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 * spacial 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 spactial 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 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 nl80211_chan_width 427 ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta) 428 { 429 struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap; 430 u32 cap_width; 431 432 if (!vht_cap->vht_supported) { 433 if (!link_sta->pub->ht_cap.ht_supported) 434 return NL80211_CHAN_WIDTH_20_NOHT; 435 436 return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 437 NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; 438 } 439 440 cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 441 442 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 443 return NL80211_CHAN_WIDTH_160; 444 else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 445 return NL80211_CHAN_WIDTH_80P80; 446 447 return NL80211_CHAN_WIDTH_80; 448 } 449 450 enum nl80211_chan_width 451 ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta) 452 { 453 enum ieee80211_sta_rx_bandwidth cur_bw = 454 link_sta->pub->bandwidth; 455 struct ieee80211_sta_vht_cap *vht_cap = 456 &link_sta->pub->vht_cap; 457 u32 cap_width; 458 459 switch (cur_bw) { 460 case IEEE80211_STA_RX_BW_20: 461 if (!link_sta->pub->ht_cap.ht_supported) 462 return NL80211_CHAN_WIDTH_20_NOHT; 463 else 464 return NL80211_CHAN_WIDTH_20; 465 case IEEE80211_STA_RX_BW_40: 466 return NL80211_CHAN_WIDTH_40; 467 case IEEE80211_STA_RX_BW_80: 468 return NL80211_CHAN_WIDTH_80; 469 case IEEE80211_STA_RX_BW_160: 470 cap_width = 471 vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 472 473 if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) 474 return NL80211_CHAN_WIDTH_160; 475 476 return NL80211_CHAN_WIDTH_80P80; 477 default: 478 return NL80211_CHAN_WIDTH_20; 479 } 480 } 481 482 enum ieee80211_sta_rx_bandwidth 483 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) 484 { 485 switch (width) { 486 case NL80211_CHAN_WIDTH_20_NOHT: 487 case NL80211_CHAN_WIDTH_20: 488 return IEEE80211_STA_RX_BW_20; 489 case NL80211_CHAN_WIDTH_40: 490 return IEEE80211_STA_RX_BW_40; 491 case NL80211_CHAN_WIDTH_80: 492 return IEEE80211_STA_RX_BW_80; 493 case NL80211_CHAN_WIDTH_160: 494 case NL80211_CHAN_WIDTH_80P80: 495 return IEEE80211_STA_RX_BW_160; 496 case NL80211_CHAN_WIDTH_320: 497 return IEEE80211_STA_RX_BW_320; 498 default: 499 WARN_ON_ONCE(1); 500 return IEEE80211_STA_RX_BW_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 bw = _ieee80211_sta_cap_rx_bw(link_sta, chandef); 529 bw = min(bw, link_sta->cur_max_bandwidth); 530 531 /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of 532 * IEEE80211-2016 specification makes higher bandwidth operation 533 * possible on the TDLS link if the peers have wider bandwidth 534 * capability. 535 * 536 * However, in this case, and only if the TDLS peer is authorized, 537 * limit to the tdls_chandef so that the configuration here isn't 538 * wider than what's actually requested on the channel context. 539 */ 540 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && 541 test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && 542 test_sta_flag(sta, WLAN_STA_AUTHORIZED) && 543 sta->tdls_chandef.chan) 544 bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); 545 else 546 bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); 547 548 return bw; 549 } 550 551 void ieee80211_sta_init_nss(struct link_sta_info *link_sta) 552 { 553 u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss; 554 bool support_160; 555 556 if (link_sta->pub->eht_cap.has_eht) { 557 int i; 558 const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp; 559 560 /* get the max nss for EHT over all possible bandwidths and mcs */ 561 for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++) 562 eht_rx_nss = max_t(u8, eht_rx_nss, 563 u8_get_bits(rx_nss_mcs[i], 564 IEEE80211_EHT_MCS_NSS_RX)); 565 } 566 567 if (link_sta->pub->he_cap.has_he) { 568 int i; 569 u8 rx_mcs_80 = 0, rx_mcs_160 = 0; 570 const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 571 u16 mcs_160_map = 572 le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 573 u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 574 575 for (i = 7; i >= 0; i--) { 576 u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; 577 578 if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 579 rx_mcs_160 = i + 1; 580 break; 581 } 582 } 583 for (i = 7; i >= 0; i--) { 584 u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; 585 586 if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) { 587 rx_mcs_80 = i + 1; 588 break; 589 } 590 } 591 592 support_160 = he_cap->he_cap_elem.phy_cap_info[0] & 593 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 594 595 if (support_160) 596 he_rx_nss = min(rx_mcs_80, rx_mcs_160); 597 else 598 he_rx_nss = rx_mcs_80; 599 } 600 601 if (link_sta->pub->ht_cap.ht_supported) { 602 if (link_sta->pub->ht_cap.mcs.rx_mask[0]) 603 ht_rx_nss++; 604 if (link_sta->pub->ht_cap.mcs.rx_mask[1]) 605 ht_rx_nss++; 606 if (link_sta->pub->ht_cap.mcs.rx_mask[2]) 607 ht_rx_nss++; 608 if (link_sta->pub->ht_cap.mcs.rx_mask[3]) 609 ht_rx_nss++; 610 /* FIXME: consider rx_highest? */ 611 } 612 613 if (link_sta->pub->vht_cap.vht_supported) { 614 int i; 615 u16 rx_mcs_map; 616 617 rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map); 618 619 for (i = 7; i >= 0; i--) { 620 u8 mcs = (rx_mcs_map >> (2 * i)) & 3; 621 622 if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 623 vht_rx_nss = i + 1; 624 break; 625 } 626 } 627 /* FIXME: consider rx_highest? */ 628 } 629 630 rx_nss = max(vht_rx_nss, ht_rx_nss); 631 rx_nss = max(he_rx_nss, rx_nss); 632 rx_nss = max(eht_rx_nss, rx_nss); 633 rx_nss = max_t(u8, 1, rx_nss); 634 link_sta->capa_nss = rx_nss; 635 636 /* that shouldn't be set yet, but we can handle it anyway */ 637 if (link_sta->op_mode_nss) 638 link_sta->pub->rx_nss = 639 min_t(u8, rx_nss, link_sta->op_mode_nss); 640 else 641 link_sta->pub->rx_nss = rx_nss; 642 } 643 644 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 645 struct link_sta_info *link_sta, 646 u8 opmode, enum nl80211_band band) 647 { 648 enum ieee80211_sta_rx_bandwidth new_bw; 649 struct sta_opmode_info sta_opmode = {}; 650 u32 changed = 0; 651 u8 nss; 652 653 /* ignore - no support for BF yet */ 654 if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) 655 return 0; 656 657 nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 658 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 659 nss += 1; 660 661 if (link_sta->op_mode_nss != nss) { 662 if (nss <= link_sta->capa_nss) { 663 link_sta->op_mode_nss = nss; 664 665 if (nss != link_sta->pub->rx_nss) { 666 link_sta->pub->rx_nss = nss; 667 changed |= IEEE80211_RC_NSS_CHANGED; 668 sta_opmode.rx_nss = link_sta->pub->rx_nss; 669 sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; 670 } 671 } else { 672 pr_warn_ratelimited("Ignoring NSS change in VHT Operating Mode Notification from %pM with invalid nss %d", 673 link_sta->pub->addr, nss); 674 } 675 } 676 677 switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { 678 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: 679 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 680 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; 681 break; 682 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: 683 /* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ 684 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; 685 break; 686 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: 687 if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) 688 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 689 else 690 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; 691 break; 692 case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: 693 /* legacy only, no longer used by newer spec */ 694 link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; 695 break; 696 } 697 698 new_bw = ieee80211_sta_cur_vht_bw(link_sta); 699 if (new_bw != link_sta->pub->bandwidth) { 700 link_sta->pub->bandwidth = new_bw; 701 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta); 702 changed |= IEEE80211_RC_BW_CHANGED; 703 sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; 704 } 705 706 if (sta_opmode.changed) 707 cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr, 708 &sta_opmode, GFP_KERNEL); 709 710 return changed; 711 } 712 713 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, 714 struct ieee80211_link_data *link, 715 struct ieee80211_mgmt *mgmt) 716 { 717 struct ieee80211_bss_conf *link_conf = link->conf; 718 719 if (!link_conf->mu_mimo_owner) 720 return; 721 722 if (!memcmp(mgmt->u.action.u.vht_group_notif.position, 723 link_conf->mu_group.position, WLAN_USER_POSITION_LEN) && 724 !memcmp(mgmt->u.action.u.vht_group_notif.membership, 725 link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) 726 return; 727 728 memcpy(link_conf->mu_group.membership, 729 mgmt->u.action.u.vht_group_notif.membership, 730 WLAN_MEMBERSHIP_LEN); 731 memcpy(link_conf->mu_group.position, 732 mgmt->u.action.u.vht_group_notif.position, 733 WLAN_USER_POSITION_LEN); 734 735 ieee80211_link_info_change_notify(sdata, link, 736 BSS_CHANGED_MU_GROUPS); 737 } 738 739 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id, 740 const u8 *membership, const u8 *position) 741 { 742 struct ieee80211_bss_conf *link_conf; 743 744 rcu_read_lock(); 745 link_conf = rcu_dereference(vif->link_conf[link_id]); 746 747 if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) { 748 memcpy(link_conf->mu_group.membership, membership, 749 WLAN_MEMBERSHIP_LEN); 750 memcpy(link_conf->mu_group.position, position, 751 WLAN_USER_POSITION_LEN); 752 } 753 rcu_read_unlock(); 754 } 755 EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); 756 757 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, 758 struct link_sta_info *link_sta, 759 u8 opmode, enum nl80211_band band) 760 { 761 struct ieee80211_local *local = sdata->local; 762 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; 763 764 u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta, 765 opmode, band); 766 767 if (changed > 0) { 768 ieee80211_recalc_min_chandef(sdata, link_sta->link_id); 769 rate_control_rate_update(local, sband, link_sta->sta, 770 link_sta->link_id, changed); 771 } 772 } 773 774 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, 775 u16 vht_mask[NL80211_VHT_NSS_MAX]) 776 { 777 int i; 778 u16 mask, cap = le16_to_cpu(vht_cap); 779 780 for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { 781 mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; 782 switch (mask) { 783 case IEEE80211_VHT_MCS_SUPPORT_0_7: 784 vht_mask[i] = 0x00FF; 785 break; 786 case IEEE80211_VHT_MCS_SUPPORT_0_8: 787 vht_mask[i] = 0x01FF; 788 break; 789 case IEEE80211_VHT_MCS_SUPPORT_0_9: 790 vht_mask[i] = 0x03FF; 791 break; 792 case IEEE80211_VHT_MCS_NOT_SUPPORTED: 793 default: 794 vht_mask[i] = 0; 795 break; 796 } 797 } 798 } 799