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1/*
2 * VHT handling
3 *
4 * Portions of this file
5 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/ieee80211.h>
13#include <linux/export.h>
14#include <net/mac80211.h>
15#include "ieee80211_i.h"
16#include "rate.h"
17
18
19static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
20 struct ieee80211_sta_vht_cap *vht_cap,
21 u32 flag)
22{
23 __le32 le_flag = cpu_to_le32(flag);
24
25 if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
26 !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
27 vht_cap->cap &= ~flag;
28}
29
30void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
31 struct ieee80211_sta_vht_cap *vht_cap)
32{
33 int i;
34 u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
35
36 if (!vht_cap->vht_supported)
37 return;
38
39 if (sdata->vif.type != NL80211_IFTYPE_STATION)
40 return;
41
42 __check_vhtcap_disable(sdata, vht_cap,
43 IEEE80211_VHT_CAP_RXLDPC);
44 __check_vhtcap_disable(sdata, vht_cap,
45 IEEE80211_VHT_CAP_SHORT_GI_80);
46 __check_vhtcap_disable(sdata, vht_cap,
47 IEEE80211_VHT_CAP_SHORT_GI_160);
48 __check_vhtcap_disable(sdata, vht_cap,
49 IEEE80211_VHT_CAP_TXSTBC);
50 __check_vhtcap_disable(sdata, vht_cap,
51 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
52 __check_vhtcap_disable(sdata, vht_cap,
53 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
54 __check_vhtcap_disable(sdata, vht_cap,
55 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
56 __check_vhtcap_disable(sdata, vht_cap,
57 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
58
59 /* Allow user to decrease AMPDU length exponent */
60 if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
61 cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
62 u32 cap, n;
63
64 n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
65 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
66 n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
67 cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
68 cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
69
70 if (n < cap) {
71 vht_cap->cap &=
72 ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
73 vht_cap->cap |=
74 n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
75 }
76 }
77
78 /* Allow the user to decrease MCSes */
79 rxmcs_mask =
80 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
81 rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
82 rxmcs_n &= rxmcs_mask;
83 rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
84
85 txmcs_mask =
86 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
87 txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
88 txmcs_n &= txmcs_mask;
89 txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
90 for (i = 0; i < 8; i++) {
91 u8 m, n, c;
92
93 m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
94 n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
95 c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
96
97 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
98 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
99 rxmcs_cap &= ~(3 << 2*i);
100 rxmcs_cap |= (rxmcs_n & (3 << 2*i));
101 }
102
103 m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
104 n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
105 c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
106
107 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
108 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
109 txmcs_cap &= ~(3 << 2*i);
110 txmcs_cap |= (txmcs_n & (3 << 2*i));
111 }
112 }
113 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
114 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
115}
116
117void
118ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
119 struct ieee80211_supported_band *sband,
120 const struct ieee80211_vht_cap *vht_cap_ie,
121 struct sta_info *sta)
122{
123 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
124 struct ieee80211_sta_vht_cap own_cap;
125 u32 cap_info, i;
126 bool have_80mhz;
127
128 memset(vht_cap, 0, sizeof(*vht_cap));
129
130 if (!sta->sta.ht_cap.ht_supported)
131 return;
132
133 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
134 return;
135
136 /* Allow VHT if at least one channel on the sband supports 80 MHz */
137 have_80mhz = false;
138 for (i = 0; i < sband->n_channels; i++) {
139 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
140 IEEE80211_CHAN_NO_80MHZ))
141 continue;
142
143 have_80mhz = true;
144 break;
145 }
146
147 if (!have_80mhz)
148 return;
149
150 /*
151 * A VHT STA must support 40 MHz, but if we verify that here
152 * then we break a few things - some APs (e.g. Netgear R6300v2
153 * and others based on the BCM4360 chipset) will unset this
154 * capability bit when operating in 20 MHz.
155 */
156
157 vht_cap->vht_supported = true;
158
159 own_cap = sband->vht_cap;
160 /*
161 * If user has specified capability overrides, take care
162 * of that if the station we're setting up is the AP that
163 * we advertised a restricted capability set to. Override
164 * our own capabilities and then use those below.
165 */
166 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
167 !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
168 ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
169
170 /* take some capabilities as-is */
171 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
172 vht_cap->cap = cap_info;
173 vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
174 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
175 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
176 IEEE80211_VHT_CAP_RXLDPC |
177 IEEE80211_VHT_CAP_VHT_TXOP_PS |
178 IEEE80211_VHT_CAP_HTC_VHT |
179 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
180 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
181 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
182 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
183 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
184
185 /* and some based on our own capabilities */
186 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
187 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
188 vht_cap->cap |= cap_info &
189 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
190 break;
191 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
192 vht_cap->cap |= cap_info &
193 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
194 break;
195 default:
196 /* nothing */
197 break;
198 }
199
200 /* symmetric capabilities */
201 vht_cap->cap |= cap_info & own_cap.cap &
202 (IEEE80211_VHT_CAP_SHORT_GI_80 |
203 IEEE80211_VHT_CAP_SHORT_GI_160);
204
205 /* remaining ones */
206 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
207 vht_cap->cap |= cap_info &
208 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
209 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
210
211 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
212 vht_cap->cap |= cap_info &
213 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
214 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
215
216 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
217 vht_cap->cap |= cap_info &
218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
219
220 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
221 vht_cap->cap |= cap_info &
222 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
223
224 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
225 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
226
227 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
228 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
229
230 /* Copy peer MCS info, the driver might need them. */
231 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
232 sizeof(struct ieee80211_vht_mcs_info));
233
234 /* but also restrict MCSes */
235 for (i = 0; i < 8; i++) {
236 u16 own_rx, own_tx, peer_rx, peer_tx;
237
238 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
239 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
240
241 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
242 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
243
244 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
245 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
246
247 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
248 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
249
250 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
251 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
252 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
253 else if (own_rx < peer_tx)
254 peer_tx = own_rx;
255 }
256
257 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
258 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
259 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
260 else if (own_tx < peer_rx)
261 peer_rx = own_tx;
262 }
263
264 vht_cap->vht_mcs.rx_mcs_map &=
265 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
266 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
267
268 vht_cap->vht_mcs.tx_mcs_map &=
269 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
270 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
271 }
272
273 /*
274 * This is a workaround for VHT-enabled STAs which break the spec
275 * and have the VHT-MCS Rx map filled in with value 3 for all eight
276 * spacial streams, an example is AR9462.
277 *
278 * As per spec, in section 22.1.1 Introduction to the VHT PHY
279 * A VHT STA shall support at least single spactial stream VHT-MCSs
280 * 0 to 7 (transmit and receive) in all supported channel widths.
281 */
282 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
283 vht_cap->vht_supported = false;
284 sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n",
285 sta->addr);
286 return;
287 }
288
289 /* finally set up the bandwidth */
290 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
291 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
292 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
293 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
294 break;
295 default:
296 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
297 }
298
299 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
300
301 /* If HT IE reported 3839 bytes only, stay with that size. */
302 if (sta->sta.max_amsdu_len == IEEE80211_MAX_MPDU_LEN_HT_3839)
303 return;
304
305 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
306 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
307 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
308 break;
309 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
310 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
311 break;
312 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
313 default:
314 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
315 break;
316 }
317}
318
319enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
320{
321 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
322 u32 cap_width;
323
324 if (!vht_cap->vht_supported)
325 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
326 IEEE80211_STA_RX_BW_40 :
327 IEEE80211_STA_RX_BW_20;
328
329 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
330
331 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
332 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
333 return IEEE80211_STA_RX_BW_160;
334
335 return IEEE80211_STA_RX_BW_80;
336}
337
338enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta)
339{
340 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
341 u32 cap_width;
342
343 if (!vht_cap->vht_supported) {
344 if (!sta->sta.ht_cap.ht_supported)
345 return NL80211_CHAN_WIDTH_20_NOHT;
346
347 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
348 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
349 }
350
351 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
352
353 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
354 return NL80211_CHAN_WIDTH_160;
355 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
356 return NL80211_CHAN_WIDTH_80P80;
357
358 return NL80211_CHAN_WIDTH_80;
359}
360
361enum ieee80211_sta_rx_bandwidth
362ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
363{
364 switch (width) {
365 case NL80211_CHAN_WIDTH_20_NOHT:
366 case NL80211_CHAN_WIDTH_20:
367 return IEEE80211_STA_RX_BW_20;
368 case NL80211_CHAN_WIDTH_40:
369 return IEEE80211_STA_RX_BW_40;
370 case NL80211_CHAN_WIDTH_80:
371 return IEEE80211_STA_RX_BW_80;
372 case NL80211_CHAN_WIDTH_160:
373 case NL80211_CHAN_WIDTH_80P80:
374 return IEEE80211_STA_RX_BW_160;
375 default:
376 WARN_ON_ONCE(1);
377 return IEEE80211_STA_RX_BW_20;
378 }
379}
380
381enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
382{
383 struct ieee80211_sub_if_data *sdata = sta->sdata;
384 enum ieee80211_sta_rx_bandwidth bw;
385 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
386
387 bw = ieee80211_sta_cap_rx_bw(sta);
388 bw = min(bw, sta->cur_max_bandwidth);
389 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
390
391 return bw;
392}
393
394void ieee80211_sta_set_rx_nss(struct sta_info *sta)
395{
396 u8 ht_rx_nss = 0, vht_rx_nss = 0;
397
398 /* if we received a notification already don't overwrite it */
399 if (sta->sta.rx_nss)
400 return;
401
402 if (sta->sta.ht_cap.ht_supported) {
403 if (sta->sta.ht_cap.mcs.rx_mask[0])
404 ht_rx_nss++;
405 if (sta->sta.ht_cap.mcs.rx_mask[1])
406 ht_rx_nss++;
407 if (sta->sta.ht_cap.mcs.rx_mask[2])
408 ht_rx_nss++;
409 if (sta->sta.ht_cap.mcs.rx_mask[3])
410 ht_rx_nss++;
411 /* FIXME: consider rx_highest? */
412 }
413
414 if (sta->sta.vht_cap.vht_supported) {
415 int i;
416 u16 rx_mcs_map;
417
418 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
419
420 for (i = 7; i >= 0; i--) {
421 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
422
423 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
424 vht_rx_nss = i + 1;
425 break;
426 }
427 }
428 /* FIXME: consider rx_highest? */
429 }
430
431 ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
432 sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
433}
434
435u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
436 struct sta_info *sta, u8 opmode,
437 enum nl80211_band band)
438{
439 struct ieee80211_local *local = sdata->local;
440 struct ieee80211_supported_band *sband;
441 enum ieee80211_sta_rx_bandwidth new_bw;
442 u32 changed = 0;
443 u8 nss;
444
445 sband = local->hw.wiphy->bands[band];
446
447 /* ignore - no support for BF yet */
448 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
449 return 0;
450
451 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
452 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
453 nss += 1;
454
455 if (sta->sta.rx_nss != nss) {
456 sta->sta.rx_nss = nss;
457 changed |= IEEE80211_RC_NSS_CHANGED;
458 }
459
460 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
461 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
462 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
463 break;
464 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
465 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
466 break;
467 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
468 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
469 break;
470 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
471 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
472 break;
473 }
474
475 new_bw = ieee80211_sta_cur_vht_bw(sta);
476 if (new_bw != sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_bw;
478 changed |= IEEE80211_RC_BW_CHANGED;
479 }
480
481 return changed;
482}
483
484void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
485 struct ieee80211_mgmt *mgmt)
486{
487 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
488
489 if (!sdata->vif.mu_mimo_owner)
490 return;
491
492 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
493 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
494 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
495 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
496 return;
497
498 memcpy(bss_conf->mu_group.membership,
499 mgmt->u.action.u.vht_group_notif.membership,
500 WLAN_MEMBERSHIP_LEN);
501 memcpy(bss_conf->mu_group.position,
502 mgmt->u.action.u.vht_group_notif.position,
503 WLAN_USER_POSITION_LEN);
504
505 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
506}
507
508void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
509 const u8 *membership, const u8 *position)
510{
511 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
512
513 if (WARN_ON_ONCE(!vif->mu_mimo_owner))
514 return;
515
516 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN);
517 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN);
518}
519EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
520
521void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
522 struct sta_info *sta, u8 opmode,
523 enum nl80211_band band)
524{
525 struct ieee80211_local *local = sdata->local;
526 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
527
528 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band);
529
530 if (changed > 0) {
531 ieee80211_recalc_min_chandef(sdata);
532 rate_control_rate_update(local, sband, sta, changed);
533 }
534}
535
536void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
537 u16 vht_mask[NL80211_VHT_NSS_MAX])
538{
539 int i;
540 u16 mask, cap = le16_to_cpu(vht_cap);
541
542 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
543 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
544 switch (mask) {
545 case IEEE80211_VHT_MCS_SUPPORT_0_7:
546 vht_mask[i] = 0x00FF;
547 break;
548 case IEEE80211_VHT_MCS_SUPPORT_0_8:
549 vht_mask[i] = 0x01FF;
550 break;
551 case IEEE80211_VHT_MCS_SUPPORT_0_9:
552 vht_mask[i] = 0x03FF;
553 break;
554 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
555 default:
556 vht_mask[i] = 0;
557 break;
558 }
559 }
560}
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 - 2024 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 const struct ieee80211_vht_cap *vht_cap_ie2,
120 struct link_sta_info *link_sta)
121{
122 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
123 struct ieee80211_sta_vht_cap own_cap;
124 u32 cap_info, i;
125 bool have_80mhz;
126 u32 mpdu_len;
127
128 memset(vht_cap, 0, sizeof(*vht_cap));
129
130 if (!link_sta->pub->ht_cap.ht_supported)
131 return;
132
133 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
134 return;
135
136 /* Allow VHT if at least one channel on the sband supports 80 MHz */
137 have_80mhz = false;
138 for (i = 0; i < sband->n_channels; i++) {
139 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
140 IEEE80211_CHAN_NO_80MHZ))
141 continue;
142
143 have_80mhz = true;
144 break;
145 }
146
147 if (!have_80mhz)
148 return;
149
150 /*
151 * A VHT STA must support 40 MHz, but if we verify that here
152 * then we break a few things - some APs (e.g. Netgear R6300v2
153 * and others based on the BCM4360 chipset) will unset this
154 * capability bit when operating in 20 MHz.
155 */
156
157 vht_cap->vht_supported = true;
158
159 own_cap = sband->vht_cap;
160 /*
161 * If user has specified capability overrides, take care
162 * of that if the station we're setting up is the AP that
163 * we advertised a restricted capability set to. Override
164 * our own capabilities and then use those below.
165 */
166 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
167 !test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER))
168 ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
169
170 /* take some capabilities as-is */
171 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
172 vht_cap->cap = cap_info;
173 vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC |
174 IEEE80211_VHT_CAP_VHT_TXOP_PS |
175 IEEE80211_VHT_CAP_HTC_VHT |
176 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
177 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
178 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
179 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
180 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
181
182 vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK,
183 own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK);
184
185 /* and some based on our own capabilities */
186 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
187 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
188 vht_cap->cap |= cap_info &
189 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
190 break;
191 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
192 vht_cap->cap |= cap_info &
193 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
194 break;
195 default:
196 /* nothing */
197 break;
198 }
199
200 /* symmetric capabilities */
201 vht_cap->cap |= cap_info & own_cap.cap &
202 (IEEE80211_VHT_CAP_SHORT_GI_80 |
203 IEEE80211_VHT_CAP_SHORT_GI_160);
204
205 /* remaining ones */
206 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
207 vht_cap->cap |= cap_info &
208 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
209 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
210
211 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
212 vht_cap->cap |= cap_info &
213 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
214 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
215
216 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
217 vht_cap->cap |= cap_info &
218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
219
220 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
221 vht_cap->cap |= cap_info &
222 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
223
224 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
225 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
226
227 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
228 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
229
230 /* Copy peer MCS info, the driver might need them. */
231 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
232 sizeof(struct ieee80211_vht_mcs_info));
233
234 /* copy EXT_NSS_BW Support value or remove the capability */
235 if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW))
236 vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
237 else
238 vht_cap->vht_mcs.tx_highest &=
239 ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
240
241 /* but also restrict MCSes */
242 for (i = 0; i < 8; i++) {
243 u16 own_rx, own_tx, peer_rx, peer_tx;
244
245 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
246 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
247
248 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
249 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
250
251 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
252 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
253
254 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
255 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
256
257 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
258 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
259 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
260 else if (own_rx < peer_tx)
261 peer_tx = own_rx;
262 }
263
264 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
265 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
266 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
267 else if (own_tx < peer_rx)
268 peer_rx = own_tx;
269 }
270
271 vht_cap->vht_mcs.rx_mcs_map &=
272 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
273 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
274
275 vht_cap->vht_mcs.tx_mcs_map &=
276 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
277 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
278 }
279
280 /*
281 * This is a workaround for VHT-enabled STAs which break the spec
282 * and have the VHT-MCS Rx map filled in with value 3 for all eight
283 * spatial streams, an example is AR9462.
284 *
285 * As per spec, in section 22.1.1 Introduction to the VHT PHY
286 * A VHT STA shall support at least single spatial stream VHT-MCSs
287 * 0 to 7 (transmit and receive) in all supported channel widths.
288 */
289 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
290 vht_cap->vht_supported = false;
291 sdata_info(sdata,
292 "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n",
293 link_sta->sta->addr, link_sta->addr);
294 return;
295 }
296
297 /* finally set up the bandwidth */
298 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
299 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
300 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
301 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
302 break;
303 default:
304 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
305
306 if (!(vht_cap->vht_mcs.tx_highest &
307 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
308 break;
309
310 /*
311 * If this is non-zero, then it does support 160 MHz after all,
312 * in one form or the other. We don't distinguish here (or even
313 * above) between 160 and 80+80 yet.
314 */
315 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
316 link_sta->cur_max_bandwidth =
317 IEEE80211_STA_RX_BW_160;
318 }
319
320 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
321
322 /*
323 * Work around the Cisco 9115 FW 17.3 bug by taking the min of
324 * both reported MPDU lengths.
325 */
326 mpdu_len = vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK;
327 if (vht_cap_ie2)
328 mpdu_len = min_t(u32, mpdu_len,
329 le32_get_bits(vht_cap_ie2->vht_cap_info,
330 IEEE80211_VHT_CAP_MAX_MPDU_MASK));
331
332 /*
333 * FIXME - should the amsdu len be per link? store per link
334 * and maintain a minimum?
335 */
336 switch (mpdu_len) {
337 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
338 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
339 break;
340 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
341 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
342 break;
343 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
344 default:
345 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
346 break;
347 }
348
349 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta);
350}
351
352/* FIXME: move this to some better location - parses HE/EHT now */
353enum ieee80211_sta_rx_bandwidth
354_ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta,
355 struct cfg80211_chan_def *chandef)
356{
357 unsigned int link_id = link_sta->link_id;
358 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
359 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
360 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
361 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
362 u32 cap_width;
363
364 if (he_cap->has_he) {
365 enum nl80211_band band;
366 u8 info;
367
368 if (chandef) {
369 band = chandef->chan->band;
370 } else {
371 struct ieee80211_bss_conf *link_conf;
372
373 rcu_read_lock();
374 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
375 band = link_conf->chanreq.oper.chan->band;
376 rcu_read_unlock();
377 }
378
379 if (eht_cap->has_eht && band == NL80211_BAND_6GHZ) {
380 info = eht_cap->eht_cap_elem.phy_cap_info[0];
381
382 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
383 return IEEE80211_STA_RX_BW_320;
384 }
385
386 info = he_cap->he_cap_elem.phy_cap_info[0];
387
388 if (band == NL80211_BAND_2GHZ) {
389 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
390 return IEEE80211_STA_RX_BW_40;
391 return IEEE80211_STA_RX_BW_20;
392 }
393
394 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
395 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
396 return IEEE80211_STA_RX_BW_160;
397
398 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
399 return IEEE80211_STA_RX_BW_80;
400
401 return IEEE80211_STA_RX_BW_20;
402 }
403
404 if (!vht_cap->vht_supported)
405 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
406 IEEE80211_STA_RX_BW_40 :
407 IEEE80211_STA_RX_BW_20;
408
409 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
410
411 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
412 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
413 return IEEE80211_STA_RX_BW_160;
414
415 /*
416 * If this is non-zero, then it does support 160 MHz after all,
417 * in one form or the other. We don't distinguish here (or even
418 * above) between 160 and 80+80 yet.
419 */
420 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
421 return IEEE80211_STA_RX_BW_160;
422
423 return IEEE80211_STA_RX_BW_80;
424}
425
426enum nl80211_chan_width
427ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
428{
429 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
430 u32 cap_width;
431
432 if (!vht_cap->vht_supported) {
433 if (!link_sta->pub->ht_cap.ht_supported)
434 return NL80211_CHAN_WIDTH_20_NOHT;
435
436 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
437 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
438 }
439
440 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
441
442 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
443 return NL80211_CHAN_WIDTH_160;
444 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
445 return NL80211_CHAN_WIDTH_80P80;
446
447 return NL80211_CHAN_WIDTH_80;
448}
449
450enum nl80211_chan_width
451ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
452{
453 enum ieee80211_sta_rx_bandwidth cur_bw =
454 link_sta->pub->bandwidth;
455 struct ieee80211_sta_vht_cap *vht_cap =
456 &link_sta->pub->vht_cap;
457 u32 cap_width;
458
459 switch (cur_bw) {
460 case IEEE80211_STA_RX_BW_20:
461 if (!link_sta->pub->ht_cap.ht_supported)
462 return NL80211_CHAN_WIDTH_20_NOHT;
463 else
464 return NL80211_CHAN_WIDTH_20;
465 case IEEE80211_STA_RX_BW_40:
466 return NL80211_CHAN_WIDTH_40;
467 case IEEE80211_STA_RX_BW_80:
468 return NL80211_CHAN_WIDTH_80;
469 case IEEE80211_STA_RX_BW_160:
470 cap_width =
471 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
472
473 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
474 return NL80211_CHAN_WIDTH_160;
475
476 return NL80211_CHAN_WIDTH_80P80;
477 default:
478 return NL80211_CHAN_WIDTH_20;
479 }
480}
481
482/* FIXME: rename/move - this deals with everything not just VHT */
483enum ieee80211_sta_rx_bandwidth
484_ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta,
485 struct cfg80211_chan_def *chandef)
486{
487 struct sta_info *sta = link_sta->sta;
488 enum nl80211_chan_width bss_width;
489 enum ieee80211_sta_rx_bandwidth bw;
490
491 if (chandef) {
492 bss_width = chandef->width;
493 } else {
494 struct ieee80211_bss_conf *link_conf;
495
496 rcu_read_lock();
497 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]);
498 if (WARN_ON_ONCE(!link_conf)) {
499 rcu_read_unlock();
500 return IEEE80211_STA_RX_BW_20;
501 }
502 bss_width = link_conf->chanreq.oper.width;
503 rcu_read_unlock();
504 }
505
506 bw = _ieee80211_sta_cap_rx_bw(link_sta, chandef);
507 bw = min(bw, link_sta->cur_max_bandwidth);
508
509 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
510 * IEEE80211-2016 specification makes higher bandwidth operation
511 * possible on the TDLS link if the peers have wider bandwidth
512 * capability.
513 *
514 * However, in this case, and only if the TDLS peer is authorized,
515 * limit to the tdls_chandef so that the configuration here isn't
516 * wider than what's actually requested on the channel context.
517 */
518 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
519 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) &&
520 test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
521 sta->tdls_chandef.chan)
522 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width));
523 else
524 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
525
526 return bw;
527}
528
529void ieee80211_sta_init_nss(struct link_sta_info *link_sta)
530{
531 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
532 bool support_160;
533
534 if (link_sta->pub->eht_cap.has_eht) {
535 int i;
536 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
537
538 /* get the max nss for EHT over all possible bandwidths and mcs */
539 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
540 eht_rx_nss = max_t(u8, eht_rx_nss,
541 u8_get_bits(rx_nss_mcs[i],
542 IEEE80211_EHT_MCS_NSS_RX));
543 }
544
545 if (link_sta->pub->he_cap.has_he) {
546 int i;
547 u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
548 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
549 u16 mcs_160_map =
550 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
551 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
552
553 for (i = 7; i >= 0; i--) {
554 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3;
555
556 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
557 rx_mcs_160 = i + 1;
558 break;
559 }
560 }
561 for (i = 7; i >= 0; i--) {
562 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3;
563
564 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
565 rx_mcs_80 = i + 1;
566 break;
567 }
568 }
569
570 support_160 = he_cap->he_cap_elem.phy_cap_info[0] &
571 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
572
573 if (support_160)
574 he_rx_nss = min(rx_mcs_80, rx_mcs_160);
575 else
576 he_rx_nss = rx_mcs_80;
577 }
578
579 if (link_sta->pub->ht_cap.ht_supported) {
580 if (link_sta->pub->ht_cap.mcs.rx_mask[0])
581 ht_rx_nss++;
582 if (link_sta->pub->ht_cap.mcs.rx_mask[1])
583 ht_rx_nss++;
584 if (link_sta->pub->ht_cap.mcs.rx_mask[2])
585 ht_rx_nss++;
586 if (link_sta->pub->ht_cap.mcs.rx_mask[3])
587 ht_rx_nss++;
588 /* FIXME: consider rx_highest? */
589 }
590
591 if (link_sta->pub->vht_cap.vht_supported) {
592 int i;
593 u16 rx_mcs_map;
594
595 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map);
596
597 for (i = 7; i >= 0; i--) {
598 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
599
600 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
601 vht_rx_nss = i + 1;
602 break;
603 }
604 }
605 /* FIXME: consider rx_highest? */
606 }
607
608 rx_nss = max(vht_rx_nss, ht_rx_nss);
609 rx_nss = max(he_rx_nss, rx_nss);
610 rx_nss = max(eht_rx_nss, rx_nss);
611 rx_nss = max_t(u8, 1, rx_nss);
612 link_sta->capa_nss = rx_nss;
613
614 /* that shouldn't be set yet, but we can handle it anyway */
615 if (link_sta->op_mode_nss)
616 link_sta->pub->rx_nss =
617 min_t(u8, rx_nss, link_sta->op_mode_nss);
618 else
619 link_sta->pub->rx_nss = rx_nss;
620}
621
622u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
623 struct link_sta_info *link_sta,
624 u8 opmode, enum nl80211_band band)
625{
626 enum ieee80211_sta_rx_bandwidth new_bw;
627 struct sta_opmode_info sta_opmode = {};
628 u32 changed = 0;
629 u8 nss;
630
631 /* ignore - no support for BF yet */
632 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
633 return 0;
634
635 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
636 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
637 nss += 1;
638
639 if (link_sta->op_mode_nss != nss) {
640 if (nss <= link_sta->capa_nss) {
641 link_sta->op_mode_nss = nss;
642
643 if (nss != link_sta->pub->rx_nss) {
644 link_sta->pub->rx_nss = nss;
645 changed |= IEEE80211_RC_NSS_CHANGED;
646 sta_opmode.rx_nss = link_sta->pub->rx_nss;
647 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
648 }
649 } else {
650 pr_warn_ratelimited("Ignoring NSS change in VHT Operating Mode Notification from %pM with invalid nss %d",
651 link_sta->pub->addr, nss);
652 }
653 }
654
655 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
656 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
657 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
658 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
659 break;
660 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
661 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
662 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
663 break;
664 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
665 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
666 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
667 else
668 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
669 break;
670 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
671 /* legacy only, no longer used by newer spec */
672 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
673 break;
674 }
675
676 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
677 if (new_bw != link_sta->pub->bandwidth) {
678 link_sta->pub->bandwidth = new_bw;
679 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta);
680 changed |= IEEE80211_RC_BW_CHANGED;
681 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
682 }
683
684 if (sta_opmode.changed)
685 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr,
686 &sta_opmode, GFP_KERNEL);
687
688 return changed;
689}
690
691void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
692 struct ieee80211_link_data *link,
693 struct ieee80211_mgmt *mgmt)
694{
695 struct ieee80211_bss_conf *link_conf = link->conf;
696
697 if (!link_conf->mu_mimo_owner)
698 return;
699
700 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
701 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
702 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
703 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
704 return;
705
706 memcpy(link_conf->mu_group.membership,
707 mgmt->u.action.u.vht_group_notif.membership,
708 WLAN_MEMBERSHIP_LEN);
709 memcpy(link_conf->mu_group.position,
710 mgmt->u.action.u.vht_group_notif.position,
711 WLAN_USER_POSITION_LEN);
712
713 ieee80211_link_info_change_notify(sdata, link,
714 BSS_CHANGED_MU_GROUPS);
715}
716
717void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
718 const u8 *membership, const u8 *position)
719{
720 struct ieee80211_bss_conf *link_conf;
721
722 rcu_read_lock();
723 link_conf = rcu_dereference(vif->link_conf[link_id]);
724
725 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) {
726 memcpy(link_conf->mu_group.membership, membership,
727 WLAN_MEMBERSHIP_LEN);
728 memcpy(link_conf->mu_group.position, position,
729 WLAN_USER_POSITION_LEN);
730 }
731 rcu_read_unlock();
732}
733EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
734
735void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
736 struct link_sta_info *link_sta,
737 u8 opmode, enum nl80211_band band)
738{
739 struct ieee80211_local *local = sdata->local;
740 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
741
742 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta,
743 opmode, band);
744
745 if (changed > 0) {
746 ieee80211_recalc_min_chandef(sdata, link_sta->link_id);
747 rate_control_rate_update(local, sband, link_sta, changed);
748 }
749}
750
751void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
752 u16 vht_mask[NL80211_VHT_NSS_MAX])
753{
754 int i;
755 u16 mask, cap = le16_to_cpu(vht_cap);
756
757 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
758 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
759 switch (mask) {
760 case IEEE80211_VHT_MCS_SUPPORT_0_7:
761 vht_mask[i] = 0x00FF;
762 break;
763 case IEEE80211_VHT_MCS_SUPPORT_0_8:
764 vht_mask[i] = 0x01FF;
765 break;
766 case IEEE80211_VHT_MCS_SUPPORT_0_9:
767 vht_mask[i] = 0x03FF;
768 break;
769 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
770 default:
771 vht_mask[i] = 0;
772 break;
773 }
774 }
775}