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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 |
e8c18412 | 9 | * Copyright 2018-2023 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 | ||
10fa22b6 | 144 | int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width) |
11b34737 TP |
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 | } | |
10fa22b6 | 193 | EXPORT_SYMBOL(nl80211_chan_width_to_mhz); |
11b34737 TP |
194 | |
195 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) | |
196 | { | |
197 | return nl80211_chan_width_to_mhz(c->width); | |
198 | } | |
199 | ||
9f5e8f6e | 200 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 | 201 | { |
11b34737 TP |
202 | u32 control_freq, oper_freq; |
203 | int oper_width, control_width; | |
3d9d1d66 JB |
204 | |
205 | if (!chandef->chan) | |
206 | return false; | |
207 | ||
be689f68 JB |
208 | if (chandef->freq1_offset >= 1000) |
209 | return false; | |
210 | ||
3d9d1d66 JB |
211 | control_freq = chandef->chan->center_freq; |
212 | ||
213 | switch (chandef->width) { | |
2f301ab2 SW |
214 | case NL80211_CHAN_WIDTH_5: |
215 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
216 | case NL80211_CHAN_WIDTH_20: |
217 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
218 | if (ieee80211_chandef_to_khz(chandef) != |
219 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
220 | return false; |
221 | if (chandef->center_freq2) | |
222 | return false; | |
223 | break; | |
c1cd35c6 | 224 | case NL80211_CHAN_WIDTH_1: |
11b34737 TP |
225 | case NL80211_CHAN_WIDTH_2: |
226 | case NL80211_CHAN_WIDTH_4: | |
227 | case NL80211_CHAN_WIDTH_8: | |
228 | case NL80211_CHAN_WIDTH_16: | |
c1cd35c6 TP |
229 | if (chandef->chan->band != NL80211_BAND_S1GHZ) |
230 | return false; | |
231 | ||
11b34737 TP |
232 | control_freq = ieee80211_channel_to_khz(chandef->chan); |
233 | oper_freq = ieee80211_chandef_to_khz(chandef); | |
234 | control_width = nl80211_chan_width_to_mhz( | |
235 | ieee80211_s1g_channel_width( | |
236 | chandef->chan)); | |
237 | oper_width = cfg80211_chandef_get_width(chandef); | |
238 | ||
239 | if (oper_width < 0 || control_width < 0) | |
240 | return false; | |
241 | if (chandef->center_freq2) | |
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 | ||
248 | if (control_freq - MHZ_TO_KHZ(control_width) / 2 < | |
249 | oper_freq - MHZ_TO_KHZ(oper_width) / 2) | |
250 | return false; | |
251 | break; | |
3d9d1d66 | 252 | case NL80211_CHAN_WIDTH_80P80: |
3d9d1d66 JB |
253 | if (!chandef->center_freq2) |
254 | return false; | |
9cab3151 JB |
255 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
256 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
257 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
258 | return false; | |
3d9d1d66 | 259 | break; |
3bb1ccc4 | 260 | default: |
3d9d1d66 JB |
261 | if (chandef->center_freq2) |
262 | return false; | |
263 | break; | |
3bb1ccc4 JB |
264 | } |
265 | ||
266 | switch (chandef->width) { | |
267 | case NL80211_CHAN_WIDTH_5: | |
268 | case NL80211_CHAN_WIDTH_10: | |
269 | case NL80211_CHAN_WIDTH_20: | |
270 | case NL80211_CHAN_WIDTH_20_NOHT: | |
271 | case NL80211_CHAN_WIDTH_1: | |
272 | case NL80211_CHAN_WIDTH_2: | |
273 | case NL80211_CHAN_WIDTH_4: | |
274 | case NL80211_CHAN_WIDTH_8: | |
275 | case NL80211_CHAN_WIDTH_16: | |
276 | /* all checked above */ | |
3d9d1d66 | 277 | break; |
3743bec6 JD |
278 | case NL80211_CHAN_WIDTH_320: |
279 | if (chandef->center_freq1 == control_freq + 150 || | |
280 | chandef->center_freq1 == control_freq + 130 || | |
281 | chandef->center_freq1 == control_freq + 110 || | |
282 | chandef->center_freq1 == control_freq + 90 || | |
283 | chandef->center_freq1 == control_freq - 90 || | |
284 | chandef->center_freq1 == control_freq - 110 || | |
285 | chandef->center_freq1 == control_freq - 130 || | |
286 | chandef->center_freq1 == control_freq - 150) | |
287 | break; | |
288 | fallthrough; | |
3bb1ccc4 JB |
289 | case NL80211_CHAN_WIDTH_160: |
290 | if (chandef->center_freq1 == control_freq + 70 || | |
291 | chandef->center_freq1 == control_freq + 50 || | |
292 | chandef->center_freq1 == control_freq - 50 || | |
293 | chandef->center_freq1 == control_freq - 70) | |
294 | break; | |
295 | fallthrough; | |
296 | case NL80211_CHAN_WIDTH_80P80: | |
297 | case NL80211_CHAN_WIDTH_80: | |
298 | if (chandef->center_freq1 == control_freq + 30 || | |
299 | chandef->center_freq1 == control_freq - 30) | |
300 | break; | |
301 | fallthrough; | |
302 | case NL80211_CHAN_WIDTH_40: | |
303 | if (chandef->center_freq1 == control_freq + 10 || | |
304 | chandef->center_freq1 == control_freq - 10) | |
305 | break; | |
306 | fallthrough; | |
3d9d1d66 JB |
307 | default: |
308 | return false; | |
309 | } | |
310 | ||
ec649fed MH |
311 | /* channel 14 is only for IEEE 802.11b */ |
312 | if (chandef->center_freq1 == 2484 && | |
313 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
314 | return false; | |
315 | ||
2a38075c AAL |
316 | if (cfg80211_chandef_is_edmg(chandef) && |
317 | !cfg80211_edmg_chandef_valid(chandef)) | |
318 | return false; | |
319 | ||
3d9d1d66 JB |
320 | return true; |
321 | } | |
9f5e8f6e | 322 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 JB |
323 | |
324 | static void chandef_primary_freqs(const struct cfg80211_chan_def *c, | |
3743bec6 | 325 | u32 *pri40, u32 *pri80, u32 *pri160) |
3d9d1d66 JB |
326 | { |
327 | int tmp; | |
328 | ||
329 | switch (c->width) { | |
330 | case NL80211_CHAN_WIDTH_40: | |
331 | *pri40 = c->center_freq1; | |
332 | *pri80 = 0; | |
3743bec6 | 333 | *pri160 = 0; |
3d9d1d66 JB |
334 | break; |
335 | case NL80211_CHAN_WIDTH_80: | |
336 | case NL80211_CHAN_WIDTH_80P80: | |
3743bec6 | 337 | *pri160 = 0; |
3d9d1d66 JB |
338 | *pri80 = c->center_freq1; |
339 | /* n_P20 */ | |
340 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
341 | /* n_P40 */ | |
342 | tmp /= 2; | |
343 | /* freq_P40 */ | |
344 | *pri40 = c->center_freq1 - 20 + 40 * tmp; | |
345 | break; | |
346 | case NL80211_CHAN_WIDTH_160: | |
3743bec6 | 347 | *pri160 = c->center_freq1; |
3d9d1d66 JB |
348 | /* n_P20 */ |
349 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
350 | /* n_P40 */ | |
351 | tmp /= 2; | |
352 | /* freq_P40 */ | |
353 | *pri40 = c->center_freq1 - 60 + 40 * tmp; | |
354 | /* n_P80 */ | |
355 | tmp /= 2; | |
356 | *pri80 = c->center_freq1 - 40 + 80 * tmp; | |
357 | break; | |
3743bec6 JD |
358 | case NL80211_CHAN_WIDTH_320: |
359 | /* n_P20 */ | |
360 | tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; | |
361 | /* n_P40 */ | |
362 | tmp /= 2; | |
363 | /* freq_P40 */ | |
364 | *pri40 = c->center_freq1 - 140 + 40 * tmp; | |
365 | /* n_P80 */ | |
366 | tmp /= 2; | |
367 | *pri80 = c->center_freq1 - 120 + 80 * tmp; | |
368 | /* n_P160 */ | |
369 | tmp /= 2; | |
370 | *pri160 = c->center_freq1 - 80 + 160 * tmp; | |
371 | break; | |
3d9d1d66 JB |
372 | default: |
373 | WARN_ON_ONCE(1); | |
374 | } | |
375 | } | |
376 | ||
377 | const struct cfg80211_chan_def * | |
378 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
379 | const struct cfg80211_chan_def *c2) | |
380 | { | |
3743bec6 | 381 | u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80, c1_pri160, c2_pri160; |
3d9d1d66 JB |
382 | |
383 | /* If they are identical, return */ | |
384 | if (cfg80211_chandef_identical(c1, c2)) | |
385 | return c1; | |
386 | ||
387 | /* otherwise, must have same control channel */ | |
388 | if (c1->chan != c2->chan) | |
389 | return NULL; | |
390 | ||
391 | /* | |
392 | * If they have the same width, but aren't identical, | |
393 | * then they can't be compatible. | |
394 | */ | |
395 | if (c1->width == c2->width) | |
396 | return NULL; | |
397 | ||
2f301ab2 SW |
398 | /* |
399 | * can't be compatible if one of them is 5 or 10 MHz, | |
400 | * but they don't have the same width. | |
401 | */ | |
402 | if (c1->width == NL80211_CHAN_WIDTH_5 || | |
403 | c1->width == NL80211_CHAN_WIDTH_10 || | |
404 | c2->width == NL80211_CHAN_WIDTH_5 || | |
405 | c2->width == NL80211_CHAN_WIDTH_10) | |
406 | return NULL; | |
407 | ||
3d9d1d66 JB |
408 | if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || |
409 | c1->width == NL80211_CHAN_WIDTH_20) | |
410 | return c2; | |
411 | ||
412 | if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || | |
413 | c2->width == NL80211_CHAN_WIDTH_20) | |
414 | return c1; | |
415 | ||
3743bec6 JD |
416 | chandef_primary_freqs(c1, &c1_pri40, &c1_pri80, &c1_pri160); |
417 | chandef_primary_freqs(c2, &c2_pri40, &c2_pri80, &c2_pri160); | |
3d9d1d66 JB |
418 | |
419 | if (c1_pri40 != c2_pri40) | |
420 | return NULL; | |
421 | ||
3743bec6 JD |
422 | if (c1->width == NL80211_CHAN_WIDTH_40) |
423 | return c2; | |
424 | ||
425 | if (c2->width == NL80211_CHAN_WIDTH_40) | |
426 | return c1; | |
427 | ||
428 | if (c1_pri80 != c2_pri80) | |
429 | return NULL; | |
430 | ||
431 | if (c1->width == NL80211_CHAN_WIDTH_80 && | |
432 | c2->width > NL80211_CHAN_WIDTH_80) | |
433 | return c2; | |
434 | ||
435 | if (c2->width == NL80211_CHAN_WIDTH_80 && | |
436 | c1->width > NL80211_CHAN_WIDTH_80) | |
437 | return c1; | |
438 | ||
439 | WARN_ON(!c1_pri160 && !c2_pri160); | |
440 | if (c1_pri160 && c2_pri160 && c1_pri160 != c2_pri160) | |
3d9d1d66 JB |
441 | return NULL; |
442 | ||
443 | if (c1->width > c2->width) | |
444 | return c1; | |
445 | return c2; | |
446 | } | |
447 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
448 | ||
04f39047 SW |
449 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
450 | u32 bandwidth, | |
451 | enum nl80211_dfs_state dfs_state) | |
452 | { | |
453 | struct ieee80211_channel *c; | |
454 | u32 freq; | |
455 | ||
456 | for (freq = center_freq - bandwidth/2 + 10; | |
457 | freq <= center_freq + bandwidth/2 - 10; | |
458 | freq += 20) { | |
459 | c = ieee80211_get_channel(wiphy, freq); | |
460 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
461 | continue; | |
462 | ||
463 | c->dfs_state = dfs_state; | |
464 | c->dfs_state_entered = jiffies; | |
465 | } | |
466 | } | |
467 | ||
468 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
469 | const struct cfg80211_chan_def *chandef, | |
470 | enum nl80211_dfs_state dfs_state) | |
471 | { | |
472 | int width; | |
473 | ||
474 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
475 | return; | |
476 | ||
477 | width = cfg80211_chandef_get_width(chandef); | |
478 | if (width < 0) | |
479 | return; | |
480 | ||
481 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
482 | width, dfs_state); | |
483 | ||
484 | if (!chandef->center_freq2) | |
485 | return; | |
486 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
487 | width, dfs_state); | |
488 | } | |
489 | ||
40d1ba63 JD |
490 | static u32 cfg80211_get_start_freq(u32 center_freq, |
491 | u32 bandwidth) | |
492 | { | |
493 | u32 start_freq; | |
494 | ||
934f4c7d TP |
495 | bandwidth = MHZ_TO_KHZ(bandwidth); |
496 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
497 | start_freq = center_freq; |
498 | else | |
934f4c7d | 499 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
500 | |
501 | return start_freq; | |
502 | } | |
503 | ||
504 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
505 | u32 bandwidth) | |
506 | { | |
507 | u32 end_freq; | |
508 | ||
934f4c7d TP |
509 | bandwidth = MHZ_TO_KHZ(bandwidth); |
510 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
511 | end_freq = center_freq; |
512 | else | |
934f4c7d | 513 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
514 | |
515 | return end_freq; | |
516 | } | |
517 | ||
41a313d8 AO |
518 | static bool |
519 | cfg80211_dfs_permissive_check_wdev(struct cfg80211_registered_device *rdev, | |
520 | enum nl80211_iftype iftype, | |
521 | struct wireless_dev *wdev, | |
522 | struct ieee80211_channel *chan) | |
523 | { | |
524 | unsigned int link_id; | |
525 | ||
526 | for_each_valid_link(wdev, link_id) { | |
527 | struct ieee80211_channel *other_chan = NULL; | |
528 | struct cfg80211_chan_def chandef = {}; | |
529 | int ret; | |
530 | ||
531 | /* In order to avoid daisy chaining only allow BSS STA */ | |
532 | if (wdev->iftype != NL80211_IFTYPE_STATION || | |
533 | !wdev->links[link_id].client.current_bss) | |
534 | continue; | |
535 | ||
536 | other_chan = | |
537 | wdev->links[link_id].client.current_bss->pub.channel; | |
538 | ||
539 | if (!other_chan) | |
540 | continue; | |
541 | ||
542 | if (chan == other_chan) | |
543 | return true; | |
544 | ||
545 | /* continue if we can't get the channel */ | |
546 | ret = rdev_get_channel(rdev, wdev, link_id, &chandef); | |
547 | if (ret) | |
548 | continue; | |
549 | ||
550 | if (cfg80211_is_sub_chan(&chandef, chan, false)) | |
551 | return true; | |
552 | } | |
553 | ||
554 | return false; | |
555 | } | |
556 | ||
557 | /* | |
558 | * Check if P2P GO is allowed to operate on a DFS channel | |
559 | */ | |
560 | static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy, | |
561 | enum nl80211_iftype iftype, | |
562 | struct ieee80211_channel *chan) | |
563 | { | |
564 | struct wireless_dev *wdev; | |
565 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
566 | ||
567 | lockdep_assert_held(&rdev->wiphy.mtx); | |
568 | ||
569 | if (!wiphy_ext_feature_isset(&rdev->wiphy, | |
570 | NL80211_EXT_FEATURE_DFS_CONCURRENT) || | |
571 | !(chan->flags & IEEE80211_CHAN_DFS_CONCURRENT)) | |
572 | return false; | |
573 | ||
574 | /* only valid for P2P GO */ | |
575 | if (iftype != NL80211_IFTYPE_P2P_GO) | |
576 | return false; | |
577 | ||
578 | /* | |
579 | * Allow only if there's a concurrent BSS | |
580 | */ | |
581 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
582 | bool ret = cfg80211_dfs_permissive_check_wdev(rdev, iftype, | |
583 | wdev, chan); | |
584 | if (ret) | |
585 | return ret; | |
586 | } | |
587 | ||
588 | return false; | |
589 | } | |
590 | ||
04f39047 SW |
591 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
592 | u32 center_freq, | |
41a313d8 AO |
593 | u32 bandwidth, |
594 | enum nl80211_iftype iftype) | |
04f39047 SW |
595 | { |
596 | struct ieee80211_channel *c; | |
2f301ab2 SW |
597 | u32 freq, start_freq, end_freq; |
598 | ||
40d1ba63 JD |
599 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
600 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 601 | |
934f4c7d TP |
602 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
603 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
604 | if (!c) |
605 | return -EINVAL; | |
606 | ||
41a313d8 AO |
607 | if (c->flags & IEEE80211_CHAN_RADAR && |
608 | !cfg80211_dfs_permissive_chan(wiphy, iftype, c)) | |
04f39047 SW |
609 | return 1; |
610 | } | |
41a313d8 | 611 | |
04f39047 SW |
612 | return 0; |
613 | } | |
614 | ||
615 | ||
616 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
617 | const struct cfg80211_chan_def *chandef, |
618 | enum nl80211_iftype iftype) | |
04f39047 SW |
619 | { |
620 | int width; | |
2beb6dab | 621 | int ret; |
04f39047 SW |
622 | |
623 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
624 | return -EINVAL; | |
625 | ||
2beb6dab LC |
626 | switch (iftype) { |
627 | case NL80211_IFTYPE_ADHOC: | |
628 | case NL80211_IFTYPE_AP: | |
629 | case NL80211_IFTYPE_P2P_GO: | |
630 | case NL80211_IFTYPE_MESH_POINT: | |
631 | width = cfg80211_chandef_get_width(chandef); | |
632 | if (width < 0) | |
633 | return -EINVAL; | |
04f39047 | 634 | |
2beb6dab | 635 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d | 636 | ieee80211_chandef_to_khz(chandef), |
41a313d8 | 637 | width, iftype); |
2beb6dab LC |
638 | if (ret < 0) |
639 | return ret; | |
640 | else if (ret > 0) | |
641 | return BIT(chandef->width); | |
04f39047 | 642 | |
2beb6dab LC |
643 | if (!chandef->center_freq2) |
644 | return 0; | |
645 | ||
646 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d | 647 | MHZ_TO_KHZ(chandef->center_freq2), |
41a313d8 | 648 | width, iftype); |
2beb6dab LC |
649 | if (ret < 0) |
650 | return ret; | |
651 | else if (ret > 0) | |
652 | return BIT(chandef->width); | |
04f39047 | 653 | |
2beb6dab LC |
654 | break; |
655 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 656 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
657 | case NL80211_IFTYPE_P2P_CLIENT: |
658 | case NL80211_IFTYPE_MONITOR: | |
659 | case NL80211_IFTYPE_AP_VLAN: | |
2beb6dab | 660 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 661 | case NL80211_IFTYPE_NAN: |
2beb6dab | 662 | break; |
e7e0517c | 663 | case NL80211_IFTYPE_WDS: |
00ec75fc | 664 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
665 | case NUM_NL80211_IFTYPES: |
666 | WARN_ON(1); | |
667 | } | |
668 | ||
669 | return 0; | |
04f39047 | 670 | } |
774f0734 | 671 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 672 | |
fe7c3a1f JD |
673 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
674 | u32 center_freq, | |
675 | u32 bandwidth) | |
676 | { | |
677 | struct ieee80211_channel *c; | |
678 | u32 freq, start_freq, end_freq; | |
679 | int count = 0; | |
680 | ||
681 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
682 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
683 | ||
684 | /* | |
685 | * Check entire range of channels for the bandwidth. | |
686 | * Check all channels are DFS channels (DFS_USABLE or | |
687 | * DFS_AVAILABLE). Return number of usable channels | |
688 | * (require CAC). Allow DFS and non-DFS channel mix. | |
689 | */ | |
934f4c7d TP |
690 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
691 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
692 | if (!c) |
693 | return -EINVAL; | |
694 | ||
695 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
696 | return -EINVAL; | |
697 | ||
698 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
699 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
700 | return -EINVAL; | |
701 | ||
702 | if (c->dfs_state == NL80211_DFS_USABLE) | |
703 | count++; | |
704 | } | |
705 | } | |
706 | ||
707 | return count; | |
708 | } | |
709 | ||
710 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
711 | const struct cfg80211_chan_def *chandef) | |
712 | { | |
713 | int width; | |
714 | int r1, r2 = 0; | |
715 | ||
716 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
717 | return false; | |
718 | ||
719 | width = cfg80211_chandef_get_width(chandef); | |
720 | if (width < 0) | |
721 | return false; | |
722 | ||
934f4c7d TP |
723 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
724 | MHZ_TO_KHZ(chandef->center_freq1), | |
725 | width); | |
fe7c3a1f JD |
726 | |
727 | if (r1 < 0) | |
728 | return false; | |
729 | ||
730 | switch (chandef->width) { | |
731 | case NL80211_CHAN_WIDTH_80P80: | |
732 | WARN_ON(!chandef->center_freq2); | |
733 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
734 | MHZ_TO_KHZ(chandef->center_freq2), |
735 | width); | |
fe7c3a1f JD |
736 | if (r2 < 0) |
737 | return false; | |
738 | break; | |
739 | default: | |
740 | WARN_ON(chandef->center_freq2); | |
741 | break; | |
742 | } | |
743 | ||
744 | return (r1 + r2 > 0); | |
745 | } | |
30ca8b0c | 746 | EXPORT_SYMBOL(cfg80211_chandef_dfs_usable); |
fe7c3a1f | 747 | |
b35a51c7 VT |
748 | /* |
749 | * Checks if center frequency of chan falls with in the bandwidth | |
750 | * range of chandef. | |
751 | */ | |
752 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
7b0a0e3c JB |
753 | struct ieee80211_channel *chan, |
754 | bool primary_only) | |
b35a51c7 VT |
755 | { |
756 | int width; | |
a67a4893 | 757 | u32 freq; |
b35a51c7 | 758 | |
7b0a0e3c JB |
759 | if (!chandef->chan) |
760 | return false; | |
761 | ||
b35a51c7 VT |
762 | if (chandef->chan->center_freq == chan->center_freq) |
763 | return true; | |
764 | ||
7b0a0e3c JB |
765 | if (primary_only) |
766 | return false; | |
767 | ||
b35a51c7 VT |
768 | width = cfg80211_chandef_get_width(chandef); |
769 | if (width <= 20) | |
770 | return false; | |
771 | ||
b35a51c7 VT |
772 | for (freq = chandef->center_freq1 - width / 2 + 10; |
773 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
774 | if (chan->center_freq == freq) | |
775 | return true; | |
776 | } | |
777 | ||
778 | if (!chandef->center_freq2) | |
779 | return false; | |
780 | ||
781 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
782 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
783 | if (chan->center_freq == freq) | |
784 | return true; | |
785 | } | |
786 | ||
787 | return false; | |
788 | } | |
789 | ||
790 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
791 | { | |
7b0a0e3c | 792 | unsigned int link; |
b35a51c7 | 793 | |
076fc877 | 794 | lockdep_assert_wiphy(wdev->wiphy); |
b35a51c7 | 795 | |
b35a51c7 VT |
796 | switch (wdev->iftype) { |
797 | case NL80211_IFTYPE_AP: | |
798 | case NL80211_IFTYPE_P2P_GO: | |
7b0a0e3c JB |
799 | for_each_valid_link(wdev, link) { |
800 | if (wdev->links[link].ap.beacon_interval) | |
801 | return true; | |
802 | } | |
b35a51c7 VT |
803 | break; |
804 | case NL80211_IFTYPE_ADHOC: | |
7b0a0e3c JB |
805 | if (wdev->u.ibss.ssid_len) |
806 | return true; | |
b35a51c7 VT |
807 | break; |
808 | case NL80211_IFTYPE_MESH_POINT: | |
7b0a0e3c JB |
809 | if (wdev->u.mesh.id_len) |
810 | return true; | |
b35a51c7 VT |
811 | break; |
812 | case NL80211_IFTYPE_STATION: | |
813 | case NL80211_IFTYPE_OCB: | |
814 | case NL80211_IFTYPE_P2P_CLIENT: | |
815 | case NL80211_IFTYPE_MONITOR: | |
816 | case NL80211_IFTYPE_AP_VLAN: | |
b35a51c7 VT |
817 | case NL80211_IFTYPE_P2P_DEVICE: |
818 | /* Can NAN type be considered as beaconing interface? */ | |
819 | case NL80211_IFTYPE_NAN: | |
820 | break; | |
821 | case NL80211_IFTYPE_UNSPECIFIED: | |
e7e0517c | 822 | case NL80211_IFTYPE_WDS: |
b35a51c7 VT |
823 | case NUM_NL80211_IFTYPES: |
824 | WARN_ON(1); | |
825 | } | |
826 | ||
7b0a0e3c JB |
827 | return false; |
828 | } | |
829 | ||
830 | bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, | |
831 | struct ieee80211_channel *chan, | |
832 | bool primary_only) | |
833 | { | |
834 | unsigned int link; | |
835 | ||
836 | switch (wdev->iftype) { | |
837 | case NL80211_IFTYPE_AP: | |
838 | case NL80211_IFTYPE_P2P_GO: | |
839 | for_each_valid_link(wdev, link) { | |
840 | if (cfg80211_is_sub_chan(&wdev->links[link].ap.chandef, | |
841 | chan, primary_only)) | |
842 | return true; | |
843 | } | |
844 | break; | |
845 | case NL80211_IFTYPE_ADHOC: | |
846 | return cfg80211_is_sub_chan(&wdev->u.ibss.chandef, chan, | |
847 | primary_only); | |
848 | case NL80211_IFTYPE_MESH_POINT: | |
849 | return cfg80211_is_sub_chan(&wdev->u.mesh.chandef, chan, | |
850 | primary_only); | |
851 | default: | |
852 | break; | |
853 | } | |
854 | ||
855 | return false; | |
b35a51c7 VT |
856 | } |
857 | ||
89766727 VT |
858 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
859 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
860 | { |
861 | struct wireless_dev *wdev; | |
862 | ||
076fc877 JB |
863 | lockdep_assert_wiphy(wiphy); |
864 | ||
b35a51c7 | 865 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
076fc877 | 866 | if (!cfg80211_beaconing_iface_active(wdev)) |
b35a51c7 | 867 | continue; |
b35a51c7 | 868 | |
076fc877 | 869 | if (cfg80211_wdev_on_sub_chan(wdev, chan, false)) |
b35a51c7 | 870 | return true; |
b35a51c7 VT |
871 | } |
872 | ||
873 | return false; | |
874 | } | |
fe7c3a1f | 875 | |
84158164 LB |
876 | static bool |
877 | cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev, | |
878 | struct ieee80211_channel *channel) | |
879 | { | |
a95bfb87 | 880 | if (!rdev->background_radar_wdev) |
84158164 LB |
881 | return false; |
882 | ||
a95bfb87 | 883 | if (!cfg80211_chandef_valid(&rdev->background_radar_chandef)) |
84158164 LB |
884 | return false; |
885 | ||
7b0a0e3c JB |
886 | return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel, |
887 | false); | |
84158164 LB |
888 | } |
889 | ||
89766727 VT |
890 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
891 | struct ieee80211_channel *chan) | |
892 | { | |
893 | struct cfg80211_registered_device *rdev; | |
894 | ||
895 | ASSERT_RTNL(); | |
896 | ||
897 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
898 | return false; | |
899 | ||
7483a214 | 900 | for_each_rdev(rdev) { |
fa8809a5 JB |
901 | bool found; |
902 | ||
89766727 VT |
903 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) |
904 | continue; | |
905 | ||
fa8809a5 JB |
906 | wiphy_lock(&rdev->wiphy); |
907 | found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) || | |
908 | cfg80211_offchan_chain_is_active(rdev, chan); | |
909 | wiphy_unlock(&rdev->wiphy); | |
84158164 | 910 | |
fa8809a5 | 911 | if (found) |
84158164 | 912 | return true; |
89766727 VT |
913 | } |
914 | ||
915 | return false; | |
916 | } | |
917 | ||
6bc54fbc JD |
918 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
919 | u32 center_freq, | |
920 | u32 bandwidth) | |
3d9d1d66 JB |
921 | { |
922 | struct ieee80211_channel *c; | |
2f301ab2 | 923 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
924 | bool dfs_offload; |
925 | ||
926 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
927 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 928 | |
40d1ba63 JD |
929 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
930 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 931 | |
6bc54fbc JD |
932 | /* |
933 | * Check entire range of channels for the bandwidth. | |
934 | * If any channel in between is disabled or has not | |
935 | * had gone through CAC return false | |
936 | */ | |
934f4c7d TP |
937 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
938 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
939 | if (!c) |
940 | return false; | |
941 | ||
6bc54fbc JD |
942 | if (c->flags & IEEE80211_CHAN_DISABLED) |
943 | return false; | |
944 | ||
2c390e44 DL |
945 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
946 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
947 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 948 | return false; |
6bc54fbc JD |
949 | } |
950 | ||
951 | return true; | |
952 | } | |
953 | ||
954 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
955 | const struct cfg80211_chan_def *chandef) | |
956 | { | |
957 | int width; | |
958 | int r; | |
959 | ||
960 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
961 | return false; | |
962 | ||
963 | width = cfg80211_chandef_get_width(chandef); | |
964 | if (width < 0) | |
965 | return false; | |
966 | ||
934f4c7d TP |
967 | r = cfg80211_get_chans_dfs_available(wiphy, |
968 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
969 | width); |
970 | ||
971 | /* If any of channels unavailable for cf1 just return */ | |
972 | if (!r) | |
973 | return r; | |
974 | ||
975 | switch (chandef->width) { | |
976 | case NL80211_CHAN_WIDTH_80P80: | |
977 | WARN_ON(!chandef->center_freq2); | |
978 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
979 | MHZ_TO_KHZ(chandef->center_freq2), |
980 | width); | |
680682d4 | 981 | break; |
6bc54fbc JD |
982 | default: |
983 | WARN_ON(chandef->center_freq2); | |
984 | break; | |
985 | } | |
986 | ||
987 | return r; | |
988 | } | |
989 | ||
31559f35 JD |
990 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
991 | u32 center_freq, | |
992 | u32 bandwidth) | |
993 | { | |
994 | struct ieee80211_channel *c; | |
995 | u32 start_freq, end_freq, freq; | |
996 | unsigned int dfs_cac_ms = 0; | |
997 | ||
998 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
999 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1000 | ||
934f4c7d TP |
1001 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1002 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
1003 | if (!c) |
1004 | return 0; | |
1005 | ||
1006 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
1007 | return 0; | |
1008 | ||
1009 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
1010 | continue; | |
1011 | ||
1012 | if (c->dfs_cac_ms > dfs_cac_ms) | |
1013 | dfs_cac_ms = c->dfs_cac_ms; | |
1014 | } | |
1015 | ||
1016 | return dfs_cac_ms; | |
1017 | } | |
1018 | ||
1019 | unsigned int | |
1020 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
1021 | const struct cfg80211_chan_def *chandef) | |
1022 | { | |
1023 | int width; | |
1024 | unsigned int t1 = 0, t2 = 0; | |
1025 | ||
1026 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
1027 | return 0; | |
1028 | ||
1029 | width = cfg80211_chandef_get_width(chandef); | |
1030 | if (width < 0) | |
1031 | return 0; | |
1032 | ||
1033 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1034 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
1035 | width); |
1036 | ||
1037 | if (!chandef->center_freq2) | |
1038 | return t1; | |
1039 | ||
1040 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1041 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
1042 | width); |
1043 | ||
1044 | return max(t1, t2); | |
1045 | } | |
30ca8b0c | 1046 | EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time); |
6bc54fbc JD |
1047 | |
1048 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
1049 | u32 center_freq, u32 bandwidth, | |
1050 | u32 prohibited_flags) | |
1051 | { | |
1052 | struct ieee80211_channel *c; | |
1053 | u32 freq, start_freq, end_freq; | |
04f39047 | 1054 | |
6bc54fbc JD |
1055 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
1056 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1057 | ||
934f4c7d TP |
1058 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1059 | c = ieee80211_get_channel_khz(wiphy, freq); | |
6bc54fbc | 1060 | if (!c || c->flags & prohibited_flags) |
3d9d1d66 | 1061 | return false; |
9236d838 LR |
1062 | } |
1063 | ||
3d9d1d66 JB |
1064 | return true; |
1065 | } | |
1066 | ||
2a38075c AAL |
1067 | /* check if the operating channels are valid and supported */ |
1068 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
1069 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
1070 | int primary_channel, | |
1071 | struct ieee80211_edmg *edmg_cap) | |
1072 | { | |
1073 | struct ieee80211_channel *chan; | |
1074 | int i, freq; | |
1075 | int channels_counter = 0; | |
1076 | ||
1077 | if (!edmg_channels && !edmg_bw_config) | |
1078 | return true; | |
1079 | ||
1080 | if ((!edmg_channels && edmg_bw_config) || | |
1081 | (edmg_channels && !edmg_bw_config)) | |
1082 | return false; | |
1083 | ||
1084 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
1085 | return false; | |
1086 | ||
1087 | /* 60GHz channels 1..6 */ | |
1088 | for (i = 0; i < 6; i++) { | |
1089 | if (!(edmg_channels & BIT(i))) | |
1090 | continue; | |
1091 | ||
1092 | if (!(edmg_cap->channels & BIT(i))) | |
1093 | return false; | |
1094 | ||
1095 | channels_counter++; | |
1096 | ||
1097 | freq = ieee80211_channel_to_frequency(i + 1, | |
1098 | NL80211_BAND_60GHZ); | |
1099 | chan = ieee80211_get_channel(wiphy, freq); | |
1100 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
1101 | return false; | |
1102 | } | |
1103 | ||
1104 | /* IEEE802.11 allows max 4 channels */ | |
1105 | if (channels_counter > 4) | |
1106 | return false; | |
1107 | ||
1108 | /* check bw_config is a subset of what driver supports | |
1109 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
1110 | */ | |
1111 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
1112 | return false; | |
1113 | ||
1114 | if (edmg_bw_config > edmg_cap->bw_config) | |
1115 | return false; | |
1116 | ||
1117 | return true; | |
1118 | } | |
1119 | ||
9f5e8f6e JB |
1120 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
1121 | const struct cfg80211_chan_def *chandef, | |
1122 | u32 prohibited_flags) | |
3d9d1d66 | 1123 | { |
9f5e8f6e JB |
1124 | struct ieee80211_sta_ht_cap *ht_cap; |
1125 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 1126 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 1127 | u32 width, control_freq, cap; |
3743bec6 JD |
1128 | bool ext_nss_cap, support_80_80 = false, support_320 = false; |
1129 | const struct ieee80211_sband_iftype_data *iftd; | |
1130 | struct ieee80211_supported_band *sband; | |
1131 | int i; | |
3d9d1d66 | 1132 | |
9f5e8f6e JB |
1133 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
1134 | return false; | |
3d9d1d66 | 1135 | |
9f5e8f6e JB |
1136 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
1137 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c | 1138 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
e6ed929b WG |
1139 | ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) & |
1140 | IEEE80211_VHT_EXT_NSS_BW_CAPABLE; | |
2a38075c AAL |
1141 | |
1142 | if (edmg_cap->channels && | |
1143 | !cfg80211_edmg_usable(wiphy, | |
1144 | chandef->edmg.channels, | |
1145 | chandef->edmg.bw_config, | |
1146 | chandef->chan->hw_value, | |
1147 | edmg_cap)) | |
1148 | return false; | |
3d9d1d66 | 1149 | |
9f5e8f6e | 1150 | control_freq = chandef->chan->center_freq; |
9236d838 | 1151 | |
3d9d1d66 | 1152 | switch (chandef->width) { |
df78a0c0 TP |
1153 | case NL80211_CHAN_WIDTH_1: |
1154 | width = 1; | |
1155 | break; | |
1156 | case NL80211_CHAN_WIDTH_2: | |
1157 | width = 2; | |
1158 | break; | |
1159 | case NL80211_CHAN_WIDTH_4: | |
1160 | width = 4; | |
1161 | break; | |
1162 | case NL80211_CHAN_WIDTH_8: | |
1163 | width = 8; | |
1164 | break; | |
1165 | case NL80211_CHAN_WIDTH_16: | |
1166 | width = 16; | |
1167 | break; | |
2f301ab2 SW |
1168 | case NL80211_CHAN_WIDTH_5: |
1169 | width = 5; | |
1170 | break; | |
1171 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 1172 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
1173 | width = 10; |
1174 | break; | |
3d9d1d66 | 1175 | case NL80211_CHAN_WIDTH_20: |
ba8f6a03 JB |
1176 | if (!ht_cap->ht_supported && |
1177 | chandef->chan->band != NL80211_BAND_6GHZ) | |
9f5e8f6e | 1178 | return false; |
df561f66 | 1179 | fallthrough; |
9f5e8f6e | 1180 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 1181 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
1182 | width = 20; |
1183 | break; | |
1184 | case NL80211_CHAN_WIDTH_40: | |
1185 | width = 40; | |
ba8f6a03 JB |
1186 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1187 | break; | |
9f5e8f6e JB |
1188 | if (!ht_cap->ht_supported) |
1189 | return false; | |
1190 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
1191 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
1192 | return false; | |
1193 | if (chandef->center_freq1 < control_freq && | |
1194 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
1195 | return false; | |
1196 | if (chandef->center_freq1 > control_freq && | |
1197 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
1198 | return false; | |
3d9d1d66 | 1199 | break; |
3d9d1d66 | 1200 | case NL80211_CHAN_WIDTH_80P80: |
35799944 SB |
1201 | cap = vht_cap->cap; |
1202 | support_80_80 = | |
1203 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || | |
1204 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
1205 | cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || | |
e6ed929b WG |
1206 | (ext_nss_cap && |
1207 | u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1); | |
35799944 | 1208 | if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80) |
9f5e8f6e | 1209 | return false; |
df561f66 | 1210 | fallthrough; |
9f5e8f6e | 1211 | case NL80211_CHAN_WIDTH_80: |
c7a6ee27 | 1212 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 | 1213 | width = 80; |
ba8f6a03 JB |
1214 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1215 | break; | |
1216 | if (!vht_cap->vht_supported) | |
1217 | return false; | |
3d9d1d66 JB |
1218 | break; |
1219 | case NL80211_CHAN_WIDTH_160: | |
ba8f6a03 JB |
1220 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
1221 | width = 160; | |
1222 | if (chandef->chan->band == NL80211_BAND_6GHZ) | |
1223 | break; | |
9f5e8f6e JB |
1224 | if (!vht_cap->vht_supported) |
1225 | return false; | |
08f6f147 JM |
1226 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
1227 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
35799944 | 1228 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ && |
e6ed929b WG |
1229 | !(ext_nss_cap && |
1230 | (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) | |
9f5e8f6e | 1231 | return false; |
3d9d1d66 | 1232 | break; |
3743bec6 JD |
1233 | case NL80211_CHAN_WIDTH_320: |
1234 | prohibited_flags |= IEEE80211_CHAN_NO_320MHZ; | |
1235 | width = 320; | |
1236 | ||
1237 | if (chandef->chan->band != NL80211_BAND_6GHZ) | |
1238 | return false; | |
1239 | ||
1240 | sband = wiphy->bands[NL80211_BAND_6GHZ]; | |
1241 | if (!sband) | |
1242 | return false; | |
1243 | ||
e8c18412 | 1244 | for_each_sband_iftype_data(sband, i, iftd) { |
3743bec6 JD |
1245 | if (!iftd->eht_cap.has_eht) |
1246 | continue; | |
1247 | ||
1248 | if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] & | |
1249 | IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) { | |
1250 | support_320 = true; | |
1251 | break; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | if (!support_320) | |
1256 | return false; | |
1257 | break; | |
3d9d1d66 JB |
1258 | default: |
1259 | WARN_ON_ONCE(1); | |
9236d838 | 1260 | return false; |
4ee3e063 | 1261 | } |
3d9d1d66 | 1262 | |
c7a6ee27 JB |
1263 | /* |
1264 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
1265 | * allowed by the driver, or only certain combinations? | |
1266 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
1267 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
1268 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
1269 | * no way to cover 80+80 MHz or more complex restrictions. | |
1270 | * Note that such restrictions also need to be advertised to | |
1271 | * userspace, for example for P2P channel selection. | |
1272 | */ | |
9f5e8f6e | 1273 | |
a6662dba JB |
1274 | if (width > 20) |
1275 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1276 | ||
2f301ab2 SW |
1277 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
1278 | if (width < 20) | |
1279 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1280 | ||
1281 | ||
934f4c7d TP |
1282 | if (!cfg80211_secondary_chans_ok(wiphy, |
1283 | ieee80211_chandef_to_khz(chandef), | |
9f5e8f6e JB |
1284 | width, prohibited_flags)) |
1285 | return false; | |
1286 | ||
1287 | if (!chandef->center_freq2) | |
1288 | return true; | |
934f4c7d TP |
1289 | return cfg80211_secondary_chans_ok(wiphy, |
1290 | MHZ_TO_KHZ(chandef->center_freq2), | |
9f5e8f6e JB |
1291 | width, prohibited_flags); |
1292 | } | |
1293 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
1294 | ||
7b0a0e3c JB |
1295 | static bool cfg80211_ir_permissive_check_wdev(enum nl80211_iftype iftype, |
1296 | struct wireless_dev *wdev, | |
1297 | struct ieee80211_channel *chan) | |
1298 | { | |
1299 | struct ieee80211_channel *other_chan = NULL; | |
1300 | unsigned int link_id; | |
1301 | int r1, r2; | |
1302 | ||
1303 | for_each_valid_link(wdev, link_id) { | |
1304 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1305 | wdev->links[link_id].client.current_bss) | |
1306 | other_chan = wdev->links[link_id].client.current_bss->pub.channel; | |
1307 | ||
1308 | /* | |
1309 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1310 | * this one (maybe the same one) can beacon as well. We allow | |
1311 | * the operation even if the station we relied on with | |
1312 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1313 | * we're not outdoor on an indoor-only channel. | |
1314 | */ | |
1315 | if (iftype == NL80211_IFTYPE_P2P_GO && | |
1316 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
1317 | wdev->links[link_id].ap.beacon_interval && | |
1318 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1319 | other_chan = wdev->links[link_id].ap.chandef.chan; | |
1320 | ||
1321 | if (!other_chan) | |
1322 | continue; | |
1323 | ||
1324 | if (chan == other_chan) | |
1325 | return true; | |
1326 | ||
1327 | if (chan->band != NL80211_BAND_5GHZ && | |
1328 | chan->band != NL80211_BAND_6GHZ) | |
1329 | continue; | |
1330 | ||
1331 | r1 = cfg80211_get_unii(chan->center_freq); | |
1332 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1333 | ||
1334 | if (r1 != -EINVAL && r1 == r2) { | |
1335 | /* | |
1336 | * At some locations channels 149-165 are considered a | |
1337 | * bundle, but at other locations, e.g., Indonesia, | |
1338 | * channels 149-161 are considered a bundle while | |
1339 | * channel 165 is left out and considered to be in a | |
1340 | * different bundle. Thus, in case that there is a | |
1341 | * station interface connected to an AP on channel 165, | |
1342 | * it is assumed that channels 149-161 are allowed for | |
1343 | * GO operations. However, having a station interface | |
1344 | * connected to an AP on channels 149-161, does not | |
1345 | * allow GO operation on channel 165. | |
1346 | */ | |
1347 | if (chan->center_freq == 5825 && | |
1348 | other_chan->center_freq != 5825) | |
1349 | continue; | |
1350 | return true; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | return false; | |
1355 | } | |
1356 | ||
174e0cd2 | 1357 | /* |
06f207fc AN |
1358 | * Check if the channel can be used under permissive conditions mandated by |
1359 | * some regulatory bodies, i.e., the channel is marked with | |
1360 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1361 | * associated to an AP on the same channel or on the same UNII band |
1362 | * (assuming that the AP is an authorized master). | |
06f207fc | 1363 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1364 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1365 | */ |
06f207fc AN |
1366 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1367 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1368 | struct ieee80211_channel *chan) |
1369 | { | |
be69c24a | 1370 | struct wireless_dev *wdev; |
06f207fc | 1371 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 | 1372 | |
a05829a7 | 1373 | lockdep_assert_held(&rdev->wiphy.mtx); |
174e0cd2 | 1374 | |
97f2645f | 1375 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1376 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1377 | return false; | |
1378 | ||
06f207fc AN |
1379 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1380 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1381 | iftype != NL80211_IFTYPE_STATION && | |
1382 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1383 | return false; | |
1384 | ||
c8866e55 IP |
1385 | if (regulatory_indoor_allowed() && |
1386 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1387 | return true; | |
1388 | ||
06f207fc | 1389 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1390 | return false; |
1391 | ||
1392 | /* | |
1393 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1394 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1395 | * enforce the relaxation (by doing a similar verifications as this), |
1396 | * and thus fail the GO instantiation, consider only the interfaces of | |
1397 | * the current registered device. | |
1398 | */ | |
53873f13 | 1399 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
7b0a0e3c | 1400 | bool ret; |
174e0cd2 | 1401 | |
7b0a0e3c | 1402 | ret = cfg80211_ir_permissive_check_wdev(iftype, wdev, chan); |
7b0a0e3c JB |
1403 | if (ret) |
1404 | return ret; | |
174e0cd2 IP |
1405 | } |
1406 | ||
1407 | return false; | |
1408 | } | |
1409 | ||
923b352f AN |
1410 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1411 | struct cfg80211_chan_def *chandef, | |
1412 | enum nl80211_iftype iftype, | |
1413 | bool check_no_ir) | |
9f5e8f6e JB |
1414 | { |
1415 | bool res; | |
41a313d8 AO |
1416 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED; |
1417 | int dfs_required; | |
9f5e8f6e | 1418 | |
923b352f | 1419 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1420 | |
923b352f | 1421 | if (check_no_ir) |
174e0cd2 | 1422 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1423 | |
41a313d8 AO |
1424 | dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype); |
1425 | if (dfs_required != 0) | |
1426 | prohibited_flags |= IEEE80211_CHAN_RADAR; | |
1427 | ||
1428 | if (dfs_required > 0 && | |
6bc54fbc JD |
1429 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1430 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1431 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1432 | } | |
1433 | ||
1434 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1435 | |
1436 | trace_cfg80211_return_bool(res); | |
1437 | return res; | |
9236d838 | 1438 | } |
923b352f AN |
1439 | |
1440 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1441 | struct cfg80211_chan_def *chandef, | |
1442 | enum nl80211_iftype iftype) | |
1443 | { | |
1444 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1445 | } | |
683b6d3b | 1446 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1447 | |
923b352f AN |
1448 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1449 | struct cfg80211_chan_def *chandef, | |
1450 | enum nl80211_iftype iftype) | |
1451 | { | |
a05829a7 | 1452 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
923b352f AN |
1453 | bool check_no_ir; |
1454 | ||
a05829a7 | 1455 | lockdep_assert_held(&rdev->wiphy.mtx); |
923b352f AN |
1456 | |
1457 | /* | |
1458 | * Under certain conditions suggested by some regulatory bodies a | |
1459 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1460 | * only if such relaxations are not enabled and the conditions are not | |
1461 | * met. | |
1462 | */ | |
1463 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1464 | chandef->chan); | |
1465 | ||
1466 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1467 | } | |
1468 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1469 | ||
e8c9bd5b | 1470 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1471 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1472 | { |
e8c9bd5b | 1473 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1474 | return -EOPNOTSUPP; |
4f03c1ed MK |
1475 | if (!cfg80211_has_monitors_only(rdev)) |
1476 | return -EBUSY; | |
9588bbd5 | 1477 | |
683b6d3b | 1478 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1479 | } |
26ab9a0c | 1480 | |
be989891 JB |
1481 | bool cfg80211_any_usable_channels(struct wiphy *wiphy, |
1482 | unsigned long sband_mask, | |
1483 | u32 prohibited_flags) | |
1484 | { | |
1485 | int idx; | |
1486 | ||
1487 | prohibited_flags |= IEEE80211_CHAN_DISABLED; | |
1488 | ||
1489 | for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) { | |
1490 | struct ieee80211_supported_band *sband = wiphy->bands[idx]; | |
1491 | int chanidx; | |
1492 | ||
1493 | if (!sband) | |
1494 | continue; | |
1495 | ||
1496 | for (chanidx = 0; chanidx < sband->n_channels; chanidx++) { | |
1497 | struct ieee80211_channel *chan; | |
1498 | ||
1499 | chan = &sband->channels[chanidx]; | |
1500 | ||
1501 | if (chan->flags & prohibited_flags) | |
1502 | continue; | |
1503 | ||
1504 | return true; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | return false; | |
1509 | } | |
1510 | EXPORT_SYMBOL(cfg80211_any_usable_channels); | |
7b0a0e3c JB |
1511 | |
1512 | struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev, | |
1513 | unsigned int link_id) | |
1514 | { | |
076fc877 JB |
1515 | lockdep_assert_wiphy(wdev->wiphy); |
1516 | ||
1517 | WARN_ON(wdev->valid_links && !(wdev->valid_links & BIT(link_id))); | |
1518 | WARN_ON(!wdev->valid_links && link_id > 0); | |
7b0a0e3c JB |
1519 | |
1520 | switch (wdev->iftype) { | |
1521 | case NL80211_IFTYPE_MESH_POINT: | |
1522 | return &wdev->u.mesh.chandef; | |
1523 | case NL80211_IFTYPE_ADHOC: | |
1524 | return &wdev->u.ibss.chandef; | |
1525 | case NL80211_IFTYPE_OCB: | |
1526 | return &wdev->u.ocb.chandef; | |
1527 | case NL80211_IFTYPE_AP: | |
1528 | case NL80211_IFTYPE_P2P_GO: | |
1529 | return &wdev->links[link_id].ap.chandef; | |
1530 | default: | |
1531 | return NULL; | |
1532 | } | |
1533 | } | |
1534 | EXPORT_SYMBOL(wdev_chandef); | |
b25413fe AD |
1535 | |
1536 | struct cfg80211_per_bw_puncturing_values { | |
1537 | u8 len; | |
1538 | const u16 *valid_values; | |
1539 | }; | |
1540 | ||
1541 | static const u16 puncturing_values_80mhz[] = { | |
1542 | 0x8, 0x4, 0x2, 0x1 | |
1543 | }; | |
1544 | ||
1545 | static const u16 puncturing_values_160mhz[] = { | |
1546 | 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3 | |
1547 | }; | |
1548 | ||
1549 | static const u16 puncturing_values_320mhz[] = { | |
1550 | 0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00, | |
1551 | 0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f, | |
1552 | 0x300f, 0xc0f, 0x30f, 0xcf, 0x3f | |
1553 | }; | |
1554 | ||
1555 | #define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \ | |
1556 | { \ | |
1557 | .len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \ | |
1558 | .valid_values = puncturing_values_ ## _bw ## mhz \ | |
1559 | } | |
1560 | ||
1561 | static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = { | |
1562 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80), | |
1563 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160), | |
1564 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320) | |
1565 | }; | |
1566 | ||
1567 | bool cfg80211_valid_disable_subchannel_bitmap(u16 *bitmap, | |
1568 | const struct cfg80211_chan_def *chandef) | |
1569 | { | |
1570 | u32 idx, i, start_freq; | |
1571 | ||
1572 | switch (chandef->width) { | |
1573 | case NL80211_CHAN_WIDTH_80: | |
1574 | idx = 0; | |
1575 | start_freq = chandef->center_freq1 - 40; | |
1576 | break; | |
1577 | case NL80211_CHAN_WIDTH_160: | |
1578 | idx = 1; | |
1579 | start_freq = chandef->center_freq1 - 80; | |
1580 | break; | |
1581 | case NL80211_CHAN_WIDTH_320: | |
1582 | idx = 2; | |
1583 | start_freq = chandef->center_freq1 - 160; | |
1584 | break; | |
1585 | default: | |
1586 | *bitmap = 0; | |
1587 | break; | |
1588 | } | |
1589 | ||
1590 | if (!*bitmap) | |
1591 | return true; | |
1592 | ||
1593 | /* check if primary channel is punctured */ | |
1594 | if (*bitmap & (u16)BIT((chandef->chan->center_freq - start_freq) / 20)) | |
1595 | return false; | |
1596 | ||
1597 | for (i = 0; i < per_bw_puncturing[idx].len; i++) | |
1598 | if (per_bw_puncturing[idx].valid_values[i] == *bitmap) | |
1599 | return true; | |
1600 | ||
1601 | return false; | |
1602 | } | |
1603 | EXPORT_SYMBOL(cfg80211_valid_disable_subchannel_bitmap); |