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c2d1560a JB |
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/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/if_arp.h> | |
c2d1560a | 21 | #include <linux/bitmap.h> |
881d966b | 22 | #include <net/net_namespace.h> |
c2d1560a | 23 | #include <net/cfg80211.h> |
dabeb344 | 24 | #include <net/rtnetlink.h> |
c2d1560a JB |
25 | |
26 | #include "ieee80211_i.h" | |
24487981 | 27 | #include "driver-ops.h" |
2c8dccc7 | 28 | #include "rate.h" |
ee385855 | 29 | #include "mesh.h" |
c2d1560a | 30 | #include "wme.h" |
f2753ddb | 31 | #include "led.h" |
fffd0934 | 32 | #include "wep.h" |
c2d1560a JB |
33 | |
34 | /* privid for wiphys to determine whether they belong to us or not */ | |
35 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
36 | ||
9a95371a LR |
37 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
38 | { | |
39 | struct ieee80211_local *local; | |
40 | BUG_ON(!wiphy); | |
41 | ||
42 | local = wiphy_priv(wiphy); | |
43 | return &local->hw; | |
44 | } | |
45 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 46 | |
71364716 | 47 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 48 | enum nl80211_iftype type) |
c2d1560a | 49 | { |
a494bb1c | 50 | __le16 fc = hdr->frame_control; |
c2d1560a | 51 | |
98f0b0a3 RR |
52 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
53 | if (len < 16) | |
c2d1560a JB |
54 | return NULL; |
55 | ||
a494bb1c | 56 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
57 | if (len < 24) /* drop incorrect hdr len (data) */ |
58 | return NULL; | |
a494bb1c HH |
59 | |
60 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 61 | return NULL; |
a494bb1c HH |
62 | if (ieee80211_has_tods(fc)) |
63 | return hdr->addr1; | |
64 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 65 | return hdr->addr2; |
a494bb1c HH |
66 | |
67 | return hdr->addr3; | |
68 | } | |
69 | ||
70 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
71 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
72 | return NULL; | |
c2d1560a | 73 | return hdr->addr3; |
a494bb1c HH |
74 | } |
75 | ||
76 | if (ieee80211_is_ctl(fc)) { | |
77 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 78 | return hdr->addr1; |
a494bb1c HH |
79 | |
80 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 81 | switch (type) { |
05c914fe | 82 | case NL80211_IFTYPE_STATION: |
71364716 | 83 | return hdr->addr2; |
05c914fe JB |
84 | case NL80211_IFTYPE_AP: |
85 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
86 | return hdr->addr1; |
87 | default: | |
a494bb1c | 88 | break; /* fall through to the return */ |
71364716 RR |
89 | } |
90 | } | |
c2d1560a JB |
91 | } |
92 | ||
93 | return NULL; | |
94 | } | |
95 | ||
5cf121c3 | 96 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 97 | { |
2de8e0d9 JB |
98 | struct sk_buff *skb = tx->skb; |
99 | struct ieee80211_hdr *hdr; | |
100 | ||
101 | do { | |
102 | hdr = (struct ieee80211_hdr *) skb->data; | |
103 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
104 | } while ((skb = skb->next)); | |
c2d1560a JB |
105 | } |
106 | ||
107 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
108 | int rate, int erp, int short_preamble) | |
109 | { | |
110 | int dur; | |
111 | ||
112 | /* calculate duration (in microseconds, rounded up to next higher | |
113 | * integer if it includes a fractional microsecond) to send frame of | |
114 | * len bytes (does not include FCS) at the given rate. Duration will | |
115 | * also include SIFS. | |
116 | * | |
117 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
118 | * DIV_ROUND_UP() operations. | |
119 | */ | |
120 | ||
8318d78a | 121 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
122 | /* |
123 | * OFDM: | |
124 | * | |
125 | * N_DBPS = DATARATE x 4 | |
126 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
127 | * (16 = SIGNAL time, 6 = tail bits) | |
128 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
129 | * | |
130 | * T_SYM = 4 usec | |
131 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
132 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
133 | * signal ext = 6 usec | |
134 | */ | |
c2d1560a JB |
135 | dur = 16; /* SIFS + signal ext */ |
136 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
137 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
138 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
139 | 4 * rate); /* T_SYM x N_SYM */ | |
140 | } else { | |
141 | /* | |
142 | * 802.11b or 802.11g with 802.11b compatibility: | |
143 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
144 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
145 | * | |
146 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
147 | * aSIFSTime = 10 usec | |
148 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
149 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
150 | */ | |
151 | dur = 10; /* aSIFSTime = 10 usec */ | |
152 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
153 | ||
154 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
155 | } | |
156 | ||
157 | return dur; | |
158 | } | |
159 | ||
160 | /* Exported duration function for driver use */ | |
32bfd35d JB |
161 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
162 | struct ieee80211_vif *vif, | |
8318d78a JB |
163 | size_t frame_len, |
164 | struct ieee80211_rate *rate) | |
c2d1560a JB |
165 | { |
166 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 167 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
168 | u16 dur; |
169 | int erp; | |
25d834e1 | 170 | bool short_preamble = false; |
c2d1560a | 171 | |
8318d78a | 172 | erp = 0; |
25d834e1 JB |
173 | if (vif) { |
174 | sdata = vif_to_sdata(vif); | |
bda3933a | 175 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
176 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
177 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
178 | } | |
8318d78a JB |
179 | |
180 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 181 | short_preamble); |
c2d1560a JB |
182 | |
183 | return cpu_to_le16(dur); | |
184 | } | |
185 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
186 | ||
32bfd35d JB |
187 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
188 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 189 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
190 | { |
191 | struct ieee80211_local *local = hw_to_local(hw); | |
192 | struct ieee80211_rate *rate; | |
25d834e1 | 193 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 194 | bool short_preamble; |
c2d1560a JB |
195 | int erp; |
196 | u16 dur; | |
2e92e6f2 JB |
197 | struct ieee80211_supported_band *sband; |
198 | ||
199 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 200 | |
25d834e1 | 201 | short_preamble = false; |
7e9ed188 | 202 | |
e039fa4a | 203 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
204 | |
205 | erp = 0; | |
25d834e1 JB |
206 | if (vif) { |
207 | sdata = vif_to_sdata(vif); | |
bda3933a | 208 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
209 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
210 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
211 | } | |
c2d1560a JB |
212 | |
213 | /* CTS duration */ | |
8318d78a | 214 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
215 | erp, short_preamble); |
216 | /* Data frame duration */ | |
8318d78a | 217 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
218 | erp, short_preamble); |
219 | /* ACK duration */ | |
8318d78a | 220 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
221 | erp, short_preamble); |
222 | ||
223 | return cpu_to_le16(dur); | |
224 | } | |
225 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
226 | ||
32bfd35d JB |
227 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
228 | struct ieee80211_vif *vif, | |
c2d1560a | 229 | size_t frame_len, |
e039fa4a | 230 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
231 | { |
232 | struct ieee80211_local *local = hw_to_local(hw); | |
233 | struct ieee80211_rate *rate; | |
25d834e1 | 234 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 235 | bool short_preamble; |
c2d1560a JB |
236 | int erp; |
237 | u16 dur; | |
2e92e6f2 JB |
238 | struct ieee80211_supported_band *sband; |
239 | ||
240 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 241 | |
25d834e1 | 242 | short_preamble = false; |
7e9ed188 | 243 | |
e039fa4a | 244 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 245 | erp = 0; |
25d834e1 JB |
246 | if (vif) { |
247 | sdata = vif_to_sdata(vif); | |
bda3933a | 248 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
249 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
250 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
251 | } | |
c2d1560a JB |
252 | |
253 | /* Data frame duration */ | |
8318d78a | 254 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 255 | erp, short_preamble); |
e039fa4a | 256 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 257 | /* ACK duration */ |
8318d78a | 258 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
259 | erp, short_preamble); |
260 | } | |
261 | ||
262 | return cpu_to_le16(dur); | |
263 | } | |
264 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
265 | ||
ce7c9111 KV |
266 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
267 | enum queue_stop_reason reason) | |
c2d1560a JB |
268 | { |
269 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 270 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 271 | |
b5878a2d JB |
272 | trace_wake_queue(local, queue, reason); |
273 | ||
e4e72fb4 JB |
274 | if (WARN_ON(queue >= hw->queues)) |
275 | return; | |
ce7c9111 | 276 | |
96f5e66e JB |
277 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
278 | ||
279 | if (local->queue_stop_reasons[queue] != 0) | |
280 | /* someone still has this queue stopped */ | |
281 | return; | |
282 | ||
7236fe29 JB |
283 | if (skb_queue_empty(&local->pending[queue])) { |
284 | rcu_read_lock(); | |
5b714c6a JB |
285 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
286 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
287 | continue; | |
2337db8d | 288 | netif_wake_subqueue(sdata->dev, queue); |
5b714c6a | 289 | } |
7236fe29 JB |
290 | rcu_read_unlock(); |
291 | } else | |
3b8d81e0 | 292 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 293 | } |
ce7c9111 | 294 | |
96f5e66e JB |
295 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
296 | enum queue_stop_reason reason) | |
ce7c9111 KV |
297 | { |
298 | struct ieee80211_local *local = hw_to_local(hw); | |
299 | unsigned long flags; | |
300 | ||
301 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
302 | __ieee80211_wake_queue(hw, queue, reason); | |
303 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
304 | } | |
305 | ||
306 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
307 | { | |
308 | ieee80211_wake_queue_by_reason(hw, queue, | |
309 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
310 | } | |
c2d1560a JB |
311 | EXPORT_SYMBOL(ieee80211_wake_queue); |
312 | ||
ce7c9111 KV |
313 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
314 | enum queue_stop_reason reason) | |
c2d1560a JB |
315 | { |
316 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 317 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 318 | |
b5878a2d JB |
319 | trace_stop_queue(local, queue, reason); |
320 | ||
e4e72fb4 JB |
321 | if (WARN_ON(queue >= hw->queues)) |
322 | return; | |
96f5e66e | 323 | |
2a577d98 | 324 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 JB |
325 | |
326 | rcu_read_lock(); | |
327 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 328 | netif_stop_subqueue(sdata->dev, queue); |
cf0277e7 | 329 | rcu_read_unlock(); |
c2d1560a | 330 | } |
ce7c9111 | 331 | |
96f5e66e JB |
332 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
333 | enum queue_stop_reason reason) | |
ce7c9111 KV |
334 | { |
335 | struct ieee80211_local *local = hw_to_local(hw); | |
336 | unsigned long flags; | |
337 | ||
338 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
339 | __ieee80211_stop_queue(hw, queue, reason); | |
340 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
341 | } | |
342 | ||
343 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
344 | { | |
345 | ieee80211_stop_queue_by_reason(hw, queue, | |
346 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
347 | } | |
c2d1560a JB |
348 | EXPORT_SYMBOL(ieee80211_stop_queue); |
349 | ||
8f77f384 JB |
350 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
351 | struct sk_buff *skb) | |
352 | { | |
353 | struct ieee80211_hw *hw = &local->hw; | |
354 | unsigned long flags; | |
355 | int queue = skb_get_queue_mapping(skb); | |
a7bc376c JB |
356 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
357 | ||
358 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 359 | kfree_skb(skb); |
a7bc376c JB |
360 | return; |
361 | } | |
8f77f384 JB |
362 | |
363 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
364 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 365 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
366 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
367 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
368 | } | |
369 | ||
50a9432d JB |
370 | int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
371 | struct sk_buff_head *skbs, | |
372 | void (*fn)(void *data), void *data) | |
8f77f384 JB |
373 | { |
374 | struct ieee80211_hw *hw = &local->hw; | |
375 | struct sk_buff *skb; | |
376 | unsigned long flags; | |
377 | int queue, ret = 0, i; | |
378 | ||
379 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
380 | for (i = 0; i < hw->queues; i++) | |
381 | __ieee80211_stop_queue(hw, i, | |
382 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
383 | ||
384 | while ((skb = skb_dequeue(skbs))) { | |
a7bc376c JB |
385 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
386 | ||
387 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 388 | kfree_skb(skb); |
a7bc376c JB |
389 | continue; |
390 | } | |
391 | ||
8f77f384 JB |
392 | ret++; |
393 | queue = skb_get_queue_mapping(skb); | |
3b8d81e0 | 394 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
395 | } |
396 | ||
50a9432d JB |
397 | if (fn) |
398 | fn(data); | |
399 | ||
3b8d81e0 | 400 | for (i = 0; i < hw->queues; i++) |
8f77f384 JB |
401 | __ieee80211_wake_queue(hw, i, |
402 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
8f77f384 JB |
403 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
50a9432d JB |
408 | int ieee80211_add_pending_skbs(struct ieee80211_local *local, |
409 | struct sk_buff_head *skbs) | |
410 | { | |
411 | return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL); | |
412 | } | |
413 | ||
ce7c9111 KV |
414 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
415 | enum queue_stop_reason reason) | |
c2d1560a | 416 | { |
ce7c9111 KV |
417 | struct ieee80211_local *local = hw_to_local(hw); |
418 | unsigned long flags; | |
c2d1560a JB |
419 | int i; |
420 | ||
ce7c9111 KV |
421 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
422 | ||
96f5e66e | 423 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
424 | __ieee80211_stop_queue(hw, i, reason); |
425 | ||
426 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
427 | } | |
428 | ||
429 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
430 | { | |
431 | ieee80211_stop_queues_by_reason(hw, | |
432 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
433 | } |
434 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
435 | ||
92ab8535 TW |
436 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
437 | { | |
438 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
439 | unsigned long flags; |
440 | int ret; | |
96f5e66e | 441 | |
e4e72fb4 JB |
442 | if (WARN_ON(queue >= hw->queues)) |
443 | return true; | |
96f5e66e | 444 | |
3b8d81e0 JB |
445 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
446 | ret = !!local->queue_stop_reasons[queue]; | |
447 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
448 | return ret; | |
92ab8535 TW |
449 | } |
450 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
451 | ||
ce7c9111 KV |
452 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
453 | enum queue_stop_reason reason) | |
c2d1560a | 454 | { |
ce7c9111 KV |
455 | struct ieee80211_local *local = hw_to_local(hw); |
456 | unsigned long flags; | |
c2d1560a JB |
457 | int i; |
458 | ||
ce7c9111 KV |
459 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
460 | ||
e4e72fb4 | 461 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
462 | __ieee80211_wake_queue(hw, i, reason); |
463 | ||
464 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
465 | } | |
466 | ||
467 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
468 | { | |
469 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
470 | } |
471 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 472 | |
32bfd35d JB |
473 | void ieee80211_iterate_active_interfaces( |
474 | struct ieee80211_hw *hw, | |
475 | void (*iterator)(void *data, u8 *mac, | |
476 | struct ieee80211_vif *vif), | |
477 | void *data) | |
dabeb344 JB |
478 | { |
479 | struct ieee80211_local *local = hw_to_local(hw); | |
480 | struct ieee80211_sub_if_data *sdata; | |
481 | ||
c771c9d8 | 482 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
483 | |
484 | list_for_each_entry(sdata, &local->interfaces, list) { | |
485 | switch (sdata->vif.type) { | |
05c914fe JB |
486 | case NL80211_IFTYPE_MONITOR: |
487 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 488 | continue; |
2ca27bcf | 489 | default: |
2f561feb ID |
490 | break; |
491 | } | |
9607e6b6 | 492 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 493 | iterator(data, sdata->vif.addr, |
2f561feb ID |
494 | &sdata->vif); |
495 | } | |
496 | ||
c771c9d8 | 497 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
498 | } |
499 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
500 | ||
501 | void ieee80211_iterate_active_interfaces_atomic( | |
502 | struct ieee80211_hw *hw, | |
503 | void (*iterator)(void *data, u8 *mac, | |
504 | struct ieee80211_vif *vif), | |
505 | void *data) | |
506 | { | |
507 | struct ieee80211_local *local = hw_to_local(hw); | |
508 | struct ieee80211_sub_if_data *sdata; | |
509 | ||
e38bad47 | 510 | rcu_read_lock(); |
dabeb344 | 511 | |
e38bad47 | 512 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 513 | switch (sdata->vif.type) { |
05c914fe JB |
514 | case NL80211_IFTYPE_MONITOR: |
515 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 516 | continue; |
2ca27bcf | 517 | default: |
dabeb344 JB |
518 | break; |
519 | } | |
9607e6b6 | 520 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 521 | iterator(data, sdata->vif.addr, |
32bfd35d | 522 | &sdata->vif); |
dabeb344 | 523 | } |
e38bad47 JB |
524 | |
525 | rcu_read_unlock(); | |
dabeb344 | 526 | } |
2f561feb | 527 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 528 | |
42935eca LR |
529 | /* |
530 | * Nothing should have been stuffed into the workqueue during | |
531 | * the suspend->resume cycle. If this WARN is seen then there | |
532 | * is a bug with either the driver suspend or something in | |
533 | * mac80211 stuffing into the workqueue which we haven't yet | |
534 | * cleared during mac80211's suspend cycle. | |
535 | */ | |
536 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
537 | { | |
ceb99fe0 JB |
538 | if (WARN(local->suspended && !local->resuming, |
539 | "queueing ieee80211 work while going to suspend\n")) | |
540 | return false; | |
42935eca LR |
541 | |
542 | return true; | |
543 | } | |
544 | ||
545 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
546 | { | |
547 | struct ieee80211_local *local = hw_to_local(hw); | |
548 | ||
549 | if (!ieee80211_can_queue_work(local)) | |
550 | return; | |
551 | ||
552 | queue_work(local->workqueue, work); | |
553 | } | |
554 | EXPORT_SYMBOL(ieee80211_queue_work); | |
555 | ||
556 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
557 | struct delayed_work *dwork, | |
558 | unsigned long delay) | |
559 | { | |
560 | struct ieee80211_local *local = hw_to_local(hw); | |
561 | ||
562 | if (!ieee80211_can_queue_work(local)) | |
563 | return; | |
564 | ||
565 | queue_delayed_work(local->workqueue, dwork, delay); | |
566 | } | |
567 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
568 | ||
37ffc8da JB |
569 | void ieee802_11_parse_elems(u8 *start, size_t len, |
570 | struct ieee802_11_elems *elems) | |
d91f36db JB |
571 | { |
572 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
573 | } | |
574 | ||
5825fe10 JB |
575 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
576 | { | |
577 | struct ieee80211_local *local = sdata->local; | |
578 | struct ieee80211_tx_queue_params qparam; | |
aa837e1d JB |
579 | int queue; |
580 | bool use_11b; | |
581 | int aCWmin, aCWmax; | |
5825fe10 JB |
582 | |
583 | if (!local->ops->conf_tx) | |
584 | return; | |
585 | ||
586 | memset(&qparam, 0, sizeof(qparam)); | |
587 | ||
aa837e1d JB |
588 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
589 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 590 | |
aa837e1d JB |
591 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
592 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
593 | aCWmax = 1023; | |
594 | if (use_11b) | |
595 | aCWmin = 31; | |
596 | else | |
597 | aCWmin = 15; | |
598 | ||
599 | switch (queue) { | |
600 | case 3: /* AC_BK */ | |
7ba10a8e JB |
601 | qparam.cw_max = aCWmax; |
602 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
603 | qparam.txop = 0; |
604 | qparam.aifs = 7; | |
605 | break; | |
606 | default: /* never happens but let's not leave undefined */ | |
607 | case 2: /* AC_BE */ | |
7ba10a8e JB |
608 | qparam.cw_max = aCWmax; |
609 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
610 | qparam.txop = 0; |
611 | qparam.aifs = 3; | |
612 | break; | |
613 | case 1: /* AC_VI */ | |
614 | qparam.cw_max = aCWmin; | |
615 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
616 | if (use_11b) | |
617 | qparam.txop = 6016/32; | |
618 | else | |
619 | qparam.txop = 3008/32; | |
620 | qparam.aifs = 2; | |
621 | break; | |
622 | case 0: /* AC_VO */ | |
623 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
624 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
625 | if (use_11b) | |
626 | qparam.txop = 3264/32; | |
627 | else | |
628 | qparam.txop = 1504/32; | |
629 | qparam.aifs = 2; | |
630 | break; | |
631 | } | |
5825fe10 | 632 | |
ab13315a KV |
633 | qparam.uapsd = false; |
634 | ||
f6f3def3 EP |
635 | sdata->tx_conf[queue] = qparam; |
636 | drv_conf_tx(local, sdata, queue, &qparam); | |
aa837e1d | 637 | } |
e1b3ec1a SG |
638 | |
639 | /* after reinitialize QoS TX queues setting to default, | |
640 | * disable QoS at all */ | |
d9734979 S |
641 | |
642 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { | |
643 | sdata->vif.bss_conf.qos = | |
644 | sdata->vif.type != NL80211_IFTYPE_STATION; | |
645 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); | |
646 | } | |
5825fe10 | 647 | } |
e50db65c | 648 | |
46900298 JB |
649 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
650 | const size_t supp_rates_len, | |
651 | const u8 *supp_rates) | |
652 | { | |
653 | struct ieee80211_local *local = sdata->local; | |
654 | int i, have_higher_than_11mbit = 0; | |
655 | ||
656 | /* cf. IEEE 802.11 9.2.12 */ | |
657 | for (i = 0; i < supp_rates_len; i++) | |
658 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
659 | have_higher_than_11mbit = 1; | |
660 | ||
661 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
662 | have_higher_than_11mbit) | |
663 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
664 | else | |
665 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
666 | ||
667 | ieee80211_set_wmm_default(sdata); | |
668 | } | |
669 | ||
881d948c | 670 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
671 | enum ieee80211_band band) |
672 | { | |
673 | struct ieee80211_supported_band *sband; | |
674 | struct ieee80211_rate *bitrates; | |
881d948c | 675 | u32 mandatory_rates; |
96dd22ac JB |
676 | enum ieee80211_rate_flags mandatory_flag; |
677 | int i; | |
678 | ||
679 | sband = local->hw.wiphy->bands[band]; | |
680 | if (!sband) { | |
681 | WARN_ON(1); | |
682 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
683 | } | |
684 | ||
685 | if (band == IEEE80211_BAND_2GHZ) | |
686 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
687 | else | |
688 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
689 | ||
690 | bitrates = sband->bitrates; | |
691 | mandatory_rates = 0; | |
692 | for (i = 0; i < sband->n_bitrates; i++) | |
693 | if (bitrates[i].flags & mandatory_flag) | |
694 | mandatory_rates |= BIT(i); | |
695 | return mandatory_rates; | |
696 | } | |
46900298 JB |
697 | |
698 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
699 | u16 transaction, u16 auth_alg, | |
fffd0934 JB |
700 | u8 *extra, size_t extra_len, const u8 *bssid, |
701 | const u8 *key, u8 key_len, u8 key_idx) | |
46900298 JB |
702 | { |
703 | struct ieee80211_local *local = sdata->local; | |
704 | struct sk_buff *skb; | |
705 | struct ieee80211_mgmt *mgmt; | |
fffd0934 | 706 | int err; |
46900298 JB |
707 | |
708 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 709 | sizeof(*mgmt) + 6 + extra_len); |
d15b8459 | 710 | if (!skb) |
46900298 | 711 | return; |
d15b8459 | 712 | |
46900298 JB |
713 | skb_reserve(skb, local->hw.extra_tx_headroom); |
714 | ||
715 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
716 | memset(mgmt, 0, 24 + 6); | |
717 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
718 | IEEE80211_STYPE_AUTH); | |
46900298 | 719 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 720 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
721 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
722 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
723 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
724 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
725 | if (extra) | |
726 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 727 | |
fffd0934 JB |
728 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
729 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
730 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
731 | WARN_ON(err); | |
732 | } | |
733 | ||
62ae67be JB |
734 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
735 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
736 | } |
737 | ||
de95a54b | 738 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 739 | const u8 *ie, size_t ie_len, |
651b5225 JM |
740 | enum ieee80211_band band, u32 rate_mask, |
741 | u8 channel) | |
de95a54b JB |
742 | { |
743 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
744 | u8 *pos; |
745 | size_t offset = 0, noffset; | |
746 | int supp_rates_len, i; | |
8dcb2003 JM |
747 | u8 rates[32]; |
748 | int num_rates; | |
749 | int ext_rates_len; | |
de95a54b | 750 | |
4d36ec58 | 751 | sband = local->hw.wiphy->bands[band]; |
de95a54b JB |
752 | |
753 | pos = buffer; | |
754 | ||
8dcb2003 JM |
755 | num_rates = 0; |
756 | for (i = 0; i < sband->n_bitrates; i++) { | |
757 | if ((BIT(i) & rate_mask) == 0) | |
758 | continue; /* skip rate */ | |
759 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
760 | } | |
761 | ||
762 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 763 | |
de95a54b | 764 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 765 | *pos++ = supp_rates_len; |
8dcb2003 JM |
766 | memcpy(pos, rates, supp_rates_len); |
767 | pos += supp_rates_len; | |
8e664fb3 JB |
768 | |
769 | /* insert "request information" if in custom IEs */ | |
770 | if (ie && ie_len) { | |
771 | static const u8 before_extrates[] = { | |
772 | WLAN_EID_SSID, | |
773 | WLAN_EID_SUPP_RATES, | |
774 | WLAN_EID_REQUEST, | |
775 | }; | |
776 | noffset = ieee80211_ie_split(ie, ie_len, | |
777 | before_extrates, | |
778 | ARRAY_SIZE(before_extrates), | |
779 | offset); | |
780 | memcpy(pos, ie + offset, noffset - offset); | |
781 | pos += noffset - offset; | |
782 | offset = noffset; | |
783 | } | |
784 | ||
8dcb2003 JM |
785 | ext_rates_len = num_rates - supp_rates_len; |
786 | if (ext_rates_len > 0) { | |
8e664fb3 | 787 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
788 | *pos++ = ext_rates_len; |
789 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
790 | pos += ext_rates_len; | |
8e664fb3 JB |
791 | } |
792 | ||
651b5225 JM |
793 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
794 | *pos++ = WLAN_EID_DS_PARAMS; | |
795 | *pos++ = 1; | |
796 | *pos++ = channel; | |
797 | } | |
798 | ||
8e664fb3 JB |
799 | /* insert custom IEs that go before HT */ |
800 | if (ie && ie_len) { | |
801 | static const u8 before_ht[] = { | |
802 | WLAN_EID_SSID, | |
803 | WLAN_EID_SUPP_RATES, | |
804 | WLAN_EID_REQUEST, | |
805 | WLAN_EID_EXT_SUPP_RATES, | |
806 | WLAN_EID_DS_PARAMS, | |
807 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
808 | }; | |
809 | noffset = ieee80211_ie_split(ie, ie_len, | |
810 | before_ht, ARRAY_SIZE(before_ht), | |
811 | offset); | |
812 | memcpy(pos, ie + offset, noffset - offset); | |
813 | pos += noffset - offset; | |
814 | offset = noffset; | |
de95a54b JB |
815 | } |
816 | ||
5ef2d41a | 817 | if (sband->ht_cap.ht_supported) { |
f38fd12f JB |
818 | u16 cap = sband->ht_cap.cap; |
819 | __le16 tmp; | |
820 | ||
5ef2d41a JB |
821 | *pos++ = WLAN_EID_HT_CAPABILITY; |
822 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
823 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
f38fd12f | 824 | tmp = cpu_to_le16(cap); |
5ef2d41a JB |
825 | memcpy(pos, &tmp, sizeof(u16)); |
826 | pos += sizeof(u16); | |
5ef2d41a | 827 | *pos++ = sband->ht_cap.ampdu_factor | |
f38fd12f JB |
828 | (sband->ht_cap.ampdu_density << |
829 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
5ef2d41a JB |
830 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
831 | pos += sizeof(sband->ht_cap.mcs); | |
832 | pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ | |
833 | } | |
834 | ||
de95a54b JB |
835 | /* |
836 | * If adding more here, adjust code in main.c | |
837 | * that calculates local->scan_ies_len. | |
838 | */ | |
839 | ||
8e664fb3 JB |
840 | /* add any remaining custom IEs */ |
841 | if (ie && ie_len) { | |
842 | noffset = ie_len; | |
843 | memcpy(pos, ie + offset, noffset - offset); | |
844 | pos += noffset - offset; | |
de95a54b JB |
845 | } |
846 | ||
847 | return pos - buffer; | |
848 | } | |
849 | ||
a619a4c0 | 850 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
85a237fe | 851 | u8 *dst, u32 ratemask, |
a619a4c0 | 852 | const u8 *ssid, size_t ssid_len, |
a806c558 PS |
853 | const u8 *ie, size_t ie_len, |
854 | bool directed) | |
46900298 JB |
855 | { |
856 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
857 | struct sk_buff *skb; |
858 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
859 | size_t buf_len; |
860 | u8 *buf; | |
651b5225 | 861 | u8 chan; |
7c12ce8b KV |
862 | |
863 | /* FIXME: come up with a proper value */ | |
864 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
d15b8459 | 865 | if (!buf) |
a619a4c0 | 866 | return NULL; |
46900298 | 867 | |
a806c558 PS |
868 | /* |
869 | * Do not send DS Channel parameter for directed probe requests | |
870 | * in order to maximize the chance that we get a response. Some | |
871 | * badly-behaved APs don't respond when this parameter is included. | |
872 | */ | |
873 | if (directed) | |
874 | chan = 0; | |
875 | else | |
876 | chan = ieee80211_frequency_to_channel( | |
877 | local->hw.conf.channel->center_freq); | |
651b5225 | 878 | |
7c12ce8b | 879 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
8dcb2003 | 880 | local->hw.conf.channel->band, |
85a237fe | 881 | ratemask, chan); |
7c12ce8b KV |
882 | |
883 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
884 | ssid, ssid_len, | |
885 | buf, buf_len); | |
886 | ||
46900298 | 887 | if (dst) { |
7c12ce8b | 888 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
889 | memcpy(mgmt->da, dst, ETH_ALEN); |
890 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 891 | } |
46900298 | 892 | |
62ae67be | 893 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
145b6d1a | 894 | kfree(buf); |
a619a4c0 JO |
895 | |
896 | return skb; | |
897 | } | |
898 | ||
899 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
900 | const u8 *ssid, size_t ssid_len, | |
a806c558 | 901 | const u8 *ie, size_t ie_len, |
aad14ceb | 902 | u32 ratemask, bool directed, bool no_cck) |
a619a4c0 JO |
903 | { |
904 | struct sk_buff *skb; | |
905 | ||
85a237fe JB |
906 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, |
907 | ie, ie_len, directed); | |
aad14ceb RM |
908 | if (skb) { |
909 | if (no_cck) | |
910 | IEEE80211_SKB_CB(skb)->flags |= | |
911 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
a619a4c0 | 912 | ieee80211_tx_skb(sdata, skb); |
aad14ceb | 913 | } |
46900298 JB |
914 | } |
915 | ||
916 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
917 | struct ieee802_11_elems *elems, | |
918 | enum ieee80211_band band) | |
919 | { | |
920 | struct ieee80211_supported_band *sband; | |
921 | struct ieee80211_rate *bitrates; | |
922 | size_t num_rates; | |
923 | u32 supp_rates; | |
924 | int i, j; | |
925 | sband = local->hw.wiphy->bands[band]; | |
926 | ||
927 | if (!sband) { | |
928 | WARN_ON(1); | |
929 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
930 | } | |
931 | ||
932 | bitrates = sband->bitrates; | |
933 | num_rates = sband->n_bitrates; | |
934 | supp_rates = 0; | |
935 | for (i = 0; i < elems->supp_rates_len + | |
936 | elems->ext_supp_rates_len; i++) { | |
937 | u8 rate = 0; | |
938 | int own_rate; | |
939 | if (i < elems->supp_rates_len) | |
940 | rate = elems->supp_rates[i]; | |
941 | else if (elems->ext_supp_rates) | |
942 | rate = elems->ext_supp_rates | |
943 | [i - elems->supp_rates_len]; | |
944 | own_rate = 5 * (rate & 0x7f); | |
945 | for (j = 0; j < num_rates; j++) | |
946 | if (bitrates[j].bitrate == own_rate) | |
947 | supp_rates |= BIT(j); | |
948 | } | |
949 | return supp_rates; | |
950 | } | |
f2753ddb | 951 | |
84f6a01c JB |
952 | void ieee80211_stop_device(struct ieee80211_local *local) |
953 | { | |
954 | ieee80211_led_radio(local, false); | |
67408c8c | 955 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
84f6a01c JB |
956 | |
957 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
958 | |
959 | flush_workqueue(local->workqueue); | |
678f415f | 960 | drv_stop(local); |
84f6a01c JB |
961 | } |
962 | ||
f2753ddb JB |
963 | int ieee80211_reconfig(struct ieee80211_local *local) |
964 | { | |
965 | struct ieee80211_hw *hw = &local->hw; | |
966 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 967 | struct sta_info *sta; |
2683d65b | 968 | int res, i; |
5bb644a0 | 969 | |
eecc4800 | 970 | #ifdef CONFIG_PM |
ceb99fe0 JB |
971 | if (local->suspended) |
972 | local->resuming = true; | |
f2753ddb | 973 | |
eecc4800 JB |
974 | if (local->wowlan) { |
975 | local->wowlan = false; | |
976 | res = drv_resume(local); | |
977 | if (res < 0) { | |
978 | local->resuming = false; | |
979 | return res; | |
980 | } | |
981 | if (res == 0) | |
982 | goto wake_up; | |
983 | WARN_ON(res > 1); | |
984 | /* | |
985 | * res is 1, which means the driver requested | |
986 | * to go through a regular reset on wakeup. | |
987 | */ | |
988 | } | |
989 | #endif | |
990 | ||
94f9b97b JB |
991 | /* setup fragmentation threshold */ |
992 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
993 | ||
994 | /* setup RTS threshold */ | |
995 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
996 | ||
997 | /* reset coverage class */ | |
998 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
999 | ||
1000 | /* everything else happens only if HW was up & running */ | |
1001 | if (!local->open_count) | |
1002 | goto wake_up; | |
f2753ddb | 1003 | |
94f9b97b JB |
1004 | /* |
1005 | * Upon resume hardware can sometimes be goofy due to | |
1006 | * various platform / driver / bus issues, so restarting | |
1007 | * the device may at times not work immediately. Propagate | |
1008 | * the error. | |
1009 | */ | |
1010 | res = drv_start(local); | |
1011 | if (res) { | |
1012 | WARN(local->suspended, "Hardware became unavailable " | |
1013 | "upon resume. This could be a software issue " | |
1014 | "prior to suspend or a hardware issue.\n"); | |
1015 | return res; | |
f2753ddb JB |
1016 | } |
1017 | ||
94f9b97b JB |
1018 | ieee80211_led_radio(local, true); |
1019 | ieee80211_mod_tpt_led_trig(local, | |
1020 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1021 | ||
f2753ddb JB |
1022 | /* add interfaces */ |
1023 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1024 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1025 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f JB |
1026 | ieee80211_sdata_running(sdata)) |
1027 | res = drv_add_interface(local, &sdata->vif); | |
f2753ddb JB |
1028 | } |
1029 | ||
1030 | /* add STAs back */ | |
34e89507 JB |
1031 | mutex_lock(&local->sta_mtx); |
1032 | list_for_each_entry(sta, &local->sta_list, list) { | |
1033 | if (sta->uploaded) { | |
5bb644a0 | 1034 | sdata = sta->sdata; |
f2753ddb JB |
1035 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1036 | sdata = container_of(sdata->bss, | |
1037 | struct ieee80211_sub_if_data, | |
1038 | u.ap); | |
1039 | ||
f785d83a | 1040 | memset(&sta->sta.drv_priv, 0, hw->sta_data_size); |
34e89507 | 1041 | WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
f2753ddb | 1042 | } |
f2753ddb | 1043 | } |
34e89507 | 1044 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1045 | |
2683d65b | 1046 | /* reconfigure tx conf */ |
f6f3def3 EP |
1047 | list_for_each_entry(sdata, &local->interfaces, list) { |
1048 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1049 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1050 | !ieee80211_sdata_running(sdata)) | |
1051 | continue; | |
1052 | ||
1053 | for (i = 0; i < hw->queues; i++) | |
1054 | drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]); | |
1055 | } | |
2683d65b | 1056 | |
f2753ddb JB |
1057 | /* reconfigure hardware */ |
1058 | ieee80211_hw_config(local, ~0); | |
1059 | ||
f2753ddb | 1060 | ieee80211_configure_filter(local); |
f2753ddb JB |
1061 | |
1062 | /* Finally also reconfigure all the BSS information */ | |
1063 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1064 | u32 changed; |
1065 | ||
9607e6b6 | 1066 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1067 | continue; |
ac8dd506 JB |
1068 | |
1069 | /* common change flags for all interface types */ | |
1070 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1071 | BSS_CHANGED_ERP_PREAMBLE | | |
1072 | BSS_CHANGED_ERP_SLOT | | |
1073 | BSS_CHANGED_HT | | |
1074 | BSS_CHANGED_BASIC_RATES | | |
1075 | BSS_CHANGED_BEACON_INT | | |
1076 | BSS_CHANGED_BSSID | | |
4ced3f74 JB |
1077 | BSS_CHANGED_CQM | |
1078 | BSS_CHANGED_QOS; | |
ac8dd506 | 1079 | |
f2753ddb JB |
1080 | switch (sdata->vif.type) { |
1081 | case NL80211_IFTYPE_STATION: | |
ac8dd506 | 1082 | changed |= BSS_CHANGED_ASSOC; |
a7b545f7 | 1083 | mutex_lock(&sdata->u.mgd.mtx); |
ac8dd506 | 1084 | ieee80211_bss_info_change_notify(sdata, changed); |
a7b545f7 | 1085 | mutex_unlock(&sdata->u.mgd.mtx); |
ac8dd506 | 1086 | break; |
f2753ddb | 1087 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1088 | changed |= BSS_CHANGED_IBSS; |
1089 | /* fall through */ | |
f2753ddb | 1090 | case NL80211_IFTYPE_AP: |
7827493b AN |
1091 | changed |= BSS_CHANGED_SSID; |
1092 | /* fall through */ | |
f2753ddb | 1093 | case NL80211_IFTYPE_MESH_POINT: |
ac8dd506 JB |
1094 | changed |= BSS_CHANGED_BEACON | |
1095 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1096 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1097 | break; |
1098 | case NL80211_IFTYPE_WDS: | |
1099 | break; | |
1100 | case NL80211_IFTYPE_AP_VLAN: | |
1101 | case NL80211_IFTYPE_MONITOR: | |
1102 | /* ignore virtual */ | |
1103 | break; | |
1104 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1105 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1106 | case NL80211_IFTYPE_P2P_CLIENT: |
1107 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1108 | WARN_ON(1); |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | ||
2a419056 JB |
1113 | /* |
1114 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1115 | * sessions can be established after a resume. | |
1116 | * | |
1117 | * Also tear down aggregation sessions since reconfiguring | |
1118 | * them in a hardware restart scenario is not easily done | |
1119 | * right now, and the hardware will have lost information | |
1120 | * about the sessions, but we and the AP still think they | |
1121 | * are active. This is really a workaround though. | |
1122 | */ | |
74e2bd1f | 1123 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1124 | mutex_lock(&local->sta_mtx); |
1125 | ||
1126 | list_for_each_entry(sta, &local->sta_list, list) { | |
53f73c09 | 1127 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
2a419056 | 1128 | clear_sta_flags(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1129 | } |
2a419056 JB |
1130 | |
1131 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1132 | } |
74e2bd1f | 1133 | |
f2753ddb JB |
1134 | /* add back keys */ |
1135 | list_for_each_entry(sdata, &local->interfaces, list) | |
9607e6b6 | 1136 | if (ieee80211_sdata_running(sdata)) |
f2753ddb JB |
1137 | ieee80211_enable_keys(sdata); |
1138 | ||
eecc4800 | 1139 | wake_up: |
f2753ddb JB |
1140 | ieee80211_wake_queues_by_reason(hw, |
1141 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1142 | ||
5bb644a0 JB |
1143 | /* |
1144 | * If this is for hw restart things are still running. | |
1145 | * We may want to change that later, however. | |
1146 | */ | |
ceb99fe0 | 1147 | if (!local->suspended) |
5bb644a0 JB |
1148 | return 0; |
1149 | ||
1150 | #ifdef CONFIG_PM | |
ceb99fe0 | 1151 | /* first set suspended false, then resuming */ |
5bb644a0 | 1152 | local->suspended = false; |
ceb99fe0 JB |
1153 | mb(); |
1154 | local->resuming = false; | |
5bb644a0 JB |
1155 | |
1156 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1157 | switch(sdata->vif.type) { | |
1158 | case NL80211_IFTYPE_STATION: | |
1159 | ieee80211_sta_restart(sdata); | |
1160 | break; | |
1161 | case NL80211_IFTYPE_ADHOC: | |
1162 | ieee80211_ibss_restart(sdata); | |
1163 | break; | |
1164 | case NL80211_IFTYPE_MESH_POINT: | |
1165 | ieee80211_mesh_restart(sdata); | |
1166 | break; | |
1167 | default: | |
1168 | break; | |
1169 | } | |
1170 | } | |
1171 | ||
26d59535 | 1172 | mod_timer(&local->sta_cleanup, jiffies + 1); |
5bb644a0 | 1173 | |
34e89507 | 1174 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1175 | list_for_each_entry(sta, &local->sta_list, list) |
1176 | mesh_plink_restart(sta); | |
34e89507 | 1177 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1178 | #else |
1179 | WARN_ON(1); | |
1180 | #endif | |
f2753ddb JB |
1181 | return 0; |
1182 | } | |
42935eca | 1183 | |
95acac61 JB |
1184 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
1185 | { | |
1186 | struct ieee80211_sub_if_data *sdata; | |
1187 | struct ieee80211_local *local; | |
1188 | struct ieee80211_key *key; | |
1189 | ||
1190 | if (WARN_ON(!vif)) | |
1191 | return; | |
1192 | ||
1193 | sdata = vif_to_sdata(vif); | |
1194 | local = sdata->local; | |
1195 | ||
1196 | if (WARN_ON(!local->resuming)) | |
1197 | return; | |
1198 | ||
1199 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1200 | return; | |
1201 | ||
1202 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1203 | ||
1204 | mutex_lock(&local->key_mtx); | |
1205 | list_for_each_entry(key, &sdata->key_list, list) | |
1206 | key->flags |= KEY_FLAG_TAINTED; | |
1207 | mutex_unlock(&local->key_mtx); | |
1208 | } | |
1209 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1210 | ||
0f78231b JB |
1211 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1212 | enum ieee80211_smps_mode *smps_mode) | |
1213 | { | |
1214 | if (ifmgd->associated) { | |
1215 | *smps_mode = ifmgd->ap_smps; | |
1216 | ||
1217 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1218 | if (ifmgd->powersave) | |
1219 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1220 | else | |
1221 | *smps_mode = IEEE80211_SMPS_OFF; | |
1222 | } | |
1223 | ||
1224 | return 1; | |
1225 | } | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* must hold iflist_mtx */ | |
025e6be2 | 1231 | void ieee80211_recalc_smps(struct ieee80211_local *local) |
0f78231b JB |
1232 | { |
1233 | struct ieee80211_sub_if_data *sdata; | |
1234 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1235 | int count = 0; | |
1236 | ||
46a5ebaf | 1237 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1238 | |
1239 | /* | |
1240 | * This function could be improved to handle multiple | |
1241 | * interfaces better, but right now it makes any | |
1242 | * non-station interfaces force SM PS to be turned | |
1243 | * off. If there are multiple station interfaces it | |
1244 | * could also use the best possible mode, e.g. if | |
1245 | * one is in static and the other in dynamic then | |
1246 | * dynamic is ok. | |
1247 | */ | |
1248 | ||
1249 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1250 | if (!ieee80211_sdata_running(sdata)) |
0f78231b JB |
1251 | continue; |
1252 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1253 | goto set; | |
025e6be2 JB |
1254 | |
1255 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
0f78231b JB |
1256 | |
1257 | if (count > 1) { | |
1258 | smps_mode = IEEE80211_SMPS_OFF; | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | if (smps_mode == local->smps_mode) | |
1264 | return; | |
1265 | ||
1266 | set: | |
1267 | local->smps_mode = smps_mode; | |
1268 | /* changed flag is auto-detected for this */ | |
1269 | ieee80211_hw_config(local, 0); | |
1270 | } | |
8e664fb3 JB |
1271 | |
1272 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1273 | { | |
1274 | int i; | |
1275 | ||
1276 | for (i = 0; i < n_ids; i++) | |
1277 | if (ids[i] == id) | |
1278 | return true; | |
1279 | return false; | |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1284 | * | |
1285 | * @ies: the IE buffer | |
1286 | * @ielen: the length of the IE buffer | |
1287 | * @ids: an array with element IDs that are allowed before | |
1288 | * the split | |
1289 | * @n_ids: the size of the element ID array | |
1290 | * @offset: offset where to start splitting in the buffer | |
1291 | * | |
1292 | * This function splits an IE buffer by updating the @offset | |
1293 | * variable to point to the location where the buffer should be | |
1294 | * split. | |
1295 | * | |
1296 | * It assumes that the given IE buffer is well-formed, this | |
1297 | * has to be guaranteed by the caller! | |
1298 | * | |
1299 | * It also assumes that the IEs in the buffer are ordered | |
1300 | * correctly, if not the result of using this function will not | |
1301 | * be ordered correctly either, i.e. it does no reordering. | |
1302 | * | |
1303 | * The function returns the offset where the next part of the | |
1304 | * buffer starts, which may be @ielen if the entire (remainder) | |
1305 | * of the buffer should be used. | |
1306 | */ | |
1307 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1308 | const u8 *ids, int n_ids, size_t offset) | |
1309 | { | |
1310 | size_t pos = offset; | |
1311 | ||
1312 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1313 | pos += 2 + ies[pos + 1]; | |
1314 | ||
1315 | return pos; | |
1316 | } | |
1317 | ||
1318 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1319 | { | |
1320 | size_t pos = offset; | |
1321 | ||
1322 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1323 | pos += 2 + ies[pos + 1]; | |
1324 | ||
1325 | return pos; | |
1326 | } | |
615f7b9b MV |
1327 | |
1328 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1329 | int rssi_min_thold, | |
1330 | int rssi_max_thold) | |
1331 | { | |
1332 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1333 | ||
1334 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1335 | return; | |
1336 | ||
1337 | /* | |
1338 | * Scale up threshold values before storing it, as the RSSI averaging | |
1339 | * algorithm uses a scaled up value as well. Change this scaling | |
1340 | * factor if the RSSI averaging algorithm changes. | |
1341 | */ | |
1342 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1343 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1344 | } | |
1345 | ||
1346 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1347 | int rssi_min_thold, | |
1348 | int rssi_max_thold) | |
1349 | { | |
1350 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1351 | ||
1352 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1353 | rssi_min_thold > rssi_max_thold); | |
1354 | ||
1355 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1356 | rssi_max_thold); | |
1357 | } | |
1358 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1359 | ||
1360 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1361 | { | |
1362 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1363 | ||
1364 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1365 | } | |
1366 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); |