drivers/net/wireless/iwlwifi/mvm/mac80211.c

   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) 2012 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
  38  * are met:
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/kernel.h>
  64 #include <linux/slab.h>
  65 #include <linux/skbuff.h>
  66 #include <linux/netdevice.h>
  67 #include <linux/etherdevice.h>
  68 #include <linux/ip.h>
  69 #include <net/mac80211.h>
  70 #include <net/tcp.h>
  71
  72 #include "iwl-op-mode.h"
  73 #include "iwl-io.h"
  74 #include "mvm.h"
  75 #include "sta.h"
  76 #include "time-event.h"
  77 #include "iwl-eeprom-parse.h"
  78 #include "fw-api-scan.h"
  79 #include "iwl-phy-db.h"
  80
  81 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  82         {
  83                 .max = 1,
  84                 .types = BIT(NL80211_IFTYPE_STATION) |
  85                         BIT(NL80211_IFTYPE_AP),
  86         },
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT) |
  90                         BIT(NL80211_IFTYPE_P2P_GO),
  91         },
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
  95         },
  96 };
  97
  98 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
  99         {
 100                 .num_different_channels = 1,
 101                 .max_interfaces = 3,
 102                 .limits = iwl_mvm_limits,
 103                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 104         },
 105 };
 106
 107 #ifdef CONFIG_PM_SLEEP
 108 static const struct nl80211_wowlan_tcp_data_token_feature
 109 iwl_mvm_wowlan_tcp_token_feature = {
 110         .min_len = 0,
 111         .max_len = 255,
 112         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 113 };
 114
 115 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 116         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 117         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 118                             sizeof(struct ethhdr) -
 119                             sizeof(struct iphdr) -
 120                             sizeof(struct tcphdr),
 121         .data_interval_max = 65535, /* __le16 in API */
 122         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .seq = true,
 127 };
 128 #endif
 129
 130 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 131 {
 132         struct ieee80211_hw *hw = mvm->hw;
 133         int num_mac, ret, i;
 134
 135         /* Tell mac80211 our characteristics */
 136         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 137                     IEEE80211_HW_SPECTRUM_MGMT |
 138                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 139                     IEEE80211_HW_QUEUE_CONTROL |
 140                     IEEE80211_HW_WANT_MONITOR_VIF |
 141                     IEEE80211_HW_SUPPORTS_PS |
 142                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 143                     IEEE80211_HW_AMPDU_AGGREGATION |
 144                     IEEE80211_HW_TIMING_BEACON_ONLY;
 145
 146         hw->queues = IWL_MVM_FIRST_AGG_QUEUE;
 147         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 148         hw->rate_control_algorithm = "iwl-mvm-rs";
 149
 150         /*
 151          * Enable 11w if advertised by firmware and software crypto
 152          * is not enabled (as the firmware will interpret some mgmt
 153          * packets, so enabling it with software crypto isn't safe)
 154          */
 155         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 156             !iwlwifi_mod_params.sw_crypto)
 157                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 158
 159         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 160         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 161         hw->chanctx_data_size = sizeof(struct iwl_mvm_phy_ctxt);
 162
 163         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 164                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 165                 BIT(NL80211_IFTYPE_AP) |
 166                 BIT(NL80211_IFTYPE_P2P_GO) |
 167                 BIT(NL80211_IFTYPE_P2P_DEVICE);
 168
 169         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 170                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 171                             WIPHY_FLAG_IBSS_RSN;
 172
 173         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 174         hw->wiphy->n_iface_combinations =
 175                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 176
 177         hw->wiphy->max_remain_on_channel_duration = 10000;
 178         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 179
 180         /* Extract MAC address */
 181         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 182         hw->wiphy->addresses = mvm->addresses;
 183         hw->wiphy->n_addresses = 1;
 184
 185         /* Extract additional MAC addresses if available */
 186         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 187                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 188
 189         for (i = 1; i < num_mac; i++) {
 190                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 191                        ETH_ALEN);
 192                 mvm->addresses[i].addr[5]++;
 193                 hw->wiphy->n_addresses++;
 194         }
 195
 196         /* we create the 802.11 header and a max-length SSID element */
 197         hw->wiphy->max_scan_ie_len =
 198                 mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 199         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 200
 201         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 202                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 203                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 204         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 205                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 206                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 207
 208         hw->wiphy->hw_version = mvm->trans->hw_id;
 209
 210         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 211                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 212         else
 213                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 214
 215         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 216                                NL80211_FEATURE_P2P_GO_OPPPS;
 217
 218         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 219
 220 #ifdef CONFIG_PM_SLEEP
 221         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 222             mvm->trans->ops->d3_suspend &&
 223             mvm->trans->ops->d3_resume &&
 224             device_can_wakeup(mvm->trans->dev)) {
 225                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 226                                           WIPHY_WOWLAN_DISCONNECT |
 227                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 228                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 229                 if (!iwlwifi_mod_params.sw_crypto)
 230                         hw->wiphy->wowlan.flags |=
 231                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 232                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 233                                 WIPHY_WOWLAN_4WAY_HANDSHAKE;
 234
 235                 hw->wiphy->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 236                 hw->wiphy->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 237                 hw->wiphy->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 238                 hw->wiphy->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 239         }
 240 #endif
 241
 242         ret = iwl_mvm_leds_init(mvm);
 243         if (ret)
 244                 return ret;
 245
 246         ret = ieee80211_register_hw(mvm->hw);
 247         if (ret)
 248                 iwl_mvm_leds_exit(mvm);
 249
 250         return ret;
 251 }
 252
 253 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 254                            struct ieee80211_tx_control *control,
 255                            struct sk_buff *skb)
 256 {
 257         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 258
 259         if (test_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status)) {
 260                 IWL_DEBUG_DROP(mvm, "Dropping - RF KILL\n");
 261                 goto drop;
 262         }
 263
 264         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 265             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 266                 goto drop;
 267
 268         if (control->sta) {
 269                 if (iwl_mvm_tx_skb(mvm, skb, control->sta))
 270                         goto drop;
 271                 return;
 272         }
 273
 274         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 275                 goto drop;
 276         return;
 277  drop:
 278         ieee80211_free_txskb(hw, skb);
 279 }
 280
 281 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 282 {
 283         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 284                 return false;
 285         return true;
 286 }
 287
 288 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 289 {
 290         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 291                 return false;
 292         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 293                 return true;
 294
 295         /* enabled by default */
 296         return true;
 297 }
 298
 299 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 300                                     struct ieee80211_vif *vif,
 301                                     enum ieee80211_ampdu_mlme_action action,
 302                                     struct ieee80211_sta *sta, u16 tid,
 303                                     u16 *ssn, u8 buf_size)
 304 {
 305         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 306         int ret;
 307
 308         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 309                      sta->addr, tid, action);
 310
 311         if (!(mvm->nvm_data->sku_cap_11n_enable))
 312                 return -EACCES;
 313
 314         mutex_lock(&mvm->mutex);
 315
 316         switch (action) {
 317         case IEEE80211_AMPDU_RX_START:
 318                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 319                         ret = -EINVAL;
 320                         break;
 321                 }
 322                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 323                 break;
 324         case IEEE80211_AMPDU_RX_STOP:
 325                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 326                 break;
 327         case IEEE80211_AMPDU_TX_START:
 328                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 329                         ret = -EINVAL;
 330                         break;
 331                 }
 332                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 333                 break;
 334         case IEEE80211_AMPDU_TX_STOP_CONT:
 335                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 336                 break;
 337         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 338         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 339                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 340                 break;
 341         case IEEE80211_AMPDU_TX_OPERATIONAL:
 342                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 343                 break;
 344         default:
 345                 WARN_ON_ONCE(1);
 346                 ret = -EINVAL;
 347                 break;
 348         }
 349         mutex_unlock(&mvm->mutex);
 350
 351         return ret;
 352 }
 353
 354 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 355                                      struct ieee80211_vif *vif)
 356 {
 357         struct iwl_mvm *mvm = data;
 358         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 359
 360         mvmvif->uploaded = false;
 361         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 362
 363         /* does this make sense at all? */
 364         mvmvif->color++;
 365
 366         spin_lock_bh(&mvm->time_event_lock);
 367         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 368         spin_unlock_bh(&mvm->time_event_lock);
 369
 370         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 371                 mvmvif->phy_ctxt = NULL;
 372 }
 373
 374 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 375 {
 376         iwl_trans_stop_device(mvm->trans);
 377         iwl_trans_stop_hw(mvm->trans, false);
 378
 379         mvm->scan_status = IWL_MVM_SCAN_NONE;
 380
 381         /* just in case one was running */
 382         ieee80211_remain_on_channel_expired(mvm->hw);
 383
 384         ieee80211_iterate_active_interfaces_atomic(
 385                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 386                 iwl_mvm_cleanup_iterator, mvm);
 387
 388         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 389         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 390
 391         ieee80211_wake_queues(mvm->hw);
 392
 393         mvm->vif_count = 0;
 394 }
 395
 396 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 397 {
 398         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 399         int ret;
 400
 401         mutex_lock(&mvm->mutex);
 402
 403         /* Clean up some internal and mac80211 state on restart */
 404         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 405                 iwl_mvm_restart_cleanup(mvm);
 406
 407         ret = iwl_mvm_up(mvm);
 408         mutex_unlock(&mvm->mutex);
 409
 410         return ret;
 411 }
 412
 413 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 414 {
 415         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 416         int ret;
 417
 418         mutex_lock(&mvm->mutex);
 419
 420         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 421         ret = iwl_mvm_update_quotas(mvm, NULL);
 422         if (ret)
 423                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 424                         ret);
 425
 426         mutex_unlock(&mvm->mutex);
 427 }
 428
 429 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 430 {
 431         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 432
 433         flush_work(&mvm->async_handlers_wk);
 434
 435         mutex_lock(&mvm->mutex);
 436         /* async_handlers_wk is now blocked */
 437
 438         /*
 439          * The work item could be running or queued if the
 440          * ROC time event stops just as we get here.
 441          */
 442         cancel_work_sync(&mvm->roc_done_wk);
 443
 444         iwl_trans_stop_device(mvm->trans);
 445         iwl_trans_stop_hw(mvm->trans, false);
 446
 447         iwl_mvm_async_handlers_purge(mvm);
 448         /* async_handlers_list is empty and will stay empty: HW is stopped */
 449
 450         /* the fw is stopped, the aux sta is dead: clean up driver state */
 451         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 452
 453         mutex_unlock(&mvm->mutex);
 454
 455         /*
 456          * The worker might have been waiting for the mutex, let it run and
 457          * discover that its list is now empty.
 458          */
 459         cancel_work_sync(&mvm->async_handlers_wk);
 460 }
 461
 462 static void iwl_mvm_pm_disable_iterator(void *data, u8 *mac,
 463                                         struct ieee80211_vif *vif)
 464 {
 465         struct iwl_mvm *mvm = data;
 466         int ret;
 467
 468         ret = iwl_mvm_power_disable(mvm, vif);
 469         if (ret)
 470                 IWL_ERR(mvm, "failed to disable power management\n");
 471 }
 472
 473 static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
 474                                           struct ieee80211_vif *vif)
 475 {
 476         struct iwl_mvm *mvm = data;
 477
 478         iwl_mvm_power_update_mode(mvm, vif);
 479 }
 480
 481 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 482                                      struct ieee80211_vif *vif)
 483 {
 484         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 485         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 486         int ret;
 487
 488         /*
 489          * Not much to do here. The stack will not allow interface
 490          * types or combinations that we didn't advertise, so we
 491          * don't really have to check the types.
 492          */
 493
 494         mutex_lock(&mvm->mutex);
 495
 496         /* Allocate resources for the MAC context, and add it the the fw  */
 497         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 498         if (ret)
 499                 goto out_unlock;
 500
 501         /*
 502          * The AP binding flow can be done only after the beacon
 503          * template is configured (which happens only in the mac80211
 504          * start_ap() flow), and adding the broadcast station can happen
 505          * only after the binding.
 506          * In addition, since modifying the MAC before adding a bcast
 507          * station is not allowed by the FW, delay the adding of MAC context to
 508          * the point where we can also add the bcast station.
 509          * In short: there's not much we can do at this point, other than
 510          * allocating resources :)
 511          */
 512         if (vif->type == NL80211_IFTYPE_AP) {
 513                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 514                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 515                                                qmask);
 516                 if (ret) {
 517                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 518                         goto out_release;
 519                 }
 520
 521                 goto out_unlock;
 522         }
 523
 524         /*
 525          * TODO: remove this temporary code.
 526          * Currently MVM FW supports power management only on single MAC.
 527          * If new interface added, disable PM on existing interface.
 528          * P2P device is a special case, since it is handled by FW similary to
 529          * scan. If P2P deviced is added, PM remains enabled on existing
 530          * interface.
 531          * Note: the method below does not count the new interface being added
 532          * at this moment.
 533          */
 534         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 535                 mvm->vif_count++;
 536         if (mvm->vif_count > 1) {
 537                 IWL_DEBUG_MAC80211(mvm,
 538                                    "Disable power on existing interfaces\n");
 539                 ieee80211_iterate_active_interfaces_atomic(
 540                                             mvm->hw,
 541                                             IEEE80211_IFACE_ITER_NORMAL,
 542                                             iwl_mvm_pm_disable_iterator, mvm);
 543         }
 544
 545         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 546         if (ret)
 547                 goto out_release;
 548
 549         /*
 550          * Update power state on the new interface. Admittedly, based on
 551          * mac80211 logics this power update will disable power management
 552          */
 553         iwl_mvm_power_update_mode(mvm, vif);
 554
 555         /*
 556          * P2P_DEVICE interface does not have a channel context assigned to it,
 557          * so a dedicated PHY context is allocated to it and the corresponding
 558          * MAC context is bound to it at this stage.
 559          */
 560         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 561                 struct ieee80211_channel *chan;
 562                 struct cfg80211_chan_def chandef;
 563
 564                 mvmvif->phy_ctxt = &mvm->phy_ctxt_roc;
 565
 566                 /*
 567                  * The channel used here isn't relevant as it's
 568                  * going to be overwritten as part of the ROC flow.
 569                  * For now use the first channel we have.
 570                  */
 571                 chan = &mvm->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
 572                 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
 573                 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt,
 574                                            &chandef, 1, 1);
 575                 if (ret)
 576                         goto out_remove_mac;
 577
 578                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 579                 if (ret)
 580                         goto out_remove_phy;
 581
 582                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 583                 if (ret)
 584                         goto out_unbind;
 585
 586                 /* Save a pointer to p2p device vif, so it can later be used to
 587                  * update the p2p device MAC when a GO is started/stopped */
 588                 mvm->p2p_device_vif = vif;
 589         }
 590
 591         iwl_mvm_vif_dbgfs_register(mvm, vif);
 592         goto out_unlock;
 593
 594  out_unbind:
 595         iwl_mvm_binding_remove_vif(mvm, vif);
 596  out_remove_phy:
 597         iwl_mvm_phy_ctxt_remove(mvm, mvmvif->phy_ctxt);
 598  out_remove_mac:
 599         mvmvif->phy_ctxt = NULL;
 600         iwl_mvm_mac_ctxt_remove(mvm, vif);
 601  out_release:
 602         /*
 603          * TODO: remove this temporary code.
 604          * Currently MVM FW supports power management only on single MAC.
 605          * Check if only one additional interface remains after releasing
 606          * current one. Update power mode on the remaining interface.
 607          */
 608         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 609                 mvm->vif_count--;
 610         IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 611                            mvm->vif_count);
 612         if (mvm->vif_count == 1) {
 613                 ieee80211_iterate_active_interfaces(
 614                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 615                                         iwl_mvm_power_update_iterator, mvm);
 616         }
 617         iwl_mvm_mac_ctxt_release(mvm, vif);
 618  out_unlock:
 619         mutex_unlock(&mvm->mutex);
 620
 621         return ret;
 622 }
 623
 624 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 625                                         struct ieee80211_vif *vif)
 626 {
 627         u32 tfd_msk = 0, ac;
 628
 629         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 630                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 631                         tfd_msk |= BIT(vif->hw_queue[ac]);
 632
 633         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 634                 tfd_msk |= BIT(vif->cab_queue);
 635
 636         if (tfd_msk) {
 637                 mutex_lock(&mvm->mutex);
 638                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 639                 mutex_unlock(&mvm->mutex);
 640         }
 641
 642         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 643                 /*
 644                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 645                  * We assume here that all the packets sent to the OFFCHANNEL
 646                  * queue are sent in ROC session.
 647                  */
 648                 flush_work(&mvm->roc_done_wk);
 649         } else {
 650                 /*
 651                  * By now, all the AC queues are empty. The AGG queues are
 652                  * empty too. We already got all the Tx responses for all the
 653                  * packets in the queues. The drain work can have been
 654                  * triggered. Flush it. This work item takes the mutex, so kill
 655                  * it before we take it.
 656                  */
 657                 flush_work(&mvm->sta_drained_wk);
 658         }
 659 }
 660
 661 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 662                                          struct ieee80211_vif *vif)
 663 {
 664         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 665         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 666
 667         iwl_mvm_prepare_mac_removal(mvm, vif);
 668
 669         mutex_lock(&mvm->mutex);
 670
 671         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 672
 673         /*
 674          * For AP/GO interface, the tear down of the resources allocated to the
 675          * interface is be handled as part of the stop_ap flow.
 676          */
 677         if (vif->type == NL80211_IFTYPE_AP) {
 678                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 679                 goto out_release;
 680         }
 681
 682         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 683                 mvm->p2p_device_vif = NULL;
 684                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 685                 iwl_mvm_binding_remove_vif(mvm, vif);
 686                 iwl_mvm_phy_ctxt_remove(mvm, mvmvif->phy_ctxt);
 687                 mvmvif->phy_ctxt = NULL;
 688         }
 689
 690         /*
 691          * TODO: remove this temporary code.
 692          * Currently MVM FW supports power management only on single MAC.
 693          * Check if only one additional interface remains after removing
 694          * current one. Update power mode on the remaining interface.
 695          */
 696         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 697                 mvm->vif_count--;
 698         IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 699                            mvm->vif_count);
 700         if (mvm->vif_count == 1) {
 701                 ieee80211_iterate_active_interfaces(
 702                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 703                                         iwl_mvm_power_update_iterator, mvm);
 704         }
 705
 706         iwl_mvm_mac_ctxt_remove(mvm, vif);
 707
 708 out_release:
 709         iwl_mvm_mac_ctxt_release(mvm, vif);
 710         mutex_unlock(&mvm->mutex);
 711 }
 712
 713 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 714 {
 715         return 0;
 716 }
 717
 718 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
 719                                      unsigned int changed_flags,
 720                                      unsigned int *total_flags,
 721                                      u64 multicast)
 722 {
 723         *total_flags = 0;
 724 }
 725
 726 static int iwl_mvm_configure_mcast_filter(struct iwl_mvm *mvm,
 727                                           struct ieee80211_vif *vif)
 728 {
 729         struct iwl_mcast_filter_cmd mcast_filter_cmd = {
 730                 .pass_all = 1,
 731         };
 732
 733         memcpy(mcast_filter_cmd.bssid, vif->bss_conf.bssid, ETH_ALEN);
 734
 735         return iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC,
 736                                     sizeof(mcast_filter_cmd),
 737                                     &mcast_filter_cmd);
 738 }
 739
 740 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 741                                              struct ieee80211_vif *vif,
 742                                              struct ieee80211_bss_conf *bss_conf,
 743                                              u32 changes)
 744 {
 745         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 746         int ret;
 747
 748         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 749         if (ret)
 750                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
 751
 752         if (changes & BSS_CHANGED_ASSOC) {
 753                 if (bss_conf->assoc) {
 754                         /* add quota for this interface */
 755                         ret = iwl_mvm_update_quotas(mvm, vif);
 756                         if (ret) {
 757                                 IWL_ERR(mvm, "failed to update quotas\n");
 758                                 return;
 759                         }
 760                         iwl_mvm_bt_coex_vif_assoc(mvm, vif);
 761                         iwl_mvm_configure_mcast_filter(mvm, vif);
 762                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
 763                         /* remove AP station now that the MAC is unassoc */
 764                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
 765                         if (ret)
 766                                 IWL_ERR(mvm, "failed to remove AP station\n");
 767                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 768                         /* remove quota for this interface */
 769                         ret = iwl_mvm_update_quotas(mvm, NULL);
 770                         if (ret)
 771                                 IWL_ERR(mvm, "failed to update quotas\n");
 772                 }
 773         } else if (changes & BSS_CHANGED_DTIM_PERIOD) {
 774                 /*
 775                  * We received a beacon _after_ association so
 776                  * remove the session protection.
 777                  */
 778                 iwl_mvm_remove_time_event(mvm, mvmvif,
 779                                           &mvmvif->time_event_data);
 780         } else if (changes & BSS_CHANGED_PS) {
 781                 /*
 782                  * TODO: remove this temporary code.
 783                  * Currently MVM FW supports power management only on single
 784                  * MAC. Avoid power mode update if more than one interface
 785                  * is active.
 786                  */
 787                 IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 788                                    mvm->vif_count);
 789                 if (mvm->vif_count == 1) {
 790                         ret = iwl_mvm_power_update_mode(mvm, vif);
 791                         if (ret)
 792                                 IWL_ERR(mvm, "failed to update power mode\n");
 793                 }
 794         }
 795 }
 796
 797 static int iwl_mvm_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 798 {
 799         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 800         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 801         int ret;
 802
 803         mutex_lock(&mvm->mutex);
 804
 805         /* Send the beacon template */
 806         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
 807         if (ret)
 808                 goto out_unlock;
 809
 810         /* Add the mac context */
 811         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 812         if (ret)
 813                 goto out_unlock;
 814
 815         /* Perform the binding */
 816         ret = iwl_mvm_binding_add_vif(mvm, vif);
 817         if (ret)
 818                 goto out_remove;
 819
 820         mvmvif->ap_active = true;
 821
 822         /* Send the bcast station. At this stage the TBTT and DTIM time events
 823          * are added and applied to the scheduler */
 824         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 825         if (ret)
 826                 goto out_unbind;
 827
 828         ret = iwl_mvm_update_quotas(mvm, vif);
 829         if (ret)
 830                 goto out_rm_bcast;
 831
 832         /* Need to update the P2P Device MAC */
 833         if (vif->p2p && mvm->p2p_device_vif)
 834                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 835
 836         mutex_unlock(&mvm->mutex);
 837         return 0;
 838
 839 out_rm_bcast:
 840         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 841 out_unbind:
 842         iwl_mvm_binding_remove_vif(mvm, vif);
 843 out_remove:
 844         iwl_mvm_mac_ctxt_remove(mvm, vif);
 845 out_unlock:
 846         mutex_unlock(&mvm->mutex);
 847         return ret;
 848 }
 849
 850 static void iwl_mvm_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 851 {
 852         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 853         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 854
 855         iwl_mvm_prepare_mac_removal(mvm, vif);
 856
 857         mutex_lock(&mvm->mutex);
 858
 859         mvmvif->ap_active = false;
 860
 861         /* Need to update the P2P Device MAC */
 862         if (vif->p2p && mvm->p2p_device_vif)
 863                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 864
 865         iwl_mvm_update_quotas(mvm, NULL);
 866         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 867         iwl_mvm_binding_remove_vif(mvm, vif);
 868         iwl_mvm_mac_ctxt_remove(mvm, vif);
 869
 870         mutex_unlock(&mvm->mutex);
 871 }
 872
 873 static void iwl_mvm_bss_info_changed_ap(struct iwl_mvm *mvm,
 874                                         struct ieee80211_vif *vif,
 875                                         struct ieee80211_bss_conf *bss_conf,
 876                                         u32 changes)
 877 {
 878         /* Need to send a new beacon template to the FW */
 879         if (changes & BSS_CHANGED_BEACON) {
 880                 if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
 881                         IWL_WARN(mvm, "Failed updating beacon data\n");
 882         }
 883 }
 884
 885 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
 886                                      struct ieee80211_vif *vif,
 887                                      struct ieee80211_bss_conf *bss_conf,
 888                                      u32 changes)
 889 {
 890         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 891
 892         mutex_lock(&mvm->mutex);
 893
 894         switch (vif->type) {
 895         case NL80211_IFTYPE_STATION:
 896                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
 897                 break;
 898         case NL80211_IFTYPE_AP:
 899                 iwl_mvm_bss_info_changed_ap(mvm, vif, bss_conf, changes);
 900                 break;
 901         default:
 902                 /* shouldn't happen */
 903                 WARN_ON_ONCE(1);
 904         }
 905
 906         mutex_unlock(&mvm->mutex);
 907 }
 908
 909 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
 910                                struct ieee80211_vif *vif,
 911                                struct cfg80211_scan_request *req)
 912 {
 913         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 914         int ret;
 915
 916         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
 917                 return -EINVAL;
 918
 919         mutex_lock(&mvm->mutex);
 920
 921         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
 922                 ret = iwl_mvm_scan_request(mvm, vif, req);
 923         else
 924                 ret = -EBUSY;
 925
 926         mutex_unlock(&mvm->mutex);
 927
 928         return ret;
 929 }
 930
 931 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
 932                                        struct ieee80211_vif *vif)
 933 {
 934         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 935
 936         mutex_lock(&mvm->mutex);
 937
 938         iwl_mvm_cancel_scan(mvm);
 939
 940         mutex_unlock(&mvm->mutex);
 941 }
 942
 943 static void
 944 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
 945                                   struct ieee80211_sta *sta, u16 tid,
 946                                   int num_frames,
 947                                   enum ieee80211_frame_release_type reason,
 948                                   bool more_data)
 949 {
 950         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 951
 952         /* TODO: how do we tell the fw to send frames for a specific TID */
 953
 954         /*
 955          * The fw will send EOSP notification when the last frame will be
 956          * transmitted.
 957          */
 958         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
 959 }
 960
 961 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
 962                                    struct ieee80211_vif *vif,
 963                                    enum sta_notify_cmd cmd,
 964                                    struct ieee80211_sta *sta)
 965 {
 966         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 967         struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
 968
 969         switch (cmd) {
 970         case STA_NOTIFY_SLEEP:
 971                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
 972                         ieee80211_sta_block_awake(hw, sta, true);
 973                 /*
 974                  * The fw updates the STA to be asleep. Tx packets on the Tx
 975                  * queues to this station will not be transmitted. The fw will
 976                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
 977                  */
 978                 break;
 979         case STA_NOTIFY_AWAKE:
 980                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
 981                         break;
 982                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
 983                 break;
 984         default:
 985                 break;
 986         }
 987 }
 988
 989 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
 990                                  struct ieee80211_vif *vif,
 991                                  struct ieee80211_sta *sta,
 992                                  enum ieee80211_sta_state old_state,
 993                                  enum ieee80211_sta_state new_state)
 994 {
 995         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 996         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 997         int ret;
 998
 999         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1000                            sta->addr, old_state, new_state);
1001
1002         /* this would be a mac80211 bug ... but don't crash */
1003         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1004                 return -EINVAL;
1005
1006         /* if a STA is being removed, reuse its ID */
1007         flush_work(&mvm->sta_drained_wk);
1008
1009         mutex_lock(&mvm->mutex);
1010         if (old_state == IEEE80211_STA_NOTEXIST &&
1011             new_state == IEEE80211_STA_NONE) {
1012                 /*
1013                  * Firmware bug - it'll crash if the beacon interval is less
1014                  * than 16. We can't avoid connecting at all, so refuse the
1015                  * station state change, this will cause mac80211 to abandon
1016                  * attempts to connect to this AP, and eventually wpa_s will
1017                  * blacklist the AP...
1018                  */
1019                 if (vif->type == NL80211_IFTYPE_STATION &&
1020                     vif->bss_conf.beacon_int < 16) {
1021                         IWL_ERR(mvm,
1022                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1023                                 sta->addr, vif->bss_conf.beacon_int);
1024                         ret = -EINVAL;
1025                         goto out_unlock;
1026                 }
1027                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1028         } else if (old_state == IEEE80211_STA_NONE &&
1029                    new_state == IEEE80211_STA_AUTH) {
1030                 ret = 0;
1031         } else if (old_state == IEEE80211_STA_AUTH &&
1032                    new_state == IEEE80211_STA_ASSOC) {
1033                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1034                 if (ret == 0)
1035                         iwl_mvm_rs_rate_init(mvm, sta,
1036                                              mvmvif->phy_ctxt->channel->band);
1037         } else if (old_state == IEEE80211_STA_ASSOC &&
1038                    new_state == IEEE80211_STA_AUTHORIZED) {
1039                 ret = 0;
1040         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1041                    new_state == IEEE80211_STA_ASSOC) {
1042                 ret = 0;
1043         } else if (old_state == IEEE80211_STA_ASSOC &&
1044                    new_state == IEEE80211_STA_AUTH) {
1045                 ret = 0;
1046         } else if (old_state == IEEE80211_STA_AUTH &&
1047                    new_state == IEEE80211_STA_NONE) {
1048                 ret = 0;
1049         } else if (old_state == IEEE80211_STA_NONE &&
1050                    new_state == IEEE80211_STA_NOTEXIST) {
1051                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1052         } else {
1053                 ret = -EIO;
1054         }
1055  out_unlock:
1056         mutex_unlock(&mvm->mutex);
1057
1058         return ret;
1059 }
1060
1061 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1062 {
1063         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1064
1065         mvm->rts_threshold = value;
1066
1067         return 0;
1068 }
1069
1070 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1071                                struct ieee80211_vif *vif, u16 ac,
1072                                const struct ieee80211_tx_queue_params *params)
1073 {
1074         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1075         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1076
1077         mvmvif->queue_params[ac] = *params;
1078
1079         /*
1080          * No need to update right away, we'll get BSS_CHANGED_QOS
1081          * The exception is P2P_DEVICE interface which needs immediate update.
1082          */
1083         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1084                 int ret;
1085
1086                 mutex_lock(&mvm->mutex);
1087                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1088                 mutex_unlock(&mvm->mutex);
1089                 return ret;
1090         }
1091         return 0;
1092 }
1093
1094 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1095                                       struct ieee80211_vif *vif)
1096 {
1097         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1098         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1099                            200 + vif->bss_conf.beacon_int);
1100         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1101                                100 + vif->bss_conf.beacon_int);
1102
1103         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1104                 return;
1105
1106         mutex_lock(&mvm->mutex);
1107         /* Try really hard to protect the session and hear a beacon */
1108         iwl_mvm_protect_session(mvm, vif, duration, min_duration);
1109         mutex_unlock(&mvm->mutex);
1110 }
1111
1112 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1113                                enum set_key_cmd cmd,
1114                                struct ieee80211_vif *vif,
1115                                struct ieee80211_sta *sta,
1116                                struct ieee80211_key_conf *key)
1117 {
1118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1119         int ret;
1120
1121         if (iwlwifi_mod_params.sw_crypto) {
1122                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1123                 return -EOPNOTSUPP;
1124         }
1125
1126         switch (key->cipher) {
1127         case WLAN_CIPHER_SUITE_TKIP:
1128                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1129                 /* fall-through */
1130         case WLAN_CIPHER_SUITE_CCMP:
1131                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1132                 break;
1133         case WLAN_CIPHER_SUITE_AES_CMAC:
1134                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1135                 break;
1136         case WLAN_CIPHER_SUITE_WEP40:
1137         case WLAN_CIPHER_SUITE_WEP104:
1138                 /*
1139                  * Support for TX only, at least for now, so accept
1140                  * the key and do nothing else. Then mac80211 will
1141                  * pass it for TX but we don't have to use it for RX.
1142                  */
1143                 return 0;
1144         default:
1145                 return -EOPNOTSUPP;
1146         }
1147
1148         mutex_lock(&mvm->mutex);
1149
1150         switch (cmd) {
1151         case SET_KEY:
1152                 if (vif->type == NL80211_IFTYPE_AP && !sta) {
1153                         /* GTK on AP interface is a TX-only key, return 0 */
1154                         ret = 0;
1155                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1156                         break;
1157                 }
1158
1159                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1160                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1161                 if (ret) {
1162                         IWL_WARN(mvm, "set key failed\n");
1163                         /*
1164                          * can't add key for RX, but we don't need it
1165                          * in the device for TX so still return 0
1166                          */
1167                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1168                         ret = 0;
1169                 }
1170
1171                 break;
1172         case DISABLE_KEY:
1173                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1174                         ret = 0;
1175                         break;
1176                 }
1177
1178                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1179                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1180                 break;
1181         default:
1182                 ret = -EINVAL;
1183         }
1184
1185         mutex_unlock(&mvm->mutex);
1186         return ret;
1187 }
1188
1189 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1190                                         struct ieee80211_vif *vif,
1191                                         struct ieee80211_key_conf *keyconf,
1192                                         struct ieee80211_sta *sta,
1193                                         u32 iv32, u16 *phase1key)
1194 {
1195         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1196
1197         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
1198 }
1199
1200
1201 static int iwl_mvm_roc(struct ieee80211_hw *hw,
1202                        struct ieee80211_vif *vif,
1203                        struct ieee80211_channel *channel,
1204                        int duration,
1205                        enum ieee80211_roc_type type)
1206 {
1207         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1208         struct cfg80211_chan_def chandef;
1209         int ret;
1210
1211         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
1212                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
1213                 return -EINVAL;
1214         }
1215
1216         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
1217                            duration, type);
1218
1219         mutex_lock(&mvm->mutex);
1220
1221         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
1222         ret = iwl_mvm_phy_ctxt_changed(mvm, &mvm->phy_ctxt_roc,
1223                                        &chandef, 1, 1);
1224
1225         /* Schedule the time events */
1226         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
1227
1228         mutex_unlock(&mvm->mutex);
1229         IWL_DEBUG_MAC80211(mvm, "leave\n");
1230
1231         return ret;
1232 }
1233
1234 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
1235 {
1236         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1237
1238         IWL_DEBUG_MAC80211(mvm, "enter\n");
1239
1240         mutex_lock(&mvm->mutex);
1241         iwl_mvm_stop_p2p_roc(mvm);
1242         mutex_unlock(&mvm->mutex);
1243
1244         IWL_DEBUG_MAC80211(mvm, "leave\n");
1245         return 0;
1246 }
1247
1248 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
1249                                struct ieee80211_chanctx_conf *ctx)
1250 {
1251         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1252         struct iwl_mvm_phy_ctxt *phy_ctxt = (void *)ctx->drv_priv;
1253         int ret;
1254
1255         mutex_lock(&mvm->mutex);
1256
1257         IWL_DEBUG_MAC80211(mvm, "Add PHY context\n");
1258         ret = iwl_mvm_phy_ctxt_add(mvm, phy_ctxt, &ctx->def,
1259                                    ctx->rx_chains_static,
1260                                    ctx->rx_chains_dynamic);
1261         mutex_unlock(&mvm->mutex);
1262         return ret;
1263 }
1264
1265 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
1266                                    struct ieee80211_chanctx_conf *ctx)
1267 {
1268         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1269         struct iwl_mvm_phy_ctxt *phy_ctxt = (void *)ctx->drv_priv;
1270
1271         mutex_lock(&mvm->mutex);
1272         iwl_mvm_phy_ctxt_remove(mvm, phy_ctxt);
1273         mutex_unlock(&mvm->mutex);
1274 }
1275
1276 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
1277                                    struct ieee80211_chanctx_conf *ctx,
1278                                    u32 changed)
1279 {
1280         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1281         struct iwl_mvm_phy_ctxt *phy_ctxt = (void *)ctx->drv_priv;
1282
1283         mutex_lock(&mvm->mutex);
1284         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
1285                                  ctx->rx_chains_static,
1286                                  ctx->rx_chains_dynamic);
1287         mutex_unlock(&mvm->mutex);
1288 }
1289
1290 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
1291                                       struct ieee80211_vif *vif,
1292                                       struct ieee80211_chanctx_conf *ctx)
1293 {
1294         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1295         struct iwl_mvm_phy_ctxt *phyctx = (void *)ctx->drv_priv;
1296         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1297         int ret;
1298
1299         mutex_lock(&mvm->mutex);
1300
1301         mvmvif->phy_ctxt = phyctx;
1302
1303         switch (vif->type) {
1304         case NL80211_IFTYPE_AP:
1305                 /*
1306                  * The AP binding flow is handled as part of the start_ap flow
1307                  * (in bss_info_changed).
1308                  */
1309                 ret = 0;
1310                 goto out_unlock;
1311         case NL80211_IFTYPE_STATION:
1312         case NL80211_IFTYPE_ADHOC:
1313         case NL80211_IFTYPE_MONITOR:
1314                 break;
1315         default:
1316                 ret = -EINVAL;
1317                 goto out_unlock;
1318         }
1319
1320         ret = iwl_mvm_binding_add_vif(mvm, vif);
1321         if (ret)
1322                 goto out_unlock;
1323
1324         /*
1325          * Setting the quota at this stage is only required for monitor
1326          * interfaces. For the other types, the bss_info changed flow
1327          * will handle quota settings.
1328          */
1329         if (vif->type == NL80211_IFTYPE_MONITOR) {
1330                 mvmvif->monitor_active = true;
1331                 ret = iwl_mvm_update_quotas(mvm, vif);
1332                 if (ret)
1333                         goto out_remove_binding;
1334         }
1335
1336         goto out_unlock;
1337
1338  out_remove_binding:
1339         iwl_mvm_binding_remove_vif(mvm, vif);
1340  out_unlock:
1341         mutex_unlock(&mvm->mutex);
1342         if (ret)
1343                 mvmvif->phy_ctxt = NULL;
1344         return ret;
1345 }
1346
1347 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
1348                                          struct ieee80211_vif *vif,
1349                                          struct ieee80211_chanctx_conf *ctx)
1350 {
1351         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1352         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1353
1354         mutex_lock(&mvm->mutex);
1355
1356         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
1357
1358         if (vif->type == NL80211_IFTYPE_AP)
1359                 goto out_unlock;
1360
1361         switch (vif->type) {
1362         case NL80211_IFTYPE_MONITOR:
1363                 mvmvif->monitor_active = false;
1364                 iwl_mvm_update_quotas(mvm, NULL);
1365                 break;
1366         default:
1367                 break;
1368         }
1369
1370         iwl_mvm_binding_remove_vif(mvm, vif);
1371 out_unlock:
1372         mvmvif->phy_ctxt = NULL;
1373         mutex_unlock(&mvm->mutex);
1374 }
1375
1376 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
1377                            struct ieee80211_sta *sta,
1378                            bool set)
1379 {
1380         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1381         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1382
1383         if (!mvm_sta || !mvm_sta->vif) {
1384                 IWL_ERR(mvm, "Station is not associated to a vif\n");
1385                 return -EINVAL;
1386         }
1387
1388         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
1389 }
1390
1391 static void iwl_mvm_mac_rssi_callback(struct ieee80211_hw *hw,
1392                                       struct ieee80211_vif *vif,
1393                                       enum ieee80211_rssi_event rssi_event)
1394 {
1395         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1396
1397         iwl_mvm_bt_rssi_event(mvm, vif, rssi_event);
1398 }
1399
1400 struct ieee80211_ops iwl_mvm_hw_ops = {
1401         .tx = iwl_mvm_mac_tx,
1402         .ampdu_action = iwl_mvm_mac_ampdu_action,
1403         .start = iwl_mvm_mac_start,
1404         .restart_complete = iwl_mvm_mac_restart_complete,
1405         .stop = iwl_mvm_mac_stop,
1406         .add_interface = iwl_mvm_mac_add_interface,
1407         .remove_interface = iwl_mvm_mac_remove_interface,
1408         .config = iwl_mvm_mac_config,
1409         .configure_filter = iwl_mvm_configure_filter,
1410         .bss_info_changed = iwl_mvm_bss_info_changed,
1411         .hw_scan = iwl_mvm_mac_hw_scan,
1412         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
1413         .sta_state = iwl_mvm_mac_sta_state,
1414         .sta_notify = iwl_mvm_mac_sta_notify,
1415         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
1416         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
1417         .conf_tx = iwl_mvm_mac_conf_tx,
1418         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
1419         .set_key = iwl_mvm_mac_set_key,
1420         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
1421         .remain_on_channel = iwl_mvm_roc,
1422         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
1423         .rssi_callback = iwl_mvm_mac_rssi_callback,
1424
1425         .add_chanctx = iwl_mvm_add_chanctx,
1426         .remove_chanctx = iwl_mvm_remove_chanctx,
1427         .change_chanctx = iwl_mvm_change_chanctx,
1428         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
1429         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
1430
1431         .start_ap = iwl_mvm_start_ap,
1432         .stop_ap = iwl_mvm_stop_ap,
1433
1434         .set_tim = iwl_mvm_set_tim,
1435
1436 #ifdef CONFIG_PM_SLEEP
1437         /* look at d3.c */
1438         .suspend = iwl_mvm_suspend,
1439         .resume = iwl_mvm_resume,
1440         .set_wakeup = iwl_mvm_set_wakeup,
1441         .set_rekey_data = iwl_mvm_set_rekey_data,
1442 #if IS_ENABLED(CONFIG_IPV6)
1443         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
1444 #endif
1445         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
1446 #endif
1447 };