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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 |
ba8f6a03 | 9 | * Copyright 2018-2020 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; | |
184 | default: | |
185 | WARN_ON_ONCE(1); | |
186 | return -1; | |
187 | } | |
188 | return mhz; | |
189 | } | |
190 | ||
191 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) | |
192 | { | |
193 | return nl80211_chan_width_to_mhz(c->width); | |
194 | } | |
195 | ||
9f5e8f6e | 196 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 | 197 | { |
11b34737 TP |
198 | u32 control_freq, oper_freq; |
199 | int oper_width, control_width; | |
3d9d1d66 JB |
200 | |
201 | if (!chandef->chan) | |
202 | return false; | |
203 | ||
be689f68 JB |
204 | if (chandef->freq1_offset >= 1000) |
205 | return false; | |
206 | ||
3d9d1d66 JB |
207 | control_freq = chandef->chan->center_freq; |
208 | ||
209 | switch (chandef->width) { | |
2f301ab2 SW |
210 | case NL80211_CHAN_WIDTH_5: |
211 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
212 | case NL80211_CHAN_WIDTH_20: |
213 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
214 | if (ieee80211_chandef_to_khz(chandef) != |
215 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
216 | return false; |
217 | if (chandef->center_freq2) | |
218 | return false; | |
219 | break; | |
c1cd35c6 | 220 | case NL80211_CHAN_WIDTH_1: |
11b34737 TP |
221 | case NL80211_CHAN_WIDTH_2: |
222 | case NL80211_CHAN_WIDTH_4: | |
223 | case NL80211_CHAN_WIDTH_8: | |
224 | case NL80211_CHAN_WIDTH_16: | |
c1cd35c6 TP |
225 | if (chandef->chan->band != NL80211_BAND_S1GHZ) |
226 | return false; | |
227 | ||
11b34737 TP |
228 | control_freq = ieee80211_channel_to_khz(chandef->chan); |
229 | oper_freq = ieee80211_chandef_to_khz(chandef); | |
230 | control_width = nl80211_chan_width_to_mhz( | |
231 | ieee80211_s1g_channel_width( | |
232 | chandef->chan)); | |
233 | oper_width = cfg80211_chandef_get_width(chandef); | |
234 | ||
235 | if (oper_width < 0 || control_width < 0) | |
236 | return false; | |
237 | if (chandef->center_freq2) | |
238 | return false; | |
239 | ||
240 | if (control_freq + MHZ_TO_KHZ(control_width) / 2 > | |
241 | oper_freq + MHZ_TO_KHZ(oper_width) / 2) | |
242 | return false; | |
243 | ||
244 | if (control_freq - MHZ_TO_KHZ(control_width) / 2 < | |
245 | oper_freq - MHZ_TO_KHZ(oper_width) / 2) | |
246 | return false; | |
247 | break; | |
3d9d1d66 JB |
248 | case NL80211_CHAN_WIDTH_40: |
249 | if (chandef->center_freq1 != control_freq + 10 && | |
250 | chandef->center_freq1 != control_freq - 10) | |
251 | return false; | |
252 | if (chandef->center_freq2) | |
253 | return false; | |
254 | break; | |
255 | case NL80211_CHAN_WIDTH_80P80: | |
256 | if (chandef->center_freq1 != control_freq + 30 && | |
257 | chandef->center_freq1 != control_freq + 10 && | |
258 | chandef->center_freq1 != control_freq - 10 && | |
259 | chandef->center_freq1 != control_freq - 30) | |
260 | return false; | |
261 | if (!chandef->center_freq2) | |
262 | return false; | |
9cab3151 JB |
263 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
264 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
265 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
266 | return false; | |
3d9d1d66 JB |
267 | break; |
268 | case NL80211_CHAN_WIDTH_80: | |
269 | if (chandef->center_freq1 != control_freq + 30 && | |
270 | chandef->center_freq1 != control_freq + 10 && | |
271 | chandef->center_freq1 != control_freq - 10 && | |
272 | chandef->center_freq1 != control_freq - 30) | |
273 | return false; | |
274 | if (chandef->center_freq2) | |
275 | return false; | |
276 | break; | |
277 | case NL80211_CHAN_WIDTH_160: | |
278 | if (chandef->center_freq1 != control_freq + 70 && | |
279 | chandef->center_freq1 != control_freq + 50 && | |
280 | chandef->center_freq1 != control_freq + 30 && | |
281 | chandef->center_freq1 != control_freq + 10 && | |
282 | chandef->center_freq1 != control_freq - 10 && | |
283 | chandef->center_freq1 != control_freq - 30 && | |
284 | chandef->center_freq1 != control_freq - 50 && | |
285 | chandef->center_freq1 != control_freq - 70) | |
286 | return false; | |
287 | if (chandef->center_freq2) | |
288 | return false; | |
289 | break; | |
290 | default: | |
291 | return false; | |
292 | } | |
293 | ||
ec649fed MH |
294 | /* channel 14 is only for IEEE 802.11b */ |
295 | if (chandef->center_freq1 == 2484 && | |
296 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
297 | return false; | |
298 | ||
2a38075c AAL |
299 | if (cfg80211_chandef_is_edmg(chandef) && |
300 | !cfg80211_edmg_chandef_valid(chandef)) | |
301 | return false; | |
302 | ||
3d9d1d66 JB |
303 | return true; |
304 | } | |
9f5e8f6e | 305 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
306 | |
307 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
fc1f48ff | 308 | u32 *pri40, u32 *pri80) |
3d9d1d66 JB |
309 | { |
310 | int tmp; | |
311 | ||
312 | switch (c->width) { | |
313 | case NL80211_CHAN_WIDTH_40: | |
314 | *pri40 = c->center_freq1; | |
315 | *pri80 = 0; | |
316 | break; | |
317 | case NL80211_CHAN_WIDTH_80: | |
318 | case NL80211_CHAN_WIDTH_80P80: | |
319 | *pri80 = c->center_freq1; | |
320 | /* n_P20 */ | |
321 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
322 | /* n_P40 */ | |
323 | tmp /= 2; | |
324 | /* freq_P40 */ | |
325 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
326 | break; | |
327 | case NL80211_CHAN_WIDTH_160: | |
328 | /* n_P20 */ | |
329 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
330 | /* n_P40 */ | |
331 | tmp /= 2; | |
332 | /* freq_P40 */ | |
333 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
334 | /* n_P80 */ | |
335 | tmp /= 2; | |
336 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
337 | break; | |
338 | default: | |
339 | WARN_ON_ONCE(1); | |
340 | } | |
341 | } | |
342 | ||
343 | const struct cfg80211_chan_def * | |
344 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
345 | const struct cfg80211_chan_def *c2) | |
346 | { | |
347 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80; | |
348 | ||
349 | /* If they are identical, return */ | |
350 | if (cfg80211_chandef_identical(c1, c2)) | |
351 | return c1; | |
352 | ||
353 | /* otherwise, must have same control channel */ | |
354 | if (c1->chan != c2->chan) | |
355 | return NULL; | |
356 | ||
357 | /* | |
358 | * If they have the same width, but aren't identical, | |
359 | * then they can't be compatible. | |
360 | */ | |
361 | if (c1->width == c2->width) | |
362 | return NULL; | |
363 | ||
2f301ab2 SW |
364 | /* |
365 | * can't be compatible if one of them is 5 or 10 MHz, | |
366 | * but they don't have the same width. | |
367 | */ | |
368 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
369 | c1->width == NL80211_CHAN_WIDTH_10 || | |
370 | c2->width == NL80211_CHAN_WIDTH_5 || | |
371 | c2->width == NL80211_CHAN_WIDTH_10) | |
372 | return NULL; | |
373 | ||
3d9d1d66 JB |
374 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
375 | c1->width == NL80211_CHAN_WIDTH_20) | |
376 | return c2; | |
377 | ||
378 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
379 | c2->width == NL80211_CHAN_WIDTH_20) | |
380 | return c1; | |
381 | ||
382 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80); | |
383 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80); | |
384 | ||
385 | if (c1_pri40 != c2_pri40) | |
386 | return NULL; | |
387 | ||
388 | WARN_ON(!c1_pri80 && !c2_pri80); | |
389 | if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80) | |
390 | return NULL; | |
391 | ||
392 | if (c1->width > c2->width) | |
393 | return c1; | |
394 | return c2; | |
395 | } | |
396 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
397 | ||
04f39047 SW |
398 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
399 | u32 bandwidth, | |
400 | enum nl80211_dfs_state dfs_state) | |
401 | { | |
402 | struct ieee80211_channel *c; | |
403 | u32 freq; | |
404 | ||
405 | for (freq = center_freq - bandwidth/2 + 10; | |
406 | freq <= center_freq + bandwidth/2 - 10; | |
407 | freq += 20) { | |
408 | c = ieee80211_get_channel(wiphy, freq); | |
409 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
410 | continue; | |
411 | ||
412 | c->dfs_state = dfs_state; | |
413 | c->dfs_state_entered = jiffies; | |
414 | } | |
415 | } | |
416 | ||
417 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
418 | const struct cfg80211_chan_def *chandef, | |
419 | enum nl80211_dfs_state dfs_state) | |
420 | { | |
421 | int width; | |
422 | ||
423 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
424 | return; | |
425 | ||
426 | width = cfg80211_chandef_get_width(chandef); | |
427 | if (width < 0) | |
428 | return; | |
429 | ||
430 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
431 | width, dfs_state); | |
432 | ||
433 | if (!chandef->center_freq2) | |
434 | return; | |
435 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
436 | width, dfs_state); | |
437 | } | |
438 | ||
40d1ba63 JD |
439 | static u32 cfg80211_get_start_freq(u32 center_freq, |
440 | u32 bandwidth) | |
441 | { | |
442 | u32 start_freq; | |
443 | ||
934f4c7d TP |
444 | bandwidth = MHZ_TO_KHZ(bandwidth); |
445 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
446 | start_freq = center_freq; |
447 | else | |
934f4c7d | 448 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
449 | |
450 | return start_freq; | |
451 | } | |
452 | ||
453 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
454 | u32 bandwidth) | |
455 | { | |
456 | u32 end_freq; | |
457 | ||
934f4c7d TP |
458 | bandwidth = MHZ_TO_KHZ(bandwidth); |
459 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
460 | end_freq = center_freq; |
461 | else | |
934f4c7d | 462 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
463 | |
464 | return end_freq; | |
465 | } | |
466 | ||
04f39047 SW |
467 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
468 | u32 center_freq, | |
469 | u32 bandwidth) | |
470 | { | |
471 | struct ieee80211_channel *c; | |
2f301ab2 SW |
472 | u32 freq, start_freq, end_freq; |
473 | ||
40d1ba63 JD |
474 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
475 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 476 | |
934f4c7d TP |
477 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
478 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
479 | if (!c) |
480 | return -EINVAL; | |
481 | ||
482 | if (c->flags & IEEE80211_CHAN_RADAR) | |
483 | return 1; | |
484 | } | |
485 | return 0; | |
486 | } | |
487 | ||
488 | ||
489 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
490 | const struct cfg80211_chan_def *chandef, |
491 | enum nl80211_iftype iftype) | |
04f39047 SW |
492 | { |
493 | int width; | |
2beb6dab | 494 | int ret; |
04f39047 SW |
495 | |
496 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
497 | return -EINVAL; | |
498 | ||
2beb6dab LC |
499 | switch (iftype) { |
500 | case NL80211_IFTYPE_ADHOC: | |
501 | case NL80211_IFTYPE_AP: | |
502 | case NL80211_IFTYPE_P2P_GO: | |
503 | case NL80211_IFTYPE_MESH_POINT: | |
504 | width = cfg80211_chandef_get_width(chandef); | |
505 | if (width < 0) | |
506 | return -EINVAL; | |
04f39047 | 507 | |
2beb6dab | 508 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d TP |
509 | ieee80211_chandef_to_khz(chandef), |
510 | width); | |
2beb6dab LC |
511 | if (ret < 0) |
512 | return ret; | |
513 | else if (ret > 0) | |
514 | return BIT(chandef->width); | |
04f39047 | 515 | |
2beb6dab LC |
516 | if (!chandef->center_freq2) |
517 | return 0; | |
518 | ||
519 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d TP |
520 | MHZ_TO_KHZ(chandef->center_freq2), |
521 | width); | |
2beb6dab LC |
522 | if (ret < 0) |
523 | return ret; | |
524 | else if (ret > 0) | |
525 | return BIT(chandef->width); | |
04f39047 | 526 | |
2beb6dab LC |
527 | break; |
528 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 529 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
530 | case NL80211_IFTYPE_P2P_CLIENT: |
531 | case NL80211_IFTYPE_MONITOR: | |
532 | case NL80211_IFTYPE_AP_VLAN: | |
2beb6dab | 533 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 534 | case NL80211_IFTYPE_NAN: |
2beb6dab | 535 | break; |
e7e0517c | 536 | case NL80211_IFTYPE_WDS: |
00ec75fc | 537 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
538 | case NUM_NL80211_IFTYPES: |
539 | WARN_ON(1); | |
540 | } | |
541 | ||
542 | return 0; | |
04f39047 | 543 | } |
774f0734 | 544 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 545 | |
fe7c3a1f JD |
546 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
547 | u32 center_freq, | |
548 | u32 bandwidth) | |
549 | { | |
550 | struct ieee80211_channel *c; | |
551 | u32 freq, start_freq, end_freq; | |
552 | int count = 0; | |
553 | ||
554 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
555 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
556 | ||
557 | /* | |
558 | * Check entire range of channels for the bandwidth. | |
559 | * Check all channels are DFS channels (DFS_USABLE or | |
560 | * DFS_AVAILABLE). Return number of usable channels | |
561 | * (require CAC). Allow DFS and non-DFS channel mix. | |
562 | */ | |
934f4c7d TP |
563 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
564 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
565 | if (!c) |
566 | return -EINVAL; | |
567 | ||
568 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
569 | return -EINVAL; | |
570 | ||
571 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
572 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
573 | return -EINVAL; | |
574 | ||
575 | if (c->dfs_state == NL80211_DFS_USABLE) | |
576 | count++; | |
577 | } | |
578 | } | |
579 | ||
580 | return count; | |
581 | } | |
582 | ||
583 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
584 | const struct cfg80211_chan_def *chandef) | |
585 | { | |
586 | int width; | |
587 | int r1, r2 = 0; | |
588 | ||
589 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
590 | return false; | |
591 | ||
592 | width = cfg80211_chandef_get_width(chandef); | |
593 | if (width < 0) | |
594 | return false; | |
595 | ||
934f4c7d TP |
596 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
597 | MHZ_TO_KHZ(chandef->center_freq1), | |
598 | width); | |
fe7c3a1f JD |
599 | |
600 | if (r1 < 0) | |
601 | return false; | |
602 | ||
603 | switch (chandef->width) { | |
604 | case NL80211_CHAN_WIDTH_80P80: | |
605 | WARN_ON(!chandef->center_freq2); | |
606 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
607 | MHZ_TO_KHZ(chandef->center_freq2), |
608 | width); | |
fe7c3a1f JD |
609 | if (r2 < 0) |
610 | return false; | |
611 | break; | |
612 | default: | |
613 | WARN_ON(chandef->center_freq2); | |
614 | break; | |
615 | } | |
616 | ||
617 | return (r1 + r2 > 0); | |
618 | } | |
619 | ||
b35a51c7 VT |
620 | /* |
621 | * Checks if center frequency of chan falls with in the bandwidth | |
622 | * range of chandef. | |
623 | */ | |
624 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
625 | struct ieee80211_channel *chan) | |
626 | { | |
627 | int width; | |
a67a4893 | 628 | u32 freq; |
b35a51c7 VT |
629 | |
630 | if (chandef->chan->center_freq == chan->center_freq) | |
631 | return true; | |
632 | ||
633 | width = cfg80211_chandef_get_width(chandef); | |
634 | if (width <= 20) | |
635 | return false; | |
636 | ||
b35a51c7 VT |
637 | for (freq = chandef->center_freq1 - width / 2 + 10; |
638 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
639 | if (chan->center_freq == freq) | |
640 | return true; | |
641 | } | |
642 | ||
643 | if (!chandef->center_freq2) | |
644 | return false; | |
645 | ||
646 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
647 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
648 | if (chan->center_freq == freq) | |
649 | return true; | |
650 | } | |
651 | ||
652 | return false; | |
653 | } | |
654 | ||
655 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
656 | { | |
657 | bool active = false; | |
658 | ||
659 | ASSERT_WDEV_LOCK(wdev); | |
660 | ||
661 | if (!wdev->chandef.chan) | |
662 | return false; | |
663 | ||
664 | switch (wdev->iftype) { | |
665 | case NL80211_IFTYPE_AP: | |
666 | case NL80211_IFTYPE_P2P_GO: | |
667 | active = wdev->beacon_interval != 0; | |
668 | break; | |
669 | case NL80211_IFTYPE_ADHOC: | |
670 | active = wdev->ssid_len != 0; | |
671 | break; | |
672 | case NL80211_IFTYPE_MESH_POINT: | |
673 | active = wdev->mesh_id_len != 0; | |
674 | break; | |
675 | case NL80211_IFTYPE_STATION: | |
676 | case NL80211_IFTYPE_OCB: | |
677 | case NL80211_IFTYPE_P2P_CLIENT: | |
678 | case NL80211_IFTYPE_MONITOR: | |
679 | case NL80211_IFTYPE_AP_VLAN: | |
b35a51c7 VT |
680 | case NL80211_IFTYPE_P2P_DEVICE: |
681 | /* Can NAN type be considered as beaconing interface? */ | |
682 | case NL80211_IFTYPE_NAN: | |
683 | break; | |
684 | case NL80211_IFTYPE_UNSPECIFIED: | |
e7e0517c | 685 | case NL80211_IFTYPE_WDS: |
b35a51c7 VT |
686 | case NUM_NL80211_IFTYPES: |
687 | WARN_ON(1); | |
688 | } | |
689 | ||
690 | return active; | |
691 | } | |
692 | ||
89766727 VT |
693 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
694 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
695 | { |
696 | struct wireless_dev *wdev; | |
697 | ||
b35a51c7 VT |
698 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
699 | wdev_lock(wdev); | |
700 | if (!cfg80211_beaconing_iface_active(wdev)) { | |
701 | wdev_unlock(wdev); | |
702 | continue; | |
703 | } | |
704 | ||
705 | if (cfg80211_is_sub_chan(&wdev->chandef, chan)) { | |
706 | wdev_unlock(wdev); | |
707 | return true; | |
708 | } | |
709 | wdev_unlock(wdev); | |
710 | } | |
711 | ||
712 | return false; | |
713 | } | |
fe7c3a1f | 714 | |
89766727 VT |
715 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
716 | struct ieee80211_channel *chan) | |
717 | { | |
718 | struct cfg80211_registered_device *rdev; | |
719 | ||
720 | ASSERT_RTNL(); | |
721 | ||
722 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
723 | return false; | |
724 | ||
725 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
726 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
727 | continue; | |
728 | ||
729 | if (cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan)) | |
730 | return true; | |
731 | } | |
732 | ||
733 | return false; | |
734 | } | |
735 | ||
6bc54fbc JD |
736 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
737 | u32 center_freq, | |
738 | u32 bandwidth) | |
3d9d1d66 JB |
739 | { |
740 | struct ieee80211_channel *c; | |
2f301ab2 | 741 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
742 | bool dfs_offload; |
743 | ||
744 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
745 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 746 | |
40d1ba63 JD |
747 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
748 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 749 | |
6bc54fbc JD |
750 | /* |
751 | * Check entire range of channels for the bandwidth. | |
752 | * If any channel in between is disabled or has not | |
753 | * had gone through CAC return false | |
754 | */ | |
934f4c7d TP |
755 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
756 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
757 | if (!c) |
758 | return false; | |
759 | ||
6bc54fbc JD |
760 | if (c->flags & IEEE80211_CHAN_DISABLED) |
761 | return false; | |
762 | ||
2c390e44 DL |
763 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
764 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
765 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 766 | return false; |
6bc54fbc JD |
767 | } |
768 | ||
769 | return true; | |
770 | } | |
771 | ||
772 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
773 | const struct cfg80211_chan_def *chandef) | |
774 | { | |
775 | int width; | |
776 | int r; | |
777 | ||
778 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
779 | return false; | |
780 | ||
781 | width = cfg80211_chandef_get_width(chandef); | |
782 | if (width < 0) | |
783 | return false; | |
784 | ||
934f4c7d TP |
785 | r = cfg80211_get_chans_dfs_available(wiphy, |
786 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
787 | width); |
788 | ||
789 | /* If any of channels unavailable for cf1 just return */ | |
790 | if (!r) | |
791 | return r; | |
792 | ||
793 | switch (chandef->width) { | |
794 | case NL80211_CHAN_WIDTH_80P80: | |
795 | WARN_ON(!chandef->center_freq2); | |
796 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
797 | MHZ_TO_KHZ(chandef->center_freq2), |
798 | width); | |
680682d4 | 799 | break; |
6bc54fbc JD |
800 | default: |
801 | WARN_ON(chandef->center_freq2); | |
802 | break; | |
803 | } | |
804 | ||
805 | return r; | |
806 | } | |
807 | ||
31559f35 JD |
808 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
809 | u32 center_freq, | |
810 | u32 bandwidth) | |
811 | { | |
812 | struct ieee80211_channel *c; | |
813 | u32 start_freq, end_freq, freq; | |
814 | unsigned int dfs_cac_ms = 0; | |
815 | ||
816 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
817 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
818 | ||
934f4c7d TP |
819 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
820 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
821 | if (!c) |
822 | return 0; | |
823 | ||
824 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
825 | return 0; | |
826 | ||
827 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
828 | continue; | |
829 | ||
830 | if (c->dfs_cac_ms > dfs_cac_ms) | |
831 | dfs_cac_ms = c->dfs_cac_ms; | |
832 | } | |
833 | ||
834 | return dfs_cac_ms; | |
835 | } | |
836 | ||
837 | unsigned int | |
838 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
839 | const struct cfg80211_chan_def *chandef) | |
840 | { | |
841 | int width; | |
842 | unsigned int t1 = 0, t2 = 0; | |
843 | ||
844 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
845 | return 0; | |
846 | ||
847 | width = cfg80211_chandef_get_width(chandef); | |
848 | if (width < 0) | |
849 | return 0; | |
850 | ||
851 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 852 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
853 | width); |
854 | ||
855 | if (!chandef->center_freq2) | |
856 | return t1; | |
857 | ||
858 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 859 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
860 | width); |
861 | ||
862 | return max(t1, t2); | |
863 | } | |
6bc54fbc JD |
864 | |
865 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
866 | u32 center_freq, u32 bandwidth, | |
867 | u32 prohibited_flags) | |
868 | { | |
869 | struct ieee80211_channel *c; | |
870 | u32 freq, start_freq, end_freq; | |
04f39047 | 871 | |
6bc54fbc JD |
872 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
873 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
874 | ||
934f4c7d TP |
875 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
876 | c = ieee80211_get_channel_khz(wiphy, freq); | |
6bc54fbc | 877 | if (!c || c->flags & prohibited_flags) |
3d9d1d66 | 878 | return false; |
9236d838 LR |
879 | } |
880 | ||
3d9d1d66 JB |
881 | return true; |
882 | } | |
883 | ||
2a38075c AAL |
884 | /* check if the operating channels are valid and supported */ |
885 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
886 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
887 | int primary_channel, | |
888 | struct ieee80211_edmg *edmg_cap) | |
889 | { | |
890 | struct ieee80211_channel *chan; | |
891 | int i, freq; | |
892 | int channels_counter = 0; | |
893 | ||
894 | if (!edmg_channels && !edmg_bw_config) | |
895 | return true; | |
896 | ||
897 | if ((!edmg_channels && edmg_bw_config) || | |
898 | (edmg_channels && !edmg_bw_config)) | |
899 | return false; | |
900 | ||
901 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
902 | return false; | |
903 | ||
904 | /* 60GHz channels 1..6 */ | |
905 | for (i = 0; i < 6; i++) { | |
906 | if (!(edmg_channels & BIT(i))) | |
907 | continue; | |
908 | ||
909 | if (!(edmg_cap->channels & BIT(i))) | |
910 | return false; | |
911 | ||
912 | channels_counter++; | |
913 | ||
914 | freq = ieee80211_channel_to_frequency(i + 1, | |
915 | NL80211_BAND_60GHZ); | |
916 | chan = ieee80211_get_channel(wiphy, freq); | |
917 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
918 | return false; | |
919 | } | |
920 | ||
921 | /* IEEE802.11 allows max 4 channels */ | |
922 | if (channels_counter > 4) | |
923 | return false; | |
924 | ||
925 | /* check bw_config is a subset of what driver supports | |
926 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
927 | */ | |
928 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
929 | return false; | |
930 | ||
931 | if (edmg_bw_config > edmg_cap->bw_config) | |
932 | return false; | |
933 | ||
934 | return true; | |
935 | } | |
936 | ||
9f5e8f6e JB |
937 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
938 | const struct cfg80211_chan_def *chandef, | |
939 | u32 prohibited_flags) | |
3d9d1d66 | 940 | { |
9f5e8f6e JB |
941 | struct ieee80211_sta_ht_cap *ht_cap; |
942 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 943 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 944 | u32 width, control_freq, cap; |
e6ed929b | 945 | bool ext_nss_cap, support_80_80 = false; |
3d9d1d66 | 946 | |
9f5e8f6e JB |
947 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
948 | return false; | |
3d9d1d66 | 949 | |
9f5e8f6e JB |
950 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
951 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c | 952 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
e6ed929b WG |
953 | ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) & |
954 | IEEE80211_VHT_EXT_NSS_BW_CAPABLE; | |
2a38075c AAL |
955 | |
956 | if (edmg_cap->channels && | |
957 | !cfg80211_edmg_usable(wiphy, | |
958 | chandef->edmg.channels, | |
959 | chandef->edmg.bw_config, | |
960 | chandef->chan->hw_value, | |
961 | edmg_cap)) | |
962 | return false; | |
3d9d1d66 | 963 | |
9f5e8f6e | 964 | control_freq = chandef->chan->center_freq; |
9236d838 | 965 | |
3d9d1d66 | 966 | switch (chandef->width) { |
df78a0c0 TP |
967 | case NL80211_CHAN_WIDTH_1: |
968 | width = 1; | |
969 | break; | |
970 | case NL80211_CHAN_WIDTH_2: | |
971 | width = 2; | |
972 | break; | |
973 | case NL80211_CHAN_WIDTH_4: | |
974 | width = 4; | |
975 | break; | |
976 | case NL80211_CHAN_WIDTH_8: | |
977 | width = 8; | |
978 | break; | |
979 | case NL80211_CHAN_WIDTH_16: | |
980 | width = 16; | |
981 | break; | |
2f301ab2 SW |
982 | case NL80211_CHAN_WIDTH_5: |
983 | width = 5; | |
984 | break; | |
985 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 986 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
987 | width = 10; |
988 | break; | |
3d9d1d66 | 989 | case NL80211_CHAN_WIDTH_20: |
ba8f6a03 JB |
990 | if (!ht_cap->ht_supported && |
991 | chandef->chan->band != NL80211_BAND_6GHZ) | |
9f5e8f6e | 992 | return false; |
df561f66 | 993 | fallthrough; |
9f5e8f6e | 994 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 995 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
996 | width = 20; |
997 | break; | |
998 | case NL80211_CHAN_WIDTH_40: | |
999 | width = 40; | |
ba8f6a03 JB |
1000 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1001 | break; | |
9f5e8f6e JB |
1002 | if (!ht_cap->ht_supported) |
1003 | return false; | |
1004 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
1005 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
1006 | return false; | |
1007 | if (chandef->center_freq1 < control_freq && | |
1008 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
1009 | return false; | |
1010 | if (chandef->center_freq1 > control_freq && | |
1011 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
1012 | return false; | |
3d9d1d66 | 1013 | break; |
3d9d1d66 | 1014 | case NL80211_CHAN_WIDTH_80P80: |
35799944 SB |
1015 | cap = vht_cap->cap; |
1016 | support_80_80 = | |
1017 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || | |
1018 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
1019 | cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || | |
e6ed929b WG |
1020 | (ext_nss_cap && |
1021 | u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1); | |
35799944 | 1022 | if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80) |
9f5e8f6e | 1023 | return false; |
df561f66 | 1024 | fallthrough; |
9f5e8f6e | 1025 | case NL80211_CHAN_WIDTH_80: |
c7a6ee27 | 1026 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 | 1027 | width = 80; |
ba8f6a03 JB |
1028 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1029 | break; | |
1030 | if (!vht_cap->vht_supported) | |
1031 | return false; | |
3d9d1d66 JB |
1032 | break; |
1033 | case NL80211_CHAN_WIDTH_160: | |
ba8f6a03 JB |
1034 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
1035 | width = 160; | |
1036 | if (chandef->chan->band == NL80211_BAND_6GHZ) | |
1037 | break; | |
9f5e8f6e JB |
1038 | if (!vht_cap->vht_supported) |
1039 | return false; | |
08f6f147 JM |
1040 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
1041 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
35799944 | 1042 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ && |
e6ed929b WG |
1043 | !(ext_nss_cap && |
1044 | (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) | |
9f5e8f6e | 1045 | return false; |
3d9d1d66 JB |
1046 | break; |
1047 | default: | |
1048 | WARN_ON_ONCE(1); | |
9236d838 | 1049 | return false; |
4ee3e063 | 1050 | } |
3d9d1d66 | 1051 | |
c7a6ee27 JB |
1052 | /* |
1053 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
1054 | * allowed by the driver, or only certain combinations? | |
1055 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
1056 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
1057 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
1058 | * no way to cover 80+80 MHz or more complex restrictions. | |
1059 | * Note that such restrictions also need to be advertised to | |
1060 | * userspace, for example for P2P channel selection. | |
1061 | */ | |
9f5e8f6e | 1062 | |
a6662dba JB |
1063 | if (width > 20) |
1064 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1065 | ||
2f301ab2 SW |
1066 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
1067 | if (width < 20) | |
1068 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1069 | ||
1070 | ||
934f4c7d TP |
1071 | if (!cfg80211_secondary_chans_ok(wiphy, |
1072 | ieee80211_chandef_to_khz(chandef), | |
9f5e8f6e JB |
1073 | width, prohibited_flags)) |
1074 | return false; | |
1075 | ||
1076 | if (!chandef->center_freq2) | |
1077 | return true; | |
934f4c7d TP |
1078 | return cfg80211_secondary_chans_ok(wiphy, |
1079 | MHZ_TO_KHZ(chandef->center_freq2), | |
9f5e8f6e JB |
1080 | width, prohibited_flags); |
1081 | } | |
1082 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
1083 | ||
174e0cd2 | 1084 | /* |
06f207fc AN |
1085 | * Check if the channel can be used under permissive conditions mandated by |
1086 | * some regulatory bodies, i.e., the channel is marked with | |
1087 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1088 | * associated to an AP on the same channel or on the same UNII band |
1089 | * (assuming that the AP is an authorized master). | |
06f207fc | 1090 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1091 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1092 | */ |
06f207fc AN |
1093 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1094 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1095 | struct ieee80211_channel *chan) |
1096 | { | |
be69c24a | 1097 | struct wireless_dev *wdev; |
06f207fc | 1098 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 | 1099 | |
a05829a7 | 1100 | lockdep_assert_held(&rdev->wiphy.mtx); |
174e0cd2 | 1101 | |
97f2645f | 1102 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1103 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1104 | return false; | |
1105 | ||
06f207fc AN |
1106 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1107 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1108 | iftype != NL80211_IFTYPE_STATION && | |
1109 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1110 | return false; | |
1111 | ||
c8866e55 IP |
1112 | if (regulatory_indoor_allowed() && |
1113 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1114 | return true; | |
1115 | ||
06f207fc | 1116 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1117 | return false; |
1118 | ||
1119 | /* | |
1120 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1121 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1122 | * enforce the relaxation (by doing a similar verifications as this), |
1123 | * and thus fail the GO instantiation, consider only the interfaces of | |
1124 | * the current registered device. | |
1125 | */ | |
53873f13 | 1126 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
174e0cd2 IP |
1127 | struct ieee80211_channel *other_chan = NULL; |
1128 | int r1, r2; | |
1129 | ||
be69c24a AS |
1130 | wdev_lock(wdev); |
1131 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1132 | wdev->current_bss) | |
1133 | other_chan = wdev->current_bss->pub.channel; | |
1134 | ||
1135 | /* | |
1136 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1137 | * this one (maybe the same one) can beacon as well. We allow | |
1138 | * the operation even if the station we relied on with | |
1139 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1140 | * we're not outdoor on an indoor-only channel. | |
1141 | */ | |
06f207fc AN |
1142 | if (iftype == NL80211_IFTYPE_P2P_GO && |
1143 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
be69c24a AS |
1144 | wdev->beacon_interval && |
1145 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1146 | other_chan = wdev->chandef.chan; | |
1147 | wdev_unlock(wdev); | |
174e0cd2 IP |
1148 | |
1149 | if (!other_chan) | |
1150 | continue; | |
1151 | ||
1152 | if (chan == other_chan) | |
1153 | return true; | |
1154 | ||
0816e6b1 AS |
1155 | if (chan->band != NL80211_BAND_5GHZ && |
1156 | chan->band != NL80211_BAND_6GHZ) | |
174e0cd2 IP |
1157 | continue; |
1158 | ||
1159 | r1 = cfg80211_get_unii(chan->center_freq); | |
1160 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1161 | ||
46d53724 IP |
1162 | if (r1 != -EINVAL && r1 == r2) { |
1163 | /* | |
1164 | * At some locations channels 149-165 are considered a | |
1165 | * bundle, but at other locations, e.g., Indonesia, | |
1166 | * channels 149-161 are considered a bundle while | |
1167 | * channel 165 is left out and considered to be in a | |
1168 | * different bundle. Thus, in case that there is a | |
1169 | * station interface connected to an AP on channel 165, | |
1170 | * it is assumed that channels 149-161 are allowed for | |
1171 | * GO operations. However, having a station interface | |
1172 | * connected to an AP on channels 149-161, does not | |
1173 | * allow GO operation on channel 165. | |
1174 | */ | |
1175 | if (chan->center_freq == 5825 && | |
1176 | other_chan->center_freq != 5825) | |
1177 | continue; | |
174e0cd2 | 1178 | return true; |
46d53724 | 1179 | } |
174e0cd2 IP |
1180 | } |
1181 | ||
1182 | return false; | |
1183 | } | |
1184 | ||
923b352f AN |
1185 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1186 | struct cfg80211_chan_def *chandef, | |
1187 | enum nl80211_iftype iftype, | |
1188 | bool check_no_ir) | |
9f5e8f6e JB |
1189 | { |
1190 | bool res; | |
6bc54fbc | 1191 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED | |
6bc54fbc | 1192 | IEEE80211_CHAN_RADAR; |
9f5e8f6e | 1193 | |
923b352f | 1194 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1195 | |
923b352f | 1196 | if (check_no_ir) |
174e0cd2 | 1197 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1198 | |
00ec75fc | 1199 | if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && |
6bc54fbc JD |
1200 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1201 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1202 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1203 | } | |
1204 | ||
1205 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1206 | |
1207 | trace_cfg80211_return_bool(res); | |
1208 | return res; | |
9236d838 | 1209 | } |
923b352f AN |
1210 | |
1211 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1212 | struct cfg80211_chan_def *chandef, | |
1213 | enum nl80211_iftype iftype) | |
1214 | { | |
1215 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1216 | } | |
683b6d3b | 1217 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1218 | |
923b352f AN |
1219 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1220 | struct cfg80211_chan_def *chandef, | |
1221 | enum nl80211_iftype iftype) | |
1222 | { | |
a05829a7 | 1223 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
923b352f AN |
1224 | bool check_no_ir; |
1225 | ||
a05829a7 | 1226 | lockdep_assert_held(&rdev->wiphy.mtx); |
923b352f AN |
1227 | |
1228 | /* | |
1229 | * Under certain conditions suggested by some regulatory bodies a | |
1230 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1231 | * only if such relaxations are not enabled and the conditions are not | |
1232 | * met. | |
1233 | */ | |
1234 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1235 | chandef->chan); | |
1236 | ||
1237 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1238 | } | |
1239 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1240 | ||
e8c9bd5b | 1241 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1242 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1243 | { |
e8c9bd5b | 1244 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1245 | return -EOPNOTSUPP; |
4f03c1ed MK |
1246 | if (!cfg80211_has_monitors_only(rdev)) |
1247 | return -EBUSY; | |
9588bbd5 | 1248 | |
683b6d3b | 1249 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1250 | } |
26ab9a0c MK |
1251 | |
1252 | void | |
8e95ea49 | 1253 | cfg80211_get_chan_state(struct wireless_dev *wdev, |
26ab9a0c | 1254 | struct ieee80211_channel **chan, |
9e0e2961 MK |
1255 | enum cfg80211_chan_mode *chanmode, |
1256 | u8 *radar_detect) | |
26ab9a0c | 1257 | { |
2beb6dab LC |
1258 | int ret; |
1259 | ||
26ab9a0c MK |
1260 | *chan = NULL; |
1261 | *chanmode = CHAN_MODE_UNDEFINED; | |
1262 | ||
26ab9a0c MK |
1263 | ASSERT_WDEV_LOCK(wdev); |
1264 | ||
98104fde | 1265 | if (wdev->netdev && !netif_running(wdev->netdev)) |
26ab9a0c MK |
1266 | return; |
1267 | ||
1268 | switch (wdev->iftype) { | |
1269 | case NL80211_IFTYPE_ADHOC: | |
1270 | if (wdev->current_bss) { | |
1271 | *chan = wdev->current_bss->pub.channel; | |
5336fa88 SW |
1272 | *chanmode = (wdev->ibss_fixed && |
1273 | !wdev->ibss_dfs_possible) | |
26ab9a0c MK |
1274 | ? CHAN_MODE_SHARED |
1275 | : CHAN_MODE_EXCLUSIVE; | |
9e0e2961 MK |
1276 | |
1277 | /* consider worst-case - IBSS can try to return to the | |
1278 | * original user-specified channel as creator */ | |
1279 | if (wdev->ibss_dfs_possible) | |
1280 | *radar_detect |= BIT(wdev->chandef.width); | |
26ab9a0c MK |
1281 | return; |
1282 | } | |
0f0094b3 | 1283 | break; |
26ab9a0c MK |
1284 | case NL80211_IFTYPE_STATION: |
1285 | case NL80211_IFTYPE_P2P_CLIENT: | |
1286 | if (wdev->current_bss) { | |
1287 | *chan = wdev->current_bss->pub.channel; | |
1288 | *chanmode = CHAN_MODE_SHARED; | |
1289 | return; | |
1290 | } | |
1291 | break; | |
1292 | case NL80211_IFTYPE_AP: | |
1293 | case NL80211_IFTYPE_P2P_GO: | |
04f39047 | 1294 | if (wdev->cac_started) { |
9e0e2961 | 1295 | *chan = wdev->chandef.chan; |
04f39047 | 1296 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1297 | *radar_detect |= BIT(wdev->chandef.width); |
04f39047 | 1298 | } else if (wdev->beacon_interval) { |
9e0e2961 | 1299 | *chan = wdev->chandef.chan; |
f53594a0 | 1300 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1301 | |
2beb6dab LC |
1302 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1303 | &wdev->chandef, | |
1304 | wdev->iftype); | |
1305 | WARN_ON(ret < 0); | |
1306 | if (ret > 0) | |
9e0e2961 | 1307 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 FF |
1308 | } |
1309 | return; | |
26ab9a0c | 1310 | case NL80211_IFTYPE_MESH_POINT: |
f53594a0 | 1311 | if (wdev->mesh_id_len) { |
9e0e2961 | 1312 | *chan = wdev->chandef.chan; |
f53594a0 | 1313 | *chanmode = CHAN_MODE_SHARED; |
9e0e2961 | 1314 | |
2beb6dab LC |
1315 | ret = cfg80211_chandef_dfs_required(wdev->wiphy, |
1316 | &wdev->chandef, | |
1317 | wdev->iftype); | |
1318 | WARN_ON(ret < 0); | |
1319 | if (ret > 0) | |
9e0e2961 | 1320 | *radar_detect |= BIT(wdev->chandef.width); |
f53594a0 | 1321 | } |
26ab9a0c | 1322 | return; |
6e0bd6c3 RL |
1323 | case NL80211_IFTYPE_OCB: |
1324 | if (wdev->chandef.chan) { | |
1325 | *chan = wdev->chandef.chan; | |
1326 | *chanmode = CHAN_MODE_SHARED; | |
1327 | return; | |
1328 | } | |
1329 | break; | |
26ab9a0c MK |
1330 | case NL80211_IFTYPE_MONITOR: |
1331 | case NL80211_IFTYPE_AP_VLAN: | |
98104fde | 1332 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1333 | case NL80211_IFTYPE_NAN: |
e7aceef4 | 1334 | /* these interface types don't really have a channel */ |
98104fde | 1335 | return; |
26ab9a0c | 1336 | case NL80211_IFTYPE_UNSPECIFIED: |
e7e0517c | 1337 | case NL80211_IFTYPE_WDS: |
26ab9a0c MK |
1338 | case NUM_NL80211_IFTYPES: |
1339 | WARN_ON(1); | |
1340 | } | |
26ab9a0c | 1341 | } |