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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 | 29 | chandef->chan = chan; |
934f4c7d | 30 | chandef->freq1_offset = chan->freq_offset; |
3d9d1d66 | 31 | chandef->center_freq2 = 0; |
2a38075c AAL |
32 | chandef->edmg.bw_config = 0; |
33 | chandef->edmg.channels = 0; | |
4ee3e063 | 34 | |
3d9d1d66 JB |
35 | switch (chan_type) { |
36 | case NL80211_CHAN_NO_HT: | |
37 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
38 | chandef->center_freq1 = chan->center_freq; | |
39 | break; | |
40 | case NL80211_CHAN_HT20: | |
41 | chandef->width = NL80211_CHAN_WIDTH_20; | |
42 | chandef->center_freq1 = chan->center_freq; | |
43 | break; | |
9236d838 | 44 | case NL80211_CHAN_HT40PLUS: |
3d9d1d66 JB |
45 | chandef->width = NL80211_CHAN_WIDTH_40; |
46 | chandef->center_freq1 = chan->center_freq + 10; | |
09a02fdb | 47 | break; |
9236d838 | 48 | case NL80211_CHAN_HT40MINUS: |
3d9d1d66 JB |
49 | chandef->width = NL80211_CHAN_WIDTH_40; |
50 | chandef->center_freq1 = chan->center_freq - 10; | |
09a02fdb | 51 | break; |
9236d838 | 52 | default: |
3d9d1d66 JB |
53 | WARN_ON(1); |
54 | } | |
55 | } | |
56 | EXPORT_SYMBOL(cfg80211_chandef_create); | |
57 | ||
2a38075c AAL |
58 | static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) |
59 | { | |
60 | int max_contiguous = 0; | |
61 | int num_of_enabled = 0; | |
62 | int contiguous = 0; | |
63 | int i; | |
64 | ||
65 | if (!chandef->edmg.channels || !chandef->edmg.bw_config) | |
66 | return false; | |
67 | ||
68 | if (!cfg80211_valid_60g_freq(chandef->chan->center_freq)) | |
69 | return false; | |
70 | ||
71 | for (i = 0; i < 6; i++) { | |
72 | if (chandef->edmg.channels & BIT(i)) { | |
73 | contiguous++; | |
74 | num_of_enabled++; | |
75 | } else { | |
76 | contiguous = 0; | |
77 | } | |
78 | ||
79 | max_contiguous = max(contiguous, max_contiguous); | |
80 | } | |
81 | /* basic verification of edmg configuration according to | |
82 | * IEEE P802.11ay/D4.0 section 9.4.2.251 | |
83 | */ | |
84 | /* check bw_config against contiguous edmg channels */ | |
85 | switch (chandef->edmg.bw_config) { | |
86 | case IEEE80211_EDMG_BW_CONFIG_4: | |
87 | case IEEE80211_EDMG_BW_CONFIG_8: | |
88 | case IEEE80211_EDMG_BW_CONFIG_12: | |
89 | if (max_contiguous < 1) | |
90 | return false; | |
91 | break; | |
92 | case IEEE80211_EDMG_BW_CONFIG_5: | |
93 | case IEEE80211_EDMG_BW_CONFIG_9: | |
94 | case IEEE80211_EDMG_BW_CONFIG_13: | |
95 | if (max_contiguous < 2) | |
96 | return false; | |
97 | break; | |
98 | case IEEE80211_EDMG_BW_CONFIG_6: | |
99 | case IEEE80211_EDMG_BW_CONFIG_10: | |
100 | case IEEE80211_EDMG_BW_CONFIG_14: | |
101 | if (max_contiguous < 3) | |
102 | return false; | |
103 | break; | |
104 | case IEEE80211_EDMG_BW_CONFIG_7: | |
105 | case IEEE80211_EDMG_BW_CONFIG_11: | |
106 | case IEEE80211_EDMG_BW_CONFIG_15: | |
107 | if (max_contiguous < 4) | |
108 | return false; | |
109 | break; | |
110 | ||
111 | default: | |
112 | return false; | |
113 | } | |
114 | ||
115 | /* check bw_config against aggregated (non contiguous) edmg channels */ | |
116 | switch (chandef->edmg.bw_config) { | |
117 | case IEEE80211_EDMG_BW_CONFIG_4: | |
118 | case IEEE80211_EDMG_BW_CONFIG_5: | |
119 | case IEEE80211_EDMG_BW_CONFIG_6: | |
120 | case IEEE80211_EDMG_BW_CONFIG_7: | |
121 | break; | |
122 | case IEEE80211_EDMG_BW_CONFIG_8: | |
123 | case IEEE80211_EDMG_BW_CONFIG_9: | |
124 | case IEEE80211_EDMG_BW_CONFIG_10: | |
125 | case IEEE80211_EDMG_BW_CONFIG_11: | |
126 | if (num_of_enabled < 2) | |
127 | return false; | |
128 | break; | |
129 | case IEEE80211_EDMG_BW_CONFIG_12: | |
130 | case IEEE80211_EDMG_BW_CONFIG_13: | |
131 | case IEEE80211_EDMG_BW_CONFIG_14: | |
132 | case IEEE80211_EDMG_BW_CONFIG_15: | |
133 | if (num_of_enabled < 4 || max_contiguous < 2) | |
134 | return false; | |
135 | break; | |
136 | default: | |
137 | return false; | |
138 | } | |
139 | ||
140 | return true; | |
141 | } | |
142 | ||
9f5e8f6e | 143 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 JB |
144 | { |
145 | u32 control_freq; | |
146 | ||
147 | if (!chandef->chan) | |
148 | return false; | |
149 | ||
150 | control_freq = chandef->chan->center_freq; | |
151 | ||
152 | switch (chandef->width) { | |
2f301ab2 SW |
153 | case NL80211_CHAN_WIDTH_5: |
154 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
155 | case NL80211_CHAN_WIDTH_20: |
156 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
157 | if (ieee80211_chandef_to_khz(chandef) != |
158 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
159 | return false; |
160 | if (chandef->center_freq2) | |
161 | return false; | |
162 | break; | |
163 | case NL80211_CHAN_WIDTH_40: | |
164 | if (chandef->center_freq1 != control_freq + 10 && | |
165 | chandef->center_freq1 != control_freq - 10) | |
166 | return false; | |
167 | if (chandef->center_freq2) | |
168 | return false; | |
169 | break; | |
170 | case NL80211_CHAN_WIDTH_80P80: | |
171 | if (chandef->center_freq1 != control_freq + 30 && | |
172 | chandef->center_freq1 != control_freq + 10 && | |
173 | chandef->center_freq1 != control_freq - 10 && | |
174 | chandef->center_freq1 != control_freq - 30) | |
175 | return false; | |
176 | if (!chandef->center_freq2) | |
177 | return false; | |
9cab3151 JB |
178 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
179 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
180 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
181 | return false; | |
3d9d1d66 JB |
182 | break; |
183 | case NL80211_CHAN_WIDTH_80: | |
184 | if (chandef->center_freq1 != control_freq + 30 && | |
185 | chandef->center_freq1 != control_freq + 10 && | |
186 | chandef->center_freq1 != control_freq - 10 && | |
187 | chandef->center_freq1 != control_freq - 30) | |
188 | return false; | |
189 | if (chandef->center_freq2) | |
190 | return false; | |
191 | break; | |
192 | case NL80211_CHAN_WIDTH_160: | |
193 | if (chandef->center_freq1 != control_freq + 70 && | |
194 | chandef->center_freq1 != control_freq + 50 && | |
195 | chandef->center_freq1 != control_freq + 30 && | |
196 | chandef->center_freq1 != control_freq + 10 && | |
197 | chandef->center_freq1 != control_freq - 10 && | |
198 | chandef->center_freq1 != control_freq - 30 && | |
199 | chandef->center_freq1 != control_freq - 50 && | |
200 | chandef->center_freq1 != control_freq - 70) | |
201 | return false; | |
202 | if (chandef->center_freq2) | |
203 | return false; | |
204 | break; | |
205 | default: | |
206 | return false; | |
207 | } | |
208 | ||
ec649fed MH |
209 | /* channel 14 is only for IEEE 802.11b */ |
210 | if (chandef->center_freq1 == 2484 && | |
211 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
212 | return false; | |
213 | ||
2a38075c AAL |
214 | if (cfg80211_chandef_is_edmg(chandef) && |
215 | !cfg80211_edmg_chandef_valid(chandef)) | |
216 | return false; | |
217 | ||
3d9d1d66 JB |
218 | return true; |
219 | } | |
9f5e8f6e | 220 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
221 | |
222 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
fc1f48ff | 223 | u32 *pri40, u32 *pri80) |
3d9d1d66 JB |
224 | { |
225 | int tmp; | |
226 | ||
227 | switch (c->width) { | |
228 | case NL80211_CHAN_WIDTH_40: | |
229 | *pri40 = c->center_freq1; | |
230 | *pri80 = 0; | |
231 | break; | |
232 | case NL80211_CHAN_WIDTH_80: | |
233 | case NL80211_CHAN_WIDTH_80P80: | |
234 | *pri80 = c->center_freq1; | |
235 | /* n_P20 */ | |
236 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
237 | /* n_P40 */ | |
238 | tmp /= 2; | |
239 | /* freq_P40 */ | |
240 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
241 | break; | |
242 | case NL80211_CHAN_WIDTH_160: | |
243 | /* n_P20 */ | |
244 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
245 | /* n_P40 */ | |
246 | tmp /= 2; | |
247 | /* freq_P40 */ | |
248 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
249 | /* n_P80 */ | |
250 | tmp /= 2; | |
251 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
252 | break; | |
253 | default: | |
254 | WARN_ON_ONCE(1); | |
255 | } | |
256 | } | |
257 | ||
04f39047 SW |
258 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) |
259 | { | |
260 | int width; | |
261 | ||
262 | switch (c->width) { | |
2f301ab2 SW |
263 | case NL80211_CHAN_WIDTH_5: |
264 | width = 5; | |
265 | break; | |
266 | case NL80211_CHAN_WIDTH_10: | |
267 | width = 10; | |
268 | break; | |
04f39047 SW |
269 | case NL80211_CHAN_WIDTH_20: |
270 | case NL80211_CHAN_WIDTH_20_NOHT: | |
271 | width = 20; | |
272 | break; | |
273 | case NL80211_CHAN_WIDTH_40: | |
274 | width = 40; | |
275 | break; | |
276 | case NL80211_CHAN_WIDTH_80P80: | |
277 | case NL80211_CHAN_WIDTH_80: | |
278 | width = 80; | |
279 | break; | |
280 | case NL80211_CHAN_WIDTH_160: | |
281 | width = 160; | |
282 | break; | |
283 | default: | |
284 | WARN_ON_ONCE(1); | |
285 | return -1; | |
286 | } | |
287 | return width; | |
288 | } | |
289 | ||
3d9d1d66 JB |
290 | const struct cfg80211_chan_def * |
291 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
292 | const struct cfg80211_chan_def *c2) | |
293 | { | |
294 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80; | |
295 | ||
296 | /* If they are identical, return */ | |
297 | if (cfg80211_chandef_identical(c1, c2)) | |
298 | return c1; | |
299 | ||
300 | /* otherwise, must have same control channel */ | |
301 | if (c1->chan != c2->chan) | |
302 | return NULL; | |
303 | ||
304 | /* | |
305 | * If they have the same width, but aren't identical, | |
306 | * then they can't be compatible. | |
307 | */ | |
308 | if (c1->width == c2->width) | |
309 | return NULL; | |
310 | ||
2f301ab2 SW |
311 | /* |
312 | * can't be compatible if one of them is 5 or 10 MHz, | |
313 | * but they don't have the same width. | |
314 | */ | |
315 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
316 | c1->width == NL80211_CHAN_WIDTH_10 || | |
317 | c2->width == NL80211_CHAN_WIDTH_5 || | |
318 | c2->width == NL80211_CHAN_WIDTH_10) | |
319 | return NULL; | |
320 | ||
3d9d1d66 JB |
321 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
322 | c1->width == NL80211_CHAN_WIDTH_20) | |
323 | return c2; | |
324 | ||
325 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
326 | c2->width == NL80211_CHAN_WIDTH_20) | |
327 | return c1; | |
328 | ||
329 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80); | |
330 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80); | |
331 | ||
332 | if (c1_pri40 != c2_pri40) | |
333 | return NULL; | |
334 | ||
335 | WARN_ON(!c1_pri80 && !c2_pri80); | |
336 | if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80) | |
337 | return NULL; | |
338 | ||
339 | if (c1->width > c2->width) | |
340 | return c1; | |
341 | return c2; | |
342 | } | |
343 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
344 | ||
04f39047 SW |
345 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
346 | u32 bandwidth, | |
347 | enum nl80211_dfs_state dfs_state) | |
348 | { | |
349 | struct ieee80211_channel *c; | |
350 | u32 freq; | |
351 | ||
352 | for (freq = center_freq - bandwidth/2 + 10; | |
353 | freq <= center_freq + bandwidth/2 - 10; | |
354 | freq += 20) { | |
355 | c = ieee80211_get_channel(wiphy, freq); | |
356 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
357 | continue; | |
358 | ||
359 | c->dfs_state = dfs_state; | |
360 | c->dfs_state_entered = jiffies; | |
361 | } | |
362 | } | |
363 | ||
364 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
365 | const struct cfg80211_chan_def *chandef, | |
366 | enum nl80211_dfs_state dfs_state) | |
367 | { | |
368 | int width; | |
369 | ||
370 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
371 | return; | |
372 | ||
373 | width = cfg80211_chandef_get_width(chandef); | |
374 | if (width < 0) | |
375 | return; | |
376 | ||
377 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
378 | width, dfs_state); | |
379 | ||
380 | if (!chandef->center_freq2) | |
381 | return; | |
382 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
383 | width, dfs_state); | |
384 | } | |
385 | ||
40d1ba63 JD |
386 | static u32 cfg80211_get_start_freq(u32 center_freq, |
387 | u32 bandwidth) | |
388 | { | |
389 | u32 start_freq; | |
390 | ||
934f4c7d TP |
391 | bandwidth = MHZ_TO_KHZ(bandwidth); |
392 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
393 | start_freq = center_freq; |
394 | else | |
934f4c7d | 395 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
396 | |
397 | return start_freq; | |
398 | } | |
399 | ||
400 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
401 | u32 bandwidth) | |
402 | { | |
403 | u32 end_freq; | |
404 | ||
934f4c7d TP |
405 | bandwidth = MHZ_TO_KHZ(bandwidth); |
406 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
407 | end_freq = center_freq; |
408 | else | |
934f4c7d | 409 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
410 | |
411 | return end_freq; | |
412 | } | |
413 | ||
04f39047 SW |
414 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
415 | u32 center_freq, | |
416 | u32 bandwidth) | |
417 | { | |
418 | struct ieee80211_channel *c; | |
2f301ab2 SW |
419 | u32 freq, start_freq, end_freq; |
420 | ||
40d1ba63 JD |
421 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
422 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 423 | |
934f4c7d TP |
424 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
425 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
426 | if (!c) |
427 | return -EINVAL; | |
428 | ||
429 | if (c->flags & IEEE80211_CHAN_RADAR) | |
430 | return 1; | |
431 | } | |
432 | return 0; | |
433 | } | |
434 | ||
435 | ||
436 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
437 | const struct cfg80211_chan_def *chandef, |
438 | enum nl80211_iftype iftype) | |
04f39047 SW |
439 | { |
440 | int width; | |
2beb6dab | 441 | int ret; |
04f39047 SW |
442 | |
443 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
444 | return -EINVAL; | |
445 | ||
2beb6dab LC |
446 | switch (iftype) { |
447 | case NL80211_IFTYPE_ADHOC: | |
448 | case NL80211_IFTYPE_AP: | |
449 | case NL80211_IFTYPE_P2P_GO: | |
450 | case NL80211_IFTYPE_MESH_POINT: | |
451 | width = cfg80211_chandef_get_width(chandef); | |
452 | if (width < 0) | |
453 | return -EINVAL; | |
04f39047 | 454 | |
2beb6dab | 455 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d TP |
456 | ieee80211_chandef_to_khz(chandef), |
457 | width); | |
2beb6dab LC |
458 | if (ret < 0) |
459 | return ret; | |
460 | else if (ret > 0) | |
461 | return BIT(chandef->width); | |
04f39047 | 462 | |
2beb6dab LC |
463 | if (!chandef->center_freq2) |
464 | return 0; | |
465 | ||
466 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d TP |
467 | MHZ_TO_KHZ(chandef->center_freq2), |
468 | width); | |
2beb6dab LC |
469 | if (ret < 0) |
470 | return ret; | |
471 | else if (ret > 0) | |
472 | return BIT(chandef->width); | |
04f39047 | 473 | |
2beb6dab LC |
474 | break; |
475 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 476 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
477 | case NL80211_IFTYPE_P2P_CLIENT: |
478 | case NL80211_IFTYPE_MONITOR: | |
479 | case NL80211_IFTYPE_AP_VLAN: | |
480 | case NL80211_IFTYPE_WDS: | |
481 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 482 | case NL80211_IFTYPE_NAN: |
2beb6dab | 483 | break; |
00ec75fc | 484 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
485 | case NUM_NL80211_IFTYPES: |
486 | WARN_ON(1); | |
487 | } | |
488 | ||
489 | return 0; | |
04f39047 | 490 | } |
774f0734 | 491 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 492 | |
fe7c3a1f JD |
493 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
494 | u32 center_freq, | |
495 | u32 bandwidth) | |
496 | { | |
497 | struct ieee80211_channel *c; | |
498 | u32 freq, start_freq, end_freq; | |
499 | int count = 0; | |
500 | ||
501 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
502 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
503 | ||
504 | /* | |
505 | * Check entire range of channels for the bandwidth. | |
506 | * Check all channels are DFS channels (DFS_USABLE or | |
507 | * DFS_AVAILABLE). Return number of usable channels | |
508 | * (require CAC). Allow DFS and non-DFS channel mix. | |
509 | */ | |
934f4c7d TP |
510 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
511 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
512 | if (!c) |
513 | return -EINVAL; | |
514 | ||
515 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
516 | return -EINVAL; | |
517 | ||
518 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
519 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
520 | return -EINVAL; | |
521 | ||
522 | if (c->dfs_state == NL80211_DFS_USABLE) | |
523 | count++; | |
524 | } | |
525 | } | |
526 | ||
527 | return count; | |
528 | } | |
529 | ||
530 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
531 | const struct cfg80211_chan_def *chandef) | |
532 | { | |
533 | int width; | |
534 | int r1, r2 = 0; | |
535 | ||
536 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
537 | return false; | |
538 | ||
539 | width = cfg80211_chandef_get_width(chandef); | |
540 | if (width < 0) | |
541 | return false; | |
542 | ||
934f4c7d TP |
543 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
544 | MHZ_TO_KHZ(chandef->center_freq1), | |
545 | width); | |
fe7c3a1f JD |
546 | |
547 | if (r1 < 0) | |
548 | return false; | |
549 | ||
550 | switch (chandef->width) { | |
551 | case NL80211_CHAN_WIDTH_80P80: | |
552 | WARN_ON(!chandef->center_freq2); | |
553 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
554 | MHZ_TO_KHZ(chandef->center_freq2), |
555 | width); | |
fe7c3a1f JD |
556 | if (r2 < 0) |
557 | return false; | |
558 | break; | |
559 | default: | |
560 | WARN_ON(chandef->center_freq2); | |
561 | break; | |
562 | } | |
563 | ||
564 | return (r1 + r2 > 0); | |
565 | } | |
566 | ||
b35a51c7 VT |
567 | /* |
568 | * Checks if center frequency of chan falls with in the bandwidth | |
569 | * range of chandef. | |
570 | */ | |
571 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
572 | struct ieee80211_channel *chan) | |
573 | { | |
574 | int width; | |
a67a4893 | 575 | u32 freq; |
b35a51c7 VT |
576 | |
577 | if (chandef->chan->center_freq == chan->center_freq) | |
578 | return true; | |
579 | ||
580 | width = cfg80211_chandef_get_width(chandef); | |
581 | if (width <= 20) | |
582 | return false; | |
583 | ||
b35a51c7 VT |
584 | for (freq = chandef->center_freq1 - width / 2 + 10; |
585 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
586 | if (chan->center_freq == freq) | |
587 | return true; | |
588 | } | |
589 | ||
590 | if (!chandef->center_freq2) | |
591 | return false; | |
592 | ||
593 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
594 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
595 | if (chan->center_freq == freq) | |
596 | return true; | |
597 | } | |
598 | ||
599 | return false; | |
600 | } | |
601 | ||
602 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
603 | { | |
604 | bool active = false; | |
605 | ||
606 | ASSERT_WDEV_LOCK(wdev); | |
607 | ||
608 | if (!wdev->chandef.chan) | |
609 | return false; | |
610 | ||
611 | switch (wdev->iftype) { | |
612 | case NL80211_IFTYPE_AP: | |
613 | case NL80211_IFTYPE_P2P_GO: | |
614 | active = wdev->beacon_interval != 0; | |
615 | break; | |
616 | case NL80211_IFTYPE_ADHOC: | |
617 | active = wdev->ssid_len != 0; | |
618 | break; | |
619 | case NL80211_IFTYPE_MESH_POINT: | |
620 | active = wdev->mesh_id_len != 0; | |
621 | break; | |
622 | case NL80211_IFTYPE_STATION: | |
623 | case NL80211_IFTYPE_OCB: | |
624 | case NL80211_IFTYPE_P2P_CLIENT: | |
625 | case NL80211_IFTYPE_MONITOR: | |
626 | case NL80211_IFTYPE_AP_VLAN: | |
627 | case NL80211_IFTYPE_WDS: | |
628 | case NL80211_IFTYPE_P2P_DEVICE: | |
629 | /* Can NAN type be considered as beaconing interface? */ | |
630 | case NL80211_IFTYPE_NAN: | |
631 | break; | |
632 | case NL80211_IFTYPE_UNSPECIFIED: | |
633 | case NUM_NL80211_IFTYPES: | |
634 | WARN_ON(1); | |
635 | } | |
636 | ||
637 | return active; | |
638 | } | |
639 | ||
89766727 VT |
640 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
641 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
642 | { |
643 | struct wireless_dev *wdev; | |
644 | ||
b35a51c7 VT |
645 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
646 | wdev_lock(wdev); | |
647 | if (!cfg80211_beaconing_iface_active(wdev)) { | |
648 | wdev_unlock(wdev); | |
649 | continue; | |
650 | } | |
651 | ||
652 | if (cfg80211_is_sub_chan(&wdev->chandef, chan)) { | |
653 | wdev_unlock(wdev); | |
654 | return true; | |
655 | } | |
656 | wdev_unlock(wdev); | |
657 | } | |
658 | ||
659 | return false; | |
660 | } | |
fe7c3a1f | 661 | |
89766727 VT |
662 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
663 | struct ieee80211_channel *chan) | |
664 | { | |
665 | struct cfg80211_registered_device *rdev; | |
666 | ||
667 | ASSERT_RTNL(); | |
668 | ||
669 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
670 | return false; | |
671 | ||
672 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
673 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
674 | continue; | |
675 | ||
676 | if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan)) | |
677 | return true; | |
678 | } | |
679 | ||
680 | return false; | |
681 | } | |
682 | ||
6bc54fbc JD |
683 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
684 | u32 center_freq, | |
685 | u32 bandwidth) | |
3d9d1d66 JB |
686 | { |
687 | struct ieee80211_channel *c; | |
2f301ab2 | 688 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
689 | bool dfs_offload; |
690 | ||
691 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
692 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 693 | |
40d1ba63 JD |
694 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
695 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 696 | |
6bc54fbc JD |
697 | /* |
698 | * Check entire range of channels for the bandwidth. | |
699 | * If any channel in between is disabled or has not | |
700 | * had gone through CAC return false | |
701 | */ | |
934f4c7d TP |
702 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
703 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
704 | if (!c) |
705 | return false; | |
706 | ||
6bc54fbc JD |
707 | if (c->flags & IEEE80211_CHAN_DISABLED) |
708 | return false; | |
709 | ||
2c390e44 DL |
710 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
711 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
712 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 713 | return false; |
6bc54fbc JD |
714 | } |
715 | ||
716 | return true; | |
717 | } | |
718 | ||
719 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
720 | const struct cfg80211_chan_def *chandef) | |
721 | { | |
722 | int width; | |
723 | int r; | |
724 | ||
725 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
726 | return false; | |
727 | ||
728 | width = cfg80211_chandef_get_width(chandef); | |
729 | if (width < 0) | |
730 | return false; | |
731 | ||
934f4c7d TP |
732 | r = cfg80211_get_chans_dfs_available(wiphy, |
733 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
734 | width); |
735 | ||
736 | /* If any of channels unavailable for cf1 just return */ | |
737 | if (!r) | |
738 | return r; | |
739 | ||
740 | switch (chandef->width) { | |
741 | case NL80211_CHAN_WIDTH_80P80: | |
742 | WARN_ON(!chandef->center_freq2); | |
743 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
744 | MHZ_TO_KHZ(chandef->center_freq2), |
745 | width); | |
680682d4 | 746 | break; |
6bc54fbc JD |
747 | default: |
748 | WARN_ON(chandef->center_freq2); | |
749 | break; | |
750 | } | |
751 | ||
752 | return r; | |
753 | } | |
754 | ||
31559f35 JD |
755 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
756 | u32 center_freq, | |
757 | u32 bandwidth) | |
758 | { | |
759 | struct ieee80211_channel *c; | |
760 | u32 start_freq, end_freq, freq; | |
761 | unsigned int dfs_cac_ms = 0; | |
762 | ||
763 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
764 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
765 | ||
934f4c7d TP |
766 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
767 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
768 | if (!c) |
769 | return 0; | |
770 | ||
771 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
772 | return 0; | |
773 | ||
774 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
775 | continue; | |
776 | ||
777 | if (c->dfs_cac_ms > dfs_cac_ms) | |
778 | dfs_cac_ms = c->dfs_cac_ms; | |
779 | } | |
780 | ||
781 | return dfs_cac_ms; | |
782 | } | |
783 | ||
784 | unsigned int | |
785 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
786 | const struct cfg80211_chan_def *chandef) | |
787 | { | |
788 | int width; | |
789 | unsigned int t1 = 0, t2 = 0; | |
790 | ||
791 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
792 | return 0; | |
793 | ||
794 | width = cfg80211_chandef_get_width(chandef); | |
795 | if (width < 0) | |
796 | return 0; | |
797 | ||
798 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 799 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
800 | width); |
801 | ||
802 | if (!chandef->center_freq2) | |
803 | return t1; | |
804 | ||
805 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 806 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
807 | width); |
808 | ||
809 | return max(t1, t2); | |
810 | } | |
6bc54fbc JD |
811 | |
812 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
813 | u32 center_freq, u32 bandwidth, | |
814 | u32 prohibited_flags) | |
815 | { | |
816 | struct ieee80211_channel *c; | |
817 | u32 freq, start_freq, end_freq; | |
04f39047 | 818 | |
6bc54fbc JD |
819 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
820 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
821 | ||
934f4c7d TP |
822 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
823 | c = ieee80211_get_channel_khz(wiphy, freq); | |
6bc54fbc | 824 | if (!c || c->flags & prohibited_flags) |
3d9d1d66 | 825 | return false; |
9236d838 LR |
826 | } |
827 | ||
3d9d1d66 JB |
828 | return true; |
829 | } | |
830 | ||
2a38075c AAL |
831 | /* check if the operating channels are valid and supported */ |
832 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
833 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
834 | int primary_channel, | |
835 | struct ieee80211_edmg *edmg_cap) | |
836 | { | |
837 | struct ieee80211_channel *chan; | |
838 | int i, freq; | |
839 | int channels_counter = 0; | |
840 | ||
841 | if (!edmg_channels && !edmg_bw_config) | |
842 | return true; | |
843 | ||
844 | if ((!edmg_channels && edmg_bw_config) || | |
845 | (edmg_channels && !edmg_bw_config)) | |
846 | return false; | |
847 | ||
848 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
849 | return false; | |
850 | ||
851 | /* 60GHz channels 1..6 */ | |
852 | for (i = 0; i < 6; i++) { | |
853 | if (!(edmg_channels & BIT(i))) | |
854 | continue; | |
855 | ||
856 | if (!(edmg_cap->channels & BIT(i))) | |
857 | return false; | |
858 | ||
859 | channels_counter++; | |
860 | ||
861 | freq = ieee80211_channel_to_frequency(i + 1, | |
862 | NL80211_BAND_60GHZ); | |
863 | chan = ieee80211_get_channel(wiphy, freq); | |
864 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
865 | return false; | |
866 | } | |
867 | ||
868 | /* IEEE802.11 allows max 4 channels */ | |
869 | if (channels_counter > 4) | |
870 | return false; | |
871 | ||
872 | /* check bw_config is a subset of what driver supports | |
873 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
874 | */ | |
875 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
876 | return false; | |
877 | ||
878 | if (edmg_bw_config > edmg_cap->bw_config) | |
879 | return false; | |
880 | ||
881 | return true; | |
882 | } | |
883 | ||
9f5e8f6e JB |
884 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
885 | const struct cfg80211_chan_def *chandef, | |
886 | u32 prohibited_flags) | |
3d9d1d66 | 887 | { |
9f5e8f6e JB |
888 | struct ieee80211_sta_ht_cap *ht_cap; |
889 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 890 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 891 | u32 width, control_freq, cap; |
3d9d1d66 | 892 | |
9f5e8f6e JB |
893 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
894 | return false; | |
3d9d1d66 | 895 | |
9f5e8f6e JB |
896 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
897 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c AAL |
898 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
899 | ||
900 | if (edmg_cap->channels && | |
901 | !cfg80211_edmg_usable(wiphy, | |
902 | chandef->edmg.channels, | |
903 | chandef->edmg.bw_config, | |
904 | chandef->chan->hw_value, | |
905 | edmg_cap)) | |
906 | return false; | |
3d9d1d66 | 907 | |
9f5e8f6e | 908 | control_freq = chandef->chan->center_freq; |
9236d838 | 909 | |
3d9d1d66 | 910 | switch (chandef->width) { |
2f301ab2 SW |
911 | case NL80211_CHAN_WIDTH_5: |
912 | width = 5; | |
913 | break; | |
914 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 915 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
916 | width = 10; |
917 | break; | |
3d9d1d66 | 918 | case NL80211_CHAN_WIDTH_20: |
9f5e8f6e JB |
919 | if (!ht_cap->ht_supported) |
920 | return false; | |
925b5978 | 921 | /* fall through */ |
9f5e8f6e | 922 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 923 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
924 | width = 20; |
925 | break; | |
926 | case NL80211_CHAN_WIDTH_40: | |
927 | width = 40; | |
9f5e8f6e JB |
928 | if (!ht_cap->ht_supported) |
929 | return false; | |
930 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
931 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
932 | return false; | |
933 | if (chandef->center_freq1 < control_freq && | |
934 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
935 | return false; | |
936 | if (chandef->center_freq1 > control_freq && | |
937 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
938 | return false; | |
3d9d1d66 | 939 | break; |
3d9d1d66 | 940 | case NL80211_CHAN_WIDTH_80P80: |
08f6f147 JM |
941 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
942 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e | 943 | return false; |
925b5978 | 944 | /* fall through */ |
9f5e8f6e JB |
945 | case NL80211_CHAN_WIDTH_80: |
946 | if (!vht_cap->vht_supported) | |
947 | return false; | |
c7a6ee27 | 948 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 JB |
949 | width = 80; |
950 | break; | |
951 | case NL80211_CHAN_WIDTH_160: | |
9f5e8f6e JB |
952 | if (!vht_cap->vht_supported) |
953 | return false; | |
08f6f147 JM |
954 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
955 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
956 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
9f5e8f6e | 957 | return false; |
c7a6ee27 | 958 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
3d9d1d66 JB |
959 | width = 160; |
960 | break; | |
961 | default: | |
962 | WARN_ON_ONCE(1); | |
9236d838 | 963 | return false; |
4ee3e063 | 964 | } |
3d9d1d66 | 965 | |
c7a6ee27 JB |
966 | /* |
967 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
968 | * allowed by the driver, or only certain combinations? | |
969 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
970 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
971 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
972 | * no way to cover 80+80 MHz or more complex restrictions. | |
973 | * Note that such restrictions also need to be advertised to | |
974 | * userspace, for example for P2P channel selection. | |
975 | */ | |
9f5e8f6e | 976 | |
a6662dba JB |
977 | if (width > 20) |
978 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
979 | ||
2f301ab2 SW |
980 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
981 | if (width < 20) | |
982 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
983 | ||
984 | ||
934f4c7d TP |
985 | if (!cfg80211_secondary_chans_ok(wiphy, |
986 | ieee80211_chandef_to_khz(chandef), | |
9f5e8f6e JB |
987 | width, prohibited_flags)) |
988 | return false; | |
989 | ||
990 | if (!chandef->center_freq2) | |
991 | return true; | |
934f4c7d TP |
992 | return cfg80211_secondary_chans_ok(wiphy, |
993 | MHZ_TO_KHZ(chandef->center_freq2), | |
9f5e8f6e JB |
994 | width, prohibited_flags); |
995 | } | |
996 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
997 | ||
174e0cd2 | 998 | /* |
06f207fc AN |
999 | * Check if the channel can be used under permissive conditions mandated by |
1000 | * some regulatory bodies, i.e., the channel is marked with | |
1001 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1002 | * associated to an AP on the same channel or on the same UNII band |
1003 | * (assuming that the AP is an authorized master). | |
06f207fc | 1004 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1005 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1006 | */ |
06f207fc AN |
1007 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1008 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1009 | struct ieee80211_channel *chan) |
1010 | { | |
be69c24a | 1011 | struct wireless_dev *wdev; |
06f207fc | 1012 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 IP |
1013 | |
1014 | ASSERT_RTNL(); | |
1015 | ||
97f2645f | 1016 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1017 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1018 | return false; | |
1019 | ||
06f207fc AN |
1020 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1021 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1022 | iftype != NL80211_IFTYPE_STATION && | |
1023 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1024 | return false; | |
1025 | ||
c8866e55 IP |
1026 | if (regulatory_indoor_allowed() && |
1027 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1028 | return true; | |
1029 | ||
06f207fc | 1030 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1031 | return false; |
1032 | ||
1033 | /* | |
1034 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1035 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1036 | * enforce the relaxation (by doing a similar verifications as this), |
1037 | * and thus fail the GO instantiation, consider only the interfaces of | |
1038 | * the current registered device. | |
1039 | */ | |
53873f13 | 1040 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
174e0cd2 IP |
1041 | struct ieee80211_channel *other_chan = NULL; |
1042 | int r1, r2; | |
1043 | ||
be69c24a AS |
1044 | wdev_lock(wdev); |
1045 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1046 | wdev->current_bss) | |
1047 | other_chan = wdev->current_bss->pub.channel; | |
1048 | ||
1049 | /* | |
1050 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1051 | * this one (maybe the same one) can beacon as well. We allow | |
1052 | * the operation even if the station we relied on with | |
1053 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1054 | * we're not outdoor on an indoor-only channel. | |
1055 | */ | |
06f207fc AN |
1056 | if (iftype == NL80211_IFTYPE_P2P_GO && |
1057 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
be69c24a AS |
1058 | wdev->beacon_interval && |
1059 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1060 | other_chan = wdev->chandef.chan; | |
1061 | wdev_unlock(wdev); | |
174e0cd2 IP |
1062 | |
1063 | if (!other_chan) | |
1064 | continue; | |
1065 | ||
1066 | if (chan == other_chan) | |
1067 | return true; | |
1068 | ||
0816e6b1 AS |
1069 | if (chan->band != NL80211_BAND_5GHZ && |
1070 | chan->band != NL80211_BAND_6GHZ) | |
174e0cd2 IP |
1071 | continue; |
1072 | ||
1073 | r1 = cfg80211_get_unii(chan->center_freq); | |
1074 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1075 | ||
46d53724 IP |
1076 | if (r1 != -EINVAL && r1 == r2) { |
1077 | /* | |
1078 | * At some locations channels 149-165 are considered a | |
1079 | * bundle, but at other locations, e.g., Indonesia, | |
1080 | * channels 149-161 are considered a bundle while | |
1081 | * channel 165 is left out and considered to be in a | |
1082 | * different bundle. Thus, in case that there is a | |
1083 | * station interface connected to an AP on channel 165, | |
1084 | * it is assumed that channels 149-161 are allowed for | |
1085 | * GO operations. However, having a station interface | |
1086 | * connected to an AP on channels 149-161, does not | |
1087 | * allow GO operation on channel 165. | |
1088 | */ | |
1089 | if (chan->center_freq == 5825 && | |
1090 | other_chan->center_freq != 5825) | |
1091 | continue; | |
174e0cd2 | 1092 | return true; |
46d53724 | 1093 | } |
174e0cd2 IP |
1094 | } |
1095 | ||
1096 | return false; | |
1097 | } | |
1098 | ||
923b352f AN |
1099 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1100 | struct cfg80211_chan_def *chandef, | |
1101 | enum nl80211_iftype iftype, | |
1102 | bool check_no_ir) | |
9f5e8f6e JB |
1103 | { |
1104 | bool res; | |
6bc54fbc | 1105 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED | |
6bc54fbc | 1106 | IEEE80211_CHAN_RADAR; |
9f5e8f6e | 1107 | |
923b352f | 1108 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1109 | |
923b352f | 1110 | if (check_no_ir) |
174e0cd2 | 1111 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1112 | |
00ec75fc | 1113 | if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && |
6bc54fbc JD |
1114 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1115 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1116 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1117 | } | |
1118 | ||
1119 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1120 | |
1121 | trace_cfg80211_return_bool(res); | |
1122 | return res; | |
9236d838 | 1123 | } |
923b352f AN |
1124 | |
1125 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1126 | struct cfg80211_chan_def *chandef, | |
1127 | enum nl80211_iftype iftype) | |
1128 | { | |
1129 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1130 | } | |
683b6d3b | 1131 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1132 | |
923b352f AN |
1133 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1134 | struct cfg80211_chan_def *chandef, | |
1135 | enum nl80211_iftype iftype) | |
1136 | { | |
1137 | bool check_no_ir; | |
1138 | ||
1139 | ASSERT_RTNL(); | |
1140 | ||
1141 | /* | |
1142 | * Under certain conditions suggested by some regulatory bodies a | |
1143 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1144 | * only if such relaxations are not enabled and the conditions are not | |
1145 | * met. | |
1146 | */ | |
1147 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1148 | chandef->chan); | |
1149 | ||
1150 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1151 | } | |
1152 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1153 | ||
e8c9bd5b | 1154 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1155 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1156 | { |
e8c9bd5b | 1157 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1158 | return -EOPNOTSUPP; |
4f03c1ed MK |
1159 | if (!cfg80211_has_monitors_only(rdev)) |
1160 | return -EBUSY; | |
9588bbd5 | 1161 | |
683b6d3b | 1162 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1163 | } |
26ab9a0c MK |
1164 | |
1165 | void | |
8e95ea49 | 1166 | cfg80211_get_chan_state(struct wireless_dev *wdev, |
26ab9a0c | 1167 | struct ieee80211_channel **chan, |
9e0e2961 MK |
1168 | enum cfg80211_chan_mode *chanmode, |
1169 | u8 *radar_detect) | |
26ab9a0c | 1170 | { |
2beb6dab LC |
1171 | int ret; |
1172 | ||
26ab9a0c MK |
1173 | *chan = NULL; |
1174 | *chanmode = CHAN_MODE_UNDEFINED; | |
1175 | ||
26ab9a0c MK |
1176 | ASSERT_WDEV_LOCK(wdev); |
1177 | ||
98104fde | 1178 | if (wdev->netdev && !netif_running(wdev->netdev)) |
26ab9a0c MK |
1179 | return; |
1180 | ||
1181 | switch (wdev->iftype) { | |
1182 | case NL80211_IFTYPE_ADHOC: | |
1183 | if (wdev->current_bss) { | |
1184 | *chan = wdev->current_bss->pub.channel; | |
5336fa88 SW |
1185 | *chanmode = (wdev->ibss_fixed && |
1186 | !wdev->ibss_dfs_possible) | |
26ab9a0c MK |
1187 | ? CHAN_MODE_SHARED |
1188 | : CHAN_MODE_EXCLUSIVE; | |
9e0e2961 MK |
1189 | |
1190 | /* consider worst-case - IBSS can try to return to the | |
1191 | * original user-specified channel as creator */ | |
1192 | if (wdev->ibss_dfs_possible) | |
1193 | *radar_detect |= BIT(wdev->chandef.width); | |
26ab9a0c MK |
1194 | return; |
1195 | } | |
0f0094b3 | 1196 | break; |
26ab9a0c MK |
1197 | case NL80211_IFTYPE_STATION: |
1198 | case NL80211_IFTYPE_P2P_CLIENT: | |
1199 | if (wdev->current_bss) { | |
1200 | *chan = wdev->current_bss->pub.channel; | |
1201 | *chanmode = CHAN_MODE_SHARED; | |
1202 | return; | |
1203 | } | |
1204 | break; | |
1205 | case NL80211_IFTYPE_AP: | |
1206 | case NL80211_IFTYPE_P2P_GO: | |
04f39047 | 1207 | if (wdev->cac_started) { |
9e0e2961 | 1208 | *chan = wdev->chandef.chan; |
04f39047 | 1209 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1210 | *radar_detect |= BIT(wdev->chandef.width); |
04f39047 | 1211 | } else if (wdev->beacon_interval) { |
9e0e2961 | 1212 | *chan = wdev->chandef.chan; |
f53594a0 | 1213 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1214 | |
2beb6dab LC |
1215 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1216 | &wdev->chandef, | |
1217 | wdev->iftype); | |
1218 | WARN_ON(ret < 0); | |
1219 | if (ret > 0) | |
9e0e2961 | 1220 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 FF |
1221 | } |
1222 | return; | |
26ab9a0c | 1223 | case NL80211_IFTYPE_MESH_POINT: |
f53594a0 | 1224 | if (wdev->mesh_id_len) { |
9e0e2961 | 1225 | *chan = wdev->chandef.chan; |
f53594a0 | 1226 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1227 | |
2beb6dab LC |
1228 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1229 | &wdev->chandef, | |
1230 | wdev->iftype); | |
1231 | WARN_ON(ret < 0); | |
1232 | if (ret > 0) | |
9e0e2961 | 1233 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 | 1234 | } |
26ab9a0c | 1235 | return; |
6e0bd6c3 RL |
1236 | case NL80211_IFTYPE_OCB: |
1237 | if (wdev->chandef.chan) { | |
1238 | *chan = wdev->chandef.chan; | |
1239 | *chanmode = CHAN_MODE_SHARED; | |
1240 | return; | |
1241 | } | |
1242 | break; | |
26ab9a0c MK |
1243 | case NL80211_IFTYPE_MONITOR: |
1244 | case NL80211_IFTYPE_AP_VLAN: | |
1245 | case NL80211_IFTYPE_WDS: | |
98104fde | 1246 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1247 | case NL80211_IFTYPE_NAN: |
e7aceef4 | 1248 | /* these interface types don't really have a channel */ |
98104fde | 1249 | return; |
26ab9a0c MK |
1250 | case NL80211_IFTYPE_UNSPECIFIED: |
1251 | case NUM_NL80211_IFTYPES: | |
1252 | WARN_ON(1); | |
1253 | } | |
26ab9a0c | 1254 | } |