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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 - 2022 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
17static 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
28void 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
115void
116ieee80211_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 link_sta_info *link_sta)
120{
121 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->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 (!link_sta->pub->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(link_sta->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,
290 "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n",
291 link_sta->sta->addr, link_sta->addr);
292 return;
293 }
294
295 /* finally set up the bandwidth */
296 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
297 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
298 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
299 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
300 break;
301 default:
302 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
303
304 if (!(vht_cap->vht_mcs.tx_highest &
305 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
306 break;
307
308 /*
309 * If this is non-zero, then it does support 160 MHz after all,
310 * in one form or the other. We don't distinguish here (or even
311 * above) between 160 and 80+80 yet.
312 */
313 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
314 link_sta->cur_max_bandwidth =
315 IEEE80211_STA_RX_BW_160;
316 }
317
318 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
319
320 /*
321 * FIXME - should the amsdu len be per link? store per link
322 * and maintain a minimum?
323 */
324 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
325 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
326 link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
327 break;
328 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
329 link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
330 break;
331 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
332 default:
333 link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
334 break;
335 }
336}
337
338/* FIXME: move this to some better location - parses HE/EHT now */
339enum ieee80211_sta_rx_bandwidth
340ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta)
341{
342 unsigned int link_id = link_sta->link_id;
343 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
344 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
345 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
346 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
347 u32 cap_width;
348
349 if (he_cap->has_he) {
350 struct ieee80211_bss_conf *link_conf;
351 enum ieee80211_sta_rx_bandwidth ret;
352 u8 info;
353
354 rcu_read_lock();
355 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
356
357 if (eht_cap->has_eht &&
358 link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
359 info = eht_cap->eht_cap_elem.phy_cap_info[0];
360
361 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
362 ret = IEEE80211_STA_RX_BW_320;
363 goto out;
364 }
365 }
366
367 info = he_cap->he_cap_elem.phy_cap_info[0];
368
369 if (link_conf->chandef.chan->band == NL80211_BAND_2GHZ) {
370 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
371 ret = IEEE80211_STA_RX_BW_40;
372 else
373 ret = IEEE80211_STA_RX_BW_20;
374 goto out;
375 }
376
377 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
378 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
379 ret = IEEE80211_STA_RX_BW_160;
380 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
381 ret = IEEE80211_STA_RX_BW_80;
382 else
383 ret = IEEE80211_STA_RX_BW_20;
384out:
385 rcu_read_unlock();
386
387 return ret;
388 }
389
390 if (!vht_cap->vht_supported)
391 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
392 IEEE80211_STA_RX_BW_40 :
393 IEEE80211_STA_RX_BW_20;
394
395 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
396
397 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
398 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
399 return IEEE80211_STA_RX_BW_160;
400
401 /*
402 * If this is non-zero, then it does support 160 MHz after all,
403 * in one form or the other. We don't distinguish here (or even
404 * above) between 160 and 80+80 yet.
405 */
406 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
407 return IEEE80211_STA_RX_BW_160;
408
409 return IEEE80211_STA_RX_BW_80;
410}
411
412enum nl80211_chan_width
413ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
414{
415 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
416 u32 cap_width;
417
418 if (!vht_cap->vht_supported) {
419 if (!link_sta->pub->ht_cap.ht_supported)
420 return NL80211_CHAN_WIDTH_20_NOHT;
421
422 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
423 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
424 }
425
426 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
427
428 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
429 return NL80211_CHAN_WIDTH_160;
430 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
431 return NL80211_CHAN_WIDTH_80P80;
432
433 return NL80211_CHAN_WIDTH_80;
434}
435
436enum nl80211_chan_width
437ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
438{
439 enum ieee80211_sta_rx_bandwidth cur_bw =
440 link_sta->pub->bandwidth;
441 struct ieee80211_sta_vht_cap *vht_cap =
442 &link_sta->pub->vht_cap;
443 u32 cap_width;
444
445 switch (cur_bw) {
446 case IEEE80211_STA_RX_BW_20:
447 if (!link_sta->pub->ht_cap.ht_supported)
448 return NL80211_CHAN_WIDTH_20_NOHT;
449 else
450 return NL80211_CHAN_WIDTH_20;
451 case IEEE80211_STA_RX_BW_40:
452 return NL80211_CHAN_WIDTH_40;
453 case IEEE80211_STA_RX_BW_80:
454 return NL80211_CHAN_WIDTH_80;
455 case IEEE80211_STA_RX_BW_160:
456 cap_width =
457 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
458
459 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
460 return NL80211_CHAN_WIDTH_160;
461
462 return NL80211_CHAN_WIDTH_80P80;
463 default:
464 return NL80211_CHAN_WIDTH_20;
465 }
466}
467
468enum ieee80211_sta_rx_bandwidth
469ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
470{
471 switch (width) {
472 case NL80211_CHAN_WIDTH_20_NOHT:
473 case NL80211_CHAN_WIDTH_20:
474 return IEEE80211_STA_RX_BW_20;
475 case NL80211_CHAN_WIDTH_40:
476 return IEEE80211_STA_RX_BW_40;
477 case NL80211_CHAN_WIDTH_80:
478 return IEEE80211_STA_RX_BW_80;
479 case NL80211_CHAN_WIDTH_160:
480 case NL80211_CHAN_WIDTH_80P80:
481 return IEEE80211_STA_RX_BW_160;
482 case NL80211_CHAN_WIDTH_320:
483 return IEEE80211_STA_RX_BW_320;
484 default:
485 WARN_ON_ONCE(1);
486 return IEEE80211_STA_RX_BW_20;
487 }
488}
489
490/* FIXME: rename/move - this deals with everything not just VHT */
491enum ieee80211_sta_rx_bandwidth
492ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta)
493{
494 struct sta_info *sta = link_sta->sta;
495 struct ieee80211_bss_conf *link_conf;
496 enum nl80211_chan_width bss_width;
497 enum ieee80211_sta_rx_bandwidth bw;
498
499 rcu_read_lock();
500 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]);
501 if (WARN_ON(!link_conf))
502 bss_width = NL80211_CHAN_WIDTH_20_NOHT;
503 else
504 bss_width = link_conf->chandef.width;
505 rcu_read_unlock();
506
507 bw = ieee80211_sta_cap_rx_bw(link_sta);
508 bw = min(bw, link_sta->cur_max_bandwidth);
509
510 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
511 * IEEE80211-2016 specification makes higher bandwidth operation
512 * possible on the TDLS link if the peers have wider bandwidth
513 * capability.
514 *
515 * However, in this case, and only if the TDLS peer is authorized,
516 * limit to the tdls_chandef so that the configuration here isn't
517 * wider than what's actually requested on the channel context.
518 */
519 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
520 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) &&
521 test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
522 sta->tdls_chandef.chan)
523 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width));
524 else
525 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
526
527 return bw;
528}
529
530void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta)
531{
532 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
533 bool support_160;
534
535 /* if we received a notification already don't overwrite it */
536 if (link_sta->pub->rx_nss)
537 return;
538
539 if (link_sta->pub->eht_cap.has_eht) {
540 int i;
541 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
542
543 /* get the max nss for EHT over all possible bandwidths and mcs */
544 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
545 eht_rx_nss = max_t(u8, eht_rx_nss,
546 u8_get_bits(rx_nss_mcs[i],
547 IEEE80211_EHT_MCS_NSS_RX));
548 }
549
550 if (link_sta->pub->he_cap.has_he) {
551 int i;
552 u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
553 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
554 u16 mcs_160_map =
555 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
556 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
557
558 for (i = 7; i >= 0; i--) {
559 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3;
560
561 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
562 rx_mcs_160 = i + 1;
563 break;
564 }
565 }
566 for (i = 7; i >= 0; i--) {
567 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3;
568
569 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
570 rx_mcs_80 = i + 1;
571 break;
572 }
573 }
574
575 support_160 = he_cap->he_cap_elem.phy_cap_info[0] &
576 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
577
578 if (support_160)
579 he_rx_nss = min(rx_mcs_80, rx_mcs_160);
580 else
581 he_rx_nss = rx_mcs_80;
582 }
583
584 if (link_sta->pub->ht_cap.ht_supported) {
585 if (link_sta->pub->ht_cap.mcs.rx_mask[0])
586 ht_rx_nss++;
587 if (link_sta->pub->ht_cap.mcs.rx_mask[1])
588 ht_rx_nss++;
589 if (link_sta->pub->ht_cap.mcs.rx_mask[2])
590 ht_rx_nss++;
591 if (link_sta->pub->ht_cap.mcs.rx_mask[3])
592 ht_rx_nss++;
593 /* FIXME: consider rx_highest? */
594 }
595
596 if (link_sta->pub->vht_cap.vht_supported) {
597 int i;
598 u16 rx_mcs_map;
599
600 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map);
601
602 for (i = 7; i >= 0; i--) {
603 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
604
605 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
606 vht_rx_nss = i + 1;
607 break;
608 }
609 }
610 /* FIXME: consider rx_highest? */
611 }
612
613 rx_nss = max(vht_rx_nss, ht_rx_nss);
614 rx_nss = max(he_rx_nss, rx_nss);
615 rx_nss = max(eht_rx_nss, rx_nss);
616 link_sta->pub->rx_nss = max_t(u8, 1, rx_nss);
617}
618
619u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
620 struct link_sta_info *link_sta,
621 u8 opmode, enum nl80211_band band)
622{
623 enum ieee80211_sta_rx_bandwidth new_bw;
624 struct sta_opmode_info sta_opmode = {};
625 u32 changed = 0;
626 u8 nss;
627
628 /* ignore - no support for BF yet */
629 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
630 return 0;
631
632 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
633 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
634 nss += 1;
635
636 if (link_sta->pub->rx_nss != nss) {
637 link_sta->pub->rx_nss = nss;
638 sta_opmode.rx_nss = nss;
639 changed |= IEEE80211_RC_NSS_CHANGED;
640 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
641 }
642
643 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
644 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
645 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
646 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
647 break;
648 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
649 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
650 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
651 break;
652 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
653 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
654 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
655 else
656 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
657 break;
658 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
659 /* legacy only, no longer used by newer spec */
660 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
661 break;
662 }
663
664 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
665 if (new_bw != link_sta->pub->bandwidth) {
666 link_sta->pub->bandwidth = new_bw;
667 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta);
668 changed |= IEEE80211_RC_BW_CHANGED;
669 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
670 }
671
672 if (sta_opmode.changed)
673 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr,
674 &sta_opmode, GFP_KERNEL);
675
676 return changed;
677}
678
679void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
680 struct ieee80211_link_data *link,
681 struct ieee80211_mgmt *mgmt)
682{
683 struct ieee80211_bss_conf *link_conf = link->conf;
684
685 if (!link_conf->mu_mimo_owner)
686 return;
687
688 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
689 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
690 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
691 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
692 return;
693
694 memcpy(link_conf->mu_group.membership,
695 mgmt->u.action.u.vht_group_notif.membership,
696 WLAN_MEMBERSHIP_LEN);
697 memcpy(link_conf->mu_group.position,
698 mgmt->u.action.u.vht_group_notif.position,
699 WLAN_USER_POSITION_LEN);
700
701 ieee80211_link_info_change_notify(sdata, link,
702 BSS_CHANGED_MU_GROUPS);
703}
704
705void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
706 const u8 *membership, const u8 *position)
707{
708 struct ieee80211_bss_conf *link_conf;
709
710 rcu_read_lock();
711 link_conf = rcu_dereference(vif->link_conf[link_id]);
712
713 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) {
714 memcpy(link_conf->mu_group.membership, membership,
715 WLAN_MEMBERSHIP_LEN);
716 memcpy(link_conf->mu_group.position, position,
717 WLAN_USER_POSITION_LEN);
718 }
719 rcu_read_unlock();
720}
721EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
722
723void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
724 struct link_sta_info *link_sta,
725 u8 opmode, enum nl80211_band band)
726{
727 struct ieee80211_local *local = sdata->local;
728 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
729
730 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta,
731 opmode, band);
732
733 if (changed > 0) {
734 ieee80211_recalc_min_chandef(sdata, link_sta->link_id);
735 rate_control_rate_update(local, sband, link_sta->sta,
736 link_sta->link_id, changed);
737 }
738}
739
740void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
741 u16 vht_mask[NL80211_VHT_NSS_MAX])
742{
743 int i;
744 u16 mask, cap = le16_to_cpu(vht_cap);
745
746 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
747 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
748 switch (mask) {
749 case IEEE80211_VHT_MCS_SUPPORT_0_7:
750 vht_mask[i] = 0x00FF;
751 break;
752 case IEEE80211_VHT_MCS_SUPPORT_0_8:
753 vht_mask[i] = 0x01FF;
754 break;
755 case IEEE80211_VHT_MCS_SUPPORT_0_9:
756 vht_mask[i] = 0x03FF;
757 break;
758 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
759 default:
760 vht_mask[i] = 0;
761 break;
762 }
763 }
764}