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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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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,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 258 {
 259         int i;
 260         bool taken = false;
 261
 262         if (!iwl_mvm_is_d0i3_supported(mvm))
 263                 return true;
 264
 265         spin_lock_bh(&mvm->refs_lock);
 266         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 267                 if (mvm->refs[i]) {
 268                         taken = true;
 269                         break;
 270                 }
 271         }
 272         spin_unlock_bh(&mvm->refs_lock);
 273
 274         return taken;
 275 }
 276
 277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 278 {
 279         iwl_mvm_ref(mvm, ref_type);
 280
 281         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 282                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 283                                 HZ)) {
 284                 WARN_ON_ONCE(1);
 285                 iwl_mvm_unref(mvm, ref_type);
 286                 return -EIO;
 287         }
 288
 289         return 0;
 290 }
 291
 292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 293 {
 294         int i;
 295
 296         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 297         for (i = 0; i < NUM_PHY_CTX; i++) {
 298                 mvm->phy_ctxts[i].id = i;
 299                 mvm->phy_ctxts[i].ref = 0;
 300         }
 301 }
 302
 303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 304 {
 305         struct ieee80211_hw *hw = mvm->hw;
 306         int num_mac, ret, i;
 307
 308         /* Tell mac80211 our characteristics */
 309         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 310                     IEEE80211_HW_SPECTRUM_MGMT |
 311                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 312                     IEEE80211_HW_QUEUE_CONTROL |
 313                     IEEE80211_HW_WANT_MONITOR_VIF |
 314                     IEEE80211_HW_SUPPORTS_PS |
 315                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 316                     IEEE80211_HW_AMPDU_AGGREGATION |
 317                     IEEE80211_HW_TIMING_BEACON_ONLY |
 318                     IEEE80211_HW_CONNECTION_MONITOR |
 319                     IEEE80211_HW_CHANCTX_STA_CSA |
 320                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 321
 322         hw->queues = mvm->first_agg_queue;
 323         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 324         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 325                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 326         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 327         hw->rate_control_algorithm = "iwl-mvm-rs";
 328
 329         /*
 330          * Enable 11w if advertised by firmware and software crypto
 331          * is not enabled (as the firmware will interpret some mgmt
 332          * packets, so enabling it with software crypto isn't safe)
 333          */
 334         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 335             !iwlwifi_mod_params.sw_crypto)
 336                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 337
 338         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 339             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 340             !iwlwifi_mod_params.uapsd_disable) {
 341                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 342                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 343                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 344         }
 345
 346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 347                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 348
 349         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 350         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 351         hw->chanctx_data_size = sizeof(u16);
 352
 353         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 354                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 355                 BIT(NL80211_IFTYPE_AP) |
 356                 BIT(NL80211_IFTYPE_P2P_GO) |
 357                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 358                 BIT(NL80211_IFTYPE_ADHOC);
 359
 360         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 361         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 362                                        REGULATORY_DISABLE_BEACON_HINTS;
 363
 364         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 365                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 366
 367         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 368                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 369
 370         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 371         hw->wiphy->n_iface_combinations =
 372                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 373
 374         hw->wiphy->max_remain_on_channel_duration = 10000;
 375         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 376
 377         /* Extract MAC address */
 378         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 379         hw->wiphy->addresses = mvm->addresses;
 380         hw->wiphy->n_addresses = 1;
 381
 382         /* Extract additional MAC addresses if available */
 383         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 384                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 385
 386         for (i = 1; i < num_mac; i++) {
 387                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 388                        ETH_ALEN);
 389                 mvm->addresses[i].addr[5]++;
 390                 hw->wiphy->n_addresses++;
 391         }
 392
 393         iwl_mvm_reset_phy_ctxts(mvm);
 394
 395         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 396
 397         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 398
 399         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 400                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 401                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 402         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 403                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 404                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 405
 406         hw->wiphy->hw_version = mvm->trans->hw_id;
 407
 408         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 409                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 410         else
 411                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 412
 413         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 414                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 415                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 416                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 417                 /* we create the 802.11 header and zero length SSID IE. */
 418                 hw->wiphy->max_sched_scan_ie_len =
 419                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 420         }
 421
 422         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 423                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 424                                NL80211_FEATURE_P2P_GO_OPPPS |
 425                                NL80211_FEATURE_DYNAMIC_SMPS |
 426                                NL80211_FEATURE_STATIC_SMPS;
 427
 428         if (mvm->fw->ucode_capa.capa[0] &
 429             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 430                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 431         if (mvm->fw->ucode_capa.capa[0] &
 432             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 433                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 434
 435         if (mvm->fw->ucode_capa.capa[0] &
 436             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 437                 hw->wiphy->features |=
 438                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 439
 440         if (mvm->fw->ucode_capa.capa[0] &
 441             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 442                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 443
 444         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 445
 446         /* currently FW API supports only one optional cipher scheme */
 447         if (mvm->fw->cs[0].cipher) {
 448                 mvm->hw->n_cipher_schemes = 1;
 449                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 450         }
 451
 452 #ifdef CONFIG_PM_SLEEP
 453         if (iwl_mvm_is_d0i3_supported(mvm) &&
 454             device_can_wakeup(mvm->trans->dev)) {
 455                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 456                 hw->wiphy->wowlan = &mvm->wowlan;
 457         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 458             mvm->trans->ops->d3_suspend &&
 459             mvm->trans->ops->d3_resume &&
 460             device_can_wakeup(mvm->trans->dev)) {
 461                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 462                                     WIPHY_WOWLAN_DISCONNECT |
 463                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 464                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 465                 if (!iwlwifi_mod_params.sw_crypto)
 466                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 467                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 468                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 469
 470                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 471                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 472                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 473                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 474                 hw->wiphy->wowlan = &mvm->wowlan;
 475         }
 476 #endif
 477
 478 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 479         /* assign default bcast filtering configuration */
 480         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 481 #endif
 482
 483         ret = iwl_mvm_leds_init(mvm);
 484         if (ret)
 485                 return ret;
 486
 487         ret = ieee80211_register_hw(mvm->hw);
 488         if (ret)
 489                 iwl_mvm_leds_exit(mvm);
 490
 491         return ret;
 492 }
 493
 494 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 495                              struct ieee80211_sta *sta,
 496                              struct sk_buff *skb)
 497 {
 498         struct iwl_mvm_sta *mvmsta;
 499         bool defer = false;
 500
 501         /*
 502          * double check the IN_D0I3 flag both before and after
 503          * taking the spinlock, in order to prevent taking
 504          * the spinlock when not needed.
 505          */
 506         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 507                 return false;
 508
 509         spin_lock(&mvm->d0i3_tx_lock);
 510         /*
 511          * testing the flag again ensures the skb dequeue
 512          * loop (on d0i3 exit) hasn't run yet.
 513          */
 514         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 515                 goto out;
 516
 517         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 518         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 519             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 520                 goto out;
 521
 522         __skb_queue_tail(&mvm->d0i3_tx, skb);
 523         ieee80211_stop_queues(mvm->hw);
 524
 525         /* trigger wakeup */
 526         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 527         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 528
 529         defer = true;
 530 out:
 531         spin_unlock(&mvm->d0i3_tx_lock);
 532         return defer;
 533 }
 534
 535 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 536                            struct ieee80211_tx_control *control,
 537                            struct sk_buff *skb)
 538 {
 539         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 540         struct ieee80211_sta *sta = control->sta;
 541         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 542         struct ieee80211_hdr *hdr = (void *)skb->data;
 543
 544         if (iwl_mvm_is_radio_killed(mvm)) {
 545                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 546                 goto drop;
 547         }
 548
 549         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 550             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 551             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 552                 goto drop;
 553
 554         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 555         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 556                      ieee80211_is_mgmt(hdr->frame_control) &&
 557                      !ieee80211_is_deauth(hdr->frame_control) &&
 558                      !ieee80211_is_disassoc(hdr->frame_control) &&
 559                      !ieee80211_is_action(hdr->frame_control)))
 560                 sta = NULL;
 561
 562         if (sta) {
 563                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 564                         return;
 565                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 566                         goto drop;
 567                 return;
 568         }
 569
 570         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 571                 goto drop;
 572         return;
 573  drop:
 574         ieee80211_free_txskb(hw, skb);
 575 }
 576
 577 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 578 {
 579         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 580                 return false;
 581         return true;
 582 }
 583
 584 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 585 {
 586         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 587                 return false;
 588         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 589                 return true;
 590
 591         /* enabled by default */
 592         return true;
 593 }
 594
 595 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 596                                     struct ieee80211_vif *vif,
 597                                     enum ieee80211_ampdu_mlme_action action,
 598                                     struct ieee80211_sta *sta, u16 tid,
 599                                     u16 *ssn, u8 buf_size)
 600 {
 601         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 602         int ret;
 603         bool tx_agg_ref = false;
 604
 605         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 606                      sta->addr, tid, action);
 607
 608         if (!(mvm->nvm_data->sku_cap_11n_enable))
 609                 return -EACCES;
 610
 611         /* return from D0i3 before starting a new Tx aggregation */
 612         switch (action) {
 613         case IEEE80211_AMPDU_TX_START:
 614         case IEEE80211_AMPDU_TX_STOP_CONT:
 615         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 616         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 617         case IEEE80211_AMPDU_TX_OPERATIONAL:
 618                 /*
 619                  * for tx start, wait synchronously until D0i3 exit to
 620                  * get the correct sequence number for the tid.
 621                  * additionally, some other ampdu actions use direct
 622                  * target access, which is not handled automatically
 623                  * by the trans layer (unlike commands), so wait for
 624                  * d0i3 exit in these cases as well.
 625                  */
 626                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 627                 if (ret)
 628                         return ret;
 629
 630                 tx_agg_ref = true;
 631                 break;
 632         default:
 633                 break;
 634         }
 635
 636         mutex_lock(&mvm->mutex);
 637
 638         switch (action) {
 639         case IEEE80211_AMPDU_RX_START:
 640                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 641                         ret = -EINVAL;
 642                         break;
 643                 }
 644                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 645                 break;
 646         case IEEE80211_AMPDU_RX_STOP:
 647                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 648                 break;
 649         case IEEE80211_AMPDU_TX_START:
 650                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 651                         ret = -EINVAL;
 652                         break;
 653                 }
 654                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 655                 break;
 656         case IEEE80211_AMPDU_TX_STOP_CONT:
 657                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 658                 break;
 659         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 660         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 661                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 662                 break;
 663         case IEEE80211_AMPDU_TX_OPERATIONAL:
 664                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 665                 break;
 666         default:
 667                 WARN_ON_ONCE(1);
 668                 ret = -EINVAL;
 669                 break;
 670         }
 671         mutex_unlock(&mvm->mutex);
 672
 673         /*
 674          * If the tid is marked as started, we won't use it for offloaded
 675          * traffic on the next D0i3 entry. It's safe to unref.
 676          */
 677         if (tx_agg_ref)
 678                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 679
 680         return ret;
 681 }
 682
 683 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 684                                      struct ieee80211_vif *vif)
 685 {
 686         struct iwl_mvm *mvm = data;
 687         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 688
 689         mvmvif->uploaded = false;
 690         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 691
 692         /* does this make sense at all? */
 693         mvmvif->color++;
 694
 695         spin_lock_bh(&mvm->time_event_lock);
 696         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 697         spin_unlock_bh(&mvm->time_event_lock);
 698
 699         mvmvif->phy_ctxt = NULL;
 700         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 701 }
 702
 703 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 704                                      const void *data, size_t datalen)
 705 {
 706         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 707         ssize_t bytes_read;
 708         ssize_t bytes_read_trans;
 709
 710         if (offset < dump_ptrs->op_mode_len) {
 711                 bytes_read = min_t(ssize_t, count,
 712                                    dump_ptrs->op_mode_len - offset);
 713                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 714                        bytes_read);
 715                 offset += bytes_read;
 716                 count -= bytes_read;
 717
 718                 if (count == 0)
 719                         return bytes_read;
 720         } else {
 721                 bytes_read = 0;
 722         }
 723
 724         if (!dump_ptrs->trans_ptr)
 725                 return bytes_read;
 726
 727         offset -= dump_ptrs->op_mode_len;
 728         bytes_read_trans = min_t(ssize_t, count,
 729                                  dump_ptrs->trans_ptr->len - offset);
 730         memcpy(buffer + bytes_read,
 731                (u8 *)dump_ptrs->trans_ptr->data + offset,
 732                bytes_read_trans);
 733
 734         return bytes_read + bytes_read_trans;
 735 }
 736
 737 static void iwl_mvm_free_coredump(const void *data)
 738 {
 739         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 740
 741         vfree(fw_error_dump->op_mode_ptr);
 742         vfree(fw_error_dump->trans_ptr);
 743         kfree(fw_error_dump);
 744 }
 745
 746 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 747 {
 748         struct iwl_fw_error_dump_file *dump_file;
 749         struct iwl_fw_error_dump_data *dump_data;
 750         struct iwl_fw_error_dump_info *dump_info;
 751         struct iwl_mvm_dump_ptrs *fw_error_dump;
 752         const struct fw_img *img;
 753         u32 sram_len, sram_ofs;
 754         u32 file_len, rxf_len;
 755         unsigned long flags;
 756         int reg_val;
 757
 758         lockdep_assert_held(&mvm->mutex);
 759
 760         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 761         if (!fw_error_dump)
 762                 return;
 763
 764         img = &mvm->fw->img[mvm->cur_ucode];
 765         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 766         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 767
 768         /* reading buffer size */
 769         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 770         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 771
 772         /* the register holds the value divided by 128 */
 773         rxf_len = rxf_len << 7;
 774
 775         file_len = sizeof(*dump_file) +
 776                    sizeof(*dump_data) * 3 +
 777                    sram_len +
 778                    rxf_len +
 779                    sizeof(*dump_info);
 780
 781         dump_file = vzalloc(file_len);
 782         if (!dump_file) {
 783                 kfree(fw_error_dump);
 784                 return;
 785         }
 786
 787         fw_error_dump->op_mode_ptr = dump_file;
 788
 789         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 790         dump_data = (void *)dump_file->data;
 791
 792         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 793         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 794         dump_info = (void *) dump_data->data;
 795         dump_info->device_family =
 796                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 797                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 798                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 799         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 800                sizeof(dump_info->fw_human_readable));
 801         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 802                 sizeof(dump_info->dev_human_readable));
 803         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 804                 sizeof(dump_info->bus_human_readable));
 805
 806         dump_data = iwl_fw_error_next_data(dump_data);
 807         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 808         dump_data->len = cpu_to_le32(rxf_len);
 809
 810         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 811                 u32 *rxf = (void *)dump_data->data;
 812                 int i;
 813
 814                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 815                         iwl_trans_write_prph(mvm->trans,
 816                                              RXF_LD_FENCE_OFFSET_ADDR,
 817                                              i * sizeof(u32));
 818                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 819                                                      RXF_FIFO_RD_FENCE_ADDR);
 820                 }
 821                 iwl_trans_release_nic_access(mvm->trans, &flags);
 822         }
 823
 824         dump_data = iwl_fw_error_next_data(dump_data);
 825         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 826         dump_data->len = cpu_to_le32(sram_len);
 827         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 828                                  sram_len);
 829
 830         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 831         fw_error_dump->op_mode_len = file_len;
 832         if (fw_error_dump->trans_ptr)
 833                 file_len += fw_error_dump->trans_ptr->len;
 834         dump_file->file_len = cpu_to_le32(file_len);
 835
 836         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 837                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 838 }
 839
 840 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 841 {
 842         /* clear the D3 reconfig, we only need it to avoid dumping a
 843          * firmware coredump on reconfiguration, we shouldn't do that
 844          * on D3->D0 transition
 845          */
 846         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
 847                 iwl_mvm_fw_error_dump(mvm);
 848
 849         iwl_trans_stop_device(mvm->trans);
 850
 851         mvm->scan_status = IWL_MVM_SCAN_NONE;
 852         mvm->ps_disabled = false;
 853         mvm->calibrating = false;
 854
 855         /* just in case one was running */
 856         ieee80211_remain_on_channel_expired(mvm->hw);
 857
 858         ieee80211_iterate_active_interfaces_atomic(
 859                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 860                 iwl_mvm_cleanup_iterator, mvm);
 861
 862         mvm->p2p_device_vif = NULL;
 863         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 864
 865         iwl_mvm_reset_phy_ctxts(mvm);
 866         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 867         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 868         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 869         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 870         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 871         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 872         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 873         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 874
 875         ieee80211_wake_queues(mvm->hw);
 876
 877         /* cleanup all stale references (scan, roc), but keep the
 878          * ucode_down ref until reconfig is complete */
 879         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 880
 881         /* clear any stale d0i3 state */
 882         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 883
 884         mvm->vif_count = 0;
 885         mvm->rx_ba_sessions = 0;
 886 }
 887
 888 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 889 {
 890         int ret;
 891
 892         lockdep_assert_held(&mvm->mutex);
 893
 894         /* Clean up some internal and mac80211 state on restart */
 895         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 896                 iwl_mvm_restart_cleanup(mvm);
 897
 898         ret = iwl_mvm_up(mvm);
 899
 900         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 901                 /* Something went wrong - we need to finish some cleanup
 902                  * that normally iwl_mvm_mac_restart_complete() below
 903                  * would do.
 904                  */
 905                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 906                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 907         }
 908
 909         return ret;
 910 }
 911
 912 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 913 {
 914         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 915         int ret;
 916
 917         mutex_lock(&mvm->mutex);
 918         ret = __iwl_mvm_mac_start(mvm);
 919         mutex_unlock(&mvm->mutex);
 920
 921         return ret;
 922 }
 923
 924 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 925 {
 926         int ret;
 927
 928         mutex_lock(&mvm->mutex);
 929
 930         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 931         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 932         ret = iwl_mvm_update_quotas(mvm, NULL);
 933         if (ret)
 934                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 935                         ret);
 936
 937         /* allow transport/FW low power modes */
 938         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 939
 940         mutex_unlock(&mvm->mutex);
 941 }
 942
 943 static void
 944 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 945                               enum ieee80211_reconfig_type reconfig_type)
 946 {
 947         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 948
 949         switch (reconfig_type) {
 950         case IEEE80211_RECONFIG_TYPE_RESTART:
 951                 iwl_mvm_restart_complete(mvm);
 952                 break;
 953         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 954                 break;
 955         }
 956 }
 957
 958 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 959 {
 960         lockdep_assert_held(&mvm->mutex);
 961
 962         /* disallow low power states when the FW is down */
 963         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 964
 965         /* async_handlers_wk is now blocked */
 966
 967         /*
 968          * The work item could be running or queued if the
 969          * ROC time event stops just as we get here.
 970          */
 971         cancel_work_sync(&mvm->roc_done_wk);
 972
 973         iwl_trans_stop_device(mvm->trans);
 974
 975         iwl_mvm_async_handlers_purge(mvm);
 976         /* async_handlers_list is empty and will stay empty: HW is stopped */
 977
 978         /* the fw is stopped, the aux sta is dead: clean up driver state */
 979         iwl_mvm_del_aux_sta(mvm);
 980
 981         mvm->ucode_loaded = false;
 982 }
 983
 984 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 985 {
 986         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 987
 988         flush_work(&mvm->d0i3_exit_work);
 989         flush_work(&mvm->async_handlers_wk);
 990         flush_work(&mvm->fw_error_dump_wk);
 991
 992         mutex_lock(&mvm->mutex);
 993         __iwl_mvm_mac_stop(mvm);
 994         mutex_unlock(&mvm->mutex);
 995
 996         /*
 997          * The worker might have been waiting for the mutex, let it run and
 998          * discover that its list is now empty.
 999          */
1000         cancel_work_sync(&mvm->async_handlers_wk);
1001 }
1002
1003 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1004 {
1005         u16 i;
1006
1007         lockdep_assert_held(&mvm->mutex);
1008
1009         for (i = 0; i < NUM_PHY_CTX; i++)
1010                 if (!mvm->phy_ctxts[i].ref)
1011                         return &mvm->phy_ctxts[i];
1012
1013         IWL_ERR(mvm, "No available PHY context\n");
1014         return NULL;
1015 }
1016
1017 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1018                                 s8 tx_power)
1019 {
1020         /* FW is in charge of regulatory enforcement */
1021         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1022                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1023                 .pwr_restriction = cpu_to_le16(tx_power),
1024         };
1025
1026         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1027                                     sizeof(reduce_txpwr_cmd),
1028                                     &reduce_txpwr_cmd);
1029 }
1030
1031 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1032                                      struct ieee80211_vif *vif)
1033 {
1034         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1035         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1036         int ret;
1037
1038         /*
1039          * make sure D0i3 exit is completed, otherwise a target access
1040          * during tx queue configuration could be done when still in
1041          * D0i3 state.
1042          */
1043         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1044         if (ret)
1045                 return ret;
1046
1047         /*
1048          * Not much to do here. The stack will not allow interface
1049          * types or combinations that we didn't advertise, so we
1050          * don't really have to check the types.
1051          */
1052
1053         mutex_lock(&mvm->mutex);
1054
1055         /* Allocate resources for the MAC context, and add it to the fw  */
1056         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1057         if (ret)
1058                 goto out_unlock;
1059
1060         /* Counting number of interfaces is needed for legacy PM */
1061         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1062                 mvm->vif_count++;
1063
1064         /*
1065          * The AP binding flow can be done only after the beacon
1066          * template is configured (which happens only in the mac80211
1067          * start_ap() flow), and adding the broadcast station can happen
1068          * only after the binding.
1069          * In addition, since modifying the MAC before adding a bcast
1070          * station is not allowed by the FW, delay the adding of MAC context to
1071          * the point where we can also add the bcast station.
1072          * In short: there's not much we can do at this point, other than
1073          * allocating resources :)
1074          */
1075         if (vif->type == NL80211_IFTYPE_AP ||
1076             vif->type == NL80211_IFTYPE_ADHOC) {
1077                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1078                 if (ret) {
1079                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1080                         goto out_release;
1081                 }
1082
1083                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1084                 goto out_unlock;
1085         }
1086
1087         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1088         if (ret)
1089                 goto out_release;
1090
1091         ret = iwl_mvm_power_update_mac(mvm);
1092         if (ret)
1093                 goto out_release;
1094
1095         /* beacon filtering */
1096         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1097         if (ret)
1098                 goto out_remove_mac;
1099
1100         if (!mvm->bf_allowed_vif &&
1101             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1102                 mvm->bf_allowed_vif = mvmvif;
1103                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1104                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1105         }
1106
1107         /*
1108          * P2P_DEVICE interface does not have a channel context assigned to it,
1109          * so a dedicated PHY context is allocated to it and the corresponding
1110          * MAC context is bound to it at this stage.
1111          */
1112         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1113
1114                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1115                 if (!mvmvif->phy_ctxt) {
1116                         ret = -ENOSPC;
1117                         goto out_free_bf;
1118                 }
1119
1120                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1121                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1122                 if (ret)
1123                         goto out_unref_phy;
1124
1125                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1126                 if (ret)
1127                         goto out_unbind;
1128
1129                 /* Save a pointer to p2p device vif, so it can later be used to
1130                  * update the p2p device MAC when a GO is started/stopped */
1131                 mvm->p2p_device_vif = vif;
1132         }
1133
1134         iwl_mvm_vif_dbgfs_register(mvm, vif);
1135         goto out_unlock;
1136
1137  out_unbind:
1138         iwl_mvm_binding_remove_vif(mvm, vif);
1139  out_unref_phy:
1140         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1141  out_free_bf:
1142         if (mvm->bf_allowed_vif == mvmvif) {
1143                 mvm->bf_allowed_vif = NULL;
1144                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1145                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1146         }
1147  out_remove_mac:
1148         mvmvif->phy_ctxt = NULL;
1149         iwl_mvm_mac_ctxt_remove(mvm, vif);
1150  out_release:
1151         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1152                 mvm->vif_count--;
1153
1154         iwl_mvm_mac_ctxt_release(mvm, vif);
1155  out_unlock:
1156         mutex_unlock(&mvm->mutex);
1157
1158         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1159
1160         return ret;
1161 }
1162
1163 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1164                                         struct ieee80211_vif *vif)
1165 {
1166         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1167
1168         if (tfd_msk) {
1169                 mutex_lock(&mvm->mutex);
1170                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1171                 mutex_unlock(&mvm->mutex);
1172         }
1173
1174         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1175                 /*
1176                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1177                  * We assume here that all the packets sent to the OFFCHANNEL
1178                  * queue are sent in ROC session.
1179                  */
1180                 flush_work(&mvm->roc_done_wk);
1181         } else {
1182                 /*
1183                  * By now, all the AC queues are empty. The AGG queues are
1184                  * empty too. We already got all the Tx responses for all the
1185                  * packets in the queues. The drain work can have been
1186                  * triggered. Flush it.
1187                  */
1188                 flush_work(&mvm->sta_drained_wk);
1189         }
1190 }
1191
1192 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1193                                          struct ieee80211_vif *vif)
1194 {
1195         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1196         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1197
1198         iwl_mvm_prepare_mac_removal(mvm, vif);
1199
1200         mutex_lock(&mvm->mutex);
1201
1202         if (mvm->bf_allowed_vif == mvmvif) {
1203                 mvm->bf_allowed_vif = NULL;
1204                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1205                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1206         }
1207
1208         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1209
1210         /*
1211          * For AP/GO interface, the tear down of the resources allocated to the
1212          * interface is be handled as part of the stop_ap flow.
1213          */
1214         if (vif->type == NL80211_IFTYPE_AP ||
1215             vif->type == NL80211_IFTYPE_ADHOC) {
1216 #ifdef CONFIG_NL80211_TESTMODE
1217                 if (vif == mvm->noa_vif) {
1218                         mvm->noa_vif = NULL;
1219                         mvm->noa_duration = 0;
1220                 }
1221 #endif
1222                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1223                 goto out_release;
1224         }
1225
1226         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1227                 mvm->p2p_device_vif = NULL;
1228                 iwl_mvm_rm_bcast_sta(mvm, vif);
1229                 iwl_mvm_binding_remove_vif(mvm, vif);
1230                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1231                 mvmvif->phy_ctxt = NULL;
1232         }
1233
1234         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1235                 mvm->vif_count--;
1236
1237         iwl_mvm_power_update_mac(mvm);
1238         iwl_mvm_mac_ctxt_remove(mvm, vif);
1239
1240 out_release:
1241         iwl_mvm_mac_ctxt_release(mvm, vif);
1242         mutex_unlock(&mvm->mutex);
1243 }
1244
1245 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1246 {
1247         return 0;
1248 }
1249
1250 struct iwl_mvm_mc_iter_data {
1251         struct iwl_mvm *mvm;
1252         int port_id;
1253 };
1254
1255 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1256                                       struct ieee80211_vif *vif)
1257 {
1258         struct iwl_mvm_mc_iter_data *data = _data;
1259         struct iwl_mvm *mvm = data->mvm;
1260         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1261         int ret, len;
1262
1263         /* if we don't have free ports, mcast frames will be dropped */
1264         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1265                 return;
1266
1267         if (vif->type != NL80211_IFTYPE_STATION ||
1268             !vif->bss_conf.assoc)
1269                 return;
1270
1271         cmd->port_id = data->port_id++;
1272         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1273         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1274
1275         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1276         if (ret)
1277                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1278 }
1279
1280 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1281 {
1282         struct iwl_mvm_mc_iter_data iter_data = {
1283                 .mvm = mvm,
1284         };
1285
1286         lockdep_assert_held(&mvm->mutex);
1287
1288         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1289                 return;
1290
1291         ieee80211_iterate_active_interfaces_atomic(
1292                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1293                 iwl_mvm_mc_iface_iterator, &iter_data);
1294 }
1295
1296 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1297                                      struct netdev_hw_addr_list *mc_list)
1298 {
1299         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1300         struct iwl_mcast_filter_cmd *cmd;
1301         struct netdev_hw_addr *addr;
1302         int addr_count;
1303         bool pass_all;
1304         int len;
1305
1306         addr_count = netdev_hw_addr_list_count(mc_list);
1307         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1308                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1309         if (pass_all)
1310                 addr_count = 0;
1311
1312         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1313         cmd = kzalloc(len, GFP_ATOMIC);
1314         if (!cmd)
1315                 return 0;
1316
1317         if (pass_all) {
1318                 cmd->pass_all = 1;
1319                 return (u64)(unsigned long)cmd;
1320         }
1321
1322         netdev_hw_addr_list_for_each(addr, mc_list) {
1323                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1324                                    cmd->count, addr->addr);
1325                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1326                        addr->addr, ETH_ALEN);
1327                 cmd->count++;
1328         }
1329
1330         return (u64)(unsigned long)cmd;
1331 }
1332
1333 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1334                                      unsigned int changed_flags,
1335                                      unsigned int *total_flags,
1336                                      u64 multicast)
1337 {
1338         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1339         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1340
1341         mutex_lock(&mvm->mutex);
1342
1343         /* replace previous configuration */
1344         kfree(mvm->mcast_filter_cmd);
1345         mvm->mcast_filter_cmd = cmd;
1346
1347         if (!cmd)
1348                 goto out;
1349
1350         iwl_mvm_recalc_multicast(mvm);
1351 out:
1352         mutex_unlock(&mvm->mutex);
1353         *total_flags = 0;
1354 }
1355
1356 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1357 struct iwl_bcast_iter_data {
1358         struct iwl_mvm *mvm;
1359         struct iwl_bcast_filter_cmd *cmd;
1360         u8 current_filter;
1361 };
1362
1363 static void
1364 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1365                          const struct iwl_fw_bcast_filter *in_filter,
1366                          struct iwl_fw_bcast_filter *out_filter)
1367 {
1368         struct iwl_fw_bcast_filter_attr *attr;
1369         int i;
1370
1371         memcpy(out_filter, in_filter, sizeof(*out_filter));
1372
1373         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1374                 attr = &out_filter->attrs[i];
1375
1376                 if (!attr->mask)
1377                         break;
1378
1379                 switch (attr->reserved1) {
1380                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1381                         if (vif->bss_conf.arp_addr_cnt != 1) {
1382                                 attr->mask = 0;
1383                                 continue;
1384                         }
1385
1386                         attr->val = vif->bss_conf.arp_addr_list[0];
1387                         break;
1388                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1389                         attr->val = *(__be32 *)&vif->addr[2];
1390                         break;
1391                 default:
1392                         break;
1393                 }
1394                 attr->reserved1 = 0;
1395                 out_filter->num_attrs++;
1396         }
1397 }
1398
1399 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1400                                           struct ieee80211_vif *vif)
1401 {
1402         struct iwl_bcast_iter_data *data = _data;
1403         struct iwl_mvm *mvm = data->mvm;
1404         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1405         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1406         struct iwl_fw_bcast_mac *bcast_mac;
1407         int i;
1408
1409         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1410                 return;
1411
1412         bcast_mac = &cmd->macs[mvmvif->id];
1413
1414         /*
1415          * enable filtering only for associated stations, but not for P2P
1416          * Clients
1417          */
1418         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1419             !vif->bss_conf.assoc)
1420                 return;
1421
1422         bcast_mac->default_discard = 1;
1423
1424         /* copy all configured filters */
1425         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1426                 /*
1427                  * Make sure we don't exceed our filters limit.
1428                  * if there is still a valid filter to be configured,
1429                  * be on the safe side and just allow bcast for this mac.
1430                  */
1431                 if (WARN_ON_ONCE(data->current_filter >=
1432                                  ARRAY_SIZE(cmd->filters))) {
1433                         bcast_mac->default_discard = 0;
1434                         bcast_mac->attached_filters = 0;
1435                         break;
1436                 }
1437
1438                 iwl_mvm_set_bcast_filter(vif,
1439                                          &mvm->bcast_filters[i],
1440                                          &cmd->filters[data->current_filter]);
1441
1442                 /* skip current filter if it contains no attributes */
1443                 if (!cmd->filters[data->current_filter].num_attrs)
1444                         continue;
1445
1446                 /* attach the filter to current mac */
1447                 bcast_mac->attached_filters |=
1448                                 cpu_to_le16(BIT(data->current_filter));
1449
1450                 data->current_filter++;
1451         }
1452 }
1453
1454 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1455                                     struct iwl_bcast_filter_cmd *cmd)
1456 {
1457         struct iwl_bcast_iter_data iter_data = {
1458                 .mvm = mvm,
1459                 .cmd = cmd,
1460         };
1461
1462         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1463                 return false;
1464
1465         memset(cmd, 0, sizeof(*cmd));
1466         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1467         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1468
1469 #ifdef CONFIG_IWLWIFI_DEBUGFS
1470         /* use debugfs filters/macs if override is configured */
1471         if (mvm->dbgfs_bcast_filtering.override) {
1472                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1473                        sizeof(cmd->filters));
1474                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1475                        sizeof(cmd->macs));
1476                 return true;
1477         }
1478 #endif
1479
1480         /* if no filters are configured, do nothing */
1481         if (!mvm->bcast_filters)
1482                 return false;
1483
1484         /* configure and attach these filters for each associated sta vif */
1485         ieee80211_iterate_active_interfaces(
1486                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1487                 iwl_mvm_bcast_filter_iterator, &iter_data);
1488
1489         return true;
1490 }
1491 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1492                                           struct ieee80211_vif *vif)
1493 {
1494         struct iwl_bcast_filter_cmd cmd;
1495
1496         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1497                 return 0;
1498
1499         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1500                 return 0;
1501
1502         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1503                                     sizeof(cmd), &cmd);
1504 }
1505 #else
1506 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1507                                                  struct ieee80211_vif *vif)
1508 {
1509         return 0;
1510 }
1511 #endif
1512
1513 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1514                                              struct ieee80211_vif *vif,
1515                                              struct ieee80211_bss_conf *bss_conf,
1516                                              u32 changes)
1517 {
1518         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1519         int ret;
1520
1521         /*
1522          * Re-calculate the tsf id, as the master-slave relations depend on the
1523          * beacon interval, which was not known when the station interface was
1524          * added.
1525          */
1526         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1527                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1528
1529         /*
1530          * If we're not associated yet, take the (new) BSSID before associating
1531          * so the firmware knows. If we're already associated, then use the old
1532          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1533          * branch for disassociation below.
1534          */
1535         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1536                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1537
1538         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1539         if (ret)
1540                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1541
1542         /* after sending it once, adopt mac80211 data */
1543         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1544         mvmvif->associated = bss_conf->assoc;
1545
1546         if (changes & BSS_CHANGED_ASSOC) {
1547                 if (bss_conf->assoc) {
1548                         /* add quota for this interface */
1549                         ret = iwl_mvm_update_quotas(mvm, NULL);
1550                         if (ret) {
1551                                 IWL_ERR(mvm, "failed to update quotas\n");
1552                                 return;
1553                         }
1554
1555                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1556                                      &mvm->status)) {
1557                                 /*
1558                                  * If we're restarting then the firmware will
1559                                  * obviously have lost synchronisation with
1560                                  * the AP. It will attempt to synchronise by
1561                                  * itself, but we can make it more reliable by
1562                                  * scheduling a session protection time event.
1563                                  *
1564                                  * The firmware needs to receive a beacon to
1565                                  * catch up with synchronisation, use 110% of
1566                                  * the beacon interval.
1567                                  *
1568                                  * Set a large maximum delay to allow for more
1569                                  * than a single interface.
1570                                  */
1571                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1572                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1573                                                         5 * dur, false);
1574                         }
1575
1576                         iwl_mvm_sf_update(mvm, vif, false);
1577                         iwl_mvm_power_vif_assoc(mvm, vif);
1578                         if (vif->p2p) {
1579                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1580                                 iwl_mvm_update_smps(mvm, vif,
1581                                                     IWL_MVM_SMPS_REQ_PROT,
1582                                                     IEEE80211_SMPS_DYNAMIC);
1583                         }
1584                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1585                         /*
1586                          * If update fails - SF might be running in associated
1587                          * mode while disassociated - which is forbidden.
1588                          */
1589                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1590                                   "Failed to update SF upon disassociation\n");
1591
1592                         /* remove AP station now that the MAC is unassoc */
1593                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1594                         if (ret)
1595                                 IWL_ERR(mvm, "failed to remove AP station\n");
1596
1597                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1598                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1599                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1600                         /* remove quota for this interface */
1601                         ret = iwl_mvm_update_quotas(mvm, NULL);
1602                         if (ret)
1603                                 IWL_ERR(mvm, "failed to update quotas\n");
1604
1605                         if (vif->p2p)
1606                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1607
1608                         /* this will take the cleared BSSID from bss_conf */
1609                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1610                         if (ret)
1611                                 IWL_ERR(mvm,
1612                                         "failed to update MAC %pM (clear after unassoc)\n",
1613                                         vif->addr);
1614                 }
1615
1616                 iwl_mvm_recalc_multicast(mvm);
1617                 iwl_mvm_configure_bcast_filter(mvm, vif);
1618
1619                 /* reset rssi values */
1620                 mvmvif->bf_data.ave_beacon_signal = 0;
1621
1622                 iwl_mvm_bt_coex_vif_change(mvm);
1623                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1624                                     IEEE80211_SMPS_AUTOMATIC);
1625         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1626                 /*
1627                  * We received a beacon _after_ association so
1628                  * remove the session protection.
1629                  */
1630                 iwl_mvm_remove_time_event(mvm, mvmvif,
1631                                           &mvmvif->time_event_data);
1632         }
1633
1634         if (changes & BSS_CHANGED_BEACON_INFO) {
1635                 iwl_mvm_sf_update(mvm, vif, false);
1636                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1637         }
1638
1639         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1640                 ret = iwl_mvm_power_update_mac(mvm);
1641                 if (ret)
1642                         IWL_ERR(mvm, "failed to update power mode\n");
1643         }
1644
1645         if (changes & BSS_CHANGED_TXPOWER) {
1646                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1647                                 bss_conf->txpower);
1648                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1649         }
1650
1651         if (changes & BSS_CHANGED_CQM) {
1652                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1653                 /* reset cqm events tracking */
1654                 mvmvif->bf_data.last_cqm_event = 0;
1655                 if (mvmvif->bf_data.bf_enabled) {
1656                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1657                         if (ret)
1658                                 IWL_ERR(mvm,
1659                                         "failed to update CQM thresholds\n");
1660                 }
1661         }
1662
1663         if (changes & BSS_CHANGED_ARP_FILTER) {
1664                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1665                 iwl_mvm_configure_bcast_filter(mvm, vif);
1666         }
1667 }
1668
1669 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1670                                  struct ieee80211_vif *vif)
1671 {
1672         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1673         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1674         int ret;
1675
1676         /*
1677          * iwl_mvm_mac_ctxt_add() might read directly from the device
1678          * (the system time), so make sure it is available.
1679          */
1680         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1681         if (ret)
1682                 return ret;
1683
1684         mutex_lock(&mvm->mutex);
1685
1686         /* Send the beacon template */
1687         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1688         if (ret)
1689                 goto out_unlock;
1690
1691         /*
1692          * Re-calculate the tsf id, as the master-slave relations depend on the
1693          * beacon interval, which was not known when the AP interface was added.
1694          */
1695         if (vif->type == NL80211_IFTYPE_AP)
1696                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1697
1698         /* Add the mac context */
1699         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1700         if (ret)
1701                 goto out_unlock;
1702
1703         /* Perform the binding */
1704         ret = iwl_mvm_binding_add_vif(mvm, vif);
1705         if (ret)
1706                 goto out_remove;
1707
1708         /* Send the bcast station. At this stage the TBTT and DTIM time events
1709          * are added and applied to the scheduler */
1710         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1711         if (ret)
1712                 goto out_unbind;
1713
1714         /* must be set before quota calculations */
1715         mvmvif->ap_ibss_active = true;
1716
1717         /* power updated needs to be done before quotas */
1718         iwl_mvm_power_update_mac(mvm);
1719
1720         ret = iwl_mvm_update_quotas(mvm, NULL);
1721         if (ret)
1722                 goto out_quota_failed;
1723
1724         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1725         if (vif->p2p && mvm->p2p_device_vif)
1726                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1727
1728         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1729
1730         iwl_mvm_bt_coex_vif_change(mvm);
1731
1732         /* we don't support TDLS during DCM */
1733         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1734                 iwl_mvm_teardown_tdls_peers(mvm);
1735
1736         mutex_unlock(&mvm->mutex);
1737         return 0;
1738
1739 out_quota_failed:
1740         iwl_mvm_power_update_mac(mvm);
1741         mvmvif->ap_ibss_active = false;
1742         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1743 out_unbind:
1744         iwl_mvm_binding_remove_vif(mvm, vif);
1745 out_remove:
1746         iwl_mvm_mac_ctxt_remove(mvm, vif);
1747 out_unlock:
1748         mutex_unlock(&mvm->mutex);
1749         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1750         return ret;
1751 }
1752
1753 static void iwl_mvm_stop_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
1759         iwl_mvm_prepare_mac_removal(mvm, vif);
1760
1761         mutex_lock(&mvm->mutex);
1762
1763         /* Handle AP stop while in CSA */
1764         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1765                 iwl_mvm_remove_time_event(mvm, mvmvif,
1766                                           &mvmvif->time_event_data);
1767                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1768         }
1769
1770         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1771                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1772                 mvm->csa_tx_block_bcn_timeout = 0;
1773         }
1774
1775         mvmvif->ap_ibss_active = false;
1776         mvm->ap_last_beacon_gp2 = 0;
1777
1778         iwl_mvm_bt_coex_vif_change(mvm);
1779
1780         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1781
1782         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1783         if (vif->p2p && mvm->p2p_device_vif)
1784                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1785
1786         iwl_mvm_update_quotas(mvm, NULL);
1787         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1788         iwl_mvm_binding_remove_vif(mvm, vif);
1789
1790         iwl_mvm_power_update_mac(mvm);
1791
1792         iwl_mvm_mac_ctxt_remove(mvm, vif);
1793
1794         mutex_unlock(&mvm->mutex);
1795 }
1796
1797 static void
1798 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1799                                  struct ieee80211_vif *vif,
1800                                  struct ieee80211_bss_conf *bss_conf,
1801                                  u32 changes)
1802 {
1803         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1804
1805         /* Changes will be applied when the AP/IBSS is started */
1806         if (!mvmvif->ap_ibss_active)
1807                 return;
1808
1809         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1810                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1811             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1812                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1813
1814         /* Need to send a new beacon template to the FW */
1815         if (changes & BSS_CHANGED_BEACON &&
1816             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1817                 IWL_WARN(mvm, "Failed updating beacon data\n");
1818
1819         if (changes & BSS_CHANGED_TXPOWER) {
1820                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1821                                 bss_conf->txpower);
1822                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1823         }
1824
1825 }
1826
1827 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1828                                      struct ieee80211_vif *vif,
1829                                      struct ieee80211_bss_conf *bss_conf,
1830                                      u32 changes)
1831 {
1832         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1833
1834         /*
1835          * iwl_mvm_bss_info_changed_station() might call
1836          * iwl_mvm_protect_session(), which reads directly from
1837          * the device (the system time), so make sure it is available.
1838          */
1839         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1840                 return;
1841
1842         mutex_lock(&mvm->mutex);
1843
1844         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1845                 iwl_mvm_scan_offload_stop(mvm, true);
1846
1847         switch (vif->type) {
1848         case NL80211_IFTYPE_STATION:
1849                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1850                 break;
1851         case NL80211_IFTYPE_AP:
1852         case NL80211_IFTYPE_ADHOC:
1853                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1854                 break;
1855         default:
1856                 /* shouldn't happen */
1857                 WARN_ON_ONCE(1);
1858         }
1859
1860         mutex_unlock(&mvm->mutex);
1861         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1862 }
1863
1864 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1865                                           enum iwl_scan_status scan_type)
1866 {
1867         int ret;
1868         bool wait_for_handlers = false;
1869
1870         mutex_lock(&mvm->mutex);
1871
1872         if (mvm->scan_status != scan_type) {
1873                 ret = 0;
1874                 /* make sure there are no pending notifications */
1875                 wait_for_handlers = true;
1876                 goto out;
1877         }
1878
1879         switch (scan_type) {
1880         case IWL_MVM_SCAN_SCHED:
1881                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1882                 break;
1883         case IWL_MVM_SCAN_OS:
1884                 ret = iwl_mvm_cancel_scan(mvm);
1885                 break;
1886         case IWL_MVM_SCAN_NONE:
1887         default:
1888                 WARN_ON_ONCE(1);
1889                 ret = -EINVAL;
1890                 break;
1891         }
1892         if (ret)
1893                 goto out;
1894
1895         wait_for_handlers = true;
1896 out:
1897         mutex_unlock(&mvm->mutex);
1898
1899         /* make sure we consume the completion notification */
1900         if (wait_for_handlers)
1901                 iwl_mvm_wait_for_async_handlers(mvm);
1902
1903         return ret;
1904 }
1905 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1906                                struct ieee80211_vif *vif,
1907                                struct ieee80211_scan_request *hw_req)
1908 {
1909         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1910         struct cfg80211_scan_request *req = &hw_req->req;
1911         int ret;
1912
1913         if (req->n_channels == 0 ||
1914             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1915                 return -EINVAL;
1916
1917         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1918         if (ret)
1919                 return ret;
1920
1921         mutex_lock(&mvm->mutex);
1922
1923         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1924                 ret = -EBUSY;
1925                 goto out;
1926         }
1927
1928         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1929
1930         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1931                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1932         else
1933                 ret = iwl_mvm_scan_request(mvm, vif, req);
1934
1935         if (ret)
1936                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1937 out:
1938         mutex_unlock(&mvm->mutex);
1939         return ret;
1940 }
1941
1942 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1943                                        struct ieee80211_vif *vif)
1944 {
1945         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1946
1947         mutex_lock(&mvm->mutex);
1948
1949         iwl_mvm_cancel_scan(mvm);
1950
1951         mutex_unlock(&mvm->mutex);
1952 }
1953
1954 static void
1955 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1956                                   struct ieee80211_sta *sta, u16 tids,
1957                                   int num_frames,
1958                                   enum ieee80211_frame_release_type reason,
1959                                   bool more_data)
1960 {
1961         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1962
1963         /* Called when we need to transmit (a) frame(s) from mac80211 */
1964
1965         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1966                                           tids, more_data, false);
1967 }
1968
1969 static void
1970 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1971                                     struct ieee80211_sta *sta, u16 tids,
1972                                     int num_frames,
1973                                     enum ieee80211_frame_release_type reason,
1974                                     bool more_data)
1975 {
1976         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1977
1978         /* Called when we need to transmit (a) frame(s) from agg queue */
1979
1980         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1981                                           tids, more_data, true);
1982 }
1983
1984 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1985                                    struct ieee80211_vif *vif,
1986                                    enum sta_notify_cmd cmd,
1987                                    struct ieee80211_sta *sta)
1988 {
1989         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1990         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1991         int tid;
1992
1993         switch (cmd) {
1994         case STA_NOTIFY_SLEEP:
1995                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1996                         ieee80211_sta_block_awake(hw, sta, true);
1997                 spin_lock_bh(&mvmsta->lock);
1998                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1999                         struct iwl_mvm_tid_data *tid_data;
2000
2001                         tid_data = &mvmsta->tid_data[tid];
2002                         if (tid_data->state != IWL_AGG_ON &&
2003                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2004                                 continue;
2005                         if (iwl_mvm_tid_queued(tid_data) == 0)
2006                                 continue;
2007                         ieee80211_sta_set_buffered(sta, tid, true);
2008                 }
2009                 spin_unlock_bh(&mvmsta->lock);
2010                 /*
2011                  * The fw updates the STA to be asleep. Tx packets on the Tx
2012                  * queues to this station will not be transmitted. The fw will
2013                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2014                  */
2015                 break;
2016         case STA_NOTIFY_AWAKE:
2017                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2018                         break;
2019                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2020                 break;
2021         default:
2022                 break;
2023         }
2024 }
2025
2026 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2027                                        struct ieee80211_vif *vif,
2028                                        struct ieee80211_sta *sta)
2029 {
2030         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2031         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2032
2033         /*
2034          * This is called before mac80211 does RCU synchronisation,
2035          * so here we already invalidate our internal RCU-protected
2036          * station pointer. The rest of the code will thus no longer
2037          * be able to find the station this way, and we don't rely
2038          * on further RCU synchronisation after the sta_state()
2039          * callback deleted the station.
2040          */
2041         mutex_lock(&mvm->mutex);
2042         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2043                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2044                                    ERR_PTR(-ENOENT));
2045         mutex_unlock(&mvm->mutex);
2046 }
2047
2048 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2049                                  struct ieee80211_vif *vif,
2050                                  struct ieee80211_sta *sta,
2051                                  enum ieee80211_sta_state old_state,
2052                                  enum ieee80211_sta_state new_state)
2053 {
2054         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2055         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2056         int ret;
2057
2058         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2059                            sta->addr, old_state, new_state);
2060
2061         /* this would be a mac80211 bug ... but don't crash */
2062         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2063                 return -EINVAL;
2064
2065         /* if a STA is being removed, reuse its ID */
2066         flush_work(&mvm->sta_drained_wk);
2067
2068         mutex_lock(&mvm->mutex);
2069         if (old_state == IEEE80211_STA_NOTEXIST &&
2070             new_state == IEEE80211_STA_NONE) {
2071                 /*
2072                  * Firmware bug - it'll crash if the beacon interval is less
2073                  * than 16. We can't avoid connecting at all, so refuse the
2074                  * station state change, this will cause mac80211 to abandon
2075                  * attempts to connect to this AP, and eventually wpa_s will
2076                  * blacklist the AP...
2077                  */
2078                 if (vif->type == NL80211_IFTYPE_STATION &&
2079                     vif->bss_conf.beacon_int < 16) {
2080                         IWL_ERR(mvm,
2081                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2082                                 sta->addr, vif->bss_conf.beacon_int);
2083                         ret = -EINVAL;
2084                         goto out_unlock;
2085                 }
2086
2087                 if (sta->tdls &&
2088                     (vif->p2p ||
2089                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2090                                                 IWL_MVM_TDLS_STA_COUNT ||
2091                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2092                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2093                         ret = -EBUSY;
2094                         goto out_unlock;
2095                 }
2096
2097                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2098                 if (sta->tdls && ret == 0)
2099                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2100         } else if (old_state == IEEE80211_STA_NONE &&
2101                    new_state == IEEE80211_STA_AUTH) {
2102                 /*
2103                  * EBS may be disabled due to previous failures reported by FW.
2104                  * Reset EBS status here assuming environment has been changed.
2105                  */
2106                 mvm->last_ebs_successful = true;
2107                 ret = 0;
2108         } else if (old_state == IEEE80211_STA_AUTH &&
2109                    new_state == IEEE80211_STA_ASSOC) {
2110                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2111                 if (ret == 0)
2112                         iwl_mvm_rs_rate_init(mvm, sta,
2113                                              mvmvif->phy_ctxt->channel->band,
2114                                              true);
2115         } else if (old_state == IEEE80211_STA_ASSOC &&
2116                    new_state == IEEE80211_STA_AUTHORIZED) {
2117
2118                 /* we don't support TDLS during DCM */
2119                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2120                         iwl_mvm_teardown_tdls_peers(mvm);
2121
2122                 /* enable beacon filtering */
2123                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2124                 ret = 0;
2125         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2126                    new_state == IEEE80211_STA_ASSOC) {
2127                 /* disable beacon filtering */
2128                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2129                 ret = 0;
2130         } else if (old_state == IEEE80211_STA_ASSOC &&
2131                    new_state == IEEE80211_STA_AUTH) {
2132                 ret = 0;
2133         } else if (old_state == IEEE80211_STA_AUTH &&
2134                    new_state == IEEE80211_STA_NONE) {
2135                 ret = 0;
2136         } else if (old_state == IEEE80211_STA_NONE &&
2137                    new_state == IEEE80211_STA_NOTEXIST) {
2138                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2139                 if (sta->tdls)
2140                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2141         } else {
2142                 ret = -EIO;
2143         }
2144  out_unlock:
2145         mutex_unlock(&mvm->mutex);
2146
2147         return ret;
2148 }
2149
2150 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2151 {
2152         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2153
2154         mvm->rts_threshold = value;
2155
2156         return 0;
2157 }
2158
2159 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2160                                   struct ieee80211_vif *vif,
2161                                   struct ieee80211_sta *sta, u32 changed)
2162 {
2163         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2164
2165         if (vif->type == NL80211_IFTYPE_STATION &&
2166             changed & IEEE80211_RC_NSS_CHANGED)
2167                 iwl_mvm_sf_update(mvm, vif, false);
2168 }
2169
2170 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2171                                struct ieee80211_vif *vif, u16 ac,
2172                                const struct ieee80211_tx_queue_params *params)
2173 {
2174         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2175         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2176
2177         mvmvif->queue_params[ac] = *params;
2178
2179         /*
2180          * No need to update right away, we'll get BSS_CHANGED_QOS
2181          * The exception is P2P_DEVICE interface which needs immediate update.
2182          */
2183         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2184                 int ret;
2185
2186                 mutex_lock(&mvm->mutex);
2187                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2188                 mutex_unlock(&mvm->mutex);
2189                 return ret;
2190         }
2191         return 0;
2192 }
2193
2194 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2195                                       struct ieee80211_vif *vif)
2196 {
2197         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2198         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2199                            200 + vif->bss_conf.beacon_int);
2200         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2201                                100 + vif->bss_conf.beacon_int);
2202
2203         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2204                 return;
2205
2206         /*
2207          * iwl_mvm_protect_session() reads directly from the device
2208          * (the system time), so make sure it is available.
2209          */
2210         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2211                 return;
2212
2213         mutex_lock(&mvm->mutex);
2214         /* Try really hard to protect the session and hear a beacon */
2215         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2216         mutex_unlock(&mvm->mutex);
2217
2218         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2219 }
2220
2221 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2222                                         struct ieee80211_vif *vif,
2223                                         struct cfg80211_sched_scan_request *req,
2224                                         struct ieee80211_scan_ies *ies)
2225 {
2226         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2227         int ret;
2228
2229         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2230         if (ret)
2231                 return ret;
2232
2233         mutex_lock(&mvm->mutex);
2234
2235         /* Newest FW fixes sched scan while connected on another interface */
2236         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2237                 if (!vif->bss_conf.idle) {
2238                         ret = -EBUSY;
2239                         goto out;
2240                 }
2241         } else if (!iwl_mvm_is_idle(mvm)) {
2242                 ret = -EBUSY;
2243                 goto out;
2244         }
2245
2246         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2247                 ret = -EBUSY;
2248                 goto out;
2249         }
2250
2251         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2252
2253         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2254         if (ret)
2255                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2256 out:
2257         mutex_unlock(&mvm->mutex);
2258         return ret;
2259 }
2260
2261 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2262                                        struct ieee80211_vif *vif)
2263 {
2264         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2265         int ret;
2266
2267         mutex_lock(&mvm->mutex);
2268         ret = iwl_mvm_scan_offload_stop(mvm, false);
2269         mutex_unlock(&mvm->mutex);
2270         iwl_mvm_wait_for_async_handlers(mvm);
2271
2272         return ret;
2273 }
2274
2275 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2276                                enum set_key_cmd cmd,
2277                                struct ieee80211_vif *vif,
2278                                struct ieee80211_sta *sta,
2279                                struct ieee80211_key_conf *key)
2280 {
2281         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2282         int ret;
2283
2284         if (iwlwifi_mod_params.sw_crypto) {
2285                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2286                 return -EOPNOTSUPP;
2287         }
2288
2289         switch (key->cipher) {
2290         case WLAN_CIPHER_SUITE_TKIP:
2291                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2292                 /* fall-through */
2293         case WLAN_CIPHER_SUITE_CCMP:
2294                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2295                 break;
2296         case WLAN_CIPHER_SUITE_AES_CMAC:
2297                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2298                 break;
2299         case WLAN_CIPHER_SUITE_WEP40:
2300         case WLAN_CIPHER_SUITE_WEP104:
2301                 /*
2302                  * Support for TX only, at least for now, so accept
2303                  * the key and do nothing else. Then mac80211 will
2304                  * pass it for TX but we don't have to use it for RX.
2305                  */
2306                 return 0;
2307         default:
2308                 /* currently FW supports only one optional cipher scheme */
2309                 if (hw->n_cipher_schemes &&
2310                     hw->cipher_schemes->cipher == key->cipher)
2311                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2312                 else
2313                         return -EOPNOTSUPP;
2314         }
2315
2316         mutex_lock(&mvm->mutex);
2317
2318         switch (cmd) {
2319         case SET_KEY:
2320                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2321                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2322                         /*
2323                          * GTK on AP interface is a TX-only key, return 0;
2324                          * on IBSS they're per-station and because we're lazy
2325                          * we don't support them for RX, so do the same.
2326                          */
2327                         ret = 0;
2328                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2329                         break;
2330                 }
2331
2332                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2333                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2334                 if (ret) {
2335                         IWL_WARN(mvm, "set key failed\n");
2336                         /*
2337                          * can't add key for RX, but we don't need it
2338                          * in the device for TX so still return 0
2339                          */
2340                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2341                         ret = 0;
2342                 }
2343
2344                 break;
2345         case DISABLE_KEY:
2346                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2347                         ret = 0;
2348                         break;
2349                 }
2350
2351                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2352                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2353                 break;
2354         default:
2355                 ret = -EINVAL;
2356         }
2357
2358         mutex_unlock(&mvm->mutex);
2359         return ret;
2360 }
2361
2362 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2363                                         struct ieee80211_vif *vif,
2364                                         struct ieee80211_key_conf *keyconf,
2365                                         struct ieee80211_sta *sta,
2366                                         u32 iv32, u16 *phase1key)
2367 {
2368         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2369
2370         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2371                 return;
2372
2373         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2374 }
2375
2376
2377 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2378                                struct iwl_rx_packet *pkt, void *data)
2379 {
2380         struct iwl_mvm *mvm =
2381                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2382         struct iwl_hs20_roc_res *resp;
2383         int resp_len = iwl_rx_packet_payload_len(pkt);
2384         struct iwl_mvm_time_event_data *te_data = data;
2385
2386         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2387                 return true;
2388
2389         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2390                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2391                 return true;
2392         }
2393
2394         resp = (void *)pkt->data;
2395
2396         IWL_DEBUG_TE(mvm,
2397                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2398                      resp->status, resp->event_unique_id);
2399
2400         te_data->uid = le32_to_cpu(resp->event_unique_id);
2401         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2402                      te_data->uid);
2403
2404         spin_lock_bh(&mvm->time_event_lock);
2405         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2406         spin_unlock_bh(&mvm->time_event_lock);
2407
2408         return true;
2409 }
2410
2411 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2412 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2413                                     struct ieee80211_channel *channel,
2414                                     struct ieee80211_vif *vif,
2415                                     int duration)
2416 {
2417         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2418         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2419         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2420         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2421         struct iwl_notification_wait wait_time_event;
2422         struct iwl_hs20_roc_req aux_roc_req = {
2423                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2424                 .id_and_color =
2425                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2426                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2427                 /* Set the channel info data */
2428                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2429                         PHY_BAND_24 : PHY_BAND_5,
2430                 .channel_info.channel = channel->hw_value,
2431                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2432                 /* Set the time and duration */
2433                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2434                 .apply_time_max_delay =
2435                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2436                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2437          };
2438
2439         /* Set the node address */
2440         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2441
2442         lockdep_assert_held(&mvm->mutex);
2443
2444         spin_lock_bh(&mvm->time_event_lock);
2445
2446         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2447                 spin_unlock_bh(&mvm->time_event_lock);
2448                 return -EIO;
2449         }
2450
2451         te_data->vif = vif;
2452         te_data->duration = duration;
2453         te_data->id = HOT_SPOT_CMD;
2454
2455         spin_unlock_bh(&mvm->time_event_lock);
2456
2457         /*
2458          * Use a notification wait, which really just processes the
2459          * command response and doesn't wait for anything, in order
2460          * to be able to process the response and get the UID inside
2461          * the RX path. Using CMD_WANT_SKB doesn't work because it
2462          * stores the buffer and then wakes up this thread, by which
2463          * time another notification (that the time event started)
2464          * might already be processed unsuccessfully.
2465          */
2466         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2467                                    time_event_response,
2468                                    ARRAY_SIZE(time_event_response),
2469                                    iwl_mvm_rx_aux_roc, te_data);
2470
2471         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2472                                    &aux_roc_req);
2473
2474         if (res) {
2475                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2476                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2477                 goto out_clear_te;
2478         }
2479
2480         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2481         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2482         /* should never fail */
2483         WARN_ON_ONCE(res);
2484
2485         if (res) {
2486  out_clear_te:
2487                 spin_lock_bh(&mvm->time_event_lock);
2488                 iwl_mvm_te_clear_data(mvm, te_data);
2489                 spin_unlock_bh(&mvm->time_event_lock);
2490         }
2491
2492         return res;
2493 }
2494
2495 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2496                        struct ieee80211_vif *vif,
2497                        struct ieee80211_channel *channel,
2498                        int duration,
2499                        enum ieee80211_roc_type type)
2500 {
2501         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2502         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2503         struct cfg80211_chan_def chandef;
2504         struct iwl_mvm_phy_ctxt *phy_ctxt;
2505         int ret, i;
2506
2507         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2508                            duration, type);
2509
2510         mutex_lock(&mvm->mutex);
2511
2512         switch (vif->type) {
2513         case NL80211_IFTYPE_STATION:
2514                 /* Use aux roc framework (HS20) */
2515                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2516                                                vif, duration);
2517                 goto out_unlock;
2518         case NL80211_IFTYPE_P2P_DEVICE:
2519                 /* handle below */
2520                 break;
2521         default:
2522                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2523                 ret = -EINVAL;
2524                 goto out_unlock;
2525         }
2526
2527         for (i = 0; i < NUM_PHY_CTX; i++) {
2528                 phy_ctxt = &mvm->phy_ctxts[i];
2529                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2530                         continue;
2531
2532                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2533                         /*
2534                          * Unbind the P2P_DEVICE from the current PHY context,
2535                          * and if the PHY context is not used remove it.
2536                          */
2537                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2538                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2539                                 goto out_unlock;
2540
2541                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2542
2543                         /* Bind the P2P_DEVICE to the current PHY Context */
2544                         mvmvif->phy_ctxt = phy_ctxt;
2545
2546                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2547                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2548                                 goto out_unlock;
2549
2550                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2551                         goto schedule_time_event;
2552                 }
2553         }
2554
2555         /* Need to update the PHY context only if the ROC channel changed */
2556         if (channel == mvmvif->phy_ctxt->channel)
2557                 goto schedule_time_event;
2558
2559         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2560
2561         /*
2562          * Change the PHY context configuration as it is currently referenced
2563          * only by the P2P Device MAC
2564          */
2565         if (mvmvif->phy_ctxt->ref == 1) {
2566                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2567                                                &chandef, 1, 1);
2568                 if (ret)
2569                         goto out_unlock;
2570         } else {
2571                 /*
2572                  * The PHY context is shared with other MACs. Need to remove the
2573                  * P2P Device from the binding, allocate an new PHY context and
2574                  * create a new binding
2575                  */
2576                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2577                 if (!phy_ctxt) {
2578                         ret = -ENOSPC;
2579                         goto out_unlock;
2580                 }
2581
2582                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2583                                                1, 1);
2584                 if (ret) {
2585                         IWL_ERR(mvm, "Failed to change PHY context\n");
2586                         goto out_unlock;
2587                 }
2588
2589                 /* Unbind the P2P_DEVICE from the current PHY context */
2590                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2591                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2592                         goto out_unlock;
2593
2594                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2595
2596                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2597                 mvmvif->phy_ctxt = phy_ctxt;
2598
2599                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2600                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2601                         goto out_unlock;
2602
2603                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2604         }
2605
2606 schedule_time_event:
2607         /* Schedule the time events */
2608         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2609
2610 out_unlock:
2611         mutex_unlock(&mvm->mutex);
2612         IWL_DEBUG_MAC80211(mvm, "leave\n");
2613         return ret;
2614 }
2615
2616 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2617 {
2618         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2619
2620         IWL_DEBUG_MAC80211(mvm, "enter\n");
2621
2622         mutex_lock(&mvm->mutex);
2623         iwl_mvm_stop_p2p_roc(mvm);
2624         mutex_unlock(&mvm->mutex);
2625
2626         IWL_DEBUG_MAC80211(mvm, "leave\n");
2627         return 0;
2628 }
2629
2630 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2631                                  struct ieee80211_chanctx_conf *ctx)
2632 {
2633         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2634         struct iwl_mvm_phy_ctxt *phy_ctxt;
2635         int ret;
2636
2637         lockdep_assert_held(&mvm->mutex);
2638
2639         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2640
2641         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2642         if (!phy_ctxt) {
2643                 ret = -ENOSPC;
2644                 goto out;
2645         }
2646
2647         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2648                                        ctx->rx_chains_static,
2649                                        ctx->rx_chains_dynamic);
2650         if (ret) {
2651                 IWL_ERR(mvm, "Failed to add PHY context\n");
2652                 goto out;
2653         }
2654
2655         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2656         *phy_ctxt_id = phy_ctxt->id;
2657 out:
2658         return ret;
2659 }
2660
2661 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2662                                struct ieee80211_chanctx_conf *ctx)
2663 {
2664         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2665         int ret;
2666
2667         mutex_lock(&mvm->mutex);
2668         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2669         mutex_unlock(&mvm->mutex);
2670
2671         return ret;
2672 }
2673
2674 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2675                                      struct ieee80211_chanctx_conf *ctx)
2676 {
2677         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2678         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2679
2680         lockdep_assert_held(&mvm->mutex);
2681
2682         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2683 }
2684
2685 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2686                                    struct ieee80211_chanctx_conf *ctx)
2687 {
2688         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2689
2690         mutex_lock(&mvm->mutex);
2691         __iwl_mvm_remove_chanctx(mvm, ctx);
2692         mutex_unlock(&mvm->mutex);
2693 }
2694
2695 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2696                                    struct ieee80211_chanctx_conf *ctx,
2697                                    u32 changed)
2698 {
2699         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2700         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2701         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2702
2703         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2704                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2705                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2706                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2707                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2708                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2709                       phy_ctxt->ref, changed))
2710                 return;
2711
2712         mutex_lock(&mvm->mutex);
2713         iwl_mvm_bt_coex_vif_change(mvm);
2714         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2715                                  ctx->rx_chains_static,
2716                                  ctx->rx_chains_dynamic);
2717         mutex_unlock(&mvm->mutex);
2718 }
2719
2720 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2721                                         struct ieee80211_vif *vif,
2722                                         struct ieee80211_chanctx_conf *ctx,
2723                                         bool switching_chanctx)
2724 {
2725         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2726         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2727         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2728         int ret;
2729
2730         lockdep_assert_held(&mvm->mutex);
2731
2732         mvmvif->phy_ctxt = phy_ctxt;
2733
2734         switch (vif->type) {
2735         case NL80211_IFTYPE_AP:
2736                 /* Unless it's a CSA flow we have nothing to do here */
2737                 if (vif->csa_active) {
2738                         mvmvif->ap_ibss_active = true;
2739                         break;
2740                 }
2741         case NL80211_IFTYPE_ADHOC:
2742                 /*
2743                  * The AP binding flow is handled as part of the start_ap flow
2744                  * (in bss_info_changed), similarly for IBSS.
2745                  */
2746                 ret = 0;
2747                 goto out;
2748         case NL80211_IFTYPE_STATION:
2749                 break;
2750         case NL80211_IFTYPE_MONITOR:
2751                 /* always disable PS when a monitor interface is active */
2752                 mvmvif->ps_disabled = true;
2753                 break;
2754         default:
2755                 ret = -EINVAL;
2756                 goto out;
2757         }
2758
2759         ret = iwl_mvm_binding_add_vif(mvm, vif);
2760         if (ret)
2761                 goto out;
2762
2763         /*
2764          * Power state must be updated before quotas,
2765          * otherwise fw will complain.
2766          */
2767         iwl_mvm_power_update_mac(mvm);
2768
2769         /* Setting the quota at this stage is only required for monitor
2770          * interfaces. For the other types, the bss_info changed flow
2771          * will handle quota settings.
2772          */
2773         if (vif->type == NL80211_IFTYPE_MONITOR) {
2774                 mvmvif->monitor_active = true;
2775                 ret = iwl_mvm_update_quotas(mvm, NULL);
2776                 if (ret)
2777                         goto out_remove_binding;
2778         }
2779
2780         /* Handle binding during CSA */
2781         if ((vif->type == NL80211_IFTYPE_AP) ||
2782             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2783                 iwl_mvm_update_quotas(mvm, NULL);
2784                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2785         }
2786
2787         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2788                 struct iwl_mvm_sta *mvmsta;
2789
2790                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2791                                                           mvmvif->ap_sta_id);
2792
2793                 if (WARN_ON(!mvmsta))
2794                         goto out;
2795
2796                 /* TODO: only re-enable after the first beacon */
2797                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2798         }
2799
2800         goto out;
2801
2802 out_remove_binding:
2803         iwl_mvm_binding_remove_vif(mvm, vif);
2804         iwl_mvm_power_update_mac(mvm);
2805 out:
2806         if (ret)
2807                 mvmvif->phy_ctxt = NULL;
2808         return ret;
2809 }
2810 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2811                                       struct ieee80211_vif *vif,
2812                                       struct ieee80211_chanctx_conf *ctx)
2813 {
2814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2815         int ret;
2816
2817         mutex_lock(&mvm->mutex);
2818         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2819         mutex_unlock(&mvm->mutex);
2820
2821         return ret;
2822 }
2823
2824 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2825                                            struct ieee80211_vif *vif,
2826                                            struct ieee80211_chanctx_conf *ctx,
2827                                            bool switching_chanctx)
2828 {
2829         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2830         struct ieee80211_vif *disabled_vif = NULL;
2831         struct iwl_mvm_sta *mvmsta;
2832
2833         lockdep_assert_held(&mvm->mutex);
2834
2835         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2836
2837         switch (vif->type) {
2838         case NL80211_IFTYPE_ADHOC:
2839                 goto out;
2840         case NL80211_IFTYPE_MONITOR:
2841                 mvmvif->monitor_active = false;
2842                 mvmvif->ps_disabled = false;
2843                 break;
2844         case NL80211_IFTYPE_AP:
2845                 /* This part is triggered only during CSA */
2846                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2847                         goto out;
2848
2849                 /* Set CS bit on all the stations */
2850                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2851
2852                 /* Save blocked iface, the timeout is set on the next beacon */
2853                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2854
2855                 mvmvif->ap_ibss_active = false;
2856                 break;
2857         case NL80211_IFTYPE_STATION:
2858                 if (!switching_chanctx)
2859                         break;
2860
2861                 disabled_vif = vif;
2862
2863                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2864                                                           mvmvif->ap_sta_id);
2865
2866                 if (!WARN_ON(!mvmsta))
2867                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2868
2869                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2870                 break;
2871         default:
2872                 break;
2873         }
2874
2875         iwl_mvm_update_quotas(mvm, disabled_vif);
2876         iwl_mvm_binding_remove_vif(mvm, vif);
2877
2878 out:
2879         mvmvif->phy_ctxt = NULL;
2880         iwl_mvm_power_update_mac(mvm);
2881 }
2882
2883 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2884                                          struct ieee80211_vif *vif,
2885                                          struct ieee80211_chanctx_conf *ctx)
2886 {
2887         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2888
2889         mutex_lock(&mvm->mutex);
2890         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2891         mutex_unlock(&mvm->mutex);
2892 }
2893
2894 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2895                                       struct ieee80211_vif_chanctx_switch *vifs,
2896                                       int n_vifs,
2897                                       enum ieee80211_chanctx_switch_mode mode)
2898 {
2899         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2900         int ret;
2901
2902         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2903         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2904                 return -EOPNOTSUPP;
2905
2906         mutex_lock(&mvm->mutex);
2907         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2908         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2909
2910         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2911         if (ret) {
2912                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2913                 goto out_reassign;
2914         }
2915
2916         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2917                                            true);
2918         if (ret) {
2919                 IWL_ERR(mvm,
2920                         "failed to assign new_ctx during channel switch\n");
2921                 goto out_remove;
2922         }
2923
2924         /* we don't support TDLS during DCM - can be caused by channel switch */
2925         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2926                 iwl_mvm_teardown_tdls_peers(mvm);
2927
2928         goto out;
2929
2930 out_remove:
2931         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2932
2933 out_reassign:
2934         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2935         if (ret) {
2936                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2937                 goto out_restart;
2938         }
2939
2940         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2941                                            true);
2942         if (ret) {
2943                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2944                 goto out_restart;
2945         }
2946
2947         goto out;
2948
2949 out_restart:
2950         /* things keep failing, better restart the hw */
2951         iwl_mvm_nic_restart(mvm, false);
2952
2953 out:
2954         mutex_unlock(&mvm->mutex);
2955         return ret;
2956 }
2957
2958 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2959                            struct ieee80211_sta *sta,
2960                            bool set)
2961 {
2962         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2963         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2964
2965         if (!mvm_sta || !mvm_sta->vif) {
2966                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2967                 return -EINVAL;
2968         }
2969
2970         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2971 }
2972
2973 #ifdef CONFIG_NL80211_TESTMODE
2974 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2975         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2976         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2977         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2978 };
2979
2980 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2981                                       struct ieee80211_vif *vif,
2982                                       void *data, int len)
2983 {
2984         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2985         int err;
2986         u32 noa_duration;
2987
2988         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2989         if (err)
2990                 return err;
2991
2992         if (!tb[IWL_MVM_TM_ATTR_CMD])
2993                 return -EINVAL;
2994
2995         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2996         case IWL_MVM_TM_CMD_SET_NOA:
2997                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2998                     !vif->bss_conf.enable_beacon ||
2999                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3000                         return -EINVAL;
3001
3002                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3003                 if (noa_duration >= vif->bss_conf.beacon_int)
3004                         return -EINVAL;
3005
3006                 mvm->noa_duration = noa_duration;
3007                 mvm->noa_vif = vif;
3008
3009                 return iwl_mvm_update_quotas(mvm, NULL);
3010         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3011                 /* must be associated client vif - ignore authorized */
3012                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3013                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3014                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3015                         return -EINVAL;
3016
3017                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3018                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3019                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3020         }
3021
3022         return -EOPNOTSUPP;
3023 }
3024
3025 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3026                                     struct ieee80211_vif *vif,
3027                                     void *data, int len)
3028 {
3029         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3030         int err;
3031
3032         mutex_lock(&mvm->mutex);
3033         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3034         mutex_unlock(&mvm->mutex);
3035
3036         return err;
3037 }
3038 #endif
3039
3040 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3041                                           struct ieee80211_vif *vif,
3042                                           struct cfg80211_chan_def *chandef)
3043 {
3044         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3045         struct ieee80211_vif *csa_vif;
3046
3047         mutex_lock(&mvm->mutex);
3048
3049         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3050                                             lockdep_is_held(&mvm->mutex));
3051         if (WARN(csa_vif && csa_vif->csa_active,
3052                  "Another CSA is already in progress"))
3053                 goto out_unlock;
3054
3055         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3056                            chandef->center_freq1);
3057         rcu_assign_pointer(mvm->csa_vif, vif);
3058
3059 out_unlock:
3060         mutex_unlock(&mvm->mutex);
3061 }
3062
3063 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3064                               struct ieee80211_vif *vif, u32 queues, bool drop)
3065 {
3066         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3067         struct iwl_mvm_vif *mvmvif;
3068         struct iwl_mvm_sta *mvmsta;
3069
3070         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3071                 return;
3072
3073         mutex_lock(&mvm->mutex);
3074         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3075         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3076
3077         if (WARN_ON_ONCE(!mvmsta)) {
3078                 mutex_unlock(&mvm->mutex);
3079                 return;
3080         }
3081
3082         if (drop) {
3083                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3084                         IWL_ERR(mvm, "flush request fail\n");
3085                 mutex_unlock(&mvm->mutex);
3086         } else {
3087                 u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
3088                 mutex_unlock(&mvm->mutex);
3089
3090                 /* this can take a while, and we may need/want other operations
3091                  * to succeed while doing this, so do it without the mutex held
3092                  */
3093                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
3094         }
3095 }
3096
3097 const struct ieee80211_ops iwl_mvm_hw_ops = {
3098         .tx = iwl_mvm_mac_tx,
3099         .ampdu_action = iwl_mvm_mac_ampdu_action,
3100         .start = iwl_mvm_mac_start,
3101         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3102         .stop = iwl_mvm_mac_stop,
3103         .add_interface = iwl_mvm_mac_add_interface,
3104         .remove_interface = iwl_mvm_mac_remove_interface,
3105         .config = iwl_mvm_mac_config,
3106         .prepare_multicast = iwl_mvm_prepare_multicast,
3107         .configure_filter = iwl_mvm_configure_filter,
3108         .bss_info_changed = iwl_mvm_bss_info_changed,
3109         .hw_scan = iwl_mvm_mac_hw_scan,
3110         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3111         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3112         .sta_state = iwl_mvm_mac_sta_state,
3113         .sta_notify = iwl_mvm_mac_sta_notify,
3114         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3115         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3116         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3117         .sta_rc_update = iwl_mvm_sta_rc_update,
3118         .conf_tx = iwl_mvm_mac_conf_tx,
3119         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3120         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3121         .flush = iwl_mvm_mac_flush,
3122         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3123         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3124         .set_key = iwl_mvm_mac_set_key,
3125         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3126         .remain_on_channel = iwl_mvm_roc,
3127         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3128         .add_chanctx = iwl_mvm_add_chanctx,
3129         .remove_chanctx = iwl_mvm_remove_chanctx,
3130         .change_chanctx = iwl_mvm_change_chanctx,
3131         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3132         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3133         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3134
3135         .start_ap = iwl_mvm_start_ap_ibss,
3136         .stop_ap = iwl_mvm_stop_ap_ibss,
3137         .join_ibss = iwl_mvm_start_ap_ibss,
3138         .leave_ibss = iwl_mvm_stop_ap_ibss,
3139
3140         .set_tim = iwl_mvm_set_tim,
3141
3142         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3143
3144         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3145
3146 #ifdef CONFIG_PM_SLEEP
3147         /* look at d3.c */
3148         .suspend = iwl_mvm_suspend,
3149         .resume = iwl_mvm_resume,
3150         .set_wakeup = iwl_mvm_set_wakeup,
3151         .set_rekey_data = iwl_mvm_set_rekey_data,
3152 #if IS_ENABLED(CONFIG_IPV6)
3153         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3154 #endif
3155         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3156 #endif
3157 };