1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2017 Intel Deutschland GmbH 9 * Copyright(c) 2018 - 2019 Intel Corporation 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * The full GNU General Public License is included in this distribution 21 * in the file called COPYING. 22 * 23 * Contact Information: 24 * Intel Linux Wireless <linuxwifi@intel.com> 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 * 27 * BSD LICENSE 28 * 29 * Copyright(c) 2017 Intel Deutschland GmbH 30 * Copyright(c) 2018 - 2019 Intel Corporation 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 37 * * Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * * Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in 41 * the documentation and/or other materials provided with the 42 * distribution. 43 * * Neither the name Intel Corporation nor the names of its 44 * contributors may be used to endorse or promote products derived 45 * from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 *****************************************************************************/ 60 #include "rs.h" 61 #include "fw-api.h" 62 #include "sta.h" 63 #include "iwl-op-mode.h" 64 #include "mvm.h" 65 66 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta) 67 { 68 switch (sta->bandwidth) { 69 case IEEE80211_STA_RX_BW_160: 70 return IWL_TLC_MNG_CH_WIDTH_160MHZ; 71 case IEEE80211_STA_RX_BW_80: 72 return IWL_TLC_MNG_CH_WIDTH_80MHZ; 73 case IEEE80211_STA_RX_BW_40: 74 return IWL_TLC_MNG_CH_WIDTH_40MHZ; 75 case IEEE80211_STA_RX_BW_20: 76 default: 77 return IWL_TLC_MNG_CH_WIDTH_20MHZ; 78 } 79 } 80 81 static u8 rs_fw_set_active_chains(u8 chains) 82 { 83 u8 fw_chains = 0; 84 85 if (chains & ANT_A) 86 fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK; 87 if (chains & ANT_B) 88 fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK; 89 if (chains & ANT_C) 90 WARN(false, 91 "tlc offload doesn't support antenna C. chains: 0x%x\n", 92 chains); 93 94 return fw_chains; 95 } 96 97 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta) 98 { 99 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 100 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 101 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 102 u8 supp = 0; 103 104 if (he_cap->has_he) 105 return 0; 106 107 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) 108 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); 109 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) 110 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); 111 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) 112 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); 113 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) 114 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); 115 116 return supp; 117 } 118 119 static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm, 120 struct ieee80211_sta *sta, 121 struct ieee80211_supported_band *sband) 122 { 123 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 124 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 125 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 126 bool vht_ena = vht_cap->vht_supported; 127 u16 flags = 0; 128 129 if (mvm->cfg->ht_params->stbc && 130 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) { 131 if (he_cap->has_he) { 132 if (he_cap->he_cap_elem.phy_cap_info[2] & 133 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ) 134 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 135 136 if (he_cap->he_cap_elem.phy_cap_info[7] & 137 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ) 138 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_STBC_160MHZ_MSK; 139 } else if ((ht_cap->cap & IEEE80211_HT_CAP_RX_STBC) || 140 (vht_ena && 141 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))) 142 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 143 } 144 145 if (mvm->cfg->ht_params->ldpc && 146 ((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) || 147 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) 148 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 149 150 /* consider our LDPC support in case of HE */ 151 if (sband->iftype_data && sband->iftype_data->he_cap.has_he && 152 !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] & 153 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)) 154 flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 155 156 if (he_cap->has_he && 157 (he_cap->he_cap_elem.phy_cap_info[3] & 158 IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK)) 159 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK; 160 161 return flags; 162 } 163 164 static 165 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, 166 int nss) 167 { 168 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & 169 (0x3 << (2 * (nss - 1))); 170 rx_mcs >>= (2 * (nss - 1)); 171 172 switch (rx_mcs) { 173 case IEEE80211_VHT_MCS_SUPPORT_0_7: 174 return IWL_TLC_MNG_HT_RATE_MCS7; 175 case IEEE80211_VHT_MCS_SUPPORT_0_8: 176 return IWL_TLC_MNG_HT_RATE_MCS8; 177 case IEEE80211_VHT_MCS_SUPPORT_0_9: 178 return IWL_TLC_MNG_HT_RATE_MCS9; 179 default: 180 WARN_ON_ONCE(1); 181 break; 182 } 183 184 return 0; 185 } 186 187 static void 188 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, 189 const struct ieee80211_sta_vht_cap *vht_cap, 190 struct iwl_tlc_config_cmd *cmd) 191 { 192 u16 supp; 193 int i, highest_mcs; 194 195 for (i = 0; i < sta->rx_nss; i++) { 196 if (i == MAX_NSS) 197 break; 198 199 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1); 200 if (!highest_mcs) 201 continue; 202 203 supp = BIT(highest_mcs + 1) - 1; 204 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) 205 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); 206 207 cmd->ht_rates[i][0] = cpu_to_le16(supp); 208 if (sta->bandwidth == IEEE80211_STA_RX_BW_160) 209 cmd->ht_rates[i][1] = cmd->ht_rates[i][0]; 210 } 211 } 212 213 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs) 214 { 215 switch (mcs) { 216 case IEEE80211_HE_MCS_SUPPORT_0_7: 217 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1; 218 case IEEE80211_HE_MCS_SUPPORT_0_9: 219 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1; 220 case IEEE80211_HE_MCS_SUPPORT_0_11: 221 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1; 222 case IEEE80211_HE_MCS_NOT_SUPPORTED: 223 return 0; 224 } 225 226 WARN(1, "invalid HE MCS %d\n", mcs); 227 return 0; 228 } 229 230 static void 231 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta, 232 struct ieee80211_supported_band *sband, 233 struct iwl_tlc_config_cmd *cmd) 234 { 235 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 236 u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); 237 u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); 238 u16 tx_mcs_80 = 239 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80); 240 u16 tx_mcs_160 = 241 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160); 242 int i; 243 244 for (i = 0; i < sta->rx_nss && i < MAX_NSS; i++) { 245 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3; 246 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3; 247 u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3; 248 u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3; 249 250 /* If one side doesn't support - mark both as not supporting */ 251 if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED || 252 _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) { 253 _mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; 254 _tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; 255 } 256 if (_mcs_80 > _tx_mcs_80) 257 _mcs_80 = _tx_mcs_80; 258 cmd->ht_rates[i][0] = 259 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80)); 260 261 /* If one side doesn't support - mark both as not supporting */ 262 if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED || 263 _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) { 264 _mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; 265 _tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; 266 } 267 if (_mcs_160 > _tx_mcs_160) 268 _mcs_160 = _tx_mcs_160; 269 cmd->ht_rates[i][1] = 270 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160)); 271 } 272 } 273 274 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, 275 struct ieee80211_supported_band *sband, 276 struct iwl_tlc_config_cmd *cmd) 277 { 278 int i; 279 unsigned long tmp; 280 unsigned long supp; /* must be unsigned long for for_each_set_bit */ 281 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 282 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 283 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 284 285 /* non HT rates */ 286 supp = 0; 287 tmp = sta->supp_rates[sband->band]; 288 for_each_set_bit(i, &tmp, BITS_PER_LONG) 289 supp |= BIT(sband->bitrates[i].hw_value); 290 291 cmd->non_ht_rates = cpu_to_le16(supp); 292 cmd->mode = IWL_TLC_MNG_MODE_NON_HT; 293 294 /* HT/VHT rates */ 295 if (he_cap->has_he) { 296 cmd->mode = IWL_TLC_MNG_MODE_HE; 297 rs_fw_he_set_enabled_rates(sta, sband, cmd); 298 } else if (vht_cap->vht_supported) { 299 cmd->mode = IWL_TLC_MNG_MODE_VHT; 300 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); 301 } else if (ht_cap->ht_supported) { 302 cmd->mode = IWL_TLC_MNG_MODE_HT; 303 cmd->ht_rates[0][0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]); 304 cmd->ht_rates[1][0] = cpu_to_le16(ht_cap->mcs.rx_mask[1]); 305 } 306 } 307 308 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 309 struct iwl_rx_cmd_buffer *rxb) 310 { 311 struct iwl_rx_packet *pkt = rxb_addr(rxb); 312 struct iwl_tlc_update_notif *notif; 313 struct ieee80211_sta *sta; 314 struct iwl_mvm_sta *mvmsta; 315 struct iwl_lq_sta_rs_fw *lq_sta; 316 u32 flags; 317 318 rcu_read_lock(); 319 320 notif = (void *)pkt->data; 321 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 322 if (IS_ERR_OR_NULL(sta)) { 323 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 324 notif->sta_id); 325 goto out; 326 } 327 328 mvmsta = iwl_mvm_sta_from_mac80211(sta); 329 330 if (!mvmsta) { 331 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 332 notif->sta_id); 333 goto out; 334 } 335 336 flags = le32_to_cpu(notif->flags); 337 338 lq_sta = &mvmsta->lq_sta.rs_fw; 339 340 if (flags & IWL_TLC_NOTIF_FLAG_RATE) { 341 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); 342 IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n", 343 lq_sta->last_rate_n_flags); 344 } 345 346 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) { 347 u16 size = le32_to_cpu(notif->amsdu_size); 348 int i; 349 350 if (WARN_ON(sta->max_amsdu_len < size)) 351 goto out; 352 353 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); 354 mvmsta->max_amsdu_len = size; 355 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len; 356 357 for (i = 0; i < IWL_MAX_TID_COUNT; i++) { 358 if (mvmsta->amsdu_enabled & BIT(i)) 359 sta->max_tid_amsdu_len[i] = 360 iwl_mvm_max_amsdu_size(mvm, sta, i); 361 else 362 /* 363 * Not so elegant, but this will effectively 364 * prevent AMSDU on this TID 365 */ 366 sta->max_tid_amsdu_len[i] = 1; 367 } 368 369 IWL_DEBUG_RATE(mvm, 370 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", 371 le32_to_cpu(notif->amsdu_size), size, 372 mvmsta->amsdu_enabled); 373 } 374 out: 375 rcu_read_unlock(); 376 } 377 378 static u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta) 379 { 380 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 381 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 382 383 if (vht_cap->vht_supported) { 384 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { 385 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: 386 return IEEE80211_MAX_MPDU_LEN_VHT_11454; 387 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: 388 return IEEE80211_MAX_MPDU_LEN_VHT_7991; 389 default: 390 return IEEE80211_MAX_MPDU_LEN_VHT_3895; 391 } 392 393 } else if (ht_cap->ht_supported) { 394 if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU) 395 /* 396 * agg is offloaded so we need to assume that agg 397 * are enabled and max mpdu in ampdu is 4095 398 * (spec 802.11-2016 9.3.2.1) 399 */ 400 return IEEE80211_MAX_MPDU_LEN_HT_BA; 401 else 402 return IEEE80211_MAX_MPDU_LEN_HT_3839; 403 } 404 405 /* in legacy mode no amsdu is enabled so return zero */ 406 return 0; 407 } 408 409 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 410 enum nl80211_band band, bool update) 411 { 412 struct ieee80211_hw *hw = mvm->hw; 413 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 414 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 415 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); 416 struct ieee80211_supported_band *sband = hw->wiphy->bands[band]; 417 u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta); 418 struct iwl_tlc_config_cmd cfg_cmd = { 419 .sta_id = mvmsta->sta_id, 420 .max_ch_width = update ? 421 rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20, 422 .flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)), 423 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), 424 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), 425 .max_mpdu_len = cpu_to_le16(max_amsdu_len), 426 .amsdu = iwl_mvm_is_csum_supported(mvm), 427 }; 428 int ret; 429 430 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); 431 432 #ifdef CONFIG_IWLWIFI_DEBUGFS 433 iwl_mvm_reset_frame_stats(mvm); 434 #endif 435 rs_fw_set_supp_rates(sta, sband, &cfg_cmd); 436 437 /* 438 * since TLC offload works with one mode we can assume 439 * that only vht/ht is used and also set it as station max amsdu 440 */ 441 sta->max_amsdu_len = max_amsdu_len; 442 443 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, sizeof(cfg_cmd), 444 &cfg_cmd); 445 if (ret) 446 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); 447 } 448 449 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 450 bool enable) 451 { 452 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ 453 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); 454 return 0; 455 } 456 457 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) 458 { 459 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 460 461 IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); 462 463 lq_sta->pers.drv = mvm; 464 lq_sta->pers.sta_id = mvmsta->sta_id; 465 lq_sta->pers.chains = 0; 466 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); 467 lq_sta->pers.last_rssi = S8_MIN; 468 lq_sta->last_rate_n_flags = 0; 469 470 #ifdef CONFIG_MAC80211_DEBUGFS 471 lq_sta->pers.dbg_fixed_rate = 0; 472 #endif 473 } 474