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 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 674 {
 675         struct iwl_fw_error_dump_file *dump_file;
 676         struct iwl_fw_error_dump_data *dump_data;
 677         struct iwl_fw_error_dump_info *dump_info;
 678         struct iwl_mvm_dump_ptrs *fw_error_dump;
 679         const struct fw_img *img;
 680         u32 sram_len, sram_ofs;
 681         u32 file_len, rxf_len;
 682         unsigned long flags;
 683         int reg_val;
 684
 685         lockdep_assert_held(&mvm->mutex);
 686
 687         if (mvm->fw_error_dump)
 688                 return;
 689
 690         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 691         if (!fw_error_dump)
 692                 return;
 693
 694         img = &mvm->fw->img[mvm->cur_ucode];
 695         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 696         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 697
 698         /* reading buffer size */
 699         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 700         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 701
 702         /* the register holds the value divided by 128 */
 703         rxf_len = rxf_len << 7;
 704
 705         file_len = sizeof(*dump_file) +
 706                    sizeof(*dump_data) * 3 +
 707                    sram_len +
 708                    rxf_len +
 709                    sizeof(*dump_info);
 710
 711         dump_file = vzalloc(file_len);
 712         if (!dump_file) {
 713                 kfree(fw_error_dump);
 714                 return;
 715         }
 716
 717         fw_error_dump->op_mode_ptr = dump_file;
 718
 719         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 720         dump_data = (void *)dump_file->data;
 721
 722         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 723         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 724         dump_info = (void *) dump_data->data;
 725         dump_info->device_family =
 726                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 727                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 728                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 729         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 730                sizeof(dump_info->fw_human_readable));
 731         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 732                 sizeof(dump_info->dev_human_readable));
 733         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 734                 sizeof(dump_info->bus_human_readable));
 735
 736         dump_data = iwl_fw_error_next_data(dump_data);
 737         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 738         dump_data->len = cpu_to_le32(rxf_len);
 739
 740         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 741                 u32 *rxf = (void *)dump_data->data;
 742                 int i;
 743
 744                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 745                         iwl_trans_write_prph(mvm->trans,
 746                                              RXF_LD_FENCE_OFFSET_ADDR,
 747                                              i * sizeof(u32));
 748                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 749                                                      RXF_FIFO_RD_FENCE_ADDR);
 750                 }
 751                 iwl_trans_release_nic_access(mvm->trans, &flags);
 752         }
 753
 754         dump_data = iwl_fw_error_next_data(dump_data);
 755         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 756         dump_data->len = cpu_to_le32(sram_len);
 757         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 758                                  sram_len);
 759
 760         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 761         fw_error_dump->op_mode_len = file_len;
 762         if (fw_error_dump->trans_ptr)
 763                 file_len += fw_error_dump->trans_ptr->len;
 764         dump_file->file_len = cpu_to_le32(file_len);
 765         mvm->fw_error_dump = fw_error_dump;
 766 }
 767 #endif
 768
 769 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 770 {
 771 #ifdef CONFIG_IWLWIFI_DEBUGFS
 772         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 773
 774         iwl_mvm_fw_error_dump(mvm);
 775
 776         /* notify the userspace about the error we had */
 777         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 778 #endif
 779
 780         iwl_trans_stop_device(mvm->trans);
 781
 782         mvm->scan_status = IWL_MVM_SCAN_NONE;
 783         mvm->ps_disabled = false;
 784
 785         /* just in case one was running */
 786         ieee80211_remain_on_channel_expired(mvm->hw);
 787
 788         ieee80211_iterate_active_interfaces_atomic(
 789                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 790                 iwl_mvm_cleanup_iterator, mvm);
 791
 792         mvm->p2p_device_vif = NULL;
 793         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 794
 795         iwl_mvm_reset_phy_ctxts(mvm);
 796         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 797         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 798         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 799         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 800         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 801         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 802         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 803         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 804
 805         ieee80211_wake_queues(mvm->hw);
 806
 807         /* cleanup all stale references (scan, roc), but keep the
 808          * ucode_down ref until reconfig is complete */
 809         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 810
 811         /* clear any stale d0i3 state */
 812         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 813
 814         mvm->vif_count = 0;
 815         mvm->rx_ba_sessions = 0;
 816 }
 817
 818 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 819 {
 820         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 821         int ret;
 822
 823         mutex_lock(&mvm->mutex);
 824
 825         /* Clean up some internal and mac80211 state on restart */
 826         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 827                 iwl_mvm_restart_cleanup(mvm);
 828
 829         ret = iwl_mvm_up(mvm);
 830
 831         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 832                 /* Something went wrong - we need to finish some cleanup
 833                  * that normally iwl_mvm_mac_restart_complete() below
 834                  * would do.
 835                  */
 836                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 837                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 838         }
 839
 840         mutex_unlock(&mvm->mutex);
 841
 842         return ret;
 843 }
 844
 845 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 846 {
 847         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 848         int ret;
 849
 850         mutex_lock(&mvm->mutex);
 851
 852         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 853         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 854         ret = iwl_mvm_update_quotas(mvm, NULL);
 855         if (ret)
 856                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 857                         ret);
 858
 859         /* allow transport/FW low power modes */
 860         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 861
 862         mutex_unlock(&mvm->mutex);
 863 }
 864
 865 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 866 {
 867         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 868
 869         flush_work(&mvm->d0i3_exit_work);
 870         flush_work(&mvm->async_handlers_wk);
 871
 872         mutex_lock(&mvm->mutex);
 873
 874         /* disallow low power states when the FW is down */
 875         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 876
 877         /* async_handlers_wk is now blocked */
 878
 879         /*
 880          * The work item could be running or queued if the
 881          * ROC time event stops just as we get here.
 882          */
 883         cancel_work_sync(&mvm->roc_done_wk);
 884
 885         iwl_trans_stop_device(mvm->trans);
 886
 887         iwl_mvm_async_handlers_purge(mvm);
 888         /* async_handlers_list is empty and will stay empty: HW is stopped */
 889
 890         /* the fw is stopped, the aux sta is dead: clean up driver state */
 891         iwl_mvm_del_aux_sta(mvm);
 892
 893         mvm->ucode_loaded = false;
 894
 895         mutex_unlock(&mvm->mutex);
 896
 897         /*
 898          * The worker might have been waiting for the mutex, let it run and
 899          * discover that its list is now empty.
 900          */
 901         cancel_work_sync(&mvm->async_handlers_wk);
 902 }
 903
 904 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 905 {
 906         u16 i;
 907
 908         lockdep_assert_held(&mvm->mutex);
 909
 910         for (i = 0; i < NUM_PHY_CTX; i++)
 911                 if (!mvm->phy_ctxts[i].ref)
 912                         return &mvm->phy_ctxts[i];
 913
 914         IWL_ERR(mvm, "No available PHY context\n");
 915         return NULL;
 916 }
 917
 918 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 919                                 s8 tx_power)
 920 {
 921         /* FW is in charge of regulatory enforcement */
 922         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 923                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 924                 .pwr_restriction = cpu_to_le16(tx_power),
 925         };
 926
 927         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 928                                     sizeof(reduce_txpwr_cmd),
 929                                     &reduce_txpwr_cmd);
 930 }
 931
 932 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 933                                      struct ieee80211_vif *vif)
 934 {
 935         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 936         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 937         int ret;
 938
 939         /*
 940          * make sure D0i3 exit is completed, otherwise a target access
 941          * during tx queue configuration could be done when still in
 942          * D0i3 state.
 943          */
 944         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 945         if (ret)
 946                 return ret;
 947
 948         /*
 949          * Not much to do here. The stack will not allow interface
 950          * types or combinations that we didn't advertise, so we
 951          * don't really have to check the types.
 952          */
 953
 954         mutex_lock(&mvm->mutex);
 955
 956         /* Allocate resources for the MAC context, and add it to the fw  */
 957         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 958         if (ret)
 959                 goto out_unlock;
 960
 961         /* Counting number of interfaces is needed for legacy PM */
 962         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 963                 mvm->vif_count++;
 964
 965         /*
 966          * The AP binding flow can be done only after the beacon
 967          * template is configured (which happens only in the mac80211
 968          * start_ap() flow), and adding the broadcast station can happen
 969          * only after the binding.
 970          * In addition, since modifying the MAC before adding a bcast
 971          * station is not allowed by the FW, delay the adding of MAC context to
 972          * the point where we can also add the bcast station.
 973          * In short: there's not much we can do at this point, other than
 974          * allocating resources :)
 975          */
 976         if (vif->type == NL80211_IFTYPE_AP ||
 977             vif->type == NL80211_IFTYPE_ADHOC) {
 978                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
 979                 if (ret) {
 980                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 981                         goto out_release;
 982                 }
 983
 984                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 985                 goto out_unlock;
 986         }
 987
 988         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 989         if (ret)
 990                 goto out_release;
 991
 992         ret = iwl_mvm_power_update_mac(mvm);
 993         if (ret)
 994                 goto out_release;
 995
 996         /* beacon filtering */
 997         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 998         if (ret)
 999                 goto out_remove_mac;
1000
1001         if (!mvm->bf_allowed_vif &&
1002             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1003                 mvm->bf_allowed_vif = mvmvif;
1004                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1005                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1006         }
1007
1008         /*
1009          * P2P_DEVICE interface does not have a channel context assigned to it,
1010          * so a dedicated PHY context is allocated to it and the corresponding
1011          * MAC context is bound to it at this stage.
1012          */
1013         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1014
1015                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1016                 if (!mvmvif->phy_ctxt) {
1017                         ret = -ENOSPC;
1018                         goto out_free_bf;
1019                 }
1020
1021                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1022                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1023                 if (ret)
1024                         goto out_unref_phy;
1025
1026                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1027                 if (ret)
1028                         goto out_unbind;
1029
1030                 /* Save a pointer to p2p device vif, so it can later be used to
1031                  * update the p2p device MAC when a GO is started/stopped */
1032                 mvm->p2p_device_vif = vif;
1033         }
1034
1035         iwl_mvm_vif_dbgfs_register(mvm, vif);
1036         goto out_unlock;
1037
1038  out_unbind:
1039         iwl_mvm_binding_remove_vif(mvm, vif);
1040  out_unref_phy:
1041         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1042  out_free_bf:
1043         if (mvm->bf_allowed_vif == mvmvif) {
1044                 mvm->bf_allowed_vif = NULL;
1045                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1046                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1047         }
1048  out_remove_mac:
1049         mvmvif->phy_ctxt = NULL;
1050         iwl_mvm_mac_ctxt_remove(mvm, vif);
1051  out_release:
1052         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1053                 mvm->vif_count--;
1054
1055         iwl_mvm_mac_ctxt_release(mvm, vif);
1056  out_unlock:
1057         mutex_unlock(&mvm->mutex);
1058
1059         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1060
1061         return ret;
1062 }
1063
1064 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1065                                         struct ieee80211_vif *vif)
1066 {
1067         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1068
1069         if (tfd_msk) {
1070                 mutex_lock(&mvm->mutex);
1071                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1072                 mutex_unlock(&mvm->mutex);
1073         }
1074
1075         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1076                 /*
1077                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1078                  * We assume here that all the packets sent to the OFFCHANNEL
1079                  * queue are sent in ROC session.
1080                  */
1081                 flush_work(&mvm->roc_done_wk);
1082         } else {
1083                 /*
1084                  * By now, all the AC queues are empty. The AGG queues are
1085                  * empty too. We already got all the Tx responses for all the
1086                  * packets in the queues. The drain work can have been
1087                  * triggered. Flush it.
1088                  */
1089                 flush_work(&mvm->sta_drained_wk);
1090         }
1091 }
1092
1093 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1094                                          struct ieee80211_vif *vif)
1095 {
1096         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1097         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1098
1099         iwl_mvm_prepare_mac_removal(mvm, vif);
1100
1101         mutex_lock(&mvm->mutex);
1102
1103         if (mvm->bf_allowed_vif == mvmvif) {
1104                 mvm->bf_allowed_vif = NULL;
1105                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1106                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1107         }
1108
1109         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1110
1111         /*
1112          * For AP/GO interface, the tear down of the resources allocated to the
1113          * interface is be handled as part of the stop_ap flow.
1114          */
1115         if (vif->type == NL80211_IFTYPE_AP ||
1116             vif->type == NL80211_IFTYPE_ADHOC) {
1117 #ifdef CONFIG_NL80211_TESTMODE
1118                 if (vif == mvm->noa_vif) {
1119                         mvm->noa_vif = NULL;
1120                         mvm->noa_duration = 0;
1121                 }
1122 #endif
1123                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1124                 goto out_release;
1125         }
1126
1127         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1128                 mvm->p2p_device_vif = NULL;
1129                 iwl_mvm_rm_bcast_sta(mvm, vif);
1130                 iwl_mvm_binding_remove_vif(mvm, vif);
1131                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1132                 mvmvif->phy_ctxt = NULL;
1133         }
1134
1135         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1136                 mvm->vif_count--;
1137
1138         iwl_mvm_power_update_mac(mvm);
1139         iwl_mvm_mac_ctxt_remove(mvm, vif);
1140
1141 out_release:
1142         iwl_mvm_mac_ctxt_release(mvm, vif);
1143         mutex_unlock(&mvm->mutex);
1144 }
1145
1146 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1147 {
1148         return 0;
1149 }
1150
1151 struct iwl_mvm_mc_iter_data {
1152         struct iwl_mvm *mvm;
1153         int port_id;
1154 };
1155
1156 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1157                                       struct ieee80211_vif *vif)
1158 {
1159         struct iwl_mvm_mc_iter_data *data = _data;
1160         struct iwl_mvm *mvm = data->mvm;
1161         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1162         int ret, len;
1163
1164         /* if we don't have free ports, mcast frames will be dropped */
1165         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1166                 return;
1167
1168         if (vif->type != NL80211_IFTYPE_STATION ||
1169             !vif->bss_conf.assoc)
1170                 return;
1171
1172         cmd->port_id = data->port_id++;
1173         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1174         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1175
1176         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1177         if (ret)
1178                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1179 }
1180
1181 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1182 {
1183         struct iwl_mvm_mc_iter_data iter_data = {
1184                 .mvm = mvm,
1185         };
1186
1187         lockdep_assert_held(&mvm->mutex);
1188
1189         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1190                 return;
1191
1192         ieee80211_iterate_active_interfaces_atomic(
1193                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1194                 iwl_mvm_mc_iface_iterator, &iter_data);
1195 }
1196
1197 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1198                                      struct netdev_hw_addr_list *mc_list)
1199 {
1200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1201         struct iwl_mcast_filter_cmd *cmd;
1202         struct netdev_hw_addr *addr;
1203         int addr_count;
1204         bool pass_all;
1205         int len;
1206
1207         addr_count = netdev_hw_addr_list_count(mc_list);
1208         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1209                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1210         if (pass_all)
1211                 addr_count = 0;
1212
1213         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1214         cmd = kzalloc(len, GFP_ATOMIC);
1215         if (!cmd)
1216                 return 0;
1217
1218         if (pass_all) {
1219                 cmd->pass_all = 1;
1220                 return (u64)(unsigned long)cmd;
1221         }
1222
1223         netdev_hw_addr_list_for_each(addr, mc_list) {
1224                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1225                                    cmd->count, addr->addr);
1226                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1227                        addr->addr, ETH_ALEN);
1228                 cmd->count++;
1229         }
1230
1231         return (u64)(unsigned long)cmd;
1232 }
1233
1234 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1235                                      unsigned int changed_flags,
1236                                      unsigned int *total_flags,
1237                                      u64 multicast)
1238 {
1239         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1240         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1241
1242         mutex_lock(&mvm->mutex);
1243
1244         /* replace previous configuration */
1245         kfree(mvm->mcast_filter_cmd);
1246         mvm->mcast_filter_cmd = cmd;
1247
1248         if (!cmd)
1249                 goto out;
1250
1251         iwl_mvm_recalc_multicast(mvm);
1252 out:
1253         mutex_unlock(&mvm->mutex);
1254         *total_flags = 0;
1255 }
1256
1257 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1258 struct iwl_bcast_iter_data {
1259         struct iwl_mvm *mvm;
1260         struct iwl_bcast_filter_cmd *cmd;
1261         u8 current_filter;
1262 };
1263
1264 static void
1265 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1266                          const struct iwl_fw_bcast_filter *in_filter,
1267                          struct iwl_fw_bcast_filter *out_filter)
1268 {
1269         struct iwl_fw_bcast_filter_attr *attr;
1270         int i;
1271
1272         memcpy(out_filter, in_filter, sizeof(*out_filter));
1273
1274         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1275                 attr = &out_filter->attrs[i];
1276
1277                 if (!attr->mask)
1278                         break;
1279
1280                 switch (attr->reserved1) {
1281                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1282                         if (vif->bss_conf.arp_addr_cnt != 1) {
1283                                 attr->mask = 0;
1284                                 continue;
1285                         }
1286
1287                         attr->val = vif->bss_conf.arp_addr_list[0];
1288                         break;
1289                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1290                         attr->val = *(__be32 *)&vif->addr[2];
1291                         break;
1292                 default:
1293                         break;
1294                 }
1295                 attr->reserved1 = 0;
1296                 out_filter->num_attrs++;
1297         }
1298 }
1299
1300 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1301                                           struct ieee80211_vif *vif)
1302 {
1303         struct iwl_bcast_iter_data *data = _data;
1304         struct iwl_mvm *mvm = data->mvm;
1305         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1306         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1307         struct iwl_fw_bcast_mac *bcast_mac;
1308         int i;
1309
1310         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1311                 return;
1312
1313         bcast_mac = &cmd->macs[mvmvif->id];
1314
1315         /*
1316          * enable filtering only for associated stations, but not for P2P
1317          * Clients
1318          */
1319         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1320             !vif->bss_conf.assoc)
1321                 return;
1322
1323         bcast_mac->default_discard = 1;
1324
1325         /* copy all configured filters */
1326         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1327                 /*
1328                  * Make sure we don't exceed our filters limit.
1329                  * if there is still a valid filter to be configured,
1330                  * be on the safe side and just allow bcast for this mac.
1331                  */
1332                 if (WARN_ON_ONCE(data->current_filter >=
1333                                  ARRAY_SIZE(cmd->filters))) {
1334                         bcast_mac->default_discard = 0;
1335                         bcast_mac->attached_filters = 0;
1336                         break;
1337                 }
1338
1339                 iwl_mvm_set_bcast_filter(vif,
1340                                          &mvm->bcast_filters[i],
1341                                          &cmd->filters[data->current_filter]);
1342
1343                 /* skip current filter if it contains no attributes */
1344                 if (!cmd->filters[data->current_filter].num_attrs)
1345                         continue;
1346
1347                 /* attach the filter to current mac */
1348                 bcast_mac->attached_filters |=
1349                                 cpu_to_le16(BIT(data->current_filter));
1350
1351                 data->current_filter++;
1352         }
1353 }
1354
1355 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1356                                     struct iwl_bcast_filter_cmd *cmd)
1357 {
1358         struct iwl_bcast_iter_data iter_data = {
1359                 .mvm = mvm,
1360                 .cmd = cmd,
1361         };
1362
1363         memset(cmd, 0, sizeof(*cmd));
1364         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1365         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1366
1367 #ifdef CONFIG_IWLWIFI_DEBUGFS
1368         /* use debugfs filters/macs if override is configured */
1369         if (mvm->dbgfs_bcast_filtering.override) {
1370                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1371                        sizeof(cmd->filters));
1372                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1373                        sizeof(cmd->macs));
1374                 return true;
1375         }
1376 #endif
1377
1378         /* if no filters are configured, do nothing */
1379         if (!mvm->bcast_filters)
1380                 return false;
1381
1382         /* configure and attach these filters for each associated sta vif */
1383         ieee80211_iterate_active_interfaces(
1384                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1385                 iwl_mvm_bcast_filter_iterator, &iter_data);
1386
1387         return true;
1388 }
1389 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1390                                           struct ieee80211_vif *vif)
1391 {
1392         struct iwl_bcast_filter_cmd cmd;
1393
1394         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1395                 return 0;
1396
1397         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1398                 return 0;
1399
1400         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1401                                     sizeof(cmd), &cmd);
1402 }
1403 #else
1404 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1405                                                  struct ieee80211_vif *vif)
1406 {
1407         return 0;
1408 }
1409 #endif
1410
1411 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1412 {
1413         struct ieee80211_sta *sta;
1414         struct iwl_mvm_sta *mvmsta;
1415         int i;
1416
1417         lockdep_assert_held(&mvm->mutex);
1418
1419         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1420                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1421                                                 lockdep_is_held(&mvm->mutex));
1422                 if (!sta || IS_ERR(sta) || !sta->tdls)
1423                         continue;
1424
1425                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1426                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1427                                 NL80211_TDLS_TEARDOWN,
1428                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1429                                 GFP_KERNEL);
1430         }
1431 }
1432
1433 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1434                                              struct ieee80211_vif *vif,
1435                                              struct ieee80211_bss_conf *bss_conf,
1436                                              u32 changes)
1437 {
1438         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1439         int ret;
1440
1441         /*
1442          * Re-calculate the tsf id, as the master-slave relations depend on the
1443          * beacon interval, which was not known when the station interface was
1444          * added.
1445          */
1446         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1447                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1448
1449         /*
1450          * If we're not associated yet, take the (new) BSSID before associating
1451          * so the firmware knows. If we're already associated, then use the old
1452          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1453          * branch for disassociation below.
1454          */
1455         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1456                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1457
1458         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1459         if (ret)
1460                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1461
1462         /* after sending it once, adopt mac80211 data */
1463         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1464         mvmvif->associated = bss_conf->assoc;
1465
1466         if (changes & BSS_CHANGED_ASSOC) {
1467                 if (bss_conf->assoc) {
1468                         /* add quota for this interface */
1469                         ret = iwl_mvm_update_quotas(mvm, NULL);
1470                         if (ret) {
1471                                 IWL_ERR(mvm, "failed to update quotas\n");
1472                                 return;
1473                         }
1474
1475                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1476                                      &mvm->status)) {
1477                                 /*
1478                                  * If we're restarting then the firmware will
1479                                  * obviously have lost synchronisation with
1480                                  * the AP. It will attempt to synchronise by
1481                                  * itself, but we can make it more reliable by
1482                                  * scheduling a session protection time event.
1483                                  *
1484                                  * The firmware needs to receive a beacon to
1485                                  * catch up with synchronisation, use 110% of
1486                                  * the beacon interval.
1487                                  *
1488                                  * Set a large maximum delay to allow for more
1489                                  * than a single interface.
1490                                  */
1491                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1492                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1493                                                         5 * dur, false);
1494                         }
1495
1496                         iwl_mvm_sf_update(mvm, vif, false);
1497                         iwl_mvm_power_vif_assoc(mvm, vif);
1498                         if (vif->p2p) {
1499                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1500                                 iwl_mvm_update_smps(mvm, vif,
1501                                                     IWL_MVM_SMPS_REQ_PROT,
1502                                                     IEEE80211_SMPS_DYNAMIC);
1503                         }
1504                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1505                         /*
1506                          * If update fails - SF might be running in associated
1507                          * mode while disassociated - which is forbidden.
1508                          */
1509                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1510                                   "Failed to update SF upon disassociation\n");
1511
1512                         /* remove AP station now that the MAC is unassoc */
1513                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1514                         if (ret)
1515                                 IWL_ERR(mvm, "failed to remove AP station\n");
1516
1517                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1518                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1519                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1520                         /* remove quota for this interface */
1521                         ret = iwl_mvm_update_quotas(mvm, NULL);
1522                         if (ret)
1523                                 IWL_ERR(mvm, "failed to update quotas\n");
1524
1525                         if (vif->p2p)
1526                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1527
1528                         /* this will take the cleared BSSID from bss_conf */
1529                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1530                         if (ret)
1531                                 IWL_ERR(mvm,
1532                                         "failed to update MAC %pM (clear after unassoc)\n",
1533                                         vif->addr);
1534                 }
1535
1536                 iwl_mvm_recalc_multicast(mvm);
1537                 iwl_mvm_configure_bcast_filter(mvm, vif);
1538
1539                 /* reset rssi values */
1540                 mvmvif->bf_data.ave_beacon_signal = 0;
1541
1542                 iwl_mvm_bt_coex_vif_change(mvm);
1543                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1544                                     IEEE80211_SMPS_AUTOMATIC);
1545         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1546                 /*
1547                  * We received a beacon _after_ association so
1548                  * remove the session protection.
1549                  */
1550                 iwl_mvm_remove_time_event(mvm, mvmvif,
1551                                           &mvmvif->time_event_data);
1552         }
1553
1554         if (changes & BSS_CHANGED_BEACON_INFO) {
1555                 iwl_mvm_sf_update(mvm, vif, false);
1556                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1557         }
1558
1559         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1560                 ret = iwl_mvm_power_update_mac(mvm);
1561                 if (ret)
1562                         IWL_ERR(mvm, "failed to update power mode\n");
1563         }
1564
1565         if (changes & BSS_CHANGED_TXPOWER) {
1566                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1567                                 bss_conf->txpower);
1568                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1569         }
1570
1571         if (changes & BSS_CHANGED_CQM) {
1572                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1573                 /* reset cqm events tracking */
1574                 mvmvif->bf_data.last_cqm_event = 0;
1575                 if (mvmvif->bf_data.bf_enabled) {
1576                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1577                         if (ret)
1578                                 IWL_ERR(mvm,
1579                                         "failed to update CQM thresholds\n");
1580                 }
1581         }
1582
1583         if (changes & BSS_CHANGED_ARP_FILTER) {
1584                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1585                 iwl_mvm_configure_bcast_filter(mvm, vif);
1586         }
1587 }
1588
1589 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1590                                  struct ieee80211_vif *vif)
1591 {
1592         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1593         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1594         int ret;
1595
1596         /*
1597          * iwl_mvm_mac_ctxt_add() might read directly from the device
1598          * (the system time), so make sure it is available.
1599          */
1600         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1601         if (ret)
1602                 return ret;
1603
1604         mutex_lock(&mvm->mutex);
1605
1606         /* Send the beacon template */
1607         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1608         if (ret)
1609                 goto out_unlock;
1610
1611         /*
1612          * Re-calculate the tsf id, as the master-slave relations depend on the
1613          * beacon interval, which was not known when the AP interface was added.
1614          */
1615         if (vif->type == NL80211_IFTYPE_AP)
1616                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1617
1618         /* Add the mac context */
1619         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1620         if (ret)
1621                 goto out_unlock;
1622
1623         /* Perform the binding */
1624         ret = iwl_mvm_binding_add_vif(mvm, vif);
1625         if (ret)
1626                 goto out_remove;
1627
1628         /* Send the bcast station. At this stage the TBTT and DTIM time events
1629          * are added and applied to the scheduler */
1630         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1631         if (ret)
1632                 goto out_unbind;
1633
1634         /* must be set before quota calculations */
1635         mvmvif->ap_ibss_active = true;
1636
1637         /* power updated needs to be done before quotas */
1638         iwl_mvm_power_update_mac(mvm);
1639
1640         ret = iwl_mvm_update_quotas(mvm, NULL);
1641         if (ret)
1642                 goto out_quota_failed;
1643
1644         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1645         if (vif->p2p && mvm->p2p_device_vif)
1646                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1647
1648         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1649
1650         iwl_mvm_bt_coex_vif_change(mvm);
1651
1652         /* we don't support TDLS during DCM */
1653         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1654                 iwl_mvm_teardown_tdls_peers(mvm);
1655
1656         mutex_unlock(&mvm->mutex);
1657         return 0;
1658
1659 out_quota_failed:
1660         iwl_mvm_power_update_mac(mvm);
1661         mvmvif->ap_ibss_active = false;
1662         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1663 out_unbind:
1664         iwl_mvm_binding_remove_vif(mvm, vif);
1665 out_remove:
1666         iwl_mvm_mac_ctxt_remove(mvm, vif);
1667 out_unlock:
1668         mutex_unlock(&mvm->mutex);
1669         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1670         return ret;
1671 }
1672
1673 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1674                                  struct ieee80211_vif *vif)
1675 {
1676         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1677         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1678
1679         iwl_mvm_prepare_mac_removal(mvm, vif);
1680
1681         mutex_lock(&mvm->mutex);
1682
1683         /* Handle AP stop while in CSA */
1684         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1685                 iwl_mvm_remove_time_event(mvm, mvmvif,
1686                                           &mvmvif->time_event_data);
1687                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1688         }
1689
1690         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1691                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1692                 mvm->csa_tx_block_bcn_timeout = 0;
1693         }
1694
1695         mvmvif->ap_ibss_active = false;
1696         mvm->ap_last_beacon_gp2 = 0;
1697
1698         iwl_mvm_bt_coex_vif_change(mvm);
1699
1700         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1701
1702         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1703         if (vif->p2p && mvm->p2p_device_vif)
1704                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1705
1706         iwl_mvm_update_quotas(mvm, NULL);
1707         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1708         iwl_mvm_binding_remove_vif(mvm, vif);
1709
1710         iwl_mvm_power_update_mac(mvm);
1711
1712         iwl_mvm_mac_ctxt_remove(mvm, vif);
1713
1714         mutex_unlock(&mvm->mutex);
1715 }
1716
1717 static void
1718 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1719                                  struct ieee80211_vif *vif,
1720                                  struct ieee80211_bss_conf *bss_conf,
1721                                  u32 changes)
1722 {
1723         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1724
1725         /* Changes will be applied when the AP/IBSS is started */
1726         if (!mvmvif->ap_ibss_active)
1727                 return;
1728
1729         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1730                        BSS_CHANGED_BANDWIDTH) &&
1731             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1732                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1733
1734         /* Need to send a new beacon template to the FW */
1735         if (changes & BSS_CHANGED_BEACON &&
1736             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1737                 IWL_WARN(mvm, "Failed updating beacon data\n");
1738 }
1739
1740 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1741                                      struct ieee80211_vif *vif,
1742                                      struct ieee80211_bss_conf *bss_conf,
1743                                      u32 changes)
1744 {
1745         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1746
1747         /*
1748          * iwl_mvm_bss_info_changed_station() might call
1749          * iwl_mvm_protect_session(), which reads directly from
1750          * the device (the system time), so make sure it is available.
1751          */
1752         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1753                 return;
1754
1755         mutex_lock(&mvm->mutex);
1756
1757         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1758                 iwl_mvm_scan_offload_stop(mvm, true);
1759
1760         switch (vif->type) {
1761         case NL80211_IFTYPE_STATION:
1762                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1763                 break;
1764         case NL80211_IFTYPE_AP:
1765         case NL80211_IFTYPE_ADHOC:
1766                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1767                 break;
1768         default:
1769                 /* shouldn't happen */
1770                 WARN_ON_ONCE(1);
1771         }
1772
1773         mutex_unlock(&mvm->mutex);
1774         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1775 }
1776
1777 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1778                                           enum iwl_scan_status scan_type)
1779 {
1780         int ret;
1781         bool wait_for_handlers = false;
1782
1783         mutex_lock(&mvm->mutex);
1784
1785         if (mvm->scan_status != scan_type) {
1786                 ret = 0;
1787                 /* make sure there are no pending notifications */
1788                 wait_for_handlers = true;
1789                 goto out;
1790         }
1791
1792         switch (scan_type) {
1793         case IWL_MVM_SCAN_SCHED:
1794                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1795                 break;
1796         case IWL_MVM_SCAN_OS:
1797                 ret = iwl_mvm_cancel_scan(mvm);
1798                 break;
1799         case IWL_MVM_SCAN_NONE:
1800         default:
1801                 WARN_ON_ONCE(1);
1802                 ret = -EINVAL;
1803                 break;
1804         }
1805         if (ret)
1806                 goto out;
1807
1808         wait_for_handlers = true;
1809 out:
1810         mutex_unlock(&mvm->mutex);
1811
1812         /* make sure we consume the completion notification */
1813         if (wait_for_handlers)
1814                 iwl_mvm_wait_for_async_handlers(mvm);
1815
1816         return ret;
1817 }
1818 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1819                                struct ieee80211_vif *vif,
1820                                struct ieee80211_scan_request *hw_req)
1821 {
1822         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1823         struct cfg80211_scan_request *req = &hw_req->req;
1824         int ret;
1825
1826         if (req->n_channels == 0 ||
1827             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1828                 return -EINVAL;
1829
1830         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1831         if (ret)
1832                 return ret;
1833
1834         mutex_lock(&mvm->mutex);
1835
1836         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1837                 ret = -EBUSY;
1838                 goto out;
1839         }
1840
1841         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1842
1843         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1844                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1845         else
1846                 ret = iwl_mvm_scan_request(mvm, vif, req);
1847
1848         if (ret)
1849                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1850 out:
1851         mutex_unlock(&mvm->mutex);
1852         return ret;
1853 }
1854
1855 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1856                                        struct ieee80211_vif *vif)
1857 {
1858         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1859
1860         mutex_lock(&mvm->mutex);
1861
1862         iwl_mvm_cancel_scan(mvm);
1863
1864         mutex_unlock(&mvm->mutex);
1865 }
1866
1867 static void
1868 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1869                                   struct ieee80211_sta *sta, u16 tids,
1870                                   int num_frames,
1871                                   enum ieee80211_frame_release_type reason,
1872                                   bool more_data)
1873 {
1874         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1875
1876         /* Called when we need to transmit (a) frame(s) from mac80211 */
1877
1878         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1879                                           tids, more_data, false);
1880 }
1881
1882 static void
1883 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1884                                     struct ieee80211_sta *sta, u16 tids,
1885                                     int num_frames,
1886                                     enum ieee80211_frame_release_type reason,
1887                                     bool more_data)
1888 {
1889         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1890
1891         /* Called when we need to transmit (a) frame(s) from agg queue */
1892
1893         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1894                                           tids, more_data, true);
1895 }
1896
1897 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1898                                    struct ieee80211_vif *vif,
1899                                    enum sta_notify_cmd cmd,
1900                                    struct ieee80211_sta *sta)
1901 {
1902         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1903         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1904         int tid;
1905
1906         switch (cmd) {
1907         case STA_NOTIFY_SLEEP:
1908                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1909                         ieee80211_sta_block_awake(hw, sta, true);
1910                 spin_lock_bh(&mvmsta->lock);
1911                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1912                         struct iwl_mvm_tid_data *tid_data;
1913
1914                         tid_data = &mvmsta->tid_data[tid];
1915                         if (tid_data->state != IWL_AGG_ON &&
1916                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1917                                 continue;
1918                         if (iwl_mvm_tid_queued(tid_data) == 0)
1919                                 continue;
1920                         ieee80211_sta_set_buffered(sta, tid, true);
1921                 }
1922                 spin_unlock_bh(&mvmsta->lock);
1923                 /*
1924                  * The fw updates the STA to be asleep. Tx packets on the Tx
1925                  * queues to this station will not be transmitted. The fw will
1926                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1927                  */
1928                 break;
1929         case STA_NOTIFY_AWAKE:
1930                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1931                         break;
1932                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1933                 break;
1934         default:
1935                 break;
1936         }
1937 }
1938
1939 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1940                                        struct ieee80211_vif *vif,
1941                                        struct ieee80211_sta *sta)
1942 {
1943         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1944         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1945
1946         /*
1947          * This is called before mac80211 does RCU synchronisation,
1948          * so here we already invalidate our internal RCU-protected
1949          * station pointer. The rest of the code will thus no longer
1950          * be able to find the station this way, and we don't rely
1951          * on further RCU synchronisation after the sta_state()
1952          * callback deleted the station.
1953          */
1954         mutex_lock(&mvm->mutex);
1955         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1956                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1957                                    ERR_PTR(-ENOENT));
1958         mutex_unlock(&mvm->mutex);
1959 }
1960
1961 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1962 {
1963         struct ieee80211_sta *sta;
1964         struct iwl_mvm_sta *mvmsta;
1965         int count = 0;
1966         int i;
1967
1968         lockdep_assert_held(&mvm->mutex);
1969
1970         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1971                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1972                                                 lockdep_is_held(&mvm->mutex));
1973                 if (!sta || IS_ERR(sta) || !sta->tdls)
1974                         continue;
1975
1976                 if (vif) {
1977                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1978                         if (mvmsta->vif != vif)
1979                                 continue;
1980                 }
1981
1982                 count++;
1983         }
1984
1985         return count;
1986 }
1987
1988 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1989                                       struct ieee80211_vif *vif,
1990                                       bool sta_added)
1991 {
1992         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1993
1994         /*
1995          * Disable ps when the first TDLS sta is added and re-enable it
1996          * when the last TDLS sta is removed
1997          */
1998         if ((tdls_sta_cnt == 1 && sta_added) ||
1999             (tdls_sta_cnt == 0 && !sta_added))
2000                 iwl_mvm_power_update_mac(mvm);
2001 }
2002
2003 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2004                                  struct ieee80211_vif *vif,
2005                                  struct ieee80211_sta *sta,
2006                                  enum ieee80211_sta_state old_state,
2007                                  enum ieee80211_sta_state new_state)
2008 {
2009         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2010         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2011         int ret;
2012
2013         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2014                            sta->addr, old_state, new_state);
2015
2016         /* this would be a mac80211 bug ... but don't crash */
2017         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2018                 return -EINVAL;
2019
2020         /* if a STA is being removed, reuse its ID */
2021         flush_work(&mvm->sta_drained_wk);
2022
2023         mutex_lock(&mvm->mutex);
2024         if (old_state == IEEE80211_STA_NOTEXIST &&
2025             new_state == IEEE80211_STA_NONE) {
2026                 /*
2027                  * Firmware bug - it'll crash if the beacon interval is less
2028                  * than 16. We can't avoid connecting at all, so refuse the
2029                  * station state change, this will cause mac80211 to abandon
2030                  * attempts to connect to this AP, and eventually wpa_s will
2031                  * blacklist the AP...
2032                  */
2033                 if (vif->type == NL80211_IFTYPE_STATION &&
2034                     vif->bss_conf.beacon_int < 16) {
2035                         IWL_ERR(mvm,
2036                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2037                                 sta->addr, vif->bss_conf.beacon_int);
2038                         ret = -EINVAL;
2039                         goto out_unlock;
2040                 }
2041
2042                 if (sta->tdls &&
2043                     (vif->p2p ||
2044                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2045                                                 IWL_MVM_TDLS_STA_COUNT ||
2046                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2047                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2048                         ret = -EBUSY;
2049                         goto out_unlock;
2050                 }
2051
2052                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2053                 if (sta->tdls && ret == 0)
2054                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2055         } else if (old_state == IEEE80211_STA_NONE &&
2056                    new_state == IEEE80211_STA_AUTH) {
2057                 /*
2058                  * EBS may be disabled due to previous failures reported by FW.
2059                  * Reset EBS status here assuming environment has been changed.
2060                  */
2061                 mvm->last_ebs_successful = true;
2062                 ret = 0;
2063         } else if (old_state == IEEE80211_STA_AUTH &&
2064                    new_state == IEEE80211_STA_ASSOC) {
2065                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2066                 if (ret == 0)
2067                         iwl_mvm_rs_rate_init(mvm, sta,
2068                                              mvmvif->phy_ctxt->channel->band,
2069                                              true);
2070         } else if (old_state == IEEE80211_STA_ASSOC &&
2071                    new_state == IEEE80211_STA_AUTHORIZED) {
2072
2073                 /* we don't support TDLS during DCM */
2074                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2075                         iwl_mvm_teardown_tdls_peers(mvm);
2076
2077                 /* enable beacon filtering */
2078                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2079                 ret = 0;
2080         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2081                    new_state == IEEE80211_STA_ASSOC) {
2082                 /* disable beacon filtering */
2083                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2084                 ret = 0;
2085         } else if (old_state == IEEE80211_STA_ASSOC &&
2086                    new_state == IEEE80211_STA_AUTH) {
2087                 ret = 0;
2088         } else if (old_state == IEEE80211_STA_AUTH &&
2089                    new_state == IEEE80211_STA_NONE) {
2090                 ret = 0;
2091         } else if (old_state == IEEE80211_STA_NONE &&
2092                    new_state == IEEE80211_STA_NOTEXIST) {
2093                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2094                 if (sta->tdls)
2095                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2096         } else {
2097                 ret = -EIO;
2098         }
2099  out_unlock:
2100         mutex_unlock(&mvm->mutex);
2101
2102         return ret;
2103 }
2104
2105 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2106 {
2107         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2108
2109         mvm->rts_threshold = value;
2110
2111         return 0;
2112 }
2113
2114 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2115                                   struct ieee80211_vif *vif,
2116                                   struct ieee80211_sta *sta, u32 changed)
2117 {
2118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2119
2120         if (vif->type == NL80211_IFTYPE_STATION &&
2121             changed & IEEE80211_RC_NSS_CHANGED)
2122                 iwl_mvm_sf_update(mvm, vif, false);
2123 }
2124
2125 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2126                                struct ieee80211_vif *vif, u16 ac,
2127                                const struct ieee80211_tx_queue_params *params)
2128 {
2129         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2130         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2131
2132         mvmvif->queue_params[ac] = *params;
2133
2134         /*
2135          * No need to update right away, we'll get BSS_CHANGED_QOS
2136          * The exception is P2P_DEVICE interface which needs immediate update.
2137          */
2138         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2139                 int ret;
2140
2141                 mutex_lock(&mvm->mutex);
2142                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2143                 mutex_unlock(&mvm->mutex);
2144                 return ret;
2145         }
2146         return 0;
2147 }
2148
2149 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2150                                       struct ieee80211_vif *vif)
2151 {
2152         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2153         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2154                            200 + vif->bss_conf.beacon_int);
2155         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2156                                100 + vif->bss_conf.beacon_int);
2157
2158         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2159                 return;
2160
2161         /*
2162          * iwl_mvm_protect_session() reads directly from the device
2163          * (the system time), so make sure it is available.
2164          */
2165         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2166                 return;
2167
2168         mutex_lock(&mvm->mutex);
2169         /* Try really hard to protect the session and hear a beacon */
2170         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2171         mutex_unlock(&mvm->mutex);
2172
2173         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2174 }
2175
2176 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2177                                                   struct ieee80211_vif *vif)
2178 {
2179         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2180         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2181
2182         /*
2183          * iwl_mvm_protect_session() reads directly from the device
2184          * (the system time), so make sure it is available.
2185          */
2186         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2187                 return;
2188
2189         mutex_lock(&mvm->mutex);
2190         /* Protect the session to hear the TDLS setup response on the channel */
2191         iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
2192         mutex_unlock(&mvm->mutex);
2193
2194         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2195 }
2196
2197 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2198                                         struct ieee80211_vif *vif,
2199                                         struct cfg80211_sched_scan_request *req,
2200                                         struct ieee80211_scan_ies *ies)
2201 {
2202         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2203         int ret;
2204
2205         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2206         if (ret)
2207                 return ret;
2208
2209         mutex_lock(&mvm->mutex);
2210
2211         if (!iwl_mvm_is_idle(mvm)) {
2212                 ret = -EBUSY;
2213                 goto out;
2214         }
2215
2216         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2217                 ret = -EBUSY;
2218                 goto out;
2219         }
2220
2221         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2222
2223         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2224                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2225                 if (ret)
2226                         goto err;
2227         }
2228
2229         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2230         if (ret)
2231                 goto err;
2232
2233         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2234                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2235         else
2236                 ret = iwl_mvm_sched_scan_start(mvm, req);
2237
2238         if (!ret)
2239                 goto out;
2240 err:
2241         mvm->scan_status = IWL_MVM_SCAN_NONE;
2242 out:
2243         mutex_unlock(&mvm->mutex);
2244         return ret;
2245 }
2246
2247 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2248                                        struct ieee80211_vif *vif)
2249 {
2250         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2251         int ret;
2252
2253         mutex_lock(&mvm->mutex);
2254         ret = iwl_mvm_scan_offload_stop(mvm, false);
2255         mutex_unlock(&mvm->mutex);
2256         iwl_mvm_wait_for_async_handlers(mvm);
2257
2258         return ret;
2259 }
2260
2261 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2262                                enum set_key_cmd cmd,
2263                                struct ieee80211_vif *vif,
2264                                struct ieee80211_sta *sta,
2265                                struct ieee80211_key_conf *key)
2266 {
2267         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2268         int ret;
2269
2270         if (iwlwifi_mod_params.sw_crypto) {
2271                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2272                 return -EOPNOTSUPP;
2273         }
2274
2275         switch (key->cipher) {
2276         case WLAN_CIPHER_SUITE_TKIP:
2277                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2278                 /* fall-through */
2279         case WLAN_CIPHER_SUITE_CCMP:
2280                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2281                 break;
2282         case WLAN_CIPHER_SUITE_AES_CMAC:
2283                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2284                 break;
2285         case WLAN_CIPHER_SUITE_WEP40:
2286         case WLAN_CIPHER_SUITE_WEP104:
2287                 /*
2288                  * Support for TX only, at least for now, so accept
2289                  * the key and do nothing else. Then mac80211 will
2290                  * pass it for TX but we don't have to use it for RX.
2291                  */
2292                 return 0;
2293         default:
2294                 /* currently FW supports only one optional cipher scheme */
2295                 if (hw->n_cipher_schemes &&
2296                     hw->cipher_schemes->cipher == key->cipher)
2297                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2298                 else
2299                         return -EOPNOTSUPP;
2300         }
2301
2302         mutex_lock(&mvm->mutex);
2303
2304         switch (cmd) {
2305         case SET_KEY:
2306                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2307                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2308                         /*
2309                          * GTK on AP interface is a TX-only key, return 0;
2310                          * on IBSS they're per-station and because we're lazy
2311                          * we don't support them for RX, so do the same.
2312                          */
2313                         ret = 0;
2314                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2315                         break;
2316                 }
2317
2318                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2319                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2320                 if (ret) {
2321                         IWL_WARN(mvm, "set key failed\n");
2322                         /*
2323                          * can't add key for RX, but we don't need it
2324                          * in the device for TX so still return 0
2325                          */
2326                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2327                         ret = 0;
2328                 }
2329
2330                 break;
2331         case DISABLE_KEY:
2332                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2333                         ret = 0;
2334                         break;
2335                 }
2336
2337                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2338                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2339                 break;
2340         default:
2341                 ret = -EINVAL;
2342         }
2343
2344         mutex_unlock(&mvm->mutex);
2345         return ret;
2346 }
2347
2348 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2349                                         struct ieee80211_vif *vif,
2350                                         struct ieee80211_key_conf *keyconf,
2351                                         struct ieee80211_sta *sta,
2352                                         u32 iv32, u16 *phase1key)
2353 {
2354         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2355
2356         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2357                 return;
2358
2359         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2360 }
2361
2362
2363 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2364                                struct iwl_rx_packet *pkt, void *data)
2365 {
2366         struct iwl_mvm *mvm =
2367                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2368         struct iwl_hs20_roc_res *resp;
2369         int resp_len = iwl_rx_packet_payload_len(pkt);
2370         struct iwl_mvm_time_event_data *te_data = data;
2371
2372         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2373                 return true;
2374
2375         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2376                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2377                 return true;
2378         }
2379
2380         resp = (void *)pkt->data;
2381
2382         IWL_DEBUG_TE(mvm,
2383                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2384                      resp->status, resp->event_unique_id);
2385
2386         te_data->uid = le32_to_cpu(resp->event_unique_id);
2387         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2388                      te_data->uid);
2389
2390         spin_lock_bh(&mvm->time_event_lock);
2391         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2392         spin_unlock_bh(&mvm->time_event_lock);
2393
2394         return true;
2395 }
2396
2397 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2398 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2399                                     struct ieee80211_channel *channel,
2400                                     struct ieee80211_vif *vif,
2401                                     int duration)
2402 {
2403         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2404         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2405         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2406         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2407         struct iwl_notification_wait wait_time_event;
2408         struct iwl_hs20_roc_req aux_roc_req = {
2409                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2410                 .id_and_color =
2411                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2412                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2413                 /* Set the channel info data */
2414                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2415                         PHY_BAND_24 : PHY_BAND_5,
2416                 .channel_info.channel = channel->hw_value,
2417                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2418                 /* Set the time and duration */
2419                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2420                 .apply_time_max_delay =
2421                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2422                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2423          };
2424
2425         /* Set the node address */
2426         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2427
2428         te_data->vif = vif;
2429         te_data->duration = duration;
2430         te_data->id = HOT_SPOT_CMD;
2431
2432         lockdep_assert_held(&mvm->mutex);
2433
2434         spin_lock_bh(&mvm->time_event_lock);
2435         list_add_tail(&te_data->list, &mvm->time_event_list);
2436         spin_unlock_bh(&mvm->time_event_lock);
2437
2438         /*
2439          * Use a notification wait, which really just processes the
2440          * command response and doesn't wait for anything, in order
2441          * to be able to process the response and get the UID inside
2442          * the RX path. Using CMD_WANT_SKB doesn't work because it
2443          * stores the buffer and then wakes up this thread, by which
2444          * time another notification (that the time event started)
2445          * might already be processed unsuccessfully.
2446          */
2447         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2448                                    time_event_response,
2449                                    ARRAY_SIZE(time_event_response),
2450                                    iwl_mvm_rx_aux_roc, te_data);
2451
2452         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2453                                    &aux_roc_req);
2454
2455         if (res) {
2456                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2457                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2458                 goto out_clear_te;
2459         }
2460
2461         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2462         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2463         /* should never fail */
2464         WARN_ON_ONCE(res);
2465
2466         if (res) {
2467  out_clear_te:
2468                 spin_lock_bh(&mvm->time_event_lock);
2469                 iwl_mvm_te_clear_data(mvm, te_data);
2470                 spin_unlock_bh(&mvm->time_event_lock);
2471         }
2472
2473         return res;
2474 }
2475
2476 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2477                        struct ieee80211_vif *vif,
2478                        struct ieee80211_channel *channel,
2479                        int duration,
2480                        enum ieee80211_roc_type type)
2481 {
2482         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2483         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2484         struct cfg80211_chan_def chandef;
2485         struct iwl_mvm_phy_ctxt *phy_ctxt;
2486         int ret, i;
2487
2488         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2489                            duration, type);
2490
2491         switch (vif->type) {
2492         case NL80211_IFTYPE_STATION:
2493                 /* Use aux roc framework (HS20) */
2494                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2495                                                vif, duration);
2496                 return ret;
2497         case NL80211_IFTYPE_P2P_DEVICE:
2498                 /* handle below */
2499                 break;
2500         default:
2501                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2502                 return -EINVAL;
2503         }
2504
2505         mutex_lock(&mvm->mutex);
2506
2507         for (i = 0; i < NUM_PHY_CTX; i++) {
2508                 phy_ctxt = &mvm->phy_ctxts[i];
2509                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2510                         continue;
2511
2512                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2513                         /*
2514                          * Unbind the P2P_DEVICE from the current PHY context,
2515                          * and if the PHY context is not used remove it.
2516                          */
2517                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2518                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2519                                 goto out_unlock;
2520
2521                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2522
2523                         /* Bind the P2P_DEVICE to the current PHY Context */
2524                         mvmvif->phy_ctxt = phy_ctxt;
2525
2526                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2527                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2528                                 goto out_unlock;
2529
2530                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2531                         goto schedule_time_event;
2532                 }
2533         }
2534
2535         /* Need to update the PHY context only if the ROC channel changed */
2536         if (channel == mvmvif->phy_ctxt->channel)
2537                 goto schedule_time_event;
2538
2539         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2540
2541         /*
2542          * Change the PHY context configuration as it is currently referenced
2543          * only by the P2P Device MAC
2544          */
2545         if (mvmvif->phy_ctxt->ref == 1) {
2546                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2547                                                &chandef, 1, 1);
2548                 if (ret)
2549                         goto out_unlock;
2550         } else {
2551                 /*
2552                  * The PHY context is shared with other MACs. Need to remove the
2553                  * P2P Device from the binding, allocate an new PHY context and
2554                  * create a new binding
2555                  */
2556                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2557                 if (!phy_ctxt) {
2558                         ret = -ENOSPC;
2559                         goto out_unlock;
2560                 }
2561
2562                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2563                                                1, 1);
2564                 if (ret) {
2565                         IWL_ERR(mvm, "Failed to change PHY context\n");
2566                         goto out_unlock;
2567                 }
2568
2569                 /* Unbind the P2P_DEVICE from the current PHY context */
2570                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2571                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2572                         goto out_unlock;
2573
2574                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2575
2576                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2577                 mvmvif->phy_ctxt = phy_ctxt;
2578
2579                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2580                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2581                         goto out_unlock;
2582
2583                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2584         }
2585
2586 schedule_time_event:
2587         /* Schedule the time events */
2588         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2589
2590 out_unlock:
2591         mutex_unlock(&mvm->mutex);
2592         IWL_DEBUG_MAC80211(mvm, "leave\n");
2593         return ret;
2594 }
2595
2596 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2597 {
2598         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2599
2600         IWL_DEBUG_MAC80211(mvm, "enter\n");
2601
2602         mutex_lock(&mvm->mutex);
2603         iwl_mvm_stop_p2p_roc(mvm);
2604         mutex_unlock(&mvm->mutex);
2605
2606         IWL_DEBUG_MAC80211(mvm, "leave\n");
2607         return 0;
2608 }
2609
2610 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2611                                  struct ieee80211_chanctx_conf *ctx)
2612 {
2613         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2614         struct iwl_mvm_phy_ctxt *phy_ctxt;
2615         int ret;
2616
2617         lockdep_assert_held(&mvm->mutex);
2618
2619         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2620
2621         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2622         if (!phy_ctxt) {
2623                 ret = -ENOSPC;
2624                 goto out;
2625         }
2626
2627         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2628                                        ctx->rx_chains_static,
2629                                        ctx->rx_chains_dynamic);
2630         if (ret) {
2631                 IWL_ERR(mvm, "Failed to add PHY context\n");
2632                 goto out;
2633         }
2634
2635         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2636         *phy_ctxt_id = phy_ctxt->id;
2637 out:
2638         return ret;
2639 }
2640
2641 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2642                                struct ieee80211_chanctx_conf *ctx)
2643 {
2644         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2645         int ret;
2646
2647         mutex_lock(&mvm->mutex);
2648         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2649         mutex_unlock(&mvm->mutex);
2650
2651         return ret;
2652 }
2653
2654 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2655                                      struct ieee80211_chanctx_conf *ctx)
2656 {
2657         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2658         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2659
2660         lockdep_assert_held(&mvm->mutex);
2661
2662         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2663 }
2664
2665 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2666                                    struct ieee80211_chanctx_conf *ctx)
2667 {
2668         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2669
2670         mutex_lock(&mvm->mutex);
2671         __iwl_mvm_remove_chanctx(mvm, ctx);
2672         mutex_unlock(&mvm->mutex);
2673 }
2674
2675 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2676                                    struct ieee80211_chanctx_conf *ctx,
2677                                    u32 changed)
2678 {
2679         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2680         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2681         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2682
2683         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2684                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2685                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2686                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2687                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2688                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2689                       phy_ctxt->ref, changed))
2690                 return;
2691
2692         mutex_lock(&mvm->mutex);
2693         iwl_mvm_bt_coex_vif_change(mvm);
2694         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2695                                  ctx->rx_chains_static,
2696                                  ctx->rx_chains_dynamic);
2697         mutex_unlock(&mvm->mutex);
2698 }
2699
2700 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2701                                         struct ieee80211_vif *vif,
2702                                         struct ieee80211_chanctx_conf *ctx,
2703                                         bool switching_chanctx)
2704 {
2705         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2706         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2707         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2708         int ret;
2709
2710         lockdep_assert_held(&mvm->mutex);
2711
2712         mvmvif->phy_ctxt = phy_ctxt;
2713
2714         switch (vif->type) {
2715         case NL80211_IFTYPE_AP:
2716                 /* Unless it's a CSA flow we have nothing to do here */
2717                 if (vif->csa_active) {
2718                         mvmvif->ap_ibss_active = true;
2719                         break;
2720                 }
2721         case NL80211_IFTYPE_ADHOC:
2722                 /*
2723                  * The AP binding flow is handled as part of the start_ap flow
2724                  * (in bss_info_changed), similarly for IBSS.
2725                  */
2726                 ret = 0;
2727                 goto out;
2728         case NL80211_IFTYPE_STATION:
2729                 break;
2730         case NL80211_IFTYPE_MONITOR:
2731                 /* always disable PS when a monitor interface is active */
2732                 mvmvif->ps_disabled = true;
2733                 break;
2734         default:
2735                 ret = -EINVAL;
2736                 goto out;
2737         }
2738
2739         ret = iwl_mvm_binding_add_vif(mvm, vif);
2740         if (ret)
2741                 goto out;
2742
2743         /*
2744          * Power state must be updated before quotas,
2745          * otherwise fw will complain.
2746          */
2747         iwl_mvm_power_update_mac(mvm);
2748
2749         /* Setting the quota at this stage is only required for monitor
2750          * interfaces. For the other types, the bss_info changed flow
2751          * will handle quota settings.
2752          */
2753         if (vif->type == NL80211_IFTYPE_MONITOR) {
2754                 mvmvif->monitor_active = true;
2755                 ret = iwl_mvm_update_quotas(mvm, NULL);
2756                 if (ret)
2757                         goto out_remove_binding;
2758         }
2759
2760         /* Handle binding during CSA */
2761         if ((vif->type == NL80211_IFTYPE_AP) ||
2762             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2763                 iwl_mvm_update_quotas(mvm, NULL);
2764                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2765         }
2766
2767         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2768                 struct iwl_mvm_sta *mvmsta;
2769
2770                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2771                                                           mvmvif->ap_sta_id);
2772
2773                 if (WARN_ON(!mvmsta))
2774                         goto out;
2775
2776                 /* TODO: only re-enable after the first beacon */
2777                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2778         }
2779
2780         goto out;
2781
2782 out_remove_binding:
2783         iwl_mvm_binding_remove_vif(mvm, vif);
2784         iwl_mvm_power_update_mac(mvm);
2785 out:
2786         if (ret)
2787                 mvmvif->phy_ctxt = NULL;
2788         return ret;
2789 }
2790 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2791                                       struct ieee80211_vif *vif,
2792                                       struct ieee80211_chanctx_conf *ctx)
2793 {
2794         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2795         int ret;
2796
2797         mutex_lock(&mvm->mutex);
2798         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2799         mutex_unlock(&mvm->mutex);
2800
2801         return ret;
2802 }
2803
2804 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2805                                            struct ieee80211_vif *vif,
2806                                            struct ieee80211_chanctx_conf *ctx,
2807                                            bool switching_chanctx)
2808 {
2809         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2810         struct ieee80211_vif *disabled_vif = NULL;
2811         struct iwl_mvm_sta *mvmsta;
2812
2813         lockdep_assert_held(&mvm->mutex);
2814
2815         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2816
2817         switch (vif->type) {
2818         case NL80211_IFTYPE_ADHOC:
2819                 goto out;
2820         case NL80211_IFTYPE_MONITOR:
2821                 mvmvif->monitor_active = false;
2822                 mvmvif->ps_disabled = false;
2823                 break;
2824         case NL80211_IFTYPE_AP:
2825                 /* This part is triggered only during CSA */
2826                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2827                         goto out;
2828
2829                 /* Set CS bit on all the stations */
2830                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2831
2832                 /* Save blocked iface, the timeout is set on the next beacon */
2833                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2834
2835                 mvmvif->ap_ibss_active = false;
2836                 break;
2837         case NL80211_IFTYPE_STATION:
2838                 if (!switching_chanctx)
2839                         break;
2840
2841                 disabled_vif = vif;
2842
2843                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2844                                                           mvmvif->ap_sta_id);
2845
2846                 if (!WARN_ON(!mvmsta))
2847                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2848
2849                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2850                 break;
2851         default:
2852                 break;
2853         }
2854
2855         iwl_mvm_update_quotas(mvm, disabled_vif);
2856         iwl_mvm_binding_remove_vif(mvm, vif);
2857
2858 out:
2859         mvmvif->phy_ctxt = NULL;
2860         iwl_mvm_power_update_mac(mvm);
2861 }
2862
2863 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2864                                          struct ieee80211_vif *vif,
2865                                          struct ieee80211_chanctx_conf *ctx)
2866 {
2867         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2868
2869         mutex_lock(&mvm->mutex);
2870         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2871         mutex_unlock(&mvm->mutex);
2872 }
2873
2874 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2875                                       struct ieee80211_vif_chanctx_switch *vifs,
2876                                       int n_vifs,
2877                                       enum ieee80211_chanctx_switch_mode mode)
2878 {
2879         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2880         int ret;
2881
2882         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2883         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2884                 return -EOPNOTSUPP;
2885
2886         mutex_lock(&mvm->mutex);
2887         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2888         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2889
2890         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2891         if (ret) {
2892                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2893                 goto out_reassign;
2894         }
2895
2896         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2897                                            true);
2898         if (ret) {
2899                 IWL_ERR(mvm,
2900                         "failed to assign new_ctx during channel switch\n");
2901                 goto out_remove;
2902         }
2903
2904         /* we don't support TDLS during DCM - can be caused by channel switch */
2905         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2906                 iwl_mvm_teardown_tdls_peers(mvm);
2907
2908         goto out;
2909
2910 out_remove:
2911         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2912
2913 out_reassign:
2914         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2915         if (ret) {
2916                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2917                 goto out_restart;
2918         }
2919
2920         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2921                                            true);
2922         if (ret) {
2923                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2924                 goto out_restart;
2925         }
2926
2927         goto out;
2928
2929 out_restart:
2930         /* things keep failing, better restart the hw */
2931         iwl_mvm_nic_restart(mvm, false);
2932
2933 out:
2934         mutex_unlock(&mvm->mutex);
2935         return ret;
2936 }
2937
2938 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2939                            struct ieee80211_sta *sta,
2940                            bool set)
2941 {
2942         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2943         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2944
2945         if (!mvm_sta || !mvm_sta->vif) {
2946                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2947                 return -EINVAL;
2948         }
2949
2950         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2951 }
2952
2953 #ifdef CONFIG_NL80211_TESTMODE
2954 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2955         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2956         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2957         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2958 };
2959
2960 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2961                                       struct ieee80211_vif *vif,
2962                                       void *data, int len)
2963 {
2964         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2965         int err;
2966         u32 noa_duration;
2967
2968         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2969         if (err)
2970                 return err;
2971
2972         if (!tb[IWL_MVM_TM_ATTR_CMD])
2973                 return -EINVAL;
2974
2975         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2976         case IWL_MVM_TM_CMD_SET_NOA:
2977                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2978                     !vif->bss_conf.enable_beacon ||
2979                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2980                         return -EINVAL;
2981
2982                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2983                 if (noa_duration >= vif->bss_conf.beacon_int)
2984                         return -EINVAL;
2985
2986                 mvm->noa_duration = noa_duration;
2987                 mvm->noa_vif = vif;
2988
2989                 return iwl_mvm_update_quotas(mvm, NULL);
2990         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2991                 /* must be associated client vif - ignore authorized */
2992                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2993                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2994                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2995                         return -EINVAL;
2996
2997                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2998                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2999                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3000         }
3001
3002         return -EOPNOTSUPP;
3003 }
3004
3005 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3006                                     struct ieee80211_vif *vif,
3007                                     void *data, int len)
3008 {
3009         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3010         int err;
3011
3012         mutex_lock(&mvm->mutex);
3013         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3014         mutex_unlock(&mvm->mutex);
3015
3016         return err;
3017 }
3018 #endif
3019
3020 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3021                                           struct ieee80211_vif *vif,
3022                                           struct cfg80211_chan_def *chandef)
3023 {
3024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3025         struct ieee80211_vif *csa_vif;
3026
3027         mutex_lock(&mvm->mutex);
3028
3029         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3030                                             lockdep_is_held(&mvm->mutex));
3031         if (WARN(csa_vif && csa_vif->csa_active,
3032                  "Another CSA is already in progress"))
3033                 goto out_unlock;
3034
3035         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3036                            chandef->center_freq1);
3037         rcu_assign_pointer(mvm->csa_vif, vif);
3038
3039 out_unlock:
3040         mutex_unlock(&mvm->mutex);
3041 }
3042
3043 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3044                               struct ieee80211_vif *vif, u32 queues, bool drop)
3045 {
3046         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3047         struct iwl_mvm_vif *mvmvif;
3048         struct iwl_mvm_sta *mvmsta;
3049
3050         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3051                 return;
3052
3053         mutex_lock(&mvm->mutex);
3054         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3055         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3056
3057         if (WARN_ON_ONCE(!mvmsta))
3058                 goto done;
3059
3060         if (drop) {
3061                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3062                         IWL_ERR(mvm, "flush request fail\n");
3063         } else {
3064                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3065                                               mvmsta->tfd_queue_msk);
3066         }
3067 done:
3068         mutex_unlock(&mvm->mutex);
3069 }
3070
3071 const struct ieee80211_ops iwl_mvm_hw_ops = {
3072         .tx = iwl_mvm_mac_tx,
3073         .ampdu_action = iwl_mvm_mac_ampdu_action,
3074         .start = iwl_mvm_mac_start,
3075         .restart_complete = iwl_mvm_mac_restart_complete,
3076         .stop = iwl_mvm_mac_stop,
3077         .add_interface = iwl_mvm_mac_add_interface,
3078         .remove_interface = iwl_mvm_mac_remove_interface,
3079         .config = iwl_mvm_mac_config,
3080         .prepare_multicast = iwl_mvm_prepare_multicast,
3081         .configure_filter = iwl_mvm_configure_filter,
3082         .bss_info_changed = iwl_mvm_bss_info_changed,
3083         .hw_scan = iwl_mvm_mac_hw_scan,
3084         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3085         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3086         .sta_state = iwl_mvm_mac_sta_state,
3087         .sta_notify = iwl_mvm_mac_sta_notify,
3088         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3089         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3090         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3091         .sta_rc_update = iwl_mvm_sta_rc_update,
3092         .conf_tx = iwl_mvm_mac_conf_tx,
3093         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3094         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3095         .flush = iwl_mvm_mac_flush,
3096         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3097         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3098         .set_key = iwl_mvm_mac_set_key,
3099         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3100         .remain_on_channel = iwl_mvm_roc,
3101         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3102         .add_chanctx = iwl_mvm_add_chanctx,
3103         .remove_chanctx = iwl_mvm_remove_chanctx,
3104         .change_chanctx = iwl_mvm_change_chanctx,
3105         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3106         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3107         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3108
3109         .start_ap = iwl_mvm_start_ap_ibss,
3110         .stop_ap = iwl_mvm_stop_ap_ibss,
3111         .join_ibss = iwl_mvm_start_ap_ibss,
3112         .leave_ibss = iwl_mvm_stop_ap_ibss,
3113
3114         .set_tim = iwl_mvm_set_tim,
3115
3116         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3117
3118         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3119
3120 #ifdef CONFIG_PM_SLEEP
3121         /* look at d3.c */
3122         .suspend = iwl_mvm_suspend,
3123         .resume = iwl_mvm_resume,
3124         .set_wakeup = iwl_mvm_set_wakeup,
3125         .set_rekey_data = iwl_mvm_set_rekey_data,
3126 #if IS_ENABLED(CONFIG_IPV6)
3127         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3128 #endif
3129         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3130 #endif
3131 };