1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * VHT handling
4 *
5 * Portions of this file
6 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
7 * Copyright (C) 2018 - 2020 Intel Corporation
8 */
9
10 #include <linux/ieee80211.h>
11 #include <linux/export.h>
12 #include <net/mac80211.h>
13 #include "ieee80211_i.h"
14 #include "rate.h"
15
16
__check_vhtcap_disable(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap,u32 flag)17 static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
18 struct ieee80211_sta_vht_cap *vht_cap,
19 u32 flag)
20 {
21 __le32 le_flag = cpu_to_le32(flag);
22
23 if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
24 !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
25 vht_cap->cap &= ~flag;
26 }
27
ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap)28 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
29 struct ieee80211_sta_vht_cap *vht_cap)
30 {
31 int i;
32 u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
33
34 if (!vht_cap->vht_supported)
35 return;
36
37 if (sdata->vif.type != NL80211_IFTYPE_STATION)
38 return;
39
40 __check_vhtcap_disable(sdata, vht_cap,
41 IEEE80211_VHT_CAP_RXLDPC);
42 __check_vhtcap_disable(sdata, vht_cap,
43 IEEE80211_VHT_CAP_SHORT_GI_80);
44 __check_vhtcap_disable(sdata, vht_cap,
45 IEEE80211_VHT_CAP_SHORT_GI_160);
46 __check_vhtcap_disable(sdata, vht_cap,
47 IEEE80211_VHT_CAP_TXSTBC);
48 __check_vhtcap_disable(sdata, vht_cap,
49 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
50 __check_vhtcap_disable(sdata, vht_cap,
51 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
52 __check_vhtcap_disable(sdata, vht_cap,
53 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
54 __check_vhtcap_disable(sdata, vht_cap,
55 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
56
57 /* Allow user to decrease AMPDU length exponent */
58 if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
59 cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
60 u32 cap, n;
61
62 n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
63 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
64 n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
65 cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
66 cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
67
68 if (n < cap) {
69 vht_cap->cap &=
70 ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
71 vht_cap->cap |=
72 n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
73 }
74 }
75
76 /* Allow the user to decrease MCSes */
77 rxmcs_mask =
78 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
79 rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
80 rxmcs_n &= rxmcs_mask;
81 rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
82
83 txmcs_mask =
84 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
85 txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
86 txmcs_n &= txmcs_mask;
87 txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
88 for (i = 0; i < 8; i++) {
89 u8 m, n, c;
90
91 m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
92 n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
93 c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
94
95 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
96 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
97 rxmcs_cap &= ~(3 << 2*i);
98 rxmcs_cap |= (rxmcs_n & (3 << 2*i));
99 }
100
101 m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
102 n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
103 c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
104
105 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
106 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
107 txmcs_cap &= ~(3 << 2*i);
108 txmcs_cap |= (txmcs_n & (3 << 2*i));
109 }
110 }
111 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
112 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
113 }
114
115 void
ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_vht_cap * vht_cap_ie,struct sta_info * sta)116 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
117 struct ieee80211_supported_band *sband,
118 const struct ieee80211_vht_cap *vht_cap_ie,
119 struct sta_info *sta)
120 {
121 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
122 struct ieee80211_sta_vht_cap own_cap;
123 u32 cap_info, i;
124 bool have_80mhz;
125
126 memset(vht_cap, 0, sizeof(*vht_cap));
127
128 if (!sta->sta.ht_cap.ht_supported)
129 return;
130
131 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
132 return;
133
134 /* Allow VHT if at least one channel on the sband supports 80 MHz */
135 have_80mhz = false;
136 for (i = 0; i < sband->n_channels; i++) {
137 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
138 IEEE80211_CHAN_NO_80MHZ))
139 continue;
140
141 have_80mhz = true;
142 break;
143 }
144
145 if (!have_80mhz)
146 return;
147
148 /*
149 * A VHT STA must support 40 MHz, but if we verify that here
150 * then we break a few things - some APs (e.g. Netgear R6300v2
151 * and others based on the BCM4360 chipset) will unset this
152 * capability bit when operating in 20 MHz.
153 */
154
155 vht_cap->vht_supported = true;
156
157 own_cap = sband->vht_cap;
158 /*
159 * If user has specified capability overrides, take care
160 * of that if the station we're setting up is the AP that
161 * we advertised a restricted capability set to. Override
162 * our own capabilities and then use those below.
163 */
164 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
165 !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
166 ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
167
168 /* take some capabilities as-is */
169 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
170 vht_cap->cap = cap_info;
171 vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC |
172 IEEE80211_VHT_CAP_VHT_TXOP_PS |
173 IEEE80211_VHT_CAP_HTC_VHT |
174 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
175 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
176 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
177 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
178 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
179
180 vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK,
181 own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK);
182
183 /* and some based on our own capabilities */
184 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
185 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
186 vht_cap->cap |= cap_info &
187 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
188 break;
189 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
190 vht_cap->cap |= cap_info &
191 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
192 break;
193 default:
194 /* nothing */
195 break;
196 }
197
198 /* symmetric capabilities */
199 vht_cap->cap |= cap_info & own_cap.cap &
200 (IEEE80211_VHT_CAP_SHORT_GI_80 |
201 IEEE80211_VHT_CAP_SHORT_GI_160);
202
203 /* remaining ones */
204 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
205 vht_cap->cap |= cap_info &
206 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
207 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
208
209 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
210 vht_cap->cap |= cap_info &
211 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
212 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
213
214 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
215 vht_cap->cap |= cap_info &
216 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
217
218 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
219 vht_cap->cap |= cap_info &
220 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
221
222 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
223 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
224
225 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
226 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
227
228 /* Copy peer MCS info, the driver might need them. */
229 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
230 sizeof(struct ieee80211_vht_mcs_info));
231
232 /* copy EXT_NSS_BW Support value or remove the capability */
233 if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW))
234 vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
235 else
236 vht_cap->vht_mcs.tx_highest &=
237 ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
238
239 /* but also restrict MCSes */
240 for (i = 0; i < 8; i++) {
241 u16 own_rx, own_tx, peer_rx, peer_tx;
242
243 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
244 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
245
246 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
247 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
248
249 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
250 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
251
252 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
253 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
254
255 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
256 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
257 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
258 else if (own_rx < peer_tx)
259 peer_tx = own_rx;
260 }
261
262 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
263 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
264 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
265 else if (own_tx < peer_rx)
266 peer_rx = own_tx;
267 }
268
269 vht_cap->vht_mcs.rx_mcs_map &=
270 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
271 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
272
273 vht_cap->vht_mcs.tx_mcs_map &=
274 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
275 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
276 }
277
278 /*
279 * This is a workaround for VHT-enabled STAs which break the spec
280 * and have the VHT-MCS Rx map filled in with value 3 for all eight
281 * spacial streams, an example is AR9462.
282 *
283 * As per spec, in section 22.1.1 Introduction to the VHT PHY
284 * A VHT STA shall support at least single spactial stream VHT-MCSs
285 * 0 to 7 (transmit and receive) in all supported channel widths.
286 */
287 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
288 vht_cap->vht_supported = false;
289 sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n",
290 sta->addr);
291 return;
292 }
293
294 /* finally set up the bandwidth */
295 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
296 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
297 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
298 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
299 break;
300 default:
301 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
302
303 if (!(vht_cap->vht_mcs.tx_highest &
304 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
305 break;
306
307 /*
308 * If this is non-zero, then it does support 160 MHz after all,
309 * in one form or the other. We don't distinguish here (or even
310 * above) between 160 and 80+80 yet.
311 */
312 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
313 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
314 }
315
316 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
317
318 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
319 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
320 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
321 break;
322 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
323 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
324 break;
325 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
326 default:
327 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
328 break;
329 }
330 }
331
332 /* FIXME: move this to some better location - parses HE now */
ieee80211_sta_cap_rx_bw(struct sta_info * sta)333 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
334 {
335 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
336 struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
337 u32 cap_width;
338
339 if (he_cap->has_he) {
340 u8 info = he_cap->he_cap_elem.phy_cap_info[0];
341
342 if (sta->sdata->vif.bss_conf.chandef.chan->band ==
343 NL80211_BAND_2GHZ) {
344 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
345 return IEEE80211_STA_RX_BW_40;
346 else
347 return IEEE80211_STA_RX_BW_20;
348 }
349
350 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
351 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
352 return IEEE80211_STA_RX_BW_160;
353 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
354 return IEEE80211_STA_RX_BW_80;
355
356 return IEEE80211_STA_RX_BW_20;
357 }
358
359 if (!vht_cap->vht_supported)
360 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
361 IEEE80211_STA_RX_BW_40 :
362 IEEE80211_STA_RX_BW_20;
363
364 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
365
366 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
367 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
368 return IEEE80211_STA_RX_BW_160;
369
370 /*
371 * If this is non-zero, then it does support 160 MHz after all,
372 * in one form or the other. We don't distinguish here (or even
373 * above) between 160 and 80+80 yet.
374 */
375 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
376 return IEEE80211_STA_RX_BW_160;
377
378 return IEEE80211_STA_RX_BW_80;
379 }
380
ieee80211_sta_cap_chan_bw(struct sta_info * sta)381 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta)
382 {
383 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
384 u32 cap_width;
385
386 if (!vht_cap->vht_supported) {
387 if (!sta->sta.ht_cap.ht_supported)
388 return NL80211_CHAN_WIDTH_20_NOHT;
389
390 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
391 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
392 }
393
394 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
395
396 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
397 return NL80211_CHAN_WIDTH_160;
398 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
399 return NL80211_CHAN_WIDTH_80P80;
400
401 return NL80211_CHAN_WIDTH_80;
402 }
403
404 enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct sta_info * sta)405 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta)
406 {
407 enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth;
408 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
409 u32 cap_width;
410
411 switch (cur_bw) {
412 case IEEE80211_STA_RX_BW_20:
413 if (!sta->sta.ht_cap.ht_supported)
414 return NL80211_CHAN_WIDTH_20_NOHT;
415 else
416 return NL80211_CHAN_WIDTH_20;
417 case IEEE80211_STA_RX_BW_40:
418 return NL80211_CHAN_WIDTH_40;
419 case IEEE80211_STA_RX_BW_80:
420 return NL80211_CHAN_WIDTH_80;
421 case IEEE80211_STA_RX_BW_160:
422 cap_width =
423 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
424
425 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
426 return NL80211_CHAN_WIDTH_160;
427
428 return NL80211_CHAN_WIDTH_80P80;
429 default:
430 return NL80211_CHAN_WIDTH_20;
431 }
432 }
433
434 enum ieee80211_sta_rx_bandwidth
ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)435 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
436 {
437 switch (width) {
438 case NL80211_CHAN_WIDTH_20_NOHT:
439 case NL80211_CHAN_WIDTH_20:
440 return IEEE80211_STA_RX_BW_20;
441 case NL80211_CHAN_WIDTH_40:
442 return IEEE80211_STA_RX_BW_40;
443 case NL80211_CHAN_WIDTH_80:
444 return IEEE80211_STA_RX_BW_80;
445 case NL80211_CHAN_WIDTH_160:
446 case NL80211_CHAN_WIDTH_80P80:
447 return IEEE80211_STA_RX_BW_160;
448 default:
449 WARN_ON_ONCE(1);
450 return IEEE80211_STA_RX_BW_20;
451 }
452 }
453
454 /* FIXME: rename/move - this deals with everything not just VHT */
ieee80211_sta_cur_vht_bw(struct sta_info * sta)455 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
456 {
457 struct ieee80211_sub_if_data *sdata = sta->sdata;
458 enum ieee80211_sta_rx_bandwidth bw;
459 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
460
461 bw = ieee80211_sta_cap_rx_bw(sta);
462 bw = min(bw, sta->cur_max_bandwidth);
463
464 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
465 * IEEE80211-2016 specification makes higher bandwidth operation
466 * possible on the TDLS link if the peers have wider bandwidth
467 * capability.
468 *
469 * However, in this case, and only if the TDLS peer is authorized,
470 * limit to the tdls_chandef so that the configuration here isn't
471 * wider than what's actually requested on the channel context.
472 */
473 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
474 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) &&
475 test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
476 sta->tdls_chandef.chan)
477 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width));
478 else
479 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
480
481 return bw;
482 }
483
ieee80211_sta_set_rx_nss(struct sta_info * sta)484 void ieee80211_sta_set_rx_nss(struct sta_info *sta)
485 {
486 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, rx_nss;
487 bool support_160;
488
489 /* if we received a notification already don't overwrite it */
490 if (sta->sta.rx_nss)
491 return;
492
493 if (sta->sta.he_cap.has_he) {
494 int i;
495 u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
496 const struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
497 u16 mcs_160_map =
498 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
499 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
500
501 for (i = 7; i >= 0; i--) {
502 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3;
503
504 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
505 rx_mcs_160 = i + 1;
506 break;
507 }
508 }
509 for (i = 7; i >= 0; i--) {
510 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3;
511
512 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
513 rx_mcs_80 = i + 1;
514 break;
515 }
516 }
517
518 support_160 = he_cap->he_cap_elem.phy_cap_info[0] &
519 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
520
521 if (support_160)
522 he_rx_nss = min(rx_mcs_80, rx_mcs_160);
523 else
524 he_rx_nss = rx_mcs_80;
525 }
526
527 if (sta->sta.ht_cap.ht_supported) {
528 if (sta->sta.ht_cap.mcs.rx_mask[0])
529 ht_rx_nss++;
530 if (sta->sta.ht_cap.mcs.rx_mask[1])
531 ht_rx_nss++;
532 if (sta->sta.ht_cap.mcs.rx_mask[2])
533 ht_rx_nss++;
534 if (sta->sta.ht_cap.mcs.rx_mask[3])
535 ht_rx_nss++;
536 /* FIXME: consider rx_highest? */
537 }
538
539 if (sta->sta.vht_cap.vht_supported) {
540 int i;
541 u16 rx_mcs_map;
542
543 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
544
545 for (i = 7; i >= 0; i--) {
546 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
547
548 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
549 vht_rx_nss = i + 1;
550 break;
551 }
552 }
553 /* FIXME: consider rx_highest? */
554 }
555
556 rx_nss = max(vht_rx_nss, ht_rx_nss);
557 rx_nss = max(he_rx_nss, rx_nss);
558 sta->sta.rx_nss = max_t(u8, 1, rx_nss);
559 }
560
__ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)561 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
562 struct sta_info *sta, u8 opmode,
563 enum nl80211_band band)
564 {
565 enum ieee80211_sta_rx_bandwidth new_bw;
566 struct sta_opmode_info sta_opmode = {};
567 u32 changed = 0;
568 u8 nss;
569
570 /* ignore - no support for BF yet */
571 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
572 return 0;
573
574 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
575 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
576 nss += 1;
577
578 if (sta->sta.rx_nss != nss) {
579 sta->sta.rx_nss = nss;
580 sta_opmode.rx_nss = nss;
581 changed |= IEEE80211_RC_NSS_CHANGED;
582 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
583 }
584
585 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
586 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
587 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
588 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
589 break;
590 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
591 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
592 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
593 break;
594 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
595 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
596 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
597 else
598 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
599 break;
600 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
601 /* legacy only, no longer used by newer spec */
602 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
603 break;
604 }
605
606 new_bw = ieee80211_sta_cur_vht_bw(sta);
607 if (new_bw != sta->sta.bandwidth) {
608 sta->sta.bandwidth = new_bw;
609 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta);
610 changed |= IEEE80211_RC_BW_CHANGED;
611 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
612 }
613
614 if (sta_opmode.changed)
615 cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr,
616 &sta_opmode, GFP_KERNEL);
617
618 return changed;
619 }
620
ieee80211_process_mu_groups(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt)621 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
622 struct ieee80211_mgmt *mgmt)
623 {
624 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
625
626 if (!sdata->vif.mu_mimo_owner)
627 return;
628
629 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
630 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
631 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
632 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
633 return;
634
635 memcpy(bss_conf->mu_group.membership,
636 mgmt->u.action.u.vht_group_notif.membership,
637 WLAN_MEMBERSHIP_LEN);
638 memcpy(bss_conf->mu_group.position,
639 mgmt->u.action.u.vht_group_notif.position,
640 WLAN_USER_POSITION_LEN);
641
642 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
643 }
644
ieee80211_update_mu_groups(struct ieee80211_vif * vif,const u8 * membership,const u8 * position)645 void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
646 const u8 *membership, const u8 *position)
647 {
648 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
649
650 if (WARN_ON_ONCE(!vif->mu_mimo_owner))
651 return;
652
653 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN);
654 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN);
655 }
656 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
657
ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)658 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
659 struct sta_info *sta, u8 opmode,
660 enum nl80211_band band)
661 {
662 struct ieee80211_local *local = sdata->local;
663 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
664
665 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band);
666
667 if (changed > 0) {
668 ieee80211_recalc_min_chandef(sdata);
669 rate_control_rate_update(local, sband, sta, changed);
670 }
671 }
672
ieee80211_get_vht_mask_from_cap(__le16 vht_cap,u16 vht_mask[NL80211_VHT_NSS_MAX])673 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
674 u16 vht_mask[NL80211_VHT_NSS_MAX])
675 {
676 int i;
677 u16 mask, cap = le16_to_cpu(vht_cap);
678
679 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
680 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
681 switch (mask) {
682 case IEEE80211_VHT_MCS_SUPPORT_0_7:
683 vht_mask[i] = 0x00FF;
684 break;
685 case IEEE80211_VHT_MCS_SUPPORT_0_8:
686 vht_mask[i] = 0x01FF;
687 break;
688 case IEEE80211_VHT_MCS_SUPPORT_0_9:
689 vht_mask[i] = 0x03FF;
690 break;
691 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
692 default:
693 vht_mask[i] = 0;
694 break;
695 }
696 }
697 }
698