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
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  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
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  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 <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "fw-api-scan.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 258 {
 259         iwl_mvm_ref(mvm, ref_type);
 260
 261         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 262                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 263                                 HZ)) {
 264                 WARN_ON_ONCE(1);
 265                 iwl_mvm_unref(mvm, ref_type);
 266                 return -EIO;
 267         }
 268
 269         return 0;
 270 }
 271
 272 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 273 {
 274         int i;
 275
 276         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 277         for (i = 0; i < NUM_PHY_CTX; i++) {
 278                 mvm->phy_ctxts[i].id = i;
 279                 mvm->phy_ctxts[i].ref = 0;
 280         }
 281 }
 282
 283 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 284 {
 285         struct ieee80211_hw *hw = mvm->hw;
 286         int num_mac, ret, i;
 287
 288         /* Tell mac80211 our characteristics */
 289         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 290                     IEEE80211_HW_SPECTRUM_MGMT |
 291                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 292                     IEEE80211_HW_QUEUE_CONTROL |
 293                     IEEE80211_HW_WANT_MONITOR_VIF |
 294                     IEEE80211_HW_SUPPORTS_PS |
 295                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 296                     IEEE80211_HW_AMPDU_AGGREGATION |
 297                     IEEE80211_HW_TIMING_BEACON_ONLY |
 298                     IEEE80211_HW_CONNECTION_MONITOR |
 299                     IEEE80211_HW_CHANCTX_STA_CSA |
 300                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 301
 302         hw->queues = mvm->first_agg_queue;
 303         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 304         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 305                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 306         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 307         hw->rate_control_algorithm = "iwl-mvm-rs";
 308
 309         /*
 310          * Enable 11w if advertised by firmware and software crypto
 311          * is not enabled (as the firmware will interpret some mgmt
 312          * packets, so enabling it with software crypto isn't safe)
 313          */
 314         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 315             !iwlwifi_mod_params.sw_crypto)
 316                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 317
 318         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 319             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 320             !iwlwifi_mod_params.uapsd_disable) {
 321                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 322                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 323                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 324         }
 325
 326         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 327                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 328
 329         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 330         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 331         hw->chanctx_data_size = sizeof(u16);
 332
 333         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 334                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 335                 BIT(NL80211_IFTYPE_AP) |
 336                 BIT(NL80211_IFTYPE_P2P_GO) |
 337                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 338                 BIT(NL80211_IFTYPE_ADHOC);
 339
 340         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 341         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 342                                        REGULATORY_DISABLE_BEACON_HINTS;
 343
 344         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 345                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 346
 347         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 348                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 349
 350         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 351         hw->wiphy->n_iface_combinations =
 352                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 353
 354         hw->wiphy->max_remain_on_channel_duration = 10000;
 355         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 356
 357         /* Extract MAC address */
 358         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 359         hw->wiphy->addresses = mvm->addresses;
 360         hw->wiphy->n_addresses = 1;
 361
 362         /* Extract additional MAC addresses if available */
 363         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 364                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 365
 366         for (i = 1; i < num_mac; i++) {
 367                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 368                        ETH_ALEN);
 369                 mvm->addresses[i].addr[5]++;
 370                 hw->wiphy->n_addresses++;
 371         }
 372
 373         iwl_mvm_reset_phy_ctxts(mvm);
 374
 375         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 376
 377         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 378
 379         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 380                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 381                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 382         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 383                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 384                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 385
 386         hw->wiphy->hw_version = mvm->trans->hw_id;
 387
 388         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 389                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 390         else
 391                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 392
 393         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 394                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 395                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 396                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 397                 /* we create the 802.11 header and zero length SSID IE. */
 398                 hw->wiphy->max_sched_scan_ie_len =
 399                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 400         }
 401
 402         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 403                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 404                                NL80211_FEATURE_P2P_GO_OPPPS |
 405                                NL80211_FEATURE_DYNAMIC_SMPS |
 406                                NL80211_FEATURE_STATIC_SMPS;
 407
 408         if (mvm->fw->ucode_capa.capa[0] &
 409             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 410                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 411         if (mvm->fw->ucode_capa.capa[0] &
 412             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 413                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 414
 415         if (mvm->fw->ucode_capa.capa[0] &
 416             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 417                 hw->wiphy->features |=
 418                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 419
 420         if (mvm->fw->ucode_capa.capa[0] &
 421             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 422                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 423
 424         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 425
 426         /* currently FW API supports only one optional cipher scheme */
 427         if (mvm->fw->cs[0].cipher) {
 428                 mvm->hw->n_cipher_schemes = 1;
 429                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 430         }
 431
 432 #ifdef CONFIG_PM_SLEEP
 433         if (iwl_mvm_is_d0i3_supported(mvm) &&
 434             device_can_wakeup(mvm->trans->dev)) {
 435                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 436                 hw->wiphy->wowlan = &mvm->wowlan;
 437         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 438             mvm->trans->ops->d3_suspend &&
 439             mvm->trans->ops->d3_resume &&
 440             device_can_wakeup(mvm->trans->dev)) {
 441                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 442                                     WIPHY_WOWLAN_DISCONNECT |
 443                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 444                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 445                 if (!iwlwifi_mod_params.sw_crypto)
 446                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 447                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 448                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 449
 450                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 451                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 452                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 453                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 454                 hw->wiphy->wowlan = &mvm->wowlan;
 455         }
 456 #endif
 457
 458 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 459         /* assign default bcast filtering configuration */
 460         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 461 #endif
 462
 463         ret = iwl_mvm_leds_init(mvm);
 464         if (ret)
 465                 return ret;
 466
 467         ret = ieee80211_register_hw(mvm->hw);
 468         if (ret)
 469                 iwl_mvm_leds_exit(mvm);
 470
 471         return ret;
 472 }
 473
 474 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 475                              struct ieee80211_sta *sta,
 476                              struct sk_buff *skb)
 477 {
 478         struct iwl_mvm_sta *mvmsta;
 479         bool defer = false;
 480
 481         /*
 482          * double check the IN_D0I3 flag both before and after
 483          * taking the spinlock, in order to prevent taking
 484          * the spinlock when not needed.
 485          */
 486         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 487                 return false;
 488
 489         spin_lock(&mvm->d0i3_tx_lock);
 490         /*
 491          * testing the flag again ensures the skb dequeue
 492          * loop (on d0i3 exit) hasn't run yet.
 493          */
 494         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 495                 goto out;
 496
 497         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 498         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 499             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 500                 goto out;
 501
 502         __skb_queue_tail(&mvm->d0i3_tx, skb);
 503         ieee80211_stop_queues(mvm->hw);
 504
 505         /* trigger wakeup */
 506         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 507         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 508
 509         defer = true;
 510 out:
 511         spin_unlock(&mvm->d0i3_tx_lock);
 512         return defer;
 513 }
 514
 515 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 516                            struct ieee80211_tx_control *control,
 517                            struct sk_buff *skb)
 518 {
 519         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 520         struct ieee80211_sta *sta = control->sta;
 521         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 522         struct ieee80211_hdr *hdr = (void *)skb->data;
 523
 524         if (iwl_mvm_is_radio_killed(mvm)) {
 525                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 526                 goto drop;
 527         }
 528
 529         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 530             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 531             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 532                 goto drop;
 533
 534         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 535         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 536                      ieee80211_is_mgmt(hdr->frame_control) &&
 537                      !ieee80211_is_deauth(hdr->frame_control) &&
 538                      !ieee80211_is_disassoc(hdr->frame_control) &&
 539                      !ieee80211_is_action(hdr->frame_control)))
 540                 sta = NULL;
 541
 542         if (sta) {
 543                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 544                         return;
 545                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 546                         goto drop;
 547                 return;
 548         }
 549
 550         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 551                 goto drop;
 552         return;
 553  drop:
 554         ieee80211_free_txskb(hw, skb);
 555 }
 556
 557 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 558 {
 559         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 560                 return false;
 561         return true;
 562 }
 563
 564 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 565 {
 566         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 567                 return false;
 568         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 569                 return true;
 570
 571         /* enabled by default */
 572         return true;
 573 }
 574
 575 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 576                                     struct ieee80211_vif *vif,
 577                                     enum ieee80211_ampdu_mlme_action action,
 578                                     struct ieee80211_sta *sta, u16 tid,
 579                                     u16 *ssn, u8 buf_size)
 580 {
 581         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 582         int ret;
 583         bool tx_agg_ref = false;
 584
 585         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 586                      sta->addr, tid, action);
 587
 588         if (!(mvm->nvm_data->sku_cap_11n_enable))
 589                 return -EACCES;
 590
 591         /* return from D0i3 before starting a new Tx aggregation */
 592         switch (action) {
 593         case IEEE80211_AMPDU_TX_START:
 594         case IEEE80211_AMPDU_TX_STOP_CONT:
 595         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 596         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 597         case IEEE80211_AMPDU_TX_OPERATIONAL:
 598                 /*
 599                  * for tx start, wait synchronously until D0i3 exit to
 600                  * get the correct sequence number for the tid.
 601                  * additionally, some other ampdu actions use direct
 602                  * target access, which is not handled automatically
 603                  * by the trans layer (unlike commands), so wait for
 604                  * d0i3 exit in these cases as well.
 605                  */
 606                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 607                 if (ret)
 608                         return ret;
 609
 610                 tx_agg_ref = true;
 611                 break;
 612         default:
 613                 break;
 614         }
 615
 616         mutex_lock(&mvm->mutex);
 617
 618         switch (action) {
 619         case IEEE80211_AMPDU_RX_START:
 620                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 621                         ret = -EINVAL;
 622                         break;
 623                 }
 624                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 625                 break;
 626         case IEEE80211_AMPDU_RX_STOP:
 627                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 628                 break;
 629         case IEEE80211_AMPDU_TX_START:
 630                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 631                         ret = -EINVAL;
 632                         break;
 633                 }
 634                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 635                 break;
 636         case IEEE80211_AMPDU_TX_STOP_CONT:
 637                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 638                 break;
 639         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 640         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 641                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 642                 break;
 643         case IEEE80211_AMPDU_TX_OPERATIONAL:
 644                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 645                 break;
 646         default:
 647                 WARN_ON_ONCE(1);
 648                 ret = -EINVAL;
 649                 break;
 650         }
 651         mutex_unlock(&mvm->mutex);
 652
 653         /*
 654          * If the tid is marked as started, we won't use it for offloaded
 655          * traffic on the next D0i3 entry. It's safe to unref.
 656          */
 657         if (tx_agg_ref)
 658                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 659
 660         return ret;
 661 }
 662
 663 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 664                                      struct ieee80211_vif *vif)
 665 {
 666         struct iwl_mvm *mvm = data;
 667         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 668
 669         mvmvif->uploaded = false;
 670         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 671
 672         /* does this make sense at all? */
 673         mvmvif->color++;
 674
 675         spin_lock_bh(&mvm->time_event_lock);
 676         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 677         spin_unlock_bh(&mvm->time_event_lock);
 678
 679         mvmvif->phy_ctxt = NULL;
 680         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 681 }
 682
 683 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 684                                      const void *data, size_t datalen)
 685 {
 686         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 687         ssize_t bytes_read;
 688         ssize_t bytes_read_trans;
 689
 690         if (offset < dump_ptrs->op_mode_len) {
 691                 bytes_read = min_t(ssize_t, count,
 692                                    dump_ptrs->op_mode_len - offset);
 693                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 694                        bytes_read);
 695                 offset += bytes_read;
 696                 count -= bytes_read;
 697
 698                 if (count == 0)
 699                         return bytes_read;
 700         } else {
 701                 bytes_read = 0;
 702         }
 703
 704         if (!dump_ptrs->trans_ptr)
 705                 return bytes_read;
 706
 707         offset -= dump_ptrs->op_mode_len;
 708         bytes_read_trans = min_t(ssize_t, count,
 709                                  dump_ptrs->trans_ptr->len - offset);
 710         memcpy(buffer + bytes_read,
 711                (u8 *)dump_ptrs->trans_ptr->data + offset,
 712                bytes_read_trans);
 713
 714         return bytes_read + bytes_read_trans;
 715 }
 716
 717 static void iwl_mvm_free_coredump(const void *data)
 718 {
 719         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 720
 721         vfree(fw_error_dump->op_mode_ptr);
 722         vfree(fw_error_dump->trans_ptr);
 723         kfree(fw_error_dump);
 724 }
 725
 726 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 727 {
 728         struct iwl_fw_error_dump_file *dump_file;
 729         struct iwl_fw_error_dump_data *dump_data;
 730         struct iwl_fw_error_dump_info *dump_info;
 731         struct iwl_mvm_dump_ptrs *fw_error_dump;
 732         const struct fw_img *img;
 733         u32 sram_len, sram_ofs;
 734         u32 file_len, rxf_len;
 735         unsigned long flags;
 736         int reg_val;
 737
 738         lockdep_assert_held(&mvm->mutex);
 739
 740         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 741         if (!fw_error_dump)
 742                 return;
 743
 744         img = &mvm->fw->img[mvm->cur_ucode];
 745         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 746         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 747
 748         /* reading buffer size */
 749         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 750         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 751
 752         /* the register holds the value divided by 128 */
 753         rxf_len = rxf_len << 7;
 754
 755         file_len = sizeof(*dump_file) +
 756                    sizeof(*dump_data) * 3 +
 757                    sram_len +
 758                    rxf_len +
 759                    sizeof(*dump_info);
 760
 761         dump_file = vzalloc(file_len);
 762         if (!dump_file) {
 763                 kfree(fw_error_dump);
 764                 return;
 765         }
 766
 767         fw_error_dump->op_mode_ptr = dump_file;
 768
 769         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 770         dump_data = (void *)dump_file->data;
 771
 772         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 773         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 774         dump_info = (void *) dump_data->data;
 775         dump_info->device_family =
 776                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 777                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 778                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 779         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 780                sizeof(dump_info->fw_human_readable));
 781         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 782                 sizeof(dump_info->dev_human_readable));
 783         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 784                 sizeof(dump_info->bus_human_readable));
 785
 786         dump_data = iwl_fw_error_next_data(dump_data);
 787         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 788         dump_data->len = cpu_to_le32(rxf_len);
 789
 790         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 791                 u32 *rxf = (void *)dump_data->data;
 792                 int i;
 793
 794                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 795                         iwl_trans_write_prph(mvm->trans,
 796                                              RXF_LD_FENCE_OFFSET_ADDR,
 797                                              i * sizeof(u32));
 798                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 799                                                      RXF_FIFO_RD_FENCE_ADDR);
 800                 }
 801                 iwl_trans_release_nic_access(mvm->trans, &flags);
 802         }
 803
 804         dump_data = iwl_fw_error_next_data(dump_data);
 805         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 806         dump_data->len = cpu_to_le32(sram_len);
 807         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 808                                  sram_len);
 809
 810         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 811         fw_error_dump->op_mode_len = file_len;
 812         if (fw_error_dump->trans_ptr)
 813                 file_len += fw_error_dump->trans_ptr->len;
 814         dump_file->file_len = cpu_to_le32(file_len);
 815
 816         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 817                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 818 }
 819
 820 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 821 {
 822         iwl_mvm_fw_error_dump(mvm);
 823
 824         iwl_trans_stop_device(mvm->trans);
 825
 826         mvm->scan_status = IWL_MVM_SCAN_NONE;
 827         mvm->ps_disabled = false;
 828
 829         /* just in case one was running */
 830         ieee80211_remain_on_channel_expired(mvm->hw);
 831
 832         ieee80211_iterate_active_interfaces_atomic(
 833                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 834                 iwl_mvm_cleanup_iterator, mvm);
 835
 836         mvm->p2p_device_vif = NULL;
 837         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 838
 839         iwl_mvm_reset_phy_ctxts(mvm);
 840         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 841         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 842         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 843         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 844         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 845         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 846         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 847         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 848
 849         ieee80211_wake_queues(mvm->hw);
 850
 851         /* cleanup all stale references (scan, roc), but keep the
 852          * ucode_down ref until reconfig is complete */
 853         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 854
 855         /* clear any stale d0i3 state */
 856         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 857
 858         mvm->vif_count = 0;
 859         mvm->rx_ba_sessions = 0;
 860 }
 861
 862 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 863 {
 864         int ret;
 865
 866         lockdep_assert_held(&mvm->mutex);
 867
 868         /* Clean up some internal and mac80211 state on restart */
 869         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 870                 iwl_mvm_restart_cleanup(mvm);
 871
 872         ret = iwl_mvm_up(mvm);
 873
 874         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 875                 /* Something went wrong - we need to finish some cleanup
 876                  * that normally iwl_mvm_mac_restart_complete() below
 877                  * would do.
 878                  */
 879                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 880                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 881         }
 882
 883         return ret;
 884 }
 885
 886 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 887 {
 888         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 889         int ret;
 890
 891         mutex_lock(&mvm->mutex);
 892         ret = __iwl_mvm_mac_start(mvm);
 893         mutex_unlock(&mvm->mutex);
 894
 895         return ret;
 896 }
 897
 898 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 899 {
 900         int ret;
 901
 902         mutex_lock(&mvm->mutex);
 903
 904         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 905         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 906         ret = iwl_mvm_update_quotas(mvm, NULL);
 907         if (ret)
 908                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 909                         ret);
 910
 911         /* allow transport/FW low power modes */
 912         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 913
 914         mutex_unlock(&mvm->mutex);
 915 }
 916
 917 static void
 918 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 919                               enum ieee80211_reconfig_type reconfig_type)
 920 {
 921         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 922
 923         switch (reconfig_type) {
 924         case IEEE80211_RECONFIG_TYPE_RESTART:
 925                 iwl_mvm_restart_complete(mvm);
 926                 break;
 927         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 928                 break;
 929         }
 930 }
 931
 932 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 933 {
 934         lockdep_assert_held(&mvm->mutex);
 935
 936         /* disallow low power states when the FW is down */
 937         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 938
 939         /* async_handlers_wk is now blocked */
 940
 941         /*
 942          * The work item could be running or queued if the
 943          * ROC time event stops just as we get here.
 944          */
 945         cancel_work_sync(&mvm->roc_done_wk);
 946
 947         iwl_trans_stop_device(mvm->trans);
 948
 949         iwl_mvm_async_handlers_purge(mvm);
 950         /* async_handlers_list is empty and will stay empty: HW is stopped */
 951
 952         /* the fw is stopped, the aux sta is dead: clean up driver state */
 953         iwl_mvm_del_aux_sta(mvm);
 954
 955         mvm->ucode_loaded = false;
 956 }
 957
 958 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 959 {
 960         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 961
 962         flush_work(&mvm->d0i3_exit_work);
 963         flush_work(&mvm->async_handlers_wk);
 964         flush_work(&mvm->fw_error_dump_wk);
 965
 966         mutex_lock(&mvm->mutex);
 967         __iwl_mvm_mac_stop(mvm);
 968         mutex_unlock(&mvm->mutex);
 969
 970         /*
 971          * The worker might have been waiting for the mutex, let it run and
 972          * discover that its list is now empty.
 973          */
 974         cancel_work_sync(&mvm->async_handlers_wk);
 975 }
 976
 977 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 978 {
 979         u16 i;
 980
 981         lockdep_assert_held(&mvm->mutex);
 982
 983         for (i = 0; i < NUM_PHY_CTX; i++)
 984                 if (!mvm->phy_ctxts[i].ref)
 985                         return &mvm->phy_ctxts[i];
 986
 987         IWL_ERR(mvm, "No available PHY context\n");
 988         return NULL;
 989 }
 990
 991 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 992                                 s8 tx_power)
 993 {
 994         /* FW is in charge of regulatory enforcement */
 995         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 996                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 997                 .pwr_restriction = cpu_to_le16(tx_power),
 998         };
 999
1000         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1001                                     sizeof(reduce_txpwr_cmd),
1002                                     &reduce_txpwr_cmd);
1003 }
1004
1005 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1006                                      struct ieee80211_vif *vif)
1007 {
1008         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1009         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1010         int ret;
1011
1012         /*
1013          * make sure D0i3 exit is completed, otherwise a target access
1014          * during tx queue configuration could be done when still in
1015          * D0i3 state.
1016          */
1017         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1018         if (ret)
1019                 return ret;
1020
1021         /*
1022          * Not much to do here. The stack will not allow interface
1023          * types or combinations that we didn't advertise, so we
1024          * don't really have to check the types.
1025          */
1026
1027         mutex_lock(&mvm->mutex);
1028
1029         /* Allocate resources for the MAC context, and add it to the fw  */
1030         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1031         if (ret)
1032                 goto out_unlock;
1033
1034         /* Counting number of interfaces is needed for legacy PM */
1035         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1036                 mvm->vif_count++;
1037
1038         /*
1039          * The AP binding flow can be done only after the beacon
1040          * template is configured (which happens only in the mac80211
1041          * start_ap() flow), and adding the broadcast station can happen
1042          * only after the binding.
1043          * In addition, since modifying the MAC before adding a bcast
1044          * station is not allowed by the FW, delay the adding of MAC context to
1045          * the point where we can also add the bcast station.
1046          * In short: there's not much we can do at this point, other than
1047          * allocating resources :)
1048          */
1049         if (vif->type == NL80211_IFTYPE_AP ||
1050             vif->type == NL80211_IFTYPE_ADHOC) {
1051                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1052                 if (ret) {
1053                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1054                         goto out_release;
1055                 }
1056
1057                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1058                 goto out_unlock;
1059         }
1060
1061         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1062         if (ret)
1063                 goto out_release;
1064
1065         ret = iwl_mvm_power_update_mac(mvm);
1066         if (ret)
1067                 goto out_release;
1068
1069         /* beacon filtering */
1070         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1071         if (ret)
1072                 goto out_remove_mac;
1073
1074         if (!mvm->bf_allowed_vif &&
1075             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1076                 mvm->bf_allowed_vif = mvmvif;
1077                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1078                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1079         }
1080
1081         /*
1082          * P2P_DEVICE interface does not have a channel context assigned to it,
1083          * so a dedicated PHY context is allocated to it and the corresponding
1084          * MAC context is bound to it at this stage.
1085          */
1086         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1087
1088                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1089                 if (!mvmvif->phy_ctxt) {
1090                         ret = -ENOSPC;
1091                         goto out_free_bf;
1092                 }
1093
1094                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1095                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1096                 if (ret)
1097                         goto out_unref_phy;
1098
1099                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1100                 if (ret)
1101                         goto out_unbind;
1102
1103                 /* Save a pointer to p2p device vif, so it can later be used to
1104                  * update the p2p device MAC when a GO is started/stopped */
1105                 mvm->p2p_device_vif = vif;
1106         }
1107
1108         iwl_mvm_vif_dbgfs_register(mvm, vif);
1109         goto out_unlock;
1110
1111  out_unbind:
1112         iwl_mvm_binding_remove_vif(mvm, vif);
1113  out_unref_phy:
1114         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1115  out_free_bf:
1116         if (mvm->bf_allowed_vif == mvmvif) {
1117                 mvm->bf_allowed_vif = NULL;
1118                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1119                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1120         }
1121  out_remove_mac:
1122         mvmvif->phy_ctxt = NULL;
1123         iwl_mvm_mac_ctxt_remove(mvm, vif);
1124  out_release:
1125         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1126                 mvm->vif_count--;
1127
1128         iwl_mvm_mac_ctxt_release(mvm, vif);
1129  out_unlock:
1130         mutex_unlock(&mvm->mutex);
1131
1132         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1133
1134         return ret;
1135 }
1136
1137 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1138                                         struct ieee80211_vif *vif)
1139 {
1140         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1141
1142         if (tfd_msk) {
1143                 mutex_lock(&mvm->mutex);
1144                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1145                 mutex_unlock(&mvm->mutex);
1146         }
1147
1148         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1149                 /*
1150                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1151                  * We assume here that all the packets sent to the OFFCHANNEL
1152                  * queue are sent in ROC session.
1153                  */
1154                 flush_work(&mvm->roc_done_wk);
1155         } else {
1156                 /*
1157                  * By now, all the AC queues are empty. The AGG queues are
1158                  * empty too. We already got all the Tx responses for all the
1159                  * packets in the queues. The drain work can have been
1160                  * triggered. Flush it.
1161                  */
1162                 flush_work(&mvm->sta_drained_wk);
1163         }
1164 }
1165
1166 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1167                                          struct ieee80211_vif *vif)
1168 {
1169         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1170         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1171
1172         iwl_mvm_prepare_mac_removal(mvm, vif);
1173
1174         mutex_lock(&mvm->mutex);
1175
1176         if (mvm->bf_allowed_vif == mvmvif) {
1177                 mvm->bf_allowed_vif = NULL;
1178                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1179                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1180         }
1181
1182         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1183
1184         /*
1185          * For AP/GO interface, the tear down of the resources allocated to the
1186          * interface is be handled as part of the stop_ap flow.
1187          */
1188         if (vif->type == NL80211_IFTYPE_AP ||
1189             vif->type == NL80211_IFTYPE_ADHOC) {
1190 #ifdef CONFIG_NL80211_TESTMODE
1191                 if (vif == mvm->noa_vif) {
1192                         mvm->noa_vif = NULL;
1193                         mvm->noa_duration = 0;
1194                 }
1195 #endif
1196                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1197                 goto out_release;
1198         }
1199
1200         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1201                 mvm->p2p_device_vif = NULL;
1202                 iwl_mvm_rm_bcast_sta(mvm, vif);
1203                 iwl_mvm_binding_remove_vif(mvm, vif);
1204                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1205                 mvmvif->phy_ctxt = NULL;
1206         }
1207
1208         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1209                 mvm->vif_count--;
1210
1211         iwl_mvm_power_update_mac(mvm);
1212         iwl_mvm_mac_ctxt_remove(mvm, vif);
1213
1214 out_release:
1215         iwl_mvm_mac_ctxt_release(mvm, vif);
1216         mutex_unlock(&mvm->mutex);
1217 }
1218
1219 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1220 {
1221         return 0;
1222 }
1223
1224 struct iwl_mvm_mc_iter_data {
1225         struct iwl_mvm *mvm;
1226         int port_id;
1227 };
1228
1229 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1230                                       struct ieee80211_vif *vif)
1231 {
1232         struct iwl_mvm_mc_iter_data *data = _data;
1233         struct iwl_mvm *mvm = data->mvm;
1234         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1235         int ret, len;
1236
1237         /* if we don't have free ports, mcast frames will be dropped */
1238         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1239                 return;
1240
1241         if (vif->type != NL80211_IFTYPE_STATION ||
1242             !vif->bss_conf.assoc)
1243                 return;
1244
1245         cmd->port_id = data->port_id++;
1246         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1247         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1248
1249         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1250         if (ret)
1251                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1252 }
1253
1254 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1255 {
1256         struct iwl_mvm_mc_iter_data iter_data = {
1257                 .mvm = mvm,
1258         };
1259
1260         lockdep_assert_held(&mvm->mutex);
1261
1262         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1263                 return;
1264
1265         ieee80211_iterate_active_interfaces_atomic(
1266                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1267                 iwl_mvm_mc_iface_iterator, &iter_data);
1268 }
1269
1270 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1271                                      struct netdev_hw_addr_list *mc_list)
1272 {
1273         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1274         struct iwl_mcast_filter_cmd *cmd;
1275         struct netdev_hw_addr *addr;
1276         int addr_count;
1277         bool pass_all;
1278         int len;
1279
1280         addr_count = netdev_hw_addr_list_count(mc_list);
1281         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1282                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1283         if (pass_all)
1284                 addr_count = 0;
1285
1286         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1287         cmd = kzalloc(len, GFP_ATOMIC);
1288         if (!cmd)
1289                 return 0;
1290
1291         if (pass_all) {
1292                 cmd->pass_all = 1;
1293                 return (u64)(unsigned long)cmd;
1294         }
1295
1296         netdev_hw_addr_list_for_each(addr, mc_list) {
1297                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1298                                    cmd->count, addr->addr);
1299                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1300                        addr->addr, ETH_ALEN);
1301                 cmd->count++;
1302         }
1303
1304         return (u64)(unsigned long)cmd;
1305 }
1306
1307 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1308                                      unsigned int changed_flags,
1309                                      unsigned int *total_flags,
1310                                      u64 multicast)
1311 {
1312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1313         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1314
1315         mutex_lock(&mvm->mutex);
1316
1317         /* replace previous configuration */
1318         kfree(mvm->mcast_filter_cmd);
1319         mvm->mcast_filter_cmd = cmd;
1320
1321         if (!cmd)
1322                 goto out;
1323
1324         iwl_mvm_recalc_multicast(mvm);
1325 out:
1326         mutex_unlock(&mvm->mutex);
1327         *total_flags = 0;
1328 }
1329
1330 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1331 struct iwl_bcast_iter_data {
1332         struct iwl_mvm *mvm;
1333         struct iwl_bcast_filter_cmd *cmd;
1334         u8 current_filter;
1335 };
1336
1337 static void
1338 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1339                          const struct iwl_fw_bcast_filter *in_filter,
1340                          struct iwl_fw_bcast_filter *out_filter)
1341 {
1342         struct iwl_fw_bcast_filter_attr *attr;
1343         int i;
1344
1345         memcpy(out_filter, in_filter, sizeof(*out_filter));
1346
1347         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1348                 attr = &out_filter->attrs[i];
1349
1350                 if (!attr->mask)
1351                         break;
1352
1353                 switch (attr->reserved1) {
1354                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1355                         if (vif->bss_conf.arp_addr_cnt != 1) {
1356                                 attr->mask = 0;
1357                                 continue;
1358                         }
1359
1360                         attr->val = vif->bss_conf.arp_addr_list[0];
1361                         break;
1362                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1363                         attr->val = *(__be32 *)&vif->addr[2];
1364                         break;
1365                 default:
1366                         break;
1367                 }
1368                 attr->reserved1 = 0;
1369                 out_filter->num_attrs++;
1370         }
1371 }
1372
1373 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1374                                           struct ieee80211_vif *vif)
1375 {
1376         struct iwl_bcast_iter_data *data = _data;
1377         struct iwl_mvm *mvm = data->mvm;
1378         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1379         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1380         struct iwl_fw_bcast_mac *bcast_mac;
1381         int i;
1382
1383         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1384                 return;
1385
1386         bcast_mac = &cmd->macs[mvmvif->id];
1387
1388         /*
1389          * enable filtering only for associated stations, but not for P2P
1390          * Clients
1391          */
1392         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1393             !vif->bss_conf.assoc)
1394                 return;
1395
1396         bcast_mac->default_discard = 1;
1397
1398         /* copy all configured filters */
1399         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1400                 /*
1401                  * Make sure we don't exceed our filters limit.
1402                  * if there is still a valid filter to be configured,
1403                  * be on the safe side and just allow bcast for this mac.
1404                  */
1405                 if (WARN_ON_ONCE(data->current_filter >=
1406                                  ARRAY_SIZE(cmd->filters))) {
1407                         bcast_mac->default_discard = 0;
1408                         bcast_mac->attached_filters = 0;
1409                         break;
1410                 }
1411
1412                 iwl_mvm_set_bcast_filter(vif,
1413                                          &mvm->bcast_filters[i],
1414                                          &cmd->filters[data->current_filter]);
1415
1416                 /* skip current filter if it contains no attributes */
1417                 if (!cmd->filters[data->current_filter].num_attrs)
1418                         continue;
1419
1420                 /* attach the filter to current mac */
1421                 bcast_mac->attached_filters |=
1422                                 cpu_to_le16(BIT(data->current_filter));
1423
1424                 data->current_filter++;
1425         }
1426 }
1427
1428 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1429                                     struct iwl_bcast_filter_cmd *cmd)
1430 {
1431         struct iwl_bcast_iter_data iter_data = {
1432                 .mvm = mvm,
1433                 .cmd = cmd,
1434         };
1435
1436         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1437                 return false;
1438
1439         memset(cmd, 0, sizeof(*cmd));
1440         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1441         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1442
1443 #ifdef CONFIG_IWLWIFI_DEBUGFS
1444         /* use debugfs filters/macs if override is configured */
1445         if (mvm->dbgfs_bcast_filtering.override) {
1446                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1447                        sizeof(cmd->filters));
1448                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1449                        sizeof(cmd->macs));
1450                 return true;
1451         }
1452 #endif
1453
1454         /* if no filters are configured, do nothing */
1455         if (!mvm->bcast_filters)
1456                 return false;
1457
1458         /* configure and attach these filters for each associated sta vif */
1459         ieee80211_iterate_active_interfaces(
1460                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1461                 iwl_mvm_bcast_filter_iterator, &iter_data);
1462
1463         return true;
1464 }
1465 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1466                                           struct ieee80211_vif *vif)
1467 {
1468         struct iwl_bcast_filter_cmd cmd;
1469
1470         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1471                 return 0;
1472
1473         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1474                 return 0;
1475
1476         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1477                                     sizeof(cmd), &cmd);
1478 }
1479 #else
1480 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1481                                                  struct ieee80211_vif *vif)
1482 {
1483         return 0;
1484 }
1485 #endif
1486
1487 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1488                                              struct ieee80211_vif *vif,
1489                                              struct ieee80211_bss_conf *bss_conf,
1490                                              u32 changes)
1491 {
1492         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1493         int ret;
1494
1495         /*
1496          * Re-calculate the tsf id, as the master-slave relations depend on the
1497          * beacon interval, which was not known when the station interface was
1498          * added.
1499          */
1500         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1501                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1502
1503         /*
1504          * If we're not associated yet, take the (new) BSSID before associating
1505          * so the firmware knows. If we're already associated, then use the old
1506          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1507          * branch for disassociation below.
1508          */
1509         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1510                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1511
1512         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1513         if (ret)
1514                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1515
1516         /* after sending it once, adopt mac80211 data */
1517         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1518         mvmvif->associated = bss_conf->assoc;
1519
1520         if (changes & BSS_CHANGED_ASSOC) {
1521                 if (bss_conf->assoc) {
1522                         /* add quota for this interface */
1523                         ret = iwl_mvm_update_quotas(mvm, NULL);
1524                         if (ret) {
1525                                 IWL_ERR(mvm, "failed to update quotas\n");
1526                                 return;
1527                         }
1528
1529                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1530                                      &mvm->status)) {
1531                                 /*
1532                                  * If we're restarting then the firmware will
1533                                  * obviously have lost synchronisation with
1534                                  * the AP. It will attempt to synchronise by
1535                                  * itself, but we can make it more reliable by
1536                                  * scheduling a session protection time event.
1537                                  *
1538                                  * The firmware needs to receive a beacon to
1539                                  * catch up with synchronisation, use 110% of
1540                                  * the beacon interval.
1541                                  *
1542                                  * Set a large maximum delay to allow for more
1543                                  * than a single interface.
1544                                  */
1545                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1546                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1547                                                         5 * dur, false);
1548                         }
1549
1550                         iwl_mvm_sf_update(mvm, vif, false);
1551                         iwl_mvm_power_vif_assoc(mvm, vif);
1552                         if (vif->p2p) {
1553                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1554                                 iwl_mvm_update_smps(mvm, vif,
1555                                                     IWL_MVM_SMPS_REQ_PROT,
1556                                                     IEEE80211_SMPS_DYNAMIC);
1557                         }
1558                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1559                         /*
1560                          * If update fails - SF might be running in associated
1561                          * mode while disassociated - which is forbidden.
1562                          */
1563                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1564                                   "Failed to update SF upon disassociation\n");
1565
1566                         /* remove AP station now that the MAC is unassoc */
1567                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1568                         if (ret)
1569                                 IWL_ERR(mvm, "failed to remove AP station\n");
1570
1571                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1572                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1573                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1574                         /* remove quota for this interface */
1575                         ret = iwl_mvm_update_quotas(mvm, NULL);
1576                         if (ret)
1577                                 IWL_ERR(mvm, "failed to update quotas\n");
1578
1579                         if (vif->p2p)
1580                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1581
1582                         /* this will take the cleared BSSID from bss_conf */
1583                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1584                         if (ret)
1585                                 IWL_ERR(mvm,
1586                                         "failed to update MAC %pM (clear after unassoc)\n",
1587                                         vif->addr);
1588                 }
1589
1590                 iwl_mvm_recalc_multicast(mvm);
1591                 iwl_mvm_configure_bcast_filter(mvm, vif);
1592
1593                 /* reset rssi values */
1594                 mvmvif->bf_data.ave_beacon_signal = 0;
1595
1596                 iwl_mvm_bt_coex_vif_change(mvm);
1597                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1598                                     IEEE80211_SMPS_AUTOMATIC);
1599         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1600                 /*
1601                  * We received a beacon _after_ association so
1602                  * remove the session protection.
1603                  */
1604                 iwl_mvm_remove_time_event(mvm, mvmvif,
1605                                           &mvmvif->time_event_data);
1606         }
1607
1608         if (changes & BSS_CHANGED_BEACON_INFO) {
1609                 iwl_mvm_sf_update(mvm, vif, false);
1610                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1611         }
1612
1613         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1614                 ret = iwl_mvm_power_update_mac(mvm);
1615                 if (ret)
1616                         IWL_ERR(mvm, "failed to update power mode\n");
1617         }
1618
1619         if (changes & BSS_CHANGED_TXPOWER) {
1620                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1621                                 bss_conf->txpower);
1622                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1623         }
1624
1625         if (changes & BSS_CHANGED_CQM) {
1626                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1627                 /* reset cqm events tracking */
1628                 mvmvif->bf_data.last_cqm_event = 0;
1629                 if (mvmvif->bf_data.bf_enabled) {
1630                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1631                         if (ret)
1632                                 IWL_ERR(mvm,
1633                                         "failed to update CQM thresholds\n");
1634                 }
1635         }
1636
1637         if (changes & BSS_CHANGED_ARP_FILTER) {
1638                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1639                 iwl_mvm_configure_bcast_filter(mvm, vif);
1640         }
1641 }
1642
1643 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1644                                  struct ieee80211_vif *vif)
1645 {
1646         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1647         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1648         int ret;
1649
1650         /*
1651          * iwl_mvm_mac_ctxt_add() might read directly from the device
1652          * (the system time), so make sure it is available.
1653          */
1654         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1655         if (ret)
1656                 return ret;
1657
1658         mutex_lock(&mvm->mutex);
1659
1660         /* Send the beacon template */
1661         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1662         if (ret)
1663                 goto out_unlock;
1664
1665         /*
1666          * Re-calculate the tsf id, as the master-slave relations depend on the
1667          * beacon interval, which was not known when the AP interface was added.
1668          */
1669         if (vif->type == NL80211_IFTYPE_AP)
1670                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1671
1672         /* Add the mac context */
1673         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1674         if (ret)
1675                 goto out_unlock;
1676
1677         /* Perform the binding */
1678         ret = iwl_mvm_binding_add_vif(mvm, vif);
1679         if (ret)
1680                 goto out_remove;
1681
1682         /* Send the bcast station. At this stage the TBTT and DTIM time events
1683          * are added and applied to the scheduler */
1684         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1685         if (ret)
1686                 goto out_unbind;
1687
1688         /* must be set before quota calculations */
1689         mvmvif->ap_ibss_active = true;
1690
1691         /* power updated needs to be done before quotas */
1692         iwl_mvm_power_update_mac(mvm);
1693
1694         ret = iwl_mvm_update_quotas(mvm, NULL);
1695         if (ret)
1696                 goto out_quota_failed;
1697
1698         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1699         if (vif->p2p && mvm->p2p_device_vif)
1700                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1701
1702         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1703
1704         iwl_mvm_bt_coex_vif_change(mvm);
1705
1706         /* we don't support TDLS during DCM */
1707         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1708                 iwl_mvm_teardown_tdls_peers(mvm);
1709
1710         mutex_unlock(&mvm->mutex);
1711         return 0;
1712
1713 out_quota_failed:
1714         iwl_mvm_power_update_mac(mvm);
1715         mvmvif->ap_ibss_active = false;
1716         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1717 out_unbind:
1718         iwl_mvm_binding_remove_vif(mvm, vif);
1719 out_remove:
1720         iwl_mvm_mac_ctxt_remove(mvm, vif);
1721 out_unlock:
1722         mutex_unlock(&mvm->mutex);
1723         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1724         return ret;
1725 }
1726
1727 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1728                                  struct ieee80211_vif *vif)
1729 {
1730         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1731         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1732
1733         iwl_mvm_prepare_mac_removal(mvm, vif);
1734
1735         mutex_lock(&mvm->mutex);
1736
1737         /* Handle AP stop while in CSA */
1738         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1739                 iwl_mvm_remove_time_event(mvm, mvmvif,
1740                                           &mvmvif->time_event_data);
1741                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1742         }
1743
1744         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1745                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1746                 mvm->csa_tx_block_bcn_timeout = 0;
1747         }
1748
1749         mvmvif->ap_ibss_active = false;
1750         mvm->ap_last_beacon_gp2 = 0;
1751
1752         iwl_mvm_bt_coex_vif_change(mvm);
1753
1754         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1755
1756         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1757         if (vif->p2p && mvm->p2p_device_vif)
1758                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1759
1760         iwl_mvm_update_quotas(mvm, NULL);
1761         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1762         iwl_mvm_binding_remove_vif(mvm, vif);
1763
1764         iwl_mvm_power_update_mac(mvm);
1765
1766         iwl_mvm_mac_ctxt_remove(mvm, vif);
1767
1768         mutex_unlock(&mvm->mutex);
1769 }
1770
1771 static void
1772 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1773                                  struct ieee80211_vif *vif,
1774                                  struct ieee80211_bss_conf *bss_conf,
1775                                  u32 changes)
1776 {
1777         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1778
1779         /* Changes will be applied when the AP/IBSS is started */
1780         if (!mvmvif->ap_ibss_active)
1781                 return;
1782
1783         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1784                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1785             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1786                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1787
1788         /* Need to send a new beacon template to the FW */
1789         if (changes & BSS_CHANGED_BEACON &&
1790             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1791                 IWL_WARN(mvm, "Failed updating beacon data\n");
1792
1793         if (changes & BSS_CHANGED_TXPOWER) {
1794                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1795                                 bss_conf->txpower);
1796                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1797         }
1798
1799 }
1800
1801 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1802                                      struct ieee80211_vif *vif,
1803                                      struct ieee80211_bss_conf *bss_conf,
1804                                      u32 changes)
1805 {
1806         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1807
1808         /*
1809          * iwl_mvm_bss_info_changed_station() might call
1810          * iwl_mvm_protect_session(), which reads directly from
1811          * the device (the system time), so make sure it is available.
1812          */
1813         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1814                 return;
1815
1816         mutex_lock(&mvm->mutex);
1817
1818         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1819                 iwl_mvm_scan_offload_stop(mvm, true);
1820
1821         switch (vif->type) {
1822         case NL80211_IFTYPE_STATION:
1823                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1824                 break;
1825         case NL80211_IFTYPE_AP:
1826         case NL80211_IFTYPE_ADHOC:
1827                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1828                 break;
1829         default:
1830                 /* shouldn't happen */
1831                 WARN_ON_ONCE(1);
1832         }
1833
1834         mutex_unlock(&mvm->mutex);
1835         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1836 }
1837
1838 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1839                                           enum iwl_scan_status scan_type)
1840 {
1841         int ret;
1842         bool wait_for_handlers = false;
1843
1844         mutex_lock(&mvm->mutex);
1845
1846         if (mvm->scan_status != scan_type) {
1847                 ret = 0;
1848                 /* make sure there are no pending notifications */
1849                 wait_for_handlers = true;
1850                 goto out;
1851         }
1852
1853         switch (scan_type) {
1854         case IWL_MVM_SCAN_SCHED:
1855                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1856                 break;
1857         case IWL_MVM_SCAN_OS:
1858                 ret = iwl_mvm_cancel_scan(mvm);
1859                 break;
1860         case IWL_MVM_SCAN_NONE:
1861         default:
1862                 WARN_ON_ONCE(1);
1863                 ret = -EINVAL;
1864                 break;
1865         }
1866         if (ret)
1867                 goto out;
1868
1869         wait_for_handlers = true;
1870 out:
1871         mutex_unlock(&mvm->mutex);
1872
1873         /* make sure we consume the completion notification */
1874         if (wait_for_handlers)
1875                 iwl_mvm_wait_for_async_handlers(mvm);
1876
1877         return ret;
1878 }
1879 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1880                                struct ieee80211_vif *vif,
1881                                struct ieee80211_scan_request *hw_req)
1882 {
1883         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1884         struct cfg80211_scan_request *req = &hw_req->req;
1885         int ret;
1886
1887         if (req->n_channels == 0 ||
1888             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1889                 return -EINVAL;
1890
1891         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1892         if (ret)
1893                 return ret;
1894
1895         mutex_lock(&mvm->mutex);
1896
1897         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1898                 ret = -EBUSY;
1899                 goto out;
1900         }
1901
1902         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1903
1904         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1905                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1906         else
1907                 ret = iwl_mvm_scan_request(mvm, vif, req);
1908
1909         if (ret)
1910                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1911 out:
1912         mutex_unlock(&mvm->mutex);
1913         return ret;
1914 }
1915
1916 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1917                                        struct ieee80211_vif *vif)
1918 {
1919         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1920
1921         mutex_lock(&mvm->mutex);
1922
1923         iwl_mvm_cancel_scan(mvm);
1924
1925         mutex_unlock(&mvm->mutex);
1926 }
1927
1928 static void
1929 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1930                                   struct ieee80211_sta *sta, u16 tids,
1931                                   int num_frames,
1932                                   enum ieee80211_frame_release_type reason,
1933                                   bool more_data)
1934 {
1935         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1936
1937         /* Called when we need to transmit (a) frame(s) from mac80211 */
1938
1939         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1940                                           tids, more_data, false);
1941 }
1942
1943 static void
1944 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1945                                     struct ieee80211_sta *sta, u16 tids,
1946                                     int num_frames,
1947                                     enum ieee80211_frame_release_type reason,
1948                                     bool more_data)
1949 {
1950         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1951
1952         /* Called when we need to transmit (a) frame(s) from agg queue */
1953
1954         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1955                                           tids, more_data, true);
1956 }
1957
1958 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1959                                    struct ieee80211_vif *vif,
1960                                    enum sta_notify_cmd cmd,
1961                                    struct ieee80211_sta *sta)
1962 {
1963         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1964         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1965         int tid;
1966
1967         switch (cmd) {
1968         case STA_NOTIFY_SLEEP:
1969                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1970                         ieee80211_sta_block_awake(hw, sta, true);
1971                 spin_lock_bh(&mvmsta->lock);
1972                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1973                         struct iwl_mvm_tid_data *tid_data;
1974
1975                         tid_data = &mvmsta->tid_data[tid];
1976                         if (tid_data->state != IWL_AGG_ON &&
1977                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1978                                 continue;
1979                         if (iwl_mvm_tid_queued(tid_data) == 0)
1980                                 continue;
1981                         ieee80211_sta_set_buffered(sta, tid, true);
1982                 }
1983                 spin_unlock_bh(&mvmsta->lock);
1984                 /*
1985                  * The fw updates the STA to be asleep. Tx packets on the Tx
1986                  * queues to this station will not be transmitted. The fw will
1987                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1988                  */
1989                 break;
1990         case STA_NOTIFY_AWAKE:
1991                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1992                         break;
1993                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1994                 break;
1995         default:
1996                 break;
1997         }
1998 }
1999
2000 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2001                                        struct ieee80211_vif *vif,
2002                                        struct ieee80211_sta *sta)
2003 {
2004         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2005         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2006
2007         /*
2008          * This is called before mac80211 does RCU synchronisation,
2009          * so here we already invalidate our internal RCU-protected
2010          * station pointer. The rest of the code will thus no longer
2011          * be able to find the station this way, and we don't rely
2012          * on further RCU synchronisation after the sta_state()
2013          * callback deleted the station.
2014          */
2015         mutex_lock(&mvm->mutex);
2016         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2017                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2018                                    ERR_PTR(-ENOENT));
2019         mutex_unlock(&mvm->mutex);
2020 }
2021
2022 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2023                                  struct ieee80211_vif *vif,
2024                                  struct ieee80211_sta *sta,
2025                                  enum ieee80211_sta_state old_state,
2026                                  enum ieee80211_sta_state new_state)
2027 {
2028         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2029         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2030         int ret;
2031
2032         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2033                            sta->addr, old_state, new_state);
2034
2035         /* this would be a mac80211 bug ... but don't crash */
2036         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2037                 return -EINVAL;
2038
2039         /* if a STA is being removed, reuse its ID */
2040         flush_work(&mvm->sta_drained_wk);
2041
2042         mutex_lock(&mvm->mutex);
2043         if (old_state == IEEE80211_STA_NOTEXIST &&
2044             new_state == IEEE80211_STA_NONE) {
2045                 /*
2046                  * Firmware bug - it'll crash if the beacon interval is less
2047                  * than 16. We can't avoid connecting at all, so refuse the
2048                  * station state change, this will cause mac80211 to abandon
2049                  * attempts to connect to this AP, and eventually wpa_s will
2050                  * blacklist the AP...
2051                  */
2052                 if (vif->type == NL80211_IFTYPE_STATION &&
2053                     vif->bss_conf.beacon_int < 16) {
2054                         IWL_ERR(mvm,
2055                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2056                                 sta->addr, vif->bss_conf.beacon_int);
2057                         ret = -EINVAL;
2058                         goto out_unlock;
2059                 }
2060
2061                 if (sta->tdls &&
2062                     (vif->p2p ||
2063                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2064                                                 IWL_MVM_TDLS_STA_COUNT ||
2065                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2066                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2067                         ret = -EBUSY;
2068                         goto out_unlock;
2069                 }
2070
2071                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2072                 if (sta->tdls && ret == 0)
2073                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2074         } else if (old_state == IEEE80211_STA_NONE &&
2075                    new_state == IEEE80211_STA_AUTH) {
2076                 /*
2077                  * EBS may be disabled due to previous failures reported by FW.
2078                  * Reset EBS status here assuming environment has been changed.
2079                  */
2080                 mvm->last_ebs_successful = true;
2081                 ret = 0;
2082         } else if (old_state == IEEE80211_STA_AUTH &&
2083                    new_state == IEEE80211_STA_ASSOC) {
2084                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2085                 if (ret == 0)
2086                         iwl_mvm_rs_rate_init(mvm, sta,
2087                                              mvmvif->phy_ctxt->channel->band,
2088                                              true);
2089         } else if (old_state == IEEE80211_STA_ASSOC &&
2090                    new_state == IEEE80211_STA_AUTHORIZED) {
2091
2092                 /* we don't support TDLS during DCM */
2093                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2094                         iwl_mvm_teardown_tdls_peers(mvm);
2095
2096                 /* enable beacon filtering */
2097                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2098                 ret = 0;
2099         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2100                    new_state == IEEE80211_STA_ASSOC) {
2101                 /* disable beacon filtering */
2102                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2103                 ret = 0;
2104         } else if (old_state == IEEE80211_STA_ASSOC &&
2105                    new_state == IEEE80211_STA_AUTH) {
2106                 ret = 0;
2107         } else if (old_state == IEEE80211_STA_AUTH &&
2108                    new_state == IEEE80211_STA_NONE) {
2109                 ret = 0;
2110         } else if (old_state == IEEE80211_STA_NONE &&
2111                    new_state == IEEE80211_STA_NOTEXIST) {
2112                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2113                 if (sta->tdls)
2114                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2115         } else {
2116                 ret = -EIO;
2117         }
2118  out_unlock:
2119         mutex_unlock(&mvm->mutex);
2120
2121         return ret;
2122 }
2123
2124 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2125 {
2126         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2127
2128         mvm->rts_threshold = value;
2129
2130         return 0;
2131 }
2132
2133 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2134                                   struct ieee80211_vif *vif,
2135                                   struct ieee80211_sta *sta, u32 changed)
2136 {
2137         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2138
2139         if (vif->type == NL80211_IFTYPE_STATION &&
2140             changed & IEEE80211_RC_NSS_CHANGED)
2141                 iwl_mvm_sf_update(mvm, vif, false);
2142 }
2143
2144 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2145                                struct ieee80211_vif *vif, u16 ac,
2146                                const struct ieee80211_tx_queue_params *params)
2147 {
2148         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2149         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2150
2151         mvmvif->queue_params[ac] = *params;
2152
2153         /*
2154          * No need to update right away, we'll get BSS_CHANGED_QOS
2155          * The exception is P2P_DEVICE interface which needs immediate update.
2156          */
2157         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2158                 int ret;
2159
2160                 mutex_lock(&mvm->mutex);
2161                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2162                 mutex_unlock(&mvm->mutex);
2163                 return ret;
2164         }
2165         return 0;
2166 }
2167
2168 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2169                                       struct ieee80211_vif *vif)
2170 {
2171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2172         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2173                            200 + vif->bss_conf.beacon_int);
2174         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2175                                100 + vif->bss_conf.beacon_int);
2176
2177         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2178                 return;
2179
2180         /*
2181          * iwl_mvm_protect_session() reads directly from the device
2182          * (the system time), so make sure it is available.
2183          */
2184         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2185                 return;
2186
2187         mutex_lock(&mvm->mutex);
2188         /* Try really hard to protect the session and hear a beacon */
2189         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2190         mutex_unlock(&mvm->mutex);
2191
2192         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2193 }
2194
2195 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2196                                         struct ieee80211_vif *vif,
2197                                         struct cfg80211_sched_scan_request *req,
2198                                         struct ieee80211_scan_ies *ies)
2199 {
2200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2201         int ret;
2202
2203         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2204         if (ret)
2205                 return ret;
2206
2207         mutex_lock(&mvm->mutex);
2208
2209         /* Newest FW fixes sched scan while connected on another interface */
2210         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2211                 if (!vif->bss_conf.idle) {
2212                         ret = -EBUSY;
2213                         goto out;
2214                 }
2215         } else if (!iwl_mvm_is_idle(mvm)) {
2216                 ret = -EBUSY;
2217                 goto out;
2218         }
2219
2220         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2221                 ret = -EBUSY;
2222                 goto out;
2223         }
2224
2225         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2226
2227         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2228         if (ret)
2229                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2230 out:
2231         mutex_unlock(&mvm->mutex);
2232         return ret;
2233 }
2234
2235 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2236                                        struct ieee80211_vif *vif)
2237 {
2238         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2239         int ret;
2240
2241         mutex_lock(&mvm->mutex);
2242         ret = iwl_mvm_scan_offload_stop(mvm, false);
2243         mutex_unlock(&mvm->mutex);
2244         iwl_mvm_wait_for_async_handlers(mvm);
2245
2246         return ret;
2247 }
2248
2249 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2250                                enum set_key_cmd cmd,
2251                                struct ieee80211_vif *vif,
2252                                struct ieee80211_sta *sta,
2253                                struct ieee80211_key_conf *key)
2254 {
2255         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2256         int ret;
2257
2258         if (iwlwifi_mod_params.sw_crypto) {
2259                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2260                 return -EOPNOTSUPP;
2261         }
2262
2263         switch (key->cipher) {
2264         case WLAN_CIPHER_SUITE_TKIP:
2265                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2266                 /* fall-through */
2267         case WLAN_CIPHER_SUITE_CCMP:
2268                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2269                 break;
2270         case WLAN_CIPHER_SUITE_AES_CMAC:
2271                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2272                 break;
2273         case WLAN_CIPHER_SUITE_WEP40:
2274         case WLAN_CIPHER_SUITE_WEP104:
2275                 /*
2276                  * Support for TX only, at least for now, so accept
2277                  * the key and do nothing else. Then mac80211 will
2278                  * pass it for TX but we don't have to use it for RX.
2279                  */
2280                 return 0;
2281         default:
2282                 /* currently FW supports only one optional cipher scheme */
2283                 if (hw->n_cipher_schemes &&
2284                     hw->cipher_schemes->cipher == key->cipher)
2285                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2286                 else
2287                         return -EOPNOTSUPP;
2288         }
2289
2290         mutex_lock(&mvm->mutex);
2291
2292         switch (cmd) {
2293         case SET_KEY:
2294                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2295                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2296                         /*
2297                          * GTK on AP interface is a TX-only key, return 0;
2298                          * on IBSS they're per-station and because we're lazy
2299                          * we don't support them for RX, so do the same.
2300                          */
2301                         ret = 0;
2302                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2303                         break;
2304                 }
2305
2306                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2307                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2308                 if (ret) {
2309                         IWL_WARN(mvm, "set key failed\n");
2310                         /*
2311                          * can't add key for RX, but we don't need it
2312                          * in the device for TX so still return 0
2313                          */
2314                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2315                         ret = 0;
2316                 }
2317
2318                 break;
2319         case DISABLE_KEY:
2320                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2321                         ret = 0;
2322                         break;
2323                 }
2324
2325                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2326                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2327                 break;
2328         default:
2329                 ret = -EINVAL;
2330         }
2331
2332         mutex_unlock(&mvm->mutex);
2333         return ret;
2334 }
2335
2336 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2337                                         struct ieee80211_vif *vif,
2338                                         struct ieee80211_key_conf *keyconf,
2339                                         struct ieee80211_sta *sta,
2340                                         u32 iv32, u16 *phase1key)
2341 {
2342         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2343
2344         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2345                 return;
2346
2347         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2348 }
2349
2350
2351 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2352                                struct iwl_rx_packet *pkt, void *data)
2353 {
2354         struct iwl_mvm *mvm =
2355                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2356         struct iwl_hs20_roc_res *resp;
2357         int resp_len = iwl_rx_packet_payload_len(pkt);
2358         struct iwl_mvm_time_event_data *te_data = data;
2359
2360         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2361                 return true;
2362
2363         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2364                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2365                 return true;
2366         }
2367
2368         resp = (void *)pkt->data;
2369
2370         IWL_DEBUG_TE(mvm,
2371                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2372                      resp->status, resp->event_unique_id);
2373
2374         te_data->uid = le32_to_cpu(resp->event_unique_id);
2375         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2376                      te_data->uid);
2377
2378         spin_lock_bh(&mvm->time_event_lock);
2379         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2380         spin_unlock_bh(&mvm->time_event_lock);
2381
2382         return true;
2383 }
2384
2385 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2386 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2387                                     struct ieee80211_channel *channel,
2388                                     struct ieee80211_vif *vif,
2389                                     int duration)
2390 {
2391         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2392         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2393         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2394         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2395         struct iwl_notification_wait wait_time_event;
2396         struct iwl_hs20_roc_req aux_roc_req = {
2397                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2398                 .id_and_color =
2399                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2400                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2401                 /* Set the channel info data */
2402                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2403                         PHY_BAND_24 : PHY_BAND_5,
2404                 .channel_info.channel = channel->hw_value,
2405                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2406                 /* Set the time and duration */
2407                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2408                 .apply_time_max_delay =
2409                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2410                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2411          };
2412
2413         /* Set the node address */
2414         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2415
2416         lockdep_assert_held(&mvm->mutex);
2417
2418         spin_lock_bh(&mvm->time_event_lock);
2419
2420         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2421                 spin_unlock_bh(&mvm->time_event_lock);
2422                 return -EIO;
2423         }
2424
2425         te_data->vif = vif;
2426         te_data->duration = duration;
2427         te_data->id = HOT_SPOT_CMD;
2428
2429         spin_unlock_bh(&mvm->time_event_lock);
2430
2431         /*
2432          * Use a notification wait, which really just processes the
2433          * command response and doesn't wait for anything, in order
2434          * to be able to process the response and get the UID inside
2435          * the RX path. Using CMD_WANT_SKB doesn't work because it
2436          * stores the buffer and then wakes up this thread, by which
2437          * time another notification (that the time event started)
2438          * might already be processed unsuccessfully.
2439          */
2440         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2441                                    time_event_response,
2442                                    ARRAY_SIZE(time_event_response),
2443                                    iwl_mvm_rx_aux_roc, te_data);
2444
2445         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2446                                    &aux_roc_req);
2447
2448         if (res) {
2449                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2450                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2451                 goto out_clear_te;
2452         }
2453
2454         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2455         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2456         /* should never fail */
2457         WARN_ON_ONCE(res);
2458
2459         if (res) {
2460  out_clear_te:
2461                 spin_lock_bh(&mvm->time_event_lock);
2462                 iwl_mvm_te_clear_data(mvm, te_data);
2463                 spin_unlock_bh(&mvm->time_event_lock);
2464         }
2465
2466         return res;
2467 }
2468
2469 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2470                        struct ieee80211_vif *vif,
2471                        struct ieee80211_channel *channel,
2472                        int duration,
2473                        enum ieee80211_roc_type type)
2474 {
2475         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2476         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2477         struct cfg80211_chan_def chandef;
2478         struct iwl_mvm_phy_ctxt *phy_ctxt;
2479         int ret, i;
2480
2481         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2482                            duration, type);
2483
2484         mutex_lock(&mvm->mutex);
2485
2486         switch (vif->type) {
2487         case NL80211_IFTYPE_STATION:
2488                 /* Use aux roc framework (HS20) */
2489                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2490                                                vif, duration);
2491                 goto out_unlock;
2492         case NL80211_IFTYPE_P2P_DEVICE:
2493                 /* handle below */
2494                 break;
2495         default:
2496                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2497                 ret = -EINVAL;
2498                 goto out_unlock;
2499         }
2500
2501         for (i = 0; i < NUM_PHY_CTX; i++) {
2502                 phy_ctxt = &mvm->phy_ctxts[i];
2503                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2504                         continue;
2505
2506                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2507                         /*
2508                          * Unbind the P2P_DEVICE from the current PHY context,
2509                          * and if the PHY context is not used remove it.
2510                          */
2511                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2512                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2513                                 goto out_unlock;
2514
2515                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2516
2517                         /* Bind the P2P_DEVICE to the current PHY Context */
2518                         mvmvif->phy_ctxt = phy_ctxt;
2519
2520                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2521                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2522                                 goto out_unlock;
2523
2524                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2525                         goto schedule_time_event;
2526                 }
2527         }
2528
2529         /* Need to update the PHY context only if the ROC channel changed */
2530         if (channel == mvmvif->phy_ctxt->channel)
2531                 goto schedule_time_event;
2532
2533         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2534
2535         /*
2536          * Change the PHY context configuration as it is currently referenced
2537          * only by the P2P Device MAC
2538          */
2539         if (mvmvif->phy_ctxt->ref == 1) {
2540                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2541                                                &chandef, 1, 1);
2542                 if (ret)
2543                         goto out_unlock;
2544         } else {
2545                 /*
2546                  * The PHY context is shared with other MACs. Need to remove the
2547                  * P2P Device from the binding, allocate an new PHY context and
2548                  * create a new binding
2549                  */
2550                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2551                 if (!phy_ctxt) {
2552                         ret = -ENOSPC;
2553                         goto out_unlock;
2554                 }
2555
2556                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2557                                                1, 1);
2558                 if (ret) {
2559                         IWL_ERR(mvm, "Failed to change PHY context\n");
2560                         goto out_unlock;
2561                 }
2562
2563                 /* Unbind the P2P_DEVICE from the current PHY context */
2564                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2565                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2566                         goto out_unlock;
2567
2568                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2569
2570                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2571                 mvmvif->phy_ctxt = phy_ctxt;
2572
2573                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2574                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2575                         goto out_unlock;
2576
2577                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2578         }
2579
2580 schedule_time_event:
2581         /* Schedule the time events */
2582         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2583
2584 out_unlock:
2585         mutex_unlock(&mvm->mutex);
2586         IWL_DEBUG_MAC80211(mvm, "leave\n");
2587         return ret;
2588 }
2589
2590 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2591 {
2592         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2593
2594         IWL_DEBUG_MAC80211(mvm, "enter\n");
2595
2596         mutex_lock(&mvm->mutex);
2597         iwl_mvm_stop_p2p_roc(mvm);
2598         mutex_unlock(&mvm->mutex);
2599
2600         IWL_DEBUG_MAC80211(mvm, "leave\n");
2601         return 0;
2602 }
2603
2604 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2605                                  struct ieee80211_chanctx_conf *ctx)
2606 {
2607         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2608         struct iwl_mvm_phy_ctxt *phy_ctxt;
2609         int ret;
2610
2611         lockdep_assert_held(&mvm->mutex);
2612
2613         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2614
2615         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2616         if (!phy_ctxt) {
2617                 ret = -ENOSPC;
2618                 goto out;
2619         }
2620
2621         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2622                                        ctx->rx_chains_static,
2623                                        ctx->rx_chains_dynamic);
2624         if (ret) {
2625                 IWL_ERR(mvm, "Failed to add PHY context\n");
2626                 goto out;
2627         }
2628
2629         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2630         *phy_ctxt_id = phy_ctxt->id;
2631 out:
2632         return ret;
2633 }
2634
2635 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2636                                struct ieee80211_chanctx_conf *ctx)
2637 {
2638         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2639         int ret;
2640
2641         mutex_lock(&mvm->mutex);
2642         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2643         mutex_unlock(&mvm->mutex);
2644
2645         return ret;
2646 }
2647
2648 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2649                                      struct ieee80211_chanctx_conf *ctx)
2650 {
2651         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2652         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2653
2654         lockdep_assert_held(&mvm->mutex);
2655
2656         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2657 }
2658
2659 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2660                                    struct ieee80211_chanctx_conf *ctx)
2661 {
2662         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2663
2664         mutex_lock(&mvm->mutex);
2665         __iwl_mvm_remove_chanctx(mvm, ctx);
2666         mutex_unlock(&mvm->mutex);
2667 }
2668
2669 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2670                                    struct ieee80211_chanctx_conf *ctx,
2671                                    u32 changed)
2672 {
2673         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2674         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2675         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2676
2677         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2678                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2679                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2680                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2681                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2682                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2683                       phy_ctxt->ref, changed))
2684                 return;
2685
2686         mutex_lock(&mvm->mutex);
2687         iwl_mvm_bt_coex_vif_change(mvm);
2688         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2689                                  ctx->rx_chains_static,
2690                                  ctx->rx_chains_dynamic);
2691         mutex_unlock(&mvm->mutex);
2692 }
2693
2694 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2695                                         struct ieee80211_vif *vif,
2696                                         struct ieee80211_chanctx_conf *ctx,
2697                                         bool switching_chanctx)
2698 {
2699         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2700         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2701         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2702         int ret;
2703
2704         lockdep_assert_held(&mvm->mutex);
2705
2706         mvmvif->phy_ctxt = phy_ctxt;
2707
2708         switch (vif->type) {
2709         case NL80211_IFTYPE_AP:
2710                 /* Unless it's a CSA flow we have nothing to do here */
2711                 if (vif->csa_active) {
2712                         mvmvif->ap_ibss_active = true;
2713                         break;
2714                 }
2715         case NL80211_IFTYPE_ADHOC:
2716                 /*
2717                  * The AP binding flow is handled as part of the start_ap flow
2718                  * (in bss_info_changed), similarly for IBSS.
2719                  */
2720                 ret = 0;
2721                 goto out;
2722         case NL80211_IFTYPE_STATION:
2723                 break;
2724         case NL80211_IFTYPE_MONITOR:
2725                 /* always disable PS when a monitor interface is active */
2726                 mvmvif->ps_disabled = true;
2727                 break;
2728         default:
2729                 ret = -EINVAL;
2730                 goto out;
2731         }
2732
2733         ret = iwl_mvm_binding_add_vif(mvm, vif);
2734         if (ret)
2735                 goto out;
2736
2737         /*
2738          * Power state must be updated before quotas,
2739          * otherwise fw will complain.
2740          */
2741         iwl_mvm_power_update_mac(mvm);
2742
2743         /* Setting the quota at this stage is only required for monitor
2744          * interfaces. For the other types, the bss_info changed flow
2745          * will handle quota settings.
2746          */
2747         if (vif->type == NL80211_IFTYPE_MONITOR) {
2748                 mvmvif->monitor_active = true;
2749                 ret = iwl_mvm_update_quotas(mvm, NULL);
2750                 if (ret)
2751                         goto out_remove_binding;
2752         }
2753
2754         /* Handle binding during CSA */
2755         if ((vif->type == NL80211_IFTYPE_AP) ||
2756             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2757                 iwl_mvm_update_quotas(mvm, NULL);
2758                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2759         }
2760
2761         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2762                 struct iwl_mvm_sta *mvmsta;
2763
2764                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2765                                                           mvmvif->ap_sta_id);
2766
2767                 if (WARN_ON(!mvmsta))
2768                         goto out;
2769
2770                 /* TODO: only re-enable after the first beacon */
2771                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2772         }
2773
2774         goto out;
2775
2776 out_remove_binding:
2777         iwl_mvm_binding_remove_vif(mvm, vif);
2778         iwl_mvm_power_update_mac(mvm);
2779 out:
2780         if (ret)
2781                 mvmvif->phy_ctxt = NULL;
2782         return ret;
2783 }
2784 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2785                                       struct ieee80211_vif *vif,
2786                                       struct ieee80211_chanctx_conf *ctx)
2787 {
2788         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2789         int ret;
2790
2791         mutex_lock(&mvm->mutex);
2792         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2793         mutex_unlock(&mvm->mutex);
2794
2795         return ret;
2796 }
2797
2798 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2799                                            struct ieee80211_vif *vif,
2800                                            struct ieee80211_chanctx_conf *ctx,
2801                                            bool switching_chanctx)
2802 {
2803         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2804         struct ieee80211_vif *disabled_vif = NULL;
2805         struct iwl_mvm_sta *mvmsta;
2806
2807         lockdep_assert_held(&mvm->mutex);
2808
2809         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2810
2811         switch (vif->type) {
2812         case NL80211_IFTYPE_ADHOC:
2813                 goto out;
2814         case NL80211_IFTYPE_MONITOR:
2815                 mvmvif->monitor_active = false;
2816                 mvmvif->ps_disabled = false;
2817                 break;
2818         case NL80211_IFTYPE_AP:
2819                 /* This part is triggered only during CSA */
2820                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2821                         goto out;
2822
2823                 /* Set CS bit on all the stations */
2824                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2825
2826                 /* Save blocked iface, the timeout is set on the next beacon */
2827                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2828
2829                 mvmvif->ap_ibss_active = false;
2830                 break;
2831         case NL80211_IFTYPE_STATION:
2832                 if (!switching_chanctx)
2833                         break;
2834
2835                 disabled_vif = vif;
2836
2837                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2838                                                           mvmvif->ap_sta_id);
2839
2840                 if (!WARN_ON(!mvmsta))
2841                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2842
2843                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2844                 break;
2845         default:
2846                 break;
2847         }
2848
2849         iwl_mvm_update_quotas(mvm, disabled_vif);
2850         iwl_mvm_binding_remove_vif(mvm, vif);
2851
2852 out:
2853         mvmvif->phy_ctxt = NULL;
2854         iwl_mvm_power_update_mac(mvm);
2855 }
2856
2857 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2858                                          struct ieee80211_vif *vif,
2859                                          struct ieee80211_chanctx_conf *ctx)
2860 {
2861         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2862
2863         mutex_lock(&mvm->mutex);
2864         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2865         mutex_unlock(&mvm->mutex);
2866 }
2867
2868 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2869                                       struct ieee80211_vif_chanctx_switch *vifs,
2870                                       int n_vifs,
2871                                       enum ieee80211_chanctx_switch_mode mode)
2872 {
2873         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2874         int ret;
2875
2876         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2877         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2878                 return -EOPNOTSUPP;
2879
2880         mutex_lock(&mvm->mutex);
2881         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2882         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2883
2884         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2885         if (ret) {
2886                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2887                 goto out_reassign;
2888         }
2889
2890         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2891                                            true);
2892         if (ret) {
2893                 IWL_ERR(mvm,
2894                         "failed to assign new_ctx during channel switch\n");
2895                 goto out_remove;
2896         }
2897
2898         /* we don't support TDLS during DCM - can be caused by channel switch */
2899         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2900                 iwl_mvm_teardown_tdls_peers(mvm);
2901
2902         goto out;
2903
2904 out_remove:
2905         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2906
2907 out_reassign:
2908         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2909         if (ret) {
2910                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2911                 goto out_restart;
2912         }
2913
2914         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2915                                            true);
2916         if (ret) {
2917                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2918                 goto out_restart;
2919         }
2920
2921         goto out;
2922
2923 out_restart:
2924         /* things keep failing, better restart the hw */
2925         iwl_mvm_nic_restart(mvm, false);
2926
2927 out:
2928         mutex_unlock(&mvm->mutex);
2929         return ret;
2930 }
2931
2932 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2933                            struct ieee80211_sta *sta,
2934                            bool set)
2935 {
2936         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2937         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2938
2939         if (!mvm_sta || !mvm_sta->vif) {
2940                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2941                 return -EINVAL;
2942         }
2943
2944         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2945 }
2946
2947 #ifdef CONFIG_NL80211_TESTMODE
2948 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2949         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2950         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2951         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2952 };
2953
2954 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2955                                       struct ieee80211_vif *vif,
2956                                       void *data, int len)
2957 {
2958         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2959         int err;
2960         u32 noa_duration;
2961
2962         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2963         if (err)
2964                 return err;
2965
2966         if (!tb[IWL_MVM_TM_ATTR_CMD])
2967                 return -EINVAL;
2968
2969         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2970         case IWL_MVM_TM_CMD_SET_NOA:
2971                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2972                     !vif->bss_conf.enable_beacon ||
2973                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2974                         return -EINVAL;
2975
2976                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2977                 if (noa_duration >= vif->bss_conf.beacon_int)
2978                         return -EINVAL;
2979
2980                 mvm->noa_duration = noa_duration;
2981                 mvm->noa_vif = vif;
2982
2983                 return iwl_mvm_update_quotas(mvm, NULL);
2984         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2985                 /* must be associated client vif - ignore authorized */
2986                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2987                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2988                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2989                         return -EINVAL;
2990
2991                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2992                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2993                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2994         }
2995
2996         return -EOPNOTSUPP;
2997 }
2998
2999 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3000                                     struct ieee80211_vif *vif,
3001                                     void *data, int len)
3002 {
3003         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3004         int err;
3005
3006         mutex_lock(&mvm->mutex);
3007         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3008         mutex_unlock(&mvm->mutex);
3009
3010         return err;
3011 }
3012 #endif
3013
3014 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3015                                           struct ieee80211_vif *vif,
3016                                           struct cfg80211_chan_def *chandef)
3017 {
3018         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3019         struct ieee80211_vif *csa_vif;
3020
3021         mutex_lock(&mvm->mutex);
3022
3023         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3024                                             lockdep_is_held(&mvm->mutex));
3025         if (WARN(csa_vif && csa_vif->csa_active,
3026                  "Another CSA is already in progress"))
3027                 goto out_unlock;
3028
3029         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3030                            chandef->center_freq1);
3031         rcu_assign_pointer(mvm->csa_vif, vif);
3032
3033 out_unlock:
3034         mutex_unlock(&mvm->mutex);
3035 }
3036
3037 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3038                               struct ieee80211_vif *vif, u32 queues, bool drop)
3039 {
3040         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3041         struct iwl_mvm_vif *mvmvif;
3042         struct iwl_mvm_sta *mvmsta;
3043
3044         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3045                 return;
3046
3047         mutex_lock(&mvm->mutex);
3048         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3049         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3050
3051         if (WARN_ON_ONCE(!mvmsta)) {
3052                 mutex_unlock(&mvm->mutex);
3053                 return;
3054         }
3055
3056         if (drop) {
3057                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3058                         IWL_ERR(mvm, "flush request fail\n");
3059                 mutex_unlock(&mvm->mutex);
3060         } else {
3061                 u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
3062                 mutex_unlock(&mvm->mutex);
3063
3064                 /* this can take a while, and we may need/want other operations
3065                  * to succeed while doing this, so do it without the mutex held
3066                  */
3067                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
3068         }
3069 }
3070
3071 const struct ieee80211_ops iwl_mvm_hw_ops = {
3072         .tx = iwl_mvm_mac_tx,
3073         .ampdu_action = iwl_mvm_mac_ampdu_action,
3074         .start = iwl_mvm_mac_start,
3075         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3076         .stop = iwl_mvm_mac_stop,
3077         .add_interface = iwl_mvm_mac_add_interface,
3078         .remove_interface = iwl_mvm_mac_remove_interface,
3079         .config = iwl_mvm_mac_config,
3080         .prepare_multicast = iwl_mvm_prepare_multicast,
3081         .configure_filter = iwl_mvm_configure_filter,
3082         .bss_info_changed = iwl_mvm_bss_info_changed,
3083         .hw_scan = iwl_mvm_mac_hw_scan,
3084         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3085         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3086         .sta_state = iwl_mvm_mac_sta_state,
3087         .sta_notify = iwl_mvm_mac_sta_notify,
3088         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3089         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3090         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3091         .sta_rc_update = iwl_mvm_sta_rc_update,
3092         .conf_tx = iwl_mvm_mac_conf_tx,
3093         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3094         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3095         .flush = iwl_mvm_mac_flush,
3096         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3097         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3098         .set_key = iwl_mvm_mac_set_key,
3099         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3100         .remain_on_channel = iwl_mvm_roc,
3101         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3102         .add_chanctx = iwl_mvm_add_chanctx,
3103         .remove_chanctx = iwl_mvm_remove_chanctx,
3104         .change_chanctx = iwl_mvm_change_chanctx,
3105         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3106         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3107         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3108
3109         .start_ap = iwl_mvm_start_ap_ibss,
3110         .stop_ap = iwl_mvm_stop_ap_ibss,
3111         .join_ibss = iwl_mvm_start_ap_ibss,
3112         .leave_ibss = iwl_mvm_stop_ap_ibss,
3113
3114         .set_tim = iwl_mvm_set_tim,
3115
3116         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3117
3118         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3119
3120 #ifdef CONFIG_PM_SLEEP
3121         /* look at d3.c */
3122         .suspend = iwl_mvm_suspend,
3123         .resume = iwl_mvm_resume,
3124         .set_wakeup = iwl_mvm_set_wakeup,
3125         .set_rekey_data = iwl_mvm_set_rekey_data,
3126 #if IS_ENABLED(CONFIG_IPV6)
3127         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3128 #endif
3129         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3130 #endif
3131 };