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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  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
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  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.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "fw-api-scan.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 258 {
 259         int i;
 260         bool taken = false;
 261
 262         if (!iwl_mvm_is_d0i3_supported(mvm))
 263                 return true;
 264
 265         spin_lock_bh(&mvm->refs_lock);
 266         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 267                 if (mvm->refs[i]) {
 268                         taken = true;
 269                         break;
 270                 }
 271         }
 272         spin_unlock_bh(&mvm->refs_lock);
 273
 274         return taken;
 275 }
 276
 277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 278 {
 279         iwl_mvm_ref(mvm, ref_type);
 280
 281         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 282                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 283                                 HZ)) {
 284                 WARN_ON_ONCE(1);
 285                 iwl_mvm_unref(mvm, ref_type);
 286                 return -EIO;
 287         }
 288
 289         return 0;
 290 }
 291
 292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 293 {
 294         int i;
 295
 296         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 297         for (i = 0; i < NUM_PHY_CTX; i++) {
 298                 mvm->phy_ctxts[i].id = i;
 299                 mvm->phy_ctxts[i].ref = 0;
 300         }
 301 }
 302
 303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 304 {
 305         struct ieee80211_hw *hw = mvm->hw;
 306         int num_mac, ret, i;
 307
 308         /* Tell mac80211 our characteristics */
 309         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 310                     IEEE80211_HW_SPECTRUM_MGMT |
 311                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 312                     IEEE80211_HW_QUEUE_CONTROL |
 313                     IEEE80211_HW_WANT_MONITOR_VIF |
 314                     IEEE80211_HW_SUPPORTS_PS |
 315                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 316                     IEEE80211_HW_AMPDU_AGGREGATION |
 317                     IEEE80211_HW_TIMING_BEACON_ONLY |
 318                     IEEE80211_HW_CONNECTION_MONITOR |
 319                     IEEE80211_HW_CHANCTX_STA_CSA |
 320                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 321
 322         hw->queues = mvm->first_agg_queue;
 323         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 324         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 325                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 326         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 327                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 328         hw->rate_control_algorithm = "iwl-mvm-rs";
 329         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 330         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 331
 332         /*
 333          * Enable 11w if advertised by firmware and software crypto
 334          * is not enabled (as the firmware will interpret some mgmt
 335          * packets, so enabling it with software crypto isn't safe)
 336          */
 337         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 338             !iwlwifi_mod_params.sw_crypto)
 339                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 340
 341         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 342             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
 343                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 344                 hw->wiphy->features |=
 345                         NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 346                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 347         }
 348
 349         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 350         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 351         hw->chanctx_data_size = sizeof(u16);
 352
 353         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 354                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 355                 BIT(NL80211_IFTYPE_AP) |
 356                 BIT(NL80211_IFTYPE_P2P_GO) |
 357                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 358                 BIT(NL80211_IFTYPE_ADHOC);
 359
 360         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 361         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 362                                        REGULATORY_DISABLE_BEACON_HINTS;
 363
 364         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 365                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 366
 367         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 368
 369         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 370         hw->wiphy->n_iface_combinations =
 371                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 372
 373         hw->wiphy->max_remain_on_channel_duration = 10000;
 374         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 375
 376         /* Extract MAC address */
 377         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 378         hw->wiphy->addresses = mvm->addresses;
 379         hw->wiphy->n_addresses = 1;
 380
 381         /* Extract additional MAC addresses if available */
 382         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 383                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 384
 385         for (i = 1; i < num_mac; i++) {
 386                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 387                        ETH_ALEN);
 388                 mvm->addresses[i].addr[5]++;
 389                 hw->wiphy->n_addresses++;
 390         }
 391
 392         iwl_mvm_reset_phy_ctxts(mvm);
 393
 394         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 395
 396         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 397
 398         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 399                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 400                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 401         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 402                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 403                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 404
 405         hw->wiphy->hw_version = mvm->trans->hw_id;
 406
 407         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 408                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 409         else
 410                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 411
 412         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 413                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 414                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 415                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 416                 /* we create the 802.11 header and zero length SSID IE. */
 417                 hw->wiphy->max_sched_scan_ie_len =
 418                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 419         }
 420
 421         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 422                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 423                                NL80211_FEATURE_P2P_GO_OPPPS |
 424                                NL80211_FEATURE_DYNAMIC_SMPS |
 425                                NL80211_FEATURE_STATIC_SMPS |
 426                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 427
 428         if (mvm->fw->ucode_capa.capa[0] &
 429             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 430                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 431         if (mvm->fw->ucode_capa.capa[0] &
 432             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 433                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 434
 435         if (mvm->fw->ucode_capa.capa[0] &
 436             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 437                 hw->wiphy->features |=
 438                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 439
 440         if (mvm->fw->ucode_capa.capa[0] &
 441             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 442                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 443
 444         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 445
 446         /* currently FW API supports only one optional cipher scheme */
 447         if (mvm->fw->cs[0].cipher) {
 448                 mvm->hw->n_cipher_schemes = 1;
 449                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 450         }
 451
 452 #ifdef CONFIG_PM_SLEEP
 453         if (iwl_mvm_is_d0i3_supported(mvm) &&
 454             device_can_wakeup(mvm->trans->dev)) {
 455                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 456                 hw->wiphy->wowlan = &mvm->wowlan;
 457         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 458             mvm->trans->ops->d3_suspend &&
 459             mvm->trans->ops->d3_resume &&
 460             device_can_wakeup(mvm->trans->dev)) {
 461                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 462                                     WIPHY_WOWLAN_DISCONNECT |
 463                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 464                                     WIPHY_WOWLAN_RFKILL_RELEASE |
 465                                     WIPHY_WOWLAN_NET_DETECT;
 466                 if (!iwlwifi_mod_params.sw_crypto)
 467                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 468                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 469                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 470
 471                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 472                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 473                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 474                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 475                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 476                 hw->wiphy->wowlan = &mvm->wowlan;
 477         }
 478 #endif
 479
 480 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 481         /* assign default bcast filtering configuration */
 482         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 483 #endif
 484
 485         ret = iwl_mvm_leds_init(mvm);
 486         if (ret)
 487                 return ret;
 488
 489         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 490                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 491                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 492         }
 493
 494         if (mvm->fw->ucode_capa.capa[0] &
 495             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
 496                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 497                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 498         }
 499
 500         ret = ieee80211_register_hw(mvm->hw);
 501         if (ret)
 502                 iwl_mvm_leds_exit(mvm);
 503
 504         return ret;
 505 }
 506
 507 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 508                              struct ieee80211_sta *sta,
 509                              struct sk_buff *skb)
 510 {
 511         struct iwl_mvm_sta *mvmsta;
 512         bool defer = false;
 513
 514         /*
 515          * double check the IN_D0I3 flag both before and after
 516          * taking the spinlock, in order to prevent taking
 517          * the spinlock when not needed.
 518          */
 519         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 520                 return false;
 521
 522         spin_lock(&mvm->d0i3_tx_lock);
 523         /*
 524          * testing the flag again ensures the skb dequeue
 525          * loop (on d0i3 exit) hasn't run yet.
 526          */
 527         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 528                 goto out;
 529
 530         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 531         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 532             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 533                 goto out;
 534
 535         __skb_queue_tail(&mvm->d0i3_tx, skb);
 536         ieee80211_stop_queues(mvm->hw);
 537
 538         /* trigger wakeup */
 539         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 540         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 541
 542         defer = true;
 543 out:
 544         spin_unlock(&mvm->d0i3_tx_lock);
 545         return defer;
 546 }
 547
 548 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 549                            struct ieee80211_tx_control *control,
 550                            struct sk_buff *skb)
 551 {
 552         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 553         struct ieee80211_sta *sta = control->sta;
 554         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 555         struct ieee80211_hdr *hdr = (void *)skb->data;
 556
 557         if (iwl_mvm_is_radio_killed(mvm)) {
 558                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 559                 goto drop;
 560         }
 561
 562         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 563             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 564             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 565                 goto drop;
 566
 567         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 568         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 569                      ieee80211_is_mgmt(hdr->frame_control) &&
 570                      !ieee80211_is_deauth(hdr->frame_control) &&
 571                      !ieee80211_is_disassoc(hdr->frame_control) &&
 572                      !ieee80211_is_action(hdr->frame_control)))
 573                 sta = NULL;
 574
 575         if (sta) {
 576                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 577                         return;
 578                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 579                         goto drop;
 580                 return;
 581         }
 582
 583         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 584                 goto drop;
 585         return;
 586  drop:
 587         ieee80211_free_txskb(hw, skb);
 588 }
 589
 590 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 591 {
 592         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 593                 return false;
 594         return true;
 595 }
 596
 597 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 598 {
 599         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 600                 return false;
 601         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 602                 return true;
 603
 604         /* enabled by default */
 605         return true;
 606 }
 607
 608 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 609                                     struct ieee80211_vif *vif,
 610                                     enum ieee80211_ampdu_mlme_action action,
 611                                     struct ieee80211_sta *sta, u16 tid,
 612                                     u16 *ssn, u8 buf_size)
 613 {
 614         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 615         int ret;
 616         bool tx_agg_ref = false;
 617
 618         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 619                      sta->addr, tid, action);
 620
 621         if (!(mvm->nvm_data->sku_cap_11n_enable))
 622                 return -EACCES;
 623
 624         /* return from D0i3 before starting a new Tx aggregation */
 625         switch (action) {
 626         case IEEE80211_AMPDU_TX_START:
 627         case IEEE80211_AMPDU_TX_STOP_CONT:
 628         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 629         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 630         case IEEE80211_AMPDU_TX_OPERATIONAL:
 631                 /*
 632                  * for tx start, wait synchronously until D0i3 exit to
 633                  * get the correct sequence number for the tid.
 634                  * additionally, some other ampdu actions use direct
 635                  * target access, which is not handled automatically
 636                  * by the trans layer (unlike commands), so wait for
 637                  * d0i3 exit in these cases as well.
 638                  */
 639                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 640                 if (ret)
 641                         return ret;
 642
 643                 tx_agg_ref = true;
 644                 break;
 645         default:
 646                 break;
 647         }
 648
 649         mutex_lock(&mvm->mutex);
 650
 651         switch (action) {
 652         case IEEE80211_AMPDU_RX_START:
 653                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 654                         ret = -EINVAL;
 655                         break;
 656                 }
 657                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 658                 break;
 659         case IEEE80211_AMPDU_RX_STOP:
 660                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 661                 break;
 662         case IEEE80211_AMPDU_TX_START:
 663                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 664                         ret = -EINVAL;
 665                         break;
 666                 }
 667                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 668                 break;
 669         case IEEE80211_AMPDU_TX_STOP_CONT:
 670                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 671                 break;
 672         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 673         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 674                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 675                 break;
 676         case IEEE80211_AMPDU_TX_OPERATIONAL:
 677                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 678                 break;
 679         default:
 680                 WARN_ON_ONCE(1);
 681                 ret = -EINVAL;
 682                 break;
 683         }
 684         mutex_unlock(&mvm->mutex);
 685
 686         /*
 687          * If the tid is marked as started, we won't use it for offloaded
 688          * traffic on the next D0i3 entry. It's safe to unref.
 689          */
 690         if (tx_agg_ref)
 691                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 692
 693         return ret;
 694 }
 695
 696 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 697                                      struct ieee80211_vif *vif)
 698 {
 699         struct iwl_mvm *mvm = data;
 700         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 701
 702         mvmvif->uploaded = false;
 703         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 704
 705         /* does this make sense at all? */
 706         mvmvif->color++;
 707
 708         spin_lock_bh(&mvm->time_event_lock);
 709         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 710         spin_unlock_bh(&mvm->time_event_lock);
 711
 712         mvmvif->phy_ctxt = NULL;
 713         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 714 }
 715
 716 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 717                                      const void *data, size_t datalen)
 718 {
 719         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 720         ssize_t bytes_read;
 721         ssize_t bytes_read_trans;
 722
 723         if (offset < dump_ptrs->op_mode_len) {
 724                 bytes_read = min_t(ssize_t, count,
 725                                    dump_ptrs->op_mode_len - offset);
 726                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 727                        bytes_read);
 728                 offset += bytes_read;
 729                 count -= bytes_read;
 730
 731                 if (count == 0)
 732                         return bytes_read;
 733         } else {
 734                 bytes_read = 0;
 735         }
 736
 737         if (!dump_ptrs->trans_ptr)
 738                 return bytes_read;
 739
 740         offset -= dump_ptrs->op_mode_len;
 741         bytes_read_trans = min_t(ssize_t, count,
 742                                  dump_ptrs->trans_ptr->len - offset);
 743         memcpy(buffer + bytes_read,
 744                (u8 *)dump_ptrs->trans_ptr->data + offset,
 745                bytes_read_trans);
 746
 747         return bytes_read + bytes_read_trans;
 748 }
 749
 750 static void iwl_mvm_free_coredump(const void *data)
 751 {
 752         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 753
 754         vfree(fw_error_dump->op_mode_ptr);
 755         vfree(fw_error_dump->trans_ptr);
 756         kfree(fw_error_dump);
 757 }
 758
 759 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 760 {
 761         struct iwl_fw_error_dump_file *dump_file;
 762         struct iwl_fw_error_dump_data *dump_data;
 763         struct iwl_fw_error_dump_info *dump_info;
 764         struct iwl_mvm_dump_ptrs *fw_error_dump;
 765         const struct fw_img *img;
 766         u32 sram_len, sram_ofs;
 767         u32 file_len, rxf_len;
 768         unsigned long flags;
 769         int reg_val;
 770
 771         lockdep_assert_held(&mvm->mutex);
 772
 773         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 774         if (!fw_error_dump)
 775                 return;
 776
 777         img = &mvm->fw->img[mvm->cur_ucode];
 778         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 779         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 780
 781         /* reading buffer size */
 782         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 783         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 784
 785         /* the register holds the value divided by 128 */
 786         rxf_len = rxf_len << 7;
 787
 788         file_len = sizeof(*dump_file) +
 789                    sizeof(*dump_data) * 3 +
 790                    sram_len +
 791                    rxf_len +
 792                    sizeof(*dump_info);
 793
 794         dump_file = vzalloc(file_len);
 795         if (!dump_file) {
 796                 kfree(fw_error_dump);
 797                 return;
 798         }
 799
 800         fw_error_dump->op_mode_ptr = dump_file;
 801
 802         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 803         dump_data = (void *)dump_file->data;
 804
 805         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 806         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 807         dump_info = (void *) dump_data->data;
 808         dump_info->device_family =
 809                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 810                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 811                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 812         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 813                sizeof(dump_info->fw_human_readable));
 814         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 815                 sizeof(dump_info->dev_human_readable));
 816         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 817                 sizeof(dump_info->bus_human_readable));
 818
 819         dump_data = iwl_fw_error_next_data(dump_data);
 820         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 821         dump_data->len = cpu_to_le32(rxf_len);
 822
 823         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 824                 u32 *rxf = (void *)dump_data->data;
 825                 int i;
 826
 827                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 828                         iwl_trans_write_prph(mvm->trans,
 829                                              RXF_LD_FENCE_OFFSET_ADDR,
 830                                              i * sizeof(u32));
 831                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 832                                                      RXF_FIFO_RD_FENCE_ADDR);
 833                 }
 834                 iwl_trans_release_nic_access(mvm->trans, &flags);
 835         }
 836
 837         dump_data = iwl_fw_error_next_data(dump_data);
 838         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 839         dump_data->len = cpu_to_le32(sram_len);
 840         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 841                                  sram_len);
 842
 843         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 844         fw_error_dump->op_mode_len = file_len;
 845         if (fw_error_dump->trans_ptr)
 846                 file_len += fw_error_dump->trans_ptr->len;
 847         dump_file->file_len = cpu_to_le32(file_len);
 848
 849         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 850                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 851 }
 852
 853 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 854 {
 855         /* clear the D3 reconfig, we only need it to avoid dumping a
 856          * firmware coredump on reconfiguration, we shouldn't do that
 857          * on D3->D0 transition
 858          */
 859         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
 860                 iwl_mvm_fw_error_dump(mvm);
 861
 862         iwl_trans_stop_device(mvm->trans);
 863
 864         mvm->scan_status = IWL_MVM_SCAN_NONE;
 865         mvm->ps_disabled = false;
 866         mvm->calibrating = false;
 867
 868         /* just in case one was running */
 869         ieee80211_remain_on_channel_expired(mvm->hw);
 870
 871         ieee80211_iterate_active_interfaces_atomic(
 872                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 873                 iwl_mvm_cleanup_iterator, mvm);
 874
 875         mvm->p2p_device_vif = NULL;
 876         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 877
 878         iwl_mvm_reset_phy_ctxts(mvm);
 879         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 880         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 881         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
 882         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 883         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 884         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 885         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 886         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 887         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 888
 889         ieee80211_wake_queues(mvm->hw);
 890
 891         /* cleanup all stale references (scan, roc), but keep the
 892          * ucode_down ref until reconfig is complete */
 893         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 894
 895         /* clear any stale d0i3 state */
 896         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 897
 898         mvm->vif_count = 0;
 899         mvm->rx_ba_sessions = 0;
 900 }
 901
 902 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 903 {
 904         int ret;
 905
 906         lockdep_assert_held(&mvm->mutex);
 907
 908         /* Clean up some internal and mac80211 state on restart */
 909         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 910                 iwl_mvm_restart_cleanup(mvm);
 911
 912         ret = iwl_mvm_up(mvm);
 913
 914         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 915                 /* Something went wrong - we need to finish some cleanup
 916                  * that normally iwl_mvm_mac_restart_complete() below
 917                  * would do.
 918                  */
 919                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 920                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 921         }
 922
 923         return ret;
 924 }
 925
 926 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 927 {
 928         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 929         int ret;
 930
 931         mutex_lock(&mvm->mutex);
 932         ret = __iwl_mvm_mac_start(mvm);
 933         mutex_unlock(&mvm->mutex);
 934
 935         return ret;
 936 }
 937
 938 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 939 {
 940         int ret;
 941
 942         mutex_lock(&mvm->mutex);
 943
 944         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 945         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 946         ret = iwl_mvm_update_quotas(mvm, NULL);
 947         if (ret)
 948                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 949                         ret);
 950
 951         /* allow transport/FW low power modes */
 952         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 953
 954         /*
 955          * If we have TDLS peers, remove them. We don't know the last seqno/PN
 956          * of packets the FW sent out, so we must reconnect.
 957          */
 958         iwl_mvm_teardown_tdls_peers(mvm);
 959
 960         mutex_unlock(&mvm->mutex);
 961 }
 962
 963 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
 964 {
 965         bool exit_now;
 966
 967         if (!iwl_mvm_is_d0i3_supported(mvm))
 968                 return;
 969
 970         mutex_lock(&mvm->d0i3_suspend_mutex);
 971         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
 972         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
 973                                         &mvm->d0i3_suspend_flags);
 974         mutex_unlock(&mvm->d0i3_suspend_mutex);
 975
 976         if (exit_now) {
 977                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
 978                 _iwl_mvm_exit_d0i3(mvm);
 979         }
 980 }
 981
 982 static void
 983 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 984                               enum ieee80211_reconfig_type reconfig_type)
 985 {
 986         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 987
 988         switch (reconfig_type) {
 989         case IEEE80211_RECONFIG_TYPE_RESTART:
 990                 iwl_mvm_restart_complete(mvm);
 991                 break;
 992         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 993                 iwl_mvm_resume_complete(mvm);
 994                 break;
 995         }
 996 }
 997
 998 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 999 {
1000         lockdep_assert_held(&mvm->mutex);
1001
1002         /* disallow low power states when the FW is down */
1003         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1004
1005         /* async_handlers_wk is now blocked */
1006
1007         /*
1008          * The work item could be running or queued if the
1009          * ROC time event stops just as we get here.
1010          */
1011         cancel_work_sync(&mvm->roc_done_wk);
1012
1013         iwl_trans_stop_device(mvm->trans);
1014
1015         iwl_mvm_async_handlers_purge(mvm);
1016         /* async_handlers_list is empty and will stay empty: HW is stopped */
1017
1018         /* the fw is stopped, the aux sta is dead: clean up driver state */
1019         iwl_mvm_del_aux_sta(mvm);
1020
1021         mvm->ucode_loaded = false;
1022 }
1023
1024 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1025 {
1026         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1027
1028         flush_work(&mvm->d0i3_exit_work);
1029         flush_work(&mvm->async_handlers_wk);
1030         flush_work(&mvm->fw_error_dump_wk);
1031
1032         mutex_lock(&mvm->mutex);
1033         __iwl_mvm_mac_stop(mvm);
1034         mutex_unlock(&mvm->mutex);
1035
1036         /*
1037          * The worker might have been waiting for the mutex, let it run and
1038          * discover that its list is now empty.
1039          */
1040         cancel_work_sync(&mvm->async_handlers_wk);
1041 }
1042
1043 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1044 {
1045         u16 i;
1046
1047         lockdep_assert_held(&mvm->mutex);
1048
1049         for (i = 0; i < NUM_PHY_CTX; i++)
1050                 if (!mvm->phy_ctxts[i].ref)
1051                         return &mvm->phy_ctxts[i];
1052
1053         IWL_ERR(mvm, "No available PHY context\n");
1054         return NULL;
1055 }
1056
1057 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1058                                 s8 tx_power)
1059 {
1060         /* FW is in charge of regulatory enforcement */
1061         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1062                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1063                 .pwr_restriction = cpu_to_le16(tx_power),
1064         };
1065
1066         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1067                                     sizeof(reduce_txpwr_cmd),
1068                                     &reduce_txpwr_cmd);
1069 }
1070
1071 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1072                                      struct ieee80211_vif *vif)
1073 {
1074         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1075         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1076         int ret;
1077
1078         /*
1079          * make sure D0i3 exit is completed, otherwise a target access
1080          * during tx queue configuration could be done when still in
1081          * D0i3 state.
1082          */
1083         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1084         if (ret)
1085                 return ret;
1086
1087         /*
1088          * Not much to do here. The stack will not allow interface
1089          * types or combinations that we didn't advertise, so we
1090          * don't really have to check the types.
1091          */
1092
1093         mutex_lock(&mvm->mutex);
1094
1095         /* Allocate resources for the MAC context, and add it to the fw  */
1096         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1097         if (ret)
1098                 goto out_unlock;
1099
1100         /* Counting number of interfaces is needed for legacy PM */
1101         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1102                 mvm->vif_count++;
1103
1104         /*
1105          * The AP binding flow can be done only after the beacon
1106          * template is configured (which happens only in the mac80211
1107          * start_ap() flow), and adding the broadcast station can happen
1108          * only after the binding.
1109          * In addition, since modifying the MAC before adding a bcast
1110          * station is not allowed by the FW, delay the adding of MAC context to
1111          * the point where we can also add the bcast station.
1112          * In short: there's not much we can do at this point, other than
1113          * allocating resources :)
1114          */
1115         if (vif->type == NL80211_IFTYPE_AP ||
1116             vif->type == NL80211_IFTYPE_ADHOC) {
1117                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1118                 if (ret) {
1119                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1120                         goto out_release;
1121                 }
1122
1123                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1124                 goto out_unlock;
1125         }
1126
1127         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1128         if (ret)
1129                 goto out_release;
1130
1131         ret = iwl_mvm_power_update_mac(mvm);
1132         if (ret)
1133                 goto out_release;
1134
1135         /* beacon filtering */
1136         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1137         if (ret)
1138                 goto out_remove_mac;
1139
1140         if (!mvm->bf_allowed_vif &&
1141             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1142                 mvm->bf_allowed_vif = mvmvif;
1143                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1144                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1145                 if (mvm->fw->ucode_capa.flags &
1146                                         IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
1147                     !iwlwifi_mod_params.uapsd_disable)
1148                         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
1149         }
1150
1151         /*
1152          * P2P_DEVICE interface does not have a channel context assigned to it,
1153          * so a dedicated PHY context is allocated to it and the corresponding
1154          * MAC context is bound to it at this stage.
1155          */
1156         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1157
1158                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1159                 if (!mvmvif->phy_ctxt) {
1160                         ret = -ENOSPC;
1161                         goto out_free_bf;
1162                 }
1163
1164                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1165                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1166                 if (ret)
1167                         goto out_unref_phy;
1168
1169                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1170                 if (ret)
1171                         goto out_unbind;
1172
1173                 /* Save a pointer to p2p device vif, so it can later be used to
1174                  * update the p2p device MAC when a GO is started/stopped */
1175                 mvm->p2p_device_vif = vif;
1176         }
1177
1178         iwl_mvm_vif_dbgfs_register(mvm, vif);
1179         goto out_unlock;
1180
1181  out_unbind:
1182         iwl_mvm_binding_remove_vif(mvm, vif);
1183  out_unref_phy:
1184         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1185  out_free_bf:
1186         if (mvm->bf_allowed_vif == mvmvif) {
1187                 mvm->bf_allowed_vif = NULL;
1188                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1189                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1190         }
1191  out_remove_mac:
1192         mvmvif->phy_ctxt = NULL;
1193         iwl_mvm_mac_ctxt_remove(mvm, vif);
1194  out_release:
1195         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1196                 mvm->vif_count--;
1197
1198         iwl_mvm_mac_ctxt_release(mvm, vif);
1199  out_unlock:
1200         mutex_unlock(&mvm->mutex);
1201
1202         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1203
1204         return ret;
1205 }
1206
1207 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1208                                         struct ieee80211_vif *vif)
1209 {
1210         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1211
1212         if (tfd_msk) {
1213                 mutex_lock(&mvm->mutex);
1214                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1215                 mutex_unlock(&mvm->mutex);
1216         }
1217
1218         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1219                 /*
1220                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1221                  * We assume here that all the packets sent to the OFFCHANNEL
1222                  * queue are sent in ROC session.
1223                  */
1224                 flush_work(&mvm->roc_done_wk);
1225         } else {
1226                 /*
1227                  * By now, all the AC queues are empty. The AGG queues are
1228                  * empty too. We already got all the Tx responses for all the
1229                  * packets in the queues. The drain work can have been
1230                  * triggered. Flush it.
1231                  */
1232                 flush_work(&mvm->sta_drained_wk);
1233         }
1234 }
1235
1236 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1237                                          struct ieee80211_vif *vif)
1238 {
1239         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1240         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1241
1242         iwl_mvm_prepare_mac_removal(mvm, vif);
1243
1244         mutex_lock(&mvm->mutex);
1245
1246         if (mvm->bf_allowed_vif == mvmvif) {
1247                 mvm->bf_allowed_vif = NULL;
1248                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1249                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1250         }
1251
1252         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1253
1254         /*
1255          * For AP/GO interface, the tear down of the resources allocated to the
1256          * interface is be handled as part of the stop_ap flow.
1257          */
1258         if (vif->type == NL80211_IFTYPE_AP ||
1259             vif->type == NL80211_IFTYPE_ADHOC) {
1260 #ifdef CONFIG_NL80211_TESTMODE
1261                 if (vif == mvm->noa_vif) {
1262                         mvm->noa_vif = NULL;
1263                         mvm->noa_duration = 0;
1264                 }
1265 #endif
1266                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1267                 goto out_release;
1268         }
1269
1270         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1271                 mvm->p2p_device_vif = NULL;
1272                 iwl_mvm_rm_bcast_sta(mvm, vif);
1273                 iwl_mvm_binding_remove_vif(mvm, vif);
1274                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1275                 mvmvif->phy_ctxt = NULL;
1276         }
1277
1278         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1279                 mvm->vif_count--;
1280
1281         iwl_mvm_power_update_mac(mvm);
1282         iwl_mvm_mac_ctxt_remove(mvm, vif);
1283
1284 out_release:
1285         iwl_mvm_mac_ctxt_release(mvm, vif);
1286         mutex_unlock(&mvm->mutex);
1287 }
1288
1289 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1290 {
1291         return 0;
1292 }
1293
1294 struct iwl_mvm_mc_iter_data {
1295         struct iwl_mvm *mvm;
1296         int port_id;
1297 };
1298
1299 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1300                                       struct ieee80211_vif *vif)
1301 {
1302         struct iwl_mvm_mc_iter_data *data = _data;
1303         struct iwl_mvm *mvm = data->mvm;
1304         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1305         int ret, len;
1306
1307         /* if we don't have free ports, mcast frames will be dropped */
1308         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1309                 return;
1310
1311         if (vif->type != NL80211_IFTYPE_STATION ||
1312             !vif->bss_conf.assoc)
1313                 return;
1314
1315         cmd->port_id = data->port_id++;
1316         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1317         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1318
1319         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1320         if (ret)
1321                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1322 }
1323
1324 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1325 {
1326         struct iwl_mvm_mc_iter_data iter_data = {
1327                 .mvm = mvm,
1328         };
1329
1330         lockdep_assert_held(&mvm->mutex);
1331
1332         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1333                 return;
1334
1335         ieee80211_iterate_active_interfaces_atomic(
1336                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1337                 iwl_mvm_mc_iface_iterator, &iter_data);
1338 }
1339
1340 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1341                                      struct netdev_hw_addr_list *mc_list)
1342 {
1343         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1344         struct iwl_mcast_filter_cmd *cmd;
1345         struct netdev_hw_addr *addr;
1346         int addr_count;
1347         bool pass_all;
1348         int len;
1349
1350         addr_count = netdev_hw_addr_list_count(mc_list);
1351         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1352                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1353         if (pass_all)
1354                 addr_count = 0;
1355
1356         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1357         cmd = kzalloc(len, GFP_ATOMIC);
1358         if (!cmd)
1359                 return 0;
1360
1361         if (pass_all) {
1362                 cmd->pass_all = 1;
1363                 return (u64)(unsigned long)cmd;
1364         }
1365
1366         netdev_hw_addr_list_for_each(addr, mc_list) {
1367                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1368                                    cmd->count, addr->addr);
1369                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1370                        addr->addr, ETH_ALEN);
1371                 cmd->count++;
1372         }
1373
1374         return (u64)(unsigned long)cmd;
1375 }
1376
1377 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1378                                      unsigned int changed_flags,
1379                                      unsigned int *total_flags,
1380                                      u64 multicast)
1381 {
1382         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1383         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1384
1385         mutex_lock(&mvm->mutex);
1386
1387         /* replace previous configuration */
1388         kfree(mvm->mcast_filter_cmd);
1389         mvm->mcast_filter_cmd = cmd;
1390
1391         if (!cmd)
1392                 goto out;
1393
1394         iwl_mvm_recalc_multicast(mvm);
1395 out:
1396         mutex_unlock(&mvm->mutex);
1397         *total_flags = 0;
1398 }
1399
1400 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1401 struct iwl_bcast_iter_data {
1402         struct iwl_mvm *mvm;
1403         struct iwl_bcast_filter_cmd *cmd;
1404         u8 current_filter;
1405 };
1406
1407 static void
1408 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1409                          const struct iwl_fw_bcast_filter *in_filter,
1410                          struct iwl_fw_bcast_filter *out_filter)
1411 {
1412         struct iwl_fw_bcast_filter_attr *attr;
1413         int i;
1414
1415         memcpy(out_filter, in_filter, sizeof(*out_filter));
1416
1417         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1418                 attr = &out_filter->attrs[i];
1419
1420                 if (!attr->mask)
1421                         break;
1422
1423                 switch (attr->reserved1) {
1424                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1425                         if (vif->bss_conf.arp_addr_cnt != 1) {
1426                                 attr->mask = 0;
1427                                 continue;
1428                         }
1429
1430                         attr->val = vif->bss_conf.arp_addr_list[0];
1431                         break;
1432                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1433                         attr->val = *(__be32 *)&vif->addr[2];
1434                         break;
1435                 default:
1436                         break;
1437                 }
1438                 attr->reserved1 = 0;
1439                 out_filter->num_attrs++;
1440         }
1441 }
1442
1443 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1444                                           struct ieee80211_vif *vif)
1445 {
1446         struct iwl_bcast_iter_data *data = _data;
1447         struct iwl_mvm *mvm = data->mvm;
1448         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1449         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1450         struct iwl_fw_bcast_mac *bcast_mac;
1451         int i;
1452
1453         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1454                 return;
1455
1456         bcast_mac = &cmd->macs[mvmvif->id];
1457
1458         /*
1459          * enable filtering only for associated stations, but not for P2P
1460          * Clients
1461          */
1462         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1463             !vif->bss_conf.assoc)
1464                 return;
1465
1466         bcast_mac->default_discard = 1;
1467
1468         /* copy all configured filters */
1469         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1470                 /*
1471                  * Make sure we don't exceed our filters limit.
1472                  * if there is still a valid filter to be configured,
1473                  * be on the safe side and just allow bcast for this mac.
1474                  */
1475                 if (WARN_ON_ONCE(data->current_filter >=
1476                                  ARRAY_SIZE(cmd->filters))) {
1477                         bcast_mac->default_discard = 0;
1478                         bcast_mac->attached_filters = 0;
1479                         break;
1480                 }
1481
1482                 iwl_mvm_set_bcast_filter(vif,
1483                                          &mvm->bcast_filters[i],
1484                                          &cmd->filters[data->current_filter]);
1485
1486                 /* skip current filter if it contains no attributes */
1487                 if (!cmd->filters[data->current_filter].num_attrs)
1488                         continue;
1489
1490                 /* attach the filter to current mac */
1491                 bcast_mac->attached_filters |=
1492                                 cpu_to_le16(BIT(data->current_filter));
1493
1494                 data->current_filter++;
1495         }
1496 }
1497
1498 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1499                                     struct iwl_bcast_filter_cmd *cmd)
1500 {
1501         struct iwl_bcast_iter_data iter_data = {
1502                 .mvm = mvm,
1503                 .cmd = cmd,
1504         };
1505
1506         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1507                 return false;
1508
1509         memset(cmd, 0, sizeof(*cmd));
1510         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1511         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1512
1513 #ifdef CONFIG_IWLWIFI_DEBUGFS
1514         /* use debugfs filters/macs if override is configured */
1515         if (mvm->dbgfs_bcast_filtering.override) {
1516                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1517                        sizeof(cmd->filters));
1518                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1519                        sizeof(cmd->macs));
1520                 return true;
1521         }
1522 #endif
1523
1524         /* if no filters are configured, do nothing */
1525         if (!mvm->bcast_filters)
1526                 return false;
1527
1528         /* configure and attach these filters for each associated sta vif */
1529         ieee80211_iterate_active_interfaces(
1530                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1531                 iwl_mvm_bcast_filter_iterator, &iter_data);
1532
1533         return true;
1534 }
1535 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1536                                           struct ieee80211_vif *vif)
1537 {
1538         struct iwl_bcast_filter_cmd cmd;
1539
1540         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1541                 return 0;
1542
1543         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1544                 return 0;
1545
1546         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1547                                     sizeof(cmd), &cmd);
1548 }
1549 #else
1550 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1551                                                  struct ieee80211_vif *vif)
1552 {
1553         return 0;
1554 }
1555 #endif
1556
1557 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1558                                              struct ieee80211_vif *vif,
1559                                              struct ieee80211_bss_conf *bss_conf,
1560                                              u32 changes)
1561 {
1562         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1563         int ret;
1564
1565         /*
1566          * Re-calculate the tsf id, as the master-slave relations depend on the
1567          * beacon interval, which was not known when the station interface was
1568          * added.
1569          */
1570         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1571                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1572
1573         /*
1574          * If we're not associated yet, take the (new) BSSID before associating
1575          * so the firmware knows. If we're already associated, then use the old
1576          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1577          * branch for disassociation below.
1578          */
1579         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1580                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1581
1582         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1583         if (ret)
1584                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1585
1586         /* after sending it once, adopt mac80211 data */
1587         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1588         mvmvif->associated = bss_conf->assoc;
1589
1590         if (changes & BSS_CHANGED_ASSOC) {
1591                 if (bss_conf->assoc) {
1592                         /* add quota for this interface */
1593                         ret = iwl_mvm_update_quotas(mvm, NULL);
1594                         if (ret) {
1595                                 IWL_ERR(mvm, "failed to update quotas\n");
1596                                 return;
1597                         }
1598
1599                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1600                                      &mvm->status)) {
1601                                 /*
1602                                  * If we're restarting then the firmware will
1603                                  * obviously have lost synchronisation with
1604                                  * the AP. It will attempt to synchronise by
1605                                  * itself, but we can make it more reliable by
1606                                  * scheduling a session protection time event.
1607                                  *
1608                                  * The firmware needs to receive a beacon to
1609                                  * catch up with synchronisation, use 110% of
1610                                  * the beacon interval.
1611                                  *
1612                                  * Set a large maximum delay to allow for more
1613                                  * than a single interface.
1614                                  */
1615                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1616                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1617                                                         5 * dur, false);
1618                         }
1619
1620                         iwl_mvm_sf_update(mvm, vif, false);
1621                         iwl_mvm_power_vif_assoc(mvm, vif);
1622                         if (vif->p2p) {
1623                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1624                                 iwl_mvm_update_smps(mvm, vif,
1625                                                     IWL_MVM_SMPS_REQ_PROT,
1626                                                     IEEE80211_SMPS_DYNAMIC);
1627                         }
1628                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1629                         /*
1630                          * If update fails - SF might be running in associated
1631                          * mode while disassociated - which is forbidden.
1632                          */
1633                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1634                                   "Failed to update SF upon disassociation\n");
1635
1636                         /* remove AP station now that the MAC is unassoc */
1637                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1638                         if (ret)
1639                                 IWL_ERR(mvm, "failed to remove AP station\n");
1640
1641                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1642                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1643                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1644                         /* remove quota for this interface */
1645                         ret = iwl_mvm_update_quotas(mvm, NULL);
1646                         if (ret)
1647                                 IWL_ERR(mvm, "failed to update quotas\n");
1648
1649                         if (vif->p2p)
1650                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1651
1652                         /* this will take the cleared BSSID from bss_conf */
1653                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1654                         if (ret)
1655                                 IWL_ERR(mvm,
1656                                         "failed to update MAC %pM (clear after unassoc)\n",
1657                                         vif->addr);
1658                 }
1659
1660                 iwl_mvm_recalc_multicast(mvm);
1661                 iwl_mvm_configure_bcast_filter(mvm, vif);
1662
1663                 /* reset rssi values */
1664                 mvmvif->bf_data.ave_beacon_signal = 0;
1665
1666                 iwl_mvm_bt_coex_vif_change(mvm);
1667                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1668                                     IEEE80211_SMPS_AUTOMATIC);
1669         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1670                 /*
1671                  * We received a beacon _after_ association so
1672                  * remove the session protection.
1673                  */
1674                 iwl_mvm_remove_time_event(mvm, mvmvif,
1675                                           &mvmvif->time_event_data);
1676         }
1677
1678         if (changes & BSS_CHANGED_BEACON_INFO) {
1679                 iwl_mvm_sf_update(mvm, vif, false);
1680                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1681         }
1682
1683         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1684                 ret = iwl_mvm_power_update_mac(mvm);
1685                 if (ret)
1686                         IWL_ERR(mvm, "failed to update power mode\n");
1687         }
1688
1689         if (changes & BSS_CHANGED_TXPOWER) {
1690                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1691                                 bss_conf->txpower);
1692                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1693         }
1694
1695         if (changes & BSS_CHANGED_CQM) {
1696                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1697                 /* reset cqm events tracking */
1698                 mvmvif->bf_data.last_cqm_event = 0;
1699                 if (mvmvif->bf_data.bf_enabled) {
1700                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1701                         if (ret)
1702                                 IWL_ERR(mvm,
1703                                         "failed to update CQM thresholds\n");
1704                 }
1705         }
1706
1707         if (changes & BSS_CHANGED_ARP_FILTER) {
1708                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1709                 iwl_mvm_configure_bcast_filter(mvm, vif);
1710         }
1711 }
1712
1713 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1714                                  struct ieee80211_vif *vif)
1715 {
1716         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1717         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1718         int ret;
1719
1720         /*
1721          * iwl_mvm_mac_ctxt_add() might read directly from the device
1722          * (the system time), so make sure it is available.
1723          */
1724         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1725         if (ret)
1726                 return ret;
1727
1728         mutex_lock(&mvm->mutex);
1729
1730         /* Send the beacon template */
1731         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1732         if (ret)
1733                 goto out_unlock;
1734
1735         /*
1736          * Re-calculate the tsf id, as the master-slave relations depend on the
1737          * beacon interval, which was not known when the AP interface was added.
1738          */
1739         if (vif->type == NL80211_IFTYPE_AP)
1740                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1741
1742         /* Add the mac context */
1743         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1744         if (ret)
1745                 goto out_unlock;
1746
1747         /* Perform the binding */
1748         ret = iwl_mvm_binding_add_vif(mvm, vif);
1749         if (ret)
1750                 goto out_remove;
1751
1752         /* Send the bcast station. At this stage the TBTT and DTIM time events
1753          * are added and applied to the scheduler */
1754         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1755         if (ret)
1756                 goto out_unbind;
1757
1758         /* must be set before quota calculations */
1759         mvmvif->ap_ibss_active = true;
1760
1761         /* power updated needs to be done before quotas */
1762         iwl_mvm_power_update_mac(mvm);
1763
1764         ret = iwl_mvm_update_quotas(mvm, NULL);
1765         if (ret)
1766                 goto out_quota_failed;
1767
1768         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1769         if (vif->p2p && mvm->p2p_device_vif)
1770                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1771
1772         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1773
1774         iwl_mvm_bt_coex_vif_change(mvm);
1775
1776         /* we don't support TDLS during DCM */
1777         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1778                 iwl_mvm_teardown_tdls_peers(mvm);
1779
1780         mutex_unlock(&mvm->mutex);
1781         return 0;
1782
1783 out_quota_failed:
1784         iwl_mvm_power_update_mac(mvm);
1785         mvmvif->ap_ibss_active = false;
1786         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1787 out_unbind:
1788         iwl_mvm_binding_remove_vif(mvm, vif);
1789 out_remove:
1790         iwl_mvm_mac_ctxt_remove(mvm, vif);
1791 out_unlock:
1792         mutex_unlock(&mvm->mutex);
1793         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1794         return ret;
1795 }
1796
1797 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1798                                  struct ieee80211_vif *vif)
1799 {
1800         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1801         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1802
1803         iwl_mvm_prepare_mac_removal(mvm, vif);
1804
1805         mutex_lock(&mvm->mutex);
1806
1807         /* Handle AP stop while in CSA */
1808         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1809                 iwl_mvm_remove_time_event(mvm, mvmvif,
1810                                           &mvmvif->time_event_data);
1811                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1812         }
1813
1814         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1815                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1816                 mvm->csa_tx_block_bcn_timeout = 0;
1817         }
1818
1819         mvmvif->ap_ibss_active = false;
1820         mvm->ap_last_beacon_gp2 = 0;
1821
1822         iwl_mvm_bt_coex_vif_change(mvm);
1823
1824         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1825
1826         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1827         if (vif->p2p && mvm->p2p_device_vif)
1828                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1829
1830         iwl_mvm_update_quotas(mvm, NULL);
1831         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1832         iwl_mvm_binding_remove_vif(mvm, vif);
1833
1834         iwl_mvm_power_update_mac(mvm);
1835
1836         iwl_mvm_mac_ctxt_remove(mvm, vif);
1837
1838         mutex_unlock(&mvm->mutex);
1839 }
1840
1841 static void
1842 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1843                                  struct ieee80211_vif *vif,
1844                                  struct ieee80211_bss_conf *bss_conf,
1845                                  u32 changes)
1846 {
1847         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1848
1849         /* Changes will be applied when the AP/IBSS is started */
1850         if (!mvmvif->ap_ibss_active)
1851                 return;
1852
1853         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1854                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1855             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1856                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1857
1858         /* Need to send a new beacon template to the FW */
1859         if (changes & BSS_CHANGED_BEACON &&
1860             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1861                 IWL_WARN(mvm, "Failed updating beacon data\n");
1862
1863         if (changes & BSS_CHANGED_TXPOWER) {
1864                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1865                                 bss_conf->txpower);
1866                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1867         }
1868
1869 }
1870
1871 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1872                                      struct ieee80211_vif *vif,
1873                                      struct ieee80211_bss_conf *bss_conf,
1874                                      u32 changes)
1875 {
1876         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1877
1878         /*
1879          * iwl_mvm_bss_info_changed_station() might call
1880          * iwl_mvm_protect_session(), which reads directly from
1881          * the device (the system time), so make sure it is available.
1882          */
1883         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1884                 return;
1885
1886         mutex_lock(&mvm->mutex);
1887
1888         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1889                 iwl_mvm_scan_offload_stop(mvm, true);
1890
1891         switch (vif->type) {
1892         case NL80211_IFTYPE_STATION:
1893                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1894                 break;
1895         case NL80211_IFTYPE_AP:
1896         case NL80211_IFTYPE_ADHOC:
1897                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1898                 break;
1899         default:
1900                 /* shouldn't happen */
1901                 WARN_ON_ONCE(1);
1902         }
1903
1904         mutex_unlock(&mvm->mutex);
1905         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1906 }
1907
1908 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1909                                           enum iwl_scan_status scan_type)
1910 {
1911         int ret;
1912         bool wait_for_handlers = false;
1913
1914         mutex_lock(&mvm->mutex);
1915
1916         if (mvm->scan_status != scan_type) {
1917                 ret = 0;
1918                 /* make sure there are no pending notifications */
1919                 wait_for_handlers = true;
1920                 goto out;
1921         }
1922
1923         switch (scan_type) {
1924         case IWL_MVM_SCAN_SCHED:
1925                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1926                 break;
1927         case IWL_MVM_SCAN_OS:
1928                 ret = iwl_mvm_cancel_scan(mvm);
1929                 break;
1930         case IWL_MVM_SCAN_NONE:
1931         default:
1932                 WARN_ON_ONCE(1);
1933                 ret = -EINVAL;
1934                 break;
1935         }
1936         if (ret)
1937                 goto out;
1938
1939         wait_for_handlers = true;
1940 out:
1941         mutex_unlock(&mvm->mutex);
1942
1943         /* make sure we consume the completion notification */
1944         if (wait_for_handlers)
1945                 iwl_mvm_wait_for_async_handlers(mvm);
1946
1947         return ret;
1948 }
1949 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1950                                struct ieee80211_vif *vif,
1951                                struct ieee80211_scan_request *hw_req)
1952 {
1953         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1954         struct cfg80211_scan_request *req = &hw_req->req;
1955         int ret;
1956
1957         if (req->n_channels == 0 ||
1958             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1959                 return -EINVAL;
1960
1961         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1962                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1963                 if (ret)
1964                         return ret;
1965         }
1966
1967         mutex_lock(&mvm->mutex);
1968
1969         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1970                 ret = -EBUSY;
1971                 goto out;
1972         }
1973
1974         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1975
1976         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1977                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1978         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1979                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1980         else
1981                 ret = iwl_mvm_scan_request(mvm, vif, req);
1982
1983         if (ret)
1984                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1985 out:
1986         mutex_unlock(&mvm->mutex);
1987         return ret;
1988 }
1989
1990 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1991                                        struct ieee80211_vif *vif)
1992 {
1993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1994
1995         mutex_lock(&mvm->mutex);
1996
1997         iwl_mvm_cancel_scan(mvm);
1998
1999         mutex_unlock(&mvm->mutex);
2000 }
2001
2002 static void
2003 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2004                                   struct ieee80211_sta *sta, u16 tids,
2005                                   int num_frames,
2006                                   enum ieee80211_frame_release_type reason,
2007                                   bool more_data)
2008 {
2009         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2010
2011         /* Called when we need to transmit (a) frame(s) from mac80211 */
2012
2013         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2014                                           tids, more_data, false);
2015 }
2016
2017 static void
2018 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2019                                     struct ieee80211_sta *sta, u16 tids,
2020                                     int num_frames,
2021                                     enum ieee80211_frame_release_type reason,
2022                                     bool more_data)
2023 {
2024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2025
2026         /* Called when we need to transmit (a) frame(s) from agg queue */
2027
2028         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2029                                           tids, more_data, true);
2030 }
2031
2032 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2033                                    struct ieee80211_vif *vif,
2034                                    enum sta_notify_cmd cmd,
2035                                    struct ieee80211_sta *sta)
2036 {
2037         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2038         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2039         int tid;
2040
2041         switch (cmd) {
2042         case STA_NOTIFY_SLEEP:
2043                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2044                         ieee80211_sta_block_awake(hw, sta, true);
2045                 spin_lock_bh(&mvmsta->lock);
2046                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2047                         struct iwl_mvm_tid_data *tid_data;
2048
2049                         tid_data = &mvmsta->tid_data[tid];
2050                         if (tid_data->state != IWL_AGG_ON &&
2051                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2052                                 continue;
2053                         if (iwl_mvm_tid_queued(tid_data) == 0)
2054                                 continue;
2055                         ieee80211_sta_set_buffered(sta, tid, true);
2056                 }
2057                 spin_unlock_bh(&mvmsta->lock);
2058                 /*
2059                  * The fw updates the STA to be asleep. Tx packets on the Tx
2060                  * queues to this station will not be transmitted. The fw will
2061                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2062                  */
2063                 break;
2064         case STA_NOTIFY_AWAKE:
2065                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2066                         break;
2067                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2068                 break;
2069         default:
2070                 break;
2071         }
2072 }
2073
2074 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2075                                        struct ieee80211_vif *vif,
2076                                        struct ieee80211_sta *sta)
2077 {
2078         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2079         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2080
2081         /*
2082          * This is called before mac80211 does RCU synchronisation,
2083          * so here we already invalidate our internal RCU-protected
2084          * station pointer. The rest of the code will thus no longer
2085          * be able to find the station this way, and we don't rely
2086          * on further RCU synchronisation after the sta_state()
2087          * callback deleted the station.
2088          */
2089         mutex_lock(&mvm->mutex);
2090         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2091                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2092                                    ERR_PTR(-ENOENT));
2093         mutex_unlock(&mvm->mutex);
2094 }
2095
2096 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2097                                  struct ieee80211_vif *vif,
2098                                  struct ieee80211_sta *sta,
2099                                  enum ieee80211_sta_state old_state,
2100                                  enum ieee80211_sta_state new_state)
2101 {
2102         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2104         int ret;
2105
2106         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2107                            sta->addr, old_state, new_state);
2108
2109         /* this would be a mac80211 bug ... but don't crash */
2110         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2111                 return -EINVAL;
2112
2113         /* if a STA is being removed, reuse its ID */
2114         flush_work(&mvm->sta_drained_wk);
2115
2116         mutex_lock(&mvm->mutex);
2117         if (old_state == IEEE80211_STA_NOTEXIST &&
2118             new_state == IEEE80211_STA_NONE) {
2119                 /*
2120                  * Firmware bug - it'll crash if the beacon interval is less
2121                  * than 16. We can't avoid connecting at all, so refuse the
2122                  * station state change, this will cause mac80211 to abandon
2123                  * attempts to connect to this AP, and eventually wpa_s will
2124                  * blacklist the AP...
2125                  */
2126                 if (vif->type == NL80211_IFTYPE_STATION &&
2127                     vif->bss_conf.beacon_int < 16) {
2128                         IWL_ERR(mvm,
2129                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2130                                 sta->addr, vif->bss_conf.beacon_int);
2131                         ret = -EINVAL;
2132                         goto out_unlock;
2133                 }
2134
2135                 if (sta->tdls &&
2136                     (vif->p2p ||
2137                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2138                                                 IWL_MVM_TDLS_STA_COUNT ||
2139                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2140                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2141                         ret = -EBUSY;
2142                         goto out_unlock;
2143                 }
2144
2145                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2146                 if (sta->tdls && ret == 0)
2147                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2148         } else if (old_state == IEEE80211_STA_NONE &&
2149                    new_state == IEEE80211_STA_AUTH) {
2150                 /*
2151                  * EBS may be disabled due to previous failures reported by FW.
2152                  * Reset EBS status here assuming environment has been changed.
2153                  */
2154                 mvm->last_ebs_successful = true;
2155                 ret = 0;
2156         } else if (old_state == IEEE80211_STA_AUTH &&
2157                    new_state == IEEE80211_STA_ASSOC) {
2158                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2159                 if (ret == 0)
2160                         iwl_mvm_rs_rate_init(mvm, sta,
2161                                              mvmvif->phy_ctxt->channel->band,
2162                                              true);
2163         } else if (old_state == IEEE80211_STA_ASSOC &&
2164                    new_state == IEEE80211_STA_AUTHORIZED) {
2165
2166                 /* we don't support TDLS during DCM */
2167                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2168                         iwl_mvm_teardown_tdls_peers(mvm);
2169
2170                 /* enable beacon filtering */
2171                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2172                 ret = 0;
2173         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2174                    new_state == IEEE80211_STA_ASSOC) {
2175                 /* disable beacon filtering */
2176                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2177                 ret = 0;
2178         } else if (old_state == IEEE80211_STA_ASSOC &&
2179                    new_state == IEEE80211_STA_AUTH) {
2180                 ret = 0;
2181         } else if (old_state == IEEE80211_STA_AUTH &&
2182                    new_state == IEEE80211_STA_NONE) {
2183                 ret = 0;
2184         } else if (old_state == IEEE80211_STA_NONE &&
2185                    new_state == IEEE80211_STA_NOTEXIST) {
2186                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2187                 if (sta->tdls)
2188                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2189         } else {
2190                 ret = -EIO;
2191         }
2192  out_unlock:
2193         mutex_unlock(&mvm->mutex);
2194
2195         if (sta->tdls && ret == 0) {
2196                 if (old_state == IEEE80211_STA_NOTEXIST &&
2197                     new_state == IEEE80211_STA_NONE)
2198                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2199                 else if (old_state == IEEE80211_STA_NONE &&
2200                          new_state == IEEE80211_STA_NOTEXIST)
2201                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2202         }
2203
2204         return ret;
2205 }
2206
2207 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2208 {
2209         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2210
2211         mvm->rts_threshold = value;
2212
2213         return 0;
2214 }
2215
2216 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2217                                   struct ieee80211_vif *vif,
2218                                   struct ieee80211_sta *sta, u32 changed)
2219 {
2220         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2221
2222         if (vif->type == NL80211_IFTYPE_STATION &&
2223             changed & IEEE80211_RC_NSS_CHANGED)
2224                 iwl_mvm_sf_update(mvm, vif, false);
2225 }
2226
2227 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2228                                struct ieee80211_vif *vif, u16 ac,
2229                                const struct ieee80211_tx_queue_params *params)
2230 {
2231         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2232         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2233
2234         mvmvif->queue_params[ac] = *params;
2235
2236         /*
2237          * No need to update right away, we'll get BSS_CHANGED_QOS
2238          * The exception is P2P_DEVICE interface which needs immediate update.
2239          */
2240         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2241                 int ret;
2242
2243                 mutex_lock(&mvm->mutex);
2244                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2245                 mutex_unlock(&mvm->mutex);
2246                 return ret;
2247         }
2248         return 0;
2249 }
2250
2251 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2252                                       struct ieee80211_vif *vif)
2253 {
2254         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2255         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2256                            200 + vif->bss_conf.beacon_int);
2257         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2258                                100 + vif->bss_conf.beacon_int);
2259
2260         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2261                 return;
2262
2263         /*
2264          * iwl_mvm_protect_session() reads directly from the device
2265          * (the system time), so make sure it is available.
2266          */
2267         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2268                 return;
2269
2270         mutex_lock(&mvm->mutex);
2271         /* Try really hard to protect the session and hear a beacon */
2272         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2273         mutex_unlock(&mvm->mutex);
2274
2275         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2276 }
2277
2278 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2279                                         struct ieee80211_vif *vif,
2280                                         struct cfg80211_sched_scan_request *req,
2281                                         struct ieee80211_scan_ies *ies)
2282 {
2283         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2284         int ret;
2285
2286         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2287                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2288                 if (ret)
2289                         return ret;
2290         }
2291
2292         mutex_lock(&mvm->mutex);
2293
2294         /* Newest FW fixes sched scan while connected on another interface */
2295         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2296                 if (!vif->bss_conf.idle) {
2297                         ret = -EBUSY;
2298                         goto out;
2299                 }
2300         } else if (!iwl_mvm_is_idle(mvm)) {
2301                 ret = -EBUSY;
2302                 goto out;
2303         }
2304
2305         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2306                 ret = -EBUSY;
2307                 goto out;
2308         }
2309
2310         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2311         if (ret)
2312                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2313
2314 out:
2315         mutex_unlock(&mvm->mutex);
2316         return ret;
2317 }
2318
2319 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2320                                        struct ieee80211_vif *vif)
2321 {
2322         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2323         int ret;
2324
2325         mutex_lock(&mvm->mutex);
2326         ret = iwl_mvm_scan_offload_stop(mvm, false);
2327         mutex_unlock(&mvm->mutex);
2328         iwl_mvm_wait_for_async_handlers(mvm);
2329
2330         return ret;
2331
2332 }
2333
2334 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2335                                enum set_key_cmd cmd,
2336                                struct ieee80211_vif *vif,
2337                                struct ieee80211_sta *sta,
2338                                struct ieee80211_key_conf *key)
2339 {
2340         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2341         int ret;
2342
2343         if (iwlwifi_mod_params.sw_crypto) {
2344                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2345                 return -EOPNOTSUPP;
2346         }
2347
2348         switch (key->cipher) {
2349         case WLAN_CIPHER_SUITE_TKIP:
2350                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2351                 /* fall-through */
2352         case WLAN_CIPHER_SUITE_CCMP:
2353                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2354                 break;
2355         case WLAN_CIPHER_SUITE_AES_CMAC:
2356                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2357                 break;
2358         case WLAN_CIPHER_SUITE_WEP40:
2359         case WLAN_CIPHER_SUITE_WEP104:
2360                 /* For non-client mode, only use WEP keys for TX as we probably
2361                  * don't have a station yet anyway and would then have to keep
2362                  * track of the keys, linking them to each of the clients/peers
2363                  * as they appear. For now, don't do that, for performance WEP
2364                  * offload doesn't really matter much, but we need it for some
2365                  * other offload features in client mode.
2366                  */
2367                 if (vif->type != NL80211_IFTYPE_STATION)
2368                         return 0;
2369                 break;
2370         default:
2371                 /* currently FW supports only one optional cipher scheme */
2372                 if (hw->n_cipher_schemes &&
2373                     hw->cipher_schemes->cipher == key->cipher)
2374                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2375                 else
2376                         return -EOPNOTSUPP;
2377         }
2378
2379         mutex_lock(&mvm->mutex);
2380
2381         switch (cmd) {
2382         case SET_KEY:
2383                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2384                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2385                         /*
2386                          * GTK on AP interface is a TX-only key, return 0;
2387                          * on IBSS they're per-station and because we're lazy
2388                          * we don't support them for RX, so do the same.
2389                          */
2390                         ret = 0;
2391                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2392                         break;
2393                 }
2394
2395                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2396                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2397                 if (ret) {
2398                         IWL_WARN(mvm, "set key failed\n");
2399                         /*
2400                          * can't add key for RX, but we don't need it
2401                          * in the device for TX so still return 0
2402                          */
2403                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2404                         ret = 0;
2405                 }
2406
2407                 break;
2408         case DISABLE_KEY:
2409                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2410                         ret = 0;
2411                         break;
2412                 }
2413
2414                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2415                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2416                 break;
2417         default:
2418                 ret = -EINVAL;
2419         }
2420
2421         mutex_unlock(&mvm->mutex);
2422         return ret;
2423 }
2424
2425 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2426                                         struct ieee80211_vif *vif,
2427                                         struct ieee80211_key_conf *keyconf,
2428                                         struct ieee80211_sta *sta,
2429                                         u32 iv32, u16 *phase1key)
2430 {
2431         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2432
2433         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2434                 return;
2435
2436         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2437 }
2438
2439
2440 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2441                                struct iwl_rx_packet *pkt, void *data)
2442 {
2443         struct iwl_mvm *mvm =
2444                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2445         struct iwl_hs20_roc_res *resp;
2446         int resp_len = iwl_rx_packet_payload_len(pkt);
2447         struct iwl_mvm_time_event_data *te_data = data;
2448
2449         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2450                 return true;
2451
2452         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2453                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2454                 return true;
2455         }
2456
2457         resp = (void *)pkt->data;
2458
2459         IWL_DEBUG_TE(mvm,
2460                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2461                      resp->status, resp->event_unique_id);
2462
2463         te_data->uid = le32_to_cpu(resp->event_unique_id);
2464         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2465                      te_data->uid);
2466
2467         spin_lock_bh(&mvm->time_event_lock);
2468         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2469         spin_unlock_bh(&mvm->time_event_lock);
2470
2471         return true;
2472 }
2473
2474 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2475 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2476                                     struct ieee80211_channel *channel,
2477                                     struct ieee80211_vif *vif,
2478                                     int duration)
2479 {
2480         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2481         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2482         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2483         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2484         struct iwl_notification_wait wait_time_event;
2485         struct iwl_hs20_roc_req aux_roc_req = {
2486                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2487                 .id_and_color =
2488                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2489                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2490                 /* Set the channel info data */
2491                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2492                         PHY_BAND_24 : PHY_BAND_5,
2493                 .channel_info.channel = channel->hw_value,
2494                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2495                 /* Set the time and duration */
2496                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2497                 .apply_time_max_delay =
2498                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2499                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2500          };
2501
2502         /* Set the node address */
2503         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2504
2505         lockdep_assert_held(&mvm->mutex);
2506
2507         spin_lock_bh(&mvm->time_event_lock);
2508
2509         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2510                 spin_unlock_bh(&mvm->time_event_lock);
2511                 return -EIO;
2512         }
2513
2514         te_data->vif = vif;
2515         te_data->duration = duration;
2516         te_data->id = HOT_SPOT_CMD;
2517
2518         spin_unlock_bh(&mvm->time_event_lock);
2519
2520         /*
2521          * Use a notification wait, which really just processes the
2522          * command response and doesn't wait for anything, in order
2523          * to be able to process the response and get the UID inside
2524          * the RX path. Using CMD_WANT_SKB doesn't work because it
2525          * stores the buffer and then wakes up this thread, by which
2526          * time another notification (that the time event started)
2527          * might already be processed unsuccessfully.
2528          */
2529         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2530                                    time_event_response,
2531                                    ARRAY_SIZE(time_event_response),
2532                                    iwl_mvm_rx_aux_roc, te_data);
2533
2534         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2535                                    &aux_roc_req);
2536
2537         if (res) {
2538                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2539                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2540                 goto out_clear_te;
2541         }
2542
2543         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2544         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2545         /* should never fail */
2546         WARN_ON_ONCE(res);
2547
2548         if (res) {
2549  out_clear_te:
2550                 spin_lock_bh(&mvm->time_event_lock);
2551                 iwl_mvm_te_clear_data(mvm, te_data);
2552                 spin_unlock_bh(&mvm->time_event_lock);
2553         }
2554
2555         return res;
2556 }
2557
2558 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2559                        struct ieee80211_vif *vif,
2560                        struct ieee80211_channel *channel,
2561                        int duration,
2562                        enum ieee80211_roc_type type)
2563 {
2564         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2565         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2566         struct cfg80211_chan_def chandef;
2567         struct iwl_mvm_phy_ctxt *phy_ctxt;
2568         int ret, i;
2569
2570         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2571                            duration, type);
2572
2573         mutex_lock(&mvm->mutex);
2574
2575         switch (vif->type) {
2576         case NL80211_IFTYPE_STATION:
2577                 if (mvm->fw->ucode_capa.capa[0] &
2578                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2579                         /* Use aux roc framework (HS20) */
2580                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2581                                                        vif, duration);
2582                         goto out_unlock;
2583                 }
2584                 IWL_ERR(mvm, "hotspot not supported\n");
2585                 ret = -EINVAL;
2586                 goto out_unlock;
2587         case NL80211_IFTYPE_P2P_DEVICE:
2588                 /* handle below */
2589                 break;
2590         default:
2591                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2592                 ret = -EINVAL;
2593                 goto out_unlock;
2594         }
2595
2596         for (i = 0; i < NUM_PHY_CTX; i++) {
2597                 phy_ctxt = &mvm->phy_ctxts[i];
2598                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2599                         continue;
2600
2601                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2602                         /*
2603                          * Unbind the P2P_DEVICE from the current PHY context,
2604                          * and if the PHY context is not used remove it.
2605                          */
2606                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2607                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2608                                 goto out_unlock;
2609
2610                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2611
2612                         /* Bind the P2P_DEVICE to the current PHY Context */
2613                         mvmvif->phy_ctxt = phy_ctxt;
2614
2615                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2616                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2617                                 goto out_unlock;
2618
2619                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2620                         goto schedule_time_event;
2621                 }
2622         }
2623
2624         /* Need to update the PHY context only if the ROC channel changed */
2625         if (channel == mvmvif->phy_ctxt->channel)
2626                 goto schedule_time_event;
2627
2628         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2629
2630         /*
2631          * Change the PHY context configuration as it is currently referenced
2632          * only by the P2P Device MAC
2633          */
2634         if (mvmvif->phy_ctxt->ref == 1) {
2635                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2636                                                &chandef, 1, 1);
2637                 if (ret)
2638                         goto out_unlock;
2639         } else {
2640                 /*
2641                  * The PHY context is shared with other MACs. Need to remove the
2642                  * P2P Device from the binding, allocate an new PHY context and
2643                  * create a new binding
2644                  */
2645                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2646                 if (!phy_ctxt) {
2647                         ret = -ENOSPC;
2648                         goto out_unlock;
2649                 }
2650
2651                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2652                                                1, 1);
2653                 if (ret) {
2654                         IWL_ERR(mvm, "Failed to change PHY context\n");
2655                         goto out_unlock;
2656                 }
2657
2658                 /* Unbind the P2P_DEVICE from the current PHY context */
2659                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2660                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2661                         goto out_unlock;
2662
2663                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2664
2665                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2666                 mvmvif->phy_ctxt = phy_ctxt;
2667
2668                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2669                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2670                         goto out_unlock;
2671
2672                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2673         }
2674
2675 schedule_time_event:
2676         /* Schedule the time events */
2677         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2678
2679 out_unlock:
2680         mutex_unlock(&mvm->mutex);
2681         IWL_DEBUG_MAC80211(mvm, "leave\n");
2682         return ret;
2683 }
2684
2685 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2686 {
2687         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2688
2689         IWL_DEBUG_MAC80211(mvm, "enter\n");
2690
2691         mutex_lock(&mvm->mutex);
2692         iwl_mvm_stop_roc(mvm);
2693         mutex_unlock(&mvm->mutex);
2694
2695         IWL_DEBUG_MAC80211(mvm, "leave\n");
2696         return 0;
2697 }
2698
2699 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2700                                  struct ieee80211_chanctx_conf *ctx)
2701 {
2702         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2703         struct iwl_mvm_phy_ctxt *phy_ctxt;
2704         int ret;
2705
2706         lockdep_assert_held(&mvm->mutex);
2707
2708         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2709
2710         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2711         if (!phy_ctxt) {
2712                 ret = -ENOSPC;
2713                 goto out;
2714         }
2715
2716         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2717                                        ctx->rx_chains_static,
2718                                        ctx->rx_chains_dynamic);
2719         if (ret) {
2720                 IWL_ERR(mvm, "Failed to add PHY context\n");
2721                 goto out;
2722         }
2723
2724         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2725         *phy_ctxt_id = phy_ctxt->id;
2726 out:
2727         return ret;
2728 }
2729
2730 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2731                                struct ieee80211_chanctx_conf *ctx)
2732 {
2733         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2734         int ret;
2735
2736         mutex_lock(&mvm->mutex);
2737         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2738         mutex_unlock(&mvm->mutex);
2739
2740         return ret;
2741 }
2742
2743 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2744                                      struct ieee80211_chanctx_conf *ctx)
2745 {
2746         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2747         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2748
2749         lockdep_assert_held(&mvm->mutex);
2750
2751         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2752 }
2753
2754 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2755                                    struct ieee80211_chanctx_conf *ctx)
2756 {
2757         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2758
2759         mutex_lock(&mvm->mutex);
2760         __iwl_mvm_remove_chanctx(mvm, ctx);
2761         mutex_unlock(&mvm->mutex);
2762 }
2763
2764 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2765                                    struct ieee80211_chanctx_conf *ctx,
2766                                    u32 changed)
2767 {
2768         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2769         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2770         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2771
2772         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2773                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2774                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2775                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2776                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2777                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2778                       phy_ctxt->ref, changed))
2779                 return;
2780
2781         mutex_lock(&mvm->mutex);
2782         iwl_mvm_bt_coex_vif_change(mvm);
2783         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2784                                  ctx->rx_chains_static,
2785                                  ctx->rx_chains_dynamic);
2786         mutex_unlock(&mvm->mutex);
2787 }
2788
2789 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2790                                         struct ieee80211_vif *vif,
2791                                         struct ieee80211_chanctx_conf *ctx,
2792                                         bool switching_chanctx)
2793 {
2794         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2795         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2796         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2797         int ret;
2798
2799         lockdep_assert_held(&mvm->mutex);
2800
2801         mvmvif->phy_ctxt = phy_ctxt;
2802
2803         switch (vif->type) {
2804         case NL80211_IFTYPE_AP:
2805                 /* only needed if we're switching chanctx (i.e. during CSA) */
2806                 if (switching_chanctx) {
2807                         mvmvif->ap_ibss_active = true;
2808                         break;
2809                 }
2810         case NL80211_IFTYPE_ADHOC:
2811                 /*
2812                  * The AP binding flow is handled as part of the start_ap flow
2813                  * (in bss_info_changed), similarly for IBSS.
2814                  */
2815                 ret = 0;
2816                 goto out;
2817         case NL80211_IFTYPE_STATION:
2818                 break;
2819         case NL80211_IFTYPE_MONITOR:
2820                 /* always disable PS when a monitor interface is active */
2821                 mvmvif->ps_disabled = true;
2822                 break;
2823         default:
2824                 ret = -EINVAL;
2825                 goto out;
2826         }
2827
2828         ret = iwl_mvm_binding_add_vif(mvm, vif);
2829         if (ret)
2830                 goto out;
2831
2832         /*
2833          * Power state must be updated before quotas,
2834          * otherwise fw will complain.
2835          */
2836         iwl_mvm_power_update_mac(mvm);
2837
2838         /* Setting the quota at this stage is only required for monitor
2839          * interfaces. For the other types, the bss_info changed flow
2840          * will handle quota settings.
2841          */
2842         if (vif->type == NL80211_IFTYPE_MONITOR) {
2843                 mvmvif->monitor_active = true;
2844                 ret = iwl_mvm_update_quotas(mvm, NULL);
2845                 if (ret)
2846                         goto out_remove_binding;
2847         }
2848
2849         /* Handle binding during CSA */
2850         if (vif->type == NL80211_IFTYPE_AP) {
2851                 iwl_mvm_update_quotas(mvm, NULL);
2852                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2853         }
2854
2855         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
2856                 u32 duration = 2 * vif->bss_conf.beacon_int;
2857
2858                 /* iwl_mvm_protect_session() reads directly from the
2859                  * device (the system time), so make sure it is
2860                  * available.
2861                  */
2862                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
2863                 if (ret)
2864                         goto out_remove_binding;
2865
2866                 /* Protect the session to make sure we hear the first
2867                  * beacon on the new channel.
2868                  */
2869                 iwl_mvm_protect_session(mvm, vif, duration, duration,
2870                                         vif->bss_conf.beacon_int / 2,
2871                                         true);
2872
2873                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
2874
2875                 iwl_mvm_update_quotas(mvm, NULL);
2876         }
2877
2878         goto out;
2879
2880 out_remove_binding:
2881         iwl_mvm_binding_remove_vif(mvm, vif);
2882         iwl_mvm_power_update_mac(mvm);
2883 out:
2884         if (ret)
2885                 mvmvif->phy_ctxt = NULL;
2886         return ret;
2887 }
2888 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2889                                       struct ieee80211_vif *vif,
2890                                       struct ieee80211_chanctx_conf *ctx)
2891 {
2892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2893         int ret;
2894
2895         mutex_lock(&mvm->mutex);
2896         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2897         mutex_unlock(&mvm->mutex);
2898
2899         return ret;
2900 }
2901
2902 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2903                                            struct ieee80211_vif *vif,
2904                                            struct ieee80211_chanctx_conf *ctx,
2905                                            bool switching_chanctx)
2906 {
2907         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2908         struct ieee80211_vif *disabled_vif = NULL;
2909
2910         lockdep_assert_held(&mvm->mutex);
2911
2912         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2913
2914         switch (vif->type) {
2915         case NL80211_IFTYPE_ADHOC:
2916                 goto out;
2917         case NL80211_IFTYPE_MONITOR:
2918                 mvmvif->monitor_active = false;
2919                 mvmvif->ps_disabled = false;
2920                 break;
2921         case NL80211_IFTYPE_AP:
2922                 /* This part is triggered only during CSA */
2923                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
2924                         goto out;
2925
2926                 mvmvif->csa_countdown = false;
2927
2928                 /* Set CS bit on all the stations */
2929                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2930
2931                 /* Save blocked iface, the timeout is set on the next beacon */
2932                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2933
2934                 mvmvif->ap_ibss_active = false;
2935                 break;
2936         case NL80211_IFTYPE_STATION:
2937                 if (!switching_chanctx)
2938                         break;
2939
2940                 disabled_vif = vif;
2941
2942                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2943                 break;
2944         default:
2945                 break;
2946         }
2947
2948         iwl_mvm_update_quotas(mvm, disabled_vif);
2949         iwl_mvm_binding_remove_vif(mvm, vif);
2950
2951 out:
2952         mvmvif->phy_ctxt = NULL;
2953         iwl_mvm_power_update_mac(mvm);
2954 }
2955
2956 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2957                                          struct ieee80211_vif *vif,
2958                                          struct ieee80211_chanctx_conf *ctx)
2959 {
2960         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2961
2962         mutex_lock(&mvm->mutex);
2963         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2964         mutex_unlock(&mvm->mutex);
2965 }
2966
2967 static int
2968 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
2969                                 struct ieee80211_vif_chanctx_switch *vifs)
2970 {
2971         int ret;
2972
2973         mutex_lock(&mvm->mutex);
2974         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2975         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2976
2977         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2978         if (ret) {
2979                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2980                 goto out_reassign;
2981         }
2982
2983         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2984                                            true);
2985         if (ret) {
2986                 IWL_ERR(mvm,
2987                         "failed to assign new_ctx during channel switch\n");
2988                 goto out_remove;
2989         }
2990
2991         /* we don't support TDLS during DCM - can be caused by channel switch */
2992         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2993                 iwl_mvm_teardown_tdls_peers(mvm);
2994
2995         goto out;
2996
2997 out_remove:
2998         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2999
3000 out_reassign:
3001         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3002                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3003                 goto out_restart;
3004         }
3005
3006         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3007                                          true)) {
3008                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3009                 goto out_restart;
3010         }
3011
3012         goto out;
3013
3014 out_restart:
3015         /* things keep failing, better restart the hw */
3016         iwl_mvm_nic_restart(mvm, false);
3017
3018 out:
3019         mutex_unlock(&mvm->mutex);
3020
3021         return ret;
3022 }
3023
3024 static int
3025 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3026                                     struct ieee80211_vif_chanctx_switch *vifs)
3027 {
3028         int ret;
3029
3030         mutex_lock(&mvm->mutex);
3031         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3032
3033         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3034                                            true);
3035         if (ret) {
3036                 IWL_ERR(mvm,
3037                         "failed to assign new_ctx during channel switch\n");
3038                 goto out_reassign;
3039         }
3040
3041         goto out;
3042
3043 out_reassign:
3044         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3045                                          true)) {
3046                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3047                 goto out_restart;
3048         }
3049
3050         goto out;
3051
3052 out_restart:
3053         /* things keep failing, better restart the hw */
3054         iwl_mvm_nic_restart(mvm, false);
3055
3056 out:
3057         mutex_unlock(&mvm->mutex);
3058
3059         return ret;
3060 }
3061
3062 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3063                                       struct ieee80211_vif_chanctx_switch *vifs,
3064                                       int n_vifs,
3065                                       enum ieee80211_chanctx_switch_mode mode)
3066 {
3067         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3068         int ret;
3069
3070         /* we only support a single-vif right now */
3071         if (n_vifs > 1)
3072                 return -EOPNOTSUPP;
3073
3074         switch (mode) {
3075         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3076                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3077                 break;
3078         case CHANCTX_SWMODE_REASSIGN_VIF:
3079                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3080                 break;
3081         default:
3082                 ret = -EOPNOTSUPP;
3083                 break;
3084         }
3085
3086         return ret;
3087 }
3088
3089 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3090                            struct ieee80211_sta *sta,
3091                            bool set)
3092 {
3093         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3094         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3095
3096         if (!mvm_sta || !mvm_sta->vif) {
3097                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3098                 return -EINVAL;
3099         }
3100
3101         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3102 }
3103
3104 #ifdef CONFIG_NL80211_TESTMODE
3105 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3106         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3107         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3108         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3109 };
3110
3111 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3112                                       struct ieee80211_vif *vif,
3113                                       void *data, int len)
3114 {
3115         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3116         int err;
3117         u32 noa_duration;
3118
3119         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3120         if (err)
3121                 return err;
3122
3123         if (!tb[IWL_MVM_TM_ATTR_CMD])
3124                 return -EINVAL;
3125
3126         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3127         case IWL_MVM_TM_CMD_SET_NOA:
3128                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3129                     !vif->bss_conf.enable_beacon ||
3130                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3131                         return -EINVAL;
3132
3133                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3134                 if (noa_duration >= vif->bss_conf.beacon_int)
3135                         return -EINVAL;
3136
3137                 mvm->noa_duration = noa_duration;
3138                 mvm->noa_vif = vif;
3139
3140                 return iwl_mvm_update_quotas(mvm, NULL);
3141         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3142                 /* must be associated client vif - ignore authorized */
3143                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3144                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3145                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3146                         return -EINVAL;
3147
3148                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3149                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3150                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3151         }
3152
3153         return -EOPNOTSUPP;
3154 }
3155
3156 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3157                                     struct ieee80211_vif *vif,
3158                                     void *data, int len)
3159 {
3160         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3161         int err;
3162
3163         mutex_lock(&mvm->mutex);
3164         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3165         mutex_unlock(&mvm->mutex);
3166
3167         return err;
3168 }
3169 #endif
3170
3171 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3172                                    struct ieee80211_vif *vif,
3173                                    struct ieee80211_channel_switch *chsw)
3174 {
3175         /* By implementing this operation, we prevent mac80211 from
3176          * starting its own channel switch timer, so that we can call
3177          * ieee80211_chswitch_done() ourselves at the right time
3178          * (which is when the absence time event starts).
3179          */
3180
3181         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3182                            "dummy channel switch op\n");
3183 }
3184
3185 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3186                                       struct ieee80211_vif *vif,
3187                                       struct ieee80211_channel_switch *chsw)
3188 {
3189         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3190         struct ieee80211_vif *csa_vif;
3191         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3192         u32 apply_time;
3193         int ret;
3194
3195         mutex_lock(&mvm->mutex);
3196
3197         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3198                            chsw->chandef.center_freq1);
3199
3200         switch (vif->type) {
3201         case NL80211_IFTYPE_AP:
3202                 csa_vif =
3203                         rcu_dereference_protected(mvm->csa_vif,
3204                                                   lockdep_is_held(&mvm->mutex));
3205                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3206                               "Another CSA is already in progress")) {
3207                         ret = -EBUSY;
3208                         goto out_unlock;
3209                 }
3210
3211                 rcu_assign_pointer(mvm->csa_vif, vif);
3212
3213                 if (WARN_ONCE(mvmvif->csa_countdown,
3214                               "Previous CSA countdown didn't complete")) {
3215                         ret = -EBUSY;
3216                         goto out_unlock;
3217                 }
3218
3219                 break;
3220         case NL80211_IFTYPE_STATION:
3221                 /* Schedule the time event to a bit before beacon 1,
3222                  * to make sure we're in the new channel when the
3223                  * GO/AP arrives.
3224                  */
3225                 apply_time = chsw->device_timestamp +
3226                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3227                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3228
3229                 if (chsw->block_tx)
3230                         iwl_mvm_csa_client_absent(mvm, vif);
3231
3232                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3233                                             apply_time);
3234                 if (mvmvif->bf_data.bf_enabled) {
3235                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3236                         if (ret)
3237                                 goto out_unlock;
3238                 }
3239
3240                 break;
3241         default:
3242                 break;
3243         }
3244
3245         mvmvif->ps_disabled = true;
3246
3247         ret = iwl_mvm_power_update_ps(mvm);
3248         if (ret)
3249                 goto out_unlock;
3250
3251         /* we won't be on this channel any longer */
3252         iwl_mvm_teardown_tdls_peers(mvm);
3253
3254 out_unlock:
3255         mutex_unlock(&mvm->mutex);
3256
3257         return ret;
3258 }
3259
3260 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3261                                        struct ieee80211_vif *vif)
3262 {
3263         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3264         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3265         int ret;
3266
3267         mutex_lock(&mvm->mutex);
3268
3269         if (vif->type == NL80211_IFTYPE_STATION) {
3270                 struct iwl_mvm_sta *mvmsta;
3271
3272                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3273                                                           mvmvif->ap_sta_id);
3274
3275                 if (WARN_ON(!mvmsta)) {
3276                         ret = -EIO;
3277                         goto out_unlock;
3278                 }
3279
3280                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3281
3282                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3283
3284                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3285                 if (ret)
3286                         goto out_unlock;
3287
3288                 iwl_mvm_stop_session_protection(mvm, vif);
3289         }
3290
3291         mvmvif->ps_disabled = false;
3292
3293         ret = iwl_mvm_power_update_ps(mvm);
3294
3295 out_unlock:
3296         mutex_unlock(&mvm->mutex);
3297
3298         return ret;
3299 }
3300
3301 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3302                               struct ieee80211_vif *vif, u32 queues, bool drop)
3303 {
3304         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3305         struct iwl_mvm_vif *mvmvif;
3306         struct iwl_mvm_sta *mvmsta;
3307         struct ieee80211_sta *sta;
3308         int i;
3309         u32 msk = 0;
3310
3311         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3312                 return;
3313
3314         mutex_lock(&mvm->mutex);
3315         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3316
3317         /* flush the AP-station and all TDLS peers */
3318         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3319                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3320                                                 lockdep_is_held(&mvm->mutex));
3321                 if (IS_ERR_OR_NULL(sta))
3322                         continue;
3323
3324                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3325                 if (mvmsta->vif != vif)
3326                         continue;
3327
3328                 /* make sure only TDLS peers or the AP are flushed */
3329                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3330
3331                 msk |= mvmsta->tfd_queue_msk;
3332         }
3333
3334         if (drop) {
3335                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3336                         IWL_ERR(mvm, "flush request fail\n");
3337                 mutex_unlock(&mvm->mutex);
3338         } else {
3339                 mutex_unlock(&mvm->mutex);
3340
3341                 /* this can take a while, and we may need/want other operations
3342                  * to succeed while doing this, so do it without the mutex held
3343                  */
3344                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3345         }
3346 }
3347
3348 const struct ieee80211_ops iwl_mvm_hw_ops = {
3349         .tx = iwl_mvm_mac_tx,
3350         .ampdu_action = iwl_mvm_mac_ampdu_action,
3351         .start = iwl_mvm_mac_start,
3352         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3353         .stop = iwl_mvm_mac_stop,
3354         .add_interface = iwl_mvm_mac_add_interface,
3355         .remove_interface = iwl_mvm_mac_remove_interface,
3356         .config = iwl_mvm_mac_config,
3357         .prepare_multicast = iwl_mvm_prepare_multicast,
3358         .configure_filter = iwl_mvm_configure_filter,
3359         .bss_info_changed = iwl_mvm_bss_info_changed,
3360         .hw_scan = iwl_mvm_mac_hw_scan,
3361         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3362         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3363         .sta_state = iwl_mvm_mac_sta_state,
3364         .sta_notify = iwl_mvm_mac_sta_notify,
3365         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3366         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3367         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3368         .sta_rc_update = iwl_mvm_sta_rc_update,
3369         .conf_tx = iwl_mvm_mac_conf_tx,
3370         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3371         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3372         .flush = iwl_mvm_mac_flush,
3373         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3374         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3375         .set_key = iwl_mvm_mac_set_key,
3376         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3377         .remain_on_channel = iwl_mvm_roc,
3378         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3379         .add_chanctx = iwl_mvm_add_chanctx,
3380         .remove_chanctx = iwl_mvm_remove_chanctx,
3381         .change_chanctx = iwl_mvm_change_chanctx,
3382         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3383         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3384         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3385
3386         .start_ap = iwl_mvm_start_ap_ibss,
3387         .stop_ap = iwl_mvm_stop_ap_ibss,
3388         .join_ibss = iwl_mvm_start_ap_ibss,
3389         .leave_ibss = iwl_mvm_stop_ap_ibss,
3390
3391         .set_tim = iwl_mvm_set_tim,
3392
3393         .channel_switch = iwl_mvm_channel_switch,
3394         .pre_channel_switch = iwl_mvm_pre_channel_switch,
3395         .post_channel_switch = iwl_mvm_post_channel_switch,
3396
3397         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3398         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3399         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3400
3401         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3402
3403 #ifdef CONFIG_PM_SLEEP
3404         /* look at d3.c */
3405         .suspend = iwl_mvm_suspend,
3406         .resume = iwl_mvm_resume,
3407         .set_wakeup = iwl_mvm_set_wakeup,
3408         .set_rekey_data = iwl_mvm_set_rekey_data,
3409 #if IS_ENABLED(CONFIG_IPV6)
3410         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3411 #endif
3412         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3413 #endif
3414 };