drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2022-2024 Intel Corporation
   4  */
   5 #include "mvm.h"
   6 #include "time-sync.h"
   7 #include "sta.h"
   8
   9 u32 iwl_mvm_sta_fw_id_mask(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
  10                            int filter_link_id)
  11 {
  12         struct ieee80211_link_sta *link_sta;
  13         struct iwl_mvm_sta *mvmsta;
  14         struct ieee80211_vif *vif;
  15         unsigned int link_id;
  16         u32 result = 0;
  17
  18         if (!sta)
  19                 return 0;
  20
  21         mvmsta = iwl_mvm_sta_from_mac80211(sta);
  22         vif = mvmsta->vif;
  23
  24         /* it's easy when the STA is not an MLD */
  25         if (!sta->valid_links)
  26                 return BIT(mvmsta->deflink.sta_id);
  27
  28         /* but if it is an MLD, get the mask of all the FW STAs it has ... */
  29         for_each_sta_active_link(vif, sta, link_sta, link_id) {
  30                 struct iwl_mvm_link_sta *mvm_link_sta;
  31
  32                 /* unless we have a specific link in mind */
  33                 if (filter_link_id >= 0 && link_id != filter_link_id)
  34                         continue;
  35
  36                 mvm_link_sta =
  37                         rcu_dereference_check(mvmsta->link[link_id],
  38                                               lockdep_is_held(&mvm->mutex));
  39                 if (!mvm_link_sta)
  40                         continue;
  41
  42                 result |= BIT(mvm_link_sta->sta_id);
  43         }
  44
  45         return result;
  46 }
  47
  48 static int iwl_mvm_mld_send_sta_cmd(struct iwl_mvm *mvm,
  49                                     struct iwl_sta_cfg_cmd *cmd)
  50 {
  51         int ret = iwl_mvm_send_cmd_pdu(mvm,
  52                                        WIDE_ID(MAC_CONF_GROUP, STA_CONFIG_CMD),
  53                                        0, sizeof(*cmd), cmd);
  54         if (ret)
  55                 IWL_ERR(mvm, "STA_CONFIG_CMD send failed, ret=0x%x\n", ret);
  56         return ret;
  57 }
  58
  59 /*
  60  * Add an internal station to the FW table
  61  */
  62 static int iwl_mvm_mld_add_int_sta_to_fw(struct iwl_mvm *mvm,
  63                                          struct iwl_mvm_int_sta *sta,
  64                                          const u8 *addr, int link_id)
  65 {
  66         struct iwl_sta_cfg_cmd cmd;
  67
  68         lockdep_assert_held(&mvm->mutex);
  69
  70         memset(&cmd, 0, sizeof(cmd));
  71         cmd.sta_id = cpu_to_le32((u8)sta->sta_id);
  72
  73         cmd.link_id = cpu_to_le32(link_id);
  74
  75         cmd.station_type = cpu_to_le32(sta->type);
  76
  77         if (fw_has_capa(&mvm->fw->ucode_capa,
  78                         IWL_UCODE_TLV_CAPA_STA_EXP_MFP_SUPPORT) &&
  79             sta->type == STATION_TYPE_BCAST_MGMT)
  80                 cmd.mfp = cpu_to_le32(1);
  81
  82         if (addr) {
  83                 memcpy(cmd.peer_mld_address, addr, ETH_ALEN);
  84                 memcpy(cmd.peer_link_address, addr, ETH_ALEN);
  85         }
  86
  87         return iwl_mvm_mld_send_sta_cmd(mvm, &cmd);
  88 }
  89
  90 /*
  91  * Remove a station from the FW table. Before sending the command to remove
  92  * the station validate that the station is indeed known to the driver (sanity
  93  * only).
  94  */
  95 static int iwl_mvm_mld_rm_sta_from_fw(struct iwl_mvm *mvm, u32 sta_id)
  96 {
  97         struct iwl_remove_sta_cmd rm_sta_cmd = {
  98                 .sta_id = cpu_to_le32(sta_id),
  99         };
 100         int ret;
 101
 102         /* Note: internal stations are marked as error values */
 103         if (!rcu_access_pointer(mvm->fw_id_to_mac_id[sta_id])) {
 104                 IWL_ERR(mvm, "Invalid station id %d\n", sta_id);
 105                 return -EINVAL;
 106         }
 107
 108         ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, STA_REMOVE_CMD),
 109                                    0, sizeof(rm_sta_cmd), &rm_sta_cmd);
 110         if (ret) {
 111                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
 112                 return ret;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int iwl_mvm_add_aux_sta_to_fw(struct iwl_mvm *mvm,
 119                                      struct iwl_mvm_int_sta *sta,
 120                                      u32 lmac_id)
 121 {
 122         int ret;
 123
 124         struct iwl_mvm_aux_sta_cmd cmd = {
 125                 .sta_id = cpu_to_le32(sta->sta_id),
 126                 .lmac_id = cpu_to_le32(lmac_id),
 127         };
 128
 129         ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, AUX_STA_CMD),
 130                                    0, sizeof(cmd), &cmd);
 131         if (ret)
 132                 IWL_ERR(mvm, "Failed to send AUX_STA_CMD\n");
 133         return ret;
 134 }
 135
 136 /*
 137  * Adds an internal sta to the FW table with its queues
 138  */
 139 int iwl_mvm_mld_add_int_sta_with_queue(struct iwl_mvm *mvm,
 140                                        struct iwl_mvm_int_sta *sta,
 141                                        const u8 *addr, int link_id,
 142                                        u16 *queue, u8 tid,
 143                                        unsigned int *_wdg_timeout)
 144 {
 145         int ret, txq;
 146         unsigned int wdg_timeout = _wdg_timeout ? *_wdg_timeout :
 147                 mvm->trans->trans_cfg->base_params->wd_timeout;
 148
 149         if (WARN_ON_ONCE(sta->sta_id == IWL_INVALID_STA))
 150                 return -ENOSPC;
 151
 152         if (sta->type == STATION_TYPE_AUX)
 153                 ret = iwl_mvm_add_aux_sta_to_fw(mvm, sta, link_id);
 154         else
 155                 ret = iwl_mvm_mld_add_int_sta_to_fw(mvm, sta, addr, link_id);
 156         if (ret)
 157                 return ret;
 158
 159         /*
 160          * For 22000 firmware and on we cannot add queue to a station unknown
 161          * to firmware so enable queue here - after the station was added
 162          */
 163         txq = iwl_mvm_tvqm_enable_txq(mvm, NULL, sta->sta_id, tid,
 164                                       wdg_timeout);
 165         if (txq < 0) {
 166                 iwl_mvm_mld_rm_sta_from_fw(mvm, sta->sta_id);
 167                 return txq;
 168         }
 169         *queue = txq;
 170
 171         return 0;
 172 }
 173
 174 /*
 175  * Adds a new int sta: allocate it in the driver, add it to the FW table,
 176  * and add its queues.
 177  */
 178 static int iwl_mvm_mld_add_int_sta(struct iwl_mvm *mvm,
 179                                    struct iwl_mvm_int_sta *int_sta, u16 *queue,
 180                                    enum nl80211_iftype iftype,
 181                                    enum iwl_fw_sta_type sta_type,
 182                                    int link_id, const u8 *addr, u8 tid,
 183                                    unsigned int *wdg_timeout)
 184 {
 185         int ret;
 186
 187         lockdep_assert_held(&mvm->mutex);
 188
 189         /* qmask argument is not used in the new tx api, send a don't care */
 190         ret = iwl_mvm_allocate_int_sta(mvm, int_sta, 0, iftype,
 191                                        sta_type);
 192         if (ret)
 193                 return ret;
 194
 195         ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, int_sta, addr, link_id,
 196                                                  queue, tid, wdg_timeout);
 197         if (ret) {
 198                 iwl_mvm_dealloc_int_sta(mvm, int_sta);
 199                 return ret;
 200         }
 201
 202         return 0;
 203 }
 204
 205 /* Allocate a new station entry for the broadcast station to the given vif,
 206  * and send it to the FW.
 207  * Note that each P2P mac should have its own broadcast station.
 208  */
 209 int iwl_mvm_mld_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 210                               struct ieee80211_bss_conf *link_conf)
 211 {
 212         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 213         struct iwl_mvm_vif_link_info *mvm_link =
 214                 mvmvif->link[link_conf->link_id];
 215         struct iwl_mvm_int_sta *bsta = &mvm_link->bcast_sta;
 216         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
 217         const u8 *baddr = _baddr;
 218         unsigned int wdg_timeout =
 219                 iwl_mvm_get_wd_timeout(mvm, vif);
 220         u16 *queue;
 221
 222         lockdep_assert_held(&mvm->mutex);
 223
 224         if (vif->type == NL80211_IFTYPE_ADHOC)
 225                 baddr = link_conf->bssid;
 226
 227         if (vif->type == NL80211_IFTYPE_AP ||
 228             vif->type == NL80211_IFTYPE_ADHOC) {
 229                 queue = &mvm_link->mgmt_queue;
 230         } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 231                 queue = &mvm->p2p_dev_queue;
 232         } else {
 233                 WARN(1, "Missing required TXQ for adding bcast STA\n");
 234                 return -EINVAL;
 235         }
 236
 237         return iwl_mvm_mld_add_int_sta(mvm, bsta, queue,
 238                                        ieee80211_vif_type_p2p(vif),
 239                                        STATION_TYPE_BCAST_MGMT,
 240                                        mvm_link->fw_link_id, baddr,
 241                                        IWL_MAX_TID_COUNT, &wdg_timeout);
 242 }
 243
 244 /* Allocate a new station entry for the multicast station to the given vif,
 245  * and send it to the FW.
 246  * Note that each AP/GO mac should have its own multicast station.
 247  */
 248 int iwl_mvm_mld_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 249                               struct ieee80211_bss_conf *link_conf)
 250 {
 251         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 252         struct iwl_mvm_vif_link_info *mvm_link =
 253                 mvmvif->link[link_conf->link_id];
 254         struct iwl_mvm_int_sta *msta = &mvm_link->mcast_sta;
 255         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
 256         const u8 *maddr = _maddr;
 257         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif);
 258
 259         lockdep_assert_held(&mvm->mutex);
 260
 261         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 262                     vif->type != NL80211_IFTYPE_ADHOC))
 263                 return -EOPNOTSUPP;
 264
 265         /* In IBSS, ieee80211_check_queues() sets the cab_queue to be
 266          * invalid, so make sure we use the queue we want.
 267          * Note that this is done here as we want to avoid making DQA
 268          * changes in mac80211 layer.
 269          */
 270         if (vif->type == NL80211_IFTYPE_ADHOC)
 271                 mvm_link->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 272
 273         return iwl_mvm_mld_add_int_sta(mvm, msta, &mvm_link->cab_queue,
 274                                        vif->type, STATION_TYPE_MCAST,
 275                                        mvm_link->fw_link_id, maddr, 0,
 276                                        &timeout);
 277 }
 278
 279 /* Allocate a new station entry for the sniffer station to the given vif,
 280  * and send it to the FW.
 281  */
 282 int iwl_mvm_mld_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 283                              struct ieee80211_bss_conf *link_conf)
 284 {
 285         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 286         struct iwl_mvm_vif_link_info *mvm_link =
 287                 mvmvif->link[link_conf->link_id];
 288
 289         lockdep_assert_held(&mvm->mutex);
 290
 291         return iwl_mvm_mld_add_int_sta(mvm, &mvm->snif_sta, &mvm->snif_queue,
 292                                        vif->type, STATION_TYPE_BCAST_MGMT,
 293                                        mvm_link->fw_link_id, NULL,
 294                                        IWL_MAX_TID_COUNT, NULL);
 295 }
 296
 297 int iwl_mvm_mld_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
 298 {
 299         lockdep_assert_held(&mvm->mutex);
 300
 301         /* In CDB NICs we need to specify which lmac to use for aux activity;
 302          * use the link_id argument place to send lmac_id to the function.
 303          */
 304         return iwl_mvm_mld_add_int_sta(mvm, &mvm->aux_sta, &mvm->aux_queue,
 305                                        NL80211_IFTYPE_UNSPECIFIED,
 306                                        STATION_TYPE_AUX, lmac_id, NULL,
 307                                        IWL_MAX_TID_COUNT, NULL);
 308 }
 309
 310 static int iwl_mvm_mld_disable_txq(struct iwl_mvm *mvm, u32 sta_mask,
 311                                    u16 *queueptr, u8 tid)
 312 {
 313         int queue = *queueptr;
 314         int ret = 0;
 315
 316         if (tid == IWL_MAX_TID_COUNT)
 317                 tid = IWL_MGMT_TID;
 318
 319         if (mvm->sta_remove_requires_queue_remove) {
 320                 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP,
 321                                      SCD_QUEUE_CONFIG_CMD);
 322                 struct iwl_scd_queue_cfg_cmd remove_cmd = {
 323                         .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE),
 324                         .u.remove.tid = cpu_to_le32(tid),
 325                         .u.remove.sta_mask = cpu_to_le32(sta_mask),
 326                 };
 327
 328                 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0,
 329                                            sizeof(remove_cmd),
 330                                            &remove_cmd);
 331         }
 332
 333         iwl_trans_txq_free(mvm->trans, queue);
 334         *queueptr = IWL_MVM_INVALID_QUEUE;
 335
 336         return ret;
 337 }
 338
 339 /* Removes a sta from the FW table, disable its queues, and dealloc it
 340  */
 341 static int iwl_mvm_mld_rm_int_sta(struct iwl_mvm *mvm,
 342                                   struct iwl_mvm_int_sta *int_sta,
 343                                   bool flush, u8 tid, u16 *queuptr)
 344 {
 345         int ret;
 346
 347         lockdep_assert_held(&mvm->mutex);
 348
 349         if (WARN_ON_ONCE(int_sta->sta_id == IWL_INVALID_STA))
 350                 return -EINVAL;
 351
 352         if (flush)
 353                 iwl_mvm_flush_sta(mvm, int_sta->sta_id, int_sta->tfd_queue_msk);
 354
 355         iwl_mvm_mld_disable_txq(mvm, BIT(int_sta->sta_id), queuptr, tid);
 356
 357         ret = iwl_mvm_mld_rm_sta_from_fw(mvm, int_sta->sta_id);
 358         if (ret)
 359                 IWL_WARN(mvm, "Failed sending remove station\n");
 360
 361         iwl_mvm_dealloc_int_sta(mvm, int_sta);
 362
 363         return ret;
 364 }
 365
 366 int iwl_mvm_mld_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 367                              struct ieee80211_bss_conf *link_conf)
 368 {
 369         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 370         struct iwl_mvm_vif_link_info *link = mvmvif->link[link_conf->link_id];
 371         u16 *queueptr;
 372
 373         lockdep_assert_held(&mvm->mutex);
 374
 375         if (WARN_ON(!link))
 376                 return -EIO;
 377
 378         switch (vif->type) {
 379         case NL80211_IFTYPE_AP:
 380         case NL80211_IFTYPE_ADHOC:
 381                 queueptr = &link->mgmt_queue;
 382                 break;
 383         case NL80211_IFTYPE_P2P_DEVICE:
 384                 queueptr = &mvm->p2p_dev_queue;
 385                 break;
 386         default:
 387                 WARN(1, "Can't free bcast queue on vif type %d\n",
 388                      vif->type);
 389                 return -EINVAL;
 390         }
 391
 392         return iwl_mvm_mld_rm_int_sta(mvm, &link->bcast_sta,
 393                                       true, IWL_MAX_TID_COUNT, queueptr);
 394 }
 395
 396 /* Send the FW a request to remove the station from it's internal data
 397  * structures, and in addition remove it from the local data structure.
 398  */
 399 int iwl_mvm_mld_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 400                              struct ieee80211_bss_conf *link_conf)
 401 {
 402         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 403         struct iwl_mvm_vif_link_info *link = mvmvif->link[link_conf->link_id];
 404
 405         lockdep_assert_held(&mvm->mutex);
 406
 407         if (WARN_ON(!link))
 408                 return -EIO;
 409
 410         return iwl_mvm_mld_rm_int_sta(mvm, &link->mcast_sta, true, 0,
 411                                       &link->cab_queue);
 412 }
 413
 414 int iwl_mvm_mld_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 415 {
 416         lockdep_assert_held(&mvm->mutex);
 417
 418         return iwl_mvm_mld_rm_int_sta(mvm, &mvm->snif_sta, false,
 419                                       IWL_MAX_TID_COUNT, &mvm->snif_queue);
 420 }
 421
 422 int iwl_mvm_mld_rm_aux_sta(struct iwl_mvm *mvm)
 423 {
 424         lockdep_assert_held(&mvm->mutex);
 425
 426         return iwl_mvm_mld_rm_int_sta(mvm, &mvm->aux_sta, false,
 427                                       IWL_MAX_TID_COUNT, &mvm->aux_queue);
 428 }
 429
 430 /* send a cfg sta command to add/update a sta in firmware */
 431 static int iwl_mvm_mld_cfg_sta(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 432                                struct ieee80211_vif *vif,
 433                                struct ieee80211_link_sta *link_sta,
 434                                struct ieee80211_bss_conf *link_conf,
 435                                struct iwl_mvm_link_sta *mvm_link_sta)
 436 {
 437         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 438         struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
 439         struct iwl_mvm_vif_link_info *link_info =
 440                                         mvm_vif->link[link_conf->link_id];
 441         struct iwl_sta_cfg_cmd cmd = {
 442                 .sta_id = cpu_to_le32(mvm_link_sta->sta_id),
 443                 .station_type = cpu_to_le32(mvm_sta->sta_type),
 444         };
 445         u32 agg_size = 0, mpdu_dens = 0;
 446
 447         /* when adding sta, link should exist in FW */
 448         if (WARN_ON(link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID))
 449                 return -EINVAL;
 450
 451         cmd.link_id = cpu_to_le32(link_info->fw_link_id);
 452
 453         memcpy(&cmd.peer_mld_address, sta->addr, ETH_ALEN);
 454         memcpy(&cmd.peer_link_address, link_sta->addr, ETH_ALEN);
 455
 456         if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
 457                 cmd.assoc_id = cpu_to_le32(sta->aid);
 458
 459         if (fw_has_capa(&mvm->fw->ucode_capa,
 460                         IWL_UCODE_TLV_CAPA_STA_EXP_MFP_SUPPORT) &&
 461             (sta->mfp || mvm_sta->sta_state < IEEE80211_STA_AUTHORIZED))
 462                 cmd.mfp = cpu_to_le32(1);
 463
 464         switch (link_sta->rx_nss) {
 465         case 1:
 466                 cmd.mimo = cpu_to_le32(0);
 467                 break;
 468         case 2 ... 8:
 469                 cmd.mimo = cpu_to_le32(1);
 470                 break;
 471         }
 472
 473         switch (link_sta->smps_mode) {
 474         case IEEE80211_SMPS_AUTOMATIC:
 475         case IEEE80211_SMPS_NUM_MODES:
 476                 WARN_ON(1);
 477                 break;
 478         case IEEE80211_SMPS_STATIC:
 479                 /* override NSS */
 480                 cmd.mimo = cpu_to_le32(0);
 481                 break;
 482         case IEEE80211_SMPS_DYNAMIC:
 483                 cmd.mimo_protection = cpu_to_le32(1);
 484                 break;
 485         case IEEE80211_SMPS_OFF:
 486                 /* nothing */
 487                 break;
 488         }
 489
 490         mpdu_dens = iwl_mvm_get_sta_ampdu_dens(link_sta, link_conf, &agg_size);
 491         cmd.tx_ampdu_spacing = cpu_to_le32(mpdu_dens);
 492         cmd.tx_ampdu_max_size = cpu_to_le32(agg_size);
 493
 494         if (sta->wme) {
 495                 cmd.sp_length =
 496                         cpu_to_le32(sta->max_sp ? sta->max_sp * 2 : 128);
 497                 cmd.uapsd_acs = cpu_to_le32(iwl_mvm_get_sta_uapsd_acs(sta));
 498         }
 499
 500         if (link_sta->he_cap.has_he) {
 501                 cmd.trig_rnd_alloc =
 502                         cpu_to_le32(link_conf->uora_exists ? 1 : 0);
 503
 504                 /* PPE Thresholds */
 505                 iwl_mvm_set_sta_pkt_ext(mvm, link_sta, &cmd.pkt_ext);
 506
 507                 /* HTC flags */
 508                 cmd.htc_flags = iwl_mvm_get_sta_htc_flags(sta, link_sta);
 509
 510                 if (link_sta->he_cap.he_cap_elem.mac_cap_info[2] &
 511                     IEEE80211_HE_MAC_CAP2_ACK_EN)
 512                         cmd.ack_enabled = cpu_to_le32(1);
 513         }
 514
 515         return iwl_mvm_mld_send_sta_cmd(mvm, &cmd);
 516 }
 517
 518 void iwl_mvm_mld_free_sta_link(struct iwl_mvm *mvm,
 519                                struct iwl_mvm_sta *mvm_sta,
 520                                struct iwl_mvm_link_sta *mvm_sta_link,
 521                                unsigned int link_id)
 522 {
 523         lockdep_assert_wiphy(mvm->hw->wiphy);
 524         lockdep_assert_held(&mvm->mutex);
 525
 526         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta_link->sta_id], NULL);
 527         RCU_INIT_POINTER(mvm->fw_id_to_link_sta[mvm_sta_link->sta_id], NULL);
 528         RCU_INIT_POINTER(mvm_sta->link[link_id], NULL);
 529
 530         if (mvm_sta_link != &mvm_sta->deflink)
 531                 kfree_rcu(mvm_sta_link, rcu_head);
 532 }
 533
 534 static void iwl_mvm_mld_sta_rm_all_sta_links(struct iwl_mvm *mvm,
 535                                              struct iwl_mvm_sta *mvm_sta)
 536 {
 537         unsigned int link_id;
 538
 539         for (link_id = 0; link_id < ARRAY_SIZE(mvm_sta->link); link_id++) {
 540                 struct iwl_mvm_link_sta *link =
 541                         rcu_dereference_protected(mvm_sta->link[link_id],
 542                                                   lockdep_is_held(&mvm->mutex));
 543
 544                 if (!link)
 545                         continue;
 546
 547                 iwl_mvm_mld_free_sta_link(mvm, mvm_sta, link, link_id);
 548         }
 549 }
 550
 551 static int iwl_mvm_mld_alloc_sta_link(struct iwl_mvm *mvm,
 552                                       struct ieee80211_vif *vif,
 553                                       struct ieee80211_sta *sta,
 554                                       unsigned int link_id)
 555 {
 556         struct ieee80211_link_sta *link_sta =
 557                 link_sta_dereference_protected(sta, link_id);
 558         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 559         struct iwl_mvm_link_sta *link;
 560         u32 sta_id = iwl_mvm_find_free_sta_id(mvm,
 561                                           ieee80211_vif_type_p2p(vif));
 562
 563         lockdep_assert_wiphy(mvm->hw->wiphy);
 564         lockdep_assert_held(&mvm->mutex);
 565
 566         if (sta_id == IWL_INVALID_STA)
 567                 return -ENOSPC;
 568
 569         if (rcu_access_pointer(sta->link[link_id]) == &sta->deflink) {
 570                 link = &mvm_sta->deflink;
 571         } else {
 572                 link = kzalloc(sizeof(*link), GFP_KERNEL);
 573                 if (!link)
 574                         return -ENOMEM;
 575         }
 576
 577         link->sta_id = sta_id;
 578         rcu_assign_pointer(mvm_sta->link[link_id], link);
 579         rcu_assign_pointer(mvm->fw_id_to_mac_id[link->sta_id], sta);
 580         rcu_assign_pointer(mvm->fw_id_to_link_sta[link->sta_id],
 581                            link_sta);
 582
 583         return 0;
 584 }
 585
 586 /* allocate all the links of a sta, called when the station is first added */
 587 static int iwl_mvm_mld_alloc_sta_links(struct iwl_mvm *mvm,
 588                                        struct ieee80211_vif *vif,
 589                                        struct ieee80211_sta *sta)
 590 {
 591         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 592         struct ieee80211_link_sta *link_sta;
 593         unsigned int link_id;
 594         int ret;
 595
 596         lockdep_assert_held(&mvm->mutex);
 597
 598         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 599                 if (WARN_ON(mvm_sta->link[link_id]))
 600                         continue;
 601
 602                 ret = iwl_mvm_mld_alloc_sta_link(mvm, vif, sta, link_id);
 603                 if (ret)
 604                         goto err;
 605         }
 606
 607         return 0;
 608
 609 err:
 610         iwl_mvm_mld_sta_rm_all_sta_links(mvm, mvm_sta);
 611         return ret;
 612 }
 613
 614 static void iwl_mvm_mld_set_ap_sta_id(struct ieee80211_sta *sta,
 615                                       struct iwl_mvm_vif_link_info *vif_link,
 616                                       struct iwl_mvm_link_sta *sta_link)
 617 {
 618         if (!sta->tdls) {
 619                 WARN_ON(vif_link->ap_sta_id != IWL_INVALID_STA);
 620                 vif_link->ap_sta_id = sta_link->sta_id;
 621         } else {
 622                 WARN_ON(vif_link->ap_sta_id == IWL_INVALID_STA);
 623         }
 624 }
 625
 626 static int iwl_mvm_alloc_sta_after_restart(struct iwl_mvm *mvm,
 627                                            struct ieee80211_vif *vif,
 628                                            struct ieee80211_sta *sta)
 629 {
 630         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 631         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 632         struct ieee80211_link_sta *link_sta;
 633         unsigned int link_id;
 634         /* no active link found */
 635         int ret = -EINVAL;
 636         int sta_id;
 637
 638         lockdep_assert_wiphy(mvm->hw->wiphy);
 639         lockdep_assert_held(&mvm->mutex);
 640
 641         /* First add an empty station since allocating a queue requires
 642          * a valid station. Since we need a link_id to allocate a station,
 643          * pick up the first valid one.
 644          */
 645         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 646                 struct iwl_mvm_vif_link_info *mvm_link;
 647                 struct ieee80211_bss_conf *link_conf =
 648                         link_conf_dereference_protected(vif, link_id);
 649                 struct iwl_mvm_link_sta *mvm_link_sta =
 650                         rcu_dereference_protected(mvm_sta->link[link_id],
 651                                                   lockdep_is_held(&mvm->mutex));
 652
 653                 if (!link_conf)
 654                         continue;
 655
 656                 mvm_link = mvmvif->link[link_conf->link_id];
 657
 658                 if (!mvm_link || !mvm_link_sta)
 659                         continue;
 660
 661                 sta_id = mvm_link_sta->sta_id;
 662                 ret = iwl_mvm_mld_cfg_sta(mvm, sta, vif, link_sta,
 663                                           link_conf, mvm_link_sta);
 664                 if (ret)
 665                         return ret;
 666
 667                 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
 668                 rcu_assign_pointer(mvm->fw_id_to_link_sta[sta_id], link_sta);
 669                 ret = 0;
 670         }
 671
 672         iwl_mvm_realloc_queues_after_restart(mvm, sta);
 673
 674         return ret;
 675 }
 676
 677 int iwl_mvm_mld_add_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 678                         struct ieee80211_sta *sta)
 679 {
 680         struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
 681         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 682         unsigned long link_sta_added_to_fw = 0;
 683         struct ieee80211_link_sta *link_sta;
 684         int ret = 0;
 685         unsigned int link_id;
 686
 687         lockdep_assert_held(&mvm->mutex);
 688
 689         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 690                 ret = iwl_mvm_mld_alloc_sta_links(mvm, vif, sta);
 691                 if (ret)
 692                         return ret;
 693
 694                 spin_lock_init(&mvm_sta->lock);
 695
 696                 ret = iwl_mvm_sta_init(mvm, vif, sta, IWL_INVALID_STA,
 697                                        STATION_TYPE_PEER);
 698         } else {
 699                 ret = iwl_mvm_alloc_sta_after_restart(mvm, vif, sta);
 700         }
 701
 702         if (ret)
 703                 goto err;
 704
 705         /* at this stage sta link pointers are already allocated */
 706         ret = iwl_mvm_mld_update_sta(mvm, vif, sta);
 707         if (ret)
 708                 goto err;
 709
 710         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 711                 struct ieee80211_bss_conf *link_conf =
 712                         link_conf_dereference_protected(vif, link_id);
 713                 struct iwl_mvm_link_sta *mvm_link_sta =
 714                         rcu_dereference_protected(mvm_sta->link[link_id],
 715                                                   lockdep_is_held(&mvm->mutex));
 716
 717                 if (WARN_ON(!link_conf || !mvm_link_sta)) {
 718                         ret = -EINVAL;
 719                         goto err;
 720                 }
 721
 722                 ret = iwl_mvm_mld_cfg_sta(mvm, sta, vif, link_sta, link_conf,
 723                                           mvm_link_sta);
 724                 if (ret)
 725                         goto err;
 726
 727                 link_sta_added_to_fw |= BIT(link_id);
 728
 729                 if (vif->type == NL80211_IFTYPE_STATION)
 730                         iwl_mvm_mld_set_ap_sta_id(sta, mvm_vif->link[link_id],
 731                                                   mvm_link_sta);
 732         }
 733         return 0;
 734
 735 err:
 736         /* remove all already allocated stations in FW */
 737         for_each_set_bit(link_id, &link_sta_added_to_fw,
 738                          IEEE80211_MLD_MAX_NUM_LINKS) {
 739                 struct iwl_mvm_link_sta *mvm_link_sta =
 740                         rcu_dereference_protected(mvm_sta->link[link_id],
 741                                                   lockdep_is_held(&mvm->mutex));
 742
 743                 iwl_mvm_mld_rm_sta_from_fw(mvm, mvm_link_sta->sta_id);
 744         }
 745
 746         /* free all sta resources in the driver */
 747         iwl_mvm_mld_sta_rm_all_sta_links(mvm, mvm_sta);
 748         return ret;
 749 }
 750
 751 int iwl_mvm_mld_update_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 752                            struct ieee80211_sta *sta)
 753 {
 754         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 755         struct ieee80211_link_sta *link_sta;
 756         unsigned int link_id;
 757         int ret = -EINVAL;
 758
 759         lockdep_assert_held(&mvm->mutex);
 760
 761         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 762                 struct ieee80211_bss_conf *link_conf =
 763                         link_conf_dereference_protected(vif, link_id);
 764                 struct iwl_mvm_link_sta *mvm_link_sta =
 765                         rcu_dereference_protected(mvm_sta->link[link_id],
 766                                                   lockdep_is_held(&mvm->mutex));
 767
 768                 if (WARN_ON(!link_conf || !mvm_link_sta))
 769                         return -EINVAL;
 770
 771                 ret = iwl_mvm_mld_cfg_sta(mvm, sta, vif, link_sta, link_conf,
 772                                           mvm_link_sta);
 773
 774                 if (ret) {
 775                         IWL_ERR(mvm, "Failed to update sta link %d\n", link_id);
 776                         break;
 777                 }
 778         }
 779
 780         return ret;
 781 }
 782
 783 static void iwl_mvm_mld_disable_sta_queues(struct iwl_mvm *mvm,
 784                                            struct ieee80211_vif *vif,
 785                                            struct ieee80211_sta *sta)
 786 {
 787         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 788         u32 sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
 789         int i;
 790
 791         lockdep_assert_held(&mvm->mutex);
 792
 793         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
 794                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
 795                         continue;
 796
 797                 iwl_mvm_mld_disable_txq(mvm, sta_mask,
 798                                         &mvm_sta->tid_data[i].txq_id, i);
 799                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
 800         }
 801
 802         for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
 803                 struct iwl_mvm_txq *mvmtxq =
 804                         iwl_mvm_txq_from_mac80211(sta->txq[i]);
 805
 806                 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
 807         }
 808 }
 809
 810 int iwl_mvm_mld_rm_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 811                        struct ieee80211_sta *sta)
 812 {
 813         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 814         struct ieee80211_link_sta *link_sta;
 815         unsigned int link_id;
 816         int ret;
 817
 818         lockdep_assert_held(&mvm->mutex);
 819
 820         /* flush its queues here since we are freeing mvm_sta */
 821         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 822                 struct iwl_mvm_link_sta *mvm_link_sta =
 823                         rcu_dereference_protected(mvm_sta->link[link_id],
 824                                                   lockdep_is_held(&mvm->mutex));
 825
 826                 if (WARN_ON(!mvm_link_sta))
 827                         return -EINVAL;
 828
 829                 ret = iwl_mvm_flush_sta_tids(mvm, mvm_link_sta->sta_id,
 830                                              0xffff);
 831                 if (ret)
 832                         return ret;
 833         }
 834
 835         ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
 836         if (ret)
 837                 return ret;
 838
 839         iwl_mvm_mld_disable_sta_queues(mvm, vif, sta);
 840
 841         for_each_sta_active_link(vif, sta, link_sta, link_id) {
 842                 struct iwl_mvm_link_sta *mvm_link_sta =
 843                         rcu_dereference_protected(mvm_sta->link[link_id],
 844                                                   lockdep_is_held(&mvm->mutex));
 845                 iwl_mvm_sta_del(mvm, vif, sta, link_sta);
 846
 847                 ret = iwl_mvm_mld_rm_sta_from_fw(mvm, mvm_link_sta->sta_id);
 848
 849                 iwl_mvm_mld_free_sta_link(mvm, mvm_sta, mvm_link_sta, link_id);
 850         }
 851         kfree(mvm_sta->mpdu_counters);
 852         mvm_sta->mpdu_counters = NULL;
 853
 854         return ret;
 855 }
 856
 857 int iwl_mvm_mld_rm_sta_id(struct iwl_mvm *mvm, u8 sta_id)
 858 {
 859         int ret;
 860
 861         lockdep_assert_wiphy(mvm->hw->wiphy);
 862         lockdep_assert_held(&mvm->mutex);
 863
 864         if (WARN_ON(sta_id == IWL_INVALID_STA))
 865                 return 0;
 866
 867         ret = iwl_mvm_mld_rm_sta_from_fw(mvm, sta_id);
 868
 869         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 870         RCU_INIT_POINTER(mvm->fw_id_to_link_sta[sta_id], NULL);
 871         return ret;
 872 }
 873
 874 void iwl_mvm_mld_sta_modify_disable_tx(struct iwl_mvm *mvm,
 875                                        struct iwl_mvm_sta *mvmsta,
 876                                        bool disable)
 877 {
 878         struct iwl_mvm_sta_disable_tx_cmd cmd;
 879         int ret;
 880
 881         cmd.sta_id = cpu_to_le32(mvmsta->deflink.sta_id);
 882         cmd.disable = cpu_to_le32(disable);
 883
 884         if (WARN_ON(iwl_mvm_has_no_host_disable_tx(mvm)))
 885                 return;
 886
 887         ret = iwl_mvm_send_cmd_pdu(mvm,
 888                                    WIDE_ID(MAC_CONF_GROUP, STA_DISABLE_TX_CMD),
 889                                    CMD_ASYNC, sizeof(cmd), &cmd);
 890         if (ret)
 891                 IWL_ERR(mvm,
 892                         "Failed to send STA_DISABLE_TX_CMD command (%d)\n",
 893                         ret);
 894 }
 895
 896 void iwl_mvm_mld_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
 897                                           struct ieee80211_sta *sta,
 898                                           bool disable)
 899 {
 900         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 901
 902         spin_lock_bh(&mvm_sta->lock);
 903
 904         if (mvm_sta->disable_tx == disable) {
 905                 spin_unlock_bh(&mvm_sta->lock);
 906                 return;
 907         }
 908
 909         iwl_mvm_mld_sta_modify_disable_tx(mvm, mvm_sta, disable);
 910
 911         spin_unlock_bh(&mvm_sta->lock);
 912 }
 913
 914 void iwl_mvm_mld_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
 915                                            struct iwl_mvm_vif *mvmvif,
 916                                            bool disable)
 917 {
 918         struct ieee80211_sta *sta;
 919         struct iwl_mvm_sta *mvm_sta;
 920         int i;
 921
 922         rcu_read_lock();
 923
 924         /* Block/unblock all the stations of the given mvmvif */
 925         for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
 926                 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
 927                 if (IS_ERR_OR_NULL(sta))
 928                         continue;
 929
 930                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 931                 if (mvm_sta->mac_id_n_color !=
 932                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
 933                         continue;
 934
 935                 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvm_sta, disable);
 936         }
 937
 938         rcu_read_unlock();
 939 }
 940
 941 static int iwl_mvm_mld_update_sta_queues(struct iwl_mvm *mvm,
 942                                          struct ieee80211_sta *sta,
 943                                          u32 old_sta_mask,
 944                                          u32 new_sta_mask)
 945 {
 946         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 947         struct iwl_scd_queue_cfg_cmd cmd = {
 948                 .operation = cpu_to_le32(IWL_SCD_QUEUE_MODIFY),
 949                 .u.modify.old_sta_mask = cpu_to_le32(old_sta_mask),
 950                 .u.modify.new_sta_mask = cpu_to_le32(new_sta_mask),
 951         };
 952         struct iwl_host_cmd hcmd = {
 953                 .id = WIDE_ID(DATA_PATH_GROUP, SCD_QUEUE_CONFIG_CMD),
 954                 .len[0] = sizeof(cmd),
 955                 .data[0] = &cmd
 956         };
 957         int tid;
 958         int ret;
 959
 960         lockdep_assert_held(&mvm->mutex);
 961
 962         for (tid = 0; tid <= IWL_MAX_TID_COUNT; tid++) {
 963                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[tid];
 964                 int txq_id = tid_data->txq_id;
 965
 966                 if (txq_id == IWL_MVM_INVALID_QUEUE)
 967                         continue;
 968
 969                 if (tid == IWL_MAX_TID_COUNT)
 970                         cmd.u.modify.tid = cpu_to_le32(IWL_MGMT_TID);
 971                 else
 972                         cmd.u.modify.tid = cpu_to_le32(tid);
 973
 974                 ret = iwl_mvm_send_cmd(mvm, &hcmd);
 975                 if (ret)
 976                         return ret;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static int iwl_mvm_mld_update_sta_baids(struct iwl_mvm *mvm,
 983                                         u32 old_sta_mask,
 984                                         u32 new_sta_mask)
 985 {
 986         struct iwl_rx_baid_cfg_cmd cmd = {
 987                 .action = cpu_to_le32(IWL_RX_BAID_ACTION_MODIFY),
 988                 .modify.old_sta_id_mask = cpu_to_le32(old_sta_mask),
 989                 .modify.new_sta_id_mask = cpu_to_le32(new_sta_mask),
 990         };
 991         u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD);
 992         int baid;
 993
 994         /* mac80211 will remove sessions later, but we ignore all that */
 995         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 996                 return 0;
 997
 998         BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
 999
1000         for (baid = 0; baid < ARRAY_SIZE(mvm->baid_map); baid++) {
1001                 struct iwl_mvm_baid_data *data;
1002                 int ret;
1003
1004                 data = rcu_dereference_protected(mvm->baid_map[baid],
1005                                                  lockdep_is_held(&mvm->mutex));
1006                 if (!data)
1007                         continue;
1008
1009                 if (!(data->sta_mask & old_sta_mask))
1010                         continue;
1011
1012                 WARN_ONCE(data->sta_mask != old_sta_mask,
1013                           "BAID data for %d corrupted - expected 0x%x found 0x%x\n",
1014                           baid, old_sta_mask, data->sta_mask);
1015
1016                 cmd.modify.tid = cpu_to_le32(data->tid);
1017
1018                 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_SEND_IN_RFKILL,
1019                                            sizeof(cmd), &cmd);
1020                 data->sta_mask = new_sta_mask;
1021                 if (ret)
1022                         return ret;
1023         }
1024
1025         return 0;
1026 }
1027
1028 static int iwl_mvm_mld_update_sta_resources(struct iwl_mvm *mvm,
1029                                             struct ieee80211_vif *vif,
1030                                             struct ieee80211_sta *sta,
1031                                             u32 old_sta_mask,
1032                                             u32 new_sta_mask)
1033 {
1034         int ret;
1035
1036         ret = iwl_mvm_mld_update_sta_queues(mvm, sta,
1037                                             old_sta_mask,
1038                                             new_sta_mask);
1039         if (ret)
1040                 return ret;
1041
1042         ret = iwl_mvm_mld_update_sta_keys(mvm, vif, sta,
1043                                           old_sta_mask,
1044                                           new_sta_mask);
1045         if (ret)
1046                 return ret;
1047
1048         return iwl_mvm_mld_update_sta_baids(mvm, old_sta_mask, new_sta_mask);
1049 }
1050
1051 int iwl_mvm_mld_update_sta_links(struct iwl_mvm *mvm,
1052                                  struct ieee80211_vif *vif,
1053                                  struct ieee80211_sta *sta,
1054                                  u16 old_links, u16 new_links)
1055 {
1056         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1057         struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
1058         struct iwl_mvm_link_sta *mvm_sta_link;
1059         struct iwl_mvm_vif_link_info *mvm_vif_link;
1060         unsigned long links_to_add = ~old_links & new_links;
1061         unsigned long links_to_rem = old_links & ~new_links;
1062         unsigned long old_links_long = old_links;
1063         u32 current_sta_mask = 0, sta_mask_added = 0, sta_mask_to_rem = 0;
1064         unsigned long link_sta_added_to_fw = 0, link_sta_allocated = 0;
1065         unsigned int link_id;
1066         int ret;
1067
1068         lockdep_assert_wiphy(mvm->hw->wiphy);
1069         lockdep_assert_held(&mvm->mutex);
1070
1071         for_each_set_bit(link_id, &old_links_long,
1072                          IEEE80211_MLD_MAX_NUM_LINKS) {
1073                 mvm_sta_link =
1074                         rcu_dereference_protected(mvm_sta->link[link_id],
1075                                                   lockdep_is_held(&mvm->mutex));
1076
1077                 if (WARN_ON(!mvm_sta_link)) {
1078                         ret = -EINVAL;
1079                         goto err;
1080                 }
1081
1082                 current_sta_mask |= BIT(mvm_sta_link->sta_id);
1083                 if (links_to_rem & BIT(link_id))
1084                         sta_mask_to_rem |= BIT(mvm_sta_link->sta_id);
1085         }
1086
1087         if (sta_mask_to_rem) {
1088                 ret = iwl_mvm_mld_update_sta_resources(mvm, vif, sta,
1089                                                        current_sta_mask,
1090                                                        current_sta_mask &
1091                                                         ~sta_mask_to_rem);
1092                 if (WARN_ON(ret))
1093                         goto err;
1094
1095                 current_sta_mask &= ~sta_mask_to_rem;
1096         }
1097
1098         for_each_set_bit(link_id, &links_to_rem, IEEE80211_MLD_MAX_NUM_LINKS) {
1099                 mvm_sta_link =
1100                         rcu_dereference_protected(mvm_sta->link[link_id],
1101                                                   lockdep_is_held(&mvm->mutex));
1102                 mvm_vif_link = mvm_vif->link[link_id];
1103
1104                 if (WARN_ON(!mvm_sta_link || !mvm_vif_link)) {
1105                         ret = -EINVAL;
1106                         goto err;
1107                 }
1108
1109                 ret = iwl_mvm_mld_rm_sta_from_fw(mvm, mvm_sta_link->sta_id);
1110                 if (WARN_ON(ret))
1111                         goto err;
1112
1113                 if (vif->type == NL80211_IFTYPE_STATION)
1114                         mvm_vif_link->ap_sta_id = IWL_INVALID_STA;
1115
1116                 iwl_mvm_mld_free_sta_link(mvm, mvm_sta, mvm_sta_link, link_id);
1117         }
1118
1119         for_each_set_bit(link_id, &links_to_add, IEEE80211_MLD_MAX_NUM_LINKS) {
1120                 struct ieee80211_bss_conf *link_conf =
1121                         link_conf_dereference_protected(vif, link_id);
1122                 struct ieee80211_link_sta *link_sta =
1123                         link_sta_dereference_protected(sta, link_id);
1124                 mvm_vif_link = mvm_vif->link[link_id];
1125
1126                 if (WARN_ON(!mvm_vif_link || !link_conf || !link_sta)) {
1127                         ret = -EINVAL;
1128                         goto err;
1129                 }
1130
1131                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1132                         struct iwl_mvm_link_sta *mvm_link_sta =
1133                                 rcu_dereference_protected(mvm_sta->link[link_id],
1134                                                           lockdep_is_held(&mvm->mutex));
1135                         u32 sta_id;
1136
1137                         if (WARN_ON(!mvm_link_sta)) {
1138                                 ret = -EINVAL;
1139                                 goto err;
1140                         }
1141
1142                         sta_id = mvm_link_sta->sta_id;
1143
1144                         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1145                         rcu_assign_pointer(mvm->fw_id_to_link_sta[sta_id],
1146                                            link_sta);
1147                 } else {
1148                         if (WARN_ON(mvm_sta->link[link_id])) {
1149                                 ret = -EINVAL;
1150                                 goto err;
1151                         }
1152                         ret = iwl_mvm_mld_alloc_sta_link(mvm, vif, sta,
1153                                                          link_id);
1154                         if (WARN_ON(ret))
1155                                 goto err;
1156                 }
1157
1158                 link_sta->agg.max_rc_amsdu_len = 1;
1159                 ieee80211_sta_recalc_aggregates(sta);
1160
1161                 mvm_sta_link =
1162                         rcu_dereference_protected(mvm_sta->link[link_id],
1163                                                   lockdep_is_held(&mvm->mutex));
1164
1165                 if (WARN_ON(!mvm_sta_link)) {
1166                         ret = -EINVAL;
1167                         goto err;
1168                 }
1169
1170                 if (vif->type == NL80211_IFTYPE_STATION)
1171                         iwl_mvm_mld_set_ap_sta_id(sta, mvm_vif_link,
1172                                                   mvm_sta_link);
1173
1174                 link_sta_allocated |= BIT(link_id);
1175
1176                 sta_mask_added |= BIT(mvm_sta_link->sta_id);
1177
1178                 ret = iwl_mvm_mld_cfg_sta(mvm, sta, vif, link_sta, link_conf,
1179                                           mvm_sta_link);
1180                 if (WARN_ON(ret))
1181                         goto err;
1182
1183                 link_sta_added_to_fw |= BIT(link_id);
1184
1185                 iwl_mvm_rs_add_sta_link(mvm, mvm_sta_link);
1186
1187                 iwl_mvm_rs_rate_init(mvm, vif, sta, link_conf, link_sta,
1188                                      link_conf->chanreq.oper.chan->band);
1189         }
1190
1191         if (sta_mask_added) {
1192                 ret = iwl_mvm_mld_update_sta_resources(mvm, vif, sta,
1193                                                        current_sta_mask,
1194                                                        current_sta_mask |
1195                                                         sta_mask_added);
1196                 if (WARN_ON(ret))
1197                         goto err;
1198         }
1199
1200         return 0;
1201
1202 err:
1203         /* remove all already allocated stations in FW */
1204         for_each_set_bit(link_id, &link_sta_added_to_fw,
1205                          IEEE80211_MLD_MAX_NUM_LINKS) {
1206                 mvm_sta_link =
1207                         rcu_dereference_protected(mvm_sta->link[link_id],
1208                                                   lockdep_is_held(&mvm->mutex));
1209
1210                 iwl_mvm_mld_rm_sta_from_fw(mvm, mvm_sta_link->sta_id);
1211         }
1212
1213         /* remove all already allocated station links in driver */
1214         for_each_set_bit(link_id, &link_sta_allocated,
1215                          IEEE80211_MLD_MAX_NUM_LINKS) {
1216                 mvm_sta_link =
1217                         rcu_dereference_protected(mvm_sta->link[link_id],
1218                                                   lockdep_is_held(&mvm->mutex));
1219
1220                 iwl_mvm_mld_free_sta_link(mvm, mvm_sta, mvm_sta_link, link_id);
1221         }
1222
1223         return ret;
1224 }