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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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  39  * modification, are permitted provided that the following conditions
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  43  *    notice, this list of conditions and the following disclaimer.
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  46  *    the documentation and/or other materials provided with the
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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,
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  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 #include "iwl-csr.h"
  89
  90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_AP) |
  98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  99                         BIT(NL80211_IFTYPE_P2P_GO),
 100         },
 101         {
 102                 .max = 1,
 103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 104         },
 105 };
 106
 107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 108         {
 109                 .num_different_channels = 2,
 110                 .max_interfaces = 3,
 111                 .limits = iwl_mvm_limits,
 112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 113         },
 114 };
 115
 116 #ifdef CONFIG_PM_SLEEP
 117 static const struct nl80211_wowlan_tcp_data_token_feature
 118 iwl_mvm_wowlan_tcp_token_feature = {
 119         .min_len = 0,
 120         .max_len = 255,
 121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 122 };
 123
 124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 127                             sizeof(struct ethhdr) -
 128                             sizeof(struct iphdr) -
 129                             sizeof(struct tcphdr),
 130         .data_interval_max = 65535, /* __le16 in API */
 131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 132                             sizeof(struct ethhdr) -
 133                             sizeof(struct iphdr) -
 134                             sizeof(struct tcphdr),
 135         .seq = true,
 136 };
 137 #endif
 138
 139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 140 /*
 141  * Use the reserved field to indicate magic values.
 142  * these values will only be used internally by the driver,
 143  * and won't make it to the fw (reserved will be 0).
 144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 145  *      be the vif's ip address. in case there is not a single
 146  *      ip address (0, or more than 1), this attribute will
 147  *      be skipped.
 148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 149  *      the LSB bytes of the vif's mac address
 150  */
 151 enum {
 152         BC_FILTER_MAGIC_NONE = 0,
 153         BC_FILTER_MAGIC_IP,
 154         BC_FILTER_MAGIC_MAC,
 155 };
 156
 157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 158         {
 159                 /* arp */
 160                 .discard = 0,
 161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 162                 .attrs = {
 163                         {
 164                                 /* frame type - arp, hw type - ethernet */
 165                                 .offset_type =
 166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 167                                 .offset = sizeof(rfc1042_header),
 168                                 .val = cpu_to_be32(0x08060001),
 169                                 .mask = cpu_to_be32(0xffffffff),
 170                         },
 171                         {
 172                                 /* arp dest ip */
 173                                 .offset_type =
 174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 175                                 .offset = sizeof(rfc1042_header) + 2 +
 176                                           sizeof(struct arphdr) +
 177                                           ETH_ALEN + sizeof(__be32) +
 178                                           ETH_ALEN,
 179                                 .mask = cpu_to_be32(0xffffffff),
 180                                 /* mark it as special field */
 181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 182                         },
 183                 },
 184         },
 185         {
 186                 /* dhcp offer bcast */
 187                 .discard = 0,
 188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 189                 .attrs = {
 190                         {
 191                                 /* udp dest port - 68 (bootp client)*/
 192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 193                                 .offset = offsetof(struct udphdr, dest),
 194                                 .val = cpu_to_be32(0x00440000),
 195                                 .mask = cpu_to_be32(0xffff0000),
 196                         },
 197                         {
 198                                 /* dhcp - lsb bytes of client hw address */
 199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 200                                 .offset = 38,
 201                                 .mask = cpu_to_be32(0xffffffff),
 202                                 /* mark it as special field */
 203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 204                         },
 205                 },
 206         },
 207         /* last filter must be empty */
 208         {},
 209 };
 210 #endif
 211
 212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 213 {
 214         if (!iwl_mvm_is_d0i3_supported(mvm))
 215                 return;
 216
 217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 218         spin_lock_bh(&mvm->refs_lock);
 219         mvm->refs[ref_type]++;
 220         spin_unlock_bh(&mvm->refs_lock);
 221         iwl_trans_ref(mvm->trans);
 222 }
 223
 224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 225 {
 226         if (!iwl_mvm_is_d0i3_supported(mvm))
 227                 return;
 228
 229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 230         spin_lock_bh(&mvm->refs_lock);
 231         WARN_ON(!mvm->refs[ref_type]--);
 232         spin_unlock_bh(&mvm->refs_lock);
 233         iwl_trans_unref(mvm->trans);
 234 }
 235
 236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 237                                      enum iwl_mvm_ref_type except_ref)
 238 {
 239         int i, j;
 240
 241         if (!iwl_mvm_is_d0i3_supported(mvm))
 242                 return;
 243
 244         spin_lock_bh(&mvm->refs_lock);
 245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 246                 if (except_ref == i || !mvm->refs[i])
 247                         continue;
 248
 249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 250                               i, mvm->refs[i]);
 251                 for (j = 0; j < mvm->refs[i]; j++)
 252                         iwl_trans_unref(mvm->trans);
 253                 mvm->refs[i] = 0;
 254         }
 255         spin_unlock_bh(&mvm->refs_lock);
 256 }
 257
 258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 259 {
 260         int i;
 261         bool taken = false;
 262
 263         if (!iwl_mvm_is_d0i3_supported(mvm))
 264                 return true;
 265
 266         spin_lock_bh(&mvm->refs_lock);
 267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 268                 if (mvm->refs[i]) {
 269                         taken = true;
 270                         break;
 271                 }
 272         }
 273         spin_unlock_bh(&mvm->refs_lock);
 274
 275         return taken;
 276 }
 277
 278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 279 {
 280         iwl_mvm_ref(mvm, ref_type);
 281
 282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 284                                 HZ)) {
 285                 WARN_ON_ONCE(1);
 286                 iwl_mvm_unref(mvm, ref_type);
 287                 return -EIO;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 294 {
 295         int i;
 296
 297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 298         for (i = 0; i < NUM_PHY_CTX; i++) {
 299                 mvm->phy_ctxts[i].id = i;
 300                 mvm->phy_ctxts[i].ref = 0;
 301         }
 302 }
 303
 304 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 305 {
 306         struct ieee80211_hw *hw = mvm->hw;
 307         int num_mac, ret, i;
 308
 309         /* Tell mac80211 our characteristics */
 310         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 311                     IEEE80211_HW_SPECTRUM_MGMT |
 312                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 313                     IEEE80211_HW_QUEUE_CONTROL |
 314                     IEEE80211_HW_WANT_MONITOR_VIF |
 315                     IEEE80211_HW_SUPPORTS_PS |
 316                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 317                     IEEE80211_HW_AMPDU_AGGREGATION |
 318                     IEEE80211_HW_TIMING_BEACON_ONLY |
 319                     IEEE80211_HW_CONNECTION_MONITOR |
 320                     IEEE80211_HW_CHANCTX_STA_CSA |
 321                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 322
 323         hw->queues = mvm->first_agg_queue;
 324         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 325         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 326                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 327         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 328                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 329         hw->rate_control_algorithm = "iwl-mvm-rs";
 330         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 331         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 332
 333         /*
 334          * Enable 11w if advertised by firmware and software crypto
 335          * is not enabled (as the firmware will interpret some mgmt
 336          * packets, so enabling it with software crypto isn't safe)
 337          */
 338         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 339             !iwlwifi_mod_params.sw_crypto)
 340                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 341
 342         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 343             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
 344                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 345                 hw->wiphy->features |=
 346                         NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 347                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 348         }
 349
 350         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 351         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 352         hw->chanctx_data_size = sizeof(u16);
 353
 354         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 355                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 356                 BIT(NL80211_IFTYPE_AP) |
 357                 BIT(NL80211_IFTYPE_P2P_GO) |
 358                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 359                 BIT(NL80211_IFTYPE_ADHOC);
 360
 361         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 362         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 363                                        REGULATORY_DISABLE_BEACON_HINTS;
 364
 365         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 366                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 367
 368         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 369
 370         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 371         hw->wiphy->n_iface_combinations =
 372                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 373
 374         hw->wiphy->max_remain_on_channel_duration = 10000;
 375         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 376         /* we can compensate an offset of up to 3 channels = 15 MHz */
 377         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 378
 379         /* Extract MAC address */
 380         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 381         hw->wiphy->addresses = mvm->addresses;
 382         hw->wiphy->n_addresses = 1;
 383
 384         /* Extract additional MAC addresses if available */
 385         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 386                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 387
 388         for (i = 1; i < num_mac; i++) {
 389                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 390                        ETH_ALEN);
 391                 mvm->addresses[i].addr[5]++;
 392                 hw->wiphy->n_addresses++;
 393         }
 394
 395         iwl_mvm_reset_phy_ctxts(mvm);
 396
 397         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 398
 399         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 400
 401         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 402                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 403                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 404         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 405                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 406                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 407
 408         hw->wiphy->hw_version = mvm->trans->hw_id;
 409
 410         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 411                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 412         else
 413                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 414
 415         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 416                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 417                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 418                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 419                 /* we create the 802.11 header and zero length SSID IE. */
 420                 hw->wiphy->max_sched_scan_ie_len =
 421                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 422         }
 423
 424         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 425                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 426                                NL80211_FEATURE_P2P_GO_OPPPS |
 427                                NL80211_FEATURE_DYNAMIC_SMPS |
 428                                NL80211_FEATURE_STATIC_SMPS |
 429                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 430
 431         if (mvm->fw->ucode_capa.capa[0] &
 432             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 433                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 434         if (mvm->fw->ucode_capa.capa[0] &
 435             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 436                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 437
 438         if (mvm->fw->ucode_capa.capa[0] &
 439             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 440                 hw->wiphy->features |=
 441                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 442
 443         if (mvm->fw->ucode_capa.capa[0] &
 444             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 445                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 446
 447         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 448
 449         /* currently FW API supports only one optional cipher scheme */
 450         if (mvm->fw->cs[0].cipher) {
 451                 mvm->hw->n_cipher_schemes = 1;
 452                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 453         }
 454
 455 #ifdef CONFIG_PM_SLEEP
 456         if (iwl_mvm_is_d0i3_supported(mvm) &&
 457             device_can_wakeup(mvm->trans->dev)) {
 458                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 459                 hw->wiphy->wowlan = &mvm->wowlan;
 460         }
 461
 462         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 463             mvm->trans->ops->d3_suspend &&
 464             mvm->trans->ops->d3_resume &&
 465             device_can_wakeup(mvm->trans->dev)) {
 466                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 467                                      WIPHY_WOWLAN_DISCONNECT |
 468                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 469                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 470                                      WIPHY_WOWLAN_NET_DETECT;
 471                 if (!iwlwifi_mod_params.sw_crypto)
 472                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 473                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 474                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 475
 476                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 477                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 478                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 479                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 480                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 481                 hw->wiphy->wowlan = &mvm->wowlan;
 482         }
 483 #endif
 484
 485 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 486         /* assign default bcast filtering configuration */
 487         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 488 #endif
 489
 490         ret = iwl_mvm_leds_init(mvm);
 491         if (ret)
 492                 return ret;
 493
 494         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 495                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 496                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 497         }
 498
 499         if (mvm->fw->ucode_capa.capa[0] &
 500             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
 501                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 502                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 503         }
 504
 505         ret = ieee80211_register_hw(mvm->hw);
 506         if (ret)
 507                 iwl_mvm_leds_exit(mvm);
 508
 509         return ret;
 510 }
 511
 512 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 513                              struct ieee80211_sta *sta,
 514                              struct sk_buff *skb)
 515 {
 516         struct iwl_mvm_sta *mvmsta;
 517         bool defer = false;
 518
 519         /*
 520          * double check the IN_D0I3 flag both before and after
 521          * taking the spinlock, in order to prevent taking
 522          * the spinlock when not needed.
 523          */
 524         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 525                 return false;
 526
 527         spin_lock(&mvm->d0i3_tx_lock);
 528         /*
 529          * testing the flag again ensures the skb dequeue
 530          * loop (on d0i3 exit) hasn't run yet.
 531          */
 532         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 533                 goto out;
 534
 535         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 536         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 537             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 538                 goto out;
 539
 540         __skb_queue_tail(&mvm->d0i3_tx, skb);
 541         ieee80211_stop_queues(mvm->hw);
 542
 543         /* trigger wakeup */
 544         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 545         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 546
 547         defer = true;
 548 out:
 549         spin_unlock(&mvm->d0i3_tx_lock);
 550         return defer;
 551 }
 552
 553 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 554                            struct ieee80211_tx_control *control,
 555                            struct sk_buff *skb)
 556 {
 557         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 558         struct ieee80211_sta *sta = control->sta;
 559         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 560         struct ieee80211_hdr *hdr = (void *)skb->data;
 561
 562         if (iwl_mvm_is_radio_killed(mvm)) {
 563                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 564                 goto drop;
 565         }
 566
 567         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 568             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 569             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 570                 goto drop;
 571
 572         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 573         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 574                      ieee80211_is_mgmt(hdr->frame_control) &&
 575                      !ieee80211_is_deauth(hdr->frame_control) &&
 576                      !ieee80211_is_disassoc(hdr->frame_control) &&
 577                      !ieee80211_is_action(hdr->frame_control)))
 578                 sta = NULL;
 579
 580         if (sta) {
 581                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 582                         return;
 583                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 584                         goto drop;
 585                 return;
 586         }
 587
 588         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 589                 goto drop;
 590         return;
 591  drop:
 592         ieee80211_free_txskb(hw, skb);
 593 }
 594
 595 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 596 {
 597         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 598                 return false;
 599         return true;
 600 }
 601
 602 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 603 {
 604         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 605                 return false;
 606         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 607                 return true;
 608
 609         /* enabled by default */
 610         return true;
 611 }
 612
 613 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 614                                     struct ieee80211_vif *vif,
 615                                     enum ieee80211_ampdu_mlme_action action,
 616                                     struct ieee80211_sta *sta, u16 tid,
 617                                     u16 *ssn, u8 buf_size)
 618 {
 619         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 620         int ret;
 621         bool tx_agg_ref = false;
 622
 623         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 624                      sta->addr, tid, action);
 625
 626         if (!(mvm->nvm_data->sku_cap_11n_enable))
 627                 return -EACCES;
 628
 629         /* return from D0i3 before starting a new Tx aggregation */
 630         switch (action) {
 631         case IEEE80211_AMPDU_TX_START:
 632         case IEEE80211_AMPDU_TX_STOP_CONT:
 633         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 634         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 635         case IEEE80211_AMPDU_TX_OPERATIONAL:
 636                 /*
 637                  * for tx start, wait synchronously until D0i3 exit to
 638                  * get the correct sequence number for the tid.
 639                  * additionally, some other ampdu actions use direct
 640                  * target access, which is not handled automatically
 641                  * by the trans layer (unlike commands), so wait for
 642                  * d0i3 exit in these cases as well.
 643                  */
 644                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 645                 if (ret)
 646                         return ret;
 647
 648                 tx_agg_ref = true;
 649                 break;
 650         default:
 651                 break;
 652         }
 653
 654         mutex_lock(&mvm->mutex);
 655
 656         switch (action) {
 657         case IEEE80211_AMPDU_RX_START:
 658                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 659                         ret = -EINVAL;
 660                         break;
 661                 }
 662                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 663                 break;
 664         case IEEE80211_AMPDU_RX_STOP:
 665                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 666                 break;
 667         case IEEE80211_AMPDU_TX_START:
 668                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 669                         ret = -EINVAL;
 670                         break;
 671                 }
 672                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 673                 break;
 674         case IEEE80211_AMPDU_TX_STOP_CONT:
 675                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 676                 break;
 677         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 678         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 679                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 680                 break;
 681         case IEEE80211_AMPDU_TX_OPERATIONAL:
 682                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 683                 break;
 684         default:
 685                 WARN_ON_ONCE(1);
 686                 ret = -EINVAL;
 687                 break;
 688         }
 689         mutex_unlock(&mvm->mutex);
 690
 691         /*
 692          * If the tid is marked as started, we won't use it for offloaded
 693          * traffic on the next D0i3 entry. It's safe to unref.
 694          */
 695         if (tx_agg_ref)
 696                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 697
 698         return ret;
 699 }
 700
 701 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 702                                      struct ieee80211_vif *vif)
 703 {
 704         struct iwl_mvm *mvm = data;
 705         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 706
 707         mvmvif->uploaded = false;
 708         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 709
 710         /* does this make sense at all? */
 711         mvmvif->color++;
 712
 713         spin_lock_bh(&mvm->time_event_lock);
 714         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 715         spin_unlock_bh(&mvm->time_event_lock);
 716
 717         mvmvif->phy_ctxt = NULL;
 718         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 719 }
 720
 721 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 722                                      const void *data, size_t datalen)
 723 {
 724         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 725         ssize_t bytes_read;
 726         ssize_t bytes_read_trans;
 727
 728         if (offset < dump_ptrs->op_mode_len) {
 729                 bytes_read = min_t(ssize_t, count,
 730                                    dump_ptrs->op_mode_len - offset);
 731                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 732                        bytes_read);
 733                 offset += bytes_read;
 734                 count -= bytes_read;
 735
 736                 if (count == 0)
 737                         return bytes_read;
 738         } else {
 739                 bytes_read = 0;
 740         }
 741
 742         if (!dump_ptrs->trans_ptr)
 743                 return bytes_read;
 744
 745         offset -= dump_ptrs->op_mode_len;
 746         bytes_read_trans = min_t(ssize_t, count,
 747                                  dump_ptrs->trans_ptr->len - offset);
 748         memcpy(buffer + bytes_read,
 749                (u8 *)dump_ptrs->trans_ptr->data + offset,
 750                bytes_read_trans);
 751
 752         return bytes_read + bytes_read_trans;
 753 }
 754
 755 static void iwl_mvm_free_coredump(const void *data)
 756 {
 757         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 758
 759         vfree(fw_error_dump->op_mode_ptr);
 760         vfree(fw_error_dump->trans_ptr);
 761         kfree(fw_error_dump);
 762 }
 763
 764 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 765                                struct iwl_fw_error_dump_data **dump_data)
 766 {
 767         struct iwl_fw_error_dump_fifo *fifo_hdr;
 768         u32 *fifo_data;
 769         u32 fifo_len;
 770         unsigned long flags;
 771         int i, j;
 772
 773         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 774                 return;
 775
 776         /* Pull RXF data from all RXFs */
 777         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 778                 /*
 779                  * Keep aside the additional offset that might be needed for
 780                  * next RXF
 781                  */
 782                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 783
 784                 fifo_hdr = (void *)(*dump_data)->data;
 785                 fifo_data = (void *)fifo_hdr->data;
 786                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
 787
 788                 /* No need to try to read the data if the length is 0 */
 789                 if (fifo_len == 0)
 790                         continue;
 791
 792                 /* Add a TLV for the RXF */
 793                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 794                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 795
 796                 fifo_hdr->fifo_num = cpu_to_le32(i);
 797                 fifo_hdr->available_bytes =
 798                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 799                                                         RXF_RD_D_SPACE +
 800                                                         offset_diff));
 801                 fifo_hdr->wr_ptr =
 802                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 803                                                         RXF_RD_WR_PTR +
 804                                                         offset_diff));
 805                 fifo_hdr->rd_ptr =
 806                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 807                                                         RXF_RD_RD_PTR +
 808                                                         offset_diff));
 809                 fifo_hdr->fence_ptr =
 810                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 811                                                         RXF_RD_FENCE_PTR +
 812                                                         offset_diff));
 813                 fifo_hdr->fence_mode =
 814                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 815                                                         RXF_SET_FENCE_MODE +
 816                                                         offset_diff));
 817
 818                 /* Lock fence */
 819                 iwl_trans_write_prph(mvm->trans,
 820                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
 821                 /* Set fence pointer to the same place like WR pointer */
 822                 iwl_trans_write_prph(mvm->trans,
 823                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
 824                 /* Set fence offset */
 825                 iwl_trans_write_prph(mvm->trans,
 826                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
 827                                      0x0);
 828
 829                 /* Read FIFO */
 830                 fifo_len /= sizeof(u32); /* Size in DWORDS */
 831                 for (j = 0; j < fifo_len; j++)
 832                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
 833                                                          RXF_FIFO_RD_FENCE_INC +
 834                                                          offset_diff);
 835                 *dump_data = iwl_fw_error_next_data(*dump_data);
 836         }
 837
 838         /* Pull TXF data from all TXFs */
 839         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
 840                 /* Mark the number of TXF we're pulling now */
 841                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
 842
 843                 fifo_hdr = (void *)(*dump_data)->data;
 844                 fifo_data = (void *)fifo_hdr->data;
 845                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
 846
 847                 /* No need to try to read the data if the length is 0 */
 848                 if (fifo_len == 0)
 849                         continue;
 850
 851                 /* Add a TLV for the FIFO */
 852                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
 853                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 854
 855                 fifo_hdr->fifo_num = cpu_to_le32(i);
 856                 fifo_hdr->available_bytes =
 857                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 858                                                         TXF_FIFO_ITEM_CNT));
 859                 fifo_hdr->wr_ptr =
 860                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 861                                                         TXF_WR_PTR));
 862                 fifo_hdr->rd_ptr =
 863                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 864                                                         TXF_RD_PTR));
 865                 fifo_hdr->fence_ptr =
 866                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 867                                                         TXF_FENCE_PTR));
 868                 fifo_hdr->fence_mode =
 869                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 870                                                         TXF_LOCK_FENCE));
 871
 872                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
 873                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
 874                                      TXF_WR_PTR);
 875
 876                 /* Dummy-read to advance the read pointer to the head */
 877                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
 878
 879                 /* Read FIFO */
 880                 fifo_len /= sizeof(u32); /* Size in DWORDS */
 881                 for (j = 0; j < fifo_len; j++)
 882                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
 883                                                           TXF_READ_MODIFY_DATA);
 884                 *dump_data = iwl_fw_error_next_data(*dump_data);
 885         }
 886
 887         iwl_trans_release_nic_access(mvm->trans, &flags);
 888 }
 889
 890 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 891 {
 892         struct iwl_fw_error_dump_file *dump_file;
 893         struct iwl_fw_error_dump_data *dump_data;
 894         struct iwl_fw_error_dump_info *dump_info;
 895         struct iwl_fw_error_dump_mem *dump_mem;
 896         struct iwl_mvm_dump_ptrs *fw_error_dump;
 897         u32 sram_len, sram_ofs;
 898         u32 file_len, fifo_data_len = 0;
 899         u32 smem_len = mvm->cfg->smem_len;
 900         u32 sram2_len = mvm->cfg->dccm2_len;
 901
 902         lockdep_assert_held(&mvm->mutex);
 903
 904         /* W/A for 8000 HW family A-step */
 905         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
 906             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP) {
 907                 if (smem_len)
 908                         smem_len = 0x38000;
 909
 910                 if (sram2_len)
 911                         sram2_len = 0x10000;
 912         }
 913
 914         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 915         if (!fw_error_dump)
 916                 return;
 917
 918         /* SRAM - include stack CCM if driver knows the values for it */
 919         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
 920                 const struct fw_img *img;
 921
 922                 img = &mvm->fw->img[mvm->cur_ucode];
 923                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 924                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 925         } else {
 926                 sram_ofs = mvm->cfg->dccm_offset;
 927                 sram_len = mvm->cfg->dccm_len;
 928         }
 929
 930         /* reading RXF/TXF sizes */
 931         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
 932                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
 933                 int i;
 934
 935                 fifo_data_len = 0;
 936
 937                 /* Count RXF size */
 938                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
 939                         if (!mem_cfg->rxfifo_size[i])
 940                                 continue;
 941
 942                         /* Add header info */
 943                         fifo_data_len += mem_cfg->rxfifo_size[i] +
 944                                          sizeof(*dump_data) +
 945                                          sizeof(struct iwl_fw_error_dump_fifo);
 946                 }
 947
 948                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
 949                         if (!mem_cfg->txfifo_size[i])
 950                                 continue;
 951
 952                         /* Add header info */
 953                         fifo_data_len += mem_cfg->txfifo_size[i] +
 954                                          sizeof(*dump_data) +
 955                                          sizeof(struct iwl_fw_error_dump_fifo);
 956                 }
 957         }
 958
 959         file_len = sizeof(*dump_file) +
 960                    sizeof(*dump_data) * 2 +
 961                    sram_len + sizeof(*dump_mem) +
 962                    fifo_data_len +
 963                    sizeof(*dump_info);
 964
 965         /* Make room for the SMEM, if it exists */
 966         if (smem_len)
 967                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
 968
 969         /* Make room for the secondary SRAM, if it exists */
 970         if (sram2_len)
 971                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
 972
 973         dump_file = vzalloc(file_len);
 974         if (!dump_file) {
 975                 kfree(fw_error_dump);
 976                 return;
 977         }
 978
 979         fw_error_dump->op_mode_ptr = dump_file;
 980
 981         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 982         dump_data = (void *)dump_file->data;
 983
 984         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 985         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 986         dump_info = (void *) dump_data->data;
 987         dump_info->device_family =
 988                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 989                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 990                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 991         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
 992         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 993                sizeof(dump_info->fw_human_readable));
 994         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 995                 sizeof(dump_info->dev_human_readable));
 996         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 997                 sizeof(dump_info->bus_human_readable));
 998
 999         dump_data = iwl_fw_error_next_data(dump_data);
1000         /* We only dump the FIFOs if the FW is in error state */
1001         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1002                 iwl_mvm_dump_fifos(mvm, &dump_data);
1003
1004         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1005         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1006         dump_mem = (void *)dump_data->data;
1007         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1008         dump_mem->offset = cpu_to_le32(sram_ofs);
1009         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1010                                  sram_len);
1011
1012         if (smem_len) {
1013                 dump_data = iwl_fw_error_next_data(dump_data);
1014                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1015                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1016                 dump_mem = (void *)dump_data->data;
1017                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1018                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1019                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1020                                          dump_mem->data, smem_len);
1021         }
1022
1023         if (sram2_len) {
1024                 dump_data = iwl_fw_error_next_data(dump_data);
1025                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1026                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1027                 dump_mem = (void *)dump_data->data;
1028                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1029                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1030                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1031                                          dump_mem->data, sram2_len);
1032         }
1033
1034         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
1035         fw_error_dump->op_mode_len = file_len;
1036         if (fw_error_dump->trans_ptr)
1037                 file_len += fw_error_dump->trans_ptr->len;
1038         dump_file->file_len = cpu_to_le32(file_len);
1039
1040         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1041                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1042 }
1043
1044 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1045 {
1046         /* clear the D3 reconfig, we only need it to avoid dumping a
1047          * firmware coredump on reconfiguration, we shouldn't do that
1048          * on D3->D0 transition
1049          */
1050         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
1051                 iwl_mvm_fw_error_dump(mvm);
1052
1053         /* cleanup all stale references (scan, roc), but keep the
1054          * ucode_down ref until reconfig is complete
1055          */
1056         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1057
1058         iwl_trans_stop_device(mvm->trans);
1059
1060         mvm->scan_status = IWL_MVM_SCAN_NONE;
1061         mvm->ps_disabled = false;
1062         mvm->calibrating = false;
1063
1064         /* just in case one was running */
1065         ieee80211_remain_on_channel_expired(mvm->hw);
1066
1067         ieee80211_iterate_active_interfaces_atomic(
1068                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1069                 iwl_mvm_cleanup_iterator, mvm);
1070
1071         mvm->p2p_device_vif = NULL;
1072         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1073
1074         iwl_mvm_reset_phy_ctxts(mvm);
1075         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1076         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1077         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1078         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1079         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1080         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1081         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1082         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1083         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1084
1085         ieee80211_wake_queues(mvm->hw);
1086
1087         /* clear any stale d0i3 state */
1088         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1089
1090         mvm->vif_count = 0;
1091         mvm->rx_ba_sessions = 0;
1092 }
1093
1094 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1095 {
1096         int ret;
1097
1098         lockdep_assert_held(&mvm->mutex);
1099
1100         /* Clean up some internal and mac80211 state on restart */
1101         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1102                 iwl_mvm_restart_cleanup(mvm);
1103
1104         ret = iwl_mvm_up(mvm);
1105
1106         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1107                 /* Something went wrong - we need to finish some cleanup
1108                  * that normally iwl_mvm_mac_restart_complete() below
1109                  * would do.
1110                  */
1111                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1112                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1113         }
1114
1115         return ret;
1116 }
1117
1118 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1119 {
1120         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1121         int ret;
1122
1123         /* Some hw restart cleanups must not hold the mutex */
1124         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1125                 /*
1126                  * Make sure we are out of d0i3. This is needed
1127                  * to make sure the reference accounting is correct
1128                  * (and there is no stale d0i3_exit_work).
1129                  */
1130                 wait_event_timeout(mvm->d0i3_exit_waitq,
1131                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1132                                              &mvm->status),
1133                                    HZ);
1134         }
1135
1136         mutex_lock(&mvm->mutex);
1137         ret = __iwl_mvm_mac_start(mvm);
1138         mutex_unlock(&mvm->mutex);
1139
1140         return ret;
1141 }
1142
1143 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1144 {
1145         int ret;
1146
1147         mutex_lock(&mvm->mutex);
1148
1149         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1150         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1151         ret = iwl_mvm_update_quotas(mvm, NULL);
1152         if (ret)
1153                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1154                         ret);
1155
1156         /* allow transport/FW low power modes */
1157         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1158
1159         /*
1160          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1161          * of packets the FW sent out, so we must reconnect.
1162          */
1163         iwl_mvm_teardown_tdls_peers(mvm);
1164
1165         mutex_unlock(&mvm->mutex);
1166 }
1167
1168 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1169 {
1170         bool exit_now;
1171
1172         if (!iwl_mvm_is_d0i3_supported(mvm))
1173                 return;
1174
1175         mutex_lock(&mvm->d0i3_suspend_mutex);
1176         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1177         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1178                                         &mvm->d0i3_suspend_flags);
1179         mutex_unlock(&mvm->d0i3_suspend_mutex);
1180
1181         if (exit_now) {
1182                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1183                 _iwl_mvm_exit_d0i3(mvm);
1184         }
1185
1186         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1187                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1188                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1189                                                   &mvm->status),
1190                                         HZ))
1191                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1192 }
1193
1194 static void
1195 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1196                               enum ieee80211_reconfig_type reconfig_type)
1197 {
1198         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1199
1200         switch (reconfig_type) {
1201         case IEEE80211_RECONFIG_TYPE_RESTART:
1202                 iwl_mvm_restart_complete(mvm);
1203                 break;
1204         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1205                 iwl_mvm_resume_complete(mvm);
1206                 break;
1207         }
1208 }
1209
1210 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1211 {
1212         lockdep_assert_held(&mvm->mutex);
1213
1214         /*
1215          * Disallow low power states when the FW is down by taking
1216          * the UCODE_DOWN ref. in case of ongoing hw restart the
1217          * ref is already taken, so don't take it again.
1218          */
1219         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1220                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1221
1222         /* async_handlers_wk is now blocked */
1223
1224         /*
1225          * The work item could be running or queued if the
1226          * ROC time event stops just as we get here.
1227          */
1228         cancel_work_sync(&mvm->roc_done_wk);
1229
1230         iwl_trans_stop_device(mvm->trans);
1231
1232         iwl_mvm_async_handlers_purge(mvm);
1233         /* async_handlers_list is empty and will stay empty: HW is stopped */
1234
1235         /* the fw is stopped, the aux sta is dead: clean up driver state */
1236         iwl_mvm_del_aux_sta(mvm);
1237
1238         /*
1239          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1240          * won't be called in this case).
1241          */
1242         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1243
1244         mvm->ucode_loaded = false;
1245 }
1246
1247 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1248 {
1249         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1250
1251         flush_work(&mvm->d0i3_exit_work);
1252         flush_work(&mvm->async_handlers_wk);
1253         flush_work(&mvm->fw_error_dump_wk);
1254
1255         mutex_lock(&mvm->mutex);
1256         __iwl_mvm_mac_stop(mvm);
1257         mutex_unlock(&mvm->mutex);
1258
1259         /*
1260          * The worker might have been waiting for the mutex, let it run and
1261          * discover that its list is now empty.
1262          */
1263         cancel_work_sync(&mvm->async_handlers_wk);
1264 }
1265
1266 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1267 {
1268         u16 i;
1269
1270         lockdep_assert_held(&mvm->mutex);
1271
1272         for (i = 0; i < NUM_PHY_CTX; i++)
1273                 if (!mvm->phy_ctxts[i].ref)
1274                         return &mvm->phy_ctxts[i];
1275
1276         IWL_ERR(mvm, "No available PHY context\n");
1277         return NULL;
1278 }
1279
1280 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1281                                 s8 tx_power)
1282 {
1283         /* FW is in charge of regulatory enforcement */
1284         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1285                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1286                 .pwr_restriction = cpu_to_le16(tx_power),
1287         };
1288
1289         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1290                                     sizeof(reduce_txpwr_cmd),
1291                                     &reduce_txpwr_cmd);
1292 }
1293
1294 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1295                                      struct ieee80211_vif *vif)
1296 {
1297         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1298         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1299         int ret;
1300
1301         /*
1302          * make sure D0i3 exit is completed, otherwise a target access
1303          * during tx queue configuration could be done when still in
1304          * D0i3 state.
1305          */
1306         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1307         if (ret)
1308                 return ret;
1309
1310         /*
1311          * Not much to do here. The stack will not allow interface
1312          * types or combinations that we didn't advertise, so we
1313          * don't really have to check the types.
1314          */
1315
1316         mutex_lock(&mvm->mutex);
1317
1318         /* Allocate resources for the MAC context, and add it to the fw  */
1319         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1320         if (ret)
1321                 goto out_unlock;
1322
1323         /* Counting number of interfaces is needed for legacy PM */
1324         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1325                 mvm->vif_count++;
1326
1327         /*
1328          * The AP binding flow can be done only after the beacon
1329          * template is configured (which happens only in the mac80211
1330          * start_ap() flow), and adding the broadcast station can happen
1331          * only after the binding.
1332          * In addition, since modifying the MAC before adding a bcast
1333          * station is not allowed by the FW, delay the adding of MAC context to
1334          * the point where we can also add the bcast station.
1335          * In short: there's not much we can do at this point, other than
1336          * allocating resources :)
1337          */
1338         if (vif->type == NL80211_IFTYPE_AP ||
1339             vif->type == NL80211_IFTYPE_ADHOC) {
1340                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1341                 if (ret) {
1342                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1343                         goto out_release;
1344                 }
1345
1346                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1347                 goto out_unlock;
1348         }
1349
1350         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1351         if (ret)
1352                 goto out_release;
1353
1354         ret = iwl_mvm_power_update_mac(mvm);
1355         if (ret)
1356                 goto out_release;
1357
1358         /* beacon filtering */
1359         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1360         if (ret)
1361                 goto out_remove_mac;
1362
1363         if (!mvm->bf_allowed_vif &&
1364             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1365                 mvm->bf_allowed_vif = mvmvif;
1366                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1367                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1368         }
1369
1370         /*
1371          * P2P_DEVICE interface does not have a channel context assigned to it,
1372          * so a dedicated PHY context is allocated to it and the corresponding
1373          * MAC context is bound to it at this stage.
1374          */
1375         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1376
1377                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1378                 if (!mvmvif->phy_ctxt) {
1379                         ret = -ENOSPC;
1380                         goto out_free_bf;
1381                 }
1382
1383                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1384                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1385                 if (ret)
1386                         goto out_unref_phy;
1387
1388                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1389                 if (ret)
1390                         goto out_unbind;
1391
1392                 /* Save a pointer to p2p device vif, so it can later be used to
1393                  * update the p2p device MAC when a GO is started/stopped */
1394                 mvm->p2p_device_vif = vif;
1395         }
1396
1397         iwl_mvm_vif_dbgfs_register(mvm, vif);
1398         goto out_unlock;
1399
1400  out_unbind:
1401         iwl_mvm_binding_remove_vif(mvm, vif);
1402  out_unref_phy:
1403         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1404  out_free_bf:
1405         if (mvm->bf_allowed_vif == mvmvif) {
1406                 mvm->bf_allowed_vif = NULL;
1407                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1408                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1409         }
1410  out_remove_mac:
1411         mvmvif->phy_ctxt = NULL;
1412         iwl_mvm_mac_ctxt_remove(mvm, vif);
1413  out_release:
1414         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1415                 mvm->vif_count--;
1416
1417         iwl_mvm_mac_ctxt_release(mvm, vif);
1418  out_unlock:
1419         mutex_unlock(&mvm->mutex);
1420
1421         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1422
1423         return ret;
1424 }
1425
1426 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1427                                         struct ieee80211_vif *vif)
1428 {
1429         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1430
1431         if (tfd_msk) {
1432                 mutex_lock(&mvm->mutex);
1433                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1434                 mutex_unlock(&mvm->mutex);
1435         }
1436
1437         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1438                 /*
1439                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1440                  * We assume here that all the packets sent to the OFFCHANNEL
1441                  * queue are sent in ROC session.
1442                  */
1443                 flush_work(&mvm->roc_done_wk);
1444         } else {
1445                 /*
1446                  * By now, all the AC queues are empty. The AGG queues are
1447                  * empty too. We already got all the Tx responses for all the
1448                  * packets in the queues. The drain work can have been
1449                  * triggered. Flush it.
1450                  */
1451                 flush_work(&mvm->sta_drained_wk);
1452         }
1453 }
1454
1455 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1456                                          struct ieee80211_vif *vif)
1457 {
1458         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1459         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1460
1461         iwl_mvm_prepare_mac_removal(mvm, vif);
1462
1463         mutex_lock(&mvm->mutex);
1464
1465         if (mvm->bf_allowed_vif == mvmvif) {
1466                 mvm->bf_allowed_vif = NULL;
1467                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1468                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1469         }
1470
1471         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1472
1473         /*
1474          * For AP/GO interface, the tear down of the resources allocated to the
1475          * interface is be handled as part of the stop_ap flow.
1476          */
1477         if (vif->type == NL80211_IFTYPE_AP ||
1478             vif->type == NL80211_IFTYPE_ADHOC) {
1479 #ifdef CONFIG_NL80211_TESTMODE
1480                 if (vif == mvm->noa_vif) {
1481                         mvm->noa_vif = NULL;
1482                         mvm->noa_duration = 0;
1483                 }
1484 #endif
1485                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1486                 goto out_release;
1487         }
1488
1489         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1490                 mvm->p2p_device_vif = NULL;
1491                 iwl_mvm_rm_bcast_sta(mvm, vif);
1492                 iwl_mvm_binding_remove_vif(mvm, vif);
1493                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1494                 mvmvif->phy_ctxt = NULL;
1495         }
1496
1497         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1498                 mvm->vif_count--;
1499
1500         iwl_mvm_power_update_mac(mvm);
1501         iwl_mvm_mac_ctxt_remove(mvm, vif);
1502
1503 out_release:
1504         iwl_mvm_mac_ctxt_release(mvm, vif);
1505         mutex_unlock(&mvm->mutex);
1506 }
1507
1508 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1509 {
1510         return 0;
1511 }
1512
1513 struct iwl_mvm_mc_iter_data {
1514         struct iwl_mvm *mvm;
1515         int port_id;
1516 };
1517
1518 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1519                                       struct ieee80211_vif *vif)
1520 {
1521         struct iwl_mvm_mc_iter_data *data = _data;
1522         struct iwl_mvm *mvm = data->mvm;
1523         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1524         int ret, len;
1525
1526         /* if we don't have free ports, mcast frames will be dropped */
1527         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1528                 return;
1529
1530         if (vif->type != NL80211_IFTYPE_STATION ||
1531             !vif->bss_conf.assoc)
1532                 return;
1533
1534         cmd->port_id = data->port_id++;
1535         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1536         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1537
1538         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1539         if (ret)
1540                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1541 }
1542
1543 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1544 {
1545         struct iwl_mvm_mc_iter_data iter_data = {
1546                 .mvm = mvm,
1547         };
1548
1549         lockdep_assert_held(&mvm->mutex);
1550
1551         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1552                 return;
1553
1554         ieee80211_iterate_active_interfaces_atomic(
1555                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1556                 iwl_mvm_mc_iface_iterator, &iter_data);
1557 }
1558
1559 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1560                                      struct netdev_hw_addr_list *mc_list)
1561 {
1562         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1563         struct iwl_mcast_filter_cmd *cmd;
1564         struct netdev_hw_addr *addr;
1565         int addr_count;
1566         bool pass_all;
1567         int len;
1568
1569         addr_count = netdev_hw_addr_list_count(mc_list);
1570         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1571                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1572         if (pass_all)
1573                 addr_count = 0;
1574
1575         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1576         cmd = kzalloc(len, GFP_ATOMIC);
1577         if (!cmd)
1578                 return 0;
1579
1580         if (pass_all) {
1581                 cmd->pass_all = 1;
1582                 return (u64)(unsigned long)cmd;
1583         }
1584
1585         netdev_hw_addr_list_for_each(addr, mc_list) {
1586                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1587                                    cmd->count, addr->addr);
1588                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1589                        addr->addr, ETH_ALEN);
1590                 cmd->count++;
1591         }
1592
1593         return (u64)(unsigned long)cmd;
1594 }
1595
1596 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1597                                      unsigned int changed_flags,
1598                                      unsigned int *total_flags,
1599                                      u64 multicast)
1600 {
1601         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1602         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1603
1604         mutex_lock(&mvm->mutex);
1605
1606         /* replace previous configuration */
1607         kfree(mvm->mcast_filter_cmd);
1608         mvm->mcast_filter_cmd = cmd;
1609
1610         if (!cmd)
1611                 goto out;
1612
1613         iwl_mvm_recalc_multicast(mvm);
1614 out:
1615         mutex_unlock(&mvm->mutex);
1616         *total_flags = 0;
1617 }
1618
1619 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1620 struct iwl_bcast_iter_data {
1621         struct iwl_mvm *mvm;
1622         struct iwl_bcast_filter_cmd *cmd;
1623         u8 current_filter;
1624 };
1625
1626 static void
1627 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1628                          const struct iwl_fw_bcast_filter *in_filter,
1629                          struct iwl_fw_bcast_filter *out_filter)
1630 {
1631         struct iwl_fw_bcast_filter_attr *attr;
1632         int i;
1633
1634         memcpy(out_filter, in_filter, sizeof(*out_filter));
1635
1636         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1637                 attr = &out_filter->attrs[i];
1638
1639                 if (!attr->mask)
1640                         break;
1641
1642                 switch (attr->reserved1) {
1643                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1644                         if (vif->bss_conf.arp_addr_cnt != 1) {
1645                                 attr->mask = 0;
1646                                 continue;
1647                         }
1648
1649                         attr->val = vif->bss_conf.arp_addr_list[0];
1650                         break;
1651                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1652                         attr->val = *(__be32 *)&vif->addr[2];
1653                         break;
1654                 default:
1655                         break;
1656                 }
1657                 attr->reserved1 = 0;
1658                 out_filter->num_attrs++;
1659         }
1660 }
1661
1662 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1663                                           struct ieee80211_vif *vif)
1664 {
1665         struct iwl_bcast_iter_data *data = _data;
1666         struct iwl_mvm *mvm = data->mvm;
1667         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1668         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1669         struct iwl_fw_bcast_mac *bcast_mac;
1670         int i;
1671
1672         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1673                 return;
1674
1675         bcast_mac = &cmd->macs[mvmvif->id];
1676
1677         /*
1678          * enable filtering only for associated stations, but not for P2P
1679          * Clients
1680          */
1681         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1682             !vif->bss_conf.assoc)
1683                 return;
1684
1685         bcast_mac->default_discard = 1;
1686
1687         /* copy all configured filters */
1688         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1689                 /*
1690                  * Make sure we don't exceed our filters limit.
1691                  * if there is still a valid filter to be configured,
1692                  * be on the safe side and just allow bcast for this mac.
1693                  */
1694                 if (WARN_ON_ONCE(data->current_filter >=
1695                                  ARRAY_SIZE(cmd->filters))) {
1696                         bcast_mac->default_discard = 0;
1697                         bcast_mac->attached_filters = 0;
1698                         break;
1699                 }
1700
1701                 iwl_mvm_set_bcast_filter(vif,
1702                                          &mvm->bcast_filters[i],
1703                                          &cmd->filters[data->current_filter]);
1704
1705                 /* skip current filter if it contains no attributes */
1706                 if (!cmd->filters[data->current_filter].num_attrs)
1707                         continue;
1708
1709                 /* attach the filter to current mac */
1710                 bcast_mac->attached_filters |=
1711                                 cpu_to_le16(BIT(data->current_filter));
1712
1713                 data->current_filter++;
1714         }
1715 }
1716
1717 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1718                                     struct iwl_bcast_filter_cmd *cmd)
1719 {
1720         struct iwl_bcast_iter_data iter_data = {
1721                 .mvm = mvm,
1722                 .cmd = cmd,
1723         };
1724
1725         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1726                 return false;
1727
1728         memset(cmd, 0, sizeof(*cmd));
1729         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1730         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1731
1732 #ifdef CONFIG_IWLWIFI_DEBUGFS
1733         /* use debugfs filters/macs if override is configured */
1734         if (mvm->dbgfs_bcast_filtering.override) {
1735                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1736                        sizeof(cmd->filters));
1737                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1738                        sizeof(cmd->macs));
1739                 return true;
1740         }
1741 #endif
1742
1743         /* if no filters are configured, do nothing */
1744         if (!mvm->bcast_filters)
1745                 return false;
1746
1747         /* configure and attach these filters for each associated sta vif */
1748         ieee80211_iterate_active_interfaces(
1749                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1750                 iwl_mvm_bcast_filter_iterator, &iter_data);
1751
1752         return true;
1753 }
1754 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1755                                           struct ieee80211_vif *vif)
1756 {
1757         struct iwl_bcast_filter_cmd cmd;
1758
1759         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1760                 return 0;
1761
1762         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1763                 return 0;
1764
1765         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1766                                     sizeof(cmd), &cmd);
1767 }
1768 #else
1769 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1770                                                  struct ieee80211_vif *vif)
1771 {
1772         return 0;
1773 }
1774 #endif
1775
1776 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1777                                              struct ieee80211_vif *vif,
1778                                              struct ieee80211_bss_conf *bss_conf,
1779                                              u32 changes)
1780 {
1781         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1782         int ret;
1783
1784         /*
1785          * Re-calculate the tsf id, as the master-slave relations depend on the
1786          * beacon interval, which was not known when the station interface was
1787          * added.
1788          */
1789         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1790                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1791
1792         /*
1793          * If we're not associated yet, take the (new) BSSID before associating
1794          * so the firmware knows. If we're already associated, then use the old
1795          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1796          * branch for disassociation below.
1797          */
1798         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1799                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1800
1801         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1802         if (ret)
1803                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1804
1805         /* after sending it once, adopt mac80211 data */
1806         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1807         mvmvif->associated = bss_conf->assoc;
1808
1809         if (changes & BSS_CHANGED_ASSOC) {
1810                 if (bss_conf->assoc) {
1811                         /* add quota for this interface */
1812                         ret = iwl_mvm_update_quotas(mvm, NULL);
1813                         if (ret) {
1814                                 IWL_ERR(mvm, "failed to update quotas\n");
1815                                 return;
1816                         }
1817
1818                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1819                                      &mvm->status)) {
1820                                 /*
1821                                  * If we're restarting then the firmware will
1822                                  * obviously have lost synchronisation with
1823                                  * the AP. It will attempt to synchronise by
1824                                  * itself, but we can make it more reliable by
1825                                  * scheduling a session protection time event.
1826                                  *
1827                                  * The firmware needs to receive a beacon to
1828                                  * catch up with synchronisation, use 110% of
1829                                  * the beacon interval.
1830                                  *
1831                                  * Set a large maximum delay to allow for more
1832                                  * than a single interface.
1833                                  */
1834                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1835                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1836                                                         5 * dur, false);
1837                         }
1838
1839                         iwl_mvm_sf_update(mvm, vif, false);
1840                         iwl_mvm_power_vif_assoc(mvm, vif);
1841                         if (vif->p2p) {
1842                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1843                                 iwl_mvm_update_smps(mvm, vif,
1844                                                     IWL_MVM_SMPS_REQ_PROT,
1845                                                     IEEE80211_SMPS_DYNAMIC);
1846                         }
1847                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1848                         /*
1849                          * If update fails - SF might be running in associated
1850                          * mode while disassociated - which is forbidden.
1851                          */
1852                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1853                                   "Failed to update SF upon disassociation\n");
1854
1855                         /* remove AP station now that the MAC is unassoc */
1856                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1857                         if (ret)
1858                                 IWL_ERR(mvm, "failed to remove AP station\n");
1859
1860                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1861                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1862                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1863                         /* remove quota for this interface */
1864                         ret = iwl_mvm_update_quotas(mvm, NULL);
1865                         if (ret)
1866                                 IWL_ERR(mvm, "failed to update quotas\n");
1867
1868                         if (vif->p2p)
1869                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1870
1871                         /* this will take the cleared BSSID from bss_conf */
1872                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1873                         if (ret)
1874                                 IWL_ERR(mvm,
1875                                         "failed to update MAC %pM (clear after unassoc)\n",
1876                                         vif->addr);
1877                 }
1878
1879                 iwl_mvm_recalc_multicast(mvm);
1880                 iwl_mvm_configure_bcast_filter(mvm, vif);
1881
1882                 /* reset rssi values */
1883                 mvmvif->bf_data.ave_beacon_signal = 0;
1884
1885                 iwl_mvm_bt_coex_vif_change(mvm);
1886                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1887                                     IEEE80211_SMPS_AUTOMATIC);
1888         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1889                 /*
1890                  * We received a beacon _after_ association so
1891                  * remove the session protection.
1892                  */
1893                 iwl_mvm_remove_time_event(mvm, mvmvif,
1894                                           &mvmvif->time_event_data);
1895         }
1896
1897         if (changes & BSS_CHANGED_BEACON_INFO) {
1898                 iwl_mvm_sf_update(mvm, vif, false);
1899                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1900         }
1901
1902         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1903                 ret = iwl_mvm_power_update_mac(mvm);
1904                 if (ret)
1905                         IWL_ERR(mvm, "failed to update power mode\n");
1906         }
1907
1908         if (changes & BSS_CHANGED_TXPOWER) {
1909                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1910                                 bss_conf->txpower);
1911                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1912         }
1913
1914         if (changes & BSS_CHANGED_CQM) {
1915                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1916                 /* reset cqm events tracking */
1917                 mvmvif->bf_data.last_cqm_event = 0;
1918                 if (mvmvif->bf_data.bf_enabled) {
1919                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1920                         if (ret)
1921                                 IWL_ERR(mvm,
1922                                         "failed to update CQM thresholds\n");
1923                 }
1924         }
1925
1926         if (changes & BSS_CHANGED_ARP_FILTER) {
1927                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1928                 iwl_mvm_configure_bcast_filter(mvm, vif);
1929         }
1930 }
1931
1932 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1933                                  struct ieee80211_vif *vif)
1934 {
1935         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1936         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1937         int ret;
1938
1939         /*
1940          * iwl_mvm_mac_ctxt_add() might read directly from the device
1941          * (the system time), so make sure it is available.
1942          */
1943         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1944         if (ret)
1945                 return ret;
1946
1947         mutex_lock(&mvm->mutex);
1948
1949         /* Send the beacon template */
1950         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1951         if (ret)
1952                 goto out_unlock;
1953
1954         /*
1955          * Re-calculate the tsf id, as the master-slave relations depend on the
1956          * beacon interval, which was not known when the AP interface was added.
1957          */
1958         if (vif->type == NL80211_IFTYPE_AP)
1959                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1960
1961         /* Add the mac context */
1962         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1963         if (ret)
1964                 goto out_unlock;
1965
1966         /* Perform the binding */
1967         ret = iwl_mvm_binding_add_vif(mvm, vif);
1968         if (ret)
1969                 goto out_remove;
1970
1971         /* Send the bcast station. At this stage the TBTT and DTIM time events
1972          * are added and applied to the scheduler */
1973         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1974         if (ret)
1975                 goto out_unbind;
1976
1977         /* must be set before quota calculations */
1978         mvmvif->ap_ibss_active = true;
1979
1980         /* power updated needs to be done before quotas */
1981         iwl_mvm_power_update_mac(mvm);
1982
1983         ret = iwl_mvm_update_quotas(mvm, NULL);
1984         if (ret)
1985                 goto out_quota_failed;
1986
1987         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1988         if (vif->p2p && mvm->p2p_device_vif)
1989                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1990
1991         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1992
1993         iwl_mvm_bt_coex_vif_change(mvm);
1994
1995         /* we don't support TDLS during DCM */
1996         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1997                 iwl_mvm_teardown_tdls_peers(mvm);
1998
1999         mutex_unlock(&mvm->mutex);
2000         return 0;
2001
2002 out_quota_failed:
2003         iwl_mvm_power_update_mac(mvm);
2004         mvmvif->ap_ibss_active = false;
2005         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2006 out_unbind:
2007         iwl_mvm_binding_remove_vif(mvm, vif);
2008 out_remove:
2009         iwl_mvm_mac_ctxt_remove(mvm, vif);
2010 out_unlock:
2011         mutex_unlock(&mvm->mutex);
2012         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2013         return ret;
2014 }
2015
2016 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2017                                  struct ieee80211_vif *vif)
2018 {
2019         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2020         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2021
2022         iwl_mvm_prepare_mac_removal(mvm, vif);
2023
2024         mutex_lock(&mvm->mutex);
2025
2026         /* Handle AP stop while in CSA */
2027         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2028                 iwl_mvm_remove_time_event(mvm, mvmvif,
2029                                           &mvmvif->time_event_data);
2030                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2031         }
2032
2033         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2034                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2035                 mvm->csa_tx_block_bcn_timeout = 0;
2036         }
2037
2038         mvmvif->ap_ibss_active = false;
2039         mvm->ap_last_beacon_gp2 = 0;
2040
2041         iwl_mvm_bt_coex_vif_change(mvm);
2042
2043         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2044
2045         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2046         if (vif->p2p && mvm->p2p_device_vif)
2047                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2048
2049         iwl_mvm_update_quotas(mvm, NULL);
2050         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2051         iwl_mvm_binding_remove_vif(mvm, vif);
2052
2053         iwl_mvm_power_update_mac(mvm);
2054
2055         iwl_mvm_mac_ctxt_remove(mvm, vif);
2056
2057         mutex_unlock(&mvm->mutex);
2058 }
2059
2060 static void
2061 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2062                                  struct ieee80211_vif *vif,
2063                                  struct ieee80211_bss_conf *bss_conf,
2064                                  u32 changes)
2065 {
2066         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2067
2068         /* Changes will be applied when the AP/IBSS is started */
2069         if (!mvmvif->ap_ibss_active)
2070                 return;
2071
2072         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2073                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2074             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2075                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2076
2077         /* Need to send a new beacon template to the FW */
2078         if (changes & BSS_CHANGED_BEACON &&
2079             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2080                 IWL_WARN(mvm, "Failed updating beacon data\n");
2081
2082         if (changes & BSS_CHANGED_TXPOWER) {
2083                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2084                                 bss_conf->txpower);
2085                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2086         }
2087
2088 }
2089
2090 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2091                                      struct ieee80211_vif *vif,
2092                                      struct ieee80211_bss_conf *bss_conf,
2093                                      u32 changes)
2094 {
2095         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2096
2097         /*
2098          * iwl_mvm_bss_info_changed_station() might call
2099          * iwl_mvm_protect_session(), which reads directly from
2100          * the device (the system time), so make sure it is available.
2101          */
2102         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2103                 return;
2104
2105         mutex_lock(&mvm->mutex);
2106
2107         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2108                 iwl_mvm_scan_offload_stop(mvm, true);
2109
2110         switch (vif->type) {
2111         case NL80211_IFTYPE_STATION:
2112                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2113                 break;
2114         case NL80211_IFTYPE_AP:
2115         case NL80211_IFTYPE_ADHOC:
2116                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2117                 break;
2118         default:
2119                 /* shouldn't happen */
2120                 WARN_ON_ONCE(1);
2121         }
2122
2123         mutex_unlock(&mvm->mutex);
2124         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2125 }
2126
2127 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
2128                                           enum iwl_scan_status scan_type)
2129 {
2130         int ret;
2131         bool wait_for_handlers = false;
2132
2133         mutex_lock(&mvm->mutex);
2134
2135         if (mvm->scan_status != scan_type) {
2136                 ret = 0;
2137                 /* make sure there are no pending notifications */
2138                 wait_for_handlers = true;
2139                 goto out;
2140         }
2141
2142         switch (scan_type) {
2143         case IWL_MVM_SCAN_SCHED:
2144                 ret = iwl_mvm_scan_offload_stop(mvm, true);
2145                 break;
2146         case IWL_MVM_SCAN_OS:
2147                 ret = iwl_mvm_cancel_scan(mvm);
2148                 break;
2149         case IWL_MVM_SCAN_NONE:
2150         default:
2151                 WARN_ON_ONCE(1);
2152                 ret = -EINVAL;
2153                 break;
2154         }
2155         if (ret)
2156                 goto out;
2157
2158         wait_for_handlers = true;
2159 out:
2160         mutex_unlock(&mvm->mutex);
2161
2162         /* make sure we consume the completion notification */
2163         if (wait_for_handlers)
2164                 iwl_mvm_wait_for_async_handlers(mvm);
2165
2166         return ret;
2167 }
2168 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2169                                struct ieee80211_vif *vif,
2170                                struct ieee80211_scan_request *hw_req)
2171 {
2172         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2173         struct cfg80211_scan_request *req = &hw_req->req;
2174         int ret;
2175
2176         if (req->n_channels == 0 ||
2177             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
2178                 return -EINVAL;
2179
2180         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2181                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
2182                 if (ret)
2183                         return ret;
2184         }
2185
2186         mutex_lock(&mvm->mutex);
2187
2188         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2189                 ret = -EBUSY;
2190                 goto out;
2191         }
2192
2193         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
2194
2195         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2196                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2197         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2198                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2199         else
2200                 ret = iwl_mvm_scan_request(mvm, vif, req);
2201
2202         if (ret)
2203                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2204 out:
2205         mutex_unlock(&mvm->mutex);
2206         return ret;
2207 }
2208
2209 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2210                                        struct ieee80211_vif *vif)
2211 {
2212         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2213
2214         mutex_lock(&mvm->mutex);
2215
2216         iwl_mvm_cancel_scan(mvm);
2217
2218         mutex_unlock(&mvm->mutex);
2219 }
2220
2221 static void
2222 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2223                                   struct ieee80211_sta *sta, u16 tids,
2224                                   int num_frames,
2225                                   enum ieee80211_frame_release_type reason,
2226                                   bool more_data)
2227 {
2228         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2229
2230         /* Called when we need to transmit (a) frame(s) from mac80211 */
2231
2232         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2233                                           tids, more_data, false);
2234 }
2235
2236 static void
2237 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2238                                     struct ieee80211_sta *sta, u16 tids,
2239                                     int num_frames,
2240                                     enum ieee80211_frame_release_type reason,
2241                                     bool more_data)
2242 {
2243         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2244
2245         /* Called when we need to transmit (a) frame(s) from agg queue */
2246
2247         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2248                                           tids, more_data, true);
2249 }
2250
2251 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2252                                    struct ieee80211_vif *vif,
2253                                    enum sta_notify_cmd cmd,
2254                                    struct ieee80211_sta *sta)
2255 {
2256         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2257         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2258         int tid;
2259
2260         switch (cmd) {
2261         case STA_NOTIFY_SLEEP:
2262                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2263                         ieee80211_sta_block_awake(hw, sta, true);
2264                 spin_lock_bh(&mvmsta->lock);
2265                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2266                         struct iwl_mvm_tid_data *tid_data;
2267
2268                         tid_data = &mvmsta->tid_data[tid];
2269                         if (tid_data->state != IWL_AGG_ON &&
2270                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2271                                 continue;
2272                         if (iwl_mvm_tid_queued(tid_data) == 0)
2273                                 continue;
2274                         ieee80211_sta_set_buffered(sta, tid, true);
2275                 }
2276                 spin_unlock_bh(&mvmsta->lock);
2277                 /*
2278                  * The fw updates the STA to be asleep. Tx packets on the Tx
2279                  * queues to this station will not be transmitted. The fw will
2280                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2281                  */
2282                 break;
2283         case STA_NOTIFY_AWAKE:
2284                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2285                         break;
2286                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2287                 break;
2288         default:
2289                 break;
2290         }
2291 }
2292
2293 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2294                                        struct ieee80211_vif *vif,
2295                                        struct ieee80211_sta *sta)
2296 {
2297         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2298         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2299
2300         /*
2301          * This is called before mac80211 does RCU synchronisation,
2302          * so here we already invalidate our internal RCU-protected
2303          * station pointer. The rest of the code will thus no longer
2304          * be able to find the station this way, and we don't rely
2305          * on further RCU synchronisation after the sta_state()
2306          * callback deleted the station.
2307          */
2308         mutex_lock(&mvm->mutex);
2309         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2310                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2311                                    ERR_PTR(-ENOENT));
2312         mutex_unlock(&mvm->mutex);
2313 }
2314
2315 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2316                                 const u8 *bssid)
2317 {
2318         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2319                 return;
2320
2321         if (iwlwifi_mod_params.uapsd_disable) {
2322                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2323                 return;
2324         }
2325
2326         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2327 }
2328
2329 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2330                                  struct ieee80211_vif *vif,
2331                                  struct ieee80211_sta *sta,
2332                                  enum ieee80211_sta_state old_state,
2333                                  enum ieee80211_sta_state new_state)
2334 {
2335         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2336         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2337         int ret;
2338
2339         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2340                            sta->addr, old_state, new_state);
2341
2342         /* this would be a mac80211 bug ... but don't crash */
2343         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2344                 return -EINVAL;
2345
2346         /* if a STA is being removed, reuse its ID */
2347         flush_work(&mvm->sta_drained_wk);
2348
2349         mutex_lock(&mvm->mutex);
2350         if (old_state == IEEE80211_STA_NOTEXIST &&
2351             new_state == IEEE80211_STA_NONE) {
2352                 /*
2353                  * Firmware bug - it'll crash if the beacon interval is less
2354                  * than 16. We can't avoid connecting at all, so refuse the
2355                  * station state change, this will cause mac80211 to abandon
2356                  * attempts to connect to this AP, and eventually wpa_s will
2357                  * blacklist the AP...
2358                  */
2359                 if (vif->type == NL80211_IFTYPE_STATION &&
2360                     vif->bss_conf.beacon_int < 16) {
2361                         IWL_ERR(mvm,
2362                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2363                                 sta->addr, vif->bss_conf.beacon_int);
2364                         ret = -EINVAL;
2365                         goto out_unlock;
2366                 }
2367
2368                 if (sta->tdls &&
2369                     (vif->p2p ||
2370                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2371                                                 IWL_MVM_TDLS_STA_COUNT ||
2372                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2373                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2374                         ret = -EBUSY;
2375                         goto out_unlock;
2376                 }
2377
2378                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2379                 if (sta->tdls && ret == 0)
2380                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2381         } else if (old_state == IEEE80211_STA_NONE &&
2382                    new_state == IEEE80211_STA_AUTH) {
2383                 /*
2384                  * EBS may be disabled due to previous failures reported by FW.
2385                  * Reset EBS status here assuming environment has been changed.
2386                  */
2387                 mvm->last_ebs_successful = true;
2388                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2389                 ret = 0;
2390         } else if (old_state == IEEE80211_STA_AUTH &&
2391                    new_state == IEEE80211_STA_ASSOC) {
2392                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2393                 if (ret == 0)
2394                         iwl_mvm_rs_rate_init(mvm, sta,
2395                                              mvmvif->phy_ctxt->channel->band,
2396                                              true);
2397         } else if (old_state == IEEE80211_STA_ASSOC &&
2398                    new_state == IEEE80211_STA_AUTHORIZED) {
2399
2400                 /* we don't support TDLS during DCM */
2401                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2402                         iwl_mvm_teardown_tdls_peers(mvm);
2403
2404                 /* enable beacon filtering */
2405                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2406                 ret = 0;
2407         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2408                    new_state == IEEE80211_STA_ASSOC) {
2409                 /* disable beacon filtering */
2410                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2411                 ret = 0;
2412         } else if (old_state == IEEE80211_STA_ASSOC &&
2413                    new_state == IEEE80211_STA_AUTH) {
2414                 ret = 0;
2415         } else if (old_state == IEEE80211_STA_AUTH &&
2416                    new_state == IEEE80211_STA_NONE) {
2417                 ret = 0;
2418         } else if (old_state == IEEE80211_STA_NONE &&
2419                    new_state == IEEE80211_STA_NOTEXIST) {
2420                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2421                 if (sta->tdls)
2422                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2423         } else {
2424                 ret = -EIO;
2425         }
2426  out_unlock:
2427         mutex_unlock(&mvm->mutex);
2428
2429         if (sta->tdls && ret == 0) {
2430                 if (old_state == IEEE80211_STA_NOTEXIST &&
2431                     new_state == IEEE80211_STA_NONE)
2432                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2433                 else if (old_state == IEEE80211_STA_NONE &&
2434                          new_state == IEEE80211_STA_NOTEXIST)
2435                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2436         }
2437
2438         return ret;
2439 }
2440
2441 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2442 {
2443         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2444
2445         mvm->rts_threshold = value;
2446
2447         return 0;
2448 }
2449
2450 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2451                                   struct ieee80211_vif *vif,
2452                                   struct ieee80211_sta *sta, u32 changed)
2453 {
2454         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2455
2456         if (vif->type == NL80211_IFTYPE_STATION &&
2457             changed & IEEE80211_RC_NSS_CHANGED)
2458                 iwl_mvm_sf_update(mvm, vif, false);
2459 }
2460
2461 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2462                                struct ieee80211_vif *vif, u16 ac,
2463                                const struct ieee80211_tx_queue_params *params)
2464 {
2465         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2466         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2467
2468         mvmvif->queue_params[ac] = *params;
2469
2470         /*
2471          * No need to update right away, we'll get BSS_CHANGED_QOS
2472          * The exception is P2P_DEVICE interface which needs immediate update.
2473          */
2474         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2475                 int ret;
2476
2477                 mutex_lock(&mvm->mutex);
2478                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2479                 mutex_unlock(&mvm->mutex);
2480                 return ret;
2481         }
2482         return 0;
2483 }
2484
2485 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2486                                       struct ieee80211_vif *vif)
2487 {
2488         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2489         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2490                            200 + vif->bss_conf.beacon_int);
2491         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2492                                100 + vif->bss_conf.beacon_int);
2493
2494         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2495                 return;
2496
2497         /*
2498          * iwl_mvm_protect_session() reads directly from the device
2499          * (the system time), so make sure it is available.
2500          */
2501         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2502                 return;
2503
2504         mutex_lock(&mvm->mutex);
2505         /* Try really hard to protect the session and hear a beacon */
2506         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2507         mutex_unlock(&mvm->mutex);
2508
2509         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2510 }
2511
2512 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2513                                         struct ieee80211_vif *vif,
2514                                         struct cfg80211_sched_scan_request *req,
2515                                         struct ieee80211_scan_ies *ies)
2516 {
2517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2518         int ret;
2519
2520         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2521                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2522                 if (ret)
2523                         return ret;
2524         }
2525
2526         mutex_lock(&mvm->mutex);
2527
2528         /* Newest FW fixes sched scan while connected on another interface */
2529         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2530                 if (!vif->bss_conf.idle) {
2531                         ret = -EBUSY;
2532                         goto out;
2533                 }
2534         } else if (!iwl_mvm_is_idle(mvm)) {
2535                 ret = -EBUSY;
2536                 goto out;
2537         }
2538
2539         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2540                 ret = -EBUSY;
2541                 goto out;
2542         }
2543
2544         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2545         if (ret)
2546                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2547
2548 out:
2549         mutex_unlock(&mvm->mutex);
2550         return ret;
2551 }
2552
2553 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2554                                        struct ieee80211_vif *vif)
2555 {
2556         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2557         int ret;
2558
2559         mutex_lock(&mvm->mutex);
2560         ret = iwl_mvm_scan_offload_stop(mvm, false);
2561         mutex_unlock(&mvm->mutex);
2562         iwl_mvm_wait_for_async_handlers(mvm);
2563
2564         return ret;
2565
2566 }
2567
2568 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2569                                enum set_key_cmd cmd,
2570                                struct ieee80211_vif *vif,
2571                                struct ieee80211_sta *sta,
2572                                struct ieee80211_key_conf *key)
2573 {
2574         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2575         int ret;
2576
2577         if (iwlwifi_mod_params.sw_crypto) {
2578                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2579                 return -EOPNOTSUPP;
2580         }
2581
2582         switch (key->cipher) {
2583         case WLAN_CIPHER_SUITE_TKIP:
2584                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2585                 /* fall-through */
2586         case WLAN_CIPHER_SUITE_CCMP:
2587                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2588                 break;
2589         case WLAN_CIPHER_SUITE_AES_CMAC:
2590                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2591                 break;
2592         case WLAN_CIPHER_SUITE_WEP40:
2593         case WLAN_CIPHER_SUITE_WEP104:
2594                 /* For non-client mode, only use WEP keys for TX as we probably
2595                  * don't have a station yet anyway and would then have to keep
2596                  * track of the keys, linking them to each of the clients/peers
2597                  * as they appear. For now, don't do that, for performance WEP
2598                  * offload doesn't really matter much, but we need it for some
2599                  * other offload features in client mode.
2600                  */
2601                 if (vif->type != NL80211_IFTYPE_STATION)
2602                         return 0;
2603                 break;
2604         default:
2605                 /* currently FW supports only one optional cipher scheme */
2606                 if (hw->n_cipher_schemes &&
2607                     hw->cipher_schemes->cipher == key->cipher)
2608                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2609                 else
2610                         return -EOPNOTSUPP;
2611         }
2612
2613         mutex_lock(&mvm->mutex);
2614
2615         switch (cmd) {
2616         case SET_KEY:
2617                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2618                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2619                         /*
2620                          * GTK on AP interface is a TX-only key, return 0;
2621                          * on IBSS they're per-station and because we're lazy
2622                          * we don't support them for RX, so do the same.
2623                          */
2624                         ret = 0;
2625                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2626                         break;
2627                 }
2628
2629                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2630                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2631                 if (ret) {
2632                         IWL_WARN(mvm, "set key failed\n");
2633                         /*
2634                          * can't add key for RX, but we don't need it
2635                          * in the device for TX so still return 0
2636                          */
2637                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2638                         ret = 0;
2639                 }
2640
2641                 break;
2642         case DISABLE_KEY:
2643                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2644                         ret = 0;
2645                         break;
2646                 }
2647
2648                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2649                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2650                 break;
2651         default:
2652                 ret = -EINVAL;
2653         }
2654
2655         mutex_unlock(&mvm->mutex);
2656         return ret;
2657 }
2658
2659 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2660                                         struct ieee80211_vif *vif,
2661                                         struct ieee80211_key_conf *keyconf,
2662                                         struct ieee80211_sta *sta,
2663                                         u32 iv32, u16 *phase1key)
2664 {
2665         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2666
2667         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2668                 return;
2669
2670         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2671 }
2672
2673
2674 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2675                                struct iwl_rx_packet *pkt, void *data)
2676 {
2677         struct iwl_mvm *mvm =
2678                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2679         struct iwl_hs20_roc_res *resp;
2680         int resp_len = iwl_rx_packet_payload_len(pkt);
2681         struct iwl_mvm_time_event_data *te_data = data;
2682
2683         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2684                 return true;
2685
2686         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2687                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2688                 return true;
2689         }
2690
2691         resp = (void *)pkt->data;
2692
2693         IWL_DEBUG_TE(mvm,
2694                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2695                      resp->status, resp->event_unique_id);
2696
2697         te_data->uid = le32_to_cpu(resp->event_unique_id);
2698         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2699                      te_data->uid);
2700
2701         spin_lock_bh(&mvm->time_event_lock);
2702         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2703         spin_unlock_bh(&mvm->time_event_lock);
2704
2705         return true;
2706 }
2707
2708 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2709 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2710                                     struct ieee80211_channel *channel,
2711                                     struct ieee80211_vif *vif,
2712                                     int duration)
2713 {
2714         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2715         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2716         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2717         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2718         struct iwl_notification_wait wait_time_event;
2719         struct iwl_hs20_roc_req aux_roc_req = {
2720                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2721                 .id_and_color =
2722                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2723                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2724                 /* Set the channel info data */
2725                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2726                         PHY_BAND_24 : PHY_BAND_5,
2727                 .channel_info.channel = channel->hw_value,
2728                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2729                 /* Set the time and duration */
2730                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2731                 .apply_time_max_delay =
2732                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2733                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2734          };
2735
2736         /* Set the node address */
2737         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2738
2739         lockdep_assert_held(&mvm->mutex);
2740
2741         spin_lock_bh(&mvm->time_event_lock);
2742
2743         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2744                 spin_unlock_bh(&mvm->time_event_lock);
2745                 return -EIO;
2746         }
2747
2748         te_data->vif = vif;
2749         te_data->duration = duration;
2750         te_data->id = HOT_SPOT_CMD;
2751
2752         spin_unlock_bh(&mvm->time_event_lock);
2753
2754         /*
2755          * Use a notification wait, which really just processes the
2756          * command response and doesn't wait for anything, in order
2757          * to be able to process the response and get the UID inside
2758          * the RX path. Using CMD_WANT_SKB doesn't work because it
2759          * stores the buffer and then wakes up this thread, by which
2760          * time another notification (that the time event started)
2761          * might already be processed unsuccessfully.
2762          */
2763         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2764                                    time_event_response,
2765                                    ARRAY_SIZE(time_event_response),
2766                                    iwl_mvm_rx_aux_roc, te_data);
2767
2768         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2769                                    &aux_roc_req);
2770
2771         if (res) {
2772                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2773                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2774                 goto out_clear_te;
2775         }
2776
2777         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2778         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2779         /* should never fail */
2780         WARN_ON_ONCE(res);
2781
2782         if (res) {
2783  out_clear_te:
2784                 spin_lock_bh(&mvm->time_event_lock);
2785                 iwl_mvm_te_clear_data(mvm, te_data);
2786                 spin_unlock_bh(&mvm->time_event_lock);
2787         }
2788
2789         return res;
2790 }
2791
2792 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2793                        struct ieee80211_vif *vif,
2794                        struct ieee80211_channel *channel,
2795                        int duration,
2796                        enum ieee80211_roc_type type)
2797 {
2798         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2799         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2800         struct cfg80211_chan_def chandef;
2801         struct iwl_mvm_phy_ctxt *phy_ctxt;
2802         int ret, i;
2803
2804         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2805                            duration, type);
2806
2807         mutex_lock(&mvm->mutex);
2808
2809         switch (vif->type) {
2810         case NL80211_IFTYPE_STATION:
2811                 if (mvm->fw->ucode_capa.capa[0] &
2812                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2813                         /* Use aux roc framework (HS20) */
2814                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2815                                                        vif, duration);
2816                         goto out_unlock;
2817                 }
2818                 IWL_ERR(mvm, "hotspot not supported\n");
2819                 ret = -EINVAL;
2820                 goto out_unlock;
2821         case NL80211_IFTYPE_P2P_DEVICE:
2822                 /* handle below */
2823                 break;
2824         default:
2825                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2826                 ret = -EINVAL;
2827                 goto out_unlock;
2828         }
2829
2830         for (i = 0; i < NUM_PHY_CTX; i++) {
2831                 phy_ctxt = &mvm->phy_ctxts[i];
2832                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2833                         continue;
2834
2835                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2836                         /*
2837                          * Unbind the P2P_DEVICE from the current PHY context,
2838                          * and if the PHY context is not used remove it.
2839                          */
2840                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2841                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2842                                 goto out_unlock;
2843
2844                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2845
2846                         /* Bind the P2P_DEVICE to the current PHY Context */
2847                         mvmvif->phy_ctxt = phy_ctxt;
2848
2849                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2850                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2851                                 goto out_unlock;
2852
2853                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2854                         goto schedule_time_event;
2855                 }
2856         }
2857
2858         /* Need to update the PHY context only if the ROC channel changed */
2859         if (channel == mvmvif->phy_ctxt->channel)
2860                 goto schedule_time_event;
2861
2862         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2863
2864         /*
2865          * Change the PHY context configuration as it is currently referenced
2866          * only by the P2P Device MAC
2867          */
2868         if (mvmvif->phy_ctxt->ref == 1) {
2869                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2870                                                &chandef, 1, 1);
2871                 if (ret)
2872                         goto out_unlock;
2873         } else {
2874                 /*
2875                  * The PHY context is shared with other MACs. Need to remove the
2876                  * P2P Device from the binding, allocate an new PHY context and
2877                  * create a new binding
2878                  */
2879                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2880                 if (!phy_ctxt) {
2881                         ret = -ENOSPC;
2882                         goto out_unlock;
2883                 }
2884
2885                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2886                                                1, 1);
2887                 if (ret) {
2888                         IWL_ERR(mvm, "Failed to change PHY context\n");
2889                         goto out_unlock;
2890                 }
2891
2892                 /* Unbind the P2P_DEVICE from the current PHY context */
2893                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2894                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2895                         goto out_unlock;
2896
2897                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2898
2899                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2900                 mvmvif->phy_ctxt = phy_ctxt;
2901
2902                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2903                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2904                         goto out_unlock;
2905
2906                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2907         }
2908
2909 schedule_time_event:
2910         /* Schedule the time events */
2911         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2912
2913 out_unlock:
2914         mutex_unlock(&mvm->mutex);
2915         IWL_DEBUG_MAC80211(mvm, "leave\n");
2916         return ret;
2917 }
2918
2919 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2920 {
2921         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2922
2923         IWL_DEBUG_MAC80211(mvm, "enter\n");
2924
2925         mutex_lock(&mvm->mutex);
2926         iwl_mvm_stop_roc(mvm);
2927         mutex_unlock(&mvm->mutex);
2928
2929         IWL_DEBUG_MAC80211(mvm, "leave\n");
2930         return 0;
2931 }
2932
2933 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2934                                  struct ieee80211_chanctx_conf *ctx)
2935 {
2936         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2937         struct iwl_mvm_phy_ctxt *phy_ctxt;
2938         int ret;
2939
2940         lockdep_assert_held(&mvm->mutex);
2941
2942         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2943
2944         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2945         if (!phy_ctxt) {
2946                 ret = -ENOSPC;
2947                 goto out;
2948         }
2949
2950         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2951                                        ctx->rx_chains_static,
2952                                        ctx->rx_chains_dynamic);
2953         if (ret) {
2954                 IWL_ERR(mvm, "Failed to add PHY context\n");
2955                 goto out;
2956         }
2957
2958         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2959         *phy_ctxt_id = phy_ctxt->id;
2960 out:
2961         return ret;
2962 }
2963
2964 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2965                                struct ieee80211_chanctx_conf *ctx)
2966 {
2967         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2968         int ret;
2969
2970         mutex_lock(&mvm->mutex);
2971         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2972         mutex_unlock(&mvm->mutex);
2973
2974         return ret;
2975 }
2976
2977 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2978                                      struct ieee80211_chanctx_conf *ctx)
2979 {
2980         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2981         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2982
2983         lockdep_assert_held(&mvm->mutex);
2984
2985         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2986 }
2987
2988 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2989                                    struct ieee80211_chanctx_conf *ctx)
2990 {
2991         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2992
2993         mutex_lock(&mvm->mutex);
2994         __iwl_mvm_remove_chanctx(mvm, ctx);
2995         mutex_unlock(&mvm->mutex);
2996 }
2997
2998 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2999                                    struct ieee80211_chanctx_conf *ctx,
3000                                    u32 changed)
3001 {
3002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3003         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3004         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3005
3006         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3007                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3008                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3009                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3010                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3011                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3012                       phy_ctxt->ref, changed))
3013                 return;
3014
3015         mutex_lock(&mvm->mutex);
3016         iwl_mvm_bt_coex_vif_change(mvm);
3017         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3018                                  ctx->rx_chains_static,
3019                                  ctx->rx_chains_dynamic);
3020         mutex_unlock(&mvm->mutex);
3021 }
3022
3023 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3024                                         struct ieee80211_vif *vif,
3025                                         struct ieee80211_chanctx_conf *ctx,
3026                                         bool switching_chanctx)
3027 {
3028         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3029         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3030         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3031         int ret;
3032
3033         lockdep_assert_held(&mvm->mutex);
3034
3035         mvmvif->phy_ctxt = phy_ctxt;
3036
3037         switch (vif->type) {
3038         case NL80211_IFTYPE_AP:
3039                 /* only needed if we're switching chanctx (i.e. during CSA) */
3040                 if (switching_chanctx) {
3041                         mvmvif->ap_ibss_active = true;
3042                         break;
3043                 }
3044         case NL80211_IFTYPE_ADHOC:
3045                 /*
3046                  * The AP binding flow is handled as part of the start_ap flow
3047                  * (in bss_info_changed), similarly for IBSS.
3048                  */
3049                 ret = 0;
3050                 goto out;
3051         case NL80211_IFTYPE_STATION:
3052                 break;
3053         case NL80211_IFTYPE_MONITOR:
3054                 /* always disable PS when a monitor interface is active */
3055                 mvmvif->ps_disabled = true;
3056                 break;
3057         default:
3058                 ret = -EINVAL;
3059                 goto out;
3060         }
3061
3062         ret = iwl_mvm_binding_add_vif(mvm, vif);
3063         if (ret)
3064                 goto out;
3065
3066         /*
3067          * Power state must be updated before quotas,
3068          * otherwise fw will complain.
3069          */
3070         iwl_mvm_power_update_mac(mvm);
3071
3072         /* Setting the quota at this stage is only required for monitor
3073          * interfaces. For the other types, the bss_info changed flow
3074          * will handle quota settings.
3075          */
3076         if (vif->type == NL80211_IFTYPE_MONITOR) {
3077                 mvmvif->monitor_active = true;
3078                 ret = iwl_mvm_update_quotas(mvm, NULL);
3079                 if (ret)
3080                         goto out_remove_binding;
3081         }
3082
3083         /* Handle binding during CSA */
3084         if (vif->type == NL80211_IFTYPE_AP) {
3085                 iwl_mvm_update_quotas(mvm, NULL);
3086                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3087         }
3088
3089         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3090                 u32 duration = 2 * vif->bss_conf.beacon_int;
3091
3092                 /* iwl_mvm_protect_session() reads directly from the
3093                  * device (the system time), so make sure it is
3094                  * available.
3095                  */
3096                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3097                 if (ret)
3098                         goto out_remove_binding;
3099
3100                 /* Protect the session to make sure we hear the first
3101                  * beacon on the new channel.
3102                  */
3103                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3104                                         vif->bss_conf.beacon_int / 2,
3105                                         true);
3106
3107                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3108
3109                 iwl_mvm_update_quotas(mvm, NULL);
3110         }
3111
3112         goto out;
3113
3114 out_remove_binding:
3115         iwl_mvm_binding_remove_vif(mvm, vif);
3116         iwl_mvm_power_update_mac(mvm);
3117 out:
3118         if (ret)
3119                 mvmvif->phy_ctxt = NULL;
3120         return ret;
3121 }
3122 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3123                                       struct ieee80211_vif *vif,
3124                                       struct ieee80211_chanctx_conf *ctx)
3125 {
3126         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3127         int ret;
3128
3129         mutex_lock(&mvm->mutex);
3130         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3131         mutex_unlock(&mvm->mutex);
3132
3133         return ret;
3134 }
3135
3136 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3137                                            struct ieee80211_vif *vif,
3138                                            struct ieee80211_chanctx_conf *ctx,
3139                                            bool switching_chanctx)
3140 {
3141         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3142         struct ieee80211_vif *disabled_vif = NULL;
3143
3144         lockdep_assert_held(&mvm->mutex);
3145
3146         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3147
3148         switch (vif->type) {
3149         case NL80211_IFTYPE_ADHOC:
3150                 goto out;
3151         case NL80211_IFTYPE_MONITOR:
3152                 mvmvif->monitor_active = false;
3153                 mvmvif->ps_disabled = false;
3154                 break;
3155         case NL80211_IFTYPE_AP:
3156                 /* This part is triggered only during CSA */
3157                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3158                         goto out;
3159
3160                 mvmvif->csa_countdown = false;
3161
3162                 /* Set CS bit on all the stations */
3163                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3164
3165                 /* Save blocked iface, the timeout is set on the next beacon */
3166                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3167
3168                 mvmvif->ap_ibss_active = false;
3169                 break;
3170         case NL80211_IFTYPE_STATION:
3171                 if (!switching_chanctx)
3172                         break;
3173
3174                 disabled_vif = vif;
3175
3176                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3177                 break;
3178         default:
3179                 break;
3180         }
3181
3182         iwl_mvm_update_quotas(mvm, disabled_vif);
3183         iwl_mvm_binding_remove_vif(mvm, vif);
3184
3185 out:
3186         mvmvif->phy_ctxt = NULL;
3187         iwl_mvm_power_update_mac(mvm);
3188 }
3189
3190 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3191                                          struct ieee80211_vif *vif,
3192                                          struct ieee80211_chanctx_conf *ctx)
3193 {
3194         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3195
3196         mutex_lock(&mvm->mutex);
3197         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3198         mutex_unlock(&mvm->mutex);
3199 }
3200
3201 static int
3202 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3203                                 struct ieee80211_vif_chanctx_switch *vifs)
3204 {
3205         int ret;
3206
3207         mutex_lock(&mvm->mutex);
3208         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3209         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3210
3211         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3212         if (ret) {
3213                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3214                 goto out_reassign;
3215         }
3216
3217         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3218                                            true);
3219         if (ret) {
3220                 IWL_ERR(mvm,
3221                         "failed to assign new_ctx during channel switch\n");
3222                 goto out_remove;
3223         }
3224
3225         /* we don't support TDLS during DCM - can be caused by channel switch */
3226         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3227                 iwl_mvm_teardown_tdls_peers(mvm);
3228
3229         goto out;
3230
3231 out_remove:
3232         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3233
3234 out_reassign:
3235         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3236                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3237                 goto out_restart;
3238         }
3239
3240         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3241                                          true)) {
3242                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3243                 goto out_restart;
3244         }
3245
3246         goto out;
3247
3248 out_restart:
3249         /* things keep failing, better restart the hw */
3250         iwl_mvm_nic_restart(mvm, false);
3251
3252 out:
3253         mutex_unlock(&mvm->mutex);
3254
3255         return ret;
3256 }
3257
3258 static int
3259 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3260                                     struct ieee80211_vif_chanctx_switch *vifs)
3261 {
3262         int ret;
3263
3264         mutex_lock(&mvm->mutex);
3265         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3266
3267         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3268                                            true);
3269         if (ret) {
3270                 IWL_ERR(mvm,
3271                         "failed to assign new_ctx during channel switch\n");
3272                 goto out_reassign;
3273         }
3274
3275         goto out;
3276
3277 out_reassign:
3278         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3279                                          true)) {
3280                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3281                 goto out_restart;
3282         }
3283
3284         goto out;
3285
3286 out_restart:
3287         /* things keep failing, better restart the hw */
3288         iwl_mvm_nic_restart(mvm, false);
3289
3290 out:
3291         mutex_unlock(&mvm->mutex);
3292
3293         return ret;
3294 }
3295
3296 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3297                                       struct ieee80211_vif_chanctx_switch *vifs,
3298                                       int n_vifs,
3299                                       enum ieee80211_chanctx_switch_mode mode)
3300 {
3301         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3302         int ret;
3303
3304         /* we only support a single-vif right now */
3305         if (n_vifs > 1)
3306                 return -EOPNOTSUPP;
3307
3308         switch (mode) {
3309         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3310                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3311                 break;
3312         case CHANCTX_SWMODE_REASSIGN_VIF:
3313                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3314                 break;
3315         default:
3316                 ret = -EOPNOTSUPP;
3317                 break;
3318         }
3319
3320         return ret;
3321 }
3322
3323 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3324                            struct ieee80211_sta *sta,
3325                            bool set)
3326 {
3327         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3328         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3329
3330         if (!mvm_sta || !mvm_sta->vif) {
3331                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3332                 return -EINVAL;
3333         }
3334
3335         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3336 }
3337
3338 #ifdef CONFIG_NL80211_TESTMODE
3339 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3340         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3341         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3342         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3343 };
3344
3345 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3346                                       struct ieee80211_vif *vif,
3347                                       void *data, int len)
3348 {
3349         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3350         int err;
3351         u32 noa_duration;
3352
3353         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3354         if (err)
3355                 return err;
3356
3357         if (!tb[IWL_MVM_TM_ATTR_CMD])
3358                 return -EINVAL;
3359
3360         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3361         case IWL_MVM_TM_CMD_SET_NOA:
3362                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3363                     !vif->bss_conf.enable_beacon ||
3364                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3365                         return -EINVAL;
3366
3367                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3368                 if (noa_duration >= vif->bss_conf.beacon_int)
3369                         return -EINVAL;
3370
3371                 mvm->noa_duration = noa_duration;
3372                 mvm->noa_vif = vif;
3373
3374                 return iwl_mvm_update_quotas(mvm, NULL);
3375         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3376                 /* must be associated client vif - ignore authorized */
3377                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3378                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3379                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3380                         return -EINVAL;
3381
3382                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3383                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3384                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3385         }
3386
3387         return -EOPNOTSUPP;
3388 }
3389
3390 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3391                                     struct ieee80211_vif *vif,
3392                                     void *data, int len)
3393 {
3394         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3395         int err;
3396
3397         mutex_lock(&mvm->mutex);
3398         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3399         mutex_unlock(&mvm->mutex);
3400
3401         return err;
3402 }
3403 #endif
3404
3405 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3406                                    struct ieee80211_vif *vif,
3407                                    struct ieee80211_channel_switch *chsw)
3408 {
3409         /* By implementing this operation, we prevent mac80211 from
3410          * starting its own channel switch timer, so that we can call
3411          * ieee80211_chswitch_done() ourselves at the right time
3412          * (which is when the absence time event starts).
3413          */
3414
3415         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3416                            "dummy channel switch op\n");
3417 }
3418
3419 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3420                                       struct ieee80211_vif *vif,
3421                                       struct ieee80211_channel_switch *chsw)
3422 {
3423         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3424         struct ieee80211_vif *csa_vif;
3425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3426         u32 apply_time;
3427         int ret;
3428
3429         mutex_lock(&mvm->mutex);
3430
3431         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3432                            chsw->chandef.center_freq1);
3433
3434         switch (vif->type) {
3435         case NL80211_IFTYPE_AP:
3436                 csa_vif =
3437                         rcu_dereference_protected(mvm->csa_vif,
3438                                                   lockdep_is_held(&mvm->mutex));
3439                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3440                               "Another CSA is already in progress")) {
3441                         ret = -EBUSY;
3442                         goto out_unlock;
3443                 }
3444
3445                 rcu_assign_pointer(mvm->csa_vif, vif);
3446
3447                 if (WARN_ONCE(mvmvif->csa_countdown,
3448                               "Previous CSA countdown didn't complete")) {
3449                         ret = -EBUSY;
3450                         goto out_unlock;
3451                 }
3452
3453                 break;
3454         case NL80211_IFTYPE_STATION:
3455                 /* Schedule the time event to a bit before beacon 1,
3456                  * to make sure we're in the new channel when the
3457                  * GO/AP arrives.
3458                  */
3459                 apply_time = chsw->device_timestamp +
3460                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3461                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3462
3463                 if (chsw->block_tx)
3464                         iwl_mvm_csa_client_absent(mvm, vif);
3465
3466                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3467                                             apply_time);
3468                 if (mvmvif->bf_data.bf_enabled) {
3469                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3470                         if (ret)
3471                                 goto out_unlock;
3472                 }
3473
3474                 break;
3475         default:
3476                 break;
3477         }
3478
3479         mvmvif->ps_disabled = true;
3480
3481         ret = iwl_mvm_power_update_ps(mvm);
3482         if (ret)
3483                 goto out_unlock;
3484
3485         /* we won't be on this channel any longer */
3486         iwl_mvm_teardown_tdls_peers(mvm);
3487
3488 out_unlock:
3489         mutex_unlock(&mvm->mutex);
3490
3491         return ret;
3492 }
3493
3494 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3495                                        struct ieee80211_vif *vif)
3496 {
3497         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3498         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3499         int ret;
3500
3501         mutex_lock(&mvm->mutex);
3502
3503         if (vif->type == NL80211_IFTYPE_STATION) {
3504                 struct iwl_mvm_sta *mvmsta;
3505
3506                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3507                                                           mvmvif->ap_sta_id);
3508
3509                 if (WARN_ON(!mvmsta)) {
3510                         ret = -EIO;
3511                         goto out_unlock;
3512                 }
3513
3514                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3515
3516                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3517
3518                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3519                 if (ret)
3520                         goto out_unlock;
3521
3522                 iwl_mvm_stop_session_protection(mvm, vif);
3523         }
3524
3525         mvmvif->ps_disabled = false;
3526
3527         ret = iwl_mvm_power_update_ps(mvm);
3528
3529 out_unlock:
3530         mutex_unlock(&mvm->mutex);
3531
3532         return ret;
3533 }
3534
3535 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3536                               struct ieee80211_vif *vif, u32 queues, bool drop)
3537 {
3538         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3539         struct iwl_mvm_vif *mvmvif;
3540         struct iwl_mvm_sta *mvmsta;
3541         struct ieee80211_sta *sta;
3542         int i;
3543         u32 msk = 0;
3544
3545         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3546                 return;
3547
3548         mutex_lock(&mvm->mutex);
3549         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3550
3551         /* flush the AP-station and all TDLS peers */
3552         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3553                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3554                                                 lockdep_is_held(&mvm->mutex));
3555                 if (IS_ERR_OR_NULL(sta))
3556                         continue;
3557
3558                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3559                 if (mvmsta->vif != vif)
3560                         continue;
3561
3562                 /* make sure only TDLS peers or the AP are flushed */
3563                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3564
3565                 msk |= mvmsta->tfd_queue_msk;
3566         }
3567
3568         if (drop) {
3569                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3570                         IWL_ERR(mvm, "flush request fail\n");
3571                 mutex_unlock(&mvm->mutex);
3572         } else {
3573                 mutex_unlock(&mvm->mutex);
3574
3575                 /* this can take a while, and we may need/want other operations
3576                  * to succeed while doing this, so do it without the mutex held
3577                  */
3578                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3579         }
3580 }
3581
3582 const struct ieee80211_ops iwl_mvm_hw_ops = {
3583         .tx = iwl_mvm_mac_tx,
3584         .ampdu_action = iwl_mvm_mac_ampdu_action,
3585         .start = iwl_mvm_mac_start,
3586         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3587         .stop = iwl_mvm_mac_stop,
3588         .add_interface = iwl_mvm_mac_add_interface,
3589         .remove_interface = iwl_mvm_mac_remove_interface,
3590         .config = iwl_mvm_mac_config,
3591         .prepare_multicast = iwl_mvm_prepare_multicast,
3592         .configure_filter = iwl_mvm_configure_filter,
3593         .bss_info_changed = iwl_mvm_bss_info_changed,
3594         .hw_scan = iwl_mvm_mac_hw_scan,
3595         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3596         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3597         .sta_state = iwl_mvm_mac_sta_state,
3598         .sta_notify = iwl_mvm_mac_sta_notify,
3599         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3600         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3601         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3602         .sta_rc_update = iwl_mvm_sta_rc_update,
3603         .conf_tx = iwl_mvm_mac_conf_tx,
3604         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3605         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3606         .flush = iwl_mvm_mac_flush,
3607         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3608         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3609         .set_key = iwl_mvm_mac_set_key,
3610         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3611         .remain_on_channel = iwl_mvm_roc,
3612         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3613         .add_chanctx = iwl_mvm_add_chanctx,
3614         .remove_chanctx = iwl_mvm_remove_chanctx,
3615         .change_chanctx = iwl_mvm_change_chanctx,
3616         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3617         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3618         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3619
3620         .start_ap = iwl_mvm_start_ap_ibss,
3621         .stop_ap = iwl_mvm_stop_ap_ibss,
3622         .join_ibss = iwl_mvm_start_ap_ibss,
3623         .leave_ibss = iwl_mvm_stop_ap_ibss,
3624
3625         .set_tim = iwl_mvm_set_tim,
3626
3627         .channel_switch = iwl_mvm_channel_switch,
3628         .pre_channel_switch = iwl_mvm_pre_channel_switch,
3629         .post_channel_switch = iwl_mvm_post_channel_switch,
3630
3631         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3632         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3633         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3634
3635         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3636
3637 #ifdef CONFIG_PM_SLEEP
3638         /* look at d3.c */
3639         .suspend = iwl_mvm_suspend,
3640         .resume = iwl_mvm_resume,
3641         .set_wakeup = iwl_mvm_set_wakeup,
3642         .set_rekey_data = iwl_mvm_set_rekey_data,
3643 #if IS_ENABLED(CONFIG_IPV6)
3644         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3645 #endif
3646         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3647 #endif
3648 };