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Merge tag 'for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen19...
[linux-block.git] / net / mac80211 / vht.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
818255ea
MP		 2/*
3 * VHT handling
4 *
23a1f8d4 5 * Portions of this file
65554d07 6 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
d0a9123e 7 * Copyright (C) 2018 - 2022 Intel Corporation
818255ea
MP		 8 */
9
10#include <linux/ieee80211.h>
11#include <linux/export.h>
12#include <net/mac80211.h>
13#include "ieee80211_i.h"
0af83d3d 14#include "rate.h"
818255ea
MP		 15
16
dd5ecfea
JB		 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
4a3cb702
JB		 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,
c71420db 119 struct link_sta_info *link_sta)
818255ea 120{
c71420db 121 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
55d942f4
JB		 122 struct ieee80211_sta_vht_cap own_cap;
123 u32 cap_info, i;
52a45f38 124 bool have_80mhz;
818255ea
MP		 125
126 memset(vht_cap, 0, sizeof(*vht_cap));
127
c71420db 128 if (!link_sta->pub->ht_cap.ht_supported)
4a34215e
JB		 129 return;
130
818255ea
MP		 131 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
132 return;
133
52a45f38
AN		 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
4a817aa7
JB		 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 */
e1a0c6b3 154
818255ea
MP		 155 vht_cap->vht_supported = true;
156
55d942f4
JB		 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 &&
c71420db 165 !test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER))
55d942f4
JB		 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;
3bd5c7a2 171 vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC |
55d942f4
JB		 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
3bd5c7a2
FF		 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
55d942f4
JB		 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 */
fbdd90ea 204 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
55d942f4
JB		 205 vht_cap->cap |= cap_info &
206 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
fbdd90ea 207 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
55d942f4
JB		 208
209 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
210 vht_cap->cap |= cap_info &
5eb7906b 211 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
fbdd90ea 212 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
55d942f4
JB		 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;
818255ea
MP		 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));
e1a0c6b3 231
e80d6425
JB		 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
55d942f4
JB		 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
c8eaf347
FM		 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;
c71420db
JB		 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);
c8eaf347
FM		 292 return;
293 }
294
55d942f4 295 /* finally set up the bandwidth */
0af83d3d
JB		 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:
c71420db 299 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
0af83d3d
JB		 300 break;
301 default:
c71420db 302 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
e80d6425
JB		 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)
c71420db 314 link_sta->cur_max_bandwidth =
afe0d181 315 IEEE80211_STA_RX_BW_160;
0af83d3d
JB		 316 }
317
c71420db 318 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
506bcfa8 319
c71420db
JB		 320 /*
321 * FIXME - should the amsdu len be per link? store per link
322 * and maintain a minimum?
323 */
506bcfa8
EG		 324 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
325 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
4c51541d 326 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
506bcfa8
EG		 327 break;
328 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
4c51541d 329 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
506bcfa8
EG		 330 break;
331 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
332 default:
4c51541d 333 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
506bcfa8
EG		 334 break;
335 }
4c51541d
BB		 336
337 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta);
e1a0c6b3
JB		 338}
339
a1de6407 340/* FIXME: move this to some better location - parses HE/EHT now */
c71420db
JB		 341enum ieee80211_sta_rx_bandwidth
342ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta)
e1a0c6b3 343{
c71420db
JB		 344 unsigned int link_id = link_sta->link_id;
345 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
c71420db
JB		 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;
1c45c5ce 349 u32 cap_width;
e1a0c6b3 350
cf2c9cc3 351 if (he_cap->has_he) {
d8675a63
JB		 352 struct ieee80211_bss_conf *link_conf;
353 enum ieee80211_sta_rx_bandwidth ret;
a1de6407
IP		 354 u8 info;
355
d8675a63
JB		 356 rcu_read_lock();
357 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
358
a1de6407 359 if (eht_cap->has_eht &&
b4f85443 360 link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
a1de6407
IP		 361 info = eht_cap->eht_cap_elem.phy_cap_info[0];
362
d8675a63
JB		 363 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
364 ret = IEEE80211_STA_RX_BW_320;
365 goto out;
366 }
a1de6407
IP		 367 }
368
369 info = he_cap->he_cap_elem.phy_cap_info[0];
cf2c9cc3 370
b4f85443 371 if (link_conf->chandef.chan->band == NL80211_BAND_2GHZ) {
cf2c9cc3 372 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
d8675a63 373 ret = IEEE80211_STA_RX_BW_40;
cf2c9cc3 374 else
d8675a63
JB		 375 ret = IEEE80211_STA_RX_BW_20;
376 goto out;
cf2c9cc3
JB		 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)
d8675a63 381 ret = IEEE80211_STA_RX_BW_160;
cf2c9cc3 382 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
d8675a63
JB		 383 ret = IEEE80211_STA_RX_BW_80;
384 else
385 ret = IEEE80211_STA_RX_BW_20;
386out:
387 rcu_read_unlock();
cf2c9cc3 388
d8675a63 389 return ret;
cf2c9cc3
JB		 390 }
391
1c45c5ce 392 if (!vht_cap->vht_supported)
c71420db 393 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
1c45c5ce
EP		 394 IEEE80211_STA_RX_BW_40 :
395 IEEE80211_STA_RX_BW_20;
e1a0c6b3 396
1c45c5ce
EP		 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
e5c0b0ff
MG		 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
1c45c5ce
EP		 411 return IEEE80211_STA_RX_BW_80;
412}
413
c71420db
JB		 414enum nl80211_chan_width
415ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
59021c67 416{
c71420db 417 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
59021c67
AN		 418 u32 cap_width;
419
420 if (!vht_cap->vht_supported) {
c71420db 421 if (!link_sta->pub->ht_cap.ht_supported)
59021c67
AN		 422 return NL80211_CHAN_WIDTH_20_NOHT;
423
c71420db 424 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
59021c67
AN		 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
97f5f425 438enum nl80211_chan_width
c71420db 439ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
97f5f425 440{
afe0d181 441 enum ieee80211_sta_rx_bandwidth cur_bw =
c71420db 442 link_sta->pub->bandwidth;
afe0d181 443 struct ieee80211_sta_vht_cap *vht_cap =
c71420db 444 &link_sta->pub->vht_cap;
97f5f425 445 u32 cap_width;
446
447 switch (cur_bw) {
448 case IEEE80211_STA_RX_BW_20:
c71420db 449 if (!link_sta->pub->ht_cap.ht_supported)
97f5f425 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
59021c67 470enum ieee80211_sta_rx_bandwidth
1c45c5ce
EP		 471ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
472{
473 switch (width) {
e1a0c6b3
JB		 474 case NL80211_CHAN_WIDTH_20_NOHT:
475 case NL80211_CHAN_WIDTH_20:
1c45c5ce 476 return IEEE80211_STA_RX_BW_20;
e1a0c6b3 477 case NL80211_CHAN_WIDTH_40:
1c45c5ce
EP		 478 return IEEE80211_STA_RX_BW_40;
479 case NL80211_CHAN_WIDTH_80:
480 return IEEE80211_STA_RX_BW_80;
e1a0c6b3 481 case NL80211_CHAN_WIDTH_160:
e1a0c6b3 482 case NL80211_CHAN_WIDTH_80P80:
1c45c5ce 483 return IEEE80211_STA_RX_BW_160;
5dca295d
IP		 484 case NL80211_CHAN_WIDTH_320:
485 return IEEE80211_STA_RX_BW_320;
1c45c5ce
EP		 486 default:
487 WARN_ON_ONCE(1);
488 return IEEE80211_STA_RX_BW_20;
e1a0c6b3 489 }
1c45c5ce
EP		 490}
491
cf2c9cc3 492/* FIXME: rename/move - this deals with everything not just VHT */
c71420db
JB		 493enum ieee80211_sta_rx_bandwidth
494ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta)
1c45c5ce 495{
c71420db 496 struct sta_info *sta = link_sta->sta;
d8675a63
JB		 497 struct ieee80211_bss_conf *link_conf;
498 enum nl80211_chan_width bss_width;
1c45c5ce
EP		 499 enum ieee80211_sta_rx_bandwidth bw;
500
d8675a63
JB		 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
c71420db
JB		 509 bw = ieee80211_sta_cap_rx_bw(link_sta);
510 bw = min(bw, link_sta->cur_max_bandwidth);
504871e6
MP		 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.
f65607cd
JB		 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.
504871e6
MP		 520 */
521 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
f65607cd
JB		 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));
b98fb44f 528
0af83d3d 529 return bw;
818255ea 530}
8921d04e 531
c71420db 532void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta)
8921d04e 533{
443df9a7 534 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
2d5e09d0 535 bool support_160;
8921d04e
JB		 536
537 /* if we received a notification already don't overwrite it */
c71420db 538 if (link_sta->pub->rx_nss)
8921d04e
JB		 539 return;
540
c71420db 541 if (link_sta->pub->eht_cap.has_eht) {
443df9a7 542 int i;
c71420db 543 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
443df9a7
MG		 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
c71420db 552 if (link_sta->pub->he_cap.has_he) {
f46209b9
TM		 553 int i;
554 u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
c71420db 555 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
f46209b9
TM		 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
abd5a8e5 563 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
f46209b9
TM		 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
abd5a8e5 571 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
f46209b9
TM		 572 rx_mcs_80 = i + 1;
573 break;
574 }
575 }
576
2d5e09d0
WG		 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;
f46209b9
TM		 584 }
585
c71420db
JB		 586 if (link_sta->pub->ht_cap.ht_supported) {
587 if (link_sta->pub->ht_cap.mcs.rx_mask[0])
8921d04e 588 ht_rx_nss++;
c71420db 589 if (link_sta->pub->ht_cap.mcs.rx_mask[1])
8921d04e 590 ht_rx_nss++;
c71420db 591 if (link_sta->pub->ht_cap.mcs.rx_mask[2])
8921d04e 592 ht_rx_nss++;
c71420db 593 if (link_sta->pub->ht_cap.mcs.rx_mask[3])
8921d04e
JB		 594 ht_rx_nss++;
595 /* FIXME: consider rx_highest? */
596 }
597
c71420db 598 if (link_sta->pub->vht_cap.vht_supported) {
8921d04e
JB		 599 int i;
600 u16 rx_mcs_map;
601
c71420db 602 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map);
8921d04e
JB		 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
f46209b9
TM		 615 rx_nss = max(vht_rx_nss, ht_rx_nss);
616 rx_nss = max(he_rx_nss, rx_nss);
443df9a7 617 rx_nss = max(eht_rx_nss, rx_nss);
c71420db 618 link_sta->pub->rx_nss = max_t(u8, 1, rx_nss);
8921d04e 619}
0af83d3d 620
b1bce14a 621u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
c71420db 622 struct link_sta_info *link_sta,
afe0d181 623 u8 opmode, enum nl80211_band band)
0af83d3d 624{
0af83d3d 625 enum ieee80211_sta_rx_bandwidth new_bw;
ff84e7bf 626 struct sta_opmode_info sta_opmode = {};
0af83d3d 627 u32 changed = 0;
57b341e9 628 u8 nss, cur_nss;
0af83d3d 629
0af83d3d
JB		 630 /* ignore - no support for BF yet */
631 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
b1bce14a 632 return 0;
0af83d3d
JB		 633
634 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
635 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
636 nss += 1;
637
c71420db 638 if (link_sta->pub->rx_nss != nss) {
57b341e9
RS		 639 cur_nss = link_sta->pub->rx_nss;
640 /* Reset rx_nss and call ieee80211_sta_set_rx_nss() which
641 * will set the same to max nss value calculated based on capability.
642 */
643 link_sta->pub->rx_nss = 0;
644 ieee80211_sta_set_rx_nss(link_sta);
645 /* Do not allow an nss change to rx_nss greater than max_nss
646 * negotiated and capped to APs capability during association.
647 */
648 if (nss <= link_sta->pub->rx_nss) {
649 link_sta->pub->rx_nss = nss;
650 sta_opmode.rx_nss = nss;
651 changed |= IEEE80211_RC_NSS_CHANGED;
652 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
653 } else {
654 link_sta->pub->rx_nss = cur_nss;
655 pr_warn_ratelimited("Ignoring NSS change in VHT Operating Mode Notification from %pM with invalid nss %d",
656 link_sta->pub->addr, nss);
657 }
0af83d3d
JB		 658 }
659
660 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
661 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
9166cc49 662 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
c71420db 663 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
0af83d3d
JB		 664 break;
665 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
9166cc49 666 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
c71420db 667 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
0af83d3d
JB		 668 break;
669 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
9166cc49 670 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
c71420db 671 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
9166cc49 672 else
c71420db 673 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
0af83d3d
JB		 674 break;
675 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
9166cc49 676 /* legacy only, no longer used by newer spec */
c71420db 677 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
0af83d3d
JB		 678 break;
679 }
680
c71420db
JB		 681 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
682 if (new_bw != link_sta->pub->bandwidth) {
683 link_sta->pub->bandwidth = new_bw;
684 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta);
38745c74 685 changed |= IEEE80211_RC_BW_CHANGED;
ff84e7bf 686 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
0af83d3d
JB		 687 }
688
ff84e7bf 689 if (sta_opmode.changed)
c71420db 690 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr,
ff84e7bf 691 &sta_opmode, GFP_KERNEL);
692
b1bce14a
MK		 693 return changed;
694}
695
23a1f8d4 696void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
d8675a63 697 struct ieee80211_link_data *link,
23a1f8d4
SS		 698 struct ieee80211_mgmt *mgmt)
699{
d8675a63 700 struct ieee80211_bss_conf *link_conf = link->conf;
23a1f8d4 701
afe0d181 702 if (!link_conf->mu_mimo_owner)
23a1f8d4
SS		 703 return;
704
705 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
afe0d181 706 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
23a1f8d4 707 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
afe0d181 708 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
23a1f8d4
SS		 709 return;
710
afe0d181 711 memcpy(link_conf->mu_group.membership,
0241fa19
SS		 712 mgmt->u.action.u.vht_group_notif.membership,
713 WLAN_MEMBERSHIP_LEN);
afe0d181 714 memcpy(link_conf->mu_group.position,
0241fa19
SS		 715 mgmt->u.action.u.vht_group_notif.position,
716 WLAN_USER_POSITION_LEN);
23a1f8d4 717
d8675a63
JB		 718 ieee80211_link_info_change_notify(sdata, link,
719 BSS_CHANGED_MU_GROUPS);
23a1f8d4
SS		 720}
721
afe0d181 722void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
65554d07
SS		 723 const u8 *membership, const u8 *position)
724{
d8675a63 725 struct ieee80211_bss_conf *link_conf;
65554d07 726
d8675a63
JB		 727 rcu_read_lock();
728 link_conf = rcu_dereference(vif->link_conf[link_id]);
65554d07 729
d8675a63
JB		 730 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) {
731 memcpy(link_conf->mu_group.membership, membership,
732 WLAN_MEMBERSHIP_LEN);
733 memcpy(link_conf->mu_group.position, position,
734 WLAN_USER_POSITION_LEN);
735 }
736 rcu_read_unlock();
65554d07
SS		 737}
738EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
739
b1bce14a 740void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
c71420db 741 struct link_sta_info *link_sta,
afe0d181 742 u8 opmode, enum nl80211_band band)
b1bce14a
MK		 743{
744 struct ieee80211_local *local = sdata->local;
745 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
746
c71420db 747 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta,
afe0d181 748 opmode, band);
b1bce14a 749
d2941df8 750 if (changed > 0) {
0cbf348a 751 ieee80211_recalc_min_chandef(sdata, link_sta->link_id);
c71420db
JB		 752 rate_control_rate_update(local, sband, link_sta->sta,
753 link_sta->link_id, changed);
d2941df8 754 }
0af83d3d 755}
b119ad6e
LB		 756
757void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
758 u16 vht_mask[NL80211_VHT_NSS_MAX])
759{
760 int i;
761 u16 mask, cap = le16_to_cpu(vht_cap);
762
763 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
764 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
765 switch (mask) {
766 case IEEE80211_VHT_MCS_SUPPORT_0_7:
767 vht_mask[i] = 0x00FF;
768 break;
769 case IEEE80211_VHT_MCS_SUPPORT_0_8:
770 vht_mask[i] = 0x01FF;
771 break;
772 case IEEE80211_VHT_MCS_SUPPORT_0_9:
773 vht_mask[i] = 0x03FF;
774 break;
775 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
776 default:
777 vht_mask[i] = 0;
778 break;
779 }
780 }
781}
Linux 6.x block layer and io_uring tree(s)