1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2017 Intel Deutschland GmbH 4 * Copyright (C) 2018-2021 Intel Corporation 5 */ 6 #include "rs.h" 7 #include "fw-api.h" 8 #include "sta.h" 9 #include "iwl-op-mode.h" 10 #include "mvm.h" 11 12 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta) 13 { 14 switch (sta->bandwidth) { 15 case IEEE80211_STA_RX_BW_160: 16 return IWL_TLC_MNG_CH_WIDTH_160MHZ; 17 case IEEE80211_STA_RX_BW_80: 18 return IWL_TLC_MNG_CH_WIDTH_80MHZ; 19 case IEEE80211_STA_RX_BW_40: 20 return IWL_TLC_MNG_CH_WIDTH_40MHZ; 21 case IEEE80211_STA_RX_BW_20: 22 default: 23 return IWL_TLC_MNG_CH_WIDTH_20MHZ; 24 } 25 } 26 27 static u8 rs_fw_set_active_chains(u8 chains) 28 { 29 u8 fw_chains = 0; 30 31 if (chains & ANT_A) 32 fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK; 33 if (chains & ANT_B) 34 fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK; 35 if (chains & ANT_C) 36 WARN(false, 37 "tlc offload doesn't support antenna C. chains: 0x%x\n", 38 chains); 39 40 return fw_chains; 41 } 42 43 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta) 44 { 45 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 46 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 47 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 48 u8 supp = 0; 49 50 if (he_cap->has_he) 51 return 0; 52 53 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) 54 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); 55 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) 56 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); 57 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) 58 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); 59 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) 60 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); 61 62 return supp; 63 } 64 65 static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm, 66 struct ieee80211_sta *sta, 67 struct ieee80211_supported_band *sband) 68 { 69 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 70 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 71 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 72 bool vht_ena = vht_cap->vht_supported; 73 u16 flags = 0; 74 75 /* get STBC flags */ 76 if (mvm->cfg->ht_params->stbc && 77 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) { 78 if (he_cap->has_he && he_cap->he_cap_elem.phy_cap_info[2] & 79 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ) 80 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 81 else if (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK) 82 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 83 else if (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC) 84 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 85 } 86 87 if (mvm->cfg->ht_params->ldpc && 88 ((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) || 89 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) 90 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 91 92 /* consider LDPC support in case of HE */ 93 if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] & 94 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)) 95 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 96 97 if (sband->iftype_data && sband->iftype_data->he_cap.has_he && 98 !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] & 99 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)) 100 flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 101 102 if (he_cap->has_he && 103 (he_cap->he_cap_elem.phy_cap_info[3] & 104 IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK)) 105 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK; 106 107 return flags; 108 } 109 110 static 111 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, 112 int nss) 113 { 114 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & 115 (0x3 << (2 * (nss - 1))); 116 rx_mcs >>= (2 * (nss - 1)); 117 118 switch (rx_mcs) { 119 case IEEE80211_VHT_MCS_SUPPORT_0_7: 120 return IWL_TLC_MNG_HT_RATE_MCS7; 121 case IEEE80211_VHT_MCS_SUPPORT_0_8: 122 return IWL_TLC_MNG_HT_RATE_MCS8; 123 case IEEE80211_VHT_MCS_SUPPORT_0_9: 124 return IWL_TLC_MNG_HT_RATE_MCS9; 125 default: 126 WARN_ON_ONCE(1); 127 break; 128 } 129 130 return 0; 131 } 132 133 static void 134 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, 135 const struct ieee80211_sta_vht_cap *vht_cap, 136 struct iwl_tlc_config_cmd *cmd) 137 { 138 u16 supp; 139 int i, highest_mcs; 140 u8 max_nss = sta->rx_nss; 141 struct ieee80211_vht_cap ieee_vht_cap = { 142 .vht_cap_info = cpu_to_le32(vht_cap->cap), 143 .supp_mcs = vht_cap->vht_mcs, 144 }; 145 146 /* the station support only a single receive chain */ 147 if (sta->smps_mode == IEEE80211_SMPS_STATIC) 148 max_nss = 1; 149 150 for (i = 0; i < max_nss && i < IWL_TLC_NSS_MAX; i++) { 151 int nss = i + 1; 152 153 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, nss); 154 if (!highest_mcs) 155 continue; 156 157 supp = BIT(highest_mcs + 1) - 1; 158 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) 159 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); 160 161 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = cpu_to_le16(supp); 162 /* 163 * Check if VHT extended NSS indicates that the bandwidth/NSS 164 * configuration is supported - only for MCS 0 since we already 165 * decoded the MCS bits anyway ourselves. 166 */ 167 if (sta->bandwidth == IEEE80211_STA_RX_BW_160 && 168 ieee80211_get_vht_max_nss(&ieee_vht_cap, 169 IEEE80211_VHT_CHANWIDTH_160MHZ, 170 0, true, nss) >= nss) 171 cmd->ht_rates[i][IWL_TLC_HT_BW_160] = 172 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160]; 173 } 174 } 175 176 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs) 177 { 178 switch (mcs) { 179 case IEEE80211_HE_MCS_SUPPORT_0_7: 180 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1; 181 case IEEE80211_HE_MCS_SUPPORT_0_9: 182 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1; 183 case IEEE80211_HE_MCS_SUPPORT_0_11: 184 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1; 185 case IEEE80211_HE_MCS_NOT_SUPPORTED: 186 return 0; 187 } 188 189 WARN(1, "invalid HE MCS %d\n", mcs); 190 return 0; 191 } 192 193 static void 194 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta, 195 struct ieee80211_supported_band *sband, 196 struct iwl_tlc_config_cmd *cmd) 197 { 198 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 199 u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 200 u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 201 u16 tx_mcs_80 = 202 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80); 203 u16 tx_mcs_160 = 204 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160); 205 int i; 206 u8 nss = sta->rx_nss; 207 208 /* the station support only a single receive chain */ 209 if (sta->smps_mode == IEEE80211_SMPS_STATIC) 210 nss = 1; 211 212 for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) { 213 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3; 214 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3; 215 u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3; 216 u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3; 217 218 /* If one side doesn't support - mark both as not supporting */ 219 if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED || 220 _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) { 221 _mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; 222 _tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; 223 } 224 if (_mcs_80 > _tx_mcs_80) 225 _mcs_80 = _tx_mcs_80; 226 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = 227 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80)); 228 229 /* If one side doesn't support - mark both as not supporting */ 230 if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED || 231 _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) { 232 _mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; 233 _tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; 234 } 235 if (_mcs_160 > _tx_mcs_160) 236 _mcs_160 = _tx_mcs_160; 237 cmd->ht_rates[i][IWL_TLC_HT_BW_160] = 238 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160)); 239 } 240 } 241 242 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, 243 struct ieee80211_supported_band *sband, 244 struct iwl_tlc_config_cmd *cmd) 245 { 246 int i; 247 u16 supp = 0; 248 unsigned long tmp; /* must be unsigned long for for_each_set_bit */ 249 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 250 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 251 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 252 253 /* non HT rates */ 254 tmp = sta->supp_rates[sband->band]; 255 for_each_set_bit(i, &tmp, BITS_PER_LONG) 256 supp |= BIT(sband->bitrates[i].hw_value); 257 258 cmd->non_ht_rates = cpu_to_le16(supp); 259 cmd->mode = IWL_TLC_MNG_MODE_NON_HT; 260 261 /* HT/VHT rates */ 262 if (he_cap->has_he) { 263 cmd->mode = IWL_TLC_MNG_MODE_HE; 264 rs_fw_he_set_enabled_rates(sta, sband, cmd); 265 } else if (vht_cap->vht_supported) { 266 cmd->mode = IWL_TLC_MNG_MODE_VHT; 267 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); 268 } else if (ht_cap->ht_supported) { 269 cmd->mode = IWL_TLC_MNG_MODE_HT; 270 cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] = 271 cpu_to_le16(ht_cap->mcs.rx_mask[0]); 272 273 /* the station support only a single receive chain */ 274 if (sta->smps_mode == IEEE80211_SMPS_STATIC) 275 cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] = 276 0; 277 else 278 cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] = 279 cpu_to_le16(ht_cap->mcs.rx_mask[1]); 280 } 281 } 282 283 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 284 struct iwl_rx_cmd_buffer *rxb) 285 { 286 struct iwl_rx_packet *pkt = rxb_addr(rxb); 287 struct iwl_tlc_update_notif *notif; 288 struct ieee80211_sta *sta; 289 struct iwl_mvm_sta *mvmsta; 290 struct iwl_lq_sta_rs_fw *lq_sta; 291 u32 flags; 292 293 rcu_read_lock(); 294 295 notif = (void *)pkt->data; 296 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 297 if (IS_ERR_OR_NULL(sta)) { 298 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 299 notif->sta_id); 300 goto out; 301 } 302 303 mvmsta = iwl_mvm_sta_from_mac80211(sta); 304 305 if (!mvmsta) { 306 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 307 notif->sta_id); 308 goto out; 309 } 310 311 flags = le32_to_cpu(notif->flags); 312 313 lq_sta = &mvmsta->lq_sta.rs_fw; 314 315 if (flags & IWL_TLC_NOTIF_FLAG_RATE) { 316 char pretty_rate[100]; 317 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); 318 rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate), 319 lq_sta->last_rate_n_flags); 320 IWL_DEBUG_RATE(mvm, "new rate: %s\n", pretty_rate); 321 } 322 323 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) { 324 u16 size = le32_to_cpu(notif->amsdu_size); 325 int i; 326 327 if (sta->max_amsdu_len < size) { 328 /* 329 * In debug sta->max_amsdu_len < size 330 * so also check with orig_amsdu_len which holds the 331 * original data before debugfs changed the value 332 */ 333 WARN_ON(mvmsta->orig_amsdu_len < size); 334 goto out; 335 } 336 337 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); 338 mvmsta->max_amsdu_len = size; 339 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len; 340 341 for (i = 0; i < IWL_MAX_TID_COUNT; i++) { 342 if (mvmsta->amsdu_enabled & BIT(i)) 343 sta->max_tid_amsdu_len[i] = 344 iwl_mvm_max_amsdu_size(mvm, sta, i); 345 else 346 /* 347 * Not so elegant, but this will effectively 348 * prevent AMSDU on this TID 349 */ 350 sta->max_tid_amsdu_len[i] = 1; 351 } 352 353 IWL_DEBUG_RATE(mvm, 354 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", 355 le32_to_cpu(notif->amsdu_size), size, 356 mvmsta->amsdu_enabled); 357 } 358 out: 359 rcu_read_unlock(); 360 } 361 362 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta) 363 { 364 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 365 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 366 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 367 368 if (mvmsta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) { 369 switch (le16_get_bits(sta->he_6ghz_capa.capa, 370 IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) { 371 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 372 return IEEE80211_MAX_MPDU_LEN_VHT_11454; 373 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 374 return IEEE80211_MAX_MPDU_LEN_VHT_7991; 375 default: 376 return IEEE80211_MAX_MPDU_LEN_VHT_3895; 377 } 378 } else 379 if (vht_cap->vht_supported) { 380 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { 381 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 382 return IEEE80211_MAX_MPDU_LEN_VHT_11454; 383 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 384 return IEEE80211_MAX_MPDU_LEN_VHT_7991; 385 default: 386 return IEEE80211_MAX_MPDU_LEN_VHT_3895; 387 } 388 } else if (ht_cap->ht_supported) { 389 if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU) 390 /* 391 * agg is offloaded so we need to assume that agg 392 * are enabled and max mpdu in ampdu is 4095 393 * (spec 802.11-2016 9.3.2.1) 394 */ 395 return IEEE80211_MAX_MPDU_LEN_HT_BA; 396 else 397 return IEEE80211_MAX_MPDU_LEN_HT_3839; 398 } 399 400 /* in legacy mode no amsdu is enabled so return zero */ 401 return 0; 402 } 403 404 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 405 enum nl80211_band band, bool update) 406 { 407 struct ieee80211_hw *hw = mvm->hw; 408 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 409 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 410 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); 411 struct ieee80211_supported_band *sband = hw->wiphy->bands[band]; 412 u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta); 413 struct iwl_tlc_config_cmd cfg_cmd = { 414 .sta_id = mvmsta->sta_id, 415 .max_ch_width = update ? 416 rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20, 417 .flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)), 418 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), 419 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), 420 .max_mpdu_len = cpu_to_le16(max_amsdu_len), 421 .amsdu = iwl_mvm_is_csum_supported(mvm), 422 }; 423 int ret; 424 u16 cmd_size = sizeof(cfg_cmd); 425 426 /* In old versions of the API the struct is 4 bytes smaller */ 427 if (iwl_fw_lookup_cmd_ver(mvm->fw, DATA_PATH_GROUP, 428 TLC_MNG_CONFIG_CMD, 0) < 3) 429 cmd_size -= 4; 430 431 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); 432 433 #ifdef CONFIG_IWLWIFI_DEBUGFS 434 iwl_mvm_reset_frame_stats(mvm); 435 #endif 436 rs_fw_set_supp_rates(sta, sband, &cfg_cmd); 437 438 /* 439 * since TLC offload works with one mode we can assume 440 * that only vht/ht is used and also set it as station max amsdu 441 */ 442 sta->max_amsdu_len = max_amsdu_len; 443 444 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, cmd_size, 445 &cfg_cmd); 446 if (ret) 447 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); 448 } 449 450 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 451 bool enable) 452 { 453 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ 454 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); 455 return 0; 456 } 457 458 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) 459 { 460 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 461 462 IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); 463 464 lq_sta->pers.drv = mvm; 465 lq_sta->pers.sta_id = mvmsta->sta_id; 466 lq_sta->pers.chains = 0; 467 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); 468 lq_sta->pers.last_rssi = S8_MIN; 469 lq_sta->last_rate_n_flags = 0; 470 471 #ifdef CONFIG_MAC80211_DEBUGFS 472 lq_sta->pers.dbg_fixed_rate = 0; 473 #endif 474 } 475