net/mac80211/vht.c

   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
  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
  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
 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         /* finally set up the bandwidth */
 274         switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
 275         case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
 276         case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
 277                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
 278                 break;
 279         default:
 280                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
 281         }
 282
 283         sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
 284
 285         /* If HT IE reported 3839 bytes only, stay with that size. */
 286         if (sta->sta.max_amsdu_len == IEEE80211_MAX_MPDU_LEN_HT_3839)
 287                 return;
 288
 289         switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
 290         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 291                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
 292                 break;
 293         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 294                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
 295                 break;
 296         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 297         default:
 298                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
 299                 break;
 300         }
 301 }
 302
 303 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
 304 {
 305         struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
 306         u32 cap_width;
 307
 308         if (!vht_cap->vht_supported)
 309                 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
 310                                 IEEE80211_STA_RX_BW_40 :
 311                                 IEEE80211_STA_RX_BW_20;
 312
 313         cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 314
 315         if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
 316             cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 317                 return IEEE80211_STA_RX_BW_160;
 318
 319         return IEEE80211_STA_RX_BW_80;
 320 }
 321
 322 static enum ieee80211_sta_rx_bandwidth
 323 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
 324 {
 325         switch (width) {
 326         case NL80211_CHAN_WIDTH_20_NOHT:
 327         case NL80211_CHAN_WIDTH_20:
 328                 return IEEE80211_STA_RX_BW_20;
 329         case NL80211_CHAN_WIDTH_40:
 330                 return IEEE80211_STA_RX_BW_40;
 331         case NL80211_CHAN_WIDTH_80:
 332                 return IEEE80211_STA_RX_BW_80;
 333         case NL80211_CHAN_WIDTH_160:
 334         case NL80211_CHAN_WIDTH_80P80:
 335                 return IEEE80211_STA_RX_BW_160;
 336         default:
 337                 WARN_ON_ONCE(1);
 338                 return IEEE80211_STA_RX_BW_20;
 339         }
 340 }
 341
 342 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
 343 {
 344         struct ieee80211_sub_if_data *sdata = sta->sdata;
 345         enum ieee80211_sta_rx_bandwidth bw;
 346         enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width;
 347
 348         bw = ieee80211_sta_cap_rx_bw(sta);
 349         bw = min(bw, sta->cur_max_bandwidth);
 350
 351         /* do not cap the BW of TDLS WIDER_BW peers by the bss */
 352         if (!test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 353                 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width));
 354
 355         return bw;
 356 }
 357
 358 void ieee80211_sta_set_rx_nss(struct sta_info *sta)
 359 {
 360         u8 ht_rx_nss = 0, vht_rx_nss = 0;
 361
 362         /* if we received a notification already don't overwrite it */
 363         if (sta->sta.rx_nss)
 364                 return;
 365
 366         if (sta->sta.ht_cap.ht_supported) {
 367                 if (sta->sta.ht_cap.mcs.rx_mask[0])
 368                         ht_rx_nss++;
 369                 if (sta->sta.ht_cap.mcs.rx_mask[1])
 370                         ht_rx_nss++;
 371                 if (sta->sta.ht_cap.mcs.rx_mask[2])
 372                         ht_rx_nss++;
 373                 if (sta->sta.ht_cap.mcs.rx_mask[3])
 374                         ht_rx_nss++;
 375                 /* FIXME: consider rx_highest? */
 376         }
 377
 378         if (sta->sta.vht_cap.vht_supported) {
 379                 int i;
 380                 u16 rx_mcs_map;
 381
 382                 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
 383
 384                 for (i = 7; i >= 0; i--) {
 385                         u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
 386
 387                         if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
 388                                 vht_rx_nss = i + 1;
 389                                 break;
 390                         }
 391                 }
 392                 /* FIXME: consider rx_highest? */
 393         }
 394
 395         ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
 396         sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
 397 }
 398
 399 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
 400                                   struct sta_info *sta, u8 opmode,
 401                                   enum ieee80211_band band)
 402 {
 403         struct ieee80211_local *local = sdata->local;
 404         struct ieee80211_supported_band *sband;
 405         enum ieee80211_sta_rx_bandwidth new_bw;
 406         u32 changed = 0;
 407         u8 nss;
 408
 409         sband = local->hw.wiphy->bands[band];
 410
 411         /* ignore - no support for BF yet */
 412         if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
 413                 return 0;
 414
 415         nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
 416         nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
 417         nss += 1;
 418
 419         if (sta->sta.rx_nss != nss) {
 420                 sta->sta.rx_nss = nss;
 421                 changed |= IEEE80211_RC_NSS_CHANGED;
 422         }
 423
 424         switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
 425         case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
 426                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
 427                 break;
 428         case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
 429                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
 430                 break;
 431         case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
 432                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
 433                 break;
 434         case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
 435                 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
 436                 break;
 437         }
 438
 439         new_bw = ieee80211_sta_cur_vht_bw(sta);
 440         if (new_bw != sta->sta.bandwidth) {
 441                 sta->sta.bandwidth = new_bw;
 442                 changed |= IEEE80211_RC_BW_CHANGED;
 443         }
 444
 445         return changed;
 446 }
 447
 448 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
 449                                  struct ieee80211_mgmt *mgmt)
 450 {
 451         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 452
 453         if (!sdata->vif.mu_mimo_owner)
 454                 return;
 455
 456         if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
 457                     bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
 458             !memcmp(mgmt->u.action.u.vht_group_notif.membership,
 459                     bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
 460                 return;
 461
 462         memcpy(bss_conf->mu_group.membership,
 463                mgmt->u.action.u.vht_group_notif.membership,
 464                WLAN_MEMBERSHIP_LEN);
 465         memcpy(bss_conf->mu_group.position,
 466                mgmt->u.action.u.vht_group_notif.position,
 467                WLAN_USER_POSITION_LEN);
 468
 469         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
 470 }
 471
 472 void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
 473                                 const u8 *membership, const u8 *position)
 474 {
 475         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 476
 477         if (WARN_ON_ONCE(!vif->mu_mimo_owner))
 478                 return;
 479
 480         memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN);
 481         memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN);
 482 }
 483 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
 484
 485 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
 486                                  struct sta_info *sta, u8 opmode,
 487                                  enum ieee80211_band band)
 488 {
 489         struct ieee80211_local *local = sdata->local;
 490         struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
 491
 492         u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band);
 493
 494         if (changed > 0)
 495                 rate_control_rate_update(local, sband, sta, changed);
 496 }
 497
 498 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
 499                                      u16 vht_mask[NL80211_VHT_NSS_MAX])
 500 {
 501         int i;
 502         u16 mask, cap = le16_to_cpu(vht_cap);
 503
 504         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
 505                 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
 506                 switch (mask) {
 507                 case IEEE80211_VHT_MCS_SUPPORT_0_7:
 508                         vht_mask[i] = 0x00FF;
 509                         break;
 510                 case IEEE80211_VHT_MCS_SUPPORT_0_8:
 511                         vht_mask[i] = 0x01FF;
 512                         break;
 513                 case IEEE80211_VHT_MCS_SUPPORT_0_9:
 514                         vht_mask[i] = 0x03FF;
 515                         break;
 516                 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
 517                 default:
 518                         vht_mask[i] = 0;
 519                         break;
 520                 }
 521         }
 522 }