root/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c

DEFINITIONS

1. rs_fw_bw_from_sta_bw
2. rs_fw_set_active_chains
3. rs_fw_sgi_cw_support
4. rs_fw_get_config_flags
5. rs_fw_vht_highest_rx_mcs_index
6. rs_fw_vht_set_enabled_rates
7. rs_fw_he_ieee80211_mcs_to_rs_mcs
8. rs_fw_he_set_enabled_rates
9. rs_fw_set_supp_rates
10. iwl_mvm_tlc_update_notif
11. rs_fw_get_max_amsdu_len
12. rs_fw_rate_init
13. rs_fw_tx_protection
14. iwl_mvm_rs_add_sta

   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 - 2020 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 - 2020 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 LDPC support in case of HE */
 151         if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] &
 152             IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
 153                 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
 154 
 155         if (sband->iftype_data && sband->iftype_data->he_cap.has_he &&
 156             !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] &
 157              IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
 158                 flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
 159 
 160         if (he_cap->has_he &&
 161             (he_cap->he_cap_elem.phy_cap_info[3] &
 162              IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK))
 163                 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK;
 164 
 165         return flags;
 166 }
 167 
 168 static
 169 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap,
 170                                    int nss)
 171 {
 172         u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
 173                 (0x3 << (2 * (nss - 1)));
 174         rx_mcs >>= (2 * (nss - 1));
 175 
 176         switch (rx_mcs) {
 177         case IEEE80211_VHT_MCS_SUPPORT_0_7:
 178                 return IWL_TLC_MNG_HT_RATE_MCS7;
 179         case IEEE80211_VHT_MCS_SUPPORT_0_8:
 180                 return IWL_TLC_MNG_HT_RATE_MCS8;
 181         case IEEE80211_VHT_MCS_SUPPORT_0_9:
 182                 return IWL_TLC_MNG_HT_RATE_MCS9;
 183         default:
 184                 WARN_ON_ONCE(1);
 185                 break;
 186         }
 187 
 188         return 0;
 189 }
 190 
 191 static void
 192 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta,
 193                             const struct ieee80211_sta_vht_cap *vht_cap,
 194                             struct iwl_tlc_config_cmd *cmd)
 195 {
 196         u16 supp;
 197         int i, highest_mcs;
 198         u8 nss = sta->rx_nss;
 199 
 200         /* the station support only a single receive chain */
 201         if (sta->smps_mode == IEEE80211_SMPS_STATIC)
 202                 nss = 1;
 203 
 204         for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
 205                 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
 206                 if (!highest_mcs)
 207                         continue;
 208 
 209                 supp = BIT(highest_mcs + 1) - 1;
 210                 if (sta->bandwidth == IEEE80211_STA_RX_BW_20)
 211                         supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
 212 
 213                 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = cpu_to_le16(supp);
 214                 if (sta->bandwidth == IEEE80211_STA_RX_BW_160)
 215                         cmd->ht_rates[i][IWL_TLC_HT_BW_160] =
 216                                 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160];
 217         }
 218 }
 219 
 220 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs)
 221 {
 222         switch (mcs) {
 223         case IEEE80211_HE_MCS_SUPPORT_0_7:
 224                 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1;
 225         case IEEE80211_HE_MCS_SUPPORT_0_9:
 226                 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1;
 227         case IEEE80211_HE_MCS_SUPPORT_0_11:
 228                 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1;
 229         case IEEE80211_HE_MCS_NOT_SUPPORTED:
 230                 return 0;
 231         }
 232 
 233         WARN(1, "invalid HE MCS %d\n", mcs);
 234         return 0;
 235 }
 236 
 237 static void
 238 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta,
 239                            struct ieee80211_supported_band *sband,
 240                            struct iwl_tlc_config_cmd *cmd)
 241 {
 242         const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
 243         u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
 244         u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
 245         u16 tx_mcs_80 =
 246                 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80);
 247         u16 tx_mcs_160 =
 248                 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160);
 249         int i;
 250         u8 nss = sta->rx_nss;
 251 
 252         /* the station support only a single receive chain */
 253         if (sta->smps_mode == IEEE80211_SMPS_STATIC)
 254                 nss = 1;
 255 
 256         for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
 257                 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
 258                 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
 259                 u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
 260                 u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3;
 261 
 262                 /* If one side doesn't support - mark both as not supporting */
 263                 if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
 264                     _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
 265                         _mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
 266                         _tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
 267                 }
 268                 if (_mcs_80 > _tx_mcs_80)
 269                         _mcs_80 = _tx_mcs_80;
 270                 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] =
 271                         cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80));
 272 
 273                 /* If one side doesn't support - mark both as not supporting */
 274                 if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
 275                     _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
 276                         _mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
 277                         _tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
 278                 }
 279                 if (_mcs_160 > _tx_mcs_160)
 280                         _mcs_160 = _tx_mcs_160;
 281                 cmd->ht_rates[i][IWL_TLC_HT_BW_160] =
 282                         cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160));
 283         }
 284 }
 285 
 286 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
 287                                  struct ieee80211_supported_band *sband,
 288                                  struct iwl_tlc_config_cmd *cmd)
 289 {
 290         int i;
 291         unsigned long tmp;
 292         unsigned long supp; /* must be unsigned long for for_each_set_bit */
 293         const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
 294         const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
 295         const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
 296 
 297         /* non HT rates */
 298         supp = 0;
 299         tmp = sta->supp_rates[sband->band];
 300         for_each_set_bit(i, &tmp, BITS_PER_LONG)
 301                 supp |= BIT(sband->bitrates[i].hw_value);
 302 
 303         cmd->non_ht_rates = cpu_to_le16(supp);
 304         cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
 305 
 306         /* HT/VHT rates */
 307         if (he_cap->has_he) {
 308                 cmd->mode = IWL_TLC_MNG_MODE_HE;
 309                 rs_fw_he_set_enabled_rates(sta, sband, cmd);
 310         } else if (vht_cap->vht_supported) {
 311                 cmd->mode = IWL_TLC_MNG_MODE_VHT;
 312                 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd);
 313         } else if (ht_cap->ht_supported) {
 314                 cmd->mode = IWL_TLC_MNG_MODE_HT;
 315                 cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] =
 316                         cpu_to_le16(ht_cap->mcs.rx_mask[0]);
 317 
 318                 /* the station support only a single receive chain */
 319                 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
 320                         cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
 321                                 0;
 322                 else
 323                         cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
 324                                 cpu_to_le16(ht_cap->mcs.rx_mask[1]);
 325         }
 326 }
 327 
 328 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
 329                               struct iwl_rx_cmd_buffer *rxb)
 330 {
 331         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 332         struct iwl_tlc_update_notif *notif;
 333         struct ieee80211_sta *sta;
 334         struct iwl_mvm_sta *mvmsta;
 335         struct iwl_lq_sta_rs_fw *lq_sta;
 336         u32 flags;
 337 
 338         rcu_read_lock();
 339 
 340         notif = (void *)pkt->data;
 341         sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]);
 342         if (IS_ERR_OR_NULL(sta)) {
 343                 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
 344                         notif->sta_id);
 345                 goto out;
 346         }
 347 
 348         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 349 
 350         if (!mvmsta) {
 351                 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
 352                         notif->sta_id);
 353                 goto out;
 354         }
 355 
 356         flags = le32_to_cpu(notif->flags);
 357 
 358         lq_sta = &mvmsta->lq_sta.rs_fw;
 359 
 360         if (flags & IWL_TLC_NOTIF_FLAG_RATE) {
 361                 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate);
 362                 IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n",
 363                                lq_sta->last_rate_n_flags);
 364         }
 365 
 366         if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) {
 367                 u16 size = le32_to_cpu(notif->amsdu_size);
 368                 int i;
 369 
 370                 /*
 371                  * In debug sta->max_amsdu_len < size
 372                  * so also check with orig_amsdu_len which holds the original
 373                  * data before debugfs changed the value
 374                  */
 375                 if (WARN_ON(sta->max_amsdu_len < size &&
 376                             mvmsta->orig_amsdu_len < size))
 377                         goto out;
 378 
 379                 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled);
 380                 mvmsta->max_amsdu_len = size;
 381                 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len;
 382 
 383                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 384                         if (mvmsta->amsdu_enabled & BIT(i))
 385                                 sta->max_tid_amsdu_len[i] =
 386                                         iwl_mvm_max_amsdu_size(mvm, sta, i);
 387                         else
 388                                 /*
 389                                  * Not so elegant, but this will effectively
 390                                  * prevent AMSDU on this TID
 391                                  */
 392                                 sta->max_tid_amsdu_len[i] = 1;
 393                 }
 394 
 395                 IWL_DEBUG_RATE(mvm,
 396                                "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n",
 397                                le32_to_cpu(notif->amsdu_size), size,
 398                                mvmsta->amsdu_enabled);
 399         }
 400 out:
 401         rcu_read_unlock();
 402 }
 403 
 404 static u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta)
 405 {
 406         const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
 407         const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
 408 
 409         if (vht_cap->vht_supported) {
 410                 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
 411                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 412                         return IEEE80211_MAX_MPDU_LEN_VHT_11454;
 413                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 414                         return IEEE80211_MAX_MPDU_LEN_VHT_7991;
 415                 default:
 416                         return IEEE80211_MAX_MPDU_LEN_VHT_3895;
 417         }
 418 
 419         } else if (ht_cap->ht_supported) {
 420                 if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU)
 421                         /*
 422                          * agg is offloaded so we need to assume that agg
 423                          * are enabled and max mpdu in ampdu is 4095
 424                          * (spec 802.11-2016 9.3.2.1)
 425                          */
 426                         return IEEE80211_MAX_MPDU_LEN_HT_BA;
 427                 else
 428                         return IEEE80211_MAX_MPDU_LEN_HT_3839;
 429         }
 430 
 431         /* in legacy mode no amsdu is enabled so return zero */
 432         return 0;
 433 }
 434 
 435 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 436                      enum nl80211_band band, bool update)
 437 {
 438         struct ieee80211_hw *hw = mvm->hw;
 439         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 440         struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
 441         u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0);
 442         struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
 443         u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta);
 444         struct iwl_tlc_config_cmd cfg_cmd = {
 445                 .sta_id = mvmsta->sta_id,
 446                 .max_ch_width = update ?
 447                         rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20,
 448                 .flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)),
 449                 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
 450                 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta),
 451                 .max_mpdu_len = cpu_to_le16(max_amsdu_len),
 452                 .amsdu = iwl_mvm_is_csum_supported(mvm),
 453         };
 454         int ret;
 455 
 456         memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
 457 
 458 #ifdef CONFIG_IWLWIFI_DEBUGFS
 459         iwl_mvm_reset_frame_stats(mvm);
 460 #endif
 461         rs_fw_set_supp_rates(sta, sband, &cfg_cmd);
 462 
 463         /*
 464          * since TLC offload works with one mode we can assume
 465          * that only vht/ht is used and also set it as station max amsdu
 466          */
 467         sta->max_amsdu_len = max_amsdu_len;
 468 
 469         ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, sizeof(cfg_cmd),
 470                                    &cfg_cmd);
 471         if (ret)
 472                 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
 473 }
 474 
 475 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 476                         bool enable)
 477 {
 478         /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
 479         IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
 480         return 0;
 481 }
 482 
 483 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
 484 {
 485         struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
 486 
 487         IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
 488 
 489         lq_sta->pers.drv = mvm;
 490         lq_sta->pers.sta_id = mvmsta->sta_id;
 491         lq_sta->pers.chains = 0;
 492         memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
 493         lq_sta->pers.last_rssi = S8_MIN;
 494         lq_sta->last_rate_n_flags = 0;
 495 
 496 #ifdef CONFIG_MAC80211_DEBUGFS
 497         lq_sta->pers.dbg_fixed_rate = 0;
 498 #endif
 499 }