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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 |
b82730bf | 9 | * Copyright 2018-2024 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 | |
b82730bf JB |
30 | *chandef = (struct cfg80211_chan_def) { |
31 | .chan = chan, | |
32 | .freq1_offset = chan->freq_offset, | |
33 | }; | |
4ee3e063 | 34 | |
3d9d1d66 JB |
35 | switch (chan_type) { |
36 | case NL80211_CHAN_NO_HT: | |
37 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
38 | chandef->center_freq1 = chan->center_freq; | |
39 | break; | |
40 | case NL80211_CHAN_HT20: | |
41 | chandef->width = NL80211_CHAN_WIDTH_20; | |
42 | chandef->center_freq1 = chan->center_freq; | |
43 | break; | |
9236d838 | 44 | case NL80211_CHAN_HT40PLUS: |
3d9d1d66 JB |
45 | chandef->width = NL80211_CHAN_WIDTH_40; |
46 | chandef->center_freq1 = chan->center_freq + 10; | |
09a02fdb | 47 | break; |
9236d838 | 48 | case NL80211_CHAN_HT40MINUS: |
3d9d1d66 JB |
49 | chandef->width = NL80211_CHAN_WIDTH_40; |
50 | chandef->center_freq1 = chan->center_freq - 10; | |
09a02fdb | 51 | break; |
9236d838 | 52 | default: |
3d9d1d66 JB |
53 | WARN_ON(1); |
54 | } | |
55 | } | |
56 | EXPORT_SYMBOL(cfg80211_chandef_create); | |
57 | ||
719036ae JB |
58 | struct cfg80211_per_bw_puncturing_values { |
59 | u8 len; | |
60 | const u16 *valid_values; | |
61 | }; | |
62 | ||
63 | static const u16 puncturing_values_80mhz[] = { | |
64 | 0x8, 0x4, 0x2, 0x1 | |
65 | }; | |
66 | ||
67 | static const u16 puncturing_values_160mhz[] = { | |
68 | 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3 | |
69 | }; | |
70 | ||
71 | static const u16 puncturing_values_320mhz[] = { | |
72 | 0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00, | |
73 | 0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f, | |
74 | 0x300f, 0xc0f, 0x30f, 0xcf, 0x3f | |
75 | }; | |
76 | ||
77 | #define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \ | |
78 | { \ | |
79 | .len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \ | |
80 | .valid_values = puncturing_values_ ## _bw ## mhz \ | |
81 | } | |
82 | ||
83 | static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = { | |
84 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80), | |
85 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160), | |
86 | CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320) | |
87 | }; | |
88 | ||
b82730bf | 89 | static bool valid_puncturing_bitmap(const struct cfg80211_chan_def *chandef) |
719036ae | 90 | { |
b82730bf | 91 | u32 idx, i, start_freq, primary_center = chandef->chan->center_freq; |
719036ae JB |
92 | |
93 | switch (chandef->width) { | |
94 | case NL80211_CHAN_WIDTH_80: | |
95 | idx = 0; | |
96 | start_freq = chandef->center_freq1 - 40; | |
97 | break; | |
98 | case NL80211_CHAN_WIDTH_160: | |
99 | idx = 1; | |
100 | start_freq = chandef->center_freq1 - 80; | |
101 | break; | |
102 | case NL80211_CHAN_WIDTH_320: | |
103 | idx = 2; | |
104 | start_freq = chandef->center_freq1 - 160; | |
105 | break; | |
106 | default: | |
b82730bf | 107 | return chandef->punctured == 0; |
719036ae JB |
108 | } |
109 | ||
b82730bf | 110 | if (!chandef->punctured) |
719036ae JB |
111 | return true; |
112 | ||
113 | /* check if primary channel is punctured */ | |
b82730bf | 114 | if (chandef->punctured & (u16)BIT((primary_center - start_freq) / 20)) |
719036ae JB |
115 | return false; |
116 | ||
b82730bf JB |
117 | for (i = 0; i < per_bw_puncturing[idx].len; i++) { |
118 | if (per_bw_puncturing[idx].valid_values[i] == chandef->punctured) | |
719036ae | 119 | return true; |
b82730bf | 120 | } |
719036ae JB |
121 | |
122 | return false; | |
123 | } | |
719036ae | 124 | |
2a38075c AAL |
125 | static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) |
126 | { | |
127 | int max_contiguous = 0; | |
128 | int num_of_enabled = 0; | |
129 | int contiguous = 0; | |
130 | int i; | |
131 | ||
132 | if (!chandef->edmg.channels || !chandef->edmg.bw_config) | |
133 | return false; | |
134 | ||
135 | if (!cfg80211_valid_60g_freq(chandef->chan->center_freq)) | |
136 | return false; | |
137 | ||
138 | for (i = 0; i < 6; i++) { | |
139 | if (chandef->edmg.channels & BIT(i)) { | |
140 | contiguous++; | |
141 | num_of_enabled++; | |
142 | } else { | |
143 | contiguous = 0; | |
144 | } | |
145 | ||
146 | max_contiguous = max(contiguous, max_contiguous); | |
147 | } | |
148 | /* basic verification of edmg configuration according to | |
149 | * IEEE P802.11ay/D4.0 section 9.4.2.251 | |
150 | */ | |
151 | /* check bw_config against contiguous edmg channels */ | |
152 | switch (chandef->edmg.bw_config) { | |
153 | case IEEE80211_EDMG_BW_CONFIG_4: | |
154 | case IEEE80211_EDMG_BW_CONFIG_8: | |
155 | case IEEE80211_EDMG_BW_CONFIG_12: | |
156 | if (max_contiguous < 1) | |
157 | return false; | |
158 | break; | |
159 | case IEEE80211_EDMG_BW_CONFIG_5: | |
160 | case IEEE80211_EDMG_BW_CONFIG_9: | |
161 | case IEEE80211_EDMG_BW_CONFIG_13: | |
162 | if (max_contiguous < 2) | |
163 | return false; | |
164 | break; | |
165 | case IEEE80211_EDMG_BW_CONFIG_6: | |
166 | case IEEE80211_EDMG_BW_CONFIG_10: | |
167 | case IEEE80211_EDMG_BW_CONFIG_14: | |
168 | if (max_contiguous < 3) | |
169 | return false; | |
170 | break; | |
171 | case IEEE80211_EDMG_BW_CONFIG_7: | |
172 | case IEEE80211_EDMG_BW_CONFIG_11: | |
173 | case IEEE80211_EDMG_BW_CONFIG_15: | |
174 | if (max_contiguous < 4) | |
175 | return false; | |
176 | break; | |
177 | ||
178 | default: | |
179 | return false; | |
180 | } | |
181 | ||
182 | /* check bw_config against aggregated (non contiguous) edmg channels */ | |
183 | switch (chandef->edmg.bw_config) { | |
184 | case IEEE80211_EDMG_BW_CONFIG_4: | |
185 | case IEEE80211_EDMG_BW_CONFIG_5: | |
186 | case IEEE80211_EDMG_BW_CONFIG_6: | |
187 | case IEEE80211_EDMG_BW_CONFIG_7: | |
188 | break; | |
189 | case IEEE80211_EDMG_BW_CONFIG_8: | |
190 | case IEEE80211_EDMG_BW_CONFIG_9: | |
191 | case IEEE80211_EDMG_BW_CONFIG_10: | |
192 | case IEEE80211_EDMG_BW_CONFIG_11: | |
193 | if (num_of_enabled < 2) | |
194 | return false; | |
195 | break; | |
196 | case IEEE80211_EDMG_BW_CONFIG_12: | |
197 | case IEEE80211_EDMG_BW_CONFIG_13: | |
198 | case IEEE80211_EDMG_BW_CONFIG_14: | |
199 | case IEEE80211_EDMG_BW_CONFIG_15: | |
200 | if (num_of_enabled < 4 || max_contiguous < 2) | |
201 | return false; | |
202 | break; | |
203 | default: | |
204 | return false; | |
205 | } | |
206 | ||
207 | return true; | |
208 | } | |
209 | ||
10fa22b6 | 210 | int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width) |
11b34737 TP |
211 | { |
212 | int mhz; | |
213 | ||
214 | switch (chan_width) { | |
215 | case NL80211_CHAN_WIDTH_1: | |
216 | mhz = 1; | |
217 | break; | |
218 | case NL80211_CHAN_WIDTH_2: | |
219 | mhz = 2; | |
220 | break; | |
221 | case NL80211_CHAN_WIDTH_4: | |
222 | mhz = 4; | |
223 | break; | |
224 | case NL80211_CHAN_WIDTH_8: | |
225 | mhz = 8; | |
226 | break; | |
227 | case NL80211_CHAN_WIDTH_16: | |
228 | mhz = 16; | |
229 | break; | |
230 | case NL80211_CHAN_WIDTH_5: | |
231 | mhz = 5; | |
232 | break; | |
233 | case NL80211_CHAN_WIDTH_10: | |
234 | mhz = 10; | |
235 | break; | |
236 | case NL80211_CHAN_WIDTH_20: | |
237 | case NL80211_CHAN_WIDTH_20_NOHT: | |
238 | mhz = 20; | |
239 | break; | |
240 | case NL80211_CHAN_WIDTH_40: | |
241 | mhz = 40; | |
242 | break; | |
243 | case NL80211_CHAN_WIDTH_80P80: | |
244 | case NL80211_CHAN_WIDTH_80: | |
245 | mhz = 80; | |
246 | break; | |
247 | case NL80211_CHAN_WIDTH_160: | |
248 | mhz = 160; | |
249 | break; | |
3743bec6 JD |
250 | case NL80211_CHAN_WIDTH_320: |
251 | mhz = 320; | |
252 | break; | |
11b34737 TP |
253 | default: |
254 | WARN_ON_ONCE(1); | |
255 | return -1; | |
256 | } | |
257 | return mhz; | |
258 | } | |
10fa22b6 | 259 | EXPORT_SYMBOL(nl80211_chan_width_to_mhz); |
11b34737 TP |
260 | |
261 | static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) | |
262 | { | |
263 | return nl80211_chan_width_to_mhz(c->width); | |
264 | } | |
265 | ||
9f5e8f6e | 266 | bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) |
3d9d1d66 | 267 | { |
11b34737 TP |
268 | u32 control_freq, oper_freq; |
269 | int oper_width, control_width; | |
3d9d1d66 JB |
270 | |
271 | if (!chandef->chan) | |
272 | return false; | |
273 | ||
be689f68 JB |
274 | if (chandef->freq1_offset >= 1000) |
275 | return false; | |
276 | ||
3d9d1d66 JB |
277 | control_freq = chandef->chan->center_freq; |
278 | ||
279 | switch (chandef->width) { | |
2f301ab2 SW |
280 | case NL80211_CHAN_WIDTH_5: |
281 | case NL80211_CHAN_WIDTH_10: | |
3d9d1d66 JB |
282 | case NL80211_CHAN_WIDTH_20: |
283 | case NL80211_CHAN_WIDTH_20_NOHT: | |
934f4c7d TP |
284 | if (ieee80211_chandef_to_khz(chandef) != |
285 | ieee80211_channel_to_khz(chandef->chan)) | |
3d9d1d66 JB |
286 | return false; |
287 | if (chandef->center_freq2) | |
288 | return false; | |
289 | break; | |
c1cd35c6 | 290 | case NL80211_CHAN_WIDTH_1: |
11b34737 TP |
291 | case NL80211_CHAN_WIDTH_2: |
292 | case NL80211_CHAN_WIDTH_4: | |
293 | case NL80211_CHAN_WIDTH_8: | |
294 | case NL80211_CHAN_WIDTH_16: | |
c1cd35c6 TP |
295 | if (chandef->chan->band != NL80211_BAND_S1GHZ) |
296 | return false; | |
297 | ||
11b34737 TP |
298 | control_freq = ieee80211_channel_to_khz(chandef->chan); |
299 | oper_freq = ieee80211_chandef_to_khz(chandef); | |
300 | control_width = nl80211_chan_width_to_mhz( | |
301 | ieee80211_s1g_channel_width( | |
302 | chandef->chan)); | |
303 | oper_width = cfg80211_chandef_get_width(chandef); | |
304 | ||
305 | if (oper_width < 0 || control_width < 0) | |
306 | return false; | |
307 | if (chandef->center_freq2) | |
308 | return false; | |
309 | ||
310 | if (control_freq + MHZ_TO_KHZ(control_width) / 2 > | |
311 | oper_freq + MHZ_TO_KHZ(oper_width) / 2) | |
312 | return false; | |
313 | ||
314 | if (control_freq - MHZ_TO_KHZ(control_width) / 2 < | |
315 | oper_freq - MHZ_TO_KHZ(oper_width) / 2) | |
316 | return false; | |
317 | break; | |
3d9d1d66 | 318 | case NL80211_CHAN_WIDTH_80P80: |
3d9d1d66 JB |
319 | if (!chandef->center_freq2) |
320 | return false; | |
9cab3151 JB |
321 | /* adjacent is not allowed -- that's a 160 MHz channel */ |
322 | if (chandef->center_freq1 - chandef->center_freq2 == 80 || | |
323 | chandef->center_freq2 - chandef->center_freq1 == 80) | |
324 | return false; | |
3d9d1d66 | 325 | break; |
3bb1ccc4 | 326 | default: |
3d9d1d66 JB |
327 | if (chandef->center_freq2) |
328 | return false; | |
329 | break; | |
3bb1ccc4 JB |
330 | } |
331 | ||
332 | switch (chandef->width) { | |
333 | case NL80211_CHAN_WIDTH_5: | |
334 | case NL80211_CHAN_WIDTH_10: | |
335 | case NL80211_CHAN_WIDTH_20: | |
336 | case NL80211_CHAN_WIDTH_20_NOHT: | |
337 | case NL80211_CHAN_WIDTH_1: | |
338 | case NL80211_CHAN_WIDTH_2: | |
339 | case NL80211_CHAN_WIDTH_4: | |
340 | case NL80211_CHAN_WIDTH_8: | |
341 | case NL80211_CHAN_WIDTH_16: | |
342 | /* all checked above */ | |
3d9d1d66 | 343 | break; |
3743bec6 JD |
344 | case NL80211_CHAN_WIDTH_320: |
345 | if (chandef->center_freq1 == control_freq + 150 || | |
346 | chandef->center_freq1 == control_freq + 130 || | |
347 | chandef->center_freq1 == control_freq + 110 || | |
348 | chandef->center_freq1 == control_freq + 90 || | |
349 | chandef->center_freq1 == control_freq - 90 || | |
350 | chandef->center_freq1 == control_freq - 110 || | |
351 | chandef->center_freq1 == control_freq - 130 || | |
352 | chandef->center_freq1 == control_freq - 150) | |
353 | break; | |
354 | fallthrough; | |
3bb1ccc4 JB |
355 | case NL80211_CHAN_WIDTH_160: |
356 | if (chandef->center_freq1 == control_freq + 70 || | |
357 | chandef->center_freq1 == control_freq + 50 || | |
358 | chandef->center_freq1 == control_freq - 50 || | |
359 | chandef->center_freq1 == control_freq - 70) | |
360 | break; | |
361 | fallthrough; | |
362 | case NL80211_CHAN_WIDTH_80P80: | |
363 | case NL80211_CHAN_WIDTH_80: | |
364 | if (chandef->center_freq1 == control_freq + 30 || | |
365 | chandef->center_freq1 == control_freq - 30) | |
366 | break; | |
367 | fallthrough; | |
368 | case NL80211_CHAN_WIDTH_40: | |
369 | if (chandef->center_freq1 == control_freq + 10 || | |
370 | chandef->center_freq1 == control_freq - 10) | |
371 | break; | |
372 | fallthrough; | |
3d9d1d66 JB |
373 | default: |
374 | return false; | |
375 | } | |
376 | ||
ec649fed MH |
377 | /* channel 14 is only for IEEE 802.11b */ |
378 | if (chandef->center_freq1 == 2484 && | |
379 | chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
380 | return false; | |
381 | ||
2a38075c AAL |
382 | if (cfg80211_chandef_is_edmg(chandef) && |
383 | !cfg80211_edmg_chandef_valid(chandef)) | |
384 | return false; | |
385 | ||
b82730bf | 386 | return valid_puncturing_bitmap(chandef); |
3d9d1d66 | 387 | } |
9f5e8f6e | 388 | EXPORT_SYMBOL(cfg80211_chandef_valid); |
3d9d1d66 | 389 | |
b82730bf JB |
390 | int cfg80211_chandef_primary(const struct cfg80211_chan_def *c, |
391 | enum nl80211_chan_width primary_chan_width, | |
392 | u16 *punctured) | |
3d9d1d66 | 393 | { |
8f251a0a JB |
394 | int pri_width = nl80211_chan_width_to_mhz(primary_chan_width); |
395 | int width = cfg80211_chandef_get_width(c); | |
396 | u32 control = c->chan->center_freq; | |
397 | u32 center = c->center_freq1; | |
b82730bf | 398 | u16 _punct = 0; |
3d9d1d66 | 399 | |
8f251a0a JB |
400 | if (WARN_ON_ONCE(pri_width < 0 || width < 0)) |
401 | return -1; | |
402 | ||
403 | /* not intended to be called this way, can't determine */ | |
404 | if (WARN_ON_ONCE(pri_width > width)) | |
405 | return -1; | |
406 | ||
b82730bf JB |
407 | if (!punctured) |
408 | punctured = &_punct; | |
409 | ||
410 | *punctured = c->punctured; | |
411 | ||
8f251a0a | 412 | while (width > pri_width) { |
b82730bf JB |
413 | unsigned int bits_to_drop = width / 20 / 2; |
414 | ||
415 | if (control > center) { | |
8f251a0a | 416 | center += width / 4; |
b82730bf JB |
417 | *punctured >>= bits_to_drop; |
418 | } else { | |
8f251a0a | 419 | center -= width / 4; |
b82730bf JB |
420 | *punctured &= (1 << bits_to_drop) - 1; |
421 | } | |
8f251a0a | 422 | width /= 2; |
3d9d1d66 | 423 | } |
8f251a0a JB |
424 | |
425 | return center; | |
3d9d1d66 | 426 | } |
b82730bf | 427 | EXPORT_SYMBOL(cfg80211_chandef_primary); |
3d9d1d66 | 428 | |
8f251a0a JB |
429 | static const struct cfg80211_chan_def * |
430 | check_chandef_primary_compat(const struct cfg80211_chan_def *c1, | |
431 | const struct cfg80211_chan_def *c2, | |
432 | enum nl80211_chan_width primary_chan_width) | |
3d9d1d66 | 433 | { |
b82730bf JB |
434 | u16 punct_c1 = 0, punct_c2 = 0; |
435 | ||
8f251a0a | 436 | /* check primary is compatible -> error if not */ |
b82730bf JB |
437 | if (cfg80211_chandef_primary(c1, primary_chan_width, &punct_c1) != |
438 | cfg80211_chandef_primary(c2, primary_chan_width, &punct_c2)) | |
439 | return ERR_PTR(-EINVAL); | |
440 | ||
441 | if (punct_c1 != punct_c2) | |
8f251a0a JB |
442 | return ERR_PTR(-EINVAL); |
443 | ||
444 | /* assumes c1 is smaller width, if that was just checked -> done */ | |
445 | if (c1->width == primary_chan_width) | |
446 | return c2; | |
447 | ||
448 | /* otherwise continue checking the next width */ | |
449 | return NULL; | |
450 | } | |
451 | ||
452 | static const struct cfg80211_chan_def * | |
453 | _cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
454 | const struct cfg80211_chan_def *c2) | |
455 | { | |
456 | const struct cfg80211_chan_def *ret; | |
3d9d1d66 JB |
457 | |
458 | /* If they are identical, return */ | |
459 | if (cfg80211_chandef_identical(c1, c2)) | |
8f251a0a | 460 | return c2; |
3d9d1d66 JB |
461 | |
462 | /* otherwise, must have same control channel */ | |
463 | if (c1->chan != c2->chan) | |
464 | return NULL; | |
465 | ||
466 | /* | |
467 | * If they have the same width, but aren't identical, | |
468 | * then they can't be compatible. | |
469 | */ | |
470 | if (c1->width == c2->width) | |
471 | return NULL; | |
472 | ||
2f301ab2 | 473 | /* |
b9d908dc | 474 | * can't be compatible if one of them is 5/10 MHz or S1G |
2f301ab2 SW |
475 | * but they don't have the same width. |
476 | */ | |
b9d908dc JB |
477 | #define NARROW_OR_S1G(width) ((width) == NL80211_CHAN_WIDTH_5 || \ |
478 | (width) == NL80211_CHAN_WIDTH_10 || \ | |
479 | (width) == NL80211_CHAN_WIDTH_1 || \ | |
480 | (width) == NL80211_CHAN_WIDTH_2 || \ | |
481 | (width) == NL80211_CHAN_WIDTH_4 || \ | |
482 | (width) == NL80211_CHAN_WIDTH_8 || \ | |
483 | (width) == NL80211_CHAN_WIDTH_16) | |
484 | ||
485 | if (NARROW_OR_S1G(c1->width) || NARROW_OR_S1G(c2->width)) | |
2f301ab2 SW |
486 | return NULL; |
487 | ||
8f251a0a JB |
488 | /* |
489 | * Make sure that c1 is always the narrower one, so that later | |
490 | * we either return NULL or c2 and don't have to check both | |
491 | * directions. | |
492 | */ | |
493 | if (c1->width > c2->width) | |
494 | swap(c1, c2); | |
495 | ||
496 | /* | |
497 | * No further checks needed if the "narrower" one is only 20 MHz. | |
498 | * Here "narrower" includes being a 20 MHz non-HT channel vs. a | |
499 | * 20 MHz HT (or later) one. | |
500 | */ | |
501 | if (c1->width <= NL80211_CHAN_WIDTH_20) | |
3d9d1d66 JB |
502 | return c2; |
503 | ||
8f251a0a JB |
504 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_40); |
505 | if (ret) | |
506 | return ret; | |
3d9d1d66 | 507 | |
8f251a0a JB |
508 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_80); |
509 | if (ret) | |
510 | return ret; | |
3d9d1d66 | 511 | |
8f251a0a JB |
512 | /* |
513 | * If c1 is 80+80, then c2 is 160 or higher, but that cannot | |
514 | * match. If c2 was also 80+80 it was already either accepted | |
515 | * or rejected above (identical or not, respectively.) | |
516 | */ | |
517 | if (c1->width == NL80211_CHAN_WIDTH_80P80) | |
3d9d1d66 JB |
518 | return NULL; |
519 | ||
8f251a0a JB |
520 | ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_160); |
521 | if (ret) | |
522 | return ret; | |
3743bec6 | 523 | |
8f251a0a JB |
524 | /* |
525 | * Getting here would mean they're both wider than 160, have the | |
526 | * same primary 160, but are not identical - this cannot happen | |
527 | * since they must be 320 (no wider chandefs exist, at least yet.) | |
528 | */ | |
529 | WARN_ON_ONCE(1); | |
3743bec6 | 530 | |
8f251a0a JB |
531 | return NULL; |
532 | } | |
3743bec6 | 533 | |
8f251a0a JB |
534 | const struct cfg80211_chan_def * |
535 | cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, | |
536 | const struct cfg80211_chan_def *c2) | |
537 | { | |
538 | const struct cfg80211_chan_def *ret; | |
3743bec6 | 539 | |
8f251a0a JB |
540 | ret = _cfg80211_chandef_compatible(c1, c2); |
541 | if (IS_ERR(ret)) | |
3d9d1d66 | 542 | return NULL; |
8f251a0a | 543 | return ret; |
3d9d1d66 JB |
544 | } |
545 | EXPORT_SYMBOL(cfg80211_chandef_compatible); | |
546 | ||
04f39047 SW |
547 | static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, |
548 | u32 bandwidth, | |
549 | enum nl80211_dfs_state dfs_state) | |
550 | { | |
551 | struct ieee80211_channel *c; | |
552 | u32 freq; | |
553 | ||
554 | for (freq = center_freq - bandwidth/2 + 10; | |
555 | freq <= center_freq + bandwidth/2 - 10; | |
556 | freq += 20) { | |
557 | c = ieee80211_get_channel(wiphy, freq); | |
558 | if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) | |
559 | continue; | |
560 | ||
561 | c->dfs_state = dfs_state; | |
562 | c->dfs_state_entered = jiffies; | |
563 | } | |
564 | } | |
565 | ||
566 | void cfg80211_set_dfs_state(struct wiphy *wiphy, | |
567 | const struct cfg80211_chan_def *chandef, | |
568 | enum nl80211_dfs_state dfs_state) | |
569 | { | |
570 | int width; | |
571 | ||
572 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
573 | return; | |
574 | ||
575 | width = cfg80211_chandef_get_width(chandef); | |
576 | if (width < 0) | |
577 | return; | |
578 | ||
579 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, | |
580 | width, dfs_state); | |
581 | ||
582 | if (!chandef->center_freq2) | |
583 | return; | |
584 | cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, | |
585 | width, dfs_state); | |
586 | } | |
587 | ||
40d1ba63 JD |
588 | static u32 cfg80211_get_start_freq(u32 center_freq, |
589 | u32 bandwidth) | |
590 | { | |
591 | u32 start_freq; | |
592 | ||
934f4c7d TP |
593 | bandwidth = MHZ_TO_KHZ(bandwidth); |
594 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
595 | start_freq = center_freq; |
596 | else | |
934f4c7d | 597 | start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); |
40d1ba63 JD |
598 | |
599 | return start_freq; | |
600 | } | |
601 | ||
602 | static u32 cfg80211_get_end_freq(u32 center_freq, | |
603 | u32 bandwidth) | |
604 | { | |
605 | u32 end_freq; | |
606 | ||
934f4c7d TP |
607 | bandwidth = MHZ_TO_KHZ(bandwidth); |
608 | if (bandwidth <= MHZ_TO_KHZ(20)) | |
40d1ba63 JD |
609 | end_freq = center_freq; |
610 | else | |
934f4c7d | 611 | end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); |
40d1ba63 JD |
612 | |
613 | return end_freq; | |
614 | } | |
615 | ||
41a313d8 AO |
616 | static bool |
617 | cfg80211_dfs_permissive_check_wdev(struct cfg80211_registered_device *rdev, | |
618 | enum nl80211_iftype iftype, | |
619 | struct wireless_dev *wdev, | |
620 | struct ieee80211_channel *chan) | |
621 | { | |
622 | unsigned int link_id; | |
623 | ||
624 | for_each_valid_link(wdev, link_id) { | |
625 | struct ieee80211_channel *other_chan = NULL; | |
626 | struct cfg80211_chan_def chandef = {}; | |
627 | int ret; | |
628 | ||
629 | /* In order to avoid daisy chaining only allow BSS STA */ | |
630 | if (wdev->iftype != NL80211_IFTYPE_STATION || | |
631 | !wdev->links[link_id].client.current_bss) | |
632 | continue; | |
633 | ||
634 | other_chan = | |
635 | wdev->links[link_id].client.current_bss->pub.channel; | |
636 | ||
637 | if (!other_chan) | |
638 | continue; | |
639 | ||
640 | if (chan == other_chan) | |
641 | return true; | |
642 | ||
643 | /* continue if we can't get the channel */ | |
644 | ret = rdev_get_channel(rdev, wdev, link_id, &chandef); | |
645 | if (ret) | |
646 | continue; | |
647 | ||
648 | if (cfg80211_is_sub_chan(&chandef, chan, false)) | |
649 | return true; | |
650 | } | |
651 | ||
652 | return false; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Check if P2P GO is allowed to operate on a DFS channel | |
657 | */ | |
658 | static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy, | |
659 | enum nl80211_iftype iftype, | |
660 | struct ieee80211_channel *chan) | |
661 | { | |
662 | struct wireless_dev *wdev; | |
663 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
664 | ||
665 | lockdep_assert_held(&rdev->wiphy.mtx); | |
666 | ||
667 | if (!wiphy_ext_feature_isset(&rdev->wiphy, | |
668 | NL80211_EXT_FEATURE_DFS_CONCURRENT) || | |
669 | !(chan->flags & IEEE80211_CHAN_DFS_CONCURRENT)) | |
670 | return false; | |
671 | ||
672 | /* only valid for P2P GO */ | |
673 | if (iftype != NL80211_IFTYPE_P2P_GO) | |
674 | return false; | |
675 | ||
676 | /* | |
677 | * Allow only if there's a concurrent BSS | |
678 | */ | |
679 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
680 | bool ret = cfg80211_dfs_permissive_check_wdev(rdev, iftype, | |
681 | wdev, chan); | |
682 | if (ret) | |
683 | return ret; | |
684 | } | |
685 | ||
686 | return false; | |
687 | } | |
688 | ||
04f39047 SW |
689 | static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, |
690 | u32 center_freq, | |
41a313d8 AO |
691 | u32 bandwidth, |
692 | enum nl80211_iftype iftype) | |
04f39047 SW |
693 | { |
694 | struct ieee80211_channel *c; | |
2f301ab2 SW |
695 | u32 freq, start_freq, end_freq; |
696 | ||
40d1ba63 JD |
697 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
698 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
04f39047 | 699 | |
934f4c7d TP |
700 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
701 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
702 | if (!c) |
703 | return -EINVAL; | |
704 | ||
41a313d8 AO |
705 | if (c->flags & IEEE80211_CHAN_RADAR && |
706 | !cfg80211_dfs_permissive_chan(wiphy, iftype, c)) | |
04f39047 SW |
707 | return 1; |
708 | } | |
41a313d8 | 709 | |
04f39047 SW |
710 | return 0; |
711 | } | |
712 | ||
713 | ||
714 | int cfg80211_chandef_dfs_required(struct wiphy *wiphy, | |
2beb6dab LC |
715 | const struct cfg80211_chan_def *chandef, |
716 | enum nl80211_iftype iftype) | |
04f39047 SW |
717 | { |
718 | int width; | |
2beb6dab | 719 | int ret; |
04f39047 SW |
720 | |
721 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
722 | return -EINVAL; | |
723 | ||
2beb6dab LC |
724 | switch (iftype) { |
725 | case NL80211_IFTYPE_ADHOC: | |
726 | case NL80211_IFTYPE_AP: | |
727 | case NL80211_IFTYPE_P2P_GO: | |
728 | case NL80211_IFTYPE_MESH_POINT: | |
729 | width = cfg80211_chandef_get_width(chandef); | |
730 | if (width < 0) | |
731 | return -EINVAL; | |
04f39047 | 732 | |
2beb6dab | 733 | ret = cfg80211_get_chans_dfs_required(wiphy, |
934f4c7d | 734 | ieee80211_chandef_to_khz(chandef), |
41a313d8 | 735 | width, iftype); |
2beb6dab LC |
736 | if (ret < 0) |
737 | return ret; | |
738 | else if (ret > 0) | |
739 | return BIT(chandef->width); | |
04f39047 | 740 | |
2beb6dab LC |
741 | if (!chandef->center_freq2) |
742 | return 0; | |
743 | ||
744 | ret = cfg80211_get_chans_dfs_required(wiphy, | |
934f4c7d | 745 | MHZ_TO_KHZ(chandef->center_freq2), |
41a313d8 | 746 | width, iftype); |
2beb6dab LC |
747 | if (ret < 0) |
748 | return ret; | |
749 | else if (ret > 0) | |
750 | return BIT(chandef->width); | |
04f39047 | 751 | |
2beb6dab LC |
752 | break; |
753 | case NL80211_IFTYPE_STATION: | |
6e0bd6c3 | 754 | case NL80211_IFTYPE_OCB: |
2beb6dab LC |
755 | case NL80211_IFTYPE_P2P_CLIENT: |
756 | case NL80211_IFTYPE_MONITOR: | |
757 | case NL80211_IFTYPE_AP_VLAN: | |
2beb6dab | 758 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 759 | case NL80211_IFTYPE_NAN: |
2beb6dab | 760 | break; |
e7e0517c | 761 | case NL80211_IFTYPE_WDS: |
00ec75fc | 762 | case NL80211_IFTYPE_UNSPECIFIED: |
2beb6dab LC |
763 | case NUM_NL80211_IFTYPES: |
764 | WARN_ON(1); | |
765 | } | |
766 | ||
767 | return 0; | |
04f39047 | 768 | } |
774f0734 | 769 | EXPORT_SYMBOL(cfg80211_chandef_dfs_required); |
04f39047 | 770 | |
fe7c3a1f JD |
771 | static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, |
772 | u32 center_freq, | |
773 | u32 bandwidth) | |
774 | { | |
775 | struct ieee80211_channel *c; | |
776 | u32 freq, start_freq, end_freq; | |
777 | int count = 0; | |
778 | ||
779 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
780 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
781 | ||
782 | /* | |
783 | * Check entire range of channels for the bandwidth. | |
784 | * Check all channels are DFS channels (DFS_USABLE or | |
785 | * DFS_AVAILABLE). Return number of usable channels | |
786 | * (require CAC). Allow DFS and non-DFS channel mix. | |
787 | */ | |
934f4c7d TP |
788 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
789 | c = ieee80211_get_channel_khz(wiphy, freq); | |
fe7c3a1f JD |
790 | if (!c) |
791 | return -EINVAL; | |
792 | ||
793 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
794 | return -EINVAL; | |
795 | ||
796 | if (c->flags & IEEE80211_CHAN_RADAR) { | |
797 | if (c->dfs_state == NL80211_DFS_UNAVAILABLE) | |
798 | return -EINVAL; | |
799 | ||
800 | if (c->dfs_state == NL80211_DFS_USABLE) | |
801 | count++; | |
802 | } | |
803 | } | |
804 | ||
805 | return count; | |
806 | } | |
807 | ||
808 | bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, | |
809 | const struct cfg80211_chan_def *chandef) | |
810 | { | |
811 | int width; | |
812 | int r1, r2 = 0; | |
813 | ||
814 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
815 | return false; | |
816 | ||
817 | width = cfg80211_chandef_get_width(chandef); | |
818 | if (width < 0) | |
819 | return false; | |
820 | ||
934f4c7d TP |
821 | r1 = cfg80211_get_chans_dfs_usable(wiphy, |
822 | MHZ_TO_KHZ(chandef->center_freq1), | |
823 | width); | |
fe7c3a1f JD |
824 | |
825 | if (r1 < 0) | |
826 | return false; | |
827 | ||
828 | switch (chandef->width) { | |
829 | case NL80211_CHAN_WIDTH_80P80: | |
830 | WARN_ON(!chandef->center_freq2); | |
831 | r2 = cfg80211_get_chans_dfs_usable(wiphy, | |
934f4c7d TP |
832 | MHZ_TO_KHZ(chandef->center_freq2), |
833 | width); | |
fe7c3a1f JD |
834 | if (r2 < 0) |
835 | return false; | |
836 | break; | |
837 | default: | |
838 | WARN_ON(chandef->center_freq2); | |
839 | break; | |
840 | } | |
841 | ||
842 | return (r1 + r2 > 0); | |
843 | } | |
30ca8b0c | 844 | EXPORT_SYMBOL(cfg80211_chandef_dfs_usable); |
fe7c3a1f | 845 | |
b35a51c7 VT |
846 | /* |
847 | * Checks if center frequency of chan falls with in the bandwidth | |
848 | * range of chandef. | |
849 | */ | |
850 | bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, | |
7b0a0e3c JB |
851 | struct ieee80211_channel *chan, |
852 | bool primary_only) | |
b35a51c7 VT |
853 | { |
854 | int width; | |
a67a4893 | 855 | u32 freq; |
b35a51c7 | 856 | |
7b0a0e3c JB |
857 | if (!chandef->chan) |
858 | return false; | |
859 | ||
b35a51c7 VT |
860 | if (chandef->chan->center_freq == chan->center_freq) |
861 | return true; | |
862 | ||
7b0a0e3c JB |
863 | if (primary_only) |
864 | return false; | |
865 | ||
b35a51c7 VT |
866 | width = cfg80211_chandef_get_width(chandef); |
867 | if (width <= 20) | |
868 | return false; | |
869 | ||
b35a51c7 VT |
870 | for (freq = chandef->center_freq1 - width / 2 + 10; |
871 | freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { | |
872 | if (chan->center_freq == freq) | |
873 | return true; | |
874 | } | |
875 | ||
876 | if (!chandef->center_freq2) | |
877 | return false; | |
878 | ||
879 | for (freq = chandef->center_freq2 - width / 2 + 10; | |
880 | freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { | |
881 | if (chan->center_freq == freq) | |
882 | return true; | |
883 | } | |
884 | ||
885 | return false; | |
886 | } | |
887 | ||
888 | bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) | |
889 | { | |
7b0a0e3c | 890 | unsigned int link; |
b35a51c7 | 891 | |
076fc877 | 892 | lockdep_assert_wiphy(wdev->wiphy); |
b35a51c7 | 893 | |
b35a51c7 VT |
894 | switch (wdev->iftype) { |
895 | case NL80211_IFTYPE_AP: | |
896 | case NL80211_IFTYPE_P2P_GO: | |
7b0a0e3c JB |
897 | for_each_valid_link(wdev, link) { |
898 | if (wdev->links[link].ap.beacon_interval) | |
899 | return true; | |
900 | } | |
b35a51c7 VT |
901 | break; |
902 | case NL80211_IFTYPE_ADHOC: | |
7b0a0e3c JB |
903 | if (wdev->u.ibss.ssid_len) |
904 | return true; | |
b35a51c7 VT |
905 | break; |
906 | case NL80211_IFTYPE_MESH_POINT: | |
7b0a0e3c JB |
907 | if (wdev->u.mesh.id_len) |
908 | return true; | |
b35a51c7 VT |
909 | break; |
910 | case NL80211_IFTYPE_STATION: | |
911 | case NL80211_IFTYPE_OCB: | |
912 | case NL80211_IFTYPE_P2P_CLIENT: | |
913 | case NL80211_IFTYPE_MONITOR: | |
914 | case NL80211_IFTYPE_AP_VLAN: | |
b35a51c7 VT |
915 | case NL80211_IFTYPE_P2P_DEVICE: |
916 | /* Can NAN type be considered as beaconing interface? */ | |
917 | case NL80211_IFTYPE_NAN: | |
918 | break; | |
919 | case NL80211_IFTYPE_UNSPECIFIED: | |
e7e0517c | 920 | case NL80211_IFTYPE_WDS: |
b35a51c7 VT |
921 | case NUM_NL80211_IFTYPES: |
922 | WARN_ON(1); | |
923 | } | |
924 | ||
7b0a0e3c JB |
925 | return false; |
926 | } | |
927 | ||
928 | bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev, | |
929 | struct ieee80211_channel *chan, | |
930 | bool primary_only) | |
931 | { | |
932 | unsigned int link; | |
933 | ||
934 | switch (wdev->iftype) { | |
935 | case NL80211_IFTYPE_AP: | |
936 | case NL80211_IFTYPE_P2P_GO: | |
937 | for_each_valid_link(wdev, link) { | |
938 | if (cfg80211_is_sub_chan(&wdev->links[link].ap.chandef, | |
939 | chan, primary_only)) | |
940 | return true; | |
941 | } | |
942 | break; | |
943 | case NL80211_IFTYPE_ADHOC: | |
944 | return cfg80211_is_sub_chan(&wdev->u.ibss.chandef, chan, | |
945 | primary_only); | |
946 | case NL80211_IFTYPE_MESH_POINT: | |
947 | return cfg80211_is_sub_chan(&wdev->u.mesh.chandef, chan, | |
948 | primary_only); | |
949 | default: | |
950 | break; | |
951 | } | |
952 | ||
953 | return false; | |
b35a51c7 VT |
954 | } |
955 | ||
89766727 VT |
956 | static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy, |
957 | struct ieee80211_channel *chan) | |
b35a51c7 VT |
958 | { |
959 | struct wireless_dev *wdev; | |
960 | ||
076fc877 JB |
961 | lockdep_assert_wiphy(wiphy); |
962 | ||
b35a51c7 | 963 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
076fc877 | 964 | if (!cfg80211_beaconing_iface_active(wdev)) |
b35a51c7 | 965 | continue; |
b35a51c7 | 966 | |
076fc877 | 967 | if (cfg80211_wdev_on_sub_chan(wdev, chan, false)) |
b35a51c7 | 968 | return true; |
b35a51c7 VT |
969 | } |
970 | ||
971 | return false; | |
972 | } | |
fe7c3a1f | 973 | |
84158164 LB |
974 | static bool |
975 | cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev, | |
976 | struct ieee80211_channel *channel) | |
977 | { | |
a95bfb87 | 978 | if (!rdev->background_radar_wdev) |
84158164 LB |
979 | return false; |
980 | ||
a95bfb87 | 981 | if (!cfg80211_chandef_valid(&rdev->background_radar_chandef)) |
84158164 LB |
982 | return false; |
983 | ||
7b0a0e3c JB |
984 | return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel, |
985 | false); | |
84158164 LB |
986 | } |
987 | ||
89766727 VT |
988 | bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, |
989 | struct ieee80211_channel *chan) | |
990 | { | |
991 | struct cfg80211_registered_device *rdev; | |
992 | ||
993 | ASSERT_RTNL(); | |
994 | ||
995 | if (!(chan->flags & IEEE80211_CHAN_RADAR)) | |
996 | return false; | |
997 | ||
7483a214 | 998 | for_each_rdev(rdev) { |
fa8809a5 JB |
999 | bool found; |
1000 | ||
89766727 VT |
1001 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) |
1002 | continue; | |
1003 | ||
fa8809a5 JB |
1004 | wiphy_lock(&rdev->wiphy); |
1005 | found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) || | |
1006 | cfg80211_offchan_chain_is_active(rdev, chan); | |
1007 | wiphy_unlock(&rdev->wiphy); | |
84158164 | 1008 | |
fa8809a5 | 1009 | if (found) |
84158164 | 1010 | return true; |
89766727 VT |
1011 | } |
1012 | ||
1013 | return false; | |
1014 | } | |
1015 | ||
6bc54fbc JD |
1016 | static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, |
1017 | u32 center_freq, | |
1018 | u32 bandwidth) | |
3d9d1d66 JB |
1019 | { |
1020 | struct ieee80211_channel *c; | |
2f301ab2 | 1021 | u32 freq, start_freq, end_freq; |
2c390e44 DL |
1022 | bool dfs_offload; |
1023 | ||
1024 | dfs_offload = wiphy_ext_feature_isset(wiphy, | |
1025 | NL80211_EXT_FEATURE_DFS_OFFLOAD); | |
2f301ab2 | 1026 | |
40d1ba63 JD |
1027 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
1028 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
3d9d1d66 | 1029 | |
6bc54fbc JD |
1030 | /* |
1031 | * Check entire range of channels for the bandwidth. | |
1032 | * If any channel in between is disabled or has not | |
1033 | * had gone through CAC return false | |
1034 | */ | |
934f4c7d TP |
1035 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1036 | c = ieee80211_get_channel_khz(wiphy, freq); | |
04f39047 SW |
1037 | if (!c) |
1038 | return false; | |
1039 | ||
6bc54fbc JD |
1040 | if (c->flags & IEEE80211_CHAN_DISABLED) |
1041 | return false; | |
1042 | ||
2c390e44 DL |
1043 | if ((c->flags & IEEE80211_CHAN_RADAR) && |
1044 | (c->dfs_state != NL80211_DFS_AVAILABLE) && | |
1045 | !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload)) | |
04f39047 | 1046 | return false; |
6bc54fbc JD |
1047 | } |
1048 | ||
1049 | return true; | |
1050 | } | |
1051 | ||
1052 | static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, | |
1053 | const struct cfg80211_chan_def *chandef) | |
1054 | { | |
1055 | int width; | |
1056 | int r; | |
1057 | ||
1058 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
1059 | return false; | |
1060 | ||
1061 | width = cfg80211_chandef_get_width(chandef); | |
1062 | if (width < 0) | |
1063 | return false; | |
1064 | ||
934f4c7d TP |
1065 | r = cfg80211_get_chans_dfs_available(wiphy, |
1066 | MHZ_TO_KHZ(chandef->center_freq1), | |
6bc54fbc JD |
1067 | width); |
1068 | ||
1069 | /* If any of channels unavailable for cf1 just return */ | |
1070 | if (!r) | |
1071 | return r; | |
1072 | ||
1073 | switch (chandef->width) { | |
1074 | case NL80211_CHAN_WIDTH_80P80: | |
1075 | WARN_ON(!chandef->center_freq2); | |
1076 | r = cfg80211_get_chans_dfs_available(wiphy, | |
934f4c7d TP |
1077 | MHZ_TO_KHZ(chandef->center_freq2), |
1078 | width); | |
680682d4 | 1079 | break; |
6bc54fbc JD |
1080 | default: |
1081 | WARN_ON(chandef->center_freq2); | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | return r; | |
1086 | } | |
1087 | ||
31559f35 JD |
1088 | static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, |
1089 | u32 center_freq, | |
1090 | u32 bandwidth) | |
1091 | { | |
1092 | struct ieee80211_channel *c; | |
1093 | u32 start_freq, end_freq, freq; | |
1094 | unsigned int dfs_cac_ms = 0; | |
1095 | ||
1096 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); | |
1097 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1098 | ||
934f4c7d TP |
1099 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1100 | c = ieee80211_get_channel_khz(wiphy, freq); | |
31559f35 JD |
1101 | if (!c) |
1102 | return 0; | |
1103 | ||
1104 | if (c->flags & IEEE80211_CHAN_DISABLED) | |
1105 | return 0; | |
1106 | ||
1107 | if (!(c->flags & IEEE80211_CHAN_RADAR)) | |
1108 | continue; | |
1109 | ||
1110 | if (c->dfs_cac_ms > dfs_cac_ms) | |
1111 | dfs_cac_ms = c->dfs_cac_ms; | |
1112 | } | |
1113 | ||
1114 | return dfs_cac_ms; | |
1115 | } | |
1116 | ||
1117 | unsigned int | |
1118 | cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, | |
1119 | const struct cfg80211_chan_def *chandef) | |
1120 | { | |
1121 | int width; | |
1122 | unsigned int t1 = 0, t2 = 0; | |
1123 | ||
1124 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
1125 | return 0; | |
1126 | ||
1127 | width = cfg80211_chandef_get_width(chandef); | |
1128 | if (width < 0) | |
1129 | return 0; | |
1130 | ||
1131 | t1 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1132 | MHZ_TO_KHZ(chandef->center_freq1), |
31559f35 JD |
1133 | width); |
1134 | ||
1135 | if (!chandef->center_freq2) | |
1136 | return t1; | |
1137 | ||
1138 | t2 = cfg80211_get_chans_dfs_cac_time(wiphy, | |
934f4c7d | 1139 | MHZ_TO_KHZ(chandef->center_freq2), |
31559f35 JD |
1140 | width); |
1141 | ||
1142 | return max(t1, t2); | |
1143 | } | |
30ca8b0c | 1144 | EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time); |
6bc54fbc JD |
1145 | |
1146 | static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, | |
1147 | u32 center_freq, u32 bandwidth, | |
a110a3b7 | 1148 | u32 prohibited_flags, bool monitor) |
6bc54fbc JD |
1149 | { |
1150 | struct ieee80211_channel *c; | |
1151 | u32 freq, start_freq, end_freq; | |
04f39047 | 1152 | |
6bc54fbc JD |
1153 | start_freq = cfg80211_get_start_freq(center_freq, bandwidth); |
1154 | end_freq = cfg80211_get_end_freq(center_freq, bandwidth); | |
1155 | ||
934f4c7d TP |
1156 | for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { |
1157 | c = ieee80211_get_channel_khz(wiphy, freq); | |
a110a3b7 JB |
1158 | if (!c) |
1159 | return false; | |
1160 | if (monitor && c->flags & IEEE80211_CHAN_CAN_MONITOR) | |
1161 | continue; | |
1162 | if (c->flags & prohibited_flags) | |
3d9d1d66 | 1163 | return false; |
9236d838 LR |
1164 | } |
1165 | ||
3d9d1d66 JB |
1166 | return true; |
1167 | } | |
1168 | ||
2a38075c AAL |
1169 | /* check if the operating channels are valid and supported */ |
1170 | static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, | |
1171 | enum ieee80211_edmg_bw_config edmg_bw_config, | |
1172 | int primary_channel, | |
1173 | struct ieee80211_edmg *edmg_cap) | |
1174 | { | |
1175 | struct ieee80211_channel *chan; | |
1176 | int i, freq; | |
1177 | int channels_counter = 0; | |
1178 | ||
1179 | if (!edmg_channels && !edmg_bw_config) | |
1180 | return true; | |
1181 | ||
1182 | if ((!edmg_channels && edmg_bw_config) || | |
1183 | (edmg_channels && !edmg_bw_config)) | |
1184 | return false; | |
1185 | ||
1186 | if (!(edmg_channels & BIT(primary_channel - 1))) | |
1187 | return false; | |
1188 | ||
1189 | /* 60GHz channels 1..6 */ | |
1190 | for (i = 0; i < 6; i++) { | |
1191 | if (!(edmg_channels & BIT(i))) | |
1192 | continue; | |
1193 | ||
1194 | if (!(edmg_cap->channels & BIT(i))) | |
1195 | return false; | |
1196 | ||
1197 | channels_counter++; | |
1198 | ||
1199 | freq = ieee80211_channel_to_frequency(i + 1, | |
1200 | NL80211_BAND_60GHZ); | |
1201 | chan = ieee80211_get_channel(wiphy, freq); | |
1202 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
1203 | return false; | |
1204 | } | |
1205 | ||
1206 | /* IEEE802.11 allows max 4 channels */ | |
1207 | if (channels_counter > 4) | |
1208 | return false; | |
1209 | ||
1210 | /* check bw_config is a subset of what driver supports | |
1211 | * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13) | |
1212 | */ | |
1213 | if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4)) | |
1214 | return false; | |
1215 | ||
1216 | if (edmg_bw_config > edmg_cap->bw_config) | |
1217 | return false; | |
1218 | ||
1219 | return true; | |
1220 | } | |
1221 | ||
a110a3b7 JB |
1222 | bool _cfg80211_chandef_usable(struct wiphy *wiphy, |
1223 | const struct cfg80211_chan_def *chandef, | |
1224 | u32 prohibited_flags, bool monitor) | |
3d9d1d66 | 1225 | { |
9f5e8f6e JB |
1226 | struct ieee80211_sta_ht_cap *ht_cap; |
1227 | struct ieee80211_sta_vht_cap *vht_cap; | |
2a38075c | 1228 | struct ieee80211_edmg *edmg_cap; |
08f6f147 | 1229 | u32 width, control_freq, cap; |
3743bec6 JD |
1230 | bool ext_nss_cap, support_80_80 = false, support_320 = false; |
1231 | const struct ieee80211_sband_iftype_data *iftd; | |
1232 | struct ieee80211_supported_band *sband; | |
1233 | int i; | |
3d9d1d66 | 1234 | |
9f5e8f6e JB |
1235 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) |
1236 | return false; | |
3d9d1d66 | 1237 | |
9f5e8f6e JB |
1238 | ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap; |
1239 | vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap; | |
2a38075c | 1240 | edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap; |
e6ed929b WG |
1241 | ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) & |
1242 | IEEE80211_VHT_EXT_NSS_BW_CAPABLE; | |
2a38075c AAL |
1243 | |
1244 | if (edmg_cap->channels && | |
1245 | !cfg80211_edmg_usable(wiphy, | |
1246 | chandef->edmg.channels, | |
1247 | chandef->edmg.bw_config, | |
1248 | chandef->chan->hw_value, | |
1249 | edmg_cap)) | |
1250 | return false; | |
3d9d1d66 | 1251 | |
9f5e8f6e | 1252 | control_freq = chandef->chan->center_freq; |
9236d838 | 1253 | |
3d9d1d66 | 1254 | switch (chandef->width) { |
df78a0c0 TP |
1255 | case NL80211_CHAN_WIDTH_1: |
1256 | width = 1; | |
1257 | break; | |
1258 | case NL80211_CHAN_WIDTH_2: | |
1259 | width = 2; | |
1260 | break; | |
1261 | case NL80211_CHAN_WIDTH_4: | |
1262 | width = 4; | |
1263 | break; | |
1264 | case NL80211_CHAN_WIDTH_8: | |
1265 | width = 8; | |
1266 | break; | |
1267 | case NL80211_CHAN_WIDTH_16: | |
1268 | width = 16; | |
1269 | break; | |
2f301ab2 SW |
1270 | case NL80211_CHAN_WIDTH_5: |
1271 | width = 5; | |
1272 | break; | |
1273 | case NL80211_CHAN_WIDTH_10: | |
ea077c1c | 1274 | prohibited_flags |= IEEE80211_CHAN_NO_10MHZ; |
2f301ab2 SW |
1275 | width = 10; |
1276 | break; | |
3d9d1d66 | 1277 | case NL80211_CHAN_WIDTH_20: |
ba8f6a03 JB |
1278 | if (!ht_cap->ht_supported && |
1279 | chandef->chan->band != NL80211_BAND_6GHZ) | |
9f5e8f6e | 1280 | return false; |
df561f66 | 1281 | fallthrough; |
9f5e8f6e | 1282 | case NL80211_CHAN_WIDTH_20_NOHT: |
ea077c1c | 1283 | prohibited_flags |= IEEE80211_CHAN_NO_20MHZ; |
3d9d1d66 JB |
1284 | width = 20; |
1285 | break; | |
1286 | case NL80211_CHAN_WIDTH_40: | |
1287 | width = 40; | |
ba8f6a03 JB |
1288 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1289 | break; | |
9f5e8f6e JB |
1290 | if (!ht_cap->ht_supported) |
1291 | return false; | |
1292 | if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) || | |
1293 | ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT) | |
1294 | return false; | |
1295 | if (chandef->center_freq1 < control_freq && | |
1296 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
1297 | return false; | |
1298 | if (chandef->center_freq1 > control_freq && | |
1299 | chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
1300 | return false; | |
3d9d1d66 | 1301 | break; |
3d9d1d66 | 1302 | case NL80211_CHAN_WIDTH_80P80: |
35799944 SB |
1303 | cap = vht_cap->cap; |
1304 | support_80_80 = | |
1305 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || | |
1306 | (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
1307 | cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || | |
e6ed929b WG |
1308 | (ext_nss_cap && |
1309 | u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1); | |
35799944 | 1310 | if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80) |
9f5e8f6e | 1311 | return false; |
df561f66 | 1312 | fallthrough; |
9f5e8f6e | 1313 | case NL80211_CHAN_WIDTH_80: |
c7a6ee27 | 1314 | prohibited_flags |= IEEE80211_CHAN_NO_80MHZ; |
3d9d1d66 | 1315 | width = 80; |
ba8f6a03 JB |
1316 | if (chandef->chan->band == NL80211_BAND_6GHZ) |
1317 | break; | |
1318 | if (!vht_cap->vht_supported) | |
1319 | return false; | |
3d9d1d66 JB |
1320 | break; |
1321 | case NL80211_CHAN_WIDTH_160: | |
ba8f6a03 JB |
1322 | prohibited_flags |= IEEE80211_CHAN_NO_160MHZ; |
1323 | width = 160; | |
1324 | if (chandef->chan->band == NL80211_BAND_6GHZ) | |
1325 | break; | |
9f5e8f6e JB |
1326 | if (!vht_cap->vht_supported) |
1327 | return false; | |
08f6f147 JM |
1328 | cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
1329 | if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && | |
35799944 | 1330 | cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ && |
e6ed929b WG |
1331 | !(ext_nss_cap && |
1332 | (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) | |
9f5e8f6e | 1333 | return false; |
3d9d1d66 | 1334 | break; |
3743bec6 JD |
1335 | case NL80211_CHAN_WIDTH_320: |
1336 | prohibited_flags |= IEEE80211_CHAN_NO_320MHZ; | |
1337 | width = 320; | |
1338 | ||
1339 | if (chandef->chan->band != NL80211_BAND_6GHZ) | |
1340 | return false; | |
1341 | ||
1342 | sband = wiphy->bands[NL80211_BAND_6GHZ]; | |
1343 | if (!sband) | |
1344 | return false; | |
1345 | ||
e8c18412 | 1346 | for_each_sband_iftype_data(sband, i, iftd) { |
3743bec6 JD |
1347 | if (!iftd->eht_cap.has_eht) |
1348 | continue; | |
1349 | ||
1350 | if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] & | |
1351 | IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) { | |
1352 | support_320 = true; | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | if (!support_320) | |
1358 | return false; | |
1359 | break; | |
3d9d1d66 JB |
1360 | default: |
1361 | WARN_ON_ONCE(1); | |
9236d838 | 1362 | return false; |
4ee3e063 | 1363 | } |
3d9d1d66 | 1364 | |
c7a6ee27 JB |
1365 | /* |
1366 | * TODO: What if there are only certain 80/160/80+80 MHz channels | |
1367 | * allowed by the driver, or only certain combinations? | |
1368 | * For 40 MHz the driver can set the NO_HT40 flags, but for | |
1369 | * 80/160 MHz and in particular 80+80 MHz this isn't really | |
1370 | * feasible and we only have NO_80MHZ/NO_160MHZ so far but | |
1371 | * no way to cover 80+80 MHz or more complex restrictions. | |
1372 | * Note that such restrictions also need to be advertised to | |
1373 | * userspace, for example for P2P channel selection. | |
1374 | */ | |
9f5e8f6e | 1375 | |
a6662dba JB |
1376 | if (width > 20) |
1377 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1378 | ||
2f301ab2 SW |
1379 | /* 5 and 10 MHz are only defined for the OFDM PHY */ |
1380 | if (width < 20) | |
1381 | prohibited_flags |= IEEE80211_CHAN_NO_OFDM; | |
1382 | ||
1383 | ||
934f4c7d TP |
1384 | if (!cfg80211_secondary_chans_ok(wiphy, |
1385 | ieee80211_chandef_to_khz(chandef), | |
a110a3b7 | 1386 | width, prohibited_flags, monitor)) |
9f5e8f6e JB |
1387 | return false; |
1388 | ||
1389 | if (!chandef->center_freq2) | |
1390 | return true; | |
934f4c7d TP |
1391 | return cfg80211_secondary_chans_ok(wiphy, |
1392 | MHZ_TO_KHZ(chandef->center_freq2), | |
a110a3b7 JB |
1393 | width, prohibited_flags, monitor); |
1394 | } | |
1395 | ||
1396 | bool cfg80211_chandef_usable(struct wiphy *wiphy, | |
1397 | const struct cfg80211_chan_def *chandef, | |
1398 | u32 prohibited_flags) | |
1399 | { | |
1400 | return _cfg80211_chandef_usable(wiphy, chandef, prohibited_flags, | |
1401 | false); | |
9f5e8f6e JB |
1402 | } |
1403 | EXPORT_SYMBOL(cfg80211_chandef_usable); | |
1404 | ||
7b0a0e3c JB |
1405 | static bool cfg80211_ir_permissive_check_wdev(enum nl80211_iftype iftype, |
1406 | struct wireless_dev *wdev, | |
1407 | struct ieee80211_channel *chan) | |
1408 | { | |
1409 | struct ieee80211_channel *other_chan = NULL; | |
1410 | unsigned int link_id; | |
1411 | int r1, r2; | |
1412 | ||
1413 | for_each_valid_link(wdev, link_id) { | |
1414 | if (wdev->iftype == NL80211_IFTYPE_STATION && | |
1415 | wdev->links[link_id].client.current_bss) | |
1416 | other_chan = wdev->links[link_id].client.current_bss->pub.channel; | |
1417 | ||
1418 | /* | |
1419 | * If a GO already operates on the same GO_CONCURRENT channel, | |
1420 | * this one (maybe the same one) can beacon as well. We allow | |
1421 | * the operation even if the station we relied on with | |
1422 | * GO_CONCURRENT is disconnected now. But then we must make sure | |
1423 | * we're not outdoor on an indoor-only channel. | |
1424 | */ | |
1425 | if (iftype == NL80211_IFTYPE_P2P_GO && | |
1426 | wdev->iftype == NL80211_IFTYPE_P2P_GO && | |
1427 | wdev->links[link_id].ap.beacon_interval && | |
1428 | !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1429 | other_chan = wdev->links[link_id].ap.chandef.chan; | |
1430 | ||
1431 | if (!other_chan) | |
1432 | continue; | |
1433 | ||
1434 | if (chan == other_chan) | |
1435 | return true; | |
1436 | ||
1437 | if (chan->band != NL80211_BAND_5GHZ && | |
1438 | chan->band != NL80211_BAND_6GHZ) | |
1439 | continue; | |
1440 | ||
1441 | r1 = cfg80211_get_unii(chan->center_freq); | |
1442 | r2 = cfg80211_get_unii(other_chan->center_freq); | |
1443 | ||
1444 | if (r1 != -EINVAL && r1 == r2) { | |
1445 | /* | |
1446 | * At some locations channels 149-165 are considered a | |
1447 | * bundle, but at other locations, e.g., Indonesia, | |
1448 | * channels 149-161 are considered a bundle while | |
1449 | * channel 165 is left out and considered to be in a | |
1450 | * different bundle. Thus, in case that there is a | |
1451 | * station interface connected to an AP on channel 165, | |
1452 | * it is assumed that channels 149-161 are allowed for | |
1453 | * GO operations. However, having a station interface | |
1454 | * connected to an AP on channels 149-161, does not | |
1455 | * allow GO operation on channel 165. | |
1456 | */ | |
1457 | if (chan->center_freq == 5825 && | |
1458 | other_chan->center_freq != 5825) | |
1459 | continue; | |
1460 | return true; | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | return false; | |
1465 | } | |
1466 | ||
174e0cd2 | 1467 | /* |
06f207fc AN |
1468 | * Check if the channel can be used under permissive conditions mandated by |
1469 | * some regulatory bodies, i.e., the channel is marked with | |
1470 | * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface | |
174e0cd2 IP |
1471 | * associated to an AP on the same channel or on the same UNII band |
1472 | * (assuming that the AP is an authorized master). | |
06f207fc | 1473 | * In addition allow operation on a channel on which indoor operation is |
c8866e55 | 1474 | * allowed, iff we are currently operating in an indoor environment. |
174e0cd2 | 1475 | */ |
06f207fc AN |
1476 | static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, |
1477 | enum nl80211_iftype iftype, | |
174e0cd2 IP |
1478 | struct ieee80211_channel *chan) |
1479 | { | |
be69c24a | 1480 | struct wireless_dev *wdev; |
06f207fc | 1481 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
174e0cd2 | 1482 | |
a05829a7 | 1483 | lockdep_assert_held(&rdev->wiphy.mtx); |
174e0cd2 | 1484 | |
97f2645f | 1485 | if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) || |
c8866e55 IP |
1486 | !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)) |
1487 | return false; | |
1488 | ||
06f207fc AN |
1489 | /* only valid for GO and TDLS off-channel (station/p2p-CL) */ |
1490 | if (iftype != NL80211_IFTYPE_P2P_GO && | |
1491 | iftype != NL80211_IFTYPE_STATION && | |
1492 | iftype != NL80211_IFTYPE_P2P_CLIENT) | |
1493 | return false; | |
1494 | ||
c8866e55 IP |
1495 | if (regulatory_indoor_allowed() && |
1496 | (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) | |
1497 | return true; | |
1498 | ||
06f207fc | 1499 | if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT)) |
174e0cd2 IP |
1500 | return false; |
1501 | ||
1502 | /* | |
1503 | * Generally, it is possible to rely on another device/driver to allow | |
06f207fc | 1504 | * the IR concurrent relaxation, however, since the device can further |
174e0cd2 IP |
1505 | * enforce the relaxation (by doing a similar verifications as this), |
1506 | * and thus fail the GO instantiation, consider only the interfaces of | |
1507 | * the current registered device. | |
1508 | */ | |
53873f13 | 1509 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
7b0a0e3c | 1510 | bool ret; |
174e0cd2 | 1511 | |
7b0a0e3c | 1512 | ret = cfg80211_ir_permissive_check_wdev(iftype, wdev, chan); |
7b0a0e3c JB |
1513 | if (ret) |
1514 | return ret; | |
174e0cd2 IP |
1515 | } |
1516 | ||
1517 | return false; | |
1518 | } | |
1519 | ||
923b352f AN |
1520 | static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, |
1521 | struct cfg80211_chan_def *chandef, | |
1522 | enum nl80211_iftype iftype, | |
1523 | bool check_no_ir) | |
9f5e8f6e JB |
1524 | { |
1525 | bool res; | |
41a313d8 AO |
1526 | u32 prohibited_flags = IEEE80211_CHAN_DISABLED; |
1527 | int dfs_required; | |
9f5e8f6e | 1528 | |
923b352f | 1529 | trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); |
174e0cd2 | 1530 | |
923b352f | 1531 | if (check_no_ir) |
174e0cd2 | 1532 | prohibited_flags |= IEEE80211_CHAN_NO_IR; |
3d9d1d66 | 1533 | |
41a313d8 AO |
1534 | dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype); |
1535 | if (dfs_required != 0) | |
1536 | prohibited_flags |= IEEE80211_CHAN_RADAR; | |
1537 | ||
1538 | if (dfs_required > 0 && | |
6bc54fbc JD |
1539 | cfg80211_chandef_dfs_available(wiphy, chandef)) { |
1540 | /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ | |
1541 | prohibited_flags = IEEE80211_CHAN_DISABLED; | |
1542 | } | |
1543 | ||
1544 | res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); | |
3d9d1d66 JB |
1545 | |
1546 | trace_cfg80211_return_bool(res); | |
1547 | return res; | |
9236d838 | 1548 | } |
923b352f AN |
1549 | |
1550 | bool cfg80211_reg_can_beacon(struct wiphy *wiphy, | |
1551 | struct cfg80211_chan_def *chandef, | |
1552 | enum nl80211_iftype iftype) | |
1553 | { | |
1554 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); | |
1555 | } | |
683b6d3b | 1556 | EXPORT_SYMBOL(cfg80211_reg_can_beacon); |
9236d838 | 1557 | |
923b352f AN |
1558 | bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, |
1559 | struct cfg80211_chan_def *chandef, | |
1560 | enum nl80211_iftype iftype) | |
1561 | { | |
a05829a7 | 1562 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
923b352f AN |
1563 | bool check_no_ir; |
1564 | ||
a05829a7 | 1565 | lockdep_assert_held(&rdev->wiphy.mtx); |
923b352f AN |
1566 | |
1567 | /* | |
1568 | * Under certain conditions suggested by some regulatory bodies a | |
1569 | * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag | |
1570 | * only if such relaxations are not enabled and the conditions are not | |
1571 | * met. | |
1572 | */ | |
1573 | check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, | |
1574 | chandef->chan); | |
1575 | ||
1576 | return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); | |
1577 | } | |
1578 | EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); | |
1579 | ||
e8c9bd5b | 1580 | int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, |
683b6d3b | 1581 | struct cfg80211_chan_def *chandef) |
9588bbd5 | 1582 | { |
e8c9bd5b | 1583 | if (!rdev->ops->set_monitor_channel) |
9588bbd5 | 1584 | return -EOPNOTSUPP; |
4f03c1ed MK |
1585 | if (!cfg80211_has_monitors_only(rdev)) |
1586 | return -EBUSY; | |
9588bbd5 | 1587 | |
683b6d3b | 1588 | return rdev_set_monitor_channel(rdev, chandef); |
59bbb6f7 | 1589 | } |
26ab9a0c | 1590 | |
be989891 JB |
1591 | bool cfg80211_any_usable_channels(struct wiphy *wiphy, |
1592 | unsigned long sband_mask, | |
1593 | u32 prohibited_flags) | |
1594 | { | |
1595 | int idx; | |
1596 | ||
1597 | prohibited_flags |= IEEE80211_CHAN_DISABLED; | |
1598 | ||
1599 | for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) { | |
1600 | struct ieee80211_supported_band *sband = wiphy->bands[idx]; | |
1601 | int chanidx; | |
1602 | ||
1603 | if (!sband) | |
1604 | continue; | |
1605 | ||
1606 | for (chanidx = 0; chanidx < sband->n_channels; chanidx++) { | |
1607 | struct ieee80211_channel *chan; | |
1608 | ||
1609 | chan = &sband->channels[chanidx]; | |
1610 | ||
1611 | if (chan->flags & prohibited_flags) | |
1612 | continue; | |
1613 | ||
1614 | return true; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | return false; | |
1619 | } | |
1620 | EXPORT_SYMBOL(cfg80211_any_usable_channels); | |
7b0a0e3c JB |
1621 | |
1622 | struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev, | |
1623 | unsigned int link_id) | |
1624 | { | |
076fc877 JB |
1625 | lockdep_assert_wiphy(wdev->wiphy); |
1626 | ||
1627 | WARN_ON(wdev->valid_links && !(wdev->valid_links & BIT(link_id))); | |
1628 | WARN_ON(!wdev->valid_links && link_id > 0); | |
7b0a0e3c JB |
1629 | |
1630 | switch (wdev->iftype) { | |
1631 | case NL80211_IFTYPE_MESH_POINT: | |
1632 | return &wdev->u.mesh.chandef; | |
1633 | case NL80211_IFTYPE_ADHOC: | |
1634 | return &wdev->u.ibss.chandef; | |
1635 | case NL80211_IFTYPE_OCB: | |
1636 | return &wdev->u.ocb.chandef; | |
1637 | case NL80211_IFTYPE_AP: | |
1638 | case NL80211_IFTYPE_P2P_GO: | |
1639 | return &wdev->links[link_id].ap.chandef; | |
1640 | default: | |
1641 | return NULL; | |
1642 | } | |
1643 | } | |
1644 | EXPORT_SYMBOL(wdev_chandef); |