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 - 2022 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 link_sta_info *link_sta) 120 { 121 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->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 (!link_sta->pub->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(link_sta->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, 290 "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n", 291 link_sta->sta->addr, link_sta->addr); 292 return; 293 } 294 295 /* finally set up the bandwidth */ 296 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { 297 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: 298 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: 299 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 300 break; 301 default: 302 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 303 304 if (!(vht_cap->vht_mcs.tx_highest & 305 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) 306 break; 307 308 /* 309 * If this is non-zero, then it does support 160 MHz after all, 310 * in one form or the other. We don't distinguish here (or even 311 * above) between 160 and 80+80 yet. 312 */ 313 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 314 link_sta->cur_max_bandwidth = 315 IEEE80211_STA_RX_BW_160; 316 } 317 318 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); 319 320 /* 321 * FIXME - should the amsdu len be per link? store per link 322 * and maintain a minimum? 323 */ 324 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { 325 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 326 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; 327 break; 328 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 329 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; 330 break; 331 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: 332 default: 333 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; 334 break; 335 } 336 337 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta); 338 } 339 340 /* FIXME: move this to some better location - parses HE/EHT now */ 341 enum ieee80211_sta_rx_bandwidth 342 ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta) 343 { 344 unsigned int link_id = link_sta->link_id; 345 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata; 346 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 347 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 348 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; 349 u32 cap_width; 350 351 if (he_cap->has_he) { 352 struct ieee80211_bss_conf *link_conf; 353 enum ieee80211_sta_rx_bandwidth ret; 354 u8 info; 355 356 rcu_read_lock(); 357 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]); 358 359 if (eht_cap->has_eht && 360 link_conf->chandef.chan->band == NL80211_BAND_6GHZ) { 361 info = eht_cap->eht_cap_elem.phy_cap_info[0]; 362 363 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) { 364 ret = IEEE80211_STA_RX_BW_320; 365 goto out; 366 } 367 } 368 369 info = he_cap->he_cap_elem.phy_cap_info[0]; 370 371 if (link_conf->chandef.chan->band == NL80211_BAND_2GHZ) { 372 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 373 ret = IEEE80211_STA_RX_BW_40; 374 else 375 ret = IEEE80211_STA_RX_BW_20; 376 goto out; 377 } 378 379 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || 380 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) 381 ret = IEEE80211_STA_RX_BW_160; 382 else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) 383 ret = IEEE80211_STA_RX_BW_80; 384 else 385 ret = IEEE80211_STA_RX_BW_20; 386 out: 387 rcu_read_unlock(); 388 389 return ret; 390 } 391 392 if (!vht_cap->vht_supported) 393 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 394 IEEE80211_STA_RX_BW_40 : 395 IEEE80211_STA_RX_BW_20; 396 397 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 398 399 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 400 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 401 return IEEE80211_STA_RX_BW_160; 402 403 /* 404 * If this is non-zero, then it does support 160 MHz after all, 405 * in one form or the other. We don't distinguish here (or even 406 * above) between 160 and 80+80 yet. 407 */ 408 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 409 return IEEE80211_STA_RX_BW_160; 410 411 return IEEE80211_STA_RX_BW_80; 412 } 413 414 enum nl80211_chan_width 415 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta) 416 { 417 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 418 u32 cap_width; 419 420 if (!vht_cap->vht_supported) { 421 if (!link_sta->pub->ht_cap.ht_supported) 422 return NL80211_CHAN_WIDTH_20_NOHT; 423 424 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 425 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 426 } 427 428 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 429 430 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 431 return NL80211_CHAN_WIDTH_160; 432 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 433 return NL80211_CHAN_WIDTH_80P80; 434 435 return NL80211_CHAN_WIDTH_80; 436 } 437 438 enum nl80211_chan_width 439 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta) 440 { 441 enum ieee80211_sta_rx_bandwidth cur_bw = 442 link_sta->pub->bandwidth; 443 struct ieee80211_sta_vht_cap *vht_cap = 444 &link_sta->pub->vht_cap; 445 u32 cap_width; 446 447 switch (cur_bw) { 448 case IEEE80211_STA_RX_BW_20: 449 if (!link_sta->pub->ht_cap.ht_supported) 450 return NL80211_CHAN_WIDTH_20_NOHT; 451 else 452 return NL80211_CHAN_WIDTH_20; 453 case IEEE80211_STA_RX_BW_40: 454 return NL80211_CHAN_WIDTH_40; 455 case IEEE80211_STA_RX_BW_80: 456 return NL80211_CHAN_WIDTH_80; 457 case IEEE80211_STA_RX_BW_160: 458 cap_width = 459 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 460 461 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 462 return NL80211_CHAN_WIDTH_160; 463 464 return NL80211_CHAN_WIDTH_80P80; 465 default: 466 return NL80211_CHAN_WIDTH_20; 467 } 468 } 469 470 enum ieee80211_sta_rx_bandwidth 471 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) 472 { 473 switch (width) { 474 case NL80211_CHAN_WIDTH_20_NOHT: 475 case NL80211_CHAN_WIDTH_20: 476 return IEEE80211_STA_RX_BW_20; 477 case NL80211_CHAN_WIDTH_40: 478 return IEEE80211_STA_RX_BW_40; 479 case NL80211_CHAN_WIDTH_80: 480 return IEEE80211_STA_RX_BW_80; 481 case NL80211_CHAN_WIDTH_160: 482 case NL80211_CHAN_WIDTH_80P80: 483 return IEEE80211_STA_RX_BW_160; 484 case NL80211_CHAN_WIDTH_320: 485 return IEEE80211_STA_RX_BW_320; 486 default: 487 WARN_ON_ONCE(1); 488 return IEEE80211_STA_RX_BW_20; 489 } 490 } 491 492 /* FIXME: rename/move - this deals with everything not just VHT */ 493 enum ieee80211_sta_rx_bandwidth 494 ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta) 495 { 496 struct sta_info *sta = link_sta->sta; 497 struct ieee80211_bss_conf *link_conf; 498 enum nl80211_chan_width bss_width; 499 enum ieee80211_sta_rx_bandwidth bw; 500 501 rcu_read_lock(); 502 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]); 503 if (WARN_ON(!link_conf)) 504 bss_width = NL80211_CHAN_WIDTH_20_NOHT; 505 else 506 bss_width = link_conf->chandef.width; 507 rcu_read_unlock(); 508 509 bw = ieee80211_sta_cap_rx_bw(link_sta); 510 bw = min(bw, link_sta->cur_max_bandwidth); 511 512 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 513 * IEEE80211-2016 specification makes higher bandwidth operation 514 * possible on the TDLS link if the peers have wider bandwidth 515 * capability. 516 * 517 * However, in this case, and only if the TDLS peer is authorized, 518 * limit to the tdls_chandef so that the configuration here isn't 519 * wider than what's actually requested on the channel context. 520 */ 521 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 522 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && 523 test_sta_flag(sta, WLAN_STA_AUTHORIZED) && 524 sta->tdls_chandef.chan) 525 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); 526 else 527 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 528 529 return bw; 530 } 531 532 void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta) 533 { 534 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss; 535 bool support_160; 536 537 /* if we received a notification already don't overwrite it */ 538 if (link_sta->pub->rx_nss) 539 return; 540 541 if (link_sta->pub->eht_cap.has_eht) { 542 int i; 543 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp; 544 545 /* get the max nss for EHT over all possible bandwidths and mcs */ 546 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++) 547 eht_rx_nss = max_t(u8, eht_rx_nss, 548 u8_get_bits(rx_nss_mcs[i], 549 IEEE80211_EHT_MCS_NSS_RX)); 550 } 551 552 if (link_sta->pub->he_cap.has_he) { 553 int i; 554 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 555 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 556 u16 mcs_160_map = 557 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 558 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 559 560 for (i = 7; i >= 0; i--) { 561 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 562 563 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 564 rx_mcs_160 = i + 1; 565 break; 566 } 567 } 568 for (i = 7; i >= 0; i--) { 569 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 570 571 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 572 rx_mcs_80 = i + 1; 573 break; 574 } 575 } 576 577 support_160 = he_cap->he_cap_elem.phy_cap_info[0] & 578 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 579 580 if (support_160) 581 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 582 else 583 he_rx_nss = rx_mcs_80; 584 } 585 586 if (link_sta->pub->ht_cap.ht_supported) { 587 if (link_sta->pub->ht_cap.mcs.rx_mask[0]) 588 ht_rx_nss++; 589 if (link_sta->pub->ht_cap.mcs.rx_mask[1]) 590 ht_rx_nss++; 591 if (link_sta->pub->ht_cap.mcs.rx_mask[2]) 592 ht_rx_nss++; 593 if (link_sta->pub->ht_cap.mcs.rx_mask[3]) 594 ht_rx_nss++; 595 /* FIXME: consider rx_highest? */ 596 } 597 598 if (link_sta->pub->vht_cap.vht_supported) { 599 int i; 600 u16 rx_mcs_map; 601 602 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map); 603 604 for (i = 7; i >= 0; i--) { 605 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 606 607 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 608 vht_rx_nss = i + 1; 609 break; 610 } 611 } 612 /* FIXME: consider rx_highest? */ 613 } 614 615 rx_nss = max(vht_rx_nss, ht_rx_nss); 616 rx_nss = max(he_rx_nss, rx_nss); 617 rx_nss = max(eht_rx_nss, rx_nss); 618 link_sta->pub->rx_nss = max_t(u8, 1, rx_nss); 619 } 620 621 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 622 struct link_sta_info *link_sta, 623 u8 opmode, enum nl80211_band band) 624 { 625 enum ieee80211_sta_rx_bandwidth new_bw; 626 struct sta_opmode_info sta_opmode = {}; 627 u32 changed = 0; 628 u8 nss; 629 630 /* ignore - no support for BF yet */ 631 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 632 return 0; 633 634 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 635 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 636 nss += 1; 637 638 if (link_sta->pub->rx_nss != nss) { 639 link_sta->pub->rx_nss = nss; 640 sta_opmode.rx_nss = nss; 641 changed |= IEEE80211_RC_NSS_CHANGED; 642 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 643 } 644 645 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 646 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 647 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 648 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 649 break; 650 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 651 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 652 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 653 break; 654 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 655 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 656 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 657 else 658 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 659 break; 660 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 661 /* legacy only, no longer used by newer spec */ 662 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 663 break; 664 } 665 666 new_bw = ieee80211_sta_cur_vht_bw(link_sta); 667 if (new_bw != link_sta->pub->bandwidth) { 668 link_sta->pub->bandwidth = new_bw; 669 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta); 670 changed |= IEEE80211_RC_BW_CHANGED; 671 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 672 } 673 674 if (sta_opmode.changed) 675 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr, 676 &sta_opmode, GFP_KERNEL); 677 678 return changed; 679 } 680 681 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 682 struct ieee80211_link_data *link, 683 struct ieee80211_mgmt *mgmt) 684 { 685 struct ieee80211_bss_conf *link_conf = link->conf; 686 687 if (!link_conf->mu_mimo_owner) 688 return; 689 690 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 691 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 692 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 693 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 694 return; 695 696 memcpy(link_conf->mu_group.membership, 697 mgmt->u.action.u.vht_group_notif.membership, 698 WLAN_MEMBERSHIP_LEN); 699 memcpy(link_conf->mu_group.position, 700 mgmt->u.action.u.vht_group_notif.position, 701 WLAN_USER_POSITION_LEN); 702 703 ieee80211_link_info_change_notify(sdata, link, 704 BSS_CHANGED_MU_GROUPS); 705 } 706 707 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id, 708 const u8 *membership, const u8 *position) 709 { 710 struct ieee80211_bss_conf *link_conf; 711 712 rcu_read_lock(); 713 link_conf = rcu_dereference(vif->link_conf[link_id]); 714 715 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) { 716 memcpy(link_conf->mu_group.membership, membership, 717 WLAN_MEMBERSHIP_LEN); 718 memcpy(link_conf->mu_group.position, position, 719 WLAN_USER_POSITION_LEN); 720 } 721 rcu_read_unlock(); 722 } 723 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 724 725 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 726 struct link_sta_info *link_sta, 727 u8 opmode, enum nl80211_band band) 728 { 729 struct ieee80211_local *local = sdata->local; 730 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 731 732 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta, 733 opmode, band); 734 735 if (changed > 0) { 736 ieee80211_recalc_min_chandef(sdata, link_sta->link_id); 737 rate_control_rate_update(local, sband, link_sta->sta, 738 link_sta->link_id, changed); 739 } 740 } 741 742 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 743 u16 vht_mask[NL80211_VHT_NSS_MAX]) 744 { 745 int i; 746 u16 mask, cap = le16_to_cpu(vht_cap); 747 748 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 749 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 750 switch (mask) { 751 case IEEE80211_VHT_MCS_SUPPORT_0_7: 752 vht_mask[i] = 0x00FF; 753 break; 754 case IEEE80211_VHT_MCS_SUPPORT_0_8: 755 vht_mask[i] = 0x01FF; 756 break; 757 case IEEE80211_VHT_MCS_SUPPORT_0_9: 758 vht_mask[i] = 0x03FF; 759 break; 760 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 761 default: 762 vht_mask[i] = 0; 763 break; 764 } 765 } 766 } 767