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

   1 /******************************************************************************
   2  *
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   4  * redistributing this file, you may do so under either license.
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   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
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  14  *
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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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  50  *    from this software without specific prior written permission.
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  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
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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_ERR_OR_ZERO(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_ERR_OR_ZERO(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         static const u32 mvm_ciphers[] = {
 419                 WLAN_CIPHER_SUITE_WEP40,
 420                 WLAN_CIPHER_SUITE_WEP104,
 421                 WLAN_CIPHER_SUITE_TKIP,
 422                 WLAN_CIPHER_SUITE_CCMP,
 423         };
 424
 425         /* Tell mac80211 our characteristics */
 426         ieee80211_hw_set(hw, SIGNAL_DBM);
 427         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 428         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 429         ieee80211_hw_set(hw, QUEUE_CONTROL);
 430         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 431         ieee80211_hw_set(hw, SUPPORTS_PS);
 432         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 433         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 434         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 435         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 436         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 437         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 438         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 439
 440         hw->queues = mvm->first_agg_queue;
 441         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 442         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 443                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 444         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 445                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 446         hw->rate_control_algorithm = "iwl-mvm-rs";
 447         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 448         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 449
 450         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 451         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 452         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 453         hw->wiphy->cipher_suites = mvm->ciphers;
 454
 455         /*
 456          * Enable 11w if advertised by firmware and software crypto
 457          * is not enabled (as the firmware will interpret some mgmt
 458          * packets, so enabling it with software crypto isn't safe)
 459          */
 460         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 461             !iwlwifi_mod_params.sw_crypto) {
 462                 ieee80211_hw_set(hw, MFP_CAPABLE);
 463                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 464                         WLAN_CIPHER_SUITE_AES_CMAC;
 465                 hw->wiphy->n_cipher_suites++;
 466         }
 467
 468         /* currently FW API supports only one optional cipher scheme */
 469         if (mvm->fw->cs[0].cipher) {
 470                 mvm->hw->n_cipher_schemes = 1;
 471                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 472                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 473                         mvm->fw->cs[0].cipher;
 474                 hw->wiphy->n_cipher_suites++;
 475         }
 476
 477         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 478         hw->wiphy->features |=
 479                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 480                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 481                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 482
 483         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 484         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 485         hw->chanctx_data_size = sizeof(u16);
 486
 487         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 488                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 489                 BIT(NL80211_IFTYPE_AP) |
 490                 BIT(NL80211_IFTYPE_P2P_GO) |
 491                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 492                 BIT(NL80211_IFTYPE_ADHOC);
 493
 494         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 495         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 496         if (iwl_mvm_is_lar_supported(mvm))
 497                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 498         else
 499                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 500                                                REGULATORY_DISABLE_BEACON_HINTS;
 501
 502         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 503                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 504
 505         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 506
 507         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 508         hw->wiphy->n_iface_combinations =
 509                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 510
 511         hw->wiphy->max_remain_on_channel_duration = 10000;
 512         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 513         /* we can compensate an offset of up to 3 channels = 15 MHz */
 514         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 515
 516         /* Extract MAC address */
 517         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 518         hw->wiphy->addresses = mvm->addresses;
 519         hw->wiphy->n_addresses = 1;
 520
 521         /* Extract additional MAC addresses if available */
 522         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 523                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 524
 525         for (i = 1; i < num_mac; i++) {
 526                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 527                        ETH_ALEN);
 528                 mvm->addresses[i].addr[5]++;
 529                 hw->wiphy->n_addresses++;
 530         }
 531
 532         iwl_mvm_reset_phy_ctxts(mvm);
 533
 534         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 535
 536         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 537
 538         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 539         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 540                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 541
 542         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 543                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 544         else
 545                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 546
 547         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 548                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 549                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 550         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
 551                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 552                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 553
 554                 if (fw_has_capa(&mvm->fw->ucode_capa,
 555                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 556                     fw_has_api(&mvm->fw->ucode_capa,
 557                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 558                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
 559                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 560         }
 561
 562         hw->wiphy->hw_version = mvm->trans->hw_id;
 563
 564         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 565                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 566         else
 567                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 568
 569         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 570         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 571         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 572         /* we create the 802.11 header and zero length SSID IE. */
 573         hw->wiphy->max_sched_scan_ie_len =
 574                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 575         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 576         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 577
 578         /*
 579          * the firmware uses u8 for num of iterations, but 0xff is saved for
 580          * infinite loop, so the maximum number of iterations is actually 254.
 581          */
 582         hw->wiphy->max_sched_scan_plan_iterations = 254;
 583
 584         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 585                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 586                                NL80211_FEATURE_P2P_GO_OPPPS |
 587                                NL80211_FEATURE_DYNAMIC_SMPS |
 588                                NL80211_FEATURE_STATIC_SMPS |
 589                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 590
 591         if (fw_has_capa(&mvm->fw->ucode_capa,
 592                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 593                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 594         if (fw_has_capa(&mvm->fw->ucode_capa,
 595                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 596                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 597
 598         if (fw_has_capa(&mvm->fw->ucode_capa,
 599                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 600                 hw->wiphy->features |=
 601                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 602
 603         if (fw_has_capa(&mvm->fw->ucode_capa,
 604                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 605                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 606
 607         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 608
 609 #ifdef CONFIG_PM_SLEEP
 610         if (iwl_mvm_is_d0i3_supported(mvm) &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 613                 hw->wiphy->wowlan = &mvm->wowlan;
 614         }
 615
 616         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 617             mvm->trans->ops->d3_suspend &&
 618             mvm->trans->ops->d3_resume &&
 619             device_can_wakeup(mvm->trans->dev)) {
 620                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 621                                      WIPHY_WOWLAN_DISCONNECT |
 622                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 623                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 624                                      WIPHY_WOWLAN_NET_DETECT;
 625                 if (!iwlwifi_mod_params.sw_crypto)
 626                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 627                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 628                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 629
 630                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 631                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 632                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 633                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 634                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 635                 hw->wiphy->wowlan = &mvm->wowlan;
 636         }
 637 #endif
 638
 639 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 640         /* assign default bcast filtering configuration */
 641         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 642 #endif
 643
 644         ret = iwl_mvm_leds_init(mvm);
 645         if (ret)
 646                 return ret;
 647
 648         if (fw_has_capa(&mvm->fw->ucode_capa,
 649                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 650                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 651                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 652                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 653         }
 654
 655         if (fw_has_capa(&mvm->fw->ucode_capa,
 656                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 657                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 658                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 659         }
 660
 661         hw->netdev_features |= mvm->cfg->features;
 662         if (!iwl_mvm_is_csum_supported(mvm))
 663                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 664
 665         ret = ieee80211_register_hw(mvm->hw);
 666         if (ret)
 667                 iwl_mvm_leds_exit(mvm);
 668
 669         return ret;
 670 }
 671
 672 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 673                              struct ieee80211_sta *sta,
 674                              struct sk_buff *skb)
 675 {
 676         struct iwl_mvm_sta *mvmsta;
 677         bool defer = false;
 678
 679         /*
 680          * double check the IN_D0I3 flag both before and after
 681          * taking the spinlock, in order to prevent taking
 682          * the spinlock when not needed.
 683          */
 684         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 685                 return false;
 686
 687         spin_lock(&mvm->d0i3_tx_lock);
 688         /*
 689          * testing the flag again ensures the skb dequeue
 690          * loop (on d0i3 exit) hasn't run yet.
 691          */
 692         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 693                 goto out;
 694
 695         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 696         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 697             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 698                 goto out;
 699
 700         __skb_queue_tail(&mvm->d0i3_tx, skb);
 701         ieee80211_stop_queues(mvm->hw);
 702
 703         /* trigger wakeup */
 704         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 705         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 706
 707         defer = true;
 708 out:
 709         spin_unlock(&mvm->d0i3_tx_lock);
 710         return defer;
 711 }
 712
 713 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 714                            struct ieee80211_tx_control *control,
 715                            struct sk_buff *skb)
 716 {
 717         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 718         struct ieee80211_sta *sta = control->sta;
 719         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 720         struct ieee80211_hdr *hdr = (void *)skb->data;
 721
 722         if (iwl_mvm_is_radio_killed(mvm)) {
 723                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 724                 goto drop;
 725         }
 726
 727         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 728             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 729             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 730                 goto drop;
 731
 732         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 733         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 734                      ieee80211_is_mgmt(hdr->frame_control) &&
 735                      !ieee80211_is_deauth(hdr->frame_control) &&
 736                      !ieee80211_is_disassoc(hdr->frame_control) &&
 737                      !ieee80211_is_action(hdr->frame_control)))
 738                 sta = NULL;
 739
 740         if (sta) {
 741                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 742                         return;
 743                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 744                         goto drop;
 745                 return;
 746         }
 747
 748         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 749                 goto drop;
 750         return;
 751  drop:
 752         ieee80211_free_txskb(hw, skb);
 753 }
 754
 755 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 756 {
 757         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 758                 return false;
 759         return true;
 760 }
 761
 762 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 763 {
 764         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 765                 return false;
 766         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 767                 return true;
 768
 769         /* enabled by default */
 770         return true;
 771 }
 772
 773 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 774         do {                                                    \
 775                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 776                         break;                                  \
 777                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 778         } while (0)
 779
 780 static void
 781 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 782                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 783                             enum ieee80211_ampdu_mlme_action action)
 784 {
 785         struct iwl_fw_dbg_trigger_tlv *trig;
 786         struct iwl_fw_dbg_trigger_ba *ba_trig;
 787
 788         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 789                 return;
 790
 791         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 792         ba_trig = (void *)trig->data;
 793
 794         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 795                 return;
 796
 797         switch (action) {
 798         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 799                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 800                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 801
 802                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 803                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 804                                  sta->addr, tid, tid_data->ssn);
 805                 break;
 806                 }
 807         case IEEE80211_AMPDU_TX_STOP_CONT:
 808                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 809                                  "TX AGG STOP: MAC %pM tid %d\n",
 810                                  sta->addr, tid);
 811                 break;
 812         case IEEE80211_AMPDU_RX_START:
 813                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 814                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 815                                  sta->addr, tid, rx_ba_ssn);
 816                 break;
 817         case IEEE80211_AMPDU_RX_STOP:
 818                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 819                                  "RX AGG STOP: MAC %pM tid %d\n",
 820                                  sta->addr, tid);
 821                 break;
 822         default:
 823                 break;
 824         }
 825 }
 826
 827 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 828                                     struct ieee80211_vif *vif,
 829                                     enum ieee80211_ampdu_mlme_action action,
 830                                     struct ieee80211_sta *sta, u16 tid,
 831                                     u16 *ssn, u8 buf_size, bool amsdu)
 832 {
 833         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 834         int ret;
 835         bool tx_agg_ref = false;
 836
 837         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 838                      sta->addr, tid, action);
 839
 840         if (!(mvm->nvm_data->sku_cap_11n_enable))
 841                 return -EACCES;
 842
 843         /* return from D0i3 before starting a new Tx aggregation */
 844         switch (action) {
 845         case IEEE80211_AMPDU_TX_START:
 846         case IEEE80211_AMPDU_TX_STOP_CONT:
 847         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 848         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 849         case IEEE80211_AMPDU_TX_OPERATIONAL:
 850                 /*
 851                  * for tx start, wait synchronously until D0i3 exit to
 852                  * get the correct sequence number for the tid.
 853                  * additionally, some other ampdu actions use direct
 854                  * target access, which is not handled automatically
 855                  * by the trans layer (unlike commands), so wait for
 856                  * d0i3 exit in these cases as well.
 857                  */
 858                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 859                 if (ret)
 860                         return ret;
 861
 862                 tx_agg_ref = true;
 863                 break;
 864         default:
 865                 break;
 866         }
 867
 868         mutex_lock(&mvm->mutex);
 869
 870         switch (action) {
 871         case IEEE80211_AMPDU_RX_START:
 872                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 873                         ret = -EINVAL;
 874                         break;
 875                 }
 876                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 877                 break;
 878         case IEEE80211_AMPDU_RX_STOP:
 879                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 880                 break;
 881         case IEEE80211_AMPDU_TX_START:
 882                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 883                         ret = -EINVAL;
 884                         break;
 885                 }
 886                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 887                 break;
 888         case IEEE80211_AMPDU_TX_STOP_CONT:
 889                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 890                 break;
 891         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 892         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 893                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 894                 break;
 895         case IEEE80211_AMPDU_TX_OPERATIONAL:
 896                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 897                 break;
 898         default:
 899                 WARN_ON_ONCE(1);
 900                 ret = -EINVAL;
 901                 break;
 902         }
 903
 904         if (!ret) {
 905                 u16 rx_ba_ssn = 0;
 906
 907                 if (action == IEEE80211_AMPDU_RX_START)
 908                         rx_ba_ssn = *ssn;
 909
 910                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 911                                             rx_ba_ssn, action);
 912         }
 913         mutex_unlock(&mvm->mutex);
 914
 915         /*
 916          * If the tid is marked as started, we won't use it for offloaded
 917          * traffic on the next D0i3 entry. It's safe to unref.
 918          */
 919         if (tx_agg_ref)
 920                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 921
 922         return ret;
 923 }
 924
 925 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 926                                      struct ieee80211_vif *vif)
 927 {
 928         struct iwl_mvm *mvm = data;
 929         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 930
 931         mvmvif->uploaded = false;
 932         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 933
 934         spin_lock_bh(&mvm->time_event_lock);
 935         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 936         spin_unlock_bh(&mvm->time_event_lock);
 937
 938         mvmvif->phy_ctxt = NULL;
 939         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 940 }
 941
 942 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 943                                      const void *data, size_t datalen)
 944 {
 945         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 946         ssize_t bytes_read;
 947         ssize_t bytes_read_trans;
 948
 949         if (offset < dump_ptrs->op_mode_len) {
 950                 bytes_read = min_t(ssize_t, count,
 951                                    dump_ptrs->op_mode_len - offset);
 952                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 953                        bytes_read);
 954                 offset += bytes_read;
 955                 count -= bytes_read;
 956
 957                 if (count == 0)
 958                         return bytes_read;
 959         } else {
 960                 bytes_read = 0;
 961         }
 962
 963         if (!dump_ptrs->trans_ptr)
 964                 return bytes_read;
 965
 966         offset -= dump_ptrs->op_mode_len;
 967         bytes_read_trans = min_t(ssize_t, count,
 968                                  dump_ptrs->trans_ptr->len - offset);
 969         memcpy(buffer + bytes_read,
 970                (u8 *)dump_ptrs->trans_ptr->data + offset,
 971                bytes_read_trans);
 972
 973         return bytes_read + bytes_read_trans;
 974 }
 975
 976 static void iwl_mvm_free_coredump(const void *data)
 977 {
 978         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 979
 980         vfree(fw_error_dump->op_mode_ptr);
 981         vfree(fw_error_dump->trans_ptr);
 982         kfree(fw_error_dump);
 983 }
 984
 985 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 986                                struct iwl_fw_error_dump_data **dump_data)
 987 {
 988         struct iwl_fw_error_dump_fifo *fifo_hdr;
 989         u32 *fifo_data;
 990         u32 fifo_len;
 991         unsigned long flags;
 992         int i, j;
 993
 994         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 995                 return;
 996
 997         /* Pull RXF data from all RXFs */
 998         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 999                 /*
1000                  * Keep aside the additional offset that might be needed for
1001                  * next RXF
1002                  */
1003                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
1004
1005                 fifo_hdr = (void *)(*dump_data)->data;
1006                 fifo_data = (void *)fifo_hdr->data;
1007                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1008
1009                 /* No need to try to read the data if the length is 0 */
1010                 if (fifo_len == 0)
1011                         continue;
1012
1013                 /* Add a TLV for the RXF */
1014                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1015                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1016
1017                 fifo_hdr->fifo_num = cpu_to_le32(i);
1018                 fifo_hdr->available_bytes =
1019                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1020                                                         RXF_RD_D_SPACE +
1021                                                         offset_diff));
1022                 fifo_hdr->wr_ptr =
1023                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1024                                                         RXF_RD_WR_PTR +
1025                                                         offset_diff));
1026                 fifo_hdr->rd_ptr =
1027                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1028                                                         RXF_RD_RD_PTR +
1029                                                         offset_diff));
1030                 fifo_hdr->fence_ptr =
1031                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1032                                                         RXF_RD_FENCE_PTR +
1033                                                         offset_diff));
1034                 fifo_hdr->fence_mode =
1035                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1036                                                         RXF_SET_FENCE_MODE +
1037                                                         offset_diff));
1038
1039                 /* Lock fence */
1040                 iwl_trans_write_prph(mvm->trans,
1041                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1042                 /* Set fence pointer to the same place like WR pointer */
1043                 iwl_trans_write_prph(mvm->trans,
1044                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1045                 /* Set fence offset */
1046                 iwl_trans_write_prph(mvm->trans,
1047                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1048                                      0x0);
1049
1050                 /* Read FIFO */
1051                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1052                 for (j = 0; j < fifo_len; j++)
1053                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1054                                                          RXF_FIFO_RD_FENCE_INC +
1055                                                          offset_diff);
1056                 *dump_data = iwl_fw_error_next_data(*dump_data);
1057         }
1058
1059         /* Pull TXF data from all TXFs */
1060         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1061                 /* Mark the number of TXF we're pulling now */
1062                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1063
1064                 fifo_hdr = (void *)(*dump_data)->data;
1065                 fifo_data = (void *)fifo_hdr->data;
1066                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1067
1068                 /* No need to try to read the data if the length is 0 */
1069                 if (fifo_len == 0)
1070                         continue;
1071
1072                 /* Add a TLV for the FIFO */
1073                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1074                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1075
1076                 fifo_hdr->fifo_num = cpu_to_le32(i);
1077                 fifo_hdr->available_bytes =
1078                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1079                                                         TXF_FIFO_ITEM_CNT));
1080                 fifo_hdr->wr_ptr =
1081                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1082                                                         TXF_WR_PTR));
1083                 fifo_hdr->rd_ptr =
1084                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1085                                                         TXF_RD_PTR));
1086                 fifo_hdr->fence_ptr =
1087                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1088                                                         TXF_FENCE_PTR));
1089                 fifo_hdr->fence_mode =
1090                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1091                                                         TXF_LOCK_FENCE));
1092
1093                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1094                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1095                                      TXF_WR_PTR);
1096
1097                 /* Dummy-read to advance the read pointer to the head */
1098                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1099
1100                 /* Read FIFO */
1101                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1102                 for (j = 0; j < fifo_len; j++)
1103                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1104                                                           TXF_READ_MODIFY_DATA);
1105                 *dump_data = iwl_fw_error_next_data(*dump_data);
1106         }
1107
1108         iwl_trans_release_nic_access(mvm->trans, &flags);
1109 }
1110
1111 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1112 {
1113         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1114             !mvm->fw_dump_desc)
1115                 return;
1116
1117         kfree(mvm->fw_dump_desc);
1118         mvm->fw_dump_desc = NULL;
1119 }
1120
1121 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1122 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1123
1124 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1125 {
1126         struct iwl_fw_error_dump_file *dump_file;
1127         struct iwl_fw_error_dump_data *dump_data;
1128         struct iwl_fw_error_dump_info *dump_info;
1129         struct iwl_fw_error_dump_mem *dump_mem;
1130         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1131         struct iwl_mvm_dump_ptrs *fw_error_dump;
1132         u32 sram_len, sram_ofs;
1133         u32 file_len, fifo_data_len = 0;
1134         u32 smem_len = mvm->cfg->smem_len;
1135         u32 sram2_len = mvm->cfg->dccm2_len;
1136         bool monitor_dump_only = false;
1137
1138         lockdep_assert_held(&mvm->mutex);
1139
1140         /* there's no point in fw dump if the bus is dead */
1141         if (test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) {
1142                 IWL_ERR(mvm, "Skip fw error dump since bus is dead\n");
1143                 return;
1144         }
1145
1146         if (mvm->fw_dump_trig &&
1147             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1148                 monitor_dump_only = true;
1149
1150         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1151         if (!fw_error_dump)
1152                 return;
1153
1154         /* SRAM - include stack CCM if driver knows the values for it */
1155         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1156                 const struct fw_img *img;
1157
1158                 img = &mvm->fw->img[mvm->cur_ucode];
1159                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1160                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1161         } else {
1162                 sram_ofs = mvm->cfg->dccm_offset;
1163                 sram_len = mvm->cfg->dccm_len;
1164         }
1165
1166         /* reading RXF/TXF sizes */
1167         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1168                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1169                 int i;
1170
1171                 fifo_data_len = 0;
1172
1173                 /* Count RXF size */
1174                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1175                         if (!mem_cfg->rxfifo_size[i])
1176                                 continue;
1177
1178                         /* Add header info */
1179                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1180                                          sizeof(*dump_data) +
1181                                          sizeof(struct iwl_fw_error_dump_fifo);
1182                 }
1183
1184                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1185                         if (!mem_cfg->txfifo_size[i])
1186                                 continue;
1187
1188                         /* Add header info */
1189                         fifo_data_len += mem_cfg->txfifo_size[i] +
1190                                          sizeof(*dump_data) +
1191                                          sizeof(struct iwl_fw_error_dump_fifo);
1192                 }
1193         }
1194
1195         file_len = sizeof(*dump_file) +
1196                    sizeof(*dump_data) * 2 +
1197                    sram_len + sizeof(*dump_mem) +
1198                    fifo_data_len +
1199                    sizeof(*dump_info);
1200
1201         /* Make room for the SMEM, if it exists */
1202         if (smem_len)
1203                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1204
1205         /* Make room for the secondary SRAM, if it exists */
1206         if (sram2_len)
1207                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1208
1209         /* Make room for fw's virtual image pages, if it exists */
1210         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
1211                 file_len += mvm->num_of_paging_blk *
1212                         (sizeof(*dump_data) +
1213                          sizeof(struct iwl_fw_error_dump_paging) +
1214                          PAGING_BLOCK_SIZE);
1215
1216         /* If we only want a monitor dump, reset the file length */
1217         if (monitor_dump_only) {
1218                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1219                            sizeof(*dump_info);
1220         }
1221
1222         /*
1223          * In 8000 HW family B-step include the ICCM (which resides separately)
1224          */
1225         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1226             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1227                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1228                             IWL8260_ICCM_LEN;
1229
1230         if (mvm->fw_dump_desc)
1231                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1232                             mvm->fw_dump_desc->len;
1233
1234         dump_file = vzalloc(file_len);
1235         if (!dump_file) {
1236                 kfree(fw_error_dump);
1237                 iwl_mvm_free_fw_dump_desc(mvm);
1238                 return;
1239         }
1240
1241         fw_error_dump->op_mode_ptr = dump_file;
1242
1243         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1244         dump_data = (void *)dump_file->data;
1245
1246         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1247         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1248         dump_info = (void *) dump_data->data;
1249         dump_info->device_family =
1250                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1251                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1252                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1253         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1254         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1255                sizeof(dump_info->fw_human_readable));
1256         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1257                 sizeof(dump_info->dev_human_readable));
1258         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1259                 sizeof(dump_info->bus_human_readable));
1260
1261         dump_data = iwl_fw_error_next_data(dump_data);
1262         /* We only dump the FIFOs if the FW is in error state */
1263         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1264                 iwl_mvm_dump_fifos(mvm, &dump_data);
1265
1266         if (mvm->fw_dump_desc) {
1267                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1268                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1269                                              mvm->fw_dump_desc->len);
1270                 dump_trig = (void *)dump_data->data;
1271                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1272                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1273
1274                 /* now we can free this copy */
1275                 iwl_mvm_free_fw_dump_desc(mvm);
1276                 dump_data = iwl_fw_error_next_data(dump_data);
1277         }
1278
1279         /* In case we only want monitor dump, skip to dump trasport data */
1280         if (monitor_dump_only)
1281                 goto dump_trans_data;
1282
1283         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1284         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1285         dump_mem = (void *)dump_data->data;
1286         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1287         dump_mem->offset = cpu_to_le32(sram_ofs);
1288         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1289                                  sram_len);
1290
1291         if (smem_len) {
1292                 dump_data = iwl_fw_error_next_data(dump_data);
1293                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1294                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1295                 dump_mem = (void *)dump_data->data;
1296                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1297                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1298                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1299                                          dump_mem->data, smem_len);
1300         }
1301
1302         if (sram2_len) {
1303                 dump_data = iwl_fw_error_next_data(dump_data);
1304                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1305                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1306                 dump_mem = (void *)dump_data->data;
1307                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1308                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1309                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1310                                          dump_mem->data, sram2_len);
1311         }
1312
1313         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1314             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1315                 dump_data = iwl_fw_error_next_data(dump_data);
1316                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1317                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1318                                              sizeof(*dump_mem));
1319                 dump_mem = (void *)dump_data->data;
1320                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1321                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1322                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1323                                          dump_mem->data, IWL8260_ICCM_LEN);
1324         }
1325
1326         /* Dump fw's virtual image */
1327         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
1328                 u32 i;
1329
1330                 for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
1331                         struct iwl_fw_error_dump_paging *paging;
1332                         struct page *pages =
1333                                 mvm->fw_paging_db[i].fw_paging_block;
1334
1335                         dump_data = iwl_fw_error_next_data(dump_data);
1336                         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
1337                         dump_data->len = cpu_to_le32(sizeof(*paging) +
1338                                                      PAGING_BLOCK_SIZE);
1339                         paging = (void *)dump_data->data;
1340                         paging->index = cpu_to_le32(i);
1341                         memcpy(paging->data, page_address(pages),
1342                                PAGING_BLOCK_SIZE);
1343                 }
1344         }
1345
1346 dump_trans_data:
1347         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1348                                                        mvm->fw_dump_trig);
1349         fw_error_dump->op_mode_len = file_len;
1350         if (fw_error_dump->trans_ptr)
1351                 file_len += fw_error_dump->trans_ptr->len;
1352         dump_file->file_len = cpu_to_le32(file_len);
1353
1354         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1355                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1356
1357         mvm->fw_dump_trig = NULL;
1358         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1359 }
1360
1361 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1362         .trig_desc = {
1363                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1364         },
1365 };
1366
1367 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1368 {
1369         /* clear the D3 reconfig, we only need it to avoid dumping a
1370          * firmware coredump on reconfiguration, we shouldn't do that
1371          * on D3->D0 transition
1372          */
1373         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1374                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1375                 iwl_mvm_fw_error_dump(mvm);
1376         }
1377
1378         /* cleanup all stale references (scan, roc), but keep the
1379          * ucode_down ref until reconfig is complete
1380          */
1381         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1382
1383         iwl_trans_stop_device(mvm->trans);
1384
1385         mvm->scan_status = 0;
1386         mvm->ps_disabled = false;
1387         mvm->calibrating = false;
1388
1389         /* just in case one was running */
1390         ieee80211_remain_on_channel_expired(mvm->hw);
1391
1392         /*
1393          * cleanup all interfaces, even inactive ones, as some might have
1394          * gone down during the HW restart
1395          */
1396         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1397
1398         mvm->p2p_device_vif = NULL;
1399         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1400
1401         iwl_mvm_reset_phy_ctxts(mvm);
1402         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1403         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1404         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1405         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1406         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1407         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1408         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1409         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1410
1411         ieee80211_wake_queues(mvm->hw);
1412
1413         /* clear any stale d0i3 state */
1414         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1415
1416         mvm->vif_count = 0;
1417         mvm->rx_ba_sessions = 0;
1418         mvm->fw_dbg_conf = FW_DBG_INVALID;
1419
1420         /* keep statistics ticking */
1421         iwl_mvm_accu_radio_stats(mvm);
1422 }
1423
1424 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1425 {
1426         int ret;
1427
1428         lockdep_assert_held(&mvm->mutex);
1429
1430         /* Clean up some internal and mac80211 state on restart */
1431         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1432                 iwl_mvm_restart_cleanup(mvm);
1433
1434         ret = iwl_mvm_up(mvm);
1435
1436         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1437                 /* Something went wrong - we need to finish some cleanup
1438                  * that normally iwl_mvm_mac_restart_complete() below
1439                  * would do.
1440                  */
1441                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1442                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1443         }
1444
1445         return ret;
1446 }
1447
1448 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1449 {
1450         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1451         int ret;
1452
1453         /* Some hw restart cleanups must not hold the mutex */
1454         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1455                 /*
1456                  * Make sure we are out of d0i3. This is needed
1457                  * to make sure the reference accounting is correct
1458                  * (and there is no stale d0i3_exit_work).
1459                  */
1460                 wait_event_timeout(mvm->d0i3_exit_waitq,
1461                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1462                                              &mvm->status),
1463                                    HZ);
1464         }
1465
1466         mutex_lock(&mvm->mutex);
1467         ret = __iwl_mvm_mac_start(mvm);
1468         mutex_unlock(&mvm->mutex);
1469
1470         return ret;
1471 }
1472
1473 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1474 {
1475         int ret;
1476
1477         mutex_lock(&mvm->mutex);
1478
1479         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1480         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1481         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1482         if (ret)
1483                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1484                         ret);
1485
1486         /* allow transport/FW low power modes */
1487         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1488
1489         /*
1490          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1491          * of packets the FW sent out, so we must reconnect.
1492          */
1493         iwl_mvm_teardown_tdls_peers(mvm);
1494
1495         mutex_unlock(&mvm->mutex);
1496 }
1497
1498 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1499 {
1500         if (!iwl_mvm_is_d0i3_supported(mvm))
1501                 return;
1502
1503         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1504                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1505                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1506                                                   &mvm->status),
1507                                         HZ))
1508                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1509 }
1510
1511 static void
1512 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1513                               enum ieee80211_reconfig_type reconfig_type)
1514 {
1515         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1516
1517         switch (reconfig_type) {
1518         case IEEE80211_RECONFIG_TYPE_RESTART:
1519                 iwl_mvm_restart_complete(mvm);
1520                 break;
1521         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1522                 iwl_mvm_resume_complete(mvm);
1523                 break;
1524         }
1525 }
1526
1527 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1528 {
1529         lockdep_assert_held(&mvm->mutex);
1530
1531         /* firmware counters are obviously reset now, but we shouldn't
1532          * partially track so also clear the fw_reset_accu counters.
1533          */
1534         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1535
1536         /*
1537          * Disallow low power states when the FW is down by taking
1538          * the UCODE_DOWN ref. in case of ongoing hw restart the
1539          * ref is already taken, so don't take it again.
1540          */
1541         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1542                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1543
1544         /* async_handlers_wk is now blocked */
1545
1546         /*
1547          * The work item could be running or queued if the
1548          * ROC time event stops just as we get here.
1549          */
1550         flush_work(&mvm->roc_done_wk);
1551
1552         iwl_trans_stop_device(mvm->trans);
1553
1554         iwl_mvm_async_handlers_purge(mvm);
1555         /* async_handlers_list is empty and will stay empty: HW is stopped */
1556
1557         /* the fw is stopped, the aux sta is dead: clean up driver state */
1558         iwl_mvm_del_aux_sta(mvm);
1559
1560         iwl_free_fw_paging(mvm);
1561
1562         /*
1563          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1564          * won't be called in this case).
1565          * But make sure to cleanup interfaces that have gone down before/during
1566          * HW restart was requested.
1567          */
1568         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1569                 ieee80211_iterate_interfaces(mvm->hw, 0,
1570                                              iwl_mvm_cleanup_iterator, mvm);
1571
1572         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1573          * make sure there's nothing left there and warn if any is found.
1574          */
1575         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1576                 int i;
1577
1578                 for (i = 0; i < mvm->max_scans; i++) {
1579                         if (WARN_ONCE(mvm->scan_uid_status[i],
1580                                       "UMAC scan UID %d status was not cleaned\n",
1581                                       i))
1582                                 mvm->scan_uid_status[i] = 0;
1583                 }
1584         }
1585
1586         mvm->ucode_loaded = false;
1587 }
1588
1589 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1590 {
1591         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1592
1593         flush_work(&mvm->d0i3_exit_work);
1594         flush_work(&mvm->async_handlers_wk);
1595         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1596         iwl_mvm_free_fw_dump_desc(mvm);
1597
1598         mutex_lock(&mvm->mutex);
1599         __iwl_mvm_mac_stop(mvm);
1600         mutex_unlock(&mvm->mutex);
1601
1602         /*
1603          * The worker might have been waiting for the mutex, let it run and
1604          * discover that its list is now empty.
1605          */
1606         cancel_work_sync(&mvm->async_handlers_wk);
1607 }
1608
1609 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1610 {
1611         u16 i;
1612
1613         lockdep_assert_held(&mvm->mutex);
1614
1615         for (i = 0; i < NUM_PHY_CTX; i++)
1616                 if (!mvm->phy_ctxts[i].ref)
1617                         return &mvm->phy_ctxts[i];
1618
1619         IWL_ERR(mvm, "No available PHY context\n");
1620         return NULL;
1621 }
1622
1623 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1624                                 s16 tx_power)
1625 {
1626         struct iwl_dev_tx_power_cmd cmd = {
1627                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1628                 .v2.mac_context_id =
1629                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1630                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1631         };
1632         int len = sizeof(cmd);
1633
1634         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1635                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1636
1637         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1638                 len = sizeof(cmd.v2);
1639
1640         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1641 }
1642
1643 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1644                                      struct ieee80211_vif *vif)
1645 {
1646         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1647         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1648         int ret;
1649
1650         mvmvif->mvm = mvm;
1651
1652         /*
1653          * make sure D0i3 exit is completed, otherwise a target access
1654          * during tx queue configuration could be done when still in
1655          * D0i3 state.
1656          */
1657         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1658         if (ret)
1659                 return ret;
1660
1661         /*
1662          * Not much to do here. The stack will not allow interface
1663          * types or combinations that we didn't advertise, so we
1664          * don't really have to check the types.
1665          */
1666
1667         mutex_lock(&mvm->mutex);
1668
1669         /* make sure that beacon statistics don't go backwards with FW reset */
1670         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1671                 mvmvif->beacon_stats.accu_num_beacons +=
1672                         mvmvif->beacon_stats.num_beacons;
1673
1674         /* Allocate resources for the MAC context, and add it to the fw  */
1675         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1676         if (ret)
1677                 goto out_unlock;
1678
1679         /* Counting number of interfaces is needed for legacy PM */
1680         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1681                 mvm->vif_count++;
1682
1683         /*
1684          * The AP binding flow can be done only after the beacon
1685          * template is configured (which happens only in the mac80211
1686          * start_ap() flow), and adding the broadcast station can happen
1687          * only after the binding.
1688          * In addition, since modifying the MAC before adding a bcast
1689          * station is not allowed by the FW, delay the adding of MAC context to
1690          * the point where we can also add the bcast station.
1691          * In short: there's not much we can do at this point, other than
1692          * allocating resources :)
1693          */
1694         if (vif->type == NL80211_IFTYPE_AP ||
1695             vif->type == NL80211_IFTYPE_ADHOC) {
1696                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1697                 if (ret) {
1698                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1699                         goto out_release;
1700                 }
1701
1702                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1703                 goto out_unlock;
1704         }
1705
1706         mvmvif->features |= hw->netdev_features;
1707
1708         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1709         if (ret)
1710                 goto out_release;
1711
1712         ret = iwl_mvm_power_update_mac(mvm);
1713         if (ret)
1714                 goto out_remove_mac;
1715
1716         /* beacon filtering */
1717         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1718         if (ret)
1719                 goto out_remove_mac;
1720
1721         if (!mvm->bf_allowed_vif &&
1722             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1723                 mvm->bf_allowed_vif = mvmvif;
1724                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1725                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1726         }
1727
1728         /*
1729          * P2P_DEVICE interface does not have a channel context assigned to it,
1730          * so a dedicated PHY context is allocated to it and the corresponding
1731          * MAC context is bound to it at this stage.
1732          */
1733         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1734
1735                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1736                 if (!mvmvif->phy_ctxt) {
1737                         ret = -ENOSPC;
1738                         goto out_free_bf;
1739                 }
1740
1741                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1742                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1743                 if (ret)
1744                         goto out_unref_phy;
1745
1746                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1747                 if (ret)
1748                         goto out_unbind;
1749
1750                 /* Save a pointer to p2p device vif, so it can later be used to
1751                  * update the p2p device MAC when a GO is started/stopped */
1752                 mvm->p2p_device_vif = vif;
1753         }
1754
1755         iwl_mvm_vif_dbgfs_register(mvm, vif);
1756         goto out_unlock;
1757
1758  out_unbind:
1759         iwl_mvm_binding_remove_vif(mvm, vif);
1760  out_unref_phy:
1761         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1762  out_free_bf:
1763         if (mvm->bf_allowed_vif == mvmvif) {
1764                 mvm->bf_allowed_vif = NULL;
1765                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1766                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1767         }
1768  out_remove_mac:
1769         mvmvif->phy_ctxt = NULL;
1770         iwl_mvm_mac_ctxt_remove(mvm, vif);
1771  out_release:
1772         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1773                 mvm->vif_count--;
1774
1775         iwl_mvm_mac_ctxt_release(mvm, vif);
1776  out_unlock:
1777         mutex_unlock(&mvm->mutex);
1778
1779         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1780
1781         return ret;
1782 }
1783
1784 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1785                                         struct ieee80211_vif *vif)
1786 {
1787         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1788
1789         if (tfd_msk) {
1790                 /*
1791                  * mac80211 first removes all the stations of the vif and
1792                  * then removes the vif. When it removes a station it also
1793                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1794                  * of all the stations of this vif are closed, and the queues
1795                  * of these AMPDU sessions are properly closed.
1796                  * We still need to take care of the shared queues of the vif.
1797                  * Flush them here.
1798                  */
1799                 mutex_lock(&mvm->mutex);
1800                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1801                 mutex_unlock(&mvm->mutex);
1802
1803                 /*
1804                  * There are transports that buffer a few frames in the host.
1805                  * For these, the flush above isn't enough since while we were
1806                  * flushing, the transport might have sent more frames to the
1807                  * device. To solve this, wait here until the transport is
1808                  * empty. Technically, this could have replaced the flush
1809                  * above, but flush is much faster than draining. So flush
1810                  * first, and drain to make sure we have no frames in the
1811                  * transport anymore.
1812                  * If a station still had frames on the shared queues, it is
1813                  * already marked as draining, so to complete the draining, we
1814                  * just need to wait until the transport is empty.
1815                  */
1816                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1817         }
1818
1819         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1820                 /*
1821                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1822                  * We assume here that all the packets sent to the OFFCHANNEL
1823                  * queue are sent in ROC session.
1824                  */
1825                 flush_work(&mvm->roc_done_wk);
1826         } else {
1827                 /*
1828                  * By now, all the AC queues are empty. The AGG queues are
1829                  * empty too. We already got all the Tx responses for all the
1830                  * packets in the queues. The drain work can have been
1831                  * triggered. Flush it.
1832                  */
1833                 flush_work(&mvm->sta_drained_wk);
1834         }
1835 }
1836
1837 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1838                                          struct ieee80211_vif *vif)
1839 {
1840         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1841         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1842
1843         iwl_mvm_prepare_mac_removal(mvm, vif);
1844
1845         mutex_lock(&mvm->mutex);
1846
1847         if (mvm->bf_allowed_vif == mvmvif) {
1848                 mvm->bf_allowed_vif = NULL;
1849                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1850                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1851         }
1852
1853         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1854
1855         /*
1856          * For AP/GO interface, the tear down of the resources allocated to the
1857          * interface is be handled as part of the stop_ap flow.
1858          */
1859         if (vif->type == NL80211_IFTYPE_AP ||
1860             vif->type == NL80211_IFTYPE_ADHOC) {
1861 #ifdef CONFIG_NL80211_TESTMODE
1862                 if (vif == mvm->noa_vif) {
1863                         mvm->noa_vif = NULL;
1864                         mvm->noa_duration = 0;
1865                 }
1866 #endif
1867                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1868                 goto out_release;
1869         }
1870
1871         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1872                 mvm->p2p_device_vif = NULL;
1873                 iwl_mvm_rm_bcast_sta(mvm, vif);
1874                 iwl_mvm_binding_remove_vif(mvm, vif);
1875                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1876                 mvmvif->phy_ctxt = NULL;
1877         }
1878
1879         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1880                 mvm->vif_count--;
1881
1882         iwl_mvm_power_update_mac(mvm);
1883         iwl_mvm_mac_ctxt_remove(mvm, vif);
1884
1885 out_release:
1886         iwl_mvm_mac_ctxt_release(mvm, vif);
1887         mutex_unlock(&mvm->mutex);
1888 }
1889
1890 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1891 {
1892         return 0;
1893 }
1894
1895 struct iwl_mvm_mc_iter_data {
1896         struct iwl_mvm *mvm;
1897         int port_id;
1898 };
1899
1900 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1901                                       struct ieee80211_vif *vif)
1902 {
1903         struct iwl_mvm_mc_iter_data *data = _data;
1904         struct iwl_mvm *mvm = data->mvm;
1905         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1906         int ret, len;
1907
1908         /* if we don't have free ports, mcast frames will be dropped */
1909         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1910                 return;
1911
1912         if (vif->type != NL80211_IFTYPE_STATION ||
1913             !vif->bss_conf.assoc)
1914                 return;
1915
1916         cmd->port_id = data->port_id++;
1917         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1918         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1919
1920         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1921         if (ret)
1922                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1923 }
1924
1925 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1926 {
1927         struct iwl_mvm_mc_iter_data iter_data = {
1928                 .mvm = mvm,
1929         };
1930
1931         lockdep_assert_held(&mvm->mutex);
1932
1933         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1934                 return;
1935
1936         ieee80211_iterate_active_interfaces_atomic(
1937                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1938                 iwl_mvm_mc_iface_iterator, &iter_data);
1939 }
1940
1941 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1942                                      struct netdev_hw_addr_list *mc_list)
1943 {
1944         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1945         struct iwl_mcast_filter_cmd *cmd;
1946         struct netdev_hw_addr *addr;
1947         int addr_count;
1948         bool pass_all;
1949         int len;
1950
1951         addr_count = netdev_hw_addr_list_count(mc_list);
1952         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1953                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1954         if (pass_all)
1955                 addr_count = 0;
1956
1957         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1958         cmd = kzalloc(len, GFP_ATOMIC);
1959         if (!cmd)
1960                 return 0;
1961
1962         if (pass_all) {
1963                 cmd->pass_all = 1;
1964                 return (u64)(unsigned long)cmd;
1965         }
1966
1967         netdev_hw_addr_list_for_each(addr, mc_list) {
1968                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1969                                    cmd->count, addr->addr);
1970                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1971                        addr->addr, ETH_ALEN);
1972                 cmd->count++;
1973         }
1974
1975         return (u64)(unsigned long)cmd;
1976 }
1977
1978 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1979                                      unsigned int changed_flags,
1980                                      unsigned int *total_flags,
1981                                      u64 multicast)
1982 {
1983         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1984         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1985
1986         mutex_lock(&mvm->mutex);
1987
1988         /* replace previous configuration */
1989         kfree(mvm->mcast_filter_cmd);
1990         mvm->mcast_filter_cmd = cmd;
1991
1992         if (!cmd)
1993                 goto out;
1994
1995         iwl_mvm_recalc_multicast(mvm);
1996 out:
1997         mutex_unlock(&mvm->mutex);
1998         *total_flags = 0;
1999 }
2000
2001 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
2002                                         struct ieee80211_vif *vif,
2003                                         unsigned int filter_flags,
2004                                         unsigned int changed_flags)
2005 {
2006         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2007
2008         /* We support only filter for probe requests */
2009         if (!(changed_flags & FIF_PROBE_REQ))
2010                 return;
2011
2012         /* Supported only for p2p client interfaces */
2013         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
2014             !vif->p2p)
2015                 return;
2016
2017         mutex_lock(&mvm->mutex);
2018         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2019         mutex_unlock(&mvm->mutex);
2020 }
2021
2022 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
2023 struct iwl_bcast_iter_data {
2024         struct iwl_mvm *mvm;
2025         struct iwl_bcast_filter_cmd *cmd;
2026         u8 current_filter;
2027 };
2028
2029 static void
2030 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
2031                          const struct iwl_fw_bcast_filter *in_filter,
2032                          struct iwl_fw_bcast_filter *out_filter)
2033 {
2034         struct iwl_fw_bcast_filter_attr *attr;
2035         int i;
2036
2037         memcpy(out_filter, in_filter, sizeof(*out_filter));
2038
2039         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
2040                 attr = &out_filter->attrs[i];
2041
2042                 if (!attr->mask)
2043                         break;
2044
2045                 switch (attr->reserved1) {
2046                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
2047                         if (vif->bss_conf.arp_addr_cnt != 1) {
2048                                 attr->mask = 0;
2049                                 continue;
2050                         }
2051
2052                         attr->val = vif->bss_conf.arp_addr_list[0];
2053                         break;
2054                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
2055                         attr->val = *(__be32 *)&vif->addr[2];
2056                         break;
2057                 default:
2058                         break;
2059                 }
2060                 attr->reserved1 = 0;
2061                 out_filter->num_attrs++;
2062         }
2063 }
2064
2065 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2066                                           struct ieee80211_vif *vif)
2067 {
2068         struct iwl_bcast_iter_data *data = _data;
2069         struct iwl_mvm *mvm = data->mvm;
2070         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2071         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2072         struct iwl_fw_bcast_mac *bcast_mac;
2073         int i;
2074
2075         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2076                 return;
2077
2078         bcast_mac = &cmd->macs[mvmvif->id];
2079
2080         /*
2081          * enable filtering only for associated stations, but not for P2P
2082          * Clients
2083          */
2084         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2085             !vif->bss_conf.assoc)
2086                 return;
2087
2088         bcast_mac->default_discard = 1;
2089
2090         /* copy all configured filters */
2091         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2092                 /*
2093                  * Make sure we don't exceed our filters limit.
2094                  * if there is still a valid filter to be configured,
2095                  * be on the safe side and just allow bcast for this mac.
2096                  */
2097                 if (WARN_ON_ONCE(data->current_filter >=
2098                                  ARRAY_SIZE(cmd->filters))) {
2099                         bcast_mac->default_discard = 0;
2100                         bcast_mac->attached_filters = 0;
2101                         break;
2102                 }
2103
2104                 iwl_mvm_set_bcast_filter(vif,
2105                                          &mvm->bcast_filters[i],
2106                                          &cmd->filters[data->current_filter]);
2107
2108                 /* skip current filter if it contains no attributes */
2109                 if (!cmd->filters[data->current_filter].num_attrs)
2110                         continue;
2111
2112                 /* attach the filter to current mac */
2113                 bcast_mac->attached_filters |=
2114                                 cpu_to_le16(BIT(data->current_filter));
2115
2116                 data->current_filter++;
2117         }
2118 }
2119
2120 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2121                                     struct iwl_bcast_filter_cmd *cmd)
2122 {
2123         struct iwl_bcast_iter_data iter_data = {
2124                 .mvm = mvm,
2125                 .cmd = cmd,
2126         };
2127
2128         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2129                 return false;
2130
2131         memset(cmd, 0, sizeof(*cmd));
2132         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2133         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2134
2135 #ifdef CONFIG_IWLWIFI_DEBUGFS
2136         /* use debugfs filters/macs if override is configured */
2137         if (mvm->dbgfs_bcast_filtering.override) {
2138                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2139                        sizeof(cmd->filters));
2140                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2141                        sizeof(cmd->macs));
2142                 return true;
2143         }
2144 #endif
2145
2146         /* if no filters are configured, do nothing */
2147         if (!mvm->bcast_filters)
2148                 return false;
2149
2150         /* configure and attach these filters for each associated sta vif */
2151         ieee80211_iterate_active_interfaces(
2152                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2153                 iwl_mvm_bcast_filter_iterator, &iter_data);
2154
2155         return true;
2156 }
2157 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2158                                           struct ieee80211_vif *vif)
2159 {
2160         struct iwl_bcast_filter_cmd cmd;
2161
2162         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2163                 return 0;
2164
2165         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2166                 return 0;
2167
2168         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2169                                     sizeof(cmd), &cmd);
2170 }
2171 #else
2172 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2173                                                  struct ieee80211_vif *vif)
2174 {
2175         return 0;
2176 }
2177 #endif
2178
2179 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2180                                              struct ieee80211_vif *vif,
2181                                              struct ieee80211_bss_conf *bss_conf,
2182                                              u32 changes)
2183 {
2184         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2185         int ret;
2186
2187         /*
2188          * Re-calculate the tsf id, as the master-slave relations depend on the
2189          * beacon interval, which was not known when the station interface was
2190          * added.
2191          */
2192         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2193                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2194
2195         /*
2196          * If we're not associated yet, take the (new) BSSID before associating
2197          * so the firmware knows. If we're already associated, then use the old
2198          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2199          * branch for disassociation below.
2200          */
2201         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2202                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2203
2204         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2205         if (ret)
2206                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2207
2208         /* after sending it once, adopt mac80211 data */
2209         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2210         mvmvif->associated = bss_conf->assoc;
2211
2212         if (changes & BSS_CHANGED_ASSOC) {
2213                 if (bss_conf->assoc) {
2214                         /* clear statistics to get clean beacon counter */
2215                         iwl_mvm_request_statistics(mvm, true);
2216                         memset(&mvmvif->beacon_stats, 0,
2217                                sizeof(mvmvif->beacon_stats));
2218
2219                         /* add quota for this interface */
2220                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2221                         if (ret) {
2222                                 IWL_ERR(mvm, "failed to update quotas\n");
2223                                 return;
2224                         }
2225
2226                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2227                                      &mvm->status)) {
2228                                 /*
2229                                  * If we're restarting then the firmware will
2230                                  * obviously have lost synchronisation with
2231                                  * the AP. It will attempt to synchronise by
2232                                  * itself, but we can make it more reliable by
2233                                  * scheduling a session protection time event.
2234                                  *
2235                                  * The firmware needs to receive a beacon to
2236                                  * catch up with synchronisation, use 110% of
2237                                  * the beacon interval.
2238                                  *
2239                                  * Set a large maximum delay to allow for more
2240                                  * than a single interface.
2241                                  */
2242                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2243                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2244                                                         5 * dur, false);
2245                         }
2246
2247                         iwl_mvm_sf_update(mvm, vif, false);
2248                         iwl_mvm_power_vif_assoc(mvm, vif);
2249                         if (vif->p2p) {
2250                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2251                                 iwl_mvm_update_smps(mvm, vif,
2252                                                     IWL_MVM_SMPS_REQ_PROT,
2253                                                     IEEE80211_SMPS_DYNAMIC);
2254                         }
2255                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2256                         /*
2257                          * If update fails - SF might be running in associated
2258                          * mode while disassociated - which is forbidden.
2259                          */
2260                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2261                                   "Failed to update SF upon disassociation\n");
2262
2263                         /* remove AP station now that the MAC is unassoc */
2264                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2265                         if (ret)
2266                                 IWL_ERR(mvm, "failed to remove AP station\n");
2267
2268                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2269                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2270                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2271                         /* remove quota for this interface */
2272                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2273                         if (ret)
2274                                 IWL_ERR(mvm, "failed to update quotas\n");
2275
2276                         if (vif->p2p)
2277                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2278
2279                         /* this will take the cleared BSSID from bss_conf */
2280                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2281                         if (ret)
2282                                 IWL_ERR(mvm,
2283                                         "failed to update MAC %pM (clear after unassoc)\n",
2284                                         vif->addr);
2285                 }
2286
2287                 iwl_mvm_recalc_multicast(mvm);
2288                 iwl_mvm_configure_bcast_filter(mvm, vif);
2289
2290                 /* reset rssi values */
2291                 mvmvif->bf_data.ave_beacon_signal = 0;
2292
2293                 iwl_mvm_bt_coex_vif_change(mvm);
2294                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2295                                     IEEE80211_SMPS_AUTOMATIC);
2296         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2297                 /*
2298                  * We received a beacon _after_ association so
2299                  * remove the session protection.
2300                  */
2301                 iwl_mvm_remove_time_event(mvm, mvmvif,
2302                                           &mvmvif->time_event_data);
2303         }
2304
2305         if (changes & BSS_CHANGED_BEACON_INFO) {
2306                 iwl_mvm_sf_update(mvm, vif, false);
2307                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2308         }
2309
2310         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2311                 ret = iwl_mvm_power_update_mac(mvm);
2312                 if (ret)
2313                         IWL_ERR(mvm, "failed to update power mode\n");
2314         }
2315
2316         if (changes & BSS_CHANGED_TXPOWER) {
2317                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2318                                 bss_conf->txpower);
2319                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2320         }
2321
2322         if (changes & BSS_CHANGED_CQM) {
2323                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2324                 /* reset cqm events tracking */
2325                 mvmvif->bf_data.last_cqm_event = 0;
2326                 if (mvmvif->bf_data.bf_enabled) {
2327                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2328                         if (ret)
2329                                 IWL_ERR(mvm,
2330                                         "failed to update CQM thresholds\n");
2331                 }
2332         }
2333
2334         if (changes & BSS_CHANGED_ARP_FILTER) {
2335                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2336                 iwl_mvm_configure_bcast_filter(mvm, vif);
2337         }
2338 }
2339
2340 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2341                                  struct ieee80211_vif *vif)
2342 {
2343         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2344         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2345         int ret;
2346
2347         /*
2348          * iwl_mvm_mac_ctxt_add() might read directly from the device
2349          * (the system time), so make sure it is available.
2350          */
2351         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2352         if (ret)
2353                 return ret;
2354
2355         mutex_lock(&mvm->mutex);
2356
2357         /* Send the beacon template */
2358         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2359         if (ret)
2360                 goto out_unlock;
2361
2362         /*
2363          * Re-calculate the tsf id, as the master-slave relations depend on the
2364          * beacon interval, which was not known when the AP interface was added.
2365          */
2366         if (vif->type == NL80211_IFTYPE_AP)
2367                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2368
2369         mvmvif->ap_assoc_sta_count = 0;
2370
2371         /* Add the mac context */
2372         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2373         if (ret)
2374                 goto out_unlock;
2375
2376         /* Perform the binding */
2377         ret = iwl_mvm_binding_add_vif(mvm, vif);
2378         if (ret)
2379                 goto out_remove;
2380
2381         /* Send the bcast station. At this stage the TBTT and DTIM time events
2382          * are added and applied to the scheduler */
2383         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2384         if (ret)
2385                 goto out_unbind;
2386
2387         /* must be set before quota calculations */
2388         mvmvif->ap_ibss_active = true;
2389
2390         /* power updated needs to be done before quotas */
2391         iwl_mvm_power_update_mac(mvm);
2392
2393         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2394         if (ret)
2395                 goto out_quota_failed;
2396
2397         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2398         if (vif->p2p && mvm->p2p_device_vif)
2399                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2400
2401         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2402
2403         iwl_mvm_bt_coex_vif_change(mvm);
2404
2405         /* we don't support TDLS during DCM */
2406         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2407                 iwl_mvm_teardown_tdls_peers(mvm);
2408
2409         goto out_unlock;
2410
2411 out_quota_failed:
2412         iwl_mvm_power_update_mac(mvm);
2413         mvmvif->ap_ibss_active = false;
2414         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2415 out_unbind:
2416         iwl_mvm_binding_remove_vif(mvm, vif);
2417 out_remove:
2418         iwl_mvm_mac_ctxt_remove(mvm, vif);
2419 out_unlock:
2420         mutex_unlock(&mvm->mutex);
2421         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2422         return ret;
2423 }
2424
2425 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2426                                  struct ieee80211_vif *vif)
2427 {
2428         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2429         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2430
2431         iwl_mvm_prepare_mac_removal(mvm, vif);
2432
2433         mutex_lock(&mvm->mutex);
2434
2435         /* Handle AP stop while in CSA */
2436         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2437                 iwl_mvm_remove_time_event(mvm, mvmvif,
2438                                           &mvmvif->time_event_data);
2439                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2440                 mvmvif->csa_countdown = false;
2441         }
2442
2443         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2444                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2445                 mvm->csa_tx_block_bcn_timeout = 0;
2446         }
2447
2448         mvmvif->ap_ibss_active = false;
2449         mvm->ap_last_beacon_gp2 = 0;
2450
2451         iwl_mvm_bt_coex_vif_change(mvm);
2452
2453         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2454
2455         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2456         if (vif->p2p && mvm->p2p_device_vif)
2457                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2458
2459         iwl_mvm_update_quotas(mvm, false, NULL);
2460         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2461         iwl_mvm_binding_remove_vif(mvm, vif);
2462
2463         iwl_mvm_power_update_mac(mvm);
2464
2465         iwl_mvm_mac_ctxt_remove(mvm, vif);
2466
2467         mutex_unlock(&mvm->mutex);
2468 }
2469
2470 static void
2471 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2472                                  struct ieee80211_vif *vif,
2473                                  struct ieee80211_bss_conf *bss_conf,
2474                                  u32 changes)
2475 {
2476         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2477
2478         /* Changes will be applied when the AP/IBSS is started */
2479         if (!mvmvif->ap_ibss_active)
2480                 return;
2481
2482         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2483                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2484             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2485                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2486
2487         /* Need to send a new beacon template to the FW */
2488         if (changes & BSS_CHANGED_BEACON &&
2489             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2490                 IWL_WARN(mvm, "Failed updating beacon data\n");
2491
2492         if (changes & BSS_CHANGED_TXPOWER) {
2493                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2494                                 bss_conf->txpower);
2495                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2496         }
2497
2498 }
2499
2500 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2501                                      struct ieee80211_vif *vif,
2502                                      struct ieee80211_bss_conf *bss_conf,
2503                                      u32 changes)
2504 {
2505         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2506
2507         /*
2508          * iwl_mvm_bss_info_changed_station() might call
2509          * iwl_mvm_protect_session(), which reads directly from
2510          * the device (the system time), so make sure it is available.
2511          */
2512         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2513                 return;
2514
2515         mutex_lock(&mvm->mutex);
2516
2517         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2518                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2519
2520         switch (vif->type) {
2521         case NL80211_IFTYPE_STATION:
2522                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2523                 break;
2524         case NL80211_IFTYPE_AP:
2525         case NL80211_IFTYPE_ADHOC:
2526                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2527                 break;
2528         default:
2529                 /* shouldn't happen */
2530                 WARN_ON_ONCE(1);
2531         }
2532
2533         mutex_unlock(&mvm->mutex);
2534         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2535 }
2536
2537 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2538                                struct ieee80211_vif *vif,
2539                                struct ieee80211_scan_request *hw_req)
2540 {
2541         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2542         int ret;
2543
2544         if (hw_req->req.n_channels == 0 ||
2545             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2546                 return -EINVAL;
2547
2548         mutex_lock(&mvm->mutex);
2549         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2550         mutex_unlock(&mvm->mutex);
2551
2552         return ret;
2553 }
2554
2555 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2556                                        struct ieee80211_vif *vif)
2557 {
2558         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2559
2560         mutex_lock(&mvm->mutex);
2561
2562         /* Due to a race condition, it's possible that mac80211 asks
2563          * us to stop a hw_scan when it's already stopped.  This can
2564          * happen, for instance, if we stopped the scan ourselves,
2565          * called ieee80211_scan_completed() and the userspace called
2566          * cancel scan scan before ieee80211_scan_work() could run.
2567          * To handle that, simply return if the scan is not running.
2568         */
2569         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2570                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2571
2572         mutex_unlock(&mvm->mutex);
2573 }
2574
2575 static void
2576 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2577                                   struct ieee80211_sta *sta, u16 tids,
2578                                   int num_frames,
2579                                   enum ieee80211_frame_release_type reason,
2580                                   bool more_data)
2581 {
2582         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2583
2584         /* Called when we need to transmit (a) frame(s) from mac80211 */
2585
2586         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2587                                           tids, more_data, false);
2588 }
2589
2590 static void
2591 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2592                                     struct ieee80211_sta *sta, u16 tids,
2593                                     int num_frames,
2594                                     enum ieee80211_frame_release_type reason,
2595                                     bool more_data)
2596 {
2597         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2598
2599         /* Called when we need to transmit (a) frame(s) from agg queue */
2600
2601         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2602                                           tids, more_data, true);
2603 }
2604
2605 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2606                                    struct ieee80211_vif *vif,
2607                                    enum sta_notify_cmd cmd,
2608                                    struct ieee80211_sta *sta)
2609 {
2610         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2611         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2612         unsigned long txqs = 0, tids = 0;
2613         int tid;
2614
2615         spin_lock_bh(&mvmsta->lock);
2616         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2617                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2618
2619                 if (tid_data->state != IWL_AGG_ON &&
2620                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2621                         continue;
2622
2623                 __set_bit(tid_data->txq_id, &txqs);
2624
2625                 if (iwl_mvm_tid_queued(tid_data) == 0)
2626                         continue;
2627
2628                 __set_bit(tid, &tids);
2629         }
2630
2631         switch (cmd) {
2632         case STA_NOTIFY_SLEEP:
2633                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2634                         ieee80211_sta_block_awake(hw, sta, true);
2635
2636                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2637                         ieee80211_sta_set_buffered(sta, tid, true);
2638
2639                 if (txqs)
2640                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2641                 /*
2642                  * The fw updates the STA to be asleep. Tx packets on the Tx
2643                  * queues to this station will not be transmitted. The fw will
2644                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2645                  */
2646                 break;
2647         case STA_NOTIFY_AWAKE:
2648                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2649                         break;
2650
2651                 if (txqs)
2652                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2653                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2654                 break;
2655         default:
2656                 break;
2657         }
2658         spin_unlock_bh(&mvmsta->lock);
2659 }
2660
2661 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2662                                        struct ieee80211_vif *vif,
2663                                        struct ieee80211_sta *sta)
2664 {
2665         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2666         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2667         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2668
2669         /*
2670          * This is called before mac80211 does RCU synchronisation,
2671          * so here we already invalidate our internal RCU-protected
2672          * station pointer. The rest of the code will thus no longer
2673          * be able to find the station this way, and we don't rely
2674          * on further RCU synchronisation after the sta_state()
2675          * callback deleted the station.
2676          */
2677         mutex_lock(&mvm->mutex);
2678         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2679                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2680                                    ERR_PTR(-ENOENT));
2681
2682         if (mvm_sta->vif->type == NL80211_IFTYPE_AP) {
2683                 mvmvif->ap_assoc_sta_count--;
2684                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2685         }
2686
2687         mutex_unlock(&mvm->mutex);
2688 }
2689
2690 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2691                                 const u8 *bssid)
2692 {
2693         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2694                 return;
2695
2696         if (iwlwifi_mod_params.uapsd_disable) {
2697                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2698                 return;
2699         }
2700
2701         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2702 }
2703
2704 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2705                                  struct ieee80211_vif *vif,
2706                                  struct ieee80211_sta *sta,
2707                                  enum ieee80211_sta_state old_state,
2708                                  enum ieee80211_sta_state new_state)
2709 {
2710         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2711         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2712         int ret;
2713
2714         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2715                            sta->addr, old_state, new_state);
2716
2717         /* this would be a mac80211 bug ... but don't crash */
2718         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2719                 return -EINVAL;
2720
2721         /* if a STA is being removed, reuse its ID */
2722         flush_work(&mvm->sta_drained_wk);
2723
2724         mutex_lock(&mvm->mutex);
2725         if (old_state == IEEE80211_STA_NOTEXIST &&
2726             new_state == IEEE80211_STA_NONE) {
2727                 /*
2728                  * Firmware bug - it'll crash if the beacon interval is less
2729                  * than 16. We can't avoid connecting at all, so refuse the
2730                  * station state change, this will cause mac80211 to abandon
2731                  * attempts to connect to this AP, and eventually wpa_s will
2732                  * blacklist the AP...
2733                  */
2734                 if (vif->type == NL80211_IFTYPE_STATION &&
2735                     vif->bss_conf.beacon_int < 16) {
2736                         IWL_ERR(mvm,
2737                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2738                                 sta->addr, vif->bss_conf.beacon_int);
2739                         ret = -EINVAL;
2740                         goto out_unlock;
2741                 }
2742
2743                 if (sta->tdls &&
2744                     (vif->p2p ||
2745                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2746                                                 IWL_MVM_TDLS_STA_COUNT ||
2747                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2748                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2749                         ret = -EBUSY;
2750                         goto out_unlock;
2751                 }
2752
2753                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2754                 if (sta->tdls && ret == 0)
2755                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2756         } else if (old_state == IEEE80211_STA_NONE &&
2757                    new_state == IEEE80211_STA_AUTH) {
2758                 /*
2759                  * EBS may be disabled due to previous failures reported by FW.
2760                  * Reset EBS status here assuming environment has been changed.
2761                  */
2762                 mvm->last_ebs_successful = true;
2763                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2764                 ret = 0;
2765         } else if (old_state == IEEE80211_STA_AUTH &&
2766                    new_state == IEEE80211_STA_ASSOC) {
2767                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2768                 if (ret == 0)
2769                         iwl_mvm_rs_rate_init(mvm, sta,
2770                                              mvmvif->phy_ctxt->channel->band,
2771                                              true);
2772         } else if (old_state == IEEE80211_STA_ASSOC &&
2773                    new_state == IEEE80211_STA_AUTHORIZED) {
2774
2775                 /* we don't support TDLS during DCM */
2776                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2777                         iwl_mvm_teardown_tdls_peers(mvm);
2778
2779                 /* enable beacon filtering */
2780                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2781                 ret = 0;
2782         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2783                    new_state == IEEE80211_STA_ASSOC) {
2784                 /* disable beacon filtering */
2785                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2786                 ret = 0;
2787         } else if (old_state == IEEE80211_STA_ASSOC &&
2788                    new_state == IEEE80211_STA_AUTH) {
2789                 ret = 0;
2790         } else if (old_state == IEEE80211_STA_AUTH &&
2791                    new_state == IEEE80211_STA_NONE) {
2792                 ret = 0;
2793         } else if (old_state == IEEE80211_STA_NONE &&
2794                    new_state == IEEE80211_STA_NOTEXIST) {
2795                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2796                 if (sta->tdls)
2797                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2798         } else {
2799                 ret = -EIO;
2800         }
2801  out_unlock:
2802         mutex_unlock(&mvm->mutex);
2803
2804         if (sta->tdls && ret == 0) {
2805                 if (old_state == IEEE80211_STA_NOTEXIST &&
2806                     new_state == IEEE80211_STA_NONE)
2807                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2808                 else if (old_state == IEEE80211_STA_NONE &&
2809                          new_state == IEEE80211_STA_NOTEXIST)
2810                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2811         }
2812
2813         return ret;
2814 }
2815
2816 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2817 {
2818         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2819
2820         mvm->rts_threshold = value;
2821
2822         return 0;
2823 }
2824
2825 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2826                                   struct ieee80211_vif *vif,
2827                                   struct ieee80211_sta *sta, u32 changed)
2828 {
2829         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2830
2831         if (vif->type == NL80211_IFTYPE_STATION &&
2832             changed & IEEE80211_RC_NSS_CHANGED)
2833                 iwl_mvm_sf_update(mvm, vif, false);
2834 }
2835
2836 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2837                                struct ieee80211_vif *vif, u16 ac,
2838                                const struct ieee80211_tx_queue_params *params)
2839 {
2840         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2841         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2842
2843         mvmvif->queue_params[ac] = *params;
2844
2845         /*
2846          * No need to update right away, we'll get BSS_CHANGED_QOS
2847          * The exception is P2P_DEVICE interface which needs immediate update.
2848          */
2849         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2850                 int ret;
2851
2852                 mutex_lock(&mvm->mutex);
2853                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2854                 mutex_unlock(&mvm->mutex);
2855                 return ret;
2856         }
2857         return 0;
2858 }
2859
2860 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2861                                       struct ieee80211_vif *vif)
2862 {
2863         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2864         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2865                            200 + vif->bss_conf.beacon_int);
2866         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2867                                100 + vif->bss_conf.beacon_int);
2868
2869         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2870                 return;
2871
2872         /*
2873          * iwl_mvm_protect_session() reads directly from the device
2874          * (the system time), so make sure it is available.
2875          */
2876         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2877                 return;
2878
2879         mutex_lock(&mvm->mutex);
2880         /* Try really hard to protect the session and hear a beacon */
2881         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2882         mutex_unlock(&mvm->mutex);
2883
2884         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2885 }
2886
2887 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2888                                         struct ieee80211_vif *vif,
2889                                         struct cfg80211_sched_scan_request *req,
2890                                         struct ieee80211_scan_ies *ies)
2891 {
2892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2893
2894         int ret;
2895
2896         mutex_lock(&mvm->mutex);
2897
2898         if (!vif->bss_conf.idle) {
2899                 ret = -EBUSY;
2900                 goto out;
2901         }
2902
2903         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2904
2905 out:
2906         mutex_unlock(&mvm->mutex);
2907         return ret;
2908 }
2909
2910 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2911                                        struct ieee80211_vif *vif)
2912 {
2913         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2914         int ret;
2915
2916         mutex_lock(&mvm->mutex);
2917
2918         /* Due to a race condition, it's possible that mac80211 asks
2919          * us to stop a sched_scan when it's already stopped.  This
2920          * can happen, for instance, if we stopped the scan ourselves,
2921          * called ieee80211_sched_scan_stopped() and the userspace called
2922          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2923          * could run.  To handle this, simply return if the scan is
2924          * not running.
2925         */
2926         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2927                 mutex_unlock(&mvm->mutex);
2928                 return 0;
2929         }
2930
2931         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2932         mutex_unlock(&mvm->mutex);
2933         iwl_mvm_wait_for_async_handlers(mvm);
2934
2935         return ret;
2936 }
2937
2938 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2939                                enum set_key_cmd cmd,
2940                                struct ieee80211_vif *vif,
2941                                struct ieee80211_sta *sta,
2942                                struct ieee80211_key_conf *key)
2943 {
2944         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2945         int ret;
2946         u8 key_offset;
2947
2948         if (iwlwifi_mod_params.sw_crypto) {
2949                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2950                 return -EOPNOTSUPP;
2951         }
2952
2953         switch (key->cipher) {
2954         case WLAN_CIPHER_SUITE_TKIP:
2955                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2956                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2957                 break;
2958         case WLAN_CIPHER_SUITE_CCMP:
2959                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2960                 break;
2961         case WLAN_CIPHER_SUITE_AES_CMAC:
2962                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2963                 break;
2964         case WLAN_CIPHER_SUITE_WEP40:
2965         case WLAN_CIPHER_SUITE_WEP104:
2966                 /* For non-client mode, only use WEP keys for TX as we probably
2967                  * don't have a station yet anyway and would then have to keep
2968                  * track of the keys, linking them to each of the clients/peers
2969                  * as they appear. For now, don't do that, for performance WEP
2970                  * offload doesn't really matter much, but we need it for some
2971                  * other offload features in client mode.
2972                  */
2973                 if (vif->type != NL80211_IFTYPE_STATION)
2974                         return 0;
2975                 break;
2976         default:
2977                 /* currently FW supports only one optional cipher scheme */
2978                 if (hw->n_cipher_schemes &&
2979                     hw->cipher_schemes->cipher == key->cipher)
2980                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2981                 else
2982                         return -EOPNOTSUPP;
2983         }
2984
2985         mutex_lock(&mvm->mutex);
2986
2987         switch (cmd) {
2988         case SET_KEY:
2989                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2990                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2991                         /*
2992                          * GTK on AP interface is a TX-only key, return 0;
2993                          * on IBSS they're per-station and because we're lazy
2994                          * we don't support them for RX, so do the same.
2995                          */
2996                         ret = 0;
2997                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2998                         break;
2999                 }
3000
3001                 /* During FW restart, in order to restore the state as it was,
3002                  * don't try to reprogram keys we previously failed for.
3003                  */
3004                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
3005                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
3006                         IWL_DEBUG_MAC80211(mvm,
3007                                            "skip invalid idx key programming during restart\n");
3008                         ret = 0;
3009                         break;
3010                 }
3011
3012                 /* in HW restart reuse the index, otherwise request a new one */
3013                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
3014                         key_offset = key->hw_key_idx;
3015                 else
3016                         key_offset = STA_KEY_IDX_INVALID;
3017
3018                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
3019                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
3020                 if (ret) {
3021                         IWL_WARN(mvm, "set key failed\n");
3022                         /*
3023                          * can't add key for RX, but we don't need it
3024                          * in the device for TX so still return 0
3025                          */
3026                         key->hw_key_idx = STA_KEY_IDX_INVALID;
3027                         ret = 0;
3028                 }
3029
3030                 break;
3031         case DISABLE_KEY:
3032                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
3033                         ret = 0;
3034                         break;
3035                 }
3036
3037                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
3038                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
3039                 break;
3040         default:
3041                 ret = -EINVAL;
3042         }
3043
3044         mutex_unlock(&mvm->mutex);
3045         return ret;
3046 }
3047
3048 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
3049                                         struct ieee80211_vif *vif,
3050                                         struct ieee80211_key_conf *keyconf,
3051                                         struct ieee80211_sta *sta,
3052                                         u32 iv32, u16 *phase1key)
3053 {
3054         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3055
3056         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
3057                 return;
3058
3059         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
3060 }
3061
3062
3063 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3064                                struct iwl_rx_packet *pkt, void *data)
3065 {
3066         struct iwl_mvm *mvm =
3067                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3068         struct iwl_hs20_roc_res *resp;
3069         int resp_len = iwl_rx_packet_payload_len(pkt);
3070         struct iwl_mvm_time_event_data *te_data = data;
3071
3072         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3073                 return true;
3074
3075         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3076                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3077                 return true;
3078         }
3079
3080         resp = (void *)pkt->data;
3081
3082         IWL_DEBUG_TE(mvm,
3083                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3084                      resp->status, resp->event_unique_id);
3085
3086         te_data->uid = le32_to_cpu(resp->event_unique_id);
3087         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3088                      te_data->uid);
3089
3090         spin_lock_bh(&mvm->time_event_lock);
3091         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3092         spin_unlock_bh(&mvm->time_event_lock);
3093
3094         return true;
3095 }
3096
3097 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3098 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3099                                     struct ieee80211_channel *channel,
3100                                     struct ieee80211_vif *vif,
3101                                     int duration)
3102 {
3103         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3104         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3105         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3106         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3107         struct iwl_notification_wait wait_time_event;
3108         struct iwl_hs20_roc_req aux_roc_req = {
3109                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3110                 .id_and_color =
3111                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3112                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3113                 /* Set the channel info data */
3114                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3115                         PHY_BAND_24 : PHY_BAND_5,
3116                 .channel_info.channel = channel->hw_value,
3117                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3118                 /* Set the time and duration */
3119                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3120                 .apply_time_max_delay =
3121                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3122                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3123          };
3124
3125         /* Set the node address */
3126         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3127
3128         lockdep_assert_held(&mvm->mutex);
3129
3130         spin_lock_bh(&mvm->time_event_lock);
3131
3132         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3133                 spin_unlock_bh(&mvm->time_event_lock);
3134                 return -EIO;
3135         }
3136
3137         te_data->vif = vif;
3138         te_data->duration = duration;
3139         te_data->id = HOT_SPOT_CMD;
3140
3141         spin_unlock_bh(&mvm->time_event_lock);
3142
3143         /*
3144          * Use a notification wait, which really just processes the
3145          * command response and doesn't wait for anything, in order
3146          * to be able to process the response and get the UID inside
3147          * the RX path. Using CMD_WANT_SKB doesn't work because it
3148          * stores the buffer and then wakes up this thread, by which
3149          * time another notification (that the time event started)
3150          * might already be processed unsuccessfully.
3151          */
3152         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3153                                    time_event_response,
3154                                    ARRAY_SIZE(time_event_response),
3155                                    iwl_mvm_rx_aux_roc, te_data);
3156
3157         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3158                                    &aux_roc_req);
3159
3160         if (res) {
3161                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3162                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3163                 goto out_clear_te;
3164         }
3165
3166         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3167         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3168         /* should never fail */
3169         WARN_ON_ONCE(res);
3170
3171         if (res) {
3172  out_clear_te:
3173                 spin_lock_bh(&mvm->time_event_lock);
3174                 iwl_mvm_te_clear_data(mvm, te_data);
3175                 spin_unlock_bh(&mvm->time_event_lock);
3176         }
3177
3178         return res;
3179 }
3180
3181 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3182                        struct ieee80211_vif *vif,
3183                        struct ieee80211_channel *channel,
3184                        int duration,
3185                        enum ieee80211_roc_type type)
3186 {
3187         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3188         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3189         struct cfg80211_chan_def chandef;
3190         struct iwl_mvm_phy_ctxt *phy_ctxt;
3191         int ret, i;
3192
3193         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3194                            duration, type);
3195
3196         flush_work(&mvm->roc_done_wk);
3197
3198         mutex_lock(&mvm->mutex);
3199
3200         switch (vif->type) {
3201         case NL80211_IFTYPE_STATION:
3202                 if (fw_has_capa(&mvm->fw->ucode_capa,
3203                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3204                         /* Use aux roc framework (HS20) */
3205                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3206                                                        vif, duration);
3207                         goto out_unlock;
3208                 }
3209                 IWL_ERR(mvm, "hotspot not supported\n");
3210                 ret = -EINVAL;
3211                 goto out_unlock;
3212         case NL80211_IFTYPE_P2P_DEVICE:
3213                 /* handle below */
3214                 break;
3215         default:
3216                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3217                 ret = -EINVAL;
3218                 goto out_unlock;
3219         }
3220
3221         for (i = 0; i < NUM_PHY_CTX; i++) {
3222                 phy_ctxt = &mvm->phy_ctxts[i];
3223                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3224                         continue;
3225
3226                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3227                         /*
3228                          * Unbind the P2P_DEVICE from the current PHY context,
3229                          * and if the PHY context is not used remove it.
3230                          */
3231                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3232                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3233                                 goto out_unlock;
3234
3235                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3236
3237                         /* Bind the P2P_DEVICE to the current PHY Context */
3238                         mvmvif->phy_ctxt = phy_ctxt;
3239
3240                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3241                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3242                                 goto out_unlock;
3243
3244                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3245                         goto schedule_time_event;
3246                 }
3247         }
3248
3249         /* Need to update the PHY context only if the ROC channel changed */
3250         if (channel == mvmvif->phy_ctxt->channel)
3251                 goto schedule_time_event;
3252
3253         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3254
3255         /*
3256          * Change the PHY context configuration as it is currently referenced
3257          * only by the P2P Device MAC
3258          */
3259         if (mvmvif->phy_ctxt->ref == 1) {
3260                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3261                                                &chandef, 1, 1);
3262                 if (ret)
3263                         goto out_unlock;
3264         } else {
3265                 /*
3266                  * The PHY context is shared with other MACs. Need to remove the
3267                  * P2P Device from the binding, allocate an new PHY context and
3268                  * create a new binding
3269                  */
3270                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3271                 if (!phy_ctxt) {
3272                         ret = -ENOSPC;
3273                         goto out_unlock;
3274                 }
3275
3276                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3277                                                1, 1);
3278                 if (ret) {
3279                         IWL_ERR(mvm, "Failed to change PHY context\n");
3280                         goto out_unlock;
3281                 }
3282
3283                 /* Unbind the P2P_DEVICE from the current PHY context */
3284                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3285                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3286                         goto out_unlock;
3287
3288                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3289
3290                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3291                 mvmvif->phy_ctxt = phy_ctxt;
3292
3293                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3294                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3295                         goto out_unlock;
3296
3297                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3298         }
3299
3300 schedule_time_event:
3301         /* Schedule the time events */
3302         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3303
3304 out_unlock:
3305         mutex_unlock(&mvm->mutex);
3306         IWL_DEBUG_MAC80211(mvm, "leave\n");
3307         return ret;
3308 }
3309
3310 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3311 {
3312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3313
3314         IWL_DEBUG_MAC80211(mvm, "enter\n");
3315
3316         mutex_lock(&mvm->mutex);
3317         iwl_mvm_stop_roc(mvm);
3318         mutex_unlock(&mvm->mutex);
3319
3320         IWL_DEBUG_MAC80211(mvm, "leave\n");
3321         return 0;
3322 }
3323
3324 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3325                                  struct ieee80211_chanctx_conf *ctx)
3326 {
3327         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3328         struct iwl_mvm_phy_ctxt *phy_ctxt;
3329         int ret;
3330
3331         lockdep_assert_held(&mvm->mutex);
3332
3333         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3334
3335         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3336         if (!phy_ctxt) {
3337                 ret = -ENOSPC;
3338                 goto out;
3339         }
3340
3341         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3342                                        ctx->rx_chains_static,
3343                                        ctx->rx_chains_dynamic);
3344         if (ret) {
3345                 IWL_ERR(mvm, "Failed to add PHY context\n");
3346                 goto out;
3347         }
3348
3349         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3350         *phy_ctxt_id = phy_ctxt->id;
3351 out:
3352         return ret;
3353 }
3354
3355 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3356                                struct ieee80211_chanctx_conf *ctx)
3357 {
3358         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3359         int ret;
3360
3361         mutex_lock(&mvm->mutex);
3362         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3363         mutex_unlock(&mvm->mutex);
3364
3365         return ret;
3366 }
3367
3368 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3369                                      struct ieee80211_chanctx_conf *ctx)
3370 {
3371         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3372         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3373
3374         lockdep_assert_held(&mvm->mutex);
3375
3376         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3377 }
3378
3379 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3380                                    struct ieee80211_chanctx_conf *ctx)
3381 {
3382         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3383
3384         mutex_lock(&mvm->mutex);
3385         __iwl_mvm_remove_chanctx(mvm, ctx);
3386         mutex_unlock(&mvm->mutex);
3387 }
3388
3389 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3390                                    struct ieee80211_chanctx_conf *ctx,
3391                                    u32 changed)
3392 {
3393         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3394         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3395         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3396
3397         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3398                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3399                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3400                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3401                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3402                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3403                       phy_ctxt->ref, changed))
3404                 return;
3405
3406         mutex_lock(&mvm->mutex);
3407         iwl_mvm_bt_coex_vif_change(mvm);
3408         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3409                                  ctx->rx_chains_static,
3410                                  ctx->rx_chains_dynamic);
3411         mutex_unlock(&mvm->mutex);
3412 }
3413
3414 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3415                                         struct ieee80211_vif *vif,
3416                                         struct ieee80211_chanctx_conf *ctx,
3417                                         bool switching_chanctx)
3418 {
3419         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3420         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3421         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3422         int ret;
3423
3424         lockdep_assert_held(&mvm->mutex);
3425
3426         mvmvif->phy_ctxt = phy_ctxt;
3427
3428         switch (vif->type) {
3429         case NL80211_IFTYPE_AP:
3430                 /* only needed if we're switching chanctx (i.e. during CSA) */
3431                 if (switching_chanctx) {
3432                         mvmvif->ap_ibss_active = true;
3433                         break;
3434                 }
3435         case NL80211_IFTYPE_ADHOC:
3436                 /*
3437                  * The AP binding flow is handled as part of the start_ap flow
3438                  * (in bss_info_changed), similarly for IBSS.
3439                  */
3440                 ret = 0;
3441                 goto out;
3442         case NL80211_IFTYPE_STATION:
3443                 break;
3444         case NL80211_IFTYPE_MONITOR:
3445                 /* always disable PS when a monitor interface is active */
3446                 mvmvif->ps_disabled = true;
3447                 break;
3448         default:
3449                 ret = -EINVAL;
3450                 goto out;
3451         }
3452
3453         ret = iwl_mvm_binding_add_vif(mvm, vif);
3454         if (ret)
3455                 goto out;
3456
3457         /*
3458          * Power state must be updated before quotas,
3459          * otherwise fw will complain.
3460          */
3461         iwl_mvm_power_update_mac(mvm);
3462
3463         /* Setting the quota at this stage is only required for monitor
3464          * interfaces. For the other types, the bss_info changed flow
3465          * will handle quota settings.
3466          */
3467         if (vif->type == NL80211_IFTYPE_MONITOR) {
3468                 mvmvif->monitor_active = true;
3469                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3470                 if (ret)
3471                         goto out_remove_binding;
3472         }
3473
3474         /* Handle binding during CSA */
3475         if (vif->type == NL80211_IFTYPE_AP) {
3476                 iwl_mvm_update_quotas(mvm, false, NULL);
3477                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3478         }
3479
3480         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3481                 u32 duration = 2 * vif->bss_conf.beacon_int;
3482
3483                 /* iwl_mvm_protect_session() reads directly from the
3484                  * device (the system time), so make sure it is
3485                  * available.
3486                  */
3487                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3488                 if (ret)
3489                         goto out_remove_binding;
3490
3491                 /* Protect the session to make sure we hear the first
3492                  * beacon on the new channel.
3493                  */
3494                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3495                                         vif->bss_conf.beacon_int / 2,
3496                                         true);
3497
3498                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3499
3500                 iwl_mvm_update_quotas(mvm, false, NULL);
3501         }
3502
3503         goto out;
3504
3505 out_remove_binding:
3506         iwl_mvm_binding_remove_vif(mvm, vif);
3507         iwl_mvm_power_update_mac(mvm);
3508 out:
3509         if (ret)
3510                 mvmvif->phy_ctxt = NULL;
3511         return ret;
3512 }
3513 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3514                                       struct ieee80211_vif *vif,
3515                                       struct ieee80211_chanctx_conf *ctx)
3516 {
3517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3518         int ret;
3519
3520         mutex_lock(&mvm->mutex);
3521         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3522         mutex_unlock(&mvm->mutex);
3523
3524         return ret;
3525 }
3526
3527 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3528                                            struct ieee80211_vif *vif,
3529                                            struct ieee80211_chanctx_conf *ctx,
3530                                            bool switching_chanctx)
3531 {
3532         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3533         struct ieee80211_vif *disabled_vif = NULL;
3534
3535         lockdep_assert_held(&mvm->mutex);
3536
3537         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3538
3539         switch (vif->type) {
3540         case NL80211_IFTYPE_ADHOC:
3541                 goto out;
3542         case NL80211_IFTYPE_MONITOR:
3543                 mvmvif->monitor_active = false;
3544                 mvmvif->ps_disabled = false;
3545                 break;
3546         case NL80211_IFTYPE_AP:
3547                 /* This part is triggered only during CSA */
3548                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3549                         goto out;
3550
3551                 mvmvif->csa_countdown = false;
3552
3553                 /* Set CS bit on all the stations */
3554                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3555
3556                 /* Save blocked iface, the timeout is set on the next beacon */
3557                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3558
3559                 mvmvif->ap_ibss_active = false;
3560                 break;
3561         case NL80211_IFTYPE_STATION:
3562                 if (!switching_chanctx)
3563                         break;
3564
3565                 disabled_vif = vif;
3566
3567                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3568                 break;
3569         default:
3570                 break;
3571         }
3572
3573         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3574         iwl_mvm_binding_remove_vif(mvm, vif);
3575
3576 out:
3577         mvmvif->phy_ctxt = NULL;
3578         iwl_mvm_power_update_mac(mvm);
3579 }
3580
3581 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3582                                          struct ieee80211_vif *vif,
3583                                          struct ieee80211_chanctx_conf *ctx)
3584 {
3585         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3586
3587         mutex_lock(&mvm->mutex);
3588         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3589         mutex_unlock(&mvm->mutex);
3590 }
3591
3592 static int
3593 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3594                                 struct ieee80211_vif_chanctx_switch *vifs)
3595 {
3596         int ret;
3597
3598         mutex_lock(&mvm->mutex);
3599         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3600         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3601
3602         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3603         if (ret) {
3604                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3605                 goto out_reassign;
3606         }
3607
3608         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3609                                            true);
3610         if (ret) {
3611                 IWL_ERR(mvm,
3612                         "failed to assign new_ctx during channel switch\n");
3613                 goto out_remove;
3614         }
3615
3616         /* we don't support TDLS during DCM - can be caused by channel switch */
3617         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3618                 iwl_mvm_teardown_tdls_peers(mvm);
3619
3620         goto out;
3621
3622 out_remove:
3623         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3624
3625 out_reassign:
3626         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3627                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3628                 goto out_restart;
3629         }
3630
3631         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3632                                          true)) {
3633                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3634                 goto out_restart;
3635         }
3636
3637         goto out;
3638
3639 out_restart:
3640         /* things keep failing, better restart the hw */
3641         iwl_mvm_nic_restart(mvm, false);
3642
3643 out:
3644         mutex_unlock(&mvm->mutex);
3645
3646         return ret;
3647 }
3648
3649 static int
3650 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3651                                     struct ieee80211_vif_chanctx_switch *vifs)
3652 {
3653         int ret;
3654
3655         mutex_lock(&mvm->mutex);
3656         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3657
3658         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3659                                            true);
3660         if (ret) {
3661                 IWL_ERR(mvm,
3662                         "failed to assign new_ctx during channel switch\n");
3663                 goto out_reassign;
3664         }
3665
3666         goto out;
3667
3668 out_reassign:
3669         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3670                                          true)) {
3671                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3672                 goto out_restart;
3673         }
3674
3675         goto out;
3676
3677 out_restart:
3678         /* things keep failing, better restart the hw */
3679         iwl_mvm_nic_restart(mvm, false);
3680
3681 out:
3682         mutex_unlock(&mvm->mutex);
3683
3684         return ret;
3685 }
3686
3687 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3688                                       struct ieee80211_vif_chanctx_switch *vifs,
3689                                       int n_vifs,
3690                                       enum ieee80211_chanctx_switch_mode mode)
3691 {
3692         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3693         int ret;
3694
3695         /* we only support a single-vif right now */
3696         if (n_vifs > 1)
3697                 return -EOPNOTSUPP;
3698
3699         switch (mode) {
3700         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3701                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3702                 break;
3703         case CHANCTX_SWMODE_REASSIGN_VIF:
3704                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3705                 break;
3706         default:
3707                 ret = -EOPNOTSUPP;
3708                 break;
3709         }
3710
3711         return ret;
3712 }
3713
3714 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3715                            struct ieee80211_sta *sta,
3716                            bool set)
3717 {
3718         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3719         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3720
3721         if (!mvm_sta || !mvm_sta->vif) {
3722                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3723                 return -EINVAL;
3724         }
3725
3726         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3727 }
3728
3729 #ifdef CONFIG_NL80211_TESTMODE
3730 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3731         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3732         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3733         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3734 };
3735
3736 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3737                                       struct ieee80211_vif *vif,
3738                                       void *data, int len)
3739 {
3740         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3741         int err;
3742         u32 noa_duration;
3743
3744         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3745         if (err)
3746                 return err;
3747
3748         if (!tb[IWL_MVM_TM_ATTR_CMD])
3749                 return -EINVAL;
3750
3751         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3752         case IWL_MVM_TM_CMD_SET_NOA:
3753                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3754                     !vif->bss_conf.enable_beacon ||
3755                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3756                         return -EINVAL;
3757
3758                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3759                 if (noa_duration >= vif->bss_conf.beacon_int)
3760                         return -EINVAL;
3761
3762                 mvm->noa_duration = noa_duration;
3763                 mvm->noa_vif = vif;
3764
3765                 return iwl_mvm_update_quotas(mvm, false, NULL);
3766         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3767                 /* must be associated client vif - ignore authorized */
3768                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3769                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3770                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3771                         return -EINVAL;
3772
3773                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3774                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3775                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3776         }
3777
3778         return -EOPNOTSUPP;
3779 }
3780
3781 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3782                                     struct ieee80211_vif *vif,
3783                                     void *data, int len)
3784 {
3785         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3786         int err;
3787
3788         mutex_lock(&mvm->mutex);
3789         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3790         mutex_unlock(&mvm->mutex);
3791
3792         return err;
3793 }
3794 #endif
3795
3796 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3797                                    struct ieee80211_vif *vif,
3798                                    struct ieee80211_channel_switch *chsw)
3799 {
3800         /* By implementing this operation, we prevent mac80211 from
3801          * starting its own channel switch timer, so that we can call
3802          * ieee80211_chswitch_done() ourselves at the right time
3803          * (which is when the absence time event starts).
3804          */
3805
3806         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3807                            "dummy channel switch op\n");
3808 }
3809
3810 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3811                                       struct ieee80211_vif *vif,
3812                                       struct ieee80211_channel_switch *chsw)
3813 {
3814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3815         struct ieee80211_vif *csa_vif;
3816         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3817         u32 apply_time;
3818         int ret;
3819
3820         mutex_lock(&mvm->mutex);
3821
3822         mvmvif->csa_failed = false;
3823
3824         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3825                            chsw->chandef.center_freq1);
3826
3827         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3828
3829         switch (vif->type) {
3830         case NL80211_IFTYPE_AP:
3831                 csa_vif =
3832                         rcu_dereference_protected(mvm->csa_vif,
3833                                                   lockdep_is_held(&mvm->mutex));
3834                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3835                               "Another CSA is already in progress")) {
3836                         ret = -EBUSY;
3837                         goto out_unlock;
3838                 }
3839
3840                 rcu_assign_pointer(mvm->csa_vif, vif);
3841
3842                 if (WARN_ONCE(mvmvif->csa_countdown,
3843                               "Previous CSA countdown didn't complete")) {
3844                         ret = -EBUSY;
3845                         goto out_unlock;
3846                 }
3847
3848                 break;
3849         case NL80211_IFTYPE_STATION:
3850                 /* Schedule the time event to a bit before beacon 1,
3851                  * to make sure we're in the new channel when the
3852                  * GO/AP arrives.
3853                  */
3854                 apply_time = chsw->device_timestamp +
3855                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3856                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3857
3858                 if (chsw->block_tx)
3859                         iwl_mvm_csa_client_absent(mvm, vif);
3860
3861                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3862                                             apply_time);
3863                 if (mvmvif->bf_data.bf_enabled) {
3864                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3865                         if (ret)
3866                                 goto out_unlock;
3867                 }
3868
3869                 break;
3870         default:
3871                 break;
3872         }
3873
3874         mvmvif->ps_disabled = true;
3875
3876         ret = iwl_mvm_power_update_ps(mvm);
3877         if (ret)
3878                 goto out_unlock;
3879
3880         /* we won't be on this channel any longer */
3881         iwl_mvm_teardown_tdls_peers(mvm);
3882
3883 out_unlock:
3884         mutex_unlock(&mvm->mutex);
3885
3886         return ret;
3887 }
3888
3889 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3890                                        struct ieee80211_vif *vif)
3891 {
3892         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3893         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3894         int ret;
3895
3896         mutex_lock(&mvm->mutex);
3897
3898         if (mvmvif->csa_failed) {
3899                 mvmvif->csa_failed = false;
3900                 ret = -EIO;
3901                 goto out_unlock;
3902         }
3903
3904         if (vif->type == NL80211_IFTYPE_STATION) {
3905                 struct iwl_mvm_sta *mvmsta;
3906
3907                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3908                                                           mvmvif->ap_sta_id);
3909
3910                 if (WARN_ON(!mvmsta)) {
3911                         ret = -EIO;
3912                         goto out_unlock;
3913                 }
3914
3915                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3916
3917                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3918
3919                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3920                 if (ret)
3921                         goto out_unlock;
3922
3923                 iwl_mvm_stop_session_protection(mvm, vif);
3924         }
3925
3926         mvmvif->ps_disabled = false;
3927
3928         ret = iwl_mvm_power_update_ps(mvm);
3929
3930 out_unlock:
3931         mutex_unlock(&mvm->mutex);
3932
3933         return ret;
3934 }
3935
3936 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3937                               struct ieee80211_vif *vif, u32 queues, bool drop)
3938 {
3939         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3940         struct iwl_mvm_vif *mvmvif;
3941         struct iwl_mvm_sta *mvmsta;
3942         struct ieee80211_sta *sta;
3943         int i;
3944         u32 msk = 0;
3945
3946         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3947                 return;
3948
3949         mutex_lock(&mvm->mutex);
3950         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3951
3952         /* flush the AP-station and all TDLS peers */
3953         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3954                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3955                                                 lockdep_is_held(&mvm->mutex));
3956                 if (IS_ERR_OR_NULL(sta))
3957                         continue;
3958
3959                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3960                 if (mvmsta->vif != vif)
3961                         continue;
3962
3963                 /* make sure only TDLS peers or the AP are flushed */
3964                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3965
3966                 msk |= mvmsta->tfd_queue_msk;
3967         }
3968
3969         if (drop) {
3970                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3971                         IWL_ERR(mvm, "flush request fail\n");
3972                 mutex_unlock(&mvm->mutex);
3973         } else {
3974                 mutex_unlock(&mvm->mutex);
3975
3976                 /* this can take a while, and we may need/want other operations
3977                  * to succeed while doing this, so do it without the mutex held
3978                  */
3979                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3980         }
3981 }
3982
3983 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3984                                   struct survey_info *survey)
3985 {
3986         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3987         int ret;
3988
3989         memset(survey, 0, sizeof(*survey));
3990
3991         /* only support global statistics right now */
3992         if (idx != 0)
3993                 return -ENOENT;
3994
3995         if (!fw_has_capa(&mvm->fw->ucode_capa,
3996                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3997                 return -ENOENT;
3998
3999         mutex_lock(&mvm->mutex);
4000
4001         if (mvm->ucode_loaded) {
4002                 ret = iwl_mvm_request_statistics(mvm, false);
4003                 if (ret)
4004                         goto out;
4005         }
4006
4007         survey->filled = SURVEY_INFO_TIME |
4008                          SURVEY_INFO_TIME_RX |
4009                          SURVEY_INFO_TIME_TX |
4010                          SURVEY_INFO_TIME_SCAN;
4011         survey->time = mvm->accu_radio_stats.on_time_rf +
4012                        mvm->radio_stats.on_time_rf;
4013         do_div(survey->time, USEC_PER_MSEC);
4014
4015         survey->time_rx = mvm->accu_radio_stats.rx_time +
4016                           mvm->radio_stats.rx_time;
4017         do_div(survey->time_rx, USEC_PER_MSEC);
4018
4019         survey->time_tx = mvm->accu_radio_stats.tx_time +
4020                           mvm->radio_stats.tx_time;
4021         do_div(survey->time_tx, USEC_PER_MSEC);
4022
4023         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
4024                             mvm->radio_stats.on_time_scan;
4025         do_div(survey->time_scan, USEC_PER_MSEC);
4026
4027         ret = 0;
4028  out:
4029         mutex_unlock(&mvm->mutex);
4030         return ret;
4031 }
4032
4033 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
4034                                        struct ieee80211_vif *vif,
4035                                        struct ieee80211_sta *sta,
4036                                        struct station_info *sinfo)
4037 {
4038         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4039         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4040         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4041
4042         if (!fw_has_capa(&mvm->fw->ucode_capa,
4043                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4044                 return;
4045
4046         /* if beacon filtering isn't on mac80211 does it anyway */
4047         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4048                 return;
4049
4050         if (!vif->bss_conf.assoc)
4051                 return;
4052
4053         mutex_lock(&mvm->mutex);
4054
4055         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4056                 goto unlock;
4057
4058         if (iwl_mvm_request_statistics(mvm, false))
4059                 goto unlock;
4060
4061         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4062                            mvmvif->beacon_stats.accu_num_beacons;
4063         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4064         if (mvmvif->beacon_stats.avg_signal) {
4065                 /* firmware only reports a value after RXing a few beacons */
4066                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4067                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4068         }
4069  unlock:
4070         mutex_unlock(&mvm->mutex);
4071 }
4072
4073 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4074                                         struct ieee80211_vif *vif,
4075                                         const struct ieee80211_event *event)
4076 {
4077 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4078         do {                                                    \
4079                 if ((_cnt) && --(_cnt))                         \
4080                         break;                                  \
4081                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4082         } while (0)
4083
4084         struct iwl_fw_dbg_trigger_tlv *trig;
4085         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4086
4087         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4088                 return;
4089
4090         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4091         trig_mlme = (void *)trig->data;
4092         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4093                 return;
4094
4095         if (event->u.mlme.data == ASSOC_EVENT) {
4096                 if (event->u.mlme.status == MLME_DENIED)
4097                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4098                                            trig_mlme->stop_assoc_denied,
4099                                            "DENIED ASSOC: reason %d",
4100                                             event->u.mlme.reason);
4101                 else if (event->u.mlme.status == MLME_TIMEOUT)
4102                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4103                                            trig_mlme->stop_assoc_timeout,
4104                                            "ASSOC TIMEOUT");
4105         } else if (event->u.mlme.data == AUTH_EVENT) {
4106                 if (event->u.mlme.status == MLME_DENIED)
4107                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4108                                            trig_mlme->stop_auth_denied,
4109                                            "DENIED AUTH: reason %d",
4110                                            event->u.mlme.reason);
4111                 else if (event->u.mlme.status == MLME_TIMEOUT)
4112                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4113                                            trig_mlme->stop_auth_timeout,
4114                                            "AUTH TIMEOUT");
4115         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4116                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4117                                    trig_mlme->stop_rx_deauth,
4118                                    "DEAUTH RX %d", event->u.mlme.reason);
4119         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4120                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4121                                    trig_mlme->stop_tx_deauth,
4122                                    "DEAUTH TX %d", event->u.mlme.reason);
4123         }
4124 #undef CHECK_MLME_TRIGGER
4125 }
4126
4127 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4128                                           struct ieee80211_vif *vif,
4129                                           const struct ieee80211_event *event)
4130 {
4131         struct iwl_fw_dbg_trigger_tlv *trig;
4132         struct iwl_fw_dbg_trigger_ba *ba_trig;
4133
4134         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4135                 return;
4136
4137         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4138         ba_trig = (void *)trig->data;
4139         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4140                 return;
4141
4142         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4143                 return;
4144
4145         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4146                                     "BAR received from %pM, tid %d, ssn %d",
4147                                     event->u.ba.sta->addr, event->u.ba.tid,
4148                                     event->u.ba.ssn);
4149 }
4150
4151 static void
4152 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4153                                      struct ieee80211_vif *vif,
4154                                      const struct ieee80211_event *event)
4155 {
4156         struct iwl_fw_dbg_trigger_tlv *trig;
4157         struct iwl_fw_dbg_trigger_ba *ba_trig;
4158
4159         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4160                 return;
4161
4162         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4163         ba_trig = (void *)trig->data;
4164         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4165                 return;
4166
4167         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4168                 return;
4169
4170         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4171                                     "Frame from %pM timed out, tid %d",
4172                                     event->u.ba.sta->addr, event->u.ba.tid);
4173 }
4174
4175 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4176                                        struct ieee80211_vif *vif,
4177                                        const struct ieee80211_event *event)
4178 {
4179         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4180
4181         switch (event->type) {
4182         case MLME_EVENT:
4183                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4184                 break;
4185         case BAR_RX_EVENT:
4186                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4187                 break;
4188         case BA_FRAME_TIMEOUT:
4189                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4190                 break;
4191         default:
4192                 break;
4193         }
4194 }
4195
4196 const struct ieee80211_ops iwl_mvm_hw_ops = {
4197         .tx = iwl_mvm_mac_tx,
4198         .ampdu_action = iwl_mvm_mac_ampdu_action,
4199         .start = iwl_mvm_mac_start,
4200         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4201         .stop = iwl_mvm_mac_stop,
4202         .add_interface = iwl_mvm_mac_add_interface,
4203         .remove_interface = iwl_mvm_mac_remove_interface,
4204         .config = iwl_mvm_mac_config,
4205         .prepare_multicast = iwl_mvm_prepare_multicast,
4206         .configure_filter = iwl_mvm_configure_filter,
4207         .config_iface_filter = iwl_mvm_config_iface_filter,
4208         .bss_info_changed = iwl_mvm_bss_info_changed,
4209         .hw_scan = iwl_mvm_mac_hw_scan,
4210         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4211         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4212         .sta_state = iwl_mvm_mac_sta_state,
4213         .sta_notify = iwl_mvm_mac_sta_notify,
4214         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4215         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4216         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4217         .sta_rc_update = iwl_mvm_sta_rc_update,
4218         .conf_tx = iwl_mvm_mac_conf_tx,
4219         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4220         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4221         .flush = iwl_mvm_mac_flush,
4222         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4223         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4224         .set_key = iwl_mvm_mac_set_key,
4225         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4226         .remain_on_channel = iwl_mvm_roc,
4227         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4228         .add_chanctx = iwl_mvm_add_chanctx,
4229         .remove_chanctx = iwl_mvm_remove_chanctx,
4230         .change_chanctx = iwl_mvm_change_chanctx,
4231         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4232         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4233         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4234
4235         .start_ap = iwl_mvm_start_ap_ibss,
4236         .stop_ap = iwl_mvm_stop_ap_ibss,
4237         .join_ibss = iwl_mvm_start_ap_ibss,
4238         .leave_ibss = iwl_mvm_stop_ap_ibss,
4239
4240         .set_tim = iwl_mvm_set_tim,
4241
4242         .channel_switch = iwl_mvm_channel_switch,
4243         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4244         .post_channel_switch = iwl_mvm_post_channel_switch,
4245
4246         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4247         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4248         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4249
4250         .event_callback = iwl_mvm_mac_event_callback,
4251
4252         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4253
4254 #ifdef CONFIG_PM_SLEEP
4255         /* look at d3.c */
4256         .suspend = iwl_mvm_suspend,
4257         .resume = iwl_mvm_resume,
4258         .set_wakeup = iwl_mvm_set_wakeup,
4259         .set_rekey_data = iwl_mvm_set_rekey_data,
4260 #if IS_ENABLED(CONFIG_IPV6)
4261         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4262 #endif
4263         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4264 #endif
4265         .get_survey = iwl_mvm_mac_get_survey,
4266         .sta_statistics = iwl_mvm_mac_sta_statistics,
4267 };