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
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
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  40  *  * Redistributions of source code must retain the above copyright
  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 (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 && mvm->fw->cs->cipher) {
 266                 mvm->hw->n_cipher_schemes = 1;
 267                 mvm->hw->cipher_schemes = mvm->fw->cs;
 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 int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 332                                     struct ieee80211_vif *vif,
 333                                     enum ieee80211_ampdu_mlme_action action,
 334                                     struct ieee80211_sta *sta, u16 tid,
 335                                     u16 *ssn, u8 buf_size)
 336 {
 337         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 338         int ret;
 339
 340         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 341                      sta->addr, tid, action);
 342
 343         if (!(mvm->nvm_data->sku_cap_11n_enable))
 344                 return -EACCES;
 345
 346         mutex_lock(&mvm->mutex);
 347
 348         switch (action) {
 349         case IEEE80211_AMPDU_RX_START:
 350                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) {
 351                         ret = -EINVAL;
 352                         break;
 353                 }
 354                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 355                 break;
 356         case IEEE80211_AMPDU_RX_STOP:
 357                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 358                 break;
 359         case IEEE80211_AMPDU_TX_START:
 360                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) {
 361                         ret = -EINVAL;
 362                         break;
 363                 }
 364                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 365                 break;
 366         case IEEE80211_AMPDU_TX_STOP_CONT:
 367                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 368                 break;
 369         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 370         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 371                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 372                 break;
 373         case IEEE80211_AMPDU_TX_OPERATIONAL:
 374                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 375                 break;
 376         default:
 377                 WARN_ON_ONCE(1);
 378                 ret = -EINVAL;
 379                 break;
 380         }
 381         mutex_unlock(&mvm->mutex);
 382
 383         return ret;
 384 }
 385
 386 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 387                                      struct ieee80211_vif *vif)
 388 {
 389         struct iwl_mvm *mvm = data;
 390         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 391
 392         mvmvif->uploaded = false;
 393         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 394
 395         /* does this make sense at all? */
 396         mvmvif->color++;
 397
 398         spin_lock_bh(&mvm->time_event_lock);
 399         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 400         spin_unlock_bh(&mvm->time_event_lock);
 401
 402         mvmvif->phy_ctxt = NULL;
 403 }
 404
 405 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 406 {
 407         iwl_trans_stop_device(mvm->trans);
 408
 409         mvm->scan_status = IWL_MVM_SCAN_NONE;
 410
 411         /* just in case one was running */
 412         ieee80211_remain_on_channel_expired(mvm->hw);
 413
 414         ieee80211_iterate_active_interfaces_atomic(
 415                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 416                 iwl_mvm_cleanup_iterator, mvm);
 417
 418         mvm->p2p_device_vif = NULL;
 419
 420         iwl_mvm_reset_phy_ctxts(mvm);
 421         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 422         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 423
 424         ieee80211_wake_queues(mvm->hw);
 425
 426         mvm->vif_count = 0;
 427         mvm->rx_ba_sessions = 0;
 428 }
 429
 430 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 431 {
 432         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 433         int ret;
 434
 435         mutex_lock(&mvm->mutex);
 436
 437         /* Clean up some internal and mac80211 state on restart */
 438         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 439                 iwl_mvm_restart_cleanup(mvm);
 440
 441         ret = iwl_mvm_up(mvm);
 442         mutex_unlock(&mvm->mutex);
 443
 444         return ret;
 445 }
 446
 447 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 448 {
 449         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 450         int ret;
 451
 452         mutex_lock(&mvm->mutex);
 453
 454         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 455         ret = iwl_mvm_update_quotas(mvm, NULL);
 456         if (ret)
 457                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 458                         ret);
 459
 460         mutex_unlock(&mvm->mutex);
 461 }
 462
 463 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 464 {
 465         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 466
 467         flush_work(&mvm->async_handlers_wk);
 468
 469         mutex_lock(&mvm->mutex);
 470         /* async_handlers_wk is now blocked */
 471
 472         /*
 473          * The work item could be running or queued if the
 474          * ROC time event stops just as we get here.
 475          */
 476         cancel_work_sync(&mvm->roc_done_wk);
 477
 478         iwl_trans_stop_device(mvm->trans);
 479
 480         iwl_mvm_async_handlers_purge(mvm);
 481         /* async_handlers_list is empty and will stay empty: HW is stopped */
 482
 483         /* the fw is stopped, the aux sta is dead: clean up driver state */
 484         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 485
 486         mutex_unlock(&mvm->mutex);
 487
 488         /*
 489          * The worker might have been waiting for the mutex, let it run and
 490          * discover that its list is now empty.
 491          */
 492         cancel_work_sync(&mvm->async_handlers_wk);
 493 }
 494
 495 static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
 496                                           struct ieee80211_vif *vif)
 497 {
 498         struct iwl_mvm *mvm = data;
 499
 500         iwl_mvm_power_update_mode(mvm, vif);
 501 }
 502
 503 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 504 {
 505         u16 i;
 506
 507         lockdep_assert_held(&mvm->mutex);
 508
 509         for (i = 0; i < NUM_PHY_CTX; i++)
 510                 if (!mvm->phy_ctxts[i].ref)
 511                         return &mvm->phy_ctxts[i];
 512
 513         IWL_ERR(mvm, "No available PHY context\n");
 514         return NULL;
 515 }
 516
 517 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 518                                 s8 tx_power)
 519 {
 520         /* FW is in charge of regulatory enforcement */
 521         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 522                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 523                 .pwr_restriction = cpu_to_le16(tx_power),
 524         };
 525
 526         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, CMD_SYNC,
 527                                     sizeof(reduce_txpwr_cmd),
 528                                     &reduce_txpwr_cmd);
 529 }
 530
 531 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 532                                      struct ieee80211_vif *vif)
 533 {
 534         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 535         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 536         int ret;
 537
 538         /*
 539          * Not much to do here. The stack will not allow interface
 540          * types or combinations that we didn't advertise, so we
 541          * don't really have to check the types.
 542          */
 543
 544         mutex_lock(&mvm->mutex);
 545
 546         /* Allocate resources for the MAC context, and add it to the fw  */
 547         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 548         if (ret)
 549                 goto out_unlock;
 550
 551         /* Counting number of interfaces is needed for legacy PM */
 552         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 553                 mvm->vif_count++;
 554
 555         /*
 556          * The AP binding flow can be done only after the beacon
 557          * template is configured (which happens only in the mac80211
 558          * start_ap() flow), and adding the broadcast station can happen
 559          * only after the binding.
 560          * In addition, since modifying the MAC before adding a bcast
 561          * station is not allowed by the FW, delay the adding of MAC context to
 562          * the point where we can also add the bcast station.
 563          * In short: there's not much we can do at this point, other than
 564          * allocating resources :)
 565          */
 566         if (vif->type == NL80211_IFTYPE_AP ||
 567             vif->type == NL80211_IFTYPE_ADHOC) {
 568                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 569                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 570                                                qmask);
 571                 if (ret) {
 572                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 573                         goto out_release;
 574                 }
 575
 576                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 577                 goto out_unlock;
 578         }
 579
 580         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 581         if (ret)
 582                 goto out_release;
 583
 584         iwl_mvm_power_disable(mvm, vif);
 585
 586         /* beacon filtering */
 587         ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 588         if (ret)
 589                 goto out_remove_mac;
 590
 591         if (!mvm->bf_allowed_vif &&
 592             vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 593             mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BF_UPDATED){
 594                 mvm->bf_allowed_vif = mvmvif;
 595                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 596                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 597         }
 598
 599         /*
 600          * P2P_DEVICE interface does not have a channel context assigned to it,
 601          * so a dedicated PHY context is allocated to it and the corresponding
 602          * MAC context is bound to it at this stage.
 603          */
 604         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 605
 606                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 607                 if (!mvmvif->phy_ctxt) {
 608                         ret = -ENOSPC;
 609                         goto out_free_bf;
 610                 }
 611
 612                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 613                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 614                 if (ret)
 615                         goto out_unref_phy;
 616
 617                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 618                 if (ret)
 619                         goto out_unbind;
 620
 621                 /* Save a pointer to p2p device vif, so it can later be used to
 622                  * update the p2p device MAC when a GO is started/stopped */
 623                 mvm->p2p_device_vif = vif;
 624         }
 625
 626         iwl_mvm_vif_dbgfs_register(mvm, vif);
 627         goto out_unlock;
 628
 629  out_unbind:
 630         iwl_mvm_binding_remove_vif(mvm, vif);
 631  out_unref_phy:
 632         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 633  out_free_bf:
 634         if (mvm->bf_allowed_vif == mvmvif) {
 635                 mvm->bf_allowed_vif = NULL;
 636                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 637                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 638         }
 639  out_remove_mac:
 640         mvmvif->phy_ctxt = NULL;
 641         iwl_mvm_mac_ctxt_remove(mvm, vif);
 642  out_release:
 643         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 644                 mvm->vif_count--;
 645
 646         /* TODO: remove this when legacy PM will be discarded */
 647         ieee80211_iterate_active_interfaces(
 648                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 649                 iwl_mvm_power_update_iterator, mvm);
 650
 651         iwl_mvm_mac_ctxt_release(mvm, vif);
 652  out_unlock:
 653         mutex_unlock(&mvm->mutex);
 654
 655         return ret;
 656 }
 657
 658 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 659                                         struct ieee80211_vif *vif)
 660 {
 661         u32 tfd_msk = 0, ac;
 662
 663         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 664                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 665                         tfd_msk |= BIT(vif->hw_queue[ac]);
 666
 667         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 668                 tfd_msk |= BIT(vif->cab_queue);
 669
 670         if (tfd_msk) {
 671                 mutex_lock(&mvm->mutex);
 672                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 673                 mutex_unlock(&mvm->mutex);
 674         }
 675
 676         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 677                 /*
 678                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 679                  * We assume here that all the packets sent to the OFFCHANNEL
 680                  * queue are sent in ROC session.
 681                  */
 682                 flush_work(&mvm->roc_done_wk);
 683         } else {
 684                 /*
 685                  * By now, all the AC queues are empty. The AGG queues are
 686                  * empty too. We already got all the Tx responses for all the
 687                  * packets in the queues. The drain work can have been
 688                  * triggered. Flush it.
 689                  */
 690                 flush_work(&mvm->sta_drained_wk);
 691         }
 692 }
 693
 694 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 695                                          struct ieee80211_vif *vif)
 696 {
 697         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 698         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 699
 700         iwl_mvm_prepare_mac_removal(mvm, vif);
 701
 702         mutex_lock(&mvm->mutex);
 703
 704         if (mvm->bf_allowed_vif == mvmvif) {
 705                 mvm->bf_allowed_vif = NULL;
 706                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 707                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 708         }
 709
 710         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 711
 712         /*
 713          * For AP/GO interface, the tear down of the resources allocated to the
 714          * interface is be handled as part of the stop_ap flow.
 715          */
 716         if (vif->type == NL80211_IFTYPE_AP ||
 717             vif->type == NL80211_IFTYPE_ADHOC) {
 718 #ifdef CONFIG_NL80211_TESTMODE
 719                 if (vif == mvm->noa_vif) {
 720                         mvm->noa_vif = NULL;
 721                         mvm->noa_duration = 0;
 722                 }
 723 #endif
 724                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 725                 goto out_release;
 726         }
 727
 728         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 729                 mvm->p2p_device_vif = NULL;
 730                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 731                 iwl_mvm_binding_remove_vif(mvm, vif);
 732                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 733                 mvmvif->phy_ctxt = NULL;
 734         }
 735
 736         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 737                 mvm->vif_count--;
 738
 739         /* TODO: remove this when legacy PM will be discarded */
 740         ieee80211_iterate_active_interfaces(
 741                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 742                 iwl_mvm_power_update_iterator, mvm);
 743
 744         iwl_mvm_mac_ctxt_remove(mvm, vif);
 745
 746 out_release:
 747         iwl_mvm_mac_ctxt_release(mvm, vif);
 748         mutex_unlock(&mvm->mutex);
 749 }
 750
 751 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 752 {
 753         return 0;
 754 }
 755
 756 struct iwl_mvm_mc_iter_data {
 757         struct iwl_mvm *mvm;
 758         int port_id;
 759 };
 760
 761 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
 762                                       struct ieee80211_vif *vif)
 763 {
 764         struct iwl_mvm_mc_iter_data *data = _data;
 765         struct iwl_mvm *mvm = data->mvm;
 766         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
 767         int ret, len;
 768
 769         /* if we don't have free ports, mcast frames will be dropped */
 770         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
 771                 return;
 772
 773         if (vif->type != NL80211_IFTYPE_STATION ||
 774             !vif->bss_conf.assoc)
 775                 return;
 776
 777         cmd->port_id = data->port_id++;
 778         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
 779         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
 780
 781         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC, len, cmd);
 782         if (ret)
 783                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
 784 }
 785
 786 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
 787 {
 788         struct iwl_mvm_mc_iter_data iter_data = {
 789                 .mvm = mvm,
 790         };
 791
 792         lockdep_assert_held(&mvm->mutex);
 793
 794         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
 795                 return;
 796
 797         ieee80211_iterate_active_interfaces(
 798                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 799                 iwl_mvm_mc_iface_iterator, &iter_data);
 800 }
 801
 802 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
 803                                      struct netdev_hw_addr_list *mc_list)
 804 {
 805         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 806         struct iwl_mcast_filter_cmd *cmd;
 807         struct netdev_hw_addr *addr;
 808         int addr_count = netdev_hw_addr_list_count(mc_list);
 809         bool pass_all = false;
 810         int len;
 811
 812         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
 813                 pass_all = true;
 814                 addr_count = 0;
 815         }
 816
 817         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
 818         cmd = kzalloc(len, GFP_ATOMIC);
 819         if (!cmd)
 820                 return 0;
 821
 822         if (pass_all) {
 823                 cmd->pass_all = 1;
 824                 return (u64)(unsigned long)cmd;
 825         }
 826
 827         netdev_hw_addr_list_for_each(addr, mc_list) {
 828                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
 829                                    cmd->count, addr->addr);
 830                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
 831                        addr->addr, ETH_ALEN);
 832                 cmd->count++;
 833         }
 834
 835         return (u64)(unsigned long)cmd;
 836 }
 837
 838 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
 839                                      unsigned int changed_flags,
 840                                      unsigned int *total_flags,
 841                                      u64 multicast)
 842 {
 843         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 844         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
 845
 846         mutex_lock(&mvm->mutex);
 847
 848         /* replace previous configuration */
 849         kfree(mvm->mcast_filter_cmd);
 850         mvm->mcast_filter_cmd = cmd;
 851
 852         if (!cmd)
 853                 goto out;
 854
 855         iwl_mvm_recalc_multicast(mvm);
 856 out:
 857         mutex_unlock(&mvm->mutex);
 858         *total_flags = 0;
 859 }
 860
 861 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 862                                              struct ieee80211_vif *vif,
 863                                              struct ieee80211_bss_conf *bss_conf,
 864                                              u32 changes)
 865 {
 866         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 867         int ret;
 868
 869         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 870         if (ret)
 871                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
 872
 873         if (changes & BSS_CHANGED_ASSOC) {
 874                 if (bss_conf->assoc) {
 875                         /* add quota for this interface */
 876                         ret = iwl_mvm_update_quotas(mvm, vif);
 877                         if (ret) {
 878                                 IWL_ERR(mvm, "failed to update quotas\n");
 879                                 return;
 880                         }
 881
 882                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 883                                      &mvm->status)) {
 884                                 /*
 885                                  * If we're restarting then the firmware will
 886                                  * obviously have lost synchronisation with
 887                                  * the AP. It will attempt to synchronise by
 888                                  * itself, but we can make it more reliable by
 889                                  * scheduling a session protection time event.
 890                                  *
 891                                  * The firmware needs to receive a beacon to
 892                                  * catch up with synchronisation, use 110% of
 893                                  * the beacon interval.
 894                                  *
 895                                  * Set a large maximum delay to allow for more
 896                                  * than a single interface.
 897                                  */
 898                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
 899                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
 900                                                         5 * dur);
 901                         }
 902
 903                         iwl_mvm_sf_update(mvm, vif, false);
 904                         iwl_mvm_power_vif_assoc(mvm, vif);
 905                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
 906                         /*
 907                          * If update fails - SF might be running in associated
 908                          * mode while disassociated - which is forbidden.
 909                          */
 910                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
 911                                   "Failed to update SF upon disassociation\n");
 912
 913                         /* remove AP station now that the MAC is unassoc */
 914                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
 915                         if (ret)
 916                                 IWL_ERR(mvm, "failed to remove AP station\n");
 917                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 918                         /* remove quota for this interface */
 919                         ret = iwl_mvm_update_quotas(mvm, NULL);
 920                         if (ret)
 921                                 IWL_ERR(mvm, "failed to update quotas\n");
 922                 }
 923
 924                 iwl_mvm_recalc_multicast(mvm);
 925
 926                 /* reset rssi values */
 927                 mvmvif->bf_data.ave_beacon_signal = 0;
 928
 929                 if (!(mvm->fw->ucode_capa.flags &
 930                                         IWL_UCODE_TLV_FLAGS_PM_CMD_SUPPORT)) {
 931                         /* Workaround for FW bug, otherwise FW disables device
 932                          * power save upon disassociation
 933                          */
 934                         ret = iwl_mvm_power_update_mode(mvm, vif);
 935                         if (ret)
 936                                 IWL_ERR(mvm, "failed to update power mode\n");
 937                 }
 938                 iwl_mvm_bt_coex_vif_change(mvm);
 939         } else if (changes & BSS_CHANGED_BEACON_INFO) {
 940                 /*
 941                  * We received a beacon _after_ association so
 942                  * remove the session protection.
 943                  */
 944                 iwl_mvm_remove_time_event(mvm, mvmvif,
 945                                           &mvmvif->time_event_data);
 946         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
 947                               BSS_CHANGED_QOS)) {
 948                 ret = iwl_mvm_power_update_mode(mvm, vif);
 949                 if (ret)
 950                         IWL_ERR(mvm, "failed to update power mode\n");
 951         }
 952         if (changes & BSS_CHANGED_TXPOWER) {
 953                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
 954                                 bss_conf->txpower);
 955                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
 956         }
 957
 958         if (changes & BSS_CHANGED_CQM) {
 959                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed");
 960                 /* reset cqm events tracking */
 961                 mvmvif->bf_data.last_cqm_event = 0;
 962                 ret = iwl_mvm_update_beacon_filter(mvm, vif);
 963                 if (ret)
 964                         IWL_ERR(mvm, "failed to update CQM thresholds\n");
 965         }
 966 }
 967
 968 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
 969                                  struct ieee80211_vif *vif)
 970 {
 971         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 972         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 973         int ret;
 974
 975         mutex_lock(&mvm->mutex);
 976
 977         /* Send the beacon template */
 978         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
 979         if (ret)
 980                 goto out_unlock;
 981
 982         /* Add the mac context */
 983         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 984         if (ret)
 985                 goto out_unlock;
 986
 987         /* Perform the binding */
 988         ret = iwl_mvm_binding_add_vif(mvm, vif);
 989         if (ret)
 990                 goto out_remove;
 991
 992         mvmvif->ap_ibss_active = true;
 993
 994         /* Send the bcast station. At this stage the TBTT and DTIM time events
 995          * are added and applied to the scheduler */
 996         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 997         if (ret)
 998                 goto out_unbind;
 999
1000         ret = iwl_mvm_update_quotas(mvm, vif);
1001         if (ret)
1002                 goto out_rm_bcast;
1003
1004         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1005         if (vif->p2p && mvm->p2p_device_vif)
1006                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
1007
1008         iwl_mvm_bt_coex_vif_change(mvm);
1009
1010         mutex_unlock(&mvm->mutex);
1011         return 0;
1012
1013 out_rm_bcast:
1014         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1015 out_unbind:
1016         iwl_mvm_binding_remove_vif(mvm, vif);
1017 out_remove:
1018         iwl_mvm_mac_ctxt_remove(mvm, vif);
1019 out_unlock:
1020         mutex_unlock(&mvm->mutex);
1021         return ret;
1022 }
1023
1024 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1025                                  struct ieee80211_vif *vif)
1026 {
1027         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1028         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1029
1030         iwl_mvm_prepare_mac_removal(mvm, vif);
1031
1032         mutex_lock(&mvm->mutex);
1033
1034         mvmvif->ap_ibss_active = false;
1035
1036         iwl_mvm_bt_coex_vif_change(mvm);
1037
1038         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1039         if (vif->p2p && mvm->p2p_device_vif)
1040                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
1041
1042         iwl_mvm_update_quotas(mvm, NULL);
1043         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1044         iwl_mvm_binding_remove_vif(mvm, vif);
1045         iwl_mvm_mac_ctxt_remove(mvm, vif);
1046
1047         mutex_unlock(&mvm->mutex);
1048 }
1049
1050 static void
1051 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1052                                  struct ieee80211_vif *vif,
1053                                  struct ieee80211_bss_conf *bss_conf,
1054                                  u32 changes)
1055 {
1056         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1057         enum ieee80211_bss_change ht_change = BSS_CHANGED_ERP_CTS_PROT |
1058                                               BSS_CHANGED_HT |
1059                                               BSS_CHANGED_BANDWIDTH;
1060         int ret;
1061
1062         /* Changes will be applied when the AP/IBSS is started */
1063         if (!mvmvif->ap_ibss_active)
1064                 return;
1065
1066         if (changes & ht_change) {
1067                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1068                 if (ret)
1069                         IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1070         }
1071
1072         /* Need to send a new beacon template to the FW */
1073         if (changes & BSS_CHANGED_BEACON) {
1074                 if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1075                         IWL_WARN(mvm, "Failed updating beacon data\n");
1076         }
1077 }
1078
1079 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1080                                      struct ieee80211_vif *vif,
1081                                      struct ieee80211_bss_conf *bss_conf,
1082                                      u32 changes)
1083 {
1084         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1085
1086         mutex_lock(&mvm->mutex);
1087
1088         switch (vif->type) {
1089         case NL80211_IFTYPE_STATION:
1090                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1091                 break;
1092         case NL80211_IFTYPE_AP:
1093         case NL80211_IFTYPE_ADHOC:
1094                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1095                 break;
1096         default:
1097                 /* shouldn't happen */
1098                 WARN_ON_ONCE(1);
1099         }
1100
1101         mutex_unlock(&mvm->mutex);
1102 }
1103
1104 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1105                                struct ieee80211_vif *vif,
1106                                struct cfg80211_scan_request *req)
1107 {
1108         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1109         int ret;
1110
1111         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
1112                 return -EINVAL;
1113
1114         mutex_lock(&mvm->mutex);
1115
1116         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1117                 ret = iwl_mvm_scan_request(mvm, vif, req);
1118         else
1119                 ret = -EBUSY;
1120
1121         mutex_unlock(&mvm->mutex);
1122
1123         return ret;
1124 }
1125
1126 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1127                                        struct ieee80211_vif *vif)
1128 {
1129         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1130
1131         mutex_lock(&mvm->mutex);
1132
1133         iwl_mvm_cancel_scan(mvm);
1134
1135         mutex_unlock(&mvm->mutex);
1136 }
1137
1138 static void
1139 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1140                                   struct ieee80211_sta *sta, u16 tid,
1141                                   int num_frames,
1142                                   enum ieee80211_frame_release_type reason,
1143                                   bool more_data)
1144 {
1145         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1146
1147         /* TODO: how do we tell the fw to send frames for a specific TID */
1148
1149         /*
1150          * The fw will send EOSP notification when the last frame will be
1151          * transmitted.
1152          */
1153         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
1154 }
1155
1156 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1157                                    struct ieee80211_vif *vif,
1158                                    enum sta_notify_cmd cmd,
1159                                    struct ieee80211_sta *sta)
1160 {
1161         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1162         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1163
1164         switch (cmd) {
1165         case STA_NOTIFY_SLEEP:
1166                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1167                         ieee80211_sta_block_awake(hw, sta, true);
1168                 /*
1169                  * The fw updates the STA to be asleep. Tx packets on the Tx
1170                  * queues to this station will not be transmitted. The fw will
1171                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1172                  */
1173                 break;
1174         case STA_NOTIFY_AWAKE:
1175                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1176                         break;
1177                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1178                 break;
1179         default:
1180                 break;
1181         }
1182 }
1183
1184 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1185                                        struct ieee80211_vif *vif,
1186                                        struct ieee80211_sta *sta)
1187 {
1188         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1189         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1190
1191         /*
1192          * This is called before mac80211 does RCU synchronisation,
1193          * so here we already invalidate our internal RCU-protected
1194          * station pointer. The rest of the code will thus no longer
1195          * be able to find the station this way, and we don't rely
1196          * on further RCU synchronisation after the sta_state()
1197          * callback deleted the station.
1198          */
1199         mutex_lock(&mvm->mutex);
1200         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1201                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1202                                    ERR_PTR(-ENOENT));
1203         mutex_unlock(&mvm->mutex);
1204 }
1205
1206 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1207                                  struct ieee80211_vif *vif,
1208                                  struct ieee80211_sta *sta,
1209                                  enum ieee80211_sta_state old_state,
1210                                  enum ieee80211_sta_state new_state)
1211 {
1212         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1213         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1214         int ret;
1215
1216         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1217                            sta->addr, old_state, new_state);
1218
1219         /* this would be a mac80211 bug ... but don't crash */
1220         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1221                 return -EINVAL;
1222
1223         /* if a STA is being removed, reuse its ID */
1224         flush_work(&mvm->sta_drained_wk);
1225
1226         mutex_lock(&mvm->mutex);
1227         if (old_state == IEEE80211_STA_NOTEXIST &&
1228             new_state == IEEE80211_STA_NONE) {
1229                 /*
1230                  * Firmware bug - it'll crash if the beacon interval is less
1231                  * than 16. We can't avoid connecting at all, so refuse the
1232                  * station state change, this will cause mac80211 to abandon
1233                  * attempts to connect to this AP, and eventually wpa_s will
1234                  * blacklist the AP...
1235                  */
1236                 if (vif->type == NL80211_IFTYPE_STATION &&
1237                     vif->bss_conf.beacon_int < 16) {
1238                         IWL_ERR(mvm,
1239                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1240                                 sta->addr, vif->bss_conf.beacon_int);
1241                         ret = -EINVAL;
1242                         goto out_unlock;
1243                 }
1244                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1245         } else if (old_state == IEEE80211_STA_NONE &&
1246                    new_state == IEEE80211_STA_AUTH) {
1247                 ret = 0;
1248         } else if (old_state == IEEE80211_STA_AUTH &&
1249                    new_state == IEEE80211_STA_ASSOC) {
1250                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1251                 if (ret == 0)
1252                         iwl_mvm_rs_rate_init(mvm, sta,
1253                                              mvmvif->phy_ctxt->channel->band,
1254                                              true);
1255         } else if (old_state == IEEE80211_STA_ASSOC &&
1256                    new_state == IEEE80211_STA_AUTHORIZED) {
1257                 /* enable beacon filtering */
1258                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif));
1259                 ret = 0;
1260         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1261                    new_state == IEEE80211_STA_ASSOC) {
1262                 /* disable beacon filtering */
1263                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif));
1264                 ret = 0;
1265         } else if (old_state == IEEE80211_STA_ASSOC &&
1266                    new_state == IEEE80211_STA_AUTH) {
1267                 ret = 0;
1268         } else if (old_state == IEEE80211_STA_AUTH &&
1269                    new_state == IEEE80211_STA_NONE) {
1270                 ret = 0;
1271         } else if (old_state == IEEE80211_STA_NONE &&
1272                    new_state == IEEE80211_STA_NOTEXIST) {
1273                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1274         } else {
1275                 ret = -EIO;
1276         }
1277  out_unlock:
1278         mutex_unlock(&mvm->mutex);
1279
1280         return ret;
1281 }
1282
1283 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1284 {
1285         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1286
1287         mvm->rts_threshold = value;
1288
1289         return 0;
1290 }
1291
1292 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1293                                   struct ieee80211_vif *vif,
1294                                   struct ieee80211_sta *sta, u32 changed)
1295 {
1296         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1297
1298         if (vif->type == NL80211_IFTYPE_STATION &&
1299             changed & IEEE80211_RC_NSS_CHANGED)
1300                 iwl_mvm_sf_update(mvm, vif, false);
1301 }
1302
1303 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1304                                struct ieee80211_vif *vif, u16 ac,
1305                                const struct ieee80211_tx_queue_params *params)
1306 {
1307         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1308         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1309
1310         mvmvif->queue_params[ac] = *params;
1311
1312         /*
1313          * No need to update right away, we'll get BSS_CHANGED_QOS
1314          * The exception is P2P_DEVICE interface which needs immediate update.
1315          */
1316         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1317                 int ret;
1318
1319                 mutex_lock(&mvm->mutex);
1320                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1321                 mutex_unlock(&mvm->mutex);
1322                 return ret;
1323         }
1324         return 0;
1325 }
1326
1327 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1328                                       struct ieee80211_vif *vif)
1329 {
1330         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1331         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1332                            200 + vif->bss_conf.beacon_int);
1333         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1334                                100 + vif->bss_conf.beacon_int);
1335
1336         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1337                 return;
1338
1339         mutex_lock(&mvm->mutex);
1340         /* Try really hard to protect the session and hear a beacon */
1341         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1342         mutex_unlock(&mvm->mutex);
1343 }
1344
1345 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1346                                         struct ieee80211_vif *vif,
1347                                         struct cfg80211_sched_scan_request *req,
1348                                         struct ieee80211_sched_scan_ies *ies)
1349 {
1350         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1351         int ret;
1352
1353         mutex_lock(&mvm->mutex);
1354
1355         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1356                 IWL_DEBUG_SCAN(mvm,
1357                                "SCHED SCAN request during internal scan - abort\n");
1358                 ret = -EBUSY;
1359                 goto out;
1360         }
1361
1362         mvm->scan_status = IWL_MVM_SCAN_SCHED;
1363
1364         ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1365         if (ret)
1366                 goto err;
1367
1368         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1369         if (ret)
1370                 goto err;
1371
1372         ret = iwl_mvm_sched_scan_start(mvm, req);
1373         if (!ret)
1374                 goto out;
1375 err:
1376         mvm->scan_status = IWL_MVM_SCAN_NONE;
1377 out:
1378         mutex_unlock(&mvm->mutex);
1379         return ret;
1380 }
1381
1382 static void iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
1383                                         struct ieee80211_vif *vif)
1384 {
1385         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1386
1387         mutex_lock(&mvm->mutex);
1388         iwl_mvm_sched_scan_stop(mvm);
1389         mutex_unlock(&mvm->mutex);
1390 }
1391
1392 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1393                                enum set_key_cmd cmd,
1394                                struct ieee80211_vif *vif,
1395                                struct ieee80211_sta *sta,
1396                                struct ieee80211_key_conf *key)
1397 {
1398         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1399         int ret;
1400
1401         if (iwlwifi_mod_params.sw_crypto) {
1402                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1403                 return -EOPNOTSUPP;
1404         }
1405
1406         switch (key->cipher) {
1407         case WLAN_CIPHER_SUITE_TKIP:
1408                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1409                 /* fall-through */
1410         case WLAN_CIPHER_SUITE_CCMP:
1411                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1412                 break;
1413         case WLAN_CIPHER_SUITE_AES_CMAC:
1414                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1415                 break;
1416         case WLAN_CIPHER_SUITE_WEP40:
1417         case WLAN_CIPHER_SUITE_WEP104:
1418                 /*
1419                  * Support for TX only, at least for now, so accept
1420                  * the key and do nothing else. Then mac80211 will
1421                  * pass it for TX but we don't have to use it for RX.
1422                  */
1423                 return 0;
1424         default:
1425                 /* currently FW supports only one optional cipher scheme */
1426                 if (hw->n_cipher_schemes &&
1427                     hw->cipher_schemes->cipher == key->cipher)
1428                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
1429                 else
1430                         return -EOPNOTSUPP;
1431         }
1432
1433         mutex_lock(&mvm->mutex);
1434
1435         switch (cmd) {
1436         case SET_KEY:
1437                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1438                      vif->type == NL80211_IFTYPE_AP) && !sta) {
1439                         /*
1440                          * GTK on AP interface is a TX-only key, return 0;
1441                          * on IBSS they're per-station and because we're lazy
1442                          * we don't support them for RX, so do the same.
1443                          */
1444                         ret = 0;
1445                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1446                         break;
1447                 }
1448
1449                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1450                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1451                 if (ret) {
1452                         IWL_WARN(mvm, "set key failed\n");
1453                         /*
1454                          * can't add key for RX, but we don't need it
1455                          * in the device for TX so still return 0
1456                          */
1457                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1458                         ret = 0;
1459                 }
1460
1461                 break;
1462         case DISABLE_KEY:
1463                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1464                         ret = 0;
1465                         break;
1466                 }
1467
1468                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1469                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1470                 break;
1471         default:
1472                 ret = -EINVAL;
1473         }
1474
1475         mutex_unlock(&mvm->mutex);
1476         return ret;
1477 }
1478
1479 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1480                                         struct ieee80211_vif *vif,
1481                                         struct ieee80211_key_conf *keyconf,
1482                                         struct ieee80211_sta *sta,
1483                                         u32 iv32, u16 *phase1key)
1484 {
1485         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1486
1487         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1488                 return;
1489
1490         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
1491 }
1492
1493
1494 static int iwl_mvm_roc(struct ieee80211_hw *hw,
1495                        struct ieee80211_vif *vif,
1496                        struct ieee80211_channel *channel,
1497                        int duration,
1498                        enum ieee80211_roc_type type)
1499 {
1500         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1501         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1502         struct cfg80211_chan_def chandef;
1503         struct iwl_mvm_phy_ctxt *phy_ctxt;
1504         int ret, i;
1505
1506         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
1507                            duration, type);
1508
1509         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
1510                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
1511                 return -EINVAL;
1512         }
1513
1514         mutex_lock(&mvm->mutex);
1515
1516         for (i = 0; i < NUM_PHY_CTX; i++) {
1517                 phy_ctxt = &mvm->phy_ctxts[i];
1518                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
1519                         continue;
1520
1521                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
1522                         /*
1523                          * Unbind the P2P_DEVICE from the current PHY context,
1524                          * and if the PHY context is not used remove it.
1525                          */
1526                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
1527                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1528                                 goto out_unlock;
1529
1530                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1531
1532                         /* Bind the P2P_DEVICE to the current PHY Context */
1533                         mvmvif->phy_ctxt = phy_ctxt;
1534
1535                         ret = iwl_mvm_binding_add_vif(mvm, vif);
1536                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1537                                 goto out_unlock;
1538
1539                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1540                         goto schedule_time_event;
1541                 }
1542         }
1543
1544         /* Need to update the PHY context only if the ROC channel changed */
1545         if (channel == mvmvif->phy_ctxt->channel)
1546                 goto schedule_time_event;
1547
1548         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
1549
1550         /*
1551          * Change the PHY context configuration as it is currently referenced
1552          * only by the P2P Device MAC
1553          */
1554         if (mvmvif->phy_ctxt->ref == 1) {
1555                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
1556                                                &chandef, 1, 1);
1557                 if (ret)
1558                         goto out_unlock;
1559         } else {
1560                 /*
1561                  * The PHY context is shared with other MACs. Need to remove the
1562                  * P2P Device from the binding, allocate an new PHY context and
1563                  * create a new binding
1564                  */
1565                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1566                 if (!phy_ctxt) {
1567                         ret = -ENOSPC;
1568                         goto out_unlock;
1569                 }
1570
1571                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
1572                                                1, 1);
1573                 if (ret) {
1574                         IWL_ERR(mvm, "Failed to change PHY context\n");
1575                         goto out_unlock;
1576                 }
1577
1578                 /* Unbind the P2P_DEVICE from the current PHY context */
1579                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
1580                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1581                         goto out_unlock;
1582
1583                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1584
1585                 /* Bind the P2P_DEVICE to the new allocated PHY context */
1586                 mvmvif->phy_ctxt = phy_ctxt;
1587
1588                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1589                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1590                         goto out_unlock;
1591
1592                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1593         }
1594
1595 schedule_time_event:
1596         /* Schedule the time events */
1597         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
1598
1599 out_unlock:
1600         mutex_unlock(&mvm->mutex);
1601         IWL_DEBUG_MAC80211(mvm, "leave\n");
1602         return ret;
1603 }
1604
1605 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
1606 {
1607         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1608
1609         IWL_DEBUG_MAC80211(mvm, "enter\n");
1610
1611         mutex_lock(&mvm->mutex);
1612         iwl_mvm_stop_p2p_roc(mvm);
1613         mutex_unlock(&mvm->mutex);
1614
1615         IWL_DEBUG_MAC80211(mvm, "leave\n");
1616         return 0;
1617 }
1618
1619 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
1620                                struct ieee80211_chanctx_conf *ctx)
1621 {
1622         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1623         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1624         struct iwl_mvm_phy_ctxt *phy_ctxt;
1625         int ret;
1626
1627         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
1628
1629         mutex_lock(&mvm->mutex);
1630         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1631         if (!phy_ctxt) {
1632                 ret = -ENOSPC;
1633                 goto out;
1634         }
1635
1636         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
1637                                        ctx->rx_chains_static,
1638                                        ctx->rx_chains_dynamic);
1639         if (ret) {
1640                 IWL_ERR(mvm, "Failed to add PHY context\n");
1641                 goto out;
1642         }
1643
1644         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
1645         *phy_ctxt_id = phy_ctxt->id;
1646 out:
1647         mutex_unlock(&mvm->mutex);
1648         return ret;
1649 }
1650
1651 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
1652                                    struct ieee80211_chanctx_conf *ctx)
1653 {
1654         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1655         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1656         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1657
1658         mutex_lock(&mvm->mutex);
1659         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
1660         mutex_unlock(&mvm->mutex);
1661 }
1662
1663 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
1664                                    struct ieee80211_chanctx_conf *ctx,
1665                                    u32 changed)
1666 {
1667         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1668         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1669         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1670
1671         if (WARN_ONCE((phy_ctxt->ref > 1) &&
1672                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
1673                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
1674                                    IEEE80211_CHANCTX_CHANGE_RADAR)),
1675                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
1676                       phy_ctxt->ref, changed))
1677                 return;
1678
1679         mutex_lock(&mvm->mutex);
1680         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
1681                                  ctx->rx_chains_static,
1682                                  ctx->rx_chains_dynamic);
1683         iwl_mvm_bt_coex_vif_change(mvm);
1684         mutex_unlock(&mvm->mutex);
1685 }
1686
1687 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
1688                                       struct ieee80211_vif *vif,
1689                                       struct ieee80211_chanctx_conf *ctx)
1690 {
1691         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1692         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1693         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1694         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1695         int ret;
1696
1697         mutex_lock(&mvm->mutex);
1698
1699         mvmvif->phy_ctxt = phy_ctxt;
1700
1701         switch (vif->type) {
1702         case NL80211_IFTYPE_AP:
1703         case NL80211_IFTYPE_ADHOC:
1704                 /*
1705                  * The AP binding flow is handled as part of the start_ap flow
1706                  * (in bss_info_changed), similarly for IBSS.
1707                  */
1708                 ret = 0;
1709                 goto out_unlock;
1710         case NL80211_IFTYPE_STATION:
1711         case NL80211_IFTYPE_MONITOR:
1712                 break;
1713         default:
1714                 ret = -EINVAL;
1715                 goto out_unlock;
1716         }
1717
1718         ret = iwl_mvm_binding_add_vif(mvm, vif);
1719         if (ret)
1720                 goto out_unlock;
1721
1722         /*
1723          * Power state must be updated before quotas,
1724          * otherwise fw will complain.
1725          */
1726         mvm->bound_vif_cnt++;
1727         iwl_mvm_power_update_binding(mvm, vif, true);
1728
1729         /* Setting the quota at this stage is only required for monitor
1730          * interfaces. For the other types, the bss_info changed flow
1731          * will handle quota settings.
1732          */
1733         if (vif->type == NL80211_IFTYPE_MONITOR) {
1734                 mvmvif->monitor_active = true;
1735                 ret = iwl_mvm_update_quotas(mvm, vif);
1736                 if (ret)
1737                         goto out_remove_binding;
1738         }
1739
1740         goto out_unlock;
1741
1742  out_remove_binding:
1743         iwl_mvm_binding_remove_vif(mvm, vif);
1744         mvm->bound_vif_cnt--;
1745         iwl_mvm_power_update_binding(mvm, vif, false);
1746  out_unlock:
1747         mutex_unlock(&mvm->mutex);
1748         if (ret)
1749                 mvmvif->phy_ctxt = NULL;
1750         return ret;
1751 }
1752
1753 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
1754                                          struct ieee80211_vif *vif,
1755                                          struct ieee80211_chanctx_conf *ctx)
1756 {
1757         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1758         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1759
1760         mutex_lock(&mvm->mutex);
1761
1762         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
1763
1764         switch (vif->type) {
1765         case NL80211_IFTYPE_AP:
1766         case NL80211_IFTYPE_ADHOC:
1767                 goto out_unlock;
1768         case NL80211_IFTYPE_MONITOR:
1769                 mvmvif->monitor_active = false;
1770                 iwl_mvm_update_quotas(mvm, NULL);
1771                 break;
1772         default:
1773                 break;
1774         }
1775
1776         iwl_mvm_binding_remove_vif(mvm, vif);
1777 out_unlock:
1778         mvmvif->phy_ctxt = NULL;
1779         mvm->bound_vif_cnt--;
1780         iwl_mvm_power_update_binding(mvm, vif, false);
1781
1782         mutex_unlock(&mvm->mutex);
1783 }
1784
1785 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
1786                            struct ieee80211_sta *sta,
1787                            bool set)
1788 {
1789         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1790         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1791
1792         if (!mvm_sta || !mvm_sta->vif) {
1793                 IWL_ERR(mvm, "Station is not associated to a vif\n");
1794                 return -EINVAL;
1795         }
1796
1797         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
1798 }
1799
1800 #ifdef CONFIG_NL80211_TESTMODE
1801 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
1802         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
1803         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
1804         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
1805 };
1806
1807 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
1808                                       struct ieee80211_vif *vif,
1809                                       void *data, int len)
1810 {
1811         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
1812         int err;
1813         u32 noa_duration;
1814
1815         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
1816         if (err)
1817                 return err;
1818
1819         if (!tb[IWL_MVM_TM_ATTR_CMD])
1820                 return -EINVAL;
1821
1822         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
1823         case IWL_MVM_TM_CMD_SET_NOA:
1824                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
1825                     !vif->bss_conf.enable_beacon ||
1826                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
1827                         return -EINVAL;
1828
1829                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
1830                 if (noa_duration >= vif->bss_conf.beacon_int)
1831                         return -EINVAL;
1832
1833                 mvm->noa_duration = noa_duration;
1834                 mvm->noa_vif = vif;
1835
1836                 return iwl_mvm_update_quotas(mvm, NULL);
1837         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
1838                 /* must be associated client vif - ignore authorized */
1839                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
1840                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
1841                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
1842                         return -EINVAL;
1843
1844                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
1845                         return iwl_mvm_enable_beacon_filter(mvm, vif);
1846                 return iwl_mvm_disable_beacon_filter(mvm, vif);
1847         }
1848
1849         return -EOPNOTSUPP;
1850 }
1851
1852 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
1853                                     struct ieee80211_vif *vif,
1854                                     void *data, int len)
1855 {
1856         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1857         int err;
1858
1859         mutex_lock(&mvm->mutex);
1860         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
1861         mutex_unlock(&mvm->mutex);
1862
1863         return err;
1864 }
1865 #endif
1866
1867 struct ieee80211_ops iwl_mvm_hw_ops = {
1868         .tx = iwl_mvm_mac_tx,
1869         .ampdu_action = iwl_mvm_mac_ampdu_action,
1870         .start = iwl_mvm_mac_start,
1871         .restart_complete = iwl_mvm_mac_restart_complete,
1872         .stop = iwl_mvm_mac_stop,
1873         .add_interface = iwl_mvm_mac_add_interface,
1874         .remove_interface = iwl_mvm_mac_remove_interface,
1875         .config = iwl_mvm_mac_config,
1876         .prepare_multicast = iwl_mvm_prepare_multicast,
1877         .configure_filter = iwl_mvm_configure_filter,
1878         .bss_info_changed = iwl_mvm_bss_info_changed,
1879         .hw_scan = iwl_mvm_mac_hw_scan,
1880         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
1881         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
1882         .sta_state = iwl_mvm_mac_sta_state,
1883         .sta_notify = iwl_mvm_mac_sta_notify,
1884         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
1885         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
1886         .sta_rc_update = iwl_mvm_sta_rc_update,
1887         .conf_tx = iwl_mvm_mac_conf_tx,
1888         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
1889         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
1890         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
1891         .set_key = iwl_mvm_mac_set_key,
1892         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
1893         .remain_on_channel = iwl_mvm_roc,
1894         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
1895         .add_chanctx = iwl_mvm_add_chanctx,
1896         .remove_chanctx = iwl_mvm_remove_chanctx,
1897         .change_chanctx = iwl_mvm_change_chanctx,
1898         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
1899         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
1900
1901         .start_ap = iwl_mvm_start_ap_ibss,
1902         .stop_ap = iwl_mvm_stop_ap_ibss,
1903         .join_ibss = iwl_mvm_start_ap_ibss,
1904         .leave_ibss = iwl_mvm_stop_ap_ibss,
1905
1906         .set_tim = iwl_mvm_set_tim,
1907
1908         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
1909
1910 #ifdef CONFIG_PM_SLEEP
1911         /* look at d3.c */
1912         .suspend = iwl_mvm_suspend,
1913         .resume = iwl_mvm_resume,
1914         .set_wakeup = iwl_mvm_set_wakeup,
1915         .set_rekey_data = iwl_mvm_set_rekey_data,
1916 #if IS_ENABLED(CONFIG_IPV6)
1917         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
1918 #endif
1919         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
1920 #endif
1921 };