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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  46  *    the documentation and/or other materials provided with the
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <net/mac80211.h>
  73 #include <net/ieee80211_radiotap.h>
  74 #include <net/tcp.h>
  75
  76 #include "iwl-op-mode.h"
  77 #include "iwl-io.h"
  78 #include "mvm.h"
  79 #include "sta.h"
  80 #include "time-event.h"
  81 #include "iwl-eeprom-parse.h"
  82 #include "fw-api-scan.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87
  88 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  89         {
  90                 .max = 1,
  91                 .types = BIT(NL80211_IFTYPE_STATION),
  92         },
  93         {
  94                 .max = 1,
  95                 .types = BIT(NL80211_IFTYPE_AP) |
  96                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  97                         BIT(NL80211_IFTYPE_P2P_GO),
  98         },
  99         {
 100                 .max = 1,
 101                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 102         },
 103 };
 104
 105 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 106         {
 107                 .num_different_channels = 1,
 108                 .max_interfaces = 3,
 109                 .limits = iwl_mvm_limits,
 110                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 111         },
 112 };
 113
 114 #ifdef CONFIG_PM_SLEEP
 115 static const struct nl80211_wowlan_tcp_data_token_feature
 116 iwl_mvm_wowlan_tcp_token_feature = {
 117         .min_len = 0,
 118         .max_len = 255,
 119         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 120 };
 121
 122 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 123         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 124         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 125                             sizeof(struct ethhdr) -
 126                             sizeof(struct iphdr) -
 127                             sizeof(struct tcphdr),
 128         .data_interval_max = 65535, /* __le16 in API */
 129         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 130                             sizeof(struct ethhdr) -
 131                             sizeof(struct iphdr) -
 132                             sizeof(struct tcphdr),
 133         .seq = true,
 134 };
 135 #endif
 136
 137 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 138 /*
 139  * Use the reserved field to indicate magic values.
 140  * these values will only be used internally by the driver,
 141  * and won't make it to the fw (reserved will be 0).
 142  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 143  *      be the vif's ip address. in case there is not a single
 144  *      ip address (0, or more than 1), this attribute will
 145  *      be skipped.
 146  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 147  *      the LSB bytes of the vif's mac address
 148  */
 149 enum {
 150         BC_FILTER_MAGIC_NONE = 0,
 151         BC_FILTER_MAGIC_IP,
 152         BC_FILTER_MAGIC_MAC,
 153 };
 154
 155 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 156         {
 157                 /* arp */
 158                 .discard = 0,
 159                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 160                 .attrs = {
 161                         {
 162                                 /* frame type - arp, hw type - ethernet */
 163                                 .offset_type =
 164                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 165                                 .offset = sizeof(rfc1042_header),
 166                                 .val = cpu_to_be32(0x08060001),
 167                                 .mask = cpu_to_be32(0xffffffff),
 168                         },
 169                         {
 170                                 /* arp dest ip */
 171                                 .offset_type =
 172                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 173                                 .offset = sizeof(rfc1042_header) + 2 +
 174                                           sizeof(struct arphdr) +
 175                                           ETH_ALEN + sizeof(__be32) +
 176                                           ETH_ALEN,
 177                                 .mask = cpu_to_be32(0xffffffff),
 178                                 /* mark it as special field */
 179                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 180                         },
 181                 },
 182         },
 183         {
 184                 /* dhcp offer bcast */
 185                 .discard = 0,
 186                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 187                 .attrs = {
 188                         {
 189                                 /* udp dest port - 68 (bootp client)*/
 190                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 191                                 .offset = offsetof(struct udphdr, dest),
 192                                 .val = cpu_to_be32(0x00440000),
 193                                 .mask = cpu_to_be32(0xffff0000),
 194                         },
 195                         {
 196                                 /* dhcp - lsb bytes of client hw address */
 197                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 198                                 .offset = 38,
 199                                 .mask = cpu_to_be32(0xffffffff),
 200                                 /* mark it as special field */
 201                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 202                         },
 203                 },
 204         },
 205         /* last filter must be empty */
 206         {},
 207 };
 208 #endif
 209
 210 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 211 {
 212         if (!iwl_mvm_is_d0i3_supported(mvm))
 213                 return;
 214
 215         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 216         spin_lock_bh(&mvm->refs_lock);
 217         mvm->refs[ref_type]++;
 218         spin_unlock_bh(&mvm->refs_lock);
 219         iwl_trans_ref(mvm->trans);
 220 }
 221
 222 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 223 {
 224         if (!iwl_mvm_is_d0i3_supported(mvm))
 225                 return;
 226
 227         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 228         spin_lock_bh(&mvm->refs_lock);
 229         WARN_ON(!mvm->refs[ref_type]--);
 230         spin_unlock_bh(&mvm->refs_lock);
 231         iwl_trans_unref(mvm->trans);
 232 }
 233
 234 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 235                                      enum iwl_mvm_ref_type except_ref)
 236 {
 237         int i, j;
 238
 239         if (!iwl_mvm_is_d0i3_supported(mvm))
 240                 return;
 241
 242         spin_lock_bh(&mvm->refs_lock);
 243         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 244                 if (except_ref == i || !mvm->refs[i])
 245                         continue;
 246
 247                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 248                               i, mvm->refs[i]);
 249                 for (j = 0; j < mvm->refs[i]; j++)
 250                         iwl_trans_unref(mvm->trans);
 251                 mvm->refs[i] = 0;
 252         }
 253         spin_unlock_bh(&mvm->refs_lock);
 254 }
 255
 256 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 257 {
 258         iwl_mvm_ref(mvm, ref_type);
 259
 260         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 261                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 262                                 HZ)) {
 263                 WARN_ON_ONCE(1);
 264                 iwl_mvm_unref(mvm, ref_type);
 265                 return -EIO;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 272 {
 273         int i;
 274
 275         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 276         for (i = 0; i < NUM_PHY_CTX; i++) {
 277                 mvm->phy_ctxts[i].id = i;
 278                 mvm->phy_ctxts[i].ref = 0;
 279         }
 280 }
 281
 282 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 283 {
 284         /* we create the 802.11 header and SSID element */
 285         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 286                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 287         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 288 }
 289
 290 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 291 {
 292         struct ieee80211_hw *hw = mvm->hw;
 293         int num_mac, ret, i;
 294
 295         /* Tell mac80211 our characteristics */
 296         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 297                     IEEE80211_HW_SPECTRUM_MGMT |
 298                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 299                     IEEE80211_HW_QUEUE_CONTROL |
 300                     IEEE80211_HW_WANT_MONITOR_VIF |
 301                     IEEE80211_HW_SUPPORTS_PS |
 302                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 303                     IEEE80211_HW_AMPDU_AGGREGATION |
 304                     IEEE80211_HW_TIMING_BEACON_ONLY |
 305                     IEEE80211_HW_CONNECTION_MONITOR |
 306                     IEEE80211_HW_CHANCTX_STA_CSA |
 307                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 308
 309         hw->queues = mvm->first_agg_queue;
 310         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 311         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 312                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 313         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 314         hw->rate_control_algorithm = "iwl-mvm-rs";
 315
 316         /*
 317          * Enable 11w if advertised by firmware and software crypto
 318          * is not enabled (as the firmware will interpret some mgmt
 319          * packets, so enabling it with software crypto isn't safe)
 320          */
 321         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 322             !iwlwifi_mod_params.sw_crypto)
 323                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 324
 325         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 326             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 327             !iwlwifi_mod_params.uapsd_disable) {
 328                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 329                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 330                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 331         }
 332
 333         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 334                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 335
 336         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 337         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 338         hw->chanctx_data_size = sizeof(u16);
 339
 340         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 341                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 342                 BIT(NL80211_IFTYPE_AP) |
 343                 BIT(NL80211_IFTYPE_P2P_GO) |
 344                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 345                 BIT(NL80211_IFTYPE_ADHOC);
 346
 347         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 348         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 349                                        REGULATORY_DISABLE_BEACON_HINTS;
 350
 351         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 352                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 353
 354         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 355                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 356
 357         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 358         hw->wiphy->n_iface_combinations =
 359                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 360
 361         hw->wiphy->max_remain_on_channel_duration = 10000;
 362         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 363
 364         /* Extract MAC address */
 365         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 366         hw->wiphy->addresses = mvm->addresses;
 367         hw->wiphy->n_addresses = 1;
 368
 369         /* Extract additional MAC addresses if available */
 370         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 371                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 372
 373         for (i = 1; i < num_mac; i++) {
 374                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 375                        ETH_ALEN);
 376                 mvm->addresses[i].addr[5]++;
 377                 hw->wiphy->n_addresses++;
 378         }
 379
 380         iwl_mvm_reset_phy_ctxts(mvm);
 381
 382         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 383
 384         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 385
 386         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 387                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 388                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 389         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 390                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 391                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 392
 393         hw->wiphy->hw_version = mvm->trans->hw_id;
 394
 395         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 396                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 397         else
 398                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 399
 400         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 401                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 402                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 403                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 404                 /* we create the 802.11 header and zero length SSID IE. */
 405                 hw->wiphy->max_sched_scan_ie_len =
 406                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 407         }
 408
 409         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 410                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 411                                NL80211_FEATURE_P2P_GO_OPPPS |
 412                                NL80211_FEATURE_DYNAMIC_SMPS |
 413                                NL80211_FEATURE_STATIC_SMPS;
 414
 415         if (mvm->fw->ucode_capa.capa[0] &
 416             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 417                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 418         if (mvm->fw->ucode_capa.capa[0] &
 419             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 420                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 421
 422         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 423
 424         /* currently FW API supports only one optional cipher scheme */
 425         if (mvm->fw->cs[0].cipher) {
 426                 mvm->hw->n_cipher_schemes = 1;
 427                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 428         }
 429
 430 #ifdef CONFIG_PM_SLEEP
 431         if (iwl_mvm_is_d0i3_supported(mvm) &&
 432             device_can_wakeup(mvm->trans->dev)) {
 433                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 434                 hw->wiphy->wowlan = &mvm->wowlan;
 435         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 436             mvm->trans->ops->d3_suspend &&
 437             mvm->trans->ops->d3_resume &&
 438             device_can_wakeup(mvm->trans->dev)) {
 439                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 440                                     WIPHY_WOWLAN_DISCONNECT |
 441                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 442                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 443                 if (!iwlwifi_mod_params.sw_crypto)
 444                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 445                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 446                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 447
 448                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 449                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 450                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 451                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 452                 hw->wiphy->wowlan = &mvm->wowlan;
 453         }
 454 #endif
 455
 456 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 457         /* assign default bcast filtering configuration */
 458         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 459 #endif
 460
 461         ret = iwl_mvm_leds_init(mvm);
 462         if (ret)
 463                 return ret;
 464
 465         ret = ieee80211_register_hw(mvm->hw);
 466         if (ret)
 467                 iwl_mvm_leds_exit(mvm);
 468
 469         return ret;
 470 }
 471
 472 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 473                              struct ieee80211_sta *sta,
 474                              struct sk_buff *skb)
 475 {
 476         struct iwl_mvm_sta *mvmsta;
 477         bool defer = false;
 478
 479         /*
 480          * double check the IN_D0I3 flag both before and after
 481          * taking the spinlock, in order to prevent taking
 482          * the spinlock when not needed.
 483          */
 484         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 485                 return false;
 486
 487         spin_lock(&mvm->d0i3_tx_lock);
 488         /*
 489          * testing the flag again ensures the skb dequeue
 490          * loop (on d0i3 exit) hasn't run yet.
 491          */
 492         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 493                 goto out;
 494
 495         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 496         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 497             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 498                 goto out;
 499
 500         __skb_queue_tail(&mvm->d0i3_tx, skb);
 501         ieee80211_stop_queues(mvm->hw);
 502
 503         /* trigger wakeup */
 504         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 505         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 506
 507         defer = true;
 508 out:
 509         spin_unlock(&mvm->d0i3_tx_lock);
 510         return defer;
 511 }
 512
 513 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 514                            struct ieee80211_tx_control *control,
 515                            struct sk_buff *skb)
 516 {
 517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 518         struct ieee80211_sta *sta = control->sta;
 519         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 520         struct ieee80211_hdr *hdr = (void *)skb->data;
 521
 522         if (iwl_mvm_is_radio_killed(mvm)) {
 523                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 524                 goto drop;
 525         }
 526
 527         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 528             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 529                 goto drop;
 530
 531         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 532         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 533                      ieee80211_is_mgmt(hdr->frame_control) &&
 534                      !ieee80211_is_deauth(hdr->frame_control) &&
 535                      !ieee80211_is_disassoc(hdr->frame_control) &&
 536                      !ieee80211_is_action(hdr->frame_control)))
 537                 sta = NULL;
 538
 539         if (sta) {
 540                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 541                         return;
 542                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 543                         goto drop;
 544                 return;
 545         }
 546
 547         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 548                 goto drop;
 549         return;
 550  drop:
 551         ieee80211_free_txskb(hw, skb);
 552 }
 553
 554 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 555 {
 556         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 557                 return false;
 558         return true;
 559 }
 560
 561 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 562 {
 563         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 564                 return false;
 565         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 566                 return true;
 567
 568         /* enabled by default */
 569         return true;
 570 }
 571
 572 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 573                                     struct ieee80211_vif *vif,
 574                                     enum ieee80211_ampdu_mlme_action action,
 575                                     struct ieee80211_sta *sta, u16 tid,
 576                                     u16 *ssn, u8 buf_size)
 577 {
 578         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 579         int ret;
 580         bool tx_agg_ref = false;
 581
 582         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 583                      sta->addr, tid, action);
 584
 585         if (!(mvm->nvm_data->sku_cap_11n_enable))
 586                 return -EACCES;
 587
 588         /* return from D0i3 before starting a new Tx aggregation */
 589         switch (action) {
 590         case IEEE80211_AMPDU_TX_START:
 591         case IEEE80211_AMPDU_TX_STOP_CONT:
 592         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 593         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 594         case IEEE80211_AMPDU_TX_OPERATIONAL:
 595                 /*
 596                  * for tx start, wait synchronously until D0i3 exit to
 597                  * get the correct sequence number for the tid.
 598                  * additionally, some other ampdu actions use direct
 599                  * target access, which is not handled automatically
 600                  * by the trans layer (unlike commands), so wait for
 601                  * d0i3 exit in these cases as well.
 602                  */
 603                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 604                 if (ret)
 605                         return ret;
 606
 607                 tx_agg_ref = true;
 608                 break;
 609         default:
 610                 break;
 611         }
 612
 613         mutex_lock(&mvm->mutex);
 614
 615         switch (action) {
 616         case IEEE80211_AMPDU_RX_START:
 617                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 618                         ret = -EINVAL;
 619                         break;
 620                 }
 621                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 622                 break;
 623         case IEEE80211_AMPDU_RX_STOP:
 624                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 625                 break;
 626         case IEEE80211_AMPDU_TX_START:
 627                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 628                         ret = -EINVAL;
 629                         break;
 630                 }
 631                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 632                 break;
 633         case IEEE80211_AMPDU_TX_STOP_CONT:
 634                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 635                 break;
 636         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 637         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 638                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 639                 break;
 640         case IEEE80211_AMPDU_TX_OPERATIONAL:
 641                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 642                 break;
 643         default:
 644                 WARN_ON_ONCE(1);
 645                 ret = -EINVAL;
 646                 break;
 647         }
 648         mutex_unlock(&mvm->mutex);
 649
 650         /*
 651          * If the tid is marked as started, we won't use it for offloaded
 652          * traffic on the next D0i3 entry. It's safe to unref.
 653          */
 654         if (tx_agg_ref)
 655                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 656
 657         return ret;
 658 }
 659
 660 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 661                                      struct ieee80211_vif *vif)
 662 {
 663         struct iwl_mvm *mvm = data;
 664         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 665
 666         mvmvif->uploaded = false;
 667         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 668
 669         /* does this make sense at all? */
 670         mvmvif->color++;
 671
 672         spin_lock_bh(&mvm->time_event_lock);
 673         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 674         spin_unlock_bh(&mvm->time_event_lock);
 675
 676         mvmvif->phy_ctxt = NULL;
 677         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 678 }
 679
 680 #ifdef CONFIG_IWLWIFI_DEBUGFS
 681 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 682 {
 683         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 684         struct iwl_fw_error_dump_file *dump_file;
 685         struct iwl_fw_error_dump_data *dump_data;
 686         struct iwl_fw_error_dump_info *dump_info;
 687         struct iwl_mvm_dump_ptrs *fw_error_dump;
 688         const struct fw_img *img;
 689         u32 sram_len, sram_ofs;
 690         u32 file_len, rxf_len;
 691         unsigned long flags;
 692         int reg_val;
 693
 694         lockdep_assert_held(&mvm->mutex);
 695
 696         if (mvm->fw_error_dump)
 697                 return;
 698
 699         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 700         if (!fw_error_dump)
 701                 return;
 702
 703         img = &mvm->fw->img[mvm->cur_ucode];
 704         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 705         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 706
 707         /* reading buffer size */
 708         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 709         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 710
 711         /* the register holds the value divided by 128 */
 712         rxf_len = rxf_len << 7;
 713
 714         file_len = sizeof(*dump_file) +
 715                    sizeof(*dump_data) * 3 +
 716                    sram_len +
 717                    rxf_len +
 718                    sizeof(*dump_info);
 719
 720         dump_file = vzalloc(file_len);
 721         if (!dump_file) {
 722                 kfree(fw_error_dump);
 723                 return;
 724         }
 725
 726         fw_error_dump->op_mode_ptr = dump_file;
 727
 728         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 729         dump_data = (void *)dump_file->data;
 730
 731         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 732         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 733         dump_info = (void *) dump_data->data;
 734         dump_info->device_family =
 735                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 736                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 737                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 738         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 739                sizeof(dump_info->fw_human_readable));
 740         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 741                 sizeof(dump_info->dev_human_readable));
 742         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 743                 sizeof(dump_info->bus_human_readable));
 744
 745         dump_data = iwl_fw_error_next_data(dump_data);
 746         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 747         dump_data->len = cpu_to_le32(rxf_len);
 748
 749         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 750                 u32 *rxf = (void *)dump_data->data;
 751                 int i;
 752
 753                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 754                         iwl_trans_write_prph(mvm->trans,
 755                                              RXF_LD_FENCE_OFFSET_ADDR,
 756                                              i * sizeof(u32));
 757                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 758                                                      RXF_FIFO_RD_FENCE_ADDR);
 759                 }
 760                 iwl_trans_release_nic_access(mvm->trans, &flags);
 761         }
 762
 763         dump_data = iwl_fw_error_next_data(dump_data);
 764         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 765         dump_data->len = cpu_to_le32(sram_len);
 766         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 767                                  sram_len);
 768
 769         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 770         fw_error_dump->op_mode_len = file_len;
 771         if (fw_error_dump->trans_ptr)
 772                 file_len += fw_error_dump->trans_ptr->len;
 773         dump_file->file_len = cpu_to_le32(file_len);
 774         mvm->fw_error_dump = fw_error_dump;
 775
 776         /* notify the userspace about the error we had */
 777         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 778 }
 779 #endif
 780
 781 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 782 {
 783         iwl_mvm_fw_error_dump(mvm);
 784
 785         iwl_trans_stop_device(mvm->trans);
 786
 787         mvm->scan_status = IWL_MVM_SCAN_NONE;
 788         mvm->ps_disabled = false;
 789
 790         /* just in case one was running */
 791         ieee80211_remain_on_channel_expired(mvm->hw);
 792
 793         ieee80211_iterate_active_interfaces_atomic(
 794                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 795                 iwl_mvm_cleanup_iterator, mvm);
 796
 797         mvm->p2p_device_vif = NULL;
 798         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 799
 800         iwl_mvm_reset_phy_ctxts(mvm);
 801         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 802         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 803         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 804         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 805         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 806         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 807         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 808         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 809
 810         ieee80211_wake_queues(mvm->hw);
 811
 812         /* cleanup all stale references (scan, roc), but keep the
 813          * ucode_down ref until reconfig is complete */
 814         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 815
 816         /* clear any stale d0i3 state */
 817         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 818
 819         mvm->vif_count = 0;
 820         mvm->rx_ba_sessions = 0;
 821 }
 822
 823 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 824 {
 825         int ret;
 826
 827         lockdep_assert_held(&mvm->mutex);
 828
 829         /* Clean up some internal and mac80211 state on restart */
 830         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 831                 iwl_mvm_restart_cleanup(mvm);
 832
 833         ret = iwl_mvm_up(mvm);
 834
 835         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 836                 /* Something went wrong - we need to finish some cleanup
 837                  * that normally iwl_mvm_mac_restart_complete() below
 838                  * would do.
 839                  */
 840                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 841                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 842         }
 843
 844         return ret;
 845 }
 846
 847 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 848 {
 849         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 850         int ret;
 851
 852         mutex_lock(&mvm->mutex);
 853         ret = __iwl_mvm_mac_start(mvm);
 854         mutex_unlock(&mvm->mutex);
 855
 856         return ret;
 857 }
 858
 859 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 860 {
 861         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 862         int ret;
 863
 864         mutex_lock(&mvm->mutex);
 865
 866         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 867         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 868         ret = iwl_mvm_update_quotas(mvm, NULL);
 869         if (ret)
 870                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 871                         ret);
 872
 873         /* allow transport/FW low power modes */
 874         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 875
 876         mutex_unlock(&mvm->mutex);
 877 }
 878
 879 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 880 {
 881         lockdep_assert_held(&mvm->mutex);
 882
 883         /* disallow low power states when the FW is down */
 884         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 885
 886         /* async_handlers_wk is now blocked */
 887
 888         /*
 889          * The work item could be running or queued if the
 890          * ROC time event stops just as we get here.
 891          */
 892         cancel_work_sync(&mvm->roc_done_wk);
 893
 894         iwl_trans_stop_device(mvm->trans);
 895
 896         iwl_mvm_async_handlers_purge(mvm);
 897         /* async_handlers_list is empty and will stay empty: HW is stopped */
 898
 899         /* the fw is stopped, the aux sta is dead: clean up driver state */
 900         iwl_mvm_del_aux_sta(mvm);
 901
 902         mvm->ucode_loaded = false;
 903 }
 904
 905 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 906 {
 907         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 908
 909         flush_work(&mvm->d0i3_exit_work);
 910         flush_work(&mvm->async_handlers_wk);
 911         flush_work(&mvm->fw_error_dump_wk);
 912
 913         mutex_lock(&mvm->mutex);
 914         __iwl_mvm_mac_stop(mvm);
 915         mutex_unlock(&mvm->mutex);
 916
 917         /*
 918          * The worker might have been waiting for the mutex, let it run and
 919          * discover that its list is now empty.
 920          */
 921         cancel_work_sync(&mvm->async_handlers_wk);
 922 }
 923
 924 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 925 {
 926         u16 i;
 927
 928         lockdep_assert_held(&mvm->mutex);
 929
 930         for (i = 0; i < NUM_PHY_CTX; i++)
 931                 if (!mvm->phy_ctxts[i].ref)
 932                         return &mvm->phy_ctxts[i];
 933
 934         IWL_ERR(mvm, "No available PHY context\n");
 935         return NULL;
 936 }
 937
 938 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 939                                 s8 tx_power)
 940 {
 941         /* FW is in charge of regulatory enforcement */
 942         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 943                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 944                 .pwr_restriction = cpu_to_le16(tx_power),
 945         };
 946
 947         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 948                                     sizeof(reduce_txpwr_cmd),
 949                                     &reduce_txpwr_cmd);
 950 }
 951
 952 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 953                                      struct ieee80211_vif *vif)
 954 {
 955         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 956         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 957         int ret;
 958
 959         /*
 960          * make sure D0i3 exit is completed, otherwise a target access
 961          * during tx queue configuration could be done when still in
 962          * D0i3 state.
 963          */
 964         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 965         if (ret)
 966                 return ret;
 967
 968         /*
 969          * Not much to do here. The stack will not allow interface
 970          * types or combinations that we didn't advertise, so we
 971          * don't really have to check the types.
 972          */
 973
 974         mutex_lock(&mvm->mutex);
 975
 976         /* Allocate resources for the MAC context, and add it to the fw  */
 977         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 978         if (ret)
 979                 goto out_unlock;
 980
 981         /* Counting number of interfaces is needed for legacy PM */
 982         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 983                 mvm->vif_count++;
 984
 985         /*
 986          * The AP binding flow can be done only after the beacon
 987          * template is configured (which happens only in the mac80211
 988          * start_ap() flow), and adding the broadcast station can happen
 989          * only after the binding.
 990          * In addition, since modifying the MAC before adding a bcast
 991          * station is not allowed by the FW, delay the adding of MAC context to
 992          * the point where we can also add the bcast station.
 993          * In short: there's not much we can do at this point, other than
 994          * allocating resources :)
 995          */
 996         if (vif->type == NL80211_IFTYPE_AP ||
 997             vif->type == NL80211_IFTYPE_ADHOC) {
 998                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
 999                 if (ret) {
1000                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1001                         goto out_release;
1002                 }
1003
1004                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1005                 goto out_unlock;
1006         }
1007
1008         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1009         if (ret)
1010                 goto out_release;
1011
1012         ret = iwl_mvm_power_update_mac(mvm);
1013         if (ret)
1014                 goto out_release;
1015
1016         /* beacon filtering */
1017         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1018         if (ret)
1019                 goto out_remove_mac;
1020
1021         if (!mvm->bf_allowed_vif &&
1022             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1023                 mvm->bf_allowed_vif = mvmvif;
1024                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1025                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1026         }
1027
1028         /*
1029          * P2P_DEVICE interface does not have a channel context assigned to it,
1030          * so a dedicated PHY context is allocated to it and the corresponding
1031          * MAC context is bound to it at this stage.
1032          */
1033         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1034
1035                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1036                 if (!mvmvif->phy_ctxt) {
1037                         ret = -ENOSPC;
1038                         goto out_free_bf;
1039                 }
1040
1041                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1042                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1043                 if (ret)
1044                         goto out_unref_phy;
1045
1046                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1047                 if (ret)
1048                         goto out_unbind;
1049
1050                 /* Save a pointer to p2p device vif, so it can later be used to
1051                  * update the p2p device MAC when a GO is started/stopped */
1052                 mvm->p2p_device_vif = vif;
1053         }
1054
1055         iwl_mvm_vif_dbgfs_register(mvm, vif);
1056         goto out_unlock;
1057
1058  out_unbind:
1059         iwl_mvm_binding_remove_vif(mvm, vif);
1060  out_unref_phy:
1061         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1062  out_free_bf:
1063         if (mvm->bf_allowed_vif == mvmvif) {
1064                 mvm->bf_allowed_vif = NULL;
1065                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1066                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1067         }
1068  out_remove_mac:
1069         mvmvif->phy_ctxt = NULL;
1070         iwl_mvm_mac_ctxt_remove(mvm, vif);
1071  out_release:
1072         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1073                 mvm->vif_count--;
1074
1075         iwl_mvm_mac_ctxt_release(mvm, vif);
1076  out_unlock:
1077         mutex_unlock(&mvm->mutex);
1078
1079         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1080
1081         return ret;
1082 }
1083
1084 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1085                                         struct ieee80211_vif *vif)
1086 {
1087         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1088
1089         if (tfd_msk) {
1090                 mutex_lock(&mvm->mutex);
1091                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1092                 mutex_unlock(&mvm->mutex);
1093         }
1094
1095         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1096                 /*
1097                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1098                  * We assume here that all the packets sent to the OFFCHANNEL
1099                  * queue are sent in ROC session.
1100                  */
1101                 flush_work(&mvm->roc_done_wk);
1102         } else {
1103                 /*
1104                  * By now, all the AC queues are empty. The AGG queues are
1105                  * empty too. We already got all the Tx responses for all the
1106                  * packets in the queues. The drain work can have been
1107                  * triggered. Flush it.
1108                  */
1109                 flush_work(&mvm->sta_drained_wk);
1110         }
1111 }
1112
1113 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1114                                          struct ieee80211_vif *vif)
1115 {
1116         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1117         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1118
1119         iwl_mvm_prepare_mac_removal(mvm, vif);
1120
1121         mutex_lock(&mvm->mutex);
1122
1123         if (mvm->bf_allowed_vif == mvmvif) {
1124                 mvm->bf_allowed_vif = NULL;
1125                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1126                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1127         }
1128
1129         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1130
1131         /*
1132          * For AP/GO interface, the tear down of the resources allocated to the
1133          * interface is be handled as part of the stop_ap flow.
1134          */
1135         if (vif->type == NL80211_IFTYPE_AP ||
1136             vif->type == NL80211_IFTYPE_ADHOC) {
1137 #ifdef CONFIG_NL80211_TESTMODE
1138                 if (vif == mvm->noa_vif) {
1139                         mvm->noa_vif = NULL;
1140                         mvm->noa_duration = 0;
1141                 }
1142 #endif
1143                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1144                 goto out_release;
1145         }
1146
1147         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1148                 mvm->p2p_device_vif = NULL;
1149                 iwl_mvm_rm_bcast_sta(mvm, vif);
1150                 iwl_mvm_binding_remove_vif(mvm, vif);
1151                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1152                 mvmvif->phy_ctxt = NULL;
1153         }
1154
1155         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1156                 mvm->vif_count--;
1157
1158         iwl_mvm_power_update_mac(mvm);
1159         iwl_mvm_mac_ctxt_remove(mvm, vif);
1160
1161 out_release:
1162         iwl_mvm_mac_ctxt_release(mvm, vif);
1163         mutex_unlock(&mvm->mutex);
1164 }
1165
1166 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1167 {
1168         return 0;
1169 }
1170
1171 struct iwl_mvm_mc_iter_data {
1172         struct iwl_mvm *mvm;
1173         int port_id;
1174 };
1175
1176 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1177                                       struct ieee80211_vif *vif)
1178 {
1179         struct iwl_mvm_mc_iter_data *data = _data;
1180         struct iwl_mvm *mvm = data->mvm;
1181         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1182         int ret, len;
1183
1184         /* if we don't have free ports, mcast frames will be dropped */
1185         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1186                 return;
1187
1188         if (vif->type != NL80211_IFTYPE_STATION ||
1189             !vif->bss_conf.assoc)
1190                 return;
1191
1192         cmd->port_id = data->port_id++;
1193         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1194         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1195
1196         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1197         if (ret)
1198                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1199 }
1200
1201 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1202 {
1203         struct iwl_mvm_mc_iter_data iter_data = {
1204                 .mvm = mvm,
1205         };
1206
1207         lockdep_assert_held(&mvm->mutex);
1208
1209         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1210                 return;
1211
1212         ieee80211_iterate_active_interfaces_atomic(
1213                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1214                 iwl_mvm_mc_iface_iterator, &iter_data);
1215 }
1216
1217 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1218                                      struct netdev_hw_addr_list *mc_list)
1219 {
1220         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1221         struct iwl_mcast_filter_cmd *cmd;
1222         struct netdev_hw_addr *addr;
1223         int addr_count;
1224         bool pass_all;
1225         int len;
1226
1227         addr_count = netdev_hw_addr_list_count(mc_list);
1228         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1229                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1230         if (pass_all)
1231                 addr_count = 0;
1232
1233         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1234         cmd = kzalloc(len, GFP_ATOMIC);
1235         if (!cmd)
1236                 return 0;
1237
1238         if (pass_all) {
1239                 cmd->pass_all = 1;
1240                 return (u64)(unsigned long)cmd;
1241         }
1242
1243         netdev_hw_addr_list_for_each(addr, mc_list) {
1244                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1245                                    cmd->count, addr->addr);
1246                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1247                        addr->addr, ETH_ALEN);
1248                 cmd->count++;
1249         }
1250
1251         return (u64)(unsigned long)cmd;
1252 }
1253
1254 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1255                                      unsigned int changed_flags,
1256                                      unsigned int *total_flags,
1257                                      u64 multicast)
1258 {
1259         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1260         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1261
1262         mutex_lock(&mvm->mutex);
1263
1264         /* replace previous configuration */
1265         kfree(mvm->mcast_filter_cmd);
1266         mvm->mcast_filter_cmd = cmd;
1267
1268         if (!cmd)
1269                 goto out;
1270
1271         iwl_mvm_recalc_multicast(mvm);
1272 out:
1273         mutex_unlock(&mvm->mutex);
1274         *total_flags = 0;
1275 }
1276
1277 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1278 struct iwl_bcast_iter_data {
1279         struct iwl_mvm *mvm;
1280         struct iwl_bcast_filter_cmd *cmd;
1281         u8 current_filter;
1282 };
1283
1284 static void
1285 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1286                          const struct iwl_fw_bcast_filter *in_filter,
1287                          struct iwl_fw_bcast_filter *out_filter)
1288 {
1289         struct iwl_fw_bcast_filter_attr *attr;
1290         int i;
1291
1292         memcpy(out_filter, in_filter, sizeof(*out_filter));
1293
1294         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1295                 attr = &out_filter->attrs[i];
1296
1297                 if (!attr->mask)
1298                         break;
1299
1300                 switch (attr->reserved1) {
1301                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1302                         if (vif->bss_conf.arp_addr_cnt != 1) {
1303                                 attr->mask = 0;
1304                                 continue;
1305                         }
1306
1307                         attr->val = vif->bss_conf.arp_addr_list[0];
1308                         break;
1309                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1310                         attr->val = *(__be32 *)&vif->addr[2];
1311                         break;
1312                 default:
1313                         break;
1314                 }
1315                 attr->reserved1 = 0;
1316                 out_filter->num_attrs++;
1317         }
1318 }
1319
1320 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1321                                           struct ieee80211_vif *vif)
1322 {
1323         struct iwl_bcast_iter_data *data = _data;
1324         struct iwl_mvm *mvm = data->mvm;
1325         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1326         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1327         struct iwl_fw_bcast_mac *bcast_mac;
1328         int i;
1329
1330         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1331                 return;
1332
1333         bcast_mac = &cmd->macs[mvmvif->id];
1334
1335         /*
1336          * enable filtering only for associated stations, but not for P2P
1337          * Clients
1338          */
1339         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1340             !vif->bss_conf.assoc)
1341                 return;
1342
1343         bcast_mac->default_discard = 1;
1344
1345         /* copy all configured filters */
1346         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1347                 /*
1348                  * Make sure we don't exceed our filters limit.
1349                  * if there is still a valid filter to be configured,
1350                  * be on the safe side and just allow bcast for this mac.
1351                  */
1352                 if (WARN_ON_ONCE(data->current_filter >=
1353                                  ARRAY_SIZE(cmd->filters))) {
1354                         bcast_mac->default_discard = 0;
1355                         bcast_mac->attached_filters = 0;
1356                         break;
1357                 }
1358
1359                 iwl_mvm_set_bcast_filter(vif,
1360                                          &mvm->bcast_filters[i],
1361                                          &cmd->filters[data->current_filter]);
1362
1363                 /* skip current filter if it contains no attributes */
1364                 if (!cmd->filters[data->current_filter].num_attrs)
1365                         continue;
1366
1367                 /* attach the filter to current mac */
1368                 bcast_mac->attached_filters |=
1369                                 cpu_to_le16(BIT(data->current_filter));
1370
1371                 data->current_filter++;
1372         }
1373 }
1374
1375 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1376                                     struct iwl_bcast_filter_cmd *cmd)
1377 {
1378         struct iwl_bcast_iter_data iter_data = {
1379                 .mvm = mvm,
1380                 .cmd = cmd,
1381         };
1382
1383         memset(cmd, 0, sizeof(*cmd));
1384         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1385         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1386
1387 #ifdef CONFIG_IWLWIFI_DEBUGFS
1388         /* use debugfs filters/macs if override is configured */
1389         if (mvm->dbgfs_bcast_filtering.override) {
1390                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1391                        sizeof(cmd->filters));
1392                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1393                        sizeof(cmd->macs));
1394                 return true;
1395         }
1396 #endif
1397
1398         /* if no filters are configured, do nothing */
1399         if (!mvm->bcast_filters)
1400                 return false;
1401
1402         /* configure and attach these filters for each associated sta vif */
1403         ieee80211_iterate_active_interfaces(
1404                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1405                 iwl_mvm_bcast_filter_iterator, &iter_data);
1406
1407         return true;
1408 }
1409 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1410                                           struct ieee80211_vif *vif)
1411 {
1412         struct iwl_bcast_filter_cmd cmd;
1413
1414         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1415                 return 0;
1416
1417         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1418                 return 0;
1419
1420         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1421                                     sizeof(cmd), &cmd);
1422 }
1423 #else
1424 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1425                                                  struct ieee80211_vif *vif)
1426 {
1427         return 0;
1428 }
1429 #endif
1430
1431 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1432                                              struct ieee80211_vif *vif,
1433                                              struct ieee80211_bss_conf *bss_conf,
1434                                              u32 changes)
1435 {
1436         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1437         int ret;
1438
1439         /*
1440          * Re-calculate the tsf id, as the master-slave relations depend on the
1441          * beacon interval, which was not known when the station interface was
1442          * added.
1443          */
1444         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1445                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1446
1447         /*
1448          * If we're not associated yet, take the (new) BSSID before associating
1449          * so the firmware knows. If we're already associated, then use the old
1450          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1451          * branch for disassociation below.
1452          */
1453         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1454                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1455
1456         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1457         if (ret)
1458                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1459
1460         /* after sending it once, adopt mac80211 data */
1461         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1462         mvmvif->associated = bss_conf->assoc;
1463
1464         if (changes & BSS_CHANGED_ASSOC) {
1465                 if (bss_conf->assoc) {
1466                         /* add quota for this interface */
1467                         ret = iwl_mvm_update_quotas(mvm, NULL);
1468                         if (ret) {
1469                                 IWL_ERR(mvm, "failed to update quotas\n");
1470                                 return;
1471                         }
1472
1473                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1474                                      &mvm->status)) {
1475                                 /*
1476                                  * If we're restarting then the firmware will
1477                                  * obviously have lost synchronisation with
1478                                  * the AP. It will attempt to synchronise by
1479                                  * itself, but we can make it more reliable by
1480                                  * scheduling a session protection time event.
1481                                  *
1482                                  * The firmware needs to receive a beacon to
1483                                  * catch up with synchronisation, use 110% of
1484                                  * the beacon interval.
1485                                  *
1486                                  * Set a large maximum delay to allow for more
1487                                  * than a single interface.
1488                                  */
1489                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1490                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1491                                                         5 * dur, false);
1492                         }
1493
1494                         iwl_mvm_sf_update(mvm, vif, false);
1495                         iwl_mvm_power_vif_assoc(mvm, vif);
1496                         if (vif->p2p) {
1497                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1498                                 iwl_mvm_update_smps(mvm, vif,
1499                                                     IWL_MVM_SMPS_REQ_PROT,
1500                                                     IEEE80211_SMPS_DYNAMIC);
1501                         }
1502                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1503                         /*
1504                          * If update fails - SF might be running in associated
1505                          * mode while disassociated - which is forbidden.
1506                          */
1507                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1508                                   "Failed to update SF upon disassociation\n");
1509
1510                         /* remove AP station now that the MAC is unassoc */
1511                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1512                         if (ret)
1513                                 IWL_ERR(mvm, "failed to remove AP station\n");
1514
1515                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1516                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1517                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1518                         /* remove quota for this interface */
1519                         ret = iwl_mvm_update_quotas(mvm, NULL);
1520                         if (ret)
1521                                 IWL_ERR(mvm, "failed to update quotas\n");
1522
1523                         if (vif->p2p)
1524                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1525
1526                         /* this will take the cleared BSSID from bss_conf */
1527                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1528                         if (ret)
1529                                 IWL_ERR(mvm,
1530                                         "failed to update MAC %pM (clear after unassoc)\n",
1531                                         vif->addr);
1532                 }
1533
1534                 iwl_mvm_recalc_multicast(mvm);
1535                 iwl_mvm_configure_bcast_filter(mvm, vif);
1536
1537                 /* reset rssi values */
1538                 mvmvif->bf_data.ave_beacon_signal = 0;
1539
1540                 iwl_mvm_bt_coex_vif_change(mvm);
1541                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1542                                     IEEE80211_SMPS_AUTOMATIC);
1543         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1544                 /*
1545                  * We received a beacon _after_ association so
1546                  * remove the session protection.
1547                  */
1548                 iwl_mvm_remove_time_event(mvm, mvmvif,
1549                                           &mvmvif->time_event_data);
1550         }
1551
1552         if (changes & BSS_CHANGED_BEACON_INFO) {
1553                 iwl_mvm_sf_update(mvm, vif, false);
1554                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1555         }
1556
1557         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1558                 ret = iwl_mvm_power_update_mac(mvm);
1559                 if (ret)
1560                         IWL_ERR(mvm, "failed to update power mode\n");
1561         }
1562
1563         if (changes & BSS_CHANGED_TXPOWER) {
1564                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1565                                 bss_conf->txpower);
1566                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1567         }
1568
1569         if (changes & BSS_CHANGED_CQM) {
1570                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1571                 /* reset cqm events tracking */
1572                 mvmvif->bf_data.last_cqm_event = 0;
1573                 if (mvmvif->bf_data.bf_enabled) {
1574                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1575                         if (ret)
1576                                 IWL_ERR(mvm,
1577                                         "failed to update CQM thresholds\n");
1578                 }
1579         }
1580
1581         if (changes & BSS_CHANGED_ARP_FILTER) {
1582                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1583                 iwl_mvm_configure_bcast_filter(mvm, vif);
1584         }
1585 }
1586
1587 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1588                                  struct ieee80211_vif *vif)
1589 {
1590         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1591         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1592         int ret;
1593
1594         /*
1595          * iwl_mvm_mac_ctxt_add() might read directly from the device
1596          * (the system time), so make sure it is available.
1597          */
1598         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1599         if (ret)
1600                 return ret;
1601
1602         mutex_lock(&mvm->mutex);
1603
1604         /* Send the beacon template */
1605         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1606         if (ret)
1607                 goto out_unlock;
1608
1609         /*
1610          * Re-calculate the tsf id, as the master-slave relations depend on the
1611          * beacon interval, which was not known when the AP interface was added.
1612          */
1613         if (vif->type == NL80211_IFTYPE_AP)
1614                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1615
1616         /* Add the mac context */
1617         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1618         if (ret)
1619                 goto out_unlock;
1620
1621         /* Perform the binding */
1622         ret = iwl_mvm_binding_add_vif(mvm, vif);
1623         if (ret)
1624                 goto out_remove;
1625
1626         /* Send the bcast station. At this stage the TBTT and DTIM time events
1627          * are added and applied to the scheduler */
1628         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1629         if (ret)
1630                 goto out_unbind;
1631
1632         /* must be set before quota calculations */
1633         mvmvif->ap_ibss_active = true;
1634
1635         /* power updated needs to be done before quotas */
1636         iwl_mvm_power_update_mac(mvm);
1637
1638         ret = iwl_mvm_update_quotas(mvm, NULL);
1639         if (ret)
1640                 goto out_quota_failed;
1641
1642         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1643         if (vif->p2p && mvm->p2p_device_vif)
1644                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1645
1646         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1647
1648         iwl_mvm_bt_coex_vif_change(mvm);
1649
1650         /* we don't support TDLS during DCM */
1651         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1652                 iwl_mvm_teardown_tdls_peers(mvm);
1653
1654         mutex_unlock(&mvm->mutex);
1655         return 0;
1656
1657 out_quota_failed:
1658         iwl_mvm_power_update_mac(mvm);
1659         mvmvif->ap_ibss_active = false;
1660         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1661 out_unbind:
1662         iwl_mvm_binding_remove_vif(mvm, vif);
1663 out_remove:
1664         iwl_mvm_mac_ctxt_remove(mvm, vif);
1665 out_unlock:
1666         mutex_unlock(&mvm->mutex);
1667         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1668         return ret;
1669 }
1670
1671 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1672                                  struct ieee80211_vif *vif)
1673 {
1674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1675         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1676
1677         iwl_mvm_prepare_mac_removal(mvm, vif);
1678
1679         mutex_lock(&mvm->mutex);
1680
1681         /* Handle AP stop while in CSA */
1682         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1683                 iwl_mvm_remove_time_event(mvm, mvmvif,
1684                                           &mvmvif->time_event_data);
1685                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1686         }
1687
1688         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1689                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1690                 mvm->csa_tx_block_bcn_timeout = 0;
1691         }
1692
1693         mvmvif->ap_ibss_active = false;
1694         mvm->ap_last_beacon_gp2 = 0;
1695
1696         iwl_mvm_bt_coex_vif_change(mvm);
1697
1698         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1699
1700         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1701         if (vif->p2p && mvm->p2p_device_vif)
1702                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1703
1704         iwl_mvm_update_quotas(mvm, NULL);
1705         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1706         iwl_mvm_binding_remove_vif(mvm, vif);
1707
1708         iwl_mvm_power_update_mac(mvm);
1709
1710         iwl_mvm_mac_ctxt_remove(mvm, vif);
1711
1712         mutex_unlock(&mvm->mutex);
1713 }
1714
1715 static void
1716 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1717                                  struct ieee80211_vif *vif,
1718                                  struct ieee80211_bss_conf *bss_conf,
1719                                  u32 changes)
1720 {
1721         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1722
1723         /* Changes will be applied when the AP/IBSS is started */
1724         if (!mvmvif->ap_ibss_active)
1725                 return;
1726
1727         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1728                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1729             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1730                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1731
1732         /* Need to send a new beacon template to the FW */
1733         if (changes & BSS_CHANGED_BEACON &&
1734             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1735                 IWL_WARN(mvm, "Failed updating beacon data\n");
1736 }
1737
1738 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1739                                      struct ieee80211_vif *vif,
1740                                      struct ieee80211_bss_conf *bss_conf,
1741                                      u32 changes)
1742 {
1743         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1744
1745         /*
1746          * iwl_mvm_bss_info_changed_station() might call
1747          * iwl_mvm_protect_session(), which reads directly from
1748          * the device (the system time), so make sure it is available.
1749          */
1750         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1751                 return;
1752
1753         mutex_lock(&mvm->mutex);
1754
1755         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1756                 iwl_mvm_scan_offload_stop(mvm, true);
1757
1758         switch (vif->type) {
1759         case NL80211_IFTYPE_STATION:
1760                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1761                 break;
1762         case NL80211_IFTYPE_AP:
1763         case NL80211_IFTYPE_ADHOC:
1764                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1765                 break;
1766         default:
1767                 /* shouldn't happen */
1768                 WARN_ON_ONCE(1);
1769         }
1770
1771         mutex_unlock(&mvm->mutex);
1772         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1773 }
1774
1775 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1776                                           enum iwl_scan_status scan_type)
1777 {
1778         int ret;
1779         bool wait_for_handlers = false;
1780
1781         mutex_lock(&mvm->mutex);
1782
1783         if (mvm->scan_status != scan_type) {
1784                 ret = 0;
1785                 /* make sure there are no pending notifications */
1786                 wait_for_handlers = true;
1787                 goto out;
1788         }
1789
1790         switch (scan_type) {
1791         case IWL_MVM_SCAN_SCHED:
1792                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1793                 break;
1794         case IWL_MVM_SCAN_OS:
1795                 ret = iwl_mvm_cancel_scan(mvm);
1796                 break;
1797         case IWL_MVM_SCAN_NONE:
1798         default:
1799                 WARN_ON_ONCE(1);
1800                 ret = -EINVAL;
1801                 break;
1802         }
1803         if (ret)
1804                 goto out;
1805
1806         wait_for_handlers = true;
1807 out:
1808         mutex_unlock(&mvm->mutex);
1809
1810         /* make sure we consume the completion notification */
1811         if (wait_for_handlers)
1812                 iwl_mvm_wait_for_async_handlers(mvm);
1813
1814         return ret;
1815 }
1816 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1817                                struct ieee80211_vif *vif,
1818                                struct ieee80211_scan_request *hw_req)
1819 {
1820         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1821         struct cfg80211_scan_request *req = &hw_req->req;
1822         int ret;
1823
1824         if (req->n_channels == 0 ||
1825             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1826                 return -EINVAL;
1827
1828         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1829         if (ret)
1830                 return ret;
1831
1832         mutex_lock(&mvm->mutex);
1833
1834         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1835                 ret = -EBUSY;
1836                 goto out;
1837         }
1838
1839         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1840
1841         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1842                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1843         else
1844                 ret = iwl_mvm_scan_request(mvm, vif, req);
1845
1846         if (ret)
1847                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1848 out:
1849         mutex_unlock(&mvm->mutex);
1850         return ret;
1851 }
1852
1853 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1854                                        struct ieee80211_vif *vif)
1855 {
1856         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1857
1858         mutex_lock(&mvm->mutex);
1859
1860         iwl_mvm_cancel_scan(mvm);
1861
1862         mutex_unlock(&mvm->mutex);
1863 }
1864
1865 static void
1866 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1867                                   struct ieee80211_sta *sta, u16 tids,
1868                                   int num_frames,
1869                                   enum ieee80211_frame_release_type reason,
1870                                   bool more_data)
1871 {
1872         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1873
1874         /* Called when we need to transmit (a) frame(s) from mac80211 */
1875
1876         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1877                                           tids, more_data, false);
1878 }
1879
1880 static void
1881 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1882                                     struct ieee80211_sta *sta, u16 tids,
1883                                     int num_frames,
1884                                     enum ieee80211_frame_release_type reason,
1885                                     bool more_data)
1886 {
1887         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1888
1889         /* Called when we need to transmit (a) frame(s) from agg queue */
1890
1891         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1892                                           tids, more_data, true);
1893 }
1894
1895 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1896                                    struct ieee80211_vif *vif,
1897                                    enum sta_notify_cmd cmd,
1898                                    struct ieee80211_sta *sta)
1899 {
1900         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1901         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1902         int tid;
1903
1904         switch (cmd) {
1905         case STA_NOTIFY_SLEEP:
1906                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1907                         ieee80211_sta_block_awake(hw, sta, true);
1908                 spin_lock_bh(&mvmsta->lock);
1909                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1910                         struct iwl_mvm_tid_data *tid_data;
1911
1912                         tid_data = &mvmsta->tid_data[tid];
1913                         if (tid_data->state != IWL_AGG_ON &&
1914                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1915                                 continue;
1916                         if (iwl_mvm_tid_queued(tid_data) == 0)
1917                                 continue;
1918                         ieee80211_sta_set_buffered(sta, tid, true);
1919                 }
1920                 spin_unlock_bh(&mvmsta->lock);
1921                 /*
1922                  * The fw updates the STA to be asleep. Tx packets on the Tx
1923                  * queues to this station will not be transmitted. The fw will
1924                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1925                  */
1926                 break;
1927         case STA_NOTIFY_AWAKE:
1928                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1929                         break;
1930                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1931                 break;
1932         default:
1933                 break;
1934         }
1935 }
1936
1937 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1938                                        struct ieee80211_vif *vif,
1939                                        struct ieee80211_sta *sta)
1940 {
1941         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1942         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1943
1944         /*
1945          * This is called before mac80211 does RCU synchronisation,
1946          * so here we already invalidate our internal RCU-protected
1947          * station pointer. The rest of the code will thus no longer
1948          * be able to find the station this way, and we don't rely
1949          * on further RCU synchronisation after the sta_state()
1950          * callback deleted the station.
1951          */
1952         mutex_lock(&mvm->mutex);
1953         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1954                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1955                                    ERR_PTR(-ENOENT));
1956         mutex_unlock(&mvm->mutex);
1957 }
1958
1959 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1960                                  struct ieee80211_vif *vif,
1961                                  struct ieee80211_sta *sta,
1962                                  enum ieee80211_sta_state old_state,
1963                                  enum ieee80211_sta_state new_state)
1964 {
1965         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1966         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1967         int ret;
1968
1969         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1970                            sta->addr, old_state, new_state);
1971
1972         /* this would be a mac80211 bug ... but don't crash */
1973         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1974                 return -EINVAL;
1975
1976         /* if a STA is being removed, reuse its ID */
1977         flush_work(&mvm->sta_drained_wk);
1978
1979         mutex_lock(&mvm->mutex);
1980         if (old_state == IEEE80211_STA_NOTEXIST &&
1981             new_state == IEEE80211_STA_NONE) {
1982                 /*
1983                  * Firmware bug - it'll crash if the beacon interval is less
1984                  * than 16. We can't avoid connecting at all, so refuse the
1985                  * station state change, this will cause mac80211 to abandon
1986                  * attempts to connect to this AP, and eventually wpa_s will
1987                  * blacklist the AP...
1988                  */
1989                 if (vif->type == NL80211_IFTYPE_STATION &&
1990                     vif->bss_conf.beacon_int < 16) {
1991                         IWL_ERR(mvm,
1992                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1993                                 sta->addr, vif->bss_conf.beacon_int);
1994                         ret = -EINVAL;
1995                         goto out_unlock;
1996                 }
1997
1998                 if (sta->tdls &&
1999                     (vif->p2p ||
2000                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2001                                                 IWL_MVM_TDLS_STA_COUNT ||
2002                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2003                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2004                         ret = -EBUSY;
2005                         goto out_unlock;
2006                 }
2007
2008                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2009                 if (sta->tdls && ret == 0)
2010                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2011         } else if (old_state == IEEE80211_STA_NONE &&
2012                    new_state == IEEE80211_STA_AUTH) {
2013                 /*
2014                  * EBS may be disabled due to previous failures reported by FW.
2015                  * Reset EBS status here assuming environment has been changed.
2016                  */
2017                 mvm->last_ebs_successful = true;
2018                 ret = 0;
2019         } else if (old_state == IEEE80211_STA_AUTH &&
2020                    new_state == IEEE80211_STA_ASSOC) {
2021                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2022                 if (ret == 0)
2023                         iwl_mvm_rs_rate_init(mvm, sta,
2024                                              mvmvif->phy_ctxt->channel->band,
2025                                              true);
2026         } else if (old_state == IEEE80211_STA_ASSOC &&
2027                    new_state == IEEE80211_STA_AUTHORIZED) {
2028
2029                 /* we don't support TDLS during DCM */
2030                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2031                         iwl_mvm_teardown_tdls_peers(mvm);
2032
2033                 /* enable beacon filtering */
2034                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2035                 ret = 0;
2036         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2037                    new_state == IEEE80211_STA_ASSOC) {
2038                 /* disable beacon filtering */
2039                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2040                 ret = 0;
2041         } else if (old_state == IEEE80211_STA_ASSOC &&
2042                    new_state == IEEE80211_STA_AUTH) {
2043                 ret = 0;
2044         } else if (old_state == IEEE80211_STA_AUTH &&
2045                    new_state == IEEE80211_STA_NONE) {
2046                 ret = 0;
2047         } else if (old_state == IEEE80211_STA_NONE &&
2048                    new_state == IEEE80211_STA_NOTEXIST) {
2049                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2050                 if (sta->tdls)
2051                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2052         } else {
2053                 ret = -EIO;
2054         }
2055  out_unlock:
2056         mutex_unlock(&mvm->mutex);
2057
2058         return ret;
2059 }
2060
2061 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2062 {
2063         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2064
2065         mvm->rts_threshold = value;
2066
2067         return 0;
2068 }
2069
2070 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2071                                   struct ieee80211_vif *vif,
2072                                   struct ieee80211_sta *sta, u32 changed)
2073 {
2074         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2075
2076         if (vif->type == NL80211_IFTYPE_STATION &&
2077             changed & IEEE80211_RC_NSS_CHANGED)
2078                 iwl_mvm_sf_update(mvm, vif, false);
2079 }
2080
2081 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2082                                struct ieee80211_vif *vif, u16 ac,
2083                                const struct ieee80211_tx_queue_params *params)
2084 {
2085         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2086         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2087
2088         mvmvif->queue_params[ac] = *params;
2089
2090         /*
2091          * No need to update right away, we'll get BSS_CHANGED_QOS
2092          * The exception is P2P_DEVICE interface which needs immediate update.
2093          */
2094         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2095                 int ret;
2096
2097                 mutex_lock(&mvm->mutex);
2098                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2099                 mutex_unlock(&mvm->mutex);
2100                 return ret;
2101         }
2102         return 0;
2103 }
2104
2105 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2106                                       struct ieee80211_vif *vif)
2107 {
2108         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2109         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2110                            200 + vif->bss_conf.beacon_int);
2111         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2112                                100 + vif->bss_conf.beacon_int);
2113
2114         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2115                 return;
2116
2117         /*
2118          * iwl_mvm_protect_session() reads directly from the device
2119          * (the system time), so make sure it is available.
2120          */
2121         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2122                 return;
2123
2124         mutex_lock(&mvm->mutex);
2125         /* Try really hard to protect the session and hear a beacon */
2126         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2127         mutex_unlock(&mvm->mutex);
2128
2129         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2130 }
2131
2132 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2133                                         struct ieee80211_vif *vif,
2134                                         struct cfg80211_sched_scan_request *req,
2135                                         struct ieee80211_scan_ies *ies)
2136 {
2137         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2138         int ret;
2139
2140         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2141         if (ret)
2142                 return ret;
2143
2144         mutex_lock(&mvm->mutex);
2145
2146         if (!iwl_mvm_is_idle(mvm)) {
2147                 ret = -EBUSY;
2148                 goto out;
2149         }
2150
2151         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2152                 ret = -EBUSY;
2153                 goto out;
2154         }
2155
2156         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2157
2158         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2159                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2160                 if (ret)
2161                         goto err;
2162         }
2163
2164         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2165         if (ret)
2166                 goto err;
2167
2168         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2169                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2170         else
2171                 ret = iwl_mvm_sched_scan_start(mvm, req);
2172
2173         if (!ret)
2174                 goto out;
2175 err:
2176         mvm->scan_status = IWL_MVM_SCAN_NONE;
2177 out:
2178         mutex_unlock(&mvm->mutex);
2179         return ret;
2180 }
2181
2182 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2183                                        struct ieee80211_vif *vif)
2184 {
2185         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2186         int ret;
2187
2188         mutex_lock(&mvm->mutex);
2189         ret = iwl_mvm_scan_offload_stop(mvm, false);
2190         mutex_unlock(&mvm->mutex);
2191         iwl_mvm_wait_for_async_handlers(mvm);
2192
2193         return ret;
2194 }
2195
2196 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2197                                enum set_key_cmd cmd,
2198                                struct ieee80211_vif *vif,
2199                                struct ieee80211_sta *sta,
2200                                struct ieee80211_key_conf *key)
2201 {
2202         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2203         int ret;
2204
2205         if (iwlwifi_mod_params.sw_crypto) {
2206                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2207                 return -EOPNOTSUPP;
2208         }
2209
2210         switch (key->cipher) {
2211         case WLAN_CIPHER_SUITE_TKIP:
2212                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2213                 /* fall-through */
2214         case WLAN_CIPHER_SUITE_CCMP:
2215                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2216                 break;
2217         case WLAN_CIPHER_SUITE_AES_CMAC:
2218                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2219                 break;
2220         case WLAN_CIPHER_SUITE_WEP40:
2221         case WLAN_CIPHER_SUITE_WEP104:
2222                 /*
2223                  * Support for TX only, at least for now, so accept
2224                  * the key and do nothing else. Then mac80211 will
2225                  * pass it for TX but we don't have to use it for RX.
2226                  */
2227                 return 0;
2228         default:
2229                 /* currently FW supports only one optional cipher scheme */
2230                 if (hw->n_cipher_schemes &&
2231                     hw->cipher_schemes->cipher == key->cipher)
2232                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2233                 else
2234                         return -EOPNOTSUPP;
2235         }
2236
2237         mutex_lock(&mvm->mutex);
2238
2239         switch (cmd) {
2240         case SET_KEY:
2241                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2242                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2243                         /*
2244                          * GTK on AP interface is a TX-only key, return 0;
2245                          * on IBSS they're per-station and because we're lazy
2246                          * we don't support them for RX, so do the same.
2247                          */
2248                         ret = 0;
2249                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2250                         break;
2251                 }
2252
2253                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2254                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2255                 if (ret) {
2256                         IWL_WARN(mvm, "set key failed\n");
2257                         /*
2258                          * can't add key for RX, but we don't need it
2259                          * in the device for TX so still return 0
2260                          */
2261                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2262                         ret = 0;
2263                 }
2264
2265                 break;
2266         case DISABLE_KEY:
2267                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2268                         ret = 0;
2269                         break;
2270                 }
2271
2272                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2273                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2274                 break;
2275         default:
2276                 ret = -EINVAL;
2277         }
2278
2279         mutex_unlock(&mvm->mutex);
2280         return ret;
2281 }
2282
2283 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2284                                         struct ieee80211_vif *vif,
2285                                         struct ieee80211_key_conf *keyconf,
2286                                         struct ieee80211_sta *sta,
2287                                         u32 iv32, u16 *phase1key)
2288 {
2289         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2290
2291         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2292                 return;
2293
2294         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2295 }
2296
2297
2298 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2299                                struct iwl_rx_packet *pkt, void *data)
2300 {
2301         struct iwl_mvm *mvm =
2302                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2303         struct iwl_hs20_roc_res *resp;
2304         int resp_len = iwl_rx_packet_payload_len(pkt);
2305         struct iwl_mvm_time_event_data *te_data = data;
2306
2307         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2308                 return true;
2309
2310         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2311                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2312                 return true;
2313         }
2314
2315         resp = (void *)pkt->data;
2316
2317         IWL_DEBUG_TE(mvm,
2318                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2319                      resp->status, resp->event_unique_id);
2320
2321         te_data->uid = le32_to_cpu(resp->event_unique_id);
2322         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2323                      te_data->uid);
2324
2325         spin_lock_bh(&mvm->time_event_lock);
2326         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2327         spin_unlock_bh(&mvm->time_event_lock);
2328
2329         return true;
2330 }
2331
2332 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2333 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2334                                     struct ieee80211_channel *channel,
2335                                     struct ieee80211_vif *vif,
2336                                     int duration)
2337 {
2338         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2339         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2340         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2341         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2342         struct iwl_notification_wait wait_time_event;
2343         struct iwl_hs20_roc_req aux_roc_req = {
2344                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2345                 .id_and_color =
2346                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2347                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2348                 /* Set the channel info data */
2349                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2350                         PHY_BAND_24 : PHY_BAND_5,
2351                 .channel_info.channel = channel->hw_value,
2352                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2353                 /* Set the time and duration */
2354                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2355                 .apply_time_max_delay =
2356                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2357                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2358          };
2359
2360         /* Set the node address */
2361         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2362
2363         te_data->vif = vif;
2364         te_data->duration = duration;
2365         te_data->id = HOT_SPOT_CMD;
2366
2367         lockdep_assert_held(&mvm->mutex);
2368
2369         spin_lock_bh(&mvm->time_event_lock);
2370         list_add_tail(&te_data->list, &mvm->time_event_list);
2371         spin_unlock_bh(&mvm->time_event_lock);
2372
2373         /*
2374          * Use a notification wait, which really just processes the
2375          * command response and doesn't wait for anything, in order
2376          * to be able to process the response and get the UID inside
2377          * the RX path. Using CMD_WANT_SKB doesn't work because it
2378          * stores the buffer and then wakes up this thread, by which
2379          * time another notification (that the time event started)
2380          * might already be processed unsuccessfully.
2381          */
2382         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2383                                    time_event_response,
2384                                    ARRAY_SIZE(time_event_response),
2385                                    iwl_mvm_rx_aux_roc, te_data);
2386
2387         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2388                                    &aux_roc_req);
2389
2390         if (res) {
2391                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2392                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2393                 goto out_clear_te;
2394         }
2395
2396         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2397         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2398         /* should never fail */
2399         WARN_ON_ONCE(res);
2400
2401         if (res) {
2402  out_clear_te:
2403                 spin_lock_bh(&mvm->time_event_lock);
2404                 iwl_mvm_te_clear_data(mvm, te_data);
2405                 spin_unlock_bh(&mvm->time_event_lock);
2406         }
2407
2408         return res;
2409 }
2410
2411 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2412                        struct ieee80211_vif *vif,
2413                        struct ieee80211_channel *channel,
2414                        int duration,
2415                        enum ieee80211_roc_type type)
2416 {
2417         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2418         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2419         struct cfg80211_chan_def chandef;
2420         struct iwl_mvm_phy_ctxt *phy_ctxt;
2421         int ret, i;
2422
2423         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2424                            duration, type);
2425
2426         switch (vif->type) {
2427         case NL80211_IFTYPE_STATION:
2428                 /* Use aux roc framework (HS20) */
2429                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2430                                                vif, duration);
2431                 return ret;
2432         case NL80211_IFTYPE_P2P_DEVICE:
2433                 /* handle below */
2434                 break;
2435         default:
2436                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2437                 return -EINVAL;
2438         }
2439
2440         mutex_lock(&mvm->mutex);
2441
2442         for (i = 0; i < NUM_PHY_CTX; i++) {
2443                 phy_ctxt = &mvm->phy_ctxts[i];
2444                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2445                         continue;
2446
2447                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2448                         /*
2449                          * Unbind the P2P_DEVICE from the current PHY context,
2450                          * and if the PHY context is not used remove it.
2451                          */
2452                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2453                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2454                                 goto out_unlock;
2455
2456                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2457
2458                         /* Bind the P2P_DEVICE to the current PHY Context */
2459                         mvmvif->phy_ctxt = phy_ctxt;
2460
2461                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2462                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2463                                 goto out_unlock;
2464
2465                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2466                         goto schedule_time_event;
2467                 }
2468         }
2469
2470         /* Need to update the PHY context only if the ROC channel changed */
2471         if (channel == mvmvif->phy_ctxt->channel)
2472                 goto schedule_time_event;
2473
2474         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2475
2476         /*
2477          * Change the PHY context configuration as it is currently referenced
2478          * only by the P2P Device MAC
2479          */
2480         if (mvmvif->phy_ctxt->ref == 1) {
2481                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2482                                                &chandef, 1, 1);
2483                 if (ret)
2484                         goto out_unlock;
2485         } else {
2486                 /*
2487                  * The PHY context is shared with other MACs. Need to remove the
2488                  * P2P Device from the binding, allocate an new PHY context and
2489                  * create a new binding
2490                  */
2491                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2492                 if (!phy_ctxt) {
2493                         ret = -ENOSPC;
2494                         goto out_unlock;
2495                 }
2496
2497                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2498                                                1, 1);
2499                 if (ret) {
2500                         IWL_ERR(mvm, "Failed to change PHY context\n");
2501                         goto out_unlock;
2502                 }
2503
2504                 /* Unbind the P2P_DEVICE from the current PHY context */
2505                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2506                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2507                         goto out_unlock;
2508
2509                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2510
2511                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2512                 mvmvif->phy_ctxt = phy_ctxt;
2513
2514                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2515                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2516                         goto out_unlock;
2517
2518                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2519         }
2520
2521 schedule_time_event:
2522         /* Schedule the time events */
2523         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2524
2525 out_unlock:
2526         mutex_unlock(&mvm->mutex);
2527         IWL_DEBUG_MAC80211(mvm, "leave\n");
2528         return ret;
2529 }
2530
2531 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2532 {
2533         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2534
2535         IWL_DEBUG_MAC80211(mvm, "enter\n");
2536
2537         mutex_lock(&mvm->mutex);
2538         iwl_mvm_stop_p2p_roc(mvm);
2539         mutex_unlock(&mvm->mutex);
2540
2541         IWL_DEBUG_MAC80211(mvm, "leave\n");
2542         return 0;
2543 }
2544
2545 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2546                                  struct ieee80211_chanctx_conf *ctx)
2547 {
2548         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2549         struct iwl_mvm_phy_ctxt *phy_ctxt;
2550         int ret;
2551
2552         lockdep_assert_held(&mvm->mutex);
2553
2554         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2555
2556         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2557         if (!phy_ctxt) {
2558                 ret = -ENOSPC;
2559                 goto out;
2560         }
2561
2562         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2563                                        ctx->rx_chains_static,
2564                                        ctx->rx_chains_dynamic);
2565         if (ret) {
2566                 IWL_ERR(mvm, "Failed to add PHY context\n");
2567                 goto out;
2568         }
2569
2570         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2571         *phy_ctxt_id = phy_ctxt->id;
2572 out:
2573         return ret;
2574 }
2575
2576 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2577                                struct ieee80211_chanctx_conf *ctx)
2578 {
2579         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2580         int ret;
2581
2582         mutex_lock(&mvm->mutex);
2583         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2584         mutex_unlock(&mvm->mutex);
2585
2586         return ret;
2587 }
2588
2589 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2590                                      struct ieee80211_chanctx_conf *ctx)
2591 {
2592         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2593         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2594
2595         lockdep_assert_held(&mvm->mutex);
2596
2597         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2598 }
2599
2600 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2601                                    struct ieee80211_chanctx_conf *ctx)
2602 {
2603         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2604
2605         mutex_lock(&mvm->mutex);
2606         __iwl_mvm_remove_chanctx(mvm, ctx);
2607         mutex_unlock(&mvm->mutex);
2608 }
2609
2610 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2611                                    struct ieee80211_chanctx_conf *ctx,
2612                                    u32 changed)
2613 {
2614         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2615         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2616         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2617
2618         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2619                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2620                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2621                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2622                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2623                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2624                       phy_ctxt->ref, changed))
2625                 return;
2626
2627         mutex_lock(&mvm->mutex);
2628         iwl_mvm_bt_coex_vif_change(mvm);
2629         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2630                                  ctx->rx_chains_static,
2631                                  ctx->rx_chains_dynamic);
2632         mutex_unlock(&mvm->mutex);
2633 }
2634
2635 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2636                                         struct ieee80211_vif *vif,
2637                                         struct ieee80211_chanctx_conf *ctx,
2638                                         bool switching_chanctx)
2639 {
2640         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2641         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2642         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2643         int ret;
2644
2645         lockdep_assert_held(&mvm->mutex);
2646
2647         mvmvif->phy_ctxt = phy_ctxt;
2648
2649         switch (vif->type) {
2650         case NL80211_IFTYPE_AP:
2651                 /* Unless it's a CSA flow we have nothing to do here */
2652                 if (vif->csa_active) {
2653                         mvmvif->ap_ibss_active = true;
2654                         break;
2655                 }
2656         case NL80211_IFTYPE_ADHOC:
2657                 /*
2658                  * The AP binding flow is handled as part of the start_ap flow
2659                  * (in bss_info_changed), similarly for IBSS.
2660                  */
2661                 ret = 0;
2662                 goto out;
2663         case NL80211_IFTYPE_STATION:
2664                 break;
2665         case NL80211_IFTYPE_MONITOR:
2666                 /* always disable PS when a monitor interface is active */
2667                 mvmvif->ps_disabled = true;
2668                 break;
2669         default:
2670                 ret = -EINVAL;
2671                 goto out;
2672         }
2673
2674         ret = iwl_mvm_binding_add_vif(mvm, vif);
2675         if (ret)
2676                 goto out;
2677
2678         /*
2679          * Power state must be updated before quotas,
2680          * otherwise fw will complain.
2681          */
2682         iwl_mvm_power_update_mac(mvm);
2683
2684         /* Setting the quota at this stage is only required for monitor
2685          * interfaces. For the other types, the bss_info changed flow
2686          * will handle quota settings.
2687          */
2688         if (vif->type == NL80211_IFTYPE_MONITOR) {
2689                 mvmvif->monitor_active = true;
2690                 ret = iwl_mvm_update_quotas(mvm, NULL);
2691                 if (ret)
2692                         goto out_remove_binding;
2693         }
2694
2695         /* Handle binding during CSA */
2696         if ((vif->type == NL80211_IFTYPE_AP) ||
2697             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2698                 iwl_mvm_update_quotas(mvm, NULL);
2699                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2700         }
2701
2702         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2703                 struct iwl_mvm_sta *mvmsta;
2704
2705                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2706                                                           mvmvif->ap_sta_id);
2707
2708                 if (WARN_ON(!mvmsta))
2709                         goto out;
2710
2711                 /* TODO: only re-enable after the first beacon */
2712                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2713         }
2714
2715         goto out;
2716
2717 out_remove_binding:
2718         iwl_mvm_binding_remove_vif(mvm, vif);
2719         iwl_mvm_power_update_mac(mvm);
2720 out:
2721         if (ret)
2722                 mvmvif->phy_ctxt = NULL;
2723         return ret;
2724 }
2725 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2726                                       struct ieee80211_vif *vif,
2727                                       struct ieee80211_chanctx_conf *ctx)
2728 {
2729         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2730         int ret;
2731
2732         mutex_lock(&mvm->mutex);
2733         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2734         mutex_unlock(&mvm->mutex);
2735
2736         return ret;
2737 }
2738
2739 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2740                                            struct ieee80211_vif *vif,
2741                                            struct ieee80211_chanctx_conf *ctx,
2742                                            bool switching_chanctx)
2743 {
2744         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2745         struct ieee80211_vif *disabled_vif = NULL;
2746         struct iwl_mvm_sta *mvmsta;
2747
2748         lockdep_assert_held(&mvm->mutex);
2749
2750         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2751
2752         switch (vif->type) {
2753         case NL80211_IFTYPE_ADHOC:
2754                 goto out;
2755         case NL80211_IFTYPE_MONITOR:
2756                 mvmvif->monitor_active = false;
2757                 mvmvif->ps_disabled = false;
2758                 break;
2759         case NL80211_IFTYPE_AP:
2760                 /* This part is triggered only during CSA */
2761                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2762                         goto out;
2763
2764                 /* Set CS bit on all the stations */
2765                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2766
2767                 /* Save blocked iface, the timeout is set on the next beacon */
2768                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2769
2770                 mvmvif->ap_ibss_active = false;
2771                 break;
2772         case NL80211_IFTYPE_STATION:
2773                 if (!switching_chanctx)
2774                         break;
2775
2776                 disabled_vif = vif;
2777
2778                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2779                                                           mvmvif->ap_sta_id);
2780
2781                 if (!WARN_ON(!mvmsta))
2782                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2783
2784                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2785                 break;
2786         default:
2787                 break;
2788         }
2789
2790         iwl_mvm_update_quotas(mvm, disabled_vif);
2791         iwl_mvm_binding_remove_vif(mvm, vif);
2792
2793 out:
2794         mvmvif->phy_ctxt = NULL;
2795         iwl_mvm_power_update_mac(mvm);
2796 }
2797
2798 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2799                                          struct ieee80211_vif *vif,
2800                                          struct ieee80211_chanctx_conf *ctx)
2801 {
2802         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2803
2804         mutex_lock(&mvm->mutex);
2805         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2806         mutex_unlock(&mvm->mutex);
2807 }
2808
2809 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2810                                       struct ieee80211_vif_chanctx_switch *vifs,
2811                                       int n_vifs,
2812                                       enum ieee80211_chanctx_switch_mode mode)
2813 {
2814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2815         int ret;
2816
2817         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2818         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2819                 return -EOPNOTSUPP;
2820
2821         mutex_lock(&mvm->mutex);
2822         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2823         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2824
2825         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2826         if (ret) {
2827                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2828                 goto out_reassign;
2829         }
2830
2831         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2832                                            true);
2833         if (ret) {
2834                 IWL_ERR(mvm,
2835                         "failed to assign new_ctx during channel switch\n");
2836                 goto out_remove;
2837         }
2838
2839         /* we don't support TDLS during DCM - can be caused by channel switch */
2840         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2841                 iwl_mvm_teardown_tdls_peers(mvm);
2842
2843         goto out;
2844
2845 out_remove:
2846         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2847
2848 out_reassign:
2849         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2850         if (ret) {
2851                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2852                 goto out_restart;
2853         }
2854
2855         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2856                                            true);
2857         if (ret) {
2858                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2859                 goto out_restart;
2860         }
2861
2862         goto out;
2863
2864 out_restart:
2865         /* things keep failing, better restart the hw */
2866         iwl_mvm_nic_restart(mvm, false);
2867
2868 out:
2869         mutex_unlock(&mvm->mutex);
2870         return ret;
2871 }
2872
2873 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2874                            struct ieee80211_sta *sta,
2875                            bool set)
2876 {
2877         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2878         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2879
2880         if (!mvm_sta || !mvm_sta->vif) {
2881                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2882                 return -EINVAL;
2883         }
2884
2885         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2886 }
2887
2888 #ifdef CONFIG_NL80211_TESTMODE
2889 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2890         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2891         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2892         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2893 };
2894
2895 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2896                                       struct ieee80211_vif *vif,
2897                                       void *data, int len)
2898 {
2899         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2900         int err;
2901         u32 noa_duration;
2902
2903         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2904         if (err)
2905                 return err;
2906
2907         if (!tb[IWL_MVM_TM_ATTR_CMD])
2908                 return -EINVAL;
2909
2910         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2911         case IWL_MVM_TM_CMD_SET_NOA:
2912                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2913                     !vif->bss_conf.enable_beacon ||
2914                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2915                         return -EINVAL;
2916
2917                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2918                 if (noa_duration >= vif->bss_conf.beacon_int)
2919                         return -EINVAL;
2920
2921                 mvm->noa_duration = noa_duration;
2922                 mvm->noa_vif = vif;
2923
2924                 return iwl_mvm_update_quotas(mvm, NULL);
2925         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2926                 /* must be associated client vif - ignore authorized */
2927                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2928                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2929                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2930                         return -EINVAL;
2931
2932                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2933                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2934                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2935         }
2936
2937         return -EOPNOTSUPP;
2938 }
2939
2940 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2941                                     struct ieee80211_vif *vif,
2942                                     void *data, int len)
2943 {
2944         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2945         int err;
2946
2947         mutex_lock(&mvm->mutex);
2948         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2949         mutex_unlock(&mvm->mutex);
2950
2951         return err;
2952 }
2953 #endif
2954
2955 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2956                                           struct ieee80211_vif *vif,
2957                                           struct cfg80211_chan_def *chandef)
2958 {
2959         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2960         struct ieee80211_vif *csa_vif;
2961
2962         mutex_lock(&mvm->mutex);
2963
2964         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2965                                             lockdep_is_held(&mvm->mutex));
2966         if (WARN(csa_vif && csa_vif->csa_active,
2967                  "Another CSA is already in progress"))
2968                 goto out_unlock;
2969
2970         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2971                            chandef->center_freq1);
2972         rcu_assign_pointer(mvm->csa_vif, vif);
2973
2974 out_unlock:
2975         mutex_unlock(&mvm->mutex);
2976 }
2977
2978 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2979                               struct ieee80211_vif *vif, u32 queues, bool drop)
2980 {
2981         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2982         struct iwl_mvm_vif *mvmvif;
2983         struct iwl_mvm_sta *mvmsta;
2984
2985         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2986                 return;
2987
2988         mutex_lock(&mvm->mutex);
2989         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2990         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2991
2992         if (WARN_ON_ONCE(!mvmsta))
2993                 goto done;
2994
2995         if (drop) {
2996                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2997                         IWL_ERR(mvm, "flush request fail\n");
2998         } else {
2999                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3000                                               mvmsta->tfd_queue_msk);
3001         }
3002 done:
3003         mutex_unlock(&mvm->mutex);
3004 }
3005
3006 const struct ieee80211_ops iwl_mvm_hw_ops = {
3007         .tx = iwl_mvm_mac_tx,
3008         .ampdu_action = iwl_mvm_mac_ampdu_action,
3009         .start = iwl_mvm_mac_start,
3010         .restart_complete = iwl_mvm_mac_restart_complete,
3011         .stop = iwl_mvm_mac_stop,
3012         .add_interface = iwl_mvm_mac_add_interface,
3013         .remove_interface = iwl_mvm_mac_remove_interface,
3014         .config = iwl_mvm_mac_config,
3015         .prepare_multicast = iwl_mvm_prepare_multicast,
3016         .configure_filter = iwl_mvm_configure_filter,
3017         .bss_info_changed = iwl_mvm_bss_info_changed,
3018         .hw_scan = iwl_mvm_mac_hw_scan,
3019         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3020         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3021         .sta_state = iwl_mvm_mac_sta_state,
3022         .sta_notify = iwl_mvm_mac_sta_notify,
3023         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3024         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3025         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3026         .sta_rc_update = iwl_mvm_sta_rc_update,
3027         .conf_tx = iwl_mvm_mac_conf_tx,
3028         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3029         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3030         .flush = iwl_mvm_mac_flush,
3031         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3032         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3033         .set_key = iwl_mvm_mac_set_key,
3034         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3035         .remain_on_channel = iwl_mvm_roc,
3036         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3037         .add_chanctx = iwl_mvm_add_chanctx,
3038         .remove_chanctx = iwl_mvm_remove_chanctx,
3039         .change_chanctx = iwl_mvm_change_chanctx,
3040         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3041         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3042         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3043
3044         .start_ap = iwl_mvm_start_ap_ibss,
3045         .stop_ap = iwl_mvm_stop_ap_ibss,
3046         .join_ibss = iwl_mvm_start_ap_ibss,
3047         .leave_ibss = iwl_mvm_stop_ap_ibss,
3048
3049         .set_tim = iwl_mvm_set_tim,
3050
3051         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3052
3053         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3054
3055 #ifdef CONFIG_PM_SLEEP
3056         /* look at d3.c */
3057         .suspend = iwl_mvm_suspend,
3058         .resume = iwl_mvm_resume,
3059         .set_wakeup = iwl_mvm_set_wakeup,
3060         .set_rekey_data = iwl_mvm_set_rekey_data,
3061 #if IS_ENABLED(CONFIG_IPV6)
3062         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3063 #endif
3064         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3065 #endif
3066 };