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                 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 505                                       IWL_MVM_OFFCHANNEL_QUEUE,
 506                                       IWL_MVM_TX_FIFO_VO, 0, wdg_timeout);
 507                 break;
 508         case NL80211_IFTYPE_AP:
 509                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue,
 510                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 511                 /* fall through */
 512         default:
 513                 /* If DQA is supported - queues will be enabled when needed */
 514                 if (iwl_mvm_is_dqa_supported(mvm))
 515                         break;
 516
 517                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 518                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 519                                               vif->hw_queue[ac],
 520                                               iwl_mvm_ac_to_tx_fifo[ac], 0,
 521                                               wdg_timeout);
 522                 break;
 523         }
 524
 525         return 0;
 526 }
 527
 528 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 529 {
 530         int ac;
 531
 532         lockdep_assert_held(&mvm->mutex);
 533
 534         switch (vif->type) {
 535         case NL80211_IFTYPE_P2P_DEVICE:
 536                 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 537                                     IWL_MVM_OFFCHANNEL_QUEUE, IWL_MAX_TID_COUNT,
 538                                     0);
 539                 break;
 540         case NL80211_IFTYPE_AP:
 541                 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
 542                                     IWL_MAX_TID_COUNT, 0);
 543                 /* fall through */
 544         default:
 545                 /*
 546                  * If DQA is supported - queues were already disabled, since in
 547                  * DQA-mode the queues are a property of the STA and not of the
 548                  * vif, and at this point the STA was already deleted
 549                  */
 550                 if (iwl_mvm_is_dqa_supported(mvm))
 551                         break;
 552
 553                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 554                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac],
 555                                             vif->hw_queue[ac],
 556                                             IWL_MAX_TID_COUNT, 0);
 557         }
 558 }
 559
 560 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 561                               struct ieee80211_vif *vif,
 562                               enum nl80211_band band,
 563                               u8 *cck_rates, u8 *ofdm_rates)
 564 {
 565         struct ieee80211_supported_band *sband;
 566         unsigned long basic = vif->bss_conf.basic_rates;
 567         int lowest_present_ofdm = 100;
 568         int lowest_present_cck = 100;
 569         u8 cck = 0;
 570         u8 ofdm = 0;
 571         int i;
 572
 573         sband = mvm->hw->wiphy->bands[band];
 574
 575         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 576                 int hw = sband->bitrates[i].hw_value;
 577                 if (hw >= IWL_FIRST_OFDM_RATE) {
 578                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 579                         if (lowest_present_ofdm > hw)
 580                                 lowest_present_ofdm = hw;
 581                 } else {
 582                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 583
 584                         cck |= BIT(hw);
 585                         if (lowest_present_cck > hw)
 586                                 lowest_present_cck = hw;
 587                 }
 588         }
 589
 590         /*
 591          * Now we've got the basic rates as bitmaps in the ofdm and cck
 592          * variables. This isn't sufficient though, as there might not
 593          * be all the right rates in the bitmap. E.g. if the only basic
 594          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 595          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 596          *
 597          *    [...] a STA responding to a received frame shall transmit
 598          *    its Control Response frame [...] at the highest rate in the
 599          *    BSSBasicRateSet parameter that is less than or equal to the
 600          *    rate of the immediately previous frame in the frame exchange
 601          *    sequence ([...]) and that is of the same modulation class
 602          *    ([...]) as the received frame. If no rate contained in the
 603          *    BSSBasicRateSet parameter meets these conditions, then the
 604          *    control frame sent in response to a received frame shall be
 605          *    transmitted at the highest mandatory rate of the PHY that is
 606          *    less than or equal to the rate of the received frame, and
 607          *    that is of the same modulation class as the received frame.
 608          *
 609          * As a consequence, we need to add all mandatory rates that are
 610          * lower than all of the basic rates to these bitmaps.
 611          */
 612
 613         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 614                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 615         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 616                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 617         /* 6M already there or needed so always add */
 618         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 619
 620         /*
 621          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 622          * Note, however:
 623          *  - if no CCK rates are basic, it must be ERP since there must
 624          *    be some basic rates at all, so they're OFDM => ERP PHY
 625          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 626          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 627          *  - if 5.5M is basic, 1M and 2M are mandatory
 628          *  - if 2M is basic, 1M is mandatory
 629          *  - if 1M is basic, that's the only valid ACK rate.
 630          * As a consequence, it's not as complicated as it sounds, just add
 631          * any lower rates to the ACK rate bitmap.
 632          */
 633         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 634                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 635         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 636                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 637         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 638                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 639         /* 1M already there or needed so always add */
 640         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 641
 642         *cck_rates = cck;
 643         *ofdm_rates = ofdm;
 644 }
 645
 646 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 647                                          struct ieee80211_vif *vif,
 648                                          struct iwl_mac_ctx_cmd *cmd)
 649 {
 650         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 651         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 652                                  IEEE80211_HT_OP_MODE_PROTECTION;
 653         /* The fw does not distinguish between ht and fat */
 654         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 655
 656         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 657         /*
 658          * See section 9.23.3.1 of IEEE 80211-2012.
 659          * Nongreenfield HT STAs Present is not supported.
 660          */
 661         switch (protection_mode) {
 662         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 663                 break;
 664         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 665         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 666                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 667                 break;
 668         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 669                 /* Protect when channel wider than 20MHz */
 670                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 671                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 672                 break;
 673         default:
 674                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 675                         protection_mode);
 676                 break;
 677         }
 678 }
 679
 680 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 681                                         struct ieee80211_vif *vif,
 682                                         struct iwl_mac_ctx_cmd *cmd,
 683                                         const u8 *bssid_override,
 684                                         u32 action)
 685 {
 686         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 687         struct ieee80211_chanctx_conf *chanctx;
 688         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 689                              IEEE80211_HT_OP_MODE_PROTECTION);
 690         u8 cck_ack_rates, ofdm_ack_rates;
 691         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 692         int i;
 693
 694         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 695                                                             mvmvif->color));
 696         cmd->action = cpu_to_le32(action);
 697
 698         switch (vif->type) {
 699         case NL80211_IFTYPE_STATION:
 700                 if (vif->p2p)
 701                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 702                 else
 703                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 704                 break;
 705         case NL80211_IFTYPE_AP:
 706                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 707                 break;
 708         case NL80211_IFTYPE_MONITOR:
 709                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 710                 break;
 711         case NL80211_IFTYPE_P2P_DEVICE:
 712                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 713                 break;
 714         case NL80211_IFTYPE_ADHOC:
 715                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 716                 break;
 717         default:
 718                 WARN_ON_ONCE(1);
 719         }
 720
 721         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 722
 723         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 724
 725         if (bssid)
 726                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 727         else
 728                 eth_broadcast_addr(cmd->bssid_addr);
 729
 730         rcu_read_lock();
 731         chanctx = rcu_dereference(vif->chanctx_conf);
 732         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 733                                             : NL80211_BAND_2GHZ,
 734                           &cck_ack_rates, &ofdm_ack_rates);
 735         rcu_read_unlock();
 736
 737         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 738         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 739
 740         cmd->cck_short_preamble =
 741                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 742                             MAC_FLG_SHORT_PREAMBLE : 0);
 743         cmd->short_slot =
 744                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 745                             MAC_FLG_SHORT_SLOT : 0);
 746
 747         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 748
 749         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 750                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 751
 752                 cmd->ac[txf].cw_min =
 753                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 754                 cmd->ac[txf].cw_max =
 755                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 756                 cmd->ac[txf].edca_txop =
 757                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 758                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 759                 cmd->ac[txf].fifos_mask = BIT(txf);
 760         }
 761
 762         if (vif->type == NL80211_IFTYPE_AP) {
 763                 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 764                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 765                         BIT(IWL_MVM_TX_FIFO_MCAST);
 766
 767                 /*
 768                  * in AP mode, pass probe requests and beacons from other APs
 769                  * (needed for ht protection); when there're no any associated
 770                  * station don't ask FW to pass beacons to prevent unnecessary
 771                  * wake-ups.
 772                  */
 773                 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 774                 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
 775                         cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 776                         IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
 777                 } else {
 778                         IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
 779                 }
 780         }
 781
 782         if (vif->bss_conf.qos)
 783                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 784
 785         if (vif->bss_conf.use_cts_prot)
 786                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 787
 788         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 789                        vif->bss_conf.use_cts_prot,
 790                        vif->bss_conf.ht_operation_mode);
 791         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 792                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 793         if (ht_enabled)
 794                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 795 }
 796
 797 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 798                                      struct iwl_mac_ctx_cmd *cmd)
 799 {
 800         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 801                                        sizeof(*cmd), cmd);
 802         if (ret)
 803                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 804                         le32_to_cpu(cmd->action), ret);
 805         return ret;
 806 }
 807
 808 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 809                                     struct ieee80211_vif *vif,
 810                                     u32 action, bool force_assoc_off,
 811                                     const u8 *bssid_override)
 812 {
 813         struct iwl_mac_ctx_cmd cmd = {};
 814         struct iwl_mac_data_sta *ctxt_sta;
 815
 816         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 817
 818         /* Fill the common data for all mac context types */
 819         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 820
 821         if (vif->p2p) {
 822                 struct ieee80211_p2p_noa_attr *noa =
 823                         &vif->bss_conf.p2p_noa_attr;
 824
 825                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 826                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 827                 ctxt_sta = &cmd.p2p_sta.sta;
 828         } else {
 829                 ctxt_sta = &cmd.sta;
 830         }
 831
 832         /* We need the dtim_period to set the MAC as associated */
 833         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 834             !force_assoc_off) {
 835                 u32 dtim_offs;
 836
 837                 /*
 838                  * The DTIM count counts down, so when it is N that means N
 839                  * more beacon intervals happen until the DTIM TBTT. Therefore
 840                  * add this to the current time. If that ends up being in the
 841                  * future, the firmware will handle it.
 842                  *
 843                  * Also note that the system_timestamp (which we get here as
 844                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 845                  * same offset in the frame -- the TSF is at the first symbol
 846                  * of the TSF, the system timestamp is at signal acquisition
 847                  * time. This means there's an offset between them of at most
 848                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 849                  * 384us in the longest case), this is currently not relevant
 850                  * as the firmware wakes up around 2ms before the TBTT.
 851                  */
 852                 dtim_offs = vif->bss_conf.sync_dtim_count *
 853                                 vif->bss_conf.beacon_int;
 854                 /* convert TU to usecs */
 855                 dtim_offs *= 1024;
 856
 857                 ctxt_sta->dtim_tsf =
 858                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 859                 ctxt_sta->dtim_time =
 860                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 861
 862                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 863                                le64_to_cpu(ctxt_sta->dtim_tsf),
 864                                le32_to_cpu(ctxt_sta->dtim_time),
 865                                dtim_offs);
 866
 867                 ctxt_sta->is_assoc = cpu_to_le32(1);
 868         } else {
 869                 ctxt_sta->is_assoc = cpu_to_le32(0);
 870
 871                 /* Allow beacons to pass through as long as we are not
 872                  * associated, or we do not have dtim period information.
 873                  */
 874                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 875         }
 876
 877         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 878         ctxt_sta->bi_reciprocal =
 879                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 880         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 881                                               vif->bss_conf.dtim_period);
 882         ctxt_sta->dtim_reciprocal =
 883                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 884                                                vif->bss_conf.dtim_period));
 885
 886         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 887         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 888
 889         if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 890                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 891
 892         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 893 }
 894
 895 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 896                                          struct ieee80211_vif *vif,
 897                                          u32 action)
 898 {
 899         struct iwl_mac_ctx_cmd cmd = {};
 900         u32 tfd_queue_msk = 0;
 901         int ret, i;
 902
 903         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 904
 905         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 906
 907         for (i = 0; i < IEEE80211_NUM_ACS; i++)
 908                 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
 909                         tfd_queue_msk |= BIT(vif->hw_queue[i]);
 910
 911         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 912                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 913                                        MAC_FILTER_IN_BEACON |
 914                                        MAC_FILTER_IN_PROBE_REQUEST |
 915                                        MAC_FILTER_IN_CRC32);
 916         ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 917
 918         /* Allocate sniffer station */
 919         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
 920                                        vif->type);
 921         if (ret)
 922                 return ret;
 923
 924         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 925 }
 926
 927 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 928                                      struct ieee80211_vif *vif,
 929                                      u32 action)
 930 {
 931         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 932         struct iwl_mac_ctx_cmd cmd = {};
 933
 934         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 935
 936         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 937
 938         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 939                                        MAC_FILTER_IN_PROBE_REQUEST);
 940
 941         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 942         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 943         cmd.ibss.bi_reciprocal =
 944                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 945
 946         /* TODO: Assumes that the beacon id == mac context id */
 947         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 948
 949         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 950 }
 951
 952 struct iwl_mvm_go_iterator_data {
 953         bool go_active;
 954 };
 955
 956 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 957 {
 958         struct iwl_mvm_go_iterator_data *data = _data;
 959         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 960
 961         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 962             mvmvif->ap_ibss_active)
 963                 data->go_active = true;
 964 }
 965
 966 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 967                                            struct ieee80211_vif *vif,
 968                                            u32 action)
 969 {
 970         struct iwl_mac_ctx_cmd cmd = {};
 971         struct iwl_mvm_go_iterator_data data = {};
 972
 973         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 974
 975         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 976
 977         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 978
 979         /* Override the filter flags to accept only probe requests */
 980         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 981
 982         /*
 983          * This flag should be set to true when the P2P Device is
 984          * discoverable and there is at least another active P2P GO. Settings
 985          * this flag will allow the P2P Device to be discoverable on other
 986          * channels in addition to its listen channel.
 987          * Note that this flag should not be set in other cases as it opens the
 988          * Rx filters on all MAC and increases the number of interrupts.
 989          */
 990         ieee80211_iterate_active_interfaces_atomic(
 991                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 992                 iwl_mvm_go_iterator, &data);
 993
 994         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 995         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 996 }
 997
 998 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 999                                      struct iwl_mac_beacon_cmd *beacon_cmd,
1000                                      u8 *beacon, u32 frame_size)
1001 {
1002         u32 tim_idx;
1003         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
1004
1005         /* The index is relative to frame start but we start looking at the
1006          * variable-length part of the beacon. */
1007         tim_idx = mgmt->u.beacon.variable - beacon;
1008
1009         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
1010         while ((tim_idx < (frame_size - 2)) &&
1011                         (beacon[tim_idx] != WLAN_EID_TIM))
1012                 tim_idx += beacon[tim_idx+1] + 2;
1013
1014         /* If TIM field was found, set variables */
1015         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
1016                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
1017                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
1018         } else {
1019                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
1020         }
1021 }
1022
1023 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
1024                                         struct ieee80211_vif *vif,
1025                                         struct sk_buff *beacon)
1026 {
1027         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1028         struct iwl_host_cmd cmd = {
1029                 .id = BEACON_TEMPLATE_CMD,
1030                 .flags = CMD_ASYNC,
1031         };
1032         struct iwl_mac_beacon_cmd beacon_cmd = {};
1033         struct ieee80211_tx_info *info;
1034         u32 beacon_skb_len;
1035         u32 rate, tx_flags;
1036
1037         if (WARN_ON(!beacon))
1038                 return -EINVAL;
1039
1040         beacon_skb_len = beacon->len;
1041
1042         /* TODO: for now the beacon template id is set to be the mac context id.
1043          * Might be better to handle it as another resource ... */
1044         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1045         info = IEEE80211_SKB_CB(beacon);
1046
1047         /* Set up TX command fields */
1048         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
1049         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
1050         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
1051         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
1052         tx_flags |=
1053                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
1054                                                 TX_CMD_FLG_BT_PRIO_POS;
1055         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
1056
1057         if (!fw_has_capa(&mvm->fw->ucode_capa,
1058                          IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) {
1059                 mvm->mgmt_last_antenna_idx =
1060                         iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
1061                                              mvm->mgmt_last_antenna_idx);
1062         }
1063
1064         beacon_cmd.tx.rate_n_flags =
1065                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
1066                             RATE_MCS_ANT_POS);
1067
1068         if (info->band == NL80211_BAND_5GHZ || vif->p2p) {
1069                 rate = IWL_FIRST_OFDM_RATE;
1070         } else {
1071                 rate = IWL_FIRST_CCK_RATE;
1072                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
1073         }
1074         beacon_cmd.tx.rate_n_flags |=
1075                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
1076
1077         /* Set up TX beacon command fields */
1078         if (vif->type == NL80211_IFTYPE_AP)
1079                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
1080                                          beacon->data,
1081                                          beacon_skb_len);
1082
1083         /* Submit command */
1084         cmd.len[0] = sizeof(beacon_cmd);
1085         cmd.data[0] = &beacon_cmd;
1086         cmd.dataflags[0] = 0;
1087         cmd.len[1] = beacon_skb_len;
1088         cmd.data[1] = beacon->data;
1089         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
1090
1091         return iwl_mvm_send_cmd(mvm, &cmd);
1092 }
1093
1094 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1095 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1096                                     struct ieee80211_vif *vif)
1097 {
1098         struct sk_buff *beacon;
1099         int ret;
1100
1101         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1102                 vif->type != NL80211_IFTYPE_ADHOC);
1103
1104         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1105         if (!beacon)
1106                 return -ENOMEM;
1107
1108         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1109         dev_kfree_skb(beacon);
1110         return ret;
1111 }
1112
1113 struct iwl_mvm_mac_ap_iterator_data {
1114         struct iwl_mvm *mvm;
1115         struct ieee80211_vif *vif;
1116         u32 beacon_device_ts;
1117         u16 beacon_int;
1118 };
1119
1120 /* Find the beacon_device_ts and beacon_int for a managed interface */
1121 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1122                                     struct ieee80211_vif *vif)
1123 {
1124         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1125
1126         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1127                 return;
1128
1129         /* Station client has higher priority over P2P client*/
1130         if (vif->p2p && data->beacon_device_ts)
1131                 return;
1132
1133         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1134         data->beacon_int = vif->bss_conf.beacon_int;
1135 }
1136
1137 /*
1138  * Fill the specific data for mac context of type AP of P2P GO
1139  */
1140 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1141                                          struct ieee80211_vif *vif,
1142                                          struct iwl_mac_data_ap *ctxt_ap,
1143                                          bool add)
1144 {
1145         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1146         struct iwl_mvm_mac_ap_iterator_data data = {
1147                 .mvm = mvm,
1148                 .vif = vif,
1149                 .beacon_device_ts = 0
1150         };
1151
1152         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1153         ctxt_ap->bi_reciprocal =
1154                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1155         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1156                                              vif->bss_conf.dtim_period);
1157         ctxt_ap->dtim_reciprocal =
1158                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1159                                                vif->bss_conf.dtim_period));
1160
1161         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1162
1163         /*
1164          * Only set the beacon time when the MAC is being added, when we
1165          * just modify the MAC then we should keep the time -- the firmware
1166          * can otherwise have a "jumping" TBTT.
1167          */
1168         if (add) {
1169                 /*
1170                  * If there is a station/P2P client interface which is
1171                  * associated, set the AP's TBTT far enough from the station's
1172                  * TBTT. Otherwise, set it to the current system time
1173                  */
1174                 ieee80211_iterate_active_interfaces_atomic(
1175                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1176                         iwl_mvm_mac_ap_iterator, &data);
1177
1178                 if (data.beacon_device_ts) {
1179                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1180                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1181                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1182                                                      100);
1183                 } else {
1184                         mvmvif->ap_beacon_time =
1185                                 iwl_read_prph(mvm->trans,
1186                                               DEVICE_SYSTEM_TIME_REG);
1187                 }
1188         }
1189
1190         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1191         ctxt_ap->beacon_tsf = 0; /* unused */
1192
1193         /* TODO: Assume that the beacon id == mac context id */
1194         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1195 }
1196
1197 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1198                                    struct ieee80211_vif *vif,
1199                                    u32 action)
1200 {
1201         struct iwl_mac_ctx_cmd cmd = {};
1202
1203         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1204
1205         /* Fill the common data for all mac context types */
1206         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1207
1208         /* Fill the data specific for ap mode */
1209         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1210                                      action == FW_CTXT_ACTION_ADD);
1211
1212         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1213 }
1214
1215 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1216                                    struct ieee80211_vif *vif,
1217                                    u32 action)
1218 {
1219         struct iwl_mac_ctx_cmd cmd = {};
1220         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1221
1222         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1223
1224         /* Fill the common data for all mac context types */
1225         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1226
1227         /* Fill the data specific for GO mode */
1228         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1229                                      action == FW_CTXT_ACTION_ADD);
1230
1231         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1232                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1233         cmd.go.opp_ps_enabled =
1234                         cpu_to_le32(!!(noa->oppps_ctwindow &
1235                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1236
1237         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1238 }
1239
1240 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1241                                 u32 action, bool force_assoc_off,
1242                                 const u8 *bssid_override)
1243 {
1244         switch (vif->type) {
1245         case NL80211_IFTYPE_STATION:
1246                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1247                                                 force_assoc_off,
1248                                                 bssid_override);
1249                 break;
1250         case NL80211_IFTYPE_AP:
1251                 if (!vif->p2p)
1252                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1253                 else
1254                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1255                 break;
1256         case NL80211_IFTYPE_MONITOR:
1257                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1258         case NL80211_IFTYPE_P2P_DEVICE:
1259                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1260         case NL80211_IFTYPE_ADHOC:
1261                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1262         default:
1263                 break;
1264         }
1265
1266         return -EOPNOTSUPP;
1267 }
1268
1269 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1270 {
1271         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1272         int ret;
1273
1274         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1275                       vif->addr, ieee80211_vif_type_p2p(vif)))
1276                 return -EIO;
1277
1278         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1279                                    true, NULL);
1280         if (ret)
1281                 return ret;
1282
1283         /* will only do anything at resume from D3 time */
1284         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1285
1286         mvmvif->uploaded = true;
1287         return 0;
1288 }
1289
1290 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1291                              bool force_assoc_off, const u8 *bssid_override)
1292 {
1293         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1294
1295         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1296                       vif->addr, ieee80211_vif_type_p2p(vif)))
1297                 return -EIO;
1298
1299         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1300                                     force_assoc_off, bssid_override);
1301 }
1302
1303 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1304 {
1305         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1306         struct iwl_mac_ctx_cmd cmd;
1307         int ret;
1308
1309         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1310                       vif->addr, ieee80211_vif_type_p2p(vif)))
1311                 return -EIO;
1312
1313         memset(&cmd, 0, sizeof(cmd));
1314
1315         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1316                                                            mvmvif->color));
1317         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1318
1319         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1320                                    sizeof(cmd), &cmd);
1321         if (ret) {
1322                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1323                 return ret;
1324         }
1325
1326         mvmvif->uploaded = false;
1327
1328         if (vif->type == NL80211_IFTYPE_MONITOR) {
1329                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1330                 iwl_mvm_dealloc_snif_sta(mvm);
1331         }
1332
1333         return 0;
1334 }
1335
1336 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1337                                    struct ieee80211_vif *csa_vif, u32 gp2,
1338                                    bool tx_success)
1339 {
1340         struct iwl_mvm_vif *mvmvif =
1341                         iwl_mvm_vif_from_mac80211(csa_vif);
1342
1343         /* Don't start to countdown from a failed beacon */
1344         if (!tx_success && !mvmvif->csa_countdown)
1345                 return;
1346
1347         mvmvif->csa_countdown = true;
1348
1349         if (!ieee80211_csa_is_complete(csa_vif)) {
1350                 int c = ieee80211_csa_update_counter(csa_vif);
1351
1352                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1353                 if (csa_vif->p2p &&
1354                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1355                     tx_success) {
1356                         u32 rel_time = (c + 1) *
1357                                        csa_vif->bss_conf.beacon_int -
1358                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1359                         u32 apply_time = gp2 + rel_time * 1024;
1360
1361                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1362                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1363                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1364                                          apply_time);
1365                 }
1366         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1367                 /* we don't have CSA NoA scheduled yet, switch now */
1368                 ieee80211_csa_finish(csa_vif);
1369                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1370         }
1371 }
1372
1373 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1374                              struct iwl_rx_cmd_buffer *rxb)
1375 {
1376         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1377         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1378         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1379         struct ieee80211_vif *csa_vif;
1380         struct ieee80211_vif *tx_blocked_vif;
1381         u16 status;
1382
1383         lockdep_assert_held(&mvm->mutex);
1384
1385         beacon_notify_hdr = &beacon->beacon_notify_hdr;
1386         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1387
1388         status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK;
1389         IWL_DEBUG_RX(mvm,
1390                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1391                      status, beacon_notify_hdr->failure_frame,
1392                      le64_to_cpu(beacon->tsf),
1393                      mvm->ap_last_beacon_gp2,
1394                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1395
1396         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1397                                             lockdep_is_held(&mvm->mutex));
1398         if (unlikely(csa_vif && csa_vif->csa_active))
1399                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1400                                        (status == TX_STATUS_SUCCESS));
1401
1402         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1403                                                 lockdep_is_held(&mvm->mutex));
1404         if (unlikely(tx_blocked_vif)) {
1405                 struct iwl_mvm_vif *mvmvif =
1406                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1407
1408                 /*
1409                  * The channel switch is started and we have blocked the
1410                  * stations. If this is the first beacon (the timeout wasn't
1411                  * set), set the unblock timeout, otherwise countdown
1412                  */
1413                 if (!mvm->csa_tx_block_bcn_timeout)
1414                         mvm->csa_tx_block_bcn_timeout =
1415                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1416                 else
1417                         mvm->csa_tx_block_bcn_timeout--;
1418
1419                 /* Check if the timeout is expired, and unblock tx */
1420                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1421                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1422                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1423                 }
1424         }
1425 }
1426
1427 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1428                                          struct ieee80211_vif *vif)
1429 {
1430         struct iwl_missed_beacons_notif *missed_beacons = _data;
1431         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1432         struct iwl_mvm *mvm = mvmvif->mvm;
1433         struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1434         struct iwl_fw_dbg_trigger_tlv *trigger;
1435         u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1436         u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1437
1438         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1439                 return;
1440
1441         rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1442         rx_missed_bcon_since_rx =
1443                 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1444         /*
1445          * TODO: the threshold should be adjusted based on latency conditions,
1446          * and/or in case of a CS flow on one of the other AP vifs.
1447          */
1448         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1449              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1450                 ieee80211_beacon_loss(vif);
1451
1452         if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1453                                         FW_DBG_TRIGGER_MISSED_BEACONS))
1454                 return;
1455
1456         trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1457                                          FW_DBG_TRIGGER_MISSED_BEACONS);
1458         bcon_trig = (void *)trigger->data;
1459         stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1460         stop_trig_missed_bcon_since_rx =
1461                 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1462
1463         /* TODO: implement start trigger */
1464
1465         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger))
1466                 return;
1467
1468         if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1469             rx_missed_bcon >= stop_trig_missed_bcon)
1470                 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL);
1471 }
1472
1473 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1474                                      struct iwl_rx_cmd_buffer *rxb)
1475 {
1476         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1477         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1478
1479         IWL_DEBUG_INFO(mvm,
1480                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1481                        le32_to_cpu(mb->mac_id),
1482                        le32_to_cpu(mb->consec_missed_beacons),
1483                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1484                        le32_to_cpu(mb->num_recvd_beacons),
1485                        le32_to_cpu(mb->num_expected_beacons));
1486
1487         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1488                                                    IEEE80211_IFACE_ITER_NORMAL,
1489                                                    iwl_mvm_beacon_loss_iterator,
1490                                                    mb);
1491 }
1492
1493 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1494                                     struct iwl_rx_cmd_buffer *rxb)
1495 {
1496         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1497         struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1498         struct ieee80211_rx_status rx_status;
1499         struct sk_buff *skb;
1500         u32 size = le32_to_cpu(sb->byte_count);
1501
1502         if (size == 0)
1503                 return;
1504
1505         skb = alloc_skb(size, GFP_ATOMIC);
1506         if (!skb) {
1507                 IWL_ERR(mvm, "alloc_skb failed\n");
1508                 return;
1509         }
1510
1511         /* update rx_status according to the notification's metadata */
1512         memset(&rx_status, 0, sizeof(rx_status));
1513         rx_status.mactime = le64_to_cpu(sb->tsf);
1514         /* TSF as indicated by the firmware  is at INA time */
1515         rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1516         rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1517         rx_status.band =
1518                 (sb->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1519                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1520         rx_status.freq =
1521                 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1522                                                rx_status.band);
1523
1524         /* copy the data */
1525         memcpy(skb_put(skb, size), sb->data, size);
1526         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1527
1528         /* pass it as regular rx to mac80211 */
1529         ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1530 }