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 - 2021 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 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 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 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_RXLDPC | 172 IEEE80211_VHT_CAP_VHT_TXOP_PS | 173 IEEE80211_VHT_CAP_HTC_VHT | 174 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK | 175 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB | 176 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB | 177 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 178 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; 179 180 vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK, 181 own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK); 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 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { 319 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 320 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; 321 break; 322 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 323 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; 324 break; 325 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: 326 default: 327 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; 328 break; 329 } 330 } 331 332 /* FIXME: move this to some better location - parses HE/EHT now */ 333 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta) 334 { 335 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; 336 struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; 337 struct ieee80211_sta_eht_cap *eht_cap = &sta->sta.eht_cap; 338 u32 cap_width; 339 340 if (he_cap->has_he) { 341 u8 info; 342 343 if (eht_cap->has_eht && 344 sta->sdata->vif.bss_conf.chandef.chan->band == 345 NL80211_BAND_6GHZ) { 346 info = eht_cap->eht_cap_elem.phy_cap_info[0]; 347 348 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 349 return IEEE80211_STA_RX_BW_320; 350 } 351 352 info = he_cap->he_cap_elem.phy_cap_info[0]; 353 354 if (sta->sdata->vif.bss_conf.chandef.chan->band == 355 NL80211_BAND_2GHZ) { 356 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 357 return IEEE80211_STA_RX_BW_40; 358 else 359 return IEEE80211_STA_RX_BW_20; 360 } 361 362 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || 363 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) 364 return IEEE80211_STA_RX_BW_160; 365 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) 366 return IEEE80211_STA_RX_BW_80; 367 368 return IEEE80211_STA_RX_BW_20; 369 } 370 371 if (!vht_cap->vht_supported) 372 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 373 IEEE80211_STA_RX_BW_40 : 374 IEEE80211_STA_RX_BW_20; 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 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 380 return IEEE80211_STA_RX_BW_160; 381 382 /* 383 * If this is non-zero, then it does support 160 MHz after all, 384 * in one form or the other. We don't distinguish here (or even 385 * above) between 160 and 80+80 yet. 386 */ 387 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 388 return IEEE80211_STA_RX_BW_160; 389 390 return IEEE80211_STA_RX_BW_80; 391 } 392 393 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta) 394 { 395 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; 396 u32 cap_width; 397 398 if (!vht_cap->vht_supported) { 399 if (!sta->sta.ht_cap.ht_supported) 400 return NL80211_CHAN_WIDTH_20_NOHT; 401 402 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 403 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 404 } 405 406 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 407 408 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 409 return NL80211_CHAN_WIDTH_160; 410 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 411 return NL80211_CHAN_WIDTH_80P80; 412 413 return NL80211_CHAN_WIDTH_80; 414 } 415 416 enum nl80211_chan_width 417 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta) 418 { 419 enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth; 420 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; 421 u32 cap_width; 422 423 switch (cur_bw) { 424 case IEEE80211_STA_RX_BW_20: 425 if (!sta->sta.ht_cap.ht_supported) 426 return NL80211_CHAN_WIDTH_20_NOHT; 427 else 428 return NL80211_CHAN_WIDTH_20; 429 case IEEE80211_STA_RX_BW_40: 430 return NL80211_CHAN_WIDTH_40; 431 case IEEE80211_STA_RX_BW_80: 432 return NL80211_CHAN_WIDTH_80; 433 case IEEE80211_STA_RX_BW_160: 434 cap_width = 435 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 436 437 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 438 return NL80211_CHAN_WIDTH_160; 439 440 return NL80211_CHAN_WIDTH_80P80; 441 default: 442 return NL80211_CHAN_WIDTH_20; 443 } 444 } 445 446 enum ieee80211_sta_rx_bandwidth 447 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) 448 { 449 switch (width) { 450 case NL80211_CHAN_WIDTH_20_NOHT: 451 case NL80211_CHAN_WIDTH_20: 452 return IEEE80211_STA_RX_BW_20; 453 case NL80211_CHAN_WIDTH_40: 454 return IEEE80211_STA_RX_BW_40; 455 case NL80211_CHAN_WIDTH_80: 456 return IEEE80211_STA_RX_BW_80; 457 case NL80211_CHAN_WIDTH_160: 458 case NL80211_CHAN_WIDTH_80P80: 459 return IEEE80211_STA_RX_BW_160; 460 case NL80211_CHAN_WIDTH_320: 461 return IEEE80211_STA_RX_BW_320; 462 default: 463 WARN_ON_ONCE(1); 464 return IEEE80211_STA_RX_BW_20; 465 } 466 } 467 468 /* FIXME: rename/move - this deals with everything not just VHT */ 469 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) 470 { 471 struct ieee80211_sub_if_data *sdata = sta->sdata; 472 enum ieee80211_sta_rx_bandwidth bw; 473 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; 474 475 bw = ieee80211_sta_cap_rx_bw(sta); 476 bw = min(bw, sta->cur_max_bandwidth); 477 478 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 479 * IEEE80211-2016 specification makes higher bandwidth operation 480 * possible on the TDLS link if the peers have wider bandwidth 481 * capability. 482 * 483 * However, in this case, and only if the TDLS peer is authorized, 484 * limit to the tdls_chandef so that the configuration here isn't 485 * wider than what's actually requested on the channel context. 486 */ 487 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 488 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && 489 test_sta_flag(sta, WLAN_STA_AUTHORIZED) && 490 sta->tdls_chandef.chan) 491 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); 492 else 493 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 494 495 return bw; 496 } 497 498 void ieee80211_sta_set_rx_nss(struct sta_info *sta) 499 { 500 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss; 501 bool support_160; 502 503 /* if we received a notification already don't overwrite it */ 504 if (sta->sta.rx_nss) 505 return; 506 507 if (sta->sta.eht_cap.has_eht) { 508 int i; 509 const u8 *rx_nss_mcs = (void *)&sta->sta.eht_cap.eht_mcs_nss_supp; 510 511 /* get the max nss for EHT over all possible bandwidths and mcs */ 512 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++) 513 eht_rx_nss = max_t(u8, eht_rx_nss, 514 u8_get_bits(rx_nss_mcs[i], 515 IEEE80211_EHT_MCS_NSS_RX)); 516 } 517 518 if (sta->sta.he_cap.has_he) { 519 int i; 520 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 521 const struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; 522 u16 mcs_160_map = 523 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 524 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 525 526 for (i = 7; i >= 0; i--) { 527 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 528 529 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 530 rx_mcs_160 = i + 1; 531 break; 532 } 533 } 534 for (i = 7; i >= 0; i--) { 535 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 536 537 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 538 rx_mcs_80 = i + 1; 539 break; 540 } 541 } 542 543 support_160 = he_cap->he_cap_elem.phy_cap_info[0] & 544 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 545 546 if (support_160) 547 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 548 else 549 he_rx_nss = rx_mcs_80; 550 } 551 552 if (sta->sta.ht_cap.ht_supported) { 553 if (sta->sta.ht_cap.mcs.rx_mask[0]) 554 ht_rx_nss++; 555 if (sta->sta.ht_cap.mcs.rx_mask[1]) 556 ht_rx_nss++; 557 if (sta->sta.ht_cap.mcs.rx_mask[2]) 558 ht_rx_nss++; 559 if (sta->sta.ht_cap.mcs.rx_mask[3]) 560 ht_rx_nss++; 561 /* FIXME: consider rx_highest? */ 562 } 563 564 if (sta->sta.vht_cap.vht_supported) { 565 int i; 566 u16 rx_mcs_map; 567 568 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map); 569 570 for (i = 7; i >= 0; i--) { 571 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 572 573 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 574 vht_rx_nss = i + 1; 575 break; 576 } 577 } 578 /* FIXME: consider rx_highest? */ 579 } 580 581 rx_nss = max(vht_rx_nss, ht_rx_nss); 582 rx_nss = max(he_rx_nss, rx_nss); 583 rx_nss = max(eht_rx_nss, rx_nss); 584 sta->sta.rx_nss = max_t(u8, 1, rx_nss); 585 } 586 587 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 588 struct sta_info *sta, u8 opmode, 589 enum nl80211_band band) 590 { 591 enum ieee80211_sta_rx_bandwidth new_bw; 592 struct sta_opmode_info sta_opmode = {}; 593 u32 changed = 0; 594 u8 nss; 595 596 /* ignore - no support for BF yet */ 597 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 598 return 0; 599 600 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 601 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 602 nss += 1; 603 604 if (sta->sta.rx_nss != nss) { 605 sta->sta.rx_nss = nss; 606 sta_opmode.rx_nss = nss; 607 changed |= IEEE80211_RC_NSS_CHANGED; 608 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 609 } 610 611 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 612 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 613 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 614 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 615 break; 616 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 617 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 618 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 619 break; 620 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 621 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 622 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 623 else 624 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 625 break; 626 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 627 /* legacy only, no longer used by newer spec */ 628 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 629 break; 630 } 631 632 new_bw = ieee80211_sta_cur_vht_bw(sta); 633 if (new_bw != sta->sta.bandwidth) { 634 sta->sta.bandwidth = new_bw; 635 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta); 636 changed |= IEEE80211_RC_BW_CHANGED; 637 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 638 } 639 640 if (sta_opmode.changed) 641 cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr, 642 &sta_opmode, GFP_KERNEL); 643 644 return changed; 645 } 646 647 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 648 struct ieee80211_mgmt *mgmt) 649 { 650 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 651 652 if (!sdata->vif.mu_mimo_owner) 653 return; 654 655 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 656 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 657 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 658 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 659 return; 660 661 memcpy(bss_conf->mu_group.membership, 662 mgmt->u.action.u.vht_group_notif.membership, 663 WLAN_MEMBERSHIP_LEN); 664 memcpy(bss_conf->mu_group.position, 665 mgmt->u.action.u.vht_group_notif.position, 666 WLAN_USER_POSITION_LEN); 667 668 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS); 669 } 670 671 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 672 const u8 *membership, const u8 *position) 673 { 674 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; 675 676 if (WARN_ON_ONCE(!vif->mu_mimo_owner)) 677 return; 678 679 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN); 680 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN); 681 } 682 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 683 684 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 685 struct sta_info *sta, u8 opmode, 686 enum nl80211_band band) 687 { 688 struct ieee80211_local *local = sdata->local; 689 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 690 691 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band); 692 693 if (changed > 0) { 694 ieee80211_recalc_min_chandef(sdata); 695 rate_control_rate_update(local, sband, sta, changed); 696 } 697 } 698 699 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 700 u16 vht_mask[NL80211_VHT_NSS_MAX]) 701 { 702 int i; 703 u16 mask, cap = le16_to_cpu(vht_cap); 704 705 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 706 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 707 switch (mask) { 708 case IEEE80211_VHT_MCS_SUPPORT_0_7: 709 vht_mask[i] = 0x00FF; 710 break; 711 case IEEE80211_VHT_MCS_SUPPORT_0_8: 712 vht_mask[i] = 0x01FF; 713 break; 714 case IEEE80211_VHT_MCS_SUPPORT_0_9: 715 vht_mask[i] = 0x03FF; 716 break; 717 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 718 default: 719 vht_mask[i] = 0; 720 break; 721 } 722 } 723 } 724