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
__check_vhtcap_disable(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap,u32 flag)19 static 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
ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_vht_cap * vht_cap)30 void 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
117 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)118 ieee80211_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
ieee80211_sta_cap_rx_bw(struct sta_info * sta)319 enum 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
ieee80211_sta_cap_chan_bw(struct sta_info * sta)338 enum 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
361 enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct sta_info * sta)362 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta)
363 {
364 enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth;
365 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
366 u32 cap_width;
367
368 switch (cur_bw) {
369 case IEEE80211_STA_RX_BW_20:
370 if (!sta->sta.ht_cap.ht_supported)
371 return NL80211_CHAN_WIDTH_20_NOHT;
372 else
373 return NL80211_CHAN_WIDTH_20;
374 case IEEE80211_STA_RX_BW_40:
375 return NL80211_CHAN_WIDTH_40;
376 case IEEE80211_STA_RX_BW_80:
377 return NL80211_CHAN_WIDTH_80;
378 case IEEE80211_STA_RX_BW_160:
379 cap_width =
380 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
381
382 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
383 return NL80211_CHAN_WIDTH_160;
384
385 return NL80211_CHAN_WIDTH_80P80;
386 default:
387 return NL80211_CHAN_WIDTH_20;
388 }
389 }
390
391 enum ieee80211_sta_rx_bandwidth
ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)392 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
393 {
394 switch (width) {
395 case NL80211_CHAN_WIDTH_20_NOHT:
396 case NL80211_CHAN_WIDTH_20:
397 return IEEE80211_STA_RX_BW_20;
398 case NL80211_CHAN_WIDTH_40:
399 return IEEE80211_STA_RX_BW_40;
400 case NL80211_CHAN_WIDTH_80:
401 return IEEE80211_STA_RX_BW_80;
402 case NL80211_CHAN_WIDTH_160:
403 case NL80211_CHAN_WIDTH_80P80:
404 return IEEE80211_STA_RX_BW_160;
405 default:
406 WARN_ON_ONCE(1);
407 return IEEE80211_STA_RX_BW_20;
408 }
409 }
410
ieee80211_sta_cur_vht_bw(struct sta_info * sta)411 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
412 {
413 struct ieee80211_sub_if_data *sdata = sta->sdata;
414 enum ieee80211_sta_rx_bandwidth bw;
415 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
416
417 bw = ieee80211_sta_cap_rx_bw(sta);
418 bw = min(bw, sta->cur_max_bandwidth);
419
420 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
421 * IEEE80211-2016 specification makes higher bandwidth operation
422 * possible on the TDLS link if the peers have wider bandwidth
423 * capability.
424 */
425 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
426 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
427 return bw;
428
429 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
430
431 return bw;
432 }
433
ieee80211_sta_set_rx_nss(struct sta_info * sta)434 void ieee80211_sta_set_rx_nss(struct sta_info *sta)
435 {
436 u8 ht_rx_nss = 0, vht_rx_nss = 0;
437
438 /* if we received a notification already don't overwrite it */
439 if (sta->sta.rx_nss)
440 return;
441
442 if (sta->sta.ht_cap.ht_supported) {
443 if (sta->sta.ht_cap.mcs.rx_mask[0])
444 ht_rx_nss++;
445 if (sta->sta.ht_cap.mcs.rx_mask[1])
446 ht_rx_nss++;
447 if (sta->sta.ht_cap.mcs.rx_mask[2])
448 ht_rx_nss++;
449 if (sta->sta.ht_cap.mcs.rx_mask[3])
450 ht_rx_nss++;
451 /* FIXME: consider rx_highest? */
452 }
453
454 if (sta->sta.vht_cap.vht_supported) {
455 int i;
456 u16 rx_mcs_map;
457
458 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
459
460 for (i = 7; i >= 0; i--) {
461 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
462
463 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
464 vht_rx_nss = i + 1;
465 break;
466 }
467 }
468 /* FIXME: consider rx_highest? */
469 }
470
471 ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
472 sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
473 }
474
__ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)475 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
476 struct sta_info *sta, u8 opmode,
477 enum nl80211_band band)
478 {
479 enum ieee80211_sta_rx_bandwidth new_bw;
480 struct sta_opmode_info sta_opmode = {};
481 u32 changed = 0;
482 u8 nss;
483
484 /* ignore - no support for BF yet */
485 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
486 return 0;
487
488 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
489 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
490 nss += 1;
491
492 if (sta->sta.rx_nss != nss) {
493 sta->sta.rx_nss = nss;
494 sta_opmode.rx_nss = nss;
495 changed |= IEEE80211_RC_NSS_CHANGED;
496 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
497 }
498
499 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
500 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
501 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
502 break;
503 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
504 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
505 break;
506 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
507 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
508 break;
509 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
510 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
511 break;
512 }
513
514 new_bw = ieee80211_sta_cur_vht_bw(sta);
515 if (new_bw != sta->sta.bandwidth) {
516 sta->sta.bandwidth = new_bw;
517 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta);
518 changed |= IEEE80211_RC_BW_CHANGED;
519 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
520 }
521
522 if (sta_opmode.changed)
523 cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr,
524 &sta_opmode, GFP_KERNEL);
525
526 return changed;
527 }
528
ieee80211_process_mu_groups(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt)529 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
530 struct ieee80211_mgmt *mgmt)
531 {
532 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
533
534 if (!sdata->vif.mu_mimo_owner)
535 return;
536
537 if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
538 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
539 !memcmp(mgmt->u.action.u.vht_group_notif.membership,
540 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
541 return;
542
543 memcpy(bss_conf->mu_group.membership,
544 mgmt->u.action.u.vht_group_notif.membership,
545 WLAN_MEMBERSHIP_LEN);
546 memcpy(bss_conf->mu_group.position,
547 mgmt->u.action.u.vht_group_notif.position,
548 WLAN_USER_POSITION_LEN);
549
550 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
551 }
552
ieee80211_update_mu_groups(struct ieee80211_vif * vif,const u8 * membership,const u8 * position)553 void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
554 const u8 *membership, const u8 *position)
555 {
556 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
557
558 if (WARN_ON_ONCE(!vif->mu_mimo_owner))
559 return;
560
561 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN);
562 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN);
563 }
564 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
565
ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,u8 opmode,enum nl80211_band band)566 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
567 struct sta_info *sta, u8 opmode,
568 enum nl80211_band band)
569 {
570 struct ieee80211_local *local = sdata->local;
571 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
572
573 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band);
574
575 if (changed > 0) {
576 ieee80211_recalc_min_chandef(sdata);
577 rate_control_rate_update(local, sband, sta, changed);
578 }
579 }
580
ieee80211_get_vht_mask_from_cap(__le16 vht_cap,u16 vht_mask[NL80211_VHT_NSS_MAX])581 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
582 u16 vht_mask[NL80211_VHT_NSS_MAX])
583 {
584 int i;
585 u16 mask, cap = le16_to_cpu(vht_cap);
586
587 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
588 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
589 switch (mask) {
590 case IEEE80211_VHT_MCS_SUPPORT_0_7:
591 vht_mask[i] = 0x00FF;
592 break;
593 case IEEE80211_VHT_MCS_SUPPORT_0_8:
594 vht_mask[i] = 0x01FF;
595 break;
596 case IEEE80211_VHT_MCS_SUPPORT_0_9:
597 vht_mask[i] = 0x03FF;
598 break;
599 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
600 default:
601 vht_mask[i] = 0;
602 break;
603 }
604 }
605 }
606
