Pileus Git - ~andy/linux/blob - 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 - 2014 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
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  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 - 2014 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
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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 #include "testmode.h"
  81
  82 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  83         {
  84                 .max = 1,
  85                 .types = BIT(NL80211_IFTYPE_STATION),
  86         },
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_AP) |
  90                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  91                         BIT(NL80211_IFTYPE_P2P_GO),
  92         },
  93         {
  94                 .max = 1,
  95                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
  96         },
  97 };
  98
  99 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 100         {
 101                 .num_different_channels = 1,
 102                 .max_interfaces = 3,
 103                 .limits = iwl_mvm_limits,
 104                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 105         },
 106 };
 107
 108 #ifdef CONFIG_PM_SLEEP
 109 static const struct nl80211_wowlan_tcp_data_token_feature
 110 iwl_mvm_wowlan_tcp_token_feature = {
 111         .min_len = 0,
 112         .max_len = 255,
 113         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 114 };
 115
 116 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 117         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 118         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 119                             sizeof(struct ethhdr) -
 120                             sizeof(struct iphdr) -
 121                             sizeof(struct tcphdr),
 122         .data_interval_max = 65535, /* __le16 in API */
 123         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 124                             sizeof(struct ethhdr) -
 125                             sizeof(struct iphdr) -
 126                             sizeof(struct tcphdr),
 127         .seq = true,
 128 };
 129 #endif
 130
 131 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 132 {
 133         int i;
 134
 135         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 136         for (i = 0; i < NUM_PHY_CTX; i++) {
 137                 mvm->phy_ctxts[i].id = i;
 138                 mvm->phy_ctxts[i].ref = 0;
 139         }
 140 }
 141
 142 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 143 {
 144         /* we create the 802.11 header and SSID element */
 145         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 146                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 147         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 148 }
 149
 150 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 151 {
 152         struct ieee80211_hw *hw = mvm->hw;
 153         int num_mac, ret, i;
 154
 155         /* Tell mac80211 our characteristics */
 156         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 157                     IEEE80211_HW_SPECTRUM_MGMT |
 158                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 159                     IEEE80211_HW_QUEUE_CONTROL |
 160                     IEEE80211_HW_WANT_MONITOR_VIF |
 161                     IEEE80211_HW_SUPPORTS_PS |
 162                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 163                     IEEE80211_HW_AMPDU_AGGREGATION |
 164                     IEEE80211_HW_TIMING_BEACON_ONLY |
 165                     IEEE80211_HW_CONNECTION_MONITOR |
 166                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 167                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 168
 169         hw->queues = mvm->first_agg_queue;
 170         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 171         hw->rate_control_algorithm = "iwl-mvm-rs";
 172
 173         /*
 174          * Enable 11w if advertised by firmware and software crypto
 175          * is not enabled (as the firmware will interpret some mgmt
 176          * packets, so enabling it with software crypto isn't safe)
 177          */
 178         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 179             !iwlwifi_mod_params.sw_crypto)
 180                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 181
 182         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT) {
 183                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 184                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 185                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 186         }
 187
 188         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 189         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 190         hw->chanctx_data_size = sizeof(u16);
 191
 192         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 193                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 194                 BIT(NL80211_IFTYPE_AP) |
 195                 BIT(NL80211_IFTYPE_P2P_GO) |
 196                 BIT(NL80211_IFTYPE_P2P_DEVICE);
 197
 198         /* IBSS has bugs in older versions */
 199         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 8)
 200                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_ADHOC);
 201
 202         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 203         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 204                                        REGULATORY_DISABLE_BEACON_HINTS;
 205
 206         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 207         hw->wiphy->n_iface_combinations =
 208                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 209
 210         hw->wiphy->max_remain_on_channel_duration = 10000;
 211         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 212
 213         /* Extract MAC address */
 214         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 215         hw->wiphy->addresses = mvm->addresses;
 216         hw->wiphy->n_addresses = 1;
 217
 218         /* Extract additional MAC addresses if available */
 219         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 220                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 221
 222         for (i = 1; i < num_mac; i++) {
 223                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 224                        ETH_ALEN);
 225                 mvm->addresses[i].addr[5]++;
 226                 hw->wiphy->n_addresses++;
 227         }
 228
 229         iwl_mvm_reset_phy_ctxts(mvm);
 230
 231         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 232
 233         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 234
 235         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 236                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 237                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 238         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 239                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 240                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 241
 242         hw->wiphy->hw_version = mvm->trans->hw_id;
 243
 244         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 245                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 246         else
 247                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 248
 249         if (0 && mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SCHED_SCAN) {
 250                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 251                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 252                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 253                 /* we create the 802.11 header and zero length SSID IE. */
 254                 hw->wiphy->max_sched_scan_ie_len =
 255                                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 256         }
 257
 258         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 259                                NL80211_FEATURE_P2P_GO_OPPPS |
 260                                NL80211_FEATURE_LOW_PRIORITY_SCAN;
 261
 262         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 263
 264         /* currently FW API supports only one optional cipher scheme */
 265         if (mvm->fw->cs[0].cipher) {
 266                 mvm->hw->n_cipher_schemes = 1;
 267                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 268         }
 269
 270 #ifdef CONFIG_PM_SLEEP
 271         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 272             mvm->trans->ops->d3_suspend &&
 273             mvm->trans->ops->d3_resume &&
 274             device_can_wakeup(mvm->trans->dev)) {
 275                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 276                                     WIPHY_WOWLAN_DISCONNECT |
 277                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 278                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 279                 if (!iwlwifi_mod_params.sw_crypto)
 280                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 281                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 282                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 283
 284                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 285                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 286                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 287                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 288                 hw->wiphy->wowlan = &mvm->wowlan;
 289         }
 290 #endif
 291
 292         ret = iwl_mvm_leds_init(mvm);
 293         if (ret)
 294                 return ret;
 295
 296         ret = ieee80211_register_hw(mvm->hw);
 297         if (ret)
 298                 iwl_mvm_leds_exit(mvm);
 299
 300         return ret;
 301 }
 302
 303 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 304                            struct ieee80211_tx_control *control,
 305                            struct sk_buff *skb)
 306 {
 307         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 308
 309         if (iwl_mvm_is_radio_killed(mvm)) {
 310                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 311                 goto drop;
 312         }
 313
 314         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 315             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 316                 goto drop;
 317
 318         if (control->sta) {
 319                 if (iwl_mvm_tx_skb(mvm, skb, control->sta))
 320                         goto drop;
 321                 return;
 322         }
 323
 324         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 325                 goto drop;
 326         return;
 327  drop:
 328         ieee80211_free_txskb(hw, skb);
 329 }
 330
 331 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 332 {
 333         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 334                 return false;
 335         return true;
 336 }
 337
 338 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 339 {
 340         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 341                 return false;
 342         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 343                 return true;
 344
 345         /* enabled by default */
 346         return true;
 347 }
 348
 349 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 350                                     struct ieee80211_vif *vif,
 351                                     enum ieee80211_ampdu_mlme_action action,
 352                                     struct ieee80211_sta *sta, u16 tid,
 353                                     u16 *ssn, u8 buf_size)
 354 {
 355         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 356         int ret;
 357
 358         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 359                      sta->addr, tid, action);
 360
 361         if (!(mvm->nvm_data->sku_cap_11n_enable))
 362                 return -EACCES;
 363
 364         mutex_lock(&mvm->mutex);
 365
 366         switch (action) {
 367         case IEEE80211_AMPDU_RX_START:
 368                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 369                         ret = -EINVAL;
 370                         break;
 371                 }
 372                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 373                 break;
 374         case IEEE80211_AMPDU_RX_STOP:
 375                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 376                 break;
 377         case IEEE80211_AMPDU_TX_START:
 378                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 379                         ret = -EINVAL;
 380                         break;
 381                 }
 382                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 383                 break;
 384         case IEEE80211_AMPDU_TX_STOP_CONT:
 385                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 386                 break;
 387         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 388         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 389                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 390                 break;
 391         case IEEE80211_AMPDU_TX_OPERATIONAL:
 392                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 393                 break;
 394         default:
 395                 WARN_ON_ONCE(1);
 396                 ret = -EINVAL;
 397                 break;
 398         }
 399         mutex_unlock(&mvm->mutex);
 400
 401         return ret;
 402 }
 403
 404 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 405                                      struct ieee80211_vif *vif)
 406 {
 407         struct iwl_mvm *mvm = data;
 408         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 409
 410         mvmvif->uploaded = false;
 411         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 412
 413         /* does this make sense at all? */
 414         mvmvif->color++;
 415
 416         spin_lock_bh(&mvm->time_event_lock);
 417         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 418         spin_unlock_bh(&mvm->time_event_lock);
 419
 420         mvmvif->phy_ctxt = NULL;
 421 }
 422
 423 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 424 {
 425         iwl_trans_stop_device(mvm->trans);
 426
 427         mvm->scan_status = IWL_MVM_SCAN_NONE;
 428
 429         /* just in case one was running */
 430         ieee80211_remain_on_channel_expired(mvm->hw);
 431
 432         ieee80211_iterate_active_interfaces_atomic(
 433                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 434                 iwl_mvm_cleanup_iterator, mvm);
 435
 436         mvm->p2p_device_vif = NULL;
 437
 438         iwl_mvm_reset_phy_ctxts(mvm);
 439         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 440         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 441
 442         ieee80211_wake_queues(mvm->hw);
 443
 444         mvm->vif_count = 0;
 445         mvm->rx_ba_sessions = 0;
 446 }
 447
 448 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 449 {
 450         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 451         int ret;
 452
 453         mutex_lock(&mvm->mutex);
 454
 455         /* Clean up some internal and mac80211 state on restart */
 456         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 457                 iwl_mvm_restart_cleanup(mvm);
 458
 459         ret = iwl_mvm_up(mvm);
 460         mutex_unlock(&mvm->mutex);
 461
 462         return ret;
 463 }
 464
 465 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 466 {
 467         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 468         int ret;
 469
 470         mutex_lock(&mvm->mutex);
 471
 472         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 473         ret = iwl_mvm_update_quotas(mvm, NULL);
 474         if (ret)
 475                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 476                         ret);
 477
 478         mutex_unlock(&mvm->mutex);
 479 }
 480
 481 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 482 {
 483         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 484
 485         flush_work(&mvm->async_handlers_wk);
 486
 487         mutex_lock(&mvm->mutex);
 488         /* async_handlers_wk is now blocked */
 489
 490         /*
 491          * The work item could be running or queued if the
 492          * ROC time event stops just as we get here.
 493          */
 494         cancel_work_sync(&mvm->roc_done_wk);
 495
 496         iwl_trans_stop_device(mvm->trans);
 497
 498         iwl_mvm_async_handlers_purge(mvm);
 499         /* async_handlers_list is empty and will stay empty: HW is stopped */
 500
 501         /* the fw is stopped, the aux sta is dead: clean up driver state */
 502         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 503
 504         mutex_unlock(&mvm->mutex);
 505
 506         /*
 507          * The worker might have been waiting for the mutex, let it run and
 508          * discover that its list is now empty.
 509          */
 510         cancel_work_sync(&mvm->async_handlers_wk);
 511 }
 512
 513 static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
 514                                           struct ieee80211_vif *vif)
 515 {
 516         struct iwl_mvm *mvm = data;
 517
 518         iwl_mvm_power_update_mode(mvm, vif);
 519 }
 520
 521 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 522 {
 523         u16 i;
 524
 525         lockdep_assert_held(&mvm->mutex);
 526
 527         for (i = 0; i < NUM_PHY_CTX; i++)
 528                 if (!mvm->phy_ctxts[i].ref)
 529                         return &mvm->phy_ctxts[i];
 530
 531         IWL_ERR(mvm, "No available PHY context\n");
 532         return NULL;
 533 }
 534
 535 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 536                                 s8 tx_power)
 537 {
 538         /* FW is in charge of regulatory enforcement */
 539         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 540                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 541                 .pwr_restriction = cpu_to_le16(tx_power),
 542         };
 543
 544         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, CMD_SYNC,
 545                                     sizeof(reduce_txpwr_cmd),
 546                                     &reduce_txpwr_cmd);
 547 }
 548
 549 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 550                                      struct ieee80211_vif *vif)
 551 {
 552         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 553         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 554         int ret;
 555
 556         /*
 557          * Not much to do here. The stack will not allow interface
 558          * types or combinations that we didn't advertise, so we
 559          * don't really have to check the types.
 560          */
 561
 562         mutex_lock(&mvm->mutex);
 563
 564         /* Allocate resources for the MAC context, and add it to the fw  */
 565         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 566         if (ret)
 567                 goto out_unlock;
 568
 569         /* Counting number of interfaces is needed for legacy PM */
 570         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 571                 mvm->vif_count++;
 572
 573         /*
 574          * The AP binding flow can be done only after the beacon
 575          * template is configured (which happens only in the mac80211
 576          * start_ap() flow), and adding the broadcast station can happen
 577          * only after the binding.
 578          * In addition, since modifying the MAC before adding a bcast
 579          * station is not allowed by the FW, delay the adding of MAC context to
 580          * the point where we can also add the bcast station.
 581          * In short: there's not much we can do at this point, other than
 582          * allocating resources :)
 583          */
 584         if (vif->type == NL80211_IFTYPE_AP ||
 585             vif->type == NL80211_IFTYPE_ADHOC) {
 586                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 587                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 588                                                qmask);
 589                 if (ret) {
 590                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 591                         goto out_release;
 592                 }
 593
 594                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 595                 goto out_unlock;
 596         }
 597
 598         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 599         if (ret)
 600                 goto out_release;
 601
 602         iwl_mvm_power_disable(mvm, vif);
 603
 604         /* beacon filtering */
 605         ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 606         if (ret)
 607                 goto out_remove_mac;
 608
 609         if (!mvm->bf_allowed_vif &&
 610             vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 611             mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BF_UPDATED){
 612                 mvm->bf_allowed_vif = mvmvif;
 613                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 614                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 615         }
 616
 617         /*
 618          * P2P_DEVICE interface does not have a channel context assigned to it,
 619          * so a dedicated PHY context is allocated to it and the corresponding
 620          * MAC context is bound to it at this stage.
 621          */
 622         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 623
 624                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 625                 if (!mvmvif->phy_ctxt) {
 626                         ret = -ENOSPC;
 627                         goto out_free_bf;
 628                 }
 629
 630                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 631                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 632                 if (ret)
 633                         goto out_unref_phy;
 634
 635                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 636                 if (ret)
 637                         goto out_unbind;
 638
 639                 /* Save a pointer to p2p device vif, so it can later be used to
 640                  * update the p2p device MAC when a GO is started/stopped */
 641                 mvm->p2p_device_vif = vif;
 642         }
 643
 644         iwl_mvm_vif_dbgfs_register(mvm, vif);
 645         goto out_unlock;
 646
 647  out_unbind:
 648         iwl_mvm_binding_remove_vif(mvm, vif);
 649  out_unref_phy:
 650         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 651  out_free_bf:
 652         if (mvm->bf_allowed_vif == mvmvif) {
 653                 mvm->bf_allowed_vif = NULL;
 654                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 655                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 656         }
 657  out_remove_mac:
 658         mvmvif->phy_ctxt = NULL;
 659         iwl_mvm_mac_ctxt_remove(mvm, vif);
 660  out_release:
 661         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 662                 mvm->vif_count--;
 663
 664         /* TODO: remove this when legacy PM will be discarded */
 665         ieee80211_iterate_active_interfaces(
 666                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 667                 iwl_mvm_power_update_iterator, mvm);
 668
 669         iwl_mvm_mac_ctxt_release(mvm, vif);
 670  out_unlock:
 671         mutex_unlock(&mvm->mutex);
 672
 673         return ret;
 674 }
 675
 676 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 677                                         struct ieee80211_vif *vif)
 678 {
 679         u32 tfd_msk = 0, ac;
 680
 681         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 682                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 683                         tfd_msk |= BIT(vif->hw_queue[ac]);
 684
 685         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 686                 tfd_msk |= BIT(vif->cab_queue);
 687
 688         if (tfd_msk) {
 689                 mutex_lock(&mvm->mutex);
 690                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 691                 mutex_unlock(&mvm->mutex);
 692         }
 693
 694         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 695                 /*
 696                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 697                  * We assume here that all the packets sent to the OFFCHANNEL
 698                  * queue are sent in ROC session.
 699                  */
 700                 flush_work(&mvm->roc_done_wk);
 701         } else {
 702                 /*
 703                  * By now, all the AC queues are empty. The AGG queues are
 704                  * empty too. We already got all the Tx responses for all the
 705                  * packets in the queues. The drain work can have been
 706                  * triggered. Flush it.
 707                  */
 708                 flush_work(&mvm->sta_drained_wk);
 709         }
 710 }
 711
 712 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 713                                          struct ieee80211_vif *vif)
 714 {
 715         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 716         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 717
 718         iwl_mvm_prepare_mac_removal(mvm, vif);
 719
 720         mutex_lock(&mvm->mutex);
 721
 722         if (mvm->bf_allowed_vif == mvmvif) {
 723                 mvm->bf_allowed_vif = NULL;
 724                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 725                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 726         }
 727
 728         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 729
 730         /*
 731          * For AP/GO interface, the tear down of the resources allocated to the
 732          * interface is be handled as part of the stop_ap flow.
 733          */
 734         if (vif->type == NL80211_IFTYPE_AP ||
 735             vif->type == NL80211_IFTYPE_ADHOC) {
 736 #ifdef CONFIG_NL80211_TESTMODE
 737                 if (vif == mvm->noa_vif) {
 738                         mvm->noa_vif = NULL;
 739                         mvm->noa_duration = 0;
 740                 }
 741 #endif
 742                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 743                 goto out_release;
 744         }
 745
 746         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 747                 mvm->p2p_device_vif = NULL;
 748                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 749                 iwl_mvm_binding_remove_vif(mvm, vif);
 750                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 751                 mvmvif->phy_ctxt = NULL;
 752         }
 753
 754         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 755                 mvm->vif_count--;
 756
 757         /* TODO: remove this when legacy PM will be discarded */
 758         ieee80211_iterate_active_interfaces(
 759                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 760                 iwl_mvm_power_update_iterator, mvm);
 761
 762         iwl_mvm_mac_ctxt_remove(mvm, vif);
 763
 764 out_release:
 765         iwl_mvm_mac_ctxt_release(mvm, vif);
 766         mutex_unlock(&mvm->mutex);
 767 }
 768
 769 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 770 {
 771         return 0;
 772 }
 773
 774 struct iwl_mvm_mc_iter_data {
 775         struct iwl_mvm *mvm;
 776         int port_id;
 777 };
 778
 779 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
 780                                       struct ieee80211_vif *vif)
 781 {
 782         struct iwl_mvm_mc_iter_data *data = _data;
 783         struct iwl_mvm *mvm = data->mvm;
 784         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
 785         int ret, len;
 786
 787         /* if we don't have free ports, mcast frames will be dropped */
 788         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
 789                 return;
 790
 791         if (vif->type != NL80211_IFTYPE_STATION ||
 792             !vif->bss_conf.assoc)
 793                 return;
 794
 795         cmd->port_id = data->port_id++;
 796         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
 797         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
 798
 799         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC, len, cmd);
 800         if (ret)
 801                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
 802 }
 803
 804 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
 805 {
 806         struct iwl_mvm_mc_iter_data iter_data = {
 807                 .mvm = mvm,
 808         };
 809
 810         lockdep_assert_held(&mvm->mutex);
 811
 812         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
 813                 return;
 814
 815         ieee80211_iterate_active_interfaces(
 816                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 817                 iwl_mvm_mc_iface_iterator, &iter_data);
 818 }
 819
 820 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
 821                                      struct netdev_hw_addr_list *mc_list)
 822 {
 823         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 824         struct iwl_mcast_filter_cmd *cmd;
 825         struct netdev_hw_addr *addr;
 826         int addr_count = netdev_hw_addr_list_count(mc_list);
 827         bool pass_all = false;
 828         int len;
 829
 830         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
 831                 pass_all = true;
 832                 addr_count = 0;
 833         }
 834
 835         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
 836         cmd = kzalloc(len, GFP_ATOMIC);
 837         if (!cmd)
 838                 return 0;
 839
 840         if (pass_all) {
 841                 cmd->pass_all = 1;
 842                 return (u64)(unsigned long)cmd;
 843         }
 844
 845         netdev_hw_addr_list_for_each(addr, mc_list) {
 846                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
 847                                    cmd->count, addr->addr);
 848                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
 849                        addr->addr, ETH_ALEN);
 850                 cmd->count++;
 851         }
 852
 853         return (u64)(unsigned long)cmd;
 854 }
 855
 856 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
 857                                      unsigned int changed_flags,
 858                                      unsigned int *total_flags,
 859                                      u64 multicast)
 860 {
 861         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 862         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
 863
 864         mutex_lock(&mvm->mutex);
 865
 866         /* replace previous configuration */
 867         kfree(mvm->mcast_filter_cmd);
 868         mvm->mcast_filter_cmd = cmd;
 869
 870         if (!cmd)
 871                 goto out;
 872
 873         iwl_mvm_recalc_multicast(mvm);
 874 out:
 875         mutex_unlock(&mvm->mutex);
 876         *total_flags = 0;
 877 }
 878
 879 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 880                                              struct ieee80211_vif *vif,
 881                                              struct ieee80211_bss_conf *bss_conf,
 882                                              u32 changes)
 883 {
 884         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 885         int ret;
 886
 887         /*
 888          * Re-calculate the tsf id, as the master-slave relations depend on the
 889          * beacon interval, which was not known when the station interface was
 890          * added.
 891          */
 892         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
 893                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
 894
 895         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 896         if (ret)
 897                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
 898
 899         if (changes & BSS_CHANGED_ASSOC) {
 900                 if (bss_conf->assoc) {
 901                         /* add quota for this interface */
 902                         ret = iwl_mvm_update_quotas(mvm, vif);
 903                         if (ret) {
 904                                 IWL_ERR(mvm, "failed to update quotas\n");
 905                                 return;
 906                         }
 907
 908                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 909                                      &mvm->status)) {
 910                                 /*
 911                                  * If we're restarting then the firmware will
 912                                  * obviously have lost synchronisation with
 913                                  * the AP. It will attempt to synchronise by
 914                                  * itself, but we can make it more reliable by
 915                                  * scheduling a session protection time event.
 916                                  *
 917                                  * The firmware needs to receive a beacon to
 918                                  * catch up with synchronisation, use 110% of
 919                                  * the beacon interval.
 920                                  *
 921                                  * Set a large maximum delay to allow for more
 922                                  * than a single interface.
 923                                  */
 924                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
 925                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
 926                                                         5 * dur);
 927                         }
 928
 929                         iwl_mvm_sf_update(mvm, vif, false);
 930                         iwl_mvm_power_vif_assoc(mvm, vif);
 931                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
 932                         /*
 933                          * If update fails - SF might be running in associated
 934                          * mode while disassociated - which is forbidden.
 935                          */
 936                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
 937                                   "Failed to update SF upon disassociation\n");
 938
 939                         /* remove AP station now that the MAC is unassoc */
 940                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
 941                         if (ret)
 942                                 IWL_ERR(mvm, "failed to remove AP station\n");
 943                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 944                         /* remove quota for this interface */
 945                         ret = iwl_mvm_update_quotas(mvm, NULL);
 946                         if (ret)
 947                                 IWL_ERR(mvm, "failed to update quotas\n");
 948                 }
 949
 950                 iwl_mvm_recalc_multicast(mvm);
 951
 952                 /* reset rssi values */
 953                 mvmvif->bf_data.ave_beacon_signal = 0;
 954
 955                 if (!(mvm->fw->ucode_capa.flags &
 956                                         IWL_UCODE_TLV_FLAGS_PM_CMD_SUPPORT)) {
 957                         /* Workaround for FW bug, otherwise FW disables device
 958                          * power save upon disassociation
 959                          */
 960                         ret = iwl_mvm_power_update_mode(mvm, vif);
 961                         if (ret)
 962                                 IWL_ERR(mvm, "failed to update power mode\n");
 963                 }
 964                 iwl_mvm_bt_coex_vif_change(mvm);
 965                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
 966                                     IEEE80211_SMPS_AUTOMATIC);
 967         } else if (changes & BSS_CHANGED_BEACON_INFO) {
 968                 /*
 969                  * We received a beacon _after_ association so
 970                  * remove the session protection.
 971                  */
 972                 iwl_mvm_remove_time_event(mvm, mvmvif,
 973                                           &mvmvif->time_event_data);
 974         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
 975                               BSS_CHANGED_QOS)) {
 976                 ret = iwl_mvm_power_update_mode(mvm, vif);
 977                 if (ret)
 978                         IWL_ERR(mvm, "failed to update power mode\n");
 979         }
 980         if (changes & BSS_CHANGED_TXPOWER) {
 981                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
 982                                 bss_conf->txpower);
 983                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
 984         }
 985
 986         if (changes & BSS_CHANGED_CQM) {
 987                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed");
 988                 /* reset cqm events tracking */
 989                 mvmvif->bf_data.last_cqm_event = 0;
 990                 ret = iwl_mvm_update_beacon_filter(mvm, vif);
 991                 if (ret)
 992                         IWL_ERR(mvm, "failed to update CQM thresholds\n");
 993         }
 994 }
 995
 996 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
 997                                  struct ieee80211_vif *vif)
 998 {
 999         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1000         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1001         int ret;
1002
1003         mutex_lock(&mvm->mutex);
1004
1005         /* Send the beacon template */
1006         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1007         if (ret)
1008                 goto out_unlock;
1009
1010         /*
1011          * Re-calculate the tsf id, as the master-slave relations depend on the
1012          * beacon interval, which was not known when the AP interface was added.
1013          */
1014         if (vif->type == NL80211_IFTYPE_AP)
1015                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1016
1017         /* Add the mac context */
1018         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1019         if (ret)
1020                 goto out_unlock;
1021
1022         /* Perform the binding */
1023         ret = iwl_mvm_binding_add_vif(mvm, vif);
1024         if (ret)
1025                 goto out_remove;
1026
1027         mvmvif->ap_ibss_active = true;
1028
1029         /* Send the bcast station. At this stage the TBTT and DTIM time events
1030          * are added and applied to the scheduler */
1031         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1032         if (ret)
1033                 goto out_unbind;
1034
1035         /* must be set before quota calculations */
1036         mvmvif->ap_ibss_active = true;
1037
1038         /* power updated needs to be done before quotas */
1039         mvm->bound_vif_cnt++;
1040         iwl_mvm_power_update_binding(mvm, vif, true);
1041
1042         ret = iwl_mvm_update_quotas(mvm, vif);
1043         if (ret)
1044                 goto out_quota_failed;
1045
1046         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1047         if (vif->p2p && mvm->p2p_device_vif)
1048                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
1049
1050         iwl_mvm_bt_coex_vif_change(mvm);
1051
1052         mutex_unlock(&mvm->mutex);
1053         return 0;
1054
1055 out_quota_failed:
1056         mvm->bound_vif_cnt--;
1057         iwl_mvm_power_update_binding(mvm, vif, false);
1058         mvmvif->ap_ibss_active = false;
1059         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1060 out_unbind:
1061         iwl_mvm_binding_remove_vif(mvm, vif);
1062 out_remove:
1063         iwl_mvm_mac_ctxt_remove(mvm, vif);
1064 out_unlock:
1065         mutex_unlock(&mvm->mutex);
1066         return ret;
1067 }
1068
1069 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1070                                  struct ieee80211_vif *vif)
1071 {
1072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1073         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1074
1075         iwl_mvm_prepare_mac_removal(mvm, vif);
1076
1077         mutex_lock(&mvm->mutex);
1078
1079         mvmvif->ap_ibss_active = false;
1080
1081         iwl_mvm_bt_coex_vif_change(mvm);
1082
1083         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1084         if (vif->p2p && mvm->p2p_device_vif)
1085                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
1086
1087         iwl_mvm_update_quotas(mvm, NULL);
1088         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1089         iwl_mvm_binding_remove_vif(mvm, vif);
1090
1091         mvm->bound_vif_cnt--;
1092         iwl_mvm_power_update_binding(mvm, vif, false);
1093
1094         iwl_mvm_mac_ctxt_remove(mvm, vif);
1095
1096         mutex_unlock(&mvm->mutex);
1097 }
1098
1099 static void
1100 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1101                                  struct ieee80211_vif *vif,
1102                                  struct ieee80211_bss_conf *bss_conf,
1103                                  u32 changes)
1104 {
1105         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1106         enum ieee80211_bss_change ht_change = BSS_CHANGED_ERP_CTS_PROT |
1107                                               BSS_CHANGED_HT |
1108                                               BSS_CHANGED_BANDWIDTH;
1109         int ret;
1110
1111         /* Changes will be applied when the AP/IBSS is started */
1112         if (!mvmvif->ap_ibss_active)
1113                 return;
1114
1115         if (changes & ht_change) {
1116                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1117                 if (ret)
1118                         IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1119         }
1120
1121         /* Need to send a new beacon template to the FW */
1122         if (changes & BSS_CHANGED_BEACON) {
1123                 if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1124                         IWL_WARN(mvm, "Failed updating beacon data\n");
1125         }
1126 }
1127
1128 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1129                                      struct ieee80211_vif *vif,
1130                                      struct ieee80211_bss_conf *bss_conf,
1131                                      u32 changes)
1132 {
1133         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1134
1135         mutex_lock(&mvm->mutex);
1136
1137         switch (vif->type) {
1138         case NL80211_IFTYPE_STATION:
1139                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1140                 break;
1141         case NL80211_IFTYPE_AP:
1142         case NL80211_IFTYPE_ADHOC:
1143                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1144                 break;
1145         default:
1146                 /* shouldn't happen */
1147                 WARN_ON_ONCE(1);
1148         }
1149
1150         mutex_unlock(&mvm->mutex);
1151 }
1152
1153 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1154                                struct ieee80211_vif *vif,
1155                                struct cfg80211_scan_request *req)
1156 {
1157         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1158         int ret;
1159
1160         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
1161                 return -EINVAL;
1162
1163         mutex_lock(&mvm->mutex);
1164
1165         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1166                 ret = iwl_mvm_scan_request(mvm, vif, req);
1167         else
1168                 ret = -EBUSY;
1169
1170         mutex_unlock(&mvm->mutex);
1171
1172         return ret;
1173 }
1174
1175 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1176                                        struct ieee80211_vif *vif)
1177 {
1178         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1179
1180         mutex_lock(&mvm->mutex);
1181
1182         iwl_mvm_cancel_scan(mvm);
1183
1184         mutex_unlock(&mvm->mutex);
1185 }
1186
1187 static void
1188 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1189                                   struct ieee80211_sta *sta, u16 tid,
1190                                   int num_frames,
1191                                   enum ieee80211_frame_release_type reason,
1192                                   bool more_data)
1193 {
1194         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1195
1196         /* TODO: how do we tell the fw to send frames for a specific TID */
1197
1198         /*
1199          * The fw will send EOSP notification when the last frame will be
1200          * transmitted.
1201          */
1202         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
1203 }
1204
1205 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1206                                    struct ieee80211_vif *vif,
1207                                    enum sta_notify_cmd cmd,
1208                                    struct ieee80211_sta *sta)
1209 {
1210         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1211         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1212
1213         switch (cmd) {
1214         case STA_NOTIFY_SLEEP:
1215                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1216                         ieee80211_sta_block_awake(hw, sta, true);
1217                 /*
1218                  * The fw updates the STA to be asleep. Tx packets on the Tx
1219                  * queues to this station will not be transmitted. The fw will
1220                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1221                  */
1222                 break;
1223         case STA_NOTIFY_AWAKE:
1224                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1225                         break;
1226                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1227                 break;
1228         default:
1229                 break;
1230         }
1231 }
1232
1233 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1234                                        struct ieee80211_vif *vif,
1235                                        struct ieee80211_sta *sta)
1236 {
1237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1238         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1239
1240         /*
1241          * This is called before mac80211 does RCU synchronisation,
1242          * so here we already invalidate our internal RCU-protected
1243          * station pointer. The rest of the code will thus no longer
1244          * be able to find the station this way, and we don't rely
1245          * on further RCU synchronisation after the sta_state()
1246          * callback deleted the station.
1247          */
1248         mutex_lock(&mvm->mutex);
1249         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1250                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1251                                    ERR_PTR(-ENOENT));
1252         mutex_unlock(&mvm->mutex);
1253 }
1254
1255 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1256                                  struct ieee80211_vif *vif,
1257                                  struct ieee80211_sta *sta,
1258                                  enum ieee80211_sta_state old_state,
1259                                  enum ieee80211_sta_state new_state)
1260 {
1261         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1262         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1263         int ret;
1264
1265         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1266                            sta->addr, old_state, new_state);
1267
1268         /* this would be a mac80211 bug ... but don't crash */
1269         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1270                 return -EINVAL;
1271
1272         /* if a STA is being removed, reuse its ID */
1273         flush_work(&mvm->sta_drained_wk);
1274
1275         mutex_lock(&mvm->mutex);
1276         if (old_state == IEEE80211_STA_NOTEXIST &&
1277             new_state == IEEE80211_STA_NONE) {
1278                 /*
1279                  * Firmware bug - it'll crash if the beacon interval is less
1280                  * than 16. We can't avoid connecting at all, so refuse the
1281                  * station state change, this will cause mac80211 to abandon
1282                  * attempts to connect to this AP, and eventually wpa_s will
1283                  * blacklist the AP...
1284                  */
1285                 if (vif->type == NL80211_IFTYPE_STATION &&
1286                     vif->bss_conf.beacon_int < 16) {
1287                         IWL_ERR(mvm,
1288                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1289                                 sta->addr, vif->bss_conf.beacon_int);
1290                         ret = -EINVAL;
1291                         goto out_unlock;
1292                 }
1293                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1294         } else if (old_state == IEEE80211_STA_NONE &&
1295                    new_state == IEEE80211_STA_AUTH) {
1296                 ret = 0;
1297         } else if (old_state == IEEE80211_STA_AUTH &&
1298                    new_state == IEEE80211_STA_ASSOC) {
1299                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1300                 if (ret == 0)
1301                         iwl_mvm_rs_rate_init(mvm, sta,
1302                                              mvmvif->phy_ctxt->channel->band,
1303                                              true);
1304         } else if (old_state == IEEE80211_STA_ASSOC &&
1305                    new_state == IEEE80211_STA_AUTHORIZED) {
1306                 /* enable beacon filtering */
1307                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif));
1308                 ret = 0;
1309         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1310                    new_state == IEEE80211_STA_ASSOC) {
1311                 /* disable beacon filtering */
1312                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif));
1313                 ret = 0;
1314         } else if (old_state == IEEE80211_STA_ASSOC &&
1315                    new_state == IEEE80211_STA_AUTH) {
1316                 ret = 0;
1317         } else if (old_state == IEEE80211_STA_AUTH &&
1318                    new_state == IEEE80211_STA_NONE) {
1319                 ret = 0;
1320         } else if (old_state == IEEE80211_STA_NONE &&
1321                    new_state == IEEE80211_STA_NOTEXIST) {
1322                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1323         } else {
1324                 ret = -EIO;
1325         }
1326  out_unlock:
1327         mutex_unlock(&mvm->mutex);
1328
1329         return ret;
1330 }
1331
1332 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1333 {
1334         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1335
1336         mvm->rts_threshold = value;
1337
1338         return 0;
1339 }
1340
1341 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1342                                   struct ieee80211_vif *vif,
1343                                   struct ieee80211_sta *sta, u32 changed)
1344 {
1345         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1346
1347         if (vif->type == NL80211_IFTYPE_STATION &&
1348             changed & IEEE80211_RC_NSS_CHANGED)
1349                 iwl_mvm_sf_update(mvm, vif, false);
1350 }
1351
1352 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1353                                struct ieee80211_vif *vif, u16 ac,
1354                                const struct ieee80211_tx_queue_params *params)
1355 {
1356         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1357         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1358
1359         mvmvif->queue_params[ac] = *params;
1360
1361         /*
1362          * No need to update right away, we'll get BSS_CHANGED_QOS
1363          * The exception is P2P_DEVICE interface which needs immediate update.
1364          */
1365         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1366                 int ret;
1367
1368                 mutex_lock(&mvm->mutex);
1369                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1370                 mutex_unlock(&mvm->mutex);
1371                 return ret;
1372         }
1373         return 0;
1374 }
1375
1376 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1377                                       struct ieee80211_vif *vif)
1378 {
1379         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1380         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1381                            200 + vif->bss_conf.beacon_int);
1382         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1383                                100 + vif->bss_conf.beacon_int);
1384
1385         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1386                 return;
1387
1388         mutex_lock(&mvm->mutex);
1389         /* Try really hard to protect the session and hear a beacon */
1390         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1391         mutex_unlock(&mvm->mutex);
1392 }
1393
1394 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1395                                         struct ieee80211_vif *vif,
1396                                         struct cfg80211_sched_scan_request *req,
1397                                         struct ieee80211_sched_scan_ies *ies)
1398 {
1399         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1400         int ret;
1401
1402         mutex_lock(&mvm->mutex);
1403
1404         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1405                 IWL_DEBUG_SCAN(mvm,
1406                                "SCHED SCAN request during internal scan - abort\n");
1407                 ret = -EBUSY;
1408                 goto out;
1409         }
1410
1411         mvm->scan_status = IWL_MVM_SCAN_SCHED;
1412
1413         ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1414         if (ret)
1415                 goto err;
1416
1417         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1418         if (ret)
1419                 goto err;
1420
1421         ret = iwl_mvm_sched_scan_start(mvm, req);
1422         if (!ret)
1423                 goto out;
1424 err:
1425         mvm->scan_status = IWL_MVM_SCAN_NONE;
1426 out:
1427         mutex_unlock(&mvm->mutex);
1428         return ret;
1429 }
1430
1431 static void iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
1432                                         struct ieee80211_vif *vif)
1433 {
1434         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1435
1436         mutex_lock(&mvm->mutex);
1437         iwl_mvm_sched_scan_stop(mvm);
1438         mutex_unlock(&mvm->mutex);
1439 }
1440
1441 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1442                                enum set_key_cmd cmd,
1443                                struct ieee80211_vif *vif,
1444                                struct ieee80211_sta *sta,
1445                                struct ieee80211_key_conf *key)
1446 {
1447         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1448         int ret;
1449
1450         if (iwlwifi_mod_params.sw_crypto) {
1451                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1452                 return -EOPNOTSUPP;
1453         }
1454
1455         switch (key->cipher) {
1456         case WLAN_CIPHER_SUITE_TKIP:
1457                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1458                 /* fall-through */
1459         case WLAN_CIPHER_SUITE_CCMP:
1460                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1461                 break;
1462         case WLAN_CIPHER_SUITE_AES_CMAC:
1463                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1464                 break;
1465         case WLAN_CIPHER_SUITE_WEP40:
1466         case WLAN_CIPHER_SUITE_WEP104:
1467                 /*
1468                  * Support for TX only, at least for now, so accept
1469                  * the key and do nothing else. Then mac80211 will
1470                  * pass it for TX but we don't have to use it for RX.
1471                  */
1472                 return 0;
1473         default:
1474                 /* currently FW supports only one optional cipher scheme */
1475                 if (hw->n_cipher_schemes &&
1476                     hw->cipher_schemes->cipher == key->cipher)
1477                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
1478                 else
1479                         return -EOPNOTSUPP;
1480         }
1481
1482         mutex_lock(&mvm->mutex);
1483
1484         switch (cmd) {
1485         case SET_KEY:
1486                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1487                      vif->type == NL80211_IFTYPE_AP) && !sta) {
1488                         /*
1489                          * GTK on AP interface is a TX-only key, return 0;
1490                          * on IBSS they're per-station and because we're lazy
1491                          * we don't support them for RX, so do the same.
1492                          */
1493                         ret = 0;
1494                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1495                         break;
1496                 }
1497
1498                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1499                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1500                 if (ret) {
1501                         IWL_WARN(mvm, "set key failed\n");
1502                         /*
1503                          * can't add key for RX, but we don't need it
1504                          * in the device for TX so still return 0
1505                          */
1506                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1507                         ret = 0;
1508                 }
1509
1510                 break;
1511         case DISABLE_KEY:
1512                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1513                         ret = 0;
1514                         break;
1515                 }
1516
1517                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1518                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1519                 break;
1520         default:
1521                 ret = -EINVAL;
1522         }
1523
1524         mutex_unlock(&mvm->mutex);
1525         return ret;
1526 }
1527
1528 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1529                                         struct ieee80211_vif *vif,
1530                                         struct ieee80211_key_conf *keyconf,
1531                                         struct ieee80211_sta *sta,
1532                                         u32 iv32, u16 *phase1key)
1533 {
1534         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1535
1536         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1537                 return;
1538
1539         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
1540 }
1541
1542
1543 static int iwl_mvm_roc(struct ieee80211_hw *hw,
1544                        struct ieee80211_vif *vif,
1545                        struct ieee80211_channel *channel,
1546                        int duration,
1547                        enum ieee80211_roc_type type)
1548 {
1549         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1550         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1551         struct cfg80211_chan_def chandef;
1552         struct iwl_mvm_phy_ctxt *phy_ctxt;
1553         int ret, i;
1554
1555         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
1556                            duration, type);
1557
1558         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
1559                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
1560                 return -EINVAL;
1561         }
1562
1563         mutex_lock(&mvm->mutex);
1564
1565         for (i = 0; i < NUM_PHY_CTX; i++) {
1566                 phy_ctxt = &mvm->phy_ctxts[i];
1567                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
1568                         continue;
1569
1570                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
1571                         /*
1572                          * Unbind the P2P_DEVICE from the current PHY context,
1573                          * and if the PHY context is not used remove it.
1574                          */
1575                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
1576                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1577                                 goto out_unlock;
1578
1579                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1580
1581                         /* Bind the P2P_DEVICE to the current PHY Context */
1582                         mvmvif->phy_ctxt = phy_ctxt;
1583
1584                         ret = iwl_mvm_binding_add_vif(mvm, vif);
1585                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1586                                 goto out_unlock;
1587
1588                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1589                         goto schedule_time_event;
1590                 }
1591         }
1592
1593         /* Need to update the PHY context only if the ROC channel changed */
1594         if (channel == mvmvif->phy_ctxt->channel)
1595                 goto schedule_time_event;
1596
1597         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
1598
1599         /*
1600          * Change the PHY context configuration as it is currently referenced
1601          * only by the P2P Device MAC
1602          */
1603         if (mvmvif->phy_ctxt->ref == 1) {
1604                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
1605                                                &chandef, 1, 1);
1606                 if (ret)
1607                         goto out_unlock;
1608         } else {
1609                 /*
1610                  * The PHY context is shared with other MACs. Need to remove the
1611                  * P2P Device from the binding, allocate an new PHY context and
1612                  * create a new binding
1613                  */
1614                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1615                 if (!phy_ctxt) {
1616                         ret = -ENOSPC;
1617                         goto out_unlock;
1618                 }
1619
1620                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
1621                                                1, 1);
1622                 if (ret) {
1623                         IWL_ERR(mvm, "Failed to change PHY context\n");
1624                         goto out_unlock;
1625                 }
1626
1627                 /* Unbind the P2P_DEVICE from the current PHY context */
1628                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
1629                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1630                         goto out_unlock;
1631
1632                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1633
1634                 /* Bind the P2P_DEVICE to the new allocated PHY context */
1635                 mvmvif->phy_ctxt = phy_ctxt;
1636
1637                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1638                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1639                         goto out_unlock;
1640
1641                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1642         }
1643
1644 schedule_time_event:
1645         /* Schedule the time events */
1646         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
1647
1648 out_unlock:
1649         mutex_unlock(&mvm->mutex);
1650         IWL_DEBUG_MAC80211(mvm, "leave\n");
1651         return ret;
1652 }
1653
1654 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
1655 {
1656         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1657
1658         IWL_DEBUG_MAC80211(mvm, "enter\n");
1659
1660         mutex_lock(&mvm->mutex);
1661         iwl_mvm_stop_p2p_roc(mvm);
1662         mutex_unlock(&mvm->mutex);
1663
1664         IWL_DEBUG_MAC80211(mvm, "leave\n");
1665         return 0;
1666 }
1667
1668 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
1669                                struct ieee80211_chanctx_conf *ctx)
1670 {
1671         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1672         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1673         struct iwl_mvm_phy_ctxt *phy_ctxt;
1674         int ret;
1675
1676         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
1677
1678         mutex_lock(&mvm->mutex);
1679         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1680         if (!phy_ctxt) {
1681                 ret = -ENOSPC;
1682                 goto out;
1683         }
1684
1685         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
1686                                        ctx->rx_chains_static,
1687                                        ctx->rx_chains_dynamic);
1688         if (ret) {
1689                 IWL_ERR(mvm, "Failed to add PHY context\n");
1690                 goto out;
1691         }
1692
1693         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
1694         *phy_ctxt_id = phy_ctxt->id;
1695 out:
1696         mutex_unlock(&mvm->mutex);
1697         return ret;
1698 }
1699
1700 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
1701                                    struct ieee80211_chanctx_conf *ctx)
1702 {
1703         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1704         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1705         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1706
1707         mutex_lock(&mvm->mutex);
1708         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
1709         mutex_unlock(&mvm->mutex);
1710 }
1711
1712 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
1713                                    struct ieee80211_chanctx_conf *ctx,
1714                                    u32 changed)
1715 {
1716         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1717         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1718         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1719
1720         if (WARN_ONCE((phy_ctxt->ref > 1) &&
1721                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
1722                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
1723                                    IEEE80211_CHANCTX_CHANGE_RADAR |
1724                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
1725                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
1726                       phy_ctxt->ref, changed))
1727                 return;
1728
1729         mutex_lock(&mvm->mutex);
1730         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
1731                                  ctx->rx_chains_static,
1732                                  ctx->rx_chains_dynamic);
1733         iwl_mvm_bt_coex_vif_change(mvm);
1734         mutex_unlock(&mvm->mutex);
1735 }
1736
1737 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
1738                                       struct ieee80211_vif *vif,
1739                                       struct ieee80211_chanctx_conf *ctx)
1740 {
1741         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1742         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1743         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1744         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1745         int ret;
1746
1747         mutex_lock(&mvm->mutex);
1748
1749         mvmvif->phy_ctxt = phy_ctxt;
1750
1751         switch (vif->type) {
1752         case NL80211_IFTYPE_AP:
1753         case NL80211_IFTYPE_ADHOC:
1754                 /*
1755                  * The AP binding flow is handled as part of the start_ap flow
1756                  * (in bss_info_changed), similarly for IBSS.
1757                  */
1758                 ret = 0;
1759                 goto out_unlock;
1760         case NL80211_IFTYPE_STATION:
1761         case NL80211_IFTYPE_MONITOR:
1762                 break;
1763         default:
1764                 ret = -EINVAL;
1765                 goto out_unlock;
1766         }
1767
1768         ret = iwl_mvm_binding_add_vif(mvm, vif);
1769         if (ret)
1770                 goto out_unlock;
1771
1772         /*
1773          * Power state must be updated before quotas,
1774          * otherwise fw will complain.
1775          */
1776         mvm->bound_vif_cnt++;
1777         iwl_mvm_power_update_binding(mvm, vif, true);
1778
1779         /* Setting the quota at this stage is only required for monitor
1780          * interfaces. For the other types, the bss_info changed flow
1781          * will handle quota settings.
1782          */
1783         if (vif->type == NL80211_IFTYPE_MONITOR) {
1784                 mvmvif->monitor_active = true;
1785                 ret = iwl_mvm_update_quotas(mvm, vif);
1786                 if (ret)
1787                         goto out_remove_binding;
1788         }
1789
1790         goto out_unlock;
1791
1792  out_remove_binding:
1793         iwl_mvm_binding_remove_vif(mvm, vif);
1794         mvm->bound_vif_cnt--;
1795         iwl_mvm_power_update_binding(mvm, vif, false);
1796  out_unlock:
1797         mutex_unlock(&mvm->mutex);
1798         if (ret)
1799                 mvmvif->phy_ctxt = NULL;
1800         return ret;
1801 }
1802
1803 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
1804                                          struct ieee80211_vif *vif,
1805                                          struct ieee80211_chanctx_conf *ctx)
1806 {
1807         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1808         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1809
1810         mutex_lock(&mvm->mutex);
1811
1812         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
1813
1814         switch (vif->type) {
1815         case NL80211_IFTYPE_AP:
1816         case NL80211_IFTYPE_ADHOC:
1817                 goto out_unlock;
1818         case NL80211_IFTYPE_MONITOR:
1819                 mvmvif->monitor_active = false;
1820                 iwl_mvm_update_quotas(mvm, NULL);
1821                 break;
1822         default:
1823                 break;
1824         }
1825
1826         iwl_mvm_binding_remove_vif(mvm, vif);
1827         mvm->bound_vif_cnt--;
1828         iwl_mvm_power_update_binding(mvm, vif, false);
1829
1830 out_unlock:
1831         mvmvif->phy_ctxt = NULL;
1832         mutex_unlock(&mvm->mutex);
1833 }
1834
1835 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
1836                            struct ieee80211_sta *sta,
1837                            bool set)
1838 {
1839         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1840         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1841
1842         if (!mvm_sta || !mvm_sta->vif) {
1843                 IWL_ERR(mvm, "Station is not associated to a vif\n");
1844                 return -EINVAL;
1845         }
1846
1847         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
1848 }
1849
1850 #ifdef CONFIG_NL80211_TESTMODE
1851 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
1852         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
1853         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
1854         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
1855 };
1856
1857 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
1858                                       struct ieee80211_vif *vif,
1859                                       void *data, int len)
1860 {
1861         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
1862         int err;
1863         u32 noa_duration;
1864
1865         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
1866         if (err)
1867                 return err;
1868
1869         if (!tb[IWL_MVM_TM_ATTR_CMD])
1870                 return -EINVAL;
1871
1872         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
1873         case IWL_MVM_TM_CMD_SET_NOA:
1874                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
1875                     !vif->bss_conf.enable_beacon ||
1876                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
1877                         return -EINVAL;
1878
1879                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
1880                 if (noa_duration >= vif->bss_conf.beacon_int)
1881                         return -EINVAL;
1882
1883                 mvm->noa_duration = noa_duration;
1884                 mvm->noa_vif = vif;
1885
1886                 return iwl_mvm_update_quotas(mvm, NULL);
1887         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
1888                 /* must be associated client vif - ignore authorized */
1889                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
1890                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
1891                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
1892                         return -EINVAL;
1893
1894                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
1895                         return iwl_mvm_enable_beacon_filter(mvm, vif);
1896                 return iwl_mvm_disable_beacon_filter(mvm, vif);
1897         }
1898
1899         return -EOPNOTSUPP;
1900 }
1901
1902 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
1903                                     struct ieee80211_vif *vif,
1904                                     void *data, int len)
1905 {
1906         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1907         int err;
1908
1909         mutex_lock(&mvm->mutex);
1910         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
1911         mutex_unlock(&mvm->mutex);
1912
1913         return err;
1914 }
1915 #endif
1916
1917 struct ieee80211_ops iwl_mvm_hw_ops = {
1918         .tx = iwl_mvm_mac_tx,
1919         .ampdu_action = iwl_mvm_mac_ampdu_action,
1920         .start = iwl_mvm_mac_start,
1921         .restart_complete = iwl_mvm_mac_restart_complete,
1922         .stop = iwl_mvm_mac_stop,
1923         .add_interface = iwl_mvm_mac_add_interface,
1924         .remove_interface = iwl_mvm_mac_remove_interface,
1925         .config = iwl_mvm_mac_config,
1926         .prepare_multicast = iwl_mvm_prepare_multicast,
1927         .configure_filter = iwl_mvm_configure_filter,
1928         .bss_info_changed = iwl_mvm_bss_info_changed,
1929         .hw_scan = iwl_mvm_mac_hw_scan,
1930         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
1931         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
1932         .sta_state = iwl_mvm_mac_sta_state,
1933         .sta_notify = iwl_mvm_mac_sta_notify,
1934         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
1935         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
1936         .sta_rc_update = iwl_mvm_sta_rc_update,
1937         .conf_tx = iwl_mvm_mac_conf_tx,
1938         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
1939         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
1940         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
1941         .set_key = iwl_mvm_mac_set_key,
1942         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
1943         .remain_on_channel = iwl_mvm_roc,
1944         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
1945         .add_chanctx = iwl_mvm_add_chanctx,
1946         .remove_chanctx = iwl_mvm_remove_chanctx,
1947         .change_chanctx = iwl_mvm_change_chanctx,
1948         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
1949         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
1950
1951         .start_ap = iwl_mvm_start_ap_ibss,
1952         .stop_ap = iwl_mvm_stop_ap_ibss,
1953         .join_ibss = iwl_mvm_start_ap_ibss,
1954         .leave_ibss = iwl_mvm_stop_ap_ibss,
1955
1956         .set_tim = iwl_mvm_set_tim,
1957
1958         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
1959
1960 #ifdef CONFIG_PM_SLEEP
1961         /* look at d3.c */
1962         .suspend = iwl_mvm_suspend,
1963         .resume = iwl_mvm_resume,
1964         .set_wakeup = iwl_mvm_set_wakeup,
1965         .set_rekey_data = iwl_mvm_set_rekey_data,
1966 #if IS_ENABLED(CONFIG_IPV6)
1967         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
1968 #endif
1969         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
1970 #endif
1971 };