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 - 2024 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 const struct ieee80211_vht_cap *vht_cap_ie2, 120 struct link_sta_info *link_sta) 121 { 122 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 123 struct ieee80211_sta_vht_cap own_cap; 124 u32 cap_info, i; 125 bool have_80mhz; 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 || !sband->vht_cap.vht_supported) 134 return; 135 136 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 137 have_80mhz = false; 138 for (i = 0; i < sband->n_channels; i++) { 139 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 140 IEEE80211_CHAN_NO_80MHZ)) 141 continue; 142 143 have_80mhz = true; 144 break; 145 } 146 147 if (!have_80mhz) 148 return; 149 150 /* 151 * A VHT STA must support 40 MHz, but if we verify that here 152 * then we break a few things - some APs (e.g. Netgear R6300v2 153 * and others based on the BCM4360 chipset) will unset this 154 * capability bit when operating in 20 MHz. 155 */ 156 157 vht_cap->vht_supported = true; 158 159 own_cap = sband->vht_cap; 160 /* 161 * If user has specified capability overrides, take care 162 * of that if the station we're setting up is the AP that 163 * we advertised a restricted capability set to. Override 164 * our own capabilities and then use those below. 165 */ 166 if (sdata->vif.type == NL80211_IFTYPE_STATION && 167 !test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER)) 168 ieee80211_apply_vhtcap_overrides(sdata, &own_cap); 169 170 /* take some capabilities as-is */ 171 cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info); 172 vht_cap->cap = cap_info; 173 vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC | 174 IEEE80211_VHT_CAP_VHT_TXOP_PS | 175 IEEE80211_VHT_CAP_HTC_VHT | 176 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK | 177 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB | 178 IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB | 179 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 180 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; 181 182 vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK, 183 own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK); 184 185 /* and some based on our own capabilities */ 186 switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { 187 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: 188 vht_cap->cap |= cap_info & 189 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 190 break; 191 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: 192 vht_cap->cap |= cap_info & 193 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 194 break; 195 default: 196 /* nothing */ 197 break; 198 } 199 200 /* symmetric capabilities */ 201 vht_cap->cap |= cap_info & own_cap.cap & 202 (IEEE80211_VHT_CAP_SHORT_GI_80 | 203 IEEE80211_VHT_CAP_SHORT_GI_160); 204 205 /* remaining ones */ 206 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) 207 vht_cap->cap |= cap_info & 208 (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 209 IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK); 210 211 if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) 212 vht_cap->cap |= cap_info & 213 (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 214 IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK); 215 216 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) 217 vht_cap->cap |= cap_info & 218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 219 220 if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) 221 vht_cap->cap |= cap_info & 222 IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE; 223 224 if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC) 225 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK; 226 227 if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK) 228 vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC; 229 230 /* Copy peer MCS info, the driver might need them. */ 231 memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs, 232 sizeof(struct ieee80211_vht_mcs_info)); 233 234 /* copy EXT_NSS_BW Support value or remove the capability */ 235 if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW)) 236 vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 237 else 238 vht_cap->vht_mcs.tx_highest &= 239 ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 240 241 /* but also restrict MCSes */ 242 for (i = 0; i < 8; i++) { 243 u16 own_rx, own_tx, peer_rx, peer_tx; 244 245 own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map); 246 own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 247 248 own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map); 249 own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 250 251 peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); 252 peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 253 254 peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); 255 peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 256 257 if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 258 if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED) 259 peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED; 260 else if (own_rx < peer_tx) 261 peer_tx = own_rx; 262 } 263 264 if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 265 if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED) 266 peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED; 267 else if (own_tx < peer_rx) 268 peer_rx = own_tx; 269 } 270 271 vht_cap->vht_mcs.rx_mcs_map &= 272 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); 273 vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2); 274 275 vht_cap->vht_mcs.tx_mcs_map &= 276 ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); 277 vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2); 278 } 279 280 /* 281 * This is a workaround for VHT-enabled STAs which break the spec 282 * and have the VHT-MCS Rx map filled in with value 3 for all eight 283 * spatial streams, an example is AR9462. 284 * 285 * As per spec, in section 22.1.1 Introduction to the VHT PHY 286 * A VHT STA shall support at least single spatial stream VHT-MCSs 287 * 0 to 7 (transmit and receive) in all supported channel widths. 288 */ 289 if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) { 290 vht_cap->vht_supported = false; 291 sdata_info(sdata, 292 "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n", 293 link_sta->sta->addr, link_sta->addr); 294 return; 295 } 296 297 /* finally set up the bandwidth */ 298 switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { 299 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: 300 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: 301 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 302 break; 303 default: 304 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 305 306 if (!(vht_cap->vht_mcs.tx_highest & 307 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) 308 break; 309 310 /* 311 * If this is non-zero, then it does support 160 MHz after all, 312 * in one form or the other. We don't distinguish here (or even 313 * above) between 160 and 80+80 yet. 314 */ 315 if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 316 link_sta->cur_max_bandwidth = 317 IEEE80211_STA_RX_BW_160; 318 } 319 320 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); 321 322 /* 323 * Work around the Cisco 9115 FW 17.3 bug by taking the min of 324 * both reported MPDU lengths. 325 */ 326 mpdu_len = vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK; 327 if (vht_cap_ie2) 328 mpdu_len = min_t(u32, mpdu_len, 329 le32_get_bits(vht_cap_ie2->vht_cap_info, 330 IEEE80211_VHT_CAP_MAX_MPDU_MASK)); 331 332 /* 333 * FIXME - should the amsdu len be per link? store per link 334 * and maintain a minimum? 335 */ 336 switch (mpdu_len) { 337 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 338 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; 339 break; 340 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 341 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; 342 break; 343 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: 344 default: 345 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; 346 break; 347 } 348 349 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta); 350 } 351 352 /* FIXME: move this to some better location - parses HE/EHT now */ 353 static enum ieee80211_sta_rx_bandwidth 354 __ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta, 355 struct cfg80211_chan_def *chandef) 356 { 357 unsigned int link_id = link_sta->link_id; 358 struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata; 359 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 360 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 361 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; 362 u32 cap_width; 363 364 if (he_cap->has_he) { 365 enum nl80211_band band; 366 u8 info; 367 368 if (chandef) { 369 band = chandef->chan->band; 370 } else { 371 struct ieee80211_bss_conf *link_conf; 372 373 rcu_read_lock(); 374 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]); 375 band = link_conf->chanreq.oper.chan->band; 376 rcu_read_unlock(); 377 } 378 379 if (eht_cap->has_eht && band == NL80211_BAND_6GHZ) { 380 info = eht_cap->eht_cap_elem.phy_cap_info[0]; 381 382 if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 383 return IEEE80211_STA_RX_BW_320; 384 } 385 386 info = he_cap->he_cap_elem.phy_cap_info[0]; 387 388 if (band == NL80211_BAND_2GHZ) { 389 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 390 return IEEE80211_STA_RX_BW_40; 391 return IEEE80211_STA_RX_BW_20; 392 } 393 394 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || 395 info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) 396 return IEEE80211_STA_RX_BW_160; 397 398 if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) 399 return IEEE80211_STA_RX_BW_80; 400 401 return IEEE80211_STA_RX_BW_20; 402 } 403 404 if (!vht_cap->vht_supported) 405 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 406 IEEE80211_STA_RX_BW_40 : 407 IEEE80211_STA_RX_BW_20; 408 409 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 410 411 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 412 cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 413 return IEEE80211_STA_RX_BW_160; 414 415 /* 416 * If this is non-zero, then it does support 160 MHz after all, 417 * in one form or the other. We don't distinguish here (or even 418 * above) between 160 and 80+80 yet. 419 */ 420 if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) 421 return IEEE80211_STA_RX_BW_160; 422 423 return IEEE80211_STA_RX_BW_80; 424 } 425 426 enum ieee80211_sta_rx_bandwidth 427 _ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta, 428 struct cfg80211_chan_def *chandef) 429 { 430 /* 431 * With RX OMI, also pretend that the STA's capability changed. 432 * Of course this isn't really true, it didn't change, only our 433 * RX capability was changed by notifying RX OMI to the STA. 434 * The purpose, however, is to save power, and that requires 435 * changing also transmissions to the AP and the chanctx. The 436 * transmissions depend on link_sta->bandwidth which is set in 437 * _ieee80211_sta_cur_vht_bw() below, but the chanctx depends 438 * on the result of this function which is also called by 439 * _ieee80211_sta_cur_vht_bw(), so we need to do that here as 440 * well. This is sufficient for the steady state, but during 441 * the transition we already need to change TX/RX separately, 442 * so _ieee80211_sta_cur_vht_bw() below applies the _tx one. 443 */ 444 return min(__ieee80211_sta_cap_rx_bw(link_sta, chandef), 445 link_sta->rx_omi_bw_rx); 446 } 447 448 enum nl80211_chan_width 449 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta) 450 { 451 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 452 u32 cap_width; 453 454 if (!vht_cap->vht_supported) { 455 if (!link_sta->pub->ht_cap.ht_supported) 456 return NL80211_CHAN_WIDTH_20_NOHT; 457 458 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 459 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 460 } 461 462 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 463 464 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 465 return NL80211_CHAN_WIDTH_160; 466 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 467 return NL80211_CHAN_WIDTH_80P80; 468 469 return NL80211_CHAN_WIDTH_80; 470 } 471 472 enum nl80211_chan_width 473 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta) 474 { 475 enum ieee80211_sta_rx_bandwidth cur_bw = 476 link_sta->pub->bandwidth; 477 struct ieee80211_sta_vht_cap *vht_cap = 478 &link_sta->pub->vht_cap; 479 u32 cap_width; 480 481 switch (cur_bw) { 482 case IEEE80211_STA_RX_BW_20: 483 if (!link_sta->pub->ht_cap.ht_supported) 484 return NL80211_CHAN_WIDTH_20_NOHT; 485 else 486 return NL80211_CHAN_WIDTH_20; 487 case IEEE80211_STA_RX_BW_40: 488 return NL80211_CHAN_WIDTH_40; 489 case IEEE80211_STA_RX_BW_80: 490 return NL80211_CHAN_WIDTH_80; 491 case IEEE80211_STA_RX_BW_160: 492 cap_width = 493 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 494 495 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 496 return NL80211_CHAN_WIDTH_160; 497 498 return NL80211_CHAN_WIDTH_80P80; 499 default: 500 return NL80211_CHAN_WIDTH_20; 501 } 502 } 503 504 /* FIXME: rename/move - this deals with everything not just VHT */ 505 enum ieee80211_sta_rx_bandwidth 506 _ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta, 507 struct cfg80211_chan_def *chandef) 508 { 509 struct sta_info *sta = link_sta->sta; 510 enum nl80211_chan_width bss_width; 511 enum ieee80211_sta_rx_bandwidth bw; 512 513 if (chandef) { 514 bss_width = chandef->width; 515 } else { 516 struct ieee80211_bss_conf *link_conf; 517 518 rcu_read_lock(); 519 link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]); 520 if (WARN_ON_ONCE(!link_conf)) { 521 rcu_read_unlock(); 522 return IEEE80211_STA_RX_BW_20; 523 } 524 bss_width = link_conf->chanreq.oper.width; 525 rcu_read_unlock(); 526 } 527 528 /* intentionally do not take rx_bw_omi_rx into account */ 529 bw = __ieee80211_sta_cap_rx_bw(link_sta, chandef); 530 bw = min(bw, link_sta->cur_max_bandwidth); 531 /* but do apply rx_omi_bw_tx */ 532 bw = min(bw, link_sta->rx_omi_bw_tx); 533 534 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 535 * IEEE80211-2016 specification makes higher bandwidth operation 536 * possible on the TDLS link if the peers have wider bandwidth 537 * capability. 538 * 539 * However, in this case, and only if the TDLS peer is authorized, 540 * limit to the tdls_chandef so that the configuration here isn't 541 * wider than what's actually requested on the channel context. 542 */ 543 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 544 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && 545 test_sta_flag(sta, WLAN_STA_AUTHORIZED) && 546 sta->tdls_chandef.chan) 547 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); 548 else 549 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 550 551 return bw; 552 } 553 554 void ieee80211_sta_init_nss(struct link_sta_info *link_sta) 555 { 556 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss; 557 bool support_160; 558 559 if (link_sta->pub->eht_cap.has_eht) { 560 int i; 561 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp; 562 563 /* get the max nss for EHT over all possible bandwidths and mcs */ 564 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++) 565 eht_rx_nss = max_t(u8, eht_rx_nss, 566 u8_get_bits(rx_nss_mcs[i], 567 IEEE80211_EHT_MCS_NSS_RX)); 568 } 569 570 if (link_sta->pub->he_cap.has_he) { 571 int i; 572 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 573 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 574 u16 mcs_160_map = 575 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 576 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 577 578 for (i = 7; i >= 0; i--) { 579 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 580 581 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 582 rx_mcs_160 = i + 1; 583 break; 584 } 585 } 586 for (i = 7; i >= 0; i--) { 587 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 588 589 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 590 rx_mcs_80 = i + 1; 591 break; 592 } 593 } 594 595 support_160 = he_cap->he_cap_elem.phy_cap_info[0] & 596 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 597 598 if (support_160) 599 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 600 else 601 he_rx_nss = rx_mcs_80; 602 } 603 604 if (link_sta->pub->ht_cap.ht_supported) { 605 if (link_sta->pub->ht_cap.mcs.rx_mask[0]) 606 ht_rx_nss++; 607 if (link_sta->pub->ht_cap.mcs.rx_mask[1]) 608 ht_rx_nss++; 609 if (link_sta->pub->ht_cap.mcs.rx_mask[2]) 610 ht_rx_nss++; 611 if (link_sta->pub->ht_cap.mcs.rx_mask[3]) 612 ht_rx_nss++; 613 /* FIXME: consider rx_highest? */ 614 } 615 616 if (link_sta->pub->vht_cap.vht_supported) { 617 int i; 618 u16 rx_mcs_map; 619 620 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map); 621 622 for (i = 7; i >= 0; i--) { 623 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 624 625 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 626 vht_rx_nss = i + 1; 627 break; 628 } 629 } 630 /* FIXME: consider rx_highest? */ 631 } 632 633 rx_nss = max(vht_rx_nss, ht_rx_nss); 634 rx_nss = max(he_rx_nss, rx_nss); 635 rx_nss = max(eht_rx_nss, rx_nss); 636 rx_nss = max_t(u8, 1, rx_nss); 637 link_sta->capa_nss = rx_nss; 638 639 /* that shouldn't be set yet, but we can handle it anyway */ 640 if (link_sta->op_mode_nss) 641 link_sta->pub->rx_nss = 642 min_t(u8, rx_nss, link_sta->op_mode_nss); 643 else 644 link_sta->pub->rx_nss = rx_nss; 645 } 646 647 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 648 struct link_sta_info *link_sta, 649 u8 opmode, enum nl80211_band band) 650 { 651 enum ieee80211_sta_rx_bandwidth new_bw; 652 struct sta_opmode_info sta_opmode = {}; 653 u32 changed = 0; 654 u8 nss; 655 656 /* ignore - no support for BF yet */ 657 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 658 return 0; 659 660 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 661 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 662 nss += 1; 663 664 if (link_sta->op_mode_nss != nss) { 665 if (nss <= link_sta->capa_nss) { 666 link_sta->op_mode_nss = nss; 667 668 if (nss != link_sta->pub->rx_nss) { 669 link_sta->pub->rx_nss = nss; 670 changed |= IEEE80211_RC_NSS_CHANGED; 671 sta_opmode.rx_nss = link_sta->pub->rx_nss; 672 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 673 } 674 } else { 675 pr_warn_ratelimited("Ignoring NSS change in VHT Operating Mode Notification from %pM with invalid nss %d", 676 link_sta->pub->addr, nss); 677 } 678 } 679 680 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 681 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 682 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 683 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 684 break; 685 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 686 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 687 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 688 break; 689 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 690 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 691 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 692 else 693 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 694 break; 695 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 696 /* legacy only, no longer used by newer spec */ 697 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 698 break; 699 } 700 701 new_bw = ieee80211_sta_cur_vht_bw(link_sta); 702 if (new_bw != link_sta->pub->bandwidth) { 703 link_sta->pub->bandwidth = new_bw; 704 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta); 705 changed |= IEEE80211_RC_BW_CHANGED; 706 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 707 } 708 709 if (sta_opmode.changed) 710 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr, 711 &sta_opmode, GFP_KERNEL); 712 713 return changed; 714 } 715 716 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 717 struct ieee80211_link_data *link, 718 struct ieee80211_mgmt *mgmt) 719 { 720 struct ieee80211_bss_conf *link_conf = link->conf; 721 722 if (!link_conf->mu_mimo_owner) 723 return; 724 725 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 726 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 727 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 728 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 729 return; 730 731 memcpy(link_conf->mu_group.membership, 732 mgmt->u.action.u.vht_group_notif.membership, 733 WLAN_MEMBERSHIP_LEN); 734 memcpy(link_conf->mu_group.position, 735 mgmt->u.action.u.vht_group_notif.position, 736 WLAN_USER_POSITION_LEN); 737 738 ieee80211_link_info_change_notify(sdata, link, 739 BSS_CHANGED_MU_GROUPS); 740 } 741 742 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id, 743 const u8 *membership, const u8 *position) 744 { 745 struct ieee80211_bss_conf *link_conf; 746 747 rcu_read_lock(); 748 link_conf = rcu_dereference(vif->link_conf[link_id]); 749 750 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) { 751 memcpy(link_conf->mu_group.membership, membership, 752 WLAN_MEMBERSHIP_LEN); 753 memcpy(link_conf->mu_group.position, position, 754 WLAN_USER_POSITION_LEN); 755 } 756 rcu_read_unlock(); 757 } 758 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 759 760 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 761 struct link_sta_info *link_sta, 762 u8 opmode, enum nl80211_band band) 763 { 764 struct ieee80211_local *local = sdata->local; 765 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 766 767 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta, 768 opmode, band); 769 770 if (changed > 0) { 771 ieee80211_recalc_min_chandef(sdata, link_sta->link_id); 772 rate_control_rate_update(local, sband, link_sta, changed); 773 } 774 } 775 776 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 777 u16 vht_mask[NL80211_VHT_NSS_MAX]) 778 { 779 int i; 780 u16 mask, cap = le16_to_cpu(vht_cap); 781 782 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 783 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 784 switch (mask) { 785 case IEEE80211_VHT_MCS_SUPPORT_0_7: 786 vht_mask[i] = 0x00FF; 787 break; 788 case IEEE80211_VHT_MCS_SUPPORT_0_8: 789 vht_mask[i] = 0x01FF; 790 break; 791 case IEEE80211_VHT_MCS_SUPPORT_0_9: 792 vht_mask[i] = 0x03FF; 793 break; 794 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 795 default: 796 vht_mask[i] = 0; 797 break; 798 } 799 } 800 } 801