Commit | Line | Data |
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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> | |
bc3b2d7f | 16 | #include <linux/export.h> |
c2d1560a JB |
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> | |
c2d1560a | 22 | #include <linux/bitmap.h> |
881d966b | 23 | #include <net/net_namespace.h> |
c2d1560a | 24 | #include <net/cfg80211.h> |
dabeb344 | 25 | #include <net/rtnetlink.h> |
c2d1560a JB |
26 | |
27 | #include "ieee80211_i.h" | |
24487981 | 28 | #include "driver-ops.h" |
2c8dccc7 | 29 | #include "rate.h" |
ee385855 | 30 | #include "mesh.h" |
c2d1560a | 31 | #include "wme.h" |
f2753ddb | 32 | #include "led.h" |
fffd0934 | 33 | #include "wep.h" |
c2d1560a JB |
34 | |
35 | /* privid for wiphys to determine whether they belong to us or not */ | |
36 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
37 | ||
9a95371a LR |
38 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
39 | { | |
40 | struct ieee80211_local *local; | |
41 | BUG_ON(!wiphy); | |
42 | ||
43 | local = wiphy_priv(wiphy); | |
44 | return &local->hw; | |
45 | } | |
46 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 47 | |
71364716 | 48 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 49 | enum nl80211_iftype type) |
c2d1560a | 50 | { |
a494bb1c | 51 | __le16 fc = hdr->frame_control; |
c2d1560a | 52 | |
98f0b0a3 RR |
53 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
54 | if (len < 16) | |
c2d1560a JB |
55 | return NULL; |
56 | ||
a494bb1c | 57 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
58 | if (len < 24) /* drop incorrect hdr len (data) */ |
59 | return NULL; | |
a494bb1c HH |
60 | |
61 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 62 | return NULL; |
a494bb1c HH |
63 | if (ieee80211_has_tods(fc)) |
64 | return hdr->addr1; | |
65 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 66 | return hdr->addr2; |
a494bb1c HH |
67 | |
68 | return hdr->addr3; | |
69 | } | |
70 | ||
71 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
72 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
73 | return NULL; | |
c2d1560a | 74 | return hdr->addr3; |
a494bb1c HH |
75 | } |
76 | ||
77 | if (ieee80211_is_ctl(fc)) { | |
78 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 79 | return hdr->addr1; |
a494bb1c HH |
80 | |
81 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 82 | switch (type) { |
05c914fe | 83 | case NL80211_IFTYPE_STATION: |
71364716 | 84 | return hdr->addr2; |
05c914fe JB |
85 | case NL80211_IFTYPE_AP: |
86 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
87 | return hdr->addr1; |
88 | default: | |
a494bb1c | 89 | break; /* fall through to the return */ |
71364716 RR |
90 | } |
91 | } | |
c2d1560a JB |
92 | } |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
5cf121c3 | 97 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 98 | { |
2de8e0d9 JB |
99 | struct sk_buff *skb = tx->skb; |
100 | struct ieee80211_hdr *hdr; | |
101 | ||
102 | do { | |
103 | hdr = (struct ieee80211_hdr *) skb->data; | |
104 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
105 | } while ((skb = skb->next)); | |
c2d1560a JB |
106 | } |
107 | ||
108 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
109 | int rate, int erp, int short_preamble) | |
110 | { | |
111 | int dur; | |
112 | ||
113 | /* calculate duration (in microseconds, rounded up to next higher | |
114 | * integer if it includes a fractional microsecond) to send frame of | |
115 | * len bytes (does not include FCS) at the given rate. Duration will | |
116 | * also include SIFS. | |
117 | * | |
118 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
119 | * DIV_ROUND_UP() operations. | |
120 | */ | |
121 | ||
8318d78a | 122 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
123 | /* |
124 | * OFDM: | |
125 | * | |
126 | * N_DBPS = DATARATE x 4 | |
127 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
128 | * (16 = SIGNAL time, 6 = tail bits) | |
129 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
130 | * | |
131 | * T_SYM = 4 usec | |
132 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
133 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
134 | * signal ext = 6 usec | |
135 | */ | |
c2d1560a JB |
136 | dur = 16; /* SIFS + signal ext */ |
137 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
138 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
139 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
140 | 4 * rate); /* T_SYM x N_SYM */ | |
141 | } else { | |
142 | /* | |
143 | * 802.11b or 802.11g with 802.11b compatibility: | |
144 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
145 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
146 | * | |
147 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
148 | * aSIFSTime = 10 usec | |
149 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
150 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
151 | */ | |
152 | dur = 10; /* aSIFSTime = 10 usec */ | |
153 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
154 | ||
155 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
156 | } | |
157 | ||
158 | return dur; | |
159 | } | |
160 | ||
161 | /* Exported duration function for driver use */ | |
32bfd35d JB |
162 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
163 | struct ieee80211_vif *vif, | |
8318d78a JB |
164 | size_t frame_len, |
165 | struct ieee80211_rate *rate) | |
c2d1560a JB |
166 | { |
167 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 168 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
169 | u16 dur; |
170 | int erp; | |
25d834e1 | 171 | bool short_preamble = false; |
c2d1560a | 172 | |
8318d78a | 173 | erp = 0; |
25d834e1 JB |
174 | if (vif) { |
175 | sdata = vif_to_sdata(vif); | |
bda3933a | 176 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
177 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
178 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
179 | } | |
8318d78a JB |
180 | |
181 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 182 | short_preamble); |
c2d1560a JB |
183 | |
184 | return cpu_to_le16(dur); | |
185 | } | |
186 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
187 | ||
32bfd35d JB |
188 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
189 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 190 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
191 | { |
192 | struct ieee80211_local *local = hw_to_local(hw); | |
193 | struct ieee80211_rate *rate; | |
25d834e1 | 194 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 195 | bool short_preamble; |
c2d1560a JB |
196 | int erp; |
197 | u16 dur; | |
2e92e6f2 JB |
198 | struct ieee80211_supported_band *sband; |
199 | ||
200 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 201 | |
25d834e1 | 202 | short_preamble = false; |
7e9ed188 | 203 | |
e039fa4a | 204 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
205 | |
206 | erp = 0; | |
25d834e1 JB |
207 | if (vif) { |
208 | sdata = vif_to_sdata(vif); | |
bda3933a | 209 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
210 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
211 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
212 | } | |
c2d1560a JB |
213 | |
214 | /* CTS duration */ | |
8318d78a | 215 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
216 | erp, short_preamble); |
217 | /* Data frame duration */ | |
8318d78a | 218 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
219 | erp, short_preamble); |
220 | /* ACK duration */ | |
8318d78a | 221 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
222 | erp, short_preamble); |
223 | ||
224 | return cpu_to_le16(dur); | |
225 | } | |
226 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
227 | ||
32bfd35d JB |
228 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
229 | struct ieee80211_vif *vif, | |
c2d1560a | 230 | size_t frame_len, |
e039fa4a | 231 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
232 | { |
233 | struct ieee80211_local *local = hw_to_local(hw); | |
234 | struct ieee80211_rate *rate; | |
25d834e1 | 235 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 236 | bool short_preamble; |
c2d1560a JB |
237 | int erp; |
238 | u16 dur; | |
2e92e6f2 JB |
239 | struct ieee80211_supported_band *sband; |
240 | ||
241 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 242 | |
25d834e1 | 243 | short_preamble = false; |
7e9ed188 | 244 | |
e039fa4a | 245 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 246 | erp = 0; |
25d834e1 JB |
247 | if (vif) { |
248 | sdata = vif_to_sdata(vif); | |
bda3933a | 249 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
250 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
251 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
252 | } | |
c2d1560a JB |
253 | |
254 | /* Data frame duration */ | |
8318d78a | 255 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 256 | erp, short_preamble); |
e039fa4a | 257 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 258 | /* ACK duration */ |
8318d78a | 259 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
260 | erp, short_preamble); |
261 | } | |
262 | ||
263 | return cpu_to_le16(dur); | |
264 | } | |
265 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
266 | ||
ce7c9111 KV |
267 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
268 | enum queue_stop_reason reason) | |
c2d1560a JB |
269 | { |
270 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 271 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 272 | |
b5878a2d JB |
273 | trace_wake_queue(local, queue, reason); |
274 | ||
e4e72fb4 JB |
275 | if (WARN_ON(queue >= hw->queues)) |
276 | return; | |
ce7c9111 | 277 | |
96f5e66e JB |
278 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
279 | ||
280 | if (local->queue_stop_reasons[queue] != 0) | |
281 | /* someone still has this queue stopped */ | |
282 | return; | |
283 | ||
7236fe29 JB |
284 | if (skb_queue_empty(&local->pending[queue])) { |
285 | rcu_read_lock(); | |
5b714c6a JB |
286 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
287 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
288 | continue; | |
2337db8d | 289 | netif_wake_subqueue(sdata->dev, queue); |
5b714c6a | 290 | } |
7236fe29 JB |
291 | rcu_read_unlock(); |
292 | } else | |
3b8d81e0 | 293 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 294 | } |
ce7c9111 | 295 | |
96f5e66e JB |
296 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
297 | enum queue_stop_reason reason) | |
ce7c9111 KV |
298 | { |
299 | struct ieee80211_local *local = hw_to_local(hw); | |
300 | unsigned long flags; | |
301 | ||
302 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
303 | __ieee80211_wake_queue(hw, queue, reason); | |
304 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
305 | } | |
306 | ||
307 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
308 | { | |
309 | ieee80211_wake_queue_by_reason(hw, queue, | |
310 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
311 | } | |
c2d1560a JB |
312 | EXPORT_SYMBOL(ieee80211_wake_queue); |
313 | ||
ce7c9111 KV |
314 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
315 | enum queue_stop_reason reason) | |
c2d1560a JB |
316 | { |
317 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 318 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 319 | |
b5878a2d JB |
320 | trace_stop_queue(local, queue, reason); |
321 | ||
e4e72fb4 JB |
322 | if (WARN_ON(queue >= hw->queues)) |
323 | return; | |
96f5e66e | 324 | |
2a577d98 | 325 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 JB |
326 | |
327 | rcu_read_lock(); | |
328 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 329 | netif_stop_subqueue(sdata->dev, queue); |
cf0277e7 | 330 | rcu_read_unlock(); |
c2d1560a | 331 | } |
ce7c9111 | 332 | |
96f5e66e JB |
333 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
334 | enum queue_stop_reason reason) | |
ce7c9111 KV |
335 | { |
336 | struct ieee80211_local *local = hw_to_local(hw); | |
337 | unsigned long flags; | |
338 | ||
339 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
340 | __ieee80211_stop_queue(hw, queue, reason); | |
341 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
342 | } | |
343 | ||
344 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
345 | { | |
346 | ieee80211_stop_queue_by_reason(hw, queue, | |
347 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
348 | } | |
c2d1560a JB |
349 | EXPORT_SYMBOL(ieee80211_stop_queue); |
350 | ||
8f77f384 JB |
351 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
352 | struct sk_buff *skb) | |
353 | { | |
354 | struct ieee80211_hw *hw = &local->hw; | |
355 | unsigned long flags; | |
356 | int queue = skb_get_queue_mapping(skb); | |
a7bc376c JB |
357 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
358 | ||
359 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 360 | kfree_skb(skb); |
a7bc376c JB |
361 | return; |
362 | } | |
8f77f384 JB |
363 | |
364 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
365 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 366 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
367 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
368 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
369 | } | |
370 | ||
b0b97a8a JB |
371 | void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
372 | struct sk_buff_head *skbs, | |
373 | void (*fn)(void *data), void *data) | |
8f77f384 JB |
374 | { |
375 | struct ieee80211_hw *hw = &local->hw; | |
376 | struct sk_buff *skb; | |
377 | unsigned long flags; | |
b0b97a8a | 378 | int queue, i; |
8f77f384 JB |
379 | |
380 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
381 | for (i = 0; i < hw->queues; i++) | |
382 | __ieee80211_stop_queue(hw, i, | |
383 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
384 | ||
385 | while ((skb = skb_dequeue(skbs))) { | |
a7bc376c JB |
386 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
387 | ||
388 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 389 | kfree_skb(skb); |
a7bc376c JB |
390 | continue; |
391 | } | |
392 | ||
8f77f384 | 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 | 403 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
8f77f384 JB |
404 | } |
405 | ||
b0b97a8a JB |
406 | void ieee80211_add_pending_skbs(struct ieee80211_local *local, |
407 | struct sk_buff_head *skbs) | |
50a9432d | 408 | { |
b0b97a8a | 409 | ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL); |
50a9432d JB |
410 | } |
411 | ||
ce7c9111 KV |
412 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
413 | enum queue_stop_reason reason) | |
c2d1560a | 414 | { |
ce7c9111 KV |
415 | struct ieee80211_local *local = hw_to_local(hw); |
416 | unsigned long flags; | |
c2d1560a JB |
417 | int i; |
418 | ||
ce7c9111 KV |
419 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
420 | ||
96f5e66e | 421 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
422 | __ieee80211_stop_queue(hw, i, reason); |
423 | ||
424 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
425 | } | |
426 | ||
427 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
428 | { | |
429 | ieee80211_stop_queues_by_reason(hw, | |
430 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
431 | } |
432 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
433 | ||
92ab8535 TW |
434 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
435 | { | |
436 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
437 | unsigned long flags; |
438 | int ret; | |
96f5e66e | 439 | |
e4e72fb4 JB |
440 | if (WARN_ON(queue >= hw->queues)) |
441 | return true; | |
96f5e66e | 442 | |
3b8d81e0 JB |
443 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
444 | ret = !!local->queue_stop_reasons[queue]; | |
445 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
446 | return ret; | |
92ab8535 TW |
447 | } |
448 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
449 | ||
ce7c9111 KV |
450 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
451 | enum queue_stop_reason reason) | |
c2d1560a | 452 | { |
ce7c9111 KV |
453 | struct ieee80211_local *local = hw_to_local(hw); |
454 | unsigned long flags; | |
c2d1560a JB |
455 | int i; |
456 | ||
ce7c9111 KV |
457 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
458 | ||
e4e72fb4 | 459 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
460 | __ieee80211_wake_queue(hw, i, reason); |
461 | ||
462 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
463 | } | |
464 | ||
465 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
466 | { | |
467 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
468 | } |
469 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 470 | |
32bfd35d JB |
471 | void ieee80211_iterate_active_interfaces( |
472 | struct ieee80211_hw *hw, | |
473 | void (*iterator)(void *data, u8 *mac, | |
474 | struct ieee80211_vif *vif), | |
475 | void *data) | |
dabeb344 JB |
476 | { |
477 | struct ieee80211_local *local = hw_to_local(hw); | |
478 | struct ieee80211_sub_if_data *sdata; | |
479 | ||
c771c9d8 | 480 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
481 | |
482 | list_for_each_entry(sdata, &local->interfaces, list) { | |
483 | switch (sdata->vif.type) { | |
05c914fe JB |
484 | case NL80211_IFTYPE_MONITOR: |
485 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 486 | continue; |
2ca27bcf | 487 | default: |
2f561feb ID |
488 | break; |
489 | } | |
9607e6b6 | 490 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 491 | iterator(data, sdata->vif.addr, |
2f561feb ID |
492 | &sdata->vif); |
493 | } | |
494 | ||
c771c9d8 | 495 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
496 | } |
497 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
498 | ||
499 | void ieee80211_iterate_active_interfaces_atomic( | |
500 | struct ieee80211_hw *hw, | |
501 | void (*iterator)(void *data, u8 *mac, | |
502 | struct ieee80211_vif *vif), | |
503 | void *data) | |
504 | { | |
505 | struct ieee80211_local *local = hw_to_local(hw); | |
506 | struct ieee80211_sub_if_data *sdata; | |
507 | ||
e38bad47 | 508 | rcu_read_lock(); |
dabeb344 | 509 | |
e38bad47 | 510 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 511 | switch (sdata->vif.type) { |
05c914fe JB |
512 | case NL80211_IFTYPE_MONITOR: |
513 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 514 | continue; |
2ca27bcf | 515 | default: |
dabeb344 JB |
516 | break; |
517 | } | |
9607e6b6 | 518 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 519 | iterator(data, sdata->vif.addr, |
32bfd35d | 520 | &sdata->vif); |
dabeb344 | 521 | } |
e38bad47 JB |
522 | |
523 | rcu_read_unlock(); | |
dabeb344 | 524 | } |
2f561feb | 525 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 526 | |
42935eca LR |
527 | /* |
528 | * Nothing should have been stuffed into the workqueue during | |
529 | * the suspend->resume cycle. If this WARN is seen then there | |
530 | * is a bug with either the driver suspend or something in | |
531 | * mac80211 stuffing into the workqueue which we haven't yet | |
532 | * cleared during mac80211's suspend cycle. | |
533 | */ | |
534 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
535 | { | |
ceb99fe0 JB |
536 | if (WARN(local->suspended && !local->resuming, |
537 | "queueing ieee80211 work while going to suspend\n")) | |
538 | return false; | |
42935eca LR |
539 | |
540 | return true; | |
541 | } | |
542 | ||
543 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
544 | { | |
545 | struct ieee80211_local *local = hw_to_local(hw); | |
546 | ||
547 | if (!ieee80211_can_queue_work(local)) | |
548 | return; | |
549 | ||
550 | queue_work(local->workqueue, work); | |
551 | } | |
552 | EXPORT_SYMBOL(ieee80211_queue_work); | |
553 | ||
554 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
555 | struct delayed_work *dwork, | |
556 | unsigned long delay) | |
557 | { | |
558 | struct ieee80211_local *local = hw_to_local(hw); | |
559 | ||
560 | if (!ieee80211_can_queue_work(local)) | |
561 | return; | |
562 | ||
563 | queue_delayed_work(local->workqueue, dwork, delay); | |
564 | } | |
565 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
566 | ||
37ffc8da JB |
567 | void ieee802_11_parse_elems(u8 *start, size_t len, |
568 | struct ieee802_11_elems *elems) | |
d91f36db JB |
569 | { |
570 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
571 | } | |
572 | ||
5825fe10 JB |
573 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
574 | { | |
575 | struct ieee80211_local *local = sdata->local; | |
576 | struct ieee80211_tx_queue_params qparam; | |
aa837e1d JB |
577 | int queue; |
578 | bool use_11b; | |
579 | int aCWmin, aCWmax; | |
5825fe10 JB |
580 | |
581 | if (!local->ops->conf_tx) | |
582 | return; | |
583 | ||
584 | memset(&qparam, 0, sizeof(qparam)); | |
585 | ||
aa837e1d JB |
586 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
587 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 588 | |
aa837e1d JB |
589 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
590 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
591 | aCWmax = 1023; | |
592 | if (use_11b) | |
593 | aCWmin = 31; | |
594 | else | |
595 | aCWmin = 15; | |
596 | ||
597 | switch (queue) { | |
598 | case 3: /* AC_BK */ | |
7ba10a8e JB |
599 | qparam.cw_max = aCWmax; |
600 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
601 | qparam.txop = 0; |
602 | qparam.aifs = 7; | |
603 | break; | |
604 | default: /* never happens but let's not leave undefined */ | |
605 | case 2: /* AC_BE */ | |
7ba10a8e JB |
606 | qparam.cw_max = aCWmax; |
607 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
608 | qparam.txop = 0; |
609 | qparam.aifs = 3; | |
610 | break; | |
611 | case 1: /* AC_VI */ | |
612 | qparam.cw_max = aCWmin; | |
613 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
614 | if (use_11b) | |
615 | qparam.txop = 6016/32; | |
616 | else | |
617 | qparam.txop = 3008/32; | |
618 | qparam.aifs = 2; | |
619 | break; | |
620 | case 0: /* AC_VO */ | |
621 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
622 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
623 | if (use_11b) | |
624 | qparam.txop = 3264/32; | |
625 | else | |
626 | qparam.txop = 1504/32; | |
627 | qparam.aifs = 2; | |
628 | break; | |
629 | } | |
5825fe10 | 630 | |
ab13315a KV |
631 | qparam.uapsd = false; |
632 | ||
f6f3def3 EP |
633 | sdata->tx_conf[queue] = qparam; |
634 | drv_conf_tx(local, sdata, queue, &qparam); | |
aa837e1d | 635 | } |
e1b3ec1a SG |
636 | |
637 | /* after reinitialize QoS TX queues setting to default, | |
638 | * disable QoS at all */ | |
d9734979 S |
639 | |
640 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { | |
641 | sdata->vif.bss_conf.qos = | |
642 | sdata->vif.type != NL80211_IFTYPE_STATION; | |
643 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); | |
644 | } | |
5825fe10 | 645 | } |
e50db65c | 646 | |
46900298 JB |
647 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
648 | const size_t supp_rates_len, | |
649 | const u8 *supp_rates) | |
650 | { | |
651 | struct ieee80211_local *local = sdata->local; | |
652 | int i, have_higher_than_11mbit = 0; | |
653 | ||
654 | /* cf. IEEE 802.11 9.2.12 */ | |
655 | for (i = 0; i < supp_rates_len; i++) | |
656 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
657 | have_higher_than_11mbit = 1; | |
658 | ||
659 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
660 | have_higher_than_11mbit) | |
661 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
662 | else | |
663 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
664 | ||
665 | ieee80211_set_wmm_default(sdata); | |
666 | } | |
667 | ||
881d948c | 668 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
669 | enum ieee80211_band band) |
670 | { | |
671 | struct ieee80211_supported_band *sband; | |
672 | struct ieee80211_rate *bitrates; | |
881d948c | 673 | u32 mandatory_rates; |
96dd22ac JB |
674 | enum ieee80211_rate_flags mandatory_flag; |
675 | int i; | |
676 | ||
677 | sband = local->hw.wiphy->bands[band]; | |
678 | if (!sband) { | |
679 | WARN_ON(1); | |
680 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
681 | } | |
682 | ||
683 | if (band == IEEE80211_BAND_2GHZ) | |
684 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
685 | else | |
686 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
687 | ||
688 | bitrates = sband->bitrates; | |
689 | mandatory_rates = 0; | |
690 | for (i = 0; i < sband->n_bitrates; i++) | |
691 | if (bitrates[i].flags & mandatory_flag) | |
692 | mandatory_rates |= BIT(i); | |
693 | return mandatory_rates; | |
694 | } | |
46900298 JB |
695 | |
696 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
697 | u16 transaction, u16 auth_alg, | |
fffd0934 JB |
698 | u8 *extra, size_t extra_len, const u8 *bssid, |
699 | const u8 *key, u8 key_len, u8 key_idx) | |
46900298 JB |
700 | { |
701 | struct ieee80211_local *local = sdata->local; | |
702 | struct sk_buff *skb; | |
703 | struct ieee80211_mgmt *mgmt; | |
fffd0934 | 704 | int err; |
46900298 JB |
705 | |
706 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 707 | sizeof(*mgmt) + 6 + extra_len); |
d15b8459 | 708 | if (!skb) |
46900298 | 709 | return; |
d15b8459 | 710 | |
46900298 JB |
711 | skb_reserve(skb, local->hw.extra_tx_headroom); |
712 | ||
713 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
714 | memset(mgmt, 0, 24 + 6); | |
715 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
716 | IEEE80211_STYPE_AUTH); | |
46900298 | 717 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 718 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
719 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
720 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
721 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
722 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
723 | if (extra) | |
724 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 725 | |
fffd0934 JB |
726 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
727 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
728 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
729 | WARN_ON(err); | |
730 | } | |
731 | ||
62ae67be JB |
732 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
733 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
734 | } |
735 | ||
de95a54b | 736 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 737 | const u8 *ie, size_t ie_len, |
651b5225 JM |
738 | enum ieee80211_band band, u32 rate_mask, |
739 | u8 channel) | |
de95a54b JB |
740 | { |
741 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
742 | u8 *pos; |
743 | size_t offset = 0, noffset; | |
744 | int supp_rates_len, i; | |
8dcb2003 JM |
745 | u8 rates[32]; |
746 | int num_rates; | |
747 | int ext_rates_len; | |
de95a54b | 748 | |
4d36ec58 | 749 | sband = local->hw.wiphy->bands[band]; |
de95a54b JB |
750 | |
751 | pos = buffer; | |
752 | ||
8dcb2003 JM |
753 | num_rates = 0; |
754 | for (i = 0; i < sband->n_bitrates; i++) { | |
755 | if ((BIT(i) & rate_mask) == 0) | |
756 | continue; /* skip rate */ | |
757 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
758 | } | |
759 | ||
760 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 761 | |
de95a54b | 762 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 763 | *pos++ = supp_rates_len; |
8dcb2003 JM |
764 | memcpy(pos, rates, supp_rates_len); |
765 | pos += supp_rates_len; | |
8e664fb3 JB |
766 | |
767 | /* insert "request information" if in custom IEs */ | |
768 | if (ie && ie_len) { | |
769 | static const u8 before_extrates[] = { | |
770 | WLAN_EID_SSID, | |
771 | WLAN_EID_SUPP_RATES, | |
772 | WLAN_EID_REQUEST, | |
773 | }; | |
774 | noffset = ieee80211_ie_split(ie, ie_len, | |
775 | before_extrates, | |
776 | ARRAY_SIZE(before_extrates), | |
777 | offset); | |
778 | memcpy(pos, ie + offset, noffset - offset); | |
779 | pos += noffset - offset; | |
780 | offset = noffset; | |
781 | } | |
782 | ||
8dcb2003 JM |
783 | ext_rates_len = num_rates - supp_rates_len; |
784 | if (ext_rates_len > 0) { | |
8e664fb3 | 785 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
786 | *pos++ = ext_rates_len; |
787 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
788 | pos += ext_rates_len; | |
8e664fb3 JB |
789 | } |
790 | ||
651b5225 JM |
791 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
792 | *pos++ = WLAN_EID_DS_PARAMS; | |
793 | *pos++ = 1; | |
794 | *pos++ = channel; | |
795 | } | |
796 | ||
8e664fb3 JB |
797 | /* insert custom IEs that go before HT */ |
798 | if (ie && ie_len) { | |
799 | static const u8 before_ht[] = { | |
800 | WLAN_EID_SSID, | |
801 | WLAN_EID_SUPP_RATES, | |
802 | WLAN_EID_REQUEST, | |
803 | WLAN_EID_EXT_SUPP_RATES, | |
804 | WLAN_EID_DS_PARAMS, | |
805 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
806 | }; | |
807 | noffset = ieee80211_ie_split(ie, ie_len, | |
808 | before_ht, ARRAY_SIZE(before_ht), | |
809 | offset); | |
810 | memcpy(pos, ie + offset, noffset - offset); | |
811 | pos += noffset - offset; | |
812 | offset = noffset; | |
de95a54b JB |
813 | } |
814 | ||
5ef2d41a | 815 | if (sband->ht_cap.ht_supported) { |
f38fd12f JB |
816 | u16 cap = sband->ht_cap.cap; |
817 | __le16 tmp; | |
818 | ||
5ef2d41a JB |
819 | *pos++ = WLAN_EID_HT_CAPABILITY; |
820 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
821 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
f38fd12f | 822 | tmp = cpu_to_le16(cap); |
5ef2d41a JB |
823 | memcpy(pos, &tmp, sizeof(u16)); |
824 | pos += sizeof(u16); | |
5ef2d41a | 825 | *pos++ = sband->ht_cap.ampdu_factor | |
f38fd12f JB |
826 | (sband->ht_cap.ampdu_density << |
827 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
5ef2d41a JB |
828 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
829 | pos += sizeof(sband->ht_cap.mcs); | |
830 | pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ | |
831 | } | |
832 | ||
de95a54b JB |
833 | /* |
834 | * If adding more here, adjust code in main.c | |
835 | * that calculates local->scan_ies_len. | |
836 | */ | |
837 | ||
8e664fb3 JB |
838 | /* add any remaining custom IEs */ |
839 | if (ie && ie_len) { | |
840 | noffset = ie_len; | |
841 | memcpy(pos, ie + offset, noffset - offset); | |
842 | pos += noffset - offset; | |
de95a54b JB |
843 | } |
844 | ||
845 | return pos - buffer; | |
846 | } | |
847 | ||
a619a4c0 | 848 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
85a237fe | 849 | u8 *dst, u32 ratemask, |
a619a4c0 | 850 | const u8 *ssid, size_t ssid_len, |
a806c558 PS |
851 | const u8 *ie, size_t ie_len, |
852 | bool directed) | |
46900298 JB |
853 | { |
854 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
855 | struct sk_buff *skb; |
856 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
857 | size_t buf_len; |
858 | u8 *buf; | |
651b5225 | 859 | u8 chan; |
7c12ce8b KV |
860 | |
861 | /* FIXME: come up with a proper value */ | |
862 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
d15b8459 | 863 | if (!buf) |
a619a4c0 | 864 | return NULL; |
46900298 | 865 | |
a806c558 PS |
866 | /* |
867 | * Do not send DS Channel parameter for directed probe requests | |
868 | * in order to maximize the chance that we get a response. Some | |
869 | * badly-behaved APs don't respond when this parameter is included. | |
870 | */ | |
871 | if (directed) | |
872 | chan = 0; | |
873 | else | |
874 | chan = ieee80211_frequency_to_channel( | |
875 | local->hw.conf.channel->center_freq); | |
651b5225 | 876 | |
7c12ce8b | 877 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
8dcb2003 | 878 | local->hw.conf.channel->band, |
85a237fe | 879 | ratemask, chan); |
7c12ce8b KV |
880 | |
881 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
882 | ssid, ssid_len, | |
883 | buf, buf_len); | |
884 | ||
46900298 | 885 | if (dst) { |
7c12ce8b | 886 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
887 | memcpy(mgmt->da, dst, ETH_ALEN); |
888 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 889 | } |
46900298 | 890 | |
62ae67be | 891 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
145b6d1a | 892 | kfree(buf); |
a619a4c0 JO |
893 | |
894 | return skb; | |
895 | } | |
896 | ||
897 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
898 | const u8 *ssid, size_t ssid_len, | |
a806c558 | 899 | const u8 *ie, size_t ie_len, |
aad14ceb | 900 | u32 ratemask, bool directed, bool no_cck) |
a619a4c0 JO |
901 | { |
902 | struct sk_buff *skb; | |
903 | ||
85a237fe JB |
904 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, |
905 | ie, ie_len, directed); | |
aad14ceb RM |
906 | if (skb) { |
907 | if (no_cck) | |
908 | IEEE80211_SKB_CB(skb)->flags |= | |
909 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
a619a4c0 | 910 | ieee80211_tx_skb(sdata, skb); |
aad14ceb | 911 | } |
46900298 JB |
912 | } |
913 | ||
914 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
915 | struct ieee802_11_elems *elems, | |
916 | enum ieee80211_band band) | |
917 | { | |
918 | struct ieee80211_supported_band *sband; | |
919 | struct ieee80211_rate *bitrates; | |
920 | size_t num_rates; | |
921 | u32 supp_rates; | |
922 | int i, j; | |
923 | sband = local->hw.wiphy->bands[band]; | |
924 | ||
925 | if (!sband) { | |
926 | WARN_ON(1); | |
927 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
928 | } | |
929 | ||
930 | bitrates = sband->bitrates; | |
931 | num_rates = sband->n_bitrates; | |
932 | supp_rates = 0; | |
933 | for (i = 0; i < elems->supp_rates_len + | |
934 | elems->ext_supp_rates_len; i++) { | |
935 | u8 rate = 0; | |
936 | int own_rate; | |
937 | if (i < elems->supp_rates_len) | |
938 | rate = elems->supp_rates[i]; | |
939 | else if (elems->ext_supp_rates) | |
940 | rate = elems->ext_supp_rates | |
941 | [i - elems->supp_rates_len]; | |
942 | own_rate = 5 * (rate & 0x7f); | |
943 | for (j = 0; j < num_rates; j++) | |
944 | if (bitrates[j].bitrate == own_rate) | |
945 | supp_rates |= BIT(j); | |
946 | } | |
947 | return supp_rates; | |
948 | } | |
f2753ddb | 949 | |
84f6a01c JB |
950 | void ieee80211_stop_device(struct ieee80211_local *local) |
951 | { | |
952 | ieee80211_led_radio(local, false); | |
67408c8c | 953 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
84f6a01c JB |
954 | |
955 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
956 | |
957 | flush_workqueue(local->workqueue); | |
678f415f | 958 | drv_stop(local); |
84f6a01c JB |
959 | } |
960 | ||
f2753ddb JB |
961 | int ieee80211_reconfig(struct ieee80211_local *local) |
962 | { | |
963 | struct ieee80211_hw *hw = &local->hw; | |
964 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 965 | struct sta_info *sta; |
2683d65b | 966 | int res, i; |
5bb644a0 | 967 | |
eecc4800 | 968 | #ifdef CONFIG_PM |
ceb99fe0 JB |
969 | if (local->suspended) |
970 | local->resuming = true; | |
f2753ddb | 971 | |
eecc4800 JB |
972 | if (local->wowlan) { |
973 | local->wowlan = false; | |
974 | res = drv_resume(local); | |
975 | if (res < 0) { | |
976 | local->resuming = false; | |
977 | return res; | |
978 | } | |
979 | if (res == 0) | |
980 | goto wake_up; | |
981 | WARN_ON(res > 1); | |
982 | /* | |
983 | * res is 1, which means the driver requested | |
984 | * to go through a regular reset on wakeup. | |
985 | */ | |
986 | } | |
987 | #endif | |
988 | ||
94f9b97b JB |
989 | /* setup fragmentation threshold */ |
990 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
991 | ||
992 | /* setup RTS threshold */ | |
993 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
994 | ||
995 | /* reset coverage class */ | |
996 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
997 | ||
998 | /* everything else happens only if HW was up & running */ | |
999 | if (!local->open_count) | |
1000 | goto wake_up; | |
f2753ddb | 1001 | |
94f9b97b JB |
1002 | /* |
1003 | * Upon resume hardware can sometimes be goofy due to | |
1004 | * various platform / driver / bus issues, so restarting | |
1005 | * the device may at times not work immediately. Propagate | |
1006 | * the error. | |
1007 | */ | |
1008 | res = drv_start(local); | |
1009 | if (res) { | |
1010 | WARN(local->suspended, "Hardware became unavailable " | |
1011 | "upon resume. This could be a software issue " | |
1012 | "prior to suspend or a hardware issue.\n"); | |
1013 | return res; | |
f2753ddb JB |
1014 | } |
1015 | ||
94f9b97b JB |
1016 | ieee80211_led_radio(local, true); |
1017 | ieee80211_mod_tpt_led_trig(local, | |
1018 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1019 | ||
f2753ddb JB |
1020 | /* add interfaces */ |
1021 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1022 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1023 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f JB |
1024 | ieee80211_sdata_running(sdata)) |
1025 | res = drv_add_interface(local, &sdata->vif); | |
f2753ddb JB |
1026 | } |
1027 | ||
1028 | /* add STAs back */ | |
34e89507 JB |
1029 | mutex_lock(&local->sta_mtx); |
1030 | list_for_each_entry(sta, &local->sta_list, list) { | |
1031 | if (sta->uploaded) { | |
5bb644a0 | 1032 | sdata = sta->sdata; |
f2753ddb JB |
1033 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1034 | sdata = container_of(sdata->bss, | |
1035 | struct ieee80211_sub_if_data, | |
1036 | u.ap); | |
1037 | ||
f785d83a | 1038 | memset(&sta->sta.drv_priv, 0, hw->sta_data_size); |
34e89507 | 1039 | WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
f2753ddb | 1040 | } |
f2753ddb | 1041 | } |
34e89507 | 1042 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1043 | |
2683d65b | 1044 | /* reconfigure tx conf */ |
f6f3def3 EP |
1045 | list_for_each_entry(sdata, &local->interfaces, list) { |
1046 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1047 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1048 | !ieee80211_sdata_running(sdata)) | |
1049 | continue; | |
1050 | ||
1051 | for (i = 0; i < hw->queues; i++) | |
1052 | drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]); | |
1053 | } | |
2683d65b | 1054 | |
f2753ddb JB |
1055 | /* reconfigure hardware */ |
1056 | ieee80211_hw_config(local, ~0); | |
1057 | ||
f2753ddb | 1058 | ieee80211_configure_filter(local); |
f2753ddb JB |
1059 | |
1060 | /* Finally also reconfigure all the BSS information */ | |
1061 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1062 | u32 changed; |
1063 | ||
9607e6b6 | 1064 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1065 | continue; |
ac8dd506 JB |
1066 | |
1067 | /* common change flags for all interface types */ | |
1068 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1069 | BSS_CHANGED_ERP_PREAMBLE | | |
1070 | BSS_CHANGED_ERP_SLOT | | |
1071 | BSS_CHANGED_HT | | |
1072 | BSS_CHANGED_BASIC_RATES | | |
1073 | BSS_CHANGED_BEACON_INT | | |
1074 | BSS_CHANGED_BSSID | | |
4ced3f74 JB |
1075 | BSS_CHANGED_CQM | |
1076 | BSS_CHANGED_QOS; | |
ac8dd506 | 1077 | |
f2753ddb JB |
1078 | switch (sdata->vif.type) { |
1079 | case NL80211_IFTYPE_STATION: | |
ac8dd506 | 1080 | changed |= BSS_CHANGED_ASSOC; |
a7b545f7 | 1081 | mutex_lock(&sdata->u.mgd.mtx); |
ac8dd506 | 1082 | ieee80211_bss_info_change_notify(sdata, changed); |
a7b545f7 | 1083 | mutex_unlock(&sdata->u.mgd.mtx); |
ac8dd506 | 1084 | break; |
f2753ddb | 1085 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1086 | changed |= BSS_CHANGED_IBSS; |
1087 | /* fall through */ | |
f2753ddb | 1088 | case NL80211_IFTYPE_AP: |
7827493b AN |
1089 | changed |= BSS_CHANGED_SSID; |
1090 | /* fall through */ | |
f2753ddb | 1091 | case NL80211_IFTYPE_MESH_POINT: |
ac8dd506 JB |
1092 | changed |= BSS_CHANGED_BEACON | |
1093 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1094 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1095 | break; |
1096 | case NL80211_IFTYPE_WDS: | |
1097 | break; | |
1098 | case NL80211_IFTYPE_AP_VLAN: | |
1099 | case NL80211_IFTYPE_MONITOR: | |
1100 | /* ignore virtual */ | |
1101 | break; | |
1102 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1103 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1104 | case NL80211_IFTYPE_P2P_CLIENT: |
1105 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1106 | WARN_ON(1); |
1107 | break; | |
1108 | } | |
1109 | } | |
1110 | ||
2a419056 JB |
1111 | /* |
1112 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1113 | * sessions can be established after a resume. | |
1114 | * | |
1115 | * Also tear down aggregation sessions since reconfiguring | |
1116 | * them in a hardware restart scenario is not easily done | |
1117 | * right now, and the hardware will have lost information | |
1118 | * about the sessions, but we and the AP still think they | |
1119 | * are active. This is really a workaround though. | |
1120 | */ | |
74e2bd1f | 1121 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1122 | mutex_lock(&local->sta_mtx); |
1123 | ||
1124 | list_for_each_entry(sta, &local->sta_list, list) { | |
53f73c09 | 1125 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
c2c98fde | 1126 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1127 | } |
2a419056 JB |
1128 | |
1129 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1130 | } |
74e2bd1f | 1131 | |
f2753ddb JB |
1132 | /* add back keys */ |
1133 | list_for_each_entry(sdata, &local->interfaces, list) | |
9607e6b6 | 1134 | if (ieee80211_sdata_running(sdata)) |
f2753ddb JB |
1135 | ieee80211_enable_keys(sdata); |
1136 | ||
eecc4800 | 1137 | wake_up: |
f2753ddb JB |
1138 | ieee80211_wake_queues_by_reason(hw, |
1139 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1140 | ||
5bb644a0 JB |
1141 | /* |
1142 | * If this is for hw restart things are still running. | |
1143 | * We may want to change that later, however. | |
1144 | */ | |
ceb99fe0 | 1145 | if (!local->suspended) |
5bb644a0 JB |
1146 | return 0; |
1147 | ||
1148 | #ifdef CONFIG_PM | |
ceb99fe0 | 1149 | /* first set suspended false, then resuming */ |
5bb644a0 | 1150 | local->suspended = false; |
ceb99fe0 JB |
1151 | mb(); |
1152 | local->resuming = false; | |
5bb644a0 JB |
1153 | |
1154 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1155 | switch(sdata->vif.type) { | |
1156 | case NL80211_IFTYPE_STATION: | |
1157 | ieee80211_sta_restart(sdata); | |
1158 | break; | |
1159 | case NL80211_IFTYPE_ADHOC: | |
1160 | ieee80211_ibss_restart(sdata); | |
1161 | break; | |
1162 | case NL80211_IFTYPE_MESH_POINT: | |
1163 | ieee80211_mesh_restart(sdata); | |
1164 | break; | |
1165 | default: | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | ||
26d59535 | 1170 | mod_timer(&local->sta_cleanup, jiffies + 1); |
5bb644a0 | 1171 | |
34e89507 | 1172 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1173 | list_for_each_entry(sta, &local->sta_list, list) |
1174 | mesh_plink_restart(sta); | |
34e89507 | 1175 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1176 | #else |
1177 | WARN_ON(1); | |
1178 | #endif | |
f2753ddb JB |
1179 | return 0; |
1180 | } | |
42935eca | 1181 | |
95acac61 JB |
1182 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
1183 | { | |
1184 | struct ieee80211_sub_if_data *sdata; | |
1185 | struct ieee80211_local *local; | |
1186 | struct ieee80211_key *key; | |
1187 | ||
1188 | if (WARN_ON(!vif)) | |
1189 | return; | |
1190 | ||
1191 | sdata = vif_to_sdata(vif); | |
1192 | local = sdata->local; | |
1193 | ||
1194 | if (WARN_ON(!local->resuming)) | |
1195 | return; | |
1196 | ||
1197 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1198 | return; | |
1199 | ||
1200 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1201 | ||
1202 | mutex_lock(&local->key_mtx); | |
1203 | list_for_each_entry(key, &sdata->key_list, list) | |
1204 | key->flags |= KEY_FLAG_TAINTED; | |
1205 | mutex_unlock(&local->key_mtx); | |
1206 | } | |
1207 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1208 | ||
0f78231b JB |
1209 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1210 | enum ieee80211_smps_mode *smps_mode) | |
1211 | { | |
1212 | if (ifmgd->associated) { | |
1213 | *smps_mode = ifmgd->ap_smps; | |
1214 | ||
1215 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1216 | if (ifmgd->powersave) | |
1217 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1218 | else | |
1219 | *smps_mode = IEEE80211_SMPS_OFF; | |
1220 | } | |
1221 | ||
1222 | return 1; | |
1223 | } | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /* must hold iflist_mtx */ | |
025e6be2 | 1229 | void ieee80211_recalc_smps(struct ieee80211_local *local) |
0f78231b JB |
1230 | { |
1231 | struct ieee80211_sub_if_data *sdata; | |
1232 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1233 | int count = 0; | |
1234 | ||
46a5ebaf | 1235 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1236 | |
1237 | /* | |
1238 | * This function could be improved to handle multiple | |
1239 | * interfaces better, but right now it makes any | |
1240 | * non-station interfaces force SM PS to be turned | |
1241 | * off. If there are multiple station interfaces it | |
1242 | * could also use the best possible mode, e.g. if | |
1243 | * one is in static and the other in dynamic then | |
1244 | * dynamic is ok. | |
1245 | */ | |
1246 | ||
1247 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1248 | if (!ieee80211_sdata_running(sdata)) |
0f78231b JB |
1249 | continue; |
1250 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1251 | goto set; | |
025e6be2 JB |
1252 | |
1253 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
0f78231b JB |
1254 | |
1255 | if (count > 1) { | |
1256 | smps_mode = IEEE80211_SMPS_OFF; | |
1257 | break; | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | if (smps_mode == local->smps_mode) | |
1262 | return; | |
1263 | ||
1264 | set: | |
1265 | local->smps_mode = smps_mode; | |
1266 | /* changed flag is auto-detected for this */ | |
1267 | ieee80211_hw_config(local, 0); | |
1268 | } | |
8e664fb3 JB |
1269 | |
1270 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1271 | { | |
1272 | int i; | |
1273 | ||
1274 | for (i = 0; i < n_ids; i++) | |
1275 | if (ids[i] == id) | |
1276 | return true; | |
1277 | return false; | |
1278 | } | |
1279 | ||
1280 | /** | |
1281 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1282 | * | |
1283 | * @ies: the IE buffer | |
1284 | * @ielen: the length of the IE buffer | |
1285 | * @ids: an array with element IDs that are allowed before | |
1286 | * the split | |
1287 | * @n_ids: the size of the element ID array | |
1288 | * @offset: offset where to start splitting in the buffer | |
1289 | * | |
1290 | * This function splits an IE buffer by updating the @offset | |
1291 | * variable to point to the location where the buffer should be | |
1292 | * split. | |
1293 | * | |
1294 | * It assumes that the given IE buffer is well-formed, this | |
1295 | * has to be guaranteed by the caller! | |
1296 | * | |
1297 | * It also assumes that the IEs in the buffer are ordered | |
1298 | * correctly, if not the result of using this function will not | |
1299 | * be ordered correctly either, i.e. it does no reordering. | |
1300 | * | |
1301 | * The function returns the offset where the next part of the | |
1302 | * buffer starts, which may be @ielen if the entire (remainder) | |
1303 | * of the buffer should be used. | |
1304 | */ | |
1305 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1306 | const u8 *ids, int n_ids, size_t offset) | |
1307 | { | |
1308 | size_t pos = offset; | |
1309 | ||
1310 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1311 | pos += 2 + ies[pos + 1]; | |
1312 | ||
1313 | return pos; | |
1314 | } | |
1315 | ||
1316 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1317 | { | |
1318 | size_t pos = offset; | |
1319 | ||
1320 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1321 | pos += 2 + ies[pos + 1]; | |
1322 | ||
1323 | return pos; | |
1324 | } | |
615f7b9b MV |
1325 | |
1326 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1327 | int rssi_min_thold, | |
1328 | int rssi_max_thold) | |
1329 | { | |
1330 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1331 | ||
1332 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1333 | return; | |
1334 | ||
1335 | /* | |
1336 | * Scale up threshold values before storing it, as the RSSI averaging | |
1337 | * algorithm uses a scaled up value as well. Change this scaling | |
1338 | * factor if the RSSI averaging algorithm changes. | |
1339 | */ | |
1340 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1341 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1342 | } | |
1343 | ||
1344 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1345 | int rssi_min_thold, | |
1346 | int rssi_max_thold) | |
1347 | { | |
1348 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1349 | ||
1350 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1351 | rssi_min_thold > rssi_max_thold); | |
1352 | ||
1353 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1354 | rssi_max_thold); | |
1355 | } | |
1356 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1357 | ||
1358 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1359 | { | |
1360 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1361 | ||
1362 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1363 | } | |
1364 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); | |
768db343 AN |
1365 | |
1366 | int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) | |
1367 | { | |
1368 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1369 | struct ieee80211_local *local = sdata->local; | |
1370 | struct ieee80211_supported_band *sband; | |
1371 | int rate; | |
1372 | u8 i, rates, *pos; | |
1373 | ||
1374 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1375 | rates = sband->n_bitrates; | |
1376 | if (rates > 8) | |
1377 | rates = 8; | |
1378 | ||
1379 | if (skb_tailroom(skb) < rates + 2) | |
1380 | return -ENOMEM; | |
1381 | ||
1382 | pos = skb_put(skb, rates + 2); | |
1383 | *pos++ = WLAN_EID_SUPP_RATES; | |
1384 | *pos++ = rates; | |
1385 | for (i = 0; i < rates; i++) { | |
1386 | rate = sband->bitrates[i].bitrate; | |
1387 | *pos++ = (u8) (rate / 5); | |
1388 | } | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) | |
1394 | { | |
1395 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1396 | struct ieee80211_local *local = sdata->local; | |
1397 | struct ieee80211_supported_band *sband; | |
1398 | int rate; | |
1399 | u8 i, exrates, *pos; | |
1400 | ||
1401 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1402 | exrates = sband->n_bitrates; | |
1403 | if (exrates > 8) | |
1404 | exrates -= 8; | |
1405 | else | |
1406 | exrates = 0; | |
1407 | ||
1408 | if (skb_tailroom(skb) < exrates + 2) | |
1409 | return -ENOMEM; | |
1410 | ||
1411 | if (exrates) { | |
1412 | pos = skb_put(skb, exrates + 2); | |
1413 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1414 | *pos++ = exrates; | |
1415 | for (i = 8; i < sband->n_bitrates; i++) { | |
1416 | rate = sband->bitrates[i].bitrate; | |
1417 | *pos++ = (u8) (rate / 5); | |
1418 | } | |
1419 | } | |
1420 | return 0; | |
1421 | } |