drivers/net/wireless/iwlwifi/mvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87 #include "iwl-csr.h"
  88 #include "iwl-nvm-parse.h"
  89
  90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_AP) |
  98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  99                         BIT(NL80211_IFTYPE_P2P_GO),
 100         },
 101         {
 102                 .max = 1,
 103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 104         },
 105 };
 106
 107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 108         {
 109                 .num_different_channels = 2,
 110                 .max_interfaces = 3,
 111                 .limits = iwl_mvm_limits,
 112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 113         },
 114 };
 115
 116 #ifdef CONFIG_PM_SLEEP
 117 static const struct nl80211_wowlan_tcp_data_token_feature
 118 iwl_mvm_wowlan_tcp_token_feature = {
 119         .min_len = 0,
 120         .max_len = 255,
 121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 122 };
 123
 124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 127                             sizeof(struct ethhdr) -
 128                             sizeof(struct iphdr) -
 129                             sizeof(struct tcphdr),
 130         .data_interval_max = 65535, /* __le16 in API */
 131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 132                             sizeof(struct ethhdr) -
 133                             sizeof(struct iphdr) -
 134                             sizeof(struct tcphdr),
 135         .seq = true,
 136 };
 137 #endif
 138
 139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 140 /*
 141  * Use the reserved field to indicate magic values.
 142  * these values will only be used internally by the driver,
 143  * and won't make it to the fw (reserved will be 0).
 144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 145  *      be the vif's ip address. in case there is not a single
 146  *      ip address (0, or more than 1), this attribute will
 147  *      be skipped.
 148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 149  *      the LSB bytes of the vif's mac address
 150  */
 151 enum {
 152         BC_FILTER_MAGIC_NONE = 0,
 153         BC_FILTER_MAGIC_IP,
 154         BC_FILTER_MAGIC_MAC,
 155 };
 156
 157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 158         {
 159                 /* arp */
 160                 .discard = 0,
 161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 162                 .attrs = {
 163                         {
 164                                 /* frame type - arp, hw type - ethernet */
 165                                 .offset_type =
 166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 167                                 .offset = sizeof(rfc1042_header),
 168                                 .val = cpu_to_be32(0x08060001),
 169                                 .mask = cpu_to_be32(0xffffffff),
 170                         },
 171                         {
 172                                 /* arp dest ip */
 173                                 .offset_type =
 174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 175                                 .offset = sizeof(rfc1042_header) + 2 +
 176                                           sizeof(struct arphdr) +
 177                                           ETH_ALEN + sizeof(__be32) +
 178                                           ETH_ALEN,
 179                                 .mask = cpu_to_be32(0xffffffff),
 180                                 /* mark it as special field */
 181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 182                         },
 183                 },
 184         },
 185         {
 186                 /* dhcp offer bcast */
 187                 .discard = 0,
 188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 189                 .attrs = {
 190                         {
 191                                 /* udp dest port - 68 (bootp client)*/
 192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 193                                 .offset = offsetof(struct udphdr, dest),
 194                                 .val = cpu_to_be32(0x00440000),
 195                                 .mask = cpu_to_be32(0xffff0000),
 196                         },
 197                         {
 198                                 /* dhcp - lsb bytes of client hw address */
 199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 200                                 .offset = 38,
 201                                 .mask = cpu_to_be32(0xffffffff),
 202                                 /* mark it as special field */
 203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 204                         },
 205                 },
 206         },
 207         /* last filter must be empty */
 208         {},
 209 };
 210 #endif
 211
 212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 213 {
 214         if (!iwl_mvm_is_d0i3_supported(mvm))
 215                 return;
 216
 217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 218         spin_lock_bh(&mvm->refs_lock);
 219         mvm->refs[ref_type]++;
 220         spin_unlock_bh(&mvm->refs_lock);
 221         iwl_trans_ref(mvm->trans);
 222 }
 223
 224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 225 {
 226         if (!iwl_mvm_is_d0i3_supported(mvm))
 227                 return;
 228
 229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 230         spin_lock_bh(&mvm->refs_lock);
 231         WARN_ON(!mvm->refs[ref_type]--);
 232         spin_unlock_bh(&mvm->refs_lock);
 233         iwl_trans_unref(mvm->trans);
 234 }
 235
 236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 237                                      enum iwl_mvm_ref_type except_ref)
 238 {
 239         int i, j;
 240
 241         if (!iwl_mvm_is_d0i3_supported(mvm))
 242                 return;
 243
 244         spin_lock_bh(&mvm->refs_lock);
 245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 246                 if (except_ref == i || !mvm->refs[i])
 247                         continue;
 248
 249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 250                               i, mvm->refs[i]);
 251                 for (j = 0; j < mvm->refs[i]; j++)
 252                         iwl_trans_unref(mvm->trans);
 253                 mvm->refs[i] = 0;
 254         }
 255         spin_unlock_bh(&mvm->refs_lock);
 256 }
 257
 258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 259 {
 260         int i;
 261         bool taken = false;
 262
 263         if (!iwl_mvm_is_d0i3_supported(mvm))
 264                 return true;
 265
 266         spin_lock_bh(&mvm->refs_lock);
 267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 268                 if (mvm->refs[i]) {
 269                         taken = true;
 270                         break;
 271                 }
 272         }
 273         spin_unlock_bh(&mvm->refs_lock);
 274
 275         return taken;
 276 }
 277
 278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 279 {
 280         iwl_mvm_ref(mvm, ref_type);
 281
 282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 284                                 HZ)) {
 285                 WARN_ON_ONCE(1);
 286                 iwl_mvm_unref(mvm, ref_type);
 287                 return -EIO;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 294 {
 295         int i;
 296
 297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 298         for (i = 0; i < NUM_PHY_CTX; i++) {
 299                 mvm->phy_ctxts[i].id = i;
 300                 mvm->phy_ctxts[i].ref = 0;
 301         }
 302 }
 303
 304 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 305                                                   const char *alpha2,
 306                                                   enum iwl_mcc_source src_id,
 307                                                   bool *changed)
 308 {
 309         struct ieee80211_regdomain *regd = NULL;
 310         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 311         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 312         struct iwl_mcc_update_resp *resp;
 313
 314         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 315
 316         lockdep_assert_held(&mvm->mutex);
 317
 318         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 319         if (IS_ERR_OR_NULL(resp)) {
 320                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 321                               PTR_RET(resp));
 322                 goto out;
 323         }
 324
 325         if (changed)
 326                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 327
 328         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 329                                       __le32_to_cpu(resp->n_channels),
 330                                       resp->channels,
 331                                       __le16_to_cpu(resp->mcc));
 332         /* Store the return source id */
 333         src_id = resp->source_id;
 334         kfree(resp);
 335         if (IS_ERR_OR_NULL(regd)) {
 336                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 337                               PTR_RET(regd));
 338                 goto out;
 339         }
 340
 341         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 342                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 343         mvm->lar_regdom_set = true;
 344         mvm->mcc_src = src_id;
 345
 346 out:
 347         return regd;
 348 }
 349
 350 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 351 {
 352         bool changed;
 353         struct ieee80211_regdomain *regd;
 354
 355         if (!iwl_mvm_is_lar_supported(mvm))
 356                 return;
 357
 358         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 359         if (!IS_ERR_OR_NULL(regd)) {
 360                 /* only update the regulatory core if changed */
 361                 if (changed)
 362                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 363
 364                 kfree(regd);
 365         }
 366 }
 367
 368 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 369                                                           bool *changed)
 370 {
 371         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 372                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 373                                      MCC_SOURCE_GET_CURRENT :
 374                                      MCC_SOURCE_OLD_FW, changed);
 375 }
 376
 377 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 378 {
 379         enum iwl_mcc_source used_src;
 380         struct ieee80211_regdomain *regd;
 381         int ret;
 382         bool changed;
 383         const struct ieee80211_regdomain *r =
 384                         rtnl_dereference(mvm->hw->wiphy->regd);
 385
 386         if (!r)
 387                 return -ENOENT;
 388
 389         /* save the last source in case we overwrite it below */
 390         used_src = mvm->mcc_src;
 391         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 392                 /* Notify the firmware we support wifi location updates */
 393                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 394                 if (!IS_ERR_OR_NULL(regd))
 395                         kfree(regd);
 396         }
 397
 398         /* Now set our last stored MCC and source */
 399         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 400                                      &changed);
 401         if (IS_ERR_OR_NULL(regd))
 402                 return -EIO;
 403
 404         /* update cfg80211 if the regdomain was changed */
 405         if (changed)
 406                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 407         else
 408                 ret = 0;
 409
 410         kfree(regd);
 411         return ret;
 412 }
 413
 414 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 415 {
 416         struct ieee80211_hw *hw = mvm->hw;
 417         int num_mac, ret, i;
 418
 419         /* Tell mac80211 our characteristics */
 420         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 421                     IEEE80211_HW_SPECTRUM_MGMT |
 422                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 423                     IEEE80211_HW_QUEUE_CONTROL |
 424                     IEEE80211_HW_WANT_MONITOR_VIF |
 425                     IEEE80211_HW_SUPPORTS_PS |
 426                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 427                     IEEE80211_HW_AMPDU_AGGREGATION |
 428                     IEEE80211_HW_TIMING_BEACON_ONLY |
 429                     IEEE80211_HW_CONNECTION_MONITOR |
 430                     IEEE80211_HW_CHANCTX_STA_CSA |
 431                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 432
 433         hw->queues = mvm->first_agg_queue;
 434         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 435         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 436                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 437         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 438                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 439         hw->rate_control_algorithm = "iwl-mvm-rs";
 440         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 441         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 442
 443         /*
 444          * Enable 11w if advertised by firmware and software crypto
 445          * is not enabled (as the firmware will interpret some mgmt
 446          * packets, so enabling it with software crypto isn't safe)
 447          */
 448         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 449             !iwlwifi_mod_params.sw_crypto)
 450                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 451
 452         hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 453         hw->wiphy->features |=
 454                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 455                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 456
 457         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 458         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 459         hw->chanctx_data_size = sizeof(u16);
 460
 461         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 462                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 463                 BIT(NL80211_IFTYPE_AP) |
 464                 BIT(NL80211_IFTYPE_P2P_GO) |
 465                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 466                 BIT(NL80211_IFTYPE_ADHOC);
 467
 468         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 469         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 470         if (iwl_mvm_is_lar_supported(mvm))
 471                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 472         else
 473                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 474                                                REGULATORY_DISABLE_BEACON_HINTS;
 475
 476         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 477                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 478
 479         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 480
 481         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 482         hw->wiphy->n_iface_combinations =
 483                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 484
 485         hw->wiphy->max_remain_on_channel_duration = 10000;
 486         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 487         /* we can compensate an offset of up to 3 channels = 15 MHz */
 488         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 489
 490         /* Extract MAC address */
 491         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 492         hw->wiphy->addresses = mvm->addresses;
 493         hw->wiphy->n_addresses = 1;
 494
 495         /* Extract additional MAC addresses if available */
 496         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 497                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 498
 499         for (i = 1; i < num_mac; i++) {
 500                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 501                        ETH_ALEN);
 502                 mvm->addresses[i].addr[5]++;
 503                 hw->wiphy->n_addresses++;
 504         }
 505
 506         iwl_mvm_reset_phy_ctxts(mvm);
 507
 508         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 509
 510         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 511
 512         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 513                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 514
 515         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
 516                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 517         else
 518                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 519
 520         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 521                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 522                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 523         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
 524                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 525                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 526
 527                 if ((mvm->fw->ucode_capa.capa[0] &
 528                      IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 529                     (mvm->fw->ucode_capa.api[0] &
 530                      IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 531                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
 532                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 533         }
 534
 535         hw->wiphy->hw_version = mvm->trans->hw_id;
 536
 537         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 538                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 539         else
 540                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 541
 542         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 543         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 544         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 545         /* we create the 802.11 header and zero length SSID IE. */
 546         hw->wiphy->max_sched_scan_ie_len =
 547                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 548
 549         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 550                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 551                                NL80211_FEATURE_P2P_GO_OPPPS |
 552                                NL80211_FEATURE_DYNAMIC_SMPS |
 553                                NL80211_FEATURE_STATIC_SMPS |
 554                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 555
 556         if (mvm->fw->ucode_capa.capa[0] &
 557             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 558                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 559         if (mvm->fw->ucode_capa.capa[0] &
 560             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 561                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 562
 563         if (mvm->fw->ucode_capa.capa[0] &
 564             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 565                 hw->wiphy->features |=
 566                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 567
 568         if (mvm->fw->ucode_capa.capa[0] &
 569             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 570                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 571
 572         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 573
 574         /* currently FW API supports only one optional cipher scheme */
 575         if (mvm->fw->cs[0].cipher) {
 576                 mvm->hw->n_cipher_schemes = 1;
 577                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 578         }
 579
 580 #ifdef CONFIG_PM_SLEEP
 581         if (iwl_mvm_is_d0i3_supported(mvm) &&
 582             device_can_wakeup(mvm->trans->dev)) {
 583                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 584                 hw->wiphy->wowlan = &mvm->wowlan;
 585         }
 586
 587         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 588             mvm->trans->ops->d3_suspend &&
 589             mvm->trans->ops->d3_resume &&
 590             device_can_wakeup(mvm->trans->dev)) {
 591                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 592                                      WIPHY_WOWLAN_DISCONNECT |
 593                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 594                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 595                                      WIPHY_WOWLAN_NET_DETECT;
 596                 if (!iwlwifi_mod_params.sw_crypto)
 597                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 598                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 599                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 600
 601                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 602                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 603                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 604                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 605                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 606                 hw->wiphy->wowlan = &mvm->wowlan;
 607         }
 608 #endif
 609
 610 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 611         /* assign default bcast filtering configuration */
 612         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 613 #endif
 614
 615         ret = iwl_mvm_leds_init(mvm);
 616         if (ret)
 617                 return ret;
 618
 619         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 620                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 621                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 622         }
 623
 624         if (mvm->fw->ucode_capa.capa[0] &
 625             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
 626                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 627                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 628         }
 629
 630         ret = ieee80211_register_hw(mvm->hw);
 631         if (ret)
 632                 iwl_mvm_leds_exit(mvm);
 633
 634         return ret;
 635 }
 636
 637 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 638                              struct ieee80211_sta *sta,
 639                              struct sk_buff *skb)
 640 {
 641         struct iwl_mvm_sta *mvmsta;
 642         bool defer = false;
 643
 644         /*
 645          * double check the IN_D0I3 flag both before and after
 646          * taking the spinlock, in order to prevent taking
 647          * the spinlock when not needed.
 648          */
 649         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 650                 return false;
 651
 652         spin_lock(&mvm->d0i3_tx_lock);
 653         /*
 654          * testing the flag again ensures the skb dequeue
 655          * loop (on d0i3 exit) hasn't run yet.
 656          */
 657         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 658                 goto out;
 659
 660         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 661         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 662             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 663                 goto out;
 664
 665         __skb_queue_tail(&mvm->d0i3_tx, skb);
 666         ieee80211_stop_queues(mvm->hw);
 667
 668         /* trigger wakeup */
 669         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 670         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 671
 672         defer = true;
 673 out:
 674         spin_unlock(&mvm->d0i3_tx_lock);
 675         return defer;
 676 }
 677
 678 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 679                            struct ieee80211_tx_control *control,
 680                            struct sk_buff *skb)
 681 {
 682         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 683         struct ieee80211_sta *sta = control->sta;
 684         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 685         struct ieee80211_hdr *hdr = (void *)skb->data;
 686
 687         if (iwl_mvm_is_radio_killed(mvm)) {
 688                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 689                 goto drop;
 690         }
 691
 692         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 693             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 694             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 695                 goto drop;
 696
 697         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 698         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 699                      ieee80211_is_mgmt(hdr->frame_control) &&
 700                      !ieee80211_is_deauth(hdr->frame_control) &&
 701                      !ieee80211_is_disassoc(hdr->frame_control) &&
 702                      !ieee80211_is_action(hdr->frame_control)))
 703                 sta = NULL;
 704
 705         if (sta) {
 706                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 707                         return;
 708                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 709                         goto drop;
 710                 return;
 711         }
 712
 713         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 714                 goto drop;
 715         return;
 716  drop:
 717         ieee80211_free_txskb(hw, skb);
 718 }
 719
 720 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 721 {
 722         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 723                 return false;
 724         return true;
 725 }
 726
 727 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 728 {
 729         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 730                 return false;
 731         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 732                 return true;
 733
 734         /* enabled by default */
 735         return true;
 736 }
 737
 738 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 739                                     struct ieee80211_vif *vif,
 740                                     enum ieee80211_ampdu_mlme_action action,
 741                                     struct ieee80211_sta *sta, u16 tid,
 742                                     u16 *ssn, u8 buf_size)
 743 {
 744         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 745         int ret;
 746         bool tx_agg_ref = false;
 747
 748         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 749                      sta->addr, tid, action);
 750
 751         if (!(mvm->nvm_data->sku_cap_11n_enable))
 752                 return -EACCES;
 753
 754         /* return from D0i3 before starting a new Tx aggregation */
 755         switch (action) {
 756         case IEEE80211_AMPDU_TX_START:
 757         case IEEE80211_AMPDU_TX_STOP_CONT:
 758         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 759         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 760         case IEEE80211_AMPDU_TX_OPERATIONAL:
 761                 /*
 762                  * for tx start, wait synchronously until D0i3 exit to
 763                  * get the correct sequence number for the tid.
 764                  * additionally, some other ampdu actions use direct
 765                  * target access, which is not handled automatically
 766                  * by the trans layer (unlike commands), so wait for
 767                  * d0i3 exit in these cases as well.
 768                  */
 769                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 770                 if (ret)
 771                         return ret;
 772
 773                 tx_agg_ref = true;
 774                 break;
 775         default:
 776                 break;
 777         }
 778
 779         mutex_lock(&mvm->mutex);
 780
 781         switch (action) {
 782         case IEEE80211_AMPDU_RX_START:
 783                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 784                         ret = -EINVAL;
 785                         break;
 786                 }
 787                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 788                 break;
 789         case IEEE80211_AMPDU_RX_STOP:
 790                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 791                 break;
 792         case IEEE80211_AMPDU_TX_START:
 793                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 794                         ret = -EINVAL;
 795                         break;
 796                 }
 797                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 798                 break;
 799         case IEEE80211_AMPDU_TX_STOP_CONT:
 800                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 801                 break;
 802         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 803         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 804                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 805                 break;
 806         case IEEE80211_AMPDU_TX_OPERATIONAL:
 807                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 808                 break;
 809         default:
 810                 WARN_ON_ONCE(1);
 811                 ret = -EINVAL;
 812                 break;
 813         }
 814         mutex_unlock(&mvm->mutex);
 815
 816         /*
 817          * If the tid is marked as started, we won't use it for offloaded
 818          * traffic on the next D0i3 entry. It's safe to unref.
 819          */
 820         if (tx_agg_ref)
 821                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 822
 823         return ret;
 824 }
 825
 826 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 827                                      struct ieee80211_vif *vif)
 828 {
 829         struct iwl_mvm *mvm = data;
 830         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 831
 832         mvmvif->uploaded = false;
 833         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 834
 835         spin_lock_bh(&mvm->time_event_lock);
 836         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 837         spin_unlock_bh(&mvm->time_event_lock);
 838
 839         mvmvif->phy_ctxt = NULL;
 840         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 841 }
 842
 843 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 844                                      const void *data, size_t datalen)
 845 {
 846         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 847         ssize_t bytes_read;
 848         ssize_t bytes_read_trans;
 849
 850         if (offset < dump_ptrs->op_mode_len) {
 851                 bytes_read = min_t(ssize_t, count,
 852                                    dump_ptrs->op_mode_len - offset);
 853                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 854                        bytes_read);
 855                 offset += bytes_read;
 856                 count -= bytes_read;
 857
 858                 if (count == 0)
 859                         return bytes_read;
 860         } else {
 861                 bytes_read = 0;
 862         }
 863
 864         if (!dump_ptrs->trans_ptr)
 865                 return bytes_read;
 866
 867         offset -= dump_ptrs->op_mode_len;
 868         bytes_read_trans = min_t(ssize_t, count,
 869                                  dump_ptrs->trans_ptr->len - offset);
 870         memcpy(buffer + bytes_read,
 871                (u8 *)dump_ptrs->trans_ptr->data + offset,
 872                bytes_read_trans);
 873
 874         return bytes_read + bytes_read_trans;
 875 }
 876
 877 static void iwl_mvm_free_coredump(const void *data)
 878 {
 879         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 880
 881         vfree(fw_error_dump->op_mode_ptr);
 882         vfree(fw_error_dump->trans_ptr);
 883         kfree(fw_error_dump);
 884 }
 885
 886 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 887                                struct iwl_fw_error_dump_data **dump_data)
 888 {
 889         struct iwl_fw_error_dump_fifo *fifo_hdr;
 890         u32 *fifo_data;
 891         u32 fifo_len;
 892         unsigned long flags;
 893         int i, j;
 894
 895         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 896                 return;
 897
 898         /* Pull RXF data from all RXFs */
 899         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 900                 /*
 901                  * Keep aside the additional offset that might be needed for
 902                  * next RXF
 903                  */
 904                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 905
 906                 fifo_hdr = (void *)(*dump_data)->data;
 907                 fifo_data = (void *)fifo_hdr->data;
 908                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
 909
 910                 /* No need to try to read the data if the length is 0 */
 911                 if (fifo_len == 0)
 912                         continue;
 913
 914                 /* Add a TLV for the RXF */
 915                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 916                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 917
 918                 fifo_hdr->fifo_num = cpu_to_le32(i);
 919                 fifo_hdr->available_bytes =
 920                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 921                                                         RXF_RD_D_SPACE +
 922                                                         offset_diff));
 923                 fifo_hdr->wr_ptr =
 924                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 925                                                         RXF_RD_WR_PTR +
 926                                                         offset_diff));
 927                 fifo_hdr->rd_ptr =
 928                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 929                                                         RXF_RD_RD_PTR +
 930                                                         offset_diff));
 931                 fifo_hdr->fence_ptr =
 932                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 933                                                         RXF_RD_FENCE_PTR +
 934                                                         offset_diff));
 935                 fifo_hdr->fence_mode =
 936                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 937                                                         RXF_SET_FENCE_MODE +
 938                                                         offset_diff));
 939
 940                 /* Lock fence */
 941                 iwl_trans_write_prph(mvm->trans,
 942                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
 943                 /* Set fence pointer to the same place like WR pointer */
 944                 iwl_trans_write_prph(mvm->trans,
 945                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
 946                 /* Set fence offset */
 947                 iwl_trans_write_prph(mvm->trans,
 948                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
 949                                      0x0);
 950
 951                 /* Read FIFO */
 952                 fifo_len /= sizeof(u32); /* Size in DWORDS */
 953                 for (j = 0; j < fifo_len; j++)
 954                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
 955                                                          RXF_FIFO_RD_FENCE_INC +
 956                                                          offset_diff);
 957                 *dump_data = iwl_fw_error_next_data(*dump_data);
 958         }
 959
 960         /* Pull TXF data from all TXFs */
 961         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
 962                 /* Mark the number of TXF we're pulling now */
 963                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
 964
 965                 fifo_hdr = (void *)(*dump_data)->data;
 966                 fifo_data = (void *)fifo_hdr->data;
 967                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
 968
 969                 /* No need to try to read the data if the length is 0 */
 970                 if (fifo_len == 0)
 971                         continue;
 972
 973                 /* Add a TLV for the FIFO */
 974                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
 975                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 976
 977                 fifo_hdr->fifo_num = cpu_to_le32(i);
 978                 fifo_hdr->available_bytes =
 979                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 980                                                         TXF_FIFO_ITEM_CNT));
 981                 fifo_hdr->wr_ptr =
 982                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 983                                                         TXF_WR_PTR));
 984                 fifo_hdr->rd_ptr =
 985                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 986                                                         TXF_RD_PTR));
 987                 fifo_hdr->fence_ptr =
 988                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 989                                                         TXF_FENCE_PTR));
 990                 fifo_hdr->fence_mode =
 991                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 992                                                         TXF_LOCK_FENCE));
 993
 994                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
 995                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
 996                                      TXF_WR_PTR);
 997
 998                 /* Dummy-read to advance the read pointer to the head */
 999                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1000
1001                 /* Read FIFO */
1002                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1003                 for (j = 0; j < fifo_len; j++)
1004                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1005                                                           TXF_READ_MODIFY_DATA);
1006                 *dump_data = iwl_fw_error_next_data(*dump_data);
1007         }
1008
1009         iwl_trans_release_nic_access(mvm->trans, &flags);
1010 }
1011
1012 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1013 {
1014         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1015             !mvm->fw_dump_desc)
1016                 return;
1017
1018         kfree(mvm->fw_dump_desc);
1019         mvm->fw_dump_desc = NULL;
1020 }
1021
1022 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1023 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1024
1025 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1026 {
1027         struct iwl_fw_error_dump_file *dump_file;
1028         struct iwl_fw_error_dump_data *dump_data;
1029         struct iwl_fw_error_dump_info *dump_info;
1030         struct iwl_fw_error_dump_mem *dump_mem;
1031         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1032         struct iwl_mvm_dump_ptrs *fw_error_dump;
1033         u32 sram_len, sram_ofs;
1034         u32 file_len, fifo_data_len = 0;
1035         u32 smem_len = mvm->cfg->smem_len;
1036         u32 sram2_len = mvm->cfg->dccm2_len;
1037
1038         lockdep_assert_held(&mvm->mutex);
1039
1040         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1041         if (!fw_error_dump)
1042                 return;
1043
1044         /* SRAM - include stack CCM if driver knows the values for it */
1045         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1046                 const struct fw_img *img;
1047
1048                 img = &mvm->fw->img[mvm->cur_ucode];
1049                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1050                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1051         } else {
1052                 sram_ofs = mvm->cfg->dccm_offset;
1053                 sram_len = mvm->cfg->dccm_len;
1054         }
1055
1056         /* reading RXF/TXF sizes */
1057         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1058                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1059                 int i;
1060
1061                 fifo_data_len = 0;
1062
1063                 /* Count RXF size */
1064                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1065                         if (!mem_cfg->rxfifo_size[i])
1066                                 continue;
1067
1068                         /* Add header info */
1069                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1070                                          sizeof(*dump_data) +
1071                                          sizeof(struct iwl_fw_error_dump_fifo);
1072                 }
1073
1074                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1075                         if (!mem_cfg->txfifo_size[i])
1076                                 continue;
1077
1078                         /* Add header info */
1079                         fifo_data_len += mem_cfg->txfifo_size[i] +
1080                                          sizeof(*dump_data) +
1081                                          sizeof(struct iwl_fw_error_dump_fifo);
1082                 }
1083         }
1084
1085         file_len = sizeof(*dump_file) +
1086                    sizeof(*dump_data) * 2 +
1087                    sram_len + sizeof(*dump_mem) +
1088                    fifo_data_len +
1089                    sizeof(*dump_info);
1090
1091         /*
1092          * In 8000 HW family B-step include the ICCM (which resides separately)
1093          */
1094         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1095             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1096                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1097                             IWL8260_ICCM_LEN;
1098
1099         if (mvm->fw_dump_desc)
1100                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1101                             mvm->fw_dump_desc->len;
1102
1103         /* Make room for the SMEM, if it exists */
1104         if (smem_len)
1105                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1106
1107         /* Make room for the secondary SRAM, if it exists */
1108         if (sram2_len)
1109                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1110
1111         dump_file = vzalloc(file_len);
1112         if (!dump_file) {
1113                 kfree(fw_error_dump);
1114                 iwl_mvm_free_fw_dump_desc(mvm);
1115                 return;
1116         }
1117
1118         fw_error_dump->op_mode_ptr = dump_file;
1119
1120         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1121         dump_data = (void *)dump_file->data;
1122
1123         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1124         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1125         dump_info = (void *) dump_data->data;
1126         dump_info->device_family =
1127                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1128                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1129                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1130         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1131         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1132                sizeof(dump_info->fw_human_readable));
1133         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1134                 sizeof(dump_info->dev_human_readable));
1135         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1136                 sizeof(dump_info->bus_human_readable));
1137
1138         dump_data = iwl_fw_error_next_data(dump_data);
1139         /* We only dump the FIFOs if the FW is in error state */
1140         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1141                 iwl_mvm_dump_fifos(mvm, &dump_data);
1142
1143         if (mvm->fw_dump_desc) {
1144                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1145                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1146                                              mvm->fw_dump_desc->len);
1147                 dump_trig = (void *)dump_data->data;
1148                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1149                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1150
1151                 /* now we can free this copy */
1152                 iwl_mvm_free_fw_dump_desc(mvm);
1153                 dump_data = iwl_fw_error_next_data(dump_data);
1154         }
1155
1156         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1157         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1158         dump_mem = (void *)dump_data->data;
1159         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1160         dump_mem->offset = cpu_to_le32(sram_ofs);
1161         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1162                                  sram_len);
1163
1164         if (smem_len) {
1165                 dump_data = iwl_fw_error_next_data(dump_data);
1166                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1167                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1168                 dump_mem = (void *)dump_data->data;
1169                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1170                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1171                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1172                                          dump_mem->data, smem_len);
1173         }
1174
1175         if (sram2_len) {
1176                 dump_data = iwl_fw_error_next_data(dump_data);
1177                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1178                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1179                 dump_mem = (void *)dump_data->data;
1180                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1181                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1182                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1183                                          dump_mem->data, sram2_len);
1184         }
1185
1186         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1187             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1188                 dump_data = iwl_fw_error_next_data(dump_data);
1189                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1190                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1191                                              sizeof(*dump_mem));
1192                 dump_mem = (void *)dump_data->data;
1193                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1194                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1195                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1196                                          dump_mem->data, IWL8260_ICCM_LEN);
1197         }
1198
1199         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
1200         fw_error_dump->op_mode_len = file_len;
1201         if (fw_error_dump->trans_ptr)
1202                 file_len += fw_error_dump->trans_ptr->len;
1203         dump_file->file_len = cpu_to_le32(file_len);
1204
1205         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1206                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1207
1208         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1209 }
1210
1211 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1212         .trig_desc = {
1213                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1214         },
1215 };
1216
1217 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1218 {
1219         /* clear the D3 reconfig, we only need it to avoid dumping a
1220          * firmware coredump on reconfiguration, we shouldn't do that
1221          * on D3->D0 transition
1222          */
1223         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1224                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1225                 iwl_mvm_fw_error_dump(mvm);
1226         }
1227
1228         /* cleanup all stale references (scan, roc), but keep the
1229          * ucode_down ref until reconfig is complete
1230          */
1231         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1232
1233         iwl_trans_stop_device(mvm->trans);
1234
1235         mvm->scan_status = 0;
1236         mvm->ps_disabled = false;
1237         mvm->calibrating = false;
1238
1239         /* just in case one was running */
1240         ieee80211_remain_on_channel_expired(mvm->hw);
1241
1242         /*
1243          * cleanup all interfaces, even inactive ones, as some might have
1244          * gone down during the HW restart
1245          */
1246         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1247
1248         mvm->p2p_device_vif = NULL;
1249         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1250
1251         iwl_mvm_reset_phy_ctxts(mvm);
1252         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1253         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1254         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1255         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1256         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1257         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1258         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1259         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1260
1261         ieee80211_wake_queues(mvm->hw);
1262
1263         /* clear any stale d0i3 state */
1264         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1265
1266         mvm->vif_count = 0;
1267         mvm->rx_ba_sessions = 0;
1268         mvm->fw_dbg_conf = FW_DBG_INVALID;
1269
1270         /* keep statistics ticking */
1271         iwl_mvm_accu_radio_stats(mvm);
1272 }
1273
1274 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1275 {
1276         int ret;
1277
1278         lockdep_assert_held(&mvm->mutex);
1279
1280         /* Clean up some internal and mac80211 state on restart */
1281         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1282                 iwl_mvm_restart_cleanup(mvm);
1283
1284         ret = iwl_mvm_up(mvm);
1285
1286         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1287                 /* Something went wrong - we need to finish some cleanup
1288                  * that normally iwl_mvm_mac_restart_complete() below
1289                  * would do.
1290                  */
1291                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1292                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1293         }
1294
1295         return ret;
1296 }
1297
1298 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1299 {
1300         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1301         int ret;
1302
1303         /* Some hw restart cleanups must not hold the mutex */
1304         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1305                 /*
1306                  * Make sure we are out of d0i3. This is needed
1307                  * to make sure the reference accounting is correct
1308                  * (and there is no stale d0i3_exit_work).
1309                  */
1310                 wait_event_timeout(mvm->d0i3_exit_waitq,
1311                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1312                                              &mvm->status),
1313                                    HZ);
1314         }
1315
1316         mutex_lock(&mvm->mutex);
1317         ret = __iwl_mvm_mac_start(mvm);
1318         mutex_unlock(&mvm->mutex);
1319
1320         return ret;
1321 }
1322
1323 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1324 {
1325         int ret;
1326
1327         mutex_lock(&mvm->mutex);
1328
1329         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1330         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1331         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1332         if (ret)
1333                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1334                         ret);
1335
1336         /* allow transport/FW low power modes */
1337         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1338
1339         /*
1340          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1341          * of packets the FW sent out, so we must reconnect.
1342          */
1343         iwl_mvm_teardown_tdls_peers(mvm);
1344
1345         mutex_unlock(&mvm->mutex);
1346 }
1347
1348 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1349 {
1350         bool exit_now;
1351
1352         if (!iwl_mvm_is_d0i3_supported(mvm))
1353                 return;
1354
1355         mutex_lock(&mvm->d0i3_suspend_mutex);
1356         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1357         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1358                                         &mvm->d0i3_suspend_flags);
1359         mutex_unlock(&mvm->d0i3_suspend_mutex);
1360
1361         if (exit_now) {
1362                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1363                 _iwl_mvm_exit_d0i3(mvm);
1364         }
1365
1366         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1367                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1368                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1369                                                   &mvm->status),
1370                                         HZ))
1371                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1372 }
1373
1374 static void
1375 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1376                               enum ieee80211_reconfig_type reconfig_type)
1377 {
1378         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1379
1380         switch (reconfig_type) {
1381         case IEEE80211_RECONFIG_TYPE_RESTART:
1382                 iwl_mvm_restart_complete(mvm);
1383                 break;
1384         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1385                 iwl_mvm_resume_complete(mvm);
1386                 break;
1387         }
1388 }
1389
1390 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1391 {
1392         lockdep_assert_held(&mvm->mutex);
1393
1394         /* firmware counters are obviously reset now, but we shouldn't
1395          * partially track so also clear the fw_reset_accu counters.
1396          */
1397         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1398
1399         /*
1400          * Disallow low power states when the FW is down by taking
1401          * the UCODE_DOWN ref. in case of ongoing hw restart the
1402          * ref is already taken, so don't take it again.
1403          */
1404         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1405                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1406
1407         /* async_handlers_wk is now blocked */
1408
1409         /*
1410          * The work item could be running or queued if the
1411          * ROC time event stops just as we get here.
1412          */
1413         cancel_work_sync(&mvm->roc_done_wk);
1414
1415         iwl_trans_stop_device(mvm->trans);
1416
1417         iwl_mvm_async_handlers_purge(mvm);
1418         /* async_handlers_list is empty and will stay empty: HW is stopped */
1419
1420         /* the fw is stopped, the aux sta is dead: clean up driver state */
1421         iwl_mvm_del_aux_sta(mvm);
1422
1423         /*
1424          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1425          * won't be called in this case).
1426          */
1427         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1428
1429         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1430          * make sure there's nothing left there and warn if any is found.
1431          */
1432         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1433                 int i;
1434
1435                 for (i = 0; i < mvm->max_scans; i++) {
1436                         if (WARN_ONCE(mvm->scan_uid[i],
1437                                       "UMAC scan UID %d was not cleaned\n",
1438                                       mvm->scan_uid[i]))
1439                                 mvm->scan_uid[i] = 0;
1440                 }
1441         }
1442
1443         mvm->ucode_loaded = false;
1444 }
1445
1446 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1447 {
1448         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1449
1450         flush_work(&mvm->d0i3_exit_work);
1451         flush_work(&mvm->async_handlers_wk);
1452         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1453         iwl_mvm_free_fw_dump_desc(mvm);
1454
1455         mutex_lock(&mvm->mutex);
1456         __iwl_mvm_mac_stop(mvm);
1457         mutex_unlock(&mvm->mutex);
1458
1459         /*
1460          * The worker might have been waiting for the mutex, let it run and
1461          * discover that its list is now empty.
1462          */
1463         cancel_work_sync(&mvm->async_handlers_wk);
1464 }
1465
1466 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1467 {
1468         u16 i;
1469
1470         lockdep_assert_held(&mvm->mutex);
1471
1472         for (i = 0; i < NUM_PHY_CTX; i++)
1473                 if (!mvm->phy_ctxts[i].ref)
1474                         return &mvm->phy_ctxts[i];
1475
1476         IWL_ERR(mvm, "No available PHY context\n");
1477         return NULL;
1478 }
1479
1480 static int iwl_mvm_set_tx_power_old(struct iwl_mvm *mvm,
1481                                     struct ieee80211_vif *vif, s8 tx_power)
1482 {
1483         /* FW is in charge of regulatory enforcement */
1484         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1485                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1486                 .pwr_restriction = cpu_to_le16(tx_power),
1487         };
1488
1489         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1490                                     sizeof(reduce_txpwr_cmd),
1491                                     &reduce_txpwr_cmd);
1492 }
1493
1494 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1495                                 s16 tx_power)
1496 {
1497         struct iwl_dev_tx_power_cmd cmd = {
1498                 .set_mode = 0,
1499                 .mac_context_id =
1500                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1501                 .pwr_restriction = cpu_to_le16(8 * tx_power),
1502         };
1503
1504         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_TX_POWER_DEV))
1505                 return iwl_mvm_set_tx_power_old(mvm, vif, tx_power);
1506
1507         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1508                 cmd.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1509
1510         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1511                                     sizeof(cmd), &cmd);
1512 }
1513
1514 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1515                                      struct ieee80211_vif *vif)
1516 {
1517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1518         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1519         int ret;
1520
1521         mvmvif->mvm = mvm;
1522
1523         /*
1524          * make sure D0i3 exit is completed, otherwise a target access
1525          * during tx queue configuration could be done when still in
1526          * D0i3 state.
1527          */
1528         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1529         if (ret)
1530                 return ret;
1531
1532         /*
1533          * Not much to do here. The stack will not allow interface
1534          * types or combinations that we didn't advertise, so we
1535          * don't really have to check the types.
1536          */
1537
1538         mutex_lock(&mvm->mutex);
1539
1540         /* make sure that beacon statistics don't go backwards with FW reset */
1541         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1542                 mvmvif->beacon_stats.accu_num_beacons +=
1543                         mvmvif->beacon_stats.num_beacons;
1544
1545         /* Allocate resources for the MAC context, and add it to the fw  */
1546         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1547         if (ret)
1548                 goto out_unlock;
1549
1550         /* Counting number of interfaces is needed for legacy PM */
1551         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1552                 mvm->vif_count++;
1553
1554         /*
1555          * The AP binding flow can be done only after the beacon
1556          * template is configured (which happens only in the mac80211
1557          * start_ap() flow), and adding the broadcast station can happen
1558          * only after the binding.
1559          * In addition, since modifying the MAC before adding a bcast
1560          * station is not allowed by the FW, delay the adding of MAC context to
1561          * the point where we can also add the bcast station.
1562          * In short: there's not much we can do at this point, other than
1563          * allocating resources :)
1564          */
1565         if (vif->type == NL80211_IFTYPE_AP ||
1566             vif->type == NL80211_IFTYPE_ADHOC) {
1567                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1568                 if (ret) {
1569                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1570                         goto out_release;
1571                 }
1572
1573                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1574                 goto out_unlock;
1575         }
1576
1577         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1578         if (ret)
1579                 goto out_release;
1580
1581         ret = iwl_mvm_power_update_mac(mvm);
1582         if (ret)
1583                 goto out_remove_mac;
1584
1585         /* beacon filtering */
1586         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1587         if (ret)
1588                 goto out_remove_mac;
1589
1590         if (!mvm->bf_allowed_vif &&
1591             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1592                 mvm->bf_allowed_vif = mvmvif;
1593                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1594                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1595         }
1596
1597         /*
1598          * P2P_DEVICE interface does not have a channel context assigned to it,
1599          * so a dedicated PHY context is allocated to it and the corresponding
1600          * MAC context is bound to it at this stage.
1601          */
1602         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1603
1604                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1605                 if (!mvmvif->phy_ctxt) {
1606                         ret = -ENOSPC;
1607                         goto out_free_bf;
1608                 }
1609
1610                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1611                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1612                 if (ret)
1613                         goto out_unref_phy;
1614
1615                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1616                 if (ret)
1617                         goto out_unbind;
1618
1619                 /* Save a pointer to p2p device vif, so it can later be used to
1620                  * update the p2p device MAC when a GO is started/stopped */
1621                 mvm->p2p_device_vif = vif;
1622         }
1623
1624         iwl_mvm_vif_dbgfs_register(mvm, vif);
1625         goto out_unlock;
1626
1627  out_unbind:
1628         iwl_mvm_binding_remove_vif(mvm, vif);
1629  out_unref_phy:
1630         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1631  out_free_bf:
1632         if (mvm->bf_allowed_vif == mvmvif) {
1633                 mvm->bf_allowed_vif = NULL;
1634                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1635                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1636         }
1637  out_remove_mac:
1638         mvmvif->phy_ctxt = NULL;
1639         iwl_mvm_mac_ctxt_remove(mvm, vif);
1640  out_release:
1641         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1642                 mvm->vif_count--;
1643
1644         iwl_mvm_mac_ctxt_release(mvm, vif);
1645  out_unlock:
1646         mutex_unlock(&mvm->mutex);
1647
1648         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1649
1650         return ret;
1651 }
1652
1653 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1654                                         struct ieee80211_vif *vif)
1655 {
1656         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1657
1658         if (tfd_msk) {
1659                 /*
1660                  * mac80211 first removes all the stations of the vif and
1661                  * then removes the vif. When it removes a station it also
1662                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1663                  * of all the stations of this vif are closed, and the queues
1664                  * of these AMPDU sessions are properly closed.
1665                  * We still need to take care of the shared queues of the vif.
1666                  * Flush them here.
1667                  */
1668                 mutex_lock(&mvm->mutex);
1669                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1670                 mutex_unlock(&mvm->mutex);
1671
1672                 /*
1673                  * There are transports that buffer a few frames in the host.
1674                  * For these, the flush above isn't enough since while we were
1675                  * flushing, the transport might have sent more frames to the
1676                  * device. To solve this, wait here until the transport is
1677                  * empty. Technically, this could have replaced the flush
1678                  * above, but flush is much faster than draining. So flush
1679                  * first, and drain to make sure we have no frames in the
1680                  * transport anymore.
1681                  * If a station still had frames on the shared queues, it is
1682                  * already marked as draining, so to complete the draining, we
1683                  * just need to wait until the transport is empty.
1684                  */
1685                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1686         }
1687
1688         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1689                 /*
1690                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1691                  * We assume here that all the packets sent to the OFFCHANNEL
1692                  * queue are sent in ROC session.
1693                  */
1694                 flush_work(&mvm->roc_done_wk);
1695         } else {
1696                 /*
1697                  * By now, all the AC queues are empty. The AGG queues are
1698                  * empty too. We already got all the Tx responses for all the
1699                  * packets in the queues. The drain work can have been
1700                  * triggered. Flush it.
1701                  */
1702                 flush_work(&mvm->sta_drained_wk);
1703         }
1704 }
1705
1706 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1707                                          struct ieee80211_vif *vif)
1708 {
1709         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1710         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1711
1712         iwl_mvm_prepare_mac_removal(mvm, vif);
1713
1714         mutex_lock(&mvm->mutex);
1715
1716         if (mvm->bf_allowed_vif == mvmvif) {
1717                 mvm->bf_allowed_vif = NULL;
1718                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1719                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1720         }
1721
1722         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1723
1724         /*
1725          * For AP/GO interface, the tear down of the resources allocated to the
1726          * interface is be handled as part of the stop_ap flow.
1727          */
1728         if (vif->type == NL80211_IFTYPE_AP ||
1729             vif->type == NL80211_IFTYPE_ADHOC) {
1730 #ifdef CONFIG_NL80211_TESTMODE
1731                 if (vif == mvm->noa_vif) {
1732                         mvm->noa_vif = NULL;
1733                         mvm->noa_duration = 0;
1734                 }
1735 #endif
1736                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1737                 goto out_release;
1738         }
1739
1740         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1741                 mvm->p2p_device_vif = NULL;
1742                 iwl_mvm_rm_bcast_sta(mvm, vif);
1743                 iwl_mvm_binding_remove_vif(mvm, vif);
1744                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1745                 mvmvif->phy_ctxt = NULL;
1746         }
1747
1748         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1749                 mvm->vif_count--;
1750
1751         iwl_mvm_power_update_mac(mvm);
1752         iwl_mvm_mac_ctxt_remove(mvm, vif);
1753
1754 out_release:
1755         iwl_mvm_mac_ctxt_release(mvm, vif);
1756         mutex_unlock(&mvm->mutex);
1757 }
1758
1759 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1760 {
1761         return 0;
1762 }
1763
1764 struct iwl_mvm_mc_iter_data {
1765         struct iwl_mvm *mvm;
1766         int port_id;
1767 };
1768
1769 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1770                                       struct ieee80211_vif *vif)
1771 {
1772         struct iwl_mvm_mc_iter_data *data = _data;
1773         struct iwl_mvm *mvm = data->mvm;
1774         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1775         int ret, len;
1776
1777         /* if we don't have free ports, mcast frames will be dropped */
1778         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1779                 return;
1780
1781         if (vif->type != NL80211_IFTYPE_STATION ||
1782             !vif->bss_conf.assoc)
1783                 return;
1784
1785         cmd->port_id = data->port_id++;
1786         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1787         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1788
1789         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1790         if (ret)
1791                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1792 }
1793
1794 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1795 {
1796         struct iwl_mvm_mc_iter_data iter_data = {
1797                 .mvm = mvm,
1798         };
1799
1800         lockdep_assert_held(&mvm->mutex);
1801
1802         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1803                 return;
1804
1805         ieee80211_iterate_active_interfaces_atomic(
1806                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1807                 iwl_mvm_mc_iface_iterator, &iter_data);
1808 }
1809
1810 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1811                                      struct netdev_hw_addr_list *mc_list)
1812 {
1813         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1814         struct iwl_mcast_filter_cmd *cmd;
1815         struct netdev_hw_addr *addr;
1816         int addr_count;
1817         bool pass_all;
1818         int len;
1819
1820         addr_count = netdev_hw_addr_list_count(mc_list);
1821         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1822                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1823         if (pass_all)
1824                 addr_count = 0;
1825
1826         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1827         cmd = kzalloc(len, GFP_ATOMIC);
1828         if (!cmd)
1829                 return 0;
1830
1831         if (pass_all) {
1832                 cmd->pass_all = 1;
1833                 return (u64)(unsigned long)cmd;
1834         }
1835
1836         netdev_hw_addr_list_for_each(addr, mc_list) {
1837                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1838                                    cmd->count, addr->addr);
1839                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1840                        addr->addr, ETH_ALEN);
1841                 cmd->count++;
1842         }
1843
1844         return (u64)(unsigned long)cmd;
1845 }
1846
1847 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1848                                      unsigned int changed_flags,
1849                                      unsigned int *total_flags,
1850                                      u64 multicast)
1851 {
1852         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1853         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1854
1855         mutex_lock(&mvm->mutex);
1856
1857         /* replace previous configuration */
1858         kfree(mvm->mcast_filter_cmd);
1859         mvm->mcast_filter_cmd = cmd;
1860
1861         if (!cmd)
1862                 goto out;
1863
1864         iwl_mvm_recalc_multicast(mvm);
1865 out:
1866         mutex_unlock(&mvm->mutex);
1867         *total_flags = 0;
1868 }
1869
1870 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1871 struct iwl_bcast_iter_data {
1872         struct iwl_mvm *mvm;
1873         struct iwl_bcast_filter_cmd *cmd;
1874         u8 current_filter;
1875 };
1876
1877 static void
1878 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1879                          const struct iwl_fw_bcast_filter *in_filter,
1880                          struct iwl_fw_bcast_filter *out_filter)
1881 {
1882         struct iwl_fw_bcast_filter_attr *attr;
1883         int i;
1884
1885         memcpy(out_filter, in_filter, sizeof(*out_filter));
1886
1887         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1888                 attr = &out_filter->attrs[i];
1889
1890                 if (!attr->mask)
1891                         break;
1892
1893                 switch (attr->reserved1) {
1894                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1895                         if (vif->bss_conf.arp_addr_cnt != 1) {
1896                                 attr->mask = 0;
1897                                 continue;
1898                         }
1899
1900                         attr->val = vif->bss_conf.arp_addr_list[0];
1901                         break;
1902                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1903                         attr->val = *(__be32 *)&vif->addr[2];
1904                         break;
1905                 default:
1906                         break;
1907                 }
1908                 attr->reserved1 = 0;
1909                 out_filter->num_attrs++;
1910         }
1911 }
1912
1913 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1914                                           struct ieee80211_vif *vif)
1915 {
1916         struct iwl_bcast_iter_data *data = _data;
1917         struct iwl_mvm *mvm = data->mvm;
1918         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1919         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1920         struct iwl_fw_bcast_mac *bcast_mac;
1921         int i;
1922
1923         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1924                 return;
1925
1926         bcast_mac = &cmd->macs[mvmvif->id];
1927
1928         /*
1929          * enable filtering only for associated stations, but not for P2P
1930          * Clients
1931          */
1932         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1933             !vif->bss_conf.assoc)
1934                 return;
1935
1936         bcast_mac->default_discard = 1;
1937
1938         /* copy all configured filters */
1939         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1940                 /*
1941                  * Make sure we don't exceed our filters limit.
1942                  * if there is still a valid filter to be configured,
1943                  * be on the safe side and just allow bcast for this mac.
1944                  */
1945                 if (WARN_ON_ONCE(data->current_filter >=
1946                                  ARRAY_SIZE(cmd->filters))) {
1947                         bcast_mac->default_discard = 0;
1948                         bcast_mac->attached_filters = 0;
1949                         break;
1950                 }
1951
1952                 iwl_mvm_set_bcast_filter(vif,
1953                                          &mvm->bcast_filters[i],
1954                                          &cmd->filters[data->current_filter]);
1955
1956                 /* skip current filter if it contains no attributes */
1957                 if (!cmd->filters[data->current_filter].num_attrs)
1958                         continue;
1959
1960                 /* attach the filter to current mac */
1961                 bcast_mac->attached_filters |=
1962                                 cpu_to_le16(BIT(data->current_filter));
1963
1964                 data->current_filter++;
1965         }
1966 }
1967
1968 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1969                                     struct iwl_bcast_filter_cmd *cmd)
1970 {
1971         struct iwl_bcast_iter_data iter_data = {
1972                 .mvm = mvm,
1973                 .cmd = cmd,
1974         };
1975
1976         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1977                 return false;
1978
1979         memset(cmd, 0, sizeof(*cmd));
1980         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1981         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1982
1983 #ifdef CONFIG_IWLWIFI_DEBUGFS
1984         /* use debugfs filters/macs if override is configured */
1985         if (mvm->dbgfs_bcast_filtering.override) {
1986                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1987                        sizeof(cmd->filters));
1988                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1989                        sizeof(cmd->macs));
1990                 return true;
1991         }
1992 #endif
1993
1994         /* if no filters are configured, do nothing */
1995         if (!mvm->bcast_filters)
1996                 return false;
1997
1998         /* configure and attach these filters for each associated sta vif */
1999         ieee80211_iterate_active_interfaces(
2000                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2001                 iwl_mvm_bcast_filter_iterator, &iter_data);
2002
2003         return true;
2004 }
2005 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2006                                           struct ieee80211_vif *vif)
2007 {
2008         struct iwl_bcast_filter_cmd cmd;
2009
2010         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2011                 return 0;
2012
2013         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2014                 return 0;
2015
2016         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2017                                     sizeof(cmd), &cmd);
2018 }
2019 #else
2020 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2021                                                  struct ieee80211_vif *vif)
2022 {
2023         return 0;
2024 }
2025 #endif
2026
2027 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2028                                              struct ieee80211_vif *vif,
2029                                              struct ieee80211_bss_conf *bss_conf,
2030                                              u32 changes)
2031 {
2032         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2033         int ret;
2034
2035         /*
2036          * Re-calculate the tsf id, as the master-slave relations depend on the
2037          * beacon interval, which was not known when the station interface was
2038          * added.
2039          */
2040         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2041                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2042
2043         /*
2044          * If we're not associated yet, take the (new) BSSID before associating
2045          * so the firmware knows. If we're already associated, then use the old
2046          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2047          * branch for disassociation below.
2048          */
2049         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2050                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2051
2052         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2053         if (ret)
2054                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2055
2056         /* after sending it once, adopt mac80211 data */
2057         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2058         mvmvif->associated = bss_conf->assoc;
2059
2060         if (changes & BSS_CHANGED_ASSOC) {
2061                 if (bss_conf->assoc) {
2062                         /* clear statistics to get clean beacon counter */
2063                         iwl_mvm_request_statistics(mvm, true);
2064                         memset(&mvmvif->beacon_stats, 0,
2065                                sizeof(mvmvif->beacon_stats));
2066
2067                         /* add quota for this interface */
2068                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2069                         if (ret) {
2070                                 IWL_ERR(mvm, "failed to update quotas\n");
2071                                 return;
2072                         }
2073
2074                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2075                                      &mvm->status)) {
2076                                 /*
2077                                  * If we're restarting then the firmware will
2078                                  * obviously have lost synchronisation with
2079                                  * the AP. It will attempt to synchronise by
2080                                  * itself, but we can make it more reliable by
2081                                  * scheduling a session protection time event.
2082                                  *
2083                                  * The firmware needs to receive a beacon to
2084                                  * catch up with synchronisation, use 110% of
2085                                  * the beacon interval.
2086                                  *
2087                                  * Set a large maximum delay to allow for more
2088                                  * than a single interface.
2089                                  */
2090                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2091                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2092                                                         5 * dur, false);
2093                         }
2094
2095                         iwl_mvm_sf_update(mvm, vif, false);
2096                         iwl_mvm_power_vif_assoc(mvm, vif);
2097                         if (vif->p2p) {
2098                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2099                                 iwl_mvm_update_smps(mvm, vif,
2100                                                     IWL_MVM_SMPS_REQ_PROT,
2101                                                     IEEE80211_SMPS_DYNAMIC);
2102                         }
2103                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2104                         /*
2105                          * If update fails - SF might be running in associated
2106                          * mode while disassociated - which is forbidden.
2107                          */
2108                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2109                                   "Failed to update SF upon disassociation\n");
2110
2111                         /* remove AP station now that the MAC is unassoc */
2112                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2113                         if (ret)
2114                                 IWL_ERR(mvm, "failed to remove AP station\n");
2115
2116                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2117                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2118                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2119                         /* remove quota for this interface */
2120                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2121                         if (ret)
2122                                 IWL_ERR(mvm, "failed to update quotas\n");
2123
2124                         if (vif->p2p)
2125                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2126
2127                         /* this will take the cleared BSSID from bss_conf */
2128                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2129                         if (ret)
2130                                 IWL_ERR(mvm,
2131                                         "failed to update MAC %pM (clear after unassoc)\n",
2132                                         vif->addr);
2133                 }
2134
2135                 iwl_mvm_recalc_multicast(mvm);
2136                 iwl_mvm_configure_bcast_filter(mvm, vif);
2137
2138                 /* reset rssi values */
2139                 mvmvif->bf_data.ave_beacon_signal = 0;
2140
2141                 iwl_mvm_bt_coex_vif_change(mvm);
2142                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2143                                     IEEE80211_SMPS_AUTOMATIC);
2144         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2145                 /*
2146                  * We received a beacon _after_ association so
2147                  * remove the session protection.
2148                  */
2149                 iwl_mvm_remove_time_event(mvm, mvmvif,
2150                                           &mvmvif->time_event_data);
2151         }
2152
2153         if (changes & BSS_CHANGED_BEACON_INFO) {
2154                 iwl_mvm_sf_update(mvm, vif, false);
2155                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2156         }
2157
2158         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2159                 ret = iwl_mvm_power_update_mac(mvm);
2160                 if (ret)
2161                         IWL_ERR(mvm, "failed to update power mode\n");
2162         }
2163
2164         if (changes & BSS_CHANGED_TXPOWER) {
2165                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2166                                 bss_conf->txpower);
2167                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2168         }
2169
2170         if (changes & BSS_CHANGED_CQM) {
2171                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2172                 /* reset cqm events tracking */
2173                 mvmvif->bf_data.last_cqm_event = 0;
2174                 if (mvmvif->bf_data.bf_enabled) {
2175                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2176                         if (ret)
2177                                 IWL_ERR(mvm,
2178                                         "failed to update CQM thresholds\n");
2179                 }
2180         }
2181
2182         if (changes & BSS_CHANGED_ARP_FILTER) {
2183                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2184                 iwl_mvm_configure_bcast_filter(mvm, vif);
2185         }
2186 }
2187
2188 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2189                                  struct ieee80211_vif *vif)
2190 {
2191         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2192         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2193         int ret;
2194
2195         /*
2196          * iwl_mvm_mac_ctxt_add() might read directly from the device
2197          * (the system time), so make sure it is available.
2198          */
2199         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2200         if (ret)
2201                 return ret;
2202
2203         mutex_lock(&mvm->mutex);
2204
2205         /* Send the beacon template */
2206         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2207         if (ret)
2208                 goto out_unlock;
2209
2210         /*
2211          * Re-calculate the tsf id, as the master-slave relations depend on the
2212          * beacon interval, which was not known when the AP interface was added.
2213          */
2214         if (vif->type == NL80211_IFTYPE_AP)
2215                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2216
2217         /* Add the mac context */
2218         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2219         if (ret)
2220                 goto out_unlock;
2221
2222         /* Perform the binding */
2223         ret = iwl_mvm_binding_add_vif(mvm, vif);
2224         if (ret)
2225                 goto out_remove;
2226
2227         /* Send the bcast station. At this stage the TBTT and DTIM time events
2228          * are added and applied to the scheduler */
2229         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2230         if (ret)
2231                 goto out_unbind;
2232
2233         /* must be set before quota calculations */
2234         mvmvif->ap_ibss_active = true;
2235
2236         /* power updated needs to be done before quotas */
2237         iwl_mvm_power_update_mac(mvm);
2238
2239         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2240         if (ret)
2241                 goto out_quota_failed;
2242
2243         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2244         if (vif->p2p && mvm->p2p_device_vif)
2245                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2246
2247         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2248
2249         iwl_mvm_bt_coex_vif_change(mvm);
2250
2251         /* we don't support TDLS during DCM */
2252         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2253                 iwl_mvm_teardown_tdls_peers(mvm);
2254
2255         goto out_unlock;
2256
2257 out_quota_failed:
2258         iwl_mvm_power_update_mac(mvm);
2259         mvmvif->ap_ibss_active = false;
2260         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2261 out_unbind:
2262         iwl_mvm_binding_remove_vif(mvm, vif);
2263 out_remove:
2264         iwl_mvm_mac_ctxt_remove(mvm, vif);
2265 out_unlock:
2266         mutex_unlock(&mvm->mutex);
2267         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2268         return ret;
2269 }
2270
2271 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2272                                  struct ieee80211_vif *vif)
2273 {
2274         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2275         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2276
2277         iwl_mvm_prepare_mac_removal(mvm, vif);
2278
2279         mutex_lock(&mvm->mutex);
2280
2281         /* Handle AP stop while in CSA */
2282         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2283                 iwl_mvm_remove_time_event(mvm, mvmvif,
2284                                           &mvmvif->time_event_data);
2285                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2286         }
2287
2288         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2289                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2290                 mvm->csa_tx_block_bcn_timeout = 0;
2291         }
2292
2293         mvmvif->ap_ibss_active = false;
2294         mvm->ap_last_beacon_gp2 = 0;
2295
2296         iwl_mvm_bt_coex_vif_change(mvm);
2297
2298         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2299
2300         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2301         if (vif->p2p && mvm->p2p_device_vif)
2302                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2303
2304         iwl_mvm_update_quotas(mvm, false, NULL);
2305         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2306         iwl_mvm_binding_remove_vif(mvm, vif);
2307
2308         iwl_mvm_power_update_mac(mvm);
2309
2310         iwl_mvm_mac_ctxt_remove(mvm, vif);
2311
2312         mutex_unlock(&mvm->mutex);
2313 }
2314
2315 static void
2316 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2317                                  struct ieee80211_vif *vif,
2318                                  struct ieee80211_bss_conf *bss_conf,
2319                                  u32 changes)
2320 {
2321         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2322
2323         /* Changes will be applied when the AP/IBSS is started */
2324         if (!mvmvif->ap_ibss_active)
2325                 return;
2326
2327         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2328                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2329             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2330                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2331
2332         /* Need to send a new beacon template to the FW */
2333         if (changes & BSS_CHANGED_BEACON &&
2334             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2335                 IWL_WARN(mvm, "Failed updating beacon data\n");
2336
2337         if (changes & BSS_CHANGED_TXPOWER) {
2338                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2339                                 bss_conf->txpower);
2340                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2341         }
2342
2343 }
2344
2345 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2346                                      struct ieee80211_vif *vif,
2347                                      struct ieee80211_bss_conf *bss_conf,
2348                                      u32 changes)
2349 {
2350         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2351
2352         /*
2353          * iwl_mvm_bss_info_changed_station() might call
2354          * iwl_mvm_protect_session(), which reads directly from
2355          * the device (the system time), so make sure it is available.
2356          */
2357         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2358                 return;
2359
2360         mutex_lock(&mvm->mutex);
2361
2362         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2363                 iwl_mvm_scan_offload_stop(mvm, true);
2364
2365         switch (vif->type) {
2366         case NL80211_IFTYPE_STATION:
2367                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2368                 break;
2369         case NL80211_IFTYPE_AP:
2370         case NL80211_IFTYPE_ADHOC:
2371                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2372                 break;
2373         default:
2374                 /* shouldn't happen */
2375                 WARN_ON_ONCE(1);
2376         }
2377
2378         mutex_unlock(&mvm->mutex);
2379         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2380 }
2381
2382 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2383                                struct ieee80211_vif *vif,
2384                                struct ieee80211_scan_request *hw_req)
2385 {
2386         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2387         int ret;
2388
2389         if (hw_req->req.n_channels == 0 ||
2390             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2391                 return -EINVAL;
2392
2393         mutex_lock(&mvm->mutex);
2394         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2395         mutex_unlock(&mvm->mutex);
2396
2397         return ret;
2398 }
2399
2400 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2401                                        struct ieee80211_vif *vif)
2402 {
2403         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2404
2405         mutex_lock(&mvm->mutex);
2406
2407         /* Due to a race condition, it's possible that mac80211 asks
2408          * us to stop a hw_scan when it's already stopped.  This can
2409          * happen, for instance, if we stopped the scan ourselves,
2410          * called ieee80211_scan_completed() and the userspace called
2411          * cancel scan scan before ieee80211_scan_work() could run.
2412          * To handle that, simply return if the scan is not running.
2413         */
2414         /* FIXME: for now, we ignore this race for UMAC scans, since
2415          * they don't set the scan_status.
2416          */
2417         if ((mvm->scan_status & IWL_MVM_SCAN_REGULAR) ||
2418             (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2419                 iwl_mvm_cancel_scan(mvm);
2420
2421         mutex_unlock(&mvm->mutex);
2422 }
2423
2424 static void
2425 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2426                                   struct ieee80211_sta *sta, u16 tids,
2427                                   int num_frames,
2428                                   enum ieee80211_frame_release_type reason,
2429                                   bool more_data)
2430 {
2431         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2432
2433         /* Called when we need to transmit (a) frame(s) from mac80211 */
2434
2435         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2436                                           tids, more_data, false);
2437 }
2438
2439 static void
2440 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2441                                     struct ieee80211_sta *sta, u16 tids,
2442                                     int num_frames,
2443                                     enum ieee80211_frame_release_type reason,
2444                                     bool more_data)
2445 {
2446         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2447
2448         /* Called when we need to transmit (a) frame(s) from agg queue */
2449
2450         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2451                                           tids, more_data, true);
2452 }
2453
2454 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2455                                    struct ieee80211_vif *vif,
2456                                    enum sta_notify_cmd cmd,
2457                                    struct ieee80211_sta *sta)
2458 {
2459         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2460         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2461         unsigned long txqs = 0, tids = 0;
2462         int tid;
2463
2464         spin_lock_bh(&mvmsta->lock);
2465         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2466                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2467
2468                 if (tid_data->state != IWL_AGG_ON &&
2469                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2470                         continue;
2471
2472                 __set_bit(tid_data->txq_id, &txqs);
2473
2474                 if (iwl_mvm_tid_queued(tid_data) == 0)
2475                         continue;
2476
2477                 __set_bit(tid, &tids);
2478         }
2479
2480         switch (cmd) {
2481         case STA_NOTIFY_SLEEP:
2482                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2483                         ieee80211_sta_block_awake(hw, sta, true);
2484
2485                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2486                         ieee80211_sta_set_buffered(sta, tid, true);
2487
2488                 if (txqs)
2489                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2490                 /*
2491                  * The fw updates the STA to be asleep. Tx packets on the Tx
2492                  * queues to this station will not be transmitted. The fw will
2493                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2494                  */
2495                 break;
2496         case STA_NOTIFY_AWAKE:
2497                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2498                         break;
2499
2500                 if (txqs)
2501                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2502                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2503                 break;
2504         default:
2505                 break;
2506         }
2507         spin_unlock_bh(&mvmsta->lock);
2508 }
2509
2510 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2511                                        struct ieee80211_vif *vif,
2512                                        struct ieee80211_sta *sta)
2513 {
2514         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2515         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2516
2517         /*
2518          * This is called before mac80211 does RCU synchronisation,
2519          * so here we already invalidate our internal RCU-protected
2520          * station pointer. The rest of the code will thus no longer
2521          * be able to find the station this way, and we don't rely
2522          * on further RCU synchronisation after the sta_state()
2523          * callback deleted the station.
2524          */
2525         mutex_lock(&mvm->mutex);
2526         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2527                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2528                                    ERR_PTR(-ENOENT));
2529         mutex_unlock(&mvm->mutex);
2530 }
2531
2532 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2533                                 const u8 *bssid)
2534 {
2535         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2536                 return;
2537
2538         if (iwlwifi_mod_params.uapsd_disable) {
2539                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2540                 return;
2541         }
2542
2543         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2544 }
2545
2546 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2547                                  struct ieee80211_vif *vif,
2548                                  struct ieee80211_sta *sta,
2549                                  enum ieee80211_sta_state old_state,
2550                                  enum ieee80211_sta_state new_state)
2551 {
2552         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2553         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2554         int ret;
2555
2556         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2557                            sta->addr, old_state, new_state);
2558
2559         /* this would be a mac80211 bug ... but don't crash */
2560         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2561                 return -EINVAL;
2562
2563         /* if a STA is being removed, reuse its ID */
2564         flush_work(&mvm->sta_drained_wk);
2565
2566         mutex_lock(&mvm->mutex);
2567         if (old_state == IEEE80211_STA_NOTEXIST &&
2568             new_state == IEEE80211_STA_NONE) {
2569                 /*
2570                  * Firmware bug - it'll crash if the beacon interval is less
2571                  * than 16. We can't avoid connecting at all, so refuse the
2572                  * station state change, this will cause mac80211 to abandon
2573                  * attempts to connect to this AP, and eventually wpa_s will
2574                  * blacklist the AP...
2575                  */
2576                 if (vif->type == NL80211_IFTYPE_STATION &&
2577                     vif->bss_conf.beacon_int < 16) {
2578                         IWL_ERR(mvm,
2579                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2580                                 sta->addr, vif->bss_conf.beacon_int);
2581                         ret = -EINVAL;
2582                         goto out_unlock;
2583                 }
2584
2585                 if (sta->tdls &&
2586                     (vif->p2p ||
2587                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2588                                                 IWL_MVM_TDLS_STA_COUNT ||
2589                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2590                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2591                         ret = -EBUSY;
2592                         goto out_unlock;
2593                 }
2594
2595                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2596                 if (sta->tdls && ret == 0)
2597                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2598         } else if (old_state == IEEE80211_STA_NONE &&
2599                    new_state == IEEE80211_STA_AUTH) {
2600                 /*
2601                  * EBS may be disabled due to previous failures reported by FW.
2602                  * Reset EBS status here assuming environment has been changed.
2603                  */
2604                 mvm->last_ebs_successful = true;
2605                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2606                 ret = 0;
2607         } else if (old_state == IEEE80211_STA_AUTH &&
2608                    new_state == IEEE80211_STA_ASSOC) {
2609                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2610                 if (ret == 0)
2611                         iwl_mvm_rs_rate_init(mvm, sta,
2612                                              mvmvif->phy_ctxt->channel->band,
2613                                              true);
2614         } else if (old_state == IEEE80211_STA_ASSOC &&
2615                    new_state == IEEE80211_STA_AUTHORIZED) {
2616
2617                 /* we don't support TDLS during DCM */
2618                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2619                         iwl_mvm_teardown_tdls_peers(mvm);
2620
2621                 /* enable beacon filtering */
2622                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2623                 ret = 0;
2624         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2625                    new_state == IEEE80211_STA_ASSOC) {
2626                 /* disable beacon filtering */
2627                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2628                 ret = 0;
2629         } else if (old_state == IEEE80211_STA_ASSOC &&
2630                    new_state == IEEE80211_STA_AUTH) {
2631                 ret = 0;
2632         } else if (old_state == IEEE80211_STA_AUTH &&
2633                    new_state == IEEE80211_STA_NONE) {
2634                 ret = 0;
2635         } else if (old_state == IEEE80211_STA_NONE &&
2636                    new_state == IEEE80211_STA_NOTEXIST) {
2637                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2638                 if (sta->tdls)
2639                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2640         } else {
2641                 ret = -EIO;
2642         }
2643  out_unlock:
2644         mutex_unlock(&mvm->mutex);
2645
2646         if (sta->tdls && ret == 0) {
2647                 if (old_state == IEEE80211_STA_NOTEXIST &&
2648                     new_state == IEEE80211_STA_NONE)
2649                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2650                 else if (old_state == IEEE80211_STA_NONE &&
2651                          new_state == IEEE80211_STA_NOTEXIST)
2652                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2653         }
2654
2655         return ret;
2656 }
2657
2658 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2659 {
2660         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2661
2662         mvm->rts_threshold = value;
2663
2664         return 0;
2665 }
2666
2667 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2668                                   struct ieee80211_vif *vif,
2669                                   struct ieee80211_sta *sta, u32 changed)
2670 {
2671         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2672
2673         if (vif->type == NL80211_IFTYPE_STATION &&
2674             changed & IEEE80211_RC_NSS_CHANGED)
2675                 iwl_mvm_sf_update(mvm, vif, false);
2676 }
2677
2678 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2679                                struct ieee80211_vif *vif, u16 ac,
2680                                const struct ieee80211_tx_queue_params *params)
2681 {
2682         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2683         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2684
2685         mvmvif->queue_params[ac] = *params;
2686
2687         /*
2688          * No need to update right away, we'll get BSS_CHANGED_QOS
2689          * The exception is P2P_DEVICE interface which needs immediate update.
2690          */
2691         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2692                 int ret;
2693
2694                 mutex_lock(&mvm->mutex);
2695                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2696                 mutex_unlock(&mvm->mutex);
2697                 return ret;
2698         }
2699         return 0;
2700 }
2701
2702 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2703                                       struct ieee80211_vif *vif)
2704 {
2705         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2706         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2707                            200 + vif->bss_conf.beacon_int);
2708         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2709                                100 + vif->bss_conf.beacon_int);
2710
2711         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2712                 return;
2713
2714         /*
2715          * iwl_mvm_protect_session() reads directly from the device
2716          * (the system time), so make sure it is available.
2717          */
2718         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2719                 return;
2720
2721         mutex_lock(&mvm->mutex);
2722         /* Try really hard to protect the session and hear a beacon */
2723         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2724         mutex_unlock(&mvm->mutex);
2725
2726         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2727 }
2728
2729 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2730                                         struct ieee80211_vif *vif,
2731                                         struct cfg80211_sched_scan_request *req,
2732                                         struct ieee80211_scan_ies *ies)
2733 {
2734         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2735
2736         int ret;
2737
2738         mutex_lock(&mvm->mutex);
2739
2740         if (!vif->bss_conf.idle) {
2741                 ret = -EBUSY;
2742                 goto out;
2743         }
2744
2745         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2746
2747 out:
2748         mutex_unlock(&mvm->mutex);
2749         return ret;
2750 }
2751
2752 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2753                                        struct ieee80211_vif *vif)
2754 {
2755         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2756         int ret;
2757
2758         mutex_lock(&mvm->mutex);
2759
2760         /* Due to a race condition, it's possible that mac80211 asks
2761          * us to stop a sched_scan when it's already stopped.  This
2762          * can happen, for instance, if we stopped the scan ourselves,
2763          * called ieee80211_sched_scan_stopped() and the userspace called
2764          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2765          * could run.  To handle this, simply return if the scan is
2766          * not running.
2767         */
2768         /* FIXME: for now, we ignore this race for UMAC scans, since
2769          * they don't set the scan_status.
2770          */
2771         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
2772             !(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2773                 mutex_unlock(&mvm->mutex);
2774                 return 0;
2775         }
2776
2777         ret = iwl_mvm_scan_offload_stop(mvm, false);
2778         mutex_unlock(&mvm->mutex);
2779         iwl_mvm_wait_for_async_handlers(mvm);
2780
2781         return ret;
2782 }
2783
2784 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2785                                enum set_key_cmd cmd,
2786                                struct ieee80211_vif *vif,
2787                                struct ieee80211_sta *sta,
2788                                struct ieee80211_key_conf *key)
2789 {
2790         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2791         int ret;
2792
2793         if (iwlwifi_mod_params.sw_crypto) {
2794                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2795                 return -EOPNOTSUPP;
2796         }
2797
2798         switch (key->cipher) {
2799         case WLAN_CIPHER_SUITE_TKIP:
2800                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2801                 /* fall-through */
2802         case WLAN_CIPHER_SUITE_CCMP:
2803                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2804                 break;
2805         case WLAN_CIPHER_SUITE_AES_CMAC:
2806                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2807                 break;
2808         case WLAN_CIPHER_SUITE_WEP40:
2809         case WLAN_CIPHER_SUITE_WEP104:
2810                 /* For non-client mode, only use WEP keys for TX as we probably
2811                  * don't have a station yet anyway and would then have to keep
2812                  * track of the keys, linking them to each of the clients/peers
2813                  * as they appear. For now, don't do that, for performance WEP
2814                  * offload doesn't really matter much, but we need it for some
2815                  * other offload features in client mode.
2816                  */
2817                 if (vif->type != NL80211_IFTYPE_STATION)
2818                         return 0;
2819                 break;
2820         default:
2821                 /* currently FW supports only one optional cipher scheme */
2822                 if (hw->n_cipher_schemes &&
2823                     hw->cipher_schemes->cipher == key->cipher)
2824                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2825                 else
2826                         return -EOPNOTSUPP;
2827         }
2828
2829         mutex_lock(&mvm->mutex);
2830
2831         switch (cmd) {
2832         case SET_KEY:
2833                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2834                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2835                         /*
2836                          * GTK on AP interface is a TX-only key, return 0;
2837                          * on IBSS they're per-station and because we're lazy
2838                          * we don't support them for RX, so do the same.
2839                          */
2840                         ret = 0;
2841                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2842                         break;
2843                 }
2844
2845                 /* During FW restart, in order to restore the state as it was,
2846                  * don't try to reprogram keys we previously failed for.
2847                  */
2848                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2849                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2850                         IWL_DEBUG_MAC80211(mvm,
2851                                            "skip invalid idx key programming during restart\n");
2852                         ret = 0;
2853                         break;
2854                 }
2855
2856                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2857                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key,
2858                                           test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2859                                                    &mvm->status));
2860                 if (ret) {
2861                         IWL_WARN(mvm, "set key failed\n");
2862                         /*
2863                          * can't add key for RX, but we don't need it
2864                          * in the device for TX so still return 0
2865                          */
2866                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2867                         ret = 0;
2868                 }
2869
2870                 break;
2871         case DISABLE_KEY:
2872                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2873                         ret = 0;
2874                         break;
2875                 }
2876
2877                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2878                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2879                 break;
2880         default:
2881                 ret = -EINVAL;
2882         }
2883
2884         mutex_unlock(&mvm->mutex);
2885         return ret;
2886 }
2887
2888 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2889                                         struct ieee80211_vif *vif,
2890                                         struct ieee80211_key_conf *keyconf,
2891                                         struct ieee80211_sta *sta,
2892                                         u32 iv32, u16 *phase1key)
2893 {
2894         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2895
2896         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2897                 return;
2898
2899         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2900 }
2901
2902
2903 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2904                                struct iwl_rx_packet *pkt, void *data)
2905 {
2906         struct iwl_mvm *mvm =
2907                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2908         struct iwl_hs20_roc_res *resp;
2909         int resp_len = iwl_rx_packet_payload_len(pkt);
2910         struct iwl_mvm_time_event_data *te_data = data;
2911
2912         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2913                 return true;
2914
2915         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2916                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2917                 return true;
2918         }
2919
2920         resp = (void *)pkt->data;
2921
2922         IWL_DEBUG_TE(mvm,
2923                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2924                      resp->status, resp->event_unique_id);
2925
2926         te_data->uid = le32_to_cpu(resp->event_unique_id);
2927         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2928                      te_data->uid);
2929
2930         spin_lock_bh(&mvm->time_event_lock);
2931         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2932         spin_unlock_bh(&mvm->time_event_lock);
2933
2934         return true;
2935 }
2936
2937 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
2938 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2939                                     struct ieee80211_channel *channel,
2940                                     struct ieee80211_vif *vif,
2941                                     int duration)
2942 {
2943         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2944         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2945         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2946         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2947         struct iwl_notification_wait wait_time_event;
2948         struct iwl_hs20_roc_req aux_roc_req = {
2949                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2950                 .id_and_color =
2951                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2952                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2953                 /* Set the channel info data */
2954                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2955                         PHY_BAND_24 : PHY_BAND_5,
2956                 .channel_info.channel = channel->hw_value,
2957                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2958                 /* Set the time and duration */
2959                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2960                 .apply_time_max_delay =
2961                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2962                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2963          };
2964
2965         /* Set the node address */
2966         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2967
2968         lockdep_assert_held(&mvm->mutex);
2969
2970         spin_lock_bh(&mvm->time_event_lock);
2971
2972         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2973                 spin_unlock_bh(&mvm->time_event_lock);
2974                 return -EIO;
2975         }
2976
2977         te_data->vif = vif;
2978         te_data->duration = duration;
2979         te_data->id = HOT_SPOT_CMD;
2980
2981         spin_unlock_bh(&mvm->time_event_lock);
2982
2983         /*
2984          * Use a notification wait, which really just processes the
2985          * command response and doesn't wait for anything, in order
2986          * to be able to process the response and get the UID inside
2987          * the RX path. Using CMD_WANT_SKB doesn't work because it
2988          * stores the buffer and then wakes up this thread, by which
2989          * time another notification (that the time event started)
2990          * might already be processed unsuccessfully.
2991          */
2992         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2993                                    time_event_response,
2994                                    ARRAY_SIZE(time_event_response),
2995                                    iwl_mvm_rx_aux_roc, te_data);
2996
2997         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2998                                    &aux_roc_req);
2999
3000         if (res) {
3001                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3002                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3003                 goto out_clear_te;
3004         }
3005
3006         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3007         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3008         /* should never fail */
3009         WARN_ON_ONCE(res);
3010
3011         if (res) {
3012  out_clear_te:
3013                 spin_lock_bh(&mvm->time_event_lock);
3014                 iwl_mvm_te_clear_data(mvm, te_data);
3015                 spin_unlock_bh(&mvm->time_event_lock);
3016         }
3017
3018         return res;
3019 }
3020
3021 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3022                        struct ieee80211_vif *vif,
3023                        struct ieee80211_channel *channel,
3024                        int duration,
3025                        enum ieee80211_roc_type type)
3026 {
3027         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3028         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3029         struct cfg80211_chan_def chandef;
3030         struct iwl_mvm_phy_ctxt *phy_ctxt;
3031         int ret, i;
3032
3033         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3034                            duration, type);
3035
3036         flush_work(&mvm->roc_done_wk);
3037
3038         mutex_lock(&mvm->mutex);
3039
3040         switch (vif->type) {
3041         case NL80211_IFTYPE_STATION:
3042                 if (mvm->fw->ucode_capa.capa[0] &
3043                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
3044                         /* Use aux roc framework (HS20) */
3045                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3046                                                        vif, duration);
3047                         goto out_unlock;
3048                 }
3049                 IWL_ERR(mvm, "hotspot not supported\n");
3050                 ret = -EINVAL;
3051                 goto out_unlock;
3052         case NL80211_IFTYPE_P2P_DEVICE:
3053                 /* handle below */
3054                 break;
3055         default:
3056                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3057                 ret = -EINVAL;
3058                 goto out_unlock;
3059         }
3060
3061         for (i = 0; i < NUM_PHY_CTX; i++) {
3062                 phy_ctxt = &mvm->phy_ctxts[i];
3063                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3064                         continue;
3065
3066                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3067                         /*
3068                          * Unbind the P2P_DEVICE from the current PHY context,
3069                          * and if the PHY context is not used remove it.
3070                          */
3071                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3072                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3073                                 goto out_unlock;
3074
3075                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3076
3077                         /* Bind the P2P_DEVICE to the current PHY Context */
3078                         mvmvif->phy_ctxt = phy_ctxt;
3079
3080                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3081                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3082                                 goto out_unlock;
3083
3084                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3085                         goto schedule_time_event;
3086                 }
3087         }
3088
3089         /* Need to update the PHY context only if the ROC channel changed */
3090         if (channel == mvmvif->phy_ctxt->channel)
3091                 goto schedule_time_event;
3092
3093         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3094
3095         /*
3096          * Change the PHY context configuration as it is currently referenced
3097          * only by the P2P Device MAC
3098          */
3099         if (mvmvif->phy_ctxt->ref == 1) {
3100                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3101                                                &chandef, 1, 1);
3102                 if (ret)
3103                         goto out_unlock;
3104         } else {
3105                 /*
3106                  * The PHY context is shared with other MACs. Need to remove the
3107                  * P2P Device from the binding, allocate an new PHY context and
3108                  * create a new binding
3109                  */
3110                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3111                 if (!phy_ctxt) {
3112                         ret = -ENOSPC;
3113                         goto out_unlock;
3114                 }
3115
3116                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3117                                                1, 1);
3118                 if (ret) {
3119                         IWL_ERR(mvm, "Failed to change PHY context\n");
3120                         goto out_unlock;
3121                 }
3122
3123                 /* Unbind the P2P_DEVICE from the current PHY context */
3124                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3125                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3126                         goto out_unlock;
3127
3128                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3129
3130                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3131                 mvmvif->phy_ctxt = phy_ctxt;
3132
3133                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3134                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3135                         goto out_unlock;
3136
3137                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3138         }
3139
3140 schedule_time_event:
3141         /* Schedule the time events */
3142         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3143
3144 out_unlock:
3145         mutex_unlock(&mvm->mutex);
3146         IWL_DEBUG_MAC80211(mvm, "leave\n");
3147         return ret;
3148 }
3149
3150 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3151 {
3152         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3153
3154         IWL_DEBUG_MAC80211(mvm, "enter\n");
3155
3156         mutex_lock(&mvm->mutex);
3157         iwl_mvm_stop_roc(mvm);
3158         mutex_unlock(&mvm->mutex);
3159
3160         IWL_DEBUG_MAC80211(mvm, "leave\n");
3161         return 0;
3162 }
3163
3164 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3165                                  struct ieee80211_chanctx_conf *ctx)
3166 {
3167         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3168         struct iwl_mvm_phy_ctxt *phy_ctxt;
3169         int ret;
3170
3171         lockdep_assert_held(&mvm->mutex);
3172
3173         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3174
3175         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3176         if (!phy_ctxt) {
3177                 ret = -ENOSPC;
3178                 goto out;
3179         }
3180
3181         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3182                                        ctx->rx_chains_static,
3183                                        ctx->rx_chains_dynamic);
3184         if (ret) {
3185                 IWL_ERR(mvm, "Failed to add PHY context\n");
3186                 goto out;
3187         }
3188
3189         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3190         *phy_ctxt_id = phy_ctxt->id;
3191 out:
3192         return ret;
3193 }
3194
3195 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3196                                struct ieee80211_chanctx_conf *ctx)
3197 {
3198         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3199         int ret;
3200
3201         mutex_lock(&mvm->mutex);
3202         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3203         mutex_unlock(&mvm->mutex);
3204
3205         return ret;
3206 }
3207
3208 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3209                                      struct ieee80211_chanctx_conf *ctx)
3210 {
3211         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3212         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3213
3214         lockdep_assert_held(&mvm->mutex);
3215
3216         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3217 }
3218
3219 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3220                                    struct ieee80211_chanctx_conf *ctx)
3221 {
3222         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3223
3224         mutex_lock(&mvm->mutex);
3225         __iwl_mvm_remove_chanctx(mvm, ctx);
3226         mutex_unlock(&mvm->mutex);
3227 }
3228
3229 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3230                                    struct ieee80211_chanctx_conf *ctx,
3231                                    u32 changed)
3232 {
3233         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3234         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3235         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3236
3237         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3238                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3239                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3240                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3241                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3242                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3243                       phy_ctxt->ref, changed))
3244                 return;
3245
3246         mutex_lock(&mvm->mutex);
3247         iwl_mvm_bt_coex_vif_change(mvm);
3248         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3249                                  ctx->rx_chains_static,
3250                                  ctx->rx_chains_dynamic);
3251         mutex_unlock(&mvm->mutex);
3252 }
3253
3254 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3255                                         struct ieee80211_vif *vif,
3256                                         struct ieee80211_chanctx_conf *ctx,
3257                                         bool switching_chanctx)
3258 {
3259         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3260         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3261         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3262         int ret;
3263
3264         lockdep_assert_held(&mvm->mutex);
3265
3266         mvmvif->phy_ctxt = phy_ctxt;
3267
3268         switch (vif->type) {
3269         case NL80211_IFTYPE_AP:
3270                 /* only needed if we're switching chanctx (i.e. during CSA) */
3271                 if (switching_chanctx) {
3272                         mvmvif->ap_ibss_active = true;
3273                         break;
3274                 }
3275         case NL80211_IFTYPE_ADHOC:
3276                 /*
3277                  * The AP binding flow is handled as part of the start_ap flow
3278                  * (in bss_info_changed), similarly for IBSS.
3279                  */
3280                 ret = 0;
3281                 goto out;
3282         case NL80211_IFTYPE_STATION:
3283                 break;
3284         case NL80211_IFTYPE_MONITOR:
3285                 /* always disable PS when a monitor interface is active */
3286                 mvmvif->ps_disabled = true;
3287                 break;
3288         default:
3289                 ret = -EINVAL;
3290                 goto out;
3291         }
3292
3293         ret = iwl_mvm_binding_add_vif(mvm, vif);
3294         if (ret)
3295                 goto out;
3296
3297         /*
3298          * Power state must be updated before quotas,
3299          * otherwise fw will complain.
3300          */
3301         iwl_mvm_power_update_mac(mvm);
3302
3303         /* Setting the quota at this stage is only required for monitor
3304          * interfaces. For the other types, the bss_info changed flow
3305          * will handle quota settings.
3306          */
3307         if (vif->type == NL80211_IFTYPE_MONITOR) {
3308                 mvmvif->monitor_active = true;
3309                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3310                 if (ret)
3311                         goto out_remove_binding;
3312         }
3313
3314         /* Handle binding during CSA */
3315         if (vif->type == NL80211_IFTYPE_AP) {
3316                 iwl_mvm_update_quotas(mvm, false, NULL);
3317                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3318         }
3319
3320         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3321                 u32 duration = 2 * vif->bss_conf.beacon_int;
3322
3323                 /* iwl_mvm_protect_session() reads directly from the
3324                  * device (the system time), so make sure it is
3325                  * available.
3326                  */
3327                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3328                 if (ret)
3329                         goto out_remove_binding;
3330
3331                 /* Protect the session to make sure we hear the first
3332                  * beacon on the new channel.
3333                  */
3334                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3335                                         vif->bss_conf.beacon_int / 2,
3336                                         true);
3337
3338                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3339
3340                 iwl_mvm_update_quotas(mvm, false, NULL);
3341         }
3342
3343         goto out;
3344
3345 out_remove_binding:
3346         iwl_mvm_binding_remove_vif(mvm, vif);
3347         iwl_mvm_power_update_mac(mvm);
3348 out:
3349         if (ret)
3350                 mvmvif->phy_ctxt = NULL;
3351         return ret;
3352 }
3353 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3354                                       struct ieee80211_vif *vif,
3355                                       struct ieee80211_chanctx_conf *ctx)
3356 {
3357         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3358         int ret;
3359
3360         mutex_lock(&mvm->mutex);
3361         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3362         mutex_unlock(&mvm->mutex);
3363
3364         return ret;
3365 }
3366
3367 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3368                                            struct ieee80211_vif *vif,
3369                                            struct ieee80211_chanctx_conf *ctx,
3370                                            bool switching_chanctx)
3371 {
3372         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3373         struct ieee80211_vif *disabled_vif = NULL;
3374
3375         lockdep_assert_held(&mvm->mutex);
3376
3377         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3378
3379         switch (vif->type) {
3380         case NL80211_IFTYPE_ADHOC:
3381                 goto out;
3382         case NL80211_IFTYPE_MONITOR:
3383                 mvmvif->monitor_active = false;
3384                 mvmvif->ps_disabled = false;
3385                 break;
3386         case NL80211_IFTYPE_AP:
3387                 /* This part is triggered only during CSA */
3388                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3389                         goto out;
3390
3391                 mvmvif->csa_countdown = false;
3392
3393                 /* Set CS bit on all the stations */
3394                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3395
3396                 /* Save blocked iface, the timeout is set on the next beacon */
3397                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3398
3399                 mvmvif->ap_ibss_active = false;
3400                 break;
3401         case NL80211_IFTYPE_STATION:
3402                 if (!switching_chanctx)
3403                         break;
3404
3405                 disabled_vif = vif;
3406
3407                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3408                 break;
3409         default:
3410                 break;
3411         }
3412
3413         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3414         iwl_mvm_binding_remove_vif(mvm, vif);
3415
3416 out:
3417         mvmvif->phy_ctxt = NULL;
3418         iwl_mvm_power_update_mac(mvm);
3419 }
3420
3421 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3422                                          struct ieee80211_vif *vif,
3423                                          struct ieee80211_chanctx_conf *ctx)
3424 {
3425         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3426
3427         mutex_lock(&mvm->mutex);
3428         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3429         mutex_unlock(&mvm->mutex);
3430 }
3431
3432 static int
3433 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3434                                 struct ieee80211_vif_chanctx_switch *vifs)
3435 {
3436         int ret;
3437
3438         mutex_lock(&mvm->mutex);
3439         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3440         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3441
3442         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3443         if (ret) {
3444                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3445                 goto out_reassign;
3446         }
3447
3448         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3449                                            true);
3450         if (ret) {
3451                 IWL_ERR(mvm,
3452                         "failed to assign new_ctx during channel switch\n");
3453                 goto out_remove;
3454         }
3455
3456         /* we don't support TDLS during DCM - can be caused by channel switch */
3457         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3458                 iwl_mvm_teardown_tdls_peers(mvm);
3459
3460         goto out;
3461
3462 out_remove:
3463         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3464
3465 out_reassign:
3466         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3467                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3468                 goto out_restart;
3469         }
3470
3471         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3472                                          true)) {
3473                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3474                 goto out_restart;
3475         }
3476
3477         goto out;
3478
3479 out_restart:
3480         /* things keep failing, better restart the hw */
3481         iwl_mvm_nic_restart(mvm, false);
3482
3483 out:
3484         mutex_unlock(&mvm->mutex);
3485
3486         return ret;
3487 }
3488
3489 static int
3490 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3491                                     struct ieee80211_vif_chanctx_switch *vifs)
3492 {
3493         int ret;
3494
3495         mutex_lock(&mvm->mutex);
3496         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3497
3498         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3499                                            true);
3500         if (ret) {
3501                 IWL_ERR(mvm,
3502                         "failed to assign new_ctx during channel switch\n");
3503                 goto out_reassign;
3504         }
3505
3506         goto out;
3507
3508 out_reassign:
3509         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3510                                          true)) {
3511                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3512                 goto out_restart;
3513         }
3514
3515         goto out;
3516
3517 out_restart:
3518         /* things keep failing, better restart the hw */
3519         iwl_mvm_nic_restart(mvm, false);
3520
3521 out:
3522         mutex_unlock(&mvm->mutex);
3523
3524         return ret;
3525 }
3526
3527 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3528                                       struct ieee80211_vif_chanctx_switch *vifs,
3529                                       int n_vifs,
3530                                       enum ieee80211_chanctx_switch_mode mode)
3531 {
3532         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3533         int ret;
3534
3535         /* we only support a single-vif right now */
3536         if (n_vifs > 1)
3537                 return -EOPNOTSUPP;
3538
3539         switch (mode) {
3540         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3541                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3542                 break;
3543         case CHANCTX_SWMODE_REASSIGN_VIF:
3544                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3545                 break;
3546         default:
3547                 ret = -EOPNOTSUPP;
3548                 break;
3549         }
3550
3551         return ret;
3552 }
3553
3554 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3555                            struct ieee80211_sta *sta,
3556                            bool set)
3557 {
3558         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3559         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3560
3561         if (!mvm_sta || !mvm_sta->vif) {
3562                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3563                 return -EINVAL;
3564         }
3565
3566         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3567 }
3568
3569 #ifdef CONFIG_NL80211_TESTMODE
3570 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3571         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3572         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3573         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3574 };
3575
3576 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3577                                       struct ieee80211_vif *vif,
3578                                       void *data, int len)
3579 {
3580         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3581         int err;
3582         u32 noa_duration;
3583
3584         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3585         if (err)
3586                 return err;
3587
3588         if (!tb[IWL_MVM_TM_ATTR_CMD])
3589                 return -EINVAL;
3590
3591         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3592         case IWL_MVM_TM_CMD_SET_NOA:
3593                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3594                     !vif->bss_conf.enable_beacon ||
3595                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3596                         return -EINVAL;
3597
3598                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3599                 if (noa_duration >= vif->bss_conf.beacon_int)
3600                         return -EINVAL;
3601
3602                 mvm->noa_duration = noa_duration;
3603                 mvm->noa_vif = vif;
3604
3605                 return iwl_mvm_update_quotas(mvm, false, NULL);
3606         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3607                 /* must be associated client vif - ignore authorized */
3608                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3609                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3610                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3611                         return -EINVAL;
3612
3613                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3614                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3615                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3616         }
3617
3618         return -EOPNOTSUPP;
3619 }
3620
3621 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3622                                     struct ieee80211_vif *vif,
3623                                     void *data, int len)
3624 {
3625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3626         int err;
3627
3628         mutex_lock(&mvm->mutex);
3629         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3630         mutex_unlock(&mvm->mutex);
3631
3632         return err;
3633 }
3634 #endif
3635
3636 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3637                                    struct ieee80211_vif *vif,
3638                                    struct ieee80211_channel_switch *chsw)
3639 {
3640         /* By implementing this operation, we prevent mac80211 from
3641          * starting its own channel switch timer, so that we can call
3642          * ieee80211_chswitch_done() ourselves at the right time
3643          * (which is when the absence time event starts).
3644          */
3645
3646         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3647                            "dummy channel switch op\n");
3648 }
3649
3650 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3651                                       struct ieee80211_vif *vif,
3652                                       struct ieee80211_channel_switch *chsw)
3653 {
3654         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3655         struct ieee80211_vif *csa_vif;
3656         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3657         u32 apply_time;
3658         int ret;
3659
3660         mutex_lock(&mvm->mutex);
3661
3662         mvmvif->csa_failed = false;
3663
3664         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3665                            chsw->chandef.center_freq1);
3666
3667         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3668
3669         switch (vif->type) {
3670         case NL80211_IFTYPE_AP:
3671                 csa_vif =
3672                         rcu_dereference_protected(mvm->csa_vif,
3673                                                   lockdep_is_held(&mvm->mutex));
3674                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3675                               "Another CSA is already in progress")) {
3676                         ret = -EBUSY;
3677                         goto out_unlock;
3678                 }
3679
3680                 rcu_assign_pointer(mvm->csa_vif, vif);
3681
3682                 if (WARN_ONCE(mvmvif->csa_countdown,
3683                               "Previous CSA countdown didn't complete")) {
3684                         ret = -EBUSY;
3685                         goto out_unlock;
3686                 }
3687
3688                 break;
3689         case NL80211_IFTYPE_STATION:
3690                 /* Schedule the time event to a bit before beacon 1,
3691                  * to make sure we're in the new channel when the
3692                  * GO/AP arrives.
3693                  */
3694                 apply_time = chsw->device_timestamp +
3695                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3696                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3697
3698                 if (chsw->block_tx)
3699                         iwl_mvm_csa_client_absent(mvm, vif);
3700
3701                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3702                                             apply_time);
3703                 if (mvmvif->bf_data.bf_enabled) {
3704                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3705                         if (ret)
3706                                 goto out_unlock;
3707                 }
3708
3709                 break;
3710         default:
3711                 break;
3712         }
3713
3714         mvmvif->ps_disabled = true;
3715
3716         ret = iwl_mvm_power_update_ps(mvm);
3717         if (ret)
3718                 goto out_unlock;
3719
3720         /* we won't be on this channel any longer */
3721         iwl_mvm_teardown_tdls_peers(mvm);
3722
3723 out_unlock:
3724         mutex_unlock(&mvm->mutex);
3725
3726         return ret;
3727 }
3728
3729 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3730                                        struct ieee80211_vif *vif)
3731 {
3732         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3733         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3734         int ret;
3735
3736         mutex_lock(&mvm->mutex);
3737
3738         if (mvmvif->csa_failed) {
3739                 mvmvif->csa_failed = false;
3740                 ret = -EIO;
3741                 goto out_unlock;
3742         }
3743
3744         if (vif->type == NL80211_IFTYPE_STATION) {
3745                 struct iwl_mvm_sta *mvmsta;
3746
3747                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3748                                                           mvmvif->ap_sta_id);
3749
3750                 if (WARN_ON(!mvmsta)) {
3751                         ret = -EIO;
3752                         goto out_unlock;
3753                 }
3754
3755                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3756
3757                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3758
3759                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3760                 if (ret)
3761                         goto out_unlock;
3762
3763                 iwl_mvm_stop_session_protection(mvm, vif);
3764         }
3765
3766         mvmvif->ps_disabled = false;
3767
3768         ret = iwl_mvm_power_update_ps(mvm);
3769
3770 out_unlock:
3771         mutex_unlock(&mvm->mutex);
3772
3773         return ret;
3774 }
3775
3776 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3777                               struct ieee80211_vif *vif, u32 queues, bool drop)
3778 {
3779         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3780         struct iwl_mvm_vif *mvmvif;
3781         struct iwl_mvm_sta *mvmsta;
3782         struct ieee80211_sta *sta;
3783         int i;
3784         u32 msk = 0;
3785
3786         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3787                 return;
3788
3789         mutex_lock(&mvm->mutex);
3790         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3791
3792         /* flush the AP-station and all TDLS peers */
3793         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3794                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3795                                                 lockdep_is_held(&mvm->mutex));
3796                 if (IS_ERR_OR_NULL(sta))
3797                         continue;
3798
3799                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3800                 if (mvmsta->vif != vif)
3801                         continue;
3802
3803                 /* make sure only TDLS peers or the AP are flushed */
3804                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3805
3806                 msk |= mvmsta->tfd_queue_msk;
3807         }
3808
3809         if (drop) {
3810                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3811                         IWL_ERR(mvm, "flush request fail\n");
3812                 mutex_unlock(&mvm->mutex);
3813         } else {
3814                 mutex_unlock(&mvm->mutex);
3815
3816                 /* this can take a while, and we may need/want other operations
3817                  * to succeed while doing this, so do it without the mutex held
3818                  */
3819                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3820         }
3821 }
3822
3823 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3824                                   struct survey_info *survey)
3825 {
3826         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3827         int ret;
3828
3829         memset(survey, 0, sizeof(*survey));
3830
3831         /* only support global statistics right now */
3832         if (idx != 0)
3833                 return -ENOENT;
3834
3835         if (!(mvm->fw->ucode_capa.capa[0] &
3836                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3837                 return -ENOENT;
3838
3839         mutex_lock(&mvm->mutex);
3840
3841         if (mvm->ucode_loaded) {
3842                 ret = iwl_mvm_request_statistics(mvm, false);
3843                 if (ret)
3844                         goto out;
3845         }
3846
3847         survey->filled = SURVEY_INFO_TIME |
3848                          SURVEY_INFO_TIME_RX |
3849                          SURVEY_INFO_TIME_TX |
3850                          SURVEY_INFO_TIME_SCAN;
3851         survey->time = mvm->accu_radio_stats.on_time_rf +
3852                        mvm->radio_stats.on_time_rf;
3853         do_div(survey->time, USEC_PER_MSEC);
3854
3855         survey->time_rx = mvm->accu_radio_stats.rx_time +
3856                           mvm->radio_stats.rx_time;
3857         do_div(survey->time_rx, USEC_PER_MSEC);
3858
3859         survey->time_tx = mvm->accu_radio_stats.tx_time +
3860                           mvm->radio_stats.tx_time;
3861         do_div(survey->time_tx, USEC_PER_MSEC);
3862
3863         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3864                             mvm->radio_stats.on_time_scan;
3865         do_div(survey->time_scan, USEC_PER_MSEC);
3866
3867         ret = 0;
3868  out:
3869         mutex_unlock(&mvm->mutex);
3870         return ret;
3871 }
3872
3873 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3874                                        struct ieee80211_vif *vif,
3875                                        struct ieee80211_sta *sta,
3876                                        struct station_info *sinfo)
3877 {
3878         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3879         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3880         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3881
3882         if (!(mvm->fw->ucode_capa.capa[0] &
3883                                 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3884                 return;
3885
3886         /* if beacon filtering isn't on mac80211 does it anyway */
3887         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3888                 return;
3889
3890         if (!vif->bss_conf.assoc)
3891                 return;
3892
3893         mutex_lock(&mvm->mutex);
3894
3895         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3896                 goto unlock;
3897
3898         if (iwl_mvm_request_statistics(mvm, false))
3899                 goto unlock;
3900
3901         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3902                            mvmvif->beacon_stats.accu_num_beacons;
3903         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3904         if (mvmvif->beacon_stats.avg_signal) {
3905                 /* firmware only reports a value after RXing a few beacons */
3906                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3907                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3908         }
3909  unlock:
3910         mutex_unlock(&mvm->mutex);
3911 }
3912
3913 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
3914                                        struct ieee80211_vif *vif,
3915                                        const struct ieee80211_event *event)
3916 {
3917 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3918         do {                                                    \
3919                 if ((_cnt) && --(_cnt))                         \
3920                         break;                                  \
3921                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3922         } while (0)
3923
3924         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3925         struct iwl_fw_dbg_trigger_tlv *trig;
3926         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3927
3928         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3929                 return;
3930
3931         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3932         trig_mlme = (void *)trig->data;
3933         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3934                 return;
3935
3936         if (event->u.mlme.data == ASSOC_EVENT) {
3937                 if (event->u.mlme.status == MLME_DENIED)
3938                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3939                                            trig_mlme->stop_assoc_denied,
3940                                            "DENIED ASSOC: reason %d",
3941                                             event->u.mlme.reason);
3942                 else if (event->u.mlme.status == MLME_TIMEOUT)
3943                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3944                                            trig_mlme->stop_assoc_timeout,
3945                                            "ASSOC TIMEOUT");
3946         } else if (event->u.mlme.data == AUTH_EVENT) {
3947                 if (event->u.mlme.status == MLME_DENIED)
3948                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3949                                            trig_mlme->stop_auth_denied,
3950                                            "DENIED AUTH: reason %d",
3951                                            event->u.mlme.reason);
3952                 else if (event->u.mlme.status == MLME_TIMEOUT)
3953                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3954                                            trig_mlme->stop_auth_timeout,
3955                                            "AUTH TIMEOUT");
3956         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3957                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3958                                    trig_mlme->stop_rx_deauth,
3959                                    "DEAUTH RX %d", event->u.mlme.reason);
3960         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3961                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3962                                    trig_mlme->stop_tx_deauth,
3963                                    "DEAUTH TX %d", event->u.mlme.reason);
3964         }
3965 #undef CHECK_MLME_TRIGGER
3966 }
3967
3968 const struct ieee80211_ops iwl_mvm_hw_ops = {
3969         .tx = iwl_mvm_mac_tx,
3970         .ampdu_action = iwl_mvm_mac_ampdu_action,
3971         .start = iwl_mvm_mac_start,
3972         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3973         .stop = iwl_mvm_mac_stop,
3974         .add_interface = iwl_mvm_mac_add_interface,
3975         .remove_interface = iwl_mvm_mac_remove_interface,
3976         .config = iwl_mvm_mac_config,
3977         .prepare_multicast = iwl_mvm_prepare_multicast,
3978         .configure_filter = iwl_mvm_configure_filter,
3979         .bss_info_changed = iwl_mvm_bss_info_changed,
3980         .hw_scan = iwl_mvm_mac_hw_scan,
3981         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3982         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3983         .sta_state = iwl_mvm_mac_sta_state,
3984         .sta_notify = iwl_mvm_mac_sta_notify,
3985         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3986         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3987         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3988         .sta_rc_update = iwl_mvm_sta_rc_update,
3989         .conf_tx = iwl_mvm_mac_conf_tx,
3990         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3991         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3992         .flush = iwl_mvm_mac_flush,
3993         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3994         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3995         .set_key = iwl_mvm_mac_set_key,
3996         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3997         .remain_on_channel = iwl_mvm_roc,
3998         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3999         .add_chanctx = iwl_mvm_add_chanctx,
4000         .remove_chanctx = iwl_mvm_remove_chanctx,
4001         .change_chanctx = iwl_mvm_change_chanctx,
4002         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4003         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4004         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4005
4006         .start_ap = iwl_mvm_start_ap_ibss,
4007         .stop_ap = iwl_mvm_stop_ap_ibss,
4008         .join_ibss = iwl_mvm_start_ap_ibss,
4009         .leave_ibss = iwl_mvm_stop_ap_ibss,
4010
4011         .set_tim = iwl_mvm_set_tim,
4012
4013         .channel_switch = iwl_mvm_channel_switch,
4014         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4015         .post_channel_switch = iwl_mvm_post_channel_switch,
4016
4017         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4018         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4019         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4020
4021         .event_callback = iwl_mvm_mac_event_callback,
4022
4023         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4024
4025 #ifdef CONFIG_PM_SLEEP
4026         /* look at d3.c */
4027         .suspend = iwl_mvm_suspend,
4028         .resume = iwl_mvm_resume,
4029         .set_wakeup = iwl_mvm_set_wakeup,
4030         .set_rekey_data = iwl_mvm_set_rekey_data,
4031 #if IS_ENABLED(CONFIG_IPV6)
4032         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4033 #endif
4034         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4035 #endif
4036         .get_survey = iwl_mvm_mac_get_survey,
4037         .sta_statistics = iwl_mvm_mac_sta_statistics,
4038 };