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