mac80211: call driver method when restart completes
[profile/ivi/kernel-adaptation-intel-automotive.git] / net / mac80211 / util.c
1 /*
2  * Copyright 2002-2005, Instant802 Networks, Inc.
3  * Copyright 2005-2006, Devicescape Software, Inc.
4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
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 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40 {
41         struct ieee80211_local *local;
42         BUG_ON(!wiphy);
43
44         local = wiphy_priv(wiphy);
45         return &local->hw;
46 }
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50                         enum nl80211_iftype type)
51 {
52         __le16 fc = hdr->frame_control;
53
54          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55         if (len < 16)
56                 return NULL;
57
58         if (ieee80211_is_data(fc)) {
59                 if (len < 24) /* drop incorrect hdr len (data) */
60                         return NULL;
61
62                 if (ieee80211_has_a4(fc))
63                         return NULL;
64                 if (ieee80211_has_tods(fc))
65                         return hdr->addr1;
66                 if (ieee80211_has_fromds(fc))
67                         return hdr->addr2;
68
69                 return hdr->addr3;
70         }
71
72         if (ieee80211_is_mgmt(fc)) {
73                 if (len < 24) /* drop incorrect hdr len (mgmt) */
74                         return NULL;
75                 return hdr->addr3;
76         }
77
78         if (ieee80211_is_ctl(fc)) {
79                 if(ieee80211_is_pspoll(fc))
80                         return hdr->addr1;
81
82                 if (ieee80211_is_back_req(fc)) {
83                         switch (type) {
84                         case NL80211_IFTYPE_STATION:
85                                 return hdr->addr2;
86                         case NL80211_IFTYPE_AP:
87                         case NL80211_IFTYPE_AP_VLAN:
88                                 return hdr->addr1;
89                         default:
90                                 break; /* fall through to the return */
91                         }
92                 }
93         }
94
95         return NULL;
96 }
97
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
99 {
100         struct sk_buff *skb;
101         struct ieee80211_hdr *hdr;
102
103         skb_queue_walk(&tx->skbs, skb) {
104                 hdr = (struct ieee80211_hdr *) skb->data;
105                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106         }
107 }
108
109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110                              int rate, int erp, int short_preamble)
111 {
112         int dur;
113
114         /* calculate duration (in microseconds, rounded up to next higher
115          * integer if it includes a fractional microsecond) to send frame of
116          * len bytes (does not include FCS) at the given rate. Duration will
117          * also include SIFS.
118          *
119          * rate is in 100 kbps, so divident is multiplied by 10 in the
120          * DIV_ROUND_UP() operations.
121          */
122
123         if (band == IEEE80211_BAND_5GHZ || erp) {
124                 /*
125                  * OFDM:
126                  *
127                  * N_DBPS = DATARATE x 4
128                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129                  *      (16 = SIGNAL time, 6 = tail bits)
130                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131                  *
132                  * T_SYM = 4 usec
133                  * 802.11a - 17.5.2: aSIFSTime = 16 usec
134                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135                  *      signal ext = 6 usec
136                  */
137                 dur = 16; /* SIFS + signal ext */
138                 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139                 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141                                         4 * rate); /* T_SYM x N_SYM */
142         } else {
143                 /*
144                  * 802.11b or 802.11g with 802.11b compatibility:
145                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
147                  *
148                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149                  * aSIFSTime = 10 usec
150                  * aPreambleLength = 144 usec or 72 usec with short preamble
151                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
152                  */
153                 dur = 10; /* aSIFSTime = 10 usec */
154                 dur += short_preamble ? (72 + 24) : (144 + 48);
155
156                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
157         }
158
159         return dur;
160 }
161
162 /* Exported duration function for driver use */
163 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164                                         struct ieee80211_vif *vif,
165                                         enum ieee80211_band band,
166                                         size_t frame_len,
167                                         struct ieee80211_rate *rate)
168 {
169         struct ieee80211_sub_if_data *sdata;
170         u16 dur;
171         int erp;
172         bool short_preamble = false;
173
174         erp = 0;
175         if (vif) {
176                 sdata = vif_to_sdata(vif);
177                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
178                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179                         erp = rate->flags & IEEE80211_RATE_ERP_G;
180         }
181
182         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
183                                        short_preamble);
184
185         return cpu_to_le16(dur);
186 }
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
188
189 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190                               struct ieee80211_vif *vif, size_t frame_len,
191                               const struct ieee80211_tx_info *frame_txctl)
192 {
193         struct ieee80211_local *local = hw_to_local(hw);
194         struct ieee80211_rate *rate;
195         struct ieee80211_sub_if_data *sdata;
196         bool short_preamble;
197         int erp;
198         u16 dur;
199         struct ieee80211_supported_band *sband;
200
201         sband = local->hw.wiphy->bands[frame_txctl->band];
202
203         short_preamble = false;
204
205         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
206
207         erp = 0;
208         if (vif) {
209                 sdata = vif_to_sdata(vif);
210                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
211                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212                         erp = rate->flags & IEEE80211_RATE_ERP_G;
213         }
214
215         /* CTS duration */
216         dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
217                                        erp, short_preamble);
218         /* Data frame duration */
219         dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
220                                         erp, short_preamble);
221         /* ACK duration */
222         dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
223                                         erp, short_preamble);
224
225         return cpu_to_le16(dur);
226 }
227 EXPORT_SYMBOL(ieee80211_rts_duration);
228
229 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230                                     struct ieee80211_vif *vif,
231                                     size_t frame_len,
232                                     const struct ieee80211_tx_info *frame_txctl)
233 {
234         struct ieee80211_local *local = hw_to_local(hw);
235         struct ieee80211_rate *rate;
236         struct ieee80211_sub_if_data *sdata;
237         bool short_preamble;
238         int erp;
239         u16 dur;
240         struct ieee80211_supported_band *sband;
241
242         sband = local->hw.wiphy->bands[frame_txctl->band];
243
244         short_preamble = false;
245
246         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
247         erp = 0;
248         if (vif) {
249                 sdata = vif_to_sdata(vif);
250                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
251                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252                         erp = rate->flags & IEEE80211_RATE_ERP_G;
253         }
254
255         /* Data frame duration */
256         dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
257                                        erp, short_preamble);
258         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
259                 /* ACK duration */
260                 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
261                                                 erp, short_preamble);
262         }
263
264         return cpu_to_le16(dur);
265 }
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
268 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
269 {
270         struct ieee80211_sub_if_data *sdata;
271         int n_acs = IEEE80211_NUM_ACS;
272
273         if (local->hw.queues < IEEE80211_NUM_ACS)
274                 n_acs = 1;
275
276         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
277                 int ac;
278
279                 if (!sdata->dev)
280                         continue;
281
282                 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
283                         continue;
284
285                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
287                         continue;
288
289                 for (ac = 0; ac < n_acs; ac++) {
290                         int ac_queue = sdata->vif.hw_queue[ac];
291
292                         if (ac_queue == queue ||
293                             (sdata->vif.cab_queue == queue &&
294                              local->queue_stop_reasons[ac_queue] == 0 &&
295                              skb_queue_empty(&local->pending[ac_queue])))
296                                 netif_wake_subqueue(sdata->dev, ac);
297                 }
298         }
299 }
300
301 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302                                    enum queue_stop_reason reason)
303 {
304         struct ieee80211_local *local = hw_to_local(hw);
305
306         trace_wake_queue(local, queue, reason);
307
308         if (WARN_ON(queue >= hw->queues))
309                 return;
310
311         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
312                 return;
313
314         __clear_bit(reason, &local->queue_stop_reasons[queue]);
315
316         if (local->queue_stop_reasons[queue] != 0)
317                 /* someone still has this queue stopped */
318                 return;
319
320         if (skb_queue_empty(&local->pending[queue])) {
321                 rcu_read_lock();
322                 ieee80211_propagate_queue_wake(local, queue);
323                 rcu_read_unlock();
324         } else
325                 tasklet_schedule(&local->tx_pending_tasklet);
326 }
327
328 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329                                     enum queue_stop_reason reason)
330 {
331         struct ieee80211_local *local = hw_to_local(hw);
332         unsigned long flags;
333
334         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335         __ieee80211_wake_queue(hw, queue, reason);
336         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
337 }
338
339 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
340 {
341         ieee80211_wake_queue_by_reason(hw, queue,
342                                        IEEE80211_QUEUE_STOP_REASON_DRIVER);
343 }
344 EXPORT_SYMBOL(ieee80211_wake_queue);
345
346 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347                                    enum queue_stop_reason reason)
348 {
349         struct ieee80211_local *local = hw_to_local(hw);
350         struct ieee80211_sub_if_data *sdata;
351         int n_acs = IEEE80211_NUM_ACS;
352
353         trace_stop_queue(local, queue, reason);
354
355         if (WARN_ON(queue >= hw->queues))
356                 return;
357
358         if (test_bit(reason, &local->queue_stop_reasons[queue]))
359                 return;
360
361         __set_bit(reason, &local->queue_stop_reasons[queue]);
362
363         if (local->hw.queues < IEEE80211_NUM_ACS)
364                 n_acs = 1;
365
366         rcu_read_lock();
367         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368                 int ac;
369
370                 if (!sdata->dev)
371                         continue;
372
373                 for (ac = 0; ac < n_acs; ac++) {
374                         if (sdata->vif.hw_queue[ac] == queue ||
375                             sdata->vif.cab_queue == queue)
376                                 netif_stop_subqueue(sdata->dev, ac);
377                 }
378         }
379         rcu_read_unlock();
380 }
381
382 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383                                     enum queue_stop_reason reason)
384 {
385         struct ieee80211_local *local = hw_to_local(hw);
386         unsigned long flags;
387
388         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389         __ieee80211_stop_queue(hw, queue, reason);
390         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391 }
392
393 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
394 {
395         ieee80211_stop_queue_by_reason(hw, queue,
396                                        IEEE80211_QUEUE_STOP_REASON_DRIVER);
397 }
398 EXPORT_SYMBOL(ieee80211_stop_queue);
399
400 void ieee80211_add_pending_skb(struct ieee80211_local *local,
401                                struct sk_buff *skb)
402 {
403         struct ieee80211_hw *hw = &local->hw;
404         unsigned long flags;
405         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
406         int queue = info->hw_queue;
407
408         if (WARN_ON(!info->control.vif)) {
409                 ieee80211_free_txskb(&local->hw, skb);
410                 return;
411         }
412
413         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
415         __skb_queue_tail(&local->pending[queue], skb);
416         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418 }
419
420 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421                                    struct sk_buff_head *skbs,
422                                    void (*fn)(void *data), void *data)
423 {
424         struct ieee80211_hw *hw = &local->hw;
425         struct sk_buff *skb;
426         unsigned long flags;
427         int queue, i;
428
429         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
430         while ((skb = skb_dequeue(skbs))) {
431                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432
433                 if (WARN_ON(!info->control.vif)) {
434                         ieee80211_free_txskb(&local->hw, skb);
435                         continue;
436                 }
437
438                 queue = info->hw_queue;
439
440                 __ieee80211_stop_queue(hw, queue,
441                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
442
443                 __skb_queue_tail(&local->pending[queue], skb);
444         }
445
446         if (fn)
447                 fn(data);
448
449         for (i = 0; i < hw->queues; i++)
450                 __ieee80211_wake_queue(hw, i,
451                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
452         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
453 }
454
455 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
456                                     enum queue_stop_reason reason)
457 {
458         struct ieee80211_local *local = hw_to_local(hw);
459         unsigned long flags;
460         int i;
461
462         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
463
464         for (i = 0; i < hw->queues; i++)
465                 __ieee80211_stop_queue(hw, i, reason);
466
467         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
468 }
469
470 void ieee80211_stop_queues(struct ieee80211_hw *hw)
471 {
472         ieee80211_stop_queues_by_reason(hw,
473                                         IEEE80211_QUEUE_STOP_REASON_DRIVER);
474 }
475 EXPORT_SYMBOL(ieee80211_stop_queues);
476
477 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
478 {
479         struct ieee80211_local *local = hw_to_local(hw);
480         unsigned long flags;
481         int ret;
482
483         if (WARN_ON(queue >= hw->queues))
484                 return true;
485
486         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487         ret = !!local->queue_stop_reasons[queue];
488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489         return ret;
490 }
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494                                      enum queue_stop_reason reason)
495 {
496         struct ieee80211_local *local = hw_to_local(hw);
497         unsigned long flags;
498         int i;
499
500         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
502         for (i = 0; i < hw->queues; i++)
503                 __ieee80211_wake_queue(hw, i, reason);
504
505         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506 }
507
508 void ieee80211_wake_queues(struct ieee80211_hw *hw)
509 {
510         ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
511 }
512 EXPORT_SYMBOL(ieee80211_wake_queues);
513
514 void ieee80211_iterate_active_interfaces(
515         struct ieee80211_hw *hw,
516         void (*iterator)(void *data, u8 *mac,
517                          struct ieee80211_vif *vif),
518         void *data)
519 {
520         struct ieee80211_local *local = hw_to_local(hw);
521         struct ieee80211_sub_if_data *sdata;
522
523         mutex_lock(&local->iflist_mtx);
524
525         list_for_each_entry(sdata, &local->interfaces, list) {
526                 switch (sdata->vif.type) {
527                 case NL80211_IFTYPE_MONITOR:
528                 case NL80211_IFTYPE_AP_VLAN:
529                         continue;
530                 default:
531                         break;
532                 }
533                 if (ieee80211_sdata_running(sdata))
534                         iterator(data, sdata->vif.addr,
535                                  &sdata->vif);
536         }
537
538         sdata = rcu_dereference_protected(local->monitor_sdata,
539                                           lockdep_is_held(&local->iflist_mtx));
540         if (sdata)
541                 iterator(data, sdata->vif.addr, &sdata->vif);
542
543         mutex_unlock(&local->iflist_mtx);
544 }
545 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
546
547 void ieee80211_iterate_active_interfaces_atomic(
548         struct ieee80211_hw *hw,
549         void (*iterator)(void *data, u8 *mac,
550                          struct ieee80211_vif *vif),
551         void *data)
552 {
553         struct ieee80211_local *local = hw_to_local(hw);
554         struct ieee80211_sub_if_data *sdata;
555
556         rcu_read_lock();
557
558         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
559                 switch (sdata->vif.type) {
560                 case NL80211_IFTYPE_MONITOR:
561                 case NL80211_IFTYPE_AP_VLAN:
562                         continue;
563                 default:
564                         break;
565                 }
566                 if (ieee80211_sdata_running(sdata))
567                         iterator(data, sdata->vif.addr,
568                                  &sdata->vif);
569         }
570
571         sdata = rcu_dereference(local->monitor_sdata);
572         if (sdata)
573                 iterator(data, sdata->vif.addr, &sdata->vif);
574
575         rcu_read_unlock();
576 }
577 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
578
579 /*
580  * Nothing should have been stuffed into the workqueue during
581  * the suspend->resume cycle. If this WARN is seen then there
582  * is a bug with either the driver suspend or something in
583  * mac80211 stuffing into the workqueue which we haven't yet
584  * cleared during mac80211's suspend cycle.
585  */
586 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
587 {
588         if (WARN(local->suspended && !local->resuming,
589                  "queueing ieee80211 work while going to suspend\n"))
590                 return false;
591
592         return true;
593 }
594
595 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
596 {
597         struct ieee80211_local *local = hw_to_local(hw);
598
599         if (!ieee80211_can_queue_work(local))
600                 return;
601
602         queue_work(local->workqueue, work);
603 }
604 EXPORT_SYMBOL(ieee80211_queue_work);
605
606 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
607                                   struct delayed_work *dwork,
608                                   unsigned long delay)
609 {
610         struct ieee80211_local *local = hw_to_local(hw);
611
612         if (!ieee80211_can_queue_work(local))
613                 return;
614
615         queue_delayed_work(local->workqueue, dwork, delay);
616 }
617 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
618
619 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
620                                struct ieee802_11_elems *elems,
621                                u64 filter, u32 crc)
622 {
623         size_t left = len;
624         u8 *pos = start;
625         bool calc_crc = filter != 0;
626         DECLARE_BITMAP(seen_elems, 256);
627
628         bitmap_zero(seen_elems, 256);
629         memset(elems, 0, sizeof(*elems));
630         elems->ie_start = start;
631         elems->total_len = len;
632
633         while (left >= 2) {
634                 u8 id, elen;
635                 bool elem_parse_failed;
636
637                 id = *pos++;
638                 elen = *pos++;
639                 left -= 2;
640
641                 if (elen > left) {
642                         elems->parse_error = true;
643                         break;
644                 }
645
646                 switch (id) {
647                 case WLAN_EID_SSID:
648                 case WLAN_EID_SUPP_RATES:
649                 case WLAN_EID_FH_PARAMS:
650                 case WLAN_EID_DS_PARAMS:
651                 case WLAN_EID_CF_PARAMS:
652                 case WLAN_EID_TIM:
653                 case WLAN_EID_IBSS_PARAMS:
654                 case WLAN_EID_CHALLENGE:
655                 case WLAN_EID_RSN:
656                 case WLAN_EID_ERP_INFO:
657                 case WLAN_EID_EXT_SUPP_RATES:
658                 case WLAN_EID_HT_CAPABILITY:
659                 case WLAN_EID_HT_OPERATION:
660                 case WLAN_EID_VHT_CAPABILITY:
661                 case WLAN_EID_VHT_OPERATION:
662                 case WLAN_EID_MESH_ID:
663                 case WLAN_EID_MESH_CONFIG:
664                 case WLAN_EID_PEER_MGMT:
665                 case WLAN_EID_PREQ:
666                 case WLAN_EID_PREP:
667                 case WLAN_EID_PERR:
668                 case WLAN_EID_RANN:
669                 case WLAN_EID_CHANNEL_SWITCH:
670                 case WLAN_EID_EXT_CHANSWITCH_ANN:
671                 case WLAN_EID_COUNTRY:
672                 case WLAN_EID_PWR_CONSTRAINT:
673                 case WLAN_EID_TIMEOUT_INTERVAL:
674                         if (test_bit(id, seen_elems)) {
675                                 elems->parse_error = true;
676                                 left -= elen;
677                                 pos += elen;
678                                 continue;
679                         }
680                         break;
681                 }
682
683                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
684                         crc = crc32_be(crc, pos - 2, elen + 2);
685
686                 elem_parse_failed = false;
687
688                 switch (id) {
689                 case WLAN_EID_SSID:
690                         elems->ssid = pos;
691                         elems->ssid_len = elen;
692                         break;
693                 case WLAN_EID_SUPP_RATES:
694                         elems->supp_rates = pos;
695                         elems->supp_rates_len = elen;
696                         break;
697                 case WLAN_EID_FH_PARAMS:
698                         elems->fh_params = pos;
699                         elems->fh_params_len = elen;
700                         break;
701                 case WLAN_EID_DS_PARAMS:
702                         elems->ds_params = pos;
703                         elems->ds_params_len = elen;
704                         break;
705                 case WLAN_EID_CF_PARAMS:
706                         elems->cf_params = pos;
707                         elems->cf_params_len = elen;
708                         break;
709                 case WLAN_EID_TIM:
710                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
711                                 elems->tim = (void *)pos;
712                                 elems->tim_len = elen;
713                         } else
714                                 elem_parse_failed = true;
715                         break;
716                 case WLAN_EID_IBSS_PARAMS:
717                         elems->ibss_params = pos;
718                         elems->ibss_params_len = elen;
719                         break;
720                 case WLAN_EID_CHALLENGE:
721                         elems->challenge = pos;
722                         elems->challenge_len = elen;
723                         break;
724                 case WLAN_EID_VENDOR_SPECIFIC:
725                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
726                             pos[2] == 0xf2) {
727                                 /* Microsoft OUI (00:50:F2) */
728
729                                 if (calc_crc)
730                                         crc = crc32_be(crc, pos - 2, elen + 2);
731
732                                 if (pos[3] == 1) {
733                                         /* OUI Type 1 - WPA IE */
734                                         elems->wpa = pos;
735                                         elems->wpa_len = elen;
736                                 } else if (elen >= 5 && pos[3] == 2) {
737                                         /* OUI Type 2 - WMM IE */
738                                         if (pos[4] == 0) {
739                                                 elems->wmm_info = pos;
740                                                 elems->wmm_info_len = elen;
741                                         } else if (pos[4] == 1) {
742                                                 elems->wmm_param = pos;
743                                                 elems->wmm_param_len = elen;
744                                         }
745                                 }
746                         }
747                         break;
748                 case WLAN_EID_RSN:
749                         elems->rsn = pos;
750                         elems->rsn_len = elen;
751                         break;
752                 case WLAN_EID_ERP_INFO:
753                         elems->erp_info = pos;
754                         elems->erp_info_len = elen;
755                         break;
756                 case WLAN_EID_EXT_SUPP_RATES:
757                         elems->ext_supp_rates = pos;
758                         elems->ext_supp_rates_len = elen;
759                         break;
760                 case WLAN_EID_HT_CAPABILITY:
761                         if (elen >= sizeof(struct ieee80211_ht_cap))
762                                 elems->ht_cap_elem = (void *)pos;
763                         else
764                                 elem_parse_failed = true;
765                         break;
766                 case WLAN_EID_HT_OPERATION:
767                         if (elen >= sizeof(struct ieee80211_ht_operation))
768                                 elems->ht_operation = (void *)pos;
769                         else
770                                 elem_parse_failed = true;
771                         break;
772                 case WLAN_EID_VHT_CAPABILITY:
773                         if (elen >= sizeof(struct ieee80211_vht_cap))
774                                 elems->vht_cap_elem = (void *)pos;
775                         else
776                                 elem_parse_failed = true;
777                         break;
778                 case WLAN_EID_VHT_OPERATION:
779                         if (elen >= sizeof(struct ieee80211_vht_operation))
780                                 elems->vht_operation = (void *)pos;
781                         else
782                                 elem_parse_failed = true;
783                         break;
784                 case WLAN_EID_MESH_ID:
785                         elems->mesh_id = pos;
786                         elems->mesh_id_len = elen;
787                         break;
788                 case WLAN_EID_MESH_CONFIG:
789                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
790                                 elems->mesh_config = (void *)pos;
791                         else
792                                 elem_parse_failed = true;
793                         break;
794                 case WLAN_EID_PEER_MGMT:
795                         elems->peering = pos;
796                         elems->peering_len = elen;
797                         break;
798                 case WLAN_EID_PREQ:
799                         elems->preq = pos;
800                         elems->preq_len = elen;
801                         break;
802                 case WLAN_EID_PREP:
803                         elems->prep = pos;
804                         elems->prep_len = elen;
805                         break;
806                 case WLAN_EID_PERR:
807                         elems->perr = pos;
808                         elems->perr_len = elen;
809                         break;
810                 case WLAN_EID_RANN:
811                         if (elen >= sizeof(struct ieee80211_rann_ie))
812                                 elems->rann = (void *)pos;
813                         else
814                                 elem_parse_failed = true;
815                         break;
816                 case WLAN_EID_CHANNEL_SWITCH:
817                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
818                                 elem_parse_failed = true;
819                                 break;
820                         }
821                         elems->ch_switch_ie = (void *)pos;
822                         break;
823                 case WLAN_EID_QUIET:
824                         if (!elems->quiet_elem) {
825                                 elems->quiet_elem = pos;
826                                 elems->quiet_elem_len = elen;
827                         }
828                         elems->num_of_quiet_elem++;
829                         break;
830                 case WLAN_EID_COUNTRY:
831                         elems->country_elem = pos;
832                         elems->country_elem_len = elen;
833                         break;
834                 case WLAN_EID_PWR_CONSTRAINT:
835                         if (elen != 1) {
836                                 elem_parse_failed = true;
837                                 break;
838                         }
839                         elems->pwr_constr_elem = pos;
840                         break;
841                 case WLAN_EID_TIMEOUT_INTERVAL:
842                         elems->timeout_int = pos;
843                         elems->timeout_int_len = elen;
844                         break;
845                 default:
846                         break;
847                 }
848
849                 if (elem_parse_failed)
850                         elems->parse_error = true;
851                 else
852                         __set_bit(id, seen_elems);
853
854                 left -= elen;
855                 pos += elen;
856         }
857
858         if (left != 0)
859                 elems->parse_error = true;
860
861         return crc;
862 }
863
864 void ieee802_11_parse_elems(u8 *start, size_t len,
865                             struct ieee802_11_elems *elems)
866 {
867         ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
868 }
869
870 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
871                                bool bss_notify)
872 {
873         struct ieee80211_local *local = sdata->local;
874         struct ieee80211_tx_queue_params qparam;
875         struct ieee80211_chanctx_conf *chanctx_conf;
876         int ac;
877         bool use_11b, enable_qos;
878         int aCWmin, aCWmax;
879
880         if (!local->ops->conf_tx)
881                 return;
882
883         if (local->hw.queues < IEEE80211_NUM_ACS)
884                 return;
885
886         memset(&qparam, 0, sizeof(qparam));
887
888         rcu_read_lock();
889         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
890         use_11b = (chanctx_conf &&
891                    chanctx_conf->channel->band == IEEE80211_BAND_2GHZ) &&
892                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
893         rcu_read_unlock();
894
895         /*
896          * By default disable QoS in STA mode for old access points, which do
897          * not support 802.11e. New APs will provide proper queue parameters,
898          * that we will configure later.
899          */
900         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
901
902         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
903                 /* Set defaults according to 802.11-2007 Table 7-37 */
904                 aCWmax = 1023;
905                 if (use_11b)
906                         aCWmin = 31;
907                 else
908                         aCWmin = 15;
909
910                 if (enable_qos) {
911                         switch (ac) {
912                         case IEEE80211_AC_BK:
913                                 qparam.cw_max = aCWmax;
914                                 qparam.cw_min = aCWmin;
915                                 qparam.txop = 0;
916                                 qparam.aifs = 7;
917                                 break;
918                         /* never happens but let's not leave undefined */
919                         default:
920                         case IEEE80211_AC_BE:
921                                 qparam.cw_max = aCWmax;
922                                 qparam.cw_min = aCWmin;
923                                 qparam.txop = 0;
924                                 qparam.aifs = 3;
925                                 break;
926                         case IEEE80211_AC_VI:
927                                 qparam.cw_max = aCWmin;
928                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
929                                 if (use_11b)
930                                         qparam.txop = 6016/32;
931                                 else
932                                         qparam.txop = 3008/32;
933                                 qparam.aifs = 2;
934                                 break;
935                         case IEEE80211_AC_VO:
936                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
937                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
938                                 if (use_11b)
939                                         qparam.txop = 3264/32;
940                                 else
941                                         qparam.txop = 1504/32;
942                                 qparam.aifs = 2;
943                                 break;
944                         }
945                 } else {
946                         /* Confiure old 802.11b/g medium access rules. */
947                         qparam.cw_max = aCWmax;
948                         qparam.cw_min = aCWmin;
949                         qparam.txop = 0;
950                         qparam.aifs = 2;
951                 }
952
953                 qparam.uapsd = false;
954
955                 sdata->tx_conf[ac] = qparam;
956                 drv_conf_tx(local, sdata, ac, &qparam);
957         }
958
959         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
960             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
961                 sdata->vif.bss_conf.qos = enable_qos;
962                 if (bss_notify)
963                         ieee80211_bss_info_change_notify(sdata,
964                                                          BSS_CHANGED_QOS);
965         }
966 }
967
968 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
969                                   const size_t supp_rates_len,
970                                   const u8 *supp_rates)
971 {
972         struct ieee80211_chanctx_conf *chanctx_conf;
973         int i, have_higher_than_11mbit = 0;
974
975         /* cf. IEEE 802.11 9.2.12 */
976         for (i = 0; i < supp_rates_len; i++)
977                 if ((supp_rates[i] & 0x7f) * 5 > 110)
978                         have_higher_than_11mbit = 1;
979
980         rcu_read_lock();
981         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
982
983         if (chanctx_conf &&
984             chanctx_conf->channel->band == IEEE80211_BAND_2GHZ &&
985             have_higher_than_11mbit)
986                 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
987         else
988                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
989         rcu_read_unlock();
990
991         ieee80211_set_wmm_default(sdata, true);
992 }
993
994 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
995                               enum ieee80211_band band)
996 {
997         struct ieee80211_supported_band *sband;
998         struct ieee80211_rate *bitrates;
999         u32 mandatory_rates;
1000         enum ieee80211_rate_flags mandatory_flag;
1001         int i;
1002
1003         sband = local->hw.wiphy->bands[band];
1004         if (WARN_ON(!sband))
1005                 return 1;
1006
1007         if (band == IEEE80211_BAND_2GHZ)
1008                 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1009         else
1010                 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1011
1012         bitrates = sband->bitrates;
1013         mandatory_rates = 0;
1014         for (i = 0; i < sband->n_bitrates; i++)
1015                 if (bitrates[i].flags & mandatory_flag)
1016                         mandatory_rates |= BIT(i);
1017         return mandatory_rates;
1018 }
1019
1020 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1021                          u16 transaction, u16 auth_alg, u16 status,
1022                          u8 *extra, size_t extra_len, const u8 *da,
1023                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
1024 {
1025         struct ieee80211_local *local = sdata->local;
1026         struct sk_buff *skb;
1027         struct ieee80211_mgmt *mgmt;
1028         int err;
1029
1030         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1031                             sizeof(*mgmt) + 6 + extra_len);
1032         if (!skb)
1033                 return;
1034
1035         skb_reserve(skb, local->hw.extra_tx_headroom);
1036
1037         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1038         memset(mgmt, 0, 24 + 6);
1039         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1040                                           IEEE80211_STYPE_AUTH);
1041         memcpy(mgmt->da, da, ETH_ALEN);
1042         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1043         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1044         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1045         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1046         mgmt->u.auth.status_code = cpu_to_le16(status);
1047         if (extra)
1048                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1049
1050         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1051                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1052                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1053                 WARN_ON(err);
1054         }
1055
1056         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1057         ieee80211_tx_skb(sdata, skb);
1058 }
1059
1060 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1061                                     const u8 *bssid, u16 stype, u16 reason,
1062                                     bool send_frame, u8 *frame_buf)
1063 {
1064         struct ieee80211_local *local = sdata->local;
1065         struct sk_buff *skb;
1066         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1067
1068         /* build frame */
1069         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1070         mgmt->duration = 0; /* initialize only */
1071         mgmt->seq_ctrl = 0; /* initialize only */
1072         memcpy(mgmt->da, bssid, ETH_ALEN);
1073         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1074         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1075         /* u.deauth.reason_code == u.disassoc.reason_code */
1076         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1077
1078         if (send_frame) {
1079                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1080                                     IEEE80211_DEAUTH_FRAME_LEN);
1081                 if (!skb)
1082                         return;
1083
1084                 skb_reserve(skb, local->hw.extra_tx_headroom);
1085
1086                 /* copy in frame */
1087                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1088                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1089
1090                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1091                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1092                         IEEE80211_SKB_CB(skb)->flags |=
1093                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1094
1095                 ieee80211_tx_skb(sdata, skb);
1096         }
1097 }
1098
1099 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1100                              const u8 *ie, size_t ie_len,
1101                              enum ieee80211_band band, u32 rate_mask,
1102                              u8 channel)
1103 {
1104         struct ieee80211_supported_band *sband;
1105         u8 *pos;
1106         size_t offset = 0, noffset;
1107         int supp_rates_len, i;
1108         u8 rates[32];
1109         int num_rates;
1110         int ext_rates_len;
1111
1112         sband = local->hw.wiphy->bands[band];
1113         if (WARN_ON_ONCE(!sband))
1114                 return 0;
1115
1116         pos = buffer;
1117
1118         num_rates = 0;
1119         for (i = 0; i < sband->n_bitrates; i++) {
1120                 if ((BIT(i) & rate_mask) == 0)
1121                         continue; /* skip rate */
1122                 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1123         }
1124
1125         supp_rates_len = min_t(int, num_rates, 8);
1126
1127         *pos++ = WLAN_EID_SUPP_RATES;
1128         *pos++ = supp_rates_len;
1129         memcpy(pos, rates, supp_rates_len);
1130         pos += supp_rates_len;
1131
1132         /* insert "request information" if in custom IEs */
1133         if (ie && ie_len) {
1134                 static const u8 before_extrates[] = {
1135                         WLAN_EID_SSID,
1136                         WLAN_EID_SUPP_RATES,
1137                         WLAN_EID_REQUEST,
1138                 };
1139                 noffset = ieee80211_ie_split(ie, ie_len,
1140                                              before_extrates,
1141                                              ARRAY_SIZE(before_extrates),
1142                                              offset);
1143                 memcpy(pos, ie + offset, noffset - offset);
1144                 pos += noffset - offset;
1145                 offset = noffset;
1146         }
1147
1148         ext_rates_len = num_rates - supp_rates_len;
1149         if (ext_rates_len > 0) {
1150                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1151                 *pos++ = ext_rates_len;
1152                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1153                 pos += ext_rates_len;
1154         }
1155
1156         if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1157                 *pos++ = WLAN_EID_DS_PARAMS;
1158                 *pos++ = 1;
1159                 *pos++ = channel;
1160         }
1161
1162         /* insert custom IEs that go before HT */
1163         if (ie && ie_len) {
1164                 static const u8 before_ht[] = {
1165                         WLAN_EID_SSID,
1166                         WLAN_EID_SUPP_RATES,
1167                         WLAN_EID_REQUEST,
1168                         WLAN_EID_EXT_SUPP_RATES,
1169                         WLAN_EID_DS_PARAMS,
1170                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1171                 };
1172                 noffset = ieee80211_ie_split(ie, ie_len,
1173                                              before_ht, ARRAY_SIZE(before_ht),
1174                                              offset);
1175                 memcpy(pos, ie + offset, noffset - offset);
1176                 pos += noffset - offset;
1177                 offset = noffset;
1178         }
1179
1180         if (sband->ht_cap.ht_supported)
1181                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1182                                                 sband->ht_cap.cap);
1183
1184         /*
1185          * If adding more here, adjust code in main.c
1186          * that calculates local->scan_ies_len.
1187          */
1188
1189         /* add any remaining custom IEs */
1190         if (ie && ie_len) {
1191                 noffset = ie_len;
1192                 memcpy(pos, ie + offset, noffset - offset);
1193                 pos += noffset - offset;
1194         }
1195
1196         if (sband->vht_cap.vht_supported)
1197                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1198                                                  sband->vht_cap.cap);
1199
1200         return pos - buffer;
1201 }
1202
1203 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1204                                           u8 *dst, u32 ratemask,
1205                                           struct ieee80211_channel *chan,
1206                                           const u8 *ssid, size_t ssid_len,
1207                                           const u8 *ie, size_t ie_len,
1208                                           bool directed)
1209 {
1210         struct ieee80211_local *local = sdata->local;
1211         struct sk_buff *skb;
1212         struct ieee80211_mgmt *mgmt;
1213         size_t buf_len;
1214         u8 *buf;
1215         u8 chan_no;
1216
1217         /* FIXME: come up with a proper value */
1218         buf = kmalloc(200 + ie_len, GFP_KERNEL);
1219         if (!buf)
1220                 return NULL;
1221
1222         /*
1223          * Do not send DS Channel parameter for directed probe requests
1224          * in order to maximize the chance that we get a response.  Some
1225          * badly-behaved APs don't respond when this parameter is included.
1226          */
1227         if (directed)
1228                 chan_no = 0;
1229         else
1230                 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1231
1232         buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
1233                                            ratemask, chan_no);
1234
1235         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1236                                      ssid, ssid_len,
1237                                      buf, buf_len);
1238         if (!skb)
1239                 goto out;
1240
1241         if (dst) {
1242                 mgmt = (struct ieee80211_mgmt *) skb->data;
1243                 memcpy(mgmt->da, dst, ETH_ALEN);
1244                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1245         }
1246
1247         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1248
1249  out:
1250         kfree(buf);
1251
1252         return skb;
1253 }
1254
1255 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1256                               const u8 *ssid, size_t ssid_len,
1257                               const u8 *ie, size_t ie_len,
1258                               u32 ratemask, bool directed, bool no_cck,
1259                               struct ieee80211_channel *channel, bool scan)
1260 {
1261         struct sk_buff *skb;
1262
1263         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1264                                         ssid, ssid_len,
1265                                         ie, ie_len, directed);
1266         if (skb) {
1267                 if (no_cck)
1268                         IEEE80211_SKB_CB(skb)->flags |=
1269                                 IEEE80211_TX_CTL_NO_CCK_RATE;
1270                 if (scan)
1271                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1272                 else
1273                         ieee80211_tx_skb(sdata, skb);
1274         }
1275 }
1276
1277 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1278                             struct ieee802_11_elems *elems,
1279                             enum ieee80211_band band, u32 *basic_rates)
1280 {
1281         struct ieee80211_supported_band *sband;
1282         struct ieee80211_rate *bitrates;
1283         size_t num_rates;
1284         u32 supp_rates;
1285         int i, j;
1286         sband = local->hw.wiphy->bands[band];
1287
1288         if (WARN_ON(!sband))
1289                 return 1;
1290
1291         bitrates = sband->bitrates;
1292         num_rates = sband->n_bitrates;
1293         supp_rates = 0;
1294         for (i = 0; i < elems->supp_rates_len +
1295                      elems->ext_supp_rates_len; i++) {
1296                 u8 rate = 0;
1297                 int own_rate;
1298                 bool is_basic;
1299                 if (i < elems->supp_rates_len)
1300                         rate = elems->supp_rates[i];
1301                 else if (elems->ext_supp_rates)
1302                         rate = elems->ext_supp_rates
1303                                 [i - elems->supp_rates_len];
1304                 own_rate = 5 * (rate & 0x7f);
1305                 is_basic = !!(rate & 0x80);
1306
1307                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1308                         continue;
1309
1310                 for (j = 0; j < num_rates; j++) {
1311                         if (bitrates[j].bitrate == own_rate) {
1312                                 supp_rates |= BIT(j);
1313                                 if (basic_rates && is_basic)
1314                                         *basic_rates |= BIT(j);
1315                         }
1316                 }
1317         }
1318         return supp_rates;
1319 }
1320
1321 void ieee80211_stop_device(struct ieee80211_local *local)
1322 {
1323         ieee80211_led_radio(local, false);
1324         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1325
1326         cancel_work_sync(&local->reconfig_filter);
1327
1328         flush_workqueue(local->workqueue);
1329         drv_stop(local);
1330 }
1331
1332 int ieee80211_reconfig(struct ieee80211_local *local)
1333 {
1334         struct ieee80211_hw *hw = &local->hw;
1335         struct ieee80211_sub_if_data *sdata;
1336         struct ieee80211_chanctx *ctx;
1337         struct sta_info *sta;
1338         int res, i;
1339
1340 #ifdef CONFIG_PM
1341         if (local->suspended)
1342                 local->resuming = true;
1343
1344         if (local->wowlan) {
1345                 local->wowlan = false;
1346                 res = drv_resume(local);
1347                 if (res < 0) {
1348                         local->resuming = false;
1349                         return res;
1350                 }
1351                 if (res == 0)
1352                         goto wake_up;
1353                 WARN_ON(res > 1);
1354                 /*
1355                  * res is 1, which means the driver requested
1356                  * to go through a regular reset on wakeup.
1357                  */
1358         }
1359 #endif
1360         /* everything else happens only if HW was up & running */
1361         if (!local->open_count)
1362                 goto wake_up;
1363
1364         /*
1365          * Upon resume hardware can sometimes be goofy due to
1366          * various platform / driver / bus issues, so restarting
1367          * the device may at times not work immediately. Propagate
1368          * the error.
1369          */
1370         res = drv_start(local);
1371         if (res) {
1372                 WARN(local->suspended, "Hardware became unavailable "
1373                      "upon resume. This could be a software issue "
1374                      "prior to suspend or a hardware issue.\n");
1375                 return res;
1376         }
1377
1378         /* setup fragmentation threshold */
1379         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1380
1381         /* setup RTS threshold */
1382         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1383
1384         /* reset coverage class */
1385         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1386
1387         ieee80211_led_radio(local, true);
1388         ieee80211_mod_tpt_led_trig(local,
1389                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1390
1391         /* add interfaces */
1392         sdata = rtnl_dereference(local->monitor_sdata);
1393         if (sdata) {
1394                 res = drv_add_interface(local, sdata);
1395                 if (WARN_ON(res)) {
1396                         rcu_assign_pointer(local->monitor_sdata, NULL);
1397                         synchronize_net();
1398                         kfree(sdata);
1399                 }
1400         }
1401
1402         list_for_each_entry(sdata, &local->interfaces, list) {
1403                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1404                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1405                     ieee80211_sdata_running(sdata))
1406                         res = drv_add_interface(local, sdata);
1407         }
1408
1409         /* add channel contexts */
1410         mutex_lock(&local->chanctx_mtx);
1411         list_for_each_entry(ctx, &local->chanctx_list, list)
1412                 WARN_ON(drv_add_chanctx(local, ctx));
1413         mutex_unlock(&local->chanctx_mtx);
1414
1415         /* add STAs back */
1416         mutex_lock(&local->sta_mtx);
1417         list_for_each_entry(sta, &local->sta_list, list) {
1418                 enum ieee80211_sta_state state;
1419
1420                 if (!sta->uploaded)
1421                         continue;
1422
1423                 /* AP-mode stations will be added later */
1424                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1425                         continue;
1426
1427                 for (state = IEEE80211_STA_NOTEXIST;
1428                      state < sta->sta_state; state++)
1429                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1430                                               state + 1));
1431         }
1432         mutex_unlock(&local->sta_mtx);
1433
1434         /* reconfigure tx conf */
1435         if (hw->queues >= IEEE80211_NUM_ACS) {
1436                 list_for_each_entry(sdata, &local->interfaces, list) {
1437                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1438                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1439                             !ieee80211_sdata_running(sdata))
1440                                 continue;
1441
1442                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1443                                 drv_conf_tx(local, sdata, i,
1444                                             &sdata->tx_conf[i]);
1445                 }
1446         }
1447
1448         /* reconfigure hardware */
1449         ieee80211_hw_config(local, ~0);
1450
1451         ieee80211_configure_filter(local);
1452
1453         /* Finally also reconfigure all the BSS information */
1454         list_for_each_entry(sdata, &local->interfaces, list) {
1455                 struct ieee80211_chanctx_conf *ctx_conf;
1456                 u32 changed;
1457
1458                 if (!ieee80211_sdata_running(sdata))
1459                         continue;
1460
1461                 mutex_lock(&local->chanctx_mtx);
1462                 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1463                                 lockdep_is_held(&local->chanctx_mtx));
1464                 if (ctx_conf) {
1465                         ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1466                                            conf);
1467                         drv_assign_vif_chanctx(local, sdata, ctx);
1468                 }
1469                 mutex_unlock(&local->chanctx_mtx);
1470
1471                 /* common change flags for all interface types */
1472                 changed = BSS_CHANGED_ERP_CTS_PROT |
1473                           BSS_CHANGED_ERP_PREAMBLE |
1474                           BSS_CHANGED_ERP_SLOT |
1475                           BSS_CHANGED_HT |
1476                           BSS_CHANGED_BASIC_RATES |
1477                           BSS_CHANGED_BEACON_INT |
1478                           BSS_CHANGED_BSSID |
1479                           BSS_CHANGED_CQM |
1480                           BSS_CHANGED_QOS |
1481                           BSS_CHANGED_IDLE |
1482                           BSS_CHANGED_TXPOWER;
1483
1484                 switch (sdata->vif.type) {
1485                 case NL80211_IFTYPE_STATION:
1486                         changed |= BSS_CHANGED_ASSOC |
1487                                    BSS_CHANGED_ARP_FILTER |
1488                                    BSS_CHANGED_PS;
1489                         mutex_lock(&sdata->u.mgd.mtx);
1490                         ieee80211_bss_info_change_notify(sdata, changed);
1491                         mutex_unlock(&sdata->u.mgd.mtx);
1492                         break;
1493                 case NL80211_IFTYPE_ADHOC:
1494                         changed |= BSS_CHANGED_IBSS;
1495                         /* fall through */
1496                 case NL80211_IFTYPE_AP:
1497                         changed |= BSS_CHANGED_SSID;
1498
1499                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1500                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1501
1502                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1503                                         drv_start_ap(local, sdata);
1504                         }
1505
1506                         /* fall through */
1507                 case NL80211_IFTYPE_MESH_POINT:
1508                         changed |= BSS_CHANGED_BEACON |
1509                                    BSS_CHANGED_BEACON_ENABLED;
1510                         ieee80211_bss_info_change_notify(sdata, changed);
1511                         break;
1512                 case NL80211_IFTYPE_WDS:
1513                         break;
1514                 case NL80211_IFTYPE_AP_VLAN:
1515                 case NL80211_IFTYPE_MONITOR:
1516                         /* ignore virtual */
1517                         break;
1518                 case NL80211_IFTYPE_P2P_DEVICE:
1519                         changed = BSS_CHANGED_IDLE;
1520                         break;
1521                 case NL80211_IFTYPE_UNSPECIFIED:
1522                 case NUM_NL80211_IFTYPES:
1523                 case NL80211_IFTYPE_P2P_CLIENT:
1524                 case NL80211_IFTYPE_P2P_GO:
1525                         WARN_ON(1);
1526                         break;
1527                 }
1528         }
1529
1530         ieee80211_recalc_ps(local, -1);
1531
1532         /*
1533          * The sta might be in psm against the ap (e.g. because
1534          * this was the state before a hw restart), so we
1535          * explicitly send a null packet in order to make sure
1536          * it'll sync against the ap (and get out of psm).
1537          */
1538         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1539                 list_for_each_entry(sdata, &local->interfaces, list) {
1540                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1541                                 continue;
1542
1543                         ieee80211_send_nullfunc(local, sdata, 0);
1544                 }
1545         }
1546
1547         /* APs are now beaconing, add back stations */
1548         mutex_lock(&local->sta_mtx);
1549         list_for_each_entry(sta, &local->sta_list, list) {
1550                 enum ieee80211_sta_state state;
1551
1552                 if (!sta->uploaded)
1553                         continue;
1554
1555                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1556                         continue;
1557
1558                 for (state = IEEE80211_STA_NOTEXIST;
1559                      state < sta->sta_state; state++)
1560                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1561                                               state + 1));
1562         }
1563         mutex_unlock(&local->sta_mtx);
1564
1565         /* add back keys */
1566         list_for_each_entry(sdata, &local->interfaces, list)
1567                 if (ieee80211_sdata_running(sdata))
1568                         ieee80211_enable_keys(sdata);
1569
1570  wake_up:
1571         local->in_reconfig = false;
1572         barrier();
1573
1574         /*
1575          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1576          * sessions can be established after a resume.
1577          *
1578          * Also tear down aggregation sessions since reconfiguring
1579          * them in a hardware restart scenario is not easily done
1580          * right now, and the hardware will have lost information
1581          * about the sessions, but we and the AP still think they
1582          * are active. This is really a workaround though.
1583          */
1584         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1585                 mutex_lock(&local->sta_mtx);
1586
1587                 list_for_each_entry(sta, &local->sta_list, list) {
1588                         ieee80211_sta_tear_down_BA_sessions(sta, true);
1589                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1590                 }
1591
1592                 mutex_unlock(&local->sta_mtx);
1593         }
1594
1595         ieee80211_wake_queues_by_reason(hw,
1596                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1597
1598         /*
1599          * If this is for hw restart things are still running.
1600          * We may want to change that later, however.
1601          */
1602         if (!local->suspended) {
1603                 drv_restart_complete(local);
1604                 return 0;
1605         }
1606
1607 #ifdef CONFIG_PM
1608         /* first set suspended false, then resuming */
1609         local->suspended = false;
1610         mb();
1611         local->resuming = false;
1612
1613         list_for_each_entry(sdata, &local->interfaces, list) {
1614                 switch(sdata->vif.type) {
1615                 case NL80211_IFTYPE_STATION:
1616                         ieee80211_sta_restart(sdata);
1617                         break;
1618                 case NL80211_IFTYPE_ADHOC:
1619                         ieee80211_ibss_restart(sdata);
1620                         break;
1621                 case NL80211_IFTYPE_MESH_POINT:
1622                         ieee80211_mesh_restart(sdata);
1623                         break;
1624                 default:
1625                         break;
1626                 }
1627         }
1628
1629         mod_timer(&local->sta_cleanup, jiffies + 1);
1630
1631         mutex_lock(&local->sta_mtx);
1632         list_for_each_entry(sta, &local->sta_list, list)
1633                 mesh_plink_restart(sta);
1634         mutex_unlock(&local->sta_mtx);
1635 #else
1636         WARN_ON(1);
1637 #endif
1638         return 0;
1639 }
1640
1641 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1642 {
1643         struct ieee80211_sub_if_data *sdata;
1644         struct ieee80211_local *local;
1645         struct ieee80211_key *key;
1646
1647         if (WARN_ON(!vif))
1648                 return;
1649
1650         sdata = vif_to_sdata(vif);
1651         local = sdata->local;
1652
1653         if (WARN_ON(!local->resuming))
1654                 return;
1655
1656         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1657                 return;
1658
1659         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1660
1661         mutex_lock(&local->key_mtx);
1662         list_for_each_entry(key, &sdata->key_list, list)
1663                 key->flags |= KEY_FLAG_TAINTED;
1664         mutex_unlock(&local->key_mtx);
1665 }
1666 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1667
1668 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1669 {
1670         struct ieee80211_local *local = sdata->local;
1671         struct ieee80211_chanctx_conf *chanctx_conf;
1672         struct ieee80211_chanctx *chanctx;
1673
1674         mutex_lock(&local->chanctx_mtx);
1675
1676         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1677                                         lockdep_is_held(&local->chanctx_mtx));
1678
1679         if (WARN_ON_ONCE(!chanctx_conf))
1680                 goto unlock;
1681
1682         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1683         ieee80211_recalc_smps_chanctx(local, chanctx);
1684  unlock:
1685         mutex_unlock(&local->chanctx_mtx);
1686 }
1687
1688 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1689 {
1690         int i;
1691
1692         for (i = 0; i < n_ids; i++)
1693                 if (ids[i] == id)
1694                         return true;
1695         return false;
1696 }
1697
1698 /**
1699  * ieee80211_ie_split - split an IE buffer according to ordering
1700  *
1701  * @ies: the IE buffer
1702  * @ielen: the length of the IE buffer
1703  * @ids: an array with element IDs that are allowed before
1704  *      the split
1705  * @n_ids: the size of the element ID array
1706  * @offset: offset where to start splitting in the buffer
1707  *
1708  * This function splits an IE buffer by updating the @offset
1709  * variable to point to the location where the buffer should be
1710  * split.
1711  *
1712  * It assumes that the given IE buffer is well-formed, this
1713  * has to be guaranteed by the caller!
1714  *
1715  * It also assumes that the IEs in the buffer are ordered
1716  * correctly, if not the result of using this function will not
1717  * be ordered correctly either, i.e. it does no reordering.
1718  *
1719  * The function returns the offset where the next part of the
1720  * buffer starts, which may be @ielen if the entire (remainder)
1721  * of the buffer should be used.
1722  */
1723 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1724                           const u8 *ids, int n_ids, size_t offset)
1725 {
1726         size_t pos = offset;
1727
1728         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1729                 pos += 2 + ies[pos + 1];
1730
1731         return pos;
1732 }
1733
1734 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1735 {
1736         size_t pos = offset;
1737
1738         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1739                 pos += 2 + ies[pos + 1];
1740
1741         return pos;
1742 }
1743
1744 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1745                                             int rssi_min_thold,
1746                                             int rssi_max_thold)
1747 {
1748         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1749
1750         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1751                 return;
1752
1753         /*
1754          * Scale up threshold values before storing it, as the RSSI averaging
1755          * algorithm uses a scaled up value as well. Change this scaling
1756          * factor if the RSSI averaging algorithm changes.
1757          */
1758         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1759         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1760 }
1761
1762 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1763                                     int rssi_min_thold,
1764                                     int rssi_max_thold)
1765 {
1766         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1767
1768         WARN_ON(rssi_min_thold == rssi_max_thold ||
1769                 rssi_min_thold > rssi_max_thold);
1770
1771         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1772                                        rssi_max_thold);
1773 }
1774 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1775
1776 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1777 {
1778         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1779
1780         _ieee80211_enable_rssi_reports(sdata, 0, 0);
1781 }
1782 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1783
1784 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1785                               u16 cap)
1786 {
1787         __le16 tmp;
1788
1789         *pos++ = WLAN_EID_HT_CAPABILITY;
1790         *pos++ = sizeof(struct ieee80211_ht_cap);
1791         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1792
1793         /* capability flags */
1794         tmp = cpu_to_le16(cap);
1795         memcpy(pos, &tmp, sizeof(u16));
1796         pos += sizeof(u16);
1797
1798         /* AMPDU parameters */
1799         *pos++ = ht_cap->ampdu_factor |
1800                  (ht_cap->ampdu_density <<
1801                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1802
1803         /* MCS set */
1804         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1805         pos += sizeof(ht_cap->mcs);
1806
1807         /* extended capabilities */
1808         pos += sizeof(__le16);
1809
1810         /* BF capabilities */
1811         pos += sizeof(__le32);
1812
1813         /* antenna selection */
1814         pos += sizeof(u8);
1815
1816         return pos;
1817 }
1818
1819 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1820                                                            u32 cap)
1821 {
1822         __le32 tmp;
1823
1824         *pos++ = WLAN_EID_VHT_CAPABILITY;
1825         *pos++ = sizeof(struct ieee80211_vht_cap);
1826         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1827
1828         /* capability flags */
1829         tmp = cpu_to_le32(cap);
1830         memcpy(pos, &tmp, sizeof(u32));
1831         pos += sizeof(u32);
1832
1833         /* VHT MCS set */
1834         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1835         pos += sizeof(vht_cap->vht_mcs);
1836
1837         return pos;
1838 }
1839
1840 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1841                                struct ieee80211_channel *channel,
1842                                enum nl80211_channel_type channel_type,
1843                                u16 prot_mode)
1844 {
1845         struct ieee80211_ht_operation *ht_oper;
1846         /* Build HT Information */
1847         *pos++ = WLAN_EID_HT_OPERATION;
1848         *pos++ = sizeof(struct ieee80211_ht_operation);
1849         ht_oper = (struct ieee80211_ht_operation *)pos;
1850         ht_oper->primary_chan =
1851                         ieee80211_frequency_to_channel(channel->center_freq);
1852         switch (channel_type) {
1853         case NL80211_CHAN_HT40MINUS:
1854                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1855                 break;
1856         case NL80211_CHAN_HT40PLUS:
1857                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1858                 break;
1859         case NL80211_CHAN_HT20:
1860         default:
1861                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1862                 break;
1863         }
1864         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1865             channel_type != NL80211_CHAN_NO_HT &&
1866             channel_type != NL80211_CHAN_HT20)
1867                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1868
1869         ht_oper->operation_mode = cpu_to_le16(prot_mode);
1870         ht_oper->stbc_param = 0x0000;
1871
1872         /* It seems that Basic MCS set and Supported MCS set
1873            are identical for the first 10 bytes */
1874         memset(&ht_oper->basic_set, 0, 16);
1875         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1876
1877         return pos + sizeof(struct ieee80211_ht_operation);
1878 }
1879
1880 enum nl80211_channel_type
1881 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
1882 {
1883         enum nl80211_channel_type channel_type;
1884
1885         if (!ht_oper)
1886                 return NL80211_CHAN_NO_HT;
1887
1888         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1889         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1890                 channel_type = NL80211_CHAN_HT20;
1891                 break;
1892         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1893                 channel_type = NL80211_CHAN_HT40PLUS;
1894                 break;
1895         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1896                 channel_type = NL80211_CHAN_HT40MINUS;
1897                 break;
1898         default:
1899                 channel_type = NL80211_CHAN_NO_HT;
1900         }
1901
1902         return channel_type;
1903 }
1904
1905 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1906                             struct sk_buff *skb, bool need_basic,
1907                             enum ieee80211_band band)
1908 {
1909         struct ieee80211_local *local = sdata->local;
1910         struct ieee80211_supported_band *sband;
1911         int rate;
1912         u8 i, rates, *pos;
1913         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1914
1915         sband = local->hw.wiphy->bands[band];
1916         rates = sband->n_bitrates;
1917         if (rates > 8)
1918                 rates = 8;
1919
1920         if (skb_tailroom(skb) < rates + 2)
1921                 return -ENOMEM;
1922
1923         pos = skb_put(skb, rates + 2);
1924         *pos++ = WLAN_EID_SUPP_RATES;
1925         *pos++ = rates;
1926         for (i = 0; i < rates; i++) {
1927                 u8 basic = 0;
1928                 if (need_basic && basic_rates & BIT(i))
1929                         basic = 0x80;
1930                 rate = sband->bitrates[i].bitrate;
1931                 *pos++ = basic | (u8) (rate / 5);
1932         }
1933
1934         return 0;
1935 }
1936
1937 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1938                                 struct sk_buff *skb, bool need_basic,
1939                                 enum ieee80211_band band)
1940 {
1941         struct ieee80211_local *local = sdata->local;
1942         struct ieee80211_supported_band *sband;
1943         int rate;
1944         u8 i, exrates, *pos;
1945         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1946
1947         sband = local->hw.wiphy->bands[band];
1948         exrates = sband->n_bitrates;
1949         if (exrates > 8)
1950                 exrates -= 8;
1951         else
1952                 exrates = 0;
1953
1954         if (skb_tailroom(skb) < exrates + 2)
1955                 return -ENOMEM;
1956
1957         if (exrates) {
1958                 pos = skb_put(skb, exrates + 2);
1959                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1960                 *pos++ = exrates;
1961                 for (i = 8; i < sband->n_bitrates; i++) {
1962                         u8 basic = 0;
1963                         if (need_basic && basic_rates & BIT(i))
1964                                 basic = 0x80;
1965                         rate = sband->bitrates[i].bitrate;
1966                         *pos++ = basic | (u8) (rate / 5);
1967                 }
1968         }
1969         return 0;
1970 }
1971
1972 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
1973 {
1974         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1975         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1976
1977         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
1978                 /* non-managed type inferfaces */
1979                 return 0;
1980         }
1981         return ifmgd->ave_beacon_signal;
1982 }
1983 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
1984
1985 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
1986 {
1987         if (!mcs)
1988                 return 1;
1989
1990         /* TODO: consider rx_highest */
1991
1992         if (mcs->rx_mask[3])
1993                 return 4;
1994         if (mcs->rx_mask[2])
1995                 return 3;
1996         if (mcs->rx_mask[1])
1997                 return 2;
1998         return 1;
1999 }