Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
59bbb6f7 JB |
2 | /* |
3 | * This file contains helper code to handle channel | |
4 | * settings and keeping track of what is possible at | |
5 | * any point in time. | |
6 | * | |
7 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
2740f0cf | 8 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
925b5978 | 9 | * Copyright 2018 Intel Corporation |
59bbb6f7 JB |
10 | */ |
11 | ||
54858ee5 | 12 | #include <linux/export.h> |
59bbb6f7 JB |
13 | #include <net/cfg80211.h> |
14 | #include "core.h" | |
e35e4d28 | 15 | #include "rdev-ops.h" |
59bbb6f7 | 16 | |
2a38075c AAL |
17 | static bool cfg80211_valid_60g_freq(u32 freq) |
18 | { | |
19 | return freq >= 58320 && freq <= 70200; | |
20 | } | |
21 | ||
3d9d1d66 JB |
22 | void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, |
23 | struct ieee80211_channel *chan, | |
24 | enum nl80211_channel_type chan_type) | |
9236d838 | 25 | { |
3d9d1d66 JB |
26 | if (WARN_ON(!chan)) |
27 | return; | |
9236d838 | 28 | |
3d9d1d66 JB |
29 | chandef->chan = chan; |
30 | chandef->center_freq2 = 0; | |
2a38075c AAL |
31 | chandef->edmg.bw_config = 0; |
32 | chandef->edmg.channels = 0; | |
4ee3e063 | 33 | |
3d9d1d66 JB |
34 | switch (chan_type) { |
35 | case NL80211_CHAN_NO_HT: | |
36 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
37 | chandef->center_freq1 = chan->center_freq; | |
38 | break; | |
39 | case NL80211_CHAN_HT20: | |
40 | chandef->width = NL80211_CHAN_WIDTH_20; | |
41 | chandef->center_freq1 = chan->center_freq; | |
42 | break; | |
9236d838 | 43 | case NL80211_CHAN_HT40PLUS: |
3d9d1d66 JB |
44 | chandef->width = NL80211_CHAN_WIDTH_40; |
45 | chandef->center_freq1 = chan->center_freq + 10; | |
09a02fdb | 46 | break; |
9236d838 | 47 | case NL80211_CHAN_HT40MINUS: |
3d9d1d66 JB |
48 | chandef->width = NL80211_CHAN_WIDTH_40; |
49 | chandef->center_freq1 = chan->center_freq - 10; | |
09a02fdb | 50 | break; |
9236d838 | 51 | default: |
3d9d1d66 JB |
52 | WARN_ON(1); |
53 | } | |
54 | } | |
55 | EXPORT_SYMBOL(cfg80211_chandef_create); | |
56 | ||
2a38075c AAL |
57 | static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) |
58 | { | |
59 | int max_contiguous = 0; | |
60 | int num_of_enabled = 0; | |
61 | int contiguous = 0; | |
62 | int i; | |
63 | ||
64 | if (!chandef->edmg.channels || !chandef->edmg.bw_config) | |
65 | return false; | |
66 | ||
67 | if (!cfg80211_valid_60g_freq(chandef->chan->center_freq)) | |
68 | return false; | |
69 | ||
70 | for (i = 0; i < 6; i++) { | |
71 | if (chandef->edmg.channels & BIT(i)) { | |
72 | contiguous++; | |
73 | num_of_enabled++; | |
74 | } else { | |
75 | contiguous = 0; | |
76 | } | |
77 | ||
78 | max_contiguous = max(contiguous, max_contiguous); | |
79 | } | |
80 | /* basic verification of edmg configuration according to | |
81 | * IEEE P802.11ay/D4.0 section 9.4.2.251 | |
82 | */ | |
83 | /* check bw_config against contiguous edmg channels */ | |
84 | switch (chandef->edmg.bw_config) { | |
85 | case IEEE80211_EDMG_BW_CONFIG_4: | |
86 | case IEEE80211_EDMG_BW_CONFIG_8: | |
87 | case IEEE80211_EDMG_BW_CONFIG_12: | |
88 | if (max_contiguous < 1) | |
89 | return false; | |
90 | break; | |
91 | case IEEE80211_EDMG_BW_CONFIG_5: | |
92 | case IEEE80211_EDMG_BW_CONFIG_9: | |
93 | case IEEE80211_EDMG_BW_CONFIG_13: | |
94 | if (max_contiguous < 2) | |
95 | return false; | |
96 | break; | |
97 | case IEEE80211_EDMG_BW_CONFIG_6: | |
98 | case IEEE80211_EDMG_BW_CONFIG_10: | |
99 | case IEEE80211_EDMG_BW_CONFIG_14: | |
100 | if (max_contiguous < 3) | |
101 | return false; | |
102 | break; | |
103 | case IEEE80211_EDMG_BW_CONFIG_7: | |
104 | case IEEE80211_EDMG_BW_CONFIG_11: | |
105 | case IEEE80211_EDMG_BW_CONFIG_15: | |
106 | if (max_contiguous < 4) | |
107 | return false; | |
108 | break; | |
109 | ||
110 | default: | |
111 | return false; | |
112 | } | |
113 | ||
114 | /* check bw_config against aggregated (non contiguous) edmg channels */ | |
115 | switch (chandef->edmg.bw_config) { | |
116 | case IEEE80211_EDMG_BW_CONFIG_4: | |
117 | case IEEE80211_EDMG_BW_CONFIG_5: | |
118 | case IEEE80211_EDMG_BW_CONFIG_6: | |
119 | case IEEE80211_EDMG_BW_CONFIG_7: | |
120 | break; | |
121 | case IEEE80211_EDMG_BW_CONFIG_8: | |
122 | case IEEE80211_EDMG_BW_CONFIG_9: | |
123 | case IEEE80211_EDMG_BW_CONFIG_10: | |
124 | case IEEE80211_EDMG_BW_CONFIG_11: | |
125 | if (num_of_enabled < 2) | |
126 | return false; | |
127 | break; | |
128 | case IEEE80211_EDMG_BW_CONFIG_12: | |
129 | case IEEE80211_EDMG_BW_CONFIG_13: | |
130 | case IEEE80211_EDMG_BW_CONFIG_14: | |
131 | case IEEE80211_EDMG_BW_CONFIG_15: | |
132 | if (num_of_enabled < 4 || max_contiguous < 2) | |
133 | return false; | |
134 | break; | |
135 | default: | |
136 | return false; | |
137 | } | |
138 | ||
139 | return true; | |
140 | } | |
141 | ||
9f5e8f6e | 142 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 JB |
143 | { |
144 | u32 control_freq; | |
145 | ||
146 | if (!chandef->chan) | |
147 | return false; | |
148 | ||
149 | control_freq = chandef->chan->center_freq; | |
150 | ||
151 | switch (chandef->width) { | |
2f301ab2 SW |
152 | case NL80211_CHAN_WIDTH_5: |
153 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
154 | case NL80211_CHAN_WIDTH_20: |
155 | case NL80211_CHAN_WIDTH_20_NOHT: | |
156 | if (chandef->center_freq1 != control_freq) | |
157 | return false; | |
158 | if (chandef->center_freq2) | |
159 | return false; | |
160 | break; | |
161 | case NL80211_CHAN_WIDTH_40: | |
162 | if (chandef->center_freq1 != control_freq + 10 && | |
163 | chandef->center_freq1 != control_freq - 10) | |
164 | return false; | |
165 | if (chandef->center_freq2) | |
166 | return false; | |
167 | break; | |
168 | case NL80211_CHAN_WIDTH_80P80: | |
169 | if (chandef->center_freq1 != control_freq + 30 && | |
170 | chandef->center_freq1 != control_freq + 10 && | |
171 | chandef->center_freq1 != control_freq - 10 && | |
172 | chandef->center_freq1 != control_freq - 30) | |
173 | return false; | |
174 | if (!chandef->center_freq2) | |
175 | return false; | |
9cab3151 JB |
176 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
177 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
178 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
179 | return false; | |
3d9d1d66 JB |
180 | break; |
181 | case NL80211_CHAN_WIDTH_80: | |
182 | if (chandef->center_freq1 != control_freq + 30 && | |
183 | chandef->center_freq1 != control_freq + 10 && | |
184 | chandef->center_freq1 != control_freq - 10 && | |
185 | chandef->center_freq1 != control_freq - 30) | |
186 | return false; | |
187 | if (chandef->center_freq2) | |
188 | return false; | |
189 | break; | |
190 | case NL80211_CHAN_WIDTH_160: | |
191 | if (chandef->center_freq1 != control_freq + 70 && | |
192 | chandef->center_freq1 != control_freq + 50 && | |
193 | chandef->center_freq1 != control_freq + 30 && | |
194 | chandef->center_freq1 != control_freq + 10 && | |
195 | chandef->center_freq1 != control_freq - 10 && | |
196 | chandef->center_freq1 != control_freq - 30 && | |
197 | chandef->center_freq1 != control_freq - 50 && | |
198 | chandef->center_freq1 != control_freq - 70) | |
199 | return false; | |
200 | if (chandef->center_freq2) | |
201 | return false; | |
202 | break; | |
203 | default: | |
204 | return false; | |
205 | } | |
206 | ||
ec649fed MH |
207 | /* channel 14 is only for IEEE 802.11b */ |
208 | if (chandef->center_freq1 == 2484 && | |
209 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
210 | return false; | |
211 | ||
2a38075c AAL |
212 | if (cfg80211_chandef_is_edmg(chandef) && |
213 | !cfg80211_edmg_chandef_valid(chandef)) | |
214 | return false; | |
215 | ||
3d9d1d66 JB |
216 | return true; |
217 | } | |
9f5e8f6e | 218 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
219 | |
220 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
fc1f48ff | 221 | u32 *pri40, u32 *pri80) |
3d9d1d66 JB |
222 | { |
223 | int tmp; | |
224 | ||
225 | switch (c->width) { | |
226 | case NL80211_CHAN_WIDTH_40: | |
227 | *pri40 = c->center_freq1; | |
228 | *pri80 = 0; | |
229 | break; | |
230 | case NL80211_CHAN_WIDTH_80: | |
231 | case NL80211_CHAN_WIDTH_80P80: | |
232 | *pri80 = c->center_freq1; | |
233 | /* n_P20 */ | |
234 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
235 | /* n_P40 */ | |
236 | tmp /= 2; | |
237 | /* freq_P40 */ | |
238 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
239 | break; | |
240 | case NL80211_CHAN_WIDTH_160: | |
241 | /* n_P20 */ | |
242 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
243 | /* n_P40 */ | |
244 | tmp /= 2; | |
245 | /* freq_P40 */ | |
246 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
247 | /* n_P80 */ | |
248 | tmp /= 2; | |
249 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
250 | break; | |
251 | default: | |
252 | WARN_ON_ONCE(1); | |
253 | } | |
254 | } | |
255 | ||
04f39047 SW |
256 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) |
257 | { | |
258 | int width; | |
259 | ||
260 | switch (c->width) { | |
2f301ab2 SW |
261 | case NL80211_CHAN_WIDTH_5: |
262 | width = 5; | |
263 | break; | |
264 | case NL80211_CHAN_WIDTH_10: | |
265 | width = 10; | |
266 | break; | |
04f39047 SW |
267 | case NL80211_CHAN_WIDTH_20: |
268 | case NL80211_CHAN_WIDTH_20_NOHT: | |
269 | width = 20; | |
270 | break; | |
271 | case NL80211_CHAN_WIDTH_40: | |
272 | width = 40; | |
273 | break; | |
274 | case NL80211_CHAN_WIDTH_80P80: | |
275 | case NL80211_CHAN_WIDTH_80: | |
276 | width = 80; | |
277 | break; | |
278 | case NL80211_CHAN_WIDTH_160: | |
279 | width = 160; | |
280 | break; | |
281 | default: | |
282 | WARN_ON_ONCE(1); | |
283 | return -1; | |
284 | } | |
285 | return width; | |
286 | } | |
287 | ||
3d9d1d66 JB |
288 | const struct cfg80211_chan_def * |
289 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
290 | const struct cfg80211_chan_def *c2) | |
291 | { | |
292 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80; | |
293 | ||
294 | /* If they are identical, return */ | |
295 | if (cfg80211_chandef_identical(c1, c2)) | |
296 | return c1; | |
297 | ||
298 | /* otherwise, must have same control channel */ | |
299 | if (c1->chan != c2->chan) | |
300 | return NULL; | |
301 | ||
302 | /* | |
303 | * If they have the same width, but aren't identical, | |
304 | * then they can't be compatible. | |
305 | */ | |
306 | if (c1->width == c2->width) | |
307 | return NULL; | |
308 | ||
2f301ab2 SW |
309 | /* |
310 | * can't be compatible if one of them is 5 or 10 MHz, | |
311 | * but they don't have the same width. | |
312 | */ | |
313 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
314 | c1->width == NL80211_CHAN_WIDTH_10 || | |
315 | c2->width == NL80211_CHAN_WIDTH_5 || | |
316 | c2->width == NL80211_CHAN_WIDTH_10) | |
317 | return NULL; | |
318 | ||
3d9d1d66 JB |
319 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
320 | c1->width == NL80211_CHAN_WIDTH_20) | |
321 | return c2; | |
322 | ||
323 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
324 | c2->width == NL80211_CHAN_WIDTH_20) | |
325 | return c1; | |
326 | ||
327 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80); | |
328 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80); | |
329 | ||
330 | if (c1_pri40 != c2_pri40) | |
331 | return NULL; | |
332 | ||
333 | WARN_ON(!c1_pri80 && !c2_pri80); | |
334 | if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80) | |
335 | return NULL; | |
336 | ||
337 | if (c1->width > c2->width) | |
338 | return c1; | |
339 | return c2; | |
340 | } | |
341 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
342 | ||
04f39047 SW |
343 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
344 | u32 bandwidth, | |
345 | enum nl80211_dfs_state dfs_state) | |
346 | { | |
347 | struct ieee80211_channel *c; | |
348 | u32 freq; | |
349 | ||
350 | for (freq = center_freq - bandwidth/2 + 10; | |
351 | freq <= center_freq + bandwidth/2 - 10; | |
352 | freq += 20) { | |
353 | c = ieee80211_get_channel(wiphy, freq); | |
354 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
355 | continue; | |
356 | ||
357 | c->dfs_state = dfs_state; | |
358 | c->dfs_state_entered = jiffies; | |
359 | } | |
360 | } | |
361 | ||
362 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
363 | const struct cfg80211_chan_def *chandef, | |
364 | enum nl80211_dfs_state dfs_state) | |
365 | { | |
366 | int width; | |
367 | ||
368 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
369 | return; | |
370 | ||
371 | width = cfg80211_chandef_get_width(chandef); | |
372 | if (width < 0) | |
373 | return; | |
374 | ||
375 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
376 | width, dfs_state); | |
377 | ||
378 | if (!chandef->center_freq2) | |
379 | return; | |
380 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
381 | width, dfs_state); | |
382 | } | |
383 | ||
40d1ba63 JD |
384 | static u32 cfg80211_get_start_freq(u32 center_freq, |
385 | u32 bandwidth) | |
386 | { | |
387 | u32 start_freq; | |
388 | ||
389 | if (bandwidth <= 20) | |
390 | start_freq = center_freq; | |
391 | else | |
392 | start_freq = center_freq - bandwidth/2 + 10; | |
393 | ||
394 | return start_freq; | |
395 | } | |
396 | ||
397 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
398 | u32 bandwidth) | |
399 | { | |
400 | u32 end_freq; | |
401 | ||
402 | if (bandwidth <= 20) | |
403 | end_freq = center_freq; | |
404 | else | |
405 | end_freq = center_freq + bandwidth/2 - 10; | |
406 | ||
407 | return end_freq; | |
408 | } | |
409 | ||
04f39047 SW |
410 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
411 | u32 center_freq, | |
412 | u32 bandwidth) | |
413 | { | |
414 | struct ieee80211_channel *c; | |
2f301ab2 SW |
415 | u32 freq, start_freq, end_freq; |
416 | ||
40d1ba63 JD |
417 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
418 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 419 | |
2f301ab2 | 420 | for (freq = start_freq; freq <= end_freq; freq += 20) { |
04f39047 SW |
421 | c = ieee80211_get_channel(wiphy, freq); |
422 | if (!c) | |
423 | return -EINVAL; | |
424 | ||
425 | if (c->flags & IEEE80211_CHAN_RADAR) | |
426 | return 1; | |
427 | } | |
428 | return 0; | |
429 | } | |
430 | ||
431 | ||
432 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
433 | const struct cfg80211_chan_def *chandef, |
434 | enum nl80211_iftype iftype) | |
04f39047 SW |
435 | { |
436 | int width; | |
2beb6dab | 437 | int ret; |
04f39047 SW |
438 | |
439 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
440 | return -EINVAL; | |
441 | ||
2beb6dab LC |
442 | switch (iftype) { |
443 | case NL80211_IFTYPE_ADHOC: | |
444 | case NL80211_IFTYPE_AP: | |
445 | case NL80211_IFTYPE_P2P_GO: | |
446 | case NL80211_IFTYPE_MESH_POINT: | |
447 | width = cfg80211_chandef_get_width(chandef); | |
448 | if (width < 0) | |
449 | return -EINVAL; | |
04f39047 | 450 | |
2beb6dab LC |
451 | ret = cfg80211_get_chans_dfs_required(wiphy, |
452 | chandef->center_freq1, | |
453 | width); | |
454 | if (ret < 0) | |
455 | return ret; | |
456 | else if (ret > 0) | |
457 | return BIT(chandef->width); | |
04f39047 | 458 | |
2beb6dab LC |
459 | if (!chandef->center_freq2) |
460 | return 0; | |
461 | ||
462 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
463 | chandef->center_freq2, | |
464 | width); | |
465 | if (ret < 0) | |
466 | return ret; | |
467 | else if (ret > 0) | |
468 | return BIT(chandef->width); | |
04f39047 | 469 | |
2beb6dab LC |
470 | break; |
471 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 472 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
473 | case NL80211_IFTYPE_P2P_CLIENT: |
474 | case NL80211_IFTYPE_MONITOR: | |
475 | case NL80211_IFTYPE_AP_VLAN: | |
476 | case NL80211_IFTYPE_WDS: | |
477 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 478 | case NL80211_IFTYPE_NAN: |
2beb6dab | 479 | break; |
00ec75fc | 480 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
481 | case NUM_NL80211_IFTYPES: |
482 | WARN_ON(1); | |
483 | } | |
484 | ||
485 | return 0; | |
04f39047 | 486 | } |
774f0734 | 487 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 488 | |
fe7c3a1f JD |
489 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
490 | u32 center_freq, | |
491 | u32 bandwidth) | |
492 | { | |
493 | struct ieee80211_channel *c; | |
494 | u32 freq, start_freq, end_freq; | |
495 | int count = 0; | |
496 | ||
497 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
498 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
499 | ||
500 | /* | |
501 | * Check entire range of channels for the bandwidth. | |
502 | * Check all channels are DFS channels (DFS_USABLE or | |
503 | * DFS_AVAILABLE). Return number of usable channels | |
504 | * (require CAC). Allow DFS and non-DFS channel mix. | |
505 | */ | |
506 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
507 | c = ieee80211_get_channel(wiphy, freq); | |
508 | if (!c) | |
509 | return -EINVAL; | |
510 | ||
511 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
512 | return -EINVAL; | |
513 | ||
514 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
515 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
516 | return -EINVAL; | |
517 | ||
518 | if (c->dfs_state == NL80211_DFS_USABLE) | |
519 | count++; | |
520 | } | |
521 | } | |
522 | ||
523 | return count; | |
524 | } | |
525 | ||
526 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
527 | const struct cfg80211_chan_def *chandef) | |
528 | { | |
529 | int width; | |
530 | int r1, r2 = 0; | |
531 | ||
532 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
533 | return false; | |
534 | ||
535 | width = cfg80211_chandef_get_width(chandef); | |
536 | if (width < 0) | |
537 | return false; | |
538 | ||
539 | r1 = cfg80211_get_chans_dfs_usable(wiphy, chandef->center_freq1, | |
540 | width); | |
541 | ||
542 | if (r1 < 0) | |
543 | return false; | |
544 | ||
545 | switch (chandef->width) { | |
546 | case NL80211_CHAN_WIDTH_80P80: | |
547 | WARN_ON(!chandef->center_freq2); | |
548 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
549 | chandef->center_freq2, | |
550 | width); | |
551 | if (r2 < 0) | |
552 | return false; | |
553 | break; | |
554 | default: | |
555 | WARN_ON(chandef->center_freq2); | |
556 | break; | |
557 | } | |
558 | ||
559 | return (r1 + r2 > 0); | |
560 | } | |
561 | ||
b35a51c7 VT |
562 | /* |
563 | * Checks if center frequency of chan falls with in the bandwidth | |
564 | * range of chandef. | |
565 | */ | |
566 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
567 | struct ieee80211_channel *chan) | |
568 | { | |
569 | int width; | |
a67a4893 | 570 | u32 freq; |
b35a51c7 VT |
571 | |
572 | if (chandef->chan->center_freq == chan->center_freq) | |
573 | return true; | |
574 | ||
575 | width = cfg80211_chandef_get_width(chandef); | |
576 | if (width <= 20) | |
577 | return false; | |
578 | ||
b35a51c7 VT |
579 | for (freq = chandef->center_freq1 - width / 2 + 10; |
580 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
581 | if (chan->center_freq == freq) | |
582 | return true; | |
583 | } | |
584 | ||
585 | if (!chandef->center_freq2) | |
586 | return false; | |
587 | ||
588 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
589 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
590 | if (chan->center_freq == freq) | |
591 | return true; | |
592 | } | |
593 | ||
594 | return false; | |
595 | } | |
596 | ||
597 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
598 | { | |
599 | bool active = false; | |
600 | ||
601 | ASSERT_WDEV_LOCK(wdev); | |
602 | ||
603 | if (!wdev->chandef.chan) | |
604 | return false; | |
605 | ||
606 | switch (wdev->iftype) { | |
607 | case NL80211_IFTYPE_AP: | |
608 | case NL80211_IFTYPE_P2P_GO: | |
609 | active = wdev->beacon_interval != 0; | |
610 | break; | |
611 | case NL80211_IFTYPE_ADHOC: | |
612 | active = wdev->ssid_len != 0; | |
613 | break; | |
614 | case NL80211_IFTYPE_MESH_POINT: | |
615 | active = wdev->mesh_id_len != 0; | |
616 | break; | |
617 | case NL80211_IFTYPE_STATION: | |
618 | case NL80211_IFTYPE_OCB: | |
619 | case NL80211_IFTYPE_P2P_CLIENT: | |
620 | case NL80211_IFTYPE_MONITOR: | |
621 | case NL80211_IFTYPE_AP_VLAN: | |
622 | case NL80211_IFTYPE_WDS: | |
623 | case NL80211_IFTYPE_P2P_DEVICE: | |
624 | /* Can NAN type be considered as beaconing interface? */ | |
625 | case NL80211_IFTYPE_NAN: | |
626 | break; | |
627 | case NL80211_IFTYPE_UNSPECIFIED: | |
628 | case NUM_NL80211_IFTYPES: | |
629 | WARN_ON(1); | |
630 | } | |
631 | ||
632 | return active; | |
633 | } | |
634 | ||
89766727 VT |
635 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
636 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
637 | { |
638 | struct wireless_dev *wdev; | |
639 | ||
b35a51c7 VT |
640 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
641 | wdev_lock(wdev); | |
642 | if (!cfg80211_beaconing_iface_active(wdev)) { | |
643 | wdev_unlock(wdev); | |
644 | continue; | |
645 | } | |
646 | ||
647 | if (cfg80211_is_sub_chan(&wdev->chandef, chan)) { | |
648 | wdev_unlock(wdev); | |
649 | return true; | |
650 | } | |
651 | wdev_unlock(wdev); | |
652 | } | |
653 | ||
654 | return false; | |
655 | } | |
fe7c3a1f | 656 | |
89766727 VT |
657 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
658 | struct ieee80211_channel *chan) | |
659 | { | |
660 | struct cfg80211_registered_device *rdev; | |
661 | ||
662 | ASSERT_RTNL(); | |
663 | ||
664 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
665 | return false; | |
666 | ||
667 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
668 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
669 | continue; | |
670 | ||
671 | if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan)) | |
672 | return true; | |
673 | } | |
674 | ||
675 | return false; | |
676 | } | |
677 | ||
6bc54fbc JD |
678 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
679 | u32 center_freq, | |
680 | u32 bandwidth) | |
3d9d1d66 JB |
681 | { |
682 | struct ieee80211_channel *c; | |
2f301ab2 | 683 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
684 | bool dfs_offload; |
685 | ||
686 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
687 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 688 | |
40d1ba63 JD |
689 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
690 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 691 | |
6bc54fbc JD |
692 | /* |
693 | * Check entire range of channels for the bandwidth. | |
694 | * If any channel in between is disabled or has not | |
695 | * had gone through CAC return false | |
696 | */ | |
2f301ab2 | 697 | for (freq = start_freq; freq <= end_freq; freq += 20) { |
3d9d1d66 | 698 | c = ieee80211_get_channel(wiphy, freq); |
04f39047 SW |
699 | if (!c) |
700 | return false; | |
701 | ||
6bc54fbc JD |
702 | if (c->flags & IEEE80211_CHAN_DISABLED) |
703 | return false; | |
704 | ||
2c390e44 DL |
705 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
706 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
707 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 708 | return false; |
6bc54fbc JD |
709 | } |
710 | ||
711 | return true; | |
712 | } | |
713 | ||
714 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
715 | const struct cfg80211_chan_def *chandef) | |
716 | { | |
717 | int width; | |
718 | int r; | |
719 | ||
720 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
721 | return false; | |
722 | ||
723 | width = cfg80211_chandef_get_width(chandef); | |
724 | if (width < 0) | |
725 | return false; | |
726 | ||
727 | r = cfg80211_get_chans_dfs_available(wiphy, chandef->center_freq1, | |
728 | width); | |
729 | ||
730 | /* If any of channels unavailable for cf1 just return */ | |
731 | if (!r) | |
732 | return r; | |
733 | ||
734 | switch (chandef->width) { | |
735 | case NL80211_CHAN_WIDTH_80P80: | |
736 | WARN_ON(!chandef->center_freq2); | |
737 | r = cfg80211_get_chans_dfs_available(wiphy, | |
738 | chandef->center_freq2, | |
739 | width); | |
680682d4 | 740 | break; |
6bc54fbc JD |
741 | default: |
742 | WARN_ON(chandef->center_freq2); | |
743 | break; | |
744 | } | |
745 | ||
746 | return r; | |
747 | } | |
748 | ||
31559f35 JD |
749 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
750 | u32 center_freq, | |
751 | u32 bandwidth) | |
752 | { | |
753 | struct ieee80211_channel *c; | |
754 | u32 start_freq, end_freq, freq; | |
755 | unsigned int dfs_cac_ms = 0; | |
756 | ||
757 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
758 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
759 | ||
760 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
761 | c = ieee80211_get_channel(wiphy, freq); | |
762 | if (!c) | |
763 | return 0; | |
764 | ||
765 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
766 | return 0; | |
767 | ||
768 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
769 | continue; | |
770 | ||
771 | if (c->dfs_cac_ms > dfs_cac_ms) | |
772 | dfs_cac_ms = c->dfs_cac_ms; | |
773 | } | |
774 | ||
775 | return dfs_cac_ms; | |
776 | } | |
777 | ||
778 | unsigned int | |
779 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
780 | const struct cfg80211_chan_def *chandef) | |
781 | { | |
782 | int width; | |
783 | unsigned int t1 = 0, t2 = 0; | |
784 | ||
785 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
786 | return 0; | |
787 | ||
788 | width = cfg80211_chandef_get_width(chandef); | |
789 | if (width < 0) | |
790 | return 0; | |
791 | ||
792 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
793 | chandef->center_freq1, | |
794 | width); | |
795 | ||
796 | if (!chandef->center_freq2) | |
797 | return t1; | |
798 | ||
799 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
800 | chandef->center_freq2, | |
801 | width); | |
802 | ||
803 | return max(t1, t2); | |
804 | } | |
6bc54fbc JD |
805 | |
806 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
807 | u32 center_freq, u32 bandwidth, | |
808 | u32 prohibited_flags) | |
809 | { | |
810 | struct ieee80211_channel *c; | |
811 | u32 freq, start_freq, end_freq; | |
04f39047 | 812 | |
6bc54fbc JD |
813 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
814 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
815 | ||
816 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
817 | c = ieee80211_get_channel(wiphy, freq); | |
818 | if (!c || c->flags & prohibited_flags) | |
3d9d1d66 | 819 | return false; |
9236d838 LR |
820 | } |
821 | ||
3d9d1d66 JB |
822 | return true; |
823 | } | |
824 | ||
2a38075c AAL |
825 | /* check if the operating channels are valid and supported */ |
826 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
827 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
828 | int primary_channel, | |
829 | struct ieee80211_edmg *edmg_cap) | |
830 | { | |
831 | struct ieee80211_channel *chan; | |
832 | int i, freq; | |
833 | int channels_counter = 0; | |
834 | ||
835 | if (!edmg_channels && !edmg_bw_config) | |
836 | return true; | |
837 | ||
838 | if ((!edmg_channels && edmg_bw_config) || | |
839 | (edmg_channels && !edmg_bw_config)) | |
840 | return false; | |
841 | ||
842 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
843 | return false; | |
844 | ||
845 | /* 60GHz channels 1..6 */ | |
846 | for (i = 0; i < 6; i++) { | |
847 | if (!(edmg_channels & BIT(i))) | |
848 | continue; | |
849 | ||
850 | if (!(edmg_cap->channels & BIT(i))) | |
851 | return false; | |
852 | ||
853 | channels_counter++; | |
854 | ||
855 | freq = ieee80211_channel_to_frequency(i + 1, | |
856 | NL80211_BAND_60GHZ); | |
857 | chan = ieee80211_get_channel(wiphy, freq); | |
858 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
859 | return false; | |
860 | } | |
861 | ||
862 | /* IEEE802.11 allows max 4 channels */ | |
863 | if (channels_counter > 4) | |
864 | return false; | |
865 | ||
866 | /* check bw_config is a subset of what driver supports | |
867 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
868 | */ | |
869 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
870 | return false; | |
871 | ||
872 | if (edmg_bw_config > edmg_cap->bw_config) | |
873 | return false; | |
874 | ||
875 | return true; | |
876 | } | |
877 | ||
9f5e8f6e JB |
878 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
879 | const struct cfg80211_chan_def *chandef, | |
880 | u32 prohibited_flags) | |
3d9d1d66 | 881 | { |
9f5e8f6e JB |
882 | struct ieee80211_sta_ht_cap *ht_cap; |
883 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 884 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 885 | u32 width, control_freq, cap; |
3d9d1d66 | 886 | |
9f5e8f6e JB |
887 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
888 | return false; | |
3d9d1d66 | 889 | |
9f5e8f6e JB |
890 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
891 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c AAL |
892 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
893 | ||
894 | if (edmg_cap->channels && | |
895 | !cfg80211_edmg_usable(wiphy, | |
896 | chandef->edmg.channels, | |
897 | chandef->edmg.bw_config, | |
898 | chandef->chan->hw_value, | |
899 | edmg_cap)) | |
900 | return false; | |
3d9d1d66 | 901 | |
9f5e8f6e | 902 | control_freq = chandef->chan->center_freq; |
9236d838 | 903 | |
3d9d1d66 | 904 | switch (chandef->width) { |
2f301ab2 SW |
905 | case NL80211_CHAN_WIDTH_5: |
906 | width = 5; | |
907 | break; | |
908 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 909 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
910 | width = 10; |
911 | break; | |
3d9d1d66 | 912 | case NL80211_CHAN_WIDTH_20: |
9f5e8f6e JB |
913 | if (!ht_cap->ht_supported) |
914 | return false; | |
925b5978 | 915 | /* fall through */ |
9f5e8f6e | 916 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 917 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
918 | width = 20; |
919 | break; | |
920 | case NL80211_CHAN_WIDTH_40: | |
921 | width = 40; | |
9f5e8f6e JB |
922 | if (!ht_cap->ht_supported) |
923 | return false; | |
924 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
925 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
926 | return false; | |
927 | if (chandef->center_freq1 < control_freq && | |
928 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
929 | return false; | |
930 | if (chandef->center_freq1 > control_freq && | |
931 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
932 | return false; | |
3d9d1d66 | 933 | break; |
3d9d1d66 | 934 | case NL80211_CHAN_WIDTH_80P80: |
08f6f147 JM |
935 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
936 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e | 937 | return false; |
925b5978 | 938 | /* fall through */ |
9f5e8f6e JB |
939 | case NL80211_CHAN_WIDTH_80: |
940 | if (!vht_cap->vht_supported) | |
941 | return false; | |
c7a6ee27 | 942 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 JB |
943 | width = 80; |
944 | break; | |
945 | case NL80211_CHAN_WIDTH_160: | |
9f5e8f6e JB |
946 | if (!vht_cap->vht_supported) |
947 | return false; | |
08f6f147 JM |
948 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
949 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
950 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e | 951 | return false; |
c7a6ee27 | 952 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
3d9d1d66 JB |
953 | width = 160; |
954 | break; | |
955 | default: | |
956 | WARN_ON_ONCE(1); | |
9236d838 | 957 | return false; |
4ee3e063 | 958 | } |
3d9d1d66 | 959 | |
c7a6ee27 JB |
960 | /* |
961 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
962 | * allowed by the driver, or only certain combinations? | |
963 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
964 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
965 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
966 | * no way to cover 80+80 MHz or more complex restrictions. | |
967 | * Note that such restrictions also need to be advertised to | |
968 | * userspace, for example for P2P channel selection. | |
969 | */ | |
9f5e8f6e | 970 | |
a6662dba JB |
971 | if (width > 20) |
972 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
973 | ||
2f301ab2 SW |
974 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
975 | if (width < 20) | |
976 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
977 | ||
978 | ||
9f5e8f6e JB |
979 | if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1, |
980 | width, prohibited_flags)) | |
981 | return false; | |
982 | ||
983 | if (!chandef->center_freq2) | |
984 | return true; | |
985 | return cfg80211_secondary_chans_ok(wiphy, chandef->center_freq2, | |
986 | width, prohibited_flags); | |
987 | } | |
988 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
989 | ||
174e0cd2 | 990 | /* |
06f207fc AN |
991 | * Check if the channel can be used under permissive conditions mandated by |
992 | * some regulatory bodies, i.e., the channel is marked with | |
993 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
994 | * associated to an AP on the same channel or on the same UNII band |
995 | * (assuming that the AP is an authorized master). | |
06f207fc | 996 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 997 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 998 | */ |
06f207fc AN |
999 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1000 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1001 | struct ieee80211_channel *chan) |
1002 | { | |
be69c24a | 1003 | struct wireless_dev *wdev; |
06f207fc | 1004 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 IP |
1005 | |
1006 | ASSERT_RTNL(); | |
1007 | ||
97f2645f | 1008 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1009 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1010 | return false; | |
1011 | ||
06f207fc AN |
1012 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1013 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1014 | iftype != NL80211_IFTYPE_STATION && | |
1015 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1016 | return false; | |
1017 | ||
c8866e55 IP |
1018 | if (regulatory_indoor_allowed() && |
1019 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1020 | return true; | |
1021 | ||
06f207fc | 1022 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1023 | return false; |
1024 | ||
1025 | /* | |
1026 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1027 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1028 | * enforce the relaxation (by doing a similar verifications as this), |
1029 | * and thus fail the GO instantiation, consider only the interfaces of | |
1030 | * the current registered device. | |
1031 | */ | |
53873f13 | 1032 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
174e0cd2 IP |
1033 | struct ieee80211_channel *other_chan = NULL; |
1034 | int r1, r2; | |
1035 | ||
be69c24a AS |
1036 | wdev_lock(wdev); |
1037 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1038 | wdev->current_bss) | |
1039 | other_chan = wdev->current_bss->pub.channel; | |
1040 | ||
1041 | /* | |
1042 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1043 | * this one (maybe the same one) can beacon as well. We allow | |
1044 | * the operation even if the station we relied on with | |
1045 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1046 | * we're not outdoor on an indoor-only channel. | |
1047 | */ | |
06f207fc AN |
1048 | if (iftype == NL80211_IFTYPE_P2P_GO && |
1049 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
be69c24a AS |
1050 | wdev->beacon_interval && |
1051 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1052 | other_chan = wdev->chandef.chan; | |
1053 | wdev_unlock(wdev); | |
174e0cd2 IP |
1054 | |
1055 | if (!other_chan) | |
1056 | continue; | |
1057 | ||
1058 | if (chan == other_chan) | |
1059 | return true; | |
1060 | ||
0816e6b1 AS |
1061 | if (chan->band != NL80211_BAND_5GHZ && |
1062 | chan->band != NL80211_BAND_6GHZ) | |
174e0cd2 IP |
1063 | continue; |
1064 | ||
1065 | r1 = cfg80211_get_unii(chan->center_freq); | |
1066 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1067 | ||
46d53724 IP |
1068 | if (r1 != -EINVAL && r1 == r2) { |
1069 | /* | |
1070 | * At some locations channels 149-165 are considered a | |
1071 | * bundle, but at other locations, e.g., Indonesia, | |
1072 | * channels 149-161 are considered a bundle while | |
1073 | * channel 165 is left out and considered to be in a | |
1074 | * different bundle. Thus, in case that there is a | |
1075 | * station interface connected to an AP on channel 165, | |
1076 | * it is assumed that channels 149-161 are allowed for | |
1077 | * GO operations. However, having a station interface | |
1078 | * connected to an AP on channels 149-161, does not | |
1079 | * allow GO operation on channel 165. | |
1080 | */ | |
1081 | if (chan->center_freq == 5825 && | |
1082 | other_chan->center_freq != 5825) | |
1083 | continue; | |
174e0cd2 | 1084 | return true; |
46d53724 | 1085 | } |
174e0cd2 IP |
1086 | } |
1087 | ||
1088 | return false; | |
1089 | } | |
1090 | ||
923b352f AN |
1091 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1092 | struct cfg80211_chan_def *chandef, | |
1093 | enum nl80211_iftype iftype, | |
1094 | bool check_no_ir) | |
9f5e8f6e JB |
1095 | { |
1096 | bool res; | |
6bc54fbc | 1097 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED | |
6bc54fbc | 1098 | IEEE80211_CHAN_RADAR; |
9f5e8f6e | 1099 | |
923b352f | 1100 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1101 | |
923b352f | 1102 | if (check_no_ir) |
174e0cd2 | 1103 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1104 | |
00ec75fc | 1105 | if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && |
6bc54fbc JD |
1106 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1107 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1108 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1109 | } | |
1110 | ||
1111 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1112 | |
1113 | trace_cfg80211_return_bool(res); | |
1114 | return res; | |
9236d838 | 1115 | } |
923b352f AN |
1116 | |
1117 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1118 | struct cfg80211_chan_def *chandef, | |
1119 | enum nl80211_iftype iftype) | |
1120 | { | |
1121 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1122 | } | |
683b6d3b | 1123 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1124 | |
923b352f AN |
1125 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1126 | struct cfg80211_chan_def *chandef, | |
1127 | enum nl80211_iftype iftype) | |
1128 | { | |
1129 | bool check_no_ir; | |
1130 | ||
1131 | ASSERT_RTNL(); | |
1132 | ||
1133 | /* | |
1134 | * Under certain conditions suggested by some regulatory bodies a | |
1135 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1136 | * only if such relaxations are not enabled and the conditions are not | |
1137 | * met. | |
1138 | */ | |
1139 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1140 | chandef->chan); | |
1141 | ||
1142 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1143 | } | |
1144 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1145 | ||
e8c9bd5b | 1146 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1147 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1148 | { |
e8c9bd5b | 1149 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1150 | return -EOPNOTSUPP; |
4f03c1ed MK |
1151 | if (!cfg80211_has_monitors_only(rdev)) |
1152 | return -EBUSY; | |
9588bbd5 | 1153 | |
683b6d3b | 1154 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1155 | } |
26ab9a0c MK |
1156 | |
1157 | void | |
8e95ea49 | 1158 | cfg80211_get_chan_state(struct wireless_dev *wdev, |
26ab9a0c | 1159 | struct ieee80211_channel **chan, |
9e0e2961 MK |
1160 | enum cfg80211_chan_mode *chanmode, |
1161 | u8 *radar_detect) | |
26ab9a0c | 1162 | { |
2beb6dab LC |
1163 | int ret; |
1164 | ||
26ab9a0c MK |
1165 | *chan = NULL; |
1166 | *chanmode = CHAN_MODE_UNDEFINED; | |
1167 | ||
26ab9a0c MK |
1168 | ASSERT_WDEV_LOCK(wdev); |
1169 | ||
98104fde | 1170 | if (wdev->netdev && !netif_running(wdev->netdev)) |
26ab9a0c MK |
1171 | return; |
1172 | ||
1173 | switch (wdev->iftype) { | |
1174 | case NL80211_IFTYPE_ADHOC: | |
1175 | if (wdev->current_bss) { | |
1176 | *chan = wdev->current_bss->pub.channel; | |
5336fa88 SW |
1177 | *chanmode = (wdev->ibss_fixed && |
1178 | !wdev->ibss_dfs_possible) | |
26ab9a0c MK |
1179 | ? CHAN_MODE_SHARED |
1180 | : CHAN_MODE_EXCLUSIVE; | |
9e0e2961 MK |
1181 | |
1182 | /* consider worst-case - IBSS can try to return to the | |
1183 | * original user-specified channel as creator */ | |
1184 | if (wdev->ibss_dfs_possible) | |
1185 | *radar_detect |= BIT(wdev->chandef.width); | |
26ab9a0c MK |
1186 | return; |
1187 | } | |
0f0094b3 | 1188 | break; |
26ab9a0c MK |
1189 | case NL80211_IFTYPE_STATION: |
1190 | case NL80211_IFTYPE_P2P_CLIENT: | |
1191 | if (wdev->current_bss) { | |
1192 | *chan = wdev->current_bss->pub.channel; | |
1193 | *chanmode = CHAN_MODE_SHARED; | |
1194 | return; | |
1195 | } | |
1196 | break; | |
1197 | case NL80211_IFTYPE_AP: | |
1198 | case NL80211_IFTYPE_P2P_GO: | |
04f39047 | 1199 | if (wdev->cac_started) { |
9e0e2961 | 1200 | *chan = wdev->chandef.chan; |
04f39047 | 1201 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1202 | *radar_detect |= BIT(wdev->chandef.width); |
04f39047 | 1203 | } else if (wdev->beacon_interval) { |
9e0e2961 | 1204 | *chan = wdev->chandef.chan; |
f53594a0 | 1205 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1206 | |
2beb6dab LC |
1207 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1208 | &wdev->chandef, | |
1209 | wdev->iftype); | |
1210 | WARN_ON(ret < 0); | |
1211 | if (ret > 0) | |
9e0e2961 | 1212 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 FF |
1213 | } |
1214 | return; | |
26ab9a0c | 1215 | case NL80211_IFTYPE_MESH_POINT: |
f53594a0 | 1216 | if (wdev->mesh_id_len) { |
9e0e2961 | 1217 | *chan = wdev->chandef.chan; |
f53594a0 | 1218 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1219 | |
2beb6dab LC |
1220 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1221 | &wdev->chandef, | |
1222 | wdev->iftype); | |
1223 | WARN_ON(ret < 0); | |
1224 | if (ret > 0) | |
9e0e2961 | 1225 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 | 1226 | } |
26ab9a0c | 1227 | return; |
6e0bd6c3 RL |
1228 | case NL80211_IFTYPE_OCB: |
1229 | if (wdev->chandef.chan) { | |
1230 | *chan = wdev->chandef.chan; | |
1231 | *chanmode = CHAN_MODE_SHARED; | |
1232 | return; | |
1233 | } | |
1234 | break; | |
26ab9a0c MK |
1235 | case NL80211_IFTYPE_MONITOR: |
1236 | case NL80211_IFTYPE_AP_VLAN: | |
1237 | case NL80211_IFTYPE_WDS: | |
98104fde | 1238 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1239 | case NL80211_IFTYPE_NAN: |
e7aceef4 | 1240 | /* these interface types don't really have a channel */ |
98104fde | 1241 | return; |
26ab9a0c MK |
1242 | case NL80211_IFTYPE_UNSPECIFIED: |
1243 | case NUM_NL80211_IFTYPES: | |
1244 | WARN_ON(1); | |
1245 | } | |
26ab9a0c | 1246 | } |