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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
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  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "fw-api-scan.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 258 {
 259         int i;
 260         bool taken = false;
 261
 262         if (!iwl_mvm_is_d0i3_supported(mvm))
 263                 return true;
 264
 265         spin_lock_bh(&mvm->refs_lock);
 266         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 267                 if (mvm->refs[i]) {
 268                         taken = true;
 269                         break;
 270                 }
 271         }
 272         spin_unlock_bh(&mvm->refs_lock);
 273
 274         return taken;
 275 }
 276
 277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 278 {
 279         iwl_mvm_ref(mvm, ref_type);
 280
 281         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 282                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 283                                 HZ)) {
 284                 WARN_ON_ONCE(1);
 285                 iwl_mvm_unref(mvm, ref_type);
 286                 return -EIO;
 287         }
 288
 289         return 0;
 290 }
 291
 292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 293 {
 294         int i;
 295
 296         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 297         for (i = 0; i < NUM_PHY_CTX; i++) {
 298                 mvm->phy_ctxts[i].id = i;
 299                 mvm->phy_ctxts[i].ref = 0;
 300         }
 301 }
 302
 303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 304 {
 305         struct ieee80211_hw *hw = mvm->hw;
 306         int num_mac, ret, i;
 307
 308         /* Tell mac80211 our characteristics */
 309         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 310                     IEEE80211_HW_SPECTRUM_MGMT |
 311                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 312                     IEEE80211_HW_QUEUE_CONTROL |
 313                     IEEE80211_HW_WANT_MONITOR_VIF |
 314                     IEEE80211_HW_SUPPORTS_PS |
 315                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 316                     IEEE80211_HW_AMPDU_AGGREGATION |
 317                     IEEE80211_HW_TIMING_BEACON_ONLY |
 318                     IEEE80211_HW_CONNECTION_MONITOR |
 319                     IEEE80211_HW_CHANCTX_STA_CSA |
 320                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 321
 322         hw->queues = mvm->first_agg_queue;
 323         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 324         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 325                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 326         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 327         hw->rate_control_algorithm = "iwl-mvm-rs";
 328
 329         /*
 330          * Enable 11w if advertised by firmware and software crypto
 331          * is not enabled (as the firmware will interpret some mgmt
 332          * packets, so enabling it with software crypto isn't safe)
 333          */
 334         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 335             !iwlwifi_mod_params.sw_crypto)
 336                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 337
 338         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 339             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 340             !iwlwifi_mod_params.uapsd_disable) {
 341                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 342                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 343                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 344         }
 345
 346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 347             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
 348                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 349
 350         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 351         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 352         hw->chanctx_data_size = sizeof(u16);
 353
 354         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 355                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 356                 BIT(NL80211_IFTYPE_AP) |
 357                 BIT(NL80211_IFTYPE_P2P_GO) |
 358                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 359                 BIT(NL80211_IFTYPE_ADHOC);
 360
 361         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 362         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 363                                        REGULATORY_DISABLE_BEACON_HINTS;
 364
 365         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 366                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 367
 368         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 369                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 370
 371         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 372         hw->wiphy->n_iface_combinations =
 373                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 374
 375         hw->wiphy->max_remain_on_channel_duration = 10000;
 376         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 377
 378         /* Extract MAC address */
 379         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 380         hw->wiphy->addresses = mvm->addresses;
 381         hw->wiphy->n_addresses = 1;
 382
 383         /* Extract additional MAC addresses if available */
 384         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 385                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 386
 387         for (i = 1; i < num_mac; i++) {
 388                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 389                        ETH_ALEN);
 390                 mvm->addresses[i].addr[5]++;
 391                 hw->wiphy->n_addresses++;
 392         }
 393
 394         iwl_mvm_reset_phy_ctxts(mvm);
 395
 396         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 397
 398         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 399
 400         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 401                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 402                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 403         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 404                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 405                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 406
 407         hw->wiphy->hw_version = mvm->trans->hw_id;
 408
 409         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 410                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 411         else
 412                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 413
 414         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 415                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 416                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 417                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 418                 /* we create the 802.11 header and zero length SSID IE. */
 419                 hw->wiphy->max_sched_scan_ie_len =
 420                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 421         }
 422
 423         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 424                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 425                                NL80211_FEATURE_P2P_GO_OPPPS |
 426                                NL80211_FEATURE_DYNAMIC_SMPS |
 427                                NL80211_FEATURE_STATIC_SMPS |
 428                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 429
 430         if (mvm->fw->ucode_capa.capa[0] &
 431             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 432                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 433         if (mvm->fw->ucode_capa.capa[0] &
 434             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 435                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 436
 437         if (mvm->fw->ucode_capa.capa[0] &
 438             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 439                 hw->wiphy->features |=
 440                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 441
 442         if (mvm->fw->ucode_capa.capa[0] &
 443             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 444                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 445
 446         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 447
 448         /* currently FW API supports only one optional cipher scheme */
 449         if (mvm->fw->cs[0].cipher) {
 450                 mvm->hw->n_cipher_schemes = 1;
 451                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 452         }
 453
 454 #ifdef CONFIG_PM_SLEEP
 455         if (iwl_mvm_is_d0i3_supported(mvm) &&
 456             device_can_wakeup(mvm->trans->dev)) {
 457                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 458                 hw->wiphy->wowlan = &mvm->wowlan;
 459         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 460             mvm->trans->ops->d3_suspend &&
 461             mvm->trans->ops->d3_resume &&
 462             device_can_wakeup(mvm->trans->dev)) {
 463                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 464                                     WIPHY_WOWLAN_DISCONNECT |
 465                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 466                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 467                 if (!iwlwifi_mod_params.sw_crypto)
 468                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 469                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 470                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 471
 472                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 473                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 474                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 475                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 476                 hw->wiphy->wowlan = &mvm->wowlan;
 477         }
 478 #endif
 479
 480 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 481         /* assign default bcast filtering configuration */
 482         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 483 #endif
 484
 485         ret = iwl_mvm_leds_init(mvm);
 486         if (ret)
 487                 return ret;
 488
 489         ret = ieee80211_register_hw(mvm->hw);
 490         if (ret)
 491                 iwl_mvm_leds_exit(mvm);
 492
 493         return ret;
 494 }
 495
 496 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 497                              struct ieee80211_sta *sta,
 498                              struct sk_buff *skb)
 499 {
 500         struct iwl_mvm_sta *mvmsta;
 501         bool defer = false;
 502
 503         /*
 504          * double check the IN_D0I3 flag both before and after
 505          * taking the spinlock, in order to prevent taking
 506          * the spinlock when not needed.
 507          */
 508         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 509                 return false;
 510
 511         spin_lock(&mvm->d0i3_tx_lock);
 512         /*
 513          * testing the flag again ensures the skb dequeue
 514          * loop (on d0i3 exit) hasn't run yet.
 515          */
 516         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 517                 goto out;
 518
 519         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 520         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 521             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 522                 goto out;
 523
 524         __skb_queue_tail(&mvm->d0i3_tx, skb);
 525         ieee80211_stop_queues(mvm->hw);
 526
 527         /* trigger wakeup */
 528         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 529         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 530
 531         defer = true;
 532 out:
 533         spin_unlock(&mvm->d0i3_tx_lock);
 534         return defer;
 535 }
 536
 537 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 538                            struct ieee80211_tx_control *control,
 539                            struct sk_buff *skb)
 540 {
 541         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 542         struct ieee80211_sta *sta = control->sta;
 543         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 544         struct ieee80211_hdr *hdr = (void *)skb->data;
 545
 546         if (iwl_mvm_is_radio_killed(mvm)) {
 547                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 548                 goto drop;
 549         }
 550
 551         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 552             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 553             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 554                 goto drop;
 555
 556         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 557         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 558                      ieee80211_is_mgmt(hdr->frame_control) &&
 559                      !ieee80211_is_deauth(hdr->frame_control) &&
 560                      !ieee80211_is_disassoc(hdr->frame_control) &&
 561                      !ieee80211_is_action(hdr->frame_control)))
 562                 sta = NULL;
 563
 564         if (sta) {
 565                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 566                         return;
 567                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 568                         goto drop;
 569                 return;
 570         }
 571
 572         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 573                 goto drop;
 574         return;
 575  drop:
 576         ieee80211_free_txskb(hw, skb);
 577 }
 578
 579 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 580 {
 581         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 582                 return false;
 583         return true;
 584 }
 585
 586 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 587 {
 588         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 589                 return false;
 590         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 591                 return true;
 592
 593         /* enabled by default */
 594         return true;
 595 }
 596
 597 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 598                                     struct ieee80211_vif *vif,
 599                                     enum ieee80211_ampdu_mlme_action action,
 600                                     struct ieee80211_sta *sta, u16 tid,
 601                                     u16 *ssn, u8 buf_size)
 602 {
 603         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 604         int ret;
 605         bool tx_agg_ref = false;
 606
 607         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 608                      sta->addr, tid, action);
 609
 610         if (!(mvm->nvm_data->sku_cap_11n_enable))
 611                 return -EACCES;
 612
 613         /* return from D0i3 before starting a new Tx aggregation */
 614         switch (action) {
 615         case IEEE80211_AMPDU_TX_START:
 616         case IEEE80211_AMPDU_TX_STOP_CONT:
 617         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 618         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 619         case IEEE80211_AMPDU_TX_OPERATIONAL:
 620                 /*
 621                  * for tx start, wait synchronously until D0i3 exit to
 622                  * get the correct sequence number for the tid.
 623                  * additionally, some other ampdu actions use direct
 624                  * target access, which is not handled automatically
 625                  * by the trans layer (unlike commands), so wait for
 626                  * d0i3 exit in these cases as well.
 627                  */
 628                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 629                 if (ret)
 630                         return ret;
 631
 632                 tx_agg_ref = true;
 633                 break;
 634         default:
 635                 break;
 636         }
 637
 638         mutex_lock(&mvm->mutex);
 639
 640         switch (action) {
 641         case IEEE80211_AMPDU_RX_START:
 642                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 643                         ret = -EINVAL;
 644                         break;
 645                 }
 646                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 647                 break;
 648         case IEEE80211_AMPDU_RX_STOP:
 649                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 650                 break;
 651         case IEEE80211_AMPDU_TX_START:
 652                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 653                         ret = -EINVAL;
 654                         break;
 655                 }
 656                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 657                 break;
 658         case IEEE80211_AMPDU_TX_STOP_CONT:
 659                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 660                 break;
 661         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 662         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 663                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 664                 break;
 665         case IEEE80211_AMPDU_TX_OPERATIONAL:
 666                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 667                 break;
 668         default:
 669                 WARN_ON_ONCE(1);
 670                 ret = -EINVAL;
 671                 break;
 672         }
 673         mutex_unlock(&mvm->mutex);
 674
 675         /*
 676          * If the tid is marked as started, we won't use it for offloaded
 677          * traffic on the next D0i3 entry. It's safe to unref.
 678          */
 679         if (tx_agg_ref)
 680                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 681
 682         return ret;
 683 }
 684
 685 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 686                                      struct ieee80211_vif *vif)
 687 {
 688         struct iwl_mvm *mvm = data;
 689         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 690
 691         mvmvif->uploaded = false;
 692         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 693
 694         /* does this make sense at all? */
 695         mvmvif->color++;
 696
 697         spin_lock_bh(&mvm->time_event_lock);
 698         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 699         spin_unlock_bh(&mvm->time_event_lock);
 700
 701         mvmvif->phy_ctxt = NULL;
 702         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 703 }
 704
 705 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 706                                      const void *data, size_t datalen)
 707 {
 708         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 709         ssize_t bytes_read;
 710         ssize_t bytes_read_trans;
 711
 712         if (offset < dump_ptrs->op_mode_len) {
 713                 bytes_read = min_t(ssize_t, count,
 714                                    dump_ptrs->op_mode_len - offset);
 715                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 716                        bytes_read);
 717                 offset += bytes_read;
 718                 count -= bytes_read;
 719
 720                 if (count == 0)
 721                         return bytes_read;
 722         } else {
 723                 bytes_read = 0;
 724         }
 725
 726         if (!dump_ptrs->trans_ptr)
 727                 return bytes_read;
 728
 729         offset -= dump_ptrs->op_mode_len;
 730         bytes_read_trans = min_t(ssize_t, count,
 731                                  dump_ptrs->trans_ptr->len - offset);
 732         memcpy(buffer + bytes_read,
 733                (u8 *)dump_ptrs->trans_ptr->data + offset,
 734                bytes_read_trans);
 735
 736         return bytes_read + bytes_read_trans;
 737 }
 738
 739 static void iwl_mvm_free_coredump(const void *data)
 740 {
 741         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 742
 743         vfree(fw_error_dump->op_mode_ptr);
 744         vfree(fw_error_dump->trans_ptr);
 745         kfree(fw_error_dump);
 746 }
 747
 748 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 749 {
 750         struct iwl_fw_error_dump_file *dump_file;
 751         struct iwl_fw_error_dump_data *dump_data;
 752         struct iwl_fw_error_dump_info *dump_info;
 753         struct iwl_mvm_dump_ptrs *fw_error_dump;
 754         const struct fw_img *img;
 755         u32 sram_len, sram_ofs;
 756         u32 file_len, rxf_len;
 757         unsigned long flags;
 758         int reg_val;
 759
 760         lockdep_assert_held(&mvm->mutex);
 761
 762         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 763         if (!fw_error_dump)
 764                 return;
 765
 766         img = &mvm->fw->img[mvm->cur_ucode];
 767         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 768         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 769
 770         /* reading buffer size */
 771         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 772         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 773
 774         /* the register holds the value divided by 128 */
 775         rxf_len = rxf_len << 7;
 776
 777         file_len = sizeof(*dump_file) +
 778                    sizeof(*dump_data) * 3 +
 779                    sram_len +
 780                    rxf_len +
 781                    sizeof(*dump_info);
 782
 783         dump_file = vzalloc(file_len);
 784         if (!dump_file) {
 785                 kfree(fw_error_dump);
 786                 return;
 787         }
 788
 789         fw_error_dump->op_mode_ptr = dump_file;
 790
 791         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 792         dump_data = (void *)dump_file->data;
 793
 794         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 795         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 796         dump_info = (void *) dump_data->data;
 797         dump_info->device_family =
 798                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 799                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 800                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 801         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 802                sizeof(dump_info->fw_human_readable));
 803         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 804                 sizeof(dump_info->dev_human_readable));
 805         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 806                 sizeof(dump_info->bus_human_readable));
 807
 808         dump_data = iwl_fw_error_next_data(dump_data);
 809         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 810         dump_data->len = cpu_to_le32(rxf_len);
 811
 812         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 813                 u32 *rxf = (void *)dump_data->data;
 814                 int i;
 815
 816                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 817                         iwl_trans_write_prph(mvm->trans,
 818                                              RXF_LD_FENCE_OFFSET_ADDR,
 819                                              i * sizeof(u32));
 820                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 821                                                      RXF_FIFO_RD_FENCE_ADDR);
 822                 }
 823                 iwl_trans_release_nic_access(mvm->trans, &flags);
 824         }
 825
 826         dump_data = iwl_fw_error_next_data(dump_data);
 827         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 828         dump_data->len = cpu_to_le32(sram_len);
 829         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 830                                  sram_len);
 831
 832         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 833         fw_error_dump->op_mode_len = file_len;
 834         if (fw_error_dump->trans_ptr)
 835                 file_len += fw_error_dump->trans_ptr->len;
 836         dump_file->file_len = cpu_to_le32(file_len);
 837
 838         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 839                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 840 }
 841
 842 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 843 {
 844         /* clear the D3 reconfig, we only need it to avoid dumping a
 845          * firmware coredump on reconfiguration, we shouldn't do that
 846          * on D3->D0 transition
 847          */
 848         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
 849                 iwl_mvm_fw_error_dump(mvm);
 850
 851         iwl_trans_stop_device(mvm->trans);
 852
 853         mvm->scan_status = IWL_MVM_SCAN_NONE;
 854         mvm->ps_disabled = false;
 855         mvm->calibrating = false;
 856
 857         /* just in case one was running */
 858         ieee80211_remain_on_channel_expired(mvm->hw);
 859
 860         ieee80211_iterate_active_interfaces_atomic(
 861                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 862                 iwl_mvm_cleanup_iterator, mvm);
 863
 864         mvm->p2p_device_vif = NULL;
 865         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 866
 867         iwl_mvm_reset_phy_ctxts(mvm);
 868         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 869         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 870         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 871         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 872         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 873         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 874         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 875         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 876
 877         ieee80211_wake_queues(mvm->hw);
 878
 879         /* cleanup all stale references (scan, roc), but keep the
 880          * ucode_down ref until reconfig is complete */
 881         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 882
 883         /* clear any stale d0i3 state */
 884         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 885
 886         mvm->vif_count = 0;
 887         mvm->rx_ba_sessions = 0;
 888 }
 889
 890 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 891 {
 892         int ret;
 893
 894         lockdep_assert_held(&mvm->mutex);
 895
 896         /* Clean up some internal and mac80211 state on restart */
 897         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 898                 iwl_mvm_restart_cleanup(mvm);
 899
 900         ret = iwl_mvm_up(mvm);
 901
 902         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 903                 /* Something went wrong - we need to finish some cleanup
 904                  * that normally iwl_mvm_mac_restart_complete() below
 905                  * would do.
 906                  */
 907                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 908                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 909         }
 910
 911         return ret;
 912 }
 913
 914 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 915 {
 916         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 917         int ret;
 918
 919         mutex_lock(&mvm->mutex);
 920         ret = __iwl_mvm_mac_start(mvm);
 921         mutex_unlock(&mvm->mutex);
 922
 923         return ret;
 924 }
 925
 926 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 927 {
 928         int ret;
 929
 930         mutex_lock(&mvm->mutex);
 931
 932         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 933         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 934         ret = iwl_mvm_update_quotas(mvm, NULL);
 935         if (ret)
 936                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 937                         ret);
 938
 939         /* allow transport/FW low power modes */
 940         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 941
 942         mutex_unlock(&mvm->mutex);
 943 }
 944
 945 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
 946 {
 947         bool exit_now;
 948
 949         if (!iwl_mvm_is_d0i3_supported(mvm))
 950                 return;
 951
 952         mutex_lock(&mvm->d0i3_suspend_mutex);
 953         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
 954         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
 955                                         &mvm->d0i3_suspend_flags);
 956         mutex_unlock(&mvm->d0i3_suspend_mutex);
 957
 958         if (exit_now) {
 959                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
 960                 _iwl_mvm_exit_d0i3(mvm);
 961         }
 962 }
 963
 964 static void
 965 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 966                               enum ieee80211_reconfig_type reconfig_type)
 967 {
 968         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 969
 970         switch (reconfig_type) {
 971         case IEEE80211_RECONFIG_TYPE_RESTART:
 972                 iwl_mvm_restart_complete(mvm);
 973                 break;
 974         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 975                 iwl_mvm_resume_complete(mvm);
 976                 break;
 977         }
 978 }
 979
 980 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 981 {
 982         lockdep_assert_held(&mvm->mutex);
 983
 984         /* disallow low power states when the FW is down */
 985         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 986
 987         /* async_handlers_wk is now blocked */
 988
 989         /*
 990          * The work item could be running or queued if the
 991          * ROC time event stops just as we get here.
 992          */
 993         cancel_work_sync(&mvm->roc_done_wk);
 994
 995         iwl_trans_stop_device(mvm->trans);
 996
 997         iwl_mvm_async_handlers_purge(mvm);
 998         /* async_handlers_list is empty and will stay empty: HW is stopped */
 999
1000         /* the fw is stopped, the aux sta is dead: clean up driver state */
1001         iwl_mvm_del_aux_sta(mvm);
1002
1003         mvm->ucode_loaded = false;
1004 }
1005
1006 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1007 {
1008         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1009
1010         flush_work(&mvm->d0i3_exit_work);
1011         flush_work(&mvm->async_handlers_wk);
1012         flush_work(&mvm->fw_error_dump_wk);
1013
1014         mutex_lock(&mvm->mutex);
1015         __iwl_mvm_mac_stop(mvm);
1016         mutex_unlock(&mvm->mutex);
1017
1018         /*
1019          * The worker might have been waiting for the mutex, let it run and
1020          * discover that its list is now empty.
1021          */
1022         cancel_work_sync(&mvm->async_handlers_wk);
1023 }
1024
1025 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1026 {
1027         u16 i;
1028
1029         lockdep_assert_held(&mvm->mutex);
1030
1031         for (i = 0; i < NUM_PHY_CTX; i++)
1032                 if (!mvm->phy_ctxts[i].ref)
1033                         return &mvm->phy_ctxts[i];
1034
1035         IWL_ERR(mvm, "No available PHY context\n");
1036         return NULL;
1037 }
1038
1039 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1040                                 s8 tx_power)
1041 {
1042         /* FW is in charge of regulatory enforcement */
1043         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1044                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1045                 .pwr_restriction = cpu_to_le16(tx_power),
1046         };
1047
1048         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1049                                     sizeof(reduce_txpwr_cmd),
1050                                     &reduce_txpwr_cmd);
1051 }
1052
1053 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1054                                      struct ieee80211_vif *vif)
1055 {
1056         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1057         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1058         int ret;
1059
1060         /*
1061          * make sure D0i3 exit is completed, otherwise a target access
1062          * during tx queue configuration could be done when still in
1063          * D0i3 state.
1064          */
1065         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1066         if (ret)
1067                 return ret;
1068
1069         /*
1070          * Not much to do here. The stack will not allow interface
1071          * types or combinations that we didn't advertise, so we
1072          * don't really have to check the types.
1073          */
1074
1075         mutex_lock(&mvm->mutex);
1076
1077         /* Allocate resources for the MAC context, and add it to the fw  */
1078         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1079         if (ret)
1080                 goto out_unlock;
1081
1082         /* Counting number of interfaces is needed for legacy PM */
1083         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1084                 mvm->vif_count++;
1085
1086         /*
1087          * The AP binding flow can be done only after the beacon
1088          * template is configured (which happens only in the mac80211
1089          * start_ap() flow), and adding the broadcast station can happen
1090          * only after the binding.
1091          * In addition, since modifying the MAC before adding a bcast
1092          * station is not allowed by the FW, delay the adding of MAC context to
1093          * the point where we can also add the bcast station.
1094          * In short: there's not much we can do at this point, other than
1095          * allocating resources :)
1096          */
1097         if (vif->type == NL80211_IFTYPE_AP ||
1098             vif->type == NL80211_IFTYPE_ADHOC) {
1099                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1100                 if (ret) {
1101                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1102                         goto out_release;
1103                 }
1104
1105                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1106                 goto out_unlock;
1107         }
1108
1109         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1110         if (ret)
1111                 goto out_release;
1112
1113         ret = iwl_mvm_power_update_mac(mvm);
1114         if (ret)
1115                 goto out_release;
1116
1117         /* beacon filtering */
1118         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1119         if (ret)
1120                 goto out_remove_mac;
1121
1122         if (!mvm->bf_allowed_vif &&
1123             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1124                 mvm->bf_allowed_vif = mvmvif;
1125                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1126                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1127         }
1128
1129         /*
1130          * P2P_DEVICE interface does not have a channel context assigned to it,
1131          * so a dedicated PHY context is allocated to it and the corresponding
1132          * MAC context is bound to it at this stage.
1133          */
1134         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1135
1136                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1137                 if (!mvmvif->phy_ctxt) {
1138                         ret = -ENOSPC;
1139                         goto out_free_bf;
1140                 }
1141
1142                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1143                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1144                 if (ret)
1145                         goto out_unref_phy;
1146
1147                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1148                 if (ret)
1149                         goto out_unbind;
1150
1151                 /* Save a pointer to p2p device vif, so it can later be used to
1152                  * update the p2p device MAC when a GO is started/stopped */
1153                 mvm->p2p_device_vif = vif;
1154         }
1155
1156         iwl_mvm_vif_dbgfs_register(mvm, vif);
1157         goto out_unlock;
1158
1159  out_unbind:
1160         iwl_mvm_binding_remove_vif(mvm, vif);
1161  out_unref_phy:
1162         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1163  out_free_bf:
1164         if (mvm->bf_allowed_vif == mvmvif) {
1165                 mvm->bf_allowed_vif = NULL;
1166                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1167                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1168         }
1169  out_remove_mac:
1170         mvmvif->phy_ctxt = NULL;
1171         iwl_mvm_mac_ctxt_remove(mvm, vif);
1172  out_release:
1173         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1174                 mvm->vif_count--;
1175
1176         iwl_mvm_mac_ctxt_release(mvm, vif);
1177  out_unlock:
1178         mutex_unlock(&mvm->mutex);
1179
1180         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1181
1182         return ret;
1183 }
1184
1185 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1186                                         struct ieee80211_vif *vif)
1187 {
1188         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1189
1190         if (tfd_msk) {
1191                 mutex_lock(&mvm->mutex);
1192                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1193                 mutex_unlock(&mvm->mutex);
1194         }
1195
1196         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1197                 /*
1198                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1199                  * We assume here that all the packets sent to the OFFCHANNEL
1200                  * queue are sent in ROC session.
1201                  */
1202                 flush_work(&mvm->roc_done_wk);
1203         } else {
1204                 /*
1205                  * By now, all the AC queues are empty. The AGG queues are
1206                  * empty too. We already got all the Tx responses for all the
1207                  * packets in the queues. The drain work can have been
1208                  * triggered. Flush it.
1209                  */
1210                 flush_work(&mvm->sta_drained_wk);
1211         }
1212 }
1213
1214 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1215                                          struct ieee80211_vif *vif)
1216 {
1217         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1218         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1219
1220         iwl_mvm_prepare_mac_removal(mvm, vif);
1221
1222         mutex_lock(&mvm->mutex);
1223
1224         if (mvm->bf_allowed_vif == mvmvif) {
1225                 mvm->bf_allowed_vif = NULL;
1226                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1227                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1228         }
1229
1230         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1231
1232         /*
1233          * For AP/GO interface, the tear down of the resources allocated to the
1234          * interface is be handled as part of the stop_ap flow.
1235          */
1236         if (vif->type == NL80211_IFTYPE_AP ||
1237             vif->type == NL80211_IFTYPE_ADHOC) {
1238 #ifdef CONFIG_NL80211_TESTMODE
1239                 if (vif == mvm->noa_vif) {
1240                         mvm->noa_vif = NULL;
1241                         mvm->noa_duration = 0;
1242                 }
1243 #endif
1244                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1245                 goto out_release;
1246         }
1247
1248         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1249                 mvm->p2p_device_vif = NULL;
1250                 iwl_mvm_rm_bcast_sta(mvm, vif);
1251                 iwl_mvm_binding_remove_vif(mvm, vif);
1252                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1253                 mvmvif->phy_ctxt = NULL;
1254         }
1255
1256         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1257                 mvm->vif_count--;
1258
1259         iwl_mvm_power_update_mac(mvm);
1260         iwl_mvm_mac_ctxt_remove(mvm, vif);
1261
1262 out_release:
1263         iwl_mvm_mac_ctxt_release(mvm, vif);
1264         mutex_unlock(&mvm->mutex);
1265 }
1266
1267 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1268 {
1269         return 0;
1270 }
1271
1272 struct iwl_mvm_mc_iter_data {
1273         struct iwl_mvm *mvm;
1274         int port_id;
1275 };
1276
1277 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1278                                       struct ieee80211_vif *vif)
1279 {
1280         struct iwl_mvm_mc_iter_data *data = _data;
1281         struct iwl_mvm *mvm = data->mvm;
1282         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1283         int ret, len;
1284
1285         /* if we don't have free ports, mcast frames will be dropped */
1286         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1287                 return;
1288
1289         if (vif->type != NL80211_IFTYPE_STATION ||
1290             !vif->bss_conf.assoc)
1291                 return;
1292
1293         cmd->port_id = data->port_id++;
1294         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1295         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1296
1297         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1298         if (ret)
1299                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1300 }
1301
1302 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1303 {
1304         struct iwl_mvm_mc_iter_data iter_data = {
1305                 .mvm = mvm,
1306         };
1307
1308         lockdep_assert_held(&mvm->mutex);
1309
1310         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1311                 return;
1312
1313         ieee80211_iterate_active_interfaces_atomic(
1314                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1315                 iwl_mvm_mc_iface_iterator, &iter_data);
1316 }
1317
1318 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1319                                      struct netdev_hw_addr_list *mc_list)
1320 {
1321         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1322         struct iwl_mcast_filter_cmd *cmd;
1323         struct netdev_hw_addr *addr;
1324         int addr_count;
1325         bool pass_all;
1326         int len;
1327
1328         addr_count = netdev_hw_addr_list_count(mc_list);
1329         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1330                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1331         if (pass_all)
1332                 addr_count = 0;
1333
1334         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1335         cmd = kzalloc(len, GFP_ATOMIC);
1336         if (!cmd)
1337                 return 0;
1338
1339         if (pass_all) {
1340                 cmd->pass_all = 1;
1341                 return (u64)(unsigned long)cmd;
1342         }
1343
1344         netdev_hw_addr_list_for_each(addr, mc_list) {
1345                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1346                                    cmd->count, addr->addr);
1347                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1348                        addr->addr, ETH_ALEN);
1349                 cmd->count++;
1350         }
1351
1352         return (u64)(unsigned long)cmd;
1353 }
1354
1355 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1356                                      unsigned int changed_flags,
1357                                      unsigned int *total_flags,
1358                                      u64 multicast)
1359 {
1360         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1361         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1362
1363         mutex_lock(&mvm->mutex);
1364
1365         /* replace previous configuration */
1366         kfree(mvm->mcast_filter_cmd);
1367         mvm->mcast_filter_cmd = cmd;
1368
1369         if (!cmd)
1370                 goto out;
1371
1372         iwl_mvm_recalc_multicast(mvm);
1373 out:
1374         mutex_unlock(&mvm->mutex);
1375         *total_flags = 0;
1376 }
1377
1378 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1379 struct iwl_bcast_iter_data {
1380         struct iwl_mvm *mvm;
1381         struct iwl_bcast_filter_cmd *cmd;
1382         u8 current_filter;
1383 };
1384
1385 static void
1386 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1387                          const struct iwl_fw_bcast_filter *in_filter,
1388                          struct iwl_fw_bcast_filter *out_filter)
1389 {
1390         struct iwl_fw_bcast_filter_attr *attr;
1391         int i;
1392
1393         memcpy(out_filter, in_filter, sizeof(*out_filter));
1394
1395         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1396                 attr = &out_filter->attrs[i];
1397
1398                 if (!attr->mask)
1399                         break;
1400
1401                 switch (attr->reserved1) {
1402                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1403                         if (vif->bss_conf.arp_addr_cnt != 1) {
1404                                 attr->mask = 0;
1405                                 continue;
1406                         }
1407
1408                         attr->val = vif->bss_conf.arp_addr_list[0];
1409                         break;
1410                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1411                         attr->val = *(__be32 *)&vif->addr[2];
1412                         break;
1413                 default:
1414                         break;
1415                 }
1416                 attr->reserved1 = 0;
1417                 out_filter->num_attrs++;
1418         }
1419 }
1420
1421 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1422                                           struct ieee80211_vif *vif)
1423 {
1424         struct iwl_bcast_iter_data *data = _data;
1425         struct iwl_mvm *mvm = data->mvm;
1426         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1427         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1428         struct iwl_fw_bcast_mac *bcast_mac;
1429         int i;
1430
1431         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1432                 return;
1433
1434         bcast_mac = &cmd->macs[mvmvif->id];
1435
1436         /*
1437          * enable filtering only for associated stations, but not for P2P
1438          * Clients
1439          */
1440         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1441             !vif->bss_conf.assoc)
1442                 return;
1443
1444         bcast_mac->default_discard = 1;
1445
1446         /* copy all configured filters */
1447         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1448                 /*
1449                  * Make sure we don't exceed our filters limit.
1450                  * if there is still a valid filter to be configured,
1451                  * be on the safe side and just allow bcast for this mac.
1452                  */
1453                 if (WARN_ON_ONCE(data->current_filter >=
1454                                  ARRAY_SIZE(cmd->filters))) {
1455                         bcast_mac->default_discard = 0;
1456                         bcast_mac->attached_filters = 0;
1457                         break;
1458                 }
1459
1460                 iwl_mvm_set_bcast_filter(vif,
1461                                          &mvm->bcast_filters[i],
1462                                          &cmd->filters[data->current_filter]);
1463
1464                 /* skip current filter if it contains no attributes */
1465                 if (!cmd->filters[data->current_filter].num_attrs)
1466                         continue;
1467
1468                 /* attach the filter to current mac */
1469                 bcast_mac->attached_filters |=
1470                                 cpu_to_le16(BIT(data->current_filter));
1471
1472                 data->current_filter++;
1473         }
1474 }
1475
1476 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1477                                     struct iwl_bcast_filter_cmd *cmd)
1478 {
1479         struct iwl_bcast_iter_data iter_data = {
1480                 .mvm = mvm,
1481                 .cmd = cmd,
1482         };
1483
1484         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1485                 return false;
1486
1487         memset(cmd, 0, sizeof(*cmd));
1488         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1489         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1490
1491 #ifdef CONFIG_IWLWIFI_DEBUGFS
1492         /* use debugfs filters/macs if override is configured */
1493         if (mvm->dbgfs_bcast_filtering.override) {
1494                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1495                        sizeof(cmd->filters));
1496                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1497                        sizeof(cmd->macs));
1498                 return true;
1499         }
1500 #endif
1501
1502         /* if no filters are configured, do nothing */
1503         if (!mvm->bcast_filters)
1504                 return false;
1505
1506         /* configure and attach these filters for each associated sta vif */
1507         ieee80211_iterate_active_interfaces(
1508                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1509                 iwl_mvm_bcast_filter_iterator, &iter_data);
1510
1511         return true;
1512 }
1513 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1514                                           struct ieee80211_vif *vif)
1515 {
1516         struct iwl_bcast_filter_cmd cmd;
1517
1518         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1519                 return 0;
1520
1521         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1522                 return 0;
1523
1524         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1525                                     sizeof(cmd), &cmd);
1526 }
1527 #else
1528 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1529                                                  struct ieee80211_vif *vif)
1530 {
1531         return 0;
1532 }
1533 #endif
1534
1535 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1536                                              struct ieee80211_vif *vif,
1537                                              struct ieee80211_bss_conf *bss_conf,
1538                                              u32 changes)
1539 {
1540         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1541         int ret;
1542
1543         /*
1544          * Re-calculate the tsf id, as the master-slave relations depend on the
1545          * beacon interval, which was not known when the station interface was
1546          * added.
1547          */
1548         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1549                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1550
1551         /*
1552          * If we're not associated yet, take the (new) BSSID before associating
1553          * so the firmware knows. If we're already associated, then use the old
1554          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1555          * branch for disassociation below.
1556          */
1557         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1558                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1559
1560         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1561         if (ret)
1562                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1563
1564         /* after sending it once, adopt mac80211 data */
1565         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1566         mvmvif->associated = bss_conf->assoc;
1567
1568         if (changes & BSS_CHANGED_ASSOC) {
1569                 if (bss_conf->assoc) {
1570                         /* add quota for this interface */
1571                         ret = iwl_mvm_update_quotas(mvm, NULL);
1572                         if (ret) {
1573                                 IWL_ERR(mvm, "failed to update quotas\n");
1574                                 return;
1575                         }
1576
1577                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1578                                      &mvm->status)) {
1579                                 /*
1580                                  * If we're restarting then the firmware will
1581                                  * obviously have lost synchronisation with
1582                                  * the AP. It will attempt to synchronise by
1583                                  * itself, but we can make it more reliable by
1584                                  * scheduling a session protection time event.
1585                                  *
1586                                  * The firmware needs to receive a beacon to
1587                                  * catch up with synchronisation, use 110% of
1588                                  * the beacon interval.
1589                                  *
1590                                  * Set a large maximum delay to allow for more
1591                                  * than a single interface.
1592                                  */
1593                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1594                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1595                                                         5 * dur, false);
1596                         }
1597
1598                         iwl_mvm_sf_update(mvm, vif, false);
1599                         iwl_mvm_power_vif_assoc(mvm, vif);
1600                         if (vif->p2p) {
1601                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1602                                 iwl_mvm_update_smps(mvm, vif,
1603                                                     IWL_MVM_SMPS_REQ_PROT,
1604                                                     IEEE80211_SMPS_DYNAMIC);
1605                         }
1606                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1607                         /*
1608                          * If update fails - SF might be running in associated
1609                          * mode while disassociated - which is forbidden.
1610                          */
1611                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1612                                   "Failed to update SF upon disassociation\n");
1613
1614                         /* remove AP station now that the MAC is unassoc */
1615                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1616                         if (ret)
1617                                 IWL_ERR(mvm, "failed to remove AP station\n");
1618
1619                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1620                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1621                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1622                         /* remove quota for this interface */
1623                         ret = iwl_mvm_update_quotas(mvm, NULL);
1624                         if (ret)
1625                                 IWL_ERR(mvm, "failed to update quotas\n");
1626
1627                         if (vif->p2p)
1628                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1629
1630                         /* this will take the cleared BSSID from bss_conf */
1631                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1632                         if (ret)
1633                                 IWL_ERR(mvm,
1634                                         "failed to update MAC %pM (clear after unassoc)\n",
1635                                         vif->addr);
1636                 }
1637
1638                 iwl_mvm_recalc_multicast(mvm);
1639                 iwl_mvm_configure_bcast_filter(mvm, vif);
1640
1641                 /* reset rssi values */
1642                 mvmvif->bf_data.ave_beacon_signal = 0;
1643
1644                 iwl_mvm_bt_coex_vif_change(mvm);
1645                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1646                                     IEEE80211_SMPS_AUTOMATIC);
1647         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1648                 /*
1649                  * We received a beacon _after_ association so
1650                  * remove the session protection.
1651                  */
1652                 iwl_mvm_remove_time_event(mvm, mvmvif,
1653                                           &mvmvif->time_event_data);
1654         }
1655
1656         if (changes & BSS_CHANGED_BEACON_INFO) {
1657                 iwl_mvm_sf_update(mvm, vif, false);
1658                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1659         }
1660
1661         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1662                 ret = iwl_mvm_power_update_mac(mvm);
1663                 if (ret)
1664                         IWL_ERR(mvm, "failed to update power mode\n");
1665         }
1666
1667         if (changes & BSS_CHANGED_TXPOWER) {
1668                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1669                                 bss_conf->txpower);
1670                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1671         }
1672
1673         if (changes & BSS_CHANGED_CQM) {
1674                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1675                 /* reset cqm events tracking */
1676                 mvmvif->bf_data.last_cqm_event = 0;
1677                 if (mvmvif->bf_data.bf_enabled) {
1678                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1679                         if (ret)
1680                                 IWL_ERR(mvm,
1681                                         "failed to update CQM thresholds\n");
1682                 }
1683         }
1684
1685         if (changes & BSS_CHANGED_ARP_FILTER) {
1686                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1687                 iwl_mvm_configure_bcast_filter(mvm, vif);
1688         }
1689 }
1690
1691 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1692                                  struct ieee80211_vif *vif)
1693 {
1694         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1695         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1696         int ret;
1697
1698         /*
1699          * iwl_mvm_mac_ctxt_add() might read directly from the device
1700          * (the system time), so make sure it is available.
1701          */
1702         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1703         if (ret)
1704                 return ret;
1705
1706         mutex_lock(&mvm->mutex);
1707
1708         /* Send the beacon template */
1709         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1710         if (ret)
1711                 goto out_unlock;
1712
1713         /*
1714          * Re-calculate the tsf id, as the master-slave relations depend on the
1715          * beacon interval, which was not known when the AP interface was added.
1716          */
1717         if (vif->type == NL80211_IFTYPE_AP)
1718                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1719
1720         /* Add the mac context */
1721         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1722         if (ret)
1723                 goto out_unlock;
1724
1725         /* Perform the binding */
1726         ret = iwl_mvm_binding_add_vif(mvm, vif);
1727         if (ret)
1728                 goto out_remove;
1729
1730         /* Send the bcast station. At this stage the TBTT and DTIM time events
1731          * are added and applied to the scheduler */
1732         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1733         if (ret)
1734                 goto out_unbind;
1735
1736         /* must be set before quota calculations */
1737         mvmvif->ap_ibss_active = true;
1738
1739         /* power updated needs to be done before quotas */
1740         iwl_mvm_power_update_mac(mvm);
1741
1742         ret = iwl_mvm_update_quotas(mvm, NULL);
1743         if (ret)
1744                 goto out_quota_failed;
1745
1746         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1747         if (vif->p2p && mvm->p2p_device_vif)
1748                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1749
1750         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1751
1752         iwl_mvm_bt_coex_vif_change(mvm);
1753
1754         /* we don't support TDLS during DCM */
1755         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1756                 iwl_mvm_teardown_tdls_peers(mvm);
1757
1758         mutex_unlock(&mvm->mutex);
1759         return 0;
1760
1761 out_quota_failed:
1762         iwl_mvm_power_update_mac(mvm);
1763         mvmvif->ap_ibss_active = false;
1764         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1765 out_unbind:
1766         iwl_mvm_binding_remove_vif(mvm, vif);
1767 out_remove:
1768         iwl_mvm_mac_ctxt_remove(mvm, vif);
1769 out_unlock:
1770         mutex_unlock(&mvm->mutex);
1771         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1772         return ret;
1773 }
1774
1775 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1776                                  struct ieee80211_vif *vif)
1777 {
1778         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1779         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1780
1781         iwl_mvm_prepare_mac_removal(mvm, vif);
1782
1783         mutex_lock(&mvm->mutex);
1784
1785         /* Handle AP stop while in CSA */
1786         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1787                 iwl_mvm_remove_time_event(mvm, mvmvif,
1788                                           &mvmvif->time_event_data);
1789                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1790         }
1791
1792         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1793                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1794                 mvm->csa_tx_block_bcn_timeout = 0;
1795         }
1796
1797         mvmvif->ap_ibss_active = false;
1798         mvm->ap_last_beacon_gp2 = 0;
1799
1800         iwl_mvm_bt_coex_vif_change(mvm);
1801
1802         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1803
1804         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1805         if (vif->p2p && mvm->p2p_device_vif)
1806                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1807
1808         iwl_mvm_update_quotas(mvm, NULL);
1809         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1810         iwl_mvm_binding_remove_vif(mvm, vif);
1811
1812         iwl_mvm_power_update_mac(mvm);
1813
1814         iwl_mvm_mac_ctxt_remove(mvm, vif);
1815
1816         mutex_unlock(&mvm->mutex);
1817 }
1818
1819 static void
1820 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1821                                  struct ieee80211_vif *vif,
1822                                  struct ieee80211_bss_conf *bss_conf,
1823                                  u32 changes)
1824 {
1825         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1826
1827         /* Changes will be applied when the AP/IBSS is started */
1828         if (!mvmvif->ap_ibss_active)
1829                 return;
1830
1831         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1832                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1833             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1834                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1835
1836         /* Need to send a new beacon template to the FW */
1837         if (changes & BSS_CHANGED_BEACON &&
1838             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1839                 IWL_WARN(mvm, "Failed updating beacon data\n");
1840
1841         if (changes & BSS_CHANGED_TXPOWER) {
1842                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1843                                 bss_conf->txpower);
1844                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1845         }
1846
1847 }
1848
1849 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1850                                      struct ieee80211_vif *vif,
1851                                      struct ieee80211_bss_conf *bss_conf,
1852                                      u32 changes)
1853 {
1854         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1855
1856         /*
1857          * iwl_mvm_bss_info_changed_station() might call
1858          * iwl_mvm_protect_session(), which reads directly from
1859          * the device (the system time), so make sure it is available.
1860          */
1861         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1862                 return;
1863
1864         mutex_lock(&mvm->mutex);
1865
1866         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1867                 iwl_mvm_scan_offload_stop(mvm, true);
1868
1869         switch (vif->type) {
1870         case NL80211_IFTYPE_STATION:
1871                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1872                 break;
1873         case NL80211_IFTYPE_AP:
1874         case NL80211_IFTYPE_ADHOC:
1875                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1876                 break;
1877         default:
1878                 /* shouldn't happen */
1879                 WARN_ON_ONCE(1);
1880         }
1881
1882         mutex_unlock(&mvm->mutex);
1883         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1884 }
1885
1886 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1887                                           enum iwl_scan_status scan_type)
1888 {
1889         int ret;
1890         bool wait_for_handlers = false;
1891
1892         mutex_lock(&mvm->mutex);
1893
1894         if (mvm->scan_status != scan_type) {
1895                 ret = 0;
1896                 /* make sure there are no pending notifications */
1897                 wait_for_handlers = true;
1898                 goto out;
1899         }
1900
1901         switch (scan_type) {
1902         case IWL_MVM_SCAN_SCHED:
1903                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1904                 break;
1905         case IWL_MVM_SCAN_OS:
1906                 ret = iwl_mvm_cancel_scan(mvm);
1907                 break;
1908         case IWL_MVM_SCAN_NONE:
1909         default:
1910                 WARN_ON_ONCE(1);
1911                 ret = -EINVAL;
1912                 break;
1913         }
1914         if (ret)
1915                 goto out;
1916
1917         wait_for_handlers = true;
1918 out:
1919         mutex_unlock(&mvm->mutex);
1920
1921         /* make sure we consume the completion notification */
1922         if (wait_for_handlers)
1923                 iwl_mvm_wait_for_async_handlers(mvm);
1924
1925         return ret;
1926 }
1927 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1928                                struct ieee80211_vif *vif,
1929                                struct ieee80211_scan_request *hw_req)
1930 {
1931         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1932         struct cfg80211_scan_request *req = &hw_req->req;
1933         int ret;
1934
1935         if (req->n_channels == 0 ||
1936             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1937                 return -EINVAL;
1938
1939         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1940                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1941                 if (ret)
1942                         return ret;
1943         }
1944
1945         mutex_lock(&mvm->mutex);
1946
1947         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1948                 ret = -EBUSY;
1949                 goto out;
1950         }
1951
1952         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1953
1954         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1955                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1956         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1957                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1958         else
1959                 ret = iwl_mvm_scan_request(mvm, vif, req);
1960
1961         if (ret)
1962                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1963 out:
1964         mutex_unlock(&mvm->mutex);
1965         return ret;
1966 }
1967
1968 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1969                                        struct ieee80211_vif *vif)
1970 {
1971         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1972
1973         mutex_lock(&mvm->mutex);
1974
1975         iwl_mvm_cancel_scan(mvm);
1976
1977         mutex_unlock(&mvm->mutex);
1978 }
1979
1980 static void
1981 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1982                                   struct ieee80211_sta *sta, u16 tids,
1983                                   int num_frames,
1984                                   enum ieee80211_frame_release_type reason,
1985                                   bool more_data)
1986 {
1987         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1988
1989         /* Called when we need to transmit (a) frame(s) from mac80211 */
1990
1991         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1992                                           tids, more_data, false);
1993 }
1994
1995 static void
1996 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1997                                     struct ieee80211_sta *sta, u16 tids,
1998                                     int num_frames,
1999                                     enum ieee80211_frame_release_type reason,
2000                                     bool more_data)
2001 {
2002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2003
2004         /* Called when we need to transmit (a) frame(s) from agg queue */
2005
2006         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2007                                           tids, more_data, true);
2008 }
2009
2010 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2011                                    struct ieee80211_vif *vif,
2012                                    enum sta_notify_cmd cmd,
2013                                    struct ieee80211_sta *sta)
2014 {
2015         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2016         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2017         int tid;
2018
2019         switch (cmd) {
2020         case STA_NOTIFY_SLEEP:
2021                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2022                         ieee80211_sta_block_awake(hw, sta, true);
2023                 spin_lock_bh(&mvmsta->lock);
2024                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2025                         struct iwl_mvm_tid_data *tid_data;
2026
2027                         tid_data = &mvmsta->tid_data[tid];
2028                         if (tid_data->state != IWL_AGG_ON &&
2029                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2030                                 continue;
2031                         if (iwl_mvm_tid_queued(tid_data) == 0)
2032                                 continue;
2033                         ieee80211_sta_set_buffered(sta, tid, true);
2034                 }
2035                 spin_unlock_bh(&mvmsta->lock);
2036                 /*
2037                  * The fw updates the STA to be asleep. Tx packets on the Tx
2038                  * queues to this station will not be transmitted. The fw will
2039                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2040                  */
2041                 break;
2042         case STA_NOTIFY_AWAKE:
2043                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2044                         break;
2045                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2046                 break;
2047         default:
2048                 break;
2049         }
2050 }
2051
2052 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2053                                        struct ieee80211_vif *vif,
2054                                        struct ieee80211_sta *sta)
2055 {
2056         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2057         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2058
2059         /*
2060          * This is called before mac80211 does RCU synchronisation,
2061          * so here we already invalidate our internal RCU-protected
2062          * station pointer. The rest of the code will thus no longer
2063          * be able to find the station this way, and we don't rely
2064          * on further RCU synchronisation after the sta_state()
2065          * callback deleted the station.
2066          */
2067         mutex_lock(&mvm->mutex);
2068         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2069                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2070                                    ERR_PTR(-ENOENT));
2071         mutex_unlock(&mvm->mutex);
2072 }
2073
2074 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2075                                  struct ieee80211_vif *vif,
2076                                  struct ieee80211_sta *sta,
2077                                  enum ieee80211_sta_state old_state,
2078                                  enum ieee80211_sta_state new_state)
2079 {
2080         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2081         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2082         int ret;
2083
2084         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2085                            sta->addr, old_state, new_state);
2086
2087         /* this would be a mac80211 bug ... but don't crash */
2088         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2089                 return -EINVAL;
2090
2091         /* if a STA is being removed, reuse its ID */
2092         flush_work(&mvm->sta_drained_wk);
2093
2094         mutex_lock(&mvm->mutex);
2095         if (old_state == IEEE80211_STA_NOTEXIST &&
2096             new_state == IEEE80211_STA_NONE) {
2097                 /*
2098                  * Firmware bug - it'll crash if the beacon interval is less
2099                  * than 16. We can't avoid connecting at all, so refuse the
2100                  * station state change, this will cause mac80211 to abandon
2101                  * attempts to connect to this AP, and eventually wpa_s will
2102                  * blacklist the AP...
2103                  */
2104                 if (vif->type == NL80211_IFTYPE_STATION &&
2105                     vif->bss_conf.beacon_int < 16) {
2106                         IWL_ERR(mvm,
2107                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2108                                 sta->addr, vif->bss_conf.beacon_int);
2109                         ret = -EINVAL;
2110                         goto out_unlock;
2111                 }
2112
2113                 if (sta->tdls &&
2114                     (vif->p2p ||
2115                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2116                                                 IWL_MVM_TDLS_STA_COUNT ||
2117                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2118                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2119                         ret = -EBUSY;
2120                         goto out_unlock;
2121                 }
2122
2123                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2124                 if (sta->tdls && ret == 0)
2125                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2126         } else if (old_state == IEEE80211_STA_NONE &&
2127                    new_state == IEEE80211_STA_AUTH) {
2128                 /*
2129                  * EBS may be disabled due to previous failures reported by FW.
2130                  * Reset EBS status here assuming environment has been changed.
2131                  */
2132                 mvm->last_ebs_successful = true;
2133                 ret = 0;
2134         } else if (old_state == IEEE80211_STA_AUTH &&
2135                    new_state == IEEE80211_STA_ASSOC) {
2136                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2137                 if (ret == 0)
2138                         iwl_mvm_rs_rate_init(mvm, sta,
2139                                              mvmvif->phy_ctxt->channel->band,
2140                                              true);
2141         } else if (old_state == IEEE80211_STA_ASSOC &&
2142                    new_state == IEEE80211_STA_AUTHORIZED) {
2143
2144                 /* we don't support TDLS during DCM */
2145                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2146                         iwl_mvm_teardown_tdls_peers(mvm);
2147
2148                 /* enable beacon filtering */
2149                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2150                 ret = 0;
2151         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2152                    new_state == IEEE80211_STA_ASSOC) {
2153                 /* disable beacon filtering */
2154                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2155                 ret = 0;
2156         } else if (old_state == IEEE80211_STA_ASSOC &&
2157                    new_state == IEEE80211_STA_AUTH) {
2158                 ret = 0;
2159         } else if (old_state == IEEE80211_STA_AUTH &&
2160                    new_state == IEEE80211_STA_NONE) {
2161                 ret = 0;
2162         } else if (old_state == IEEE80211_STA_NONE &&
2163                    new_state == IEEE80211_STA_NOTEXIST) {
2164                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2165                 if (sta->tdls)
2166                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2167         } else {
2168                 ret = -EIO;
2169         }
2170  out_unlock:
2171         mutex_unlock(&mvm->mutex);
2172
2173         return ret;
2174 }
2175
2176 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2177 {
2178         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2179
2180         mvm->rts_threshold = value;
2181
2182         return 0;
2183 }
2184
2185 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2186                                   struct ieee80211_vif *vif,
2187                                   struct ieee80211_sta *sta, u32 changed)
2188 {
2189         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2190
2191         if (vif->type == NL80211_IFTYPE_STATION &&
2192             changed & IEEE80211_RC_NSS_CHANGED)
2193                 iwl_mvm_sf_update(mvm, vif, false);
2194 }
2195
2196 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2197                                struct ieee80211_vif *vif, u16 ac,
2198                                const struct ieee80211_tx_queue_params *params)
2199 {
2200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2201         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2202
2203         mvmvif->queue_params[ac] = *params;
2204
2205         /*
2206          * No need to update right away, we'll get BSS_CHANGED_QOS
2207          * The exception is P2P_DEVICE interface which needs immediate update.
2208          */
2209         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2210                 int ret;
2211
2212                 mutex_lock(&mvm->mutex);
2213                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2214                 mutex_unlock(&mvm->mutex);
2215                 return ret;
2216         }
2217         return 0;
2218 }
2219
2220 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2221                                       struct ieee80211_vif *vif)
2222 {
2223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2224         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2225                            200 + vif->bss_conf.beacon_int);
2226         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2227                                100 + vif->bss_conf.beacon_int);
2228
2229         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2230                 return;
2231
2232         /*
2233          * iwl_mvm_protect_session() reads directly from the device
2234          * (the system time), so make sure it is available.
2235          */
2236         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2237                 return;
2238
2239         mutex_lock(&mvm->mutex);
2240         /* Try really hard to protect the session and hear a beacon */
2241         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2242         mutex_unlock(&mvm->mutex);
2243
2244         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2245 }
2246
2247 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2248                                         struct ieee80211_vif *vif,
2249                                         struct cfg80211_sched_scan_request *req,
2250                                         struct ieee80211_scan_ies *ies)
2251 {
2252         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2253         int ret;
2254
2255         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2256                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2257                 if (ret)
2258                         return ret;
2259         }
2260
2261         mutex_lock(&mvm->mutex);
2262
2263         /* Newest FW fixes sched scan while connected on another interface */
2264         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2265                 if (!vif->bss_conf.idle) {
2266                         ret = -EBUSY;
2267                         goto out;
2268                 }
2269         } else if (!iwl_mvm_is_idle(mvm)) {
2270                 ret = -EBUSY;
2271                 goto out;
2272         }
2273
2274         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2275                 ret = -EBUSY;
2276                 goto out;
2277         }
2278
2279         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2280         if (ret)
2281                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2282
2283 out:
2284         mutex_unlock(&mvm->mutex);
2285         return ret;
2286 }
2287
2288 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2289                                        struct ieee80211_vif *vif)
2290 {
2291         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2292         int ret;
2293
2294         mutex_lock(&mvm->mutex);
2295         ret = iwl_mvm_scan_offload_stop(mvm, false);
2296         mutex_unlock(&mvm->mutex);
2297         iwl_mvm_wait_for_async_handlers(mvm);
2298
2299         return ret;
2300
2301 }
2302
2303 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2304                                enum set_key_cmd cmd,
2305                                struct ieee80211_vif *vif,
2306                                struct ieee80211_sta *sta,
2307                                struct ieee80211_key_conf *key)
2308 {
2309         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2310         int ret;
2311
2312         if (iwlwifi_mod_params.sw_crypto) {
2313                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2314                 return -EOPNOTSUPP;
2315         }
2316
2317         switch (key->cipher) {
2318         case WLAN_CIPHER_SUITE_TKIP:
2319                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2320                 /* fall-through */
2321         case WLAN_CIPHER_SUITE_CCMP:
2322                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2323                 break;
2324         case WLAN_CIPHER_SUITE_AES_CMAC:
2325                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2326                 break;
2327         case WLAN_CIPHER_SUITE_WEP40:
2328         case WLAN_CIPHER_SUITE_WEP104:
2329                 /*
2330                  * Support for TX only, at least for now, so accept
2331                  * the key and do nothing else. Then mac80211 will
2332                  * pass it for TX but we don't have to use it for RX.
2333                  */
2334                 return 0;
2335         default:
2336                 /* currently FW supports only one optional cipher scheme */
2337                 if (hw->n_cipher_schemes &&
2338                     hw->cipher_schemes->cipher == key->cipher)
2339                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2340                 else
2341                         return -EOPNOTSUPP;
2342         }
2343
2344         mutex_lock(&mvm->mutex);
2345
2346         switch (cmd) {
2347         case SET_KEY:
2348                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2349                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2350                         /*
2351                          * GTK on AP interface is a TX-only key, return 0;
2352                          * on IBSS they're per-station and because we're lazy
2353                          * we don't support them for RX, so do the same.
2354                          */
2355                         ret = 0;
2356                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2357                         break;
2358                 }
2359
2360                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2361                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2362                 if (ret) {
2363                         IWL_WARN(mvm, "set key failed\n");
2364                         /*
2365                          * can't add key for RX, but we don't need it
2366                          * in the device for TX so still return 0
2367                          */
2368                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2369                         ret = 0;
2370                 }
2371
2372                 break;
2373         case DISABLE_KEY:
2374                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2375                         ret = 0;
2376                         break;
2377                 }
2378
2379                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2380                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2381                 break;
2382         default:
2383                 ret = -EINVAL;
2384         }
2385
2386         mutex_unlock(&mvm->mutex);
2387         return ret;
2388 }
2389
2390 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2391                                         struct ieee80211_vif *vif,
2392                                         struct ieee80211_key_conf *keyconf,
2393                                         struct ieee80211_sta *sta,
2394                                         u32 iv32, u16 *phase1key)
2395 {
2396         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2397
2398         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2399                 return;
2400
2401         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2402 }
2403
2404
2405 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2406                                struct iwl_rx_packet *pkt, void *data)
2407 {
2408         struct iwl_mvm *mvm =
2409                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2410         struct iwl_hs20_roc_res *resp;
2411         int resp_len = iwl_rx_packet_payload_len(pkt);
2412         struct iwl_mvm_time_event_data *te_data = data;
2413
2414         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2415                 return true;
2416
2417         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2418                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2419                 return true;
2420         }
2421
2422         resp = (void *)pkt->data;
2423
2424         IWL_DEBUG_TE(mvm,
2425                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2426                      resp->status, resp->event_unique_id);
2427
2428         te_data->uid = le32_to_cpu(resp->event_unique_id);
2429         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2430                      te_data->uid);
2431
2432         spin_lock_bh(&mvm->time_event_lock);
2433         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2434         spin_unlock_bh(&mvm->time_event_lock);
2435
2436         return true;
2437 }
2438
2439 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2440 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2441                                     struct ieee80211_channel *channel,
2442                                     struct ieee80211_vif *vif,
2443                                     int duration)
2444 {
2445         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2446         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2447         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2448         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2449         struct iwl_notification_wait wait_time_event;
2450         struct iwl_hs20_roc_req aux_roc_req = {
2451                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2452                 .id_and_color =
2453                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2454                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2455                 /* Set the channel info data */
2456                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2457                         PHY_BAND_24 : PHY_BAND_5,
2458                 .channel_info.channel = channel->hw_value,
2459                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2460                 /* Set the time and duration */
2461                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2462                 .apply_time_max_delay =
2463                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2464                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2465          };
2466
2467         /* Set the node address */
2468         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2469
2470         lockdep_assert_held(&mvm->mutex);
2471
2472         spin_lock_bh(&mvm->time_event_lock);
2473
2474         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2475                 spin_unlock_bh(&mvm->time_event_lock);
2476                 return -EIO;
2477         }
2478
2479         te_data->vif = vif;
2480         te_data->duration = duration;
2481         te_data->id = HOT_SPOT_CMD;
2482
2483         spin_unlock_bh(&mvm->time_event_lock);
2484
2485         /*
2486          * Use a notification wait, which really just processes the
2487          * command response and doesn't wait for anything, in order
2488          * to be able to process the response and get the UID inside
2489          * the RX path. Using CMD_WANT_SKB doesn't work because it
2490          * stores the buffer and then wakes up this thread, by which
2491          * time another notification (that the time event started)
2492          * might already be processed unsuccessfully.
2493          */
2494         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2495                                    time_event_response,
2496                                    ARRAY_SIZE(time_event_response),
2497                                    iwl_mvm_rx_aux_roc, te_data);
2498
2499         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2500                                    &aux_roc_req);
2501
2502         if (res) {
2503                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2504                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2505                 goto out_clear_te;
2506         }
2507
2508         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2509         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2510         /* should never fail */
2511         WARN_ON_ONCE(res);
2512
2513         if (res) {
2514  out_clear_te:
2515                 spin_lock_bh(&mvm->time_event_lock);
2516                 iwl_mvm_te_clear_data(mvm, te_data);
2517                 spin_unlock_bh(&mvm->time_event_lock);
2518         }
2519
2520         return res;
2521 }
2522
2523 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2524                        struct ieee80211_vif *vif,
2525                        struct ieee80211_channel *channel,
2526                        int duration,
2527                        enum ieee80211_roc_type type)
2528 {
2529         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2530         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2531         struct cfg80211_chan_def chandef;
2532         struct iwl_mvm_phy_ctxt *phy_ctxt;
2533         int ret, i;
2534
2535         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2536                            duration, type);
2537
2538         mutex_lock(&mvm->mutex);
2539
2540         switch (vif->type) {
2541         case NL80211_IFTYPE_STATION:
2542                 /* Use aux roc framework (HS20) */
2543                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2544                                                vif, duration);
2545                 goto out_unlock;
2546         case NL80211_IFTYPE_P2P_DEVICE:
2547                 /* handle below */
2548                 break;
2549         default:
2550                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2551                 ret = -EINVAL;
2552                 goto out_unlock;
2553         }
2554
2555         for (i = 0; i < NUM_PHY_CTX; i++) {
2556                 phy_ctxt = &mvm->phy_ctxts[i];
2557                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2558                         continue;
2559
2560                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2561                         /*
2562                          * Unbind the P2P_DEVICE from the current PHY context,
2563                          * and if the PHY context is not used remove it.
2564                          */
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 current 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                         goto schedule_time_event;
2580                 }
2581         }
2582
2583         /* Need to update the PHY context only if the ROC channel changed */
2584         if (channel == mvmvif->phy_ctxt->channel)
2585                 goto schedule_time_event;
2586
2587         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2588
2589         /*
2590          * Change the PHY context configuration as it is currently referenced
2591          * only by the P2P Device MAC
2592          */
2593         if (mvmvif->phy_ctxt->ref == 1) {
2594                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2595                                                &chandef, 1, 1);
2596                 if (ret)
2597                         goto out_unlock;
2598         } else {
2599                 /*
2600                  * The PHY context is shared with other MACs. Need to remove the
2601                  * P2P Device from the binding, allocate an new PHY context and
2602                  * create a new binding
2603                  */
2604                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2605                 if (!phy_ctxt) {
2606                         ret = -ENOSPC;
2607                         goto out_unlock;
2608                 }
2609
2610                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2611                                                1, 1);
2612                 if (ret) {
2613                         IWL_ERR(mvm, "Failed to change PHY context\n");
2614                         goto out_unlock;
2615                 }
2616
2617                 /* Unbind the P2P_DEVICE from the current PHY context */
2618                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2619                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2620                         goto out_unlock;
2621
2622                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2623
2624                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2625                 mvmvif->phy_ctxt = phy_ctxt;
2626
2627                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2628                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2629                         goto out_unlock;
2630
2631                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2632         }
2633
2634 schedule_time_event:
2635         /* Schedule the time events */
2636         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2637
2638 out_unlock:
2639         mutex_unlock(&mvm->mutex);
2640         IWL_DEBUG_MAC80211(mvm, "leave\n");
2641         return ret;
2642 }
2643
2644 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2645 {
2646         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2647
2648         IWL_DEBUG_MAC80211(mvm, "enter\n");
2649
2650         mutex_lock(&mvm->mutex);
2651         iwl_mvm_stop_p2p_roc(mvm);
2652         mutex_unlock(&mvm->mutex);
2653
2654         IWL_DEBUG_MAC80211(mvm, "leave\n");
2655         return 0;
2656 }
2657
2658 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2659                                  struct ieee80211_chanctx_conf *ctx)
2660 {
2661         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2662         struct iwl_mvm_phy_ctxt *phy_ctxt;
2663         int ret;
2664
2665         lockdep_assert_held(&mvm->mutex);
2666
2667         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2668
2669         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2670         if (!phy_ctxt) {
2671                 ret = -ENOSPC;
2672                 goto out;
2673         }
2674
2675         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2676                                        ctx->rx_chains_static,
2677                                        ctx->rx_chains_dynamic);
2678         if (ret) {
2679                 IWL_ERR(mvm, "Failed to add PHY context\n");
2680                 goto out;
2681         }
2682
2683         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2684         *phy_ctxt_id = phy_ctxt->id;
2685 out:
2686         return ret;
2687 }
2688
2689 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2690                                struct ieee80211_chanctx_conf *ctx)
2691 {
2692         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2693         int ret;
2694
2695         mutex_lock(&mvm->mutex);
2696         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2697         mutex_unlock(&mvm->mutex);
2698
2699         return ret;
2700 }
2701
2702 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2703                                      struct ieee80211_chanctx_conf *ctx)
2704 {
2705         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2706         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2707
2708         lockdep_assert_held(&mvm->mutex);
2709
2710         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2711 }
2712
2713 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2714                                    struct ieee80211_chanctx_conf *ctx)
2715 {
2716         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2717
2718         mutex_lock(&mvm->mutex);
2719         __iwl_mvm_remove_chanctx(mvm, ctx);
2720         mutex_unlock(&mvm->mutex);
2721 }
2722
2723 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2724                                    struct ieee80211_chanctx_conf *ctx,
2725                                    u32 changed)
2726 {
2727         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2728         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2729         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2730
2731         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2732                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2733                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2734                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2735                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2736                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2737                       phy_ctxt->ref, changed))
2738                 return;
2739
2740         mutex_lock(&mvm->mutex);
2741         iwl_mvm_bt_coex_vif_change(mvm);
2742         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2743                                  ctx->rx_chains_static,
2744                                  ctx->rx_chains_dynamic);
2745         mutex_unlock(&mvm->mutex);
2746 }
2747
2748 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2749                                         struct ieee80211_vif *vif,
2750                                         struct ieee80211_chanctx_conf *ctx,
2751                                         bool switching_chanctx)
2752 {
2753         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2754         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2755         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2756         int ret;
2757
2758         lockdep_assert_held(&mvm->mutex);
2759
2760         mvmvif->phy_ctxt = phy_ctxt;
2761
2762         switch (vif->type) {
2763         case NL80211_IFTYPE_AP:
2764                 /* Unless it's a CSA flow we have nothing to do here */
2765                 if (vif->csa_active) {
2766                         mvmvif->ap_ibss_active = true;
2767                         break;
2768                 }
2769         case NL80211_IFTYPE_ADHOC:
2770                 /*
2771                  * The AP binding flow is handled as part of the start_ap flow
2772                  * (in bss_info_changed), similarly for IBSS.
2773                  */
2774                 ret = 0;
2775                 goto out;
2776         case NL80211_IFTYPE_STATION:
2777                 break;
2778         case NL80211_IFTYPE_MONITOR:
2779                 /* always disable PS when a monitor interface is active */
2780                 mvmvif->ps_disabled = true;
2781                 break;
2782         default:
2783                 ret = -EINVAL;
2784                 goto out;
2785         }
2786
2787         ret = iwl_mvm_binding_add_vif(mvm, vif);
2788         if (ret)
2789                 goto out;
2790
2791         /*
2792          * Power state must be updated before quotas,
2793          * otherwise fw will complain.
2794          */
2795         iwl_mvm_power_update_mac(mvm);
2796
2797         /* Setting the quota at this stage is only required for monitor
2798          * interfaces. For the other types, the bss_info changed flow
2799          * will handle quota settings.
2800          */
2801         if (vif->type == NL80211_IFTYPE_MONITOR) {
2802                 mvmvif->monitor_active = true;
2803                 ret = iwl_mvm_update_quotas(mvm, NULL);
2804                 if (ret)
2805                         goto out_remove_binding;
2806         }
2807
2808         /* Handle binding during CSA */
2809         if ((vif->type == NL80211_IFTYPE_AP) ||
2810             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2811                 iwl_mvm_update_quotas(mvm, NULL);
2812                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2813         }
2814
2815         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2816                 struct iwl_mvm_sta *mvmsta;
2817
2818                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2819                                                           mvmvif->ap_sta_id);
2820
2821                 if (WARN_ON(!mvmsta))
2822                         goto out;
2823
2824                 /* TODO: only re-enable after the first beacon */
2825                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2826         }
2827
2828         goto out;
2829
2830 out_remove_binding:
2831         iwl_mvm_binding_remove_vif(mvm, vif);
2832         iwl_mvm_power_update_mac(mvm);
2833 out:
2834         if (ret)
2835                 mvmvif->phy_ctxt = NULL;
2836         return ret;
2837 }
2838 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2839                                       struct ieee80211_vif *vif,
2840                                       struct ieee80211_chanctx_conf *ctx)
2841 {
2842         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2843         int ret;
2844
2845         mutex_lock(&mvm->mutex);
2846         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2847         mutex_unlock(&mvm->mutex);
2848
2849         return ret;
2850 }
2851
2852 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2853                                            struct ieee80211_vif *vif,
2854                                            struct ieee80211_chanctx_conf *ctx,
2855                                            bool switching_chanctx)
2856 {
2857         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2858         struct ieee80211_vif *disabled_vif = NULL;
2859         struct iwl_mvm_sta *mvmsta;
2860
2861         lockdep_assert_held(&mvm->mutex);
2862
2863         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2864
2865         switch (vif->type) {
2866         case NL80211_IFTYPE_ADHOC:
2867                 goto out;
2868         case NL80211_IFTYPE_MONITOR:
2869                 mvmvif->monitor_active = false;
2870                 mvmvif->ps_disabled = false;
2871                 break;
2872         case NL80211_IFTYPE_AP:
2873                 /* This part is triggered only during CSA */
2874                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2875                         goto out;
2876
2877                 /* Set CS bit on all the stations */
2878                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2879
2880                 /* Save blocked iface, the timeout is set on the next beacon */
2881                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2882
2883                 mvmvif->ap_ibss_active = false;
2884                 break;
2885         case NL80211_IFTYPE_STATION:
2886                 if (!switching_chanctx)
2887                         break;
2888
2889                 disabled_vif = vif;
2890
2891                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2892                                                           mvmvif->ap_sta_id);
2893
2894                 if (!WARN_ON(!mvmsta))
2895                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2896
2897                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2898                 break;
2899         default:
2900                 break;
2901         }
2902
2903         iwl_mvm_update_quotas(mvm, disabled_vif);
2904         iwl_mvm_binding_remove_vif(mvm, vif);
2905
2906 out:
2907         mvmvif->phy_ctxt = NULL;
2908         iwl_mvm_power_update_mac(mvm);
2909 }
2910
2911 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2912                                          struct ieee80211_vif *vif,
2913                                          struct ieee80211_chanctx_conf *ctx)
2914 {
2915         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2916
2917         mutex_lock(&mvm->mutex);
2918         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2919         mutex_unlock(&mvm->mutex);
2920 }
2921
2922 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2923                                       struct ieee80211_vif_chanctx_switch *vifs,
2924                                       int n_vifs,
2925                                       enum ieee80211_chanctx_switch_mode mode)
2926 {
2927         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2928         int ret;
2929
2930         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2931         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2932                 return -EOPNOTSUPP;
2933
2934         mutex_lock(&mvm->mutex);
2935         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2936         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2937
2938         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2939         if (ret) {
2940                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2941                 goto out_reassign;
2942         }
2943
2944         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2945                                            true);
2946         if (ret) {
2947                 IWL_ERR(mvm,
2948                         "failed to assign new_ctx during channel switch\n");
2949                 goto out_remove;
2950         }
2951
2952         /* we don't support TDLS during DCM - can be caused by channel switch */
2953         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2954                 iwl_mvm_teardown_tdls_peers(mvm);
2955
2956         goto out;
2957
2958 out_remove:
2959         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2960
2961 out_reassign:
2962         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2963         if (ret) {
2964                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2965                 goto out_restart;
2966         }
2967
2968         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2969                                            true);
2970         if (ret) {
2971                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2972                 goto out_restart;
2973         }
2974
2975         goto out;
2976
2977 out_restart:
2978         /* things keep failing, better restart the hw */
2979         iwl_mvm_nic_restart(mvm, false);
2980
2981 out:
2982         mutex_unlock(&mvm->mutex);
2983         return ret;
2984 }
2985
2986 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2987                            struct ieee80211_sta *sta,
2988                            bool set)
2989 {
2990         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2991         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2992
2993         if (!mvm_sta || !mvm_sta->vif) {
2994                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2995                 return -EINVAL;
2996         }
2997
2998         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2999 }
3000
3001 #ifdef CONFIG_NL80211_TESTMODE
3002 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3003         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3004         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3005         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3006 };
3007
3008 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3009                                       struct ieee80211_vif *vif,
3010                                       void *data, int len)
3011 {
3012         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3013         int err;
3014         u32 noa_duration;
3015
3016         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3017         if (err)
3018                 return err;
3019
3020         if (!tb[IWL_MVM_TM_ATTR_CMD])
3021                 return -EINVAL;
3022
3023         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3024         case IWL_MVM_TM_CMD_SET_NOA:
3025                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3026                     !vif->bss_conf.enable_beacon ||
3027                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3028                         return -EINVAL;
3029
3030                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3031                 if (noa_duration >= vif->bss_conf.beacon_int)
3032                         return -EINVAL;
3033
3034                 mvm->noa_duration = noa_duration;
3035                 mvm->noa_vif = vif;
3036
3037                 return iwl_mvm_update_quotas(mvm, NULL);
3038         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3039                 /* must be associated client vif - ignore authorized */
3040                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3041                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3042                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3043                         return -EINVAL;
3044
3045                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3046                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3047                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3048         }
3049
3050         return -EOPNOTSUPP;
3051 }
3052
3053 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3054                                     struct ieee80211_vif *vif,
3055                                     void *data, int len)
3056 {
3057         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3058         int err;
3059
3060         mutex_lock(&mvm->mutex);
3061         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3062         mutex_unlock(&mvm->mutex);
3063
3064         return err;
3065 }
3066 #endif
3067
3068 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3069                                           struct ieee80211_vif *vif,
3070                                           struct cfg80211_chan_def *chandef)
3071 {
3072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3073         struct ieee80211_vif *csa_vif;
3074
3075         mutex_lock(&mvm->mutex);
3076
3077         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3078                                             lockdep_is_held(&mvm->mutex));
3079         if (WARN(csa_vif && csa_vif->csa_active,
3080                  "Another CSA is already in progress"))
3081                 goto out_unlock;
3082
3083         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3084                            chandef->center_freq1);
3085         rcu_assign_pointer(mvm->csa_vif, vif);
3086
3087 out_unlock:
3088         mutex_unlock(&mvm->mutex);
3089 }
3090
3091 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3092                               struct ieee80211_vif *vif, u32 queues, bool drop)
3093 {
3094         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3095         struct iwl_mvm_vif *mvmvif;
3096         struct iwl_mvm_sta *mvmsta;
3097
3098         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3099                 return;
3100
3101         mutex_lock(&mvm->mutex);
3102         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3103         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3104
3105         if (WARN_ON_ONCE(!mvmsta)) {
3106                 mutex_unlock(&mvm->mutex);
3107                 return;
3108         }
3109
3110         if (drop) {
3111                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3112                         IWL_ERR(mvm, "flush request fail\n");
3113                 mutex_unlock(&mvm->mutex);
3114         } else {
3115                 u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
3116                 mutex_unlock(&mvm->mutex);
3117
3118                 /* this can take a while, and we may need/want other operations
3119                  * to succeed while doing this, so do it without the mutex held
3120                  */
3121                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
3122         }
3123 }
3124
3125 const struct ieee80211_ops iwl_mvm_hw_ops = {
3126         .tx = iwl_mvm_mac_tx,
3127         .ampdu_action = iwl_mvm_mac_ampdu_action,
3128         .start = iwl_mvm_mac_start,
3129         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3130         .stop = iwl_mvm_mac_stop,
3131         .add_interface = iwl_mvm_mac_add_interface,
3132         .remove_interface = iwl_mvm_mac_remove_interface,
3133         .config = iwl_mvm_mac_config,
3134         .prepare_multicast = iwl_mvm_prepare_multicast,
3135         .configure_filter = iwl_mvm_configure_filter,
3136         .bss_info_changed = iwl_mvm_bss_info_changed,
3137         .hw_scan = iwl_mvm_mac_hw_scan,
3138         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3139         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3140         .sta_state = iwl_mvm_mac_sta_state,
3141         .sta_notify = iwl_mvm_mac_sta_notify,
3142         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3143         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3144         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3145         .sta_rc_update = iwl_mvm_sta_rc_update,
3146         .conf_tx = iwl_mvm_mac_conf_tx,
3147         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3148         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3149         .flush = iwl_mvm_mac_flush,
3150         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3151         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3152         .set_key = iwl_mvm_mac_set_key,
3153         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3154         .remain_on_channel = iwl_mvm_roc,
3155         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3156         .add_chanctx = iwl_mvm_add_chanctx,
3157         .remove_chanctx = iwl_mvm_remove_chanctx,
3158         .change_chanctx = iwl_mvm_change_chanctx,
3159         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3160         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3161         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3162
3163         .start_ap = iwl_mvm_start_ap_ibss,
3164         .stop_ap = iwl_mvm_stop_ap_ibss,
3165         .join_ibss = iwl_mvm_start_ap_ibss,
3166         .leave_ibss = iwl_mvm_stop_ap_ibss,
3167
3168         .set_tim = iwl_mvm_set_tim,
3169
3170         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3171
3172         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3173
3174 #ifdef CONFIG_PM_SLEEP
3175         /* look at d3.c */
3176         .suspend = iwl_mvm_suspend,
3177         .resume = iwl_mvm_resume,
3178         .set_wakeup = iwl_mvm_set_wakeup,
3179         .set_rekey_data = iwl_mvm_set_rekey_data,
3180 #if IS_ENABLED(CONFIG_IPV6)
3181         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3182 #endif
3183         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3184 #endif
3185 };