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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 - 2019 Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
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  20  * General Public License for more details.
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  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  33  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 - 2019 Intel Corporation
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  38  * modification, are permitted provided that the following conditions
  39  * are met:
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  42  *    notice, this list of conditions and the following disclaimer.
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  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
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  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64
  65 #include <linux/etherdevice.h>
  66 #include <net/mac80211.h>
  67 #include "iwl-io.h"
  68 #include "iwl-prph.h"
  69 #include "fw-api.h"
  70 #include "mvm.h"
  71 #include "time-event.h"
  72
  73 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  74         IWL_MVM_TX_FIFO_VO,
  75         IWL_MVM_TX_FIFO_VI,
  76         IWL_MVM_TX_FIFO_BE,
  77         IWL_MVM_TX_FIFO_BK,
  78 };
  79
  80 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
  81         IWL_GEN2_EDCA_TX_FIFO_VO,
  82         IWL_GEN2_EDCA_TX_FIFO_VI,
  83         IWL_GEN2_EDCA_TX_FIFO_BE,
  84         IWL_GEN2_EDCA_TX_FIFO_BK,
  85         IWL_GEN2_TRIG_TX_FIFO_VO,
  86         IWL_GEN2_TRIG_TX_FIFO_VI,
  87         IWL_GEN2_TRIG_TX_FIFO_BE,
  88         IWL_GEN2_TRIG_TX_FIFO_BK,
  89 };
  90
  91 struct iwl_mvm_mac_iface_iterator_data {
  92         struct iwl_mvm *mvm;
  93         struct ieee80211_vif *vif;
  94         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  95         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  96         enum iwl_tsf_id preferred_tsf;
  97         bool found_vif;
  98 };
  99
 100 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
 101                                     struct ieee80211_vif *vif)
 102 {
 103         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 104         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 105         u16 min_bi;
 106
 107         /* Skip the interface for which we are trying to assign a tsf_id  */
 108         if (vif == data->vif)
 109                 return;
 110
 111         /*
 112          * The TSF is a hardware/firmware resource, there are 4 and
 113          * the driver should assign and free them as needed. However,
 114          * there are cases where 2 MACs should share the same TSF ID
 115          * for the purpose of clock sync, an optimization to avoid
 116          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 117          * client in the system.
 118          *
 119          * The firmware will decide according to the MAC type which
 120          * will be the master and slave. Clients that need to sync
 121          * with a remote station will be the master, and an AP or GO
 122          * will be the slave.
 123          *
 124          * Depending on the new interface type it can be slaved to
 125          * or become the master of an existing interface.
 126          */
 127         switch (data->vif->type) {
 128         case NL80211_IFTYPE_STATION:
 129                 /*
 130                  * The new interface is a client, so if the one we're iterating
 131                  * is an AP, and the beacon interval of the AP is a multiple or
 132                  * divisor of the beacon interval of the client, the same TSF
 133                  * should be used to avoid drift between the new client and
 134                  * existing AP. The existing AP will get drift updates from the
 135                  * new client context in this case.
 136                  */
 137                 if (vif->type != NL80211_IFTYPE_AP ||
 138                     data->preferred_tsf != NUM_TSF_IDS ||
 139                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 140                         break;
 141
 142                 min_bi = min(data->vif->bss_conf.beacon_int,
 143                              vif->bss_conf.beacon_int);
 144
 145                 if (!min_bi)
 146                         break;
 147
 148                 if ((data->vif->bss_conf.beacon_int -
 149                      vif->bss_conf.beacon_int) % min_bi == 0) {
 150                         data->preferred_tsf = mvmvif->tsf_id;
 151                         return;
 152                 }
 153                 break;
 154
 155         case NL80211_IFTYPE_AP:
 156                 /*
 157                  * The new interface is AP/GO, so if its beacon interval is a
 158                  * multiple or a divisor of the beacon interval of an existing
 159                  * interface, it should get drift updates from an existing
 160                  * client or use the same TSF as an existing GO. There's no
 161                  * drift between TSFs internally but if they used different
 162                  * TSFs then a new client MAC could update one of them and
 163                  * cause drift that way.
 164                  */
 165                 if ((vif->type != NL80211_IFTYPE_AP &&
 166                      vif->type != NL80211_IFTYPE_STATION) ||
 167                     data->preferred_tsf != NUM_TSF_IDS ||
 168                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 169                         break;
 170
 171                 min_bi = min(data->vif->bss_conf.beacon_int,
 172                              vif->bss_conf.beacon_int);
 173
 174                 if (!min_bi)
 175                         break;
 176
 177                 if ((data->vif->bss_conf.beacon_int -
 178                      vif->bss_conf.beacon_int) % min_bi == 0) {
 179                         data->preferred_tsf = mvmvif->tsf_id;
 180                         return;
 181                 }
 182                 break;
 183         default:
 184                 /*
 185                  * For all other interface types there's no need to
 186                  * take drift into account. Either they're exclusive
 187                  * like IBSS and monitor, or we don't care much about
 188                  * their TSF (like P2P Device), but we won't be able
 189                  * to share the TSF resource.
 190                  */
 191                 break;
 192         }
 193
 194         /*
 195          * Unless we exited above, we can't share the TSF resource
 196          * that the virtual interface we're iterating over is using
 197          * with the new one, so clear the available bit and if this
 198          * was the preferred one, reset that as well.
 199          */
 200         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 201
 202         if (data->preferred_tsf == mvmvif->tsf_id)
 203                 data->preferred_tsf = NUM_TSF_IDS;
 204 }
 205
 206 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 207                                        struct ieee80211_vif *vif)
 208 {
 209         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 210         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 211
 212         /* Iterator may already find the interface being added -- skip it */
 213         if (vif == data->vif) {
 214                 data->found_vif = true;
 215                 return;
 216         }
 217
 218         /* Mark MAC IDs as used by clearing the available bit, and
 219          * (below) mark TSFs as used if their existing use is not
 220          * compatible with the new interface type.
 221          * No locking or atomic bit operations are needed since the
 222          * data is on the stack of the caller function.
 223          */
 224         __clear_bit(mvmvif->id, data->available_mac_ids);
 225
 226         /* find a suitable tsf_id */
 227         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 228 }
 229
 230 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 231                                     struct ieee80211_vif *vif)
 232 {
 233         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 234         struct iwl_mvm_mac_iface_iterator_data data = {
 235                 .mvm = mvm,
 236                 .vif = vif,
 237                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 238                 /* no preference yet */
 239                 .preferred_tsf = NUM_TSF_IDS,
 240         };
 241
 242         ieee80211_iterate_active_interfaces_atomic(
 243                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 244                 iwl_mvm_mac_tsf_id_iter, &data);
 245
 246         if (data.preferred_tsf != NUM_TSF_IDS)
 247                 mvmvif->tsf_id = data.preferred_tsf;
 248         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 249                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 250                                                 NUM_TSF_IDS);
 251 }
 252
 253 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, 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                 .found_vif = false,
 264         };
 265         int ret, i;
 266
 267         lockdep_assert_held(&mvm->mutex);
 268
 269         /*
 270          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 271          * and other resources.
 272          */
 273
 274         /*
 275          * Before the iterator, we start with all MAC IDs and TSFs available.
 276          *
 277          * During iteration, all MAC IDs are cleared that are in use by other
 278          * virtual interfaces, and all TSF IDs are cleared that can't be used
 279          * by this new virtual interface because they're used by an interface
 280          * that can't share it with the new one.
 281          * At the same time, we check if there's a preferred TSF in the case
 282          * that we should share it with another interface.
 283          */
 284
 285         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 286         switch (vif->type) {
 287         case NL80211_IFTYPE_ADHOC:
 288                 break;
 289         case NL80211_IFTYPE_STATION:
 290                 if (!vif->p2p)
 291                         break;
 292                 /* fall through */
 293         default:
 294                 __clear_bit(0, data.available_mac_ids);
 295         }
 296
 297         ieee80211_iterate_active_interfaces_atomic(
 298                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 299                 iwl_mvm_mac_iface_iterator, &data);
 300
 301         /*
 302          * In the case we're getting here during resume, it's similar to
 303          * firmware restart, and with RESUME_ALL the iterator will find
 304          * the vif being added already.
 305          * We don't want to reassign any IDs in either case since doing
 306          * so would probably assign different IDs (as interfaces aren't
 307          * necessarily added in the same order), but the old IDs were
 308          * preserved anyway, so skip ID assignment for both resume and
 309          * recovery.
 310          */
 311         if (data.found_vif)
 312                 return 0;
 313
 314         /* Therefore, in recovery, we can't get here */
 315         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 316                 return -EBUSY;
 317
 318         mvmvif->id = find_first_bit(data.available_mac_ids,
 319                                     NUM_MAC_INDEX_DRIVER);
 320         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 321                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 322                 ret = -EIO;
 323                 goto exit_fail;
 324         }
 325
 326         if (data.preferred_tsf != NUM_TSF_IDS)
 327                 mvmvif->tsf_id = data.preferred_tsf;
 328         else
 329                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 330                                                 NUM_TSF_IDS);
 331         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 332                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 333                 ret = -EIO;
 334                 goto exit_fail;
 335         }
 336
 337         mvmvif->color = 0;
 338
 339         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 340         mvmvif->time_event_data.id = TE_MAX;
 341
 342         /* No need to allocate data queues to P2P Device MAC and NAN.*/
 343         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 344                 return 0;
 345
 346         /* Allocate the CAB queue for softAP and GO interfaces */
 347         if (vif->type == NL80211_IFTYPE_AP ||
 348             vif->type == NL80211_IFTYPE_ADHOC) {
 349                 /*
 350                  * For TVQM this will be overwritten later with the FW assigned
 351                  * queue value (when queue is enabled).
 352                  */
 353                 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 354         }
 355
 356         mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
 357         mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
 358         mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
 359
 360         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 361                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 362
 363         return 0;
 364
 365 exit_fail:
 366         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 367         return ret;
 368 }
 369
 370 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 371                               struct ieee80211_vif *vif,
 372                               enum nl80211_band band,
 373                               u8 *cck_rates, u8 *ofdm_rates)
 374 {
 375         struct ieee80211_supported_band *sband;
 376         unsigned long basic = vif->bss_conf.basic_rates;
 377         int lowest_present_ofdm = 100;
 378         int lowest_present_cck = 100;
 379         u8 cck = 0;
 380         u8 ofdm = 0;
 381         int i;
 382
 383         sband = mvm->hw->wiphy->bands[band];
 384
 385         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 386                 int hw = sband->bitrates[i].hw_value;
 387                 if (hw >= IWL_FIRST_OFDM_RATE) {
 388                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 389                         if (lowest_present_ofdm > hw)
 390                                 lowest_present_ofdm = hw;
 391                 } else {
 392                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 393
 394                         cck |= BIT(hw);
 395                         if (lowest_present_cck > hw)
 396                                 lowest_present_cck = hw;
 397                 }
 398         }
 399
 400         /*
 401          * Now we've got the basic rates as bitmaps in the ofdm and cck
 402          * variables. This isn't sufficient though, as there might not
 403          * be all the right rates in the bitmap. E.g. if the only basic
 404          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 405          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 406          *
 407          *    [...] a STA responding to a received frame shall transmit
 408          *    its Control Response frame [...] at the highest rate in the
 409          *    BSSBasicRateSet parameter that is less than or equal to the
 410          *    rate of the immediately previous frame in the frame exchange
 411          *    sequence ([...]) and that is of the same modulation class
 412          *    ([...]) as the received frame. If no rate contained in the
 413          *    BSSBasicRateSet parameter meets these conditions, then the
 414          *    control frame sent in response to a received frame shall be
 415          *    transmitted at the highest mandatory rate of the PHY that is
 416          *    less than or equal to the rate of the received frame, and
 417          *    that is of the same modulation class as the received frame.
 418          *
 419          * As a consequence, we need to add all mandatory rates that are
 420          * lower than all of the basic rates to these bitmaps.
 421          */
 422
 423         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 424                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 425         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 426                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 427         /* 6M already there or needed so always add */
 428         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 429
 430         /*
 431          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 432          * Note, however:
 433          *  - if no CCK rates are basic, it must be ERP since there must
 434          *    be some basic rates at all, so they're OFDM => ERP PHY
 435          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 436          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 437          *  - if 5.5M is basic, 1M and 2M are mandatory
 438          *  - if 2M is basic, 1M is mandatory
 439          *  - if 1M is basic, that's the only valid ACK rate.
 440          * As a consequence, it's not as complicated as it sounds, just add
 441          * any lower rates to the ACK rate bitmap.
 442          */
 443         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 444                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 445         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 446                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 447         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 448                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 449         /* 1M already there or needed so always add */
 450         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 451
 452         *cck_rates = cck;
 453         *ofdm_rates = ofdm;
 454 }
 455
 456 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 457                                          struct ieee80211_vif *vif,
 458                                          struct iwl_mac_ctx_cmd *cmd)
 459 {
 460         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 461         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 462                                  IEEE80211_HT_OP_MODE_PROTECTION;
 463         /* The fw does not distinguish between ht and fat */
 464         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 465
 466         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 467         /*
 468          * See section 9.23.3.1 of IEEE 80211-2012.
 469          * Nongreenfield HT STAs Present is not supported.
 470          */
 471         switch (protection_mode) {
 472         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 473                 break;
 474         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 475         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 476                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 477                 break;
 478         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 479                 /* Protect when channel wider than 20MHz */
 480                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 481                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 482                 break;
 483         default:
 484                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 485                         protection_mode);
 486                 break;
 487         }
 488 }
 489
 490 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 491                                         struct ieee80211_vif *vif,
 492                                         struct iwl_mac_ctx_cmd *cmd,
 493                                         const u8 *bssid_override,
 494                                         u32 action)
 495 {
 496         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 497         struct ieee80211_chanctx_conf *chanctx;
 498         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 499                              IEEE80211_HT_OP_MODE_PROTECTION);
 500         u8 cck_ack_rates, ofdm_ack_rates;
 501         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 502         int i;
 503
 504         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 505                                                             mvmvif->color));
 506         cmd->action = cpu_to_le32(action);
 507
 508         switch (vif->type) {
 509         case NL80211_IFTYPE_STATION:
 510                 if (vif->p2p)
 511                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 512                 else
 513                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 514                 break;
 515         case NL80211_IFTYPE_AP:
 516                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 517                 break;
 518         case NL80211_IFTYPE_MONITOR:
 519                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 520                 break;
 521         case NL80211_IFTYPE_P2P_DEVICE:
 522                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 523                 break;
 524         case NL80211_IFTYPE_ADHOC:
 525                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 526                 break;
 527         default:
 528                 WARN_ON_ONCE(1);
 529         }
 530
 531         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 532
 533         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 534
 535         if (bssid)
 536                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 537         else
 538                 eth_broadcast_addr(cmd->bssid_addr);
 539
 540         rcu_read_lock();
 541         chanctx = rcu_dereference(vif->chanctx_conf);
 542         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 543                                             : NL80211_BAND_2GHZ,
 544                           &cck_ack_rates, &ofdm_ack_rates);
 545         rcu_read_unlock();
 546
 547         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 548         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 549
 550         cmd->cck_short_preamble =
 551                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 552                             MAC_FLG_SHORT_PREAMBLE : 0);
 553         cmd->short_slot =
 554                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 555                             MAC_FLG_SHORT_SLOT : 0);
 556
 557         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 558
 559         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 560                 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
 561                 u8 ucode_ac = iwl_mvm_mac80211_ac_to_ucode_ac(i);
 562
 563                 cmd->ac[ucode_ac].cw_min =
 564                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 565                 cmd->ac[ucode_ac].cw_max =
 566                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 567                 cmd->ac[ucode_ac].edca_txop =
 568                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 569                 cmd->ac[ucode_ac].aifsn = mvmvif->queue_params[i].aifs;
 570                 cmd->ac[ucode_ac].fifos_mask = BIT(txf);
 571         }
 572
 573         if (vif->bss_conf.qos)
 574                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 575
 576         if (vif->bss_conf.use_cts_prot)
 577                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 578
 579         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 580                        vif->bss_conf.use_cts_prot,
 581                        vif->bss_conf.ht_operation_mode);
 582         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 583                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 584         if (ht_enabled)
 585                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 586 }
 587
 588 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 589                                      struct iwl_mac_ctx_cmd *cmd)
 590 {
 591         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 592                                        sizeof(*cmd), cmd);
 593         if (ret)
 594                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 595                         le32_to_cpu(cmd->action), ret);
 596         return ret;
 597 }
 598
 599 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 600                                     struct ieee80211_vif *vif,
 601                                     u32 action, bool force_assoc_off,
 602                                     const u8 *bssid_override)
 603 {
 604         struct iwl_mac_ctx_cmd cmd = {};
 605         struct iwl_mac_data_sta *ctxt_sta;
 606
 607         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 608
 609         /* Fill the common data for all mac context types */
 610         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 611
 612         if (vif->p2p) {
 613                 struct ieee80211_p2p_noa_attr *noa =
 614                         &vif->bss_conf.p2p_noa_attr;
 615
 616                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 617                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 618                 ctxt_sta = &cmd.p2p_sta.sta;
 619         } else {
 620                 ctxt_sta = &cmd.sta;
 621         }
 622
 623         /* We need the dtim_period to set the MAC as associated */
 624         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 625             !force_assoc_off) {
 626                 u32 dtim_offs;
 627
 628                 /*
 629                  * The DTIM count counts down, so when it is N that means N
 630                  * more beacon intervals happen until the DTIM TBTT. Therefore
 631                  * add this to the current time. If that ends up being in the
 632                  * future, the firmware will handle it.
 633                  *
 634                  * Also note that the system_timestamp (which we get here as
 635                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 636                  * same offset in the frame -- the TSF is at the first symbol
 637                  * of the TSF, the system timestamp is at signal acquisition
 638                  * time. This means there's an offset between them of at most
 639                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 640                  * 384us in the longest case), this is currently not relevant
 641                  * as the firmware wakes up around 2ms before the TBTT.
 642                  */
 643                 dtim_offs = vif->bss_conf.sync_dtim_count *
 644                                 vif->bss_conf.beacon_int;
 645                 /* convert TU to usecs */
 646                 dtim_offs *= 1024;
 647
 648                 ctxt_sta->dtim_tsf =
 649                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 650                 ctxt_sta->dtim_time =
 651                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 652                 ctxt_sta->assoc_beacon_arrive_time =
 653                         cpu_to_le32(vif->bss_conf.sync_device_ts);
 654
 655                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 656                                le64_to_cpu(ctxt_sta->dtim_tsf),
 657                                le32_to_cpu(ctxt_sta->dtim_time),
 658                                dtim_offs);
 659
 660                 ctxt_sta->is_assoc = cpu_to_le32(1);
 661         } else {
 662                 ctxt_sta->is_assoc = cpu_to_le32(0);
 663
 664                 /* Allow beacons to pass through as long as we are not
 665                  * associated, or we do not have dtim period information.
 666                  */
 667                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 668         }
 669
 670         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 671         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 672                                               vif->bss_conf.dtim_period);
 673
 674         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 675         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 676
 677         if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 678                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 679
 680         if (vif->bss_conf.he_support && !iwlwifi_mod_params.disable_11ax) {
 681                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX);
 682                 if (vif->bss_conf.twt_requester && IWL_MVM_USE_TWT)
 683                         ctxt_sta->data_policy |= cpu_to_le32(TWT_SUPPORTED);
 684         }
 685
 686
 687         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 688 }
 689
 690 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 691                                          struct ieee80211_vif *vif,
 692                                          u32 action)
 693 {
 694         struct iwl_mac_ctx_cmd cmd = {};
 695         u32 tfd_queue_msk = BIT(mvm->snif_queue);
 696         int ret;
 697
 698         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 699
 700         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 701
 702         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 703                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 704                                        MAC_FILTER_IN_BEACON |
 705                                        MAC_FILTER_IN_PROBE_REQUEST |
 706                                        MAC_FILTER_IN_CRC32);
 707         ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 708
 709         /* Allocate sniffer station */
 710         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
 711                                        vif->type, IWL_STA_GENERAL_PURPOSE);
 712         if (ret)
 713                 return ret;
 714
 715         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 716 }
 717
 718 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 719                                      struct ieee80211_vif *vif,
 720                                      u32 action)
 721 {
 722         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 723         struct iwl_mac_ctx_cmd cmd = {};
 724
 725         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 726
 727         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 728
 729         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 730                                        MAC_FILTER_IN_PROBE_REQUEST);
 731
 732         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 733         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 734
 735         /* TODO: Assumes that the beacon id == mac context id */
 736         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 737
 738         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 739 }
 740
 741 struct iwl_mvm_go_iterator_data {
 742         bool go_active;
 743 };
 744
 745 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 746 {
 747         struct iwl_mvm_go_iterator_data *data = _data;
 748         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 749
 750         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 751             mvmvif->ap_ibss_active)
 752                 data->go_active = true;
 753 }
 754
 755 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 756                                            struct ieee80211_vif *vif,
 757                                            u32 action)
 758 {
 759         struct iwl_mac_ctx_cmd cmd = {};
 760         struct iwl_mvm_go_iterator_data data = {};
 761
 762         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 763
 764         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 765
 766         /* Override the filter flags to accept only probe requests */
 767         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 768
 769         /*
 770          * This flag should be set to true when the P2P Device is
 771          * discoverable and there is at least another active P2P GO. Settings
 772          * this flag will allow the P2P Device to be discoverable on other
 773          * channels in addition to its listen channel.
 774          * Note that this flag should not be set in other cases as it opens the
 775          * Rx filters on all MAC and increases the number of interrupts.
 776          */
 777         ieee80211_iterate_active_interfaces_atomic(
 778                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 779                 iwl_mvm_go_iterator, &data);
 780
 781         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 782         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 783 }
 784
 785 void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 786                               __le32 *tim_index, __le32 *tim_size,
 787                               u8 *beacon, u32 frame_size)
 788 {
 789         u32 tim_idx;
 790         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 791
 792         /* The index is relative to frame start but we start looking at the
 793          * variable-length part of the beacon. */
 794         tim_idx = mgmt->u.beacon.variable - beacon;
 795
 796         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 797         while ((tim_idx < (frame_size - 2)) &&
 798                         (beacon[tim_idx] != WLAN_EID_TIM))
 799                 tim_idx += beacon[tim_idx+1] + 2;
 800
 801         /* If TIM field was found, set variables */
 802         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 803                 *tim_index = cpu_to_le32(tim_idx);
 804                 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
 805         } else {
 806                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 807         }
 808 }
 809
 810 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
 811 {
 812         struct ieee80211_mgmt *mgmt = (void *)beacon;
 813         const u8 *ie;
 814
 815         if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
 816                 return 0;
 817
 818         frame_size -= mgmt->u.beacon.variable - beacon;
 819
 820         ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
 821         if (!ie)
 822                 return 0;
 823
 824         return ie - beacon;
 825 }
 826
 827 u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
 828                                     struct ieee80211_vif *vif)
 829 {
 830         u8 rate;
 831
 832         if (info->band == NL80211_BAND_5GHZ || vif->p2p)
 833                 rate = IWL_FIRST_OFDM_RATE;
 834         else
 835                 rate = IWL_FIRST_CCK_RATE;
 836
 837         return rate;
 838 }
 839
 840 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
 841                                     struct ieee80211_vif *vif,
 842                                     struct sk_buff *beacon,
 843                                     struct iwl_tx_cmd *tx)
 844 {
 845         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 846         struct ieee80211_tx_info *info;
 847         u8 rate;
 848         u32 tx_flags;
 849
 850         info = IEEE80211_SKB_CB(beacon);
 851
 852         /* Set up TX command fields */
 853         tx->len = cpu_to_le16((u16)beacon->len);
 854         tx->sta_id = mvmvif->bcast_sta.sta_id;
 855         tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 856         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 857         tx_flags |=
 858                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 859                                                 TX_CMD_FLG_BT_PRIO_POS;
 860         tx->tx_flags = cpu_to_le32(tx_flags);
 861
 862         if (!fw_has_capa(&mvm->fw->ucode_capa,
 863                          IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION))
 864                 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
 865
 866         tx->rate_n_flags =
 867                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 868                             RATE_MCS_ANT_POS);
 869
 870         rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
 871
 872         tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 873         if (rate == IWL_FIRST_CCK_RATE)
 874                 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 875
 876 }
 877
 878 int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
 879                                      struct sk_buff *beacon,
 880                                      void *data, int len)
 881 {
 882         struct iwl_host_cmd cmd = {
 883                 .id = BEACON_TEMPLATE_CMD,
 884                 .flags = CMD_ASYNC,
 885         };
 886
 887         cmd.len[0] = len;
 888         cmd.data[0] = data;
 889         cmd.dataflags[0] = 0;
 890         cmd.len[1] = beacon->len;
 891         cmd.data[1] = beacon->data;
 892         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 893
 894         return iwl_mvm_send_cmd(mvm, &cmd);
 895 }
 896
 897 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm,
 898                                            struct ieee80211_vif *vif,
 899                                            struct sk_buff *beacon)
 900 {
 901         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 902         struct iwl_mac_beacon_cmd_v6 beacon_cmd = {};
 903
 904         iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
 905
 906         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 907
 908         if (vif->type == NL80211_IFTYPE_AP)
 909                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
 910                                          &beacon_cmd.tim_size,
 911                                          beacon->data, beacon->len);
 912
 913         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
 914                                                 sizeof(beacon_cmd));
 915 }
 916
 917 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm,
 918                                            struct ieee80211_vif *vif,
 919                                            struct sk_buff *beacon)
 920 {
 921         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 922         struct iwl_mac_beacon_cmd_v7 beacon_cmd = {};
 923
 924         iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
 925
 926         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 927
 928         if (vif->type == NL80211_IFTYPE_AP)
 929                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
 930                                          &beacon_cmd.tim_size,
 931                                          beacon->data, beacon->len);
 932
 933         beacon_cmd.csa_offset =
 934                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
 935                                                    WLAN_EID_CHANNEL_SWITCH,
 936                                                    beacon->len));
 937         beacon_cmd.ecsa_offset =
 938                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
 939                                                    WLAN_EID_EXT_CHANSWITCH_ANN,
 940                                                    beacon->len));
 941
 942         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
 943                                                 sizeof(beacon_cmd));
 944 }
 945
 946 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
 947                                            struct ieee80211_vif *vif,
 948                                            struct sk_buff *beacon)
 949 {
 950         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 951         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
 952         struct iwl_mac_beacon_cmd beacon_cmd = {};
 953         u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
 954         u16 flags;
 955
 956         flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
 957
 958         if (rate == IWL_FIRST_CCK_RATE)
 959                 flags |= IWL_MAC_BEACON_CCK;
 960
 961         beacon_cmd.flags = cpu_to_le16(flags);
 962         beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
 963         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 964
 965         if (vif->type == NL80211_IFTYPE_AP)
 966                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
 967                                          &beacon_cmd.tim_size,
 968                                          beacon->data, beacon->len);
 969
 970         beacon_cmd.csa_offset =
 971                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
 972                                                    WLAN_EID_CHANNEL_SWITCH,
 973                                                    beacon->len));
 974         beacon_cmd.ecsa_offset =
 975                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
 976                                                    WLAN_EID_EXT_CHANSWITCH_ANN,
 977                                                    beacon->len));
 978
 979         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
 980                                                 sizeof(beacon_cmd));
 981 }
 982
 983 int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 984                                  struct ieee80211_vif *vif,
 985                                  struct sk_buff *beacon)
 986 {
 987         if (WARN_ON(!beacon))
 988                 return -EINVAL;
 989
 990         if (IWL_MVM_NON_TRANSMITTING_AP)
 991                 return 0;
 992
 993         if (!fw_has_capa(&mvm->fw->ucode_capa,
 994                          IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
 995                 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
 996
 997         if (fw_has_api(&mvm->fw->ucode_capa,
 998                        IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
 999                 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
1000
1001         return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
1002 }
1003
1004 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1005 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1006                                     struct ieee80211_vif *vif)
1007 {
1008         struct sk_buff *beacon;
1009         int ret;
1010
1011         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1012                 vif->type != NL80211_IFTYPE_ADHOC);
1013
1014         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1015         if (!beacon)
1016                 return -ENOMEM;
1017
1018 #ifdef CONFIG_IWLWIFI_DEBUGFS
1019         if (mvm->beacon_inject_active)
1020                 return -EBUSY;
1021 #endif
1022
1023         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1024         dev_kfree_skb(beacon);
1025         return ret;
1026 }
1027
1028 struct iwl_mvm_mac_ap_iterator_data {
1029         struct iwl_mvm *mvm;
1030         struct ieee80211_vif *vif;
1031         u32 beacon_device_ts;
1032         u16 beacon_int;
1033 };
1034
1035 /* Find the beacon_device_ts and beacon_int for a managed interface */
1036 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1037                                     struct ieee80211_vif *vif)
1038 {
1039         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1040
1041         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1042                 return;
1043
1044         /* Station client has higher priority over P2P client*/
1045         if (vif->p2p && data->beacon_device_ts)
1046                 return;
1047
1048         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1049         data->beacon_int = vif->bss_conf.beacon_int;
1050 }
1051
1052 /*
1053  * Fill the specific data for mac context of type AP of P2P GO
1054  */
1055 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1056                                          struct ieee80211_vif *vif,
1057                                          struct iwl_mac_ctx_cmd *cmd,
1058                                          struct iwl_mac_data_ap *ctxt_ap,
1059                                          bool add)
1060 {
1061         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1062         struct iwl_mvm_mac_ap_iterator_data data = {
1063                 .mvm = mvm,
1064                 .vif = vif,
1065                 .beacon_device_ts = 0
1066         };
1067
1068         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
1069         cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
1070
1071         /*
1072          * in AP mode, pass probe requests and beacons from other APs
1073          * (needed for ht protection); when there're no any associated
1074          * station don't ask FW to pass beacons to prevent unnecessary
1075          * wake-ups.
1076          */
1077         cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1078         if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
1079                 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1080                 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1081         } else {
1082                 IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1083         }
1084
1085         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1086         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1087                                              vif->bss_conf.dtim_period);
1088
1089         if (!fw_has_api(&mvm->fw->ucode_capa,
1090                         IWL_UCODE_TLV_API_STA_TYPE))
1091                 ctxt_ap->mcast_qid = cpu_to_le32(mvmvif->cab_queue);
1092
1093         /*
1094          * Only set the beacon time when the MAC is being added, when we
1095          * just modify the MAC then we should keep the time -- the firmware
1096          * can otherwise have a "jumping" TBTT.
1097          */
1098         if (add) {
1099                 /*
1100                  * If there is a station/P2P client interface which is
1101                  * associated, set the AP's TBTT far enough from the station's
1102                  * TBTT. Otherwise, set it to the current system time
1103                  */
1104                 ieee80211_iterate_active_interfaces_atomic(
1105                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1106                         iwl_mvm_mac_ap_iterator, &data);
1107
1108                 if (data.beacon_device_ts) {
1109                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1110                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1111                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1112                                                      100);
1113                 } else {
1114                         mvmvif->ap_beacon_time = iwl_mvm_get_systime(mvm);
1115                 }
1116         }
1117
1118         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1119         ctxt_ap->beacon_tsf = 0; /* unused */
1120
1121         /* TODO: Assume that the beacon id == mac context id */
1122         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1123 }
1124
1125 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1126                                    struct ieee80211_vif *vif,
1127                                    u32 action)
1128 {
1129         struct iwl_mac_ctx_cmd cmd = {};
1130
1131         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1132
1133         /* Fill the common data for all mac context types */
1134         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1135
1136         /* Fill the data specific for ap mode */
1137         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap,
1138                                      action == FW_CTXT_ACTION_ADD);
1139
1140         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1141 }
1142
1143 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1144                                    struct ieee80211_vif *vif,
1145                                    u32 action)
1146 {
1147         struct iwl_mac_ctx_cmd cmd = {};
1148         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1149
1150         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1151
1152         /* Fill the common data for all mac context types */
1153         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1154
1155         /* Fill the data specific for GO mode */
1156         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap,
1157                                      action == FW_CTXT_ACTION_ADD);
1158
1159         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1160                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1161         cmd.go.opp_ps_enabled =
1162                         cpu_to_le32(!!(noa->oppps_ctwindow &
1163                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1164
1165         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1166 }
1167
1168 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1169                                 u32 action, bool force_assoc_off,
1170                                 const u8 *bssid_override)
1171 {
1172         switch (vif->type) {
1173         case NL80211_IFTYPE_STATION:
1174                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1175                                                 force_assoc_off,
1176                                                 bssid_override);
1177                 break;
1178         case NL80211_IFTYPE_AP:
1179                 if (!vif->p2p)
1180                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1181                 else
1182                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1183                 break;
1184         case NL80211_IFTYPE_MONITOR:
1185                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1186         case NL80211_IFTYPE_P2P_DEVICE:
1187                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1188         case NL80211_IFTYPE_ADHOC:
1189                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1190         default:
1191                 break;
1192         }
1193
1194         return -EOPNOTSUPP;
1195 }
1196
1197 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1198 {
1199         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1200         int ret;
1201
1202         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1203                       vif->addr, ieee80211_vif_type_p2p(vif)))
1204                 return -EIO;
1205
1206         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1207                                    true, NULL);
1208         if (ret)
1209                 return ret;
1210
1211         /* will only do anything at resume from D3 time */
1212         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1213
1214         mvmvif->uploaded = true;
1215         return 0;
1216 }
1217
1218 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1219                              bool force_assoc_off, const u8 *bssid_override)
1220 {
1221         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1222
1223         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1224                       vif->addr, ieee80211_vif_type_p2p(vif)))
1225                 return -EIO;
1226
1227         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1228                                     force_assoc_off, bssid_override);
1229 }
1230
1231 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1232 {
1233         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1234         struct iwl_mac_ctx_cmd cmd;
1235         int ret;
1236
1237         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1238                       vif->addr, ieee80211_vif_type_p2p(vif)))
1239                 return -EIO;
1240
1241         memset(&cmd, 0, sizeof(cmd));
1242
1243         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1244                                                            mvmvif->color));
1245         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1246
1247         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1248                                    sizeof(cmd), &cmd);
1249         if (ret) {
1250                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1251                 return ret;
1252         }
1253
1254         mvmvif->uploaded = false;
1255
1256         if (vif->type == NL80211_IFTYPE_MONITOR) {
1257                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1258                 iwl_mvm_dealloc_snif_sta(mvm);
1259         }
1260
1261         return 0;
1262 }
1263
1264 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1265                                    struct ieee80211_vif *csa_vif, u32 gp2,
1266                                    bool tx_success)
1267 {
1268         struct iwl_mvm_vif *mvmvif =
1269                         iwl_mvm_vif_from_mac80211(csa_vif);
1270
1271         /* Don't start to countdown from a failed beacon */
1272         if (!tx_success && !mvmvif->csa_countdown)
1273                 return;
1274
1275         mvmvif->csa_countdown = true;
1276
1277         if (!ieee80211_csa_is_complete(csa_vif)) {
1278                 int c = ieee80211_csa_update_counter(csa_vif);
1279
1280                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1281                 if (csa_vif->p2p &&
1282                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1283                     tx_success) {
1284                         u32 rel_time = (c + 1) *
1285                                        csa_vif->bss_conf.beacon_int -
1286                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1287                         u32 apply_time = gp2 + rel_time * 1024;
1288
1289                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1290                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1291                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1292                                          apply_time);
1293                 }
1294         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1295                 /* we don't have CSA NoA scheduled yet, switch now */
1296                 ieee80211_csa_finish(csa_vif);
1297                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1298         }
1299 }
1300
1301 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1302                              struct iwl_rx_cmd_buffer *rxb)
1303 {
1304         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1305         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1306         struct iwl_extended_beacon_notif_v5 *beacon_v5 = (void *)pkt->data;
1307         struct ieee80211_vif *csa_vif;
1308         struct ieee80211_vif *tx_blocked_vif;
1309         struct agg_tx_status *agg_status;
1310         u16 status;
1311
1312         lockdep_assert_held(&mvm->mutex);
1313
1314         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1315
1316         if (!iwl_mvm_is_short_beacon_notif_supported(mvm)) {
1317                 struct iwl_mvm_tx_resp *beacon_notify_hdr =
1318                         &beacon_v5->beacon_notify_hdr;
1319
1320                 mvm->ibss_manager = beacon_v5->ibss_mgr_status != 0;
1321                 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
1322                 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
1323                 IWL_DEBUG_RX(mvm,
1324                              "beacon status %#x retries:%d tsf:0x%016llX gp2:0x%X rate:%d\n",
1325                              status, beacon_notify_hdr->failure_frame,
1326                              le64_to_cpu(beacon->tsf),
1327                              mvm->ap_last_beacon_gp2,
1328                              le32_to_cpu(beacon_notify_hdr->initial_rate));
1329         } else {
1330                 mvm->ibss_manager = beacon->ibss_mgr_status != 0;
1331                 status = le32_to_cpu(beacon->status) & TX_STATUS_MSK;
1332                 IWL_DEBUG_RX(mvm,
1333                              "beacon status %#x tsf:0x%016llX gp2:0x%X\n",
1334                              status, le64_to_cpu(beacon->tsf),
1335                              mvm->ap_last_beacon_gp2);
1336         }
1337
1338         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1339                                             lockdep_is_held(&mvm->mutex));
1340         if (unlikely(csa_vif && csa_vif->csa_active))
1341                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1342                                        (status == TX_STATUS_SUCCESS));
1343
1344         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1345                                                 lockdep_is_held(&mvm->mutex));
1346         if (unlikely(tx_blocked_vif)) {
1347                 struct iwl_mvm_vif *mvmvif =
1348                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1349
1350                 /*
1351                  * The channel switch is started and we have blocked the
1352                  * stations. If this is the first beacon (the timeout wasn't
1353                  * set), set the unblock timeout, otherwise countdown
1354                  */
1355                 if (!mvm->csa_tx_block_bcn_timeout)
1356                         mvm->csa_tx_block_bcn_timeout =
1357                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1358                 else
1359                         mvm->csa_tx_block_bcn_timeout--;
1360
1361                 /* Check if the timeout is expired, and unblock tx */
1362                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1363                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1364                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1365                 }
1366         }
1367 }
1368
1369 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1370                                      struct iwl_rx_cmd_buffer *rxb)
1371 {
1372         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1373         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1374         struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1375         struct iwl_fw_dbg_trigger_tlv *trigger;
1376         u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1377         u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1378         struct ieee80211_vif *vif;
1379         u32 id = le32_to_cpu(mb->mac_id);
1380
1381         IWL_DEBUG_INFO(mvm,
1382                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1383                        le32_to_cpu(mb->mac_id),
1384                        le32_to_cpu(mb->consec_missed_beacons),
1385                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1386                        le32_to_cpu(mb->num_recvd_beacons),
1387                        le32_to_cpu(mb->num_expected_beacons));
1388
1389         rcu_read_lock();
1390
1391         vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
1392         if (!vif)
1393                 goto out;
1394
1395         rx_missed_bcon = le32_to_cpu(mb->consec_missed_beacons);
1396         rx_missed_bcon_since_rx =
1397                 le32_to_cpu(mb->consec_missed_beacons_since_last_rx);
1398         /*
1399          * TODO: the threshold should be adjusted based on latency conditions,
1400          * and/or in case of a CS flow on one of the other AP vifs.
1401          */
1402         if (rx_missed_bcon > IWL_MVM_MISSED_BEACONS_THRESHOLD_LONG)
1403                 iwl_mvm_connection_loss(mvm, vif, "missed beacons");
1404         else if (rx_missed_bcon_since_rx > IWL_MVM_MISSED_BEACONS_THRESHOLD)
1405                 ieee80211_beacon_loss(vif);
1406
1407         trigger = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1408                                         FW_DBG_TRIGGER_MISSED_BEACONS);
1409         if (!trigger)
1410                 goto out;
1411
1412         bcon_trig = (void *)trigger->data;
1413         stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1414         stop_trig_missed_bcon_since_rx =
1415                 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1416
1417         /* TODO: implement start trigger */
1418
1419         if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1420             rx_missed_bcon >= stop_trig_missed_bcon)
1421                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
1422
1423         iwl_fw_dbg_apply_point(&mvm->fwrt, IWL_FW_INI_APPLY_MISSED_BEACONS);
1424
1425 out:
1426         rcu_read_unlock();
1427 }
1428
1429 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1430                                     struct iwl_rx_cmd_buffer *rxb)
1431 {
1432         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1433         struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1434         struct ieee80211_rx_status rx_status;
1435         struct sk_buff *skb;
1436         u32 size = le32_to_cpu(sb->byte_count);
1437
1438         if (size == 0)
1439                 return;
1440
1441         skb = alloc_skb(size, GFP_ATOMIC);
1442         if (!skb) {
1443                 IWL_ERR(mvm, "alloc_skb failed\n");
1444                 return;
1445         }
1446
1447         /* update rx_status according to the notification's metadata */
1448         memset(&rx_status, 0, sizeof(rx_status));
1449         rx_status.mactime = le64_to_cpu(sb->tsf);
1450         /* TSF as indicated by the firmware  is at INA time */
1451         rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1452         rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1453         rx_status.band =
1454                 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1455                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1456         rx_status.freq =
1457                 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1458                                                rx_status.band);
1459
1460         /* copy the data */
1461         skb_put_data(skb, sb->data, size);
1462         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1463
1464         /* pass it as regular rx to mac80211 */
1465         ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1466 }
1467
1468 void iwl_mvm_probe_resp_data_notif(struct iwl_mvm *mvm,
1469                                    struct iwl_rx_cmd_buffer *rxb)
1470 {
1471         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1472         struct iwl_probe_resp_data_notif *notif = (void *)pkt->data;
1473         struct iwl_probe_resp_data *old_data, *new_data;
1474         int len = iwl_rx_packet_payload_len(pkt);
1475         u32 id = le32_to_cpu(notif->mac_id);
1476         struct ieee80211_vif *vif;
1477         struct iwl_mvm_vif *mvmvif;
1478
1479         if (WARN_ON_ONCE(len < sizeof(*notif)))
1480                 return;
1481
1482         IWL_DEBUG_INFO(mvm, "Probe response data notif: noa %d, csa %d\n",
1483                        notif->noa_active, notif->csa_counter);
1484
1485         vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, false);
1486         if (!vif)
1487                 return;
1488
1489         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1490
1491         new_data = kzalloc(sizeof(*new_data), GFP_KERNEL);
1492         if (!new_data)
1493                 return;
1494
1495         memcpy(&new_data->notif, notif, sizeof(new_data->notif));
1496
1497         /* noa_attr contains 1 reserved byte, need to substruct it */
1498         new_data->noa_len = sizeof(struct ieee80211_vendor_ie) +
1499                             sizeof(new_data->notif.noa_attr) - 1;
1500
1501         /*
1502          * If it's a one time NoA, only one descriptor is needed,
1503          * adjust the length according to len_low.
1504          */
1505         if (new_data->notif.noa_attr.len_low ==
1506             sizeof(struct ieee80211_p2p_noa_desc) + 2)
1507                 new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc);
1508
1509         old_data = rcu_dereference_protected(mvmvif->probe_resp_data,
1510                                         lockdep_is_held(&mvmvif->mvm->mutex));
1511         rcu_assign_pointer(mvmvif->probe_resp_data, new_data);
1512
1513         if (old_data)
1514                 kfree_rcu(old_data, rcu_head);
1515
1516         if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA &&
1517             notif->csa_counter >= 1)
1518                 ieee80211_csa_set_counter(vif, notif->csa_counter);
1519 }
1520
1521 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1522                                       struct iwl_rx_cmd_buffer *rxb)
1523 {
1524         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1525         struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1526         struct ieee80211_vif *csa_vif, *vif;
1527         struct iwl_mvm_vif *mvmvif;
1528         int len = iwl_rx_packet_payload_len(pkt);
1529         u32 id_n_color, csa_id, mac_id;
1530
1531         if (WARN_ON_ONCE(len < sizeof(*notif)))
1532                 return;
1533
1534         id_n_color = le32_to_cpu(notif->id_and_color);
1535         mac_id = id_n_color & FW_CTXT_ID_MSK;
1536
1537         if (WARN_ON_ONCE(mac_id >= NUM_MAC_INDEX_DRIVER))
1538                 return;
1539
1540         rcu_read_lock();
1541         vif = rcu_dereference(mvm->vif_id_to_mac[mac_id]);
1542         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1543
1544         switch (vif->type) {
1545         case NL80211_IFTYPE_AP:
1546                 csa_vif = rcu_dereference(mvm->csa_vif);
1547                 if (WARN_ON(!csa_vif || !csa_vif->csa_active ||
1548                             csa_vif != vif))
1549                         goto out_unlock;
1550
1551                 csa_id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
1552                 if (WARN(csa_id != id_n_color,
1553                          "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1554                          csa_id, id_n_color))
1555                         goto out_unlock;
1556
1557                 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1558
1559                 schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
1560                                       msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1561                                                        csa_vif->bss_conf.beacon_int));
1562
1563                 ieee80211_csa_finish(csa_vif);
1564
1565                 rcu_read_unlock();
1566
1567                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1568                 return;
1569         case NL80211_IFTYPE_STATION:
1570                 iwl_mvm_csa_client_absent(mvm, vif);
1571                 cancel_delayed_work(&mvmvif->csa_work);
1572                 ieee80211_chswitch_done(vif, true);
1573                 break;
1574         default:
1575                 /* should never happen */
1576                 WARN_ON_ONCE(1);
1577                 break;
1578         }
1579 out_unlock:
1580         rcu_read_unlock();
1581 }