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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  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,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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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
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 258 {
 259         iwl_mvm_ref(mvm, ref_type);
 260
 261         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 262                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 263                                 HZ)) {
 264                 WARN_ON_ONCE(1);
 265                 iwl_mvm_unref(mvm, ref_type);
 266                 return -EIO;
 267         }
 268
 269         return 0;
 270 }
 271
 272 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 273 {
 274         int i;
 275
 276         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 277         for (i = 0; i < NUM_PHY_CTX; i++) {
 278                 mvm->phy_ctxts[i].id = i;
 279                 mvm->phy_ctxts[i].ref = 0;
 280         }
 281 }
 282
 283 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 284 {
 285         struct ieee80211_hw *hw = mvm->hw;
 286         int num_mac, ret, i;
 287
 288         /* Tell mac80211 our characteristics */
 289         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 290                     IEEE80211_HW_SPECTRUM_MGMT |
 291                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 292                     IEEE80211_HW_QUEUE_CONTROL |
 293                     IEEE80211_HW_WANT_MONITOR_VIF |
 294                     IEEE80211_HW_SUPPORTS_PS |
 295                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 296                     IEEE80211_HW_AMPDU_AGGREGATION |
 297                     IEEE80211_HW_TIMING_BEACON_ONLY |
 298                     IEEE80211_HW_CONNECTION_MONITOR |
 299                     IEEE80211_HW_CHANCTX_STA_CSA |
 300                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 301
 302         hw->queues = mvm->first_agg_queue;
 303         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 304         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 305                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 306         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 307         hw->rate_control_algorithm = "iwl-mvm-rs";
 308
 309         /*
 310          * Enable 11w if advertised by firmware and software crypto
 311          * is not enabled (as the firmware will interpret some mgmt
 312          * packets, so enabling it with software crypto isn't safe)
 313          */
 314         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 315             !iwlwifi_mod_params.sw_crypto)
 316                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 317
 318         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 319             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 320             !iwlwifi_mod_params.uapsd_disable) {
 321                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 322                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 323                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 324         }
 325
 326         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 327                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 328
 329         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 330         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 331         hw->chanctx_data_size = sizeof(u16);
 332
 333         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 334                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 335                 BIT(NL80211_IFTYPE_AP) |
 336                 BIT(NL80211_IFTYPE_P2P_GO) |
 337                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 338                 BIT(NL80211_IFTYPE_ADHOC);
 339
 340         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 341         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 342                                        REGULATORY_DISABLE_BEACON_HINTS;
 343
 344         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 345                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 346
 347         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 348                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 349
 350         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 351         hw->wiphy->n_iface_combinations =
 352                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 353
 354         hw->wiphy->max_remain_on_channel_duration = 10000;
 355         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 356
 357         /* Extract MAC address */
 358         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 359         hw->wiphy->addresses = mvm->addresses;
 360         hw->wiphy->n_addresses = 1;
 361
 362         /* Extract additional MAC addresses if available */
 363         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 364                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 365
 366         for (i = 1; i < num_mac; i++) {
 367                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 368                        ETH_ALEN);
 369                 mvm->addresses[i].addr[5]++;
 370                 hw->wiphy->n_addresses++;
 371         }
 372
 373         iwl_mvm_reset_phy_ctxts(mvm);
 374
 375         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 376
 377         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 378
 379         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 380                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 381                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 382         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 383                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 384                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 385
 386         hw->wiphy->hw_version = mvm->trans->hw_id;
 387
 388         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 389                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 390         else
 391                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 392
 393         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 394                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 395                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 396                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 397                 /* we create the 802.11 header and zero length SSID IE. */
 398                 hw->wiphy->max_sched_scan_ie_len =
 399                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 400         }
 401
 402         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 403                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 404                                NL80211_FEATURE_P2P_GO_OPPPS |
 405                                NL80211_FEATURE_DYNAMIC_SMPS |
 406                                NL80211_FEATURE_STATIC_SMPS;
 407
 408         if (mvm->fw->ucode_capa.capa[0] &
 409             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 410                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 411         if (mvm->fw->ucode_capa.capa[0] &
 412             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 413                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 414
 415         if (mvm->fw->ucode_capa.capa[0] &
 416             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 417                 hw->wiphy->features |=
 418                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 419
 420         if (mvm->fw->ucode_capa.capa[0] &
 421             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 422                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 423
 424         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 425
 426         /* currently FW API supports only one optional cipher scheme */
 427         if (mvm->fw->cs[0].cipher) {
 428                 mvm->hw->n_cipher_schemes = 1;
 429                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 430         }
 431
 432 #ifdef CONFIG_PM_SLEEP
 433         if (iwl_mvm_is_d0i3_supported(mvm) &&
 434             device_can_wakeup(mvm->trans->dev)) {
 435                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 436                 hw->wiphy->wowlan = &mvm->wowlan;
 437         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 438             mvm->trans->ops->d3_suspend &&
 439             mvm->trans->ops->d3_resume &&
 440             device_can_wakeup(mvm->trans->dev)) {
 441                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 442                                     WIPHY_WOWLAN_DISCONNECT |
 443                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 444                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 445                 if (!iwlwifi_mod_params.sw_crypto)
 446                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 447                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 448                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 449
 450                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 451                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 452                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 453                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 454                 hw->wiphy->wowlan = &mvm->wowlan;
 455         }
 456 #endif
 457
 458 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 459         /* assign default bcast filtering configuration */
 460         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 461 #endif
 462
 463         ret = iwl_mvm_leds_init(mvm);
 464         if (ret)
 465                 return ret;
 466
 467         ret = ieee80211_register_hw(mvm->hw);
 468         if (ret)
 469                 iwl_mvm_leds_exit(mvm);
 470
 471         return ret;
 472 }
 473
 474 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 475                              struct ieee80211_sta *sta,
 476                              struct sk_buff *skb)
 477 {
 478         struct iwl_mvm_sta *mvmsta;
 479         bool defer = false;
 480
 481         /*
 482          * double check the IN_D0I3 flag both before and after
 483          * taking the spinlock, in order to prevent taking
 484          * the spinlock when not needed.
 485          */
 486         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 487                 return false;
 488
 489         spin_lock(&mvm->d0i3_tx_lock);
 490         /*
 491          * testing the flag again ensures the skb dequeue
 492          * loop (on d0i3 exit) hasn't run yet.
 493          */
 494         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 495                 goto out;
 496
 497         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 498         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 499             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 500                 goto out;
 501
 502         __skb_queue_tail(&mvm->d0i3_tx, skb);
 503         ieee80211_stop_queues(mvm->hw);
 504
 505         /* trigger wakeup */
 506         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 507         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 508
 509         defer = true;
 510 out:
 511         spin_unlock(&mvm->d0i3_tx_lock);
 512         return defer;
 513 }
 514
 515 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 516                            struct ieee80211_tx_control *control,
 517                            struct sk_buff *skb)
 518 {
 519         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 520         struct ieee80211_sta *sta = control->sta;
 521         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 522         struct ieee80211_hdr *hdr = (void *)skb->data;
 523
 524         if (iwl_mvm_is_radio_killed(mvm)) {
 525                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 526                 goto drop;
 527         }
 528
 529         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 530             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 531             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 532                 goto drop;
 533
 534         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 535         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 536                      ieee80211_is_mgmt(hdr->frame_control) &&
 537                      !ieee80211_is_deauth(hdr->frame_control) &&
 538                      !ieee80211_is_disassoc(hdr->frame_control) &&
 539                      !ieee80211_is_action(hdr->frame_control)))
 540                 sta = NULL;
 541
 542         if (sta) {
 543                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 544                         return;
 545                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 546                         goto drop;
 547                 return;
 548         }
 549
 550         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 551                 goto drop;
 552         return;
 553  drop:
 554         ieee80211_free_txskb(hw, skb);
 555 }
 556
 557 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 558 {
 559         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 560                 return false;
 561         return true;
 562 }
 563
 564 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 565 {
 566         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 567                 return false;
 568         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 569                 return true;
 570
 571         /* enabled by default */
 572         return true;
 573 }
 574
 575 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 576                                     struct ieee80211_vif *vif,
 577                                     enum ieee80211_ampdu_mlme_action action,
 578                                     struct ieee80211_sta *sta, u16 tid,
 579                                     u16 *ssn, u8 buf_size)
 580 {
 581         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 582         int ret;
 583         bool tx_agg_ref = false;
 584
 585         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 586                      sta->addr, tid, action);
 587
 588         if (!(mvm->nvm_data->sku_cap_11n_enable))
 589                 return -EACCES;
 590
 591         /* return from D0i3 before starting a new Tx aggregation */
 592         switch (action) {
 593         case IEEE80211_AMPDU_TX_START:
 594         case IEEE80211_AMPDU_TX_STOP_CONT:
 595         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 596         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 597         case IEEE80211_AMPDU_TX_OPERATIONAL:
 598                 /*
 599                  * for tx start, wait synchronously until D0i3 exit to
 600                  * get the correct sequence number for the tid.
 601                  * additionally, some other ampdu actions use direct
 602                  * target access, which is not handled automatically
 603                  * by the trans layer (unlike commands), so wait for
 604                  * d0i3 exit in these cases as well.
 605                  */
 606                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 607                 if (ret)
 608                         return ret;
 609
 610                 tx_agg_ref = true;
 611                 break;
 612         default:
 613                 break;
 614         }
 615
 616         mutex_lock(&mvm->mutex);
 617
 618         switch (action) {
 619         case IEEE80211_AMPDU_RX_START:
 620                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 621                         ret = -EINVAL;
 622                         break;
 623                 }
 624                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 625                 break;
 626         case IEEE80211_AMPDU_RX_STOP:
 627                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 628                 break;
 629         case IEEE80211_AMPDU_TX_START:
 630                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 631                         ret = -EINVAL;
 632                         break;
 633                 }
 634                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 635                 break;
 636         case IEEE80211_AMPDU_TX_STOP_CONT:
 637                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 638                 break;
 639         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 640         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 641                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 642                 break;
 643         case IEEE80211_AMPDU_TX_OPERATIONAL:
 644                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 645                 break;
 646         default:
 647                 WARN_ON_ONCE(1);
 648                 ret = -EINVAL;
 649                 break;
 650         }
 651         mutex_unlock(&mvm->mutex);
 652
 653         /*
 654          * If the tid is marked as started, we won't use it for offloaded
 655          * traffic on the next D0i3 entry. It's safe to unref.
 656          */
 657         if (tx_agg_ref)
 658                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 659
 660         return ret;
 661 }
 662
 663 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 664                                      struct ieee80211_vif *vif)
 665 {
 666         struct iwl_mvm *mvm = data;
 667         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 668
 669         mvmvif->uploaded = false;
 670         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 671
 672         /* does this make sense at all? */
 673         mvmvif->color++;
 674
 675         spin_lock_bh(&mvm->time_event_lock);
 676         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 677         spin_unlock_bh(&mvm->time_event_lock);
 678
 679         mvmvif->phy_ctxt = NULL;
 680         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 681 }
 682
 683 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 684                                      const void *data, size_t datalen)
 685 {
 686         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 687         ssize_t bytes_read;
 688         ssize_t bytes_read_trans;
 689
 690         if (offset < dump_ptrs->op_mode_len) {
 691                 bytes_read = min_t(ssize_t, count,
 692                                    dump_ptrs->op_mode_len - offset);
 693                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 694                        bytes_read);
 695                 offset += bytes_read;
 696                 count -= bytes_read;
 697
 698                 if (count == 0)
 699                         return bytes_read;
 700         } else {
 701                 bytes_read = 0;
 702         }
 703
 704         if (!dump_ptrs->trans_ptr)
 705                 return bytes_read;
 706
 707         offset -= dump_ptrs->op_mode_len;
 708         bytes_read_trans = min_t(ssize_t, count,
 709                                  dump_ptrs->trans_ptr->len - offset);
 710         memcpy(buffer + bytes_read,
 711                (u8 *)dump_ptrs->trans_ptr->data + offset,
 712                bytes_read_trans);
 713
 714         return bytes_read + bytes_read_trans;
 715 }
 716
 717 static void iwl_mvm_free_coredump(const void *data)
 718 {
 719         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 720
 721         vfree(fw_error_dump->op_mode_ptr);
 722         vfree(fw_error_dump->trans_ptr);
 723         kfree(fw_error_dump);
 724 }
 725
 726 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 727 {
 728         struct iwl_fw_error_dump_file *dump_file;
 729         struct iwl_fw_error_dump_data *dump_data;
 730         struct iwl_fw_error_dump_info *dump_info;
 731         struct iwl_mvm_dump_ptrs *fw_error_dump;
 732         const struct fw_img *img;
 733         u32 sram_len, sram_ofs;
 734         u32 file_len, rxf_len;
 735         unsigned long flags;
 736         int reg_val;
 737
 738         lockdep_assert_held(&mvm->mutex);
 739
 740         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 741         if (!fw_error_dump)
 742                 return;
 743
 744         img = &mvm->fw->img[mvm->cur_ucode];
 745         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 746         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 747
 748         /* reading buffer size */
 749         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 750         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 751
 752         /* the register holds the value divided by 128 */
 753         rxf_len = rxf_len << 7;
 754
 755         file_len = sizeof(*dump_file) +
 756                    sizeof(*dump_data) * 3 +
 757                    sram_len +
 758                    rxf_len +
 759                    sizeof(*dump_info);
 760
 761         dump_file = vzalloc(file_len);
 762         if (!dump_file) {
 763                 kfree(fw_error_dump);
 764                 return;
 765         }
 766
 767         fw_error_dump->op_mode_ptr = dump_file;
 768
 769         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 770         dump_data = (void *)dump_file->data;
 771
 772         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 773         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 774         dump_info = (void *) dump_data->data;
 775         dump_info->device_family =
 776                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 777                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 778                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 779         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 780                sizeof(dump_info->fw_human_readable));
 781         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 782                 sizeof(dump_info->dev_human_readable));
 783         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 784                 sizeof(dump_info->bus_human_readable));
 785
 786         dump_data = iwl_fw_error_next_data(dump_data);
 787         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 788         dump_data->len = cpu_to_le32(rxf_len);
 789
 790         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 791                 u32 *rxf = (void *)dump_data->data;
 792                 int i;
 793
 794                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 795                         iwl_trans_write_prph(mvm->trans,
 796                                              RXF_LD_FENCE_OFFSET_ADDR,
 797                                              i * sizeof(u32));
 798                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 799                                                      RXF_FIFO_RD_FENCE_ADDR);
 800                 }
 801                 iwl_trans_release_nic_access(mvm->trans, &flags);
 802         }
 803
 804         dump_data = iwl_fw_error_next_data(dump_data);
 805         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 806         dump_data->len = cpu_to_le32(sram_len);
 807         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 808                                  sram_len);
 809
 810         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 811         fw_error_dump->op_mode_len = file_len;
 812         if (fw_error_dump->trans_ptr)
 813                 file_len += fw_error_dump->trans_ptr->len;
 814         dump_file->file_len = cpu_to_le32(file_len);
 815
 816         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 817                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 818 }
 819
 820 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 821 {
 822         iwl_mvm_fw_error_dump(mvm);
 823
 824         iwl_trans_stop_device(mvm->trans);
 825
 826         mvm->scan_status = IWL_MVM_SCAN_NONE;
 827         mvm->ps_disabled = false;
 828         mvm->calibrating = false;
 829
 830         /* just in case one was running */
 831         ieee80211_remain_on_channel_expired(mvm->hw);
 832
 833         ieee80211_iterate_active_interfaces_atomic(
 834                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 835                 iwl_mvm_cleanup_iterator, mvm);
 836
 837         mvm->p2p_device_vif = NULL;
 838         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 839
 840         iwl_mvm_reset_phy_ctxts(mvm);
 841         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 842         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 843         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 844         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 845         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 846         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 847         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 848         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 849
 850         ieee80211_wake_queues(mvm->hw);
 851
 852         /* cleanup all stale references (scan, roc), but keep the
 853          * ucode_down ref until reconfig is complete */
 854         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 855
 856         /* clear any stale d0i3 state */
 857         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 858
 859         mvm->vif_count = 0;
 860         mvm->rx_ba_sessions = 0;
 861 }
 862
 863 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 864 {
 865         int ret;
 866
 867         lockdep_assert_held(&mvm->mutex);
 868
 869         /* Clean up some internal and mac80211 state on restart */
 870         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 871                 iwl_mvm_restart_cleanup(mvm);
 872
 873         ret = iwl_mvm_up(mvm);
 874
 875         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 876                 /* Something went wrong - we need to finish some cleanup
 877                  * that normally iwl_mvm_mac_restart_complete() below
 878                  * would do.
 879                  */
 880                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 881                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 882         }
 883
 884         return ret;
 885 }
 886
 887 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 888 {
 889         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 890         int ret;
 891
 892         mutex_lock(&mvm->mutex);
 893         ret = __iwl_mvm_mac_start(mvm);
 894         mutex_unlock(&mvm->mutex);
 895
 896         return ret;
 897 }
 898
 899 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 900 {
 901         int ret;
 902
 903         mutex_lock(&mvm->mutex);
 904
 905         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 906         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 907         ret = iwl_mvm_update_quotas(mvm, NULL);
 908         if (ret)
 909                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 910                         ret);
 911
 912         /* allow transport/FW low power modes */
 913         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 914
 915         mutex_unlock(&mvm->mutex);
 916 }
 917
 918 static void
 919 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 920                               enum ieee80211_reconfig_type reconfig_type)
 921 {
 922         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 923
 924         switch (reconfig_type) {
 925         case IEEE80211_RECONFIG_TYPE_RESTART:
 926                 iwl_mvm_restart_complete(mvm);
 927                 break;
 928         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 929                 break;
 930         }
 931 }
 932
 933 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 934 {
 935         lockdep_assert_held(&mvm->mutex);
 936
 937         /* disallow low power states when the FW is down */
 938         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 939
 940         /* async_handlers_wk is now blocked */
 941
 942         /*
 943          * The work item could be running or queued if the
 944          * ROC time event stops just as we get here.
 945          */
 946         cancel_work_sync(&mvm->roc_done_wk);
 947
 948         iwl_trans_stop_device(mvm->trans);
 949
 950         iwl_mvm_async_handlers_purge(mvm);
 951         /* async_handlers_list is empty and will stay empty: HW is stopped */
 952
 953         /* the fw is stopped, the aux sta is dead: clean up driver state */
 954         iwl_mvm_del_aux_sta(mvm);
 955
 956         mvm->ucode_loaded = false;
 957 }
 958
 959 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 960 {
 961         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 962
 963         flush_work(&mvm->d0i3_exit_work);
 964         flush_work(&mvm->async_handlers_wk);
 965         flush_work(&mvm->fw_error_dump_wk);
 966
 967         mutex_lock(&mvm->mutex);
 968         __iwl_mvm_mac_stop(mvm);
 969         mutex_unlock(&mvm->mutex);
 970
 971         /*
 972          * The worker might have been waiting for the mutex, let it run and
 973          * discover that its list is now empty.
 974          */
 975         cancel_work_sync(&mvm->async_handlers_wk);
 976 }
 977
 978 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 979 {
 980         u16 i;
 981
 982         lockdep_assert_held(&mvm->mutex);
 983
 984         for (i = 0; i < NUM_PHY_CTX; i++)
 985                 if (!mvm->phy_ctxts[i].ref)
 986                         return &mvm->phy_ctxts[i];
 987
 988         IWL_ERR(mvm, "No available PHY context\n");
 989         return NULL;
 990 }
 991
 992 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 993                                 s8 tx_power)
 994 {
 995         /* FW is in charge of regulatory enforcement */
 996         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 997                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 998                 .pwr_restriction = cpu_to_le16(tx_power),
 999         };
1000
1001         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1002                                     sizeof(reduce_txpwr_cmd),
1003                                     &reduce_txpwr_cmd);
1004 }
1005
1006 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1007                                      struct ieee80211_vif *vif)
1008 {
1009         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1010         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1011         int ret;
1012
1013         /*
1014          * make sure D0i3 exit is completed, otherwise a target access
1015          * during tx queue configuration could be done when still in
1016          * D0i3 state.
1017          */
1018         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1019         if (ret)
1020                 return ret;
1021
1022         /*
1023          * Not much to do here. The stack will not allow interface
1024          * types or combinations that we didn't advertise, so we
1025          * don't really have to check the types.
1026          */
1027
1028         mutex_lock(&mvm->mutex);
1029
1030         /* Allocate resources for the MAC context, and add it to the fw  */
1031         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1032         if (ret)
1033                 goto out_unlock;
1034
1035         /* Counting number of interfaces is needed for legacy PM */
1036         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1037                 mvm->vif_count++;
1038
1039         /*
1040          * The AP binding flow can be done only after the beacon
1041          * template is configured (which happens only in the mac80211
1042          * start_ap() flow), and adding the broadcast station can happen
1043          * only after the binding.
1044          * In addition, since modifying the MAC before adding a bcast
1045          * station is not allowed by the FW, delay the adding of MAC context to
1046          * the point where we can also add the bcast station.
1047          * In short: there's not much we can do at this point, other than
1048          * allocating resources :)
1049          */
1050         if (vif->type == NL80211_IFTYPE_AP ||
1051             vif->type == NL80211_IFTYPE_ADHOC) {
1052                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1053                 if (ret) {
1054                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1055                         goto out_release;
1056                 }
1057
1058                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1059                 goto out_unlock;
1060         }
1061
1062         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1063         if (ret)
1064                 goto out_release;
1065
1066         ret = iwl_mvm_power_update_mac(mvm);
1067         if (ret)
1068                 goto out_release;
1069
1070         /* beacon filtering */
1071         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1072         if (ret)
1073                 goto out_remove_mac;
1074
1075         if (!mvm->bf_allowed_vif &&
1076             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1077                 mvm->bf_allowed_vif = mvmvif;
1078                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1079                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1080         }
1081
1082         /*
1083          * P2P_DEVICE interface does not have a channel context assigned to it,
1084          * so a dedicated PHY context is allocated to it and the corresponding
1085          * MAC context is bound to it at this stage.
1086          */
1087         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1088
1089                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1090                 if (!mvmvif->phy_ctxt) {
1091                         ret = -ENOSPC;
1092                         goto out_free_bf;
1093                 }
1094
1095                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1096                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1097                 if (ret)
1098                         goto out_unref_phy;
1099
1100                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1101                 if (ret)
1102                         goto out_unbind;
1103
1104                 /* Save a pointer to p2p device vif, so it can later be used to
1105                  * update the p2p device MAC when a GO is started/stopped */
1106                 mvm->p2p_device_vif = vif;
1107         }
1108
1109         iwl_mvm_vif_dbgfs_register(mvm, vif);
1110         goto out_unlock;
1111
1112  out_unbind:
1113         iwl_mvm_binding_remove_vif(mvm, vif);
1114  out_unref_phy:
1115         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1116  out_free_bf:
1117         if (mvm->bf_allowed_vif == mvmvif) {
1118                 mvm->bf_allowed_vif = NULL;
1119                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1120                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1121         }
1122  out_remove_mac:
1123         mvmvif->phy_ctxt = NULL;
1124         iwl_mvm_mac_ctxt_remove(mvm, vif);
1125  out_release:
1126         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1127                 mvm->vif_count--;
1128
1129         iwl_mvm_mac_ctxt_release(mvm, vif);
1130  out_unlock:
1131         mutex_unlock(&mvm->mutex);
1132
1133         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1134
1135         return ret;
1136 }
1137
1138 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1139                                         struct ieee80211_vif *vif)
1140 {
1141         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1142
1143         if (tfd_msk) {
1144                 mutex_lock(&mvm->mutex);
1145                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1146                 mutex_unlock(&mvm->mutex);
1147         }
1148
1149         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1150                 /*
1151                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1152                  * We assume here that all the packets sent to the OFFCHANNEL
1153                  * queue are sent in ROC session.
1154                  */
1155                 flush_work(&mvm->roc_done_wk);
1156         } else {
1157                 /*
1158                  * By now, all the AC queues are empty. The AGG queues are
1159                  * empty too. We already got all the Tx responses for all the
1160                  * packets in the queues. The drain work can have been
1161                  * triggered. Flush it.
1162                  */
1163                 flush_work(&mvm->sta_drained_wk);
1164         }
1165 }
1166
1167 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1168                                          struct ieee80211_vif *vif)
1169 {
1170         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1171         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1172
1173         iwl_mvm_prepare_mac_removal(mvm, vif);
1174
1175         mutex_lock(&mvm->mutex);
1176
1177         if (mvm->bf_allowed_vif == mvmvif) {
1178                 mvm->bf_allowed_vif = NULL;
1179                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1180                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1181         }
1182
1183         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1184
1185         /*
1186          * For AP/GO interface, the tear down of the resources allocated to the
1187          * interface is be handled as part of the stop_ap flow.
1188          */
1189         if (vif->type == NL80211_IFTYPE_AP ||
1190             vif->type == NL80211_IFTYPE_ADHOC) {
1191 #ifdef CONFIG_NL80211_TESTMODE
1192                 if (vif == mvm->noa_vif) {
1193                         mvm->noa_vif = NULL;
1194                         mvm->noa_duration = 0;
1195                 }
1196 #endif
1197                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1198                 goto out_release;
1199         }
1200
1201         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1202                 mvm->p2p_device_vif = NULL;
1203                 iwl_mvm_rm_bcast_sta(mvm, vif);
1204                 iwl_mvm_binding_remove_vif(mvm, vif);
1205                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1206                 mvmvif->phy_ctxt = NULL;
1207         }
1208
1209         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1210                 mvm->vif_count--;
1211
1212         iwl_mvm_power_update_mac(mvm);
1213         iwl_mvm_mac_ctxt_remove(mvm, vif);
1214
1215 out_release:
1216         iwl_mvm_mac_ctxt_release(mvm, vif);
1217         mutex_unlock(&mvm->mutex);
1218 }
1219
1220 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1221 {
1222         return 0;
1223 }
1224
1225 struct iwl_mvm_mc_iter_data {
1226         struct iwl_mvm *mvm;
1227         int port_id;
1228 };
1229
1230 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1231                                       struct ieee80211_vif *vif)
1232 {
1233         struct iwl_mvm_mc_iter_data *data = _data;
1234         struct iwl_mvm *mvm = data->mvm;
1235         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1236         int ret, len;
1237
1238         /* if we don't have free ports, mcast frames will be dropped */
1239         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1240                 return;
1241
1242         if (vif->type != NL80211_IFTYPE_STATION ||
1243             !vif->bss_conf.assoc)
1244                 return;
1245
1246         cmd->port_id = data->port_id++;
1247         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1248         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1249
1250         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1251         if (ret)
1252                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1253 }
1254
1255 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1256 {
1257         struct iwl_mvm_mc_iter_data iter_data = {
1258                 .mvm = mvm,
1259         };
1260
1261         lockdep_assert_held(&mvm->mutex);
1262
1263         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1264                 return;
1265
1266         ieee80211_iterate_active_interfaces_atomic(
1267                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1268                 iwl_mvm_mc_iface_iterator, &iter_data);
1269 }
1270
1271 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1272                                      struct netdev_hw_addr_list *mc_list)
1273 {
1274         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1275         struct iwl_mcast_filter_cmd *cmd;
1276         struct netdev_hw_addr *addr;
1277         int addr_count;
1278         bool pass_all;
1279         int len;
1280
1281         addr_count = netdev_hw_addr_list_count(mc_list);
1282         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1283                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1284         if (pass_all)
1285                 addr_count = 0;
1286
1287         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1288         cmd = kzalloc(len, GFP_ATOMIC);
1289         if (!cmd)
1290                 return 0;
1291
1292         if (pass_all) {
1293                 cmd->pass_all = 1;
1294                 return (u64)(unsigned long)cmd;
1295         }
1296
1297         netdev_hw_addr_list_for_each(addr, mc_list) {
1298                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1299                                    cmd->count, addr->addr);
1300                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1301                        addr->addr, ETH_ALEN);
1302                 cmd->count++;
1303         }
1304
1305         return (u64)(unsigned long)cmd;
1306 }
1307
1308 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1309                                      unsigned int changed_flags,
1310                                      unsigned int *total_flags,
1311                                      u64 multicast)
1312 {
1313         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1314         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1315
1316         mutex_lock(&mvm->mutex);
1317
1318         /* replace previous configuration */
1319         kfree(mvm->mcast_filter_cmd);
1320         mvm->mcast_filter_cmd = cmd;
1321
1322         if (!cmd)
1323                 goto out;
1324
1325         iwl_mvm_recalc_multicast(mvm);
1326 out:
1327         mutex_unlock(&mvm->mutex);
1328         *total_flags = 0;
1329 }
1330
1331 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1332 struct iwl_bcast_iter_data {
1333         struct iwl_mvm *mvm;
1334         struct iwl_bcast_filter_cmd *cmd;
1335         u8 current_filter;
1336 };
1337
1338 static void
1339 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1340                          const struct iwl_fw_bcast_filter *in_filter,
1341                          struct iwl_fw_bcast_filter *out_filter)
1342 {
1343         struct iwl_fw_bcast_filter_attr *attr;
1344         int i;
1345
1346         memcpy(out_filter, in_filter, sizeof(*out_filter));
1347
1348         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1349                 attr = &out_filter->attrs[i];
1350
1351                 if (!attr->mask)
1352                         break;
1353
1354                 switch (attr->reserved1) {
1355                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1356                         if (vif->bss_conf.arp_addr_cnt != 1) {
1357                                 attr->mask = 0;
1358                                 continue;
1359                         }
1360
1361                         attr->val = vif->bss_conf.arp_addr_list[0];
1362                         break;
1363                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1364                         attr->val = *(__be32 *)&vif->addr[2];
1365                         break;
1366                 default:
1367                         break;
1368                 }
1369                 attr->reserved1 = 0;
1370                 out_filter->num_attrs++;
1371         }
1372 }
1373
1374 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1375                                           struct ieee80211_vif *vif)
1376 {
1377         struct iwl_bcast_iter_data *data = _data;
1378         struct iwl_mvm *mvm = data->mvm;
1379         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1380         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1381         struct iwl_fw_bcast_mac *bcast_mac;
1382         int i;
1383
1384         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1385                 return;
1386
1387         bcast_mac = &cmd->macs[mvmvif->id];
1388
1389         /*
1390          * enable filtering only for associated stations, but not for P2P
1391          * Clients
1392          */
1393         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1394             !vif->bss_conf.assoc)
1395                 return;
1396
1397         bcast_mac->default_discard = 1;
1398
1399         /* copy all configured filters */
1400         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1401                 /*
1402                  * Make sure we don't exceed our filters limit.
1403                  * if there is still a valid filter to be configured,
1404                  * be on the safe side and just allow bcast for this mac.
1405                  */
1406                 if (WARN_ON_ONCE(data->current_filter >=
1407                                  ARRAY_SIZE(cmd->filters))) {
1408                         bcast_mac->default_discard = 0;
1409                         bcast_mac->attached_filters = 0;
1410                         break;
1411                 }
1412
1413                 iwl_mvm_set_bcast_filter(vif,
1414                                          &mvm->bcast_filters[i],
1415                                          &cmd->filters[data->current_filter]);
1416
1417                 /* skip current filter if it contains no attributes */
1418                 if (!cmd->filters[data->current_filter].num_attrs)
1419                         continue;
1420
1421                 /* attach the filter to current mac */
1422                 bcast_mac->attached_filters |=
1423                                 cpu_to_le16(BIT(data->current_filter));
1424
1425                 data->current_filter++;
1426         }
1427 }
1428
1429 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1430                                     struct iwl_bcast_filter_cmd *cmd)
1431 {
1432         struct iwl_bcast_iter_data iter_data = {
1433                 .mvm = mvm,
1434                 .cmd = cmd,
1435         };
1436
1437         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1438                 return false;
1439
1440         memset(cmd, 0, sizeof(*cmd));
1441         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1442         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1443
1444 #ifdef CONFIG_IWLWIFI_DEBUGFS
1445         /* use debugfs filters/macs if override is configured */
1446         if (mvm->dbgfs_bcast_filtering.override) {
1447                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1448                        sizeof(cmd->filters));
1449                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1450                        sizeof(cmd->macs));
1451                 return true;
1452         }
1453 #endif
1454
1455         /* if no filters are configured, do nothing */
1456         if (!mvm->bcast_filters)
1457                 return false;
1458
1459         /* configure and attach these filters for each associated sta vif */
1460         ieee80211_iterate_active_interfaces(
1461                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1462                 iwl_mvm_bcast_filter_iterator, &iter_data);
1463
1464         return true;
1465 }
1466 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1467                                           struct ieee80211_vif *vif)
1468 {
1469         struct iwl_bcast_filter_cmd cmd;
1470
1471         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1472                 return 0;
1473
1474         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1475                 return 0;
1476
1477         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1478                                     sizeof(cmd), &cmd);
1479 }
1480 #else
1481 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1482                                                  struct ieee80211_vif *vif)
1483 {
1484         return 0;
1485 }
1486 #endif
1487
1488 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1489                                              struct ieee80211_vif *vif,
1490                                              struct ieee80211_bss_conf *bss_conf,
1491                                              u32 changes)
1492 {
1493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1494         int ret;
1495
1496         /*
1497          * Re-calculate the tsf id, as the master-slave relations depend on the
1498          * beacon interval, which was not known when the station interface was
1499          * added.
1500          */
1501         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1502                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1503
1504         /*
1505          * If we're not associated yet, take the (new) BSSID before associating
1506          * so the firmware knows. If we're already associated, then use the old
1507          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1508          * branch for disassociation below.
1509          */
1510         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1511                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1512
1513         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1514         if (ret)
1515                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1516
1517         /* after sending it once, adopt mac80211 data */
1518         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1519         mvmvif->associated = bss_conf->assoc;
1520
1521         if (changes & BSS_CHANGED_ASSOC) {
1522                 if (bss_conf->assoc) {
1523                         /* add quota for this interface */
1524                         ret = iwl_mvm_update_quotas(mvm, NULL);
1525                         if (ret) {
1526                                 IWL_ERR(mvm, "failed to update quotas\n");
1527                                 return;
1528                         }
1529
1530                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1531                                      &mvm->status)) {
1532                                 /*
1533                                  * If we're restarting then the firmware will
1534                                  * obviously have lost synchronisation with
1535                                  * the AP. It will attempt to synchronise by
1536                                  * itself, but we can make it more reliable by
1537                                  * scheduling a session protection time event.
1538                                  *
1539                                  * The firmware needs to receive a beacon to
1540                                  * catch up with synchronisation, use 110% of
1541                                  * the beacon interval.
1542                                  *
1543                                  * Set a large maximum delay to allow for more
1544                                  * than a single interface.
1545                                  */
1546                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1547                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1548                                                         5 * dur, false);
1549                         }
1550
1551                         iwl_mvm_sf_update(mvm, vif, false);
1552                         iwl_mvm_power_vif_assoc(mvm, vif);
1553                         if (vif->p2p) {
1554                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1555                                 iwl_mvm_update_smps(mvm, vif,
1556                                                     IWL_MVM_SMPS_REQ_PROT,
1557                                                     IEEE80211_SMPS_DYNAMIC);
1558                         }
1559                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1560                         /*
1561                          * If update fails - SF might be running in associated
1562                          * mode while disassociated - which is forbidden.
1563                          */
1564                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1565                                   "Failed to update SF upon disassociation\n");
1566
1567                         /* remove AP station now that the MAC is unassoc */
1568                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1569                         if (ret)
1570                                 IWL_ERR(mvm, "failed to remove AP station\n");
1571
1572                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1573                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1574                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1575                         /* remove quota for this interface */
1576                         ret = iwl_mvm_update_quotas(mvm, NULL);
1577                         if (ret)
1578                                 IWL_ERR(mvm, "failed to update quotas\n");
1579
1580                         if (vif->p2p)
1581                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1582
1583                         /* this will take the cleared BSSID from bss_conf */
1584                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1585                         if (ret)
1586                                 IWL_ERR(mvm,
1587                                         "failed to update MAC %pM (clear after unassoc)\n",
1588                                         vif->addr);
1589                 }
1590
1591                 iwl_mvm_recalc_multicast(mvm);
1592                 iwl_mvm_configure_bcast_filter(mvm, vif);
1593
1594                 /* reset rssi values */
1595                 mvmvif->bf_data.ave_beacon_signal = 0;
1596
1597                 iwl_mvm_bt_coex_vif_change(mvm);
1598                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1599                                     IEEE80211_SMPS_AUTOMATIC);
1600         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1601                 /*
1602                  * We received a beacon _after_ association so
1603                  * remove the session protection.
1604                  */
1605                 iwl_mvm_remove_time_event(mvm, mvmvif,
1606                                           &mvmvif->time_event_data);
1607         }
1608
1609         if (changes & BSS_CHANGED_BEACON_INFO) {
1610                 iwl_mvm_sf_update(mvm, vif, false);
1611                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1612         }
1613
1614         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1615                 ret = iwl_mvm_power_update_mac(mvm);
1616                 if (ret)
1617                         IWL_ERR(mvm, "failed to update power mode\n");
1618         }
1619
1620         if (changes & BSS_CHANGED_TXPOWER) {
1621                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1622                                 bss_conf->txpower);
1623                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1624         }
1625
1626         if (changes & BSS_CHANGED_CQM) {
1627                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1628                 /* reset cqm events tracking */
1629                 mvmvif->bf_data.last_cqm_event = 0;
1630                 if (mvmvif->bf_data.bf_enabled) {
1631                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1632                         if (ret)
1633                                 IWL_ERR(mvm,
1634                                         "failed to update CQM thresholds\n");
1635                 }
1636         }
1637
1638         if (changes & BSS_CHANGED_ARP_FILTER) {
1639                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1640                 iwl_mvm_configure_bcast_filter(mvm, vif);
1641         }
1642 }
1643
1644 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1645                                  struct ieee80211_vif *vif)
1646 {
1647         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1648         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1649         int ret;
1650
1651         /*
1652          * iwl_mvm_mac_ctxt_add() might read directly from the device
1653          * (the system time), so make sure it is available.
1654          */
1655         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1656         if (ret)
1657                 return ret;
1658
1659         mutex_lock(&mvm->mutex);
1660
1661         /* Send the beacon template */
1662         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1663         if (ret)
1664                 goto out_unlock;
1665
1666         /*
1667          * Re-calculate the tsf id, as the master-slave relations depend on the
1668          * beacon interval, which was not known when the AP interface was added.
1669          */
1670         if (vif->type == NL80211_IFTYPE_AP)
1671                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1672
1673         /* Add the mac context */
1674         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1675         if (ret)
1676                 goto out_unlock;
1677
1678         /* Perform the binding */
1679         ret = iwl_mvm_binding_add_vif(mvm, vif);
1680         if (ret)
1681                 goto out_remove;
1682
1683         /* Send the bcast station. At this stage the TBTT and DTIM time events
1684          * are added and applied to the scheduler */
1685         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1686         if (ret)
1687                 goto out_unbind;
1688
1689         /* must be set before quota calculations */
1690         mvmvif->ap_ibss_active = true;
1691
1692         /* power updated needs to be done before quotas */
1693         iwl_mvm_power_update_mac(mvm);
1694
1695         ret = iwl_mvm_update_quotas(mvm, NULL);
1696         if (ret)
1697                 goto out_quota_failed;
1698
1699         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1700         if (vif->p2p && mvm->p2p_device_vif)
1701                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1702
1703         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1704
1705         iwl_mvm_bt_coex_vif_change(mvm);
1706
1707         /* we don't support TDLS during DCM */
1708         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1709                 iwl_mvm_teardown_tdls_peers(mvm);
1710
1711         mutex_unlock(&mvm->mutex);
1712         return 0;
1713
1714 out_quota_failed:
1715         iwl_mvm_power_update_mac(mvm);
1716         mvmvif->ap_ibss_active = false;
1717         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1718 out_unbind:
1719         iwl_mvm_binding_remove_vif(mvm, vif);
1720 out_remove:
1721         iwl_mvm_mac_ctxt_remove(mvm, vif);
1722 out_unlock:
1723         mutex_unlock(&mvm->mutex);
1724         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1725         return ret;
1726 }
1727
1728 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1729                                  struct ieee80211_vif *vif)
1730 {
1731         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1732         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1733
1734         iwl_mvm_prepare_mac_removal(mvm, vif);
1735
1736         mutex_lock(&mvm->mutex);
1737
1738         /* Handle AP stop while in CSA */
1739         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1740                 iwl_mvm_remove_time_event(mvm, mvmvif,
1741                                           &mvmvif->time_event_data);
1742                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1743         }
1744
1745         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1746                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1747                 mvm->csa_tx_block_bcn_timeout = 0;
1748         }
1749
1750         mvmvif->ap_ibss_active = false;
1751         mvm->ap_last_beacon_gp2 = 0;
1752
1753         iwl_mvm_bt_coex_vif_change(mvm);
1754
1755         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1756
1757         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1758         if (vif->p2p && mvm->p2p_device_vif)
1759                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1760
1761         iwl_mvm_update_quotas(mvm, NULL);
1762         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1763         iwl_mvm_binding_remove_vif(mvm, vif);
1764
1765         iwl_mvm_power_update_mac(mvm);
1766
1767         iwl_mvm_mac_ctxt_remove(mvm, vif);
1768
1769         mutex_unlock(&mvm->mutex);
1770 }
1771
1772 static void
1773 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1774                                  struct ieee80211_vif *vif,
1775                                  struct ieee80211_bss_conf *bss_conf,
1776                                  u32 changes)
1777 {
1778         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1779
1780         /* Changes will be applied when the AP/IBSS is started */
1781         if (!mvmvif->ap_ibss_active)
1782                 return;
1783
1784         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1785                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1786             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1787                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1788
1789         /* Need to send a new beacon template to the FW */
1790         if (changes & BSS_CHANGED_BEACON &&
1791             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1792                 IWL_WARN(mvm, "Failed updating beacon data\n");
1793
1794         if (changes & BSS_CHANGED_TXPOWER) {
1795                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1796                                 bss_conf->txpower);
1797                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1798         }
1799
1800 }
1801
1802 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1803                                      struct ieee80211_vif *vif,
1804                                      struct ieee80211_bss_conf *bss_conf,
1805                                      u32 changes)
1806 {
1807         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1808
1809         /*
1810          * iwl_mvm_bss_info_changed_station() might call
1811          * iwl_mvm_protect_session(), which reads directly from
1812          * the device (the system time), so make sure it is available.
1813          */
1814         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1815                 return;
1816
1817         mutex_lock(&mvm->mutex);
1818
1819         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1820                 iwl_mvm_scan_offload_stop(mvm, true);
1821
1822         switch (vif->type) {
1823         case NL80211_IFTYPE_STATION:
1824                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1825                 break;
1826         case NL80211_IFTYPE_AP:
1827         case NL80211_IFTYPE_ADHOC:
1828                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1829                 break;
1830         default:
1831                 /* shouldn't happen */
1832                 WARN_ON_ONCE(1);
1833         }
1834
1835         mutex_unlock(&mvm->mutex);
1836         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1837 }
1838
1839 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1840                                           enum iwl_scan_status scan_type)
1841 {
1842         int ret;
1843         bool wait_for_handlers = false;
1844
1845         mutex_lock(&mvm->mutex);
1846
1847         if (mvm->scan_status != scan_type) {
1848                 ret = 0;
1849                 /* make sure there are no pending notifications */
1850                 wait_for_handlers = true;
1851                 goto out;
1852         }
1853
1854         switch (scan_type) {
1855         case IWL_MVM_SCAN_SCHED:
1856                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1857                 break;
1858         case IWL_MVM_SCAN_OS:
1859                 ret = iwl_mvm_cancel_scan(mvm);
1860                 break;
1861         case IWL_MVM_SCAN_NONE:
1862         default:
1863                 WARN_ON_ONCE(1);
1864                 ret = -EINVAL;
1865                 break;
1866         }
1867         if (ret)
1868                 goto out;
1869
1870         wait_for_handlers = true;
1871 out:
1872         mutex_unlock(&mvm->mutex);
1873
1874         /* make sure we consume the completion notification */
1875         if (wait_for_handlers)
1876                 iwl_mvm_wait_for_async_handlers(mvm);
1877
1878         return ret;
1879 }
1880 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1881                                struct ieee80211_vif *vif,
1882                                struct ieee80211_scan_request *hw_req)
1883 {
1884         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1885         struct cfg80211_scan_request *req = &hw_req->req;
1886         int ret;
1887
1888         if (req->n_channels == 0 ||
1889             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1890                 return -EINVAL;
1891
1892         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1893         if (ret)
1894                 return ret;
1895
1896         mutex_lock(&mvm->mutex);
1897
1898         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1899                 ret = -EBUSY;
1900                 goto out;
1901         }
1902
1903         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1904
1905         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1906                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1907         else
1908                 ret = iwl_mvm_scan_request(mvm, vif, req);
1909
1910         if (ret)
1911                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1912 out:
1913         mutex_unlock(&mvm->mutex);
1914         return ret;
1915 }
1916
1917 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1918                                        struct ieee80211_vif *vif)
1919 {
1920         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1921
1922         mutex_lock(&mvm->mutex);
1923
1924         iwl_mvm_cancel_scan(mvm);
1925
1926         mutex_unlock(&mvm->mutex);
1927 }
1928
1929 static void
1930 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1931                                   struct ieee80211_sta *sta, u16 tids,
1932                                   int num_frames,
1933                                   enum ieee80211_frame_release_type reason,
1934                                   bool more_data)
1935 {
1936         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1937
1938         /* Called when we need to transmit (a) frame(s) from mac80211 */
1939
1940         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1941                                           tids, more_data, false);
1942 }
1943
1944 static void
1945 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1946                                     struct ieee80211_sta *sta, u16 tids,
1947                                     int num_frames,
1948                                     enum ieee80211_frame_release_type reason,
1949                                     bool more_data)
1950 {
1951         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1952
1953         /* Called when we need to transmit (a) frame(s) from agg queue */
1954
1955         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1956                                           tids, more_data, true);
1957 }
1958
1959 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1960                                    struct ieee80211_vif *vif,
1961                                    enum sta_notify_cmd cmd,
1962                                    struct ieee80211_sta *sta)
1963 {
1964         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1965         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1966         int tid;
1967
1968         switch (cmd) {
1969         case STA_NOTIFY_SLEEP:
1970                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1971                         ieee80211_sta_block_awake(hw, sta, true);
1972                 spin_lock_bh(&mvmsta->lock);
1973                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1974                         struct iwl_mvm_tid_data *tid_data;
1975
1976                         tid_data = &mvmsta->tid_data[tid];
1977                         if (tid_data->state != IWL_AGG_ON &&
1978                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1979                                 continue;
1980                         if (iwl_mvm_tid_queued(tid_data) == 0)
1981                                 continue;
1982                         ieee80211_sta_set_buffered(sta, tid, true);
1983                 }
1984                 spin_unlock_bh(&mvmsta->lock);
1985                 /*
1986                  * The fw updates the STA to be asleep. Tx packets on the Tx
1987                  * queues to this station will not be transmitted. The fw will
1988                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1989                  */
1990                 break;
1991         case STA_NOTIFY_AWAKE:
1992                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1993                         break;
1994                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1995                 break;
1996         default:
1997                 break;
1998         }
1999 }
2000
2001 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2002                                        struct ieee80211_vif *vif,
2003                                        struct ieee80211_sta *sta)
2004 {
2005         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2006         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2007
2008         /*
2009          * This is called before mac80211 does RCU synchronisation,
2010          * so here we already invalidate our internal RCU-protected
2011          * station pointer. The rest of the code will thus no longer
2012          * be able to find the station this way, and we don't rely
2013          * on further RCU synchronisation after the sta_state()
2014          * callback deleted the station.
2015          */
2016         mutex_lock(&mvm->mutex);
2017         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2018                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2019                                    ERR_PTR(-ENOENT));
2020         mutex_unlock(&mvm->mutex);
2021 }
2022
2023 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2024                                  struct ieee80211_vif *vif,
2025                                  struct ieee80211_sta *sta,
2026                                  enum ieee80211_sta_state old_state,
2027                                  enum ieee80211_sta_state new_state)
2028 {
2029         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2030         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2031         int ret;
2032
2033         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2034                            sta->addr, old_state, new_state);
2035
2036         /* this would be a mac80211 bug ... but don't crash */
2037         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2038                 return -EINVAL;
2039
2040         /* if a STA is being removed, reuse its ID */
2041         flush_work(&mvm->sta_drained_wk);
2042
2043         mutex_lock(&mvm->mutex);
2044         if (old_state == IEEE80211_STA_NOTEXIST &&
2045             new_state == IEEE80211_STA_NONE) {
2046                 /*
2047                  * Firmware bug - it'll crash if the beacon interval is less
2048                  * than 16. We can't avoid connecting at all, so refuse the
2049                  * station state change, this will cause mac80211 to abandon
2050                  * attempts to connect to this AP, and eventually wpa_s will
2051                  * blacklist the AP...
2052                  */
2053                 if (vif->type == NL80211_IFTYPE_STATION &&
2054                     vif->bss_conf.beacon_int < 16) {
2055                         IWL_ERR(mvm,
2056                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2057                                 sta->addr, vif->bss_conf.beacon_int);
2058                         ret = -EINVAL;
2059                         goto out_unlock;
2060                 }
2061
2062                 if (sta->tdls &&
2063                     (vif->p2p ||
2064                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2065                                                 IWL_MVM_TDLS_STA_COUNT ||
2066                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2067                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2068                         ret = -EBUSY;
2069                         goto out_unlock;
2070                 }
2071
2072                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2073                 if (sta->tdls && ret == 0)
2074                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2075         } else if (old_state == IEEE80211_STA_NONE &&
2076                    new_state == IEEE80211_STA_AUTH) {
2077                 /*
2078                  * EBS may be disabled due to previous failures reported by FW.
2079                  * Reset EBS status here assuming environment has been changed.
2080                  */
2081                 mvm->last_ebs_successful = true;
2082                 ret = 0;
2083         } else if (old_state == IEEE80211_STA_AUTH &&
2084                    new_state == IEEE80211_STA_ASSOC) {
2085                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2086                 if (ret == 0)
2087                         iwl_mvm_rs_rate_init(mvm, sta,
2088                                              mvmvif->phy_ctxt->channel->band,
2089                                              true);
2090         } else if (old_state == IEEE80211_STA_ASSOC &&
2091                    new_state == IEEE80211_STA_AUTHORIZED) {
2092
2093                 /* we don't support TDLS during DCM */
2094                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2095                         iwl_mvm_teardown_tdls_peers(mvm);
2096
2097                 /* enable beacon filtering */
2098                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2099                 ret = 0;
2100         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2101                    new_state == IEEE80211_STA_ASSOC) {
2102                 /* disable beacon filtering */
2103                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2104                 ret = 0;
2105         } else if (old_state == IEEE80211_STA_ASSOC &&
2106                    new_state == IEEE80211_STA_AUTH) {
2107                 ret = 0;
2108         } else if (old_state == IEEE80211_STA_AUTH &&
2109                    new_state == IEEE80211_STA_NONE) {
2110                 ret = 0;
2111         } else if (old_state == IEEE80211_STA_NONE &&
2112                    new_state == IEEE80211_STA_NOTEXIST) {
2113                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2114                 if (sta->tdls)
2115                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2116         } else {
2117                 ret = -EIO;
2118         }
2119  out_unlock:
2120         mutex_unlock(&mvm->mutex);
2121
2122         return ret;
2123 }
2124
2125 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2126 {
2127         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2128
2129         mvm->rts_threshold = value;
2130
2131         return 0;
2132 }
2133
2134 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2135                                   struct ieee80211_vif *vif,
2136                                   struct ieee80211_sta *sta, u32 changed)
2137 {
2138         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2139
2140         if (vif->type == NL80211_IFTYPE_STATION &&
2141             changed & IEEE80211_RC_NSS_CHANGED)
2142                 iwl_mvm_sf_update(mvm, vif, false);
2143 }
2144
2145 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2146                                struct ieee80211_vif *vif, u16 ac,
2147                                const struct ieee80211_tx_queue_params *params)
2148 {
2149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2150         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2151
2152         mvmvif->queue_params[ac] = *params;
2153
2154         /*
2155          * No need to update right away, we'll get BSS_CHANGED_QOS
2156          * The exception is P2P_DEVICE interface which needs immediate update.
2157          */
2158         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2159                 int ret;
2160
2161                 mutex_lock(&mvm->mutex);
2162                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2163                 mutex_unlock(&mvm->mutex);
2164                 return ret;
2165         }
2166         return 0;
2167 }
2168
2169 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2170                                       struct ieee80211_vif *vif)
2171 {
2172         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2173         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2174                            200 + vif->bss_conf.beacon_int);
2175         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2176                                100 + vif->bss_conf.beacon_int);
2177
2178         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2179                 return;
2180
2181         /*
2182          * iwl_mvm_protect_session() reads directly from the device
2183          * (the system time), so make sure it is available.
2184          */
2185         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2186                 return;
2187
2188         mutex_lock(&mvm->mutex);
2189         /* Try really hard to protect the session and hear a beacon */
2190         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2191         mutex_unlock(&mvm->mutex);
2192
2193         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2194 }
2195
2196 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2197                                         struct ieee80211_vif *vif,
2198                                         struct cfg80211_sched_scan_request *req,
2199                                         struct ieee80211_scan_ies *ies)
2200 {
2201         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2202         int ret;
2203
2204         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2205         if (ret)
2206                 return ret;
2207
2208         mutex_lock(&mvm->mutex);
2209
2210         /* Newest FW fixes sched scan while connected on another interface */
2211         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2212                 if (!vif->bss_conf.idle) {
2213                         ret = -EBUSY;
2214                         goto out;
2215                 }
2216         } else if (!iwl_mvm_is_idle(mvm)) {
2217                 ret = -EBUSY;
2218                 goto out;
2219         }
2220
2221         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2222                 ret = -EBUSY;
2223                 goto out;
2224         }
2225
2226         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2227
2228         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2229         if (ret)
2230                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2231 out:
2232         mutex_unlock(&mvm->mutex);
2233         return ret;
2234 }
2235
2236 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2237                                        struct ieee80211_vif *vif)
2238 {
2239         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2240         int ret;
2241
2242         mutex_lock(&mvm->mutex);
2243         ret = iwl_mvm_scan_offload_stop(mvm, false);
2244         mutex_unlock(&mvm->mutex);
2245         iwl_mvm_wait_for_async_handlers(mvm);
2246
2247         return ret;
2248 }
2249
2250 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2251                                enum set_key_cmd cmd,
2252                                struct ieee80211_vif *vif,
2253                                struct ieee80211_sta *sta,
2254                                struct ieee80211_key_conf *key)
2255 {
2256         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2257         int ret;
2258
2259         if (iwlwifi_mod_params.sw_crypto) {
2260                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2261                 return -EOPNOTSUPP;
2262         }
2263
2264         switch (key->cipher) {
2265         case WLAN_CIPHER_SUITE_TKIP:
2266                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2267                 /* fall-through */
2268         case WLAN_CIPHER_SUITE_CCMP:
2269                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2270                 break;
2271         case WLAN_CIPHER_SUITE_AES_CMAC:
2272                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2273                 break;
2274         case WLAN_CIPHER_SUITE_WEP40:
2275         case WLAN_CIPHER_SUITE_WEP104:
2276                 /*
2277                  * Support for TX only, at least for now, so accept
2278                  * the key and do nothing else. Then mac80211 will
2279                  * pass it for TX but we don't have to use it for RX.
2280                  */
2281                 return 0;
2282         default:
2283                 /* currently FW supports only one optional cipher scheme */
2284                 if (hw->n_cipher_schemes &&
2285                     hw->cipher_schemes->cipher == key->cipher)
2286                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2287                 else
2288                         return -EOPNOTSUPP;
2289         }
2290
2291         mutex_lock(&mvm->mutex);
2292
2293         switch (cmd) {
2294         case SET_KEY:
2295                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2296                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2297                         /*
2298                          * GTK on AP interface is a TX-only key, return 0;
2299                          * on IBSS they're per-station and because we're lazy
2300                          * we don't support them for RX, so do the same.
2301                          */
2302                         ret = 0;
2303                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2304                         break;
2305                 }
2306
2307                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2308                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2309                 if (ret) {
2310                         IWL_WARN(mvm, "set key failed\n");
2311                         /*
2312                          * can't add key for RX, but we don't need it
2313                          * in the device for TX so still return 0
2314                          */
2315                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2316                         ret = 0;
2317                 }
2318
2319                 break;
2320         case DISABLE_KEY:
2321                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2322                         ret = 0;
2323                         break;
2324                 }
2325
2326                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2327                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2328                 break;
2329         default:
2330                 ret = -EINVAL;
2331         }
2332
2333         mutex_unlock(&mvm->mutex);
2334         return ret;
2335 }
2336
2337 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2338                                         struct ieee80211_vif *vif,
2339                                         struct ieee80211_key_conf *keyconf,
2340                                         struct ieee80211_sta *sta,
2341                                         u32 iv32, u16 *phase1key)
2342 {
2343         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2344
2345         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2346                 return;
2347
2348         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2349 }
2350
2351
2352 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2353                                struct iwl_rx_packet *pkt, void *data)
2354 {
2355         struct iwl_mvm *mvm =
2356                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2357         struct iwl_hs20_roc_res *resp;
2358         int resp_len = iwl_rx_packet_payload_len(pkt);
2359         struct iwl_mvm_time_event_data *te_data = data;
2360
2361         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2362                 return true;
2363
2364         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2365                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2366                 return true;
2367         }
2368
2369         resp = (void *)pkt->data;
2370
2371         IWL_DEBUG_TE(mvm,
2372                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2373                      resp->status, resp->event_unique_id);
2374
2375         te_data->uid = le32_to_cpu(resp->event_unique_id);
2376         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2377                      te_data->uid);
2378
2379         spin_lock_bh(&mvm->time_event_lock);
2380         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2381         spin_unlock_bh(&mvm->time_event_lock);
2382
2383         return true;
2384 }
2385
2386 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2387 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2388                                     struct ieee80211_channel *channel,
2389                                     struct ieee80211_vif *vif,
2390                                     int duration)
2391 {
2392         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2393         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2394         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2395         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2396         struct iwl_notification_wait wait_time_event;
2397         struct iwl_hs20_roc_req aux_roc_req = {
2398                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2399                 .id_and_color =
2400                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2401                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2402                 /* Set the channel info data */
2403                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2404                         PHY_BAND_24 : PHY_BAND_5,
2405                 .channel_info.channel = channel->hw_value,
2406                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2407                 /* Set the time and duration */
2408                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2409                 .apply_time_max_delay =
2410                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2411                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2412          };
2413
2414         /* Set the node address */
2415         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2416
2417         lockdep_assert_held(&mvm->mutex);
2418
2419         spin_lock_bh(&mvm->time_event_lock);
2420
2421         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2422                 spin_unlock_bh(&mvm->time_event_lock);
2423                 return -EIO;
2424         }
2425
2426         te_data->vif = vif;
2427         te_data->duration = duration;
2428         te_data->id = HOT_SPOT_CMD;
2429
2430         spin_unlock_bh(&mvm->time_event_lock);
2431
2432         /*
2433          * Use a notification wait, which really just processes the
2434          * command response and doesn't wait for anything, in order
2435          * to be able to process the response and get the UID inside
2436          * the RX path. Using CMD_WANT_SKB doesn't work because it
2437          * stores the buffer and then wakes up this thread, by which
2438          * time another notification (that the time event started)
2439          * might already be processed unsuccessfully.
2440          */
2441         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2442                                    time_event_response,
2443                                    ARRAY_SIZE(time_event_response),
2444                                    iwl_mvm_rx_aux_roc, te_data);
2445
2446         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2447                                    &aux_roc_req);
2448
2449         if (res) {
2450                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2451                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2452                 goto out_clear_te;
2453         }
2454
2455         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2456         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2457         /* should never fail */
2458         WARN_ON_ONCE(res);
2459
2460         if (res) {
2461  out_clear_te:
2462                 spin_lock_bh(&mvm->time_event_lock);
2463                 iwl_mvm_te_clear_data(mvm, te_data);
2464                 spin_unlock_bh(&mvm->time_event_lock);
2465         }
2466
2467         return res;
2468 }
2469
2470 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2471                        struct ieee80211_vif *vif,
2472                        struct ieee80211_channel *channel,
2473                        int duration,
2474                        enum ieee80211_roc_type type)
2475 {
2476         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2477         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2478         struct cfg80211_chan_def chandef;
2479         struct iwl_mvm_phy_ctxt *phy_ctxt;
2480         int ret, i;
2481
2482         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2483                            duration, type);
2484
2485         mutex_lock(&mvm->mutex);
2486
2487         switch (vif->type) {
2488         case NL80211_IFTYPE_STATION:
2489                 /* Use aux roc framework (HS20) */
2490                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2491                                                vif, duration);
2492                 goto out_unlock;
2493         case NL80211_IFTYPE_P2P_DEVICE:
2494                 /* handle below */
2495                 break;
2496         default:
2497                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2498                 ret = -EINVAL;
2499                 goto out_unlock;
2500         }
2501
2502         for (i = 0; i < NUM_PHY_CTX; i++) {
2503                 phy_ctxt = &mvm->phy_ctxts[i];
2504                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2505                         continue;
2506
2507                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2508                         /*
2509                          * Unbind the P2P_DEVICE from the current PHY context,
2510                          * and if the PHY context is not used remove it.
2511                          */
2512                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2513                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2514                                 goto out_unlock;
2515
2516                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2517
2518                         /* Bind the P2P_DEVICE to the current PHY Context */
2519                         mvmvif->phy_ctxt = phy_ctxt;
2520
2521                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2522                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2523                                 goto out_unlock;
2524
2525                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2526                         goto schedule_time_event;
2527                 }
2528         }
2529
2530         /* Need to update the PHY context only if the ROC channel changed */
2531         if (channel == mvmvif->phy_ctxt->channel)
2532                 goto schedule_time_event;
2533
2534         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2535
2536         /*
2537          * Change the PHY context configuration as it is currently referenced
2538          * only by the P2P Device MAC
2539          */
2540         if (mvmvif->phy_ctxt->ref == 1) {
2541                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2542                                                &chandef, 1, 1);
2543                 if (ret)
2544                         goto out_unlock;
2545         } else {
2546                 /*
2547                  * The PHY context is shared with other MACs. Need to remove the
2548                  * P2P Device from the binding, allocate an new PHY context and
2549                  * create a new binding
2550                  */
2551                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2552                 if (!phy_ctxt) {
2553                         ret = -ENOSPC;
2554                         goto out_unlock;
2555                 }
2556
2557                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2558                                                1, 1);
2559                 if (ret) {
2560                         IWL_ERR(mvm, "Failed to change PHY context\n");
2561                         goto out_unlock;
2562                 }
2563
2564                 /* Unbind the P2P_DEVICE from the current PHY context */
2565                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2566                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2567                         goto out_unlock;
2568
2569                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2570
2571                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2572                 mvmvif->phy_ctxt = phy_ctxt;
2573
2574                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2575                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2576                         goto out_unlock;
2577
2578                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2579         }
2580
2581 schedule_time_event:
2582         /* Schedule the time events */
2583         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2584
2585 out_unlock:
2586         mutex_unlock(&mvm->mutex);
2587         IWL_DEBUG_MAC80211(mvm, "leave\n");
2588         return ret;
2589 }
2590
2591 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2592 {
2593         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2594
2595         IWL_DEBUG_MAC80211(mvm, "enter\n");
2596
2597         mutex_lock(&mvm->mutex);
2598         iwl_mvm_stop_p2p_roc(mvm);
2599         mutex_unlock(&mvm->mutex);
2600
2601         IWL_DEBUG_MAC80211(mvm, "leave\n");
2602         return 0;
2603 }
2604
2605 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2606                                  struct ieee80211_chanctx_conf *ctx)
2607 {
2608         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2609         struct iwl_mvm_phy_ctxt *phy_ctxt;
2610         int ret;
2611
2612         lockdep_assert_held(&mvm->mutex);
2613
2614         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2615
2616         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2617         if (!phy_ctxt) {
2618                 ret = -ENOSPC;
2619                 goto out;
2620         }
2621
2622         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2623                                        ctx->rx_chains_static,
2624                                        ctx->rx_chains_dynamic);
2625         if (ret) {
2626                 IWL_ERR(mvm, "Failed to add PHY context\n");
2627                 goto out;
2628         }
2629
2630         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2631         *phy_ctxt_id = phy_ctxt->id;
2632 out:
2633         return ret;
2634 }
2635
2636 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2637                                struct ieee80211_chanctx_conf *ctx)
2638 {
2639         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2640         int ret;
2641
2642         mutex_lock(&mvm->mutex);
2643         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2644         mutex_unlock(&mvm->mutex);
2645
2646         return ret;
2647 }
2648
2649 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2650                                      struct ieee80211_chanctx_conf *ctx)
2651 {
2652         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2653         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2654
2655         lockdep_assert_held(&mvm->mutex);
2656
2657         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2658 }
2659
2660 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2661                                    struct ieee80211_chanctx_conf *ctx)
2662 {
2663         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2664
2665         mutex_lock(&mvm->mutex);
2666         __iwl_mvm_remove_chanctx(mvm, ctx);
2667         mutex_unlock(&mvm->mutex);
2668 }
2669
2670 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2671                                    struct ieee80211_chanctx_conf *ctx,
2672                                    u32 changed)
2673 {
2674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2675         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2676         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2677
2678         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2679                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2680                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2681                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2682                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2683                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2684                       phy_ctxt->ref, changed))
2685                 return;
2686
2687         mutex_lock(&mvm->mutex);
2688         iwl_mvm_bt_coex_vif_change(mvm);
2689         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2690                                  ctx->rx_chains_static,
2691                                  ctx->rx_chains_dynamic);
2692         mutex_unlock(&mvm->mutex);
2693 }
2694
2695 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2696                                         struct ieee80211_vif *vif,
2697                                         struct ieee80211_chanctx_conf *ctx,
2698                                         bool switching_chanctx)
2699 {
2700         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2701         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2702         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2703         int ret;
2704
2705         lockdep_assert_held(&mvm->mutex);
2706
2707         mvmvif->phy_ctxt = phy_ctxt;
2708
2709         switch (vif->type) {
2710         case NL80211_IFTYPE_AP:
2711                 /* Unless it's a CSA flow we have nothing to do here */
2712                 if (vif->csa_active) {
2713                         mvmvif->ap_ibss_active = true;
2714                         break;
2715                 }
2716         case NL80211_IFTYPE_ADHOC:
2717                 /*
2718                  * The AP binding flow is handled as part of the start_ap flow
2719                  * (in bss_info_changed), similarly for IBSS.
2720                  */
2721                 ret = 0;
2722                 goto out;
2723         case NL80211_IFTYPE_STATION:
2724                 break;
2725         case NL80211_IFTYPE_MONITOR:
2726                 /* always disable PS when a monitor interface is active */
2727                 mvmvif->ps_disabled = true;
2728                 break;
2729         default:
2730                 ret = -EINVAL;
2731                 goto out;
2732         }
2733
2734         ret = iwl_mvm_binding_add_vif(mvm, vif);
2735         if (ret)
2736                 goto out;
2737
2738         /*
2739          * Power state must be updated before quotas,
2740          * otherwise fw will complain.
2741          */
2742         iwl_mvm_power_update_mac(mvm);
2743
2744         /* Setting the quota at this stage is only required for monitor
2745          * interfaces. For the other types, the bss_info changed flow
2746          * will handle quota settings.
2747          */
2748         if (vif->type == NL80211_IFTYPE_MONITOR) {
2749                 mvmvif->monitor_active = true;
2750                 ret = iwl_mvm_update_quotas(mvm, NULL);
2751                 if (ret)
2752                         goto out_remove_binding;
2753         }
2754
2755         /* Handle binding during CSA */
2756         if ((vif->type == NL80211_IFTYPE_AP) ||
2757             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2758                 iwl_mvm_update_quotas(mvm, NULL);
2759                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2760         }
2761
2762         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2763                 struct iwl_mvm_sta *mvmsta;
2764
2765                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2766                                                           mvmvif->ap_sta_id);
2767
2768                 if (WARN_ON(!mvmsta))
2769                         goto out;
2770
2771                 /* TODO: only re-enable after the first beacon */
2772                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2773         }
2774
2775         goto out;
2776
2777 out_remove_binding:
2778         iwl_mvm_binding_remove_vif(mvm, vif);
2779         iwl_mvm_power_update_mac(mvm);
2780 out:
2781         if (ret)
2782                 mvmvif->phy_ctxt = NULL;
2783         return ret;
2784 }
2785 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2786                                       struct ieee80211_vif *vif,
2787                                       struct ieee80211_chanctx_conf *ctx)
2788 {
2789         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2790         int ret;
2791
2792         mutex_lock(&mvm->mutex);
2793         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2794         mutex_unlock(&mvm->mutex);
2795
2796         return ret;
2797 }
2798
2799 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2800                                            struct ieee80211_vif *vif,
2801                                            struct ieee80211_chanctx_conf *ctx,
2802                                            bool switching_chanctx)
2803 {
2804         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2805         struct ieee80211_vif *disabled_vif = NULL;
2806         struct iwl_mvm_sta *mvmsta;
2807
2808         lockdep_assert_held(&mvm->mutex);
2809
2810         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2811
2812         switch (vif->type) {
2813         case NL80211_IFTYPE_ADHOC:
2814                 goto out;
2815         case NL80211_IFTYPE_MONITOR:
2816                 mvmvif->monitor_active = false;
2817                 mvmvif->ps_disabled = false;
2818                 break;
2819         case NL80211_IFTYPE_AP:
2820                 /* This part is triggered only during CSA */
2821                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2822                         goto out;
2823
2824                 /* Set CS bit on all the stations */
2825                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2826
2827                 /* Save blocked iface, the timeout is set on the next beacon */
2828                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2829
2830                 mvmvif->ap_ibss_active = false;
2831                 break;
2832         case NL80211_IFTYPE_STATION:
2833                 if (!switching_chanctx)
2834                         break;
2835
2836                 disabled_vif = vif;
2837
2838                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2839                                                           mvmvif->ap_sta_id);
2840
2841                 if (!WARN_ON(!mvmsta))
2842                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2843
2844                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2845                 break;
2846         default:
2847                 break;
2848         }
2849
2850         iwl_mvm_update_quotas(mvm, disabled_vif);
2851         iwl_mvm_binding_remove_vif(mvm, vif);
2852
2853 out:
2854         mvmvif->phy_ctxt = NULL;
2855         iwl_mvm_power_update_mac(mvm);
2856 }
2857
2858 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2859                                          struct ieee80211_vif *vif,
2860                                          struct ieee80211_chanctx_conf *ctx)
2861 {
2862         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2863
2864         mutex_lock(&mvm->mutex);
2865         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2866         mutex_unlock(&mvm->mutex);
2867 }
2868
2869 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2870                                       struct ieee80211_vif_chanctx_switch *vifs,
2871                                       int n_vifs,
2872                                       enum ieee80211_chanctx_switch_mode mode)
2873 {
2874         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2875         int ret;
2876
2877         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2878         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2879                 return -EOPNOTSUPP;
2880
2881         mutex_lock(&mvm->mutex);
2882         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2883         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2884
2885         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2886         if (ret) {
2887                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2888                 goto out_reassign;
2889         }
2890
2891         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2892                                            true);
2893         if (ret) {
2894                 IWL_ERR(mvm,
2895                         "failed to assign new_ctx during channel switch\n");
2896                 goto out_remove;
2897         }
2898
2899         /* we don't support TDLS during DCM - can be caused by channel switch */
2900         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2901                 iwl_mvm_teardown_tdls_peers(mvm);
2902
2903         goto out;
2904
2905 out_remove:
2906         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2907
2908 out_reassign:
2909         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2910         if (ret) {
2911                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2912                 goto out_restart;
2913         }
2914
2915         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2916                                            true);
2917         if (ret) {
2918                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2919                 goto out_restart;
2920         }
2921
2922         goto out;
2923
2924 out_restart:
2925         /* things keep failing, better restart the hw */
2926         iwl_mvm_nic_restart(mvm, false);
2927
2928 out:
2929         mutex_unlock(&mvm->mutex);
2930         return ret;
2931 }
2932
2933 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2934                            struct ieee80211_sta *sta,
2935                            bool set)
2936 {
2937         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2938         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2939
2940         if (!mvm_sta || !mvm_sta->vif) {
2941                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2942                 return -EINVAL;
2943         }
2944
2945         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2946 }
2947
2948 #ifdef CONFIG_NL80211_TESTMODE
2949 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2950         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2951         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2952         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2953 };
2954
2955 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2956                                       struct ieee80211_vif *vif,
2957                                       void *data, int len)
2958 {
2959         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2960         int err;
2961         u32 noa_duration;
2962
2963         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2964         if (err)
2965                 return err;
2966
2967         if (!tb[IWL_MVM_TM_ATTR_CMD])
2968                 return -EINVAL;
2969
2970         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2971         case IWL_MVM_TM_CMD_SET_NOA:
2972                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2973                     !vif->bss_conf.enable_beacon ||
2974                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2975                         return -EINVAL;
2976
2977                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2978                 if (noa_duration >= vif->bss_conf.beacon_int)
2979                         return -EINVAL;
2980
2981                 mvm->noa_duration = noa_duration;
2982                 mvm->noa_vif = vif;
2983
2984                 return iwl_mvm_update_quotas(mvm, NULL);
2985         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2986                 /* must be associated client vif - ignore authorized */
2987                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2988                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2989                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2990                         return -EINVAL;
2991
2992                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2993                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2994                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2995         }
2996
2997         return -EOPNOTSUPP;
2998 }
2999
3000 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3001                                     struct ieee80211_vif *vif,
3002                                     void *data, int len)
3003 {
3004         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3005         int err;
3006
3007         mutex_lock(&mvm->mutex);
3008         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3009         mutex_unlock(&mvm->mutex);
3010
3011         return err;
3012 }
3013 #endif
3014
3015 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3016                                           struct ieee80211_vif *vif,
3017                                           struct cfg80211_chan_def *chandef)
3018 {
3019         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3020         struct ieee80211_vif *csa_vif;
3021
3022         mutex_lock(&mvm->mutex);
3023
3024         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3025                                             lockdep_is_held(&mvm->mutex));
3026         if (WARN(csa_vif && csa_vif->csa_active,
3027                  "Another CSA is already in progress"))
3028                 goto out_unlock;
3029
3030         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3031                            chandef->center_freq1);
3032         rcu_assign_pointer(mvm->csa_vif, vif);
3033
3034 out_unlock:
3035         mutex_unlock(&mvm->mutex);
3036 }
3037
3038 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3039                               struct ieee80211_vif *vif, u32 queues, bool drop)
3040 {
3041         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3042         struct iwl_mvm_vif *mvmvif;
3043         struct iwl_mvm_sta *mvmsta;
3044
3045         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3046                 return;
3047
3048         mutex_lock(&mvm->mutex);
3049         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3050         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3051
3052         if (WARN_ON_ONCE(!mvmsta)) {
3053                 mutex_unlock(&mvm->mutex);
3054                 return;
3055         }
3056
3057         if (drop) {
3058                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3059                         IWL_ERR(mvm, "flush request fail\n");
3060                 mutex_unlock(&mvm->mutex);
3061         } else {
3062                 u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
3063                 mutex_unlock(&mvm->mutex);
3064
3065                 /* this can take a while, and we may need/want other operations
3066                  * to succeed while doing this, so do it without the mutex held
3067                  */
3068                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
3069         }
3070 }
3071
3072 const struct ieee80211_ops iwl_mvm_hw_ops = {
3073         .tx = iwl_mvm_mac_tx,
3074         .ampdu_action = iwl_mvm_mac_ampdu_action,
3075         .start = iwl_mvm_mac_start,
3076         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3077         .stop = iwl_mvm_mac_stop,
3078         .add_interface = iwl_mvm_mac_add_interface,
3079         .remove_interface = iwl_mvm_mac_remove_interface,
3080         .config = iwl_mvm_mac_config,
3081         .prepare_multicast = iwl_mvm_prepare_multicast,
3082         .configure_filter = iwl_mvm_configure_filter,
3083         .bss_info_changed = iwl_mvm_bss_info_changed,
3084         .hw_scan = iwl_mvm_mac_hw_scan,
3085         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3086         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3087         .sta_state = iwl_mvm_mac_sta_state,
3088         .sta_notify = iwl_mvm_mac_sta_notify,
3089         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3090         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3091         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3092         .sta_rc_update = iwl_mvm_sta_rc_update,
3093         .conf_tx = iwl_mvm_mac_conf_tx,
3094         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3095         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3096         .flush = iwl_mvm_mac_flush,
3097         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3098         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3099         .set_key = iwl_mvm_mac_set_key,
3100         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3101         .remain_on_channel = iwl_mvm_roc,
3102         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3103         .add_chanctx = iwl_mvm_add_chanctx,
3104         .remove_chanctx = iwl_mvm_remove_chanctx,
3105         .change_chanctx = iwl_mvm_change_chanctx,
3106         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3107         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3108         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3109
3110         .start_ap = iwl_mvm_start_ap_ibss,
3111         .stop_ap = iwl_mvm_stop_ap_ibss,
3112         .join_ibss = iwl_mvm_start_ap_ibss,
3113         .leave_ibss = iwl_mvm_stop_ap_ibss,
3114
3115         .set_tim = iwl_mvm_set_tim,
3116
3117         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3118
3119         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3120
3121 #ifdef CONFIG_PM_SLEEP
3122         /* look at d3.c */
3123         .suspend = iwl_mvm_suspend,
3124         .resume = iwl_mvm_resume,
3125         .set_wakeup = iwl_mvm_set_wakeup,
3126         .set_rekey_data = iwl_mvm_set_rekey_data,
3127 #if IS_ENABLED(CONFIG_IPV6)
3128         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3129 #endif
3130         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3131 #endif
3132 };