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 /* 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 } 318 319 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 } 337 338 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 ieee80211_sta_rx_bandwidth 362 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) 363 { 364 switch (width) { 365 case NL80211_CHAN_WIDTH_20_NOHT: 366 case NL80211_CHAN_WIDTH_20: 367 return IEEE80211_STA_RX_BW_20; 368 case NL80211_CHAN_WIDTH_40: 369 return IEEE80211_STA_RX_BW_40; 370 case NL80211_CHAN_WIDTH_80: 371 return IEEE80211_STA_RX_BW_80; 372 case NL80211_CHAN_WIDTH_160: 373 case NL80211_CHAN_WIDTH_80P80: 374 return IEEE80211_STA_RX_BW_160; 375 default: 376 WARN_ON_ONCE(1); 377 return IEEE80211_STA_RX_BW_20; 378 } 379 } 380 381 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) 382 { 383 struct ieee80211_sub_if_data *sdata = sta->sdata; 384 enum ieee80211_sta_rx_bandwidth bw; 385 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; 386 387 bw = ieee80211_sta_cap_rx_bw(sta); 388 bw = min(bw, sta->cur_max_bandwidth); 389 390 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 391 * IEEE80211-2016 specification makes higher bandwidth operation 392 * possible on the TDLS link if the peers have wider bandwidth 393 * capability. 394 */ 395 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 396 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) 397 return bw; 398 399 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 400 401 return bw; 402 } 403 404 void ieee80211_sta_set_rx_nss(struct sta_info *sta) 405 { 406 u8 ht_rx_nss = 0, vht_rx_nss = 0; 407 408 /* if we received a notification already don't overwrite it */ 409 if (sta->sta.rx_nss) 410 return; 411 412 if (sta->sta.ht_cap.ht_supported) { 413 if (sta->sta.ht_cap.mcs.rx_mask[0]) 414 ht_rx_nss++; 415 if (sta->sta.ht_cap.mcs.rx_mask[1]) 416 ht_rx_nss++; 417 if (sta->sta.ht_cap.mcs.rx_mask[2]) 418 ht_rx_nss++; 419 if (sta->sta.ht_cap.mcs.rx_mask[3]) 420 ht_rx_nss++; 421 /* FIXME: consider rx_highest? */ 422 } 423 424 if (sta->sta.vht_cap.vht_supported) { 425 int i; 426 u16 rx_mcs_map; 427 428 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map); 429 430 for (i = 7; i >= 0; i--) { 431 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 432 433 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 434 vht_rx_nss = i + 1; 435 break; 436 } 437 } 438 /* FIXME: consider rx_highest? */ 439 } 440 441 ht_rx_nss = max(ht_rx_nss, vht_rx_nss); 442 sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss); 443 } 444 445 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 446 struct sta_info *sta, u8 opmode, 447 enum nl80211_band band) 448 { 449 enum ieee80211_sta_rx_bandwidth new_bw; 450 u32 changed = 0; 451 u8 nss; 452 453 /* ignore - no support for BF yet */ 454 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 455 return 0; 456 457 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 458 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 459 nss += 1; 460 461 if (sta->sta.rx_nss != nss) { 462 sta->sta.rx_nss = nss; 463 changed |= IEEE80211_RC_NSS_CHANGED; 464 } 465 466 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 467 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 468 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 469 break; 470 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 471 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 472 break; 473 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 474 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 475 break; 476 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 477 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 478 break; 479 } 480 481 new_bw = ieee80211_sta_cur_vht_bw(sta); 482 if (new_bw != sta->sta.bandwidth) { 483 sta->sta.bandwidth = new_bw; 484 changed |= IEEE80211_RC_BW_CHANGED; 485 } 486 487 return changed; 488 } 489 490 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 491 struct ieee80211_mgmt *mgmt) 492 { 493 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 494 495 if (!sdata->vif.mu_mimo_owner) 496 return; 497 498 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 499 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 500 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 501 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 502 return; 503 504 memcpy(bss_conf->mu_group.membership, 505 mgmt->u.action.u.vht_group_notif.membership, 506 WLAN_MEMBERSHIP_LEN); 507 memcpy(bss_conf->mu_group.position, 508 mgmt->u.action.u.vht_group_notif.position, 509 WLAN_USER_POSITION_LEN); 510 511 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS); 512 } 513 514 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 515 const u8 *membership, const u8 *position) 516 { 517 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; 518 519 if (WARN_ON_ONCE(!vif->mu_mimo_owner)) 520 return; 521 522 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN); 523 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN); 524 } 525 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 526 527 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 528 struct sta_info *sta, u8 opmode, 529 enum nl80211_band band) 530 { 531 struct ieee80211_local *local = sdata->local; 532 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 533 534 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band); 535 536 if (changed > 0) { 537 ieee80211_recalc_min_chandef(sdata); 538 rate_control_rate_update(local, sband, sta, changed); 539 } 540 } 541 542 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 543 u16 vht_mask[NL80211_VHT_NSS_MAX]) 544 { 545 int i; 546 u16 mask, cap = le16_to_cpu(vht_cap); 547 548 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 549 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 550 switch (mask) { 551 case IEEE80211_VHT_MCS_SUPPORT_0_7: 552 vht_mask[i] = 0x00FF; 553 break; 554 case IEEE80211_VHT_MCS_SUPPORT_0_8: 555 vht_mask[i] = 0x01FF; 556 break; 557 case IEEE80211_VHT_MCS_SUPPORT_0_9: 558 vht_mask[i] = 0x03FF; 559 break; 560 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 561 default: 562 vht_mask[i] = 0; 563 break; 564 } 565 } 566 } 567