drivers/net/wireless/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 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.
  20  *
  21  * You should have received a copy of the GNU General Public License
  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
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <ilw@linux.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 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.
  46  *  * Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in
  48  *    the documentation and/or other materials provided with the
  49  *    distribution.
  50  *  * Neither the name Intel Corporation nor the names of its
  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
  76 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  77         IWL_MVM_TX_FIFO_VO,
  78         IWL_MVM_TX_FIFO_VI,
  79         IWL_MVM_TX_FIFO_BE,
  80         IWL_MVM_TX_FIFO_BK,
  81 };
  82
  83 struct iwl_mvm_mac_iface_iterator_data {
  84         struct iwl_mvm *mvm;
  85         struct ieee80211_vif *vif;
  86         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  87         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  88         enum iwl_tsf_id preferred_tsf;
  89         bool found_vif;
  90 };
  91
  92 struct iwl_mvm_hw_queues_iface_iterator_data {
  93         struct ieee80211_vif *exclude_vif;
  94         unsigned long used_hw_queues;
  95 };
  96
  97 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  98                                     struct ieee80211_vif *vif)
  99 {
 100         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 101         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 102         u16 min_bi;
 103
 104         /* Skip the interface for which we are trying to assign a tsf_id  */
 105         if (vif == data->vif)
 106                 return;
 107
 108         /*
 109          * The TSF is a hardware/firmware resource, there are 4 and
 110          * the driver should assign and free them as needed. However,
 111          * there are cases where 2 MACs should share the same TSF ID
 112          * for the purpose of clock sync, an optimization to avoid
 113          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 114          * client in the system.
 115          *
 116          * The firmware will decide according to the MAC type which
 117          * will be the master and slave. Clients that need to sync
 118          * with a remote station will be the master, and an AP or GO
 119          * will be the slave.
 120          *
 121          * Depending on the new interface type it can be slaved to
 122          * or become the master of an existing interface.
 123          */
 124         switch (data->vif->type) {
 125         case NL80211_IFTYPE_STATION:
 126                 /*
 127                  * The new interface is a client, so if the one we're iterating
 128                  * is an AP, and the beacon interval of the AP is a multiple or
 129                  * divisor of the beacon interval of the client, the same TSF
 130                  * should be used to avoid drift between the new client and
 131                  * existing AP. The existing AP will get drift updates from the
 132                  * new client context in this case.
 133                  */
 134                 if (vif->type != NL80211_IFTYPE_AP ||
 135                     data->preferred_tsf != NUM_TSF_IDS ||
 136                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 137                         break;
 138
 139                 min_bi = min(data->vif->bss_conf.beacon_int,
 140                              vif->bss_conf.beacon_int);
 141
 142                 if (!min_bi)
 143                         break;
 144
 145                 if ((data->vif->bss_conf.beacon_int -
 146                      vif->bss_conf.beacon_int) % min_bi == 0) {
 147                         data->preferred_tsf = mvmvif->tsf_id;
 148                         return;
 149                 }
 150                 break;
 151
 152         case NL80211_IFTYPE_AP:
 153                 /*
 154                  * The new interface is AP/GO, so if its beacon interval is a
 155                  * multiple or a divisor of the beacon interval of an existing
 156                  * interface, it should get drift updates from an existing
 157                  * client or use the same TSF as an existing GO. There's no
 158                  * drift between TSFs internally but if they used different
 159                  * TSFs then a new client MAC could update one of them and
 160                  * cause drift that way.
 161                  */
 162                 if ((vif->type != NL80211_IFTYPE_AP &&
 163                      vif->type != NL80211_IFTYPE_STATION) ||
 164                     data->preferred_tsf != NUM_TSF_IDS ||
 165                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 166                         break;
 167
 168                 min_bi = min(data->vif->bss_conf.beacon_int,
 169                              vif->bss_conf.beacon_int);
 170
 171                 if (!min_bi)
 172                         break;
 173
 174                 if ((data->vif->bss_conf.beacon_int -
 175                      vif->bss_conf.beacon_int) % min_bi == 0) {
 176                         data->preferred_tsf = mvmvif->tsf_id;
 177                         return;
 178                 }
 179                 break;
 180         default:
 181                 /*
 182                  * For all other interface types there's no need to
 183                  * take drift into account. Either they're exclusive
 184                  * like IBSS and monitor, or we don't care much about
 185                  * their TSF (like P2P Device), but we won't be able
 186                  * to share the TSF resource.
 187                  */
 188                 break;
 189         }
 190
 191         /*
 192          * Unless we exited above, we can't share the TSF resource
 193          * that the virtual interface we're iterating over is using
 194          * with the new one, so clear the available bit and if this
 195          * was the preferred one, reset that as well.
 196          */
 197         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 198
 199         if (data->preferred_tsf == mvmvif->tsf_id)
 200                 data->preferred_tsf = NUM_TSF_IDS;
 201 }
 202
 203 /*
 204  * Get the mask of the queues used by the vif
 205  */
 206 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
 207 {
 208         u32 qmask = 0, ac;
 209
 210         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 211                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 212
 213         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 214                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 215                         qmask |= BIT(vif->hw_queue[ac]);
 216         }
 217
 218         if (vif->type == NL80211_IFTYPE_AP)
 219                 qmask |= BIT(vif->cab_queue);
 220
 221         return qmask;
 222 }
 223
 224 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
 225                                          struct ieee80211_vif *vif)
 226 {
 227         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 228
 229         /* exclude the given vif */
 230         if (vif == data->exclude_vif)
 231                 return;
 232
 233         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 234 }
 235
 236 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data,
 237                                            struct ieee80211_sta *sta)
 238 {
 239         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 240         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 241
 242         /* Mark the queues used by the sta */
 243         data->used_hw_queues |= mvmsta->tfd_queue_msk;
 244 }
 245
 246 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 247                                          struct ieee80211_vif *exclude_vif)
 248 {
 249         u8 sta_id;
 250         struct iwl_mvm_hw_queues_iface_iterator_data data = {
 251                 .exclude_vif = exclude_vif,
 252                 .used_hw_queues =
 253                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 254                         BIT(mvm->aux_queue) |
 255                         BIT(IWL_MVM_CMD_QUEUE),
 256         };
 257
 258         lockdep_assert_held(&mvm->mutex);
 259
 260         /* mark all VIF used hw queues */
 261         ieee80211_iterate_active_interfaces_atomic(
 262                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 263                 iwl_mvm_iface_hw_queues_iter, &data);
 264
 265         /* don't assign the same hw queues as TDLS stations */
 266         ieee80211_iterate_stations_atomic(mvm->hw,
 267                                           iwl_mvm_mac_sta_hw_queues_iter,
 268                                           &data);
 269
 270         /*
 271          * Some TDLS stations may be removed but are in the process of being
 272          * drained. Don't touch their queues.
 273          */
 274         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT)
 275                 data.used_hw_queues |= mvm->tfd_drained[sta_id];
 276
 277         return data.used_hw_queues;
 278 }
 279
 280 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 281                                        struct ieee80211_vif *vif)
 282 {
 283         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 284         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 285
 286         /* Iterator may already find the interface being added -- skip it */
 287         if (vif == data->vif) {
 288                 data->found_vif = true;
 289                 return;
 290         }
 291
 292         /* Mark MAC IDs as used by clearing the available bit, and
 293          * (below) mark TSFs as used if their existing use is not
 294          * compatible with the new interface type.
 295          * No locking or atomic bit operations are needed since the
 296          * data is on the stack of the caller function.
 297          */
 298         __clear_bit(mvmvif->id, data->available_mac_ids);
 299
 300         /* find a suitable tsf_id */
 301         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 302 }
 303
 304 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 305                                     struct ieee80211_vif *vif)
 306 {
 307         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 308         struct iwl_mvm_mac_iface_iterator_data data = {
 309                 .mvm = mvm,
 310                 .vif = vif,
 311                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 312                 /* no preference yet */
 313                 .preferred_tsf = NUM_TSF_IDS,
 314         };
 315
 316         ieee80211_iterate_active_interfaces_atomic(
 317                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 318                 iwl_mvm_mac_tsf_id_iter, &data);
 319
 320         if (data.preferred_tsf != NUM_TSF_IDS)
 321                 mvmvif->tsf_id = data.preferred_tsf;
 322         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 323                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 324                                                 NUM_TSF_IDS);
 325 }
 326
 327 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 328                                                struct ieee80211_vif *vif)
 329 {
 330         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 331         struct iwl_mvm_mac_iface_iterator_data data = {
 332                 .mvm = mvm,
 333                 .vif = vif,
 334                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 335                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 336                 /* no preference yet */
 337                 .preferred_tsf = NUM_TSF_IDS,
 338                 .found_vif = false,
 339         };
 340         u32 ac;
 341         int ret, i;
 342         unsigned long used_hw_queues;
 343
 344         /*
 345          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 346          * and other resources.
 347          */
 348
 349         /*
 350          * Before the iterator, we start with all MAC IDs and TSFs available.
 351          *
 352          * During iteration, all MAC IDs are cleared that are in use by other
 353          * virtual interfaces, and all TSF IDs are cleared that can't be used
 354          * by this new virtual interface because they're used by an interface
 355          * that can't share it with the new one.
 356          * At the same time, we check if there's a preferred TSF in the case
 357          * that we should share it with another interface.
 358          */
 359
 360         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 361         switch (vif->type) {
 362         case NL80211_IFTYPE_ADHOC:
 363                 break;
 364         case NL80211_IFTYPE_STATION:
 365                 if (!vif->p2p)
 366                         break;
 367                 /* fall through */
 368         default:
 369                 __clear_bit(0, data.available_mac_ids);
 370         }
 371
 372         ieee80211_iterate_active_interfaces_atomic(
 373                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 374                 iwl_mvm_mac_iface_iterator, &data);
 375
 376         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
 377
 378         /*
 379          * In the case we're getting here during resume, it's similar to
 380          * firmware restart, and with RESUME_ALL the iterator will find
 381          * the vif being added already.
 382          * We don't want to reassign any IDs in either case since doing
 383          * so would probably assign different IDs (as interfaces aren't
 384          * necessarily added in the same order), but the old IDs were
 385          * preserved anyway, so skip ID assignment for both resume and
 386          * recovery.
 387          */
 388         if (data.found_vif)
 389                 return 0;
 390
 391         /* Therefore, in recovery, we can't get here */
 392         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 393                 return -EBUSY;
 394
 395         mvmvif->id = find_first_bit(data.available_mac_ids,
 396                                     NUM_MAC_INDEX_DRIVER);
 397         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 398                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 399                 ret = -EIO;
 400                 goto exit_fail;
 401         }
 402
 403         if (data.preferred_tsf != NUM_TSF_IDS)
 404                 mvmvif->tsf_id = data.preferred_tsf;
 405         else
 406                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 407                                                 NUM_TSF_IDS);
 408         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 409                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 410                 ret = -EIO;
 411                 goto exit_fail;
 412         }
 413
 414         mvmvif->color = 0;
 415
 416         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 417         mvmvif->time_event_data.id = TE_MAX;
 418
 419         /* No need to allocate data queues to P2P Device MAC.*/
 420         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 421                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 422                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 423
 424                 return 0;
 425         }
 426
 427         /* Find available queues, and allocate them to the ACs */
 428         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 429                 u8 queue = find_first_zero_bit(&used_hw_queues,
 430                                                mvm->first_agg_queue);
 431
 432                 if (queue >= mvm->first_agg_queue) {
 433                         IWL_ERR(mvm, "Failed to allocate queue\n");
 434                         ret = -EIO;
 435                         goto exit_fail;
 436                 }
 437
 438                 __set_bit(queue, &used_hw_queues);
 439                 vif->hw_queue[ac] = queue;
 440         }
 441
 442         /* Allocate the CAB queue for softAP and GO interfaces */
 443         if (vif->type == NL80211_IFTYPE_AP) {
 444                 u8 queue = find_first_zero_bit(&used_hw_queues,
 445                                                mvm->first_agg_queue);
 446
 447                 if (queue >= mvm->first_agg_queue) {
 448                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 449                         ret = -EIO;
 450                         goto exit_fail;
 451                 }
 452
 453                 vif->cab_queue = queue;
 454         } else {
 455                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 456         }
 457
 458         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 459         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 460
 461         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 462                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 463
 464         return 0;
 465
 466 exit_fail:
 467         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 468         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 469         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 470         return ret;
 471 }
 472
 473 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 474 {
 475         unsigned int wdg_timeout =
 476                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
 477         u32 ac;
 478         int ret;
 479
 480         lockdep_assert_held(&mvm->mutex);
 481
 482         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 483         if (ret)
 484                 return ret;
 485
 486         switch (vif->type) {
 487         case NL80211_IFTYPE_P2P_DEVICE:
 488                 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 489                                       IWL_MVM_OFFCHANNEL_QUEUE,
 490                                       IWL_MVM_TX_FIFO_VO, 0, wdg_timeout);
 491                 break;
 492         case NL80211_IFTYPE_AP:
 493                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue,
 494                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 495                 /* fall through */
 496         default:
 497                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 498                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 499                                               vif->hw_queue[ac],
 500                                               iwl_mvm_ac_to_tx_fifo[ac], 0,
 501                                               wdg_timeout);
 502                 break;
 503         }
 504
 505         return 0;
 506 }
 507
 508 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 509 {
 510         int ac;
 511
 512         lockdep_assert_held(&mvm->mutex);
 513
 514         switch (vif->type) {
 515         case NL80211_IFTYPE_P2P_DEVICE:
 516                 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 517                                     IWL_MVM_OFFCHANNEL_QUEUE, IWL_MAX_TID_COUNT,
 518                                     0);
 519                 break;
 520         case NL80211_IFTYPE_AP:
 521                 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
 522                                     IWL_MAX_TID_COUNT, 0);
 523                 /* fall through */
 524         default:
 525                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 526                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac],
 527                                             vif->hw_queue[ac],
 528                                             IWL_MAX_TID_COUNT, 0);
 529         }
 530 }
 531
 532 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 533                               struct ieee80211_vif *vif,
 534                               enum ieee80211_band band,
 535                               u8 *cck_rates, u8 *ofdm_rates)
 536 {
 537         struct ieee80211_supported_band *sband;
 538         unsigned long basic = vif->bss_conf.basic_rates;
 539         int lowest_present_ofdm = 100;
 540         int lowest_present_cck = 100;
 541         u8 cck = 0;
 542         u8 ofdm = 0;
 543         int i;
 544
 545         sband = mvm->hw->wiphy->bands[band];
 546
 547         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 548                 int hw = sband->bitrates[i].hw_value;
 549                 if (hw >= IWL_FIRST_OFDM_RATE) {
 550                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 551                         if (lowest_present_ofdm > hw)
 552                                 lowest_present_ofdm = hw;
 553                 } else {
 554                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 555
 556                         cck |= BIT(hw);
 557                         if (lowest_present_cck > hw)
 558                                 lowest_present_cck = hw;
 559                 }
 560         }
 561
 562         /*
 563          * Now we've got the basic rates as bitmaps in the ofdm and cck
 564          * variables. This isn't sufficient though, as there might not
 565          * be all the right rates in the bitmap. E.g. if the only basic
 566          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 567          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 568          *
 569          *    [...] a STA responding to a received frame shall transmit
 570          *    its Control Response frame [...] at the highest rate in the
 571          *    BSSBasicRateSet parameter that is less than or equal to the
 572          *    rate of the immediately previous frame in the frame exchange
 573          *    sequence ([...]) and that is of the same modulation class
 574          *    ([...]) as the received frame. If no rate contained in the
 575          *    BSSBasicRateSet parameter meets these conditions, then the
 576          *    control frame sent in response to a received frame shall be
 577          *    transmitted at the highest mandatory rate of the PHY that is
 578          *    less than or equal to the rate of the received frame, and
 579          *    that is of the same modulation class as the received frame.
 580          *
 581          * As a consequence, we need to add all mandatory rates that are
 582          * lower than all of the basic rates to these bitmaps.
 583          */
 584
 585         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 586                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 587         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 588                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 589         /* 6M already there or needed so always add */
 590         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 591
 592         /*
 593          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 594          * Note, however:
 595          *  - if no CCK rates are basic, it must be ERP since there must
 596          *    be some basic rates at all, so they're OFDM => ERP PHY
 597          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 598          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 599          *  - if 5.5M is basic, 1M and 2M are mandatory
 600          *  - if 2M is basic, 1M is mandatory
 601          *  - if 1M is basic, that's the only valid ACK rate.
 602          * As a consequence, it's not as complicated as it sounds, just add
 603          * any lower rates to the ACK rate bitmap.
 604          */
 605         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 606                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 607         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 608                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 609         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 610                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 611         /* 1M already there or needed so always add */
 612         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 613
 614         *cck_rates = cck;
 615         *ofdm_rates = ofdm;
 616 }
 617
 618 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 619                                          struct ieee80211_vif *vif,
 620                                          struct iwl_mac_ctx_cmd *cmd)
 621 {
 622         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 623         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 624                                  IEEE80211_HT_OP_MODE_PROTECTION;
 625         /* The fw does not distinguish between ht and fat */
 626         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 627
 628         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 629         /*
 630          * See section 9.23.3.1 of IEEE 80211-2012.
 631          * Nongreenfield HT STAs Present is not supported.
 632          */
 633         switch (protection_mode) {
 634         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 635                 break;
 636         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 637         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 638                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 639                 break;
 640         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 641                 /* Protect when channel wider than 20MHz */
 642                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 643                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 644                 break;
 645         default:
 646                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 647                         protection_mode);
 648                 break;
 649         }
 650 }
 651
 652 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 653                                         struct ieee80211_vif *vif,
 654                                         struct iwl_mac_ctx_cmd *cmd,
 655                                         const u8 *bssid_override,
 656                                         u32 action)
 657 {
 658         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 659         struct ieee80211_chanctx_conf *chanctx;
 660         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 661                              IEEE80211_HT_OP_MODE_PROTECTION);
 662         u8 cck_ack_rates, ofdm_ack_rates;
 663         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 664         int i;
 665
 666         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 667                                                             mvmvif->color));
 668         cmd->action = cpu_to_le32(action);
 669
 670         switch (vif->type) {
 671         case NL80211_IFTYPE_STATION:
 672                 if (vif->p2p)
 673                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 674                 else
 675                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 676                 break;
 677         case NL80211_IFTYPE_AP:
 678                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 679                 break;
 680         case NL80211_IFTYPE_MONITOR:
 681                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 682                 break;
 683         case NL80211_IFTYPE_P2P_DEVICE:
 684                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 685                 break;
 686         case NL80211_IFTYPE_ADHOC:
 687                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 688                 break;
 689         default:
 690                 WARN_ON_ONCE(1);
 691         }
 692
 693         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 694
 695         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 696
 697         if (bssid)
 698                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 699         else
 700                 eth_broadcast_addr(cmd->bssid_addr);
 701
 702         rcu_read_lock();
 703         chanctx = rcu_dereference(vif->chanctx_conf);
 704         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 705                                             : IEEE80211_BAND_2GHZ,
 706                           &cck_ack_rates, &ofdm_ack_rates);
 707         rcu_read_unlock();
 708
 709         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 710         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 711
 712         cmd->cck_short_preamble =
 713                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 714                             MAC_FLG_SHORT_PREAMBLE : 0);
 715         cmd->short_slot =
 716                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 717                             MAC_FLG_SHORT_SLOT : 0);
 718
 719         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 720                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 721
 722                 cmd->ac[txf].cw_min =
 723                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 724                 cmd->ac[txf].cw_max =
 725                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 726                 cmd->ac[txf].edca_txop =
 727                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 728                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 729                 cmd->ac[txf].fifos_mask = BIT(txf);
 730         }
 731
 732         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 733         if (vif->type == NL80211_IFTYPE_AP)
 734                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 735                         BIT(IWL_MVM_TX_FIFO_MCAST);
 736
 737         if (vif->bss_conf.qos)
 738                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 739
 740         if (vif->bss_conf.use_cts_prot)
 741                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 742
 743         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 744                        vif->bss_conf.use_cts_prot,
 745                        vif->bss_conf.ht_operation_mode);
 746         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 747                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 748         if (ht_enabled)
 749                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 750
 751         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 752 }
 753
 754 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 755                                      struct iwl_mac_ctx_cmd *cmd)
 756 {
 757         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 758                                        sizeof(*cmd), cmd);
 759         if (ret)
 760                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 761                         le32_to_cpu(cmd->action), ret);
 762         return ret;
 763 }
 764
 765 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 766                                     struct ieee80211_vif *vif,
 767                                     u32 action, bool force_assoc_off,
 768                                     const u8 *bssid_override)
 769 {
 770         struct iwl_mac_ctx_cmd cmd = {};
 771         struct iwl_mac_data_sta *ctxt_sta;
 772
 773         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 774
 775         /* Fill the common data for all mac context types */
 776         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 777
 778         if (vif->p2p) {
 779                 struct ieee80211_p2p_noa_attr *noa =
 780                         &vif->bss_conf.p2p_noa_attr;
 781
 782                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 783                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 784                 ctxt_sta = &cmd.p2p_sta.sta;
 785         } else {
 786                 ctxt_sta = &cmd.sta;
 787         }
 788
 789         /* We need the dtim_period to set the MAC as associated */
 790         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 791             !force_assoc_off) {
 792                 u32 dtim_offs;
 793
 794                 /*
 795                  * The DTIM count counts down, so when it is N that means N
 796                  * more beacon intervals happen until the DTIM TBTT. Therefore
 797                  * add this to the current time. If that ends up being in the
 798                  * future, the firmware will handle it.
 799                  *
 800                  * Also note that the system_timestamp (which we get here as
 801                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 802                  * same offset in the frame -- the TSF is at the first symbol
 803                  * of the TSF, the system timestamp is at signal acquisition
 804                  * time. This means there's an offset between them of at most
 805                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 806                  * 384us in the longest case), this is currently not relevant
 807                  * as the firmware wakes up around 2ms before the TBTT.
 808                  */
 809                 dtim_offs = vif->bss_conf.sync_dtim_count *
 810                                 vif->bss_conf.beacon_int;
 811                 /* convert TU to usecs */
 812                 dtim_offs *= 1024;
 813
 814                 ctxt_sta->dtim_tsf =
 815                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 816                 ctxt_sta->dtim_time =
 817                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 818
 819                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 820                                le64_to_cpu(ctxt_sta->dtim_tsf),
 821                                le32_to_cpu(ctxt_sta->dtim_time),
 822                                dtim_offs);
 823
 824                 ctxt_sta->is_assoc = cpu_to_le32(1);
 825         } else {
 826                 ctxt_sta->is_assoc = cpu_to_le32(0);
 827
 828                 /* Allow beacons to pass through as long as we are not
 829                  * associated, or we do not have dtim period information.
 830                  */
 831                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 832         }
 833
 834         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 835         ctxt_sta->bi_reciprocal =
 836                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 837         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 838                                               vif->bss_conf.dtim_period);
 839         ctxt_sta->dtim_reciprocal =
 840                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 841                                                vif->bss_conf.dtim_period));
 842
 843         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 844         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 845
 846         if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 847                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 848
 849         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 850 }
 851
 852 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 853                                          struct ieee80211_vif *vif,
 854                                          u32 action)
 855 {
 856         struct iwl_mac_ctx_cmd cmd = {};
 857
 858         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 859
 860         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 861
 862         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 863                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 864                                        MAC_FILTER_IN_BEACON |
 865                                        MAC_FILTER_IN_PROBE_REQUEST |
 866                                        MAC_FILTER_IN_CRC32);
 867         ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 868
 869         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 870 }
 871
 872 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 873                                      struct ieee80211_vif *vif,
 874                                      u32 action)
 875 {
 876         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 877         struct iwl_mac_ctx_cmd cmd = {};
 878
 879         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 880
 881         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 882
 883         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 884                                        MAC_FILTER_IN_PROBE_REQUEST);
 885
 886         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 887         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 888         cmd.ibss.bi_reciprocal =
 889                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 890
 891         /* TODO: Assumes that the beacon id == mac context id */
 892         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 893
 894         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 895 }
 896
 897 struct iwl_mvm_go_iterator_data {
 898         bool go_active;
 899 };
 900
 901 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 902 {
 903         struct iwl_mvm_go_iterator_data *data = _data;
 904         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 905
 906         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 907             mvmvif->ap_ibss_active)
 908                 data->go_active = true;
 909 }
 910
 911 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 912                                            struct ieee80211_vif *vif,
 913                                            u32 action)
 914 {
 915         struct iwl_mac_ctx_cmd cmd = {};
 916         struct iwl_mvm_go_iterator_data data = {};
 917
 918         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 919
 920         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 921
 922         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 923
 924         /* Override the filter flags to accept only probe requests */
 925         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 926
 927         /*
 928          * This flag should be set to true when the P2P Device is
 929          * discoverable and there is at least another active P2P GO. Settings
 930          * this flag will allow the P2P Device to be discoverable on other
 931          * channels in addition to its listen channel.
 932          * Note that this flag should not be set in other cases as it opens the
 933          * Rx filters on all MAC and increases the number of interrupts.
 934          */
 935         ieee80211_iterate_active_interfaces_atomic(
 936                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 937                 iwl_mvm_go_iterator, &data);
 938
 939         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 940         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 941 }
 942
 943 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 944                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 945                                      u8 *beacon, u32 frame_size)
 946 {
 947         u32 tim_idx;
 948         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 949
 950         /* The index is relative to frame start but we start looking at the
 951          * variable-length part of the beacon. */
 952         tim_idx = mgmt->u.beacon.variable - beacon;
 953
 954         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 955         while ((tim_idx < (frame_size - 2)) &&
 956                         (beacon[tim_idx] != WLAN_EID_TIM))
 957                 tim_idx += beacon[tim_idx+1] + 2;
 958
 959         /* If TIM field was found, set variables */
 960         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 961                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 962                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 963         } else {
 964                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 965         }
 966 }
 967
 968 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 969                                         struct ieee80211_vif *vif,
 970                                         struct sk_buff *beacon)
 971 {
 972         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 973         struct iwl_host_cmd cmd = {
 974                 .id = BEACON_TEMPLATE_CMD,
 975                 .flags = CMD_ASYNC,
 976         };
 977         struct iwl_mac_beacon_cmd beacon_cmd = {};
 978         struct ieee80211_tx_info *info;
 979         u32 beacon_skb_len;
 980         u32 rate, tx_flags;
 981
 982         if (WARN_ON(!beacon))
 983                 return -EINVAL;
 984
 985         beacon_skb_len = beacon->len;
 986
 987         /* TODO: for now the beacon template id is set to be the mac context id.
 988          * Might be better to handle it as another resource ... */
 989         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 990         info = IEEE80211_SKB_CB(beacon);
 991
 992         /* Set up TX command fields */
 993         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 994         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 995         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 996         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 997         tx_flags |=
 998                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 999                                                 TX_CMD_FLG_BT_PRIO_POS;
1000         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
1001
1002         mvm->mgmt_last_antenna_idx =
1003                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
1004                                      mvm->mgmt_last_antenna_idx);
1005
1006         beacon_cmd.tx.rate_n_flags =
1007                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
1008                             RATE_MCS_ANT_POS);
1009
1010         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
1011                 rate = IWL_FIRST_OFDM_RATE;
1012         } else {
1013                 rate = IWL_FIRST_CCK_RATE;
1014                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
1015         }
1016         beacon_cmd.tx.rate_n_flags |=
1017                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
1018
1019         /* Set up TX beacon command fields */
1020         if (vif->type == NL80211_IFTYPE_AP)
1021                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
1022                                          beacon->data,
1023                                          beacon_skb_len);
1024
1025         /* Submit command */
1026         cmd.len[0] = sizeof(beacon_cmd);
1027         cmd.data[0] = &beacon_cmd;
1028         cmd.dataflags[0] = 0;
1029         cmd.len[1] = beacon_skb_len;
1030         cmd.data[1] = beacon->data;
1031         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
1032
1033         return iwl_mvm_send_cmd(mvm, &cmd);
1034 }
1035
1036 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1037 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1038                                     struct ieee80211_vif *vif)
1039 {
1040         struct sk_buff *beacon;
1041         int ret;
1042
1043         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1044                 vif->type != NL80211_IFTYPE_ADHOC);
1045
1046         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1047         if (!beacon)
1048                 return -ENOMEM;
1049
1050         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1051         dev_kfree_skb(beacon);
1052         return ret;
1053 }
1054
1055 struct iwl_mvm_mac_ap_iterator_data {
1056         struct iwl_mvm *mvm;
1057         struct ieee80211_vif *vif;
1058         u32 beacon_device_ts;
1059         u16 beacon_int;
1060 };
1061
1062 /* Find the beacon_device_ts and beacon_int for a managed interface */
1063 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1064                                     struct ieee80211_vif *vif)
1065 {
1066         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1067
1068         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1069                 return;
1070
1071         /* Station client has higher priority over P2P client*/
1072         if (vif->p2p && data->beacon_device_ts)
1073                 return;
1074
1075         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1076         data->beacon_int = vif->bss_conf.beacon_int;
1077 }
1078
1079 /*
1080  * Fill the specific data for mac context of type AP of P2P GO
1081  */
1082 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1083                                          struct ieee80211_vif *vif,
1084                                          struct iwl_mac_data_ap *ctxt_ap,
1085                                          bool add)
1086 {
1087         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1088         struct iwl_mvm_mac_ap_iterator_data data = {
1089                 .mvm = mvm,
1090                 .vif = vif,
1091                 .beacon_device_ts = 0
1092         };
1093
1094         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1095         ctxt_ap->bi_reciprocal =
1096                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1097         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1098                                              vif->bss_conf.dtim_period);
1099         ctxt_ap->dtim_reciprocal =
1100                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1101                                                vif->bss_conf.dtim_period));
1102
1103         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1104
1105         /*
1106          * Only set the beacon time when the MAC is being added, when we
1107          * just modify the MAC then we should keep the time -- the firmware
1108          * can otherwise have a "jumping" TBTT.
1109          */
1110         if (add) {
1111                 /*
1112                  * If there is a station/P2P client interface which is
1113                  * associated, set the AP's TBTT far enough from the station's
1114                  * TBTT. Otherwise, set it to the current system time
1115                  */
1116                 ieee80211_iterate_active_interfaces_atomic(
1117                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1118                         iwl_mvm_mac_ap_iterator, &data);
1119
1120                 if (data.beacon_device_ts) {
1121                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1122                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1123                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1124                                                      100);
1125                 } else {
1126                         mvmvif->ap_beacon_time =
1127                                 iwl_read_prph(mvm->trans,
1128                                               DEVICE_SYSTEM_TIME_REG);
1129                 }
1130         }
1131
1132         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1133         ctxt_ap->beacon_tsf = 0; /* unused */
1134
1135         /* TODO: Assume that the beacon id == mac context id */
1136         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1137 }
1138
1139 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1140                                    struct ieee80211_vif *vif,
1141                                    u32 action)
1142 {
1143         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1144         struct iwl_mac_ctx_cmd cmd = {};
1145
1146         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1147
1148         /* Fill the common data for all mac context types */
1149         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1150
1151         /*
1152          * pass probe requests and beacons from other APs (needed
1153          * for ht protection); when there're no any associated station
1154          * don't ask FW to pass beacons to prevent unnecessary wake-ups.
1155          */
1156         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1157         if (mvmvif->ap_assoc_sta_count) {
1158                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1159                 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1160         } else {
1161                 IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1162         }
1163
1164         /* Fill the data specific for ap mode */
1165         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1166                                      action == FW_CTXT_ACTION_ADD);
1167
1168         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1169 }
1170
1171 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1172                                    struct ieee80211_vif *vif,
1173                                    u32 action)
1174 {
1175         struct iwl_mac_ctx_cmd cmd = {};
1176         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1177
1178         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1179
1180         /* Fill the common data for all mac context types */
1181         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1182
1183         /*
1184          * pass probe requests and beacons from other APs (needed
1185          * for ht protection)
1186          */
1187         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1188                                         MAC_FILTER_IN_BEACON);
1189
1190         /* Fill the data specific for GO mode */
1191         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1192                                      action == FW_CTXT_ACTION_ADD);
1193
1194         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1195                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1196         cmd.go.opp_ps_enabled =
1197                         cpu_to_le32(!!(noa->oppps_ctwindow &
1198                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1199
1200         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1201 }
1202
1203 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1204                                 u32 action, bool force_assoc_off,
1205                                 const u8 *bssid_override)
1206 {
1207         switch (vif->type) {
1208         case NL80211_IFTYPE_STATION:
1209                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1210                                                 force_assoc_off,
1211                                                 bssid_override);
1212                 break;
1213         case NL80211_IFTYPE_AP:
1214                 if (!vif->p2p)
1215                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1216                 else
1217                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1218                 break;
1219         case NL80211_IFTYPE_MONITOR:
1220                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1221         case NL80211_IFTYPE_P2P_DEVICE:
1222                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1223         case NL80211_IFTYPE_ADHOC:
1224                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1225         default:
1226                 break;
1227         }
1228
1229         return -EOPNOTSUPP;
1230 }
1231
1232 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1233 {
1234         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1235         int ret;
1236
1237         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1238                       vif->addr, ieee80211_vif_type_p2p(vif)))
1239                 return -EIO;
1240
1241         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1242                                    true, NULL);
1243         if (ret)
1244                 return ret;
1245
1246         /* will only do anything at resume from D3 time */
1247         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1248
1249         mvmvif->uploaded = true;
1250         return 0;
1251 }
1252
1253 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1254                              bool force_assoc_off, const u8 *bssid_override)
1255 {
1256         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1257
1258         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1259                       vif->addr, ieee80211_vif_type_p2p(vif)))
1260                 return -EIO;
1261
1262         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1263                                     force_assoc_off, bssid_override);
1264 }
1265
1266 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1267 {
1268         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1269         struct iwl_mac_ctx_cmd cmd;
1270         int ret;
1271
1272         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1273                       vif->addr, ieee80211_vif_type_p2p(vif)))
1274                 return -EIO;
1275
1276         memset(&cmd, 0, sizeof(cmd));
1277
1278         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1279                                                            mvmvif->color));
1280         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1281
1282         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1283                                    sizeof(cmd), &cmd);
1284         if (ret) {
1285                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1286                 return ret;
1287         }
1288
1289         mvmvif->uploaded = false;
1290
1291         if (vif->type == NL80211_IFTYPE_MONITOR)
1292                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1293
1294         return 0;
1295 }
1296
1297 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1298                                    struct ieee80211_vif *csa_vif, u32 gp2,
1299                                    bool tx_success)
1300 {
1301         struct iwl_mvm_vif *mvmvif =
1302                         iwl_mvm_vif_from_mac80211(csa_vif);
1303
1304         /* Don't start to countdown from a failed beacon */
1305         if (!tx_success && !mvmvif->csa_countdown)
1306                 return;
1307
1308         mvmvif->csa_countdown = true;
1309
1310         if (!ieee80211_csa_is_complete(csa_vif)) {
1311                 int c = ieee80211_csa_update_counter(csa_vif);
1312
1313                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1314                 if (csa_vif->p2p &&
1315                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1316                     tx_success) {
1317                         u32 rel_time = (c + 1) *
1318                                        csa_vif->bss_conf.beacon_int -
1319                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1320                         u32 apply_time = gp2 + rel_time * 1024;
1321
1322                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1323                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1324                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1325                                          apply_time);
1326                 }
1327         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1328                 /* we don't have CSA NoA scheduled yet, switch now */
1329                 ieee80211_csa_finish(csa_vif);
1330                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1331         }
1332 }
1333
1334 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1335                              struct iwl_rx_cmd_buffer *rxb)
1336 {
1337         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1338         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1339         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1340         struct ieee80211_vif *csa_vif;
1341         struct ieee80211_vif *tx_blocked_vif;
1342         u16 status;
1343
1344         lockdep_assert_held(&mvm->mutex);
1345
1346         beacon_notify_hdr = &beacon->beacon_notify_hdr;
1347         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1348
1349         status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK;
1350         IWL_DEBUG_RX(mvm,
1351                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1352                      status, beacon_notify_hdr->failure_frame,
1353                      le64_to_cpu(beacon->tsf),
1354                      mvm->ap_last_beacon_gp2,
1355                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1356
1357         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1358                                             lockdep_is_held(&mvm->mutex));
1359         if (unlikely(csa_vif && csa_vif->csa_active))
1360                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1361                                        (status == TX_STATUS_SUCCESS));
1362
1363         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1364                                                 lockdep_is_held(&mvm->mutex));
1365         if (unlikely(tx_blocked_vif)) {
1366                 struct iwl_mvm_vif *mvmvif =
1367                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1368
1369                 /*
1370                  * The channel switch is started and we have blocked the
1371                  * stations. If this is the first beacon (the timeout wasn't
1372                  * set), set the unblock timeout, otherwise countdown
1373                  */
1374                 if (!mvm->csa_tx_block_bcn_timeout)
1375                         mvm->csa_tx_block_bcn_timeout =
1376                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1377                 else
1378                         mvm->csa_tx_block_bcn_timeout--;
1379
1380                 /* Check if the timeout is expired, and unblock tx */
1381                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1382                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1383                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1384                 }
1385         }
1386 }
1387
1388 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1389                                          struct ieee80211_vif *vif)
1390 {
1391         struct iwl_missed_beacons_notif *missed_beacons = _data;
1392         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1393         struct iwl_mvm *mvm = mvmvif->mvm;
1394         struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1395         struct iwl_fw_dbg_trigger_tlv *trigger;
1396         u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1397         u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1398
1399         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1400                 return;
1401
1402         rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1403         rx_missed_bcon_since_rx =
1404                 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1405         /*
1406          * TODO: the threshold should be adjusted based on latency conditions,
1407          * and/or in case of a CS flow on one of the other AP vifs.
1408          */
1409         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1410              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1411                 ieee80211_beacon_loss(vif);
1412
1413         if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1414                                         FW_DBG_TRIGGER_MISSED_BEACONS))
1415                 return;
1416
1417         trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1418                                          FW_DBG_TRIGGER_MISSED_BEACONS);
1419         bcon_trig = (void *)trigger->data;
1420         stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1421         stop_trig_missed_bcon_since_rx =
1422                 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1423
1424         /* TODO: implement start trigger */
1425
1426         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger))
1427                 return;
1428
1429         if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1430             rx_missed_bcon >= stop_trig_missed_bcon)
1431                 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL);
1432 }
1433
1434 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1435                                      struct iwl_rx_cmd_buffer *rxb)
1436 {
1437         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1438         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1439
1440         IWL_DEBUG_INFO(mvm,
1441                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1442                        le32_to_cpu(mb->mac_id),
1443                        le32_to_cpu(mb->consec_missed_beacons),
1444                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1445                        le32_to_cpu(mb->num_recvd_beacons),
1446                        le32_to_cpu(mb->num_expected_beacons));
1447
1448         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1449                                                    IEEE80211_IFACE_ITER_NORMAL,
1450                                                    iwl_mvm_beacon_loss_iterator,
1451                                                    mb);
1452 }