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 - 2026 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_sta_vht_cap *own_vht_cap, 119 const struct ieee80211_vht_cap *vht_cap_ie, 120 const struct ieee80211_vht_cap *vht_cap_ie2, 121 struct link_sta_info *link_sta) 122 { 123 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 124 struct ieee80211_sta_vht_cap own_cap; 125 u32 cap_info, i; 126 u32 mpdu_len; 127 128 memset(vht_cap, 0, sizeof(*vht_cap)); 129 130 if (!link_sta->pub->ht_cap.ht_supported) 131 return; 132 133 if (!vht_cap_ie || !own_vht_cap->vht_supported) 134 return; 135 136 /* NDI station are using the capabilities from the NMI station */ 137 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_NAN_DATA)) 138 return; 139 140 if (sband) { 141 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 142 bool have_80mhz = false; 143 144 for (i = 0; i < sband->n_channels; i++) { 145 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 146 IEEE80211_CHAN_NO_80MHZ)) 147 continue; 148 149 have_80mhz = true; 150 break; 151 } 152 153 if (!have_80mhz) 154 return; 155 } 156 157 /* 158 * A VHT STA must support 40 MHz, but if we verify that here 159 * then we break a few things - some APs (e.g. Netgear R6300v2 160 * and others based on the BCM4360 chipset) will unset this 161 * capability bit when operating in 20 MHz. 162 */ 163 164 vht_cap->vht_supported = true; 165 166 own_cap = *own_vht_cap; 167 /* 168 * If user has specified capability overrides, take care 169 * of that if the station we're setting up is the AP that 170 * we advertised a restricted capability set to. Override 171 * our own capabilities and then use those below. 172 */ 173 if (sdata->vif.type == NL80211_IFTYPE_STATION && 174 !test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER)) 175 ieee80211_apply_vhtcap_overrides(sdata, &own_cap); 176 177 /* take some capabilities as-is */ 178 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info); 179 vht_cap->cap = cap_info; 180 vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC | 181 IEEE80211_VHT_CAP_VHT_TXOP_PS | 182 IEEE80211_VHT_CAP_HTC_VHT | 183 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK | 184 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB | 185 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB | 186 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 187 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; 188 189 vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK, 190 own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK); 191 192 /* and some based on our own capabilities */ 193 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { 194 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: 195 vht_cap->cap |= cap_info & 196 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 197 break; 198 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: 199 vht_cap->cap |= cap_info & 200 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 201 break; 202 default: 203 /* nothing */ 204 break; 205 } 206 207 /* symmetric capabilities */ 208 vht_cap->cap |= cap_info & own_cap.cap & 209 (IEEE80211_VHT_CAP_SHORT_GI_80 | 210 IEEE80211_VHT_CAP_SHORT_GI_160); 211 212 /* remaining ones */ 213 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) 214 vht_cap->cap |= cap_info & 215 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 216 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK); 217 218 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) 219 vht_cap->cap |= cap_info & 220 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 221 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK); 222 223 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) 224 vht_cap->cap |= cap_info & 225 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 226 227 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) 228 vht_cap->cap |= cap_info & 229 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE; 230 231 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC) 232 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK; 233 234 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK) 235 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC; 236 237 /* Copy peer MCS info, the driver might need them. */ 238 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs, 239 sizeof(struct ieee80211_vht_mcs_info)); 240 241 /* copy EXT_NSS_BW Support value or remove the capability */ 242 if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW)) 243 vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 244 else 245 vht_cap->vht_mcs.tx_highest &= 246 ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 247 248 /* but also restrict MCSes */ 249 for (i = 0; i < 8; i++) { 250 u16 own_rx, own_tx, peer_rx, peer_tx; 251 252 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map); 253 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 254 255 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map); 256 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 257 258 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); 259 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 260 261 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); 262 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 263 264 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 265 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED) 266 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED; 267 else if (own_rx < peer_tx) 268 peer_tx = own_rx; 269 } 270 271 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 272 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED) 273 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED; 274 else if (own_tx < peer_rx) 275 peer_rx = own_tx; 276 } 277 278 vht_cap->vht_mcs.rx_mcs_map &= 279 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); 280 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2); 281 282 vht_cap->vht_mcs.tx_mcs_map &= 283 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); 284 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2); 285 } 286 287 /* 288 * This is a workaround for VHT-enabled STAs which break the spec 289 * and have the VHT-MCS Rx map filled in with value 3 for all eight 290 * spatial streams, an example is AR9462. 291 * 292 * As per spec, in section 22.1.1 Introduction to the VHT PHY 293 * A VHT STA shall support at least single spatial stream VHT-MCSs 294 * 0 to 7 (transmit and receive) in all supported channel widths. 295 */ 296 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) { 297 vht_cap->vht_supported = false; 298 sdata_info(sdata, 299 "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n", 300 link_sta->sta->addr, link_sta->addr); 301 return; 302 } 303 304 /* finally set up the bandwidth */ 305 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { 306 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: 307 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: 308 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 309 break; 310 default: 311 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 312 313 if (!(vht_cap->vht_mcs.tx_highest & 314 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) 315 break; 316 317 /* 318 * If this is non-zero, then it does support 160 MHz after all, 319 * in one form or the other. We don't distinguish here (or even 320 * above) between 160 and 80+80 yet. 321 */ 322 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 323 link_sta->cur_max_bandwidth = 324 IEEE80211_STA_RX_BW_160; 325 } 326 327 if (sdata->vif.type != NL80211_IFTYPE_NAN) 328 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); 329 330 /* 331 * Work around the Cisco 9115 FW 17.3 bug by taking the min of 332 * both reported MPDU lengths. 333 */ 334 mpdu_len = vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK; 335 if (vht_cap_ie2) 336 mpdu_len = min_t(u32, mpdu_len, 337 le32_get_bits(vht_cap_ie2->vht_cap_info, 338 IEEE80211_VHT_CAP_MAX_MPDU_MASK)); 339 340 /* 341 * FIXME - should the amsdu len be per link? store per link 342 * and maintain a minimum? 343 */ 344 switch (mpdu_len) { 345 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 346 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; 347 break; 348 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 349 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; 350 break; 351 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: 352 default: 353 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; 354 break; 355 } 356 357 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta); 358 } 359 360 /* FIXME: move this to some better location - parses HE/EHT now */ 361 static enum ieee80211_sta_rx_bandwidth 362 __ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta, 363 struct cfg80211_chan_def *chandef) 364 { 365 unsigned int link_id = link_sta->link_id; 366 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata; 367 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 368 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 369 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; 370 u32 cap_width; 371 372 if (he_cap->has_he) { 373 enum nl80211_band band; 374 u8 info; 375 376 if (chandef) { 377 band = chandef->chan->band; 378 } else { 379 struct ieee80211_bss_conf *link_conf; 380 381 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_NAN_DATA || 382 sdata->vif.type == NL80211_IFTYPE_NAN)) 383 return IEEE80211_STA_RX_BW_20; 384 385 rcu_read_lock(); 386 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]); 387 band = link_conf->chanreq.oper.chan->band; 388 rcu_read_unlock(); 389 } 390 391 if (eht_cap->has_eht && band == NL80211_BAND_6GHZ) { 392 info = eht_cap->eht_cap_elem.phy_cap_info[0]; 393 394 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 395 return IEEE80211_STA_RX_BW_320; 396 } 397 398 info = he_cap->he_cap_elem.phy_cap_info[0]; 399 400 if (band == NL80211_BAND_2GHZ) { 401 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 402 return IEEE80211_STA_RX_BW_40; 403 return IEEE80211_STA_RX_BW_20; 404 } 405 406 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || 407 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) 408 return IEEE80211_STA_RX_BW_160; 409 410 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) 411 return IEEE80211_STA_RX_BW_80; 412 413 return IEEE80211_STA_RX_BW_20; 414 } 415 416 if (!vht_cap->vht_supported) 417 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 418 IEEE80211_STA_RX_BW_40 : 419 IEEE80211_STA_RX_BW_20; 420 421 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 422 423 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 424 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 425 return IEEE80211_STA_RX_BW_160; 426 427 /* 428 * If this is non-zero, then it does support 160 MHz after all, 429 * in one form or the other. We don't distinguish here (or even 430 * above) between 160 and 80+80 yet. 431 */ 432 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 433 return IEEE80211_STA_RX_BW_160; 434 435 return IEEE80211_STA_RX_BW_80; 436 } 437 438 enum ieee80211_sta_rx_bandwidth 439 _ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta, 440 struct cfg80211_chan_def *chandef) 441 { 442 /* 443 * With RX OMI, also pretend that the STA's capability changed. 444 * Of course this isn't really true, it didn't change, only our 445 * RX capability was changed by notifying RX OMI to the STA. 446 * The purpose, however, is to save power, and that requires 447 * changing also transmissions to the AP and the chanctx. The 448 * transmissions depend on link_sta->bandwidth which is set in 449 * _ieee80211_sta_cur_vht_bw() below, but the chanctx depends 450 * on the result of this function which is also called by 451 * _ieee80211_sta_cur_vht_bw(), so we need to do that here as 452 * well. This is sufficient for the steady state, but during 453 * the transition we already need to change TX/RX separately, 454 * so _ieee80211_sta_cur_vht_bw() below applies the _tx one. 455 */ 456 return min(__ieee80211_sta_cap_rx_bw(link_sta, chandef), 457 link_sta->rx_omi_bw_rx); 458 } 459 460 enum nl80211_chan_width 461 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta) 462 { 463 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 464 u32 cap_width; 465 466 if (!vht_cap->vht_supported) { 467 if (!link_sta->pub->ht_cap.ht_supported) 468 return NL80211_CHAN_WIDTH_20_NOHT; 469 470 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 471 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 472 } 473 474 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 475 476 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 477 return NL80211_CHAN_WIDTH_160; 478 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 479 return NL80211_CHAN_WIDTH_80P80; 480 481 return NL80211_CHAN_WIDTH_80; 482 } 483 484 enum nl80211_chan_width 485 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta) 486 { 487 enum ieee80211_sta_rx_bandwidth cur_bw = 488 link_sta->pub->bandwidth; 489 struct ieee80211_sta_vht_cap *vht_cap = 490 &link_sta->pub->vht_cap; 491 u32 cap_width; 492 493 switch (cur_bw) { 494 case IEEE80211_STA_RX_BW_20: 495 if (!link_sta->pub->ht_cap.ht_supported) 496 return NL80211_CHAN_WIDTH_20_NOHT; 497 else 498 return NL80211_CHAN_WIDTH_20; 499 case IEEE80211_STA_RX_BW_40: 500 return NL80211_CHAN_WIDTH_40; 501 case IEEE80211_STA_RX_BW_80: 502 return NL80211_CHAN_WIDTH_80; 503 case IEEE80211_STA_RX_BW_160: 504 cap_width = 505 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 506 507 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 508 return NL80211_CHAN_WIDTH_160; 509 510 return NL80211_CHAN_WIDTH_80P80; 511 default: 512 return NL80211_CHAN_WIDTH_20; 513 } 514 } 515 516 /* FIXME: rename/move - this deals with everything not just VHT */ 517 enum ieee80211_sta_rx_bandwidth 518 _ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta, 519 struct cfg80211_chan_def *chandef) 520 { 521 struct sta_info *sta = link_sta->sta; 522 enum nl80211_chan_width bss_width; 523 enum ieee80211_sta_rx_bandwidth bw; 524 525 if (chandef) { 526 bss_width = chandef->width; 527 } else { 528 struct ieee80211_bss_conf *link_conf; 529 530 /* NAN operates on multiple channels so a chandef must be given */ 531 if (WARN_ON_ONCE(sta->sdata->vif.type == NL80211_IFTYPE_NAN || 532 sta->sdata->vif.type == NL80211_IFTYPE_NAN_DATA)) 533 return IEEE80211_STA_RX_BW_20; 534 535 rcu_read_lock(); 536 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]); 537 if (WARN_ON_ONCE(!link_conf)) { 538 rcu_read_unlock(); 539 return IEEE80211_STA_RX_BW_20; 540 } 541 bss_width = link_conf->chanreq.oper.width; 542 rcu_read_unlock(); 543 } 544 545 /* intentionally do not take rx_bw_omi_rx into account */ 546 bw = __ieee80211_sta_cap_rx_bw(link_sta, chandef); 547 bw = min(bw, link_sta->cur_max_bandwidth); 548 /* but do apply rx_omi_bw_tx */ 549 bw = min(bw, link_sta->rx_omi_bw_tx); 550 551 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 552 * IEEE80211-2016 specification makes higher bandwidth operation 553 * possible on the TDLS link if the peers have wider bandwidth 554 * capability. 555 * 556 * However, in this case, and only if the TDLS peer is authorized, 557 * limit to the tdls_chandef so that the configuration here isn't 558 * wider than what's actually requested on the channel context. 559 */ 560 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 561 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && 562 test_sta_flag(sta, WLAN_STA_AUTHORIZED) && 563 sta->tdls_chandef.chan) 564 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); 565 else 566 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 567 568 return bw; 569 } 570 571 void ieee80211_sta_init_nss(struct link_sta_info *link_sta) 572 { 573 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss; 574 bool support_160; 575 576 if (link_sta->pub->eht_cap.has_eht) { 577 int i; 578 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp; 579 580 /* get the max nss for EHT over all possible bandwidths and mcs */ 581 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++) 582 eht_rx_nss = max_t(u8, eht_rx_nss, 583 u8_get_bits(rx_nss_mcs[i], 584 IEEE80211_EHT_MCS_NSS_RX)); 585 } 586 587 if (link_sta->pub->he_cap.has_he) { 588 int i; 589 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 590 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 591 u16 mcs_160_map = 592 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 593 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 594 595 for (i = 7; i >= 0; i--) { 596 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 597 598 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 599 rx_mcs_160 = i + 1; 600 break; 601 } 602 } 603 for (i = 7; i >= 0; i--) { 604 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 605 606 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 607 rx_mcs_80 = i + 1; 608 break; 609 } 610 } 611 612 support_160 = he_cap->he_cap_elem.phy_cap_info[0] & 613 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 614 615 if (support_160) 616 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 617 else 618 he_rx_nss = rx_mcs_80; 619 } 620 621 if (link_sta->pub->ht_cap.ht_supported) { 622 if (link_sta->pub->ht_cap.mcs.rx_mask[0]) 623 ht_rx_nss++; 624 if (link_sta->pub->ht_cap.mcs.rx_mask[1]) 625 ht_rx_nss++; 626 if (link_sta->pub->ht_cap.mcs.rx_mask[2]) 627 ht_rx_nss++; 628 if (link_sta->pub->ht_cap.mcs.rx_mask[3]) 629 ht_rx_nss++; 630 /* FIXME: consider rx_highest? */ 631 } 632 633 if (link_sta->pub->vht_cap.vht_supported) { 634 int i; 635 u16 rx_mcs_map; 636 637 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map); 638 639 for (i = 7; i >= 0; i--) { 640 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 641 642 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 643 vht_rx_nss = i + 1; 644 break; 645 } 646 } 647 /* FIXME: consider rx_highest? */ 648 } 649 650 rx_nss = max(vht_rx_nss, ht_rx_nss); 651 rx_nss = max(he_rx_nss, rx_nss); 652 rx_nss = max(eht_rx_nss, rx_nss); 653 rx_nss = max_t(u8, 1, rx_nss); 654 link_sta->capa_nss = rx_nss; 655 656 /* that shouldn't be set yet, but we can handle it anyway */ 657 if (link_sta->op_mode_nss) 658 link_sta->pub->rx_nss = 659 min_t(u8, rx_nss, link_sta->op_mode_nss); 660 else 661 link_sta->pub->rx_nss = rx_nss; 662 } 663 664 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 665 struct link_sta_info *link_sta, 666 u8 opmode, enum nl80211_band band) 667 { 668 enum ieee80211_sta_rx_bandwidth new_bw; 669 struct sta_opmode_info sta_opmode = {}; 670 u32 changed = 0; 671 u8 nss; 672 673 /* ignore - no support for BF yet */ 674 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 675 return 0; 676 677 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 678 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 679 nss += 1; 680 681 if (link_sta->op_mode_nss != nss) { 682 if (nss <= link_sta->capa_nss) { 683 link_sta->op_mode_nss = nss; 684 685 if (nss != link_sta->pub->rx_nss) { 686 link_sta->pub->rx_nss = nss; 687 changed |= IEEE80211_RC_NSS_CHANGED; 688 sta_opmode.rx_nss = link_sta->pub->rx_nss; 689 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 690 } 691 } else { 692 sdata_dbg(sdata, 693 "Ignore NSS change to invalid %d in VHT opmode notif from %pM", 694 nss, link_sta->pub->addr); 695 } 696 } 697 698 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 699 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 700 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 701 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 702 break; 703 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 704 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 705 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 706 break; 707 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 708 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 709 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 710 else 711 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 712 break; 713 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 714 /* legacy only, no longer used by newer spec */ 715 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 716 break; 717 } 718 719 new_bw = ieee80211_sta_cur_vht_bw(link_sta); 720 if (new_bw != link_sta->pub->bandwidth) { 721 link_sta->pub->bandwidth = new_bw; 722 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta); 723 changed |= IEEE80211_RC_BW_CHANGED; 724 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 725 } 726 727 if (sta_opmode.changed) 728 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr, 729 &sta_opmode, GFP_KERNEL); 730 731 return changed; 732 } 733 734 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 735 struct ieee80211_link_data *link, 736 struct ieee80211_mgmt *mgmt) 737 { 738 struct ieee80211_bss_conf *link_conf = link->conf; 739 740 if (!link_conf->mu_mimo_owner) 741 return; 742 743 if (!memcmp(mgmt->u.action.vht_group_notif.position, 744 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 745 !memcmp(mgmt->u.action.vht_group_notif.membership, 746 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 747 return; 748 749 memcpy(link_conf->mu_group.membership, 750 mgmt->u.action.vht_group_notif.membership, 751 WLAN_MEMBERSHIP_LEN); 752 memcpy(link_conf->mu_group.position, 753 mgmt->u.action.vht_group_notif.position, 754 WLAN_USER_POSITION_LEN); 755 756 ieee80211_link_info_change_notify(sdata, link, 757 BSS_CHANGED_MU_GROUPS); 758 } 759 760 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id, 761 const u8 *membership, const u8 *position) 762 { 763 struct ieee80211_bss_conf *link_conf; 764 765 rcu_read_lock(); 766 link_conf = rcu_dereference(vif->link_conf[link_id]); 767 768 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) { 769 memcpy(link_conf->mu_group.membership, membership, 770 WLAN_MEMBERSHIP_LEN); 771 memcpy(link_conf->mu_group.position, position, 772 WLAN_USER_POSITION_LEN); 773 } 774 rcu_read_unlock(); 775 } 776 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 777 778 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 779 struct link_sta_info *link_sta, 780 u8 opmode, enum nl80211_band band) 781 { 782 struct ieee80211_local *local = sdata->local; 783 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 784 785 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta, 786 opmode, band); 787 788 if (changed > 0) { 789 ieee80211_recalc_min_chandef(sdata, link_sta->link_id); 790 rate_control_rate_update(local, sband, link_sta, changed); 791 } 792 } 793 794 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 795 u16 vht_mask[NL80211_VHT_NSS_MAX]) 796 { 797 int i; 798 u16 mask, cap = le16_to_cpu(vht_cap); 799 800 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 801 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 802 switch (mask) { 803 case IEEE80211_VHT_MCS_SUPPORT_0_7: 804 vht_mask[i] = 0x00FF; 805 break; 806 case IEEE80211_VHT_MCS_SUPPORT_0_8: 807 vht_mask[i] = 0x01FF; 808 break; 809 case IEEE80211_VHT_MCS_SUPPORT_0_9: 810 vht_mask[i] = 0x03FF; 811 break; 812 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 813 default: 814 vht_mask[i] = 0; 815 break; 816 } 817 } 818 } 819