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 - 2019 Intel Corporation
8 */
9
10 #include <linux/ieee80211.h>
11 #include <linux/export.h>
12 #include <net/mac80211.h>
13 #include "ieee80211_i.h"
14 #include "rate.h"
15
16
__check_vhtcap_disable(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap,u32 flag)17 static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
18 struct ieee80211_sta_vht_cap *vht_cap,
19 u32 flag)
20 {
21 __le32 le_flag = cpu_to_le32(flag);
22
23 if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
24 !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
25 vht_cap->cap &= ~flag;
26 }
27
ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap)28 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
29 struct ieee80211_sta_vht_cap *vht_cap)
30 {
31 int i;
32 u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
33
34 if (!vht_cap->vht_supported)
35 return;
36
37 if (sdata->vif.type != NL80211_IFTYPE_STATION)
38 return;
39
40 __check_vhtcap_disable(sdata, vht_cap,
41 IEEE80211_VHT_CAP_RXLDPC);
42 __check_vhtcap_disable(sdata, vht_cap,
43 IEEE80211_VHT_CAP_SHORT_GI_80);
44 __check_vhtcap_disable(sdata, vht_cap,
45 IEEE80211_VHT_CAP_SHORT_GI_160);
46 __check_vhtcap_disable(sdata, vht_cap,
47 IEEE80211_VHT_CAP_TXSTBC);
48 __check_vhtcap_disable(sdata, vht_cap,
49 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
50 __check_vhtcap_disable(sdata, vht_cap,
51 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
52 __check_vhtcap_disable(sdata, vht_cap,
53 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
54 __check_vhtcap_disable(sdata, vht_cap,
55 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
56
57 /* Allow user to decrease AMPDU length exponent */
58 if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
59 cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
60 u32 cap, n;
61
62 n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
63 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
64 n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
65 cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
66 cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
67
68 if (n < cap) {
69 vht_cap->cap &=
70 ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
71 vht_cap->cap |=
72 n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
73 }
74 }
75
76 /* Allow the user to decrease MCSes */
77 rxmcs_mask =
78 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
79 rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
80 rxmcs_n &= rxmcs_mask;
81 rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
82
83 txmcs_mask =
84 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
85 txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
86 txmcs_n &= txmcs_mask;
87 txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
88 for (i = 0; i < 8; i++) {
89 u8 m, n, c;
90
91 m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
92 n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
93 c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
94
95 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
96 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
97 rxmcs_cap &= ~(3 << 2*i);
98 rxmcs_cap |= (rxmcs_n & (3 << 2*i));
99 }
100
101 m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
102 n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
103 c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
104
105 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
106 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
107 txmcs_cap &= ~(3 << 2*i);
108 txmcs_cap |= (txmcs_n & (3 << 2*i));
109 }
110 }
111 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
112 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
113 }
114
115 void
ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_vht_cap * vht_cap_ie,struct sta_info * sta)116 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
117 struct ieee80211_supported_band *sband,
118 const struct ieee80211_vht_cap *vht_cap_ie,
119 struct sta_info *sta)
120 {
121 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
122 struct ieee80211_sta_vht_cap own_cap;
123 u32 cap_info, i;
124 bool have_80mhz;
125
126 memset(vht_cap, 0, sizeof(*vht_cap));
127
128 if (!sta->sta.ht_cap.ht_supported)
129 return;
130
131 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
132 return;
133
134 /* Allow VHT if at least one channel on the sband supports 80 MHz */
135 have_80mhz = false;
136 for (i = 0; i < sband->n_channels; i++) {
137 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
138 IEEE80211_CHAN_NO_80MHZ))
139 continue;
140
141 have_80mhz = true;
142 break;
143 }
144
145 if (!have_80mhz)
146 return;
147
148 /*
149 * A VHT STA must support 40 MHz, but if we verify that here
150 * then we break a few things - some APs (e.g. Netgear R6300v2
151 * and others based on the BCM4360 chipset) will unset this
152 * capability bit when operating in 20 MHz.
153 */
154
155 vht_cap->vht_supported = true;
156
157 own_cap = sband->vht_cap;
158 /*
159 * If user has specified capability overrides, take care
160 * of that if the station we're setting up is the AP that
161 * we advertised a restricted capability set to. Override
162 * our own capabilities and then use those below.
163 */
164 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
165 !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
166 ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
167
168 /* take some capabilities as-is */
169 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
170 vht_cap->cap = cap_info;
171 vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
172 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
173 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
174 IEEE80211_VHT_CAP_RXLDPC |
175 IEEE80211_VHT_CAP_VHT_TXOP_PS |
176 IEEE80211_VHT_CAP_HTC_VHT |
177 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
178 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
179 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
180 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
181 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
182
183 /* and some based on our own capabilities */
184 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
185 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
186 vht_cap->cap |= cap_info &
187 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
188 break;
189 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
190 vht_cap->cap |= cap_info &
191 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
192 break;
193 default:
194 /* nothing */
195 break;
196 }
197
198 /* symmetric capabilities */
199 vht_cap->cap |= cap_info & own_cap.cap &
200 (IEEE80211_VHT_CAP_SHORT_GI_80 |
201 IEEE80211_VHT_CAP_SHORT_GI_160);
202
203 /* remaining ones */
204 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
205 vht_cap->cap |= cap_info &
206 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
207 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
208
209 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
210 vht_cap->cap |= cap_info &
211 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
212 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
213
214 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
215 vht_cap->cap |= cap_info &
216 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
217
218 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
219 vht_cap->cap |= cap_info &
220 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
221
222 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
223 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
224
225 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
226 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
227
228 /* Copy peer MCS info, the driver might need them. */
229 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
230 sizeof(struct ieee80211_vht_mcs_info));
231
232 /* copy EXT_NSS_BW Support value or remove the capability */
233 if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW))
234 vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
235 else
236 vht_cap->vht_mcs.tx_highest &=
237 ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
238
239 /* but also restrict MCSes */
240 for (i = 0; i < 8; i++) {
241 u16 own_rx, own_tx, peer_rx, peer_tx;
242
243 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
244 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
245
246 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
247 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
248
249 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
250 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
251
252 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
253 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
254
255 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
256 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
257 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
258 else if (own_rx < peer_tx)
259 peer_tx = own_rx;
260 }
261
262 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
263 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
264 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
265 else if (own_tx < peer_rx)
266 peer_rx = own_tx;
267 }
268
269 vht_cap->vht_mcs.rx_mcs_map &=
270 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
271 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
272
273 vht_cap->vht_mcs.tx_mcs_map &=
274 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
275 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
276 }
277
278 /*
279 * This is a workaround for VHT-enabled STAs which break the spec
280 * and have the VHT-MCS Rx map filled in with value 3 for all eight
281 * spacial streams, an example is AR9462.
282 *
283 * As per spec, in section 22.1.1 Introduction to the VHT PHY
284 * A VHT STA shall support at least single spactial stream VHT-MCSs
285 * 0 to 7 (transmit and receive) in all supported channel widths.
286 */
287 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
288 vht_cap->vht_supported = false;
289 sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n",
290 sta->addr);
291 return;
292 }
293
294 /* finally set up the bandwidth */
295 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
296 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
297 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
298 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
299 break;
300 default:
301 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
302
303 if (!(vht_cap->vht_mcs.tx_highest &
304 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
305 break;
306
307 /*
308 * If this is non-zero, then it does support 160 MHz after all,
309 * in one form or the other. We don't distinguish here (or even
310 * above) between 160 and 80+80 yet.
311 */
312 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
313 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
314 }
315
316 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
317
318 /* If HT IE reported 3839 bytes only, stay with that size. */
319 if (sta->sta.max_amsdu_len == IEEE80211_MAX_MPDU_LEN_HT_3839)
320 return;
321
322 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
323 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
324 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
325 break;
326 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
327 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
328 break;
329 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
330 default:
331 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
332 break;
333 }
334 }
335
ieee80211_sta_cap_rx_bw(struct sta_info * sta)336 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
337 {
338 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
339 u32 cap_width;
340
341 if (!vht_cap->vht_supported)
342 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
343 IEEE80211_STA_RX_BW_40 :
344 IEEE80211_STA_RX_BW_20;
345
346 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
347
348 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
349 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
350 return IEEE80211_STA_RX_BW_160;
351
352 /*
353 * If this is non-zero, then it does support 160 MHz after all,
354 * in one form or the other. We don't distinguish here (or even
355 * above) between 160 and 80+80 yet.
356 */
357 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
358 return IEEE80211_STA_RX_BW_160;
359
360 return IEEE80211_STA_RX_BW_80;
361 }
362
ieee80211_sta_cap_chan_bw(struct sta_info * sta)363 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta)
364 {
365 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
366 u32 cap_width;
367
368 if (!vht_cap->vht_supported) {
369 if (!sta->sta.ht_cap.ht_supported)
370 return NL80211_CHAN_WIDTH_20_NOHT;
371
372 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
373 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
374 }
375
376 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
377
378 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
379 return NL80211_CHAN_WIDTH_160;
380 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
381 return NL80211_CHAN_WIDTH_80P80;
382
383 return NL80211_CHAN_WIDTH_80;
384 }
385
386 enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct sta_info * sta)387 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta)
388 {
389 enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth;
390 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
391 u32 cap_width;
392
393 switch (cur_bw) {
394 case IEEE80211_STA_RX_BW_20:
395 if (!sta->sta.ht_cap.ht_supported)
396 return NL80211_CHAN_WIDTH_20_NOHT;
397 else
398 return NL80211_CHAN_WIDTH_20;
399 case IEEE80211_STA_RX_BW_40:
400 return NL80211_CHAN_WIDTH_40;
401 case IEEE80211_STA_RX_BW_80:
402 return NL80211_CHAN_WIDTH_80;
403 case IEEE80211_STA_RX_BW_160:
404 cap_width =
405 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
406
407 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
408 return NL80211_CHAN_WIDTH_160;
409
410 return NL80211_CHAN_WIDTH_80P80;
411 default:
412 return NL80211_CHAN_WIDTH_20;
413 }
414 }
415
416 enum ieee80211_sta_rx_bandwidth
ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)417 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
418 {
419 switch (width) {
420 case NL80211_CHAN_WIDTH_20_NOHT:
421 case NL80211_CHAN_WIDTH_20:
422 return IEEE80211_STA_RX_BW_20;
423 case NL80211_CHAN_WIDTH_40:
424 return IEEE80211_STA_RX_BW_40;
425 case NL80211_CHAN_WIDTH_80:
426 return IEEE80211_STA_RX_BW_80;
427 case NL80211_CHAN_WIDTH_160:
428 case NL80211_CHAN_WIDTH_80P80:
429 return IEEE80211_STA_RX_BW_160;
430 default:
431 WARN_ON_ONCE(1);
432 return IEEE80211_STA_RX_BW_20;
433 }
434 }
435
ieee80211_sta_cur_vht_bw(struct sta_info * sta)436 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
437 {
438 struct ieee80211_sub_if_data *sdata = sta->sdata;
439 enum ieee80211_sta_rx_bandwidth bw;
440 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
441
442 bw = ieee80211_sta_cap_rx_bw(sta);
443 bw = min(bw, sta->cur_max_bandwidth);
444
445 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
446 * IEEE80211-2016 specification makes higher bandwidth operation
447 * possible on the TDLS link if the peers have wider bandwidth
448 * capability.
449 */
450 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
451 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
452 return bw;
453
454 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
455
456 return bw;
457 }
458
ieee80211_sta_set_rx_nss(struct sta_info * sta)459 void ieee80211_sta_set_rx_nss(struct sta_info *sta)
460 {
461 u8 ht_rx_nss = 0, vht_rx_nss = 0;
462
463 /* if we received a notification already don't overwrite it */
464 if (sta->sta.rx_nss)
465 return;
466
467 if (sta->sta.ht_cap.ht_supported) {
468 if (sta->sta.ht_cap.mcs.rx_mask[0])
469 ht_rx_nss++;
470 if (sta->sta.ht_cap.mcs.rx_mask[1])
471 ht_rx_nss++;
472 if (sta->sta.ht_cap.mcs.rx_mask[2])
473 ht_rx_nss++;
474 if (sta->sta.ht_cap.mcs.rx_mask[3])
475 ht_rx_nss++;
476 /* FIXME: consider rx_highest? */
477 }
478
479 if (sta->sta.vht_cap.vht_supported) {
480 int i;
481 u16 rx_mcs_map;
482
483 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
484
485 for (i = 7; i >= 0; i--) {
486 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
487
488 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
489 vht_rx_nss = i + 1;
490 break;
491 }
492 }
493 /* FIXME: consider rx_highest? */
494 }
495
496 ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
497 sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
498 }
499
__ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)500 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
501 struct sta_info *sta, u8 opmode,
502 enum nl80211_band band)
503 {
504 enum ieee80211_sta_rx_bandwidth new_bw;
505 struct sta_opmode_info sta_opmode = {};
506 u32 changed = 0;
507 u8 nss;
508
509 /* ignore - no support for BF yet */
510 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
511 return 0;
512
513 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
514 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
515 nss += 1;
516
517 if (sta->sta.rx_nss != nss) {
518 sta->sta.rx_nss = nss;
519 sta_opmode.rx_nss = nss;
520 changed |= IEEE80211_RC_NSS_CHANGED;
521 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
522 }
523
524 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
525 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
526 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
527 break;
528 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
529 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
530 break;
531 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
532 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
533 break;
534 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
535 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
536 break;
537 }
538
539 new_bw = ieee80211_sta_cur_vht_bw(sta);
540 if (new_bw != sta->sta.bandwidth) {
541 sta->sta.bandwidth = new_bw;
542 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta);
543 changed |= IEEE80211_RC_BW_CHANGED;
544 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
545 }
546
547 if (sta_opmode.changed)
548 cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr,
549 &sta_opmode, GFP_KERNEL);
550
551 return changed;
552 }
553
ieee80211_process_mu_groups(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt)554 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
555 struct ieee80211_mgmt *mgmt)
556 {
557 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
558
559 if (!sdata->vif.mu_mimo_owner)
560 return;
561
562 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
563 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
564 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
565 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
566 return;
567
568 memcpy(bss_conf->mu_group.membership,
569 mgmt->u.action.u.vht_group_notif.membership,
570 WLAN_MEMBERSHIP_LEN);
571 memcpy(bss_conf->mu_group.position,
572 mgmt->u.action.u.vht_group_notif.position,
573 WLAN_USER_POSITION_LEN);
574
575 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
576 }
577
ieee80211_update_mu_groups(struct ieee80211_vif * vif,const u8 * membership,const u8 * position)578 void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
579 const u8 *membership, const u8 *position)
580 {
581 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
582
583 if (WARN_ON_ONCE(!vif->mu_mimo_owner))
584 return;
585
586 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN);
587 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN);
588 }
589 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
590
ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)591 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
592 struct sta_info *sta, u8 opmode,
593 enum nl80211_band band)
594 {
595 struct ieee80211_local *local = sdata->local;
596 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
597
598 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band);
599
600 if (changed > 0) {
601 ieee80211_recalc_min_chandef(sdata);
602 rate_control_rate_update(local, sband, sta, changed);
603 }
604 }
605
ieee80211_get_vht_mask_from_cap(__le16 vht_cap,u16 vht_mask[NL80211_VHT_NSS_MAX])606 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
607 u16 vht_mask[NL80211_VHT_NSS_MAX])
608 {
609 int i;
610 u16 mask, cap = le16_to_cpu(vht_cap);
611
612 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
613 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
614 switch (mask) {
615 case IEEE80211_VHT_MCS_SUPPORT_0_7:
616 vht_mask[i] = 0x00FF;
617 break;
618 case IEEE80211_VHT_MCS_SUPPORT_0_8:
619 vht_mask[i] = 0x01FF;
620 break;
621 case IEEE80211_VHT_MCS_SUPPORT_0_9:
622 vht_mask[i] = 0x03FF;
623 break;
624 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
625 default:
626 vht_mask[i] = 0;
627 break;
628 }
629 }
630 }
631
