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
__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 link_sta_info * link_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 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->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
327 break;
328 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
329 link_sta->pub->agg.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->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
334 break;
335 }
336
337 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta);
338 }
339
340 /* FIXME: move this to some better location - parses HE/EHT now */
341 enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cap_rx_bw(struct link_sta_info * link_sta)342 ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta)
343 {
344 unsigned int link_id = link_sta->link_id;
345 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
346 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
347 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
348 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
349 u32 cap_width;
350
351 if (he_cap->has_he) {
352 struct ieee80211_bss_conf *link_conf;
353 enum ieee80211_sta_rx_bandwidth ret;
354 u8 info;
355
356 rcu_read_lock();
357 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
358
359 if (eht_cap->has_eht &&
360 link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
361 info = eht_cap->eht_cap_elem.phy_cap_info[0];
362
363 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
364 ret = IEEE80211_STA_RX_BW_320;
365 goto out;
366 }
367 }
368
369 info = he_cap->he_cap_elem.phy_cap_info[0];
370
371 if (link_conf->chandef.chan->band == NL80211_BAND_2GHZ) {
372 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
373 ret = IEEE80211_STA_RX_BW_40;
374 else
375 ret = IEEE80211_STA_RX_BW_20;
376 goto out;
377 }
378
379 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
380 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
381 ret = IEEE80211_STA_RX_BW_160;
382 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
383 ret = IEEE80211_STA_RX_BW_80;
384 else
385 ret = IEEE80211_STA_RX_BW_20;
386 out:
387 rcu_read_unlock();
388
389 return ret;
390 }
391
392 if (!vht_cap->vht_supported)
393 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
394 IEEE80211_STA_RX_BW_40 :
395 IEEE80211_STA_RX_BW_20;
396
397 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
398
399 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
400 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
401 return IEEE80211_STA_RX_BW_160;
402
403 /*
404 * If this is non-zero, then it does support 160 MHz after all,
405 * in one form or the other. We don't distinguish here (or even
406 * above) between 160 and 80+80 yet.
407 */
408 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
409 return IEEE80211_STA_RX_BW_160;
410
411 return IEEE80211_STA_RX_BW_80;
412 }
413
414 enum nl80211_chan_width
ieee80211_sta_cap_chan_bw(struct link_sta_info * link_sta)415 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
416 {
417 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
418 u32 cap_width;
419
420 if (!vht_cap->vht_supported) {
421 if (!link_sta->pub->ht_cap.ht_supported)
422 return NL80211_CHAN_WIDTH_20_NOHT;
423
424 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
425 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
426 }
427
428 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
429
430 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
431 return NL80211_CHAN_WIDTH_160;
432 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
433 return NL80211_CHAN_WIDTH_80P80;
434
435 return NL80211_CHAN_WIDTH_80;
436 }
437
438 enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info * link_sta)439 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
440 {
441 enum ieee80211_sta_rx_bandwidth cur_bw =
442 link_sta->pub->bandwidth;
443 struct ieee80211_sta_vht_cap *vht_cap =
444 &link_sta->pub->vht_cap;
445 u32 cap_width;
446
447 switch (cur_bw) {
448 case IEEE80211_STA_RX_BW_20:
449 if (!link_sta->pub->ht_cap.ht_supported)
450 return NL80211_CHAN_WIDTH_20_NOHT;
451 else
452 return NL80211_CHAN_WIDTH_20;
453 case IEEE80211_STA_RX_BW_40:
454 return NL80211_CHAN_WIDTH_40;
455 case IEEE80211_STA_RX_BW_80:
456 return NL80211_CHAN_WIDTH_80;
457 case IEEE80211_STA_RX_BW_160:
458 cap_width =
459 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
460
461 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
462 return NL80211_CHAN_WIDTH_160;
463
464 return NL80211_CHAN_WIDTH_80P80;
465 default:
466 return NL80211_CHAN_WIDTH_20;
467 }
468 }
469
470 enum ieee80211_sta_rx_bandwidth
ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)471 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
472 {
473 switch (width) {
474 case NL80211_CHAN_WIDTH_20_NOHT:
475 case NL80211_CHAN_WIDTH_20:
476 return IEEE80211_STA_RX_BW_20;
477 case NL80211_CHAN_WIDTH_40:
478 return IEEE80211_STA_RX_BW_40;
479 case NL80211_CHAN_WIDTH_80:
480 return IEEE80211_STA_RX_BW_80;
481 case NL80211_CHAN_WIDTH_160:
482 case NL80211_CHAN_WIDTH_80P80:
483 return IEEE80211_STA_RX_BW_160;
484 case NL80211_CHAN_WIDTH_320:
485 return IEEE80211_STA_RX_BW_320;
486 default:
487 WARN_ON_ONCE(1);
488 return IEEE80211_STA_RX_BW_20;
489 }
490 }
491
492 /* FIXME: rename/move - this deals with everything not just VHT */
493 enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cur_vht_bw(struct link_sta_info * link_sta)494 ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta)
495 {
496 struct sta_info *sta = link_sta->sta;
497 struct ieee80211_bss_conf *link_conf;
498 enum nl80211_chan_width bss_width;
499 enum ieee80211_sta_rx_bandwidth bw;
500
501 rcu_read_lock();
502 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]);
503 if (WARN_ON(!link_conf))
504 bss_width = NL80211_CHAN_WIDTH_20_NOHT;
505 else
506 bss_width = link_conf->chandef.width;
507 rcu_read_unlock();
508
509 bw = ieee80211_sta_cap_rx_bw(link_sta);
510 bw = min(bw, link_sta->cur_max_bandwidth);
511
512 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
513 * IEEE80211-2016 specification makes higher bandwidth operation
514 * possible on the TDLS link if the peers have wider bandwidth
515 * capability.
516 *
517 * However, in this case, and only if the TDLS peer is authorized,
518 * limit to the tdls_chandef so that the configuration here isn't
519 * wider than what's actually requested on the channel context.
520 */
521 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
522 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) &&
523 test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
524 sta->tdls_chandef.chan)
525 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width));
526 else
527 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
528
529 return bw;
530 }
531
ieee80211_sta_set_rx_nss(struct link_sta_info * link_sta)532 void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta)
533 {
534 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
535 bool support_160;
536
537 /* if we received a notification already don't overwrite it */
538 if (link_sta->pub->rx_nss)
539 return;
540
541 if (link_sta->pub->eht_cap.has_eht) {
542 int i;
543 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
544
545 /* get the max nss for EHT over all possible bandwidths and mcs */
546 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
547 eht_rx_nss = max_t(u8, eht_rx_nss,
548 u8_get_bits(rx_nss_mcs[i],
549 IEEE80211_EHT_MCS_NSS_RX));
550 }
551
552 if (link_sta->pub->he_cap.has_he) {
553 int i;
554 u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
555 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
556 u16 mcs_160_map =
557 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
558 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
559
560 for (i = 7; i >= 0; i--) {
561 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3;
562
563 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
564 rx_mcs_160 = i + 1;
565 break;
566 }
567 }
568 for (i = 7; i >= 0; i--) {
569 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3;
570
571 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
572 rx_mcs_80 = i + 1;
573 break;
574 }
575 }
576
577 support_160 = he_cap->he_cap_elem.phy_cap_info[0] &
578 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
579
580 if (support_160)
581 he_rx_nss = min(rx_mcs_80, rx_mcs_160);
582 else
583 he_rx_nss = rx_mcs_80;
584 }
585
586 if (link_sta->pub->ht_cap.ht_supported) {
587 if (link_sta->pub->ht_cap.mcs.rx_mask[0])
588 ht_rx_nss++;
589 if (link_sta->pub->ht_cap.mcs.rx_mask[1])
590 ht_rx_nss++;
591 if (link_sta->pub->ht_cap.mcs.rx_mask[2])
592 ht_rx_nss++;
593 if (link_sta->pub->ht_cap.mcs.rx_mask[3])
594 ht_rx_nss++;
595 /* FIXME: consider rx_highest? */
596 }
597
598 if (link_sta->pub->vht_cap.vht_supported) {
599 int i;
600 u16 rx_mcs_map;
601
602 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map);
603
604 for (i = 7; i >= 0; i--) {
605 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
606
607 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
608 vht_rx_nss = i + 1;
609 break;
610 }
611 }
612 /* FIXME: consider rx_highest? */
613 }
614
615 rx_nss = max(vht_rx_nss, ht_rx_nss);
616 rx_nss = max(he_rx_nss, rx_nss);
617 rx_nss = max(eht_rx_nss, rx_nss);
618 link_sta->pub->rx_nss = max_t(u8, 1, rx_nss);
619 }
620
__ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct link_sta_info * link_sta,u8 opmode,enum nl80211_band band)621 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
622 struct link_sta_info *link_sta,
623 u8 opmode, enum nl80211_band band)
624 {
625 enum ieee80211_sta_rx_bandwidth new_bw;
626 struct sta_opmode_info sta_opmode = {};
627 u32 changed = 0;
628 u8 nss;
629
630 /* ignore - no support for BF yet */
631 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
632 return 0;
633
634 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
635 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
636 nss += 1;
637
638 if (link_sta->pub->rx_nss != nss) {
639 link_sta->pub->rx_nss = nss;
640 sta_opmode.rx_nss = nss;
641 changed |= IEEE80211_RC_NSS_CHANGED;
642 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
643 }
644
645 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
646 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
647 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
648 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
649 break;
650 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
651 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
652 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
653 break;
654 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
655 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
656 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
657 else
658 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
659 break;
660 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
661 /* legacy only, no longer used by newer spec */
662 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
663 break;
664 }
665
666 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
667 if (new_bw != link_sta->pub->bandwidth) {
668 link_sta->pub->bandwidth = new_bw;
669 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta);
670 changed |= IEEE80211_RC_BW_CHANGED;
671 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
672 }
673
674 if (sta_opmode.changed)
675 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr,
676 &sta_opmode, GFP_KERNEL);
677
678 return changed;
679 }
680
ieee80211_process_mu_groups(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link,struct ieee80211_mgmt * mgmt)681 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
682 struct ieee80211_link_data *link,
683 struct ieee80211_mgmt *mgmt)
684 {
685 struct ieee80211_bss_conf *link_conf = link->conf;
686
687 if (!link_conf->mu_mimo_owner)
688 return;
689
690 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
691 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
692 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
693 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
694 return;
695
696 memcpy(link_conf->mu_group.membership,
697 mgmt->u.action.u.vht_group_notif.membership,
698 WLAN_MEMBERSHIP_LEN);
699 memcpy(link_conf->mu_group.position,
700 mgmt->u.action.u.vht_group_notif.position,
701 WLAN_USER_POSITION_LEN);
702
703 ieee80211_link_info_change_notify(sdata, link,
704 BSS_CHANGED_MU_GROUPS);
705 }
706
ieee80211_update_mu_groups(struct ieee80211_vif * vif,unsigned int link_id,const u8 * membership,const u8 * position)707 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
708 const u8 *membership, const u8 *position)
709 {
710 struct ieee80211_bss_conf *link_conf;
711
712 rcu_read_lock();
713 link_conf = rcu_dereference(vif->link_conf[link_id]);
714
715 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) {
716 memcpy(link_conf->mu_group.membership, membership,
717 WLAN_MEMBERSHIP_LEN);
718 memcpy(link_conf->mu_group.position, position,
719 WLAN_USER_POSITION_LEN);
720 }
721 rcu_read_unlock();
722 }
723 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
724
ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct link_sta_info * link_sta,u8 opmode,enum nl80211_band band)725 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
726 struct link_sta_info *link_sta,
727 u8 opmode, enum nl80211_band band)
728 {
729 struct ieee80211_local *local = sdata->local;
730 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
731
732 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta,
733 opmode, band);
734
735 if (changed > 0) {
736 ieee80211_recalc_min_chandef(sdata, link_sta->link_id);
737 rate_control_rate_update(local, sband, link_sta->sta,
738 link_sta->link_id, changed);
739 }
740 }
741
ieee80211_get_vht_mask_from_cap(__le16 vht_cap,u16 vht_mask[NL80211_VHT_NSS_MAX])742 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
743 u16 vht_mask[NL80211_VHT_NSS_MAX])
744 {
745 int i;
746 u16 mask, cap = le16_to_cpu(vht_cap);
747
748 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
749 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
750 switch (mask) {
751 case IEEE80211_VHT_MCS_SUPPORT_0_7:
752 vht_mask[i] = 0x00FF;
753 break;
754 case IEEE80211_VHT_MCS_SUPPORT_0_8:
755 vht_mask[i] = 0x01FF;
756 break;
757 case IEEE80211_VHT_MCS_SUPPORT_0_9:
758 vht_mask[i] = 0x03FF;
759 break;
760 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
761 default:
762 vht_mask[i] = 0;
763 break;
764 }
765 }
766 }
767