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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 | ||
719036ae JB |
59 | struct cfg80211_per_bw_puncturing_values { |
60 | u8 len; | |
61 | const u16 *valid_values; | |
62 | }; | |
63 | ||
64 | static const u16 puncturing_values_80mhz[] = { | |
65 | 0x8, 0x4, 0x2, 0x1 | |
66 | }; | |
67 | ||
68 | static const u16 puncturing_values_160mhz[] = { | |
69 | 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3 | |
70 | }; | |
71 | ||
72 | static const u16 puncturing_values_320mhz[] = { | |
73 | 0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00, | |
74 | 0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f, | |
75 | 0x300f, 0xc0f, 0x30f, 0xcf, 0x3f | |
76 | }; | |
77 | ||
78 | #define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \ | |
79 | { \ | |
80 | .len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \ | |
81 | .valid_values = puncturing_values_ ## _bw ## mhz \ | |
82 | } | |
83 | ||
84 | static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = { | |
85 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80), | |
86 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160), | |
87 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320) | |
88 | }; | |
89 | ||
90 | bool cfg80211_valid_disable_subchannel_bitmap(u16 *bitmap, | |
91 | const struct cfg80211_chan_def *chandef) | |
92 | { | |
93 | u32 idx, i, start_freq; | |
94 | ||
95 | switch (chandef->width) { | |
96 | case NL80211_CHAN_WIDTH_80: | |
97 | idx = 0; | |
98 | start_freq = chandef->center_freq1 - 40; | |
99 | break; | |
100 | case NL80211_CHAN_WIDTH_160: | |
101 | idx = 1; | |
102 | start_freq = chandef->center_freq1 - 80; | |
103 | break; | |
104 | case NL80211_CHAN_WIDTH_320: | |
105 | idx = 2; | |
106 | start_freq = chandef->center_freq1 - 160; | |
107 | break; | |
108 | default: | |
109 | *bitmap = 0; | |
110 | break; | |
111 | } | |
112 | ||
113 | if (!*bitmap) | |
114 | return true; | |
115 | ||
116 | /* check if primary channel is punctured */ | |
117 | if (*bitmap & (u16)BIT((chandef->chan->center_freq - start_freq) / 20)) | |
118 | return false; | |
119 | ||
120 | for (i = 0; i < per_bw_puncturing[idx].len; i++) | |
121 | if (per_bw_puncturing[idx].valid_values[i] == *bitmap) | |
122 | return true; | |
123 | ||
124 | return false; | |
125 | } | |
126 | EXPORT_SYMBOL(cfg80211_valid_disable_subchannel_bitmap); | |
127 | ||
2a38075c AAL |
128 | static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) |
129 | { | |
130 | int max_contiguous = 0; | |
131 | int num_of_enabled = 0; | |
132 | int contiguous = 0; | |
133 | int i; | |
134 | ||
135 | if (!chandef->edmg.channels || !chandef->edmg.bw_config) | |
136 | return false; | |
137 | ||
138 | if (!cfg80211_valid_60g_freq(chandef->chan->center_freq)) | |
139 | return false; | |
140 | ||
141 | for (i = 0; i < 6; i++) { | |
142 | if (chandef->edmg.channels & BIT(i)) { | |
143 | contiguous++; | |
144 | num_of_enabled++; | |
145 | } else { | |
146 | contiguous = 0; | |
147 | } | |
148 | ||
149 | max_contiguous = max(contiguous, max_contiguous); | |
150 | } | |
151 | /* basic verification of edmg configuration according to | |
152 | * IEEE P802.11ay/D4.0 section 9.4.2.251 | |
153 | */ | |
154 | /* check bw_config against contiguous edmg channels */ | |
155 | switch (chandef->edmg.bw_config) { | |
156 | case IEEE80211_EDMG_BW_CONFIG_4: | |
157 | case IEEE80211_EDMG_BW_CONFIG_8: | |
158 | case IEEE80211_EDMG_BW_CONFIG_12: | |
159 | if (max_contiguous < 1) | |
160 | return false; | |
161 | break; | |
162 | case IEEE80211_EDMG_BW_CONFIG_5: | |
163 | case IEEE80211_EDMG_BW_CONFIG_9: | |
164 | case IEEE80211_EDMG_BW_CONFIG_13: | |
165 | if (max_contiguous < 2) | |
166 | return false; | |
167 | break; | |
168 | case IEEE80211_EDMG_BW_CONFIG_6: | |
169 | case IEEE80211_EDMG_BW_CONFIG_10: | |
170 | case IEEE80211_EDMG_BW_CONFIG_14: | |
171 | if (max_contiguous < 3) | |
172 | return false; | |
173 | break; | |
174 | case IEEE80211_EDMG_BW_CONFIG_7: | |
175 | case IEEE80211_EDMG_BW_CONFIG_11: | |
176 | case IEEE80211_EDMG_BW_CONFIG_15: | |
177 | if (max_contiguous < 4) | |
178 | return false; | |
179 | break; | |
180 | ||
181 | default: | |
182 | return false; | |
183 | } | |
184 | ||
185 | /* check bw_config against aggregated (non contiguous) edmg channels */ | |
186 | switch (chandef->edmg.bw_config) { | |
187 | case IEEE80211_EDMG_BW_CONFIG_4: | |
188 | case IEEE80211_EDMG_BW_CONFIG_5: | |
189 | case IEEE80211_EDMG_BW_CONFIG_6: | |
190 | case IEEE80211_EDMG_BW_CONFIG_7: | |
191 | break; | |
192 | case IEEE80211_EDMG_BW_CONFIG_8: | |
193 | case IEEE80211_EDMG_BW_CONFIG_9: | |
194 | case IEEE80211_EDMG_BW_CONFIG_10: | |
195 | case IEEE80211_EDMG_BW_CONFIG_11: | |
196 | if (num_of_enabled < 2) | |
197 | return false; | |
198 | break; | |
199 | case IEEE80211_EDMG_BW_CONFIG_12: | |
200 | case IEEE80211_EDMG_BW_CONFIG_13: | |
201 | case IEEE80211_EDMG_BW_CONFIG_14: | |
202 | case IEEE80211_EDMG_BW_CONFIG_15: | |
203 | if (num_of_enabled < 4 || max_contiguous < 2) | |
204 | return false; | |
205 | break; | |
206 | default: | |
207 | return false; | |
208 | } | |
209 | ||
210 | return true; | |
211 | } | |
212 | ||
10fa22b6 | 213 | int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width) |
11b34737 TP |
214 | { |
215 | int mhz; | |
216 | ||
217 | switch (chan_width) { | |
218 | case NL80211_CHAN_WIDTH_1: | |
219 | mhz = 1; | |
220 | break; | |
221 | case NL80211_CHAN_WIDTH_2: | |
222 | mhz = 2; | |
223 | break; | |
224 | case NL80211_CHAN_WIDTH_4: | |
225 | mhz = 4; | |
226 | break; | |
227 | case NL80211_CHAN_WIDTH_8: | |
228 | mhz = 8; | |
229 | break; | |
230 | case NL80211_CHAN_WIDTH_16: | |
231 | mhz = 16; | |
232 | break; | |
233 | case NL80211_CHAN_WIDTH_5: | |
234 | mhz = 5; | |
235 | break; | |
236 | case NL80211_CHAN_WIDTH_10: | |
237 | mhz = 10; | |
238 | break; | |
239 | case NL80211_CHAN_WIDTH_20: | |
240 | case NL80211_CHAN_WIDTH_20_NOHT: | |
241 | mhz = 20; | |
242 | break; | |
243 | case NL80211_CHAN_WIDTH_40: | |
244 | mhz = 40; | |
245 | break; | |
246 | case NL80211_CHAN_WIDTH_80P80: | |
247 | case NL80211_CHAN_WIDTH_80: | |
248 | mhz = 80; | |
249 | break; | |
250 | case NL80211_CHAN_WIDTH_160: | |
251 | mhz = 160; | |
252 | break; | |
3743bec6 JD |
253 | case NL80211_CHAN_WIDTH_320: |
254 | mhz = 320; | |
255 | break; | |
11b34737 TP |
256 | default: |
257 | WARN_ON_ONCE(1); | |
258 | return -1; | |
259 | } | |
260 | return mhz; | |
261 | } | |
10fa22b6 | 262 | EXPORT_SYMBOL(nl80211_chan_width_to_mhz); |
11b34737 TP |
263 | |
264 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) | |
265 | { | |
266 | return nl80211_chan_width_to_mhz(c->width); | |
267 | } | |
268 | ||
9f5e8f6e | 269 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 | 270 | { |
11b34737 TP |
271 | u32 control_freq, oper_freq; |
272 | int oper_width, control_width; | |
3d9d1d66 JB |
273 | |
274 | if (!chandef->chan) | |
275 | return false; | |
276 | ||
be689f68 JB |
277 | if (chandef->freq1_offset >= 1000) |
278 | return false; | |
279 | ||
3d9d1d66 JB |
280 | control_freq = chandef->chan->center_freq; |
281 | ||
282 | switch (chandef->width) { | |
2f301ab2 SW |
283 | case NL80211_CHAN_WIDTH_5: |
284 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
285 | case NL80211_CHAN_WIDTH_20: |
286 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
287 | if (ieee80211_chandef_to_khz(chandef) != |
288 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
289 | return false; |
290 | if (chandef->center_freq2) | |
291 | return false; | |
292 | break; | |
c1cd35c6 | 293 | case NL80211_CHAN_WIDTH_1: |
11b34737 TP |
294 | case NL80211_CHAN_WIDTH_2: |
295 | case NL80211_CHAN_WIDTH_4: | |
296 | case NL80211_CHAN_WIDTH_8: | |
297 | case NL80211_CHAN_WIDTH_16: | |
c1cd35c6 TP |
298 | if (chandef->chan->band != NL80211_BAND_S1GHZ) |
299 | return false; | |
300 | ||
11b34737 TP |
301 | control_freq = ieee80211_channel_to_khz(chandef->chan); |
302 | oper_freq = ieee80211_chandef_to_khz(chandef); | |
303 | control_width = nl80211_chan_width_to_mhz( | |
304 | ieee80211_s1g_channel_width( | |
305 | chandef->chan)); | |
306 | oper_width = cfg80211_chandef_get_width(chandef); | |
307 | ||
308 | if (oper_width < 0 || control_width < 0) | |
309 | return false; | |
310 | if (chandef->center_freq2) | |
311 | return false; | |
312 | ||
313 | if (control_freq + MHZ_TO_KHZ(control_width) / 2 > | |
314 | oper_freq + MHZ_TO_KHZ(oper_width) / 2) | |
315 | return false; | |
316 | ||
317 | if (control_freq - MHZ_TO_KHZ(control_width) / 2 < | |
318 | oper_freq - MHZ_TO_KHZ(oper_width) / 2) | |
319 | return false; | |
320 | break; | |
3d9d1d66 | 321 | case NL80211_CHAN_WIDTH_80P80: |
3d9d1d66 JB |
322 | if (!chandef->center_freq2) |
323 | return false; | |
9cab3151 JB |
324 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
325 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
326 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
327 | return false; | |
3d9d1d66 | 328 | break; |
3bb1ccc4 | 329 | default: |
3d9d1d66 JB |
330 | if (chandef->center_freq2) |
331 | return false; | |
332 | break; | |
3bb1ccc4 JB |
333 | } |
334 | ||
335 | switch (chandef->width) { | |
336 | case NL80211_CHAN_WIDTH_5: | |
337 | case NL80211_CHAN_WIDTH_10: | |
338 | case NL80211_CHAN_WIDTH_20: | |
339 | case NL80211_CHAN_WIDTH_20_NOHT: | |
340 | case NL80211_CHAN_WIDTH_1: | |
341 | case NL80211_CHAN_WIDTH_2: | |
342 | case NL80211_CHAN_WIDTH_4: | |
343 | case NL80211_CHAN_WIDTH_8: | |
344 | case NL80211_CHAN_WIDTH_16: | |
345 | /* all checked above */ | |
3d9d1d66 | 346 | break; |
3743bec6 JD |
347 | case NL80211_CHAN_WIDTH_320: |
348 | if (chandef->center_freq1 == control_freq + 150 || | |
349 | chandef->center_freq1 == control_freq + 130 || | |
350 | chandef->center_freq1 == control_freq + 110 || | |
351 | chandef->center_freq1 == control_freq + 90 || | |
352 | chandef->center_freq1 == control_freq - 90 || | |
353 | chandef->center_freq1 == control_freq - 110 || | |
354 | chandef->center_freq1 == control_freq - 130 || | |
355 | chandef->center_freq1 == control_freq - 150) | |
356 | break; | |
357 | fallthrough; | |
3bb1ccc4 JB |
358 | case NL80211_CHAN_WIDTH_160: |
359 | if (chandef->center_freq1 == control_freq + 70 || | |
360 | chandef->center_freq1 == control_freq + 50 || | |
361 | chandef->center_freq1 == control_freq - 50 || | |
362 | chandef->center_freq1 == control_freq - 70) | |
363 | break; | |
364 | fallthrough; | |
365 | case NL80211_CHAN_WIDTH_80P80: | |
366 | case NL80211_CHAN_WIDTH_80: | |
367 | if (chandef->center_freq1 == control_freq + 30 || | |
368 | chandef->center_freq1 == control_freq - 30) | |
369 | break; | |
370 | fallthrough; | |
371 | case NL80211_CHAN_WIDTH_40: | |
372 | if (chandef->center_freq1 == control_freq + 10 || | |
373 | chandef->center_freq1 == control_freq - 10) | |
374 | break; | |
375 | fallthrough; | |
3d9d1d66 JB |
376 | default: |
377 | return false; | |
378 | } | |
379 | ||
ec649fed MH |
380 | /* channel 14 is only for IEEE 802.11b */ |
381 | if (chandef->center_freq1 == 2484 && | |
382 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
383 | return false; | |
384 | ||
2a38075c AAL |
385 | if (cfg80211_chandef_is_edmg(chandef) && |
386 | !cfg80211_edmg_chandef_valid(chandef)) | |
387 | return false; | |
388 | ||
3d9d1d66 JB |
389 | return true; |
390 | } | |
9f5e8f6e | 391 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 | 392 | |
8f251a0a JB |
393 | int cfg80211_chandef_primary_freq(const struct cfg80211_chan_def *c, |
394 | enum nl80211_chan_width primary_chan_width) | |
3d9d1d66 | 395 | { |
8f251a0a JB |
396 | int pri_width = nl80211_chan_width_to_mhz(primary_chan_width); |
397 | int width = cfg80211_chandef_get_width(c); | |
398 | u32 control = c->chan->center_freq; | |
399 | u32 center = c->center_freq1; | |
3d9d1d66 | 400 | |
8f251a0a JB |
401 | if (WARN_ON_ONCE(pri_width < 0 || width < 0)) |
402 | return -1; | |
403 | ||
404 | /* not intended to be called this way, can't determine */ | |
405 | if (WARN_ON_ONCE(pri_width > width)) | |
406 | return -1; | |
407 | ||
408 | while (width > pri_width) { | |
409 | if (control > center) | |
410 | center += width / 4; | |
411 | else | |
412 | center -= width / 4; | |
413 | width /= 2; | |
3d9d1d66 | 414 | } |
8f251a0a JB |
415 | |
416 | return center; | |
3d9d1d66 | 417 | } |
8f251a0a | 418 | EXPORT_SYMBOL(cfg80211_chandef_primary_freq); |
3d9d1d66 | 419 | |
8f251a0a JB |
420 | static const struct cfg80211_chan_def * |
421 | check_chandef_primary_compat(const struct cfg80211_chan_def *c1, | |
422 | const struct cfg80211_chan_def *c2, | |
423 | enum nl80211_chan_width primary_chan_width) | |
3d9d1d66 | 424 | { |
8f251a0a JB |
425 | /* check primary is compatible -> error if not */ |
426 | if (cfg80211_chandef_primary_freq(c1, primary_chan_width) != | |
427 | cfg80211_chandef_primary_freq(c2, primary_chan_width)) | |
428 | return ERR_PTR(-EINVAL); | |
429 | ||
430 | /* assumes c1 is smaller width, if that was just checked -> done */ | |
431 | if (c1->width == primary_chan_width) | |
432 | return c2; | |
433 | ||
434 | /* otherwise continue checking the next width */ | |
435 | return NULL; | |
436 | } | |
437 | ||
438 | static const struct cfg80211_chan_def * | |
439 | _cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
440 | const struct cfg80211_chan_def *c2) | |
441 | { | |
442 | const struct cfg80211_chan_def *ret; | |
3d9d1d66 JB |
443 | |
444 | /* If they are identical, return */ | |
445 | if (cfg80211_chandef_identical(c1, c2)) | |
8f251a0a | 446 | return c2; |
3d9d1d66 JB |
447 | |
448 | /* otherwise, must have same control channel */ | |
449 | if (c1->chan != c2->chan) | |
450 | return NULL; | |
451 | ||
452 | /* | |
453 | * If they have the same width, but aren't identical, | |
454 | * then they can't be compatible. | |
455 | */ | |
456 | if (c1->width == c2->width) | |
457 | return NULL; | |
458 | ||
2f301ab2 | 459 | /* |
b9d908dc | 460 | * can't be compatible if one of them is 5/10 MHz or S1G |
2f301ab2 SW |
461 | * but they don't have the same width. |
462 | */ | |
b9d908dc JB |
463 | #define NARROW_OR_S1G(width) ((width) == NL80211_CHAN_WIDTH_5 || \ |
464 | (width) == NL80211_CHAN_WIDTH_10 || \ | |
465 | (width) == NL80211_CHAN_WIDTH_1 || \ | |
466 | (width) == NL80211_CHAN_WIDTH_2 || \ | |
467 | (width) == NL80211_CHAN_WIDTH_4 || \ | |
468 | (width) == NL80211_CHAN_WIDTH_8 || \ | |
469 | (width) == NL80211_CHAN_WIDTH_16) | |
470 | ||
471 | if (NARROW_OR_S1G(c1->width) || NARROW_OR_S1G(c2->width)) | |
2f301ab2 SW |
472 | return NULL; |
473 | ||
8f251a0a JB |
474 | /* |
475 | * Make sure that c1 is always the narrower one, so that later | |
476 | * we either return NULL or c2 and don't have to check both | |
477 | * directions. | |
478 | */ | |
479 | if (c1->width > c2->width) | |
480 | swap(c1, c2); | |
481 | ||
482 | /* | |
483 | * No further checks needed if the "narrower" one is only 20 MHz. | |
484 | * Here "narrower" includes being a 20 MHz non-HT channel vs. a | |
485 | * 20 MHz HT (or later) one. | |
486 | */ | |
487 | if (c1->width <= NL80211_CHAN_WIDTH_20) | |
3d9d1d66 JB |
488 | return c2; |
489 | ||
8f251a0a JB |
490 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_40); |
491 | if (ret) | |
492 | return ret; | |
3d9d1d66 | 493 | |
8f251a0a JB |
494 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_80); |
495 | if (ret) | |
496 | return ret; | |
3d9d1d66 | 497 | |
8f251a0a JB |
498 | /* |
499 | * If c1 is 80+80, then c2 is 160 or higher, but that cannot | |
500 | * match. If c2 was also 80+80 it was already either accepted | |
501 | * or rejected above (identical or not, respectively.) | |
502 | */ | |
503 | if (c1->width == NL80211_CHAN_WIDTH_80P80) | |
3d9d1d66 JB |
504 | return NULL; |
505 | ||
8f251a0a JB |
506 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_160); |
507 | if (ret) | |
508 | return ret; | |
3743bec6 | 509 | |
8f251a0a JB |
510 | /* |
511 | * Getting here would mean they're both wider than 160, have the | |
512 | * same primary 160, but are not identical - this cannot happen | |
513 | * since they must be 320 (no wider chandefs exist, at least yet.) | |
514 | */ | |
515 | WARN_ON_ONCE(1); | |
3743bec6 | 516 | |
8f251a0a JB |
517 | return NULL; |
518 | } | |
3743bec6 | 519 | |
8f251a0a JB |
520 | const struct cfg80211_chan_def * |
521 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
522 | const struct cfg80211_chan_def *c2) | |
523 | { | |
524 | const struct cfg80211_chan_def *ret; | |
3743bec6 | 525 | |
8f251a0a JB |
526 | ret = _cfg80211_chandef_compatible(c1, c2); |
527 | if (IS_ERR(ret)) | |
3d9d1d66 | 528 | return NULL; |
8f251a0a | 529 | return ret; |
3d9d1d66 JB |
530 | } |
531 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
532 | ||
04f39047 SW |
533 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
534 | u32 bandwidth, | |
535 | enum nl80211_dfs_state dfs_state) | |
536 | { | |
537 | struct ieee80211_channel *c; | |
538 | u32 freq; | |
539 | ||
540 | for (freq = center_freq - bandwidth/2 + 10; | |
541 | freq <= center_freq + bandwidth/2 - 10; | |
542 | freq += 20) { | |
543 | c = ieee80211_get_channel(wiphy, freq); | |
544 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
545 | continue; | |
546 | ||
547 | c->dfs_state = dfs_state; | |
548 | c->dfs_state_entered = jiffies; | |
549 | } | |
550 | } | |
551 | ||
552 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
553 | const struct cfg80211_chan_def *chandef, | |
554 | enum nl80211_dfs_state dfs_state) | |
555 | { | |
556 | int width; | |
557 | ||
558 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
559 | return; | |
560 | ||
561 | width = cfg80211_chandef_get_width(chandef); | |
562 | if (width < 0) | |
563 | return; | |
564 | ||
565 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
566 | width, dfs_state); | |
567 | ||
568 | if (!chandef->center_freq2) | |
569 | return; | |
570 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
571 | width, dfs_state); | |
572 | } | |
573 | ||
40d1ba63 JD |
574 | static u32 cfg80211_get_start_freq(u32 center_freq, |
575 | u32 bandwidth) | |
576 | { | |
577 | u32 start_freq; | |
578 | ||
934f4c7d TP |
579 | bandwidth = MHZ_TO_KHZ(bandwidth); |
580 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
581 | start_freq = center_freq; |
582 | else | |
934f4c7d | 583 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
584 | |
585 | return start_freq; | |
586 | } | |
587 | ||
588 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
589 | u32 bandwidth) | |
590 | { | |
591 | u32 end_freq; | |
592 | ||
934f4c7d TP |
593 | bandwidth = MHZ_TO_KHZ(bandwidth); |
594 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
595 | end_freq = center_freq; |
596 | else | |
934f4c7d | 597 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
598 | |
599 | return end_freq; | |
600 | } | |
601 | ||
41a313d8 AO |
602 | static bool |
603 | cfg80211_dfs_permissive_check_wdev(struct cfg80211_registered_device *rdev, | |
604 | enum nl80211_iftype iftype, | |
605 | struct wireless_dev *wdev, | |
606 | struct ieee80211_channel *chan) | |
607 | { | |
608 | unsigned int link_id; | |
609 | ||
610 | for_each_valid_link(wdev, link_id) { | |
611 | struct ieee80211_channel *other_chan = NULL; | |
612 | struct cfg80211_chan_def chandef = {}; | |
613 | int ret; | |
614 | ||
615 | /* In order to avoid daisy chaining only allow BSS STA */ | |
616 | if (wdev->iftype != NL80211_IFTYPE_STATION || | |
617 | !wdev->links[link_id].client.current_bss) | |
618 | continue; | |
619 | ||
620 | other_chan = | |
621 | wdev->links[link_id].client.current_bss->pub.channel; | |
622 | ||
623 | if (!other_chan) | |
624 | continue; | |
625 | ||
626 | if (chan == other_chan) | |
627 | return true; | |
628 | ||
629 | /* continue if we can't get the channel */ | |
630 | ret = rdev_get_channel(rdev, wdev, link_id, &chandef); | |
631 | if (ret) | |
632 | continue; | |
633 | ||
634 | if (cfg80211_is_sub_chan(&chandef, chan, false)) | |
635 | return true; | |
636 | } | |
637 | ||
638 | return false; | |
639 | } | |
640 | ||
641 | /* | |
642 | * Check if P2P GO is allowed to operate on a DFS channel | |
643 | */ | |
644 | static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy, | |
645 | enum nl80211_iftype iftype, | |
646 | struct ieee80211_channel *chan) | |
647 | { | |
648 | struct wireless_dev *wdev; | |
649 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
650 | ||
651 | lockdep_assert_held(&rdev->wiphy.mtx); | |
652 | ||
653 | if (!wiphy_ext_feature_isset(&rdev->wiphy, | |
654 | NL80211_EXT_FEATURE_DFS_CONCURRENT) || | |
655 | !(chan->flags & IEEE80211_CHAN_DFS_CONCURRENT)) | |
656 | return false; | |
657 | ||
658 | /* only valid for P2P GO */ | |
659 | if (iftype != NL80211_IFTYPE_P2P_GO) | |
660 | return false; | |
661 | ||
662 | /* | |
663 | * Allow only if there's a concurrent BSS | |
664 | */ | |
665 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
666 | bool ret = cfg80211_dfs_permissive_check_wdev(rdev, iftype, | |
667 | wdev, chan); | |
668 | if (ret) | |
669 | return ret; | |
670 | } | |
671 | ||
672 | return false; | |
673 | } | |
674 | ||
04f39047 SW |
675 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
676 | u32 center_freq, | |
41a313d8 AO |
677 | u32 bandwidth, |
678 | enum nl80211_iftype iftype) | |
04f39047 SW |
679 | { |
680 | struct ieee80211_channel *c; | |
2f301ab2 SW |
681 | u32 freq, start_freq, end_freq; |
682 | ||
40d1ba63 JD |
683 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
684 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 685 | |
934f4c7d TP |
686 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
687 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
688 | if (!c) |
689 | return -EINVAL; | |
690 | ||
41a313d8 AO |
691 | if (c->flags & IEEE80211_CHAN_RADAR && |
692 | !cfg80211_dfs_permissive_chan(wiphy, iftype, c)) | |
04f39047 SW |
693 | return 1; |
694 | } | |
41a313d8 | 695 | |
04f39047 SW |
696 | return 0; |
697 | } | |
698 | ||
699 | ||
700 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
701 | const struct cfg80211_chan_def *chandef, |
702 | enum nl80211_iftype iftype) | |
04f39047 SW |
703 | { |
704 | int width; | |
2beb6dab | 705 | int ret; |
04f39047 SW |
706 | |
707 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
708 | return -EINVAL; | |
709 | ||
2beb6dab LC |
710 | switch (iftype) { |
711 | case NL80211_IFTYPE_ADHOC: | |
712 | case NL80211_IFTYPE_AP: | |
713 | case NL80211_IFTYPE_P2P_GO: | |
714 | case NL80211_IFTYPE_MESH_POINT: | |
715 | width = cfg80211_chandef_get_width(chandef); | |
716 | if (width < 0) | |
717 | return -EINVAL; | |
04f39047 | 718 | |
2beb6dab | 719 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d | 720 | ieee80211_chandef_to_khz(chandef), |
41a313d8 | 721 | width, iftype); |
2beb6dab LC |
722 | if (ret < 0) |
723 | return ret; | |
724 | else if (ret > 0) | |
725 | return BIT(chandef->width); | |
04f39047 | 726 | |
2beb6dab LC |
727 | if (!chandef->center_freq2) |
728 | return 0; | |
729 | ||
730 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d | 731 | MHZ_TO_KHZ(chandef->center_freq2), |
41a313d8 | 732 | width, iftype); |
2beb6dab LC |
733 | if (ret < 0) |
734 | return ret; | |
735 | else if (ret > 0) | |
736 | return BIT(chandef->width); | |
04f39047 | 737 | |
2beb6dab LC |
738 | break; |
739 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 740 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
741 | case NL80211_IFTYPE_P2P_CLIENT: |
742 | case NL80211_IFTYPE_MONITOR: | |
743 | case NL80211_IFTYPE_AP_VLAN: | |
2beb6dab | 744 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 745 | case NL80211_IFTYPE_NAN: |
2beb6dab | 746 | break; |
e7e0517c | 747 | case NL80211_IFTYPE_WDS: |
00ec75fc | 748 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
749 | case NUM_NL80211_IFTYPES: |
750 | WARN_ON(1); | |
751 | } | |
752 | ||
753 | return 0; | |
04f39047 | 754 | } |
774f0734 | 755 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 756 | |
fe7c3a1f JD |
757 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
758 | u32 center_freq, | |
759 | u32 bandwidth) | |
760 | { | |
761 | struct ieee80211_channel *c; | |
762 | u32 freq, start_freq, end_freq; | |
763 | int count = 0; | |
764 | ||
765 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
766 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
767 | ||
768 | /* | |
769 | * Check entire range of channels for the bandwidth. | |
770 | * Check all channels are DFS channels (DFS_USABLE or | |
771 | * DFS_AVAILABLE). Return number of usable channels | |
772 | * (require CAC). Allow DFS and non-DFS channel mix. | |
773 | */ | |
934f4c7d TP |
774 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
775 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
776 | if (!c) |
777 | return -EINVAL; | |
778 | ||
779 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
780 | return -EINVAL; | |
781 | ||
782 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
783 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
784 | return -EINVAL; | |
785 | ||
786 | if (c->dfs_state == NL80211_DFS_USABLE) | |
787 | count++; | |
788 | } | |
789 | } | |
790 | ||
791 | return count; | |
792 | } | |
793 | ||
794 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
795 | const struct cfg80211_chan_def *chandef) | |
796 | { | |
797 | int width; | |
798 | int r1, r2 = 0; | |
799 | ||
800 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
801 | return false; | |
802 | ||
803 | width = cfg80211_chandef_get_width(chandef); | |
804 | if (width < 0) | |
805 | return false; | |
806 | ||
934f4c7d TP |
807 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
808 | MHZ_TO_KHZ(chandef->center_freq1), | |
809 | width); | |
fe7c3a1f JD |
810 | |
811 | if (r1 < 0) | |
812 | return false; | |
813 | ||
814 | switch (chandef->width) { | |
815 | case NL80211_CHAN_WIDTH_80P80: | |
816 | WARN_ON(!chandef->center_freq2); | |
817 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
818 | MHZ_TO_KHZ(chandef->center_freq2), |
819 | width); | |
fe7c3a1f JD |
820 | if (r2 < 0) |
821 | return false; | |
822 | break; | |
823 | default: | |
824 | WARN_ON(chandef->center_freq2); | |
825 | break; | |
826 | } | |
827 | ||
828 | return (r1 + r2 > 0); | |
829 | } | |
30ca8b0c | 830 | EXPORT_SYMBOL(cfg80211_chandef_dfs_usable); |
fe7c3a1f | 831 | |
b35a51c7 VT |
832 | /* |
833 | * Checks if center frequency of chan falls with in the bandwidth | |
834 | * range of chandef. | |
835 | */ | |
836 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
7b0a0e3c JB |
837 | struct ieee80211_channel *chan, |
838 | bool primary_only) | |
b35a51c7 VT |
839 | { |
840 | int width; | |
a67a4893 | 841 | u32 freq; |
b35a51c7 | 842 | |
7b0a0e3c JB |
843 | if (!chandef->chan) |
844 | return false; | |
845 | ||
b35a51c7 VT |
846 | if (chandef->chan->center_freq == chan->center_freq) |
847 | return true; | |
848 | ||
7b0a0e3c JB |
849 | if (primary_only) |
850 | return false; | |
851 | ||
b35a51c7 VT |
852 | width = cfg80211_chandef_get_width(chandef); |
853 | if (width <= 20) | |
854 | return false; | |
855 | ||
b35a51c7 VT |
856 | for (freq = chandef->center_freq1 - width / 2 + 10; |
857 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
858 | if (chan->center_freq == freq) | |
859 | return true; | |
860 | } | |
861 | ||
862 | if (!chandef->center_freq2) | |
863 | return false; | |
864 | ||
865 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
866 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
867 | if (chan->center_freq == freq) | |
868 | return true; | |
869 | } | |
870 | ||
871 | return false; | |
872 | } | |
873 | ||
874 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
875 | { | |
7b0a0e3c | 876 | unsigned int link; |
b35a51c7 | 877 | |
076fc877 | 878 | lockdep_assert_wiphy(wdev->wiphy); |
b35a51c7 | 879 | |
b35a51c7 VT |
880 | switch (wdev->iftype) { |
881 | case NL80211_IFTYPE_AP: | |
882 | case NL80211_IFTYPE_P2P_GO: | |
7b0a0e3c JB |
883 | for_each_valid_link(wdev, link) { |
884 | if (wdev->links[link].ap.beacon_interval) | |
885 | return true; | |
886 | } | |
b35a51c7 VT |
887 | break; |
888 | case NL80211_IFTYPE_ADHOC: | |
7b0a0e3c JB |
889 | if (wdev->u.ibss.ssid_len) |
890 | return true; | |
b35a51c7 VT |
891 | break; |
892 | case NL80211_IFTYPE_MESH_POINT: | |
7b0a0e3c JB |
893 | if (wdev->u.mesh.id_len) |
894 | return true; | |
b35a51c7 VT |
895 | break; |
896 | case NL80211_IFTYPE_STATION: | |
897 | case NL80211_IFTYPE_OCB: | |
898 | case NL80211_IFTYPE_P2P_CLIENT: | |
899 | case NL80211_IFTYPE_MONITOR: | |
900 | case NL80211_IFTYPE_AP_VLAN: | |
b35a51c7 VT |
901 | case NL80211_IFTYPE_P2P_DEVICE: |
902 | /* Can NAN type be considered as beaconing interface? */ | |
903 | case NL80211_IFTYPE_NAN: | |
904 | break; | |
905 | case NL80211_IFTYPE_UNSPECIFIED: | |
e7e0517c | 906 | case NL80211_IFTYPE_WDS: |
b35a51c7 VT |
907 | case NUM_NL80211_IFTYPES: |
908 | WARN_ON(1); | |
909 | } | |
910 | ||
7b0a0e3c JB |
911 | return false; |
912 | } | |
913 | ||
914 | bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, | |
915 | struct ieee80211_channel *chan, | |
916 | bool primary_only) | |
917 | { | |
918 | unsigned int link; | |
919 | ||
920 | switch (wdev->iftype) { | |
921 | case NL80211_IFTYPE_AP: | |
922 | case NL80211_IFTYPE_P2P_GO: | |
923 | for_each_valid_link(wdev, link) { | |
924 | if (cfg80211_is_sub_chan(&wdev->links[link].ap.chandef, | |
925 | chan, primary_only)) | |
926 | return true; | |
927 | } | |
928 | break; | |
929 | case NL80211_IFTYPE_ADHOC: | |
930 | return cfg80211_is_sub_chan(&wdev->u.ibss.chandef, chan, | |
931 | primary_only); | |
932 | case NL80211_IFTYPE_MESH_POINT: | |
933 | return cfg80211_is_sub_chan(&wdev->u.mesh.chandef, chan, | |
934 | primary_only); | |
935 | default: | |
936 | break; | |
937 | } | |
938 | ||
939 | return false; | |
b35a51c7 VT |
940 | } |
941 | ||
89766727 VT |
942 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
943 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
944 | { |
945 | struct wireless_dev *wdev; | |
946 | ||
076fc877 JB |
947 | lockdep_assert_wiphy(wiphy); |
948 | ||
b35a51c7 | 949 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
076fc877 | 950 | if (!cfg80211_beaconing_iface_active(wdev)) |
b35a51c7 | 951 | continue; |
b35a51c7 | 952 | |
076fc877 | 953 | if (cfg80211_wdev_on_sub_chan(wdev, chan, false)) |
b35a51c7 | 954 | return true; |
b35a51c7 VT |
955 | } |
956 | ||
957 | return false; | |
958 | } | |
fe7c3a1f | 959 | |
84158164 LB |
960 | static bool |
961 | cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev, | |
962 | struct ieee80211_channel *channel) | |
963 | { | |
a95bfb87 | 964 | if (!rdev->background_radar_wdev) |
84158164 LB |
965 | return false; |
966 | ||
a95bfb87 | 967 | if (!cfg80211_chandef_valid(&rdev->background_radar_chandef)) |
84158164 LB |
968 | return false; |
969 | ||
7b0a0e3c JB |
970 | return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel, |
971 | false); | |
84158164 LB |
972 | } |
973 | ||
89766727 VT |
974 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
975 | struct ieee80211_channel *chan) | |
976 | { | |
977 | struct cfg80211_registered_device *rdev; | |
978 | ||
979 | ASSERT_RTNL(); | |
980 | ||
981 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
982 | return false; | |
983 | ||
7483a214 | 984 | for_each_rdev(rdev) { |
fa8809a5 JB |
985 | bool found; |
986 | ||
89766727 VT |
987 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) |
988 | continue; | |
989 | ||
fa8809a5 JB |
990 | wiphy_lock(&rdev->wiphy); |
991 | found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) || | |
992 | cfg80211_offchan_chain_is_active(rdev, chan); | |
993 | wiphy_unlock(&rdev->wiphy); | |
84158164 | 994 | |
fa8809a5 | 995 | if (found) |
84158164 | 996 | return true; |
89766727 VT |
997 | } |
998 | ||
999 | return false; | |
1000 | } | |
1001 | ||
6bc54fbc JD |
1002 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
1003 | u32 center_freq, | |
1004 | u32 bandwidth) | |
3d9d1d66 JB |
1005 | { |
1006 | struct ieee80211_channel *c; | |
2f301ab2 | 1007 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
1008 | bool dfs_offload; |
1009 | ||
1010 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
1011 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 1012 | |
40d1ba63 JD |
1013 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
1014 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 1015 | |
6bc54fbc JD |
1016 | /* |
1017 | * Check entire range of channels for the bandwidth. | |
1018 | * If any channel in between is disabled or has not | |
1019 | * had gone through CAC return false | |
1020 | */ | |
934f4c7d TP |
1021 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1022 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
1023 | if (!c) |
1024 | return false; | |
1025 | ||
6bc54fbc JD |
1026 | if (c->flags & IEEE80211_CHAN_DISABLED) |
1027 | return false; | |
1028 | ||
2c390e44 DL |
1029 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
1030 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
1031 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 1032 | return false; |
6bc54fbc JD |
1033 | } |
1034 | ||
1035 | return true; | |
1036 | } | |
1037 | ||
1038 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
1039 | const struct cfg80211_chan_def *chandef) | |
1040 | { | |
1041 | int width; | |
1042 | int r; | |
1043 | ||
1044 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
1045 | return false; | |
1046 | ||
1047 | width = cfg80211_chandef_get_width(chandef); | |
1048 | if (width < 0) | |
1049 | return false; | |
1050 | ||
934f4c7d TP |
1051 | r = cfg80211_get_chans_dfs_available(wiphy, |
1052 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
1053 | width); |
1054 | ||
1055 | /* If any of channels unavailable for cf1 just return */ | |
1056 | if (!r) | |
1057 | return r; | |
1058 | ||
1059 | switch (chandef->width) { | |
1060 | case NL80211_CHAN_WIDTH_80P80: | |
1061 | WARN_ON(!chandef->center_freq2); | |
1062 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
1063 | MHZ_TO_KHZ(chandef->center_freq2), |
1064 | width); | |
680682d4 | 1065 | break; |
6bc54fbc JD |
1066 | default: |
1067 | WARN_ON(chandef->center_freq2); | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | return r; | |
1072 | } | |
1073 | ||
31559f35 JD |
1074 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
1075 | u32 center_freq, | |
1076 | u32 bandwidth) | |
1077 | { | |
1078 | struct ieee80211_channel *c; | |
1079 | u32 start_freq, end_freq, freq; | |
1080 | unsigned int dfs_cac_ms = 0; | |
1081 | ||
1082 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
1083 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1084 | ||
934f4c7d TP |
1085 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1086 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
1087 | if (!c) |
1088 | return 0; | |
1089 | ||
1090 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
1091 | return 0; | |
1092 | ||
1093 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
1094 | continue; | |
1095 | ||
1096 | if (c->dfs_cac_ms > dfs_cac_ms) | |
1097 | dfs_cac_ms = c->dfs_cac_ms; | |
1098 | } | |
1099 | ||
1100 | return dfs_cac_ms; | |
1101 | } | |
1102 | ||
1103 | unsigned int | |
1104 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
1105 | const struct cfg80211_chan_def *chandef) | |
1106 | { | |
1107 | int width; | |
1108 | unsigned int t1 = 0, t2 = 0; | |
1109 | ||
1110 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
1111 | return 0; | |
1112 | ||
1113 | width = cfg80211_chandef_get_width(chandef); | |
1114 | if (width < 0) | |
1115 | return 0; | |
1116 | ||
1117 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1118 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
1119 | width); |
1120 | ||
1121 | if (!chandef->center_freq2) | |
1122 | return t1; | |
1123 | ||
1124 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1125 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
1126 | width); |
1127 | ||
1128 | return max(t1, t2); | |
1129 | } | |
30ca8b0c | 1130 | EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time); |
6bc54fbc JD |
1131 | |
1132 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
1133 | u32 center_freq, u32 bandwidth, | |
1134 | u32 prohibited_flags) | |
1135 | { | |
1136 | struct ieee80211_channel *c; | |
1137 | u32 freq, start_freq, end_freq; | |
04f39047 | 1138 | |
6bc54fbc JD |
1139 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
1140 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1141 | ||
934f4c7d TP |
1142 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1143 | c = ieee80211_get_channel_khz(wiphy, freq); | |
6bc54fbc | 1144 | if (!c || c->flags & prohibited_flags) |
3d9d1d66 | 1145 | return false; |
9236d838 LR |
1146 | } |
1147 | ||
3d9d1d66 JB |
1148 | return true; |
1149 | } | |
1150 | ||
2a38075c AAL |
1151 | /* check if the operating channels are valid and supported */ |
1152 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
1153 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
1154 | int primary_channel, | |
1155 | struct ieee80211_edmg *edmg_cap) | |
1156 | { | |
1157 | struct ieee80211_channel *chan; | |
1158 | int i, freq; | |
1159 | int channels_counter = 0; | |
1160 | ||
1161 | if (!edmg_channels && !edmg_bw_config) | |
1162 | return true; | |
1163 | ||
1164 | if ((!edmg_channels && edmg_bw_config) || | |
1165 | (edmg_channels && !edmg_bw_config)) | |
1166 | return false; | |
1167 | ||
1168 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
1169 | return false; | |
1170 | ||
1171 | /* 60GHz channels 1..6 */ | |
1172 | for (i = 0; i < 6; i++) { | |
1173 | if (!(edmg_channels & BIT(i))) | |
1174 | continue; | |
1175 | ||
1176 | if (!(edmg_cap->channels & BIT(i))) | |
1177 | return false; | |
1178 | ||
1179 | channels_counter++; | |
1180 | ||
1181 | freq = ieee80211_channel_to_frequency(i + 1, | |
1182 | NL80211_BAND_60GHZ); | |
1183 | chan = ieee80211_get_channel(wiphy, freq); | |
1184 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
1185 | return false; | |
1186 | } | |
1187 | ||
1188 | /* IEEE802.11 allows max 4 channels */ | |
1189 | if (channels_counter > 4) | |
1190 | return false; | |
1191 | ||
1192 | /* check bw_config is a subset of what driver supports | |
1193 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
1194 | */ | |
1195 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
1196 | return false; | |
1197 | ||
1198 | if (edmg_bw_config > edmg_cap->bw_config) | |
1199 | return false; | |
1200 | ||
1201 | return true; | |
1202 | } | |
1203 | ||
9f5e8f6e JB |
1204 | bool cfg80211_chandef_usable(struct wiphy *wiphy, |
1205 | const struct cfg80211_chan_def *chandef, | |
1206 | u32 prohibited_flags) | |
3d9d1d66 | 1207 | { |
9f5e8f6e JB |
1208 | struct ieee80211_sta_ht_cap *ht_cap; |
1209 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 1210 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 1211 | u32 width, control_freq, cap; |
3743bec6 JD |
1212 | bool ext_nss_cap, support_80_80 = false, support_320 = false; |
1213 | const struct ieee80211_sband_iftype_data *iftd; | |
1214 | struct ieee80211_supported_band *sband; | |
1215 | int i; | |
3d9d1d66 | 1216 | |
9f5e8f6e JB |
1217 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
1218 | return false; | |
3d9d1d66 | 1219 | |
9f5e8f6e JB |
1220 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
1221 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c | 1222 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
e6ed929b WG |
1223 | ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) & |
1224 | IEEE80211_VHT_EXT_NSS_BW_CAPABLE; | |
2a38075c AAL |
1225 | |
1226 | if (edmg_cap->channels && | |
1227 | !cfg80211_edmg_usable(wiphy, | |
1228 | chandef->edmg.channels, | |
1229 | chandef->edmg.bw_config, | |
1230 | chandef->chan->hw_value, | |
1231 | edmg_cap)) | |
1232 | return false; | |
3d9d1d66 | 1233 | |
9f5e8f6e | 1234 | control_freq = chandef->chan->center_freq; |
9236d838 | 1235 | |
3d9d1d66 | 1236 | switch (chandef->width) { |
df78a0c0 TP |
1237 | case NL80211_CHAN_WIDTH_1: |
1238 | width = 1; | |
1239 | break; | |
1240 | case NL80211_CHAN_WIDTH_2: | |
1241 | width = 2; | |
1242 | break; | |
1243 | case NL80211_CHAN_WIDTH_4: | |
1244 | width = 4; | |
1245 | break; | |
1246 | case NL80211_CHAN_WIDTH_8: | |
1247 | width = 8; | |
1248 | break; | |
1249 | case NL80211_CHAN_WIDTH_16: | |
1250 | width = 16; | |
1251 | break; | |
2f301ab2 SW |
1252 | case NL80211_CHAN_WIDTH_5: |
1253 | width = 5; | |
1254 | break; | |
1255 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 1256 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
1257 | width = 10; |
1258 | break; | |
3d9d1d66 | 1259 | case NL80211_CHAN_WIDTH_20: |
ba8f6a03 JB |
1260 | if (!ht_cap->ht_supported && |
1261 | chandef->chan->band != NL80211_BAND_6GHZ) | |
9f5e8f6e | 1262 | return false; |
df561f66 | 1263 | fallthrough; |
9f5e8f6e | 1264 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 1265 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
1266 | width = 20; |
1267 | break; | |
1268 | case NL80211_CHAN_WIDTH_40: | |
1269 | width = 40; | |
ba8f6a03 JB |
1270 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1271 | break; | |
9f5e8f6e JB |
1272 | if (!ht_cap->ht_supported) |
1273 | return false; | |
1274 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
1275 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
1276 | return false; | |
1277 | if (chandef->center_freq1 < control_freq && | |
1278 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
1279 | return false; | |
1280 | if (chandef->center_freq1 > control_freq && | |
1281 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
1282 | return false; | |
3d9d1d66 | 1283 | break; |
3d9d1d66 | 1284 | case NL80211_CHAN_WIDTH_80P80: |
35799944 SB |
1285 | cap = vht_cap->cap; |
1286 | support_80_80 = | |
1287 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || | |
1288 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
1289 | cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || | |
e6ed929b WG |
1290 | (ext_nss_cap && |
1291 | u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1); | |
35799944 | 1292 | if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80) |
9f5e8f6e | 1293 | return false; |
df561f66 | 1294 | fallthrough; |
9f5e8f6e | 1295 | case NL80211_CHAN_WIDTH_80: |
c7a6ee27 | 1296 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 | 1297 | width = 80; |
ba8f6a03 JB |
1298 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1299 | break; | |
1300 | if (!vht_cap->vht_supported) | |
1301 | return false; | |
3d9d1d66 JB |
1302 | break; |
1303 | case NL80211_CHAN_WIDTH_160: | |
ba8f6a03 JB |
1304 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
1305 | width = 160; | |
1306 | if (chandef->chan->band == NL80211_BAND_6GHZ) | |
1307 | break; | |
9f5e8f6e JB |
1308 | if (!vht_cap->vht_supported) |
1309 | return false; | |
08f6f147 JM |
1310 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
1311 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
35799944 | 1312 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ && |
e6ed929b WG |
1313 | !(ext_nss_cap && |
1314 | (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) | |
9f5e8f6e | 1315 | return false; |
3d9d1d66 | 1316 | break; |
3743bec6 JD |
1317 | case NL80211_CHAN_WIDTH_320: |
1318 | prohibited_flags |= IEEE80211_CHAN_NO_320MHZ; | |
1319 | width = 320; | |
1320 | ||
1321 | if (chandef->chan->band != NL80211_BAND_6GHZ) | |
1322 | return false; | |
1323 | ||
1324 | sband = wiphy->bands[NL80211_BAND_6GHZ]; | |
1325 | if (!sband) | |
1326 | return false; | |
1327 | ||
e8c18412 | 1328 | for_each_sband_iftype_data(sband, i, iftd) { |
3743bec6 JD |
1329 | if (!iftd->eht_cap.has_eht) |
1330 | continue; | |
1331 | ||
1332 | if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] & | |
1333 | IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) { | |
1334 | support_320 = true; | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | if (!support_320) | |
1340 | return false; | |
1341 | break; | |
3d9d1d66 JB |
1342 | default: |
1343 | WARN_ON_ONCE(1); | |
9236d838 | 1344 | return false; |
4ee3e063 | 1345 | } |
3d9d1d66 | 1346 | |
c7a6ee27 JB |
1347 | /* |
1348 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
1349 | * allowed by the driver, or only certain combinations? | |
1350 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
1351 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
1352 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
1353 | * no way to cover 80+80 MHz or more complex restrictions. | |
1354 | * Note that such restrictions also need to be advertised to | |
1355 | * userspace, for example for P2P channel selection. | |
1356 | */ | |
9f5e8f6e | 1357 | |
a6662dba JB |
1358 | if (width > 20) |
1359 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1360 | ||
2f301ab2 SW |
1361 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
1362 | if (width < 20) | |
1363 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1364 | ||
1365 | ||
934f4c7d TP |
1366 | if (!cfg80211_secondary_chans_ok(wiphy, |
1367 | ieee80211_chandef_to_khz(chandef), | |
9f5e8f6e JB |
1368 | width, prohibited_flags)) |
1369 | return false; | |
1370 | ||
1371 | if (!chandef->center_freq2) | |
1372 | return true; | |
934f4c7d TP |
1373 | return cfg80211_secondary_chans_ok(wiphy, |
1374 | MHZ_TO_KHZ(chandef->center_freq2), | |
9f5e8f6e JB |
1375 | width, prohibited_flags); |
1376 | } | |
1377 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
1378 | ||
7b0a0e3c JB |
1379 | static bool cfg80211_ir_permissive_check_wdev(enum nl80211_iftype iftype, |
1380 | struct wireless_dev *wdev, | |
1381 | struct ieee80211_channel *chan) | |
1382 | { | |
1383 | struct ieee80211_channel *other_chan = NULL; | |
1384 | unsigned int link_id; | |
1385 | int r1, r2; | |
1386 | ||
1387 | for_each_valid_link(wdev, link_id) { | |
1388 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1389 | wdev->links[link_id].client.current_bss) | |
1390 | other_chan = wdev->links[link_id].client.current_bss->pub.channel; | |
1391 | ||
1392 | /* | |
1393 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1394 | * this one (maybe the same one) can beacon as well. We allow | |
1395 | * the operation even if the station we relied on with | |
1396 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1397 | * we're not outdoor on an indoor-only channel. | |
1398 | */ | |
1399 | if (iftype == NL80211_IFTYPE_P2P_GO && | |
1400 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
1401 | wdev->links[link_id].ap.beacon_interval && | |
1402 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1403 | other_chan = wdev->links[link_id].ap.chandef.chan; | |
1404 | ||
1405 | if (!other_chan) | |
1406 | continue; | |
1407 | ||
1408 | if (chan == other_chan) | |
1409 | return true; | |
1410 | ||
1411 | if (chan->band != NL80211_BAND_5GHZ && | |
1412 | chan->band != NL80211_BAND_6GHZ) | |
1413 | continue; | |
1414 | ||
1415 | r1 = cfg80211_get_unii(chan->center_freq); | |
1416 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1417 | ||
1418 | if (r1 != -EINVAL && r1 == r2) { | |
1419 | /* | |
1420 | * At some locations channels 149-165 are considered a | |
1421 | * bundle, but at other locations, e.g., Indonesia, | |
1422 | * channels 149-161 are considered a bundle while | |
1423 | * channel 165 is left out and considered to be in a | |
1424 | * different bundle. Thus, in case that there is a | |
1425 | * station interface connected to an AP on channel 165, | |
1426 | * it is assumed that channels 149-161 are allowed for | |
1427 | * GO operations. However, having a station interface | |
1428 | * connected to an AP on channels 149-161, does not | |
1429 | * allow GO operation on channel 165. | |
1430 | */ | |
1431 | if (chan->center_freq == 5825 && | |
1432 | other_chan->center_freq != 5825) | |
1433 | continue; | |
1434 | return true; | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | return false; | |
1439 | } | |
1440 | ||
174e0cd2 | 1441 | /* |
06f207fc AN |
1442 | * Check if the channel can be used under permissive conditions mandated by |
1443 | * some regulatory bodies, i.e., the channel is marked with | |
1444 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1445 | * associated to an AP on the same channel or on the same UNII band |
1446 | * (assuming that the AP is an authorized master). | |
06f207fc | 1447 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1448 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1449 | */ |
06f207fc AN |
1450 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1451 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1452 | struct ieee80211_channel *chan) |
1453 | { | |
be69c24a | 1454 | struct wireless_dev *wdev; |
06f207fc | 1455 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 | 1456 | |
a05829a7 | 1457 | lockdep_assert_held(&rdev->wiphy.mtx); |
174e0cd2 | 1458 | |
97f2645f | 1459 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1460 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1461 | return false; | |
1462 | ||
06f207fc AN |
1463 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1464 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1465 | iftype != NL80211_IFTYPE_STATION && | |
1466 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1467 | return false; | |
1468 | ||
c8866e55 IP |
1469 | if (regulatory_indoor_allowed() && |
1470 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1471 | return true; | |
1472 | ||
06f207fc | 1473 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1474 | return false; |
1475 | ||
1476 | /* | |
1477 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1478 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1479 | * enforce the relaxation (by doing a similar verifications as this), |
1480 | * and thus fail the GO instantiation, consider only the interfaces of | |
1481 | * the current registered device. | |
1482 | */ | |
53873f13 | 1483 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
7b0a0e3c | 1484 | bool ret; |
174e0cd2 | 1485 | |
7b0a0e3c | 1486 | ret = cfg80211_ir_permissive_check_wdev(iftype, wdev, chan); |
7b0a0e3c JB |
1487 | if (ret) |
1488 | return ret; | |
174e0cd2 IP |
1489 | } |
1490 | ||
1491 | return false; | |
1492 | } | |
1493 | ||
923b352f AN |
1494 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1495 | struct cfg80211_chan_def *chandef, | |
1496 | enum nl80211_iftype iftype, | |
1497 | bool check_no_ir) | |
9f5e8f6e JB |
1498 | { |
1499 | bool res; | |
41a313d8 AO |
1500 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED; |
1501 | int dfs_required; | |
9f5e8f6e | 1502 | |
923b352f | 1503 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1504 | |
923b352f | 1505 | if (check_no_ir) |
174e0cd2 | 1506 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1507 | |
41a313d8 AO |
1508 | dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype); |
1509 | if (dfs_required != 0) | |
1510 | prohibited_flags |= IEEE80211_CHAN_RADAR; | |
1511 | ||
1512 | if (dfs_required > 0 && | |
6bc54fbc JD |
1513 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1514 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1515 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1516 | } | |
1517 | ||
1518 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1519 | |
1520 | trace_cfg80211_return_bool(res); | |
1521 | return res; | |
9236d838 | 1522 | } |
923b352f AN |
1523 | |
1524 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1525 | struct cfg80211_chan_def *chandef, | |
1526 | enum nl80211_iftype iftype) | |
1527 | { | |
1528 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1529 | } | |
683b6d3b | 1530 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1531 | |
923b352f AN |
1532 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1533 | struct cfg80211_chan_def *chandef, | |
1534 | enum nl80211_iftype iftype) | |
1535 | { | |
a05829a7 | 1536 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
923b352f AN |
1537 | bool check_no_ir; |
1538 | ||
a05829a7 | 1539 | lockdep_assert_held(&rdev->wiphy.mtx); |
923b352f AN |
1540 | |
1541 | /* | |
1542 | * Under certain conditions suggested by some regulatory bodies a | |
1543 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1544 | * only if such relaxations are not enabled and the conditions are not | |
1545 | * met. | |
1546 | */ | |
1547 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1548 | chandef->chan); | |
1549 | ||
1550 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1551 | } | |
1552 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1553 | ||
e8c9bd5b | 1554 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1555 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1556 | { |
e8c9bd5b | 1557 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1558 | return -EOPNOTSUPP; |
4f03c1ed MK |
1559 | if (!cfg80211_has_monitors_only(rdev)) |
1560 | return -EBUSY; | |
9588bbd5 | 1561 | |
683b6d3b | 1562 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1563 | } |
26ab9a0c | 1564 | |
be989891 JB |
1565 | bool cfg80211_any_usable_channels(struct wiphy *wiphy, |
1566 | unsigned long sband_mask, | |
1567 | u32 prohibited_flags) | |
1568 | { | |
1569 | int idx; | |
1570 | ||
1571 | prohibited_flags |= IEEE80211_CHAN_DISABLED; | |
1572 | ||
1573 | for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) { | |
1574 | struct ieee80211_supported_band *sband = wiphy->bands[idx]; | |
1575 | int chanidx; | |
1576 | ||
1577 | if (!sband) | |
1578 | continue; | |
1579 | ||
1580 | for (chanidx = 0; chanidx < sband->n_channels; chanidx++) { | |
1581 | struct ieee80211_channel *chan; | |
1582 | ||
1583 | chan = &sband->channels[chanidx]; | |
1584 | ||
1585 | if (chan->flags & prohibited_flags) | |
1586 | continue; | |
1587 | ||
1588 | return true; | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | return false; | |
1593 | } | |
1594 | EXPORT_SYMBOL(cfg80211_any_usable_channels); | |
7b0a0e3c JB |
1595 | |
1596 | struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev, | |
1597 | unsigned int link_id) | |
1598 | { | |
076fc877 JB |
1599 | lockdep_assert_wiphy(wdev->wiphy); |
1600 | ||
1601 | WARN_ON(wdev->valid_links && !(wdev->valid_links & BIT(link_id))); | |
1602 | WARN_ON(!wdev->valid_links && link_id > 0); | |
7b0a0e3c JB |
1603 | |
1604 | switch (wdev->iftype) { | |
1605 | case NL80211_IFTYPE_MESH_POINT: | |
1606 | return &wdev->u.mesh.chandef; | |
1607 | case NL80211_IFTYPE_ADHOC: | |
1608 | return &wdev->u.ibss.chandef; | |
1609 | case NL80211_IFTYPE_OCB: | |
1610 | return &wdev->u.ocb.chandef; | |
1611 | case NL80211_IFTYPE_AP: | |
1612 | case NL80211_IFTYPE_P2P_GO: | |
1613 | return &wdev->links[link_id].ap.chandef; | |
1614 | default: | |
1615 | return NULL; | |
1616 | } | |
1617 | } | |
1618 | EXPORT_SYMBOL(wdev_chandef); |