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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  23  * USA
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  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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  45  *    notice, this list of conditions and the following disclaimer in
  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
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  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 <net/mac80211.h>
  73 #include <net/ieee80211_radiotap.h>
  74 #include <net/tcp.h>
  75
  76 #include "iwl-op-mode.h"
  77 #include "iwl-io.h"
  78 #include "mvm.h"
  79 #include "sta.h"
  80 #include "time-event.h"
  81 #include "iwl-eeprom-parse.h"
  82 #include "fw-api-scan.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87
  88 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  89         {
  90                 .max = 1,
  91                 .types = BIT(NL80211_IFTYPE_STATION),
  92         },
  93         {
  94                 .max = 1,
  95                 .types = BIT(NL80211_IFTYPE_AP) |
  96                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  97                         BIT(NL80211_IFTYPE_P2P_GO),
  98         },
  99         {
 100                 .max = 1,
 101                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 102         },
 103 };
 104
 105 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 106         {
 107                 .num_different_channels = 1,
 108                 .max_interfaces = 3,
 109                 .limits = iwl_mvm_limits,
 110                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 111         },
 112 };
 113
 114 #ifdef CONFIG_PM_SLEEP
 115 static const struct nl80211_wowlan_tcp_data_token_feature
 116 iwl_mvm_wowlan_tcp_token_feature = {
 117         .min_len = 0,
 118         .max_len = 255,
 119         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 120 };
 121
 122 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 123         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 124         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 125                             sizeof(struct ethhdr) -
 126                             sizeof(struct iphdr) -
 127                             sizeof(struct tcphdr),
 128         .data_interval_max = 65535, /* __le16 in API */
 129         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 130                             sizeof(struct ethhdr) -
 131                             sizeof(struct iphdr) -
 132                             sizeof(struct tcphdr),
 133         .seq = true,
 134 };
 135 #endif
 136
 137 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 138 /*
 139  * Use the reserved field to indicate magic values.
 140  * these values will only be used internally by the driver,
 141  * and won't make it to the fw (reserved will be 0).
 142  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 143  *      be the vif's ip address. in case there is not a single
 144  *      ip address (0, or more than 1), this attribute will
 145  *      be skipped.
 146  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 147  *      the LSB bytes of the vif's mac address
 148  */
 149 enum {
 150         BC_FILTER_MAGIC_NONE = 0,
 151         BC_FILTER_MAGIC_IP,
 152         BC_FILTER_MAGIC_MAC,
 153 };
 154
 155 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 156         {
 157                 /* arp */
 158                 .discard = 0,
 159                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 160                 .attrs = {
 161                         {
 162                                 /* frame type - arp, hw type - ethernet */
 163                                 .offset_type =
 164                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 165                                 .offset = sizeof(rfc1042_header),
 166                                 .val = cpu_to_be32(0x08060001),
 167                                 .mask = cpu_to_be32(0xffffffff),
 168                         },
 169                         {
 170                                 /* arp dest ip */
 171                                 .offset_type =
 172                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 173                                 .offset = sizeof(rfc1042_header) + 2 +
 174                                           sizeof(struct arphdr) +
 175                                           ETH_ALEN + sizeof(__be32) +
 176                                           ETH_ALEN,
 177                                 .mask = cpu_to_be32(0xffffffff),
 178                                 /* mark it as special field */
 179                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 180                         },
 181                 },
 182         },
 183         {
 184                 /* dhcp offer bcast */
 185                 .discard = 0,
 186                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 187                 .attrs = {
 188                         {
 189                                 /* udp dest port - 68 (bootp client)*/
 190                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 191                                 .offset = offsetof(struct udphdr, dest),
 192                                 .val = cpu_to_be32(0x00440000),
 193                                 .mask = cpu_to_be32(0xffff0000),
 194                         },
 195                         {
 196                                 /* dhcp - lsb bytes of client hw address */
 197                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 198                                 .offset = 38,
 199                                 .mask = cpu_to_be32(0xffffffff),
 200                                 /* mark it as special field */
 201                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 202                         },
 203                 },
 204         },
 205         /* last filter must be empty */
 206         {},
 207 };
 208 #endif
 209
 210 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 211 {
 212         if (!iwl_mvm_is_d0i3_supported(mvm))
 213                 return;
 214
 215         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 216         spin_lock_bh(&mvm->refs_lock);
 217         mvm->refs[ref_type]++;
 218         spin_unlock_bh(&mvm->refs_lock);
 219         iwl_trans_ref(mvm->trans);
 220 }
 221
 222 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 223 {
 224         if (!iwl_mvm_is_d0i3_supported(mvm))
 225                 return;
 226
 227         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 228         spin_lock_bh(&mvm->refs_lock);
 229         WARN_ON(!mvm->refs[ref_type]--);
 230         spin_unlock_bh(&mvm->refs_lock);
 231         iwl_trans_unref(mvm->trans);
 232 }
 233
 234 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 235                                      enum iwl_mvm_ref_type except_ref)
 236 {
 237         int i, j;
 238
 239         if (!iwl_mvm_is_d0i3_supported(mvm))
 240                 return;
 241
 242         spin_lock_bh(&mvm->refs_lock);
 243         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 244                 if (except_ref == i || !mvm->refs[i])
 245                         continue;
 246
 247                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 248                               i, mvm->refs[i]);
 249                 for (j = 0; j < mvm->refs[i]; j++)
 250                         iwl_trans_unref(mvm->trans);
 251                 mvm->refs[i] = 0;
 252         }
 253         spin_unlock_bh(&mvm->refs_lock);
 254 }
 255
 256 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 257 {
 258         iwl_mvm_ref(mvm, ref_type);
 259
 260         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 261                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 262                                 HZ)) {
 263                 WARN_ON_ONCE(1);
 264                 iwl_mvm_unref(mvm, ref_type);
 265                 return -EIO;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 272 {
 273         int i;
 274
 275         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 276         for (i = 0; i < NUM_PHY_CTX; i++) {
 277                 mvm->phy_ctxts[i].id = i;
 278                 mvm->phy_ctxts[i].ref = 0;
 279         }
 280 }
 281
 282 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 283 {
 284         /* we create the 802.11 header and SSID element */
 285         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 286                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 287         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 288 }
 289
 290 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 291 {
 292         struct ieee80211_hw *hw = mvm->hw;
 293         int num_mac, ret, i;
 294
 295         /* Tell mac80211 our characteristics */
 296         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 297                     IEEE80211_HW_SPECTRUM_MGMT |
 298                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 299                     IEEE80211_HW_QUEUE_CONTROL |
 300                     IEEE80211_HW_WANT_MONITOR_VIF |
 301                     IEEE80211_HW_SUPPORTS_PS |
 302                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 303                     IEEE80211_HW_AMPDU_AGGREGATION |
 304                     IEEE80211_HW_TIMING_BEACON_ONLY |
 305                     IEEE80211_HW_CONNECTION_MONITOR |
 306                     IEEE80211_HW_CHANCTX_STA_CSA |
 307                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 308                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 309
 310         hw->queues = mvm->first_agg_queue;
 311         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 312         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 313                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 314         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 315         hw->rate_control_algorithm = "iwl-mvm-rs";
 316
 317         /*
 318          * Enable 11w if advertised by firmware and software crypto
 319          * is not enabled (as the firmware will interpret some mgmt
 320          * packets, so enabling it with software crypto isn't safe)
 321          */
 322         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 323             !iwlwifi_mod_params.sw_crypto)
 324                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 325
 326         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 327             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 328             !iwlwifi_mod_params.uapsd_disable) {
 329                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 330                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 331                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 332         }
 333
 334         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 335                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 336
 337         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 338         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 339         hw->chanctx_data_size = sizeof(u16);
 340
 341         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 342                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 343                 BIT(NL80211_IFTYPE_AP) |
 344                 BIT(NL80211_IFTYPE_P2P_GO) |
 345                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 346                 BIT(NL80211_IFTYPE_ADHOC);
 347
 348         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 349         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 350                                        REGULATORY_DISABLE_BEACON_HINTS;
 351
 352         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 353                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 354
 355         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 356                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 357
 358         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 359         hw->wiphy->n_iface_combinations =
 360                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 361
 362         hw->wiphy->max_remain_on_channel_duration = 10000;
 363         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 364
 365         /* Extract MAC address */
 366         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 367         hw->wiphy->addresses = mvm->addresses;
 368         hw->wiphy->n_addresses = 1;
 369
 370         /* Extract additional MAC addresses if available */
 371         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 372                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 373
 374         for (i = 1; i < num_mac; i++) {
 375                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 376                        ETH_ALEN);
 377                 mvm->addresses[i].addr[5]++;
 378                 hw->wiphy->n_addresses++;
 379         }
 380
 381         iwl_mvm_reset_phy_ctxts(mvm);
 382
 383         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 384
 385         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 386
 387         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 388                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 389                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 390         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 391                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 392                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 393
 394         hw->wiphy->hw_version = mvm->trans->hw_id;
 395
 396         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 397                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 398         else
 399                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 400
 401         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 402                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 403                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 404                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 405                 /* we create the 802.11 header and zero length SSID IE. */
 406                 hw->wiphy->max_sched_scan_ie_len =
 407                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 408         }
 409
 410         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 411                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 412                                NL80211_FEATURE_P2P_GO_OPPPS;
 413
 414         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 415
 416         /* currently FW API supports only one optional cipher scheme */
 417         if (mvm->fw->cs[0].cipher) {
 418                 mvm->hw->n_cipher_schemes = 1;
 419                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 420         }
 421
 422 #ifdef CONFIG_PM_SLEEP
 423         if (iwl_mvm_is_d0i3_supported(mvm) &&
 424             device_can_wakeup(mvm->trans->dev)) {
 425                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 426                 hw->wiphy->wowlan = &mvm->wowlan;
 427         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 428             mvm->trans->ops->d3_suspend &&
 429             mvm->trans->ops->d3_resume &&
 430             device_can_wakeup(mvm->trans->dev)) {
 431                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 432                                     WIPHY_WOWLAN_DISCONNECT |
 433                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 434                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 435                 if (!iwlwifi_mod_params.sw_crypto)
 436                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 437                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 438                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 439
 440                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 441                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 442                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 443                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 444                 hw->wiphy->wowlan = &mvm->wowlan;
 445         }
 446 #endif
 447
 448 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 449         /* assign default bcast filtering configuration */
 450         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 451 #endif
 452
 453         ret = iwl_mvm_leds_init(mvm);
 454         if (ret)
 455                 return ret;
 456
 457         ret = ieee80211_register_hw(mvm->hw);
 458         if (ret)
 459                 iwl_mvm_leds_exit(mvm);
 460
 461         return ret;
 462 }
 463
 464 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 465                              struct ieee80211_sta *sta,
 466                              struct sk_buff *skb)
 467 {
 468         struct iwl_mvm_sta *mvmsta;
 469         bool defer = false;
 470
 471         /*
 472          * double check the IN_D0I3 flag both before and after
 473          * taking the spinlock, in order to prevent taking
 474          * the spinlock when not needed.
 475          */
 476         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 477                 return false;
 478
 479         spin_lock(&mvm->d0i3_tx_lock);
 480         /*
 481          * testing the flag again ensures the skb dequeue
 482          * loop (on d0i3 exit) hasn't run yet.
 483          */
 484         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 485                 goto out;
 486
 487         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 488         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 489             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 490                 goto out;
 491
 492         __skb_queue_tail(&mvm->d0i3_tx, skb);
 493         ieee80211_stop_queues(mvm->hw);
 494
 495         /* trigger wakeup */
 496         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 497         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 498
 499         defer = true;
 500 out:
 501         spin_unlock(&mvm->d0i3_tx_lock);
 502         return defer;
 503 }
 504
 505 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 506                            struct ieee80211_tx_control *control,
 507                            struct sk_buff *skb)
 508 {
 509         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 510         struct ieee80211_sta *sta = control->sta;
 511         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 512         struct ieee80211_hdr *hdr = (void *)skb->data;
 513
 514         if (iwl_mvm_is_radio_killed(mvm)) {
 515                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 516                 goto drop;
 517         }
 518
 519         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 520             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 521                 goto drop;
 522
 523         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 524         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 525                      ieee80211_is_mgmt(hdr->frame_control) &&
 526                      !ieee80211_is_deauth(hdr->frame_control) &&
 527                      !ieee80211_is_disassoc(hdr->frame_control) &&
 528                      !ieee80211_is_action(hdr->frame_control)))
 529                 sta = NULL;
 530
 531         if (sta) {
 532                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 533                         return;
 534                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 535                         goto drop;
 536                 return;
 537         }
 538
 539         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 540                 goto drop;
 541         return;
 542  drop:
 543         ieee80211_free_txskb(hw, skb);
 544 }
 545
 546 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 547 {
 548         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 549                 return false;
 550         return true;
 551 }
 552
 553 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 554 {
 555         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 556                 return false;
 557         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 558                 return true;
 559
 560         /* enabled by default */
 561         return true;
 562 }
 563
 564 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 565                                     struct ieee80211_vif *vif,
 566                                     enum ieee80211_ampdu_mlme_action action,
 567                                     struct ieee80211_sta *sta, u16 tid,
 568                                     u16 *ssn, u8 buf_size)
 569 {
 570         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 571         int ret;
 572         bool tx_agg_ref = false;
 573
 574         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 575                      sta->addr, tid, action);
 576
 577         if (!(mvm->nvm_data->sku_cap_11n_enable))
 578                 return -EACCES;
 579
 580         /* return from D0i3 before starting a new Tx aggregation */
 581         switch (action) {
 582         case IEEE80211_AMPDU_TX_START:
 583         case IEEE80211_AMPDU_TX_STOP_CONT:
 584         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 585         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 586         case IEEE80211_AMPDU_TX_OPERATIONAL:
 587                 /*
 588                  * for tx start, wait synchronously until D0i3 exit to
 589                  * get the correct sequence number for the tid.
 590                  * additionally, some other ampdu actions use direct
 591                  * target access, which is not handled automatically
 592                  * by the trans layer (unlike commands), so wait for
 593                  * d0i3 exit in these cases as well.
 594                  */
 595                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 596                 if (ret)
 597                         return ret;
 598
 599                 tx_agg_ref = true;
 600                 break;
 601         default:
 602                 break;
 603         }
 604
 605         mutex_lock(&mvm->mutex);
 606
 607         switch (action) {
 608         case IEEE80211_AMPDU_RX_START:
 609                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 610                         ret = -EINVAL;
 611                         break;
 612                 }
 613                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 614                 break;
 615         case IEEE80211_AMPDU_RX_STOP:
 616                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 617                 break;
 618         case IEEE80211_AMPDU_TX_START:
 619                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 620                         ret = -EINVAL;
 621                         break;
 622                 }
 623                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 624                 break;
 625         case IEEE80211_AMPDU_TX_STOP_CONT:
 626                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 627                 break;
 628         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 629         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 630                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 631                 break;
 632         case IEEE80211_AMPDU_TX_OPERATIONAL:
 633                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 634                 break;
 635         default:
 636                 WARN_ON_ONCE(1);
 637                 ret = -EINVAL;
 638                 break;
 639         }
 640         mutex_unlock(&mvm->mutex);
 641
 642         /*
 643          * If the tid is marked as started, we won't use it for offloaded
 644          * traffic on the next D0i3 entry. It's safe to unref.
 645          */
 646         if (tx_agg_ref)
 647                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 648
 649         return ret;
 650 }
 651
 652 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 653                                      struct ieee80211_vif *vif)
 654 {
 655         struct iwl_mvm *mvm = data;
 656         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 657
 658         mvmvif->uploaded = false;
 659         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 660
 661         /* does this make sense at all? */
 662         mvmvif->color++;
 663
 664         spin_lock_bh(&mvm->time_event_lock);
 665         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 666         spin_unlock_bh(&mvm->time_event_lock);
 667
 668         mvmvif->phy_ctxt = NULL;
 669         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 670 }
 671
 672 #ifdef CONFIG_IWLWIFI_DEBUGFS
 673 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 674 {
 675         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 676         struct iwl_fw_error_dump_file *dump_file;
 677         struct iwl_fw_error_dump_data *dump_data;
 678         struct iwl_fw_error_dump_info *dump_info;
 679         struct iwl_mvm_dump_ptrs *fw_error_dump;
 680         const struct fw_img *img;
 681         u32 sram_len, sram_ofs;
 682         u32 file_len, rxf_len;
 683         unsigned long flags;
 684         int reg_val;
 685
 686         lockdep_assert_held(&mvm->mutex);
 687
 688         if (mvm->fw_error_dump)
 689                 return;
 690
 691         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 692         if (!fw_error_dump)
 693                 return;
 694
 695         img = &mvm->fw->img[mvm->cur_ucode];
 696         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 697         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 698
 699         /* reading buffer size */
 700         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 701         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 702
 703         /* the register holds the value divided by 128 */
 704         rxf_len = rxf_len << 7;
 705
 706         file_len = sizeof(*dump_file) +
 707                    sizeof(*dump_data) * 3 +
 708                    sram_len +
 709                    rxf_len +
 710                    sizeof(*dump_info);
 711
 712         dump_file = vzalloc(file_len);
 713         if (!dump_file) {
 714                 kfree(fw_error_dump);
 715                 return;
 716         }
 717
 718         fw_error_dump->op_mode_ptr = dump_file;
 719
 720         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 721         dump_data = (void *)dump_file->data;
 722
 723         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 724         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 725         dump_info = (void *) dump_data->data;
 726         dump_info->device_family =
 727                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 728                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 729                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 730         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 731                sizeof(dump_info->fw_human_readable));
 732         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 733                 sizeof(dump_info->dev_human_readable));
 734         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 735                 sizeof(dump_info->bus_human_readable));
 736
 737         dump_data = iwl_fw_error_next_data(dump_data);
 738         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 739         dump_data->len = cpu_to_le32(rxf_len);
 740
 741         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 742                 u32 *rxf = (void *)dump_data->data;
 743                 int i;
 744
 745                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 746                         iwl_trans_write_prph(mvm->trans,
 747                                              RXF_LD_FENCE_OFFSET_ADDR,
 748                                              i * sizeof(u32));
 749                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 750                                                      RXF_FIFO_RD_FENCE_ADDR);
 751                 }
 752                 iwl_trans_release_nic_access(mvm->trans, &flags);
 753         }
 754
 755         dump_data = iwl_fw_error_next_data(dump_data);
 756         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 757         dump_data->len = cpu_to_le32(sram_len);
 758         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 759                                  sram_len);
 760
 761         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 762         fw_error_dump->op_mode_len = file_len;
 763         if (fw_error_dump->trans_ptr)
 764                 file_len += fw_error_dump->trans_ptr->len;
 765         dump_file->file_len = cpu_to_le32(file_len);
 766         mvm->fw_error_dump = fw_error_dump;
 767
 768         /* notify the userspace about the error we had */
 769         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 770 }
 771 #endif
 772
 773 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 774 {
 775         iwl_mvm_fw_error_dump(mvm);
 776
 777         iwl_trans_stop_device(mvm->trans);
 778
 779         mvm->scan_status = IWL_MVM_SCAN_NONE;
 780         mvm->ps_disabled = false;
 781
 782         /* just in case one was running */
 783         ieee80211_remain_on_channel_expired(mvm->hw);
 784
 785         ieee80211_iterate_active_interfaces_atomic(
 786                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 787                 iwl_mvm_cleanup_iterator, mvm);
 788
 789         mvm->p2p_device_vif = NULL;
 790         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 791
 792         iwl_mvm_reset_phy_ctxts(mvm);
 793         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 794         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 795         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 796         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 797         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 798         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 799         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 800         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 801
 802         ieee80211_wake_queues(mvm->hw);
 803
 804         /* cleanup all stale references (scan, roc), but keep the
 805          * ucode_down ref until reconfig is complete */
 806         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 807
 808         /* clear any stale d0i3 state */
 809         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 810
 811         mvm->vif_count = 0;
 812         mvm->rx_ba_sessions = 0;
 813 }
 814
 815 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 816 {
 817         int ret;
 818
 819         lockdep_assert_held(&mvm->mutex);
 820
 821         /* Clean up some internal and mac80211 state on restart */
 822         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 823                 iwl_mvm_restart_cleanup(mvm);
 824
 825         ret = iwl_mvm_up(mvm);
 826
 827         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 828                 /* Something went wrong - we need to finish some cleanup
 829                  * that normally iwl_mvm_mac_restart_complete() below
 830                  * would do.
 831                  */
 832                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 833                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 834         }
 835
 836         return ret;
 837 }
 838
 839 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 840 {
 841         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 842         int ret;
 843
 844         mutex_lock(&mvm->mutex);
 845         ret = __iwl_mvm_mac_start(mvm);
 846         mutex_unlock(&mvm->mutex);
 847
 848         return ret;
 849 }
 850
 851 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 852 {
 853         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 854         int ret;
 855
 856         mutex_lock(&mvm->mutex);
 857
 858         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 859         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 860         ret = iwl_mvm_update_quotas(mvm, NULL);
 861         if (ret)
 862                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 863                         ret);
 864
 865         /* allow transport/FW low power modes */
 866         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 867
 868         mutex_unlock(&mvm->mutex);
 869 }
 870
 871 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 872 {
 873         lockdep_assert_held(&mvm->mutex);
 874
 875         /* disallow low power states when the FW is down */
 876         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 877
 878         /* async_handlers_wk is now blocked */
 879
 880         /*
 881          * The work item could be running or queued if the
 882          * ROC time event stops just as we get here.
 883          */
 884         cancel_work_sync(&mvm->roc_done_wk);
 885
 886         iwl_trans_stop_device(mvm->trans);
 887
 888         iwl_mvm_async_handlers_purge(mvm);
 889         /* async_handlers_list is empty and will stay empty: HW is stopped */
 890
 891         /* the fw is stopped, the aux sta is dead: clean up driver state */
 892         iwl_mvm_del_aux_sta(mvm);
 893
 894         mvm->ucode_loaded = false;
 895 }
 896
 897 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 898 {
 899         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 900
 901         flush_work(&mvm->d0i3_exit_work);
 902         flush_work(&mvm->async_handlers_wk);
 903         flush_work(&mvm->fw_error_dump_wk);
 904
 905         mutex_lock(&mvm->mutex);
 906         __iwl_mvm_mac_stop(mvm);
 907         mutex_unlock(&mvm->mutex);
 908
 909         /*
 910          * The worker might have been waiting for the mutex, let it run and
 911          * discover that its list is now empty.
 912          */
 913         cancel_work_sync(&mvm->async_handlers_wk);
 914 }
 915
 916 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 917 {
 918         u16 i;
 919
 920         lockdep_assert_held(&mvm->mutex);
 921
 922         for (i = 0; i < NUM_PHY_CTX; i++)
 923                 if (!mvm->phy_ctxts[i].ref)
 924                         return &mvm->phy_ctxts[i];
 925
 926         IWL_ERR(mvm, "No available PHY context\n");
 927         return NULL;
 928 }
 929
 930 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 931                                 s8 tx_power)
 932 {
 933         /* FW is in charge of regulatory enforcement */
 934         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 935                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 936                 .pwr_restriction = cpu_to_le16(tx_power),
 937         };
 938
 939         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 940                                     sizeof(reduce_txpwr_cmd),
 941                                     &reduce_txpwr_cmd);
 942 }
 943
 944 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 945                                      struct ieee80211_vif *vif)
 946 {
 947         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 948         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 949         int ret;
 950
 951         /*
 952          * make sure D0i3 exit is completed, otherwise a target access
 953          * during tx queue configuration could be done when still in
 954          * D0i3 state.
 955          */
 956         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 957         if (ret)
 958                 return ret;
 959
 960         /*
 961          * Not much to do here. The stack will not allow interface
 962          * types or combinations that we didn't advertise, so we
 963          * don't really have to check the types.
 964          */
 965
 966         mutex_lock(&mvm->mutex);
 967
 968         /* Allocate resources for the MAC context, and add it to the fw  */
 969         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 970         if (ret)
 971                 goto out_unlock;
 972
 973         /* Counting number of interfaces is needed for legacy PM */
 974         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 975                 mvm->vif_count++;
 976
 977         /*
 978          * The AP binding flow can be done only after the beacon
 979          * template is configured (which happens only in the mac80211
 980          * start_ap() flow), and adding the broadcast station can happen
 981          * only after the binding.
 982          * In addition, since modifying the MAC before adding a bcast
 983          * station is not allowed by the FW, delay the adding of MAC context to
 984          * the point where we can also add the bcast station.
 985          * In short: there's not much we can do at this point, other than
 986          * allocating resources :)
 987          */
 988         if (vif->type == NL80211_IFTYPE_AP ||
 989             vif->type == NL80211_IFTYPE_ADHOC) {
 990                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
 991                 if (ret) {
 992                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 993                         goto out_release;
 994                 }
 995
 996                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 997                 goto out_unlock;
 998         }
 999
1000         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1001         if (ret)
1002                 goto out_release;
1003
1004         ret = iwl_mvm_power_update_mac(mvm);
1005         if (ret)
1006                 goto out_release;
1007
1008         /* beacon filtering */
1009         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1010         if (ret)
1011                 goto out_remove_mac;
1012
1013         if (!mvm->bf_allowed_vif &&
1014             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1015                 mvm->bf_allowed_vif = mvmvif;
1016                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1017                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1018         }
1019
1020         /*
1021          * P2P_DEVICE interface does not have a channel context assigned to it,
1022          * so a dedicated PHY context is allocated to it and the corresponding
1023          * MAC context is bound to it at this stage.
1024          */
1025         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1026
1027                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1028                 if (!mvmvif->phy_ctxt) {
1029                         ret = -ENOSPC;
1030                         goto out_free_bf;
1031                 }
1032
1033                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1034                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1035                 if (ret)
1036                         goto out_unref_phy;
1037
1038                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1039                 if (ret)
1040                         goto out_unbind;
1041
1042                 /* Save a pointer to p2p device vif, so it can later be used to
1043                  * update the p2p device MAC when a GO is started/stopped */
1044                 mvm->p2p_device_vif = vif;
1045         }
1046
1047         iwl_mvm_vif_dbgfs_register(mvm, vif);
1048         goto out_unlock;
1049
1050  out_unbind:
1051         iwl_mvm_binding_remove_vif(mvm, vif);
1052  out_unref_phy:
1053         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1054  out_free_bf:
1055         if (mvm->bf_allowed_vif == mvmvif) {
1056                 mvm->bf_allowed_vif = NULL;
1057                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1058                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1059         }
1060  out_remove_mac:
1061         mvmvif->phy_ctxt = NULL;
1062         iwl_mvm_mac_ctxt_remove(mvm, vif);
1063  out_release:
1064         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1065                 mvm->vif_count--;
1066
1067         iwl_mvm_mac_ctxt_release(mvm, vif);
1068  out_unlock:
1069         mutex_unlock(&mvm->mutex);
1070
1071         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1072
1073         return ret;
1074 }
1075
1076 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1077                                         struct ieee80211_vif *vif)
1078 {
1079         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1080
1081         if (tfd_msk) {
1082                 mutex_lock(&mvm->mutex);
1083                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1084                 mutex_unlock(&mvm->mutex);
1085         }
1086
1087         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1088                 /*
1089                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1090                  * We assume here that all the packets sent to the OFFCHANNEL
1091                  * queue are sent in ROC session.
1092                  */
1093                 flush_work(&mvm->roc_done_wk);
1094         } else {
1095                 /*
1096                  * By now, all the AC queues are empty. The AGG queues are
1097                  * empty too. We already got all the Tx responses for all the
1098                  * packets in the queues. The drain work can have been
1099                  * triggered. Flush it.
1100                  */
1101                 flush_work(&mvm->sta_drained_wk);
1102         }
1103 }
1104
1105 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1106                                          struct ieee80211_vif *vif)
1107 {
1108         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1109         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1110
1111         iwl_mvm_prepare_mac_removal(mvm, vif);
1112
1113         mutex_lock(&mvm->mutex);
1114
1115         if (mvm->bf_allowed_vif == mvmvif) {
1116                 mvm->bf_allowed_vif = NULL;
1117                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1118                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1119         }
1120
1121         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1122
1123         /*
1124          * For AP/GO interface, the tear down of the resources allocated to the
1125          * interface is be handled as part of the stop_ap flow.
1126          */
1127         if (vif->type == NL80211_IFTYPE_AP ||
1128             vif->type == NL80211_IFTYPE_ADHOC) {
1129 #ifdef CONFIG_NL80211_TESTMODE
1130                 if (vif == mvm->noa_vif) {
1131                         mvm->noa_vif = NULL;
1132                         mvm->noa_duration = 0;
1133                 }
1134 #endif
1135                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1136                 goto out_release;
1137         }
1138
1139         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1140                 mvm->p2p_device_vif = NULL;
1141                 iwl_mvm_rm_bcast_sta(mvm, vif);
1142                 iwl_mvm_binding_remove_vif(mvm, vif);
1143                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1144                 mvmvif->phy_ctxt = NULL;
1145         }
1146
1147         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1148                 mvm->vif_count--;
1149
1150         iwl_mvm_power_update_mac(mvm);
1151         iwl_mvm_mac_ctxt_remove(mvm, vif);
1152
1153 out_release:
1154         iwl_mvm_mac_ctxt_release(mvm, vif);
1155         mutex_unlock(&mvm->mutex);
1156 }
1157
1158 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1159 {
1160         return 0;
1161 }
1162
1163 struct iwl_mvm_mc_iter_data {
1164         struct iwl_mvm *mvm;
1165         int port_id;
1166 };
1167
1168 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1169                                       struct ieee80211_vif *vif)
1170 {
1171         struct iwl_mvm_mc_iter_data *data = _data;
1172         struct iwl_mvm *mvm = data->mvm;
1173         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1174         int ret, len;
1175
1176         /* if we don't have free ports, mcast frames will be dropped */
1177         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1178                 return;
1179
1180         if (vif->type != NL80211_IFTYPE_STATION ||
1181             !vif->bss_conf.assoc)
1182                 return;
1183
1184         cmd->port_id = data->port_id++;
1185         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1186         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1187
1188         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1189         if (ret)
1190                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1191 }
1192
1193 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1194 {
1195         struct iwl_mvm_mc_iter_data iter_data = {
1196                 .mvm = mvm,
1197         };
1198
1199         lockdep_assert_held(&mvm->mutex);
1200
1201         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1202                 return;
1203
1204         ieee80211_iterate_active_interfaces_atomic(
1205                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1206                 iwl_mvm_mc_iface_iterator, &iter_data);
1207 }
1208
1209 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1210                                      struct netdev_hw_addr_list *mc_list)
1211 {
1212         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1213         struct iwl_mcast_filter_cmd *cmd;
1214         struct netdev_hw_addr *addr;
1215         int addr_count;
1216         bool pass_all;
1217         int len;
1218
1219         addr_count = netdev_hw_addr_list_count(mc_list);
1220         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1221                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1222         if (pass_all)
1223                 addr_count = 0;
1224
1225         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1226         cmd = kzalloc(len, GFP_ATOMIC);
1227         if (!cmd)
1228                 return 0;
1229
1230         if (pass_all) {
1231                 cmd->pass_all = 1;
1232                 return (u64)(unsigned long)cmd;
1233         }
1234
1235         netdev_hw_addr_list_for_each(addr, mc_list) {
1236                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1237                                    cmd->count, addr->addr);
1238                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1239                        addr->addr, ETH_ALEN);
1240                 cmd->count++;
1241         }
1242
1243         return (u64)(unsigned long)cmd;
1244 }
1245
1246 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1247                                      unsigned int changed_flags,
1248                                      unsigned int *total_flags,
1249                                      u64 multicast)
1250 {
1251         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1252         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1253
1254         mutex_lock(&mvm->mutex);
1255
1256         /* replace previous configuration */
1257         kfree(mvm->mcast_filter_cmd);
1258         mvm->mcast_filter_cmd = cmd;
1259
1260         if (!cmd)
1261                 goto out;
1262
1263         iwl_mvm_recalc_multicast(mvm);
1264 out:
1265         mutex_unlock(&mvm->mutex);
1266         *total_flags = 0;
1267 }
1268
1269 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1270 struct iwl_bcast_iter_data {
1271         struct iwl_mvm *mvm;
1272         struct iwl_bcast_filter_cmd *cmd;
1273         u8 current_filter;
1274 };
1275
1276 static void
1277 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1278                          const struct iwl_fw_bcast_filter *in_filter,
1279                          struct iwl_fw_bcast_filter *out_filter)
1280 {
1281         struct iwl_fw_bcast_filter_attr *attr;
1282         int i;
1283
1284         memcpy(out_filter, in_filter, sizeof(*out_filter));
1285
1286         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1287                 attr = &out_filter->attrs[i];
1288
1289                 if (!attr->mask)
1290                         break;
1291
1292                 switch (attr->reserved1) {
1293                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1294                         if (vif->bss_conf.arp_addr_cnt != 1) {
1295                                 attr->mask = 0;
1296                                 continue;
1297                         }
1298
1299                         attr->val = vif->bss_conf.arp_addr_list[0];
1300                         break;
1301                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1302                         attr->val = *(__be32 *)&vif->addr[2];
1303                         break;
1304                 default:
1305                         break;
1306                 }
1307                 attr->reserved1 = 0;
1308                 out_filter->num_attrs++;
1309         }
1310 }
1311
1312 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1313                                           struct ieee80211_vif *vif)
1314 {
1315         struct iwl_bcast_iter_data *data = _data;
1316         struct iwl_mvm *mvm = data->mvm;
1317         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1318         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1319         struct iwl_fw_bcast_mac *bcast_mac;
1320         int i;
1321
1322         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1323                 return;
1324
1325         bcast_mac = &cmd->macs[mvmvif->id];
1326
1327         /*
1328          * enable filtering only for associated stations, but not for P2P
1329          * Clients
1330          */
1331         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1332             !vif->bss_conf.assoc)
1333                 return;
1334
1335         bcast_mac->default_discard = 1;
1336
1337         /* copy all configured filters */
1338         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1339                 /*
1340                  * Make sure we don't exceed our filters limit.
1341                  * if there is still a valid filter to be configured,
1342                  * be on the safe side and just allow bcast for this mac.
1343                  */
1344                 if (WARN_ON_ONCE(data->current_filter >=
1345                                  ARRAY_SIZE(cmd->filters))) {
1346                         bcast_mac->default_discard = 0;
1347                         bcast_mac->attached_filters = 0;
1348                         break;
1349                 }
1350
1351                 iwl_mvm_set_bcast_filter(vif,
1352                                          &mvm->bcast_filters[i],
1353                                          &cmd->filters[data->current_filter]);
1354
1355                 /* skip current filter if it contains no attributes */
1356                 if (!cmd->filters[data->current_filter].num_attrs)
1357                         continue;
1358
1359                 /* attach the filter to current mac */
1360                 bcast_mac->attached_filters |=
1361                                 cpu_to_le16(BIT(data->current_filter));
1362
1363                 data->current_filter++;
1364         }
1365 }
1366
1367 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1368                                     struct iwl_bcast_filter_cmd *cmd)
1369 {
1370         struct iwl_bcast_iter_data iter_data = {
1371                 .mvm = mvm,
1372                 .cmd = cmd,
1373         };
1374
1375         memset(cmd, 0, sizeof(*cmd));
1376         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1377         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1378
1379 #ifdef CONFIG_IWLWIFI_DEBUGFS
1380         /* use debugfs filters/macs if override is configured */
1381         if (mvm->dbgfs_bcast_filtering.override) {
1382                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1383                        sizeof(cmd->filters));
1384                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1385                        sizeof(cmd->macs));
1386                 return true;
1387         }
1388 #endif
1389
1390         /* if no filters are configured, do nothing */
1391         if (!mvm->bcast_filters)
1392                 return false;
1393
1394         /* configure and attach these filters for each associated sta vif */
1395         ieee80211_iterate_active_interfaces(
1396                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1397                 iwl_mvm_bcast_filter_iterator, &iter_data);
1398
1399         return true;
1400 }
1401 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1402                                           struct ieee80211_vif *vif)
1403 {
1404         struct iwl_bcast_filter_cmd cmd;
1405
1406         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1407                 return 0;
1408
1409         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1410                 return 0;
1411
1412         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1413                                     sizeof(cmd), &cmd);
1414 }
1415 #else
1416 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1417                                                  struct ieee80211_vif *vif)
1418 {
1419         return 0;
1420 }
1421 #endif
1422
1423 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1424 {
1425         struct ieee80211_sta *sta;
1426         struct iwl_mvm_sta *mvmsta;
1427         int i;
1428
1429         lockdep_assert_held(&mvm->mutex);
1430
1431         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1432                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1433                                                 lockdep_is_held(&mvm->mutex));
1434                 if (!sta || IS_ERR(sta) || !sta->tdls)
1435                         continue;
1436
1437                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1438                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1439                                 NL80211_TDLS_TEARDOWN,
1440                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1441                                 GFP_KERNEL);
1442         }
1443 }
1444
1445 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1446                                              struct ieee80211_vif *vif,
1447                                              struct ieee80211_bss_conf *bss_conf,
1448                                              u32 changes)
1449 {
1450         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1451         int ret;
1452
1453         /*
1454          * Re-calculate the tsf id, as the master-slave relations depend on the
1455          * beacon interval, which was not known when the station interface was
1456          * added.
1457          */
1458         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1459                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1460
1461         /*
1462          * If we're not associated yet, take the (new) BSSID before associating
1463          * so the firmware knows. If we're already associated, then use the old
1464          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1465          * branch for disassociation below.
1466          */
1467         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1468                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1469
1470         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1471         if (ret)
1472                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1473
1474         /* after sending it once, adopt mac80211 data */
1475         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1476         mvmvif->associated = bss_conf->assoc;
1477
1478         if (changes & BSS_CHANGED_ASSOC) {
1479                 if (bss_conf->assoc) {
1480                         /* add quota for this interface */
1481                         ret = iwl_mvm_update_quotas(mvm, NULL);
1482                         if (ret) {
1483                                 IWL_ERR(mvm, "failed to update quotas\n");
1484                                 return;
1485                         }
1486
1487                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1488                                      &mvm->status)) {
1489                                 /*
1490                                  * If we're restarting then the firmware will
1491                                  * obviously have lost synchronisation with
1492                                  * the AP. It will attempt to synchronise by
1493                                  * itself, but we can make it more reliable by
1494                                  * scheduling a session protection time event.
1495                                  *
1496                                  * The firmware needs to receive a beacon to
1497                                  * catch up with synchronisation, use 110% of
1498                                  * the beacon interval.
1499                                  *
1500                                  * Set a large maximum delay to allow for more
1501                                  * than a single interface.
1502                                  */
1503                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1504                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1505                                                         5 * dur, false);
1506                         }
1507
1508                         iwl_mvm_sf_update(mvm, vif, false);
1509                         iwl_mvm_power_vif_assoc(mvm, vif);
1510                         if (vif->p2p) {
1511                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1512                                 iwl_mvm_update_smps(mvm, vif,
1513                                                     IWL_MVM_SMPS_REQ_PROT,
1514                                                     IEEE80211_SMPS_DYNAMIC);
1515                         }
1516                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1517                         /*
1518                          * If update fails - SF might be running in associated
1519                          * mode while disassociated - which is forbidden.
1520                          */
1521                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1522                                   "Failed to update SF upon disassociation\n");
1523
1524                         /* remove AP station now that the MAC is unassoc */
1525                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1526                         if (ret)
1527                                 IWL_ERR(mvm, "failed to remove AP station\n");
1528
1529                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1530                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1531                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1532                         /* remove quota for this interface */
1533                         ret = iwl_mvm_update_quotas(mvm, NULL);
1534                         if (ret)
1535                                 IWL_ERR(mvm, "failed to update quotas\n");
1536
1537                         if (vif->p2p)
1538                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1539
1540                         /* this will take the cleared BSSID from bss_conf */
1541                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1542                         if (ret)
1543                                 IWL_ERR(mvm,
1544                                         "failed to update MAC %pM (clear after unassoc)\n",
1545                                         vif->addr);
1546                 }
1547
1548                 iwl_mvm_recalc_multicast(mvm);
1549                 iwl_mvm_configure_bcast_filter(mvm, vif);
1550
1551                 /* reset rssi values */
1552                 mvmvif->bf_data.ave_beacon_signal = 0;
1553
1554                 iwl_mvm_bt_coex_vif_change(mvm);
1555                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1556                                     IEEE80211_SMPS_AUTOMATIC);
1557         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1558                 /*
1559                  * We received a beacon _after_ association so
1560                  * remove the session protection.
1561                  */
1562                 iwl_mvm_remove_time_event(mvm, mvmvif,
1563                                           &mvmvif->time_event_data);
1564         }
1565
1566         if (changes & BSS_CHANGED_BEACON_INFO) {
1567                 iwl_mvm_sf_update(mvm, vif, false);
1568                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1569         }
1570
1571         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1572                 ret = iwl_mvm_power_update_mac(mvm);
1573                 if (ret)
1574                         IWL_ERR(mvm, "failed to update power mode\n");
1575         }
1576
1577         if (changes & BSS_CHANGED_TXPOWER) {
1578                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1579                                 bss_conf->txpower);
1580                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1581         }
1582
1583         if (changes & BSS_CHANGED_CQM) {
1584                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1585                 /* reset cqm events tracking */
1586                 mvmvif->bf_data.last_cqm_event = 0;
1587                 if (mvmvif->bf_data.bf_enabled) {
1588                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1589                         if (ret)
1590                                 IWL_ERR(mvm,
1591                                         "failed to update CQM thresholds\n");
1592                 }
1593         }
1594
1595         if (changes & BSS_CHANGED_ARP_FILTER) {
1596                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1597                 iwl_mvm_configure_bcast_filter(mvm, vif);
1598         }
1599 }
1600
1601 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1602                                  struct ieee80211_vif *vif)
1603 {
1604         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1605         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1606         int ret;
1607
1608         /*
1609          * iwl_mvm_mac_ctxt_add() might read directly from the device
1610          * (the system time), so make sure it is available.
1611          */
1612         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1613         if (ret)
1614                 return ret;
1615
1616         mutex_lock(&mvm->mutex);
1617
1618         /* Send the beacon template */
1619         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1620         if (ret)
1621                 goto out_unlock;
1622
1623         /*
1624          * Re-calculate the tsf id, as the master-slave relations depend on the
1625          * beacon interval, which was not known when the AP interface was added.
1626          */
1627         if (vif->type == NL80211_IFTYPE_AP)
1628                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1629
1630         /* Add the mac context */
1631         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1632         if (ret)
1633                 goto out_unlock;
1634
1635         /* Perform the binding */
1636         ret = iwl_mvm_binding_add_vif(mvm, vif);
1637         if (ret)
1638                 goto out_remove;
1639
1640         /* Send the bcast station. At this stage the TBTT and DTIM time events
1641          * are added and applied to the scheduler */
1642         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1643         if (ret)
1644                 goto out_unbind;
1645
1646         /* must be set before quota calculations */
1647         mvmvif->ap_ibss_active = true;
1648
1649         /* power updated needs to be done before quotas */
1650         iwl_mvm_power_update_mac(mvm);
1651
1652         ret = iwl_mvm_update_quotas(mvm, NULL);
1653         if (ret)
1654                 goto out_quota_failed;
1655
1656         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1657         if (vif->p2p && mvm->p2p_device_vif)
1658                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1659
1660         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1661
1662         iwl_mvm_bt_coex_vif_change(mvm);
1663
1664         /* we don't support TDLS during DCM */
1665         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1666                 iwl_mvm_teardown_tdls_peers(mvm);
1667
1668         mutex_unlock(&mvm->mutex);
1669         return 0;
1670
1671 out_quota_failed:
1672         iwl_mvm_power_update_mac(mvm);
1673         mvmvif->ap_ibss_active = false;
1674         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1675 out_unbind:
1676         iwl_mvm_binding_remove_vif(mvm, vif);
1677 out_remove:
1678         iwl_mvm_mac_ctxt_remove(mvm, vif);
1679 out_unlock:
1680         mutex_unlock(&mvm->mutex);
1681         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1682         return ret;
1683 }
1684
1685 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1686                                  struct ieee80211_vif *vif)
1687 {
1688         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1689         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1690
1691         iwl_mvm_prepare_mac_removal(mvm, vif);
1692
1693         mutex_lock(&mvm->mutex);
1694
1695         /* Handle AP stop while in CSA */
1696         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1697                 iwl_mvm_remove_time_event(mvm, mvmvif,
1698                                           &mvmvif->time_event_data);
1699                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1700         }
1701
1702         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1703                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1704                 mvm->csa_tx_block_bcn_timeout = 0;
1705         }
1706
1707         mvmvif->ap_ibss_active = false;
1708         mvm->ap_last_beacon_gp2 = 0;
1709
1710         iwl_mvm_bt_coex_vif_change(mvm);
1711
1712         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1713
1714         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1715         if (vif->p2p && mvm->p2p_device_vif)
1716                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1717
1718         iwl_mvm_update_quotas(mvm, NULL);
1719         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1720         iwl_mvm_binding_remove_vif(mvm, vif);
1721
1722         iwl_mvm_power_update_mac(mvm);
1723
1724         iwl_mvm_mac_ctxt_remove(mvm, vif);
1725
1726         mutex_unlock(&mvm->mutex);
1727 }
1728
1729 static void
1730 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1731                                  struct ieee80211_vif *vif,
1732                                  struct ieee80211_bss_conf *bss_conf,
1733                                  u32 changes)
1734 {
1735         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1736
1737         /* Changes will be applied when the AP/IBSS is started */
1738         if (!mvmvif->ap_ibss_active)
1739                 return;
1740
1741         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1742                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1743             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1744                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1745
1746         /* Need to send a new beacon template to the FW */
1747         if (changes & BSS_CHANGED_BEACON &&
1748             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1749                 IWL_WARN(mvm, "Failed updating beacon data\n");
1750 }
1751
1752 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1753                                      struct ieee80211_vif *vif,
1754                                      struct ieee80211_bss_conf *bss_conf,
1755                                      u32 changes)
1756 {
1757         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1758
1759         /*
1760          * iwl_mvm_bss_info_changed_station() might call
1761          * iwl_mvm_protect_session(), which reads directly from
1762          * the device (the system time), so make sure it is available.
1763          */
1764         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1765                 return;
1766
1767         mutex_lock(&mvm->mutex);
1768
1769         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1770                 iwl_mvm_scan_offload_stop(mvm, true);
1771
1772         switch (vif->type) {
1773         case NL80211_IFTYPE_STATION:
1774                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1775                 break;
1776         case NL80211_IFTYPE_AP:
1777         case NL80211_IFTYPE_ADHOC:
1778                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1779                 break;
1780         default:
1781                 /* shouldn't happen */
1782                 WARN_ON_ONCE(1);
1783         }
1784
1785         mutex_unlock(&mvm->mutex);
1786         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1787 }
1788
1789 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1790                                           enum iwl_scan_status scan_type)
1791 {
1792         int ret;
1793         bool wait_for_handlers = false;
1794
1795         mutex_lock(&mvm->mutex);
1796
1797         if (mvm->scan_status != scan_type) {
1798                 ret = 0;
1799                 /* make sure there are no pending notifications */
1800                 wait_for_handlers = true;
1801                 goto out;
1802         }
1803
1804         switch (scan_type) {
1805         case IWL_MVM_SCAN_SCHED:
1806                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1807                 break;
1808         case IWL_MVM_SCAN_OS:
1809                 ret = iwl_mvm_cancel_scan(mvm);
1810                 break;
1811         case IWL_MVM_SCAN_NONE:
1812         default:
1813                 WARN_ON_ONCE(1);
1814                 ret = -EINVAL;
1815                 break;
1816         }
1817         if (ret)
1818                 goto out;
1819
1820         wait_for_handlers = true;
1821 out:
1822         mutex_unlock(&mvm->mutex);
1823
1824         /* make sure we consume the completion notification */
1825         if (wait_for_handlers)
1826                 iwl_mvm_wait_for_async_handlers(mvm);
1827
1828         return ret;
1829 }
1830 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1831                                struct ieee80211_vif *vif,
1832                                struct ieee80211_scan_request *hw_req)
1833 {
1834         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1835         struct cfg80211_scan_request *req = &hw_req->req;
1836         int ret;
1837
1838         if (req->n_channels == 0 ||
1839             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1840                 return -EINVAL;
1841
1842         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1843         if (ret)
1844                 return ret;
1845
1846         mutex_lock(&mvm->mutex);
1847
1848         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1849                 ret = -EBUSY;
1850                 goto out;
1851         }
1852
1853         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1854
1855         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1856                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1857         else
1858                 ret = iwl_mvm_scan_request(mvm, vif, req);
1859
1860         if (ret)
1861                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1862 out:
1863         mutex_unlock(&mvm->mutex);
1864         return ret;
1865 }
1866
1867 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1868                                        struct ieee80211_vif *vif)
1869 {
1870         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1871
1872         mutex_lock(&mvm->mutex);
1873
1874         iwl_mvm_cancel_scan(mvm);
1875
1876         mutex_unlock(&mvm->mutex);
1877 }
1878
1879 static void
1880 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1881                                   struct ieee80211_sta *sta, u16 tids,
1882                                   int num_frames,
1883                                   enum ieee80211_frame_release_type reason,
1884                                   bool more_data)
1885 {
1886         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1887
1888         /* Called when we need to transmit (a) frame(s) from mac80211 */
1889
1890         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1891                                           tids, more_data, false);
1892 }
1893
1894 static void
1895 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1896                                     struct ieee80211_sta *sta, u16 tids,
1897                                     int num_frames,
1898                                     enum ieee80211_frame_release_type reason,
1899                                     bool more_data)
1900 {
1901         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1902
1903         /* Called when we need to transmit (a) frame(s) from agg queue */
1904
1905         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1906                                           tids, more_data, true);
1907 }
1908
1909 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1910                                    struct ieee80211_vif *vif,
1911                                    enum sta_notify_cmd cmd,
1912                                    struct ieee80211_sta *sta)
1913 {
1914         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1915         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1916         int tid;
1917
1918         switch (cmd) {
1919         case STA_NOTIFY_SLEEP:
1920                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1921                         ieee80211_sta_block_awake(hw, sta, true);
1922                 spin_lock_bh(&mvmsta->lock);
1923                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1924                         struct iwl_mvm_tid_data *tid_data;
1925
1926                         tid_data = &mvmsta->tid_data[tid];
1927                         if (tid_data->state != IWL_AGG_ON &&
1928                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1929                                 continue;
1930                         if (iwl_mvm_tid_queued(tid_data) == 0)
1931                                 continue;
1932                         ieee80211_sta_set_buffered(sta, tid, true);
1933                 }
1934                 spin_unlock_bh(&mvmsta->lock);
1935                 /*
1936                  * The fw updates the STA to be asleep. Tx packets on the Tx
1937                  * queues to this station will not be transmitted. The fw will
1938                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1939                  */
1940                 break;
1941         case STA_NOTIFY_AWAKE:
1942                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1943                         break;
1944                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1945                 break;
1946         default:
1947                 break;
1948         }
1949 }
1950
1951 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1952                                        struct ieee80211_vif *vif,
1953                                        struct ieee80211_sta *sta)
1954 {
1955         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1956         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1957
1958         /*
1959          * This is called before mac80211 does RCU synchronisation,
1960          * so here we already invalidate our internal RCU-protected
1961          * station pointer. The rest of the code will thus no longer
1962          * be able to find the station this way, and we don't rely
1963          * on further RCU synchronisation after the sta_state()
1964          * callback deleted the station.
1965          */
1966         mutex_lock(&mvm->mutex);
1967         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1968                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1969                                    ERR_PTR(-ENOENT));
1970         mutex_unlock(&mvm->mutex);
1971 }
1972
1973 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1974 {
1975         struct ieee80211_sta *sta;
1976         struct iwl_mvm_sta *mvmsta;
1977         int count = 0;
1978         int i;
1979
1980         lockdep_assert_held(&mvm->mutex);
1981
1982         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1983                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1984                                                 lockdep_is_held(&mvm->mutex));
1985                 if (!sta || IS_ERR(sta) || !sta->tdls)
1986                         continue;
1987
1988                 if (vif) {
1989                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1990                         if (mvmsta->vif != vif)
1991                                 continue;
1992                 }
1993
1994                 count++;
1995         }
1996
1997         return count;
1998 }
1999
2000 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
2001                                       struct ieee80211_vif *vif,
2002                                       bool sta_added)
2003 {
2004         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
2005
2006         /*
2007          * Disable ps when the first TDLS sta is added and re-enable it
2008          * when the last TDLS sta is removed
2009          */
2010         if ((tdls_sta_cnt == 1 && sta_added) ||
2011             (tdls_sta_cnt == 0 && !sta_added))
2012                 iwl_mvm_power_update_mac(mvm);
2013 }
2014
2015 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2016                                  struct ieee80211_vif *vif,
2017                                  struct ieee80211_sta *sta,
2018                                  enum ieee80211_sta_state old_state,
2019                                  enum ieee80211_sta_state new_state)
2020 {
2021         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2022         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2023         int ret;
2024
2025         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2026                            sta->addr, old_state, new_state);
2027
2028         /* this would be a mac80211 bug ... but don't crash */
2029         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2030                 return -EINVAL;
2031
2032         /* if a STA is being removed, reuse its ID */
2033         flush_work(&mvm->sta_drained_wk);
2034
2035         mutex_lock(&mvm->mutex);
2036         if (old_state == IEEE80211_STA_NOTEXIST &&
2037             new_state == IEEE80211_STA_NONE) {
2038                 /*
2039                  * Firmware bug - it'll crash if the beacon interval is less
2040                  * than 16. We can't avoid connecting at all, so refuse the
2041                  * station state change, this will cause mac80211 to abandon
2042                  * attempts to connect to this AP, and eventually wpa_s will
2043                  * blacklist the AP...
2044                  */
2045                 if (vif->type == NL80211_IFTYPE_STATION &&
2046                     vif->bss_conf.beacon_int < 16) {
2047                         IWL_ERR(mvm,
2048                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2049                                 sta->addr, vif->bss_conf.beacon_int);
2050                         ret = -EINVAL;
2051                         goto out_unlock;
2052                 }
2053
2054                 if (sta->tdls &&
2055                     (vif->p2p ||
2056                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2057                                                 IWL_MVM_TDLS_STA_COUNT ||
2058                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2059                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2060                         ret = -EBUSY;
2061                         goto out_unlock;
2062                 }
2063
2064                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2065                 if (sta->tdls && ret == 0)
2066                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2067         } else if (old_state == IEEE80211_STA_NONE &&
2068                    new_state == IEEE80211_STA_AUTH) {
2069                 /*
2070                  * EBS may be disabled due to previous failures reported by FW.
2071                  * Reset EBS status here assuming environment has been changed.
2072                  */
2073                 mvm->last_ebs_successful = true;
2074                 ret = 0;
2075         } else if (old_state == IEEE80211_STA_AUTH &&
2076                    new_state == IEEE80211_STA_ASSOC) {
2077                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2078                 if (ret == 0)
2079                         iwl_mvm_rs_rate_init(mvm, sta,
2080                                              mvmvif->phy_ctxt->channel->band,
2081                                              true);
2082         } else if (old_state == IEEE80211_STA_ASSOC &&
2083                    new_state == IEEE80211_STA_AUTHORIZED) {
2084
2085                 /* we don't support TDLS during DCM */
2086                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2087                         iwl_mvm_teardown_tdls_peers(mvm);
2088
2089                 /* enable beacon filtering */
2090                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2091                 ret = 0;
2092         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2093                    new_state == IEEE80211_STA_ASSOC) {
2094                 /* disable beacon filtering */
2095                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2096                 ret = 0;
2097         } else if (old_state == IEEE80211_STA_ASSOC &&
2098                    new_state == IEEE80211_STA_AUTH) {
2099                 ret = 0;
2100         } else if (old_state == IEEE80211_STA_AUTH &&
2101                    new_state == IEEE80211_STA_NONE) {
2102                 ret = 0;
2103         } else if (old_state == IEEE80211_STA_NONE &&
2104                    new_state == IEEE80211_STA_NOTEXIST) {
2105                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2106                 if (sta->tdls)
2107                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2108         } else {
2109                 ret = -EIO;
2110         }
2111  out_unlock:
2112         mutex_unlock(&mvm->mutex);
2113
2114         return ret;
2115 }
2116
2117 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2118 {
2119         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2120
2121         mvm->rts_threshold = value;
2122
2123         return 0;
2124 }
2125
2126 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2127                                   struct ieee80211_vif *vif,
2128                                   struct ieee80211_sta *sta, u32 changed)
2129 {
2130         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2131
2132         if (vif->type == NL80211_IFTYPE_STATION &&
2133             changed & IEEE80211_RC_NSS_CHANGED)
2134                 iwl_mvm_sf_update(mvm, vif, false);
2135 }
2136
2137 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2138                                struct ieee80211_vif *vif, u16 ac,
2139                                const struct ieee80211_tx_queue_params *params)
2140 {
2141         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2142         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2143
2144         mvmvif->queue_params[ac] = *params;
2145
2146         /*
2147          * No need to update right away, we'll get BSS_CHANGED_QOS
2148          * The exception is P2P_DEVICE interface which needs immediate update.
2149          */
2150         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2151                 int ret;
2152
2153                 mutex_lock(&mvm->mutex);
2154                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2155                 mutex_unlock(&mvm->mutex);
2156                 return ret;
2157         }
2158         return 0;
2159 }
2160
2161 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2162                                       struct ieee80211_vif *vif)
2163 {
2164         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2165         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2166                            200 + vif->bss_conf.beacon_int);
2167         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2168                                100 + vif->bss_conf.beacon_int);
2169
2170         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2171                 return;
2172
2173         /*
2174          * iwl_mvm_protect_session() reads directly from the device
2175          * (the system time), so make sure it is available.
2176          */
2177         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2178                 return;
2179
2180         mutex_lock(&mvm->mutex);
2181         /* Try really hard to protect the session and hear a beacon */
2182         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2183         mutex_unlock(&mvm->mutex);
2184
2185         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2186 }
2187
2188 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2189                                                   struct ieee80211_vif *vif)
2190 {
2191         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2192         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2193
2194         /*
2195          * iwl_mvm_protect_session() reads directly from the device
2196          * (the system time), so make sure it is available.
2197          */
2198         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2199                 return;
2200
2201         mutex_lock(&mvm->mutex);
2202         /* Protect the session to hear the TDLS setup response on the channel */
2203         iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
2204         mutex_unlock(&mvm->mutex);
2205
2206         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2207 }
2208
2209 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2210                                         struct ieee80211_vif *vif,
2211                                         struct cfg80211_sched_scan_request *req,
2212                                         struct ieee80211_scan_ies *ies)
2213 {
2214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2215         int ret;
2216
2217         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2218         if (ret)
2219                 return ret;
2220
2221         mutex_lock(&mvm->mutex);
2222
2223         if (!iwl_mvm_is_idle(mvm)) {
2224                 ret = -EBUSY;
2225                 goto out;
2226         }
2227
2228         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2229                 ret = -EBUSY;
2230                 goto out;
2231         }
2232
2233         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2234
2235         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2236                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2237                 if (ret)
2238                         goto err;
2239         }
2240
2241         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2242         if (ret)
2243                 goto err;
2244
2245         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2246                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2247         else
2248                 ret = iwl_mvm_sched_scan_start(mvm, req);
2249
2250         if (!ret)
2251                 goto out;
2252 err:
2253         mvm->scan_status = IWL_MVM_SCAN_NONE;
2254 out:
2255         mutex_unlock(&mvm->mutex);
2256         return ret;
2257 }
2258
2259 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2260                                        struct ieee80211_vif *vif)
2261 {
2262         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2263         int ret;
2264
2265         mutex_lock(&mvm->mutex);
2266         ret = iwl_mvm_scan_offload_stop(mvm, false);
2267         mutex_unlock(&mvm->mutex);
2268         iwl_mvm_wait_for_async_handlers(mvm);
2269
2270         return ret;
2271 }
2272
2273 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2274                                enum set_key_cmd cmd,
2275                                struct ieee80211_vif *vif,
2276                                struct ieee80211_sta *sta,
2277                                struct ieee80211_key_conf *key)
2278 {
2279         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2280         int ret;
2281
2282         if (iwlwifi_mod_params.sw_crypto) {
2283                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2284                 return -EOPNOTSUPP;
2285         }
2286
2287         switch (key->cipher) {
2288         case WLAN_CIPHER_SUITE_TKIP:
2289                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2290                 /* fall-through */
2291         case WLAN_CIPHER_SUITE_CCMP:
2292                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2293                 break;
2294         case WLAN_CIPHER_SUITE_AES_CMAC:
2295                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2296                 break;
2297         case WLAN_CIPHER_SUITE_WEP40:
2298         case WLAN_CIPHER_SUITE_WEP104:
2299                 /*
2300                  * Support for TX only, at least for now, so accept
2301                  * the key and do nothing else. Then mac80211 will
2302                  * pass it for TX but we don't have to use it for RX.
2303                  */
2304                 return 0;
2305         default:
2306                 /* currently FW supports only one optional cipher scheme */
2307                 if (hw->n_cipher_schemes &&
2308                     hw->cipher_schemes->cipher == key->cipher)
2309                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2310                 else
2311                         return -EOPNOTSUPP;
2312         }
2313
2314         mutex_lock(&mvm->mutex);
2315
2316         switch (cmd) {
2317         case SET_KEY:
2318                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2319                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2320                         /*
2321                          * GTK on AP interface is a TX-only key, return 0;
2322                          * on IBSS they're per-station and because we're lazy
2323                          * we don't support them for RX, so do the same.
2324                          */
2325                         ret = 0;
2326                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2327                         break;
2328                 }
2329
2330                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2331                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2332                 if (ret) {
2333                         IWL_WARN(mvm, "set key failed\n");
2334                         /*
2335                          * can't add key for RX, but we don't need it
2336                          * in the device for TX so still return 0
2337                          */
2338                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2339                         ret = 0;
2340                 }
2341
2342                 break;
2343         case DISABLE_KEY:
2344                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2345                         ret = 0;
2346                         break;
2347                 }
2348
2349                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2350                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2351                 break;
2352         default:
2353                 ret = -EINVAL;
2354         }
2355
2356         mutex_unlock(&mvm->mutex);
2357         return ret;
2358 }
2359
2360 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2361                                         struct ieee80211_vif *vif,
2362                                         struct ieee80211_key_conf *keyconf,
2363                                         struct ieee80211_sta *sta,
2364                                         u32 iv32, u16 *phase1key)
2365 {
2366         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2367
2368         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2369                 return;
2370
2371         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2372 }
2373
2374
2375 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2376                                struct iwl_rx_packet *pkt, void *data)
2377 {
2378         struct iwl_mvm *mvm =
2379                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2380         struct iwl_hs20_roc_res *resp;
2381         int resp_len = iwl_rx_packet_payload_len(pkt);
2382         struct iwl_mvm_time_event_data *te_data = data;
2383
2384         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2385                 return true;
2386
2387         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2388                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2389                 return true;
2390         }
2391
2392         resp = (void *)pkt->data;
2393
2394         IWL_DEBUG_TE(mvm,
2395                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2396                      resp->status, resp->event_unique_id);
2397
2398         te_data->uid = le32_to_cpu(resp->event_unique_id);
2399         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2400                      te_data->uid);
2401
2402         spin_lock_bh(&mvm->time_event_lock);
2403         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2404         spin_unlock_bh(&mvm->time_event_lock);
2405
2406         return true;
2407 }
2408
2409 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2410 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2411                                     struct ieee80211_channel *channel,
2412                                     struct ieee80211_vif *vif,
2413                                     int duration)
2414 {
2415         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2416         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2417         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2418         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2419         struct iwl_notification_wait wait_time_event;
2420         struct iwl_hs20_roc_req aux_roc_req = {
2421                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2422                 .id_and_color =
2423                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2424                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2425                 /* Set the channel info data */
2426                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2427                         PHY_BAND_24 : PHY_BAND_5,
2428                 .channel_info.channel = channel->hw_value,
2429                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2430                 /* Set the time and duration */
2431                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2432                 .apply_time_max_delay =
2433                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2434                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2435          };
2436
2437         /* Set the node address */
2438         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2439
2440         te_data->vif = vif;
2441         te_data->duration = duration;
2442         te_data->id = HOT_SPOT_CMD;
2443
2444         lockdep_assert_held(&mvm->mutex);
2445
2446         spin_lock_bh(&mvm->time_event_lock);
2447         list_add_tail(&te_data->list, &mvm->time_event_list);
2448         spin_unlock_bh(&mvm->time_event_lock);
2449
2450         /*
2451          * Use a notification wait, which really just processes the
2452          * command response and doesn't wait for anything, in order
2453          * to be able to process the response and get the UID inside
2454          * the RX path. Using CMD_WANT_SKB doesn't work because it
2455          * stores the buffer and then wakes up this thread, by which
2456          * time another notification (that the time event started)
2457          * might already be processed unsuccessfully.
2458          */
2459         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2460                                    time_event_response,
2461                                    ARRAY_SIZE(time_event_response),
2462                                    iwl_mvm_rx_aux_roc, te_data);
2463
2464         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2465                                    &aux_roc_req);
2466
2467         if (res) {
2468                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2469                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2470                 goto out_clear_te;
2471         }
2472
2473         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2474         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2475         /* should never fail */
2476         WARN_ON_ONCE(res);
2477
2478         if (res) {
2479  out_clear_te:
2480                 spin_lock_bh(&mvm->time_event_lock);
2481                 iwl_mvm_te_clear_data(mvm, te_data);
2482                 spin_unlock_bh(&mvm->time_event_lock);
2483         }
2484
2485         return res;
2486 }
2487
2488 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2489                        struct ieee80211_vif *vif,
2490                        struct ieee80211_channel *channel,
2491                        int duration,
2492                        enum ieee80211_roc_type type)
2493 {
2494         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2495         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2496         struct cfg80211_chan_def chandef;
2497         struct iwl_mvm_phy_ctxt *phy_ctxt;
2498         int ret, i;
2499
2500         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2501                            duration, type);
2502
2503         switch (vif->type) {
2504         case NL80211_IFTYPE_STATION:
2505                 /* Use aux roc framework (HS20) */
2506                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2507                                                vif, duration);
2508                 return ret;
2509         case NL80211_IFTYPE_P2P_DEVICE:
2510                 /* handle below */
2511                 break;
2512         default:
2513                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2514                 return -EINVAL;
2515         }
2516
2517         mutex_lock(&mvm->mutex);
2518
2519         for (i = 0; i < NUM_PHY_CTX; i++) {
2520                 phy_ctxt = &mvm->phy_ctxts[i];
2521                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2522                         continue;
2523
2524                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2525                         /*
2526                          * Unbind the P2P_DEVICE from the current PHY context,
2527                          * and if the PHY context is not used remove it.
2528                          */
2529                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2530                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2531                                 goto out_unlock;
2532
2533                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2534
2535                         /* Bind the P2P_DEVICE to the current PHY Context */
2536                         mvmvif->phy_ctxt = phy_ctxt;
2537
2538                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2539                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2540                                 goto out_unlock;
2541
2542                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2543                         goto schedule_time_event;
2544                 }
2545         }
2546
2547         /* Need to update the PHY context only if the ROC channel changed */
2548         if (channel == mvmvif->phy_ctxt->channel)
2549                 goto schedule_time_event;
2550
2551         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2552
2553         /*
2554          * Change the PHY context configuration as it is currently referenced
2555          * only by the P2P Device MAC
2556          */
2557         if (mvmvif->phy_ctxt->ref == 1) {
2558                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2559                                                &chandef, 1, 1);
2560                 if (ret)
2561                         goto out_unlock;
2562         } else {
2563                 /*
2564                  * The PHY context is shared with other MACs. Need to remove the
2565                  * P2P Device from the binding, allocate an new PHY context and
2566                  * create a new binding
2567                  */
2568                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2569                 if (!phy_ctxt) {
2570                         ret = -ENOSPC;
2571                         goto out_unlock;
2572                 }
2573
2574                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2575                                                1, 1);
2576                 if (ret) {
2577                         IWL_ERR(mvm, "Failed to change PHY context\n");
2578                         goto out_unlock;
2579                 }
2580
2581                 /* Unbind the P2P_DEVICE from the current PHY context */
2582                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2583                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2584                         goto out_unlock;
2585
2586                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2587
2588                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2589                 mvmvif->phy_ctxt = phy_ctxt;
2590
2591                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2592                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2593                         goto out_unlock;
2594
2595                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2596         }
2597
2598 schedule_time_event:
2599         /* Schedule the time events */
2600         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2601
2602 out_unlock:
2603         mutex_unlock(&mvm->mutex);
2604         IWL_DEBUG_MAC80211(mvm, "leave\n");
2605         return ret;
2606 }
2607
2608 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2609 {
2610         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2611
2612         IWL_DEBUG_MAC80211(mvm, "enter\n");
2613
2614         mutex_lock(&mvm->mutex);
2615         iwl_mvm_stop_p2p_roc(mvm);
2616         mutex_unlock(&mvm->mutex);
2617
2618         IWL_DEBUG_MAC80211(mvm, "leave\n");
2619         return 0;
2620 }
2621
2622 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2623                                  struct ieee80211_chanctx_conf *ctx)
2624 {
2625         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2626         struct iwl_mvm_phy_ctxt *phy_ctxt;
2627         int ret;
2628
2629         lockdep_assert_held(&mvm->mutex);
2630
2631         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2632
2633         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2634         if (!phy_ctxt) {
2635                 ret = -ENOSPC;
2636                 goto out;
2637         }
2638
2639         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2640                                        ctx->rx_chains_static,
2641                                        ctx->rx_chains_dynamic);
2642         if (ret) {
2643                 IWL_ERR(mvm, "Failed to add PHY context\n");
2644                 goto out;
2645         }
2646
2647         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2648         *phy_ctxt_id = phy_ctxt->id;
2649 out:
2650         return ret;
2651 }
2652
2653 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2654                                struct ieee80211_chanctx_conf *ctx)
2655 {
2656         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2657         int ret;
2658
2659         mutex_lock(&mvm->mutex);
2660         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2661         mutex_unlock(&mvm->mutex);
2662
2663         return ret;
2664 }
2665
2666 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2667                                      struct ieee80211_chanctx_conf *ctx)
2668 {
2669         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2670         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2671
2672         lockdep_assert_held(&mvm->mutex);
2673
2674         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2675 }
2676
2677 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2678                                    struct ieee80211_chanctx_conf *ctx)
2679 {
2680         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2681
2682         mutex_lock(&mvm->mutex);
2683         __iwl_mvm_remove_chanctx(mvm, ctx);
2684         mutex_unlock(&mvm->mutex);
2685 }
2686
2687 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2688                                    struct ieee80211_chanctx_conf *ctx,
2689                                    u32 changed)
2690 {
2691         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2692         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2693         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2694
2695         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2696                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2697                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2698                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2699                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2700                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2701                       phy_ctxt->ref, changed))
2702                 return;
2703
2704         mutex_lock(&mvm->mutex);
2705         iwl_mvm_bt_coex_vif_change(mvm);
2706         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2707                                  ctx->rx_chains_static,
2708                                  ctx->rx_chains_dynamic);
2709         mutex_unlock(&mvm->mutex);
2710 }
2711
2712 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2713                                         struct ieee80211_vif *vif,
2714                                         struct ieee80211_chanctx_conf *ctx,
2715                                         bool switching_chanctx)
2716 {
2717         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2718         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2719         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2720         int ret;
2721
2722         lockdep_assert_held(&mvm->mutex);
2723
2724         mvmvif->phy_ctxt = phy_ctxt;
2725
2726         switch (vif->type) {
2727         case NL80211_IFTYPE_AP:
2728                 /* Unless it's a CSA flow we have nothing to do here */
2729                 if (vif->csa_active) {
2730                         mvmvif->ap_ibss_active = true;
2731                         break;
2732                 }
2733         case NL80211_IFTYPE_ADHOC:
2734                 /*
2735                  * The AP binding flow is handled as part of the start_ap flow
2736                  * (in bss_info_changed), similarly for IBSS.
2737                  */
2738                 ret = 0;
2739                 goto out;
2740         case NL80211_IFTYPE_STATION:
2741                 break;
2742         case NL80211_IFTYPE_MONITOR:
2743                 /* always disable PS when a monitor interface is active */
2744                 mvmvif->ps_disabled = true;
2745                 break;
2746         default:
2747                 ret = -EINVAL;
2748                 goto out;
2749         }
2750
2751         ret = iwl_mvm_binding_add_vif(mvm, vif);
2752         if (ret)
2753                 goto out;
2754
2755         /*
2756          * Power state must be updated before quotas,
2757          * otherwise fw will complain.
2758          */
2759         iwl_mvm_power_update_mac(mvm);
2760
2761         /* Setting the quota at this stage is only required for monitor
2762          * interfaces. For the other types, the bss_info changed flow
2763          * will handle quota settings.
2764          */
2765         if (vif->type == NL80211_IFTYPE_MONITOR) {
2766                 mvmvif->monitor_active = true;
2767                 ret = iwl_mvm_update_quotas(mvm, NULL);
2768                 if (ret)
2769                         goto out_remove_binding;
2770         }
2771
2772         /* Handle binding during CSA */
2773         if ((vif->type == NL80211_IFTYPE_AP) ||
2774             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2775                 iwl_mvm_update_quotas(mvm, NULL);
2776                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2777         }
2778
2779         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2780                 struct iwl_mvm_sta *mvmsta;
2781
2782                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2783                                                           mvmvif->ap_sta_id);
2784
2785                 if (WARN_ON(!mvmsta))
2786                         goto out;
2787
2788                 /* TODO: only re-enable after the first beacon */
2789                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2790         }
2791
2792         goto out;
2793
2794 out_remove_binding:
2795         iwl_mvm_binding_remove_vif(mvm, vif);
2796         iwl_mvm_power_update_mac(mvm);
2797 out:
2798         if (ret)
2799                 mvmvif->phy_ctxt = NULL;
2800         return ret;
2801 }
2802 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2803                                       struct ieee80211_vif *vif,
2804                                       struct ieee80211_chanctx_conf *ctx)
2805 {
2806         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2807         int ret;
2808
2809         mutex_lock(&mvm->mutex);
2810         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2811         mutex_unlock(&mvm->mutex);
2812
2813         return ret;
2814 }
2815
2816 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2817                                            struct ieee80211_vif *vif,
2818                                            struct ieee80211_chanctx_conf *ctx,
2819                                            bool switching_chanctx)
2820 {
2821         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2822         struct ieee80211_vif *disabled_vif = NULL;
2823         struct iwl_mvm_sta *mvmsta;
2824
2825         lockdep_assert_held(&mvm->mutex);
2826
2827         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2828
2829         switch (vif->type) {
2830         case NL80211_IFTYPE_ADHOC:
2831                 goto out;
2832         case NL80211_IFTYPE_MONITOR:
2833                 mvmvif->monitor_active = false;
2834                 mvmvif->ps_disabled = false;
2835                 break;
2836         case NL80211_IFTYPE_AP:
2837                 /* This part is triggered only during CSA */
2838                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2839                         goto out;
2840
2841                 /* Set CS bit on all the stations */
2842                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2843
2844                 /* Save blocked iface, the timeout is set on the next beacon */
2845                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2846
2847                 mvmvif->ap_ibss_active = false;
2848                 break;
2849         case NL80211_IFTYPE_STATION:
2850                 if (!switching_chanctx)
2851                         break;
2852
2853                 disabled_vif = vif;
2854
2855                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2856                                                           mvmvif->ap_sta_id);
2857
2858                 if (!WARN_ON(!mvmsta))
2859                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2860
2861                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2862                 break;
2863         default:
2864                 break;
2865         }
2866
2867         iwl_mvm_update_quotas(mvm, disabled_vif);
2868         iwl_mvm_binding_remove_vif(mvm, vif);
2869
2870 out:
2871         mvmvif->phy_ctxt = NULL;
2872         iwl_mvm_power_update_mac(mvm);
2873 }
2874
2875 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2876                                          struct ieee80211_vif *vif,
2877                                          struct ieee80211_chanctx_conf *ctx)
2878 {
2879         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2880
2881         mutex_lock(&mvm->mutex);
2882         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2883         mutex_unlock(&mvm->mutex);
2884 }
2885
2886 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2887                                       struct ieee80211_vif_chanctx_switch *vifs,
2888                                       int n_vifs,
2889                                       enum ieee80211_chanctx_switch_mode mode)
2890 {
2891         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2892         int ret;
2893
2894         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2895         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2896                 return -EOPNOTSUPP;
2897
2898         mutex_lock(&mvm->mutex);
2899         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2900         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2901
2902         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2903         if (ret) {
2904                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2905                 goto out_reassign;
2906         }
2907
2908         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2909                                            true);
2910         if (ret) {
2911                 IWL_ERR(mvm,
2912                         "failed to assign new_ctx during channel switch\n");
2913                 goto out_remove;
2914         }
2915
2916         /* we don't support TDLS during DCM - can be caused by channel switch */
2917         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2918                 iwl_mvm_teardown_tdls_peers(mvm);
2919
2920         goto out;
2921
2922 out_remove:
2923         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2924
2925 out_reassign:
2926         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2927         if (ret) {
2928                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2929                 goto out_restart;
2930         }
2931
2932         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2933                                            true);
2934         if (ret) {
2935                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2936                 goto out_restart;
2937         }
2938
2939         goto out;
2940
2941 out_restart:
2942         /* things keep failing, better restart the hw */
2943         iwl_mvm_nic_restart(mvm, false);
2944
2945 out:
2946         mutex_unlock(&mvm->mutex);
2947         return ret;
2948 }
2949
2950 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2951                            struct ieee80211_sta *sta,
2952                            bool set)
2953 {
2954         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2955         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2956
2957         if (!mvm_sta || !mvm_sta->vif) {
2958                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2959                 return -EINVAL;
2960         }
2961
2962         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2963 }
2964
2965 #ifdef CONFIG_NL80211_TESTMODE
2966 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2967         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2968         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2969         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2970 };
2971
2972 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2973                                       struct ieee80211_vif *vif,
2974                                       void *data, int len)
2975 {
2976         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2977         int err;
2978         u32 noa_duration;
2979
2980         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2981         if (err)
2982                 return err;
2983
2984         if (!tb[IWL_MVM_TM_ATTR_CMD])
2985                 return -EINVAL;
2986
2987         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2988         case IWL_MVM_TM_CMD_SET_NOA:
2989                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2990                     !vif->bss_conf.enable_beacon ||
2991                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2992                         return -EINVAL;
2993
2994                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2995                 if (noa_duration >= vif->bss_conf.beacon_int)
2996                         return -EINVAL;
2997
2998                 mvm->noa_duration = noa_duration;
2999                 mvm->noa_vif = vif;
3000
3001                 return iwl_mvm_update_quotas(mvm, NULL);
3002         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3003                 /* must be associated client vif - ignore authorized */
3004                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3005                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3006                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3007                         return -EINVAL;
3008
3009                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3010                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3011                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3012         }
3013
3014         return -EOPNOTSUPP;
3015 }
3016
3017 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3018                                     struct ieee80211_vif *vif,
3019                                     void *data, int len)
3020 {
3021         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3022         int err;
3023
3024         mutex_lock(&mvm->mutex);
3025         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3026         mutex_unlock(&mvm->mutex);
3027
3028         return err;
3029 }
3030 #endif
3031
3032 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3033                                           struct ieee80211_vif *vif,
3034                                           struct cfg80211_chan_def *chandef)
3035 {
3036         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3037         struct ieee80211_vif *csa_vif;
3038
3039         mutex_lock(&mvm->mutex);
3040
3041         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3042                                             lockdep_is_held(&mvm->mutex));
3043         if (WARN(csa_vif && csa_vif->csa_active,
3044                  "Another CSA is already in progress"))
3045                 goto out_unlock;
3046
3047         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3048                            chandef->center_freq1);
3049         rcu_assign_pointer(mvm->csa_vif, vif);
3050
3051 out_unlock:
3052         mutex_unlock(&mvm->mutex);
3053 }
3054
3055 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3056                               struct ieee80211_vif *vif, u32 queues, bool drop)
3057 {
3058         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3059         struct iwl_mvm_vif *mvmvif;
3060         struct iwl_mvm_sta *mvmsta;
3061
3062         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3063                 return;
3064
3065         mutex_lock(&mvm->mutex);
3066         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3067         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3068
3069         if (WARN_ON_ONCE(!mvmsta))
3070                 goto done;
3071
3072         if (drop) {
3073                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3074                         IWL_ERR(mvm, "flush request fail\n");
3075         } else {
3076                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3077                                               mvmsta->tfd_queue_msk);
3078         }
3079 done:
3080         mutex_unlock(&mvm->mutex);
3081 }
3082
3083 const struct ieee80211_ops iwl_mvm_hw_ops = {
3084         .tx = iwl_mvm_mac_tx,
3085         .ampdu_action = iwl_mvm_mac_ampdu_action,
3086         .start = iwl_mvm_mac_start,
3087         .restart_complete = iwl_mvm_mac_restart_complete,
3088         .stop = iwl_mvm_mac_stop,
3089         .add_interface = iwl_mvm_mac_add_interface,
3090         .remove_interface = iwl_mvm_mac_remove_interface,
3091         .config = iwl_mvm_mac_config,
3092         .prepare_multicast = iwl_mvm_prepare_multicast,
3093         .configure_filter = iwl_mvm_configure_filter,
3094         .bss_info_changed = iwl_mvm_bss_info_changed,
3095         .hw_scan = iwl_mvm_mac_hw_scan,
3096         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3097         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3098         .sta_state = iwl_mvm_mac_sta_state,
3099         .sta_notify = iwl_mvm_mac_sta_notify,
3100         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3101         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3102         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3103         .sta_rc_update = iwl_mvm_sta_rc_update,
3104         .conf_tx = iwl_mvm_mac_conf_tx,
3105         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3106         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3107         .flush = iwl_mvm_mac_flush,
3108         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3109         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3110         .set_key = iwl_mvm_mac_set_key,
3111         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3112         .remain_on_channel = iwl_mvm_roc,
3113         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3114         .add_chanctx = iwl_mvm_add_chanctx,
3115         .remove_chanctx = iwl_mvm_remove_chanctx,
3116         .change_chanctx = iwl_mvm_change_chanctx,
3117         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3118         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3119         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3120
3121         .start_ap = iwl_mvm_start_ap_ibss,
3122         .stop_ap = iwl_mvm_stop_ap_ibss,
3123         .join_ibss = iwl_mvm_start_ap_ibss,
3124         .leave_ibss = iwl_mvm_stop_ap_ibss,
3125
3126         .set_tim = iwl_mvm_set_tim,
3127
3128         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3129
3130         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3131
3132 #ifdef CONFIG_PM_SLEEP
3133         /* look at d3.c */
3134         .suspend = iwl_mvm_suspend,
3135         .resume = iwl_mvm_resume,
3136         .set_wakeup = iwl_mvm_set_wakeup,
3137         .set_rekey_data = iwl_mvm_set_rekey_data,
3138 #if IS_ENABLED(CONFIG_IPV6)
3139         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3140 #endif
3141         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3142 #endif
3143 };