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  *
  24  * The full GNU General Public License is included in this distribution
  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:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/kernel.h>
  64 #include <linux/slab.h>
  65 #include <linux/skbuff.h>
  66 #include <linux/netdevice.h>
  67 #include <linux/etherdevice.h>
  68 #include <linux/ip.h>
  69 #include <net/mac80211.h>
  70 #include <net/tcp.h>
  71
  72 #include "iwl-op-mode.h"
  73 #include "iwl-io.h"
  74 #include "mvm.h"
  75 #include "sta.h"
  76 #include "time-event.h"
  77 #include "iwl-eeprom-parse.h"
  78 #include "fw-api-scan.h"
  79 #include "iwl-phy-db.h"
  80
  81 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  82         {
  83                 .max = 1,
  84                 .types = BIT(NL80211_IFTYPE_STATION),
  85         },
  86         {
  87                 .max = 1,
  88                 .types = BIT(NL80211_IFTYPE_AP) |
  89                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  90                         BIT(NL80211_IFTYPE_P2P_GO),
  91         },
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
  95         },
  96 };
  97
  98 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
  99         {
 100                 .num_different_channels = 1,
 101                 .max_interfaces = 3,
 102                 .limits = iwl_mvm_limits,
 103                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 104         },
 105 };
 106
 107 #ifdef CONFIG_PM_SLEEP
 108 static const struct nl80211_wowlan_tcp_data_token_feature
 109 iwl_mvm_wowlan_tcp_token_feature = {
 110         .min_len = 0,
 111         .max_len = 255,
 112         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 113 };
 114
 115 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 116         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 117         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 118                             sizeof(struct ethhdr) -
 119                             sizeof(struct iphdr) -
 120                             sizeof(struct tcphdr),
 121         .data_interval_max = 65535, /* __le16 in API */
 122         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .seq = true,
 127 };
 128 #endif
 129
 130 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 131 {
 132         int i;
 133
 134         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 135         for (i = 0; i < NUM_PHY_CTX; i++) {
 136                 mvm->phy_ctxts[i].id = i;
 137                 mvm->phy_ctxts[i].ref = 0;
 138         }
 139 }
 140
 141 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 142 {
 143         struct ieee80211_hw *hw = mvm->hw;
 144         int num_mac, ret, i;
 145
 146         /* Tell mac80211 our characteristics */
 147         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 148                     IEEE80211_HW_SPECTRUM_MGMT |
 149                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 150                     IEEE80211_HW_QUEUE_CONTROL |
 151                     IEEE80211_HW_WANT_MONITOR_VIF |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_AMPDU_AGGREGATION |
 155                     IEEE80211_HW_TIMING_BEACON_ONLY |
 156                     IEEE80211_HW_CONNECTION_MONITOR;
 157
 158         hw->queues = IWL_MVM_FIRST_AGG_QUEUE;
 159         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 160         hw->rate_control_algorithm = "iwl-mvm-rs";
 161
 162         /*
 163          * Enable 11w if advertised by firmware and software crypto
 164          * is not enabled (as the firmware will interpret some mgmt
 165          * packets, so enabling it with software crypto isn't safe)
 166          */
 167         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 168             !iwlwifi_mod_params.sw_crypto)
 169                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 170
 171         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 172         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 173         hw->chanctx_data_size = sizeof(u16);
 174
 175         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 176                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 177                 BIT(NL80211_IFTYPE_AP) |
 178                 BIT(NL80211_IFTYPE_P2P_GO) |
 179                 BIT(NL80211_IFTYPE_P2P_DEVICE);
 180
 181         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 182                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 183                             WIPHY_FLAG_IBSS_RSN;
 184
 185         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 186         hw->wiphy->n_iface_combinations =
 187                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 188
 189         hw->wiphy->max_remain_on_channel_duration = 10000;
 190         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 191
 192         /* Extract MAC address */
 193         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 194         hw->wiphy->addresses = mvm->addresses;
 195         hw->wiphy->n_addresses = 1;
 196
 197         /* Extract additional MAC addresses if available */
 198         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 199                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 200
 201         for (i = 1; i < num_mac; i++) {
 202                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 203                        ETH_ALEN);
 204                 mvm->addresses[i].addr[5]++;
 205                 hw->wiphy->n_addresses++;
 206         }
 207
 208         iwl_mvm_reset_phy_ctxts(mvm);
 209
 210         /* we create the 802.11 header and a max-length SSID element */
 211         hw->wiphy->max_scan_ie_len =
 212                 mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 213         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 214
 215         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 216                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 217                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 218         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 219                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 220                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 221
 222         hw->wiphy->hw_version = mvm->trans->hw_id;
 223
 224         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 225                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 226         else
 227                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 228
 229         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 230                                NL80211_FEATURE_P2P_GO_OPPPS;
 231
 232         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 233
 234 #ifdef CONFIG_PM_SLEEP
 235         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 236             mvm->trans->ops->d3_suspend &&
 237             mvm->trans->ops->d3_resume &&
 238             device_can_wakeup(mvm->trans->dev)) {
 239                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 240                                     WIPHY_WOWLAN_DISCONNECT |
 241                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 242                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 243                 if (!iwlwifi_mod_params.sw_crypto)
 244                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 245                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 246                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 247
 248                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 249                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 250                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 251                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 252                 hw->wiphy->wowlan = &mvm->wowlan;
 253         }
 254 #endif
 255
 256         ret = iwl_mvm_leds_init(mvm);
 257         if (ret)
 258                 return ret;
 259
 260         ret = ieee80211_register_hw(mvm->hw);
 261         if (ret)
 262                 iwl_mvm_leds_exit(mvm);
 263
 264         return ret;
 265 }
 266
 267 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 268                            struct ieee80211_tx_control *control,
 269                            struct sk_buff *skb)
 270 {
 271         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 272
 273         if (iwl_mvm_is_radio_killed(mvm)) {
 274                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 275                 goto drop;
 276         }
 277
 278         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 279             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 280                 goto drop;
 281
 282         if (control->sta) {
 283                 if (iwl_mvm_tx_skb(mvm, skb, control->sta))
 284                         goto drop;
 285                 return;
 286         }
 287
 288         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 289                 goto drop;
 290         return;
 291  drop:
 292         ieee80211_free_txskb(hw, skb);
 293 }
 294
 295 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 296                                     struct ieee80211_vif *vif,
 297                                     enum ieee80211_ampdu_mlme_action action,
 298                                     struct ieee80211_sta *sta, u16 tid,
 299                                     u16 *ssn, u8 buf_size)
 300 {
 301         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 302         int ret;
 303
 304         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 305                      sta->addr, tid, action);
 306
 307         if (!(mvm->nvm_data->sku_cap_11n_enable))
 308                 return -EACCES;
 309
 310         mutex_lock(&mvm->mutex);
 311
 312         switch (action) {
 313         case IEEE80211_AMPDU_RX_START:
 314                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) {
 315                         ret = -EINVAL;
 316                         break;
 317                 }
 318                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 319                 break;
 320         case IEEE80211_AMPDU_RX_STOP:
 321                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 322                 break;
 323         case IEEE80211_AMPDU_TX_START:
 324                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) {
 325                         ret = -EINVAL;
 326                         break;
 327                 }
 328                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 329                 break;
 330         case IEEE80211_AMPDU_TX_STOP_CONT:
 331                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 332                 break;
 333         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 334         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 335                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 336                 break;
 337         case IEEE80211_AMPDU_TX_OPERATIONAL:
 338                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 339                 break;
 340         default:
 341                 WARN_ON_ONCE(1);
 342                 ret = -EINVAL;
 343                 break;
 344         }
 345         mutex_unlock(&mvm->mutex);
 346
 347         return ret;
 348 }
 349
 350 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 351                                      struct ieee80211_vif *vif)
 352 {
 353         struct iwl_mvm *mvm = data;
 354         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 355
 356         mvmvif->uploaded = false;
 357         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 358
 359         /* does this make sense at all? */
 360         mvmvif->color++;
 361
 362         spin_lock_bh(&mvm->time_event_lock);
 363         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 364         spin_unlock_bh(&mvm->time_event_lock);
 365
 366         mvmvif->phy_ctxt = NULL;
 367 }
 368
 369 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 370 {
 371         iwl_trans_stop_device(mvm->trans);
 372         iwl_trans_stop_hw(mvm->trans, false);
 373
 374         mvm->scan_status = IWL_MVM_SCAN_NONE;
 375
 376         /* just in case one was running */
 377         ieee80211_remain_on_channel_expired(mvm->hw);
 378
 379         ieee80211_iterate_active_interfaces_atomic(
 380                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 381                 iwl_mvm_cleanup_iterator, mvm);
 382
 383         mvm->p2p_device_vif = NULL;
 384
 385         iwl_mvm_reset_phy_ctxts(mvm);
 386         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 387         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 388
 389         ieee80211_wake_queues(mvm->hw);
 390
 391         mvm->vif_count = 0;
 392         mvm->rx_ba_sessions = 0;
 393 }
 394
 395 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 396 {
 397         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 398         int ret;
 399
 400         mutex_lock(&mvm->mutex);
 401
 402         /* Clean up some internal and mac80211 state on restart */
 403         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 404                 iwl_mvm_restart_cleanup(mvm);
 405
 406         ret = iwl_mvm_up(mvm);
 407         mutex_unlock(&mvm->mutex);
 408
 409         return ret;
 410 }
 411
 412 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 413 {
 414         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 415         int ret;
 416
 417         mutex_lock(&mvm->mutex);
 418
 419         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 420         ret = iwl_mvm_update_quotas(mvm, NULL);
 421         if (ret)
 422                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 423                         ret);
 424
 425         mutex_unlock(&mvm->mutex);
 426 }
 427
 428 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 429 {
 430         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 431
 432         flush_work(&mvm->async_handlers_wk);
 433
 434         mutex_lock(&mvm->mutex);
 435         /* async_handlers_wk is now blocked */
 436
 437         /*
 438          * The work item could be running or queued if the
 439          * ROC time event stops just as we get here.
 440          */
 441         cancel_work_sync(&mvm->roc_done_wk);
 442
 443         iwl_trans_stop_device(mvm->trans);
 444         iwl_trans_stop_hw(mvm->trans, false);
 445
 446         iwl_mvm_async_handlers_purge(mvm);
 447         /* async_handlers_list is empty and will stay empty: HW is stopped */
 448
 449         /* the fw is stopped, the aux sta is dead: clean up driver state */
 450         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 451
 452         mutex_unlock(&mvm->mutex);
 453
 454         /*
 455          * The worker might have been waiting for the mutex, let it run and
 456          * discover that its list is now empty.
 457          */
 458         cancel_work_sync(&mvm->async_handlers_wk);
 459 }
 460
 461 static void iwl_mvm_pm_disable_iterator(void *data, u8 *mac,
 462                                         struct ieee80211_vif *vif)
 463 {
 464         struct iwl_mvm *mvm = data;
 465         int ret;
 466
 467         ret = iwl_mvm_power_disable(mvm, vif);
 468         if (ret)
 469                 IWL_ERR(mvm, "failed to disable power management\n");
 470 }
 471
 472 static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
 473                                           struct ieee80211_vif *vif)
 474 {
 475         struct iwl_mvm *mvm = data;
 476
 477         iwl_mvm_power_update_mode(mvm, vif);
 478 }
 479
 480 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 481 {
 482         u16 i;
 483
 484         lockdep_assert_held(&mvm->mutex);
 485
 486         for (i = 0; i < NUM_PHY_CTX; i++)
 487                 if (!mvm->phy_ctxts[i].ref)
 488                         return &mvm->phy_ctxts[i];
 489
 490         IWL_ERR(mvm, "No available PHY context\n");
 491         return NULL;
 492 }
 493
 494 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 495                                      struct ieee80211_vif *vif)
 496 {
 497         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 498         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 499         int ret;
 500
 501         /*
 502          * Not much to do here. The stack will not allow interface
 503          * types or combinations that we didn't advertise, so we
 504          * don't really have to check the types.
 505          */
 506
 507         mutex_lock(&mvm->mutex);
 508
 509         /* Allocate resources for the MAC context, and add it the the fw  */
 510         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 511         if (ret)
 512                 goto out_unlock;
 513
 514         /*
 515          * TODO: remove this temporary code.
 516          * Currently MVM FW supports power management only on single MAC.
 517          * If new interface added, disable PM on existing interface.
 518          * P2P device is a special case, since it is handled by FW similary to
 519          * scan. If P2P deviced is added, PM remains enabled on existing
 520          * interface.
 521          * Note: the method below does not count the new interface being added
 522          * at this moment.
 523          */
 524         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 525                 mvm->vif_count++;
 526         if (mvm->vif_count > 1) {
 527                 IWL_DEBUG_MAC80211(mvm,
 528                                    "Disable power on existing interfaces\n");
 529                 ieee80211_iterate_active_interfaces_atomic(
 530                                             mvm->hw,
 531                                             IEEE80211_IFACE_ITER_NORMAL,
 532                                             iwl_mvm_pm_disable_iterator, mvm);
 533         }
 534
 535         /*
 536          * The AP binding flow can be done only after the beacon
 537          * template is configured (which happens only in the mac80211
 538          * start_ap() flow), and adding the broadcast station can happen
 539          * only after the binding.
 540          * In addition, since modifying the MAC before adding a bcast
 541          * station is not allowed by the FW, delay the adding of MAC context to
 542          * the point where we can also add the bcast station.
 543          * In short: there's not much we can do at this point, other than
 544          * allocating resources :)
 545          */
 546         if (vif->type == NL80211_IFTYPE_AP) {
 547                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 548                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 549                                                qmask);
 550                 if (ret) {
 551                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 552                         goto out_release;
 553                 }
 554
 555                 goto out_unlock;
 556         }
 557
 558         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 559         if (ret)
 560                 goto out_release;
 561
 562         /*
 563          * Update power state on the new interface. Admittedly, based on
 564          * mac80211 logics this power update will disable power management
 565          */
 566         iwl_mvm_power_update_mode(mvm, vif);
 567
 568         /* beacon filtering */
 569         if (!mvm->bf_allowed_vif &&
 570             vif->type == NL80211_IFTYPE_STATION && !vif->p2p){
 571                 mvm->bf_allowed_vif = mvmvif;
 572                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
 573         }
 574
 575         ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 576         if (ret)
 577                 goto out_release;
 578
 579         /*
 580          * P2P_DEVICE interface does not have a channel context assigned to it,
 581          * so a dedicated PHY context is allocated to it and the corresponding
 582          * MAC context is bound to it at this stage.
 583          */
 584         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 585
 586                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 587                 if (!mvmvif->phy_ctxt) {
 588                         ret = -ENOSPC;
 589                         goto out_remove_mac;
 590                 }
 591
 592                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 593                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 594                 if (ret)
 595                         goto out_unref_phy;
 596
 597                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 598                 if (ret)
 599                         goto out_unbind;
 600
 601                 /* Save a pointer to p2p device vif, so it can later be used to
 602                  * update the p2p device MAC when a GO is started/stopped */
 603                 mvm->p2p_device_vif = vif;
 604         }
 605
 606         iwl_mvm_vif_dbgfs_register(mvm, vif);
 607         goto out_unlock;
 608
 609  out_unbind:
 610         iwl_mvm_binding_remove_vif(mvm, vif);
 611  out_unref_phy:
 612         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 613  out_remove_mac:
 614         mvmvif->phy_ctxt = NULL;
 615         iwl_mvm_mac_ctxt_remove(mvm, vif);
 616  out_release:
 617         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 618                 mvm->vif_count--;
 619         ieee80211_iterate_active_interfaces(
 620                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 621                 iwl_mvm_power_update_iterator, mvm);
 622         iwl_mvm_mac_ctxt_release(mvm, vif);
 623  out_unlock:
 624         mutex_unlock(&mvm->mutex);
 625
 626         return ret;
 627 }
 628
 629 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 630                                         struct ieee80211_vif *vif)
 631 {
 632         u32 tfd_msk = 0, ac;
 633
 634         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 635                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 636                         tfd_msk |= BIT(vif->hw_queue[ac]);
 637
 638         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 639                 tfd_msk |= BIT(vif->cab_queue);
 640
 641         if (tfd_msk) {
 642                 mutex_lock(&mvm->mutex);
 643                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 644                 mutex_unlock(&mvm->mutex);
 645         }
 646
 647         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 648                 /*
 649                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 650                  * We assume here that all the packets sent to the OFFCHANNEL
 651                  * queue are sent in ROC session.
 652                  */
 653                 flush_work(&mvm->roc_done_wk);
 654         } else {
 655                 /*
 656                  * By now, all the AC queues are empty. The AGG queues are
 657                  * empty too. We already got all the Tx responses for all the
 658                  * packets in the queues. The drain work can have been
 659                  * triggered. Flush it.
 660                  */
 661                 flush_work(&mvm->sta_drained_wk);
 662         }
 663 }
 664
 665 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 666                                          struct ieee80211_vif *vif)
 667 {
 668         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 669         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 670
 671         iwl_mvm_prepare_mac_removal(mvm, vif);
 672
 673         mutex_lock(&mvm->mutex);
 674
 675         if (mvm->bf_allowed_vif == mvmvif) {
 676                 mvm->bf_allowed_vif = NULL;
 677                 vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
 678         }
 679
 680         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 681
 682         /*
 683          * For AP/GO interface, the tear down of the resources allocated to the
 684          * interface is be handled as part of the stop_ap flow.
 685          */
 686         if (vif->type == NL80211_IFTYPE_AP) {
 687                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 688                 goto out_release;
 689         }
 690
 691         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 692                 mvm->p2p_device_vif = NULL;
 693                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 694                 iwl_mvm_binding_remove_vif(mvm, vif);
 695                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 696                 mvmvif->phy_ctxt = NULL;
 697         }
 698
 699         /*
 700          * TODO: remove this temporary code.
 701          * Currently MVM FW supports power management only on single MAC.
 702          * Check if only one additional interface remains after removing
 703          * current one. Update power mode on the remaining interface.
 704          */
 705         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 706                 mvm->vif_count--;
 707         IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 708                            mvm->vif_count);
 709         if (mvm->vif_count == 1) {
 710                 ieee80211_iterate_active_interfaces(
 711                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 712                                         iwl_mvm_power_update_iterator, mvm);
 713         }
 714
 715         iwl_mvm_mac_ctxt_remove(mvm, vif);
 716
 717 out_release:
 718         iwl_mvm_mac_ctxt_release(mvm, vif);
 719         mutex_unlock(&mvm->mutex);
 720 }
 721
 722 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 723 {
 724         return 0;
 725 }
 726
 727 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
 728                                      unsigned int changed_flags,
 729                                      unsigned int *total_flags,
 730                                      u64 multicast)
 731 {
 732         *total_flags = 0;
 733 }
 734
 735 static int iwl_mvm_configure_mcast_filter(struct iwl_mvm *mvm,
 736                                           struct ieee80211_vif *vif)
 737 {
 738         struct iwl_mcast_filter_cmd mcast_filter_cmd = {
 739                 .pass_all = 1,
 740         };
 741
 742         memcpy(mcast_filter_cmd.bssid, vif->bss_conf.bssid, ETH_ALEN);
 743
 744         return iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC,
 745                                     sizeof(mcast_filter_cmd),
 746                                     &mcast_filter_cmd);
 747 }
 748
 749 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 750                                              struct ieee80211_vif *vif,
 751                                              struct ieee80211_bss_conf *bss_conf,
 752                                              u32 changes)
 753 {
 754         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 755         int ret;
 756
 757         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 758         if (ret)
 759                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
 760
 761         if (changes & BSS_CHANGED_ASSOC) {
 762                 if (bss_conf->assoc) {
 763                         /* add quota for this interface */
 764                         ret = iwl_mvm_update_quotas(mvm, vif);
 765                         if (ret) {
 766                                 IWL_ERR(mvm, "failed to update quotas\n");
 767                                 return;
 768                         }
 769                         iwl_mvm_bt_coex_vif_assoc(mvm, vif);
 770                         iwl_mvm_configure_mcast_filter(mvm, vif);
 771                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
 772                         /* remove AP station now that the MAC is unassoc */
 773                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
 774                         if (ret)
 775                                 IWL_ERR(mvm, "failed to remove AP station\n");
 776                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 777                         /* remove quota for this interface */
 778                         ret = iwl_mvm_update_quotas(mvm, NULL);
 779                         if (ret)
 780                                 IWL_ERR(mvm, "failed to update quotas\n");
 781                 }
 782                 ret = iwl_mvm_power_update_mode(mvm, vif);
 783                 if (ret)
 784                         IWL_ERR(mvm, "failed to update power mode\n");
 785         } else if (changes & BSS_CHANGED_BEACON_INFO) {
 786                 /*
 787                  * We received a beacon _after_ association so
 788                  * remove the session protection.
 789                  */
 790                 iwl_mvm_remove_time_event(mvm, mvmvif,
 791                                           &mvmvif->time_event_data);
 792         } else if (changes & BSS_CHANGED_PS) {
 793                 ret = iwl_mvm_power_update_mode(mvm, vif);
 794                 if (ret)
 795                         IWL_ERR(mvm, "failed to update power mode\n");
 796         }
 797 }
 798
 799 static int iwl_mvm_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 800 {
 801         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 802         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 803         int ret;
 804
 805         mutex_lock(&mvm->mutex);
 806
 807         /* Send the beacon template */
 808         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
 809         if (ret)
 810                 goto out_unlock;
 811
 812         /* Add the mac context */
 813         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 814         if (ret)
 815                 goto out_unlock;
 816
 817         /* Perform the binding */
 818         ret = iwl_mvm_binding_add_vif(mvm, vif);
 819         if (ret)
 820                 goto out_remove;
 821
 822         mvmvif->ap_active = true;
 823
 824         /* Send the bcast station. At this stage the TBTT and DTIM time events
 825          * are added and applied to the scheduler */
 826         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 827         if (ret)
 828                 goto out_unbind;
 829
 830         ret = iwl_mvm_update_quotas(mvm, vif);
 831         if (ret)
 832                 goto out_rm_bcast;
 833
 834         /* Need to update the P2P Device MAC */
 835         if (vif->p2p && mvm->p2p_device_vif)
 836                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 837
 838         mutex_unlock(&mvm->mutex);
 839         return 0;
 840
 841 out_rm_bcast:
 842         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 843 out_unbind:
 844         iwl_mvm_binding_remove_vif(mvm, vif);
 845 out_remove:
 846         iwl_mvm_mac_ctxt_remove(mvm, vif);
 847 out_unlock:
 848         mutex_unlock(&mvm->mutex);
 849         return ret;
 850 }
 851
 852 static void iwl_mvm_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 853 {
 854         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 855         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 856
 857         iwl_mvm_prepare_mac_removal(mvm, vif);
 858
 859         mutex_lock(&mvm->mutex);
 860
 861         mvmvif->ap_active = false;
 862
 863         /* Need to update the P2P Device MAC */
 864         if (vif->p2p && mvm->p2p_device_vif)
 865                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 866
 867         iwl_mvm_update_quotas(mvm, NULL);
 868         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 869         iwl_mvm_binding_remove_vif(mvm, vif);
 870         iwl_mvm_mac_ctxt_remove(mvm, vif);
 871
 872         mutex_unlock(&mvm->mutex);
 873 }
 874
 875 static void iwl_mvm_bss_info_changed_ap(struct iwl_mvm *mvm,
 876                                         struct ieee80211_vif *vif,
 877                                         struct ieee80211_bss_conf *bss_conf,
 878                                         u32 changes)
 879 {
 880         /* Need to send a new beacon template to the FW */
 881         if (changes & BSS_CHANGED_BEACON) {
 882                 if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
 883                         IWL_WARN(mvm, "Failed updating beacon data\n");
 884         }
 885 }
 886
 887 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
 888                                      struct ieee80211_vif *vif,
 889                                      struct ieee80211_bss_conf *bss_conf,
 890                                      u32 changes)
 891 {
 892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 893
 894         mutex_lock(&mvm->mutex);
 895
 896         switch (vif->type) {
 897         case NL80211_IFTYPE_STATION:
 898                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
 899                 break;
 900         case NL80211_IFTYPE_AP:
 901                 iwl_mvm_bss_info_changed_ap(mvm, vif, bss_conf, changes);
 902                 break;
 903         default:
 904                 /* shouldn't happen */
 905                 WARN_ON_ONCE(1);
 906         }
 907
 908         mutex_unlock(&mvm->mutex);
 909 }
 910
 911 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
 912                                struct ieee80211_vif *vif,
 913                                struct cfg80211_scan_request *req)
 914 {
 915         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 916         int ret;
 917
 918         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
 919                 return -EINVAL;
 920
 921         mutex_lock(&mvm->mutex);
 922
 923         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
 924                 ret = iwl_mvm_scan_request(mvm, vif, req);
 925         else
 926                 ret = -EBUSY;
 927
 928         mutex_unlock(&mvm->mutex);
 929
 930         return ret;
 931 }
 932
 933 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
 934                                        struct ieee80211_vif *vif)
 935 {
 936         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 937
 938         mutex_lock(&mvm->mutex);
 939
 940         iwl_mvm_cancel_scan(mvm);
 941
 942         mutex_unlock(&mvm->mutex);
 943 }
 944
 945 static void
 946 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
 947                                   struct ieee80211_sta *sta, u16 tid,
 948                                   int num_frames,
 949                                   enum ieee80211_frame_release_type reason,
 950                                   bool more_data)
 951 {
 952         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 953
 954         /* TODO: how do we tell the fw to send frames for a specific TID */
 955
 956         /*
 957          * The fw will send EOSP notification when the last frame will be
 958          * transmitted.
 959          */
 960         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
 961 }
 962
 963 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
 964                                    struct ieee80211_vif *vif,
 965                                    enum sta_notify_cmd cmd,
 966                                    struct ieee80211_sta *sta)
 967 {
 968         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 969         struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
 970
 971         switch (cmd) {
 972         case STA_NOTIFY_SLEEP:
 973                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
 974                         ieee80211_sta_block_awake(hw, sta, true);
 975                 /*
 976                  * The fw updates the STA to be asleep. Tx packets on the Tx
 977                  * queues to this station will not be transmitted. The fw will
 978                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
 979                  */
 980                 break;
 981         case STA_NOTIFY_AWAKE:
 982                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
 983                         break;
 984                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
 985                 break;
 986         default:
 987                 break;
 988         }
 989 }
 990
 991 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
 992                                  struct ieee80211_vif *vif,
 993                                  struct ieee80211_sta *sta,
 994                                  enum ieee80211_sta_state old_state,
 995                                  enum ieee80211_sta_state new_state)
 996 {
 997         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 998         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 999         int ret;
1000
1001         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1002                            sta->addr, old_state, new_state);
1003
1004         /* this would be a mac80211 bug ... but don't crash */
1005         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1006                 return -EINVAL;
1007
1008         /* if a STA is being removed, reuse its ID */
1009         flush_work(&mvm->sta_drained_wk);
1010
1011         mutex_lock(&mvm->mutex);
1012         if (old_state == IEEE80211_STA_NOTEXIST &&
1013             new_state == IEEE80211_STA_NONE) {
1014                 /*
1015                  * Firmware bug - it'll crash if the beacon interval is less
1016                  * than 16. We can't avoid connecting at all, so refuse the
1017                  * station state change, this will cause mac80211 to abandon
1018                  * attempts to connect to this AP, and eventually wpa_s will
1019                  * blacklist the AP...
1020                  */
1021                 if (vif->type == NL80211_IFTYPE_STATION &&
1022                     vif->bss_conf.beacon_int < 16) {
1023                         IWL_ERR(mvm,
1024                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1025                                 sta->addr, vif->bss_conf.beacon_int);
1026                         ret = -EINVAL;
1027                         goto out_unlock;
1028                 }
1029                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1030         } else if (old_state == IEEE80211_STA_NONE &&
1031                    new_state == IEEE80211_STA_AUTH) {
1032                 ret = 0;
1033         } else if (old_state == IEEE80211_STA_AUTH &&
1034                    new_state == IEEE80211_STA_ASSOC) {
1035                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1036                 if (ret == 0)
1037                         iwl_mvm_rs_rate_init(mvm, sta,
1038                                              mvmvif->phy_ctxt->channel->band);
1039         } else if (old_state == IEEE80211_STA_ASSOC &&
1040                    new_state == IEEE80211_STA_AUTHORIZED) {
1041                 /* enable beacon filtering */
1042                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif));
1043                 ret = 0;
1044         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1045                    new_state == IEEE80211_STA_ASSOC) {
1046                 /* disable beacon filtering */
1047                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif));
1048                 ret = 0;
1049         } else if (old_state == IEEE80211_STA_ASSOC &&
1050                    new_state == IEEE80211_STA_AUTH) {
1051                 ret = 0;
1052         } else if (old_state == IEEE80211_STA_AUTH &&
1053                    new_state == IEEE80211_STA_NONE) {
1054                 ret = 0;
1055         } else if (old_state == IEEE80211_STA_NONE &&
1056                    new_state == IEEE80211_STA_NOTEXIST) {
1057                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1058         } else {
1059                 ret = -EIO;
1060         }
1061  out_unlock:
1062         mutex_unlock(&mvm->mutex);
1063
1064         return ret;
1065 }
1066
1067 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1068 {
1069         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1070
1071         mvm->rts_threshold = value;
1072
1073         return 0;
1074 }
1075
1076 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1077                                struct ieee80211_vif *vif, u16 ac,
1078                                const struct ieee80211_tx_queue_params *params)
1079 {
1080         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1081         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1082
1083         mvmvif->queue_params[ac] = *params;
1084
1085         /*
1086          * No need to update right away, we'll get BSS_CHANGED_QOS
1087          * The exception is P2P_DEVICE interface which needs immediate update.
1088          */
1089         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1090                 int ret;
1091
1092                 mutex_lock(&mvm->mutex);
1093                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1094                 mutex_unlock(&mvm->mutex);
1095                 return ret;
1096         }
1097         return 0;
1098 }
1099
1100 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1101                                       struct ieee80211_vif *vif)
1102 {
1103         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1104         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1105                            200 + vif->bss_conf.beacon_int);
1106         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1107                                100 + vif->bss_conf.beacon_int);
1108
1109         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1110                 return;
1111
1112         mutex_lock(&mvm->mutex);
1113         /* Try really hard to protect the session and hear a beacon */
1114         iwl_mvm_protect_session(mvm, vif, duration, min_duration);
1115         mutex_unlock(&mvm->mutex);
1116 }
1117
1118 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1119                                enum set_key_cmd cmd,
1120                                struct ieee80211_vif *vif,
1121                                struct ieee80211_sta *sta,
1122                                struct ieee80211_key_conf *key)
1123 {
1124         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1125         int ret;
1126
1127         if (iwlwifi_mod_params.sw_crypto) {
1128                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1129                 return -EOPNOTSUPP;
1130         }
1131
1132         switch (key->cipher) {
1133         case WLAN_CIPHER_SUITE_TKIP:
1134                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1135                 /* fall-through */
1136         case WLAN_CIPHER_SUITE_CCMP:
1137                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1138                 break;
1139         case WLAN_CIPHER_SUITE_AES_CMAC:
1140                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1141                 break;
1142         case WLAN_CIPHER_SUITE_WEP40:
1143         case WLAN_CIPHER_SUITE_WEP104:
1144                 /*
1145                  * Support for TX only, at least for now, so accept
1146                  * the key and do nothing else. Then mac80211 will
1147                  * pass it for TX but we don't have to use it for RX.
1148                  */
1149                 return 0;
1150         default:
1151                 return -EOPNOTSUPP;
1152         }
1153
1154         mutex_lock(&mvm->mutex);
1155
1156         switch (cmd) {
1157         case SET_KEY:
1158                 if (vif->type == NL80211_IFTYPE_AP && !sta) {
1159                         /* GTK on AP interface is a TX-only key, return 0 */
1160                         ret = 0;
1161                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1162                         break;
1163                 }
1164
1165                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1166                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1167                 if (ret) {
1168                         IWL_WARN(mvm, "set key failed\n");
1169                         /*
1170                          * can't add key for RX, but we don't need it
1171                          * in the device for TX so still return 0
1172                          */
1173                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1174                         ret = 0;
1175                 }
1176
1177                 break;
1178         case DISABLE_KEY:
1179                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1180                         ret = 0;
1181                         break;
1182                 }
1183
1184                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1185                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1186                 break;
1187         default:
1188                 ret = -EINVAL;
1189         }
1190
1191         mutex_unlock(&mvm->mutex);
1192         return ret;
1193 }
1194
1195 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1196                                         struct ieee80211_vif *vif,
1197                                         struct ieee80211_key_conf *keyconf,
1198                                         struct ieee80211_sta *sta,
1199                                         u32 iv32, u16 *phase1key)
1200 {
1201         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1202
1203         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
1204 }
1205
1206
1207 static int iwl_mvm_roc(struct ieee80211_hw *hw,
1208                        struct ieee80211_vif *vif,
1209                        struct ieee80211_channel *channel,
1210                        int duration,
1211                        enum ieee80211_roc_type type)
1212 {
1213         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1214         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1215         struct cfg80211_chan_def chandef;
1216         struct iwl_mvm_phy_ctxt *phy_ctxt;
1217         int ret, i;
1218
1219         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
1220                            duration, type);
1221
1222         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
1223                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
1224                 return -EINVAL;
1225         }
1226
1227         mutex_lock(&mvm->mutex);
1228
1229         for (i = 0; i < NUM_PHY_CTX; i++) {
1230                 phy_ctxt = &mvm->phy_ctxts[i];
1231                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
1232                         continue;
1233
1234                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
1235                         /*
1236                          * Unbind the P2P_DEVICE from the current PHY context,
1237                          * and if the PHY context is not used remove it.
1238                          */
1239                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
1240                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1241                                 goto out_unlock;
1242
1243                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1244
1245                         /* Bind the P2P_DEVICE to the current PHY Context */
1246                         mvmvif->phy_ctxt = phy_ctxt;
1247
1248                         ret = iwl_mvm_binding_add_vif(mvm, vif);
1249                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1250                                 goto out_unlock;
1251
1252                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1253                         goto schedule_time_event;
1254                 }
1255         }
1256
1257         /* Need to update the PHY context only if the ROC channel changed */
1258         if (channel == mvmvif->phy_ctxt->channel)
1259                 goto schedule_time_event;
1260
1261         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
1262
1263         /*
1264          * Change the PHY context configuration as it is currently referenced
1265          * only by the P2P Device MAC
1266          */
1267         if (mvmvif->phy_ctxt->ref == 1) {
1268                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
1269                                                &chandef, 1, 1);
1270                 if (ret)
1271                         goto out_unlock;
1272         } else {
1273                 /*
1274                  * The PHY context is shared with other MACs. Need to remove the
1275                  * P2P Device from the binding, allocate an new PHY context and
1276                  * create a new binding
1277                  */
1278                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1279                 if (!phy_ctxt) {
1280                         ret = -ENOSPC;
1281                         goto out_unlock;
1282                 }
1283
1284                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
1285                                                1, 1);
1286                 if (ret) {
1287                         IWL_ERR(mvm, "Failed to change PHY context\n");
1288                         goto out_unlock;
1289                 }
1290
1291                 /* Unbind the P2P_DEVICE from the current PHY context */
1292                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
1293                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1294                         goto out_unlock;
1295
1296                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1297
1298                 /* Bind the P2P_DEVICE to the new allocated PHY context */
1299                 mvmvif->phy_ctxt = phy_ctxt;
1300
1301                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1302                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1303                         goto out_unlock;
1304
1305                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1306         }
1307
1308 schedule_time_event:
1309         /* Schedule the time events */
1310         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
1311
1312 out_unlock:
1313         mutex_unlock(&mvm->mutex);
1314         IWL_DEBUG_MAC80211(mvm, "leave\n");
1315         return ret;
1316 }
1317
1318 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
1319 {
1320         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1321
1322         IWL_DEBUG_MAC80211(mvm, "enter\n");
1323
1324         mutex_lock(&mvm->mutex);
1325         iwl_mvm_stop_p2p_roc(mvm);
1326         mutex_unlock(&mvm->mutex);
1327
1328         IWL_DEBUG_MAC80211(mvm, "leave\n");
1329         return 0;
1330 }
1331
1332 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
1333                                struct ieee80211_chanctx_conf *ctx)
1334 {
1335         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1336         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1337         struct iwl_mvm_phy_ctxt *phy_ctxt;
1338         int ret;
1339
1340         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
1341
1342         mutex_lock(&mvm->mutex);
1343         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1344         if (!phy_ctxt) {
1345                 ret = -ENOSPC;
1346                 goto out;
1347         }
1348
1349         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
1350                                        ctx->rx_chains_static,
1351                                        ctx->rx_chains_dynamic);
1352         if (ret) {
1353                 IWL_ERR(mvm, "Failed to add PHY context\n");
1354                 goto out;
1355         }
1356
1357         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
1358         *phy_ctxt_id = phy_ctxt->id;
1359 out:
1360         mutex_unlock(&mvm->mutex);
1361         return ret;
1362 }
1363
1364 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
1365                                    struct ieee80211_chanctx_conf *ctx)
1366 {
1367         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1368         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1369         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1370
1371         mutex_lock(&mvm->mutex);
1372         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
1373         mutex_unlock(&mvm->mutex);
1374 }
1375
1376 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
1377                                    struct ieee80211_chanctx_conf *ctx,
1378                                    u32 changed)
1379 {
1380         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1381         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1382         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1383
1384         if (WARN_ONCE((phy_ctxt->ref > 1) &&
1385                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
1386                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
1387                                    IEEE80211_CHANCTX_CHANGE_RADAR)),
1388                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
1389                       phy_ctxt->ref, changed))
1390                 return;
1391
1392         mutex_lock(&mvm->mutex);
1393         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
1394                                  ctx->rx_chains_static,
1395                                  ctx->rx_chains_dynamic);
1396         mutex_unlock(&mvm->mutex);
1397 }
1398
1399 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
1400                                       struct ieee80211_vif *vif,
1401                                       struct ieee80211_chanctx_conf *ctx)
1402 {
1403         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1404         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1405         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1406         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1407         int ret;
1408
1409         mutex_lock(&mvm->mutex);
1410
1411         mvmvif->phy_ctxt = phy_ctxt;
1412
1413         switch (vif->type) {
1414         case NL80211_IFTYPE_AP:
1415                 /*
1416                  * The AP binding flow is handled as part of the start_ap flow
1417                  * (in bss_info_changed).
1418                  */
1419                 ret = 0;
1420                 goto out_unlock;
1421         case NL80211_IFTYPE_STATION:
1422         case NL80211_IFTYPE_ADHOC:
1423         case NL80211_IFTYPE_MONITOR:
1424                 break;
1425         default:
1426                 ret = -EINVAL;
1427                 goto out_unlock;
1428         }
1429
1430         ret = iwl_mvm_binding_add_vif(mvm, vif);
1431         if (ret)
1432                 goto out_unlock;
1433
1434         /*
1435          * Setting the quota at this stage is only required for monitor
1436          * interfaces. For the other types, the bss_info changed flow
1437          * will handle quota settings.
1438          */
1439         if (vif->type == NL80211_IFTYPE_MONITOR) {
1440                 mvmvif->monitor_active = true;
1441                 ret = iwl_mvm_update_quotas(mvm, vif);
1442                 if (ret)
1443                         goto out_remove_binding;
1444         }
1445
1446         goto out_unlock;
1447
1448  out_remove_binding:
1449         iwl_mvm_binding_remove_vif(mvm, vif);
1450  out_unlock:
1451         mutex_unlock(&mvm->mutex);
1452         if (ret)
1453                 mvmvif->phy_ctxt = NULL;
1454         return ret;
1455 }
1456
1457 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
1458                                          struct ieee80211_vif *vif,
1459                                          struct ieee80211_chanctx_conf *ctx)
1460 {
1461         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1462         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1463
1464         mutex_lock(&mvm->mutex);
1465
1466         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
1467
1468         if (vif->type == NL80211_IFTYPE_AP)
1469                 goto out_unlock;
1470
1471         switch (vif->type) {
1472         case NL80211_IFTYPE_MONITOR:
1473                 mvmvif->monitor_active = false;
1474                 iwl_mvm_update_quotas(mvm, NULL);
1475                 break;
1476         default:
1477                 break;
1478         }
1479
1480         iwl_mvm_binding_remove_vif(mvm, vif);
1481 out_unlock:
1482         mvmvif->phy_ctxt = NULL;
1483         mutex_unlock(&mvm->mutex);
1484 }
1485
1486 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
1487                            struct ieee80211_sta *sta,
1488                            bool set)
1489 {
1490         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1491         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1492
1493         if (!mvm_sta || !mvm_sta->vif) {
1494                 IWL_ERR(mvm, "Station is not associated to a vif\n");
1495                 return -EINVAL;
1496         }
1497
1498         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
1499 }
1500
1501 static void iwl_mvm_mac_rssi_callback(struct ieee80211_hw *hw,
1502                                       struct ieee80211_vif *vif,
1503                                       enum ieee80211_rssi_event rssi_event)
1504 {
1505         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1506
1507         iwl_mvm_bt_rssi_event(mvm, vif, rssi_event);
1508 }
1509
1510 struct ieee80211_ops iwl_mvm_hw_ops = {
1511         .tx = iwl_mvm_mac_tx,
1512         .ampdu_action = iwl_mvm_mac_ampdu_action,
1513         .start = iwl_mvm_mac_start,
1514         .restart_complete = iwl_mvm_mac_restart_complete,
1515         .stop = iwl_mvm_mac_stop,
1516         .add_interface = iwl_mvm_mac_add_interface,
1517         .remove_interface = iwl_mvm_mac_remove_interface,
1518         .config = iwl_mvm_mac_config,
1519         .configure_filter = iwl_mvm_configure_filter,
1520         .bss_info_changed = iwl_mvm_bss_info_changed,
1521         .hw_scan = iwl_mvm_mac_hw_scan,
1522         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
1523         .sta_state = iwl_mvm_mac_sta_state,
1524         .sta_notify = iwl_mvm_mac_sta_notify,
1525         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
1526         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
1527         .conf_tx = iwl_mvm_mac_conf_tx,
1528         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
1529         .set_key = iwl_mvm_mac_set_key,
1530         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
1531         .remain_on_channel = iwl_mvm_roc,
1532         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
1533         .rssi_callback = iwl_mvm_mac_rssi_callback,
1534
1535         .add_chanctx = iwl_mvm_add_chanctx,
1536         .remove_chanctx = iwl_mvm_remove_chanctx,
1537         .change_chanctx = iwl_mvm_change_chanctx,
1538         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
1539         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
1540
1541         .start_ap = iwl_mvm_start_ap,
1542         .stop_ap = iwl_mvm_stop_ap,
1543
1544         .set_tim = iwl_mvm_set_tim,
1545
1546 #ifdef CONFIG_PM_SLEEP
1547         /* look at d3.c */
1548         .suspend = iwl_mvm_suspend,
1549         .resume = iwl_mvm_resume,
1550         .set_wakeup = iwl_mvm_set_wakeup,
1551         .set_rekey_data = iwl_mvm_set_rekey_data,
1552 #if IS_ENABLED(CONFIG_IPV6)
1553         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
1554 #endif
1555         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
1556 #endif
1557 };