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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  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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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>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  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         /* TODO: enable that only for firmwares that don't crash */
 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 = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 407
 408         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 409                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 410                                NL80211_FEATURE_P2P_GO_OPPPS;
 411
 412         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 413
 414         /* currently FW API supports only one optional cipher scheme */
 415         if (mvm->fw->cs[0].cipher) {
 416                 mvm->hw->n_cipher_schemes = 1;
 417                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 418         }
 419
 420 #ifdef CONFIG_PM_SLEEP
 421         if (iwl_mvm_is_d0i3_supported(mvm) &&
 422             device_can_wakeup(mvm->trans->dev)) {
 423                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 424                 hw->wiphy->wowlan = &mvm->wowlan;
 425         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 426             mvm->trans->ops->d3_suspend &&
 427             mvm->trans->ops->d3_resume &&
 428             device_can_wakeup(mvm->trans->dev)) {
 429                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 430                                     WIPHY_WOWLAN_DISCONNECT |
 431                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 432                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 433                 if (!iwlwifi_mod_params.sw_crypto)
 434                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 435                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 436                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 437
 438                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 439                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 440                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 441                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 442                 hw->wiphy->wowlan = &mvm->wowlan;
 443         }
 444 #endif
 445
 446 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 447         /* assign default bcast filtering configuration */
 448         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 449 #endif
 450
 451         ret = iwl_mvm_leds_init(mvm);
 452         if (ret)
 453                 return ret;
 454
 455         ret = ieee80211_register_hw(mvm->hw);
 456         if (ret)
 457                 iwl_mvm_leds_exit(mvm);
 458
 459         return ret;
 460 }
 461
 462 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 463                              struct ieee80211_sta *sta,
 464                              struct sk_buff *skb)
 465 {
 466         struct iwl_mvm_sta *mvmsta;
 467         bool defer = false;
 468
 469         /*
 470          * double check the IN_D0I3 flag both before and after
 471          * taking the spinlock, in order to prevent taking
 472          * the spinlock when not needed.
 473          */
 474         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 475                 return false;
 476
 477         spin_lock(&mvm->d0i3_tx_lock);
 478         /*
 479          * testing the flag again ensures the skb dequeue
 480          * loop (on d0i3 exit) hasn't run yet.
 481          */
 482         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 483                 goto out;
 484
 485         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 486         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 487             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 488                 goto out;
 489
 490         __skb_queue_tail(&mvm->d0i3_tx, skb);
 491         ieee80211_stop_queues(mvm->hw);
 492
 493         /* trigger wakeup */
 494         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 495         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 496
 497         defer = true;
 498 out:
 499         spin_unlock(&mvm->d0i3_tx_lock);
 500         return defer;
 501 }
 502
 503 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 504                            struct ieee80211_tx_control *control,
 505                            struct sk_buff *skb)
 506 {
 507         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 508         struct ieee80211_sta *sta = control->sta;
 509         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 510         struct ieee80211_hdr *hdr = (void *)skb->data;
 511
 512         if (iwl_mvm_is_radio_killed(mvm)) {
 513                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 514                 goto drop;
 515         }
 516
 517         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 518             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 519                 goto drop;
 520
 521         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 522         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 523                      ieee80211_is_mgmt(hdr->frame_control) &&
 524                      !ieee80211_is_deauth(hdr->frame_control) &&
 525                      !ieee80211_is_disassoc(hdr->frame_control) &&
 526                      !ieee80211_is_action(hdr->frame_control)))
 527                 sta = NULL;
 528
 529         if (sta) {
 530                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 531                         return;
 532                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 533                         goto drop;
 534                 return;
 535         }
 536
 537         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 538                 goto drop;
 539         return;
 540  drop:
 541         ieee80211_free_txskb(hw, skb);
 542 }
 543
 544 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 545 {
 546         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 547                 return false;
 548         return true;
 549 }
 550
 551 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 552 {
 553         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 554                 return false;
 555         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 556                 return true;
 557
 558         /* enabled by default */
 559         return true;
 560 }
 561
 562 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 563                                     struct ieee80211_vif *vif,
 564                                     enum ieee80211_ampdu_mlme_action action,
 565                                     struct ieee80211_sta *sta, u16 tid,
 566                                     u16 *ssn, u8 buf_size)
 567 {
 568         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 569         int ret;
 570         bool tx_agg_ref = false;
 571
 572         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 573                      sta->addr, tid, action);
 574
 575         if (!(mvm->nvm_data->sku_cap_11n_enable))
 576                 return -EACCES;
 577
 578         /* return from D0i3 before starting a new Tx aggregation */
 579         switch (action) {
 580         case IEEE80211_AMPDU_TX_START:
 581         case IEEE80211_AMPDU_TX_STOP_CONT:
 582         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 583         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 584         case IEEE80211_AMPDU_TX_OPERATIONAL:
 585                 /*
 586                  * for tx start, wait synchronously until D0i3 exit to
 587                  * get the correct sequence number for the tid.
 588                  * additionally, some other ampdu actions use direct
 589                  * target access, which is not handled automatically
 590                  * by the trans layer (unlike commands), so wait for
 591                  * d0i3 exit in these cases as well.
 592                  */
 593                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 594                 if (ret)
 595                         return ret;
 596
 597                 tx_agg_ref = true;
 598                 break;
 599         default:
 600                 break;
 601         }
 602
 603         mutex_lock(&mvm->mutex);
 604
 605         switch (action) {
 606         case IEEE80211_AMPDU_RX_START:
 607                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 608                         ret = -EINVAL;
 609                         break;
 610                 }
 611                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 612                 break;
 613         case IEEE80211_AMPDU_RX_STOP:
 614                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 615                 break;
 616         case IEEE80211_AMPDU_TX_START:
 617                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 618                         ret = -EINVAL;
 619                         break;
 620                 }
 621                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 622                 break;
 623         case IEEE80211_AMPDU_TX_STOP_CONT:
 624                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 625                 break;
 626         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 627         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 628                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 629                 break;
 630         case IEEE80211_AMPDU_TX_OPERATIONAL:
 631                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 632                 break;
 633         default:
 634                 WARN_ON_ONCE(1);
 635                 ret = -EINVAL;
 636                 break;
 637         }
 638         mutex_unlock(&mvm->mutex);
 639
 640         /*
 641          * If the tid is marked as started, we won't use it for offloaded
 642          * traffic on the next D0i3 entry. It's safe to unref.
 643          */
 644         if (tx_agg_ref)
 645                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 646
 647         return ret;
 648 }
 649
 650 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 651                                      struct ieee80211_vif *vif)
 652 {
 653         struct iwl_mvm *mvm = data;
 654         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 655
 656         mvmvif->uploaded = false;
 657         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 658
 659         /* does this make sense at all? */
 660         mvmvif->color++;
 661
 662         spin_lock_bh(&mvm->time_event_lock);
 663         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 664         spin_unlock_bh(&mvm->time_event_lock);
 665
 666         mvmvif->phy_ctxt = NULL;
 667         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 668 }
 669
 670 #ifdef CONFIG_IWLWIFI_DEBUGFS
 671 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 672 {
 673         struct iwl_fw_error_dump_file *dump_file;
 674         struct iwl_fw_error_dump_data *dump_data;
 675         struct iwl_fw_error_dump_info *dump_info;
 676         struct iwl_mvm_dump_ptrs *fw_error_dump;
 677         const struct fw_img *img;
 678         u32 sram_len, sram_ofs;
 679         u32 file_len, rxf_len;
 680         unsigned long flags;
 681         int reg_val;
 682
 683         lockdep_assert_held(&mvm->mutex);
 684
 685         if (mvm->fw_error_dump)
 686                 return;
 687
 688         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 689         if (!fw_error_dump)
 690                 return;
 691
 692         img = &mvm->fw->img[mvm->cur_ucode];
 693         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 694         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 695
 696         /* reading buffer size */
 697         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 698         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 699
 700         /* the register holds the value divided by 128 */
 701         rxf_len = rxf_len << 7;
 702
 703         file_len = sizeof(*dump_file) +
 704                    sizeof(*dump_data) * 3 +
 705                    sram_len +
 706                    rxf_len +
 707                    sizeof(*dump_info);
 708
 709         dump_file = vzalloc(file_len);
 710         if (!dump_file) {
 711                 kfree(fw_error_dump);
 712                 return;
 713         }
 714
 715         fw_error_dump->op_mode_ptr = dump_file;
 716
 717         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 718         dump_data = (void *)dump_file->data;
 719
 720         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 721         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 722         dump_info = (void *) dump_data->data;
 723         dump_info->device_family =
 724                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 725                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 726                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 727         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 728                sizeof(dump_info->fw_human_readable));
 729         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 730                 sizeof(dump_info->dev_human_readable));
 731         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 732                 sizeof(dump_info->bus_human_readable));
 733
 734         dump_data = iwl_fw_error_next_data(dump_data);
 735         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 736         dump_data->len = cpu_to_le32(rxf_len);
 737
 738         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 739                 u32 *rxf = (void *)dump_data->data;
 740                 int i;
 741
 742                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 743                         iwl_trans_write_prph(mvm->trans,
 744                                              RXF_LD_FENCE_OFFSET_ADDR,
 745                                              i * sizeof(u32));
 746                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 747                                                      RXF_FIFO_RD_FENCE_ADDR);
 748                 }
 749                 iwl_trans_release_nic_access(mvm->trans, &flags);
 750         }
 751
 752         dump_data = iwl_fw_error_next_data(dump_data);
 753         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 754         dump_data->len = cpu_to_le32(sram_len);
 755         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 756                                  sram_len);
 757
 758         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 759         fw_error_dump->op_mode_len = file_len;
 760         if (fw_error_dump->trans_ptr)
 761                 file_len += fw_error_dump->trans_ptr->len;
 762         dump_file->file_len = cpu_to_le32(file_len);
 763         mvm->fw_error_dump = fw_error_dump;
 764 }
 765 #endif
 766
 767 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 768 {
 769 #ifdef CONFIG_IWLWIFI_DEBUGFS
 770         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 771
 772         iwl_mvm_fw_error_dump(mvm);
 773
 774         /* notify the userspace about the error we had */
 775         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 776 #endif
 777
 778         iwl_trans_stop_device(mvm->trans);
 779
 780         mvm->scan_status = IWL_MVM_SCAN_NONE;
 781         mvm->ps_disabled = false;
 782
 783         /* just in case one was running */
 784         ieee80211_remain_on_channel_expired(mvm->hw);
 785
 786         ieee80211_iterate_active_interfaces_atomic(
 787                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 788                 iwl_mvm_cleanup_iterator, mvm);
 789
 790         mvm->p2p_device_vif = NULL;
 791         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 792
 793         iwl_mvm_reset_phy_ctxts(mvm);
 794         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 795         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 796         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 797         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 798         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 799         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 800         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 801         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 802
 803         ieee80211_wake_queues(mvm->hw);
 804
 805         /* cleanup all stale references (scan, roc), but keep the
 806          * ucode_down ref until reconfig is complete */
 807         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 808
 809         /* clear any stale d0i3 state */
 810         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 811
 812         mvm->vif_count = 0;
 813         mvm->rx_ba_sessions = 0;
 814 }
 815
 816 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 817 {
 818         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 819         int ret;
 820
 821         mutex_lock(&mvm->mutex);
 822
 823         /* Clean up some internal and mac80211 state on restart */
 824         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 825                 iwl_mvm_restart_cleanup(mvm);
 826
 827         ret = iwl_mvm_up(mvm);
 828
 829         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 830                 /* Something went wrong - we need to finish some cleanup
 831                  * that normally iwl_mvm_mac_restart_complete() below
 832                  * would do.
 833                  */
 834                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 835                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 836         }
 837
 838         mutex_unlock(&mvm->mutex);
 839
 840         return ret;
 841 }
 842
 843 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 844 {
 845         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 846         int ret;
 847
 848         mutex_lock(&mvm->mutex);
 849
 850         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 851         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 852         ret = iwl_mvm_update_quotas(mvm, NULL);
 853         if (ret)
 854                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 855                         ret);
 856
 857         /* allow transport/FW low power modes */
 858         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 859
 860         mutex_unlock(&mvm->mutex);
 861 }
 862
 863 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 864 {
 865         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 866
 867         flush_work(&mvm->d0i3_exit_work);
 868         flush_work(&mvm->async_handlers_wk);
 869
 870         mutex_lock(&mvm->mutex);
 871
 872         /* disallow low power states when the FW is down */
 873         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 874
 875         /* async_handlers_wk is now blocked */
 876
 877         /*
 878          * The work item could be running or queued if the
 879          * ROC time event stops just as we get here.
 880          */
 881         cancel_work_sync(&mvm->roc_done_wk);
 882
 883         iwl_trans_stop_device(mvm->trans);
 884
 885         iwl_mvm_async_handlers_purge(mvm);
 886         /* async_handlers_list is empty and will stay empty: HW is stopped */
 887
 888         /* the fw is stopped, the aux sta is dead: clean up driver state */
 889         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 890
 891         mutex_unlock(&mvm->mutex);
 892
 893         /*
 894          * The worker might have been waiting for the mutex, let it run and
 895          * discover that its list is now empty.
 896          */
 897         cancel_work_sync(&mvm->async_handlers_wk);
 898 }
 899
 900 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 901 {
 902         u16 i;
 903
 904         lockdep_assert_held(&mvm->mutex);
 905
 906         for (i = 0; i < NUM_PHY_CTX; i++)
 907                 if (!mvm->phy_ctxts[i].ref)
 908                         return &mvm->phy_ctxts[i];
 909
 910         IWL_ERR(mvm, "No available PHY context\n");
 911         return NULL;
 912 }
 913
 914 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 915                                 s8 tx_power)
 916 {
 917         /* FW is in charge of regulatory enforcement */
 918         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 919                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 920                 .pwr_restriction = cpu_to_le16(tx_power),
 921         };
 922
 923         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 924                                     sizeof(reduce_txpwr_cmd),
 925                                     &reduce_txpwr_cmd);
 926 }
 927
 928 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 929                                      struct ieee80211_vif *vif)
 930 {
 931         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 932         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 933         int ret;
 934
 935         /*
 936          * make sure D0i3 exit is completed, otherwise a target access
 937          * during tx queue configuration could be done when still in
 938          * D0i3 state.
 939          */
 940         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 941         if (ret)
 942                 return ret;
 943
 944         /*
 945          * Not much to do here. The stack will not allow interface
 946          * types or combinations that we didn't advertise, so we
 947          * don't really have to check the types.
 948          */
 949
 950         mutex_lock(&mvm->mutex);
 951
 952         /* Allocate resources for the MAC context, and add it to the fw  */
 953         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 954         if (ret)
 955                 goto out_unlock;
 956
 957         /* Counting number of interfaces is needed for legacy PM */
 958         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 959                 mvm->vif_count++;
 960
 961         /*
 962          * The AP binding flow can be done only after the beacon
 963          * template is configured (which happens only in the mac80211
 964          * start_ap() flow), and adding the broadcast station can happen
 965          * only after the binding.
 966          * In addition, since modifying the MAC before adding a bcast
 967          * station is not allowed by the FW, delay the adding of MAC context to
 968          * the point where we can also add the bcast station.
 969          * In short: there's not much we can do at this point, other than
 970          * allocating resources :)
 971          */
 972         if (vif->type == NL80211_IFTYPE_AP ||
 973             vif->type == NL80211_IFTYPE_ADHOC) {
 974                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 975
 976                 /*
 977                  * The firmware defines the TFD queue mask to only be relevant
 978                  * for *unicast* queues, so the multicast (CAB) queue should
 979                  * be excluded.
 980                  */
 981                 if (vif->type == NL80211_IFTYPE_AP)
 982                         qmask &= ~BIT(vif->cab_queue);
 983
 984                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 985                                                qmask,
 986                                                ieee80211_vif_type_p2p(vif));
 987                 if (ret) {
 988                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 989                         goto out_release;
 990                 }
 991
 992                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 993                 goto out_unlock;
 994         }
 995
 996         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 997         if (ret)
 998                 goto out_release;
 999
1000         ret = iwl_mvm_power_update_mac(mvm);
1001         if (ret)
1002                 goto out_release;
1003
1004         /* beacon filtering */
1005         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1006         if (ret)
1007                 goto out_remove_mac;
1008
1009         if (!mvm->bf_allowed_vif &&
1010             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1011                 mvm->bf_allowed_vif = mvmvif;
1012                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1013                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1014         }
1015
1016         /*
1017          * P2P_DEVICE interface does not have a channel context assigned to it,
1018          * so a dedicated PHY context is allocated to it and the corresponding
1019          * MAC context is bound to it at this stage.
1020          */
1021         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1022
1023                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1024                 if (!mvmvif->phy_ctxt) {
1025                         ret = -ENOSPC;
1026                         goto out_free_bf;
1027                 }
1028
1029                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1030                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1031                 if (ret)
1032                         goto out_unref_phy;
1033
1034                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1035                 if (ret)
1036                         goto out_unbind;
1037
1038                 /* Save a pointer to p2p device vif, so it can later be used to
1039                  * update the p2p device MAC when a GO is started/stopped */
1040                 mvm->p2p_device_vif = vif;
1041         }
1042
1043         iwl_mvm_vif_dbgfs_register(mvm, vif);
1044         goto out_unlock;
1045
1046  out_unbind:
1047         iwl_mvm_binding_remove_vif(mvm, vif);
1048  out_unref_phy:
1049         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1050  out_free_bf:
1051         if (mvm->bf_allowed_vif == mvmvif) {
1052                 mvm->bf_allowed_vif = NULL;
1053                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1054                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1055         }
1056  out_remove_mac:
1057         mvmvif->phy_ctxt = NULL;
1058         iwl_mvm_mac_ctxt_remove(mvm, vif);
1059  out_release:
1060         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1061                 mvm->vif_count--;
1062
1063         iwl_mvm_mac_ctxt_release(mvm, vif);
1064  out_unlock:
1065         mutex_unlock(&mvm->mutex);
1066
1067         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1068
1069         return ret;
1070 }
1071
1072 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1073                                         struct ieee80211_vif *vif)
1074 {
1075         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1076
1077         if (tfd_msk) {
1078                 mutex_lock(&mvm->mutex);
1079                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1080                 mutex_unlock(&mvm->mutex);
1081         }
1082
1083         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1084                 /*
1085                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1086                  * We assume here that all the packets sent to the OFFCHANNEL
1087                  * queue are sent in ROC session.
1088                  */
1089                 flush_work(&mvm->roc_done_wk);
1090         } else {
1091                 /*
1092                  * By now, all the AC queues are empty. The AGG queues are
1093                  * empty too. We already got all the Tx responses for all the
1094                  * packets in the queues. The drain work can have been
1095                  * triggered. Flush it.
1096                  */
1097                 flush_work(&mvm->sta_drained_wk);
1098         }
1099 }
1100
1101 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1102                                          struct ieee80211_vif *vif)
1103 {
1104         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1105         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1106
1107         iwl_mvm_prepare_mac_removal(mvm, vif);
1108
1109         mutex_lock(&mvm->mutex);
1110
1111         if (mvm->bf_allowed_vif == mvmvif) {
1112                 mvm->bf_allowed_vif = NULL;
1113                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1114                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1115         }
1116
1117         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1118
1119         /*
1120          * For AP/GO interface, the tear down of the resources allocated to the
1121          * interface is be handled as part of the stop_ap flow.
1122          */
1123         if (vif->type == NL80211_IFTYPE_AP ||
1124             vif->type == NL80211_IFTYPE_ADHOC) {
1125 #ifdef CONFIG_NL80211_TESTMODE
1126                 if (vif == mvm->noa_vif) {
1127                         mvm->noa_vif = NULL;
1128                         mvm->noa_duration = 0;
1129                 }
1130 #endif
1131                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1132                 goto out_release;
1133         }
1134
1135         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1136                 mvm->p2p_device_vif = NULL;
1137                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1138                 iwl_mvm_binding_remove_vif(mvm, vif);
1139                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1140                 mvmvif->phy_ctxt = NULL;
1141         }
1142
1143         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1144                 mvm->vif_count--;
1145
1146         iwl_mvm_power_update_mac(mvm);
1147         iwl_mvm_mac_ctxt_remove(mvm, vif);
1148
1149 out_release:
1150         iwl_mvm_mac_ctxt_release(mvm, vif);
1151         mutex_unlock(&mvm->mutex);
1152 }
1153
1154 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1155 {
1156         return 0;
1157 }
1158
1159 struct iwl_mvm_mc_iter_data {
1160         struct iwl_mvm *mvm;
1161         int port_id;
1162 };
1163
1164 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1165                                       struct ieee80211_vif *vif)
1166 {
1167         struct iwl_mvm_mc_iter_data *data = _data;
1168         struct iwl_mvm *mvm = data->mvm;
1169         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1170         int ret, len;
1171
1172         /* if we don't have free ports, mcast frames will be dropped */
1173         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1174                 return;
1175
1176         if (vif->type != NL80211_IFTYPE_STATION ||
1177             !vif->bss_conf.assoc)
1178                 return;
1179
1180         cmd->port_id = data->port_id++;
1181         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1182         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1183
1184         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1185         if (ret)
1186                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1187 }
1188
1189 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1190 {
1191         struct iwl_mvm_mc_iter_data iter_data = {
1192                 .mvm = mvm,
1193         };
1194
1195         lockdep_assert_held(&mvm->mutex);
1196
1197         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1198                 return;
1199
1200         ieee80211_iterate_active_interfaces_atomic(
1201                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1202                 iwl_mvm_mc_iface_iterator, &iter_data);
1203 }
1204
1205 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1206                                      struct netdev_hw_addr_list *mc_list)
1207 {
1208         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1209         struct iwl_mcast_filter_cmd *cmd;
1210         struct netdev_hw_addr *addr;
1211         int addr_count = netdev_hw_addr_list_count(mc_list);
1212         bool pass_all = false;
1213         int len;
1214
1215         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1216                 pass_all = true;
1217                 addr_count = 0;
1218         }
1219
1220         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1221         cmd = kzalloc(len, GFP_ATOMIC);
1222         if (!cmd)
1223                 return 0;
1224
1225         if (pass_all) {
1226                 cmd->pass_all = 1;
1227                 return (u64)(unsigned long)cmd;
1228         }
1229
1230         netdev_hw_addr_list_for_each(addr, mc_list) {
1231                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1232                                    cmd->count, addr->addr);
1233                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1234                        addr->addr, ETH_ALEN);
1235                 cmd->count++;
1236         }
1237
1238         return (u64)(unsigned long)cmd;
1239 }
1240
1241 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1242                                      unsigned int changed_flags,
1243                                      unsigned int *total_flags,
1244                                      u64 multicast)
1245 {
1246         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1247         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1248
1249         mutex_lock(&mvm->mutex);
1250
1251         /* replace previous configuration */
1252         kfree(mvm->mcast_filter_cmd);
1253         mvm->mcast_filter_cmd = cmd;
1254
1255         if (!cmd)
1256                 goto out;
1257
1258         iwl_mvm_recalc_multicast(mvm);
1259 out:
1260         mutex_unlock(&mvm->mutex);
1261         *total_flags = 0;
1262 }
1263
1264 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1265 struct iwl_bcast_iter_data {
1266         struct iwl_mvm *mvm;
1267         struct iwl_bcast_filter_cmd *cmd;
1268         u8 current_filter;
1269 };
1270
1271 static void
1272 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1273                          const struct iwl_fw_bcast_filter *in_filter,
1274                          struct iwl_fw_bcast_filter *out_filter)
1275 {
1276         struct iwl_fw_bcast_filter_attr *attr;
1277         int i;
1278
1279         memcpy(out_filter, in_filter, sizeof(*out_filter));
1280
1281         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1282                 attr = &out_filter->attrs[i];
1283
1284                 if (!attr->mask)
1285                         break;
1286
1287                 switch (attr->reserved1) {
1288                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1289                         if (vif->bss_conf.arp_addr_cnt != 1) {
1290                                 attr->mask = 0;
1291                                 continue;
1292                         }
1293
1294                         attr->val = vif->bss_conf.arp_addr_list[0];
1295                         break;
1296                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1297                         attr->val = *(__be32 *)&vif->addr[2];
1298                         break;
1299                 default:
1300                         break;
1301                 }
1302                 attr->reserved1 = 0;
1303                 out_filter->num_attrs++;
1304         }
1305 }
1306
1307 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1308                                           struct ieee80211_vif *vif)
1309 {
1310         struct iwl_bcast_iter_data *data = _data;
1311         struct iwl_mvm *mvm = data->mvm;
1312         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1313         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1314         struct iwl_fw_bcast_mac *bcast_mac;
1315         int i;
1316
1317         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1318                 return;
1319
1320         bcast_mac = &cmd->macs[mvmvif->id];
1321
1322         /*
1323          * enable filtering only for associated stations, but not for P2P
1324          * Clients
1325          */
1326         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1327             !vif->bss_conf.assoc)
1328                 return;
1329
1330         bcast_mac->default_discard = 1;
1331
1332         /* copy all configured filters */
1333         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1334                 /*
1335                  * Make sure we don't exceed our filters limit.
1336                  * if there is still a valid filter to be configured,
1337                  * be on the safe side and just allow bcast for this mac.
1338                  */
1339                 if (WARN_ON_ONCE(data->current_filter >=
1340                                  ARRAY_SIZE(cmd->filters))) {
1341                         bcast_mac->default_discard = 0;
1342                         bcast_mac->attached_filters = 0;
1343                         break;
1344                 }
1345
1346                 iwl_mvm_set_bcast_filter(vif,
1347                                          &mvm->bcast_filters[i],
1348                                          &cmd->filters[data->current_filter]);
1349
1350                 /* skip current filter if it contains no attributes */
1351                 if (!cmd->filters[data->current_filter].num_attrs)
1352                         continue;
1353
1354                 /* attach the filter to current mac */
1355                 bcast_mac->attached_filters |=
1356                                 cpu_to_le16(BIT(data->current_filter));
1357
1358                 data->current_filter++;
1359         }
1360 }
1361
1362 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1363                                     struct iwl_bcast_filter_cmd *cmd)
1364 {
1365         struct iwl_bcast_iter_data iter_data = {
1366                 .mvm = mvm,
1367                 .cmd = cmd,
1368         };
1369
1370         memset(cmd, 0, sizeof(*cmd));
1371         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1372         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1373
1374 #ifdef CONFIG_IWLWIFI_DEBUGFS
1375         /* use debugfs filters/macs if override is configured */
1376         if (mvm->dbgfs_bcast_filtering.override) {
1377                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1378                        sizeof(cmd->filters));
1379                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1380                        sizeof(cmd->macs));
1381                 return true;
1382         }
1383 #endif
1384
1385         /* if no filters are configured, do nothing */
1386         if (!mvm->bcast_filters)
1387                 return false;
1388
1389         /* configure and attach these filters for each associated sta vif */
1390         ieee80211_iterate_active_interfaces(
1391                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1392                 iwl_mvm_bcast_filter_iterator, &iter_data);
1393
1394         return true;
1395 }
1396 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1397                                           struct ieee80211_vif *vif)
1398 {
1399         struct iwl_bcast_filter_cmd cmd;
1400
1401         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1402                 return 0;
1403
1404         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1405                 return 0;
1406
1407         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1408                                     sizeof(cmd), &cmd);
1409 }
1410 #else
1411 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1412                                                  struct ieee80211_vif *vif)
1413 {
1414         return 0;
1415 }
1416 #endif
1417
1418 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1419 {
1420         struct ieee80211_sta *sta;
1421         struct iwl_mvm_sta *mvmsta;
1422         int i;
1423
1424         lockdep_assert_held(&mvm->mutex);
1425
1426         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1427                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1428                                                 lockdep_is_held(&mvm->mutex));
1429                 if (!sta || IS_ERR(sta) || !sta->tdls)
1430                         continue;
1431
1432                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1433                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1434                                 NL80211_TDLS_TEARDOWN,
1435                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1436                                 GFP_KERNEL);
1437         }
1438 }
1439
1440 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1441                                              struct ieee80211_vif *vif,
1442                                              struct ieee80211_bss_conf *bss_conf,
1443                                              u32 changes)
1444 {
1445         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1446         int ret;
1447
1448         /*
1449          * Re-calculate the tsf id, as the master-slave relations depend on the
1450          * beacon interval, which was not known when the station interface was
1451          * added.
1452          */
1453         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1454                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1455
1456         /*
1457          * If we're not associated yet, take the (new) BSSID before associating
1458          * so the firmware knows. If we're already associated, then use the old
1459          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1460          * branch for disassociation below.
1461          */
1462         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1463                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1464
1465         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1466         if (ret)
1467                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1468
1469         /* after sending it once, adopt mac80211 data */
1470         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1471         mvmvif->associated = bss_conf->assoc;
1472
1473         if (changes & BSS_CHANGED_ASSOC) {
1474                 if (bss_conf->assoc) {
1475                         /* add quota for this interface */
1476                         ret = iwl_mvm_update_quotas(mvm, NULL);
1477                         if (ret) {
1478                                 IWL_ERR(mvm, "failed to update quotas\n");
1479                                 return;
1480                         }
1481
1482                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1483                                      &mvm->status)) {
1484                                 /*
1485                                  * If we're restarting then the firmware will
1486                                  * obviously have lost synchronisation with
1487                                  * the AP. It will attempt to synchronise by
1488                                  * itself, but we can make it more reliable by
1489                                  * scheduling a session protection time event.
1490                                  *
1491                                  * The firmware needs to receive a beacon to
1492                                  * catch up with synchronisation, use 110% of
1493                                  * the beacon interval.
1494                                  *
1495                                  * Set a large maximum delay to allow for more
1496                                  * than a single interface.
1497                                  */
1498                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1499                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1500                                                         5 * dur, false);
1501                         }
1502
1503                         iwl_mvm_sf_update(mvm, vif, false);
1504                         iwl_mvm_power_vif_assoc(mvm, vif);
1505                         if (vif->p2p) {
1506                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1507                                 iwl_mvm_update_smps(mvm, vif,
1508                                                     IWL_MVM_SMPS_REQ_PROT,
1509                                                     IEEE80211_SMPS_DYNAMIC);
1510                         }
1511                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1512                         /*
1513                          * If update fails - SF might be running in associated
1514                          * mode while disassociated - which is forbidden.
1515                          */
1516                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1517                                   "Failed to update SF upon disassociation\n");
1518
1519                         /* remove AP station now that the MAC is unassoc */
1520                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1521                         if (ret)
1522                                 IWL_ERR(mvm, "failed to remove AP station\n");
1523
1524                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1525                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1526                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1527                         /* remove quota for this interface */
1528                         ret = iwl_mvm_update_quotas(mvm, NULL);
1529                         if (ret)
1530                                 IWL_ERR(mvm, "failed to update quotas\n");
1531
1532                         if (vif->p2p)
1533                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1534
1535                         /* this will take the cleared BSSID from bss_conf */
1536                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1537                         if (ret)
1538                                 IWL_ERR(mvm,
1539                                         "failed to update MAC %pM (clear after unassoc)\n",
1540                                         vif->addr);
1541                 }
1542
1543                 iwl_mvm_recalc_multicast(mvm);
1544                 iwl_mvm_configure_bcast_filter(mvm, vif);
1545
1546                 /* reset rssi values */
1547                 mvmvif->bf_data.ave_beacon_signal = 0;
1548
1549                 iwl_mvm_bt_coex_vif_change(mvm);
1550                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1551                                     IEEE80211_SMPS_AUTOMATIC);
1552         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1553                 /*
1554                  * We received a beacon _after_ association so
1555                  * remove the session protection.
1556                  */
1557                 iwl_mvm_remove_time_event(mvm, mvmvif,
1558                                           &mvmvif->time_event_data);
1559         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1560                               BSS_CHANGED_QOS)) {
1561                 ret = iwl_mvm_power_update_mac(mvm);
1562                 if (ret)
1563                         IWL_ERR(mvm, "failed to update power mode\n");
1564         }
1565
1566         if (changes & BSS_CHANGED_BEACON_INFO) {
1567                 iwl_mvm_sf_update(mvm, vif, false);
1568                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1569         }
1570
1571         if (changes & BSS_CHANGED_TXPOWER) {
1572                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1573                                 bss_conf->txpower);
1574                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1575         }
1576
1577         if (changes & BSS_CHANGED_CQM) {
1578                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1579                 /* reset cqm events tracking */
1580                 mvmvif->bf_data.last_cqm_event = 0;
1581                 if (mvmvif->bf_data.bf_enabled) {
1582                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1583                         if (ret)
1584                                 IWL_ERR(mvm,
1585                                         "failed to update CQM thresholds\n");
1586                 }
1587         }
1588
1589         if (changes & BSS_CHANGED_ARP_FILTER) {
1590                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1591                 iwl_mvm_configure_bcast_filter(mvm, vif);
1592         }
1593 }
1594
1595 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1596                                  struct ieee80211_vif *vif)
1597 {
1598         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1599         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1600         int ret;
1601
1602         /*
1603          * iwl_mvm_mac_ctxt_add() might read directly from the device
1604          * (the system time), so make sure it is available.
1605          */
1606         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1607         if (ret)
1608                 return ret;
1609
1610         mutex_lock(&mvm->mutex);
1611
1612         /* Send the beacon template */
1613         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1614         if (ret)
1615                 goto out_unlock;
1616
1617         /*
1618          * Re-calculate the tsf id, as the master-slave relations depend on the
1619          * beacon interval, which was not known when the AP interface was added.
1620          */
1621         if (vif->type == NL80211_IFTYPE_AP)
1622                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1623
1624         /* Add the mac context */
1625         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1626         if (ret)
1627                 goto out_unlock;
1628
1629         /* Perform the binding */
1630         ret = iwl_mvm_binding_add_vif(mvm, vif);
1631         if (ret)
1632                 goto out_remove;
1633
1634         /* Send the bcast station. At this stage the TBTT and DTIM time events
1635          * are added and applied to the scheduler */
1636         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1637         if (ret)
1638                 goto out_unbind;
1639
1640         /* must be set before quota calculations */
1641         mvmvif->ap_ibss_active = true;
1642
1643         /* power updated needs to be done before quotas */
1644         iwl_mvm_power_update_mac(mvm);
1645
1646         ret = iwl_mvm_update_quotas(mvm, NULL);
1647         if (ret)
1648                 goto out_quota_failed;
1649
1650         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1651         if (vif->p2p && mvm->p2p_device_vif)
1652                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1653
1654         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1655
1656         iwl_mvm_bt_coex_vif_change(mvm);
1657
1658         /* we don't support TDLS during DCM */
1659         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1660                 iwl_mvm_teardown_tdls_peers(mvm);
1661
1662         mutex_unlock(&mvm->mutex);
1663         return 0;
1664
1665 out_quota_failed:
1666         iwl_mvm_power_update_mac(mvm);
1667         mvmvif->ap_ibss_active = false;
1668         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1669 out_unbind:
1670         iwl_mvm_binding_remove_vif(mvm, vif);
1671 out_remove:
1672         iwl_mvm_mac_ctxt_remove(mvm, vif);
1673 out_unlock:
1674         mutex_unlock(&mvm->mutex);
1675         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1676         return ret;
1677 }
1678
1679 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1680                                  struct ieee80211_vif *vif)
1681 {
1682         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1683         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1684
1685         iwl_mvm_prepare_mac_removal(mvm, vif);
1686
1687         mutex_lock(&mvm->mutex);
1688
1689         /* Handle AP stop while in CSA */
1690         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1691                 iwl_mvm_remove_time_event(mvm, mvmvif,
1692                                           &mvmvif->time_event_data);
1693                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1694         }
1695
1696         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1697                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1698                 mvm->csa_tx_block_bcn_timeout = 0;
1699         }
1700
1701         mvmvif->ap_ibss_active = false;
1702         mvm->ap_last_beacon_gp2 = 0;
1703
1704         iwl_mvm_bt_coex_vif_change(mvm);
1705
1706         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1707
1708         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1709         if (vif->p2p && mvm->p2p_device_vif)
1710                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1711
1712         iwl_mvm_update_quotas(mvm, NULL);
1713         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1714         iwl_mvm_binding_remove_vif(mvm, vif);
1715
1716         iwl_mvm_power_update_mac(mvm);
1717
1718         iwl_mvm_mac_ctxt_remove(mvm, vif);
1719
1720         mutex_unlock(&mvm->mutex);
1721 }
1722
1723 static void
1724 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1725                                  struct ieee80211_vif *vif,
1726                                  struct ieee80211_bss_conf *bss_conf,
1727                                  u32 changes)
1728 {
1729         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1730
1731         /* Changes will be applied when the AP/IBSS is started */
1732         if (!mvmvif->ap_ibss_active)
1733                 return;
1734
1735         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1736                        BSS_CHANGED_BANDWIDTH) &&
1737             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1738                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1739
1740         /* Need to send a new beacon template to the FW */
1741         if (changes & BSS_CHANGED_BEACON &&
1742             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1743                 IWL_WARN(mvm, "Failed updating beacon data\n");
1744 }
1745
1746 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1747                                      struct ieee80211_vif *vif,
1748                                      struct ieee80211_bss_conf *bss_conf,
1749                                      u32 changes)
1750 {
1751         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1752
1753         /*
1754          * iwl_mvm_bss_info_changed_station() might call
1755          * iwl_mvm_protect_session(), which reads directly from
1756          * the device (the system time), so make sure it is available.
1757          */
1758         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1759                 return;
1760
1761         mutex_lock(&mvm->mutex);
1762
1763         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1764                 iwl_mvm_scan_offload_stop(mvm, true);
1765
1766         switch (vif->type) {
1767         case NL80211_IFTYPE_STATION:
1768                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1769                 break;
1770         case NL80211_IFTYPE_AP:
1771         case NL80211_IFTYPE_ADHOC:
1772                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1773                 break;
1774         default:
1775                 /* shouldn't happen */
1776                 WARN_ON_ONCE(1);
1777         }
1778
1779         mutex_unlock(&mvm->mutex);
1780         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1781 }
1782
1783 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1784                                           enum iwl_scan_status scan_type)
1785 {
1786         int ret;
1787         bool wait_for_handlers = false;
1788
1789         mutex_lock(&mvm->mutex);
1790
1791         if (mvm->scan_status != scan_type) {
1792                 ret = 0;
1793                 /* make sure there are no pending notifications */
1794                 wait_for_handlers = true;
1795                 goto out;
1796         }
1797
1798         switch (scan_type) {
1799         case IWL_MVM_SCAN_SCHED:
1800                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1801                 break;
1802         case IWL_MVM_SCAN_OS:
1803                 ret = iwl_mvm_cancel_scan(mvm);
1804                 break;
1805         case IWL_MVM_SCAN_NONE:
1806         default:
1807                 WARN_ON_ONCE(1);
1808                 ret = -EINVAL;
1809                 break;
1810         }
1811         if (ret)
1812                 goto out;
1813
1814         wait_for_handlers = true;
1815 out:
1816         mutex_unlock(&mvm->mutex);
1817
1818         /* make sure we consume the completion notification */
1819         if (wait_for_handlers)
1820                 iwl_mvm_wait_for_async_handlers(mvm);
1821
1822         return ret;
1823 }
1824 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1825                                struct ieee80211_vif *vif,
1826                                struct ieee80211_scan_request *hw_req)
1827 {
1828         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1829         struct cfg80211_scan_request *req = &hw_req->req;
1830         int ret;
1831
1832         if (req->n_channels == 0 ||
1833             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1834                 return -EINVAL;
1835
1836         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1837         if (ret)
1838                 return ret;
1839
1840         mutex_lock(&mvm->mutex);
1841
1842         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1843                 ret = -EBUSY;
1844                 goto out;
1845         }
1846
1847         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1848
1849         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1850                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1851         else
1852                 ret = iwl_mvm_scan_request(mvm, vif, req);
1853
1854         if (ret)
1855                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1856 out:
1857         mutex_unlock(&mvm->mutex);
1858         return ret;
1859 }
1860
1861 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1862                                        struct ieee80211_vif *vif)
1863 {
1864         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1865
1866         mutex_lock(&mvm->mutex);
1867
1868         iwl_mvm_cancel_scan(mvm);
1869
1870         mutex_unlock(&mvm->mutex);
1871 }
1872
1873 static void
1874 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1875                                   struct ieee80211_sta *sta, u16 tids,
1876                                   int num_frames,
1877                                   enum ieee80211_frame_release_type reason,
1878                                   bool more_data)
1879 {
1880         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1881
1882         /* Called when we need to transmit (a) frame(s) from mac80211 */
1883
1884         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1885                                           tids, more_data, false);
1886 }
1887
1888 static void
1889 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1890                                     struct ieee80211_sta *sta, u16 tids,
1891                                     int num_frames,
1892                                     enum ieee80211_frame_release_type reason,
1893                                     bool more_data)
1894 {
1895         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1896
1897         /* Called when we need to transmit (a) frame(s) from agg queue */
1898
1899         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1900                                           tids, more_data, true);
1901 }
1902
1903 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1904                                    struct ieee80211_vif *vif,
1905                                    enum sta_notify_cmd cmd,
1906                                    struct ieee80211_sta *sta)
1907 {
1908         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1909         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1910         int tid;
1911
1912         switch (cmd) {
1913         case STA_NOTIFY_SLEEP:
1914                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1915                         ieee80211_sta_block_awake(hw, sta, true);
1916                 spin_lock_bh(&mvmsta->lock);
1917                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1918                         struct iwl_mvm_tid_data *tid_data;
1919
1920                         tid_data = &mvmsta->tid_data[tid];
1921                         if (tid_data->state != IWL_AGG_ON &&
1922                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1923                                 continue;
1924                         if (iwl_mvm_tid_queued(tid_data) == 0)
1925                                 continue;
1926                         ieee80211_sta_set_buffered(sta, tid, true);
1927                 }
1928                 spin_unlock_bh(&mvmsta->lock);
1929                 /*
1930                  * The fw updates the STA to be asleep. Tx packets on the Tx
1931                  * queues to this station will not be transmitted. The fw will
1932                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1933                  */
1934                 break;
1935         case STA_NOTIFY_AWAKE:
1936                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1937                         break;
1938                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1939                 break;
1940         default:
1941                 break;
1942         }
1943 }
1944
1945 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1946                                        struct ieee80211_vif *vif,
1947                                        struct ieee80211_sta *sta)
1948 {
1949         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1950         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1951
1952         /*
1953          * This is called before mac80211 does RCU synchronisation,
1954          * so here we already invalidate our internal RCU-protected
1955          * station pointer. The rest of the code will thus no longer
1956          * be able to find the station this way, and we don't rely
1957          * on further RCU synchronisation after the sta_state()
1958          * callback deleted the station.
1959          */
1960         mutex_lock(&mvm->mutex);
1961         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1962                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1963                                    ERR_PTR(-ENOENT));
1964         mutex_unlock(&mvm->mutex);
1965 }
1966
1967 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1968 {
1969         struct ieee80211_sta *sta;
1970         struct iwl_mvm_sta *mvmsta;
1971         int count = 0;
1972         int i;
1973
1974         lockdep_assert_held(&mvm->mutex);
1975
1976         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1977                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1978                                                 lockdep_is_held(&mvm->mutex));
1979                 if (!sta || IS_ERR(sta) || !sta->tdls)
1980                         continue;
1981
1982                 if (vif) {
1983                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1984                         if (mvmsta->vif != vif)
1985                                 continue;
1986                 }
1987
1988                 count++;
1989         }
1990
1991         return count;
1992 }
1993
1994 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1995                                       struct ieee80211_vif *vif,
1996                                       bool sta_added)
1997 {
1998         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1999
2000         /*
2001          * Disable ps when the first TDLS sta is added and re-enable it
2002          * when the last TDLS sta is removed
2003          */
2004         if ((tdls_sta_cnt == 1 && sta_added) ||
2005             (tdls_sta_cnt == 0 && !sta_added))
2006                 iwl_mvm_power_update_mac(mvm);
2007 }
2008
2009 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2010                                  struct ieee80211_vif *vif,
2011                                  struct ieee80211_sta *sta,
2012                                  enum ieee80211_sta_state old_state,
2013                                  enum ieee80211_sta_state new_state)
2014 {
2015         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2016         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2017         int ret;
2018
2019         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2020                            sta->addr, old_state, new_state);
2021
2022         /* this would be a mac80211 bug ... but don't crash */
2023         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2024                 return -EINVAL;
2025
2026         /* if a STA is being removed, reuse its ID */
2027         flush_work(&mvm->sta_drained_wk);
2028
2029         mutex_lock(&mvm->mutex);
2030         if (old_state == IEEE80211_STA_NOTEXIST &&
2031             new_state == IEEE80211_STA_NONE) {
2032                 /*
2033                  * Firmware bug - it'll crash if the beacon interval is less
2034                  * than 16. We can't avoid connecting at all, so refuse the
2035                  * station state change, this will cause mac80211 to abandon
2036                  * attempts to connect to this AP, and eventually wpa_s will
2037                  * blacklist the AP...
2038                  */
2039                 if (vif->type == NL80211_IFTYPE_STATION &&
2040                     vif->bss_conf.beacon_int < 16) {
2041                         IWL_ERR(mvm,
2042                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2043                                 sta->addr, vif->bss_conf.beacon_int);
2044                         ret = -EINVAL;
2045                         goto out_unlock;
2046                 }
2047
2048                 if (sta->tdls &&
2049                     (vif->p2p ||
2050                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2051                                                 IWL_MVM_TDLS_STA_COUNT ||
2052                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2053                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2054                         ret = -EBUSY;
2055                         goto out_unlock;
2056                 }
2057
2058                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2059                 if (sta->tdls && ret == 0)
2060                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2061         } else if (old_state == IEEE80211_STA_NONE &&
2062                    new_state == IEEE80211_STA_AUTH) {
2063                 /*
2064                  * EBS may be disabled due to previous failures reported by FW.
2065                  * Reset EBS status here assuming environment has been changed.
2066                  */
2067                 mvm->last_ebs_successful = true;
2068                 ret = 0;
2069         } else if (old_state == IEEE80211_STA_AUTH &&
2070                    new_state == IEEE80211_STA_ASSOC) {
2071                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2072                 if (ret == 0)
2073                         iwl_mvm_rs_rate_init(mvm, sta,
2074                                              mvmvif->phy_ctxt->channel->band,
2075                                              true);
2076         } else if (old_state == IEEE80211_STA_ASSOC &&
2077                    new_state == IEEE80211_STA_AUTHORIZED) {
2078
2079                 /* we don't support TDLS during DCM */
2080                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2081                         iwl_mvm_teardown_tdls_peers(mvm);
2082
2083                 /* enable beacon filtering */
2084                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2085                 ret = 0;
2086         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2087                    new_state == IEEE80211_STA_ASSOC) {
2088                 /* disable beacon filtering */
2089                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2090                 ret = 0;
2091         } else if (old_state == IEEE80211_STA_ASSOC &&
2092                    new_state == IEEE80211_STA_AUTH) {
2093                 ret = 0;
2094         } else if (old_state == IEEE80211_STA_AUTH &&
2095                    new_state == IEEE80211_STA_NONE) {
2096                 ret = 0;
2097         } else if (old_state == IEEE80211_STA_NONE &&
2098                    new_state == IEEE80211_STA_NOTEXIST) {
2099                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2100                 if (sta->tdls)
2101                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2102         } else {
2103                 ret = -EIO;
2104         }
2105  out_unlock:
2106         mutex_unlock(&mvm->mutex);
2107
2108         return ret;
2109 }
2110
2111 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2112 {
2113         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2114
2115         mvm->rts_threshold = value;
2116
2117         return 0;
2118 }
2119
2120 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2121                                   struct ieee80211_vif *vif,
2122                                   struct ieee80211_sta *sta, u32 changed)
2123 {
2124         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2125
2126         if (vif->type == NL80211_IFTYPE_STATION &&
2127             changed & IEEE80211_RC_NSS_CHANGED)
2128                 iwl_mvm_sf_update(mvm, vif, false);
2129 }
2130
2131 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2132                                struct ieee80211_vif *vif, u16 ac,
2133                                const struct ieee80211_tx_queue_params *params)
2134 {
2135         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2136         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2137
2138         mvmvif->queue_params[ac] = *params;
2139
2140         /*
2141          * No need to update right away, we'll get BSS_CHANGED_QOS
2142          * The exception is P2P_DEVICE interface which needs immediate update.
2143          */
2144         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2145                 int ret;
2146
2147                 mutex_lock(&mvm->mutex);
2148                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2149                 mutex_unlock(&mvm->mutex);
2150                 return ret;
2151         }
2152         return 0;
2153 }
2154
2155 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2156                                       struct ieee80211_vif *vif)
2157 {
2158         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2159         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2160                            200 + vif->bss_conf.beacon_int);
2161         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2162                                100 + vif->bss_conf.beacon_int);
2163
2164         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2165                 return;
2166
2167         /*
2168          * iwl_mvm_protect_session() reads directly from the device
2169          * (the system time), so make sure it is available.
2170          */
2171         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2172                 return;
2173
2174         mutex_lock(&mvm->mutex);
2175         /* Try really hard to protect the session and hear a beacon */
2176         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2177         mutex_unlock(&mvm->mutex);
2178
2179         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2180 }
2181
2182 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2183                                                   struct ieee80211_vif *vif)
2184 {
2185         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2186         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2187
2188         /*
2189          * iwl_mvm_protect_session() reads directly from the device
2190          * (the system time), so make sure it is available.
2191          */
2192         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2193                 return;
2194
2195         mutex_lock(&mvm->mutex);
2196         /* Protect the session to hear the TDLS setup response on the channel */
2197         iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
2198         mutex_unlock(&mvm->mutex);
2199
2200         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2201 }
2202
2203 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2204                                         struct ieee80211_vif *vif,
2205                                         struct cfg80211_sched_scan_request *req,
2206                                         struct ieee80211_scan_ies *ies)
2207 {
2208         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2209         int ret;
2210
2211         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2212         if (ret)
2213                 return ret;
2214
2215         mutex_lock(&mvm->mutex);
2216
2217         if (!iwl_mvm_is_idle(mvm)) {
2218                 ret = -EBUSY;
2219                 goto out;
2220         }
2221
2222         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2223                 ret = -EBUSY;
2224                 goto out;
2225         }
2226
2227         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2228
2229         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2230                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2231                 if (ret)
2232                         goto err;
2233         }
2234
2235         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2236         if (ret)
2237                 goto err;
2238
2239         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2240                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2241         else
2242                 ret = iwl_mvm_sched_scan_start(mvm, req);
2243
2244         if (!ret)
2245                 goto out;
2246 err:
2247         mvm->scan_status = IWL_MVM_SCAN_NONE;
2248 out:
2249         mutex_unlock(&mvm->mutex);
2250         return ret;
2251 }
2252
2253 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2254                                        struct ieee80211_vif *vif)
2255 {
2256         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2257         int ret;
2258
2259         mutex_lock(&mvm->mutex);
2260         ret = iwl_mvm_scan_offload_stop(mvm, false);
2261         mutex_unlock(&mvm->mutex);
2262         iwl_mvm_wait_for_async_handlers(mvm);
2263
2264         return ret;
2265 }
2266
2267 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2268                                enum set_key_cmd cmd,
2269                                struct ieee80211_vif *vif,
2270                                struct ieee80211_sta *sta,
2271                                struct ieee80211_key_conf *key)
2272 {
2273         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2274         int ret;
2275
2276         if (iwlwifi_mod_params.sw_crypto) {
2277                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2278                 return -EOPNOTSUPP;
2279         }
2280
2281         switch (key->cipher) {
2282         case WLAN_CIPHER_SUITE_TKIP:
2283                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2284                 /* fall-through */
2285         case WLAN_CIPHER_SUITE_CCMP:
2286                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2287                 break;
2288         case WLAN_CIPHER_SUITE_AES_CMAC:
2289                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2290                 break;
2291         case WLAN_CIPHER_SUITE_WEP40:
2292         case WLAN_CIPHER_SUITE_WEP104:
2293                 /*
2294                  * Support for TX only, at least for now, so accept
2295                  * the key and do nothing else. Then mac80211 will
2296                  * pass it for TX but we don't have to use it for RX.
2297                  */
2298                 return 0;
2299         default:
2300                 /* currently FW supports only one optional cipher scheme */
2301                 if (hw->n_cipher_schemes &&
2302                     hw->cipher_schemes->cipher == key->cipher)
2303                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2304                 else
2305                         return -EOPNOTSUPP;
2306         }
2307
2308         mutex_lock(&mvm->mutex);
2309
2310         switch (cmd) {
2311         case SET_KEY:
2312                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2313                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2314                         /*
2315                          * GTK on AP interface is a TX-only key, return 0;
2316                          * on IBSS they're per-station and because we're lazy
2317                          * we don't support them for RX, so do the same.
2318                          */
2319                         ret = 0;
2320                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2321                         break;
2322                 }
2323
2324                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2325                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2326                 if (ret) {
2327                         IWL_WARN(mvm, "set key failed\n");
2328                         /*
2329                          * can't add key for RX, but we don't need it
2330                          * in the device for TX so still return 0
2331                          */
2332                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2333                         ret = 0;
2334                 }
2335
2336                 break;
2337         case DISABLE_KEY:
2338                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2339                         ret = 0;
2340                         break;
2341                 }
2342
2343                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2344                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2345                 break;
2346         default:
2347                 ret = -EINVAL;
2348         }
2349
2350         mutex_unlock(&mvm->mutex);
2351         return ret;
2352 }
2353
2354 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2355                                         struct ieee80211_vif *vif,
2356                                         struct ieee80211_key_conf *keyconf,
2357                                         struct ieee80211_sta *sta,
2358                                         u32 iv32, u16 *phase1key)
2359 {
2360         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2361
2362         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2363                 return;
2364
2365         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2366 }
2367
2368
2369 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2370                                struct iwl_rx_packet *pkt, void *data)
2371 {
2372         struct iwl_mvm *mvm =
2373                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2374         struct iwl_hs20_roc_res *resp;
2375         int resp_len = iwl_rx_packet_payload_len(pkt);
2376         struct iwl_mvm_time_event_data *te_data = data;
2377
2378         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2379                 return true;
2380
2381         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2382                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2383                 return true;
2384         }
2385
2386         resp = (void *)pkt->data;
2387
2388         IWL_DEBUG_TE(mvm,
2389                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2390                      resp->status, resp->event_unique_id);
2391
2392         te_data->uid = le32_to_cpu(resp->event_unique_id);
2393         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2394                      te_data->uid);
2395
2396         spin_lock_bh(&mvm->time_event_lock);
2397         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2398         spin_unlock_bh(&mvm->time_event_lock);
2399
2400         return true;
2401 }
2402
2403 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2404 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2405                                     struct ieee80211_channel *channel,
2406                                     struct ieee80211_vif *vif,
2407                                     int duration)
2408 {
2409         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2410         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2411         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2412         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2413         struct iwl_notification_wait wait_time_event;
2414         struct iwl_hs20_roc_req aux_roc_req = {
2415                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2416                 .id_and_color =
2417                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2418                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2419                 /* Set the channel info data */
2420                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2421                         PHY_BAND_24 : PHY_BAND_5,
2422                 .channel_info.channel = channel->hw_value,
2423                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2424                 /* Set the time and duration */
2425                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2426                 .apply_time_max_delay =
2427                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2428                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2429          };
2430
2431         /* Set the node address */
2432         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2433
2434         te_data->vif = vif;
2435         te_data->duration = duration;
2436         te_data->id = HOT_SPOT_CMD;
2437
2438         lockdep_assert_held(&mvm->mutex);
2439
2440         spin_lock_bh(&mvm->time_event_lock);
2441         list_add_tail(&te_data->list, &mvm->time_event_list);
2442         spin_unlock_bh(&mvm->time_event_lock);
2443
2444         /*
2445          * Use a notification wait, which really just processes the
2446          * command response and doesn't wait for anything, in order
2447          * to be able to process the response and get the UID inside
2448          * the RX path. Using CMD_WANT_SKB doesn't work because it
2449          * stores the buffer and then wakes up this thread, by which
2450          * time another notification (that the time event started)
2451          * might already be processed unsuccessfully.
2452          */
2453         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2454                                    time_event_response,
2455                                    ARRAY_SIZE(time_event_response),
2456                                    iwl_mvm_rx_aux_roc, te_data);
2457
2458         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2459                                    &aux_roc_req);
2460
2461         if (res) {
2462                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2463                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2464                 goto out_clear_te;
2465         }
2466
2467         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2468         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2469         /* should never fail */
2470         WARN_ON_ONCE(res);
2471
2472         if (res) {
2473  out_clear_te:
2474                 spin_lock_bh(&mvm->time_event_lock);
2475                 iwl_mvm_te_clear_data(mvm, te_data);
2476                 spin_unlock_bh(&mvm->time_event_lock);
2477         }
2478
2479         return res;
2480 }
2481
2482 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2483                        struct ieee80211_vif *vif,
2484                        struct ieee80211_channel *channel,
2485                        int duration,
2486                        enum ieee80211_roc_type type)
2487 {
2488         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2489         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2490         struct cfg80211_chan_def chandef;
2491         struct iwl_mvm_phy_ctxt *phy_ctxt;
2492         int ret, i;
2493
2494         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2495                            duration, type);
2496
2497         switch (vif->type) {
2498         case NL80211_IFTYPE_STATION:
2499                 /* Use aux roc framework (HS20) */
2500                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2501                                                vif, duration);
2502                 return ret;
2503         case NL80211_IFTYPE_P2P_DEVICE:
2504                 /* handle below */
2505                 break;
2506         default:
2507                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2508                 return -EINVAL;
2509         }
2510
2511         mutex_lock(&mvm->mutex);
2512
2513         for (i = 0; i < NUM_PHY_CTX; i++) {
2514                 phy_ctxt = &mvm->phy_ctxts[i];
2515                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2516                         continue;
2517
2518                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2519                         /*
2520                          * Unbind the P2P_DEVICE from the current PHY context,
2521                          * and if the PHY context is not used remove it.
2522                          */
2523                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2524                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2525                                 goto out_unlock;
2526
2527                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2528
2529                         /* Bind the P2P_DEVICE to the current PHY Context */
2530                         mvmvif->phy_ctxt = phy_ctxt;
2531
2532                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2533                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2534                                 goto out_unlock;
2535
2536                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2537                         goto schedule_time_event;
2538                 }
2539         }
2540
2541         /* Need to update the PHY context only if the ROC channel changed */
2542         if (channel == mvmvif->phy_ctxt->channel)
2543                 goto schedule_time_event;
2544
2545         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2546
2547         /*
2548          * Change the PHY context configuration as it is currently referenced
2549          * only by the P2P Device MAC
2550          */
2551         if (mvmvif->phy_ctxt->ref == 1) {
2552                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2553                                                &chandef, 1, 1);
2554                 if (ret)
2555                         goto out_unlock;
2556         } else {
2557                 /*
2558                  * The PHY context is shared with other MACs. Need to remove the
2559                  * P2P Device from the binding, allocate an new PHY context and
2560                  * create a new binding
2561                  */
2562                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2563                 if (!phy_ctxt) {
2564                         ret = -ENOSPC;
2565                         goto out_unlock;
2566                 }
2567
2568                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2569                                                1, 1);
2570                 if (ret) {
2571                         IWL_ERR(mvm, "Failed to change PHY context\n");
2572                         goto out_unlock;
2573                 }
2574
2575                 /* Unbind the P2P_DEVICE from the current PHY context */
2576                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2577                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2578                         goto out_unlock;
2579
2580                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2581
2582                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2583                 mvmvif->phy_ctxt = phy_ctxt;
2584
2585                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2586                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2587                         goto out_unlock;
2588
2589                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2590         }
2591
2592 schedule_time_event:
2593         /* Schedule the time events */
2594         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2595
2596 out_unlock:
2597         mutex_unlock(&mvm->mutex);
2598         IWL_DEBUG_MAC80211(mvm, "leave\n");
2599         return ret;
2600 }
2601
2602 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2603 {
2604         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2605
2606         IWL_DEBUG_MAC80211(mvm, "enter\n");
2607
2608         mutex_lock(&mvm->mutex);
2609         iwl_mvm_stop_p2p_roc(mvm);
2610         mutex_unlock(&mvm->mutex);
2611
2612         IWL_DEBUG_MAC80211(mvm, "leave\n");
2613         return 0;
2614 }
2615
2616 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2617                                  struct ieee80211_chanctx_conf *ctx)
2618 {
2619         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2620         struct iwl_mvm_phy_ctxt *phy_ctxt;
2621         int ret;
2622
2623         lockdep_assert_held(&mvm->mutex);
2624
2625         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2626
2627         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2628         if (!phy_ctxt) {
2629                 ret = -ENOSPC;
2630                 goto out;
2631         }
2632
2633         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2634                                        ctx->rx_chains_static,
2635                                        ctx->rx_chains_dynamic);
2636         if (ret) {
2637                 IWL_ERR(mvm, "Failed to add PHY context\n");
2638                 goto out;
2639         }
2640
2641         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2642         *phy_ctxt_id = phy_ctxt->id;
2643 out:
2644         return ret;
2645 }
2646
2647 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2648                                struct ieee80211_chanctx_conf *ctx)
2649 {
2650         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2651         int ret;
2652
2653         mutex_lock(&mvm->mutex);
2654         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2655         mutex_unlock(&mvm->mutex);
2656
2657         return ret;
2658 }
2659
2660 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2661                                      struct ieee80211_chanctx_conf *ctx)
2662 {
2663         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2664         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2665
2666         lockdep_assert_held(&mvm->mutex);
2667
2668         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2669 }
2670
2671 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2672                                    struct ieee80211_chanctx_conf *ctx)
2673 {
2674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2675
2676         mutex_lock(&mvm->mutex);
2677         __iwl_mvm_remove_chanctx(mvm, ctx);
2678         mutex_unlock(&mvm->mutex);
2679 }
2680
2681 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2682                                    struct ieee80211_chanctx_conf *ctx,
2683                                    u32 changed)
2684 {
2685         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2686         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2687         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2688
2689         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2690                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2691                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2692                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2693                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2694                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2695                       phy_ctxt->ref, changed))
2696                 return;
2697
2698         mutex_lock(&mvm->mutex);
2699         iwl_mvm_bt_coex_vif_change(mvm);
2700         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2701                                  ctx->rx_chains_static,
2702                                  ctx->rx_chains_dynamic);
2703         mutex_unlock(&mvm->mutex);
2704 }
2705
2706 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2707                                         struct ieee80211_vif *vif,
2708                                         struct ieee80211_chanctx_conf *ctx,
2709                                         bool switching_chanctx)
2710 {
2711         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2712         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2713         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2714         int ret;
2715
2716         lockdep_assert_held(&mvm->mutex);
2717
2718         mvmvif->phy_ctxt = phy_ctxt;
2719
2720         switch (vif->type) {
2721         case NL80211_IFTYPE_AP:
2722                 /* Unless it's a CSA flow we have nothing to do here */
2723                 if (vif->csa_active) {
2724                         mvmvif->ap_ibss_active = true;
2725                         break;
2726                 }
2727         case NL80211_IFTYPE_ADHOC:
2728                 /*
2729                  * The AP binding flow is handled as part of the start_ap flow
2730                  * (in bss_info_changed), similarly for IBSS.
2731                  */
2732                 ret = 0;
2733                 goto out;
2734         case NL80211_IFTYPE_STATION:
2735                 break;
2736         case NL80211_IFTYPE_MONITOR:
2737                 /* always disable PS when a monitor interface is active */
2738                 mvmvif->ps_disabled = true;
2739                 break;
2740         default:
2741                 ret = -EINVAL;
2742                 goto out;
2743         }
2744
2745         ret = iwl_mvm_binding_add_vif(mvm, vif);
2746         if (ret)
2747                 goto out;
2748
2749         /*
2750          * Power state must be updated before quotas,
2751          * otherwise fw will complain.
2752          */
2753         iwl_mvm_power_update_mac(mvm);
2754
2755         /* Setting the quota at this stage is only required for monitor
2756          * interfaces. For the other types, the bss_info changed flow
2757          * will handle quota settings.
2758          */
2759         if (vif->type == NL80211_IFTYPE_MONITOR) {
2760                 mvmvif->monitor_active = true;
2761                 ret = iwl_mvm_update_quotas(mvm, NULL);
2762                 if (ret)
2763                         goto out_remove_binding;
2764         }
2765
2766         /* Handle binding during CSA */
2767         if ((vif->type == NL80211_IFTYPE_AP) ||
2768             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2769                 iwl_mvm_update_quotas(mvm, NULL);
2770                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2771         }
2772
2773         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2774                 struct iwl_mvm_sta *mvmsta;
2775
2776                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2777                                                           mvmvif->ap_sta_id);
2778
2779                 if (WARN_ON(!mvmsta))
2780                         goto out;
2781
2782                 /* TODO: only re-enable after the first beacon */
2783                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2784         }
2785
2786         goto out;
2787
2788 out_remove_binding:
2789         iwl_mvm_binding_remove_vif(mvm, vif);
2790         iwl_mvm_power_update_mac(mvm);
2791 out:
2792         if (ret)
2793                 mvmvif->phy_ctxt = NULL;
2794         return ret;
2795 }
2796 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2797                                       struct ieee80211_vif *vif,
2798                                       struct ieee80211_chanctx_conf *ctx)
2799 {
2800         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2801         int ret;
2802
2803         mutex_lock(&mvm->mutex);
2804         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2805         mutex_unlock(&mvm->mutex);
2806
2807         return ret;
2808 }
2809
2810 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2811                                            struct ieee80211_vif *vif,
2812                                            struct ieee80211_chanctx_conf *ctx,
2813                                            bool switching_chanctx)
2814 {
2815         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2816         struct ieee80211_vif *disabled_vif = NULL;
2817         struct iwl_mvm_sta *mvmsta;
2818
2819         lockdep_assert_held(&mvm->mutex);
2820
2821         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2822
2823         switch (vif->type) {
2824         case NL80211_IFTYPE_ADHOC:
2825                 goto out;
2826         case NL80211_IFTYPE_MONITOR:
2827                 mvmvif->monitor_active = false;
2828                 mvmvif->ps_disabled = false;
2829                 break;
2830         case NL80211_IFTYPE_AP:
2831                 /* This part is triggered only during CSA */
2832                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2833                         goto out;
2834
2835                 /* Set CS bit on all the stations */
2836                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2837
2838                 /* Save blocked iface, the timeout is set on the next beacon */
2839                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2840
2841                 mvmvif->ap_ibss_active = false;
2842                 break;
2843         case NL80211_IFTYPE_STATION:
2844                 if (!switching_chanctx)
2845                         break;
2846
2847                 disabled_vif = vif;
2848
2849                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2850                                                           mvmvif->ap_sta_id);
2851
2852                 if (!WARN_ON(!mvmsta))
2853                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2854
2855                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2856                 break;
2857         default:
2858                 break;
2859         }
2860
2861         iwl_mvm_update_quotas(mvm, disabled_vif);
2862         iwl_mvm_binding_remove_vif(mvm, vif);
2863
2864 out:
2865         mvmvif->phy_ctxt = NULL;
2866         iwl_mvm_power_update_mac(mvm);
2867 }
2868
2869 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2870                                          struct ieee80211_vif *vif,
2871                                          struct ieee80211_chanctx_conf *ctx)
2872 {
2873         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2874
2875         mutex_lock(&mvm->mutex);
2876         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2877         mutex_unlock(&mvm->mutex);
2878 }
2879
2880 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2881                                       struct ieee80211_vif_chanctx_switch *vifs,
2882                                       int n_vifs,
2883                                       enum ieee80211_chanctx_switch_mode mode)
2884 {
2885         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2886         int ret;
2887
2888         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2889         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2890                 return -EOPNOTSUPP;
2891
2892         mutex_lock(&mvm->mutex);
2893         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2894         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2895
2896         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2897         if (ret) {
2898                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2899                 goto out_reassign;
2900         }
2901
2902         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2903                                            true);
2904         if (ret) {
2905                 IWL_ERR(mvm,
2906                         "failed to assign new_ctx during channel switch\n");
2907                 goto out_remove;
2908         }
2909
2910         /* we don't support TDLS during DCM - can be caused by channel switch */
2911         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2912                 iwl_mvm_teardown_tdls_peers(mvm);
2913
2914         goto out;
2915
2916 out_remove:
2917         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2918
2919 out_reassign:
2920         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2921         if (ret) {
2922                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2923                 goto out_restart;
2924         }
2925
2926         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2927                                            true);
2928         if (ret) {
2929                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2930                 goto out_restart;
2931         }
2932
2933         goto out;
2934
2935 out_restart:
2936         /* things keep failing, better restart the hw */
2937         iwl_mvm_nic_restart(mvm, false);
2938
2939 out:
2940         mutex_unlock(&mvm->mutex);
2941         return ret;
2942 }
2943
2944 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2945                            struct ieee80211_sta *sta,
2946                            bool set)
2947 {
2948         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2949         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2950
2951         if (!mvm_sta || !mvm_sta->vif) {
2952                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2953                 return -EINVAL;
2954         }
2955
2956         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2957 }
2958
2959 #ifdef CONFIG_NL80211_TESTMODE
2960 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2961         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2962         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2963         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2964 };
2965
2966 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2967                                       struct ieee80211_vif *vif,
2968                                       void *data, int len)
2969 {
2970         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2971         int err;
2972         u32 noa_duration;
2973
2974         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2975         if (err)
2976                 return err;
2977
2978         if (!tb[IWL_MVM_TM_ATTR_CMD])
2979                 return -EINVAL;
2980
2981         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2982         case IWL_MVM_TM_CMD_SET_NOA:
2983                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2984                     !vif->bss_conf.enable_beacon ||
2985                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2986                         return -EINVAL;
2987
2988                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2989                 if (noa_duration >= vif->bss_conf.beacon_int)
2990                         return -EINVAL;
2991
2992                 mvm->noa_duration = noa_duration;
2993                 mvm->noa_vif = vif;
2994
2995                 return iwl_mvm_update_quotas(mvm, NULL);
2996         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2997                 /* must be associated client vif - ignore authorized */
2998                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2999                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3000                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3001                         return -EINVAL;
3002
3003                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3004                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3005                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3006         }
3007
3008         return -EOPNOTSUPP;
3009 }
3010
3011 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3012                                     struct ieee80211_vif *vif,
3013                                     void *data, int len)
3014 {
3015         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3016         int err;
3017
3018         mutex_lock(&mvm->mutex);
3019         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3020         mutex_unlock(&mvm->mutex);
3021
3022         return err;
3023 }
3024 #endif
3025
3026 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3027                                           struct ieee80211_vif *vif,
3028                                           struct cfg80211_chan_def *chandef)
3029 {
3030         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3031         struct ieee80211_vif *csa_vif;
3032
3033         mutex_lock(&mvm->mutex);
3034
3035         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3036                                             lockdep_is_held(&mvm->mutex));
3037         if (WARN(csa_vif && csa_vif->csa_active,
3038                  "Another CSA is already in progress"))
3039                 goto out_unlock;
3040
3041         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3042                            chandef->center_freq1);
3043         rcu_assign_pointer(mvm->csa_vif, vif);
3044
3045 out_unlock:
3046         mutex_unlock(&mvm->mutex);
3047 }
3048
3049 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3050                               struct ieee80211_vif *vif, u32 queues, bool drop)
3051 {
3052         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3053         struct iwl_mvm_vif *mvmvif;
3054         struct iwl_mvm_sta *mvmsta;
3055
3056         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3057                 return;
3058
3059         mutex_lock(&mvm->mutex);
3060         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3061         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3062
3063         if (WARN_ON_ONCE(!mvmsta))
3064                 goto done;
3065
3066         if (drop) {
3067                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3068                         IWL_ERR(mvm, "flush request fail\n");
3069         } else {
3070                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3071                                               mvmsta->tfd_queue_msk);
3072         }
3073 done:
3074         mutex_unlock(&mvm->mutex);
3075 }
3076
3077 const struct ieee80211_ops iwl_mvm_hw_ops = {
3078         .tx = iwl_mvm_mac_tx,
3079         .ampdu_action = iwl_mvm_mac_ampdu_action,
3080         .start = iwl_mvm_mac_start,
3081         .restart_complete = iwl_mvm_mac_restart_complete,
3082         .stop = iwl_mvm_mac_stop,
3083         .add_interface = iwl_mvm_mac_add_interface,
3084         .remove_interface = iwl_mvm_mac_remove_interface,
3085         .config = iwl_mvm_mac_config,
3086         .prepare_multicast = iwl_mvm_prepare_multicast,
3087         .configure_filter = iwl_mvm_configure_filter,
3088         .bss_info_changed = iwl_mvm_bss_info_changed,
3089         .hw_scan = iwl_mvm_mac_hw_scan,
3090         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3091         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3092         .sta_state = iwl_mvm_mac_sta_state,
3093         .sta_notify = iwl_mvm_mac_sta_notify,
3094         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3095         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3096         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3097         .sta_rc_update = iwl_mvm_sta_rc_update,
3098         .conf_tx = iwl_mvm_mac_conf_tx,
3099         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3100         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3101         .flush = iwl_mvm_mac_flush,
3102         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3103         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3104         .set_key = iwl_mvm_mac_set_key,
3105         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3106         .remain_on_channel = iwl_mvm_roc,
3107         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3108         .add_chanctx = iwl_mvm_add_chanctx,
3109         .remove_chanctx = iwl_mvm_remove_chanctx,
3110         .change_chanctx = iwl_mvm_change_chanctx,
3111         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3112         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3113         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3114
3115         .start_ap = iwl_mvm_start_ap_ibss,
3116         .stop_ap = iwl_mvm_stop_ap_ibss,
3117         .join_ibss = iwl_mvm_start_ap_ibss,
3118         .leave_ibss = iwl_mvm_stop_ap_ibss,
3119
3120         .set_tim = iwl_mvm_set_tim,
3121
3122         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3123
3124         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3125
3126 #ifdef CONFIG_PM_SLEEP
3127         /* look at d3.c */
3128         .suspend = iwl_mvm_suspend,
3129         .resume = iwl_mvm_resume,
3130         .set_wakeup = iwl_mvm_set_wakeup,
3131         .set_rekey_data = iwl_mvm_set_rekey_data,
3132 #if IS_ENABLED(CONFIG_IPV6)
3133         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3134 #endif
3135         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3136 #endif
3137 };