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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "fw-api-scan.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-csr.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 = 1,
 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 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 305 {
 306         struct ieee80211_hw *hw = mvm->hw;
 307         int num_mac, ret, i;
 308
 309         /* Tell mac80211 our characteristics */
 310         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 311                     IEEE80211_HW_SPECTRUM_MGMT |
 312                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 313                     IEEE80211_HW_QUEUE_CONTROL |
 314                     IEEE80211_HW_WANT_MONITOR_VIF |
 315                     IEEE80211_HW_SUPPORTS_PS |
 316                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 317                     IEEE80211_HW_AMPDU_AGGREGATION |
 318                     IEEE80211_HW_TIMING_BEACON_ONLY |
 319                     IEEE80211_HW_CONNECTION_MONITOR |
 320                     IEEE80211_HW_CHANCTX_STA_CSA |
 321                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 322
 323         hw->queues = mvm->first_agg_queue;
 324         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 325         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 326                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 327         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 328                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 329         hw->rate_control_algorithm = "iwl-mvm-rs";
 330
 331         /*
 332          * Enable 11w if advertised by firmware and software crypto
 333          * is not enabled (as the firmware will interpret some mgmt
 334          * packets, so enabling it with software crypto isn't safe)
 335          */
 336         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 337             !iwlwifi_mod_params.sw_crypto)
 338                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 339
 340         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 341             !iwlwifi_mod_params.uapsd_disable) {
 342                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 343                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 344                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 345         }
 346
 347         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 348             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
 349                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 350                 hw->wiphy->features |=
 351                         NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 352                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 353         }
 354
 355         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 356         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 357         hw->chanctx_data_size = sizeof(u16);
 358
 359         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 360                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 361                 BIT(NL80211_IFTYPE_AP) |
 362                 BIT(NL80211_IFTYPE_P2P_GO) |
 363                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 364                 BIT(NL80211_IFTYPE_ADHOC);
 365
 366         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 367         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 368                                        REGULATORY_DISABLE_BEACON_HINTS;
 369
 370         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 371                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 372
 373         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 374
 375         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 376         hw->wiphy->n_iface_combinations =
 377                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 378
 379         hw->wiphy->max_remain_on_channel_duration = 10000;
 380         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 381         /* we can compensate an offset of up to 3 channels = 15 MHz */
 382         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 383
 384         /* Extract MAC address */
 385         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 386         hw->wiphy->addresses = mvm->addresses;
 387         hw->wiphy->n_addresses = 1;
 388
 389         /* Extract additional MAC addresses if available */
 390         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 391                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 392
 393         for (i = 1; i < num_mac; i++) {
 394                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 395                        ETH_ALEN);
 396                 mvm->addresses[i].addr[5]++;
 397                 hw->wiphy->n_addresses++;
 398         }
 399
 400         iwl_mvm_reset_phy_ctxts(mvm);
 401
 402         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 403
 404         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 405
 406         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 407                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 408                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 409         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 410                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 411                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 412
 413         hw->wiphy->hw_version = mvm->trans->hw_id;
 414
 415         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 416                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 417         else
 418                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 419
 420         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 421                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 422                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 423                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 424                 /* we create the 802.11 header and zero length SSID IE. */
 425                 hw->wiphy->max_sched_scan_ie_len =
 426                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 427         }
 428
 429         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 430                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 431                                NL80211_FEATURE_P2P_GO_OPPPS |
 432                                NL80211_FEATURE_DYNAMIC_SMPS |
 433                                NL80211_FEATURE_STATIC_SMPS |
 434                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 435
 436         if (mvm->fw->ucode_capa.capa[0] &
 437             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 438                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 439         if (mvm->fw->ucode_capa.capa[0] &
 440             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 441                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 442
 443         if (mvm->fw->ucode_capa.capa[0] &
 444             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 445                 hw->wiphy->features |=
 446                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 447
 448         if (mvm->fw->ucode_capa.capa[0] &
 449             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 450                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 451
 452         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 453
 454         /* currently FW API supports only one optional cipher scheme */
 455         if (mvm->fw->cs[0].cipher) {
 456                 mvm->hw->n_cipher_schemes = 1;
 457                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 458         }
 459
 460 #ifdef CONFIG_PM_SLEEP
 461         if (iwl_mvm_is_d0i3_supported(mvm) &&
 462             device_can_wakeup(mvm->trans->dev)) {
 463                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 464                 hw->wiphy->wowlan = &mvm->wowlan;
 465         }
 466
 467         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 468             mvm->trans->ops->d3_suspend &&
 469             mvm->trans->ops->d3_resume &&
 470             device_can_wakeup(mvm->trans->dev)) {
 471                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 472                                      WIPHY_WOWLAN_DISCONNECT |
 473                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 474                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 475                                      WIPHY_WOWLAN_NET_DETECT;
 476                 if (!iwlwifi_mod_params.sw_crypto)
 477                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 478                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 479                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 480
 481                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 482                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 483                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 484                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 485                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 486                 hw->wiphy->wowlan = &mvm->wowlan;
 487         }
 488 #endif
 489
 490 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 491         /* assign default bcast filtering configuration */
 492         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 493 #endif
 494
 495         ret = iwl_mvm_leds_init(mvm);
 496         if (ret)
 497                 return ret;
 498
 499         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 500                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 501                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 502         }
 503
 504         if (mvm->fw->ucode_capa.capa[0] &
 505             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
 506                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 507                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 508         }
 509
 510         ret = ieee80211_register_hw(mvm->hw);
 511         if (ret)
 512                 iwl_mvm_leds_exit(mvm);
 513
 514         return ret;
 515 }
 516
 517 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 518                              struct ieee80211_sta *sta,
 519                              struct sk_buff *skb)
 520 {
 521         struct iwl_mvm_sta *mvmsta;
 522         bool defer = false;
 523
 524         /*
 525          * double check the IN_D0I3 flag both before and after
 526          * taking the spinlock, in order to prevent taking
 527          * the spinlock when not needed.
 528          */
 529         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 530                 return false;
 531
 532         spin_lock(&mvm->d0i3_tx_lock);
 533         /*
 534          * testing the flag again ensures the skb dequeue
 535          * loop (on d0i3 exit) hasn't run yet.
 536          */
 537         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 538                 goto out;
 539
 540         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 541         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 542             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 543                 goto out;
 544
 545         __skb_queue_tail(&mvm->d0i3_tx, skb);
 546         ieee80211_stop_queues(mvm->hw);
 547
 548         /* trigger wakeup */
 549         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 550         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 551
 552         defer = true;
 553 out:
 554         spin_unlock(&mvm->d0i3_tx_lock);
 555         return defer;
 556 }
 557
 558 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 559                            struct ieee80211_tx_control *control,
 560                            struct sk_buff *skb)
 561 {
 562         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 563         struct ieee80211_sta *sta = control->sta;
 564         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 565         struct ieee80211_hdr *hdr = (void *)skb->data;
 566
 567         if (iwl_mvm_is_radio_killed(mvm)) {
 568                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 569                 goto drop;
 570         }
 571
 572         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 573             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 574             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 575                 goto drop;
 576
 577         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 578         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 579                      ieee80211_is_mgmt(hdr->frame_control) &&
 580                      !ieee80211_is_deauth(hdr->frame_control) &&
 581                      !ieee80211_is_disassoc(hdr->frame_control) &&
 582                      !ieee80211_is_action(hdr->frame_control)))
 583                 sta = NULL;
 584
 585         if (sta) {
 586                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 587                         return;
 588                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 589                         goto drop;
 590                 return;
 591         }
 592
 593         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 594                 goto drop;
 595         return;
 596  drop:
 597         ieee80211_free_txskb(hw, skb);
 598 }
 599
 600 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 601 {
 602         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 603                 return false;
 604         return true;
 605 }
 606
 607 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 608 {
 609         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 610                 return false;
 611         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 612                 return true;
 613
 614         /* enabled by default */
 615         return true;
 616 }
 617
 618 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 619                                     struct ieee80211_vif *vif,
 620                                     enum ieee80211_ampdu_mlme_action action,
 621                                     struct ieee80211_sta *sta, u16 tid,
 622                                     u16 *ssn, u8 buf_size)
 623 {
 624         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 625         int ret;
 626         bool tx_agg_ref = false;
 627
 628         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 629                      sta->addr, tid, action);
 630
 631         if (!(mvm->nvm_data->sku_cap_11n_enable))
 632                 return -EACCES;
 633
 634         /* return from D0i3 before starting a new Tx aggregation */
 635         switch (action) {
 636         case IEEE80211_AMPDU_TX_START:
 637         case IEEE80211_AMPDU_TX_STOP_CONT:
 638         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 639         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 640         case IEEE80211_AMPDU_TX_OPERATIONAL:
 641                 /*
 642                  * for tx start, wait synchronously until D0i3 exit to
 643                  * get the correct sequence number for the tid.
 644                  * additionally, some other ampdu actions use direct
 645                  * target access, which is not handled automatically
 646                  * by the trans layer (unlike commands), so wait for
 647                  * d0i3 exit in these cases as well.
 648                  */
 649                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 650                 if (ret)
 651                         return ret;
 652
 653                 tx_agg_ref = true;
 654                 break;
 655         default:
 656                 break;
 657         }
 658
 659         mutex_lock(&mvm->mutex);
 660
 661         switch (action) {
 662         case IEEE80211_AMPDU_RX_START:
 663                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 664                         ret = -EINVAL;
 665                         break;
 666                 }
 667                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 668                 break;
 669         case IEEE80211_AMPDU_RX_STOP:
 670                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 671                 break;
 672         case IEEE80211_AMPDU_TX_START:
 673                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 674                         ret = -EINVAL;
 675                         break;
 676                 }
 677                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 678                 break;
 679         case IEEE80211_AMPDU_TX_STOP_CONT:
 680                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 681                 break;
 682         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 683         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 684                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 685                 break;
 686         case IEEE80211_AMPDU_TX_OPERATIONAL:
 687                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 688                 break;
 689         default:
 690                 WARN_ON_ONCE(1);
 691                 ret = -EINVAL;
 692                 break;
 693         }
 694         mutex_unlock(&mvm->mutex);
 695
 696         /*
 697          * If the tid is marked as started, we won't use it for offloaded
 698          * traffic on the next D0i3 entry. It's safe to unref.
 699          */
 700         if (tx_agg_ref)
 701                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 702
 703         return ret;
 704 }
 705
 706 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 707                                      struct ieee80211_vif *vif)
 708 {
 709         struct iwl_mvm *mvm = data;
 710         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 711
 712         mvmvif->uploaded = false;
 713         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 714
 715         /* does this make sense at all? */
 716         mvmvif->color++;
 717
 718         spin_lock_bh(&mvm->time_event_lock);
 719         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 720         spin_unlock_bh(&mvm->time_event_lock);
 721
 722         mvmvif->phy_ctxt = NULL;
 723         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 724 }
 725
 726 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 727                                      const void *data, size_t datalen)
 728 {
 729         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 730         ssize_t bytes_read;
 731         ssize_t bytes_read_trans;
 732
 733         if (offset < dump_ptrs->op_mode_len) {
 734                 bytes_read = min_t(ssize_t, count,
 735                                    dump_ptrs->op_mode_len - offset);
 736                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 737                        bytes_read);
 738                 offset += bytes_read;
 739                 count -= bytes_read;
 740
 741                 if (count == 0)
 742                         return bytes_read;
 743         } else {
 744                 bytes_read = 0;
 745         }
 746
 747         if (!dump_ptrs->trans_ptr)
 748                 return bytes_read;
 749
 750         offset -= dump_ptrs->op_mode_len;
 751         bytes_read_trans = min_t(ssize_t, count,
 752                                  dump_ptrs->trans_ptr->len - offset);
 753         memcpy(buffer + bytes_read,
 754                (u8 *)dump_ptrs->trans_ptr->data + offset,
 755                bytes_read_trans);
 756
 757         return bytes_read + bytes_read_trans;
 758 }
 759
 760 static void iwl_mvm_free_coredump(const void *data)
 761 {
 762         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 763
 764         vfree(fw_error_dump->op_mode_ptr);
 765         vfree(fw_error_dump->trans_ptr);
 766         kfree(fw_error_dump);
 767 }
 768
 769 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 770 {
 771         struct iwl_fw_error_dump_file *dump_file;
 772         struct iwl_fw_error_dump_data *dump_data;
 773         struct iwl_fw_error_dump_info *dump_info;
 774         struct iwl_fw_error_dump_mem *dump_mem;
 775         struct iwl_mvm_dump_ptrs *fw_error_dump;
 776         u32 sram_len, sram_ofs;
 777         u32 file_len, rxf_len;
 778         unsigned long flags;
 779         int reg_val;
 780         u32 smem_len = mvm->cfg->smem_len;
 781
 782         lockdep_assert_held(&mvm->mutex);
 783
 784         /* W/A for 8000 HW family A-step */
 785         if (mvm->cfg->smem_len &&
 786             mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
 787             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP)
 788                 smem_len = 0x38000;
 789
 790         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 791         if (!fw_error_dump)
 792                 return;
 793
 794         /* SRAM - include stack CCM if driver knows the values for it */
 795         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
 796                 const struct fw_img *img;
 797
 798                 img = &mvm->fw->img[mvm->cur_ucode];
 799                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 800                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 801         } else {
 802                 sram_ofs = mvm->cfg->dccm_offset;
 803                 sram_len = mvm->cfg->dccm_len;
 804         }
 805
 806         /* reading buffer size */
 807         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 808         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 809
 810         /* the register holds the value divided by 128 */
 811         rxf_len = rxf_len << 7;
 812
 813         file_len = sizeof(*dump_file) +
 814                    sizeof(*dump_data) * 3 +
 815                    sram_len + sizeof(*dump_mem) +
 816                    rxf_len +
 817                    sizeof(*dump_info);
 818
 819         /* Make room for the SMEM, if it exists */
 820         if (smem_len)
 821                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
 822
 823         dump_file = vzalloc(file_len);
 824         if (!dump_file) {
 825                 kfree(fw_error_dump);
 826                 return;
 827         }
 828
 829         fw_error_dump->op_mode_ptr = dump_file;
 830
 831         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 832         dump_data = (void *)dump_file->data;
 833
 834         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 835         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 836         dump_info = (void *) dump_data->data;
 837         dump_info->device_family =
 838                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 839                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 840                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 841         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
 842         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 843                sizeof(dump_info->fw_human_readable));
 844         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 845                 sizeof(dump_info->dev_human_readable));
 846         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 847                 sizeof(dump_info->bus_human_readable));
 848
 849         dump_data = iwl_fw_error_next_data(dump_data);
 850         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 851         dump_data->len = cpu_to_le32(rxf_len);
 852
 853         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 854                 u32 *rxf = (void *)dump_data->data;
 855                 int i;
 856
 857                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 858                         iwl_trans_write_prph(mvm->trans,
 859                                              RXF_LD_FENCE_OFFSET_ADDR,
 860                                              i * sizeof(u32));
 861                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 862                                                      RXF_FIFO_RD_FENCE_ADDR);
 863                 }
 864                 iwl_trans_release_nic_access(mvm->trans, &flags);
 865         }
 866
 867         dump_data = iwl_fw_error_next_data(dump_data);
 868         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
 869         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
 870         dump_mem = (void *)dump_data->data;
 871         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
 872         dump_mem->offset = cpu_to_le32(sram_ofs);
 873         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
 874                                  sram_len);
 875
 876         if (smem_len) {
 877                 dump_data = iwl_fw_error_next_data(dump_data);
 878                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
 879                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
 880                 dump_mem = (void *)dump_data->data;
 881                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
 882                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
 883                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
 884                                          dump_mem->data, smem_len);
 885         }
 886
 887         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 888         fw_error_dump->op_mode_len = file_len;
 889         if (fw_error_dump->trans_ptr)
 890                 file_len += fw_error_dump->trans_ptr->len;
 891         dump_file->file_len = cpu_to_le32(file_len);
 892
 893         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 894                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 895 }
 896
 897 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 898 {
 899         /* clear the D3 reconfig, we only need it to avoid dumping a
 900          * firmware coredump on reconfiguration, we shouldn't do that
 901          * on D3->D0 transition
 902          */
 903         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
 904                 iwl_mvm_fw_error_dump(mvm);
 905
 906         iwl_trans_stop_device(mvm->trans);
 907
 908         mvm->scan_status = IWL_MVM_SCAN_NONE;
 909         mvm->ps_disabled = false;
 910         mvm->calibrating = false;
 911
 912         /* just in case one was running */
 913         ieee80211_remain_on_channel_expired(mvm->hw);
 914
 915         ieee80211_iterate_active_interfaces_atomic(
 916                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 917                 iwl_mvm_cleanup_iterator, mvm);
 918
 919         mvm->p2p_device_vif = NULL;
 920         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 921
 922         iwl_mvm_reset_phy_ctxts(mvm);
 923         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 924         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 925         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
 926         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 927         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 928         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 929         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 930         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 931         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 932
 933         ieee80211_wake_queues(mvm->hw);
 934
 935         /* cleanup all stale references (scan, roc), but keep the
 936          * ucode_down ref until reconfig is complete */
 937         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 938
 939         /* clear any stale d0i3 state */
 940         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 941
 942         mvm->vif_count = 0;
 943         mvm->rx_ba_sessions = 0;
 944 }
 945
 946 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 947 {
 948         int ret;
 949
 950         lockdep_assert_held(&mvm->mutex);
 951
 952         /* Clean up some internal and mac80211 state on restart */
 953         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 954                 iwl_mvm_restart_cleanup(mvm);
 955
 956         ret = iwl_mvm_up(mvm);
 957
 958         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 959                 /* Something went wrong - we need to finish some cleanup
 960                  * that normally iwl_mvm_mac_restart_complete() below
 961                  * would do.
 962                  */
 963                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 964                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 965         }
 966
 967         return ret;
 968 }
 969
 970 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 971 {
 972         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 973         int ret;
 974
 975         mutex_lock(&mvm->mutex);
 976         ret = __iwl_mvm_mac_start(mvm);
 977         mutex_unlock(&mvm->mutex);
 978
 979         return ret;
 980 }
 981
 982 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 983 {
 984         int ret;
 985
 986         mutex_lock(&mvm->mutex);
 987
 988         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 989         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 990         ret = iwl_mvm_update_quotas(mvm, NULL);
 991         if (ret)
 992                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 993                         ret);
 994
 995         /* allow transport/FW low power modes */
 996         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 997
 998         /*
 999          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1000          * of packets the FW sent out, so we must reconnect.
1001          */
1002         iwl_mvm_teardown_tdls_peers(mvm);
1003
1004         mutex_unlock(&mvm->mutex);
1005 }
1006
1007 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1008 {
1009         bool exit_now;
1010
1011         if (!iwl_mvm_is_d0i3_supported(mvm))
1012                 return;
1013
1014         mutex_lock(&mvm->d0i3_suspend_mutex);
1015         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1016         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1017                                         &mvm->d0i3_suspend_flags);
1018         mutex_unlock(&mvm->d0i3_suspend_mutex);
1019
1020         if (exit_now) {
1021                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1022                 _iwl_mvm_exit_d0i3(mvm);
1023         }
1024 }
1025
1026 static void
1027 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1028                               enum ieee80211_reconfig_type reconfig_type)
1029 {
1030         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1031
1032         switch (reconfig_type) {
1033         case IEEE80211_RECONFIG_TYPE_RESTART:
1034                 iwl_mvm_restart_complete(mvm);
1035                 break;
1036         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1037                 iwl_mvm_resume_complete(mvm);
1038                 break;
1039         }
1040 }
1041
1042 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1043 {
1044         lockdep_assert_held(&mvm->mutex);
1045
1046         /* disallow low power states when the FW is down */
1047         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1048
1049         /* async_handlers_wk is now blocked */
1050
1051         /*
1052          * The work item could be running or queued if the
1053          * ROC time event stops just as we get here.
1054          */
1055         cancel_work_sync(&mvm->roc_done_wk);
1056
1057         iwl_trans_stop_device(mvm->trans);
1058
1059         iwl_mvm_async_handlers_purge(mvm);
1060         /* async_handlers_list is empty and will stay empty: HW is stopped */
1061
1062         /* the fw is stopped, the aux sta is dead: clean up driver state */
1063         iwl_mvm_del_aux_sta(mvm);
1064
1065         mvm->ucode_loaded = false;
1066 }
1067
1068 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1069 {
1070         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1071
1072         flush_work(&mvm->d0i3_exit_work);
1073         flush_work(&mvm->async_handlers_wk);
1074         flush_work(&mvm->fw_error_dump_wk);
1075
1076         mutex_lock(&mvm->mutex);
1077         __iwl_mvm_mac_stop(mvm);
1078         mutex_unlock(&mvm->mutex);
1079
1080         /*
1081          * The worker might have been waiting for the mutex, let it run and
1082          * discover that its list is now empty.
1083          */
1084         cancel_work_sync(&mvm->async_handlers_wk);
1085 }
1086
1087 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1088 {
1089         u16 i;
1090
1091         lockdep_assert_held(&mvm->mutex);
1092
1093         for (i = 0; i < NUM_PHY_CTX; i++)
1094                 if (!mvm->phy_ctxts[i].ref)
1095                         return &mvm->phy_ctxts[i];
1096
1097         IWL_ERR(mvm, "No available PHY context\n");
1098         return NULL;
1099 }
1100
1101 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1102                                 s8 tx_power)
1103 {
1104         /* FW is in charge of regulatory enforcement */
1105         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1106                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1107                 .pwr_restriction = cpu_to_le16(tx_power),
1108         };
1109
1110         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1111                                     sizeof(reduce_txpwr_cmd),
1112                                     &reduce_txpwr_cmd);
1113 }
1114
1115 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1116                                      struct ieee80211_vif *vif)
1117 {
1118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1119         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1120         int ret;
1121
1122         /*
1123          * make sure D0i3 exit is completed, otherwise a target access
1124          * during tx queue configuration could be done when still in
1125          * D0i3 state.
1126          */
1127         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1128         if (ret)
1129                 return ret;
1130
1131         /*
1132          * Not much to do here. The stack will not allow interface
1133          * types or combinations that we didn't advertise, so we
1134          * don't really have to check the types.
1135          */
1136
1137         mutex_lock(&mvm->mutex);
1138
1139         /* Allocate resources for the MAC context, and add it to the fw  */
1140         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1141         if (ret)
1142                 goto out_unlock;
1143
1144         /* Counting number of interfaces is needed for legacy PM */
1145         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1146                 mvm->vif_count++;
1147
1148         /*
1149          * The AP binding flow can be done only after the beacon
1150          * template is configured (which happens only in the mac80211
1151          * start_ap() flow), and adding the broadcast station can happen
1152          * only after the binding.
1153          * In addition, since modifying the MAC before adding a bcast
1154          * station is not allowed by the FW, delay the adding of MAC context to
1155          * the point where we can also add the bcast station.
1156          * In short: there's not much we can do at this point, other than
1157          * allocating resources :)
1158          */
1159         if (vif->type == NL80211_IFTYPE_AP ||
1160             vif->type == NL80211_IFTYPE_ADHOC) {
1161                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1162                 if (ret) {
1163                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1164                         goto out_release;
1165                 }
1166
1167                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1168                 goto out_unlock;
1169         }
1170
1171         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1172         if (ret)
1173                 goto out_release;
1174
1175         ret = iwl_mvm_power_update_mac(mvm);
1176         if (ret)
1177                 goto out_release;
1178
1179         /* beacon filtering */
1180         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1181         if (ret)
1182                 goto out_remove_mac;
1183
1184         if (!mvm->bf_allowed_vif &&
1185             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1186                 mvm->bf_allowed_vif = mvmvif;
1187                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1188                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1189         }
1190
1191         /*
1192          * P2P_DEVICE interface does not have a channel context assigned to it,
1193          * so a dedicated PHY context is allocated to it and the corresponding
1194          * MAC context is bound to it at this stage.
1195          */
1196         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1197
1198                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1199                 if (!mvmvif->phy_ctxt) {
1200                         ret = -ENOSPC;
1201                         goto out_free_bf;
1202                 }
1203
1204                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1205                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1206                 if (ret)
1207                         goto out_unref_phy;
1208
1209                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1210                 if (ret)
1211                         goto out_unbind;
1212
1213                 /* Save a pointer to p2p device vif, so it can later be used to
1214                  * update the p2p device MAC when a GO is started/stopped */
1215                 mvm->p2p_device_vif = vif;
1216         }
1217
1218         iwl_mvm_vif_dbgfs_register(mvm, vif);
1219         goto out_unlock;
1220
1221  out_unbind:
1222         iwl_mvm_binding_remove_vif(mvm, vif);
1223  out_unref_phy:
1224         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1225  out_free_bf:
1226         if (mvm->bf_allowed_vif == mvmvif) {
1227                 mvm->bf_allowed_vif = NULL;
1228                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1229                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1230         }
1231  out_remove_mac:
1232         mvmvif->phy_ctxt = NULL;
1233         iwl_mvm_mac_ctxt_remove(mvm, vif);
1234  out_release:
1235         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1236                 mvm->vif_count--;
1237
1238         iwl_mvm_mac_ctxt_release(mvm, vif);
1239  out_unlock:
1240         mutex_unlock(&mvm->mutex);
1241
1242         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1243
1244         return ret;
1245 }
1246
1247 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1248                                         struct ieee80211_vif *vif)
1249 {
1250         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1251
1252         if (tfd_msk) {
1253                 mutex_lock(&mvm->mutex);
1254                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1255                 mutex_unlock(&mvm->mutex);
1256         }
1257
1258         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1259                 /*
1260                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1261                  * We assume here that all the packets sent to the OFFCHANNEL
1262                  * queue are sent in ROC session.
1263                  */
1264                 flush_work(&mvm->roc_done_wk);
1265         } else {
1266                 /*
1267                  * By now, all the AC queues are empty. The AGG queues are
1268                  * empty too. We already got all the Tx responses for all the
1269                  * packets in the queues. The drain work can have been
1270                  * triggered. Flush it.
1271                  */
1272                 flush_work(&mvm->sta_drained_wk);
1273         }
1274 }
1275
1276 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1277                                          struct ieee80211_vif *vif)
1278 {
1279         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1280         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1281
1282         iwl_mvm_prepare_mac_removal(mvm, vif);
1283
1284         mutex_lock(&mvm->mutex);
1285
1286         if (mvm->bf_allowed_vif == mvmvif) {
1287                 mvm->bf_allowed_vif = NULL;
1288                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1289                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1290         }
1291
1292         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1293
1294         /*
1295          * For AP/GO interface, the tear down of the resources allocated to the
1296          * interface is be handled as part of the stop_ap flow.
1297          */
1298         if (vif->type == NL80211_IFTYPE_AP ||
1299             vif->type == NL80211_IFTYPE_ADHOC) {
1300 #ifdef CONFIG_NL80211_TESTMODE
1301                 if (vif == mvm->noa_vif) {
1302                         mvm->noa_vif = NULL;
1303                         mvm->noa_duration = 0;
1304                 }
1305 #endif
1306                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1307                 goto out_release;
1308         }
1309
1310         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1311                 mvm->p2p_device_vif = NULL;
1312                 iwl_mvm_rm_bcast_sta(mvm, vif);
1313                 iwl_mvm_binding_remove_vif(mvm, vif);
1314                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1315                 mvmvif->phy_ctxt = NULL;
1316         }
1317
1318         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1319                 mvm->vif_count--;
1320
1321         iwl_mvm_power_update_mac(mvm);
1322         iwl_mvm_mac_ctxt_remove(mvm, vif);
1323
1324 out_release:
1325         iwl_mvm_mac_ctxt_release(mvm, vif);
1326         mutex_unlock(&mvm->mutex);
1327 }
1328
1329 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1330 {
1331         return 0;
1332 }
1333
1334 struct iwl_mvm_mc_iter_data {
1335         struct iwl_mvm *mvm;
1336         int port_id;
1337 };
1338
1339 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1340                                       struct ieee80211_vif *vif)
1341 {
1342         struct iwl_mvm_mc_iter_data *data = _data;
1343         struct iwl_mvm *mvm = data->mvm;
1344         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1345         int ret, len;
1346
1347         /* if we don't have free ports, mcast frames will be dropped */
1348         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1349                 return;
1350
1351         if (vif->type != NL80211_IFTYPE_STATION ||
1352             !vif->bss_conf.assoc)
1353                 return;
1354
1355         cmd->port_id = data->port_id++;
1356         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1357         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1358
1359         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1360         if (ret)
1361                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1362 }
1363
1364 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1365 {
1366         struct iwl_mvm_mc_iter_data iter_data = {
1367                 .mvm = mvm,
1368         };
1369
1370         lockdep_assert_held(&mvm->mutex);
1371
1372         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1373                 return;
1374
1375         ieee80211_iterate_active_interfaces_atomic(
1376                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1377                 iwl_mvm_mc_iface_iterator, &iter_data);
1378 }
1379
1380 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1381                                      struct netdev_hw_addr_list *mc_list)
1382 {
1383         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1384         struct iwl_mcast_filter_cmd *cmd;
1385         struct netdev_hw_addr *addr;
1386         int addr_count;
1387         bool pass_all;
1388         int len;
1389
1390         addr_count = netdev_hw_addr_list_count(mc_list);
1391         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1392                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1393         if (pass_all)
1394                 addr_count = 0;
1395
1396         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1397         cmd = kzalloc(len, GFP_ATOMIC);
1398         if (!cmd)
1399                 return 0;
1400
1401         if (pass_all) {
1402                 cmd->pass_all = 1;
1403                 return (u64)(unsigned long)cmd;
1404         }
1405
1406         netdev_hw_addr_list_for_each(addr, mc_list) {
1407                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1408                                    cmd->count, addr->addr);
1409                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1410                        addr->addr, ETH_ALEN);
1411                 cmd->count++;
1412         }
1413
1414         return (u64)(unsigned long)cmd;
1415 }
1416
1417 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1418                                      unsigned int changed_flags,
1419                                      unsigned int *total_flags,
1420                                      u64 multicast)
1421 {
1422         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1423         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1424
1425         mutex_lock(&mvm->mutex);
1426
1427         /* replace previous configuration */
1428         kfree(mvm->mcast_filter_cmd);
1429         mvm->mcast_filter_cmd = cmd;
1430
1431         if (!cmd)
1432                 goto out;
1433
1434         iwl_mvm_recalc_multicast(mvm);
1435 out:
1436         mutex_unlock(&mvm->mutex);
1437         *total_flags = 0;
1438 }
1439
1440 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1441 struct iwl_bcast_iter_data {
1442         struct iwl_mvm *mvm;
1443         struct iwl_bcast_filter_cmd *cmd;
1444         u8 current_filter;
1445 };
1446
1447 static void
1448 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1449                          const struct iwl_fw_bcast_filter *in_filter,
1450                          struct iwl_fw_bcast_filter *out_filter)
1451 {
1452         struct iwl_fw_bcast_filter_attr *attr;
1453         int i;
1454
1455         memcpy(out_filter, in_filter, sizeof(*out_filter));
1456
1457         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1458                 attr = &out_filter->attrs[i];
1459
1460                 if (!attr->mask)
1461                         break;
1462
1463                 switch (attr->reserved1) {
1464                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1465                         if (vif->bss_conf.arp_addr_cnt != 1) {
1466                                 attr->mask = 0;
1467                                 continue;
1468                         }
1469
1470                         attr->val = vif->bss_conf.arp_addr_list[0];
1471                         break;
1472                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1473                         attr->val = *(__be32 *)&vif->addr[2];
1474                         break;
1475                 default:
1476                         break;
1477                 }
1478                 attr->reserved1 = 0;
1479                 out_filter->num_attrs++;
1480         }
1481 }
1482
1483 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1484                                           struct ieee80211_vif *vif)
1485 {
1486         struct iwl_bcast_iter_data *data = _data;
1487         struct iwl_mvm *mvm = data->mvm;
1488         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1489         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1490         struct iwl_fw_bcast_mac *bcast_mac;
1491         int i;
1492
1493         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1494                 return;
1495
1496         bcast_mac = &cmd->macs[mvmvif->id];
1497
1498         /*
1499          * enable filtering only for associated stations, but not for P2P
1500          * Clients
1501          */
1502         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1503             !vif->bss_conf.assoc)
1504                 return;
1505
1506         bcast_mac->default_discard = 1;
1507
1508         /* copy all configured filters */
1509         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1510                 /*
1511                  * Make sure we don't exceed our filters limit.
1512                  * if there is still a valid filter to be configured,
1513                  * be on the safe side and just allow bcast for this mac.
1514                  */
1515                 if (WARN_ON_ONCE(data->current_filter >=
1516                                  ARRAY_SIZE(cmd->filters))) {
1517                         bcast_mac->default_discard = 0;
1518                         bcast_mac->attached_filters = 0;
1519                         break;
1520                 }
1521
1522                 iwl_mvm_set_bcast_filter(vif,
1523                                          &mvm->bcast_filters[i],
1524                                          &cmd->filters[data->current_filter]);
1525
1526                 /* skip current filter if it contains no attributes */
1527                 if (!cmd->filters[data->current_filter].num_attrs)
1528                         continue;
1529
1530                 /* attach the filter to current mac */
1531                 bcast_mac->attached_filters |=
1532                                 cpu_to_le16(BIT(data->current_filter));
1533
1534                 data->current_filter++;
1535         }
1536 }
1537
1538 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1539                                     struct iwl_bcast_filter_cmd *cmd)
1540 {
1541         struct iwl_bcast_iter_data iter_data = {
1542                 .mvm = mvm,
1543                 .cmd = cmd,
1544         };
1545
1546         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1547                 return false;
1548
1549         memset(cmd, 0, sizeof(*cmd));
1550         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1551         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1552
1553 #ifdef CONFIG_IWLWIFI_DEBUGFS
1554         /* use debugfs filters/macs if override is configured */
1555         if (mvm->dbgfs_bcast_filtering.override) {
1556                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1557                        sizeof(cmd->filters));
1558                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1559                        sizeof(cmd->macs));
1560                 return true;
1561         }
1562 #endif
1563
1564         /* if no filters are configured, do nothing */
1565         if (!mvm->bcast_filters)
1566                 return false;
1567
1568         /* configure and attach these filters for each associated sta vif */
1569         ieee80211_iterate_active_interfaces(
1570                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1571                 iwl_mvm_bcast_filter_iterator, &iter_data);
1572
1573         return true;
1574 }
1575 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1576                                           struct ieee80211_vif *vif)
1577 {
1578         struct iwl_bcast_filter_cmd cmd;
1579
1580         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1581                 return 0;
1582
1583         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1584                 return 0;
1585
1586         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1587                                     sizeof(cmd), &cmd);
1588 }
1589 #else
1590 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1591                                                  struct ieee80211_vif *vif)
1592 {
1593         return 0;
1594 }
1595 #endif
1596
1597 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1598                                              struct ieee80211_vif *vif,
1599                                              struct ieee80211_bss_conf *bss_conf,
1600                                              u32 changes)
1601 {
1602         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1603         int ret;
1604
1605         /*
1606          * Re-calculate the tsf id, as the master-slave relations depend on the
1607          * beacon interval, which was not known when the station interface was
1608          * added.
1609          */
1610         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1611                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1612
1613         /*
1614          * If we're not associated yet, take the (new) BSSID before associating
1615          * so the firmware knows. If we're already associated, then use the old
1616          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1617          * branch for disassociation below.
1618          */
1619         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1620                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1621
1622         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1623         if (ret)
1624                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1625
1626         /* after sending it once, adopt mac80211 data */
1627         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1628         mvmvif->associated = bss_conf->assoc;
1629
1630         if (changes & BSS_CHANGED_ASSOC) {
1631                 if (bss_conf->assoc) {
1632                         /* add quota for this interface */
1633                         ret = iwl_mvm_update_quotas(mvm, NULL);
1634                         if (ret) {
1635                                 IWL_ERR(mvm, "failed to update quotas\n");
1636                                 return;
1637                         }
1638
1639                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1640                                      &mvm->status)) {
1641                                 /*
1642                                  * If we're restarting then the firmware will
1643                                  * obviously have lost synchronisation with
1644                                  * the AP. It will attempt to synchronise by
1645                                  * itself, but we can make it more reliable by
1646                                  * scheduling a session protection time event.
1647                                  *
1648                                  * The firmware needs to receive a beacon to
1649                                  * catch up with synchronisation, use 110% of
1650                                  * the beacon interval.
1651                                  *
1652                                  * Set a large maximum delay to allow for more
1653                                  * than a single interface.
1654                                  */
1655                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1656                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1657                                                         5 * dur, false);
1658                         }
1659
1660                         iwl_mvm_sf_update(mvm, vif, false);
1661                         iwl_mvm_power_vif_assoc(mvm, vif);
1662                         if (vif->p2p) {
1663                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1664                                 iwl_mvm_update_smps(mvm, vif,
1665                                                     IWL_MVM_SMPS_REQ_PROT,
1666                                                     IEEE80211_SMPS_DYNAMIC);
1667                         }
1668                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1669                         /*
1670                          * If update fails - SF might be running in associated
1671                          * mode while disassociated - which is forbidden.
1672                          */
1673                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1674                                   "Failed to update SF upon disassociation\n");
1675
1676                         /* remove AP station now that the MAC is unassoc */
1677                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1678                         if (ret)
1679                                 IWL_ERR(mvm, "failed to remove AP station\n");
1680
1681                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1682                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1683                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1684                         /* remove quota for this interface */
1685                         ret = iwl_mvm_update_quotas(mvm, NULL);
1686                         if (ret)
1687                                 IWL_ERR(mvm, "failed to update quotas\n");
1688
1689                         if (vif->p2p)
1690                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1691
1692                         /* this will take the cleared BSSID from bss_conf */
1693                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1694                         if (ret)
1695                                 IWL_ERR(mvm,
1696                                         "failed to update MAC %pM (clear after unassoc)\n",
1697                                         vif->addr);
1698                 }
1699
1700                 iwl_mvm_recalc_multicast(mvm);
1701                 iwl_mvm_configure_bcast_filter(mvm, vif);
1702
1703                 /* reset rssi values */
1704                 mvmvif->bf_data.ave_beacon_signal = 0;
1705
1706                 iwl_mvm_bt_coex_vif_change(mvm);
1707                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1708                                     IEEE80211_SMPS_AUTOMATIC);
1709         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1710                 /*
1711                  * We received a beacon _after_ association so
1712                  * remove the session protection.
1713                  */
1714                 iwl_mvm_remove_time_event(mvm, mvmvif,
1715                                           &mvmvif->time_event_data);
1716         }
1717
1718         if (changes & BSS_CHANGED_BEACON_INFO) {
1719                 iwl_mvm_sf_update(mvm, vif, false);
1720                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1721         }
1722
1723         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1724                 ret = iwl_mvm_power_update_mac(mvm);
1725                 if (ret)
1726                         IWL_ERR(mvm, "failed to update power mode\n");
1727         }
1728
1729         if (changes & BSS_CHANGED_TXPOWER) {
1730                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1731                                 bss_conf->txpower);
1732                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1733         }
1734
1735         if (changes & BSS_CHANGED_CQM) {
1736                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1737                 /* reset cqm events tracking */
1738                 mvmvif->bf_data.last_cqm_event = 0;
1739                 if (mvmvif->bf_data.bf_enabled) {
1740                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1741                         if (ret)
1742                                 IWL_ERR(mvm,
1743                                         "failed to update CQM thresholds\n");
1744                 }
1745         }
1746
1747         if (changes & BSS_CHANGED_ARP_FILTER) {
1748                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1749                 iwl_mvm_configure_bcast_filter(mvm, vif);
1750         }
1751 }
1752
1753 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1754                                  struct ieee80211_vif *vif)
1755 {
1756         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1757         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1758         int ret;
1759
1760         /*
1761          * iwl_mvm_mac_ctxt_add() might read directly from the device
1762          * (the system time), so make sure it is available.
1763          */
1764         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1765         if (ret)
1766                 return ret;
1767
1768         mutex_lock(&mvm->mutex);
1769
1770         /* Send the beacon template */
1771         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1772         if (ret)
1773                 goto out_unlock;
1774
1775         /*
1776          * Re-calculate the tsf id, as the master-slave relations depend on the
1777          * beacon interval, which was not known when the AP interface was added.
1778          */
1779         if (vif->type == NL80211_IFTYPE_AP)
1780                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1781
1782         /* Add the mac context */
1783         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1784         if (ret)
1785                 goto out_unlock;
1786
1787         /* Perform the binding */
1788         ret = iwl_mvm_binding_add_vif(mvm, vif);
1789         if (ret)
1790                 goto out_remove;
1791
1792         /* Send the bcast station. At this stage the TBTT and DTIM time events
1793          * are added and applied to the scheduler */
1794         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1795         if (ret)
1796                 goto out_unbind;
1797
1798         /* must be set before quota calculations */
1799         mvmvif->ap_ibss_active = true;
1800
1801         /* power updated needs to be done before quotas */
1802         iwl_mvm_power_update_mac(mvm);
1803
1804         ret = iwl_mvm_update_quotas(mvm, NULL);
1805         if (ret)
1806                 goto out_quota_failed;
1807
1808         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1809         if (vif->p2p && mvm->p2p_device_vif)
1810                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1811
1812         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1813
1814         iwl_mvm_bt_coex_vif_change(mvm);
1815
1816         /* we don't support TDLS during DCM */
1817         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1818                 iwl_mvm_teardown_tdls_peers(mvm);
1819
1820         mutex_unlock(&mvm->mutex);
1821         return 0;
1822
1823 out_quota_failed:
1824         iwl_mvm_power_update_mac(mvm);
1825         mvmvif->ap_ibss_active = false;
1826         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1827 out_unbind:
1828         iwl_mvm_binding_remove_vif(mvm, vif);
1829 out_remove:
1830         iwl_mvm_mac_ctxt_remove(mvm, vif);
1831 out_unlock:
1832         mutex_unlock(&mvm->mutex);
1833         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1834         return ret;
1835 }
1836
1837 static void iwl_mvm_stop_ap_ibss(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         /* Handle AP stop while in CSA */
1848         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1849                 iwl_mvm_remove_time_event(mvm, mvmvif,
1850                                           &mvmvif->time_event_data);
1851                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1852         }
1853
1854         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1855                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1856                 mvm->csa_tx_block_bcn_timeout = 0;
1857         }
1858
1859         mvmvif->ap_ibss_active = false;
1860         mvm->ap_last_beacon_gp2 = 0;
1861
1862         iwl_mvm_bt_coex_vif_change(mvm);
1863
1864         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1865
1866         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1867         if (vif->p2p && mvm->p2p_device_vif)
1868                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1869
1870         iwl_mvm_update_quotas(mvm, NULL);
1871         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1872         iwl_mvm_binding_remove_vif(mvm, vif);
1873
1874         iwl_mvm_power_update_mac(mvm);
1875
1876         iwl_mvm_mac_ctxt_remove(mvm, vif);
1877
1878         mutex_unlock(&mvm->mutex);
1879 }
1880
1881 static void
1882 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1883                                  struct ieee80211_vif *vif,
1884                                  struct ieee80211_bss_conf *bss_conf,
1885                                  u32 changes)
1886 {
1887         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1888
1889         /* Changes will be applied when the AP/IBSS is started */
1890         if (!mvmvif->ap_ibss_active)
1891                 return;
1892
1893         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1894                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1895             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1896                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1897
1898         /* Need to send a new beacon template to the FW */
1899         if (changes & BSS_CHANGED_BEACON &&
1900             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1901                 IWL_WARN(mvm, "Failed updating beacon data\n");
1902
1903         if (changes & BSS_CHANGED_TXPOWER) {
1904                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1905                                 bss_conf->txpower);
1906                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1907         }
1908
1909 }
1910
1911 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1912                                      struct ieee80211_vif *vif,
1913                                      struct ieee80211_bss_conf *bss_conf,
1914                                      u32 changes)
1915 {
1916         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1917
1918         /*
1919          * iwl_mvm_bss_info_changed_station() might call
1920          * iwl_mvm_protect_session(), which reads directly from
1921          * the device (the system time), so make sure it is available.
1922          */
1923         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1924                 return;
1925
1926         mutex_lock(&mvm->mutex);
1927
1928         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1929                 iwl_mvm_scan_offload_stop(mvm, true);
1930
1931         switch (vif->type) {
1932         case NL80211_IFTYPE_STATION:
1933                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1934                 break;
1935         case NL80211_IFTYPE_AP:
1936         case NL80211_IFTYPE_ADHOC:
1937                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1938                 break;
1939         default:
1940                 /* shouldn't happen */
1941                 WARN_ON_ONCE(1);
1942         }
1943
1944         mutex_unlock(&mvm->mutex);
1945         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1946 }
1947
1948 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1949                                           enum iwl_scan_status scan_type)
1950 {
1951         int ret;
1952         bool wait_for_handlers = false;
1953
1954         mutex_lock(&mvm->mutex);
1955
1956         if (mvm->scan_status != scan_type) {
1957                 ret = 0;
1958                 /* make sure there are no pending notifications */
1959                 wait_for_handlers = true;
1960                 goto out;
1961         }
1962
1963         switch (scan_type) {
1964         case IWL_MVM_SCAN_SCHED:
1965                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1966                 break;
1967         case IWL_MVM_SCAN_OS:
1968                 ret = iwl_mvm_cancel_scan(mvm);
1969                 break;
1970         case IWL_MVM_SCAN_NONE:
1971         default:
1972                 WARN_ON_ONCE(1);
1973                 ret = -EINVAL;
1974                 break;
1975         }
1976         if (ret)
1977                 goto out;
1978
1979         wait_for_handlers = true;
1980 out:
1981         mutex_unlock(&mvm->mutex);
1982
1983         /* make sure we consume the completion notification */
1984         if (wait_for_handlers)
1985                 iwl_mvm_wait_for_async_handlers(mvm);
1986
1987         return ret;
1988 }
1989 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1990                                struct ieee80211_vif *vif,
1991                                struct ieee80211_scan_request *hw_req)
1992 {
1993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1994         struct cfg80211_scan_request *req = &hw_req->req;
1995         int ret;
1996
1997         if (req->n_channels == 0 ||
1998             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1999                 return -EINVAL;
2000
2001         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2002                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
2003                 if (ret)
2004                         return ret;
2005         }
2006
2007         mutex_lock(&mvm->mutex);
2008
2009         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2010                 ret = -EBUSY;
2011                 goto out;
2012         }
2013
2014         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
2015
2016         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2017                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2018         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2019                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2020         else
2021                 ret = iwl_mvm_scan_request(mvm, vif, req);
2022
2023         if (ret)
2024                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2025 out:
2026         mutex_unlock(&mvm->mutex);
2027         return ret;
2028 }
2029
2030 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2031                                        struct ieee80211_vif *vif)
2032 {
2033         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2034
2035         mutex_lock(&mvm->mutex);
2036
2037         iwl_mvm_cancel_scan(mvm);
2038
2039         mutex_unlock(&mvm->mutex);
2040 }
2041
2042 static void
2043 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2044                                   struct ieee80211_sta *sta, u16 tids,
2045                                   int num_frames,
2046                                   enum ieee80211_frame_release_type reason,
2047                                   bool more_data)
2048 {
2049         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2050
2051         /* Called when we need to transmit (a) frame(s) from mac80211 */
2052
2053         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2054                                           tids, more_data, false);
2055 }
2056
2057 static void
2058 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2059                                     struct ieee80211_sta *sta, u16 tids,
2060                                     int num_frames,
2061                                     enum ieee80211_frame_release_type reason,
2062                                     bool more_data)
2063 {
2064         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2065
2066         /* Called when we need to transmit (a) frame(s) from agg queue */
2067
2068         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2069                                           tids, more_data, true);
2070 }
2071
2072 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2073                                    struct ieee80211_vif *vif,
2074                                    enum sta_notify_cmd cmd,
2075                                    struct ieee80211_sta *sta)
2076 {
2077         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2078         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2079         int tid;
2080
2081         switch (cmd) {
2082         case STA_NOTIFY_SLEEP:
2083                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2084                         ieee80211_sta_block_awake(hw, sta, true);
2085                 spin_lock_bh(&mvmsta->lock);
2086                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2087                         struct iwl_mvm_tid_data *tid_data;
2088
2089                         tid_data = &mvmsta->tid_data[tid];
2090                         if (tid_data->state != IWL_AGG_ON &&
2091                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2092                                 continue;
2093                         if (iwl_mvm_tid_queued(tid_data) == 0)
2094                                 continue;
2095                         ieee80211_sta_set_buffered(sta, tid, true);
2096                 }
2097                 spin_unlock_bh(&mvmsta->lock);
2098                 /*
2099                  * The fw updates the STA to be asleep. Tx packets on the Tx
2100                  * queues to this station will not be transmitted. The fw will
2101                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2102                  */
2103                 break;
2104         case STA_NOTIFY_AWAKE:
2105                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2106                         break;
2107                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2108                 break;
2109         default:
2110                 break;
2111         }
2112 }
2113
2114 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2115                                        struct ieee80211_vif *vif,
2116                                        struct ieee80211_sta *sta)
2117 {
2118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2119         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2120
2121         /*
2122          * This is called before mac80211 does RCU synchronisation,
2123          * so here we already invalidate our internal RCU-protected
2124          * station pointer. The rest of the code will thus no longer
2125          * be able to find the station this way, and we don't rely
2126          * on further RCU synchronisation after the sta_state()
2127          * callback deleted the station.
2128          */
2129         mutex_lock(&mvm->mutex);
2130         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2131                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2132                                    ERR_PTR(-ENOENT));
2133         mutex_unlock(&mvm->mutex);
2134 }
2135
2136 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2137                                  struct ieee80211_vif *vif,
2138                                  struct ieee80211_sta *sta,
2139                                  enum ieee80211_sta_state old_state,
2140                                  enum ieee80211_sta_state new_state)
2141 {
2142         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2143         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2144         int ret;
2145
2146         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2147                            sta->addr, old_state, new_state);
2148
2149         /* this would be a mac80211 bug ... but don't crash */
2150         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2151                 return -EINVAL;
2152
2153         /* if a STA is being removed, reuse its ID */
2154         flush_work(&mvm->sta_drained_wk);
2155
2156         mutex_lock(&mvm->mutex);
2157         if (old_state == IEEE80211_STA_NOTEXIST &&
2158             new_state == IEEE80211_STA_NONE) {
2159                 /*
2160                  * Firmware bug - it'll crash if the beacon interval is less
2161                  * than 16. We can't avoid connecting at all, so refuse the
2162                  * station state change, this will cause mac80211 to abandon
2163                  * attempts to connect to this AP, and eventually wpa_s will
2164                  * blacklist the AP...
2165                  */
2166                 if (vif->type == NL80211_IFTYPE_STATION &&
2167                     vif->bss_conf.beacon_int < 16) {
2168                         IWL_ERR(mvm,
2169                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2170                                 sta->addr, vif->bss_conf.beacon_int);
2171                         ret = -EINVAL;
2172                         goto out_unlock;
2173                 }
2174
2175                 if (sta->tdls &&
2176                     (vif->p2p ||
2177                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2178                                                 IWL_MVM_TDLS_STA_COUNT ||
2179                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2180                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2181                         ret = -EBUSY;
2182                         goto out_unlock;
2183                 }
2184
2185                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2186                 if (sta->tdls && ret == 0)
2187                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2188         } else if (old_state == IEEE80211_STA_NONE &&
2189                    new_state == IEEE80211_STA_AUTH) {
2190                 /*
2191                  * EBS may be disabled due to previous failures reported by FW.
2192                  * Reset EBS status here assuming environment has been changed.
2193                  */
2194                 mvm->last_ebs_successful = true;
2195                 ret = 0;
2196         } else if (old_state == IEEE80211_STA_AUTH &&
2197                    new_state == IEEE80211_STA_ASSOC) {
2198                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2199                 if (ret == 0)
2200                         iwl_mvm_rs_rate_init(mvm, sta,
2201                                              mvmvif->phy_ctxt->channel->band,
2202                                              true);
2203         } else if (old_state == IEEE80211_STA_ASSOC &&
2204                    new_state == IEEE80211_STA_AUTHORIZED) {
2205
2206                 /* we don't support TDLS during DCM */
2207                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2208                         iwl_mvm_teardown_tdls_peers(mvm);
2209
2210                 /* enable beacon filtering */
2211                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2212                 ret = 0;
2213         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2214                    new_state == IEEE80211_STA_ASSOC) {
2215                 /* disable beacon filtering */
2216                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2217                 ret = 0;
2218         } else if (old_state == IEEE80211_STA_ASSOC &&
2219                    new_state == IEEE80211_STA_AUTH) {
2220                 ret = 0;
2221         } else if (old_state == IEEE80211_STA_AUTH &&
2222                    new_state == IEEE80211_STA_NONE) {
2223                 ret = 0;
2224         } else if (old_state == IEEE80211_STA_NONE &&
2225                    new_state == IEEE80211_STA_NOTEXIST) {
2226                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2227                 if (sta->tdls)
2228                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2229         } else {
2230                 ret = -EIO;
2231         }
2232  out_unlock:
2233         mutex_unlock(&mvm->mutex);
2234
2235         if (sta->tdls && ret == 0) {
2236                 if (old_state == IEEE80211_STA_NOTEXIST &&
2237                     new_state == IEEE80211_STA_NONE)
2238                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2239                 else if (old_state == IEEE80211_STA_NONE &&
2240                          new_state == IEEE80211_STA_NOTEXIST)
2241                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2242         }
2243
2244         return ret;
2245 }
2246
2247 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2248 {
2249         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2250
2251         mvm->rts_threshold = value;
2252
2253         return 0;
2254 }
2255
2256 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2257                                   struct ieee80211_vif *vif,
2258                                   struct ieee80211_sta *sta, u32 changed)
2259 {
2260         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2261
2262         if (vif->type == NL80211_IFTYPE_STATION &&
2263             changed & IEEE80211_RC_NSS_CHANGED)
2264                 iwl_mvm_sf_update(mvm, vif, false);
2265 }
2266
2267 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2268                                struct ieee80211_vif *vif, u16 ac,
2269                                const struct ieee80211_tx_queue_params *params)
2270 {
2271         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2272         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2273
2274         mvmvif->queue_params[ac] = *params;
2275
2276         /*
2277          * No need to update right away, we'll get BSS_CHANGED_QOS
2278          * The exception is P2P_DEVICE interface which needs immediate update.
2279          */
2280         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2281                 int ret;
2282
2283                 mutex_lock(&mvm->mutex);
2284                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2285                 mutex_unlock(&mvm->mutex);
2286                 return ret;
2287         }
2288         return 0;
2289 }
2290
2291 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2292                                       struct ieee80211_vif *vif)
2293 {
2294         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2295         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2296                            200 + vif->bss_conf.beacon_int);
2297         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2298                                100 + vif->bss_conf.beacon_int);
2299
2300         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2301                 return;
2302
2303         /*
2304          * iwl_mvm_protect_session() reads directly from the device
2305          * (the system time), so make sure it is available.
2306          */
2307         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2308                 return;
2309
2310         mutex_lock(&mvm->mutex);
2311         /* Try really hard to protect the session and hear a beacon */
2312         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2313         mutex_unlock(&mvm->mutex);
2314
2315         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2316 }
2317
2318 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2319                                         struct ieee80211_vif *vif,
2320                                         struct cfg80211_sched_scan_request *req,
2321                                         struct ieee80211_scan_ies *ies)
2322 {
2323         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2324         int ret;
2325
2326         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2327                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2328                 if (ret)
2329                         return ret;
2330         }
2331
2332         mutex_lock(&mvm->mutex);
2333
2334         /* Newest FW fixes sched scan while connected on another interface */
2335         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2336                 if (!vif->bss_conf.idle) {
2337                         ret = -EBUSY;
2338                         goto out;
2339                 }
2340         } else if (!iwl_mvm_is_idle(mvm)) {
2341                 ret = -EBUSY;
2342                 goto out;
2343         }
2344
2345         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2346                 ret = -EBUSY;
2347                 goto out;
2348         }
2349
2350         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2351         if (ret)
2352                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2353
2354 out:
2355         mutex_unlock(&mvm->mutex);
2356         return ret;
2357 }
2358
2359 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2360                                        struct ieee80211_vif *vif)
2361 {
2362         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2363         int ret;
2364
2365         mutex_lock(&mvm->mutex);
2366         ret = iwl_mvm_scan_offload_stop(mvm, false);
2367         mutex_unlock(&mvm->mutex);
2368         iwl_mvm_wait_for_async_handlers(mvm);
2369
2370         return ret;
2371
2372 }
2373
2374 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2375                                enum set_key_cmd cmd,
2376                                struct ieee80211_vif *vif,
2377                                struct ieee80211_sta *sta,
2378                                struct ieee80211_key_conf *key)
2379 {
2380         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2381         int ret;
2382
2383         if (iwlwifi_mod_params.sw_crypto) {
2384                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2385                 return -EOPNOTSUPP;
2386         }
2387
2388         switch (key->cipher) {
2389         case WLAN_CIPHER_SUITE_TKIP:
2390                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2391                 /* fall-through */
2392         case WLAN_CIPHER_SUITE_CCMP:
2393                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2394                 break;
2395         case WLAN_CIPHER_SUITE_AES_CMAC:
2396                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2397                 break;
2398         case WLAN_CIPHER_SUITE_WEP40:
2399         case WLAN_CIPHER_SUITE_WEP104:
2400                 /* For non-client mode, only use WEP keys for TX as we probably
2401                  * don't have a station yet anyway and would then have to keep
2402                  * track of the keys, linking them to each of the clients/peers
2403                  * as they appear. For now, don't do that, for performance WEP
2404                  * offload doesn't really matter much, but we need it for some
2405                  * other offload features in client mode.
2406                  */
2407                 if (vif->type != NL80211_IFTYPE_STATION)
2408                         return 0;
2409                 break;
2410         default:
2411                 /* currently FW supports only one optional cipher scheme */
2412                 if (hw->n_cipher_schemes &&
2413                     hw->cipher_schemes->cipher == key->cipher)
2414                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2415                 else
2416                         return -EOPNOTSUPP;
2417         }
2418
2419         mutex_lock(&mvm->mutex);
2420
2421         switch (cmd) {
2422         case SET_KEY:
2423                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2424                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2425                         /*
2426                          * GTK on AP interface is a TX-only key, return 0;
2427                          * on IBSS they're per-station and because we're lazy
2428                          * we don't support them for RX, so do the same.
2429                          */
2430                         ret = 0;
2431                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2432                         break;
2433                 }
2434
2435                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2436                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2437                 if (ret) {
2438                         IWL_WARN(mvm, "set key failed\n");
2439                         /*
2440                          * can't add key for RX, but we don't need it
2441                          * in the device for TX so still return 0
2442                          */
2443                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2444                         ret = 0;
2445                 }
2446
2447                 break;
2448         case DISABLE_KEY:
2449                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2450                         ret = 0;
2451                         break;
2452                 }
2453
2454                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2455                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2456                 break;
2457         default:
2458                 ret = -EINVAL;
2459         }
2460
2461         mutex_unlock(&mvm->mutex);
2462         return ret;
2463 }
2464
2465 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2466                                         struct ieee80211_vif *vif,
2467                                         struct ieee80211_key_conf *keyconf,
2468                                         struct ieee80211_sta *sta,
2469                                         u32 iv32, u16 *phase1key)
2470 {
2471         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2472
2473         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2474                 return;
2475
2476         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2477 }
2478
2479
2480 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2481                                struct iwl_rx_packet *pkt, void *data)
2482 {
2483         struct iwl_mvm *mvm =
2484                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2485         struct iwl_hs20_roc_res *resp;
2486         int resp_len = iwl_rx_packet_payload_len(pkt);
2487         struct iwl_mvm_time_event_data *te_data = data;
2488
2489         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2490                 return true;
2491
2492         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2493                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2494                 return true;
2495         }
2496
2497         resp = (void *)pkt->data;
2498
2499         IWL_DEBUG_TE(mvm,
2500                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2501                      resp->status, resp->event_unique_id);
2502
2503         te_data->uid = le32_to_cpu(resp->event_unique_id);
2504         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2505                      te_data->uid);
2506
2507         spin_lock_bh(&mvm->time_event_lock);
2508         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2509         spin_unlock_bh(&mvm->time_event_lock);
2510
2511         return true;
2512 }
2513
2514 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2515 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2516                                     struct ieee80211_channel *channel,
2517                                     struct ieee80211_vif *vif,
2518                                     int duration)
2519 {
2520         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2521         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2522         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2523         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2524         struct iwl_notification_wait wait_time_event;
2525         struct iwl_hs20_roc_req aux_roc_req = {
2526                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2527                 .id_and_color =
2528                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2529                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2530                 /* Set the channel info data */
2531                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2532                         PHY_BAND_24 : PHY_BAND_5,
2533                 .channel_info.channel = channel->hw_value,
2534                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2535                 /* Set the time and duration */
2536                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2537                 .apply_time_max_delay =
2538                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2539                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2540          };
2541
2542         /* Set the node address */
2543         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2544
2545         lockdep_assert_held(&mvm->mutex);
2546
2547         spin_lock_bh(&mvm->time_event_lock);
2548
2549         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2550                 spin_unlock_bh(&mvm->time_event_lock);
2551                 return -EIO;
2552         }
2553
2554         te_data->vif = vif;
2555         te_data->duration = duration;
2556         te_data->id = HOT_SPOT_CMD;
2557
2558         spin_unlock_bh(&mvm->time_event_lock);
2559
2560         /*
2561          * Use a notification wait, which really just processes the
2562          * command response and doesn't wait for anything, in order
2563          * to be able to process the response and get the UID inside
2564          * the RX path. Using CMD_WANT_SKB doesn't work because it
2565          * stores the buffer and then wakes up this thread, by which
2566          * time another notification (that the time event started)
2567          * might already be processed unsuccessfully.
2568          */
2569         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2570                                    time_event_response,
2571                                    ARRAY_SIZE(time_event_response),
2572                                    iwl_mvm_rx_aux_roc, te_data);
2573
2574         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2575                                    &aux_roc_req);
2576
2577         if (res) {
2578                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2579                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2580                 goto out_clear_te;
2581         }
2582
2583         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2584         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2585         /* should never fail */
2586         WARN_ON_ONCE(res);
2587
2588         if (res) {
2589  out_clear_te:
2590                 spin_lock_bh(&mvm->time_event_lock);
2591                 iwl_mvm_te_clear_data(mvm, te_data);
2592                 spin_unlock_bh(&mvm->time_event_lock);
2593         }
2594
2595         return res;
2596 }
2597
2598 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2599                        struct ieee80211_vif *vif,
2600                        struct ieee80211_channel *channel,
2601                        int duration,
2602                        enum ieee80211_roc_type type)
2603 {
2604         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2605         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2606         struct cfg80211_chan_def chandef;
2607         struct iwl_mvm_phy_ctxt *phy_ctxt;
2608         int ret, i;
2609
2610         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2611                            duration, type);
2612
2613         mutex_lock(&mvm->mutex);
2614
2615         switch (vif->type) {
2616         case NL80211_IFTYPE_STATION:
2617                 if (mvm->fw->ucode_capa.capa[0] &
2618                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2619                         /* Use aux roc framework (HS20) */
2620                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2621                                                        vif, duration);
2622                         goto out_unlock;
2623                 }
2624                 IWL_ERR(mvm, "hotspot not supported\n");
2625                 ret = -EINVAL;
2626                 goto out_unlock;
2627         case NL80211_IFTYPE_P2P_DEVICE:
2628                 /* handle below */
2629                 break;
2630         default:
2631                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2632                 ret = -EINVAL;
2633                 goto out_unlock;
2634         }
2635
2636         for (i = 0; i < NUM_PHY_CTX; i++) {
2637                 phy_ctxt = &mvm->phy_ctxts[i];
2638                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2639                         continue;
2640
2641                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2642                         /*
2643                          * Unbind the P2P_DEVICE from the current PHY context,
2644                          * and if the PHY context is not used remove it.
2645                          */
2646                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2647                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2648                                 goto out_unlock;
2649
2650                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2651
2652                         /* Bind the P2P_DEVICE to the current PHY Context */
2653                         mvmvif->phy_ctxt = phy_ctxt;
2654
2655                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2656                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2657                                 goto out_unlock;
2658
2659                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2660                         goto schedule_time_event;
2661                 }
2662         }
2663
2664         /* Need to update the PHY context only if the ROC channel changed */
2665         if (channel == mvmvif->phy_ctxt->channel)
2666                 goto schedule_time_event;
2667
2668         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2669
2670         /*
2671          * Change the PHY context configuration as it is currently referenced
2672          * only by the P2P Device MAC
2673          */
2674         if (mvmvif->phy_ctxt->ref == 1) {
2675                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2676                                                &chandef, 1, 1);
2677                 if (ret)
2678                         goto out_unlock;
2679         } else {
2680                 /*
2681                  * The PHY context is shared with other MACs. Need to remove the
2682                  * P2P Device from the binding, allocate an new PHY context and
2683                  * create a new binding
2684                  */
2685                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2686                 if (!phy_ctxt) {
2687                         ret = -ENOSPC;
2688                         goto out_unlock;
2689                 }
2690
2691                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2692                                                1, 1);
2693                 if (ret) {
2694                         IWL_ERR(mvm, "Failed to change PHY context\n");
2695                         goto out_unlock;
2696                 }
2697
2698                 /* Unbind the P2P_DEVICE from the current PHY context */
2699                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2700                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2701                         goto out_unlock;
2702
2703                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2704
2705                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2706                 mvmvif->phy_ctxt = phy_ctxt;
2707
2708                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2709                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2710                         goto out_unlock;
2711
2712                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2713         }
2714
2715 schedule_time_event:
2716         /* Schedule the time events */
2717         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2718
2719 out_unlock:
2720         mutex_unlock(&mvm->mutex);
2721         IWL_DEBUG_MAC80211(mvm, "leave\n");
2722         return ret;
2723 }
2724
2725 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2726 {
2727         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2728
2729         IWL_DEBUG_MAC80211(mvm, "enter\n");
2730
2731         mutex_lock(&mvm->mutex);
2732         iwl_mvm_stop_roc(mvm);
2733         mutex_unlock(&mvm->mutex);
2734
2735         IWL_DEBUG_MAC80211(mvm, "leave\n");
2736         return 0;
2737 }
2738
2739 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2740                                  struct ieee80211_chanctx_conf *ctx)
2741 {
2742         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2743         struct iwl_mvm_phy_ctxt *phy_ctxt;
2744         int ret;
2745
2746         lockdep_assert_held(&mvm->mutex);
2747
2748         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2749
2750         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2751         if (!phy_ctxt) {
2752                 ret = -ENOSPC;
2753                 goto out;
2754         }
2755
2756         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2757                                        ctx->rx_chains_static,
2758                                        ctx->rx_chains_dynamic);
2759         if (ret) {
2760                 IWL_ERR(mvm, "Failed to add PHY context\n");
2761                 goto out;
2762         }
2763
2764         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2765         *phy_ctxt_id = phy_ctxt->id;
2766 out:
2767         return ret;
2768 }
2769
2770 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2771                                struct ieee80211_chanctx_conf *ctx)
2772 {
2773         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2774         int ret;
2775
2776         mutex_lock(&mvm->mutex);
2777         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2778         mutex_unlock(&mvm->mutex);
2779
2780         return ret;
2781 }
2782
2783 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2784                                      struct ieee80211_chanctx_conf *ctx)
2785 {
2786         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2787         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2788
2789         lockdep_assert_held(&mvm->mutex);
2790
2791         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2792 }
2793
2794 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2795                                    struct ieee80211_chanctx_conf *ctx)
2796 {
2797         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2798
2799         mutex_lock(&mvm->mutex);
2800         __iwl_mvm_remove_chanctx(mvm, ctx);
2801         mutex_unlock(&mvm->mutex);
2802 }
2803
2804 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2805                                    struct ieee80211_chanctx_conf *ctx,
2806                                    u32 changed)
2807 {
2808         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2809         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2810         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2811
2812         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2813                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2814                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2815                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2816                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2817                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2818                       phy_ctxt->ref, changed))
2819                 return;
2820
2821         mutex_lock(&mvm->mutex);
2822         iwl_mvm_bt_coex_vif_change(mvm);
2823         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2824                                  ctx->rx_chains_static,
2825                                  ctx->rx_chains_dynamic);
2826         mutex_unlock(&mvm->mutex);
2827 }
2828
2829 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2830                                         struct ieee80211_vif *vif,
2831                                         struct ieee80211_chanctx_conf *ctx,
2832                                         bool switching_chanctx)
2833 {
2834         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2835         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2836         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2837         int ret;
2838
2839         lockdep_assert_held(&mvm->mutex);
2840
2841         mvmvif->phy_ctxt = phy_ctxt;
2842
2843         switch (vif->type) {
2844         case NL80211_IFTYPE_AP:
2845                 /* only needed if we're switching chanctx (i.e. during CSA) */
2846                 if (switching_chanctx) {
2847                         mvmvif->ap_ibss_active = true;
2848                         break;
2849                 }
2850         case NL80211_IFTYPE_ADHOC:
2851                 /*
2852                  * The AP binding flow is handled as part of the start_ap flow
2853                  * (in bss_info_changed), similarly for IBSS.
2854                  */
2855                 ret = 0;
2856                 goto out;
2857         case NL80211_IFTYPE_STATION:
2858                 break;
2859         case NL80211_IFTYPE_MONITOR:
2860                 /* always disable PS when a monitor interface is active */
2861                 mvmvif->ps_disabled = true;
2862                 break;
2863         default:
2864                 ret = -EINVAL;
2865                 goto out;
2866         }
2867
2868         ret = iwl_mvm_binding_add_vif(mvm, vif);
2869         if (ret)
2870                 goto out;
2871
2872         /*
2873          * Power state must be updated before quotas,
2874          * otherwise fw will complain.
2875          */
2876         iwl_mvm_power_update_mac(mvm);
2877
2878         /* Setting the quota at this stage is only required for monitor
2879          * interfaces. For the other types, the bss_info changed flow
2880          * will handle quota settings.
2881          */
2882         if (vif->type == NL80211_IFTYPE_MONITOR) {
2883                 mvmvif->monitor_active = true;
2884                 ret = iwl_mvm_update_quotas(mvm, NULL);
2885                 if (ret)
2886                         goto out_remove_binding;
2887         }
2888
2889         /* Handle binding during CSA */
2890         if (vif->type == NL80211_IFTYPE_AP) {
2891                 iwl_mvm_update_quotas(mvm, NULL);
2892                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2893         }
2894
2895         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
2896                 u32 duration = 2 * vif->bss_conf.beacon_int;
2897
2898                 /* iwl_mvm_protect_session() reads directly from the
2899                  * device (the system time), so make sure it is
2900                  * available.
2901                  */
2902                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
2903                 if (ret)
2904                         goto out_remove_binding;
2905
2906                 /* Protect the session to make sure we hear the first
2907                  * beacon on the new channel.
2908                  */
2909                 iwl_mvm_protect_session(mvm, vif, duration, duration,
2910                                         vif->bss_conf.beacon_int / 2,
2911                                         true);
2912
2913                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
2914
2915                 iwl_mvm_update_quotas(mvm, NULL);
2916         }
2917
2918         goto out;
2919
2920 out_remove_binding:
2921         iwl_mvm_binding_remove_vif(mvm, vif);
2922         iwl_mvm_power_update_mac(mvm);
2923 out:
2924         if (ret)
2925                 mvmvif->phy_ctxt = NULL;
2926         return ret;
2927 }
2928 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2929                                       struct ieee80211_vif *vif,
2930                                       struct ieee80211_chanctx_conf *ctx)
2931 {
2932         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2933         int ret;
2934
2935         mutex_lock(&mvm->mutex);
2936         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2937         mutex_unlock(&mvm->mutex);
2938
2939         return ret;
2940 }
2941
2942 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2943                                            struct ieee80211_vif *vif,
2944                                            struct ieee80211_chanctx_conf *ctx,
2945                                            bool switching_chanctx)
2946 {
2947         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2948         struct ieee80211_vif *disabled_vif = NULL;
2949
2950         lockdep_assert_held(&mvm->mutex);
2951
2952         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2953
2954         switch (vif->type) {
2955         case NL80211_IFTYPE_ADHOC:
2956                 goto out;
2957         case NL80211_IFTYPE_MONITOR:
2958                 mvmvif->monitor_active = false;
2959                 mvmvif->ps_disabled = false;
2960                 break;
2961         case NL80211_IFTYPE_AP:
2962                 /* This part is triggered only during CSA */
2963                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
2964                         goto out;
2965
2966                 mvmvif->csa_countdown = false;
2967
2968                 /* Set CS bit on all the stations */
2969                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2970
2971                 /* Save blocked iface, the timeout is set on the next beacon */
2972                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2973
2974                 mvmvif->ap_ibss_active = false;
2975                 break;
2976         case NL80211_IFTYPE_STATION:
2977                 if (!switching_chanctx)
2978                         break;
2979
2980                 disabled_vif = vif;
2981
2982                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2983                 break;
2984         default:
2985                 break;
2986         }
2987
2988         iwl_mvm_update_quotas(mvm, disabled_vif);
2989         iwl_mvm_binding_remove_vif(mvm, vif);
2990
2991 out:
2992         mvmvif->phy_ctxt = NULL;
2993         iwl_mvm_power_update_mac(mvm);
2994 }
2995
2996 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2997                                          struct ieee80211_vif *vif,
2998                                          struct ieee80211_chanctx_conf *ctx)
2999 {
3000         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3001
3002         mutex_lock(&mvm->mutex);
3003         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3004         mutex_unlock(&mvm->mutex);
3005 }
3006
3007 static int
3008 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3009                                 struct ieee80211_vif_chanctx_switch *vifs)
3010 {
3011         int ret;
3012
3013         mutex_lock(&mvm->mutex);
3014         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3015         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3016
3017         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3018         if (ret) {
3019                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3020                 goto out_reassign;
3021         }
3022
3023         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3024                                            true);
3025         if (ret) {
3026                 IWL_ERR(mvm,
3027                         "failed to assign new_ctx during channel switch\n");
3028                 goto out_remove;
3029         }
3030
3031         /* we don't support TDLS during DCM - can be caused by channel switch */
3032         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3033                 iwl_mvm_teardown_tdls_peers(mvm);
3034
3035         goto out;
3036
3037 out_remove:
3038         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3039
3040 out_reassign:
3041         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3042                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3043                 goto out_restart;
3044         }
3045
3046         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3047                                          true)) {
3048                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3049                 goto out_restart;
3050         }
3051
3052         goto out;
3053
3054 out_restart:
3055         /* things keep failing, better restart the hw */
3056         iwl_mvm_nic_restart(mvm, false);
3057
3058 out:
3059         mutex_unlock(&mvm->mutex);
3060
3061         return ret;
3062 }
3063
3064 static int
3065 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3066                                     struct ieee80211_vif_chanctx_switch *vifs)
3067 {
3068         int ret;
3069
3070         mutex_lock(&mvm->mutex);
3071         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3072
3073         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3074                                            true);
3075         if (ret) {
3076                 IWL_ERR(mvm,
3077                         "failed to assign new_ctx during channel switch\n");
3078                 goto out_reassign;
3079         }
3080
3081         goto out;
3082
3083 out_reassign:
3084         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3085                                          true)) {
3086                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3087                 goto out_restart;
3088         }
3089
3090         goto out;
3091
3092 out_restart:
3093         /* things keep failing, better restart the hw */
3094         iwl_mvm_nic_restart(mvm, false);
3095
3096 out:
3097         mutex_unlock(&mvm->mutex);
3098
3099         return ret;
3100 }
3101
3102 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3103                                       struct ieee80211_vif_chanctx_switch *vifs,
3104                                       int n_vifs,
3105                                       enum ieee80211_chanctx_switch_mode mode)
3106 {
3107         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3108         int ret;
3109
3110         /* we only support a single-vif right now */
3111         if (n_vifs > 1)
3112                 return -EOPNOTSUPP;
3113
3114         switch (mode) {
3115         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3116                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3117                 break;
3118         case CHANCTX_SWMODE_REASSIGN_VIF:
3119                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3120                 break;
3121         default:
3122                 ret = -EOPNOTSUPP;
3123                 break;
3124         }
3125
3126         return ret;
3127 }
3128
3129 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3130                            struct ieee80211_sta *sta,
3131                            bool set)
3132 {
3133         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3134         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3135
3136         if (!mvm_sta || !mvm_sta->vif) {
3137                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3138                 return -EINVAL;
3139         }
3140
3141         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3142 }
3143
3144 #ifdef CONFIG_NL80211_TESTMODE
3145 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3146         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3147         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3148         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3149 };
3150
3151 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3152                                       struct ieee80211_vif *vif,
3153                                       void *data, int len)
3154 {
3155         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3156         int err;
3157         u32 noa_duration;
3158
3159         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3160         if (err)
3161                 return err;
3162
3163         if (!tb[IWL_MVM_TM_ATTR_CMD])
3164                 return -EINVAL;
3165
3166         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3167         case IWL_MVM_TM_CMD_SET_NOA:
3168                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3169                     !vif->bss_conf.enable_beacon ||
3170                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3171                         return -EINVAL;
3172
3173                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3174                 if (noa_duration >= vif->bss_conf.beacon_int)
3175                         return -EINVAL;
3176
3177                 mvm->noa_duration = noa_duration;
3178                 mvm->noa_vif = vif;
3179
3180                 return iwl_mvm_update_quotas(mvm, NULL);
3181         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3182                 /* must be associated client vif - ignore authorized */
3183                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3184                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3185                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3186                         return -EINVAL;
3187
3188                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3189                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3190                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3191         }
3192
3193         return -EOPNOTSUPP;
3194 }
3195
3196 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3197                                     struct ieee80211_vif *vif,
3198                                     void *data, int len)
3199 {
3200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3201         int err;
3202
3203         mutex_lock(&mvm->mutex);
3204         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3205         mutex_unlock(&mvm->mutex);
3206
3207         return err;
3208 }
3209 #endif
3210
3211 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3212                                    struct ieee80211_vif *vif,
3213                                    struct ieee80211_channel_switch *chsw)
3214 {
3215         /* By implementing this operation, we prevent mac80211 from
3216          * starting its own channel switch timer, so that we can call
3217          * ieee80211_chswitch_done() ourselves at the right time
3218          * (which is when the absence time event starts).
3219          */
3220
3221         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3222                            "dummy channel switch op\n");
3223 }
3224
3225 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3226                                       struct ieee80211_vif *vif,
3227                                       struct ieee80211_channel_switch *chsw)
3228 {
3229         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3230         struct ieee80211_vif *csa_vif;
3231         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3232         u32 apply_time;
3233         int ret;
3234
3235         mutex_lock(&mvm->mutex);
3236
3237         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3238                            chsw->chandef.center_freq1);
3239
3240         switch (vif->type) {
3241         case NL80211_IFTYPE_AP:
3242                 csa_vif =
3243                         rcu_dereference_protected(mvm->csa_vif,
3244                                                   lockdep_is_held(&mvm->mutex));
3245                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3246                               "Another CSA is already in progress")) {
3247                         ret = -EBUSY;
3248                         goto out_unlock;
3249                 }
3250
3251                 rcu_assign_pointer(mvm->csa_vif, vif);
3252
3253                 if (WARN_ONCE(mvmvif->csa_countdown,
3254                               "Previous CSA countdown didn't complete")) {
3255                         ret = -EBUSY;
3256                         goto out_unlock;
3257                 }
3258
3259                 break;
3260         case NL80211_IFTYPE_STATION:
3261                 /* Schedule the time event to a bit before beacon 1,
3262                  * to make sure we're in the new channel when the
3263                  * GO/AP arrives.
3264                  */
3265                 apply_time = chsw->device_timestamp +
3266                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3267                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3268
3269                 if (chsw->block_tx)
3270                         iwl_mvm_csa_client_absent(mvm, vif);
3271
3272                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3273                                             apply_time);
3274                 if (mvmvif->bf_data.bf_enabled) {
3275                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3276                         if (ret)
3277                                 goto out_unlock;
3278                 }
3279
3280                 break;
3281         default:
3282                 break;
3283         }
3284
3285         mvmvif->ps_disabled = true;
3286
3287         ret = iwl_mvm_power_update_ps(mvm);
3288         if (ret)
3289                 goto out_unlock;
3290
3291         /* we won't be on this channel any longer */
3292         iwl_mvm_teardown_tdls_peers(mvm);
3293
3294 out_unlock:
3295         mutex_unlock(&mvm->mutex);
3296
3297         return ret;
3298 }
3299
3300 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3301                                        struct ieee80211_vif *vif)
3302 {
3303         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3304         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3305         int ret;
3306
3307         mutex_lock(&mvm->mutex);
3308
3309         if (vif->type == NL80211_IFTYPE_STATION) {
3310                 struct iwl_mvm_sta *mvmsta;
3311
3312                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3313                                                           mvmvif->ap_sta_id);
3314
3315                 if (WARN_ON(!mvmsta)) {
3316                         ret = -EIO;
3317                         goto out_unlock;
3318                 }
3319
3320                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3321
3322                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3323
3324                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3325                 if (ret)
3326                         goto out_unlock;
3327
3328                 iwl_mvm_stop_session_protection(mvm, vif);
3329         }
3330
3331         mvmvif->ps_disabled = false;
3332
3333         ret = iwl_mvm_power_update_ps(mvm);
3334
3335 out_unlock:
3336         mutex_unlock(&mvm->mutex);
3337
3338         return ret;
3339 }
3340
3341 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3342                               struct ieee80211_vif *vif, u32 queues, bool drop)
3343 {
3344         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3345         struct iwl_mvm_vif *mvmvif;
3346         struct iwl_mvm_sta *mvmsta;
3347         struct ieee80211_sta *sta;
3348         int i;
3349         u32 msk = 0;
3350
3351         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3352                 return;
3353
3354         mutex_lock(&mvm->mutex);
3355         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3356
3357         /* flush the AP-station and all TDLS peers */
3358         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3359                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3360                                                 lockdep_is_held(&mvm->mutex));
3361                 if (IS_ERR_OR_NULL(sta))
3362                         continue;
3363
3364                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3365                 if (mvmsta->vif != vif)
3366                         continue;
3367
3368                 /* make sure only TDLS peers or the AP are flushed */
3369                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3370
3371                 msk |= mvmsta->tfd_queue_msk;
3372         }
3373
3374         if (drop) {
3375                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3376                         IWL_ERR(mvm, "flush request fail\n");
3377                 mutex_unlock(&mvm->mutex);
3378         } else {
3379                 mutex_unlock(&mvm->mutex);
3380
3381                 /* this can take a while, and we may need/want other operations
3382                  * to succeed while doing this, so do it without the mutex held
3383                  */
3384                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3385         }
3386 }
3387
3388 const struct ieee80211_ops iwl_mvm_hw_ops = {
3389         .tx = iwl_mvm_mac_tx,
3390         .ampdu_action = iwl_mvm_mac_ampdu_action,
3391         .start = iwl_mvm_mac_start,
3392         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3393         .stop = iwl_mvm_mac_stop,
3394         .add_interface = iwl_mvm_mac_add_interface,
3395         .remove_interface = iwl_mvm_mac_remove_interface,
3396         .config = iwl_mvm_mac_config,
3397         .prepare_multicast = iwl_mvm_prepare_multicast,
3398         .configure_filter = iwl_mvm_configure_filter,
3399         .bss_info_changed = iwl_mvm_bss_info_changed,
3400         .hw_scan = iwl_mvm_mac_hw_scan,
3401         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3402         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3403         .sta_state = iwl_mvm_mac_sta_state,
3404         .sta_notify = iwl_mvm_mac_sta_notify,
3405         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3406         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3407         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3408         .sta_rc_update = iwl_mvm_sta_rc_update,
3409         .conf_tx = iwl_mvm_mac_conf_tx,
3410         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3411         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3412         .flush = iwl_mvm_mac_flush,
3413         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3414         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3415         .set_key = iwl_mvm_mac_set_key,
3416         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3417         .remain_on_channel = iwl_mvm_roc,
3418         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3419         .add_chanctx = iwl_mvm_add_chanctx,
3420         .remove_chanctx = iwl_mvm_remove_chanctx,
3421         .change_chanctx = iwl_mvm_change_chanctx,
3422         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3423         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3424         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3425
3426         .start_ap = iwl_mvm_start_ap_ibss,
3427         .stop_ap = iwl_mvm_stop_ap_ibss,
3428         .join_ibss = iwl_mvm_start_ap_ibss,
3429         .leave_ibss = iwl_mvm_stop_ap_ibss,
3430
3431         .set_tim = iwl_mvm_set_tim,
3432
3433         .channel_switch = iwl_mvm_channel_switch,
3434         .pre_channel_switch = iwl_mvm_pre_channel_switch,
3435         .post_channel_switch = iwl_mvm_post_channel_switch,
3436
3437         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3438         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3439         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3440
3441         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3442
3443 #ifdef CONFIG_PM_SLEEP
3444         /* look at d3.c */
3445         .suspend = iwl_mvm_suspend,
3446         .resume = iwl_mvm_resume,
3447         .set_wakeup = iwl_mvm_set_wakeup,
3448         .set_rekey_data = iwl_mvm_set_rekey_data,
3449 #if IS_ENABLED(CONFIG_IPV6)
3450         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3451 #endif
3452         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3453 #endif
3454 };