drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
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  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
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  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  38  * All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  *
  44  *  * Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
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  47  *    notice, this list of conditions and the following disclaimer in
  48  *    the documentation and/or other materials provided with the
  49  *    distribution.
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  51  *    contributors may be used to endorse or promote products derived
  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  59  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67
  68 #include <linux/etherdevice.h>
  69 #include <net/mac80211.h>
  70 #include "iwl-io.h"
  71 #include "iwl-prph.h"
  72 #include "fw-api.h"
  73 #include "mvm.h"
  74 #include "time-event.h"
  75 #include "fw-dbg.h"
  76
  77 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  78         IWL_MVM_TX_FIFO_VO,
  79         IWL_MVM_TX_FIFO_VI,
  80         IWL_MVM_TX_FIFO_BE,
  81         IWL_MVM_TX_FIFO_BK,
  82 };
  83
  84 struct iwl_mvm_mac_iface_iterator_data {
  85         struct iwl_mvm *mvm;
  86         struct ieee80211_vif *vif;
  87         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  88         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  89         enum iwl_tsf_id preferred_tsf;
  90         bool found_vif;
  91 };
  92
  93 struct iwl_mvm_hw_queues_iface_iterator_data {
  94         struct ieee80211_vif *exclude_vif;
  95         unsigned long used_hw_queues;
  96 };
  97
  98 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  99                                     struct ieee80211_vif *vif)
 100 {
 101         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 102         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 103         u16 min_bi;
 104
 105         /* Skip the interface for which we are trying to assign a tsf_id  */
 106         if (vif == data->vif)
 107                 return;
 108
 109         /*
 110          * The TSF is a hardware/firmware resource, there are 4 and
 111          * the driver should assign and free them as needed. However,
 112          * there are cases where 2 MACs should share the same TSF ID
 113          * for the purpose of clock sync, an optimization to avoid
 114          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 115          * client in the system.
 116          *
 117          * The firmware will decide according to the MAC type which
 118          * will be the master and slave. Clients that need to sync
 119          * with a remote station will be the master, and an AP or GO
 120          * will be the slave.
 121          *
 122          * Depending on the new interface type it can be slaved to
 123          * or become the master of an existing interface.
 124          */
 125         switch (data->vif->type) {
 126         case NL80211_IFTYPE_STATION:
 127                 /*
 128                  * The new interface is a client, so if the one we're iterating
 129                  * is an AP, and the beacon interval of the AP is a multiple or
 130                  * divisor of the beacon interval of the client, the same TSF
 131                  * should be used to avoid drift between the new client and
 132                  * existing AP. The existing AP will get drift updates from the
 133                  * new client context in this case.
 134                  */
 135                 if (vif->type != NL80211_IFTYPE_AP ||
 136                     data->preferred_tsf != NUM_TSF_IDS ||
 137                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 138                         break;
 139
 140                 min_bi = min(data->vif->bss_conf.beacon_int,
 141                              vif->bss_conf.beacon_int);
 142
 143                 if (!min_bi)
 144                         break;
 145
 146                 if ((data->vif->bss_conf.beacon_int -
 147                      vif->bss_conf.beacon_int) % min_bi == 0) {
 148                         data->preferred_tsf = mvmvif->tsf_id;
 149                         return;
 150                 }
 151                 break;
 152
 153         case NL80211_IFTYPE_AP:
 154                 /*
 155                  * The new interface is AP/GO, so if its beacon interval is a
 156                  * multiple or a divisor of the beacon interval of an existing
 157                  * interface, it should get drift updates from an existing
 158                  * client or use the same TSF as an existing GO. There's no
 159                  * drift between TSFs internally but if they used different
 160                  * TSFs then a new client MAC could update one of them and
 161                  * cause drift that way.
 162                  */
 163                 if ((vif->type != NL80211_IFTYPE_AP &&
 164                      vif->type != NL80211_IFTYPE_STATION) ||
 165                     data->preferred_tsf != NUM_TSF_IDS ||
 166                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 167                         break;
 168
 169                 min_bi = min(data->vif->bss_conf.beacon_int,
 170                              vif->bss_conf.beacon_int);
 171
 172                 if (!min_bi)
 173                         break;
 174
 175                 if ((data->vif->bss_conf.beacon_int -
 176                      vif->bss_conf.beacon_int) % min_bi == 0) {
 177                         data->preferred_tsf = mvmvif->tsf_id;
 178                         return;
 179                 }
 180                 break;
 181         default:
 182                 /*
 183                  * For all other interface types there's no need to
 184                  * take drift into account. Either they're exclusive
 185                  * like IBSS and monitor, or we don't care much about
 186                  * their TSF (like P2P Device), but we won't be able
 187                  * to share the TSF resource.
 188                  */
 189                 break;
 190         }
 191
 192         /*
 193          * Unless we exited above, we can't share the TSF resource
 194          * that the virtual interface we're iterating over is using
 195          * with the new one, so clear the available bit and if this
 196          * was the preferred one, reset that as well.
 197          */
 198         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 199
 200         if (data->preferred_tsf == mvmvif->tsf_id)
 201                 data->preferred_tsf = NUM_TSF_IDS;
 202 }
 203
 204 /*
 205  * Get the mask of the queues used by the vif
 206  */
 207 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
 208 {
 209         u32 qmask = 0, ac;
 210
 211         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 212                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 213
 214         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 215                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 216                         qmask |= BIT(vif->hw_queue[ac]);
 217         }
 218
 219         if (vif->type == NL80211_IFTYPE_AP)
 220                 qmask |= BIT(vif->cab_queue);
 221
 222         return qmask;
 223 }
 224
 225 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
 226                                          struct ieee80211_vif *vif)
 227 {
 228         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 229
 230         /* exclude the given vif */
 231         if (vif == data->exclude_vif)
 232                 return;
 233
 234         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 235 }
 236
 237 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data,
 238                                            struct ieee80211_sta *sta)
 239 {
 240         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 241         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 242
 243         /* Mark the queues used by the sta */
 244         data->used_hw_queues |= mvmsta->tfd_queue_msk;
 245 }
 246
 247 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 248                                          struct ieee80211_vif *exclude_vif)
 249 {
 250         u8 sta_id;
 251         struct iwl_mvm_hw_queues_iface_iterator_data data = {
 252                 .exclude_vif = exclude_vif,
 253                 .used_hw_queues =
 254                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 255                         BIT(mvm->aux_queue),
 256         };
 257
 258         if (iwl_mvm_is_dqa_supported(mvm))
 259                 data.used_hw_queues |= BIT(IWL_MVM_DQA_CMD_QUEUE);
 260         else
 261                 data.used_hw_queues |= BIT(IWL_MVM_CMD_QUEUE);
 262
 263         lockdep_assert_held(&mvm->mutex);
 264
 265         /* mark all VIF used hw queues */
 266         ieee80211_iterate_active_interfaces_atomic(
 267                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 268                 iwl_mvm_iface_hw_queues_iter, &data);
 269
 270         /* don't assign the same hw queues as TDLS stations */
 271         ieee80211_iterate_stations_atomic(mvm->hw,
 272                                           iwl_mvm_mac_sta_hw_queues_iter,
 273                                           &data);
 274
 275         /*
 276          * Some TDLS stations may be removed but are in the process of being
 277          * drained. Don't touch their queues.
 278          */
 279         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT)
 280                 data.used_hw_queues |= mvm->tfd_drained[sta_id];
 281
 282         return data.used_hw_queues;
 283 }
 284
 285 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 286                                        struct ieee80211_vif *vif)
 287 {
 288         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 289         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 290
 291         /* Iterator may already find the interface being added -- skip it */
 292         if (vif == data->vif) {
 293                 data->found_vif = true;
 294                 return;
 295         }
 296
 297         /* Mark MAC IDs as used by clearing the available bit, and
 298          * (below) mark TSFs as used if their existing use is not
 299          * compatible with the new interface type.
 300          * No locking or atomic bit operations are needed since the
 301          * data is on the stack of the caller function.
 302          */
 303         __clear_bit(mvmvif->id, data->available_mac_ids);
 304
 305         /* find a suitable tsf_id */
 306         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 307 }
 308
 309 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 310                                     struct ieee80211_vif *vif)
 311 {
 312         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 313         struct iwl_mvm_mac_iface_iterator_data data = {
 314                 .mvm = mvm,
 315                 .vif = vif,
 316                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 317                 /* no preference yet */
 318                 .preferred_tsf = NUM_TSF_IDS,
 319         };
 320
 321         ieee80211_iterate_active_interfaces_atomic(
 322                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 323                 iwl_mvm_mac_tsf_id_iter, &data);
 324
 325         if (data.preferred_tsf != NUM_TSF_IDS)
 326                 mvmvif->tsf_id = data.preferred_tsf;
 327         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 328                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 329                                                 NUM_TSF_IDS);
 330 }
 331
 332 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 333                                                struct ieee80211_vif *vif)
 334 {
 335         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 336         struct iwl_mvm_mac_iface_iterator_data data = {
 337                 .mvm = mvm,
 338                 .vif = vif,
 339                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 340                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 341                 /* no preference yet */
 342                 .preferred_tsf = NUM_TSF_IDS,
 343                 .found_vif = false,
 344         };
 345         u32 ac;
 346         int ret, i;
 347         unsigned long used_hw_queues;
 348
 349         /*
 350          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 351          * and other resources.
 352          */
 353
 354         /*
 355          * Before the iterator, we start with all MAC IDs and TSFs available.
 356          *
 357          * During iteration, all MAC IDs are cleared that are in use by other
 358          * virtual interfaces, and all TSF IDs are cleared that can't be used
 359          * by this new virtual interface because they're used by an interface
 360          * that can't share it with the new one.
 361          * At the same time, we check if there's a preferred TSF in the case
 362          * that we should share it with another interface.
 363          */
 364
 365         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 366         switch (vif->type) {
 367         case NL80211_IFTYPE_ADHOC:
 368                 break;
 369         case NL80211_IFTYPE_STATION:
 370                 if (!vif->p2p)
 371                         break;
 372                 /* fall through */
 373         default:
 374                 __clear_bit(0, data.available_mac_ids);
 375         }
 376
 377         ieee80211_iterate_active_interfaces_atomic(
 378                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 379                 iwl_mvm_mac_iface_iterator, &data);
 380
 381         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
 382
 383         /*
 384          * In the case we're getting here during resume, it's similar to
 385          * firmware restart, and with RESUME_ALL the iterator will find
 386          * the vif being added already.
 387          * We don't want to reassign any IDs in either case since doing
 388          * so would probably assign different IDs (as interfaces aren't
 389          * necessarily added in the same order), but the old IDs were
 390          * preserved anyway, so skip ID assignment for both resume and
 391          * recovery.
 392          */
 393         if (data.found_vif)
 394                 return 0;
 395
 396         /* Therefore, in recovery, we can't get here */
 397         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 398                 return -EBUSY;
 399
 400         mvmvif->id = find_first_bit(data.available_mac_ids,
 401                                     NUM_MAC_INDEX_DRIVER);
 402         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 403                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 404                 ret = -EIO;
 405                 goto exit_fail;
 406         }
 407
 408         if (data.preferred_tsf != NUM_TSF_IDS)
 409                 mvmvif->tsf_id = data.preferred_tsf;
 410         else
 411                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 412                                                 NUM_TSF_IDS);
 413         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 414                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 415                 ret = -EIO;
 416                 goto exit_fail;
 417         }
 418
 419         mvmvif->color = 0;
 420
 421         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 422         mvmvif->time_event_data.id = TE_MAX;
 423
 424         /* No need to allocate data queues to P2P Device MAC.*/
 425         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 426                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 427                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 428
 429                 return 0;
 430         }
 431
 432         /*
 433          * Find available queues, and allocate them to the ACs. When in
 434          * DQA-mode they aren't really used, and this is done only so the
 435          * mac80211 ieee80211_check_queues() function won't fail
 436          */
 437         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 438                 u8 queue = find_first_zero_bit(&used_hw_queues,
 439                                                mvm->first_agg_queue);
 440
 441                 if (!iwl_mvm_is_dqa_supported(mvm) &&
 442                     queue >= mvm->first_agg_queue) {
 443                         IWL_ERR(mvm, "Failed to allocate queue\n");
 444                         ret = -EIO;
 445                         goto exit_fail;
 446                 }
 447
 448                 __set_bit(queue, &used_hw_queues);
 449                 vif->hw_queue[ac] = queue;
 450         }
 451
 452         /* Allocate the CAB queue for softAP and GO interfaces */
 453         if (vif->type == NL80211_IFTYPE_AP) {
 454                 u8 queue;
 455
 456                 if (!iwl_mvm_is_dqa_supported(mvm)) {
 457                         queue = find_first_zero_bit(&used_hw_queues,
 458                                                     mvm->first_agg_queue);
 459
 460                         if (queue >= mvm->first_agg_queue) {
 461                                 IWL_ERR(mvm, "Failed to allocate cab queue\n");
 462                                 ret = -EIO;
 463                                 goto exit_fail;
 464                         }
 465                 } else {
 466                         queue = IWL_MVM_DQA_GCAST_QUEUE;
 467                 }
 468
 469                 vif->cab_queue = queue;
 470         } else {
 471                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 472         }
 473
 474         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 475         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 476
 477         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 478                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 479
 480         return 0;
 481
 482 exit_fail:
 483         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 484         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 485         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 486         return ret;
 487 }
 488
 489 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 490 {
 491         unsigned int wdg_timeout =
 492                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
 493         u32 ac;
 494         int ret;
 495
 496         lockdep_assert_held(&mvm->mutex);
 497
 498         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 499         if (ret)
 500                 return ret;
 501
 502         switch (vif->type) {
 503         case NL80211_IFTYPE_P2P_DEVICE:
 504                 if (!iwl_mvm_is_dqa_supported(mvm))
 505                         iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 506                                               IWL_MVM_OFFCHANNEL_QUEUE,
 507                                               IWL_MVM_TX_FIFO_VO, 0,
 508                                               wdg_timeout);
 509                 break;
 510         case NL80211_IFTYPE_AP:
 511                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue,
 512                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 513                 /* fall through */
 514         default:
 515                 /* If DQA is supported - queues will be enabled when needed */
 516                 if (iwl_mvm_is_dqa_supported(mvm))
 517                         break;
 518
 519                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 520                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 521                                               vif->hw_queue[ac],
 522                                               iwl_mvm_ac_to_tx_fifo[ac], 0,
 523                                               wdg_timeout);
 524                 break;
 525         }
 526
 527         return 0;
 528 }
 529
 530 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 531 {
 532         int ac;
 533
 534         lockdep_assert_held(&mvm->mutex);
 535
 536         switch (vif->type) {
 537         case NL80211_IFTYPE_P2P_DEVICE:
 538                 if (!iwl_mvm_is_dqa_supported(mvm))
 539                         iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 540                                             IWL_MVM_OFFCHANNEL_QUEUE,
 541                                             IWL_MAX_TID_COUNT, 0);
 542                 else
 543                         iwl_mvm_disable_txq(mvm,
 544                                             IWL_MVM_DQA_P2P_DEVICE_QUEUE,
 545                                             vif->hw_queue[0], IWL_MAX_TID_COUNT,
 546                                             0);
 547
 548                 break;
 549         case NL80211_IFTYPE_AP:
 550                 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
 551                                     IWL_MAX_TID_COUNT, 0);
 552
 553                 if (iwl_mvm_is_dqa_supported(mvm))
 554                         iwl_mvm_disable_txq(mvm,
 555                                             IWL_MVM_DQA_AP_PROBE_RESP_QUEUE,
 556                                             vif->hw_queue[0], IWL_MAX_TID_COUNT,
 557                                             0);
 558                 /* fall through */
 559         default:
 560                 /*
 561                  * If DQA is supported - queues were already disabled, since in
 562                  * DQA-mode the queues are a property of the STA and not of the
 563                  * vif, and at this point the STA was already deleted
 564                  */
 565                 if (iwl_mvm_is_dqa_supported(mvm))
 566                         break;
 567
 568                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 569                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac],
 570                                             vif->hw_queue[ac],
 571                                             IWL_MAX_TID_COUNT, 0);
 572         }
 573 }
 574
 575 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 576                               struct ieee80211_vif *vif,
 577                               enum nl80211_band band,
 578                               u8 *cck_rates, u8 *ofdm_rates)
 579 {
 580         struct ieee80211_supported_band *sband;
 581         unsigned long basic = vif->bss_conf.basic_rates;
 582         int lowest_present_ofdm = 100;
 583         int lowest_present_cck = 100;
 584         u8 cck = 0;
 585         u8 ofdm = 0;
 586         int i;
 587
 588         sband = mvm->hw->wiphy->bands[band];
 589
 590         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 591                 int hw = sband->bitrates[i].hw_value;
 592                 if (hw >= IWL_FIRST_OFDM_RATE) {
 593                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 594                         if (lowest_present_ofdm > hw)
 595                                 lowest_present_ofdm = hw;
 596                 } else {
 597                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 598
 599                         cck |= BIT(hw);
 600                         if (lowest_present_cck > hw)
 601                                 lowest_present_cck = hw;
 602                 }
 603         }
 604
 605         /*
 606          * Now we've got the basic rates as bitmaps in the ofdm and cck
 607          * variables. This isn't sufficient though, as there might not
 608          * be all the right rates in the bitmap. E.g. if the only basic
 609          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 610          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 611          *
 612          *    [...] a STA responding to a received frame shall transmit
 613          *    its Control Response frame [...] at the highest rate in the
 614          *    BSSBasicRateSet parameter that is less than or equal to the
 615          *    rate of the immediately previous frame in the frame exchange
 616          *    sequence ([...]) and that is of the same modulation class
 617          *    ([...]) as the received frame. If no rate contained in the
 618          *    BSSBasicRateSet parameter meets these conditions, then the
 619          *    control frame sent in response to a received frame shall be
 620          *    transmitted at the highest mandatory rate of the PHY that is
 621          *    less than or equal to the rate of the received frame, and
 622          *    that is of the same modulation class as the received frame.
 623          *
 624          * As a consequence, we need to add all mandatory rates that are
 625          * lower than all of the basic rates to these bitmaps.
 626          */
 627
 628         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 629                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 630         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 631                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 632         /* 6M already there or needed so always add */
 633         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 634
 635         /*
 636          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 637          * Note, however:
 638          *  - if no CCK rates are basic, it must be ERP since there must
 639          *    be some basic rates at all, so they're OFDM => ERP PHY
 640          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 641          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 642          *  - if 5.5M is basic, 1M and 2M are mandatory
 643          *  - if 2M is basic, 1M is mandatory
 644          *  - if 1M is basic, that's the only valid ACK rate.
 645          * As a consequence, it's not as complicated as it sounds, just add
 646          * any lower rates to the ACK rate bitmap.
 647          */
 648         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 649                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 650         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 651                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 652         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 653                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 654         /* 1M already there or needed so always add */
 655         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 656
 657         *cck_rates = cck;
 658         *ofdm_rates = ofdm;
 659 }
 660
 661 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 662                                          struct ieee80211_vif *vif,
 663                                          struct iwl_mac_ctx_cmd *cmd)
 664 {
 665         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 666         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 667                                  IEEE80211_HT_OP_MODE_PROTECTION;
 668         /* The fw does not distinguish between ht and fat */
 669         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 670
 671         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 672         /*
 673          * See section 9.23.3.1 of IEEE 80211-2012.
 674          * Nongreenfield HT STAs Present is not supported.
 675          */
 676         switch (protection_mode) {
 677         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 678                 break;
 679         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 680         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 681                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 682                 break;
 683         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 684                 /* Protect when channel wider than 20MHz */
 685                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 686                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 687                 break;
 688         default:
 689                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 690                         protection_mode);
 691                 break;
 692         }
 693 }
 694
 695 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 696                                         struct ieee80211_vif *vif,
 697                                         struct iwl_mac_ctx_cmd *cmd,
 698                                         const u8 *bssid_override,
 699                                         u32 action)
 700 {
 701         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 702         struct ieee80211_chanctx_conf *chanctx;
 703         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 704                              IEEE80211_HT_OP_MODE_PROTECTION);
 705         u8 cck_ack_rates, ofdm_ack_rates;
 706         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 707         int i;
 708
 709         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 710                                                             mvmvif->color));
 711         cmd->action = cpu_to_le32(action);
 712
 713         switch (vif->type) {
 714         case NL80211_IFTYPE_STATION:
 715                 if (vif->p2p)
 716                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 717                 else
 718                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 719                 break;
 720         case NL80211_IFTYPE_AP:
 721                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 722                 break;
 723         case NL80211_IFTYPE_MONITOR:
 724                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 725                 break;
 726         case NL80211_IFTYPE_P2P_DEVICE:
 727                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 728                 break;
 729         case NL80211_IFTYPE_ADHOC:
 730                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 731                 break;
 732         default:
 733                 WARN_ON_ONCE(1);
 734         }
 735
 736         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 737
 738         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 739
 740         if (bssid)
 741                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 742         else
 743                 eth_broadcast_addr(cmd->bssid_addr);
 744
 745         rcu_read_lock();
 746         chanctx = rcu_dereference(vif->chanctx_conf);
 747         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 748                                             : NL80211_BAND_2GHZ,
 749                           &cck_ack_rates, &ofdm_ack_rates);
 750         rcu_read_unlock();
 751
 752         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 753         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 754
 755         cmd->cck_short_preamble =
 756                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 757                             MAC_FLG_SHORT_PREAMBLE : 0);
 758         cmd->short_slot =
 759                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 760                             MAC_FLG_SHORT_SLOT : 0);
 761
 762         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 763
 764         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 765                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 766
 767                 cmd->ac[txf].cw_min =
 768                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 769                 cmd->ac[txf].cw_max =
 770                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 771                 cmd->ac[txf].edca_txop =
 772                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 773                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 774                 cmd->ac[txf].fifos_mask = BIT(txf);
 775         }
 776
 777         if (vif->type == NL80211_IFTYPE_AP) {
 778                 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 779                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 780                         BIT(IWL_MVM_TX_FIFO_MCAST);
 781
 782                 /*
 783                  * in AP mode, pass probe requests and beacons from other APs
 784                  * (needed for ht protection); when there're no any associated
 785                  * station don't ask FW to pass beacons to prevent unnecessary
 786                  * wake-ups.
 787                  */
 788                 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 789                 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
 790                         cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 791                         IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
 792                 } else {
 793                         IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
 794                 }
 795         }
 796
 797         if (vif->bss_conf.qos)
 798                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 799
 800         if (vif->bss_conf.use_cts_prot)
 801                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 802
 803         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 804                        vif->bss_conf.use_cts_prot,
 805                        vif->bss_conf.ht_operation_mode);
 806         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 807                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 808         if (ht_enabled)
 809                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 810 }
 811
 812 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 813                                      struct iwl_mac_ctx_cmd *cmd)
 814 {
 815         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 816                                        sizeof(*cmd), cmd);
 817         if (ret)
 818                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 819                         le32_to_cpu(cmd->action), ret);
 820         return ret;
 821 }
 822
 823 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 824                                     struct ieee80211_vif *vif,
 825                                     u32 action, bool force_assoc_off,
 826                                     const u8 *bssid_override)
 827 {
 828         struct iwl_mac_ctx_cmd cmd = {};
 829         struct iwl_mac_data_sta *ctxt_sta;
 830
 831         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 832
 833         /* Fill the common data for all mac context types */
 834         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 835
 836         if (vif->p2p) {
 837                 struct ieee80211_p2p_noa_attr *noa =
 838                         &vif->bss_conf.p2p_noa_attr;
 839
 840                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 841                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 842                 ctxt_sta = &cmd.p2p_sta.sta;
 843         } else {
 844                 ctxt_sta = &cmd.sta;
 845         }
 846
 847         /* We need the dtim_period to set the MAC as associated */
 848         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 849             !force_assoc_off) {
 850                 u32 dtim_offs;
 851
 852                 /*
 853                  * The DTIM count counts down, so when it is N that means N
 854                  * more beacon intervals happen until the DTIM TBTT. Therefore
 855                  * add this to the current time. If that ends up being in the
 856                  * future, the firmware will handle it.
 857                  *
 858                  * Also note that the system_timestamp (which we get here as
 859                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 860                  * same offset in the frame -- the TSF is at the first symbol
 861                  * of the TSF, the system timestamp is at signal acquisition
 862                  * time. This means there's an offset between them of at most
 863                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 864                  * 384us in the longest case), this is currently not relevant
 865                  * as the firmware wakes up around 2ms before the TBTT.
 866                  */
 867                 dtim_offs = vif->bss_conf.sync_dtim_count *
 868                                 vif->bss_conf.beacon_int;
 869                 /* convert TU to usecs */
 870                 dtim_offs *= 1024;
 871
 872                 ctxt_sta->dtim_tsf =
 873                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 874                 ctxt_sta->dtim_time =
 875                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 876
 877                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 878                                le64_to_cpu(ctxt_sta->dtim_tsf),
 879                                le32_to_cpu(ctxt_sta->dtim_time),
 880                                dtim_offs);
 881
 882                 ctxt_sta->is_assoc = cpu_to_le32(1);
 883         } else {
 884                 ctxt_sta->is_assoc = cpu_to_le32(0);
 885
 886                 /* Allow beacons to pass through as long as we are not
 887                  * associated, or we do not have dtim period information.
 888                  */
 889                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 890         }
 891
 892         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 893         ctxt_sta->bi_reciprocal =
 894                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 895         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 896                                               vif->bss_conf.dtim_period);
 897         ctxt_sta->dtim_reciprocal =
 898                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 899                                                vif->bss_conf.dtim_period));
 900
 901         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 902         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 903
 904         if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 905                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 906
 907         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 908 }
 909
 910 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 911                                          struct ieee80211_vif *vif,
 912                                          u32 action)
 913 {
 914         struct iwl_mac_ctx_cmd cmd = {};
 915         u32 tfd_queue_msk = 0;
 916         int ret, i;
 917
 918         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 919
 920         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 921
 922         for (i = 0; i < IEEE80211_NUM_ACS; i++)
 923                 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
 924                         tfd_queue_msk |= BIT(vif->hw_queue[i]);
 925
 926         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 927                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 928                                        MAC_FILTER_IN_BEACON |
 929                                        MAC_FILTER_IN_PROBE_REQUEST |
 930                                        MAC_FILTER_IN_CRC32);
 931         ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 932
 933         /* Allocate sniffer station */
 934         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
 935                                        vif->type);
 936         if (ret)
 937                 return ret;
 938
 939         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 940 }
 941
 942 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 943                                      struct ieee80211_vif *vif,
 944                                      u32 action)
 945 {
 946         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 947         struct iwl_mac_ctx_cmd cmd = {};
 948
 949         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 950
 951         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 952
 953         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 954                                        MAC_FILTER_IN_PROBE_REQUEST);
 955
 956         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 957         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 958         cmd.ibss.bi_reciprocal =
 959                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 960
 961         /* TODO: Assumes that the beacon id == mac context id */
 962         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 963
 964         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 965 }
 966
 967 struct iwl_mvm_go_iterator_data {
 968         bool go_active;
 969 };
 970
 971 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 972 {
 973         struct iwl_mvm_go_iterator_data *data = _data;
 974         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 975
 976         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 977             mvmvif->ap_ibss_active)
 978                 data->go_active = true;
 979 }
 980
 981 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 982                                            struct ieee80211_vif *vif,
 983                                            u32 action)
 984 {
 985         struct iwl_mac_ctx_cmd cmd = {};
 986         struct iwl_mvm_go_iterator_data data = {};
 987
 988         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 989
 990         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 991
 992         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 993
 994         /* Override the filter flags to accept only probe requests */
 995         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 996
 997         /*
 998          * This flag should be set to true when the P2P Device is
 999          * discoverable and there is at least another active P2P GO. Settings
1000          * this flag will allow the P2P Device to be discoverable on other
1001          * channels in addition to its listen channel.
1002          * Note that this flag should not be set in other cases as it opens the
1003          * Rx filters on all MAC and increases the number of interrupts.
1004          */
1005         ieee80211_iterate_active_interfaces_atomic(
1006                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1007                 iwl_mvm_go_iterator, &data);
1008
1009         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
1010         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1011 }
1012
1013 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
1014                                      struct iwl_mac_beacon_cmd_v6 *beacon_cmd,
1015                                      u8 *beacon, u32 frame_size)
1016 {
1017         u32 tim_idx;
1018         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
1019
1020         /* The index is relative to frame start but we start looking at the
1021          * variable-length part of the beacon. */
1022         tim_idx = mgmt->u.beacon.variable - beacon;
1023
1024         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
1025         while ((tim_idx < (frame_size - 2)) &&
1026                         (beacon[tim_idx] != WLAN_EID_TIM))
1027                 tim_idx += beacon[tim_idx+1] + 2;
1028
1029         /* If TIM field was found, set variables */
1030         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
1031                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
1032                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
1033         } else {
1034                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
1035         }
1036 }
1037
1038 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
1039 {
1040         struct ieee80211_mgmt *mgmt = (void *)beacon;
1041         const u8 *ie;
1042
1043         if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
1044                 return 0;
1045
1046         frame_size -= mgmt->u.beacon.variable - beacon;
1047
1048         ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
1049         if (!ie)
1050                 return 0;
1051
1052         return ie - beacon;
1053 }
1054
1055 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
1056                                         struct ieee80211_vif *vif,
1057                                         struct sk_buff *beacon)
1058 {
1059         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1060         struct iwl_host_cmd cmd = {
1061                 .id = BEACON_TEMPLATE_CMD,
1062                 .flags = CMD_ASYNC,
1063         };
1064         union {
1065                 struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6;
1066                 struct iwl_mac_beacon_cmd beacon_cmd;
1067         } u = {};
1068         struct ieee80211_tx_info *info;
1069         u32 beacon_skb_len;
1070         u32 rate, tx_flags;
1071
1072         if (WARN_ON(!beacon))
1073                 return -EINVAL;
1074
1075         beacon_skb_len = beacon->len;
1076
1077         /* TODO: for now the beacon template id is set to be the mac context id.
1078          * Might be better to handle it as another resource ... */
1079         u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id);
1080         info = IEEE80211_SKB_CB(beacon);
1081
1082         /* Set up TX command fields */
1083         u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len);
1084         u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id;
1085         u.beacon_cmd_v6.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
1086         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
1087         tx_flags |=
1088                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
1089                                                 TX_CMD_FLG_BT_PRIO_POS;
1090         u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags);
1091
1092         if (!fw_has_capa(&mvm->fw->ucode_capa,
1093                          IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) {
1094                 mvm->mgmt_last_antenna_idx =
1095                         iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
1096                                              mvm->mgmt_last_antenna_idx);
1097         }
1098
1099         u.beacon_cmd_v6.tx.rate_n_flags =
1100                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
1101                             RATE_MCS_ANT_POS);
1102
1103         if (info->band == NL80211_BAND_5GHZ || vif->p2p) {
1104                 rate = IWL_FIRST_OFDM_RATE;
1105         } else {
1106                 rate = IWL_FIRST_CCK_RATE;
1107                 u.beacon_cmd_v6.tx.rate_n_flags |=
1108                                         cpu_to_le32(RATE_MCS_CCK_MSK);
1109         }
1110         u.beacon_cmd_v6.tx.rate_n_flags |=
1111                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
1112
1113         /* Set up TX beacon command fields */
1114         if (vif->type == NL80211_IFTYPE_AP)
1115                 iwl_mvm_mac_ctxt_set_tim(mvm, &u.beacon_cmd_v6,
1116                                          beacon->data,
1117                                          beacon_skb_len);
1118
1119         /* Submit command */
1120
1121         if (fw_has_capa(&mvm->fw->ucode_capa,
1122                         IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) {
1123                 u.beacon_cmd.csa_offset =
1124                         cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1125                                                     WLAN_EID_CHANNEL_SWITCH,
1126                                                     beacon_skb_len));
1127                 u.beacon_cmd.ecsa_offset =
1128                         cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1129                                                     WLAN_EID_EXT_CHANSWITCH_ANN,
1130                                                     beacon_skb_len));
1131
1132                 cmd.len[0] = sizeof(u.beacon_cmd);
1133         } else {
1134                 cmd.len[0] = sizeof(u.beacon_cmd_v6);
1135         }
1136
1137         cmd.data[0] = &u;
1138         cmd.dataflags[0] = 0;
1139         cmd.len[1] = beacon_skb_len;
1140         cmd.data[1] = beacon->data;
1141         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
1142
1143         return iwl_mvm_send_cmd(mvm, &cmd);
1144 }
1145
1146 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1147 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1148                                     struct ieee80211_vif *vif)
1149 {
1150         struct sk_buff *beacon;
1151         int ret;
1152
1153         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1154                 vif->type != NL80211_IFTYPE_ADHOC);
1155
1156         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1157         if (!beacon)
1158                 return -ENOMEM;
1159
1160         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1161         dev_kfree_skb(beacon);
1162         return ret;
1163 }
1164
1165 struct iwl_mvm_mac_ap_iterator_data {
1166         struct iwl_mvm *mvm;
1167         struct ieee80211_vif *vif;
1168         u32 beacon_device_ts;
1169         u16 beacon_int;
1170 };
1171
1172 /* Find the beacon_device_ts and beacon_int for a managed interface */
1173 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1174                                     struct ieee80211_vif *vif)
1175 {
1176         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1177
1178         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1179                 return;
1180
1181         /* Station client has higher priority over P2P client*/
1182         if (vif->p2p && data->beacon_device_ts)
1183                 return;
1184
1185         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1186         data->beacon_int = vif->bss_conf.beacon_int;
1187 }
1188
1189 /*
1190  * Fill the specific data for mac context of type AP of P2P GO
1191  */
1192 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1193                                          struct ieee80211_vif *vif,
1194                                          struct iwl_mac_data_ap *ctxt_ap,
1195                                          bool add)
1196 {
1197         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1198         struct iwl_mvm_mac_ap_iterator_data data = {
1199                 .mvm = mvm,
1200                 .vif = vif,
1201                 .beacon_device_ts = 0
1202         };
1203
1204         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1205         ctxt_ap->bi_reciprocal =
1206                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1207         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1208                                              vif->bss_conf.dtim_period);
1209         ctxt_ap->dtim_reciprocal =
1210                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1211                                                vif->bss_conf.dtim_period));
1212
1213         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1214
1215         /*
1216          * Only set the beacon time when the MAC is being added, when we
1217          * just modify the MAC then we should keep the time -- the firmware
1218          * can otherwise have a "jumping" TBTT.
1219          */
1220         if (add) {
1221                 /*
1222                  * If there is a station/P2P client interface which is
1223                  * associated, set the AP's TBTT far enough from the station's
1224                  * TBTT. Otherwise, set it to the current system time
1225                  */
1226                 ieee80211_iterate_active_interfaces_atomic(
1227                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1228                         iwl_mvm_mac_ap_iterator, &data);
1229
1230                 if (data.beacon_device_ts) {
1231                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1232                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1233                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1234                                                      100);
1235                 } else {
1236                         mvmvif->ap_beacon_time =
1237                                 iwl_read_prph(mvm->trans,
1238                                               DEVICE_SYSTEM_TIME_REG);
1239                 }
1240         }
1241
1242         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1243         ctxt_ap->beacon_tsf = 0; /* unused */
1244
1245         /* TODO: Assume that the beacon id == mac context id */
1246         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1247 }
1248
1249 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1250                                    struct ieee80211_vif *vif,
1251                                    u32 action)
1252 {
1253         struct iwl_mac_ctx_cmd cmd = {};
1254
1255         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1256
1257         /* Fill the common data for all mac context types */
1258         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1259
1260         /* Fill the data specific for ap mode */
1261         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1262                                      action == FW_CTXT_ACTION_ADD);
1263
1264         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1265 }
1266
1267 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1268                                    struct ieee80211_vif *vif,
1269                                    u32 action)
1270 {
1271         struct iwl_mac_ctx_cmd cmd = {};
1272         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1273
1274         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1275
1276         /* Fill the common data for all mac context types */
1277         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1278
1279         /* Fill the data specific for GO mode */
1280         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1281                                      action == FW_CTXT_ACTION_ADD);
1282
1283         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1284                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1285         cmd.go.opp_ps_enabled =
1286                         cpu_to_le32(!!(noa->oppps_ctwindow &
1287                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1288
1289         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1290 }
1291
1292 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1293                                 u32 action, bool force_assoc_off,
1294                                 const u8 *bssid_override)
1295 {
1296         switch (vif->type) {
1297         case NL80211_IFTYPE_STATION:
1298                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1299                                                 force_assoc_off,
1300                                                 bssid_override);
1301                 break;
1302         case NL80211_IFTYPE_AP:
1303                 if (!vif->p2p)
1304                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1305                 else
1306                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1307                 break;
1308         case NL80211_IFTYPE_MONITOR:
1309                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1310         case NL80211_IFTYPE_P2P_DEVICE:
1311                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1312         case NL80211_IFTYPE_ADHOC:
1313                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1314         default:
1315                 break;
1316         }
1317
1318         return -EOPNOTSUPP;
1319 }
1320
1321 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1322 {
1323         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1324         int ret;
1325
1326         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1327                       vif->addr, ieee80211_vif_type_p2p(vif)))
1328                 return -EIO;
1329
1330         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1331                                    true, NULL);
1332         if (ret)
1333                 return ret;
1334
1335         /* will only do anything at resume from D3 time */
1336         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1337
1338         mvmvif->uploaded = true;
1339         return 0;
1340 }
1341
1342 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1343                              bool force_assoc_off, const u8 *bssid_override)
1344 {
1345         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1346
1347         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1348                       vif->addr, ieee80211_vif_type_p2p(vif)))
1349                 return -EIO;
1350
1351         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1352                                     force_assoc_off, bssid_override);
1353 }
1354
1355 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1356 {
1357         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1358         struct iwl_mac_ctx_cmd cmd;
1359         int ret;
1360
1361         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1362                       vif->addr, ieee80211_vif_type_p2p(vif)))
1363                 return -EIO;
1364
1365         memset(&cmd, 0, sizeof(cmd));
1366
1367         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1368                                                            mvmvif->color));
1369         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1370
1371         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1372                                    sizeof(cmd), &cmd);
1373         if (ret) {
1374                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1375                 return ret;
1376         }
1377
1378         mvmvif->uploaded = false;
1379
1380         if (vif->type == NL80211_IFTYPE_MONITOR) {
1381                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1382                 iwl_mvm_dealloc_snif_sta(mvm);
1383         }
1384
1385         return 0;
1386 }
1387
1388 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1389                                    struct ieee80211_vif *csa_vif, u32 gp2,
1390                                    bool tx_success)
1391 {
1392         struct iwl_mvm_vif *mvmvif =
1393                         iwl_mvm_vif_from_mac80211(csa_vif);
1394
1395         /* Don't start to countdown from a failed beacon */
1396         if (!tx_success && !mvmvif->csa_countdown)
1397                 return;
1398
1399         mvmvif->csa_countdown = true;
1400
1401         if (!ieee80211_csa_is_complete(csa_vif)) {
1402                 int c = ieee80211_csa_update_counter(csa_vif);
1403
1404                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1405                 if (csa_vif->p2p &&
1406                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1407                     tx_success) {
1408                         u32 rel_time = (c + 1) *
1409                                        csa_vif->bss_conf.beacon_int -
1410                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1411                         u32 apply_time = gp2 + rel_time * 1024;
1412
1413                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1414                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1415                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1416                                          apply_time);
1417                 }
1418         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1419                 /* we don't have CSA NoA scheduled yet, switch now */
1420                 ieee80211_csa_finish(csa_vif);
1421                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1422         }
1423 }
1424
1425 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1426                              struct iwl_rx_cmd_buffer *rxb)
1427 {
1428         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1429         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1430         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1431         struct ieee80211_vif *csa_vif;
1432         struct ieee80211_vif *tx_blocked_vif;
1433         u16 status;
1434
1435         lockdep_assert_held(&mvm->mutex);
1436
1437         beacon_notify_hdr = &beacon->beacon_notify_hdr;
1438         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1439
1440         status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK;
1441         IWL_DEBUG_RX(mvm,
1442                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1443                      status, beacon_notify_hdr->failure_frame,
1444                      le64_to_cpu(beacon->tsf),
1445                      mvm->ap_last_beacon_gp2,
1446                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1447
1448         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1449                                             lockdep_is_held(&mvm->mutex));
1450         if (unlikely(csa_vif && csa_vif->csa_active))
1451                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1452                                        (status == TX_STATUS_SUCCESS));
1453
1454         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1455                                                 lockdep_is_held(&mvm->mutex));
1456         if (unlikely(tx_blocked_vif)) {
1457                 struct iwl_mvm_vif *mvmvif =
1458                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1459
1460                 /*
1461                  * The channel switch is started and we have blocked the
1462                  * stations. If this is the first beacon (the timeout wasn't
1463                  * set), set the unblock timeout, otherwise countdown
1464                  */
1465                 if (!mvm->csa_tx_block_bcn_timeout)
1466                         mvm->csa_tx_block_bcn_timeout =
1467                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1468                 else
1469                         mvm->csa_tx_block_bcn_timeout--;
1470
1471                 /* Check if the timeout is expired, and unblock tx */
1472                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1473                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1474                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1475                 }
1476         }
1477 }
1478
1479 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1480                                          struct ieee80211_vif *vif)
1481 {
1482         struct iwl_missed_beacons_notif *missed_beacons = _data;
1483         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1484         struct iwl_mvm *mvm = mvmvif->mvm;
1485         struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1486         struct iwl_fw_dbg_trigger_tlv *trigger;
1487         u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1488         u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1489
1490         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1491                 return;
1492
1493         rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1494         rx_missed_bcon_since_rx =
1495                 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1496         /*
1497          * TODO: the threshold should be adjusted based on latency conditions,
1498          * and/or in case of a CS flow on one of the other AP vifs.
1499          */
1500         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1501              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1502                 ieee80211_beacon_loss(vif);
1503
1504         if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1505                                         FW_DBG_TRIGGER_MISSED_BEACONS))
1506                 return;
1507
1508         trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1509                                          FW_DBG_TRIGGER_MISSED_BEACONS);
1510         bcon_trig = (void *)trigger->data;
1511         stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1512         stop_trig_missed_bcon_since_rx =
1513                 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1514
1515         /* TODO: implement start trigger */
1516
1517         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger))
1518                 return;
1519
1520         if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1521             rx_missed_bcon >= stop_trig_missed_bcon)
1522                 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL);
1523 }
1524
1525 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1526                                      struct iwl_rx_cmd_buffer *rxb)
1527 {
1528         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1529         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1530
1531         IWL_DEBUG_INFO(mvm,
1532                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1533                        le32_to_cpu(mb->mac_id),
1534                        le32_to_cpu(mb->consec_missed_beacons),
1535                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1536                        le32_to_cpu(mb->num_recvd_beacons),
1537                        le32_to_cpu(mb->num_expected_beacons));
1538
1539         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1540                                                    IEEE80211_IFACE_ITER_NORMAL,
1541                                                    iwl_mvm_beacon_loss_iterator,
1542                                                    mb);
1543 }
1544
1545 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1546                                     struct iwl_rx_cmd_buffer *rxb)
1547 {
1548         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1549         struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1550         struct ieee80211_rx_status rx_status;
1551         struct sk_buff *skb;
1552         u32 size = le32_to_cpu(sb->byte_count);
1553
1554         if (size == 0)
1555                 return;
1556
1557         skb = alloc_skb(size, GFP_ATOMIC);
1558         if (!skb) {
1559                 IWL_ERR(mvm, "alloc_skb failed\n");
1560                 return;
1561         }
1562
1563         /* update rx_status according to the notification's metadata */
1564         memset(&rx_status, 0, sizeof(rx_status));
1565         rx_status.mactime = le64_to_cpu(sb->tsf);
1566         /* TSF as indicated by the firmware  is at INA time */
1567         rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1568         rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1569         rx_status.band =
1570                 (sb->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1571                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1572         rx_status.freq =
1573                 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1574                                                rx_status.band);
1575
1576         /* copy the data */
1577         memcpy(skb_put(skb, size), sb->data, size);
1578         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1579
1580         /* pass it as regular rx to mac80211 */
1581         ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1582 }
1583
1584 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1585                                       struct iwl_rx_cmd_buffer *rxb)
1586 {
1587         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1588         struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1589         struct ieee80211_vif *csa_vif;
1590         struct iwl_mvm_vif *mvmvif;
1591         int len = iwl_rx_packet_payload_len(pkt);
1592         u32 id_n_color;
1593
1594         if (WARN_ON_ONCE(len < sizeof(*notif)))
1595                 return;
1596
1597         rcu_read_lock();
1598
1599         csa_vif = rcu_dereference(mvm->csa_vif);
1600         if (WARN_ON(!csa_vif || !csa_vif->csa_active))
1601                 goto out_unlock;
1602
1603         id_n_color = le32_to_cpu(notif->id_and_color);
1604
1605         mvmvif = iwl_mvm_vif_from_mac80211(csa_vif);
1606         if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color,
1607                  "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1608                  FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color))
1609                 goto out_unlock;
1610
1611         IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1612
1613         queue_delayed_work(system_wq, &mvm->cs_tx_unblock_dwork,
1614                            msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1615                                             csa_vif->bss_conf.beacon_int));
1616
1617         ieee80211_csa_finish(csa_vif);
1618
1619         rcu_read_unlock();
1620
1621         RCU_INIT_POINTER(mvm->csa_vif, NULL);
1622
1623         return;
1624
1625 out_unlock:
1626         rcu_read_unlock();
1627 }