Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/mvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 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                         BIT(NL80211_IFTYPE_AP),
  86         },
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT) |
  90                         BIT(NL80211_IFTYPE_P2P_GO),
  91         },
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
  95         },
  96 };
  97
  98 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
  99         {
 100                 .num_different_channels = 1,
 101                 .max_interfaces = 3,
 102                 .limits = iwl_mvm_limits,
 103                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 104         },
 105 };
 106
 107 #ifdef CONFIG_PM_SLEEP
 108 static const struct nl80211_wowlan_tcp_data_token_feature
 109 iwl_mvm_wowlan_tcp_token_feature = {
 110         .min_len = 0,
 111         .max_len = 255,
 112         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 113 };
 114
 115 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 116         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 117         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 118                             sizeof(struct ethhdr) -
 119                             sizeof(struct iphdr) -
 120                             sizeof(struct tcphdr),
 121         .data_interval_max = 65535, /* __le16 in API */
 122         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .seq = true,
 127 };
 128 #endif
 129
 130 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         return ieee80211_register_hw(mvm->hw);
 261 }
 262
 263 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 264                            struct ieee80211_tx_control *control,
 265                            struct sk_buff *skb)
 266 {
 267         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 268
 269         if (iwl_mvm_is_radio_killed(mvm)) {
 270                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 271                 goto drop;
 272         }
 273
 274         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 275             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 276                 goto drop;
 277
 278         if (control->sta) {
 279                 if (iwl_mvm_tx_skb(mvm, skb, control->sta))
 280                         goto drop;
 281                 return;
 282         }
 283
 284         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 285                 goto drop;
 286         return;
 287  drop:
 288         ieee80211_free_txskb(hw, skb);
 289 }
 290
 291 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 292                                     struct ieee80211_vif *vif,
 293                                     enum ieee80211_ampdu_mlme_action action,
 294                                     struct ieee80211_sta *sta, u16 tid,
 295                                     u16 *ssn, u8 buf_size)
 296 {
 297         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 298         int ret;
 299
 300         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 301                      sta->addr, tid, action);
 302
 303         if (!(mvm->nvm_data->sku_cap_11n_enable))
 304                 return -EACCES;
 305
 306         mutex_lock(&mvm->mutex);
 307
 308         switch (action) {
 309         case IEEE80211_AMPDU_RX_START:
 310                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) {
 311                         ret = -EINVAL;
 312                         break;
 313                 }
 314                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 315                 break;
 316         case IEEE80211_AMPDU_RX_STOP:
 317                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 318                 break;
 319         case IEEE80211_AMPDU_TX_START:
 320                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) {
 321                         ret = -EINVAL;
 322                         break;
 323                 }
 324                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 325                 break;
 326         case IEEE80211_AMPDU_TX_STOP_CONT:
 327                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 328                 break;
 329         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 330         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 331                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 332                 break;
 333         case IEEE80211_AMPDU_TX_OPERATIONAL:
 334                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 335                 break;
 336         default:
 337                 WARN_ON_ONCE(1);
 338                 ret = -EINVAL;
 339                 break;
 340         }
 341         mutex_unlock(&mvm->mutex);
 342
 343         return ret;
 344 }
 345
 346 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 347                                      struct ieee80211_vif *vif)
 348 {
 349         struct iwl_mvm *mvm = data;
 350         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 351
 352         mvmvif->uploaded = false;
 353         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 354
 355         /* does this make sense at all? */
 356         mvmvif->color++;
 357
 358         spin_lock_bh(&mvm->time_event_lock);
 359         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 360         spin_unlock_bh(&mvm->time_event_lock);
 361
 362         mvmvif->phy_ctxt = NULL;
 363 }
 364
 365 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 366 {
 367         iwl_trans_stop_device(mvm->trans);
 368         iwl_trans_stop_hw(mvm->trans, false);
 369
 370         mvm->scan_status = IWL_MVM_SCAN_NONE;
 371
 372         /* just in case one was running */
 373         ieee80211_remain_on_channel_expired(mvm->hw);
 374
 375         ieee80211_iterate_active_interfaces_atomic(
 376                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 377                 iwl_mvm_cleanup_iterator, mvm);
 378
 379         mvm->p2p_device_vif = NULL;
 380
 381         iwl_mvm_reset_phy_ctxts(mvm);
 382         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 383         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 384
 385         ieee80211_wake_queues(mvm->hw);
 386
 387         mvm->vif_count = 0;
 388 }
 389
 390 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 391 {
 392         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 393         int ret;
 394
 395         mutex_lock(&mvm->mutex);
 396
 397         /* Clean up some internal and mac80211 state on restart */
 398         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 399                 iwl_mvm_restart_cleanup(mvm);
 400
 401         ret = iwl_mvm_up(mvm);
 402         mutex_unlock(&mvm->mutex);
 403
 404         return ret;
 405 }
 406
 407 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 408 {
 409         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 410         int ret;
 411
 412         mutex_lock(&mvm->mutex);
 413
 414         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 415         ret = iwl_mvm_update_quotas(mvm, NULL);
 416         if (ret)
 417                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 418                         ret);
 419
 420         mutex_unlock(&mvm->mutex);
 421 }
 422
 423 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 424 {
 425         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 426
 427         flush_work(&mvm->async_handlers_wk);
 428
 429         mutex_lock(&mvm->mutex);
 430         /* async_handlers_wk is now blocked */
 431
 432         /*
 433          * The work item could be running or queued if the
 434          * ROC time event stops just as we get here.
 435          */
 436         cancel_work_sync(&mvm->roc_done_wk);
 437
 438         iwl_trans_stop_device(mvm->trans);
 439         iwl_trans_stop_hw(mvm->trans, false);
 440
 441         iwl_mvm_async_handlers_purge(mvm);
 442         /* async_handlers_list is empty and will stay empty: HW is stopped */
 443
 444         /* the fw is stopped, the aux sta is dead: clean up driver state */
 445         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 446
 447         mutex_unlock(&mvm->mutex);
 448
 449         /*
 450          * The worker might have been waiting for the mutex, let it run and
 451          * discover that its list is now empty.
 452          */
 453         cancel_work_sync(&mvm->async_handlers_wk);
 454 }
 455
 456 static void iwl_mvm_pm_disable_iterator(void *data, u8 *mac,
 457                                         struct ieee80211_vif *vif)
 458 {
 459         struct iwl_mvm *mvm = data;
 460         int ret;
 461
 462         ret = iwl_mvm_power_disable(mvm, vif);
 463         if (ret)
 464                 IWL_ERR(mvm, "failed to disable power management\n");
 465 }
 466
 467 static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
 468                                           struct ieee80211_vif *vif)
 469 {
 470         struct iwl_mvm *mvm = data;
 471
 472         iwl_mvm_power_update_mode(mvm, vif);
 473 }
 474
 475 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 476 {
 477         u16 i;
 478
 479         lockdep_assert_held(&mvm->mutex);
 480
 481         for (i = 0; i < NUM_PHY_CTX; i++)
 482                 if (!mvm->phy_ctxts[i].ref)
 483                         return &mvm->phy_ctxts[i];
 484
 485         IWL_ERR(mvm, "No available PHY context\n");
 486         return NULL;
 487 }
 488
 489 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 490                                      struct ieee80211_vif *vif)
 491 {
 492         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 494         int ret;
 495
 496         /*
 497          * Not much to do here. The stack will not allow interface
 498          * types or combinations that we didn't advertise, so we
 499          * don't really have to check the types.
 500          */
 501
 502         mutex_lock(&mvm->mutex);
 503
 504         /* Allocate resources for the MAC context, and add it the the fw  */
 505         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 506         if (ret)
 507                 goto out_unlock;
 508
 509         /*
 510          * The AP binding flow can be done only after the beacon
 511          * template is configured (which happens only in the mac80211
 512          * start_ap() flow), and adding the broadcast station can happen
 513          * only after the binding.
 514          * In addition, since modifying the MAC before adding a bcast
 515          * station is not allowed by the FW, delay the adding of MAC context to
 516          * the point where we can also add the bcast station.
 517          * In short: there's not much we can do at this point, other than
 518          * allocating resources :)
 519          */
 520         if (vif->type == NL80211_IFTYPE_AP) {
 521                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 522                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 523                                                qmask);
 524                 if (ret) {
 525                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 526                         goto out_release;
 527                 }
 528
 529                 goto out_unlock;
 530         }
 531
 532         /*
 533          * TODO: remove this temporary code.
 534          * Currently MVM FW supports power management only on single MAC.
 535          * If new interface added, disable PM on existing interface.
 536          * P2P device is a special case, since it is handled by FW similary to
 537          * scan. If P2P deviced is added, PM remains enabled on existing
 538          * interface.
 539          * Note: the method below does not count the new interface being added
 540          * at this moment.
 541          */
 542         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 543                 mvm->vif_count++;
 544         if (mvm->vif_count > 1) {
 545                 IWL_DEBUG_MAC80211(mvm,
 546                                    "Disable power on existing interfaces\n");
 547                 ieee80211_iterate_active_interfaces_atomic(
 548                                             mvm->hw,
 549                                             IEEE80211_IFACE_ITER_NORMAL,
 550                                             iwl_mvm_pm_disable_iterator, mvm);
 551         }
 552
 553         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 554         if (ret)
 555                 goto out_release;
 556
 557         /*
 558          * Update power state on the new interface. Admittedly, based on
 559          * mac80211 logics this power update will disable power management
 560          */
 561         iwl_mvm_power_update_mode(mvm, vif);
 562
 563         /* beacon filtering */
 564         if (!mvm->bf_allowed_vif &&
 565             vif->type == NL80211_IFTYPE_STATION && !vif->p2p){
 566                 mvm->bf_allowed_vif = mvmvif;
 567                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
 568         }
 569
 570         ret = iwl_mvm_disable_beacon_filter(mvm, vif);
 571         if (ret)
 572                 goto out_release;
 573
 574         /*
 575          * P2P_DEVICE interface does not have a channel context assigned to it,
 576          * so a dedicated PHY context is allocated to it and the corresponding
 577          * MAC context is bound to it at this stage.
 578          */
 579         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 580
 581                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 582                 if (!mvmvif->phy_ctxt) {
 583                         ret = -ENOSPC;
 584                         goto out_remove_mac;
 585                 }
 586
 587                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 588                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 589                 if (ret)
 590                         goto out_unref_phy;
 591
 592                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 593                 if (ret)
 594                         goto out_unbind;
 595
 596                 /* Save a pointer to p2p device vif, so it can later be used to
 597                  * update the p2p device MAC when a GO is started/stopped */
 598                 mvm->p2p_device_vif = vif;
 599         }
 600
 601         iwl_mvm_vif_dbgfs_register(mvm, vif);
 602         goto out_unlock;
 603
 604  out_unbind:
 605         iwl_mvm_binding_remove_vif(mvm, vif);
 606  out_unref_phy:
 607         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 608  out_remove_mac:
 609         mvmvif->phy_ctxt = NULL;
 610         iwl_mvm_mac_ctxt_remove(mvm, vif);
 611  out_release:
 612         /*
 613          * TODO: remove this temporary code.
 614          * Currently MVM FW supports power management only on single MAC.
 615          * Check if only one additional interface remains after releasing
 616          * current one. Update power mode on the remaining interface.
 617          */
 618         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 619                 mvm->vif_count--;
 620         IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 621                            mvm->vif_count);
 622         if (mvm->vif_count == 1) {
 623                 ieee80211_iterate_active_interfaces(
 624                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 625                                         iwl_mvm_power_update_iterator, mvm);
 626         }
 627         iwl_mvm_mac_ctxt_release(mvm, vif);
 628  out_unlock:
 629         mutex_unlock(&mvm->mutex);
 630
 631         return ret;
 632 }
 633
 634 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 635                                         struct ieee80211_vif *vif)
 636 {
 637         u32 tfd_msk = 0, ac;
 638
 639         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 640                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 641                         tfd_msk |= BIT(vif->hw_queue[ac]);
 642
 643         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 644                 tfd_msk |= BIT(vif->cab_queue);
 645
 646         if (tfd_msk) {
 647                 mutex_lock(&mvm->mutex);
 648                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 649                 mutex_unlock(&mvm->mutex);
 650         }
 651
 652         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 653                 /*
 654                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 655                  * We assume here that all the packets sent to the OFFCHANNEL
 656                  * queue are sent in ROC session.
 657                  */
 658                 flush_work(&mvm->roc_done_wk);
 659         } else {
 660                 /*
 661                  * By now, all the AC queues are empty. The AGG queues are
 662                  * empty too. We already got all the Tx responses for all the
 663                  * packets in the queues. The drain work can have been
 664                  * triggered. Flush it. This work item takes the mutex, so kill
 665                  * it before we take it.
 666                  */
 667                 flush_work(&mvm->sta_drained_wk);
 668         }
 669 }
 670
 671 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 672                                          struct ieee80211_vif *vif)
 673 {
 674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 675         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 676
 677         iwl_mvm_prepare_mac_removal(mvm, vif);
 678
 679         mutex_lock(&mvm->mutex);
 680
 681         if (mvm->bf_allowed_vif == mvmvif) {
 682                 mvm->bf_allowed_vif = NULL;
 683                 vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
 684         }
 685
 686         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 687
 688         /*
 689          * For AP/GO interface, the tear down of the resources allocated to the
 690          * interface is be handled as part of the stop_ap flow.
 691          */
 692         if (vif->type == NL80211_IFTYPE_AP) {
 693                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 694                 goto out_release;
 695         }
 696
 697         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 698                 mvm->p2p_device_vif = NULL;
 699                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 700                 iwl_mvm_binding_remove_vif(mvm, vif);
 701                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 702                 mvmvif->phy_ctxt = NULL;
 703         }
 704
 705         /*
 706          * TODO: remove this temporary code.
 707          * Currently MVM FW supports power management only on single MAC.
 708          * Check if only one additional interface remains after removing
 709          * current one. Update power mode on the remaining interface.
 710          */
 711         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 712                 mvm->vif_count--;
 713         IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 714                            mvm->vif_count);
 715         if (mvm->vif_count == 1) {
 716                 ieee80211_iterate_active_interfaces(
 717                                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 718                                         iwl_mvm_power_update_iterator, mvm);
 719         }
 720
 721         iwl_mvm_mac_ctxt_remove(mvm, vif);
 722
 723 out_release:
 724         iwl_mvm_mac_ctxt_release(mvm, vif);
 725         mutex_unlock(&mvm->mutex);
 726 }
 727
 728 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 729 {
 730         return 0;
 731 }
 732
 733 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
 734                                      unsigned int changed_flags,
 735                                      unsigned int *total_flags,
 736                                      u64 multicast)
 737 {
 738         *total_flags = 0;
 739 }
 740
 741 static int iwl_mvm_configure_mcast_filter(struct iwl_mvm *mvm,
 742                                           struct ieee80211_vif *vif)
 743 {
 744         struct iwl_mcast_filter_cmd mcast_filter_cmd = {
 745                 .pass_all = 1,
 746         };
 747
 748         memcpy(mcast_filter_cmd.bssid, vif->bss_conf.bssid, ETH_ALEN);
 749
 750         return iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC,
 751                                     sizeof(mcast_filter_cmd),
 752                                     &mcast_filter_cmd);
 753 }
 754
 755 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 756                                              struct ieee80211_vif *vif,
 757                                              struct ieee80211_bss_conf *bss_conf,
 758                                              u32 changes)
 759 {
 760         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 761         int ret;
 762
 763         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 764         if (ret)
 765                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
 766
 767         if (changes & BSS_CHANGED_ASSOC) {
 768                 if (bss_conf->assoc) {
 769                         /* add quota for this interface */
 770                         ret = iwl_mvm_update_quotas(mvm, vif);
 771                         if (ret) {
 772                                 IWL_ERR(mvm, "failed to update quotas\n");
 773                                 return;
 774                         }
 775                         iwl_mvm_bt_coex_vif_assoc(mvm, vif);
 776                         iwl_mvm_configure_mcast_filter(mvm, vif);
 777                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
 778                         /* remove AP station now that the MAC is unassoc */
 779                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
 780                         if (ret)
 781                                 IWL_ERR(mvm, "failed to remove AP station\n");
 782                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 783                         /* remove quota for this interface */
 784                         ret = iwl_mvm_update_quotas(mvm, NULL);
 785                         if (ret)
 786                                 IWL_ERR(mvm, "failed to update quotas\n");
 787                 }
 788         } else if (changes & BSS_CHANGED_DTIM_PERIOD) {
 789                 /*
 790                  * We received a beacon _after_ association so
 791                  * remove the session protection.
 792                  */
 793                 iwl_mvm_remove_time_event(mvm, mvmvif,
 794                                           &mvmvif->time_event_data);
 795         } else if (changes & BSS_CHANGED_PS) {
 796                 /*
 797                  * TODO: remove this temporary code.
 798                  * Currently MVM FW supports power management only on single
 799                  * MAC. Avoid power mode update if more than one interface
 800                  * is active.
 801                  */
 802                 IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
 803                                    mvm->vif_count);
 804                 if (mvm->vif_count == 1) {
 805                         ret = iwl_mvm_power_update_mode(mvm, vif);
 806                         if (ret)
 807                                 IWL_ERR(mvm, "failed to update power mode\n");
 808                 }
 809         }
 810 }
 811
 812 static int iwl_mvm_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 813 {
 814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 815         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 816         int ret;
 817
 818         mutex_lock(&mvm->mutex);
 819
 820         /* Send the beacon template */
 821         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
 822         if (ret)
 823                 goto out_unlock;
 824
 825         /* Add the mac context */
 826         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 827         if (ret)
 828                 goto out_unlock;
 829
 830         /* Perform the binding */
 831         ret = iwl_mvm_binding_add_vif(mvm, vif);
 832         if (ret)
 833                 goto out_remove;
 834
 835         mvmvif->ap_active = true;
 836
 837         /* Send the bcast station. At this stage the TBTT and DTIM time events
 838          * are added and applied to the scheduler */
 839         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 840         if (ret)
 841                 goto out_unbind;
 842
 843         ret = iwl_mvm_update_quotas(mvm, vif);
 844         if (ret)
 845                 goto out_rm_bcast;
 846
 847         /* Need to update the P2P Device MAC */
 848         if (vif->p2p && mvm->p2p_device_vif)
 849                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 850
 851         mutex_unlock(&mvm->mutex);
 852         return 0;
 853
 854 out_rm_bcast:
 855         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 856 out_unbind:
 857         iwl_mvm_binding_remove_vif(mvm, vif);
 858 out_remove:
 859         iwl_mvm_mac_ctxt_remove(mvm, vif);
 860 out_unlock:
 861         mutex_unlock(&mvm->mutex);
 862         return ret;
 863 }
 864
 865 static void iwl_mvm_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 866 {
 867         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 868         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 869
 870         iwl_mvm_prepare_mac_removal(mvm, vif);
 871
 872         mutex_lock(&mvm->mutex);
 873
 874         mvmvif->ap_active = false;
 875
 876         /* Need to update the P2P Device MAC */
 877         if (vif->p2p && mvm->p2p_device_vif)
 878                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);
 879
 880         iwl_mvm_update_quotas(mvm, NULL);
 881         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 882         iwl_mvm_binding_remove_vif(mvm, vif);
 883         iwl_mvm_mac_ctxt_remove(mvm, vif);
 884
 885         mutex_unlock(&mvm->mutex);
 886 }
 887
 888 static void iwl_mvm_bss_info_changed_ap(struct iwl_mvm *mvm,
 889                                         struct ieee80211_vif *vif,
 890                                         struct ieee80211_bss_conf *bss_conf,
 891                                         u32 changes)
 892 {
 893         /* Need to send a new beacon template to the FW */
 894         if (changes & BSS_CHANGED_BEACON) {
 895                 if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
 896                         IWL_WARN(mvm, "Failed updating beacon data\n");
 897         }
 898 }
 899
 900 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
 901                                      struct ieee80211_vif *vif,
 902                                      struct ieee80211_bss_conf *bss_conf,
 903                                      u32 changes)
 904 {
 905         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 906
 907         mutex_lock(&mvm->mutex);
 908
 909         switch (vif->type) {
 910         case NL80211_IFTYPE_STATION:
 911                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
 912                 break;
 913         case NL80211_IFTYPE_AP:
 914                 iwl_mvm_bss_info_changed_ap(mvm, vif, bss_conf, changes);
 915                 break;
 916         default:
 917                 /* shouldn't happen */
 918                 WARN_ON_ONCE(1);
 919         }
 920
 921         mutex_unlock(&mvm->mutex);
 922 }
 923
 924 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
 925                                struct ieee80211_vif *vif,
 926                                struct cfg80211_scan_request *req)
 927 {
 928         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 929         int ret;
 930
 931         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
 932                 return -EINVAL;
 933
 934         mutex_lock(&mvm->mutex);
 935
 936         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
 937                 ret = iwl_mvm_scan_request(mvm, vif, req);
 938         else
 939                 ret = -EBUSY;
 940
 941         mutex_unlock(&mvm->mutex);
 942
 943         return ret;
 944 }
 945
 946 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
 947                                        struct ieee80211_vif *vif)
 948 {
 949         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 950
 951         mutex_lock(&mvm->mutex);
 952
 953         iwl_mvm_cancel_scan(mvm);
 954
 955         mutex_unlock(&mvm->mutex);
 956 }
 957
 958 static void
 959 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
 960                                   struct ieee80211_sta *sta, u16 tid,
 961                                   int num_frames,
 962                                   enum ieee80211_frame_release_type reason,
 963                                   bool more_data)
 964 {
 965         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 966
 967         /* TODO: how do we tell the fw to send frames for a specific TID */
 968
 969         /*
 970          * The fw will send EOSP notification when the last frame will be
 971          * transmitted.
 972          */
 973         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
 974 }
 975
 976 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
 977                                    struct ieee80211_vif *vif,
 978                                    enum sta_notify_cmd cmd,
 979                                    struct ieee80211_sta *sta)
 980 {
 981         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 982         struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
 983
 984         switch (cmd) {
 985         case STA_NOTIFY_SLEEP:
 986                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
 987                         ieee80211_sta_block_awake(hw, sta, true);
 988                 /*
 989                  * The fw updates the STA to be asleep. Tx packets on the Tx
 990                  * queues to this station will not be transmitted. The fw will
 991                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
 992                  */
 993                 break;
 994         case STA_NOTIFY_AWAKE:
 995                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
 996                         break;
 997                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
 998                 break;
 999         default:
1000                 break;
1001         }
1002 }
1003
1004 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1005                                  struct ieee80211_vif *vif,
1006                                  struct ieee80211_sta *sta,
1007                                  enum ieee80211_sta_state old_state,
1008                                  enum ieee80211_sta_state new_state)
1009 {
1010         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1011         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1012         int ret;
1013
1014         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1015                            sta->addr, old_state, new_state);
1016
1017         /* this would be a mac80211 bug ... but don't crash */
1018         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1019                 return -EINVAL;
1020
1021         /* if a STA is being removed, reuse its ID */
1022         flush_work(&mvm->sta_drained_wk);
1023
1024         mutex_lock(&mvm->mutex);
1025         if (old_state == IEEE80211_STA_NOTEXIST &&
1026             new_state == IEEE80211_STA_NONE) {
1027                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1028         } else if (old_state == IEEE80211_STA_NONE &&
1029                    new_state == IEEE80211_STA_AUTH) {
1030                 ret = 0;
1031         } else if (old_state == IEEE80211_STA_AUTH &&
1032                    new_state == IEEE80211_STA_ASSOC) {
1033                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1034                 if (ret == 0)
1035                         iwl_mvm_rs_rate_init(mvm, sta,
1036                                              mvmvif->phy_ctxt->channel->band);
1037         } else if (old_state == IEEE80211_STA_ASSOC &&
1038                    new_state == IEEE80211_STA_AUTHORIZED) {
1039                 /* enable beacon filtering */
1040                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif));
1041                 ret = 0;
1042         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1043                    new_state == IEEE80211_STA_ASSOC) {
1044                 /* disable beacon filtering */
1045                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif));
1046                 ret = 0;
1047         } else if (old_state == IEEE80211_STA_ASSOC &&
1048                    new_state == IEEE80211_STA_AUTH) {
1049                 ret = 0;
1050         } else if (old_state == IEEE80211_STA_AUTH &&
1051                    new_state == IEEE80211_STA_NONE) {
1052                 ret = 0;
1053         } else if (old_state == IEEE80211_STA_NONE &&
1054                    new_state == IEEE80211_STA_NOTEXIST) {
1055                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1056         } else {
1057                 ret = -EIO;
1058         }
1059         mutex_unlock(&mvm->mutex);
1060
1061         return ret;
1062 }
1063
1064 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1065 {
1066         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1067
1068         mvm->rts_threshold = value;
1069
1070         return 0;
1071 }
1072
1073 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1074                                struct ieee80211_vif *vif, u16 ac,
1075                                const struct ieee80211_tx_queue_params *params)
1076 {
1077         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1078         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1079
1080         mvmvif->queue_params[ac] = *params;
1081
1082         /*
1083          * No need to update right away, we'll get BSS_CHANGED_QOS
1084          * The exception is P2P_DEVICE interface which needs immediate update.
1085          */
1086         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1087                 int ret;
1088
1089                 mutex_lock(&mvm->mutex);
1090                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
1091                 mutex_unlock(&mvm->mutex);
1092                 return ret;
1093         }
1094         return 0;
1095 }
1096
1097 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1098                                       struct ieee80211_vif *vif)
1099 {
1100         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1101         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1102                            200 + vif->bss_conf.beacon_int);
1103         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1104                                100 + vif->bss_conf.beacon_int);
1105
1106         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1107                 return;
1108
1109         mutex_lock(&mvm->mutex);
1110         /* Try really hard to protect the session and hear a beacon */
1111         iwl_mvm_protect_session(mvm, vif, duration, min_duration);
1112         mutex_unlock(&mvm->mutex);
1113 }
1114
1115 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1116                                enum set_key_cmd cmd,
1117                                struct ieee80211_vif *vif,
1118                                struct ieee80211_sta *sta,
1119                                struct ieee80211_key_conf *key)
1120 {
1121         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1122         int ret;
1123
1124         if (iwlwifi_mod_params.sw_crypto) {
1125                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1126                 return -EOPNOTSUPP;
1127         }
1128
1129         switch (key->cipher) {
1130         case WLAN_CIPHER_SUITE_TKIP:
1131                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1132                 /* fall-through */
1133         case WLAN_CIPHER_SUITE_CCMP:
1134                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1135                 break;
1136         case WLAN_CIPHER_SUITE_AES_CMAC:
1137                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1138                 break;
1139         case WLAN_CIPHER_SUITE_WEP40:
1140         case WLAN_CIPHER_SUITE_WEP104:
1141                 /*
1142                  * Support for TX only, at least for now, so accept
1143                  * the key and do nothing else. Then mac80211 will
1144                  * pass it for TX but we don't have to use it for RX.
1145                  */
1146                 return 0;
1147         default:
1148                 return -EOPNOTSUPP;
1149         }
1150
1151         mutex_lock(&mvm->mutex);
1152
1153         switch (cmd) {
1154         case SET_KEY:
1155                 if (vif->type == NL80211_IFTYPE_AP && !sta) {
1156                         /* GTK on AP interface is a TX-only key, return 0 */
1157                         ret = 0;
1158                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1159                         break;
1160                 }
1161
1162                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1163                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1164                 if (ret) {
1165                         IWL_WARN(mvm, "set key failed\n");
1166                         /*
1167                          * can't add key for RX, but we don't need it
1168                          * in the device for TX so still return 0
1169                          */
1170                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1171                         ret = 0;
1172                 }
1173
1174                 break;
1175         case DISABLE_KEY:
1176                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1177                         ret = 0;
1178                         break;
1179                 }
1180
1181                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1182                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1183                 break;
1184         default:
1185                 ret = -EINVAL;
1186         }
1187
1188         mutex_unlock(&mvm->mutex);
1189         return ret;
1190 }
1191
1192 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1193                                         struct ieee80211_vif *vif,
1194                                         struct ieee80211_key_conf *keyconf,
1195                                         struct ieee80211_sta *sta,
1196                                         u32 iv32, u16 *phase1key)
1197 {
1198         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1199
1200         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
1201 }
1202
1203
1204 static int iwl_mvm_roc(struct ieee80211_hw *hw,
1205                        struct ieee80211_vif *vif,
1206                        struct ieee80211_channel *channel,
1207                        int duration,
1208                        enum ieee80211_roc_type type)
1209 {
1210         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1211         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1212         struct cfg80211_chan_def chandef;
1213         struct iwl_mvm_phy_ctxt *phy_ctxt;
1214         int ret, i;
1215
1216         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
1217                            duration, type);
1218
1219         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
1220                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
1221                 return -EINVAL;
1222         }
1223
1224         mutex_lock(&mvm->mutex);
1225
1226         for (i = 0; i < NUM_PHY_CTX; i++) {
1227                 phy_ctxt = &mvm->phy_ctxts[i];
1228                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
1229                         continue;
1230
1231                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
1232                         /*
1233                          * Unbind the P2P_DEVICE from the current PHY context,
1234                          * and if the PHY context is not used remove it.
1235                          */
1236                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
1237                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1238                                 goto out_unlock;
1239
1240                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1241
1242                         /* Bind the P2P_DEVICE to the current PHY Context */
1243                         mvmvif->phy_ctxt = phy_ctxt;
1244
1245                         ret = iwl_mvm_binding_add_vif(mvm, vif);
1246                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1247                                 goto out_unlock;
1248
1249                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1250                         goto schedule_time_event;
1251                 }
1252         }
1253
1254         /* Need to update the PHY context only if the ROC channel changed */
1255         if (channel == mvmvif->phy_ctxt->channel)
1256                 goto schedule_time_event;
1257
1258         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
1259
1260         /*
1261          * Change the PHY context configuration as it is currently referenced
1262          * only by the P2P Device MAC
1263          */
1264         if (mvmvif->phy_ctxt->ref == 1) {
1265                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
1266                                                &chandef, 1, 1);
1267                 if (ret)
1268                         goto out_unlock;
1269         } else {
1270                 /*
1271                  * The PHY context is shared with other MACs. Need to remove the
1272                  * P2P Device from the binding, allocate an new PHY context and
1273                  * create a new binding
1274                  */
1275                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1276                 if (!phy_ctxt) {
1277                         ret = -ENOSPC;
1278                         goto out_unlock;
1279                 }
1280
1281                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
1282                                                1, 1);
1283                 if (ret) {
1284                         IWL_ERR(mvm, "Failed to change PHY context\n");
1285                         goto out_unlock;
1286                 }
1287
1288                 /* Unbind the P2P_DEVICE from the current PHY context */
1289                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
1290                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
1291                         goto out_unlock;
1292
1293                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1294
1295                 /* Bind the P2P_DEVICE to the new allocated PHY context */
1296                 mvmvif->phy_ctxt = phy_ctxt;
1297
1298                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1299                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
1300                         goto out_unlock;
1301
1302                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1303         }
1304
1305 schedule_time_event:
1306         /* Schedule the time events */
1307         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
1308
1309 out_unlock:
1310         mutex_unlock(&mvm->mutex);
1311         IWL_DEBUG_MAC80211(mvm, "leave\n");
1312         return ret;
1313 }
1314
1315 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
1316 {
1317         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1318
1319         IWL_DEBUG_MAC80211(mvm, "enter\n");
1320
1321         mutex_lock(&mvm->mutex);
1322         iwl_mvm_stop_p2p_roc(mvm);
1323         mutex_unlock(&mvm->mutex);
1324
1325         IWL_DEBUG_MAC80211(mvm, "leave\n");
1326         return 0;
1327 }
1328
1329 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
1330                                struct ieee80211_chanctx_conf *ctx)
1331 {
1332         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1333         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1334         struct iwl_mvm_phy_ctxt *phy_ctxt;
1335         int ret;
1336
1337         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
1338
1339         mutex_lock(&mvm->mutex);
1340         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1341         if (!phy_ctxt) {
1342                 ret = -ENOSPC;
1343                 goto out;
1344         }
1345
1346         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
1347                                        ctx->rx_chains_static,
1348                                        ctx->rx_chains_dynamic);
1349         if (ret) {
1350                 IWL_ERR(mvm, "Failed to add PHY context\n");
1351                 goto out;
1352         }
1353
1354         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
1355         *phy_ctxt_id = phy_ctxt->id;
1356 out:
1357         mutex_unlock(&mvm->mutex);
1358         return ret;
1359 }
1360
1361 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
1362                                    struct ieee80211_chanctx_conf *ctx)
1363 {
1364         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1365         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1366         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1367
1368         mutex_lock(&mvm->mutex);
1369         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
1370         mutex_unlock(&mvm->mutex);
1371 }
1372
1373 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
1374                                    struct ieee80211_chanctx_conf *ctx,
1375                                    u32 changed)
1376 {
1377         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1378         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1379         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1380
1381         if (WARN_ONCE((phy_ctxt->ref > 1) &&
1382                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
1383                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
1384                                    IEEE80211_CHANCTX_CHANGE_RADAR)),
1385                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
1386                       phy_ctxt->ref, changed))
1387                 return;
1388
1389         mutex_lock(&mvm->mutex);
1390         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
1391                                  ctx->rx_chains_static,
1392                                  ctx->rx_chains_dynamic);
1393         mutex_unlock(&mvm->mutex);
1394 }
1395
1396 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
1397                                       struct ieee80211_vif *vif,
1398                                       struct ieee80211_chanctx_conf *ctx)
1399 {
1400         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1401         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
1402         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
1403         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1404         int ret;
1405
1406         mutex_lock(&mvm->mutex);
1407
1408         mvmvif->phy_ctxt = phy_ctxt;
1409
1410         switch (vif->type) {
1411         case NL80211_IFTYPE_AP:
1412                 /*
1413                  * The AP binding flow is handled as part of the start_ap flow
1414                  * (in bss_info_changed).
1415                  */
1416                 ret = 0;
1417                 goto out_unlock;
1418         case NL80211_IFTYPE_STATION:
1419         case NL80211_IFTYPE_ADHOC:
1420         case NL80211_IFTYPE_MONITOR:
1421                 break;
1422         default:
1423                 ret = -EINVAL;
1424                 goto out_unlock;
1425         }
1426
1427         ret = iwl_mvm_binding_add_vif(mvm, vif);
1428         if (ret)
1429                 goto out_unlock;
1430
1431         /*
1432          * Setting the quota at this stage is only required for monitor
1433          * interfaces. For the other types, the bss_info changed flow
1434          * will handle quota settings.
1435          */
1436         if (vif->type == NL80211_IFTYPE_MONITOR) {
1437                 mvmvif->monitor_active = true;
1438                 ret = iwl_mvm_update_quotas(mvm, vif);
1439                 if (ret)
1440                         goto out_remove_binding;
1441         }
1442
1443         goto out_unlock;
1444
1445  out_remove_binding:
1446         iwl_mvm_binding_remove_vif(mvm, vif);
1447  out_unlock:
1448         mutex_unlock(&mvm->mutex);
1449         if (ret)
1450                 mvmvif->phy_ctxt = NULL;
1451         return ret;
1452 }
1453
1454 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
1455                                          struct ieee80211_vif *vif,
1456                                          struct ieee80211_chanctx_conf *ctx)
1457 {
1458         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1459         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1460
1461         mutex_lock(&mvm->mutex);
1462
1463         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
1464
1465         if (vif->type == NL80211_IFTYPE_AP)
1466                 goto out_unlock;
1467
1468         switch (vif->type) {
1469         case NL80211_IFTYPE_MONITOR:
1470                 mvmvif->monitor_active = false;
1471                 iwl_mvm_update_quotas(mvm, NULL);
1472                 break;
1473         default:
1474                 break;
1475         }
1476
1477         iwl_mvm_binding_remove_vif(mvm, vif);
1478 out_unlock:
1479         mvmvif->phy_ctxt = NULL;
1480         mutex_unlock(&mvm->mutex);
1481 }
1482
1483 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
1484                            struct ieee80211_sta *sta,
1485                            bool set)
1486 {
1487         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1488         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1489
1490         if (!mvm_sta || !mvm_sta->vif) {
1491                 IWL_ERR(mvm, "Station is not associated to a vif\n");
1492                 return -EINVAL;
1493         }
1494
1495         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
1496 }
1497
1498 static void iwl_mvm_mac_rssi_callback(struct ieee80211_hw *hw,
1499                                       struct ieee80211_vif *vif,
1500                                       enum ieee80211_rssi_event rssi_event)
1501 {
1502         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1503
1504         iwl_mvm_bt_rssi_event(mvm, vif, rssi_event);
1505 }
1506
1507 struct ieee80211_ops iwl_mvm_hw_ops = {
1508         .tx = iwl_mvm_mac_tx,
1509         .ampdu_action = iwl_mvm_mac_ampdu_action,
1510         .start = iwl_mvm_mac_start,
1511         .restart_complete = iwl_mvm_mac_restart_complete,
1512         .stop = iwl_mvm_mac_stop,
1513         .add_interface = iwl_mvm_mac_add_interface,
1514         .remove_interface = iwl_mvm_mac_remove_interface,
1515         .config = iwl_mvm_mac_config,
1516         .configure_filter = iwl_mvm_configure_filter,
1517         .bss_info_changed = iwl_mvm_bss_info_changed,
1518         .hw_scan = iwl_mvm_mac_hw_scan,
1519         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
1520         .sta_state = iwl_mvm_mac_sta_state,
1521         .sta_notify = iwl_mvm_mac_sta_notify,
1522         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
1523         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
1524         .conf_tx = iwl_mvm_mac_conf_tx,
1525         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
1526         .set_key = iwl_mvm_mac_set_key,
1527         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
1528         .remain_on_channel = iwl_mvm_roc,
1529         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
1530         .rssi_callback = iwl_mvm_mac_rssi_callback,
1531
1532         .add_chanctx = iwl_mvm_add_chanctx,
1533         .remove_chanctx = iwl_mvm_remove_chanctx,
1534         .change_chanctx = iwl_mvm_change_chanctx,
1535         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
1536         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
1537
1538         .start_ap = iwl_mvm_start_ap,
1539         .stop_ap = iwl_mvm_stop_ap,
1540
1541         .set_tim = iwl_mvm_set_tim,
1542
1543 #ifdef CONFIG_PM_SLEEP
1544         /* look at d3.c */
1545         .suspend = iwl_mvm_suspend,
1546         .resume = iwl_mvm_resume,
1547         .set_wakeup = iwl_mvm_set_wakeup,
1548         .set_rekey_data = iwl_mvm_set_rekey_data,
1549 #if IS_ENABLED(CONFIG_IPV6)
1550         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
1551 #endif
1552         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
1553 #endif
1554 };