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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <net/mac80211.h>
  66 #include "iwl-io.h"
  67 #include "iwl-prph.h"
  68 #include "fw-api.h"
  69 #include "mvm.h"
  70
  71 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  72         IWL_MVM_TX_FIFO_VO,
  73         IWL_MVM_TX_FIFO_VI,
  74         IWL_MVM_TX_FIFO_BE,
  75         IWL_MVM_TX_FIFO_BK,
  76 };
  77
  78 struct iwl_mvm_mac_iface_iterator_data {
  79         struct iwl_mvm *mvm;
  80         struct ieee80211_vif *vif;
  81         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  82         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  83         unsigned long used_hw_queues[BITS_TO_LONGS(IWL_MVM_MAX_QUEUES)];
  84         enum iwl_tsf_id preferred_tsf;
  85         bool found_vif;
  86 };
  87
  88 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  89                                     struct ieee80211_vif *vif)
  90 {
  91         struct iwl_mvm_mac_iface_iterator_data *data = _data;
  92         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  93
  94         /* Skip the interface for which we are trying to assign a tsf_id  */
  95         if (vif == data->vif)
  96                 return;
  97
  98         /*
  99          * The TSF is a hardware/firmware resource, there are 4 and
 100          * the driver should assign and free them as needed. However,
 101          * there are cases where 2 MACs should share the same TSF ID
 102          * for the purpose of clock sync, an optimization to avoid
 103          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 104          * client in the system.
 105          *
 106          * The firmware will decide according to the MAC type which
 107          * will be the master and slave. Clients that need to sync
 108          * with a remote station will be the master, and an AP or GO
 109          * will be the slave.
 110          *
 111          * Depending on the new interface type it can be slaved to
 112          * or become the master of an existing interface.
 113          */
 114         switch (data->vif->type) {
 115         case NL80211_IFTYPE_STATION:
 116                 /*
 117                  * The new interface is client, so if the existing one
 118                  * we're iterating is an AP, and both interfaces have the
 119                  * same beacon interval, the same TSF should be used to
 120                  * avoid drift between the new client and existing AP,
 121                  * the existing AP will get drift updates from the new
 122                  * client context in this case
 123                  */
 124                 if (vif->type == NL80211_IFTYPE_AP) {
 125                         if (data->preferred_tsf == NUM_TSF_IDS &&
 126                             test_bit(mvmvif->tsf_id, data->available_tsf_ids) &&
 127                             (vif->bss_conf.beacon_int ==
 128                              data->vif->bss_conf.beacon_int)) {
 129                                 data->preferred_tsf = mvmvif->tsf_id;
 130                                 return;
 131                         }
 132                 }
 133                 break;
 134         case NL80211_IFTYPE_AP:
 135                 /*
 136                  * The new interface is AP/GO, so in case both interfaces
 137                  * have the same beacon interval, it should get drift
 138                  * updates from an existing client or use the same
 139                  * TSF as an existing GO. There's no drift between
 140                  * TSFs internally but if they used different TSFs
 141                  * then a new client MAC could update one of them
 142                  * and cause drift that way.
 143                  */
 144                 if (vif->type == NL80211_IFTYPE_STATION ||
 145                     vif->type == NL80211_IFTYPE_AP) {
 146                         if (data->preferred_tsf == NUM_TSF_IDS &&
 147                             test_bit(mvmvif->tsf_id, data->available_tsf_ids) &&
 148                             (vif->bss_conf.beacon_int ==
 149                              data->vif->bss_conf.beacon_int)) {
 150                                 data->preferred_tsf = mvmvif->tsf_id;
 151                                 return;
 152                         }
 153                 }
 154                 break;
 155         default:
 156                 /*
 157                  * For all other interface types there's no need to
 158                  * take drift into account. Either they're exclusive
 159                  * like IBSS and monitor, or we don't care much about
 160                  * their TSF (like P2P Device), but we won't be able
 161                  * to share the TSF resource.
 162                  */
 163                 break;
 164         }
 165
 166         /*
 167          * Unless we exited above, we can't share the TSF resource
 168          * that the virtual interface we're iterating over is using
 169          * with the new one, so clear the available bit and if this
 170          * was the preferred one, reset that as well.
 171          */
 172         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 173
 174         if (data->preferred_tsf == mvmvif->tsf_id)
 175                 data->preferred_tsf = NUM_TSF_IDS;
 176 }
 177
 178 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 179                                        struct ieee80211_vif *vif)
 180 {
 181         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 182         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 183         u32 ac;
 184
 185         /* Iterator may already find the interface being added -- skip it */
 186         if (vif == data->vif) {
 187                 data->found_vif = true;
 188                 return;
 189         }
 190
 191         /* Mark the queues used by the vif */
 192         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 193                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 194                         __set_bit(vif->hw_queue[ac], data->used_hw_queues);
 195
 196         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 197                 __set_bit(vif->cab_queue, data->used_hw_queues);
 198
 199         /* Mark MAC IDs as used by clearing the available bit, and
 200          * (below) mark TSFs as used if their existing use is not
 201          * compatible with the new interface type.
 202          * No locking or atomic bit operations are needed since the
 203          * data is on the stack of the caller function.
 204          */
 205         __clear_bit(mvmvif->id, data->available_mac_ids);
 206
 207         /* find a suitable tsf_id */
 208         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 209 }
 210
 211 /*
 212  * Get the mask of the queus used by the vif
 213  */
 214 u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
 215                                 struct ieee80211_vif *vif)
 216 {
 217         u32 qmask = 0, ac;
 218
 219         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 220                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 221
 222         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 223                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 224                         qmask |= BIT(vif->hw_queue[ac]);
 225
 226         return qmask;
 227 }
 228
 229 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 230                                     struct ieee80211_vif *vif)
 231 {
 232         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 233         struct iwl_mvm_mac_iface_iterator_data data = {
 234                 .mvm = mvm,
 235                 .vif = vif,
 236                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 237                 /* no preference yet */
 238                 .preferred_tsf = NUM_TSF_IDS,
 239         };
 240
 241         ieee80211_iterate_active_interfaces_atomic(
 242                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 243                 iwl_mvm_mac_tsf_id_iter, &data);
 244
 245         if (data.preferred_tsf != NUM_TSF_IDS)
 246                 mvmvif->tsf_id = data.preferred_tsf;
 247         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 248                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 249                                                 NUM_TSF_IDS);
 250 }
 251
 252 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 253                                                struct ieee80211_vif *vif)
 254 {
 255         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 256         struct iwl_mvm_mac_iface_iterator_data data = {
 257                 .mvm = mvm,
 258                 .vif = vif,
 259                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 260                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 261                 /* no preference yet */
 262                 .preferred_tsf = NUM_TSF_IDS,
 263                 .used_hw_queues = {
 264                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 265                         BIT(mvm->aux_queue) |
 266                         BIT(IWL_MVM_CMD_QUEUE)
 267                 },
 268                 .found_vif = false,
 269         };
 270         u32 ac;
 271         int ret, i;
 272
 273         /*
 274          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 275          * and other resources.
 276          */
 277
 278         /*
 279          * Before the iterator, we start with all MAC IDs and TSFs available.
 280          *
 281          * During iteration, all MAC IDs are cleared that are in use by other
 282          * virtual interfaces, and all TSF IDs are cleared that can't be used
 283          * by this new virtual interface because they're used by an interface
 284          * that can't share it with the new one.
 285          * At the same time, we check if there's a preferred TSF in the case
 286          * that we should share it with another interface.
 287          */
 288
 289         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 290         switch (vif->type) {
 291         case NL80211_IFTYPE_ADHOC:
 292                 break;
 293         case NL80211_IFTYPE_STATION:
 294                 if (!vif->p2p)
 295                         break;
 296                 /* fall through */
 297         default:
 298                 __clear_bit(0, data.available_mac_ids);
 299         }
 300
 301         ieee80211_iterate_active_interfaces_atomic(
 302                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 303                 iwl_mvm_mac_iface_iterator, &data);
 304
 305         /*
 306          * In the case we're getting here during resume, it's similar to
 307          * firmware restart, and with RESUME_ALL the iterator will find
 308          * the vif being added already.
 309          * We don't want to reassign any IDs in either case since doing
 310          * so would probably assign different IDs (as interfaces aren't
 311          * necessarily added in the same order), but the old IDs were
 312          * preserved anyway, so skip ID assignment for both resume and
 313          * recovery.
 314          */
 315         if (data.found_vif)
 316                 return 0;
 317
 318         /* Therefore, in recovery, we can't get here */
 319         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 320                 return -EBUSY;
 321
 322         mvmvif->id = find_first_bit(data.available_mac_ids,
 323                                     NUM_MAC_INDEX_DRIVER);
 324         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 325                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 326                 ret = -EIO;
 327                 goto exit_fail;
 328         }
 329
 330         if (data.preferred_tsf != NUM_TSF_IDS)
 331                 mvmvif->tsf_id = data.preferred_tsf;
 332         else
 333                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 334                                                 NUM_TSF_IDS);
 335         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 336                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 337                 ret = -EIO;
 338                 goto exit_fail;
 339         }
 340
 341         mvmvif->color = 0;
 342
 343         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 344         mvmvif->time_event_data.id = TE_MAX;
 345
 346         /* No need to allocate data queues to P2P Device MAC.*/
 347         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 348                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 349                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 350
 351                 return 0;
 352         }
 353
 354         /* Find available queues, and allocate them to the ACs */
 355         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 356                 u8 queue = find_first_zero_bit(data.used_hw_queues,
 357                                                mvm->first_agg_queue);
 358
 359                 if (queue >= mvm->first_agg_queue) {
 360                         IWL_ERR(mvm, "Failed to allocate queue\n");
 361                         ret = -EIO;
 362                         goto exit_fail;
 363                 }
 364
 365                 __set_bit(queue, data.used_hw_queues);
 366                 vif->hw_queue[ac] = queue;
 367         }
 368
 369         /* Allocate the CAB queue for softAP and GO interfaces */
 370         if (vif->type == NL80211_IFTYPE_AP) {
 371                 u8 queue = find_first_zero_bit(data.used_hw_queues,
 372                                                mvm->first_agg_queue);
 373
 374                 if (queue >= mvm->first_agg_queue) {
 375                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 376                         ret = -EIO;
 377                         goto exit_fail;
 378                 }
 379
 380                 vif->cab_queue = queue;
 381         } else {
 382                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 383         }
 384
 385         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 386         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 387
 388         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 389                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 390
 391         return 0;
 392
 393 exit_fail:
 394         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 395         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 396         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 397         return ret;
 398 }
 399
 400 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 401 {
 402         u32 ac;
 403         int ret;
 404
 405         lockdep_assert_held(&mvm->mutex);
 406
 407         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 408         if (ret)
 409                 return ret;
 410
 411         switch (vif->type) {
 412         case NL80211_IFTYPE_P2P_DEVICE:
 413                 iwl_trans_ac_txq_enable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
 414                                         IWL_MVM_TX_FIFO_VO);
 415                 break;
 416         case NL80211_IFTYPE_AP:
 417                 iwl_trans_ac_txq_enable(mvm->trans, vif->cab_queue,
 418                                         IWL_MVM_TX_FIFO_MCAST);
 419                 /* fall through */
 420         default:
 421                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 422                         iwl_trans_ac_txq_enable(mvm->trans, vif->hw_queue[ac],
 423                                                 iwl_mvm_ac_to_tx_fifo[ac]);
 424                 break;
 425         }
 426
 427         return 0;
 428 }
 429
 430 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 431 {
 432         int ac;
 433
 434         lockdep_assert_held(&mvm->mutex);
 435
 436         switch (vif->type) {
 437         case NL80211_IFTYPE_P2P_DEVICE:
 438                 iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE);
 439                 break;
 440         case NL80211_IFTYPE_AP:
 441                 iwl_trans_txq_disable(mvm->trans, vif->cab_queue);
 442                 /* fall through */
 443         default:
 444                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 445                         iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac]);
 446         }
 447 }
 448
 449 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 450                               struct ieee80211_vif *vif,
 451                               enum ieee80211_band band,
 452                               u8 *cck_rates, u8 *ofdm_rates)
 453 {
 454         struct ieee80211_supported_band *sband;
 455         unsigned long basic = vif->bss_conf.basic_rates;
 456         int lowest_present_ofdm = 100;
 457         int lowest_present_cck = 100;
 458         u8 cck = 0;
 459         u8 ofdm = 0;
 460         int i;
 461
 462         sband = mvm->hw->wiphy->bands[band];
 463
 464         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 465                 int hw = sband->bitrates[i].hw_value;
 466                 if (hw >= IWL_FIRST_OFDM_RATE) {
 467                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 468                         if (lowest_present_ofdm > hw)
 469                                 lowest_present_ofdm = hw;
 470                 } else {
 471                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 472
 473                         cck |= BIT(hw);
 474                         if (lowest_present_cck > hw)
 475                                 lowest_present_cck = hw;
 476                 }
 477         }
 478
 479         /*
 480          * Now we've got the basic rates as bitmaps in the ofdm and cck
 481          * variables. This isn't sufficient though, as there might not
 482          * be all the right rates in the bitmap. E.g. if the only basic
 483          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 484          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 485          *
 486          *    [...] a STA responding to a received frame shall transmit
 487          *    its Control Response frame [...] at the highest rate in the
 488          *    BSSBasicRateSet parameter that is less than or equal to the
 489          *    rate of the immediately previous frame in the frame exchange
 490          *    sequence ([...]) and that is of the same modulation class
 491          *    ([...]) as the received frame. If no rate contained in the
 492          *    BSSBasicRateSet parameter meets these conditions, then the
 493          *    control frame sent in response to a received frame shall be
 494          *    transmitted at the highest mandatory rate of the PHY that is
 495          *    less than or equal to the rate of the received frame, and
 496          *    that is of the same modulation class as the received frame.
 497          *
 498          * As a consequence, we need to add all mandatory rates that are
 499          * lower than all of the basic rates to these bitmaps.
 500          */
 501
 502         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 503                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 504         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 505                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 506         /* 6M already there or needed so always add */
 507         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 508
 509         /*
 510          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 511          * Note, however:
 512          *  - if no CCK rates are basic, it must be ERP since there must
 513          *    be some basic rates at all, so they're OFDM => ERP PHY
 514          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 515          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 516          *  - if 5.5M is basic, 1M and 2M are mandatory
 517          *  - if 2M is basic, 1M is mandatory
 518          *  - if 1M is basic, that's the only valid ACK rate.
 519          * As a consequence, it's not as complicated as it sounds, just add
 520          * any lower rates to the ACK rate bitmap.
 521          */
 522         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 523                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 524         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 525                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 526         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 527                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 528         /* 1M already there or needed so always add */
 529         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 530
 531         *cck_rates = cck;
 532         *ofdm_rates = ofdm;
 533 }
 534
 535 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 536                                          struct ieee80211_vif *vif,
 537                                          struct iwl_mac_ctx_cmd *cmd)
 538 {
 539         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 540         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 541                                  IEEE80211_HT_OP_MODE_PROTECTION;
 542         /* The fw does not distinguish between ht and fat */
 543         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 544
 545         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 546         /*
 547          * See section 9.23.3.1 of IEEE 80211-2012.
 548          * Nongreenfield HT STAs Present is not supported.
 549          */
 550         switch (protection_mode) {
 551         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 552                 break;
 553         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 554         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 555                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 556                 break;
 557         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 558                 /* Protect when channel wider than 20MHz */
 559                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 560                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 561                 break;
 562         default:
 563                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 564                         protection_mode);
 565                 break;
 566         }
 567 }
 568
 569 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 570                                         struct ieee80211_vif *vif,
 571                                         struct iwl_mac_ctx_cmd *cmd,
 572                                         u32 action)
 573 {
 574         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 575         struct ieee80211_chanctx_conf *chanctx;
 576         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 577                              IEEE80211_HT_OP_MODE_PROTECTION);
 578         u8 cck_ack_rates, ofdm_ack_rates;
 579         int i;
 580
 581         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 582                                                             mvmvif->color));
 583         cmd->action = cpu_to_le32(action);
 584
 585         switch (vif->type) {
 586         case NL80211_IFTYPE_STATION:
 587                 if (vif->p2p)
 588                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 589                 else
 590                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 591                 break;
 592         case NL80211_IFTYPE_AP:
 593                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 594                 break;
 595         case NL80211_IFTYPE_MONITOR:
 596                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 597                 break;
 598         case NL80211_IFTYPE_P2P_DEVICE:
 599                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 600                 break;
 601         case NL80211_IFTYPE_ADHOC:
 602                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 603                 break;
 604         default:
 605                 WARN_ON_ONCE(1);
 606         }
 607
 608         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 609
 610         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 611         if (vif->bss_conf.bssid)
 612                 memcpy(cmd->bssid_addr, vif->bss_conf.bssid, ETH_ALEN);
 613         else
 614                 eth_broadcast_addr(cmd->bssid_addr);
 615
 616         rcu_read_lock();
 617         chanctx = rcu_dereference(vif->chanctx_conf);
 618         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 619                                             : IEEE80211_BAND_2GHZ,
 620                           &cck_ack_rates, &ofdm_ack_rates);
 621         rcu_read_unlock();
 622
 623         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 624         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 625
 626         cmd->cck_short_preamble =
 627                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 628                             MAC_FLG_SHORT_PREAMBLE : 0);
 629         cmd->short_slot =
 630                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 631                             MAC_FLG_SHORT_SLOT : 0);
 632
 633         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 634                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 635
 636                 cmd->ac[txf].cw_min =
 637                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 638                 cmd->ac[txf].cw_max =
 639                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 640                 cmd->ac[txf].edca_txop =
 641                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 642                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 643                 cmd->ac[txf].fifos_mask = BIT(txf);
 644         }
 645
 646         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 647         if (vif->type == NL80211_IFTYPE_AP)
 648                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 649                         BIT(IWL_MVM_TX_FIFO_MCAST);
 650
 651         if (vif->bss_conf.qos)
 652                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 653
 654         /* Don't use cts to self as the fw doesn't support it currently. */
 655         if (vif->bss_conf.use_cts_prot) {
 656                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 657                 if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 8)
 658                         cmd->protection_flags |=
 659                                 cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN);
 660         }
 661         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 662                        vif->bss_conf.use_cts_prot,
 663                        vif->bss_conf.ht_operation_mode);
 664         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 665                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 666         if (ht_enabled)
 667                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 668
 669         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 670 }
 671
 672 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 673                                      struct iwl_mac_ctx_cmd *cmd)
 674 {
 675         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC,
 676                                        sizeof(*cmd), cmd);
 677         if (ret)
 678                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 679                         le32_to_cpu(cmd->action), ret);
 680         return ret;
 681 }
 682
 683 /*
 684  * Fill the specific data for mac context of type station or p2p client
 685  */
 686 static void iwl_mvm_mac_ctxt_cmd_fill_sta(struct iwl_mvm *mvm,
 687                                           struct ieee80211_vif *vif,
 688                                           struct iwl_mac_data_sta *ctxt_sta,
 689                                           bool force_assoc_off)
 690 {
 691         /* We need the dtim_period to set the MAC as associated */
 692         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 693             !force_assoc_off) {
 694                 u32 dtim_offs;
 695
 696                 /*
 697                  * The DTIM count counts down, so when it is N that means N
 698                  * more beacon intervals happen until the DTIM TBTT. Therefore
 699                  * add this to the current time. If that ends up being in the
 700                  * future, the firmware will handle it.
 701                  *
 702                  * Also note that the system_timestamp (which we get here as
 703                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 704                  * same offset in the frame -- the TSF is at the first symbol
 705                  * of the TSF, the system timestamp is at signal acquisition
 706                  * time. This means there's an offset between them of at most
 707                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 708                  * 384us in the longest case), this is currently not relevant
 709                  * as the firmware wakes up around 2ms before the TBTT.
 710                  */
 711                 dtim_offs = vif->bss_conf.sync_dtim_count *
 712                                 vif->bss_conf.beacon_int;
 713                 /* convert TU to usecs */
 714                 dtim_offs *= 1024;
 715
 716                 ctxt_sta->dtim_tsf =
 717                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 718                 ctxt_sta->dtim_time =
 719                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 720
 721                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 722                                le64_to_cpu(ctxt_sta->dtim_tsf),
 723                                le32_to_cpu(ctxt_sta->dtim_time),
 724                                dtim_offs);
 725
 726                 ctxt_sta->is_assoc = cpu_to_le32(1);
 727         } else {
 728                 ctxt_sta->is_assoc = cpu_to_le32(0);
 729         }
 730
 731         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 732         ctxt_sta->bi_reciprocal =
 733                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 734         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 735                                               vif->bss_conf.dtim_period);
 736         ctxt_sta->dtim_reciprocal =
 737                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 738                                                vif->bss_conf.dtim_period));
 739
 740         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 741         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 742 }
 743
 744 static int iwl_mvm_mac_ctxt_cmd_station(struct iwl_mvm *mvm,
 745                                         struct ieee80211_vif *vif,
 746                                         u32 action)
 747 {
 748         struct iwl_mac_ctx_cmd cmd = {};
 749
 750         WARN_ON(vif->type != NL80211_IFTYPE_STATION || vif->p2p);
 751
 752         /* Fill the common data for all mac context types */
 753         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 754
 755         /* Allow beacons to pass through as long as we are not associated,or we
 756          * do not have dtim period information */
 757         if (!vif->bss_conf.assoc || !vif->bss_conf.dtim_period)
 758                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 759         else
 760                 cmd.filter_flags &= ~cpu_to_le32(MAC_FILTER_IN_BEACON);
 761
 762         /* Fill the data specific for station mode */
 763         iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.sta,
 764                                       action == FW_CTXT_ACTION_ADD);
 765
 766         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 767 }
 768
 769 static int iwl_mvm_mac_ctxt_cmd_p2p_client(struct iwl_mvm *mvm,
 770                                            struct ieee80211_vif *vif,
 771                                            u32 action)
 772 {
 773         struct iwl_mac_ctx_cmd cmd = {};
 774         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
 775
 776         WARN_ON(vif->type != NL80211_IFTYPE_STATION || !vif->p2p);
 777
 778         /* Fill the common data for all mac context types */
 779         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 780
 781         /* Fill the data specific for station mode */
 782         iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.p2p_sta.sta,
 783                                       action == FW_CTXT_ACTION_ADD);
 784
 785         cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 786                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 787
 788         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 789 }
 790
 791 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 792                                          struct ieee80211_vif *vif,
 793                                          u32 action)
 794 {
 795         struct iwl_mac_ctx_cmd cmd = {};
 796
 797         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 798
 799         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 800
 801         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 802                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 803                                        MAC_FILTER_IN_BEACON |
 804                                        MAC_FILTER_IN_PROBE_REQUEST |
 805                                        MAC_FILTER_IN_CRC32);
 806         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 807
 808         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 809 }
 810
 811 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 812                                      struct ieee80211_vif *vif,
 813                                      u32 action)
 814 {
 815         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 816         struct iwl_mac_ctx_cmd cmd = {};
 817
 818         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 819
 820         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 821
 822         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 823                                        MAC_FILTER_IN_PROBE_REQUEST);
 824
 825         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 826         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 827         cmd.ibss.bi_reciprocal =
 828                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 829
 830         /* TODO: Assumes that the beacon id == mac context id */
 831         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 832
 833         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 834 }
 835
 836 struct iwl_mvm_go_iterator_data {
 837         bool go_active;
 838 };
 839
 840 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 841 {
 842         struct iwl_mvm_go_iterator_data *data = _data;
 843         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 844
 845         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 846             mvmvif->ap_ibss_active)
 847                 data->go_active = true;
 848 }
 849
 850 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 851                                            struct ieee80211_vif *vif,
 852                                            u32 action)
 853 {
 854         struct iwl_mac_ctx_cmd cmd = {};
 855         struct iwl_mvm_go_iterator_data data = {};
 856
 857         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 858
 859         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 860
 861         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 862
 863         /* Override the filter flags to accept only probe requests */
 864         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 865
 866         /*
 867          * This flag should be set to true when the P2P Device is
 868          * discoverable and there is at least another active P2P GO. Settings
 869          * this flag will allow the P2P Device to be discoverable on other
 870          * channels in addition to its listen channel.
 871          * Note that this flag should not be set in other cases as it opens the
 872          * Rx filters on all MAC and increases the number of interrupts.
 873          */
 874         ieee80211_iterate_active_interfaces_atomic(
 875                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 876                 iwl_mvm_go_iterator, &data);
 877
 878         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 879         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 880 }
 881
 882 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 883                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 884                                      u8 *beacon, u32 frame_size)
 885 {
 886         u32 tim_idx;
 887         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 888
 889         /* The index is relative to frame start but we start looking at the
 890          * variable-length part of the beacon. */
 891         tim_idx = mgmt->u.beacon.variable - beacon;
 892
 893         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 894         while ((tim_idx < (frame_size - 2)) &&
 895                         (beacon[tim_idx] != WLAN_EID_TIM))
 896                 tim_idx += beacon[tim_idx+1] + 2;
 897
 898         /* If TIM field was found, set variables */
 899         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 900                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 901                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 902         } else {
 903                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 904         }
 905 }
 906
 907 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 908                                         struct ieee80211_vif *vif,
 909                                         struct sk_buff *beacon)
 910 {
 911         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 912         struct iwl_host_cmd cmd = {
 913                 .id = BEACON_TEMPLATE_CMD,
 914                 .flags = CMD_ASYNC,
 915         };
 916         struct iwl_mac_beacon_cmd beacon_cmd = {};
 917         struct ieee80211_tx_info *info;
 918         u32 beacon_skb_len;
 919         u32 rate;
 920
 921         if (WARN_ON(!beacon))
 922                 return -EINVAL;
 923
 924         beacon_skb_len = beacon->len;
 925
 926         /* TODO: for now the beacon template id is set to be the mac context id.
 927          * Might be better to handle it as another resource ... */
 928         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 929
 930         /* Set up TX command fields */
 931         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 932         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 933         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 934         beacon_cmd.tx.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 935                                              TX_CMD_FLG_BT_DIS  |
 936                                              TX_CMD_FLG_TSF);
 937
 938         mvm->mgmt_last_antenna_idx =
 939                 iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw),
 940                                      mvm->mgmt_last_antenna_idx);
 941
 942         beacon_cmd.tx.rate_n_flags =
 943                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 944                             RATE_MCS_ANT_POS);
 945
 946         info = IEEE80211_SKB_CB(beacon);
 947
 948         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 949                 rate = IWL_FIRST_OFDM_RATE;
 950         } else {
 951                 rate = IWL_FIRST_CCK_RATE;
 952                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 953         }
 954         beacon_cmd.tx.rate_n_flags |=
 955                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 956
 957         /* Set up TX beacon command fields */
 958         if (vif->type == NL80211_IFTYPE_AP)
 959                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 960                                          beacon->data,
 961                                          beacon_skb_len);
 962
 963         /* Submit command */
 964         cmd.len[0] = sizeof(beacon_cmd);
 965         cmd.data[0] = &beacon_cmd;
 966         cmd.dataflags[0] = 0;
 967         cmd.len[1] = beacon_skb_len;
 968         cmd.data[1] = beacon->data;
 969         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 970
 971         return iwl_mvm_send_cmd(mvm, &cmd);
 972 }
 973
 974 /* The beacon template for the AP/GO/IBSS has changed and needs update */
 975 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
 976                                     struct ieee80211_vif *vif)
 977 {
 978         struct sk_buff *beacon;
 979         int ret;
 980
 981         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 982                 vif->type != NL80211_IFTYPE_ADHOC);
 983
 984         beacon = ieee80211_beacon_get(mvm->hw, vif);
 985         if (!beacon)
 986                 return -ENOMEM;
 987
 988         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
 989         dev_kfree_skb(beacon);
 990         return ret;
 991 }
 992
 993 struct iwl_mvm_mac_ap_iterator_data {
 994         struct iwl_mvm *mvm;
 995         struct ieee80211_vif *vif;
 996         u32 beacon_device_ts;
 997         u16 beacon_int;
 998 };
 999
1000 /* Find the beacon_device_ts and beacon_int for a managed interface */
1001 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1002                                     struct ieee80211_vif *vif)
1003 {
1004         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1005
1006         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1007                 return;
1008
1009         /* Station client has higher priority over P2P client*/
1010         if (vif->p2p && data->beacon_device_ts)
1011                 return;
1012
1013         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1014         data->beacon_int = vif->bss_conf.beacon_int;
1015 }
1016
1017 /*
1018  * Fill the specific data for mac context of type AP of P2P GO
1019  */
1020 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1021                                          struct ieee80211_vif *vif,
1022                                          struct iwl_mac_data_ap *ctxt_ap,
1023                                          bool add)
1024 {
1025         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1026         struct iwl_mvm_mac_ap_iterator_data data = {
1027                 .mvm = mvm,
1028                 .vif = vif,
1029                 .beacon_device_ts = 0
1030         };
1031
1032         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1033         ctxt_ap->bi_reciprocal =
1034                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1035         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1036                                              vif->bss_conf.dtim_period);
1037         ctxt_ap->dtim_reciprocal =
1038                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1039                                                vif->bss_conf.dtim_period));
1040
1041         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1042
1043         /*
1044          * Only set the beacon time when the MAC is being added, when we
1045          * just modify the MAC then we should keep the time -- the firmware
1046          * can otherwise have a "jumping" TBTT.
1047          */
1048         if (add) {
1049                 /*
1050                  * If there is a station/P2P client interface which is
1051                  * associated, set the AP's TBTT far enough from the station's
1052                  * TBTT. Otherwise, set it to the current system time
1053                  */
1054                 ieee80211_iterate_active_interfaces_atomic(
1055                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1056                         iwl_mvm_mac_ap_iterator, &data);
1057
1058                 if (data.beacon_device_ts) {
1059                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1060                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1061                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1062                                                      100);
1063                 } else {
1064                         mvmvif->ap_beacon_time =
1065                                 iwl_read_prph(mvm->trans,
1066                                               DEVICE_SYSTEM_TIME_REG);
1067                 }
1068         }
1069
1070         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1071         ctxt_ap->beacon_tsf = 0; /* unused */
1072
1073         /* TODO: Assume that the beacon id == mac context id */
1074         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1075 }
1076
1077 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1078                                    struct ieee80211_vif *vif,
1079                                    u32 action)
1080 {
1081         struct iwl_mac_ctx_cmd cmd = {};
1082
1083         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1084
1085         /* Fill the common data for all mac context types */
1086         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
1087
1088         /* Also enable probe requests to pass */
1089         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1090
1091         /* Fill the data specific for ap mode */
1092         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1093                                      action == FW_CTXT_ACTION_ADD);
1094
1095         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1096 }
1097
1098 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1099                                    struct ieee80211_vif *vif,
1100                                    u32 action)
1101 {
1102         struct iwl_mac_ctx_cmd cmd = {};
1103         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1104
1105         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1106
1107         /* Fill the common data for all mac context types */
1108         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
1109
1110         /* Fill the data specific for GO mode */
1111         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1112                                      action == FW_CTXT_ACTION_ADD);
1113
1114         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1115                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1116         cmd.go.opp_ps_enabled =
1117                         cpu_to_le32(!!(noa->oppps_ctwindow &
1118                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1119
1120         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1121 }
1122
1123 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1124                                 u32 action)
1125 {
1126         switch (vif->type) {
1127         case NL80211_IFTYPE_STATION:
1128                 if (!vif->p2p)
1129                         return iwl_mvm_mac_ctxt_cmd_station(mvm, vif,
1130                                                             action);
1131                 else
1132                         return iwl_mvm_mac_ctxt_cmd_p2p_client(mvm, vif,
1133                                                                action);
1134                 break;
1135         case NL80211_IFTYPE_AP:
1136                 if (!vif->p2p)
1137                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1138                 else
1139                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1140                 break;
1141         case NL80211_IFTYPE_MONITOR:
1142                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1143         case NL80211_IFTYPE_P2P_DEVICE:
1144                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1145         case NL80211_IFTYPE_ADHOC:
1146                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1147         default:
1148                 break;
1149         }
1150
1151         return -EOPNOTSUPP;
1152 }
1153
1154 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1155 {
1156         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1157         int ret;
1158
1159         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1160                       vif->addr, ieee80211_vif_type_p2p(vif)))
1161                 return -EIO;
1162
1163         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD);
1164         if (ret)
1165                 return ret;
1166
1167         /* will only do anything at resume from D3 time */
1168         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1169
1170         mvmvif->uploaded = true;
1171         return 0;
1172 }
1173
1174 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1175 {
1176         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1177
1178         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1179                       vif->addr, ieee80211_vif_type_p2p(vif)))
1180                 return -EIO;
1181
1182         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY);
1183 }
1184
1185 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1186 {
1187         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1188         struct iwl_mac_ctx_cmd cmd;
1189         int ret;
1190
1191         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1192                       vif->addr, ieee80211_vif_type_p2p(vif)))
1193                 return -EIO;
1194
1195         memset(&cmd, 0, sizeof(cmd));
1196
1197         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1198                                                            mvmvif->color));
1199         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1200
1201         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC,
1202                                    sizeof(cmd), &cmd);
1203         if (ret) {
1204                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1205                 return ret;
1206         }
1207
1208         mvmvif->uploaded = false;
1209
1210         if (vif->type == NL80211_IFTYPE_MONITOR)
1211                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1212
1213         return 0;
1214 }
1215
1216 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1217                             struct iwl_rx_cmd_buffer *rxb,
1218                             struct iwl_device_cmd *cmd)
1219 {
1220         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1221         struct iwl_beacon_notif *beacon = (void *)pkt->data;
1222         u16 status __maybe_unused =
1223                 le16_to_cpu(beacon->beacon_notify_hdr.status.status);
1224         u32 rate __maybe_unused =
1225                 le32_to_cpu(beacon->beacon_notify_hdr.initial_rate);
1226
1227         IWL_DEBUG_RX(mvm, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n",
1228                      status & TX_STATUS_MSK,
1229                      beacon->beacon_notify_hdr.failure_frame,
1230                      le64_to_cpu(beacon->tsf),
1231                      rate);
1232         return 0;
1233 }
1234
1235 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1236                                          struct ieee80211_vif *vif)
1237 {
1238         struct iwl_missed_beacons_notif *missed_beacons = _data;
1239         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1240
1241         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1242                 return;
1243
1244         /*
1245          * TODO: the threshold should be adjusted based on latency conditions,
1246          * and/or in case of a CS flow on one of the other AP vifs.
1247          */
1248         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1249              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1250                 ieee80211_beacon_loss(vif);
1251 }
1252
1253 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1254                                     struct iwl_rx_cmd_buffer *rxb,
1255                                     struct iwl_device_cmd *cmd)
1256 {
1257         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1258         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1259
1260         IWL_DEBUG_INFO(mvm,
1261                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1262                        le32_to_cpu(mb->mac_id),
1263                        le32_to_cpu(mb->consec_missed_beacons),
1264                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1265                        le32_to_cpu(mb->num_recvd_beacons),
1266                        le32_to_cpu(mb->num_expected_beacons));
1267
1268         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1269                                                    IEEE80211_IFACE_ITER_NORMAL,
1270                                                    iwl_mvm_beacon_loss_iterator,
1271                                                    mb);
1272         return 0;
1273 }