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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 |
34c9a0e7 | 9 | * Copyright 2018-2022 Intel Corporation |
59bbb6f7 JB |
10 | */ |
11 | ||
54858ee5 | 12 | #include <linux/export.h> |
35799944 | 13 | #include <linux/bitfield.h> |
59bbb6f7 JB |
14 | #include <net/cfg80211.h> |
15 | #include "core.h" | |
e35e4d28 | 16 | #include "rdev-ops.h" |
59bbb6f7 | 17 | |
2a38075c AAL |
18 | static bool cfg80211_valid_60g_freq(u32 freq) |
19 | { | |
20 | return freq >= 58320 && freq <= 70200; | |
21 | } | |
22 | ||
3d9d1d66 JB |
23 | void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, |
24 | struct ieee80211_channel *chan, | |
25 | enum nl80211_channel_type chan_type) | |
9236d838 | 26 | { |
3d9d1d66 JB |
27 | if (WARN_ON(!chan)) |
28 | return; | |
9236d838 | 29 | |
3d9d1d66 | 30 | chandef->chan = chan; |
934f4c7d | 31 | chandef->freq1_offset = chan->freq_offset; |
3d9d1d66 | 32 | chandef->center_freq2 = 0; |
2a38075c AAL |
33 | chandef->edmg.bw_config = 0; |
34 | chandef->edmg.channels = 0; | |
4ee3e063 | 35 | |
3d9d1d66 JB |
36 | switch (chan_type) { |
37 | case NL80211_CHAN_NO_HT: | |
38 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
39 | chandef->center_freq1 = chan->center_freq; | |
40 | break; | |
41 | case NL80211_CHAN_HT20: | |
42 | chandef->width = NL80211_CHAN_WIDTH_20; | |
43 | chandef->center_freq1 = chan->center_freq; | |
44 | break; | |
9236d838 | 45 | case NL80211_CHAN_HT40PLUS: |
3d9d1d66 JB |
46 | chandef->width = NL80211_CHAN_WIDTH_40; |
47 | chandef->center_freq1 = chan->center_freq + 10; | |
09a02fdb | 48 | break; |
9236d838 | 49 | case NL80211_CHAN_HT40MINUS: |
3d9d1d66 JB |
50 | chandef->width = NL80211_CHAN_WIDTH_40; |
51 | chandef->center_freq1 = chan->center_freq - 10; | |
09a02fdb | 52 | break; |
9236d838 | 53 | default: |
3d9d1d66 JB |
54 | WARN_ON(1); |
55 | } | |
56 | } | |
57 | EXPORT_SYMBOL(cfg80211_chandef_create); | |
58 | ||
2a38075c AAL |
59 | static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) |
60 | { | |
61 | int max_contiguous = 0; | |
62 | int num_of_enabled = 0; | |
63 | int contiguous = 0; | |
64 | int i; | |
65 | ||
66 | if (!chandef->edmg.channels || !chandef->edmg.bw_config) | |
67 | return false; | |
68 | ||
69 | if (!cfg80211_valid_60g_freq(chandef->chan->center_freq)) | |
70 | return false; | |
71 | ||
72 | for (i = 0; i < 6; i++) { | |
73 | if (chandef->edmg.channels & BIT(i)) { | |
74 | contiguous++; | |
75 | num_of_enabled++; | |
76 | } else { | |
77 | contiguous = 0; | |
78 | } | |
79 | ||
80 | max_contiguous = max(contiguous, max_contiguous); | |
81 | } | |
82 | /* basic verification of edmg configuration according to | |
83 | * IEEE P802.11ay/D4.0 section 9.4.2.251 | |
84 | */ | |
85 | /* check bw_config against contiguous edmg channels */ | |
86 | switch (chandef->edmg.bw_config) { | |
87 | case IEEE80211_EDMG_BW_CONFIG_4: | |
88 | case IEEE80211_EDMG_BW_CONFIG_8: | |
89 | case IEEE80211_EDMG_BW_CONFIG_12: | |
90 | if (max_contiguous < 1) | |
91 | return false; | |
92 | break; | |
93 | case IEEE80211_EDMG_BW_CONFIG_5: | |
94 | case IEEE80211_EDMG_BW_CONFIG_9: | |
95 | case IEEE80211_EDMG_BW_CONFIG_13: | |
96 | if (max_contiguous < 2) | |
97 | return false; | |
98 | break; | |
99 | case IEEE80211_EDMG_BW_CONFIG_6: | |
100 | case IEEE80211_EDMG_BW_CONFIG_10: | |
101 | case IEEE80211_EDMG_BW_CONFIG_14: | |
102 | if (max_contiguous < 3) | |
103 | return false; | |
104 | break; | |
105 | case IEEE80211_EDMG_BW_CONFIG_7: | |
106 | case IEEE80211_EDMG_BW_CONFIG_11: | |
107 | case IEEE80211_EDMG_BW_CONFIG_15: | |
108 | if (max_contiguous < 4) | |
109 | return false; | |
110 | break; | |
111 | ||
112 | default: | |
113 | return false; | |
114 | } | |
115 | ||
116 | /* check bw_config against aggregated (non contiguous) edmg channels */ | |
117 | switch (chandef->edmg.bw_config) { | |
118 | case IEEE80211_EDMG_BW_CONFIG_4: | |
119 | case IEEE80211_EDMG_BW_CONFIG_5: | |
120 | case IEEE80211_EDMG_BW_CONFIG_6: | |
121 | case IEEE80211_EDMG_BW_CONFIG_7: | |
122 | break; | |
123 | case IEEE80211_EDMG_BW_CONFIG_8: | |
124 | case IEEE80211_EDMG_BW_CONFIG_9: | |
125 | case IEEE80211_EDMG_BW_CONFIG_10: | |
126 | case IEEE80211_EDMG_BW_CONFIG_11: | |
127 | if (num_of_enabled < 2) | |
128 | return false; | |
129 | break; | |
130 | case IEEE80211_EDMG_BW_CONFIG_12: | |
131 | case IEEE80211_EDMG_BW_CONFIG_13: | |
132 | case IEEE80211_EDMG_BW_CONFIG_14: | |
133 | case IEEE80211_EDMG_BW_CONFIG_15: | |
134 | if (num_of_enabled < 4 || max_contiguous < 2) | |
135 | return false; | |
136 | break; | |
137 | default: | |
138 | return false; | |
139 | } | |
140 | ||
141 | return true; | |
142 | } | |
143 | ||
11b34737 TP |
144 | static int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width) |
145 | { | |
146 | int mhz; | |
147 | ||
148 | switch (chan_width) { | |
149 | case NL80211_CHAN_WIDTH_1: | |
150 | mhz = 1; | |
151 | break; | |
152 | case NL80211_CHAN_WIDTH_2: | |
153 | mhz = 2; | |
154 | break; | |
155 | case NL80211_CHAN_WIDTH_4: | |
156 | mhz = 4; | |
157 | break; | |
158 | case NL80211_CHAN_WIDTH_8: | |
159 | mhz = 8; | |
160 | break; | |
161 | case NL80211_CHAN_WIDTH_16: | |
162 | mhz = 16; | |
163 | break; | |
164 | case NL80211_CHAN_WIDTH_5: | |
165 | mhz = 5; | |
166 | break; | |
167 | case NL80211_CHAN_WIDTH_10: | |
168 | mhz = 10; | |
169 | break; | |
170 | case NL80211_CHAN_WIDTH_20: | |
171 | case NL80211_CHAN_WIDTH_20_NOHT: | |
172 | mhz = 20; | |
173 | break; | |
174 | case NL80211_CHAN_WIDTH_40: | |
175 | mhz = 40; | |
176 | break; | |
177 | case NL80211_CHAN_WIDTH_80P80: | |
178 | case NL80211_CHAN_WIDTH_80: | |
179 | mhz = 80; | |
180 | break; | |
181 | case NL80211_CHAN_WIDTH_160: | |
182 | mhz = 160; | |
183 | break; | |
3743bec6 JD |
184 | case NL80211_CHAN_WIDTH_320: |
185 | mhz = 320; | |
186 | break; | |
11b34737 TP |
187 | default: |
188 | WARN_ON_ONCE(1); | |
189 | return -1; | |
190 | } | |
191 | return mhz; | |
192 | } | |
193 | ||
194 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) | |
195 | { | |
196 | return nl80211_chan_width_to_mhz(c->width); | |
197 | } | |
198 | ||
9f5e8f6e | 199 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 | 200 | { |
11b34737 TP |
201 | u32 control_freq, oper_freq; |
202 | int oper_width, control_width; | |
3d9d1d66 JB |
203 | |
204 | if (!chandef->chan) | |
205 | return false; | |
206 | ||
be689f68 JB |
207 | if (chandef->freq1_offset >= 1000) |
208 | return false; | |
209 | ||
3d9d1d66 JB |
210 | control_freq = chandef->chan->center_freq; |
211 | ||
212 | switch (chandef->width) { | |
2f301ab2 SW |
213 | case NL80211_CHAN_WIDTH_5: |
214 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
215 | case NL80211_CHAN_WIDTH_20: |
216 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
217 | if (ieee80211_chandef_to_khz(chandef) != |
218 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
219 | return false; |
220 | if (chandef->center_freq2) | |
221 | return false; | |
222 | break; | |
c1cd35c6 | 223 | case NL80211_CHAN_WIDTH_1: |
11b34737 TP |
224 | case NL80211_CHAN_WIDTH_2: |
225 | case NL80211_CHAN_WIDTH_4: | |
226 | case NL80211_CHAN_WIDTH_8: | |
227 | case NL80211_CHAN_WIDTH_16: | |
c1cd35c6 TP |
228 | if (chandef->chan->band != NL80211_BAND_S1GHZ) |
229 | return false; | |
230 | ||
11b34737 TP |
231 | control_freq = ieee80211_channel_to_khz(chandef->chan); |
232 | oper_freq = ieee80211_chandef_to_khz(chandef); | |
233 | control_width = nl80211_chan_width_to_mhz( | |
234 | ieee80211_s1g_channel_width( | |
235 | chandef->chan)); | |
236 | oper_width = cfg80211_chandef_get_width(chandef); | |
237 | ||
238 | if (oper_width < 0 || control_width < 0) | |
239 | return false; | |
240 | if (chandef->center_freq2) | |
241 | return false; | |
242 | ||
243 | if (control_freq + MHZ_TO_KHZ(control_width) / 2 > | |
244 | oper_freq + MHZ_TO_KHZ(oper_width) / 2) | |
245 | return false; | |
246 | ||
247 | if (control_freq - MHZ_TO_KHZ(control_width) / 2 < | |
248 | oper_freq - MHZ_TO_KHZ(oper_width) / 2) | |
249 | return false; | |
250 | break; | |
3d9d1d66 | 251 | case NL80211_CHAN_WIDTH_80P80: |
3d9d1d66 JB |
252 | if (!chandef->center_freq2) |
253 | return false; | |
9cab3151 JB |
254 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
255 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
256 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
257 | return false; | |
3d9d1d66 | 258 | break; |
3bb1ccc4 | 259 | default: |
3d9d1d66 JB |
260 | if (chandef->center_freq2) |
261 | return false; | |
262 | break; | |
3bb1ccc4 JB |
263 | } |
264 | ||
265 | switch (chandef->width) { | |
266 | case NL80211_CHAN_WIDTH_5: | |
267 | case NL80211_CHAN_WIDTH_10: | |
268 | case NL80211_CHAN_WIDTH_20: | |
269 | case NL80211_CHAN_WIDTH_20_NOHT: | |
270 | case NL80211_CHAN_WIDTH_1: | |
271 | case NL80211_CHAN_WIDTH_2: | |
272 | case NL80211_CHAN_WIDTH_4: | |
273 | case NL80211_CHAN_WIDTH_8: | |
274 | case NL80211_CHAN_WIDTH_16: | |
275 | /* all checked above */ | |
3d9d1d66 | 276 | break; |
3743bec6 JD |
277 | case NL80211_CHAN_WIDTH_320: |
278 | if (chandef->center_freq1 == control_freq + 150 || | |
279 | chandef->center_freq1 == control_freq + 130 || | |
280 | chandef->center_freq1 == control_freq + 110 || | |
281 | chandef->center_freq1 == control_freq + 90 || | |
282 | chandef->center_freq1 == control_freq - 90 || | |
283 | chandef->center_freq1 == control_freq - 110 || | |
284 | chandef->center_freq1 == control_freq - 130 || | |
285 | chandef->center_freq1 == control_freq - 150) | |
286 | break; | |
287 | fallthrough; | |
3bb1ccc4 JB |
288 | case NL80211_CHAN_WIDTH_160: |
289 | if (chandef->center_freq1 == control_freq + 70 || | |
290 | chandef->center_freq1 == control_freq + 50 || | |
291 | chandef->center_freq1 == control_freq - 50 || | |
292 | chandef->center_freq1 == control_freq - 70) | |
293 | break; | |
294 | fallthrough; | |
295 | case NL80211_CHAN_WIDTH_80P80: | |
296 | case NL80211_CHAN_WIDTH_80: | |
297 | if (chandef->center_freq1 == control_freq + 30 || | |
298 | chandef->center_freq1 == control_freq - 30) | |
299 | break; | |
300 | fallthrough; | |
301 | case NL80211_CHAN_WIDTH_40: | |
302 | if (chandef->center_freq1 == control_freq + 10 || | |
303 | chandef->center_freq1 == control_freq - 10) | |
304 | break; | |
305 | fallthrough; | |
3d9d1d66 JB |
306 | default: |
307 | return false; | |
308 | } | |
309 | ||
ec649fed MH |
310 | /* channel 14 is only for IEEE 802.11b */ |
311 | if (chandef->center_freq1 == 2484 && | |
312 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
313 | return false; | |
314 | ||
2a38075c AAL |
315 | if (cfg80211_chandef_is_edmg(chandef) && |
316 | !cfg80211_edmg_chandef_valid(chandef)) | |
317 | return false; | |
318 | ||
3d9d1d66 JB |
319 | return true; |
320 | } | |
9f5e8f6e | 321 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
322 | |
323 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
3743bec6 | 324 | u32 *pri40, u32 *pri80, u32 *pri160) |
3d9d1d66 JB |
325 | { |
326 | int tmp; | |
327 | ||
328 | switch (c->width) { | |
329 | case NL80211_CHAN_WIDTH_40: | |
330 | *pri40 = c->center_freq1; | |
331 | *pri80 = 0; | |
3743bec6 | 332 | *pri160 = 0; |
3d9d1d66 JB |
333 | break; |
334 | case NL80211_CHAN_WIDTH_80: | |
335 | case NL80211_CHAN_WIDTH_80P80: | |
3743bec6 | 336 | *pri160 = 0; |
3d9d1d66 JB |
337 | *pri80 = c->center_freq1; |
338 | /* n_P20 */ | |
339 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
340 | /* n_P40 */ | |
341 | tmp /= 2; | |
342 | /* freq_P40 */ | |
343 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
344 | break; | |
345 | case NL80211_CHAN_WIDTH_160: | |
3743bec6 | 346 | *pri160 = c->center_freq1; |
3d9d1d66 JB |
347 | /* n_P20 */ |
348 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
349 | /* n_P40 */ | |
350 | tmp /= 2; | |
351 | /* freq_P40 */ | |
352 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
353 | /* n_P80 */ | |
354 | tmp /= 2; | |
355 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
356 | break; | |
3743bec6 JD |
357 | case NL80211_CHAN_WIDTH_320: |
358 | /* n_P20 */ | |
359 | tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; | |
360 | /* n_P40 */ | |
361 | tmp /= 2; | |
362 | /* freq_P40 */ | |
363 | *pri40 = c->center_freq1 - 140 + 40 * tmp; | |
364 | /* n_P80 */ | |
365 | tmp /= 2; | |
366 | *pri80 = c->center_freq1 - 120 + 80 * tmp; | |
367 | /* n_P160 */ | |
368 | tmp /= 2; | |
369 | *pri160 = c->center_freq1 - 80 + 160 * tmp; | |
370 | break; | |
3d9d1d66 JB |
371 | default: |
372 | WARN_ON_ONCE(1); | |
373 | } | |
374 | } | |
375 | ||
376 | const struct cfg80211_chan_def * | |
377 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
378 | const struct cfg80211_chan_def *c2) | |
379 | { | |
3743bec6 | 380 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80, c1_pri160, c2_pri160; |
3d9d1d66 JB |
381 | |
382 | /* If they are identical, return */ | |
383 | if (cfg80211_chandef_identical(c1, c2)) | |
384 | return c1; | |
385 | ||
386 | /* otherwise, must have same control channel */ | |
387 | if (c1->chan != c2->chan) | |
388 | return NULL; | |
389 | ||
390 | /* | |
391 | * If they have the same width, but aren't identical, | |
392 | * then they can't be compatible. | |
393 | */ | |
394 | if (c1->width == c2->width) | |
395 | return NULL; | |
396 | ||
2f301ab2 SW |
397 | /* |
398 | * can't be compatible if one of them is 5 or 10 MHz, | |
399 | * but they don't have the same width. | |
400 | */ | |
401 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
402 | c1->width == NL80211_CHAN_WIDTH_10 || | |
403 | c2->width == NL80211_CHAN_WIDTH_5 || | |
404 | c2->width == NL80211_CHAN_WIDTH_10) | |
405 | return NULL; | |
406 | ||
3d9d1d66 JB |
407 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
408 | c1->width == NL80211_CHAN_WIDTH_20) | |
409 | return c2; | |
410 | ||
411 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
412 | c2->width == NL80211_CHAN_WIDTH_20) | |
413 | return c1; | |
414 | ||
3743bec6 JD |
415 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80, &c1_pri160); |
416 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80, &c2_pri160); | |
3d9d1d66 JB |
417 | |
418 | if (c1_pri40 != c2_pri40) | |
419 | return NULL; | |
420 | ||
3743bec6 JD |
421 | if (c1->width == NL80211_CHAN_WIDTH_40) |
422 | return c2; | |
423 | ||
424 | if (c2->width == NL80211_CHAN_WIDTH_40) | |
425 | return c1; | |
426 | ||
427 | if (c1_pri80 != c2_pri80) | |
428 | return NULL; | |
429 | ||
430 | if (c1->width == NL80211_CHAN_WIDTH_80 && | |
431 | c2->width > NL80211_CHAN_WIDTH_80) | |
432 | return c2; | |
433 | ||
434 | if (c2->width == NL80211_CHAN_WIDTH_80 && | |
435 | c1->width > NL80211_CHAN_WIDTH_80) | |
436 | return c1; | |
437 | ||
438 | WARN_ON(!c1_pri160 && !c2_pri160); | |
439 | if (c1_pri160 && c2_pri160 && c1_pri160 != c2_pri160) | |
3d9d1d66 JB |
440 | return NULL; |
441 | ||
442 | if (c1->width > c2->width) | |
443 | return c1; | |
444 | return c2; | |
445 | } | |
446 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
447 | ||
04f39047 SW |
448 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
449 | u32 bandwidth, | |
450 | enum nl80211_dfs_state dfs_state) | |
451 | { | |
452 | struct ieee80211_channel *c; | |
453 | u32 freq; | |
454 | ||
455 | for (freq = center_freq - bandwidth/2 + 10; | |
456 | freq <= center_freq + bandwidth/2 - 10; | |
457 | freq += 20) { | |
458 | c = ieee80211_get_channel(wiphy, freq); | |
459 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
460 | continue; | |
461 | ||
462 | c->dfs_state = dfs_state; | |
463 | c->dfs_state_entered = jiffies; | |
464 | } | |
465 | } | |
466 | ||
467 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
468 | const struct cfg80211_chan_def *chandef, | |
469 | enum nl80211_dfs_state dfs_state) | |
470 | { | |
471 | int width; | |
472 | ||
473 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
474 | return; | |
475 | ||
476 | width = cfg80211_chandef_get_width(chandef); | |
477 | if (width < 0) | |
478 | return; | |
479 | ||
480 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
481 | width, dfs_state); | |
482 | ||
483 | if (!chandef->center_freq2) | |
484 | return; | |
485 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
486 | width, dfs_state); | |
487 | } | |
488 | ||
40d1ba63 JD |
489 | static u32 cfg80211_get_start_freq(u32 center_freq, |
490 | u32 bandwidth) | |
491 | { | |
492 | u32 start_freq; | |
493 | ||
934f4c7d TP |
494 | bandwidth = MHZ_TO_KHZ(bandwidth); |
495 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
496 | start_freq = center_freq; |
497 | else | |
934f4c7d | 498 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
499 | |
500 | return start_freq; | |
501 | } | |
502 | ||
503 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
504 | u32 bandwidth) | |
505 | { | |
506 | u32 end_freq; | |
507 | ||
934f4c7d TP |
508 | bandwidth = MHZ_TO_KHZ(bandwidth); |
509 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
510 | end_freq = center_freq; |
511 | else | |
934f4c7d | 512 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
513 | |
514 | return end_freq; | |
515 | } | |
516 | ||
04f39047 SW |
517 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
518 | u32 center_freq, | |
519 | u32 bandwidth) | |
520 | { | |
521 | struct ieee80211_channel *c; | |
2f301ab2 SW |
522 | u32 freq, start_freq, end_freq; |
523 | ||
40d1ba63 JD |
524 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
525 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 526 | |
934f4c7d TP |
527 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
528 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
529 | if (!c) |
530 | return -EINVAL; | |
531 | ||
532 | if (c->flags & IEEE80211_CHAN_RADAR) | |
533 | return 1; | |
534 | } | |
535 | return 0; | |
536 | } | |
537 | ||
538 | ||
539 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
540 | const struct cfg80211_chan_def *chandef, |
541 | enum nl80211_iftype iftype) | |
04f39047 SW |
542 | { |
543 | int width; | |
2beb6dab | 544 | int ret; |
04f39047 SW |
545 | |
546 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
547 | return -EINVAL; | |
548 | ||
2beb6dab LC |
549 | switch (iftype) { |
550 | case NL80211_IFTYPE_ADHOC: | |
551 | case NL80211_IFTYPE_AP: | |
552 | case NL80211_IFTYPE_P2P_GO: | |
553 | case NL80211_IFTYPE_MESH_POINT: | |
554 | width = cfg80211_chandef_get_width(chandef); | |
555 | if (width < 0) | |
556 | return -EINVAL; | |
04f39047 | 557 | |
2beb6dab | 558 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d TP |
559 | ieee80211_chandef_to_khz(chandef), |
560 | width); | |
2beb6dab LC |
561 | if (ret < 0) |
562 | return ret; | |
563 | else if (ret > 0) | |
564 | return BIT(chandef->width); | |
04f39047 | 565 | |
2beb6dab LC |
566 | if (!chandef->center_freq2) |
567 | return 0; | |
568 | ||
569 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d TP |
570 | MHZ_TO_KHZ(chandef->center_freq2), |
571 | width); | |
2beb6dab LC |
572 | if (ret < 0) |
573 | return ret; | |
574 | else if (ret > 0) | |
575 | return BIT(chandef->width); | |
04f39047 | 576 | |
2beb6dab LC |
577 | break; |
578 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 579 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
580 | case NL80211_IFTYPE_P2P_CLIENT: |
581 | case NL80211_IFTYPE_MONITOR: | |
582 | case NL80211_IFTYPE_AP_VLAN: | |
2beb6dab | 583 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 584 | case NL80211_IFTYPE_NAN: |
2beb6dab | 585 | break; |
e7e0517c | 586 | case NL80211_IFTYPE_WDS: |
00ec75fc | 587 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
588 | case NUM_NL80211_IFTYPES: |
589 | WARN_ON(1); | |
590 | } | |
591 | ||
592 | return 0; | |
04f39047 | 593 | } |
774f0734 | 594 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 595 | |
fe7c3a1f JD |
596 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
597 | u32 center_freq, | |
598 | u32 bandwidth) | |
599 | { | |
600 | struct ieee80211_channel *c; | |
601 | u32 freq, start_freq, end_freq; | |
602 | int count = 0; | |
603 | ||
604 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
605 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
606 | ||
607 | /* | |
608 | * Check entire range of channels for the bandwidth. | |
609 | * Check all channels are DFS channels (DFS_USABLE or | |
610 | * DFS_AVAILABLE). Return number of usable channels | |
611 | * (require CAC). Allow DFS and non-DFS channel mix. | |
612 | */ | |
934f4c7d TP |
613 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
614 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
615 | if (!c) |
616 | return -EINVAL; | |
617 | ||
618 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
619 | return -EINVAL; | |
620 | ||
621 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
622 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
623 | return -EINVAL; | |
624 | ||
625 | if (c->dfs_state == NL80211_DFS_USABLE) | |
626 | count++; | |
627 | } | |
628 | } | |
629 | ||
630 | return count; | |
631 | } | |
632 | ||
633 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
634 | const struct cfg80211_chan_def *chandef) | |
635 | { | |
636 | int width; | |
637 | int r1, r2 = 0; | |
638 | ||
639 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
640 | return false; | |
641 | ||
642 | width = cfg80211_chandef_get_width(chandef); | |
643 | if (width < 0) | |
644 | return false; | |
645 | ||
934f4c7d TP |
646 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
647 | MHZ_TO_KHZ(chandef->center_freq1), | |
648 | width); | |
fe7c3a1f JD |
649 | |
650 | if (r1 < 0) | |
651 | return false; | |
652 | ||
653 | switch (chandef->width) { | |
654 | case NL80211_CHAN_WIDTH_80P80: | |
655 | WARN_ON(!chandef->center_freq2); | |
656 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
657 | MHZ_TO_KHZ(chandef->center_freq2), |
658 | width); | |
fe7c3a1f JD |
659 | if (r2 < 0) |
660 | return false; | |
661 | break; | |
662 | default: | |
663 | WARN_ON(chandef->center_freq2); | |
664 | break; | |
665 | } | |
666 | ||
667 | return (r1 + r2 > 0); | |
668 | } | |
669 | ||
b35a51c7 VT |
670 | /* |
671 | * Checks if center frequency of chan falls with in the bandwidth | |
672 | * range of chandef. | |
673 | */ | |
674 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
7b0a0e3c JB |
675 | struct ieee80211_channel *chan, |
676 | bool primary_only) | |
b35a51c7 VT |
677 | { |
678 | int width; | |
a67a4893 | 679 | u32 freq; |
b35a51c7 | 680 | |
7b0a0e3c JB |
681 | if (!chandef->chan) |
682 | return false; | |
683 | ||
b35a51c7 VT |
684 | if (chandef->chan->center_freq == chan->center_freq) |
685 | return true; | |
686 | ||
7b0a0e3c JB |
687 | if (primary_only) |
688 | return false; | |
689 | ||
b35a51c7 VT |
690 | width = cfg80211_chandef_get_width(chandef); |
691 | if (width <= 20) | |
692 | return false; | |
693 | ||
b35a51c7 VT |
694 | for (freq = chandef->center_freq1 - width / 2 + 10; |
695 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
696 | if (chan->center_freq == freq) | |
697 | return true; | |
698 | } | |
699 | ||
700 | if (!chandef->center_freq2) | |
701 | return false; | |
702 | ||
703 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
704 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
705 | if (chan->center_freq == freq) | |
706 | return true; | |
707 | } | |
708 | ||
709 | return false; | |
710 | } | |
711 | ||
712 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
713 | { | |
7b0a0e3c | 714 | unsigned int link; |
b35a51c7 VT |
715 | |
716 | ASSERT_WDEV_LOCK(wdev); | |
717 | ||
b35a51c7 VT |
718 | switch (wdev->iftype) { |
719 | case NL80211_IFTYPE_AP: | |
720 | case NL80211_IFTYPE_P2P_GO: | |
7b0a0e3c JB |
721 | for_each_valid_link(wdev, link) { |
722 | if (wdev->links[link].ap.beacon_interval) | |
723 | return true; | |
724 | } | |
b35a51c7 VT |
725 | break; |
726 | case NL80211_IFTYPE_ADHOC: | |
7b0a0e3c JB |
727 | if (wdev->u.ibss.ssid_len) |
728 | return true; | |
b35a51c7 VT |
729 | break; |
730 | case NL80211_IFTYPE_MESH_POINT: | |
7b0a0e3c JB |
731 | if (wdev->u.mesh.id_len) |
732 | return true; | |
b35a51c7 VT |
733 | break; |
734 | case NL80211_IFTYPE_STATION: | |
735 | case NL80211_IFTYPE_OCB: | |
736 | case NL80211_IFTYPE_P2P_CLIENT: | |
737 | case NL80211_IFTYPE_MONITOR: | |
738 | case NL80211_IFTYPE_AP_VLAN: | |
b35a51c7 VT |
739 | case NL80211_IFTYPE_P2P_DEVICE: |
740 | /* Can NAN type be considered as beaconing interface? */ | |
741 | case NL80211_IFTYPE_NAN: | |
742 | break; | |
743 | case NL80211_IFTYPE_UNSPECIFIED: | |
e7e0517c | 744 | case NL80211_IFTYPE_WDS: |
b35a51c7 VT |
745 | case NUM_NL80211_IFTYPES: |
746 | WARN_ON(1); | |
747 | } | |
748 | ||
7b0a0e3c JB |
749 | return false; |
750 | } | |
751 | ||
752 | bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, | |
753 | struct ieee80211_channel *chan, | |
754 | bool primary_only) | |
755 | { | |
756 | unsigned int link; | |
757 | ||
758 | switch (wdev->iftype) { | |
759 | case NL80211_IFTYPE_AP: | |
760 | case NL80211_IFTYPE_P2P_GO: | |
761 | for_each_valid_link(wdev, link) { | |
762 | if (cfg80211_is_sub_chan(&wdev->links[link].ap.chandef, | |
763 | chan, primary_only)) | |
764 | return true; | |
765 | } | |
766 | break; | |
767 | case NL80211_IFTYPE_ADHOC: | |
768 | return cfg80211_is_sub_chan(&wdev->u.ibss.chandef, chan, | |
769 | primary_only); | |
770 | case NL80211_IFTYPE_MESH_POINT: | |
771 | return cfg80211_is_sub_chan(&wdev->u.mesh.chandef, chan, | |
772 | primary_only); | |
773 | default: | |
774 | break; | |
775 | } | |
776 | ||
777 | return false; | |
b35a51c7 VT |
778 | } |
779 | ||
89766727 VT |
780 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
781 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
782 | { |
783 | struct wireless_dev *wdev; | |
784 | ||
b35a51c7 VT |
785 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
786 | wdev_lock(wdev); | |
787 | if (!cfg80211_beaconing_iface_active(wdev)) { | |
788 | wdev_unlock(wdev); | |
789 | continue; | |
790 | } | |
791 | ||
7b0a0e3c | 792 | if (cfg80211_wdev_on_sub_chan(wdev, chan, false)) { |
b35a51c7 VT |
793 | wdev_unlock(wdev); |
794 | return true; | |
795 | } | |
796 | wdev_unlock(wdev); | |
797 | } | |
798 | ||
799 | return false; | |
800 | } | |
fe7c3a1f | 801 | |
84158164 LB |
802 | static bool |
803 | cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev, | |
804 | struct ieee80211_channel *channel) | |
805 | { | |
a95bfb87 | 806 | if (!rdev->background_radar_wdev) |
84158164 LB |
807 | return false; |
808 | ||
a95bfb87 | 809 | if (!cfg80211_chandef_valid(&rdev->background_radar_chandef)) |
84158164 LB |
810 | return false; |
811 | ||
7b0a0e3c JB |
812 | return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel, |
813 | false); | |
84158164 LB |
814 | } |
815 | ||
89766727 VT |
816 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
817 | struct ieee80211_channel *chan) | |
818 | { | |
819 | struct cfg80211_registered_device *rdev; | |
820 | ||
821 | ASSERT_RTNL(); | |
822 | ||
823 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
824 | return false; | |
825 | ||
826 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
827 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
828 | continue; | |
829 | ||
830 | if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan)) | |
831 | return true; | |
84158164 LB |
832 | |
833 | if (cfg80211_offchan_chain_is_active(rdev, chan)) | |
834 | return true; | |
89766727 VT |
835 | } |
836 | ||
837 | return false; | |
838 | } | |
839 | ||
6bc54fbc JD |
840 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
841 | u32 center_freq, | |
842 | u32 bandwidth) | |
3d9d1d66 JB |
843 | { |
844 | struct ieee80211_channel *c; | |
2f301ab2 | 845 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
846 | bool dfs_offload; |
847 | ||
848 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
849 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 850 | |
40d1ba63 JD |
851 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
852 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 853 | |
6bc54fbc JD |
854 | /* |
855 | * Check entire range of channels for the bandwidth. | |
856 | * If any channel in between is disabled or has not | |
857 | * had gone through CAC return false | |
858 | */ | |
934f4c7d TP |
859 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
860 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
861 | if (!c) |
862 | return false; | |
863 | ||
6bc54fbc JD |
864 | if (c->flags & IEEE80211_CHAN_DISABLED) |
865 | return false; | |
866 | ||
2c390e44 DL |
867 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
868 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
869 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 870 | return false; |
6bc54fbc JD |
871 | } |
872 | ||
873 | return true; | |
874 | } | |
875 | ||
876 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
877 | const struct cfg80211_chan_def *chandef) | |
878 | { | |
879 | int width; | |
880 | int r; | |
881 | ||
882 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
883 | return false; | |
884 | ||
885 | width = cfg80211_chandef_get_width(chandef); | |
886 | if (width < 0) | |
887 | return false; | |
888 | ||
934f4c7d TP |
889 | r = cfg80211_get_chans_dfs_available(wiphy, |
890 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
891 | width); |
892 | ||
893 | /* If any of channels unavailable for cf1 just return */ | |
894 | if (!r) | |
895 | return r; | |
896 | ||
897 | switch (chandef->width) { | |
898 | case NL80211_CHAN_WIDTH_80P80: | |
899 | WARN_ON(!chandef->center_freq2); | |
900 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
901 | MHZ_TO_KHZ(chandef->center_freq2), |
902 | width); | |
680682d4 | 903 | break; |
6bc54fbc JD |
904 | default: |
905 | WARN_ON(chandef->center_freq2); | |
906 | break; | |
907 | } | |
908 | ||
909 | return r; | |
910 | } | |
911 | ||
31559f35 JD |
912 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
913 | u32 center_freq, | |
914 | u32 bandwidth) | |
915 | { | |
916 | struct ieee80211_channel *c; | |
917 | u32 start_freq, end_freq, freq; | |
918 | unsigned int dfs_cac_ms = 0; | |
919 | ||
920 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
921 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
922 | ||
934f4c7d TP |
923 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
924 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
925 | if (!c) |
926 | return 0; | |
927 | ||
928 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
929 | return 0; | |
930 | ||
931 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
932 | continue; | |
933 | ||
934 | if (c->dfs_cac_ms > dfs_cac_ms) | |
935 | dfs_cac_ms = c->dfs_cac_ms; | |
936 | } | |
937 | ||
938 | return dfs_cac_ms; | |
939 | } | |
940 | ||
941 | unsigned int | |
942 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
943 | const struct cfg80211_chan_def *chandef) | |
944 | { | |
945 | int width; | |
946 | unsigned int t1 = 0, t2 = 0; | |
947 | ||
948 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
949 | return 0; | |
950 | ||
951 | width = cfg80211_chandef_get_width(chandef); | |
952 | if (width < 0) | |
953 | return 0; | |
954 | ||
955 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 956 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
957 | width); |
958 | ||
959 | if (!chandef->center_freq2) | |
960 | return t1; | |
961 | ||
962 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 963 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
964 | width); |
965 | ||
966 | return max(t1, t2); | |
967 | } | |
6bc54fbc JD |
968 | |
969 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
970 | u32 center_freq, u32 bandwidth, | |
971 | u32 prohibited_flags) | |
972 | { | |
973 | struct ieee80211_channel *c; | |
974 | u32 freq, start_freq, end_freq; | |
04f39047 | 975 | |
6bc54fbc JD |
976 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
977 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
978 | ||
934f4c7d TP |
979 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
980 | c = ieee80211_get_channel_khz(wiphy, freq); | |
6bc54fbc | 981 | if (!c || c->flags & prohibited_flags) |
3d9d1d66 | 982 | return false; |
9236d838 LR |
983 | } |
984 | ||
3d9d1d66 JB |
985 | return true; |
986 | } | |
987 | ||
2a38075c AAL |
988 | /* check if the operating channels are valid and supported */ |
989 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
990 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
991 | int primary_channel, | |
992 | struct ieee80211_edmg *edmg_cap) | |
993 | { | |
994 | struct ieee80211_channel *chan; | |
995 | int i, freq; | |
996 | int channels_counter = 0; | |
997 | ||
998 | if (!edmg_channels && !edmg_bw_config) | |
999 | return true; | |
1000 | ||
1001 | if ((!edmg_channels && edmg_bw_config) || | |
1002 | (edmg_channels && !edmg_bw_config)) | |
1003 | return false; | |
1004 | ||
1005 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
1006 | return false; | |
1007 | ||
1008 | /* 60GHz channels 1..6 */ | |
1009 | for (i = 0; i < 6; i++) { | |
1010 | if (!(edmg_channels & BIT(i))) | |
1011 | continue; | |
1012 | ||
1013 | if (!(edmg_cap->channels & BIT(i))) | |
1014 | return false; | |
1015 | ||
1016 | channels_counter++; | |
1017 | ||
1018 | freq = ieee80211_channel_to_frequency(i + 1, | |
1019 | NL80211_BAND_60GHZ); | |
1020 | chan = ieee80211_get_channel(wiphy, freq); | |
1021 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
1022 | return false; | |
1023 | } | |
1024 | ||
1025 | /* IEEE802.11 allows max 4 channels */ | |
1026 | if (channels_counter > 4) | |
1027 | return false; | |
1028 | ||
1029 | /* check bw_config is a subset of what driver supports | |
1030 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
1031 | */ | |
1032 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
1033 | return false; | |
1034 | ||
1035 | if (edmg_bw_config > edmg_cap->bw_config) | |
1036 | return false; | |
1037 | ||
1038 | return true; | |
1039 | } | |
1040 | ||
9f5e8f6e JB |
1041 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
1042 | const struct cfg80211_chan_def *chandef, | |
1043 | u32 prohibited_flags) | |
3d9d1d66 | 1044 | { |
9f5e8f6e JB |
1045 | struct ieee80211_sta_ht_cap *ht_cap; |
1046 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 1047 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 1048 | u32 width, control_freq, cap; |
3743bec6 JD |
1049 | bool ext_nss_cap, support_80_80 = false, support_320 = false; |
1050 | const struct ieee80211_sband_iftype_data *iftd; | |
1051 | struct ieee80211_supported_band *sband; | |
1052 | int i; | |
3d9d1d66 | 1053 | |
9f5e8f6e JB |
1054 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
1055 | return false; | |
3d9d1d66 | 1056 | |
9f5e8f6e JB |
1057 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
1058 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c | 1059 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
e6ed929b WG |
1060 | ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) & |
1061 | IEEE80211_VHT_EXT_NSS_BW_CAPABLE; | |
2a38075c AAL |
1062 | |
1063 | if (edmg_cap->channels && | |
1064 | !cfg80211_edmg_usable(wiphy, | |
1065 | chandef->edmg.channels, | |
1066 | chandef->edmg.bw_config, | |
1067 | chandef->chan->hw_value, | |
1068 | edmg_cap)) | |
1069 | return false; | |
3d9d1d66 | 1070 | |
9f5e8f6e | 1071 | control_freq = chandef->chan->center_freq; |
9236d838 | 1072 | |
3d9d1d66 | 1073 | switch (chandef->width) { |
df78a0c0 TP |
1074 | case NL80211_CHAN_WIDTH_1: |
1075 | width = 1; | |
1076 | break; | |
1077 | case NL80211_CHAN_WIDTH_2: | |
1078 | width = 2; | |
1079 | break; | |
1080 | case NL80211_CHAN_WIDTH_4: | |
1081 | width = 4; | |
1082 | break; | |
1083 | case NL80211_CHAN_WIDTH_8: | |
1084 | width = 8; | |
1085 | break; | |
1086 | case NL80211_CHAN_WIDTH_16: | |
1087 | width = 16; | |
1088 | break; | |
2f301ab2 SW |
1089 | case NL80211_CHAN_WIDTH_5: |
1090 | width = 5; | |
1091 | break; | |
1092 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 1093 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
1094 | width = 10; |
1095 | break; | |
3d9d1d66 | 1096 | case NL80211_CHAN_WIDTH_20: |
ba8f6a03 JB |
1097 | if (!ht_cap->ht_supported && |
1098 | chandef->chan->band != NL80211_BAND_6GHZ) | |
9f5e8f6e | 1099 | return false; |
df561f66 | 1100 | fallthrough; |
9f5e8f6e | 1101 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 1102 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
1103 | width = 20; |
1104 | break; | |
1105 | case NL80211_CHAN_WIDTH_40: | |
1106 | width = 40; | |
ba8f6a03 JB |
1107 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1108 | break; | |
9f5e8f6e JB |
1109 | if (!ht_cap->ht_supported) |
1110 | return false; | |
1111 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
1112 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
1113 | return false; | |
1114 | if (chandef->center_freq1 < control_freq && | |
1115 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
1116 | return false; | |
1117 | if (chandef->center_freq1 > control_freq && | |
1118 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
1119 | return false; | |
3d9d1d66 | 1120 | break; |
3d9d1d66 | 1121 | case NL80211_CHAN_WIDTH_80P80: |
35799944 SB |
1122 | cap = vht_cap->cap; |
1123 | support_80_80 = | |
1124 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || | |
1125 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
1126 | cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || | |
e6ed929b WG |
1127 | (ext_nss_cap && |
1128 | u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1); | |
35799944 | 1129 | if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80) |
9f5e8f6e | 1130 | return false; |
df561f66 | 1131 | fallthrough; |
9f5e8f6e | 1132 | case NL80211_CHAN_WIDTH_80: |
c7a6ee27 | 1133 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 | 1134 | width = 80; |
ba8f6a03 JB |
1135 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1136 | break; | |
1137 | if (!vht_cap->vht_supported) | |
1138 | return false; | |
3d9d1d66 JB |
1139 | break; |
1140 | case NL80211_CHAN_WIDTH_160: | |
ba8f6a03 JB |
1141 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
1142 | width = 160; | |
1143 | if (chandef->chan->band == NL80211_BAND_6GHZ) | |
1144 | break; | |
9f5e8f6e JB |
1145 | if (!vht_cap->vht_supported) |
1146 | return false; | |
08f6f147 JM |
1147 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
1148 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
35799944 | 1149 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ && |
e6ed929b WG |
1150 | !(ext_nss_cap && |
1151 | (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) | |
9f5e8f6e | 1152 | return false; |
3d9d1d66 | 1153 | break; |
3743bec6 JD |
1154 | case NL80211_CHAN_WIDTH_320: |
1155 | prohibited_flags |= IEEE80211_CHAN_NO_320MHZ; | |
1156 | width = 320; | |
1157 | ||
1158 | if (chandef->chan->band != NL80211_BAND_6GHZ) | |
1159 | return false; | |
1160 | ||
1161 | sband = wiphy->bands[NL80211_BAND_6GHZ]; | |
1162 | if (!sband) | |
1163 | return false; | |
1164 | ||
1165 | for (i = 0; i < sband->n_iftype_data; i++) { | |
1166 | iftd = &sband->iftype_data[i]; | |
1167 | if (!iftd->eht_cap.has_eht) | |
1168 | continue; | |
1169 | ||
1170 | if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] & | |
1171 | IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) { | |
1172 | support_320 = true; | |
1173 | break; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | if (!support_320) | |
1178 | return false; | |
1179 | break; | |
3d9d1d66 JB |
1180 | default: |
1181 | WARN_ON_ONCE(1); | |
9236d838 | 1182 | return false; |
4ee3e063 | 1183 | } |
3d9d1d66 | 1184 | |
c7a6ee27 JB |
1185 | /* |
1186 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
1187 | * allowed by the driver, or only certain combinations? | |
1188 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
1189 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
1190 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
1191 | * no way to cover 80+80 MHz or more complex restrictions. | |
1192 | * Note that such restrictions also need to be advertised to | |
1193 | * userspace, for example for P2P channel selection. | |
1194 | */ | |
9f5e8f6e | 1195 | |
a6662dba JB |
1196 | if (width > 20) |
1197 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1198 | ||
2f301ab2 SW |
1199 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
1200 | if (width < 20) | |
1201 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1202 | ||
1203 | ||
934f4c7d TP |
1204 | if (!cfg80211_secondary_chans_ok(wiphy, |
1205 | ieee80211_chandef_to_khz(chandef), | |
9f5e8f6e JB |
1206 | width, prohibited_flags)) |
1207 | return false; | |
1208 | ||
1209 | if (!chandef->center_freq2) | |
1210 | return true; | |
934f4c7d TP |
1211 | return cfg80211_secondary_chans_ok(wiphy, |
1212 | MHZ_TO_KHZ(chandef->center_freq2), | |
9f5e8f6e JB |
1213 | width, prohibited_flags); |
1214 | } | |
1215 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
1216 | ||
7b0a0e3c JB |
1217 | static bool cfg80211_ir_permissive_check_wdev(enum nl80211_iftype iftype, |
1218 | struct wireless_dev *wdev, | |
1219 | struct ieee80211_channel *chan) | |
1220 | { | |
1221 | struct ieee80211_channel *other_chan = NULL; | |
1222 | unsigned int link_id; | |
1223 | int r1, r2; | |
1224 | ||
1225 | for_each_valid_link(wdev, link_id) { | |
1226 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1227 | wdev->links[link_id].client.current_bss) | |
1228 | other_chan = wdev->links[link_id].client.current_bss->pub.channel; | |
1229 | ||
1230 | /* | |
1231 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1232 | * this one (maybe the same one) can beacon as well. We allow | |
1233 | * the operation even if the station we relied on with | |
1234 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1235 | * we're not outdoor on an indoor-only channel. | |
1236 | */ | |
1237 | if (iftype == NL80211_IFTYPE_P2P_GO && | |
1238 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
1239 | wdev->links[link_id].ap.beacon_interval && | |
1240 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1241 | other_chan = wdev->links[link_id].ap.chandef.chan; | |
1242 | ||
1243 | if (!other_chan) | |
1244 | continue; | |
1245 | ||
1246 | if (chan == other_chan) | |
1247 | return true; | |
1248 | ||
1249 | if (chan->band != NL80211_BAND_5GHZ && | |
1250 | chan->band != NL80211_BAND_6GHZ) | |
1251 | continue; | |
1252 | ||
1253 | r1 = cfg80211_get_unii(chan->center_freq); | |
1254 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1255 | ||
1256 | if (r1 != -EINVAL && r1 == r2) { | |
1257 | /* | |
1258 | * At some locations channels 149-165 are considered a | |
1259 | * bundle, but at other locations, e.g., Indonesia, | |
1260 | * channels 149-161 are considered a bundle while | |
1261 | * channel 165 is left out and considered to be in a | |
1262 | * different bundle. Thus, in case that there is a | |
1263 | * station interface connected to an AP on channel 165, | |
1264 | * it is assumed that channels 149-161 are allowed for | |
1265 | * GO operations. However, having a station interface | |
1266 | * connected to an AP on channels 149-161, does not | |
1267 | * allow GO operation on channel 165. | |
1268 | */ | |
1269 | if (chan->center_freq == 5825 && | |
1270 | other_chan->center_freq != 5825) | |
1271 | continue; | |
1272 | return true; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | return false; | |
1277 | } | |
1278 | ||
174e0cd2 | 1279 | /* |
06f207fc AN |
1280 | * Check if the channel can be used under permissive conditions mandated by |
1281 | * some regulatory bodies, i.e., the channel is marked with | |
1282 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1283 | * associated to an AP on the same channel or on the same UNII band |
1284 | * (assuming that the AP is an authorized master). | |
06f207fc | 1285 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1286 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1287 | */ |
06f207fc AN |
1288 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1289 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1290 | struct ieee80211_channel *chan) |
1291 | { | |
be69c24a | 1292 | struct wireless_dev *wdev; |
06f207fc | 1293 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 | 1294 | |
a05829a7 | 1295 | lockdep_assert_held(&rdev->wiphy.mtx); |
174e0cd2 | 1296 | |
97f2645f | 1297 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1298 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1299 | return false; | |
1300 | ||
06f207fc AN |
1301 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1302 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1303 | iftype != NL80211_IFTYPE_STATION && | |
1304 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1305 | return false; | |
1306 | ||
c8866e55 IP |
1307 | if (regulatory_indoor_allowed() && |
1308 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1309 | return true; | |
1310 | ||
06f207fc | 1311 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1312 | return false; |
1313 | ||
1314 | /* | |
1315 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1316 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1317 | * enforce the relaxation (by doing a similar verifications as this), |
1318 | * and thus fail the GO instantiation, consider only the interfaces of | |
1319 | * the current registered device. | |
1320 | */ | |
53873f13 | 1321 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
7b0a0e3c | 1322 | bool ret; |
174e0cd2 | 1323 | |
be69c24a | 1324 | wdev_lock(wdev); |
7b0a0e3c | 1325 | ret = cfg80211_ir_permissive_check_wdev(iftype, wdev, chan); |
be69c24a | 1326 | wdev_unlock(wdev); |
174e0cd2 | 1327 | |
7b0a0e3c JB |
1328 | if (ret) |
1329 | return ret; | |
174e0cd2 IP |
1330 | } |
1331 | ||
1332 | return false; | |
1333 | } | |
1334 | ||
923b352f AN |
1335 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1336 | struct cfg80211_chan_def *chandef, | |
1337 | enum nl80211_iftype iftype, | |
1338 | bool check_no_ir) | |
9f5e8f6e JB |
1339 | { |
1340 | bool res; | |
6bc54fbc | 1341 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED | |
6bc54fbc | 1342 | IEEE80211_CHAN_RADAR; |
9f5e8f6e | 1343 | |
923b352f | 1344 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1345 | |
923b352f | 1346 | if (check_no_ir) |
174e0cd2 | 1347 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1348 | |
00ec75fc | 1349 | if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && |
6bc54fbc JD |
1350 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1351 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1352 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1353 | } | |
1354 | ||
1355 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1356 | |
1357 | trace_cfg80211_return_bool(res); | |
1358 | return res; | |
9236d838 | 1359 | } |
923b352f AN |
1360 | |
1361 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1362 | struct cfg80211_chan_def *chandef, | |
1363 | enum nl80211_iftype iftype) | |
1364 | { | |
1365 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1366 | } | |
683b6d3b | 1367 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1368 | |
923b352f AN |
1369 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1370 | struct cfg80211_chan_def *chandef, | |
1371 | enum nl80211_iftype iftype) | |
1372 | { | |
a05829a7 | 1373 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
923b352f AN |
1374 | bool check_no_ir; |
1375 | ||
a05829a7 | 1376 | lockdep_assert_held(&rdev->wiphy.mtx); |
923b352f AN |
1377 | |
1378 | /* | |
1379 | * Under certain conditions suggested by some regulatory bodies a | |
1380 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1381 | * only if such relaxations are not enabled and the conditions are not | |
1382 | * met. | |
1383 | */ | |
1384 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1385 | chandef->chan); | |
1386 | ||
1387 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1388 | } | |
1389 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1390 | ||
e8c9bd5b | 1391 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1392 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1393 | { |
e8c9bd5b | 1394 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1395 | return -EOPNOTSUPP; |
4f03c1ed MK |
1396 | if (!cfg80211_has_monitors_only(rdev)) |
1397 | return -EBUSY; | |
9588bbd5 | 1398 | |
683b6d3b | 1399 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1400 | } |
26ab9a0c | 1401 | |
be989891 JB |
1402 | bool cfg80211_any_usable_channels(struct wiphy *wiphy, |
1403 | unsigned long sband_mask, | |
1404 | u32 prohibited_flags) | |
1405 | { | |
1406 | int idx; | |
1407 | ||
1408 | prohibited_flags |= IEEE80211_CHAN_DISABLED; | |
1409 | ||
1410 | for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) { | |
1411 | struct ieee80211_supported_band *sband = wiphy->bands[idx]; | |
1412 | int chanidx; | |
1413 | ||
1414 | if (!sband) | |
1415 | continue; | |
1416 | ||
1417 | for (chanidx = 0; chanidx < sband->n_channels; chanidx++) { | |
1418 | struct ieee80211_channel *chan; | |
1419 | ||
1420 | chan = &sband->channels[chanidx]; | |
1421 | ||
1422 | if (chan->flags & prohibited_flags) | |
1423 | continue; | |
1424 | ||
1425 | return true; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | return false; | |
1430 | } | |
1431 | EXPORT_SYMBOL(cfg80211_any_usable_channels); | |
7b0a0e3c JB |
1432 | |
1433 | struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev, | |
1434 | unsigned int link_id) | |
1435 | { | |
31177127 JB |
1436 | /* |
1437 | * We need to sort out the locking here - in some cases | |
1438 | * where we get here we really just don't care (yet) | |
1439 | * about the valid links, but in others we do. But we | |
1440 | * get here with various driver cases, so we cannot | |
1441 | * easily require the wdev mutex. | |
1442 | */ | |
1443 | if (link_id || wdev->valid_links & BIT(0)) { | |
1444 | ASSERT_WDEV_LOCK(wdev); | |
1445 | WARN_ON(!(wdev->valid_links & BIT(link_id))); | |
1446 | } | |
7b0a0e3c JB |
1447 | |
1448 | switch (wdev->iftype) { | |
1449 | case NL80211_IFTYPE_MESH_POINT: | |
1450 | return &wdev->u.mesh.chandef; | |
1451 | case NL80211_IFTYPE_ADHOC: | |
1452 | return &wdev->u.ibss.chandef; | |
1453 | case NL80211_IFTYPE_OCB: | |
1454 | return &wdev->u.ocb.chandef; | |
1455 | case NL80211_IFTYPE_AP: | |
1456 | case NL80211_IFTYPE_P2P_GO: | |
1457 | return &wdev->links[link_id].ap.chandef; | |
1458 | default: | |
1459 | return NULL; | |
1460 | } | |
1461 | } | |
1462 | EXPORT_SYMBOL(wdev_chandef); |