blob: ff1c798921a6acc90181923456cf92bed0973f61 [file] [log] [blame]
Mahesh Palivela818255e2012-10-10 11:33:04 +00001/*
2 * VHT handling
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/ieee80211.h>
10#include <linux/export.h>
11#include <net/mac80211.h>
12#include "ieee80211_i.h"
Johannes Berg0af83d32012-12-27 18:55:36 +010013#include "rate.h"
Mahesh Palivela818255e2012-10-10 11:33:04 +000014
15
Johannes Bergdd5ecfe2013-02-21 17:40:19 +010016static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
17 struct ieee80211_sta_vht_cap *vht_cap,
18 u32 flag)
19{
20 __le32 le_flag = cpu_to_le32(flag);
21
22 if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
23 !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
24 vht_cap->cap &= ~flag;
25}
26
27void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
28 struct ieee80211_sta_vht_cap *vht_cap)
29{
30 int i;
31 u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
32
33 if (!vht_cap->vht_supported)
34 return;
35
36 if (sdata->vif.type != NL80211_IFTYPE_STATION)
37 return;
38
39 __check_vhtcap_disable(sdata, vht_cap,
40 IEEE80211_VHT_CAP_RXLDPC);
41 __check_vhtcap_disable(sdata, vht_cap,
42 IEEE80211_VHT_CAP_SHORT_GI_80);
43 __check_vhtcap_disable(sdata, vht_cap,
44 IEEE80211_VHT_CAP_SHORT_GI_160);
45 __check_vhtcap_disable(sdata, vht_cap,
46 IEEE80211_VHT_CAP_TXSTBC);
47 __check_vhtcap_disable(sdata, vht_cap,
48 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
49 __check_vhtcap_disable(sdata, vht_cap,
50 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
51 __check_vhtcap_disable(sdata, vht_cap,
52 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
53 __check_vhtcap_disable(sdata, vht_cap,
54 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
55
56 /* Allow user to decrease AMPDU length exponent */
57 if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
58 cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
59 u32 cap, n;
60
61 n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
62 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
63 n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
64 cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
65 cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
66
67 if (n < cap) {
68 vht_cap->cap &=
69 ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
70 vht_cap->cap |=
71 n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
72 }
73 }
74
75 /* Allow the user to decrease MCSes */
76 rxmcs_mask =
77 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
78 rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
79 rxmcs_n &= rxmcs_mask;
80 rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
81
82 txmcs_mask =
83 le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
84 txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
85 txmcs_n &= txmcs_mask;
86 txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
87 for (i = 0; i < 8; i++) {
88 u8 m, n, c;
89
90 m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
91 n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
92 c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
93
94 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
95 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
96 rxmcs_cap &= ~(3 << 2*i);
97 rxmcs_cap |= (rxmcs_n & (3 << 2*i));
98 }
99
100 m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
101 n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
102 c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
103
104 if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
105 n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
106 txmcs_cap &= ~(3 << 2*i);
107 txmcs_cap |= (txmcs_n & (3 << 2*i));
108 }
109 }
110 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
111 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
112}
113
Johannes Berg4a3cb702013-02-12 16:43:19 +0100114void
115ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
116 struct ieee80211_supported_band *sband,
117 const struct ieee80211_vht_cap *vht_cap_ie,
118 struct sta_info *sta)
Mahesh Palivela818255e2012-10-10 11:33:04 +0000119{
Johannes Berg4a342152013-02-07 11:58:58 +0100120 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
Johannes Berg55d942f2013-03-01 13:07:48 +0100121 struct ieee80211_sta_vht_cap own_cap;
122 u32 cap_info, i;
Arik Nemtsov52a45f32015-08-15 22:39:53 +0300123 bool have_80mhz;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000124
125 memset(vht_cap, 0, sizeof(*vht_cap));
126
Johannes Berg4a342152013-02-07 11:58:58 +0100127 if (!sta->sta.ht_cap.ht_supported)
128 return;
129
Mahesh Palivela818255e2012-10-10 11:33:04 +0000130 if (!vht_cap_ie || !sband->vht_cap.vht_supported)
131 return;
132
Arik Nemtsov52a45f32015-08-15 22:39:53 +0300133 /* Allow VHT if at least one channel on the sband supports 80 MHz */
134 have_80mhz = false;
135 for (i = 0; i < sband->n_channels; i++) {
136 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
137 IEEE80211_CHAN_NO_80MHZ))
138 continue;
139
140 have_80mhz = true;
141 break;
142 }
143
144 if (!have_80mhz)
145 return;
146
Johannes Berg4a817aa2014-05-09 09:56:53 +0200147 /*
148 * A VHT STA must support 40 MHz, but if we verify that here
149 * then we break a few things - some APs (e.g. Netgear R6300v2
150 * and others based on the BCM4360 chipset) will unset this
151 * capability bit when operating in 20 MHz.
152 */
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100153
Mahesh Palivela818255e2012-10-10 11:33:04 +0000154 vht_cap->vht_supported = true;
155
Johannes Berg55d942f2013-03-01 13:07:48 +0100156 own_cap = sband->vht_cap;
157 /*
158 * If user has specified capability overrides, take care
159 * of that if the station we're setting up is the AP that
160 * we advertised a restricted capability set to. Override
161 * our own capabilities and then use those below.
162 */
163 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
164 !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
165 ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
166
167 /* take some capabilities as-is */
168 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
169 vht_cap->cap = cap_info;
170 vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
171 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
172 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
173 IEEE80211_VHT_CAP_RXLDPC |
174 IEEE80211_VHT_CAP_VHT_TXOP_PS |
175 IEEE80211_VHT_CAP_HTC_VHT |
176 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
177 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
178 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
179 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
180 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
181
182 /* and some based on our own capabilities */
183 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
184 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
185 vht_cap->cap |= cap_info &
186 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
187 break;
188 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
189 vht_cap->cap |= cap_info &
190 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
191 break;
192 default:
193 /* nothing */
194 break;
195 }
196
197 /* symmetric capabilities */
198 vht_cap->cap |= cap_info & own_cap.cap &
199 (IEEE80211_VHT_CAP_SHORT_GI_80 |
200 IEEE80211_VHT_CAP_SHORT_GI_160);
201
202 /* remaining ones */
Eyal Shapirafbdd90e2013-11-11 20:14:00 +0200203 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
Johannes Berg55d942f2013-03-01 13:07:48 +0100204 vht_cap->cap |= cap_info &
205 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
Eyal Shapirafbdd90e2013-11-11 20:14:00 +0200206 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
Johannes Berg55d942f2013-03-01 13:07:48 +0100207
208 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
209 vht_cap->cap |= cap_info &
Eliad Peller5eb79062013-08-29 15:03:14 +0300210 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
Eyal Shapirafbdd90e2013-11-11 20:14:00 +0200211 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
Johannes Berg55d942f2013-03-01 13:07:48 +0100212
213 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
214 vht_cap->cap |= cap_info &
215 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
216
217 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
218 vht_cap->cap |= cap_info &
219 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
220
221 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
222 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
223
224 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
225 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000226
227 /* Copy peer MCS info, the driver might need them. */
228 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
229 sizeof(struct ieee80211_vht_mcs_info));
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100230
Johannes Berg55d942f2013-03-01 13:07:48 +0100231 /* but also restrict MCSes */
232 for (i = 0; i < 8; i++) {
233 u16 own_rx, own_tx, peer_rx, peer_tx;
234
235 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
236 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
237
238 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
239 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
240
241 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
242 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
243
244 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
245 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
246
247 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
248 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
249 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
250 else if (own_rx < peer_tx)
251 peer_tx = own_rx;
252 }
253
254 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
255 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
256 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
257 else if (own_tx < peer_rx)
258 peer_rx = own_tx;
259 }
260
261 vht_cap->vht_mcs.rx_mcs_map &=
262 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
263 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
264
265 vht_cap->vht_mcs.tx_mcs_map &=
266 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
267 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
268 }
269
270 /* finally set up the bandwidth */
Johannes Berg0af83d32012-12-27 18:55:36 +0100271 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
272 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
273 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
274 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
275 break;
276 default:
277 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
278 }
279
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100280 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
281}
282
Eliad Peller1c45c5c2014-12-14 11:05:51 +0200283enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
284{
285 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
286 u32 cap_width;
287
288 if (!vht_cap->vht_supported)
289 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
290 IEEE80211_STA_RX_BW_40 :
291 IEEE80211_STA_RX_BW_20;
292
293 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
294
295 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
296 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
297 return IEEE80211_STA_RX_BW_160;
298
299 return IEEE80211_STA_RX_BW_80;
300}
301
302static enum ieee80211_sta_rx_bandwidth
303ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
304{
305 switch (width) {
306 case NL80211_CHAN_WIDTH_20_NOHT:
307 case NL80211_CHAN_WIDTH_20:
308 return IEEE80211_STA_RX_BW_20;
309 case NL80211_CHAN_WIDTH_40:
310 return IEEE80211_STA_RX_BW_40;
311 case NL80211_CHAN_WIDTH_80:
312 return IEEE80211_STA_RX_BW_80;
313 case NL80211_CHAN_WIDTH_160:
314 case NL80211_CHAN_WIDTH_80P80:
315 return IEEE80211_STA_RX_BW_160;
316 default:
317 WARN_ON_ONCE(1);
318 return IEEE80211_STA_RX_BW_20;
319 }
320}
321
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100322enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
323{
324 struct ieee80211_sub_if_data *sdata = sta->sdata;
Johannes Berg0af83d32012-12-27 18:55:36 +0100325 enum ieee80211_sta_rx_bandwidth bw;
Arik Nemtsovb98fb442015-06-10 20:42:59 +0300326 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100327
Arik Nemtsovb98fb442015-06-10 20:42:59 +0300328 bw = ieee80211_sta_cap_rx_bw(sta);
Eliad Peller1c45c5c2014-12-14 11:05:51 +0200329 bw = min(bw, sta->cur_max_bandwidth);
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100330
Arik Nemtsovb98fb442015-06-10 20:42:59 +0300331 /* do not cap the BW of TDLS WIDER_BW peers by the bss */
332 if (!test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
333 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
334
Johannes Berg0af83d32012-12-27 18:55:36 +0100335 return bw;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000336}
Johannes Berg8921d042012-12-27 18:26:42 +0100337
338void ieee80211_sta_set_rx_nss(struct sta_info *sta)
339{
340 u8 ht_rx_nss = 0, vht_rx_nss = 0;
341
342 /* if we received a notification already don't overwrite it */
343 if (sta->sta.rx_nss)
344 return;
345
346 if (sta->sta.ht_cap.ht_supported) {
347 if (sta->sta.ht_cap.mcs.rx_mask[0])
348 ht_rx_nss++;
349 if (sta->sta.ht_cap.mcs.rx_mask[1])
350 ht_rx_nss++;
351 if (sta->sta.ht_cap.mcs.rx_mask[2])
352 ht_rx_nss++;
353 if (sta->sta.ht_cap.mcs.rx_mask[3])
354 ht_rx_nss++;
355 /* FIXME: consider rx_highest? */
356 }
357
358 if (sta->sta.vht_cap.vht_supported) {
359 int i;
360 u16 rx_mcs_map;
361
362 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
363
364 for (i = 7; i >= 0; i--) {
365 u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
366
367 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
368 vht_rx_nss = i + 1;
369 break;
370 }
371 }
372 /* FIXME: consider rx_highest? */
373 }
374
375 ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
376 sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
377}
Johannes Berg0af83d32012-12-27 18:55:36 +0100378
Marek Kwaczynskib1bce142014-02-03 14:44:44 +0100379u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
380 struct sta_info *sta, u8 opmode,
381 enum ieee80211_band band, bool nss_only)
Johannes Berg0af83d32012-12-27 18:55:36 +0100382{
383 struct ieee80211_local *local = sdata->local;
384 struct ieee80211_supported_band *sband;
385 enum ieee80211_sta_rx_bandwidth new_bw;
386 u32 changed = 0;
387 u8 nss;
388
389 sband = local->hw.wiphy->bands[band];
390
391 /* ignore - no support for BF yet */
392 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
Marek Kwaczynskib1bce142014-02-03 14:44:44 +0100393 return 0;
Johannes Berg0af83d32012-12-27 18:55:36 +0100394
395 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
396 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
397 nss += 1;
398
399 if (sta->sta.rx_nss != nss) {
400 sta->sta.rx_nss = nss;
401 changed |= IEEE80211_RC_NSS_CHANGED;
402 }
403
Johannes Bergbee7f582013-02-07 22:24:55 +0100404 if (nss_only)
Marek Kwaczynskib1bce142014-02-03 14:44:44 +0100405 return changed;
Johannes Bergbee7f582013-02-07 22:24:55 +0100406
Johannes Berg0af83d32012-12-27 18:55:36 +0100407 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
408 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
409 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
410 break;
411 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
412 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
413 break;
414 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
415 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
416 break;
417 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
418 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
419 break;
420 }
421
422 new_bw = ieee80211_sta_cur_vht_bw(sta);
423 if (new_bw != sta->sta.bandwidth) {
424 sta->sta.bandwidth = new_bw;
Ilan Peer38745c72013-06-10 10:34:14 +0300425 changed |= IEEE80211_RC_BW_CHANGED;
Johannes Berg0af83d32012-12-27 18:55:36 +0100426 }
427
Marek Kwaczynskib1bce142014-02-03 14:44:44 +0100428 return changed;
429}
430
431void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
432 struct sta_info *sta, u8 opmode,
433 enum ieee80211_band band, bool nss_only)
434{
435 struct ieee80211_local *local = sdata->local;
436 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
437
438 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode,
439 band, nss_only);
440
441 if (changed > 0)
Johannes Berg0af83d32012-12-27 18:55:36 +0100442 rate_control_rate_update(local, sband, sta, changed);
443}
Lorenzo Bianconib119ad62015-08-06 23:47:33 +0200444
445void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
446 u16 vht_mask[NL80211_VHT_NSS_MAX])
447{
448 int i;
449 u16 mask, cap = le16_to_cpu(vht_cap);
450
451 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
452 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
453 switch (mask) {
454 case IEEE80211_VHT_MCS_SUPPORT_0_7:
455 vht_mask[i] = 0x00FF;
456 break;
457 case IEEE80211_VHT_MCS_SUPPORT_0_8:
458 vht_mask[i] = 0x01FF;
459 break;
460 case IEEE80211_VHT_MCS_SUPPORT_0_9:
461 vht_mask[i] = 0x03FF;
462 break;
463 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
464 default:
465 vht_mask[i] = 0;
466 break;
467 }
468 }
469}