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 - 2020 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 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 u32 cap_width; 338 339 if (he_cap->has_he) { 340 u8 info = he_cap->he_cap_elem.phy_cap_info[0]; 341 342 if (sta->sdata->vif.bss_conf.chandef.chan->band == 343 NL80211_BAND_2GHZ) { 344 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 345 return IEEE80211_STA_RX_BW_40; 346 else 347 return IEEE80211_STA_RX_BW_20; 348 } 349 350 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || 351 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) 352 return IEEE80211_STA_RX_BW_160; 353 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) 354 return IEEE80211_STA_RX_BW_80; 355 356 return IEEE80211_STA_RX_BW_20; 357 } 358 359 if (!vht_cap->vht_supported) 360 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 361 IEEE80211_STA_RX_BW_40 : 362 IEEE80211_STA_RX_BW_20; 363 364 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 365 366 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 367 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 368 return IEEE80211_STA_RX_BW_160; 369 370 /* 371 * If this is non-zero, then it does support 160 MHz after all, 372 * in one form or the other. We don't distinguish here (or even 373 * above) between 160 and 80+80 yet. 374 */ 375 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 376 return IEEE80211_STA_RX_BW_160; 377 378 return IEEE80211_STA_RX_BW_80; 379 } 380 381 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta) 382 { 383 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; 384 u32 cap_width; 385 386 if (!vht_cap->vht_supported) { 387 if (!sta->sta.ht_cap.ht_supported) 388 return NL80211_CHAN_WIDTH_20_NOHT; 389 390 return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 391 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 392 } 393 394 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 395 396 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 397 return NL80211_CHAN_WIDTH_160; 398 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 399 return NL80211_CHAN_WIDTH_80P80; 400 401 return NL80211_CHAN_WIDTH_80; 402 } 403 404 enum nl80211_chan_width 405 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta) 406 { 407 enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth; 408 struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; 409 u32 cap_width; 410 411 switch (cur_bw) { 412 case IEEE80211_STA_RX_BW_20: 413 if (!sta->sta.ht_cap.ht_supported) 414 return NL80211_CHAN_WIDTH_20_NOHT; 415 else 416 return NL80211_CHAN_WIDTH_20; 417 case IEEE80211_STA_RX_BW_40: 418 return NL80211_CHAN_WIDTH_40; 419 case IEEE80211_STA_RX_BW_80: 420 return NL80211_CHAN_WIDTH_80; 421 case IEEE80211_STA_RX_BW_160: 422 cap_width = 423 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 424 425 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 426 return NL80211_CHAN_WIDTH_160; 427 428 return NL80211_CHAN_WIDTH_80P80; 429 default: 430 return NL80211_CHAN_WIDTH_20; 431 } 432 } 433 434 enum ieee80211_sta_rx_bandwidth 435 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) 436 { 437 switch (width) { 438 case NL80211_CHAN_WIDTH_20_NOHT: 439 case NL80211_CHAN_WIDTH_20: 440 return IEEE80211_STA_RX_BW_20; 441 case NL80211_CHAN_WIDTH_40: 442 return IEEE80211_STA_RX_BW_40; 443 case NL80211_CHAN_WIDTH_80: 444 return IEEE80211_STA_RX_BW_80; 445 case NL80211_CHAN_WIDTH_160: 446 case NL80211_CHAN_WIDTH_80P80: 447 return IEEE80211_STA_RX_BW_160; 448 default: 449 WARN_ON_ONCE(1); 450 return IEEE80211_STA_RX_BW_20; 451 } 452 } 453 454 /* FIXME: rename/move - this deals with everything not just VHT */ 455 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) 456 { 457 struct ieee80211_sub_if_data *sdata = sta->sdata; 458 enum ieee80211_sta_rx_bandwidth bw; 459 enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; 460 461 bw = ieee80211_sta_cap_rx_bw(sta); 462 bw = min(bw, sta->cur_max_bandwidth); 463 464 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 465 * IEEE80211-2016 specification makes higher bandwidth operation 466 * possible on the TDLS link if the peers have wider bandwidth 467 * capability. 468 */ 469 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 470 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) 471 return bw; 472 473 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 474 475 return bw; 476 } 477 478 void ieee80211_sta_set_rx_nss(struct sta_info *sta) 479 { 480 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, rx_nss; 481 482 /* if we received a notification already don't overwrite it */ 483 if (sta->sta.rx_nss) 484 return; 485 486 if (sta->sta.he_cap.has_he) { 487 int i; 488 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 489 const struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; 490 u16 mcs_160_map = 491 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 492 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 493 494 for (i = 7; i >= 0; i--) { 495 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 496 497 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 498 rx_mcs_160 = i + 1; 499 break; 500 } 501 } 502 for (i = 7; i >= 0; i--) { 503 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 504 505 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 506 rx_mcs_80 = i + 1; 507 break; 508 } 509 } 510 511 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 512 } 513 514 if (sta->sta.ht_cap.ht_supported) { 515 if (sta->sta.ht_cap.mcs.rx_mask[0]) 516 ht_rx_nss++; 517 if (sta->sta.ht_cap.mcs.rx_mask[1]) 518 ht_rx_nss++; 519 if (sta->sta.ht_cap.mcs.rx_mask[2]) 520 ht_rx_nss++; 521 if (sta->sta.ht_cap.mcs.rx_mask[3]) 522 ht_rx_nss++; 523 /* FIXME: consider rx_highest? */ 524 } 525 526 if (sta->sta.vht_cap.vht_supported) { 527 int i; 528 u16 rx_mcs_map; 529 530 rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map); 531 532 for (i = 7; i >= 0; i--) { 533 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 534 535 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 536 vht_rx_nss = i + 1; 537 break; 538 } 539 } 540 /* FIXME: consider rx_highest? */ 541 } 542 543 rx_nss = max(vht_rx_nss, ht_rx_nss); 544 rx_nss = max(he_rx_nss, rx_nss); 545 sta->sta.rx_nss = max_t(u8, 1, rx_nss); 546 } 547 548 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 549 struct sta_info *sta, u8 opmode, 550 enum nl80211_band band) 551 { 552 enum ieee80211_sta_rx_bandwidth new_bw; 553 struct sta_opmode_info sta_opmode = {}; 554 u32 changed = 0; 555 u8 nss; 556 557 /* ignore - no support for BF yet */ 558 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 559 return 0; 560 561 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 562 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 563 nss += 1; 564 565 if (sta->sta.rx_nss != nss) { 566 sta->sta.rx_nss = nss; 567 sta_opmode.rx_nss = nss; 568 changed |= IEEE80211_RC_NSS_CHANGED; 569 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 570 } 571 572 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 573 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 574 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 575 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 576 break; 577 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 578 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 579 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 580 break; 581 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 582 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 583 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 584 else 585 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 586 break; 587 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 588 /* legacy only, no longer used by newer spec */ 589 sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 590 break; 591 } 592 593 new_bw = ieee80211_sta_cur_vht_bw(sta); 594 if (new_bw != sta->sta.bandwidth) { 595 sta->sta.bandwidth = new_bw; 596 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta); 597 changed |= IEEE80211_RC_BW_CHANGED; 598 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 599 } 600 601 if (sta_opmode.changed) 602 cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr, 603 &sta_opmode, GFP_KERNEL); 604 605 return changed; 606 } 607 608 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 609 struct ieee80211_mgmt *mgmt) 610 { 611 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 612 613 if (!sdata->vif.mu_mimo_owner) 614 return; 615 616 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 617 bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 618 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 619 bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 620 return; 621 622 memcpy(bss_conf->mu_group.membership, 623 mgmt->u.action.u.vht_group_notif.membership, 624 WLAN_MEMBERSHIP_LEN); 625 memcpy(bss_conf->mu_group.position, 626 mgmt->u.action.u.vht_group_notif.position, 627 WLAN_USER_POSITION_LEN); 628 629 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS); 630 } 631 632 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 633 const u8 *membership, const u8 *position) 634 { 635 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; 636 637 if (WARN_ON_ONCE(!vif->mu_mimo_owner)) 638 return; 639 640 memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN); 641 memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN); 642 } 643 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 644 645 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 646 struct sta_info *sta, u8 opmode, 647 enum nl80211_band band) 648 { 649 struct ieee80211_local *local = sdata->local; 650 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 651 652 u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band); 653 654 if (changed > 0) { 655 ieee80211_recalc_min_chandef(sdata); 656 rate_control_rate_update(local, sband, sta, changed); 657 } 658 } 659 660 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 661 u16 vht_mask[NL80211_VHT_NSS_MAX]) 662 { 663 int i; 664 u16 mask, cap = le16_to_cpu(vht_cap); 665 666 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 667 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 668 switch (mask) { 669 case IEEE80211_VHT_MCS_SUPPORT_0_7: 670 vht_mask[i] = 0x00FF; 671 break; 672 case IEEE80211_VHT_MCS_SUPPORT_0_8: 673 vht_mask[i] = 0x01FF; 674 break; 675 case IEEE80211_VHT_MCS_SUPPORT_0_9: 676 vht_mask[i] = 0x03FF; 677 break; 678 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 679 default: 680 vht_mask[i] = 0; 681 break; 682 } 683 } 684 } 685