	} else {
3679 		eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3680 		support_320 =
3681 			eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3682 
3683 		ieee80211_chandef_eht_oper(eht_oper, support_160,
3684 					   support_320, &he_chandef);
3685 	}
3686 
3687 	if (!cfg80211_chandef_valid(&he_chandef)) {
3688 		sdata_info(sdata,
3689 			   "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3690 			   he_chandef.chan ? he_chandef.chan->center_freq : 0,
3691 			   he_chandef.width,
3692 			   he_chandef.center_freq1,
3693 			   he_chandef.center_freq2);
3694 		return false;
3695 	}
3696 
3697 	*chandef = he_chandef;
3698 
3699 	return true;
3700 }
3701 
ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie * oper,struct cfg80211_chan_def * chandef)3702 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3703 				struct cfg80211_chan_def *chandef)
3704 {
3705 	u32 oper_freq;
3706 
3707 	if (!oper)
3708 		return false;
3709 
3710 	switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3711 	case IEEE80211_S1G_CHANWIDTH_1MHZ:
3712 		chandef->width = NL80211_CHAN_WIDTH_1;
3713 		break;
3714 	case IEEE80211_S1G_CHANWIDTH_2MHZ:
3715 		chandef->width = NL80211_CHAN_WIDTH_2;
3716 		break;
3717 	case IEEE80211_S1G_CHANWIDTH_4MHZ:
3718 		chandef->width = NL80211_CHAN_WIDTH_4;
3719 		break;
3720 	case IEEE80211_S1G_CHANWIDTH_8MHZ:
3721 		chandef->width = NL80211_CHAN_WIDTH_8;
3722 		break;
3723 	case IEEE80211_S1G_CHANWIDTH_16MHZ:
3724 		chandef->width = NL80211_CHAN_WIDTH_16;
3725 		break;
3726 	default:
3727 		return false;
3728 	}
3729 
3730 	oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3731 						  NL80211_BAND_S1GHZ);
3732 	chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3733 	chandef->freq1_offset = oper_freq % 1000;
3734 
3735 	return true;
3736 }
3737 
ieee80211_parse_bitrates(enum nl80211_chan_width width,const struct ieee80211_supported_band * sband,const u8 * srates,int srates_len,u32 * rates)3738 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
3739 			     const struct ieee80211_supported_band *sband,
3740 			     const u8 *srates, int srates_len, u32 *rates)
3741 {
3742 	u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
3743 	int shift = ieee80211_chanwidth_get_shift(width);
3744 	struct ieee80211_rate *br;
3745 	int brate, rate, i, j, count = 0;
3746 
3747 	*rates = 0;
3748 
3749 	for (i = 0; i < srates_len; i++) {
3750 		rate = srates[i] & 0x7f;
3751 
3752 		for (j = 0; j < sband->n_bitrates; j++) {
3753 			br = &sband->bitrates[j];
3754 			if ((rate_flags & br->flags) != rate_flags)
3755 				continue;
3756 
3757 			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3758 			if (brate == rate) {
3759 				*rates |= BIT(j);
3760 				count++;
3761 				break;
3762 			}
3763 		}
3764 	}
3765 	return count;
3766 }
3767 
ieee80211_add_srates_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,bool need_basic,enum nl80211_band band)3768 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3769 			    struct sk_buff *skb, bool need_basic,
3770 			    enum nl80211_band band)
3771 {
3772 	struct ieee80211_local *local = sdata->local;
3773 	struct ieee80211_supported_band *sband;
3774 	int rate, shift;
3775 	u8 i, rates, *pos;
3776 	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3777 	u32 rate_flags;
3778 
3779 	shift = ieee80211_vif_get_shift(&sdata->vif);
3780 	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3781 	sband = local->hw.wiphy->bands[band];
3782 	rates = 0;
3783 	for (i = 0; i < sband->n_bitrates; i++) {
3784 		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3785 			continue;
3786 		rates++;
3787 	}
3788 	if (rates > 8)
3789 		rates = 8;
3790 
3791 	if (skb_tailroom(skb) < rates + 2)
3792 		return -ENOMEM;
3793 
3794 	pos = skb_put(skb, rates + 2);
3795 	*pos++ = WLAN_EID_SUPP_RATES;
3796 	*pos++ = rates;
3797 	for (i = 0; i < rates; i++) {
3798 		u8 basic = 0;
3799 		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3800 			continue;
3801 
3802 		if (need_basic && basic_rates & BIT(i))
3803 			basic = 0x80;
3804 		rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3805 				    5 * (1 << shift));
3806 		*pos++ = basic | (u8) rate;
3807 	}
3808 
3809 	return 0;
3810 }
3811 
ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,bool need_basic,enum nl80211_band band)3812 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3813 				struct sk_buff *skb, bool need_basic,
3814 				enum nl80211_band band)
3815 {
3816 	struct ieee80211_local *local = sdata->local;
3817 	struct ieee80211_supported_band *sband;
3818 	int rate, shift;
3819 	u8 i, exrates, *pos;
3820 	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3821 	u32 rate_flags;
3822 
3823 	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3824 	shift = ieee80211_vif_get_shift(&sdata->vif);
3825 
3826 	sband = local->hw.wiphy->bands[band];
3827 	exrates = 0;
3828 	for (i = 0; i < sband->n_bitrates; i++) {
3829 		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3830 			continue;
3831 		exrates++;
3832 	}
3833 
3834 	if (exrates > 8)
3835 		exrates -= 8;
3836 	else
3837 		exrates = 0;
3838 
3839 	if (skb_tailroom(skb) < exrates + 2)
3840 		return -ENOMEM;
3841 
3842 	if (exrates) {
3843 		pos = skb_put(skb, exrates + 2);
3844 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
3845 		*pos++ = exrates;
3846 		for (i = 8; i < sband->n_bitrates; i++) {
3847 			u8 basic = 0;
3848 			if ((rate_flags & sband->bitrates[i].flags)
3849 			    != rate_flags)
3850 				continue;
3851 			if (need_basic && basic_rates & BIT(i))
3852 				basic = 0x80;
3853 			rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3854 					    5 * (1 << shift));
3855 			*pos++ = basic | (u8) rate;
3856 		}
3857 	}
3858 	return 0;
3859 }
3860 
ieee80211_ave_rssi(struct ieee80211_vif * vif)3861 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3862 {
3863 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3864 
3865 	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3866 		return 0;
3867 
3868 	return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3869 }
3870 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3871 
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info * mcs)3872 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3873 {
3874 	if (!mcs)
3875 		return 1;
3876 
3877 	/* TODO: consider rx_highest */
3878 
3879 	if (mcs->rx_mask[3])
3880 		return 4;
3881 	if (mcs->rx_mask[2])
3882 		return 3;
3883 	if (mcs->rx_mask[1])
3884 		return 2;
3885 	return 1;
3886 }
3887 
3888 /**
3889  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3890  * @local: mac80211 hw info struct
3891  * @status: RX status
3892  * @mpdu_len: total MPDU length (including FCS)
3893  * @mpdu_offset: offset into MPDU to calculate timestamp at
3894  *
3895  * This function calculates the RX timestamp at the given MPDU offset, taking
3896  * into account what the RX timestamp was. An offset of 0 will just normalize
3897  * the timestamp to TSF at beginning of MPDU reception.
3898  */
ieee80211_calculate_rx_timestamp(struct ieee80211_local * local,struct ieee80211_rx_status * status,unsigned int mpdu_len,unsigned int mpdu_offset)3899 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3900 				     struct ieee80211_rx_status *status,
3901 				     unsigned int mpdu_len,
3902 				     unsigned int mpdu_offset)
3903 {
3904 	u64 ts = status->mactime;
3905 	struct rate_info ri;
3906 	u16 rate;
3907 	u8 n_ltf;
3908 
3909 	if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3910 		return 0;
3911 
3912 	memset(&ri, 0, sizeof(ri));
3913 
3914 	ri.bw = status->bw;
3915 
3916 	/* Fill cfg80211 rate info */
3917 	switch (status->encoding) {
3918 	case RX_ENC_HE:
3919 		ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3920 		ri.mcs = status->rate_idx;
3921 		ri.nss = status->nss;
3922 		ri.he_ru_alloc = status->he_ru;
3923 		if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3924 			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3925 
3926 		/*
3927 		 * See P802.11ax_D6.0, section 27.3.4 for
3928 		 * VHT PPDU format.
3929 		 */
3930 		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3931 			mpdu_offset += 2;
3932 			ts += 36;
3933 
3934 			/*
3935 			 * TODO:
3936 			 * For HE MU PPDU, add the HE-SIG-B.
3937 			 * For HE ER PPDU, add 8us for the HE-SIG-A.
3938 			 * For HE TB PPDU, add 4us for the HE-STF.
3939 			 * Add the HE-LTF durations - variable.
3940 			 */
3941 		}
3942 
3943 		break;
3944 	case RX_ENC_HT:
3945 		ri.mcs = status->rate_idx;
3946 		ri.flags |= RATE_INFO_FLAGS_MCS;
3947 		if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3948 			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3949 
3950 		/*
3951 		 * See P802.11REVmd_D3.0, section 19.3.2 for
3952 		 * HT PPDU format.
3953 		 */
3954 		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3955 			mpdu_offset += 2;
3956 			if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3957 				ts += 24;
3958 			else
3959 				ts += 32;
3960 
3961 			/*
3962 			 * Add Data HT-LTFs per streams
3963 			 * TODO: add Extension HT-LTFs, 4us per LTF
3964 			 */
3965 			n_ltf = ((ri.mcs >> 3) & 3) + 1;
3966 			n_ltf = n_ltf == 3 ? 4 : n_ltf;
3967 			ts += n_ltf * 4;
3968 		}
3969 
3970 		break;
3971 	case RX_ENC_VHT:
3972 		ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3973 		ri.mcs = status->rate_idx;
3974 		ri.nss = status->nss;
3975 		if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3976 			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3977 
3978 		/*
3979 		 * See P802.11REVmd_D3.0, section 21.3.2 for
3980 		 * VHT PPDU format.
3981 		 */
3982 		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3983 			mpdu_offset += 2;
3984 			ts += 36;
3985 
3986 			/*
3987 			 * Add VHT-LTFs per streams
3988 			 */
3989 			n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3990 				ri.nss + 1 : ri.nss;
3991 			ts += 4 * n_ltf;
3992 		}
3993 
3994 		break;
3995 	default:
3996 		WARN_ON(1);
3997 		fallthrough;
3998 	case RX_ENC_LEGACY: {
3999 		struct ieee80211_supported_band *sband;
4000 		int shift = 0;
4001 		int bitrate;
4002 
4003 		switch (status->bw) {
4004 		case RATE_INFO_BW_10:
4005 			shift = 1;
4006 			break;
4007 		case RATE_INFO_BW_5:
4008 			shift = 2;
4009 			break;
4010 		}
4011 
4012 		sband = local->hw.wiphy->bands[status->band];
4013 		bitrate = sband->bitrates[status->rate_idx].bitrate;
4014 		ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
4015 
4016 		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4017 			if (status->band == NL80211_BAND_5GHZ) {
4018 				ts += 20 << shift;
4019 				mpdu_offset += 2;
4020 			} else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4021 				ts += 96;
4022 			} else {
4023 				ts += 192;
4024 			}
4025 		}
4026 		break;
4027 		}
4028 	}
4029 
4030 	rate = cfg80211_calculate_bitrate(&ri);
4031 	if (WARN_ONCE(!rate,
4032 		      "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4033 		      (unsigned long long)status->flag, status->rate_idx,
4034 		      status->nss))
4035 		return 0;
4036 
4037 	/* rewind from end of MPDU */
4038 	if (status->flag & RX_FLAG_MACTIME_END)
4039 		ts -= mpdu_len * 8 * 10 / rate;
4040 
4041 	ts += mpdu_offset * 8 * 10 / rate;
4042 
4043 	return ts;
4044 }
4045 
ieee80211_dfs_cac_cancel(struct ieee80211_local * local)4046 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4047 {
4048 	struct ieee80211_sub_if_data *sdata;
4049 	struct cfg80211_chan_def chandef;
4050 
4051 	/* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4052 	lockdep_assert_wiphy(local->hw.wiphy);
4053 
4054 	mutex_lock(&local->mtx);
4055 	list_for_each_entry(sdata, &local->interfaces, list) {
4056 		/* it might be waiting for the local->mtx, but then
4057 		 * by the time it gets it, sdata->wdev.cac_started
4058 		 * will no longer be true
4059 		 */
4060 		cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work);
4061 
4062 		if (sdata->wdev.cac_started) {
4063 			chandef = sdata->vif.bss_conf.chandef;
4064 			ieee80211_link_release_channel(&sdata->deflink);
4065 			cfg80211_cac_event(sdata->dev,
4066 					   &chandef,
4067 					   NL80211_RADAR_CAC_ABORTED,
4068 					   GFP_KERNEL);
4069 		}
4070 	}
4071 	mutex_unlock(&local->mtx);
4072 }
4073 
ieee80211_dfs_radar_detected_work(struct work_struct * work)4074 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4075 {
4076 	struct ieee80211_local *local =
4077 		container_of(work, struct ieee80211_local, radar_detected_work);
4078 	struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4079 	struct ieee80211_chanctx *ctx;
4080 	int num_chanctx = 0;
4081 
4082 	mutex_lock(&local->chanctx_mtx);
4083 	list_for_each_entry(ctx, &local->chanctx_list, list) {
4084 		if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4085 			continue;
4086 
4087 		num_chanctx++;
4088 		chandef = ctx->conf.def;
4089 	}
4090 	mutex_unlock(&local->chanctx_mtx);
4091 
4092 	wiphy_lock(local->hw.wiphy);
4093 	ieee80211_dfs_cac_cancel(local);
4094 	wiphy_unlock(local->hw.wiphy);
4095 
4096 	if (num_chanctx > 1)
4097 		/* XXX: multi-channel is not supported yet */
4098 		WARN_ON(1);
4099 	else
4100 		cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4101 }
4102 
ieee80211_radar_detected(struct ieee80211_hw * hw)4103 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4104 {
4105 	struct ieee80211_local *local = hw_to_local(hw);
4106 
4107 	trace_api_radar_detected(local);
4108 
4109 	schedule_work(&local->radar_detected_work);
4110 }
4111 EXPORT_SYMBOL(ieee80211_radar_detected);
4112 
ieee80211_chandef_downgrade(struct cfg80211_chan_def * c)4113 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4114 {
4115 	ieee80211_conn_flags_t ret;
4116 	int tmp;
4117 
4118 	switch (c->width) {
4119 	case NL80211_CHAN_WIDTH_20:
4120 		c->width = NL80211_CHAN_WIDTH_20_NOHT;
4121 		ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4122 		break;
4123 	case NL80211_CHAN_WIDTH_40:
4124 		c->width = NL80211_CHAN_WIDTH_20;
4125 		c->center_freq1 = c->chan->center_freq;
4126 		ret = IEEE80211_CONN_DISABLE_40MHZ |
4127 		      IEEE80211_CONN_DISABLE_VHT;
4128 		break;
4129 	case NL80211_CHAN_WIDTH_80:
4130 		tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4131 		/* n_P40 */
4132 		tmp /= 2;
4133 		/* freq_P40 */
4134 		c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4135 		c->width = NL80211_CHAN_WIDTH_40;
4136 		ret = IEEE80211_CONN_DISABLE_VHT;
4137 		break;
4138 	case NL80211_CHAN_WIDTH_80P80:
4139 		c->center_freq2 = 0;
4140 		c->width = NL80211_CHAN_WIDTH_80;
4141 		ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4142 		      IEEE80211_CONN_DISABLE_160MHZ;
4143 		break;
4144 	case NL80211_CHAN_WIDTH_160:
4145 		/* n_P20 */
4146 		tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4147 		/* n_P80 */
4148 		tmp /= 4;
4149 		c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4150 		c->width = NL80211_CHAN_WIDTH_80;
4151 		ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4152 		      IEEE80211_CONN_DISABLE_160MHZ;
4153 		break;
4154 	case NL80211_CHAN_WIDTH_320:
4155 		/* n_P20 */
4156 		tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4157 		/* n_P160 */
4158 		tmp /= 8;
4159 		c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4160 		c->width = NL80211_CHAN_WIDTH_160;
4161 		ret = IEEE80211_CONN_DISABLE_320MHZ;
4162 		break;
4163 	default:
4164 	case NL80211_CHAN_WIDTH_20_NOHT:
4165 		WARN_ON_ONCE(1);
4166 		c->width = NL80211_CHAN_WIDTH_20_NOHT;
4167 		ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4168 		break;
4169 	case NL80211_CHAN_WIDTH_1:
4170 	case NL80211_CHAN_WIDTH_2:
4171 	case NL80211_CHAN_WIDTH_4:
4172 	case NL80211_CHAN_WIDTH_8:
4173 	case NL80211_CHAN_WIDTH_16:
4174 	case NL80211_CHAN_WIDTH_5:
4175 	case NL80211_CHAN_WIDTH_10:
4176 		WARN_ON_ONCE(1);
4177 		/* keep c->width */
4178 		ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4179 		break;
4180 	}
4181 
4182 	WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4183 
4184 	return ret;
4185 }
4186 
4187 /*
4188  * Returns true if smps_mode_new is strictly more restrictive than
4189  * smps_mode_old.
4190  */
ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,enum ieee80211_smps_mode smps_mode_new)4191 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4192 				   enum ieee80211_smps_mode smps_mode_new)
4193 {
4194 	if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4195 			 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4196 		return false;
4197 
4198 	switch (smps_mode_old) {
4199 	case IEEE80211_SMPS_STATIC:
4200 		return false;
4201 	case IEEE80211_SMPS_DYNAMIC:
4202 		return smps_mode_new == IEEE80211_SMPS_STATIC;
4203 	case IEEE80211_SMPS_OFF:
4204 		return smps_mode_new != IEEE80211_SMPS_OFF;
4205 	default:
4206 		WARN_ON(1);
4207 	}
4208 
4209 	return false;
4210 }
4211 
ieee80211_send_action_csa(struct ieee80211_sub_if_data * sdata,struct cfg80211_csa_settings * csa_settings)4212 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4213 			      struct cfg80211_csa_settings *csa_settings)
4214 {
4215 	struct sk_buff *skb;
4216 	struct ieee80211_mgmt *mgmt;
4217 	struct ieee80211_local *local = sdata->local;
4218 	int freq;
4219 	int hdr_len = offsetofend(struct ieee80211_mgmt,
4220 				  u.action.u.chan_switch);
4221 	u8 *pos;
4222 
4223 	if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4224 	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4225 		return -EOPNOTSUPP;
4226 
4227 	skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4228 			    5 + /* channel switch announcement element */
4229 			    3 + /* secondary channel offset element */
4230 			    5 + /* wide bandwidth channel switch announcement */
4231 			    8); /* mesh channel switch parameters element */
4232 	if (!skb)
4233 		return -ENOMEM;
4234 
4235 	skb_reserve(skb, local->tx_headroom);
4236 	mgmt = skb_put_zero(skb, hdr_len);
4237 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4238 					  IEEE80211_STYPE_ACTION);
4239 
4240 	eth_broadcast_addr(mgmt->da);
4241 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4242 	if (ieee80211_vif_is_mesh(&sdata->vif)) {
4243 		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4244 	} else {
4245 		struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4246 		memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4247 	}
4248 	mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4249 	mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4250 	pos = skb_put(skb, 5);
4251 	*pos++ = WLAN_EID_CHANNEL_SWITCH;			/* EID */
4252 	*pos++ = 3;						/* IE length */
4253 	*pos++ = csa_settings->block_tx ? 1 : 0;		/* CSA mode */
4254 	freq = csa_settings->chandef.chan->center_freq;
4255 	*pos++ = ieee80211_frequency_to_channel(freq);		/* channel */
4256 	*pos++ = csa_settings->count;				/* count */
4257 
4258 	if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4259 		enum nl80211_channel_type ch_type;
4260 
4261 		skb_put(skb, 3);
4262 		*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;	/* EID */
4263 		*pos++ = 1;					/* IE length */
4264 		ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4265 		if (ch_type == NL80211_CHAN_HT40PLUS)
4266 			*pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4267 		else
4268 			*pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4269 	}
4270 
4271 	if (ieee80211_vif_is_mesh(&sdata->vif)) {
4272 		struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4273 
4274 		skb_put(skb, 8);
4275 		*pos++ = WLAN_EID_CHAN_SWITCH_PARAM;		/* EID */
4276 		*pos++ = 6;					/* IE length */
4277 		*pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;	/* Mesh TTL */
4278 		*pos = 0x00;	/* Mesh Flag: Tx Restrict, Initiator, Reason */
4279 		*pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4280 		*pos++ |= csa_settings->block_tx ?
4281 			  WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4282 		put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4283 		pos += 2;
4284 		put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4285 		pos += 2;
4286 	}
4287 
4288 	if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4289 	    csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4290 	    csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4291 		skb_put(skb, 5);
4292 		ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4293 	}
4294 
4295 	ieee80211_tx_skb(sdata, skb);
4296 	return 0;
4297 }
4298 
4299 static bool
ieee80211_extend_noa_desc(struct ieee80211_noa_data * data,u32 tsf,int i)4300 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4301 {
4302 	s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4303 	int skip;
4304 
4305 	if (end > 0)
4306 		return false;
4307 
4308 	/* One shot NOA  */
4309 	if (data->count[i] == 1)
4310 		return false;
4311 
4312 	if (data->desc[i].interval == 0)
4313 		return false;
4314 
4315 	/* End time is in the past, check for repetitions */
4316 	skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4317 	if (data->count[i] < 255) {
4318 		if (data->count[i] <= skip) {
4319 			data->count[i] = 0;
4320 			return false;
4321 		}
4322 
4323 		data->count[i] -= skip;
4324 	}
4325 
4326 	data->desc[i].start += skip * data->desc[i].interval;
4327 
4328 	return true;
4329 }
4330 
4331 static bool
ieee80211_extend_absent_time(struct ieee80211_noa_data * data,u32 tsf,s32 * offset)4332 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4333 			     s32 *offset)
4334 {
4335 	bool ret = false;
4336 	int i;
4337 
4338 	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4339 		s32 cur;
4340 
4341 		if (!data->count[i])
4342 			continue;
4343 
4344 		if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4345 			ret = true;
4346 
4347 		cur = data->desc[i].start - tsf;
4348 		if (cur > *offset)
4349 			continue;
4350 
4351 		cur = data->desc[i].start + data->desc[i].duration - tsf;
4352 		if (cur > *offset)
4353 			*offset = cur;
4354 	}
4355 
4356 	return ret;
4357 }
4358 
4359 static u32
ieee80211_get_noa_absent_time(struct ieee80211_noa_data * data,u32 tsf)4360 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4361 {
4362 	s32 offset = 0;
4363 	int tries = 0;
4364 	/*
4365 	 * arbitrary limit, used to avoid infinite loops when combined NoA
4366 	 * descriptors cover the full time period.
4367 	 */
4368 	int max_tries = 5;
4369 
4370 	ieee80211_extend_absent_time(data, tsf, &offset);
4371 	do {
4372 		if (!ieee80211_extend_absent_time(data, tsf, &offset))
4373 			break;
4374 
4375 		tries++;
4376 	} while (tries < max_tries);
4377 
4378 	return offset;
4379 }
4380 
ieee80211_update_p2p_noa(struct ieee80211_noa_data * data,u32 tsf)4381 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4382 {
4383 	u32 next_offset = BIT(31) - 1;
4384 	int i;
4385 
4386 	data->absent = 0;
4387 	data->has_next_tsf = false;
4388 	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4389 		s32 start;
4390 
4391 		if (!data->count[i])
4392 			continue;
4393 
4394 		ieee80211_extend_noa_desc(data, tsf, i);
4395 		start = data->desc[i].start - tsf;
4396 		if (start <= 0)
4397 			data->absent |= BIT(i);
4398 
4399 		if (next_offset > start)
4400 			next_offset = start;
4401 
4402 		data->has_next_tsf = true;
4403 	}
4404 
4405 	if (data->absent)
4406 		next_offset = ieee80211_get_noa_absent_time(data, tsf);
4407 
4408 	data->next_tsf = tsf + next_offset;
4409 }
4410 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4411 
ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr * attr,struct ieee80211_noa_data * data,u32 tsf)4412 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4413 			    struct ieee80211_noa_data *data, u32 tsf)
4414 {
4415 	int ret = 0;
4416 	int i;
4417 
4418 	memset(data, 0, sizeof(*data));
4419 
4420 	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4421 		const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4422 
4423 		if (!desc->count || !desc->duration)
4424 			continue;
4425 
4426 		data->count[i] = desc->count;
4427 		data->desc[i].start = le32_to_cpu(desc->start_time);
4428 		data->desc[i].duration = le32_to_cpu(desc->duration);
4429 		data->desc[i].interval = le32_to_cpu(desc->interval);
4430 
4431 		if (data->count[i] > 1 &&
4432 		    data->desc[i].interval < data->desc[i].duration)
4433 			continue;
4434 
4435 		ieee80211_extend_noa_desc(data, tsf, i);
4436 		ret++;
4437 	}
4438 
4439 	if (ret)
4440 		ieee80211_update_p2p_noa(data, tsf);
4441 
4442 	return ret;
4443 }
4444 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4445 
ieee80211_recalc_dtim(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)4446 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4447 			   struct ieee80211_sub_if_data *sdata)
4448 {
4449 	u64 tsf = drv_get_tsf(local, sdata);
4450 	u64 dtim_count = 0;
4451 	u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4452 	u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4453 	struct ps_data *ps;
4454 	u8 bcns_from_dtim;
4455 
4456 	if (tsf == -1ULL || !beacon_int || !dtim_period)
4457 		return;
4458 
4459 	if (sdata->vif.type == NL80211_IFTYPE_AP ||
4460 	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4461 		if (!sdata->bss)
4462 			return;
4463 
4464 		ps = &sdata->bss->ps;
4465 	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4466 		ps = &sdata->u.mesh.ps;
4467 	} else {
4468 		return;
4469 	}
4470 
4471 	/*
4472 	 * actually finds last dtim_count, mac80211 will update in
4473 	 * __beacon_add_tim().
4474 	 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4475 	 */
4476 	do_div(tsf, beacon_int);
4477 	bcns_from_dtim = do_div(tsf, dtim_period);
4478 	/* just had a DTIM */
4479 	if (!bcns_from_dtim)
4480 		dtim_count = 0;
4481 	else
4482 		dtim_count = dtim_period - bcns_from_dtim;
4483 
4484 	ps->dtim_count = dtim_count;
4485 }
4486 
ieee80211_chanctx_radar_detect(struct ieee80211_local * local,struct ieee80211_chanctx * ctx)4487 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4488 					 struct ieee80211_chanctx *ctx)
4489 {
4490 	struct ieee80211_link_data *link;
4491 	u8 radar_detect = 0;
4492 
4493 	lockdep_assert_held(&local->chanctx_mtx);
4494 
4495 	if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4496 		return 0;
4497 
4498 	list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4499 		if (link->reserved_radar_required)
4500 			radar_detect |= BIT(link->reserved_chandef.width);
4501 
4502 	/*
4503 	 * An in-place reservation context should not have any assigned vifs
4504 	 * until it replaces the other context.
4505 	 */
4506 	WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4507 		!list_empty(&ctx->assigned_links));
4508 
4509 	list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4510 		if (!link->radar_required)
4511 			continue;
4512 
4513 		radar_detect |=
4514 			BIT(link->conf->chandef.width);
4515 	}
4516 
4517 	return radar_detect;
4518 }
4519 
ieee80211_check_combinations(struct ieee80211_sub_if_data * sdata,const struct cfg80211_chan_def * chandef,enum ieee80211_chanctx_mode chanmode,u8 radar_detect)4520 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4521 				 const struct cfg80211_chan_def *chandef,
4522 				 enum ieee80211_chanctx_mode chanmode,
4523 				 u8 radar_detect)
4524 {
4525 	struct ieee80211_local *local = sdata->local;
4526 	struct ieee80211_sub_if_data *sdata_iter;
4527 	enum nl80211_iftype iftype = sdata->wdev.iftype;
4528 	struct ieee80211_chanctx *ctx;
4529 	int total = 1;
4530 	struct iface_combination_params params = {
4531 		.radar_detect = radar_detect,
4532 	};
4533 
4534 	lockdep_assert_held(&local->chanctx_mtx);
4535 
4536 	if (WARN_ON(hweight32(radar_detect) > 1))
4537 		return -EINVAL;
4538 
4539 	if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4540 		    !chandef->chan))
4541 		return -EINVAL;
4542 
4543 	if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4544 		return -EINVAL;
4545 
4546 	if (sdata->vif.type == NL80211_IFTYPE_AP ||
4547 	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4548 		/*
4549 		 * always passing this is harmless, since it'll be the
4550 		 * same value that cfg80211 finds if it finds the same
4551 		 * interface ... and that's always allowed
4552 		 */
4553 		params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4554 	}
4555 
4556 	/* Always allow software iftypes */
4557 	if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4558 		if (radar_detect)
4559 			return -EINVAL;
4560 		return 0;
4561 	}
4562 
4563 	if (chandef)
4564 		params.num_different_channels = 1;
4565 
4566 	if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4567 		params.iftype_num[iftype] = 1;
4568 
4569 	list_for_each_entry(ctx, &local->chanctx_list, list) {
4570 		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4571 			continue;
4572 		params.radar_detect |=
4573 			ieee80211_chanctx_radar_detect(local, ctx);
4574 		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4575 			params.num_different_channels++;
4576 			continue;
4577 		}
4578 		if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4579 		    cfg80211_chandef_compatible(chandef,
4580 						&ctx->conf.def))
4581 			continue;
4582 		params.num_different_channels++;
4583 	}
4584 
4585 	list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4586 		struct wireless_dev *wdev_iter;
4587 
4588 		wdev_iter = &sdata_iter->wdev;
4589 
4590 		if (sdata_iter == sdata ||
4591 		    !ieee80211_sdata_running(sdata_iter) ||
4592 		    cfg80211_iftype_allowed(local->hw.wiphy,
4593 					    wdev_iter->iftype, 0, 1))
4594 			continue;
4595 
4596 		params.iftype_num[wdev_iter->iftype]++;
4597 		total++;
4598 	}
4599 
4600 	if (total == 1 && !params.radar_detect)
4601 		return 0;
4602 
4603 	return cfg80211_check_combinations(local->hw.wiphy, &params);
4604 }
4605 
4606 static void
ieee80211_iter_max_chans(const struct ieee80211_iface_combination * c,void * data)4607 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4608 			 void *data)
4609 {
4610 	u32 *max_num_different_channels = data;
4611 
4612 	*max_num_different_channels = max(*max_num_different_channels,
4613 					  c->num_different_channels);
4614 }
4615 
ieee80211_max_num_channels(struct ieee80211_local * local)4616 int ieee80211_max_num_channels(struct ieee80211_local *local)
4617 {
4618 	struct ieee80211_sub_if_data *sdata;
4619 	struct ieee80211_chanctx *ctx;
4620 	u32 max_num_different_channels = 1;
4621 	int err;
4622 	struct iface_combination_params params = {0};
4623 
4624 	lockdep_assert_held(&local->chanctx_mtx);
4625 
4626 	list_for_each_entry(ctx, &local->chanctx_list, list) {
4627 		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4628 			continue;
4629 
4630 		params.num_different_channels++;
4631 
4632 		params.radar_detect |=
4633 			ieee80211_chanctx_radar_detect(local, ctx);
4634 	}
4635 
4636 	list_for_each_entry_rcu(sdata, &local->interfaces, list)
4637 		params.iftype_num[sdata->wdev.iftype]++;
4638 
4639 	err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4640 					 ieee80211_iter_max_chans,
4641 					 &max_num_different_channels);
4642 	if (err < 0)
4643 		return err;
4644 
4645 	return max_num_different_channels;
4646 }
4647 
ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_s1g_cap * caps,struct sk_buff * skb)4648 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4649 				struct ieee80211_sta_s1g_cap *caps,
4650 				struct sk_buff *skb)
4651 {
4652 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4653 	struct ieee80211_s1g_cap s1g_capab;
4654 	u8 *pos;
4655 	int i;
4656 
4657 	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4658 		return;
4659 
4660 	if (!caps->s1g)
4661 		return;
4662 
4663 	memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4664 	memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4665 
4666 	/* override the capability info */
4667 	for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4668 		u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4669 
4670 		s1g_capab.capab_info[i] &= ~mask;
4671 		s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4672 	}
4673 
4674 	/* then MCS and NSS set */
4675 	for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4676 		u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4677 
4678 		s1g_capab.supp_mcs_nss[i] &= ~mask;
4679 		s1g_capab.supp_mcs_nss[i] |=
4680 			ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4681 	}
4682 
4683 	pos = skb_put(skb, 2 + sizeof(s1g_capab));
4684 	*pos++ = WLAN_EID_S1G_CAPABILITIES;
4685 	*pos++ = sizeof(s1g_capab);
4686 
4687 	memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4688 }
4689 
ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)4690 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4691 				  struct sk_buff *skb)
4692 {
4693 	u8 *pos = skb_put(skb, 3);
4694 
4695 	*pos++ = WLAN_EID_AID_REQUEST;
4696 	*pos++ = 1;
4697 	*pos++ = 0;
4698 }
4699 
ieee80211_add_wmm_info_ie(u8 * buf,u8 qosinfo)4700 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4701 {
4702 	*buf++ = WLAN_EID_VENDOR_SPECIFIC;
4703 	*buf++ = 7; /* len */
4704 	*buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4705 	*buf++ = 0x50;
4706 	*buf++ = 0xf2;
4707 	*buf++ = 2; /* WME */
4708 	*buf++ = 0; /* WME info */
4709 	*buf++ = 1; /* WME ver */
4710 	*buf++ = qosinfo; /* U-APSD no in use */
4711 
4712 	return buf;
4713 }
4714 
ieee80211_txq_get_depth(struct ieee80211_txq * txq,unsigned long * frame_cnt,unsigned long * byte_cnt)4715 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4716 			     unsigned long *frame_cnt,
4717 			     unsigned long *byte_cnt)
4718 {
4719 	struct txq_info *txqi = to_txq_info(txq);
4720 	u32 frag_cnt = 0, frag_bytes = 0;
4721 	struct sk_buff *skb;
4722 
4723 	skb_queue_walk(&txqi->frags, skb) {
4724 		frag_cnt++;
4725 		frag_bytes += skb->len;
4726 	}
4727 
4728 	if (frame_cnt)
4729 		*frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4730 
4731 	if (byte_cnt)
4732 		*byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4733 }
4734 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4735 
4736 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4737 	IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4738 	IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4739 	IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4740 	IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4741 };
4742 
ieee80211_encode_usf(int listen_interval)4743 u16 ieee80211_encode_usf(int listen_interval)
4744 {
4745 	static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4746 	u16 ui, usf = 0;
4747 
4748 	/* find greatest USF */
4749 	while (usf < IEEE80211_MAX_USF) {
4750 		if (listen_interval % listen_int_usf[usf + 1])
4751 			break;
4752 		usf += 1;
4753 	}
4754 	ui = listen_interval / listen_int_usf[usf];
4755 
4756 	/* error if there is a remainder. Should've been checked by user */
4757 	WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4758 	listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4759 			  FIELD_PREP(LISTEN_INT_UI, ui);
4760 
4761 	return (u16) listen_interval;
4762 }
4763 
ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data * sdata,u8 iftype)4764 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4765 {
4766 	const struct ieee80211_sta_he_cap *he_cap;
4767 	const struct ieee80211_sta_eht_cap *eht_cap;
4768 	struct ieee80211_supported_band *sband;
4769 	bool is_ap;
4770 	u8 n;
4771 
4772 	sband = ieee80211_get_sband(sdata);
4773 	if (!sband)
4774 		return 0;
4775 
4776 	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4777 	eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4778 	if (!he_cap || !eht_cap)
4779 		return 0;
4780 
4781 	is_ap = iftype == NL80211_IFTYPE_AP ||
4782 		iftype == NL80211_IFTYPE_P2P_GO;
4783 
4784 	n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4785 				       &eht_cap->eht_cap_elem,
4786 				       is_ap);
4787 	return 2 + 1 +
4788 	       sizeof(he_cap->he_cap_elem) + n +
4789 	       ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4790 				      eht_cap->eht_cap_elem.phy_cap_info);
4791 	return 0;
4792 }
4793 
ieee80211_ie_build_eht_cap(u8 * pos,const struct ieee80211_sta_he_cap * he_cap,const struct ieee80211_sta_eht_cap * eht_cap,u8 * end,bool for_ap)4794 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
4795 			       const struct ieee80211_sta_he_cap *he_cap,
4796 			       const struct ieee80211_sta_eht_cap *eht_cap,
4797 			       u8 *end,
4798 			       bool for_ap)
4799 {
4800 	u8 mcs_nss_len, ppet_len;
4801 	u8 ie_len;
4802 	u8 *orig_pos = pos;
4803 
4804 	/* Make sure we have place for the IE */
4805 	if (!he_cap || !eht_cap)
4806 		return orig_pos;
4807 
4808 	mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4809 						 &eht_cap->eht_cap_elem,
4810 						 for_ap);
4811 	ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4812 					  eht_cap->eht_cap_elem.phy_cap_info);
4813 
4814 	ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4815 	if ((end - pos) < ie_len)
4816 		return orig_pos;
4817 
4818 	*pos++ = WLAN_EID_EXTENSION;
4819 	*pos++ = ie_len - 2;
4820 	*pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
4821 
4822 	/* Fixed data */
4823 	memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
4824 	pos += sizeof(eht_cap->eht_cap_elem);
4825 
4826 	memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4827 	pos += mcs_nss_len;
4828 
4829 	if (ppet_len) {
4830 		memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
4831 		pos += ppet_len;
4832 	}
4833 
4834 	return pos;
4835 }
4836 
ieee80211_fragment_element(struct sk_buff * skb,u8 * len_pos)4837 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
4838 {
4839 	unsigned int elem_len;
4840 
4841 	if (!len_pos)
4842 		return;
4843 
4844 	elem_len = skb->data + skb->len - len_pos - 1;
4845 
4846 	while (elem_len > 255) {
4847 		/* this one is 255 */
4848 		*len_pos = 255;
4849 		/* remaining data gets smaller */
4850 		elem_len -= 255;
4851 		/* make space for the fragment ID/len in SKB */
4852 		skb_put(skb, 2);
4853 		/* shift back the remaining data to place fragment ID/len */
4854 		memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
4855 		/* place the fragment ID */
4856 		len_pos += 255 + 1;
4857 		*len_pos = WLAN_EID_FRAGMENT;
4858 		/* and point to fragment length to update later */
4859 		len_pos++;
4860 	}
4861 
4862 	*len_pos = elem_len;
4863 }
4864