1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HE handling 4 * 5 * Copyright(c) 2017 Intel Deutschland GmbH 6 * Copyright(c) 2019-2025 Intel Corporation 7 */ 8 9 #include "ieee80211_i.h" 10 #include "rate.h" 11 12 static void 13 ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa, 14 struct link_sta_info *link_sta) 15 { 16 struct sta_info *sta = link_sta->sta; 17 enum ieee80211_smps_mode smps_mode; 18 19 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 20 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 21 switch (le16_get_bits(he_6ghz_capa->capa, 22 IEEE80211_HE_6GHZ_CAP_SM_PS)) { 23 case WLAN_HT_CAP_SM_PS_INVALID: 24 case WLAN_HT_CAP_SM_PS_STATIC: 25 smps_mode = IEEE80211_SMPS_STATIC; 26 break; 27 case WLAN_HT_CAP_SM_PS_DYNAMIC: 28 smps_mode = IEEE80211_SMPS_DYNAMIC; 29 break; 30 case WLAN_HT_CAP_SM_PS_DISABLED: 31 smps_mode = IEEE80211_SMPS_OFF; 32 break; 33 } 34 35 link_sta->pub->smps_mode = smps_mode; 36 } else { 37 link_sta->pub->smps_mode = IEEE80211_SMPS_OFF; 38 } 39 40 switch (le16_get_bits(he_6ghz_capa->capa, 41 IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) { 42 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 43 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; 44 break; 45 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 46 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; 47 break; 48 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: 49 default: 50 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; 51 break; 52 } 53 54 ieee80211_sta_recalc_aggregates(&sta->sta); 55 56 link_sta->pub->he_6ghz_capa = *he_6ghz_capa; 57 } 58 59 static void ieee80211_he_mcs_disable(__le16 *he_mcs) 60 { 61 u32 i; 62 63 for (i = 0; i < 8; i++) 64 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2); 65 } 66 67 static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx, 68 __le16 *he_own_tx, __le16 *he_peer_tx) 69 { 70 u32 i; 71 u16 own_rx, own_tx, peer_rx, peer_tx; 72 73 for (i = 0; i < 8; i++) { 74 own_rx = le16_to_cpu(*he_own_rx); 75 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED; 76 77 own_tx = le16_to_cpu(*he_own_tx); 78 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED; 79 80 peer_rx = le16_to_cpu(*he_peer_rx); 81 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED; 82 83 peer_tx = le16_to_cpu(*he_peer_tx); 84 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED; 85 86 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) { 87 if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED) 88 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED; 89 else if (own_rx < peer_tx) 90 peer_tx = own_rx; 91 } 92 93 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) { 94 if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED) 95 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED; 96 else if (own_tx < peer_rx) 97 peer_rx = own_tx; 98 } 99 100 *he_peer_rx &= 101 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2); 102 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2); 103 104 *he_peer_tx &= 105 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2); 106 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2); 107 } 108 } 109 110 void 111 _ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata, 112 const struct ieee80211_sta_he_cap *own_he_cap_ptr, 113 const u8 *he_cap_ie, u8 he_cap_len, 114 const struct ieee80211_he_6ghz_capa *he_6ghz_capa, 115 struct link_sta_info *link_sta) 116 { 117 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap; 118 struct ieee80211_sta_he_cap own_he_cap; 119 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie; 120 u8 he_ppe_size; 121 u8 mcs_nss_size; 122 u8 he_total_size; 123 bool own_160, peer_160, own_80p80, peer_80p80; 124 125 memset(he_cap, 0, sizeof(*he_cap)); 126 127 if (!he_cap_ie || !own_he_cap_ptr || !own_he_cap_ptr->has_he) 128 return; 129 130 own_he_cap = *own_he_cap_ptr; 131 132 /* Make sure size is OK */ 133 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem); 134 he_ppe_size = 135 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) + 136 mcs_nss_size], 137 he_cap_ie_elem->phy_cap_info); 138 he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size + 139 he_ppe_size; 140 if (he_cap_len < he_total_size) 141 return; 142 143 memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem)); 144 145 /* HE Tx/Rx HE MCS NSS Support Field */ 146 memcpy(&he_cap->he_mcs_nss_supp, 147 &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size); 148 149 /* Check if there are (optional) PPE Thresholds */ 150 if (he_cap->he_cap_elem.phy_cap_info[6] & 151 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) 152 memcpy(he_cap->ppe_thres, 153 &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size], 154 he_ppe_size); 155 156 he_cap->has_he = true; 157 158 link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta); 159 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); 160 161 if (he_6ghz_capa) 162 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta); 163 164 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80, 165 &he_cap->he_mcs_nss_supp.rx_mcs_80, 166 &own_he_cap.he_mcs_nss_supp.tx_mcs_80, 167 &he_cap->he_mcs_nss_supp.tx_mcs_80); 168 169 own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] & 170 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 171 peer_160 = he_cap->he_cap_elem.phy_cap_info[0] & 172 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 173 174 if (peer_160 && own_160) { 175 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160, 176 &he_cap->he_mcs_nss_supp.rx_mcs_160, 177 &own_he_cap.he_mcs_nss_supp.tx_mcs_160, 178 &he_cap->he_mcs_nss_supp.tx_mcs_160); 179 } else if (peer_160 && !own_160) { 180 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160); 181 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160); 182 he_cap->he_cap_elem.phy_cap_info[0] &= 183 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 184 } 185 186 own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] & 187 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 188 peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] & 189 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 190 191 if (peer_80p80 && own_80p80) { 192 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80, 193 &he_cap->he_mcs_nss_supp.rx_mcs_80p80, 194 &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80, 195 &he_cap->he_mcs_nss_supp.tx_mcs_80p80); 196 } else if (peer_80p80 && !own_80p80) { 197 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80); 198 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80); 199 he_cap->he_cap_elem.phy_cap_info[0] &= 200 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 201 } 202 } 203 204 void 205 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata, 206 struct ieee80211_supported_band *sband, 207 const u8 *he_cap_ie, u8 he_cap_len, 208 const struct ieee80211_he_6ghz_capa *he_6ghz_capa, 209 struct link_sta_info *link_sta) 210 { 211 const struct ieee80211_sta_he_cap *own_he_cap = 212 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 213 214 _ieee80211_he_cap_ie_to_sta_he_cap(sdata, own_he_cap, he_cap_ie, 215 he_cap_len, 216 (sband->band == NL80211_BAND_6GHZ) ? 217 he_6ghz_capa : NULL, 218 link_sta); 219 } 220 221 void 222 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif, 223 const struct ieee80211_he_operation *he_op_ie) 224 { 225 memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper)); 226 if (!he_op_ie) 227 return; 228 229 vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params); 230 vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set); 231 } 232 233 void 234 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif, 235 const struct ieee80211_he_spr *he_spr_ie_elem) 236 { 237 struct ieee80211_he_obss_pd *he_obss_pd = 238 &vif->bss_conf.he_obss_pd; 239 const u8 *data; 240 241 memset(he_obss_pd, 0, sizeof(*he_obss_pd)); 242 243 if (!he_spr_ie_elem) 244 return; 245 246 he_obss_pd->sr_ctrl = he_spr_ie_elem->he_sr_control; 247 data = he_spr_ie_elem->optional; 248 249 if (he_spr_ie_elem->he_sr_control & 250 IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT) 251 he_obss_pd->non_srg_max_offset = *data++; 252 253 if (he_spr_ie_elem->he_sr_control & 254 IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) { 255 he_obss_pd->min_offset = *data++; 256 he_obss_pd->max_offset = *data++; 257 memcpy(he_obss_pd->bss_color_bitmap, data, 8); 258 data += 8; 259 memcpy(he_obss_pd->partial_bssid_bitmap, data, 8); 260 he_obss_pd->enable = true; 261 } 262 } 263 264 static void ieee80211_link_sta_rc_update_omi(struct ieee80211_link_data *link, 265 struct link_sta_info *link_sta) 266 { 267 struct ieee80211_sub_if_data *sdata = link->sdata; 268 struct ieee80211_supported_band *sband; 269 enum ieee80211_sta_rx_bandwidth new_bw; 270 enum nl80211_band band; 271 272 band = link->conf->chanreq.oper.chan->band; 273 sband = sdata->local->hw.wiphy->bands[band]; 274 275 new_bw = ieee80211_sta_cur_vht_bw(link_sta); 276 if (link_sta->pub->bandwidth == new_bw) 277 return; 278 279 link_sta->pub->bandwidth = new_bw; 280 rate_control_rate_update(sdata->local, sband, link_sta, 281 IEEE80211_RC_BW_CHANGED); 282 } 283 284 bool ieee80211_prepare_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta, 285 enum ieee80211_sta_rx_bandwidth bw) 286 { 287 struct sta_info *sta = container_of(pub_link_sta->sta, 288 struct sta_info, sta); 289 struct ieee80211_local *local = sta->sdata->local; 290 struct link_sta_info *link_sta = 291 sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata); 292 struct ieee80211_link_data *link = 293 sdata_dereference(sta->sdata->link[pub_link_sta->link_id], 294 sta->sdata); 295 struct ieee80211_chanctx_conf *conf; 296 struct ieee80211_chanctx *chanctx; 297 bool ret; 298 299 if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta)) 300 return false; 301 302 conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata); 303 if (WARN_ON(!conf)) 304 return false; 305 306 trace_api_prepare_rx_omi_bw(local, sta->sdata, link_sta, bw); 307 308 chanctx = container_of(conf, typeof(*chanctx), conf); 309 310 if (link_sta->rx_omi_bw_staging == bw) { 311 ret = false; 312 goto trace; 313 } 314 315 /* must call this API in pairs */ 316 if (WARN_ON(link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging || 317 link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging)) { 318 ret = false; 319 goto trace; 320 } 321 322 if (bw < link_sta->rx_omi_bw_staging) { 323 link_sta->rx_omi_bw_tx = bw; 324 ieee80211_link_sta_rc_update_omi(link, link_sta); 325 } else { 326 link_sta->rx_omi_bw_rx = bw; 327 ieee80211_recalc_chanctx_min_def(local, chanctx); 328 } 329 330 link_sta->rx_omi_bw_staging = bw; 331 ret = true; 332 trace: 333 trace_api_return_bool(local, ret); 334 return ret; 335 } 336 EXPORT_SYMBOL_GPL(ieee80211_prepare_rx_omi_bw); 337 338 void ieee80211_finalize_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta) 339 { 340 struct sta_info *sta = container_of(pub_link_sta->sta, 341 struct sta_info, sta); 342 struct ieee80211_local *local = sta->sdata->local; 343 struct link_sta_info *link_sta = 344 sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata); 345 struct ieee80211_link_data *link = 346 sdata_dereference(sta->sdata->link[pub_link_sta->link_id], 347 sta->sdata); 348 struct ieee80211_chanctx_conf *conf; 349 struct ieee80211_chanctx *chanctx; 350 351 if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta)) 352 return; 353 354 conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata); 355 if (WARN_ON(!conf)) 356 return; 357 358 trace_api_finalize_rx_omi_bw(local, sta->sdata, link_sta); 359 360 chanctx = container_of(conf, typeof(*chanctx), conf); 361 362 if (link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging) { 363 /* rate control in finalize only when widening bandwidth */ 364 WARN_ON(link_sta->rx_omi_bw_tx > link_sta->rx_omi_bw_staging); 365 link_sta->rx_omi_bw_tx = link_sta->rx_omi_bw_staging; 366 ieee80211_link_sta_rc_update_omi(link, link_sta); 367 } 368 369 if (link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging) { 370 /* channel context in finalize only when narrowing bandwidth */ 371 WARN_ON(link_sta->rx_omi_bw_rx < link_sta->rx_omi_bw_staging); 372 link_sta->rx_omi_bw_rx = link_sta->rx_omi_bw_staging; 373 ieee80211_recalc_chanctx_min_def(local, chanctx); 374 } 375 376 trace_api_return_void(local); 377 } 378 EXPORT_SYMBOL_GPL(ieee80211_finalize_rx_omi_bw); 379