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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  26  * in the file called COPYING.
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  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65
  66 #include <linux/etherdevice.h>
  67 #include <net/mac80211.h>
  68 #include "iwl-io.h"
  69 #include "iwl-prph.h"
  70 #include "fw-api.h"
  71 #include "mvm.h"
  72 #include "time-event.h"
  73
  74 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  75         IWL_MVM_TX_FIFO_VO,
  76         IWL_MVM_TX_FIFO_VI,
  77         IWL_MVM_TX_FIFO_BE,
  78         IWL_MVM_TX_FIFO_BK,
  79 };
  80
  81 struct iwl_mvm_mac_iface_iterator_data {
  82         struct iwl_mvm *mvm;
  83         struct ieee80211_vif *vif;
  84         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  85         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  86         u32 used_hw_queues;
  87         enum iwl_tsf_id preferred_tsf;
  88         bool found_vif;
  89 };
  90
  91 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  92                                     struct ieee80211_vif *vif)
  93 {
  94         struct iwl_mvm_mac_iface_iterator_data *data = _data;
  95         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  96         u16 min_bi;
  97
  98         /* Skip the interface for which we are trying to assign a tsf_id  */
  99         if (vif == data->vif)
 100                 return;
 101
 102         /*
 103          * The TSF is a hardware/firmware resource, there are 4 and
 104          * the driver should assign and free them as needed. However,
 105          * there are cases where 2 MACs should share the same TSF ID
 106          * for the purpose of clock sync, an optimization to avoid
 107          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 108          * client in the system.
 109          *
 110          * The firmware will decide according to the MAC type which
 111          * will be the master and slave. Clients that need to sync
 112          * with a remote station will be the master, and an AP or GO
 113          * will be the slave.
 114          *
 115          * Depending on the new interface type it can be slaved to
 116          * or become the master of an existing interface.
 117          */
 118         switch (data->vif->type) {
 119         case NL80211_IFTYPE_STATION:
 120                 /*
 121                  * The new interface is a client, so if the one we're iterating
 122                  * is an AP, and the beacon interval of the AP is a multiple or
 123                  * divisor of the beacon interval of the client, the same TSF
 124                  * should be used to avoid drift between the new client and
 125                  * existing AP. The existing AP will get drift updates from the
 126                  * new client context in this case.
 127                  */
 128                 if (vif->type != NL80211_IFTYPE_AP ||
 129                     data->preferred_tsf != NUM_TSF_IDS ||
 130                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 131                         break;
 132
 133                 min_bi = min(data->vif->bss_conf.beacon_int,
 134                              vif->bss_conf.beacon_int);
 135
 136                 if (!min_bi)
 137                         break;
 138
 139                 if ((data->vif->bss_conf.beacon_int -
 140                      vif->bss_conf.beacon_int) % min_bi == 0) {
 141                         data->preferred_tsf = mvmvif->tsf_id;
 142                         return;
 143                 }
 144                 break;
 145
 146         case NL80211_IFTYPE_AP:
 147                 /*
 148                  * The new interface is AP/GO, so if its beacon interval is a
 149                  * multiple or a divisor of the beacon interval of an existing
 150                  * interface, it should get drift updates from an existing
 151                  * client or use the same TSF as an existing GO. There's no
 152                  * drift between TSFs internally but if they used different
 153                  * TSFs then a new client MAC could update one of them and
 154                  * cause drift that way.
 155                  */
 156                 if ((vif->type != NL80211_IFTYPE_AP &&
 157                      vif->type != NL80211_IFTYPE_STATION) ||
 158                     data->preferred_tsf != NUM_TSF_IDS ||
 159                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 160                         break;
 161
 162                 min_bi = min(data->vif->bss_conf.beacon_int,
 163                              vif->bss_conf.beacon_int);
 164
 165                 if (!min_bi)
 166                         break;
 167
 168                 if ((data->vif->bss_conf.beacon_int -
 169                      vif->bss_conf.beacon_int) % min_bi == 0) {
 170                         data->preferred_tsf = mvmvif->tsf_id;
 171                         return;
 172                 }
 173                 break;
 174         default:
 175                 /*
 176                  * For all other interface types there's no need to
 177                  * take drift into account. Either they're exclusive
 178                  * like IBSS and monitor, or we don't care much about
 179                  * their TSF (like P2P Device), but we won't be able
 180                  * to share the TSF resource.
 181                  */
 182                 break;
 183         }
 184
 185         /*
 186          * Unless we exited above, we can't share the TSF resource
 187          * that the virtual interface we're iterating over is using
 188          * with the new one, so clear the available bit and if this
 189          * was the preferred one, reset that as well.
 190          */
 191         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 192
 193         if (data->preferred_tsf == mvmvif->tsf_id)
 194                 data->preferred_tsf = NUM_TSF_IDS;
 195 }
 196
 197 /*
 198  * Get the mask of the queues used by the vif
 199  */
 200 u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
 201                                 struct ieee80211_vif *vif)
 202 {
 203         u32 qmask = 0, ac;
 204
 205         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 206                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 207
 208         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 209                 qmask |= BIT(vif->hw_queue[ac]);
 210
 211         if (vif->type == NL80211_IFTYPE_AP)
 212                 qmask |= BIT(vif->cab_queue);
 213
 214         return qmask;
 215 }
 216
 217 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 218                                        struct ieee80211_vif *vif)
 219 {
 220         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 221         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 222
 223         /* Iterator may already find the interface being added -- skip it */
 224         if (vif == data->vif) {
 225                 data->found_vif = true;
 226                 return;
 227         }
 228
 229         /* Mark the queues used by the vif */
 230         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(data->mvm, vif);
 231
 232         /* Mark MAC IDs as used by clearing the available bit, and
 233          * (below) mark TSFs as used if their existing use is not
 234          * compatible with the new interface type.
 235          * No locking or atomic bit operations are needed since the
 236          * data is on the stack of the caller function.
 237          */
 238         __clear_bit(mvmvif->id, data->available_mac_ids);
 239
 240         /* find a suitable tsf_id */
 241         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 242 }
 243
 244 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 245                                     struct ieee80211_vif *vif)
 246 {
 247         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 248         struct iwl_mvm_mac_iface_iterator_data data = {
 249                 .mvm = mvm,
 250                 .vif = vif,
 251                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 252                 /* no preference yet */
 253                 .preferred_tsf = NUM_TSF_IDS,
 254         };
 255
 256         ieee80211_iterate_active_interfaces_atomic(
 257                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 258                 iwl_mvm_mac_tsf_id_iter, &data);
 259
 260         if (data.preferred_tsf != NUM_TSF_IDS)
 261                 mvmvif->tsf_id = data.preferred_tsf;
 262         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 263                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 264                                                 NUM_TSF_IDS);
 265 }
 266
 267 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 268                                                struct ieee80211_vif *vif)
 269 {
 270         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 271         struct iwl_mvm_mac_iface_iterator_data data = {
 272                 .mvm = mvm,
 273                 .vif = vif,
 274                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 275                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 276                 /* no preference yet */
 277                 .preferred_tsf = NUM_TSF_IDS,
 278                 .used_hw_queues =
 279                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 280                         BIT(mvm->aux_queue) |
 281                         BIT(IWL_MVM_CMD_QUEUE),
 282                 .found_vif = false,
 283         };
 284         u32 ac;
 285         int ret, i;
 286         unsigned long used_hw_queues;
 287
 288         /*
 289          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 290          * and other resources.
 291          */
 292
 293         /*
 294          * Before the iterator, we start with all MAC IDs and TSFs available.
 295          *
 296          * During iteration, all MAC IDs are cleared that are in use by other
 297          * virtual interfaces, and all TSF IDs are cleared that can't be used
 298          * by this new virtual interface because they're used by an interface
 299          * that can't share it with the new one.
 300          * At the same time, we check if there's a preferred TSF in the case
 301          * that we should share it with another interface.
 302          */
 303
 304         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 305         switch (vif->type) {
 306         case NL80211_IFTYPE_ADHOC:
 307                 break;
 308         case NL80211_IFTYPE_STATION:
 309                 if (!vif->p2p)
 310                         break;
 311                 /* fall through */
 312         default:
 313                 __clear_bit(0, data.available_mac_ids);
 314         }
 315
 316         ieee80211_iterate_active_interfaces_atomic(
 317                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 318                 iwl_mvm_mac_iface_iterator, &data);
 319
 320         /*
 321          * In the case we're getting here during resume, it's similar to
 322          * firmware restart, and with RESUME_ALL the iterator will find
 323          * the vif being added already.
 324          * We don't want to reassign any IDs in either case since doing
 325          * so would probably assign different IDs (as interfaces aren't
 326          * necessarily added in the same order), but the old IDs were
 327          * preserved anyway, so skip ID assignment for both resume and
 328          * recovery.
 329          */
 330         if (data.found_vif)
 331                 return 0;
 332
 333         /* Therefore, in recovery, we can't get here */
 334         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 335                 return -EBUSY;
 336
 337         mvmvif->id = find_first_bit(data.available_mac_ids,
 338                                     NUM_MAC_INDEX_DRIVER);
 339         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 340                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 341                 ret = -EIO;
 342                 goto exit_fail;
 343         }
 344
 345         if (data.preferred_tsf != NUM_TSF_IDS)
 346                 mvmvif->tsf_id = data.preferred_tsf;
 347         else
 348                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 349                                                 NUM_TSF_IDS);
 350         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 351                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 352                 ret = -EIO;
 353                 goto exit_fail;
 354         }
 355
 356         mvmvif->color = 0;
 357
 358         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 359         mvmvif->time_event_data.id = TE_MAX;
 360
 361         /* No need to allocate data queues to P2P Device MAC.*/
 362         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 363                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 364                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 365
 366                 return 0;
 367         }
 368
 369         used_hw_queues = data.used_hw_queues;
 370
 371         /* Find available queues, and allocate them to the ACs */
 372         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 373                 u8 queue = find_first_zero_bit(&used_hw_queues,
 374                                                mvm->first_agg_queue);
 375
 376                 if (queue >= mvm->first_agg_queue) {
 377                         IWL_ERR(mvm, "Failed to allocate queue\n");
 378                         ret = -EIO;
 379                         goto exit_fail;
 380                 }
 381
 382                 __set_bit(queue, &used_hw_queues);
 383                 vif->hw_queue[ac] = queue;
 384         }
 385
 386         /* Allocate the CAB queue for softAP and GO interfaces */
 387         if (vif->type == NL80211_IFTYPE_AP) {
 388                 u8 queue = find_first_zero_bit(&used_hw_queues,
 389                                                mvm->first_agg_queue);
 390
 391                 if (queue >= mvm->first_agg_queue) {
 392                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 393                         ret = -EIO;
 394                         goto exit_fail;
 395                 }
 396
 397                 vif->cab_queue = queue;
 398         } else {
 399                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 400         }
 401
 402         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 403         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 404
 405         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 406                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 407
 408         return 0;
 409
 410 exit_fail:
 411         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 412         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 413         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 414         return ret;
 415 }
 416
 417 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 418 {
 419         u32 ac;
 420         int ret;
 421
 422         lockdep_assert_held(&mvm->mutex);
 423
 424         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 425         if (ret)
 426                 return ret;
 427
 428         switch (vif->type) {
 429         case NL80211_IFTYPE_P2P_DEVICE:
 430                 iwl_trans_ac_txq_enable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
 431                                         IWL_MVM_TX_FIFO_VO);
 432                 break;
 433         case NL80211_IFTYPE_AP:
 434                 iwl_trans_ac_txq_enable(mvm->trans, vif->cab_queue,
 435                                         IWL_MVM_TX_FIFO_MCAST);
 436                 /* fall through */
 437         default:
 438                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 439                         iwl_trans_ac_txq_enable(mvm->trans, vif->hw_queue[ac],
 440                                                 iwl_mvm_ac_to_tx_fifo[ac]);
 441                 break;
 442         }
 443
 444         return 0;
 445 }
 446
 447 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 448 {
 449         int ac;
 450
 451         lockdep_assert_held(&mvm->mutex);
 452
 453         switch (vif->type) {
 454         case NL80211_IFTYPE_P2P_DEVICE:
 455                 iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
 456                                       true);
 457                 break;
 458         case NL80211_IFTYPE_AP:
 459                 iwl_trans_txq_disable(mvm->trans, vif->cab_queue, true);
 460                 /* fall through */
 461         default:
 462                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 463                         iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac],
 464                                               true);
 465         }
 466 }
 467
 468 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 469                               struct ieee80211_vif *vif,
 470                               enum ieee80211_band band,
 471                               u8 *cck_rates, u8 *ofdm_rates)
 472 {
 473         struct ieee80211_supported_band *sband;
 474         unsigned long basic = vif->bss_conf.basic_rates;
 475         int lowest_present_ofdm = 100;
 476         int lowest_present_cck = 100;
 477         u8 cck = 0;
 478         u8 ofdm = 0;
 479         int i;
 480
 481         sband = mvm->hw->wiphy->bands[band];
 482
 483         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 484                 int hw = sband->bitrates[i].hw_value;
 485                 if (hw >= IWL_FIRST_OFDM_RATE) {
 486                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 487                         if (lowest_present_ofdm > hw)
 488                                 lowest_present_ofdm = hw;
 489                 } else {
 490                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 491
 492                         cck |= BIT(hw);
 493                         if (lowest_present_cck > hw)
 494                                 lowest_present_cck = hw;
 495                 }
 496         }
 497
 498         /*
 499          * Now we've got the basic rates as bitmaps in the ofdm and cck
 500          * variables. This isn't sufficient though, as there might not
 501          * be all the right rates in the bitmap. E.g. if the only basic
 502          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 503          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 504          *
 505          *    [...] a STA responding to a received frame shall transmit
 506          *    its Control Response frame [...] at the highest rate in the
 507          *    BSSBasicRateSet parameter that is less than or equal to the
 508          *    rate of the immediately previous frame in the frame exchange
 509          *    sequence ([...]) and that is of the same modulation class
 510          *    ([...]) as the received frame. If no rate contained in the
 511          *    BSSBasicRateSet parameter meets these conditions, then the
 512          *    control frame sent in response to a received frame shall be
 513          *    transmitted at the highest mandatory rate of the PHY that is
 514          *    less than or equal to the rate of the received frame, and
 515          *    that is of the same modulation class as the received frame.
 516          *
 517          * As a consequence, we need to add all mandatory rates that are
 518          * lower than all of the basic rates to these bitmaps.
 519          */
 520
 521         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 522                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 523         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 524                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 525         /* 6M already there or needed so always add */
 526         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 527
 528         /*
 529          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 530          * Note, however:
 531          *  - if no CCK rates are basic, it must be ERP since there must
 532          *    be some basic rates at all, so they're OFDM => ERP PHY
 533          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 534          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 535          *  - if 5.5M is basic, 1M and 2M are mandatory
 536          *  - if 2M is basic, 1M is mandatory
 537          *  - if 1M is basic, that's the only valid ACK rate.
 538          * As a consequence, it's not as complicated as it sounds, just add
 539          * any lower rates to the ACK rate bitmap.
 540          */
 541         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 542                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 543         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 544                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 545         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 546                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 547         /* 1M already there or needed so always add */
 548         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 549
 550         *cck_rates = cck;
 551         *ofdm_rates = ofdm;
 552 }
 553
 554 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 555                                          struct ieee80211_vif *vif,
 556                                          struct iwl_mac_ctx_cmd *cmd)
 557 {
 558         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 559         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 560                                  IEEE80211_HT_OP_MODE_PROTECTION;
 561         /* The fw does not distinguish between ht and fat */
 562         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 563
 564         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 565         /*
 566          * See section 9.23.3.1 of IEEE 80211-2012.
 567          * Nongreenfield HT STAs Present is not supported.
 568          */
 569         switch (protection_mode) {
 570         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 571                 break;
 572         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 573         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 574                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 575                 break;
 576         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 577                 /* Protect when channel wider than 20MHz */
 578                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 579                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 580                 break;
 581         default:
 582                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 583                         protection_mode);
 584                 break;
 585         }
 586 }
 587
 588 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 589                                         struct ieee80211_vif *vif,
 590                                         struct iwl_mac_ctx_cmd *cmd,
 591                                         const u8 *bssid_override,
 592                                         u32 action)
 593 {
 594         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 595         struct ieee80211_chanctx_conf *chanctx;
 596         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 597                              IEEE80211_HT_OP_MODE_PROTECTION);
 598         u8 cck_ack_rates, ofdm_ack_rates;
 599         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 600         int i;
 601
 602         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 603                                                             mvmvif->color));
 604         cmd->action = cpu_to_le32(action);
 605
 606         switch (vif->type) {
 607         case NL80211_IFTYPE_STATION:
 608                 if (vif->p2p)
 609                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 610                 else
 611                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 612                 break;
 613         case NL80211_IFTYPE_AP:
 614                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 615                 break;
 616         case NL80211_IFTYPE_MONITOR:
 617                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 618                 break;
 619         case NL80211_IFTYPE_P2P_DEVICE:
 620                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 621                 break;
 622         case NL80211_IFTYPE_ADHOC:
 623                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 624                 break;
 625         default:
 626                 WARN_ON_ONCE(1);
 627         }
 628
 629         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 630
 631         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 632
 633         if (bssid)
 634                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 635         else
 636                 eth_broadcast_addr(cmd->bssid_addr);
 637
 638         rcu_read_lock();
 639         chanctx = rcu_dereference(vif->chanctx_conf);
 640         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 641                                             : IEEE80211_BAND_2GHZ,
 642                           &cck_ack_rates, &ofdm_ack_rates);
 643         rcu_read_unlock();
 644
 645         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 646         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 647
 648         cmd->cck_short_preamble =
 649                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 650                             MAC_FLG_SHORT_PREAMBLE : 0);
 651         cmd->short_slot =
 652                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 653                             MAC_FLG_SHORT_SLOT : 0);
 654
 655         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 656                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 657
 658                 cmd->ac[txf].cw_min =
 659                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 660                 cmd->ac[txf].cw_max =
 661                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 662                 cmd->ac[txf].edca_txop =
 663                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 664                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 665                 cmd->ac[txf].fifos_mask = BIT(txf);
 666         }
 667
 668         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 669         if (vif->type == NL80211_IFTYPE_AP)
 670                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 671                         BIT(IWL_MVM_TX_FIFO_MCAST);
 672
 673         if (vif->bss_conf.qos)
 674                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 675
 676         if (vif->bss_conf.use_cts_prot)
 677                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 678
 679         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 680                        vif->bss_conf.use_cts_prot,
 681                        vif->bss_conf.ht_operation_mode);
 682         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 683                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 684         if (ht_enabled)
 685                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 686
 687         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 688 }
 689
 690 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 691                                      struct iwl_mac_ctx_cmd *cmd)
 692 {
 693         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 694                                        sizeof(*cmd), cmd);
 695         if (ret)
 696                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 697                         le32_to_cpu(cmd->action), ret);
 698         return ret;
 699 }
 700
 701 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 702                                     struct ieee80211_vif *vif,
 703                                     u32 action, bool force_assoc_off,
 704                                     const u8 *bssid_override)
 705 {
 706         struct iwl_mac_ctx_cmd cmd = {};
 707         struct iwl_mac_data_sta *ctxt_sta;
 708
 709         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 710
 711         /* Fill the common data for all mac context types */
 712         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 713
 714         if (vif->p2p) {
 715                 struct ieee80211_p2p_noa_attr *noa =
 716                         &vif->bss_conf.p2p_noa_attr;
 717
 718                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 719                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 720                 ctxt_sta = &cmd.p2p_sta.sta;
 721         } else {
 722                 ctxt_sta = &cmd.sta;
 723         }
 724
 725         /* We need the dtim_period to set the MAC as associated */
 726         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 727             !force_assoc_off) {
 728                 u32 dtim_offs;
 729
 730                 /*
 731                  * The DTIM count counts down, so when it is N that means N
 732                  * more beacon intervals happen until the DTIM TBTT. Therefore
 733                  * add this to the current time. If that ends up being in the
 734                  * future, the firmware will handle it.
 735                  *
 736                  * Also note that the system_timestamp (which we get here as
 737                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 738                  * same offset in the frame -- the TSF is at the first symbol
 739                  * of the TSF, the system timestamp is at signal acquisition
 740                  * time. This means there's an offset between them of at most
 741                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 742                  * 384us in the longest case), this is currently not relevant
 743                  * as the firmware wakes up around 2ms before the TBTT.
 744                  */
 745                 dtim_offs = vif->bss_conf.sync_dtim_count *
 746                                 vif->bss_conf.beacon_int;
 747                 /* convert TU to usecs */
 748                 dtim_offs *= 1024;
 749
 750                 ctxt_sta->dtim_tsf =
 751                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 752                 ctxt_sta->dtim_time =
 753                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 754
 755                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 756                                le64_to_cpu(ctxt_sta->dtim_tsf),
 757                                le32_to_cpu(ctxt_sta->dtim_time),
 758                                dtim_offs);
 759
 760                 ctxt_sta->is_assoc = cpu_to_le32(1);
 761         } else {
 762                 ctxt_sta->is_assoc = cpu_to_le32(0);
 763
 764                 /* Allow beacons to pass through as long as we are not
 765                  * associated, or we do not have dtim period information.
 766                  */
 767                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 768         }
 769
 770         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 771         ctxt_sta->bi_reciprocal =
 772                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 773         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 774                                               vif->bss_conf.dtim_period);
 775         ctxt_sta->dtim_reciprocal =
 776                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 777                                                vif->bss_conf.dtim_period));
 778
 779         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 780         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 781
 782         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 783 }
 784
 785 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 786                                          struct ieee80211_vif *vif,
 787                                          u32 action)
 788 {
 789         struct iwl_mac_ctx_cmd cmd = {};
 790
 791         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 792
 793         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 794
 795         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 796                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 797                                        MAC_FILTER_IN_BEACON |
 798                                        MAC_FILTER_IN_PROBE_REQUEST |
 799                                        MAC_FILTER_IN_CRC32);
 800         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 801
 802         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 803 }
 804
 805 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 806                                      struct ieee80211_vif *vif,
 807                                      u32 action)
 808 {
 809         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 810         struct iwl_mac_ctx_cmd cmd = {};
 811
 812         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 813
 814         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 815
 816         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 817                                        MAC_FILTER_IN_PROBE_REQUEST);
 818
 819         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 820         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 821         cmd.ibss.bi_reciprocal =
 822                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 823
 824         /* TODO: Assumes that the beacon id == mac context id */
 825         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 826
 827         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 828 }
 829
 830 struct iwl_mvm_go_iterator_data {
 831         bool go_active;
 832 };
 833
 834 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 835 {
 836         struct iwl_mvm_go_iterator_data *data = _data;
 837         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 838
 839         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 840             mvmvif->ap_ibss_active)
 841                 data->go_active = true;
 842 }
 843
 844 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 845                                            struct ieee80211_vif *vif,
 846                                            u32 action)
 847 {
 848         struct iwl_mac_ctx_cmd cmd = {};
 849         struct iwl_mvm_go_iterator_data data = {};
 850
 851         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 852
 853         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 854
 855         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 856
 857         /* Override the filter flags to accept only probe requests */
 858         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 859
 860         /*
 861          * This flag should be set to true when the P2P Device is
 862          * discoverable and there is at least another active P2P GO. Settings
 863          * this flag will allow the P2P Device to be discoverable on other
 864          * channels in addition to its listen channel.
 865          * Note that this flag should not be set in other cases as it opens the
 866          * Rx filters on all MAC and increases the number of interrupts.
 867          */
 868         ieee80211_iterate_active_interfaces_atomic(
 869                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 870                 iwl_mvm_go_iterator, &data);
 871
 872         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 873         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 874 }
 875
 876 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 877                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 878                                      u8 *beacon, u32 frame_size)
 879 {
 880         u32 tim_idx;
 881         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 882
 883         /* The index is relative to frame start but we start looking at the
 884          * variable-length part of the beacon. */
 885         tim_idx = mgmt->u.beacon.variable - beacon;
 886
 887         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 888         while ((tim_idx < (frame_size - 2)) &&
 889                         (beacon[tim_idx] != WLAN_EID_TIM))
 890                 tim_idx += beacon[tim_idx+1] + 2;
 891
 892         /* If TIM field was found, set variables */
 893         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 894                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 895                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 896         } else {
 897                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 898         }
 899 }
 900
 901 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 902                                         struct ieee80211_vif *vif,
 903                                         struct sk_buff *beacon)
 904 {
 905         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 906         struct iwl_host_cmd cmd = {
 907                 .id = BEACON_TEMPLATE_CMD,
 908                 .flags = CMD_ASYNC,
 909         };
 910         struct iwl_mac_beacon_cmd beacon_cmd = {};
 911         struct ieee80211_tx_info *info;
 912         u32 beacon_skb_len;
 913         u32 rate, tx_flags;
 914
 915         if (WARN_ON(!beacon))
 916                 return -EINVAL;
 917
 918         beacon_skb_len = beacon->len;
 919
 920         /* TODO: for now the beacon template id is set to be the mac context id.
 921          * Might be better to handle it as another resource ... */
 922         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 923         info = IEEE80211_SKB_CB(beacon);
 924
 925         /* Set up TX command fields */
 926         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 927         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 928         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 929         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 930         tx_flags |=
 931                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 932                                                 TX_CMD_FLG_BT_PRIO_POS;
 933         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
 934
 935         mvm->mgmt_last_antenna_idx =
 936                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 937                                      mvm->mgmt_last_antenna_idx);
 938
 939         beacon_cmd.tx.rate_n_flags =
 940                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 941                             RATE_MCS_ANT_POS);
 942
 943         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 944                 rate = IWL_FIRST_OFDM_RATE;
 945         } else {
 946                 rate = IWL_FIRST_CCK_RATE;
 947                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 948         }
 949         beacon_cmd.tx.rate_n_flags |=
 950                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 951
 952         /* Set up TX beacon command fields */
 953         if (vif->type == NL80211_IFTYPE_AP)
 954                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 955                                          beacon->data,
 956                                          beacon_skb_len);
 957
 958         /* Submit command */
 959         cmd.len[0] = sizeof(beacon_cmd);
 960         cmd.data[0] = &beacon_cmd;
 961         cmd.dataflags[0] = 0;
 962         cmd.len[1] = beacon_skb_len;
 963         cmd.data[1] = beacon->data;
 964         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 965
 966         return iwl_mvm_send_cmd(mvm, &cmd);
 967 }
 968
 969 /* The beacon template for the AP/GO/IBSS has changed and needs update */
 970 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
 971                                     struct ieee80211_vif *vif)
 972 {
 973         struct sk_buff *beacon;
 974         int ret;
 975
 976         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 977                 vif->type != NL80211_IFTYPE_ADHOC);
 978
 979         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
 980         if (!beacon)
 981                 return -ENOMEM;
 982
 983         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
 984         dev_kfree_skb(beacon);
 985         return ret;
 986 }
 987
 988 struct iwl_mvm_mac_ap_iterator_data {
 989         struct iwl_mvm *mvm;
 990         struct ieee80211_vif *vif;
 991         u32 beacon_device_ts;
 992         u16 beacon_int;
 993 };
 994
 995 /* Find the beacon_device_ts and beacon_int for a managed interface */
 996 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
 997                                     struct ieee80211_vif *vif)
 998 {
 999         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1000
1001         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1002                 return;
1003
1004         /* Station client has higher priority over P2P client*/
1005         if (vif->p2p && data->beacon_device_ts)
1006                 return;
1007
1008         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1009         data->beacon_int = vif->bss_conf.beacon_int;
1010 }
1011
1012 /*
1013  * Fill the specific data for mac context of type AP of P2P GO
1014  */
1015 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1016                                          struct ieee80211_vif *vif,
1017                                          struct iwl_mac_data_ap *ctxt_ap,
1018                                          bool add)
1019 {
1020         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1021         struct iwl_mvm_mac_ap_iterator_data data = {
1022                 .mvm = mvm,
1023                 .vif = vif,
1024                 .beacon_device_ts = 0
1025         };
1026
1027         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1028         ctxt_ap->bi_reciprocal =
1029                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1030         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1031                                              vif->bss_conf.dtim_period);
1032         ctxt_ap->dtim_reciprocal =
1033                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1034                                                vif->bss_conf.dtim_period));
1035
1036         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1037
1038         /*
1039          * Only set the beacon time when the MAC is being added, when we
1040          * just modify the MAC then we should keep the time -- the firmware
1041          * can otherwise have a "jumping" TBTT.
1042          */
1043         if (add) {
1044                 /*
1045                  * If there is a station/P2P client interface which is
1046                  * associated, set the AP's TBTT far enough from the station's
1047                  * TBTT. Otherwise, set it to the current system time
1048                  */
1049                 ieee80211_iterate_active_interfaces_atomic(
1050                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1051                         iwl_mvm_mac_ap_iterator, &data);
1052
1053                 if (data.beacon_device_ts) {
1054                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1055                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1056                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1057                                                      100);
1058                 } else {
1059                         mvmvif->ap_beacon_time =
1060                                 iwl_read_prph(mvm->trans,
1061                                               DEVICE_SYSTEM_TIME_REG);
1062                 }
1063         }
1064
1065         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1066         ctxt_ap->beacon_tsf = 0; /* unused */
1067
1068         /* TODO: Assume that the beacon id == mac context id */
1069         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1070 }
1071
1072 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1073                                    struct ieee80211_vif *vif,
1074                                    u32 action)
1075 {
1076         struct iwl_mac_ctx_cmd cmd = {};
1077
1078         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1079
1080         /* Fill the common data for all mac context types */
1081         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1082
1083         /*
1084          * pass probe requests and beacons from other APs (needed
1085          * for ht protection)
1086          */
1087         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1088                                         MAC_FILTER_IN_BEACON);
1089
1090         /* Fill the data specific for ap mode */
1091         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1092                                      action == FW_CTXT_ACTION_ADD);
1093
1094         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1095 }
1096
1097 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1098                                    struct ieee80211_vif *vif,
1099                                    u32 action)
1100 {
1101         struct iwl_mac_ctx_cmd cmd = {};
1102         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1103
1104         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1105
1106         /* Fill the common data for all mac context types */
1107         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1108
1109         /*
1110          * pass probe requests and beacons from other APs (needed
1111          * for ht protection)
1112          */
1113         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1114                                         MAC_FILTER_IN_BEACON);
1115
1116         /* Fill the data specific for GO mode */
1117         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1118                                      action == FW_CTXT_ACTION_ADD);
1119
1120         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1121                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1122         cmd.go.opp_ps_enabled =
1123                         cpu_to_le32(!!(noa->oppps_ctwindow &
1124                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1125
1126         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1127 }
1128
1129 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1130                                 u32 action, bool force_assoc_off,
1131                                 const u8 *bssid_override)
1132 {
1133         switch (vif->type) {
1134         case NL80211_IFTYPE_STATION:
1135                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1136                                                 force_assoc_off,
1137                                                 bssid_override);
1138                 break;
1139         case NL80211_IFTYPE_AP:
1140                 if (!vif->p2p)
1141                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1142                 else
1143                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1144                 break;
1145         case NL80211_IFTYPE_MONITOR:
1146                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1147         case NL80211_IFTYPE_P2P_DEVICE:
1148                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1149         case NL80211_IFTYPE_ADHOC:
1150                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1151         default:
1152                 break;
1153         }
1154
1155         return -EOPNOTSUPP;
1156 }
1157
1158 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1159 {
1160         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1161         int ret;
1162
1163         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1164                       vif->addr, ieee80211_vif_type_p2p(vif)))
1165                 return -EIO;
1166
1167         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1168                                    true, NULL);
1169         if (ret)
1170                 return ret;
1171
1172         /* will only do anything at resume from D3 time */
1173         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1174
1175         mvmvif->uploaded = true;
1176         return 0;
1177 }
1178
1179 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1180                              bool force_assoc_off, const u8 *bssid_override)
1181 {
1182         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1183
1184         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1185                       vif->addr, ieee80211_vif_type_p2p(vif)))
1186                 return -EIO;
1187
1188         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1189                                     force_assoc_off, bssid_override);
1190 }
1191
1192 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1193 {
1194         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1195         struct iwl_mac_ctx_cmd cmd;
1196         int ret;
1197
1198         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1199                       vif->addr, ieee80211_vif_type_p2p(vif)))
1200                 return -EIO;
1201
1202         memset(&cmd, 0, sizeof(cmd));
1203
1204         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1205                                                            mvmvif->color));
1206         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1207
1208         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1209                                    sizeof(cmd), &cmd);
1210         if (ret) {
1211                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1212                 return ret;
1213         }
1214
1215         mvmvif->uploaded = false;
1216
1217         if (vif->type == NL80211_IFTYPE_MONITOR)
1218                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1219
1220         return 0;
1221 }
1222
1223 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1224                                    struct ieee80211_vif *csa_vif, u32 gp2)
1225 {
1226         struct iwl_mvm_vif *mvmvif =
1227                         iwl_mvm_vif_from_mac80211(csa_vif);
1228
1229         if (!ieee80211_csa_is_complete(csa_vif)) {
1230                 int c = ieee80211_csa_update_counter(csa_vif);
1231
1232                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1233                 if (csa_vif->p2p &&
1234                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2) {
1235                         u32 rel_time = (c + 1) *
1236                                        csa_vif->bss_conf.beacon_int -
1237                                        IWL_MVM_CHANNEL_SWITCH_TIME;
1238                         u32 apply_time = gp2 + rel_time * 1024;
1239
1240                         iwl_mvm_schedule_csa_noa(mvm, csa_vif,
1241                                                  IWL_MVM_CHANNEL_SWITCH_TIME -
1242                                                  IWL_MVM_CHANNEL_SWITCH_MARGIN,
1243                                                  apply_time);
1244                 }
1245         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1246                 /* we don't have CSA NoA scheduled yet, switch now */
1247                 ieee80211_csa_finish(csa_vif);
1248                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1249         }
1250 }
1251
1252 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1253                             struct iwl_rx_cmd_buffer *rxb,
1254                             struct iwl_device_cmd *cmd)
1255 {
1256         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1257         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1258         struct ieee80211_vif *csa_vif;
1259         struct ieee80211_vif *tx_blocked_vif;
1260         u64 tsf;
1261
1262         lockdep_assert_held(&mvm->mutex);
1263
1264         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_CAPA_EXTENDED_BEACON) {
1265                 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1266
1267                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1268                 tsf = le64_to_cpu(beacon->tsf);
1269                 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1270         } else {
1271                 struct iwl_beacon_notif *beacon = (void *)pkt->data;
1272
1273                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1274                 tsf = le64_to_cpu(beacon->tsf);
1275         }
1276
1277         IWL_DEBUG_RX(mvm,
1278                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1279                      le16_to_cpu(beacon_notify_hdr->status.status) &
1280                                                                 TX_STATUS_MSK,
1281                      beacon_notify_hdr->failure_frame, tsf,
1282                      mvm->ap_last_beacon_gp2,
1283                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1284
1285         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1286                                             lockdep_is_held(&mvm->mutex));
1287         if (unlikely(csa_vif && csa_vif->csa_active))
1288                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2);
1289
1290         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1291                                                 lockdep_is_held(&mvm->mutex));
1292         if (unlikely(tx_blocked_vif)) {
1293                 struct iwl_mvm_vif *mvmvif =
1294                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1295
1296                 /*
1297                  * The channel switch is started and we have blocked the
1298                  * stations. If this is the first beacon (the timeout wasn't
1299                  * set), set the unblock timeout, otherwise countdown
1300                  */
1301                 if (!mvm->csa_tx_block_bcn_timeout)
1302                         mvm->csa_tx_block_bcn_timeout =
1303                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1304                 else
1305                         mvm->csa_tx_block_bcn_timeout--;
1306
1307                 /* Check if the timeout is expired, and unblock tx */
1308                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1309                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1310                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1311                 }
1312         }
1313
1314         return 0;
1315 }
1316
1317 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1318                                          struct ieee80211_vif *vif)
1319 {
1320         struct iwl_missed_beacons_notif *missed_beacons = _data;
1321         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1322
1323         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1324                 return;
1325
1326         /*
1327          * TODO: the threshold should be adjusted based on latency conditions,
1328          * and/or in case of a CS flow on one of the other AP vifs.
1329          */
1330         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1331              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1332                 ieee80211_beacon_loss(vif);
1333 }
1334
1335 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1336                                     struct iwl_rx_cmd_buffer *rxb,
1337                                     struct iwl_device_cmd *cmd)
1338 {
1339         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1340         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1341
1342         IWL_DEBUG_INFO(mvm,
1343                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1344                        le32_to_cpu(mb->mac_id),
1345                        le32_to_cpu(mb->consec_missed_beacons),
1346                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1347                        le32_to_cpu(mb->num_recvd_beacons),
1348                        le32_to_cpu(mb->num_expected_beacons));
1349
1350         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1351                                                    IEEE80211_IFACE_ITER_NORMAL,
1352                                                    iwl_mvm_beacon_loss_iterator,
1353                                                    mb);
1354         return 0;
1355 }