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

   1 /******************************************************************************
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   6  * GPL LICENSE SUMMARY
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   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  11  * it under the terms of version 2 of the GNU General Public License as
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  14  * This program is distributed in the hope that it will be useful, but
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  20  * along with this program; if not, write to the Free Software
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  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/kernel.h>
  64 #include <linux/slab.h>
  65 #include <linux/skbuff.h>
  66 #include <linux/netdevice.h>
  67 #include <linux/etherdevice.h>
  68 #include <linux/ip.h>
  69 #include <linux/if_arp.h>
  70 #include <net/mac80211.h>
  71 #include <net/ieee80211_radiotap.h>
  72 #include <net/tcp.h>
  73
  74 #include "iwl-op-mode.h"
  75 #include "iwl-io.h"
  76 #include "mvm.h"
  77 #include "sta.h"
  78 #include "time-event.h"
  79 #include "iwl-eeprom-parse.h"
  80 #include "fw-api-scan.h"
  81 #include "iwl-phy-db.h"
  82 #include "testmode.h"
  83 #include "iwl-fw-error-dump.h"
  84 #include "iwl-prph.h"
  85
  86 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_STATION),
  90         },
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_AP) |
  94                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  95                         BIT(NL80211_IFTYPE_P2P_GO),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 104         {
 105                 .num_different_channels = 1,
 106                 .max_interfaces = 3,
 107                 .limits = iwl_mvm_limits,
 108                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 109         },
 110 };
 111
 112 #ifdef CONFIG_PM_SLEEP
 113 static const struct nl80211_wowlan_tcp_data_token_feature
 114 iwl_mvm_wowlan_tcp_token_feature = {
 115         .min_len = 0,
 116         .max_len = 255,
 117         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 118 };
 119
 120 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 121         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 122         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .data_interval_max = 65535, /* __le16 in API */
 127         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .seq = true,
 132 };
 133 #endif
 134
 135 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 136 /*
 137  * Use the reserved field to indicate magic values.
 138  * these values will only be used internally by the driver,
 139  * and won't make it to the fw (reserved will be 0).
 140  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 141  *      be the vif's ip address. in case there is not a single
 142  *      ip address (0, or more than 1), this attribute will
 143  *      be skipped.
 144  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 145  *      the LSB bytes of the vif's mac address
 146  */
 147 enum {
 148         BC_FILTER_MAGIC_NONE = 0,
 149         BC_FILTER_MAGIC_IP,
 150         BC_FILTER_MAGIC_MAC,
 151 };
 152
 153 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 154         {
 155                 /* arp */
 156                 .discard = 0,
 157                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 158                 .attrs = {
 159                         {
 160                                 /* frame type - arp, hw type - ethernet */
 161                                 .offset_type =
 162                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 163                                 .offset = sizeof(rfc1042_header),
 164                                 .val = cpu_to_be32(0x08060001),
 165                                 .mask = cpu_to_be32(0xffffffff),
 166                         },
 167                         {
 168                                 /* arp dest ip */
 169                                 .offset_type =
 170                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 171                                 .offset = sizeof(rfc1042_header) + 2 +
 172                                           sizeof(struct arphdr) +
 173                                           ETH_ALEN + sizeof(__be32) +
 174                                           ETH_ALEN,
 175                                 .mask = cpu_to_be32(0xffffffff),
 176                                 /* mark it as special field */
 177                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 178                         },
 179                 },
 180         },
 181         {
 182                 /* dhcp offer bcast */
 183                 .discard = 0,
 184                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 185                 .attrs = {
 186                         {
 187                                 /* udp dest port - 68 (bootp client)*/
 188                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 189                                 .offset = offsetof(struct udphdr, dest),
 190                                 .val = cpu_to_be32(0x00440000),
 191                                 .mask = cpu_to_be32(0xffff0000),
 192                         },
 193                         {
 194                                 /* dhcp - lsb bytes of client hw address */
 195                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 196                                 .offset = 38,
 197                                 .mask = cpu_to_be32(0xffffffff),
 198                                 /* mark it as special field */
 199                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 200                         },
 201                 },
 202         },
 203         /* last filter must be empty */
 204         {},
 205 };
 206 #endif
 207
 208 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 209 {
 210         if (!iwl_mvm_is_d0i3_supported(mvm))
 211                 return;
 212
 213         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 214         spin_lock_bh(&mvm->refs_lock);
 215         mvm->refs[ref_type]++;
 216         spin_unlock_bh(&mvm->refs_lock);
 217         iwl_trans_ref(mvm->trans);
 218 }
 219
 220 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 221 {
 222         if (!iwl_mvm_is_d0i3_supported(mvm))
 223                 return;
 224
 225         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 226         spin_lock_bh(&mvm->refs_lock);
 227         WARN_ON(!mvm->refs[ref_type]--);
 228         spin_unlock_bh(&mvm->refs_lock);
 229         iwl_trans_unref(mvm->trans);
 230 }
 231
 232 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 233                                      enum iwl_mvm_ref_type except_ref)
 234 {
 235         int i, j;
 236
 237         if (!iwl_mvm_is_d0i3_supported(mvm))
 238                 return;
 239
 240         spin_lock_bh(&mvm->refs_lock);
 241         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 242                 if (except_ref == i || !mvm->refs[i])
 243                         continue;
 244
 245                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 246                               i, mvm->refs[i]);
 247                 for (j = 0; j < mvm->refs[i]; j++)
 248                         iwl_trans_unref(mvm->trans);
 249                 mvm->refs[i] = 0;
 250         }
 251         spin_unlock_bh(&mvm->refs_lock);
 252 }
 253
 254 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 255 {
 256         iwl_mvm_ref(mvm, ref_type);
 257
 258         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 259                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 260                                 HZ)) {
 261                 WARN_ON_ONCE(1);
 262                 iwl_mvm_unref(mvm, ref_type);
 263                 return -EIO;
 264         }
 265
 266         return 0;
 267 }
 268
 269 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 270 {
 271         int i;
 272
 273         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 274         for (i = 0; i < NUM_PHY_CTX; i++) {
 275                 mvm->phy_ctxts[i].id = i;
 276                 mvm->phy_ctxts[i].ref = 0;
 277         }
 278 }
 279
 280 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 281 {
 282         /* we create the 802.11 header and SSID element */
 283         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 284                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 285         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 286 }
 287
 288 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 289 {
 290         struct ieee80211_hw *hw = mvm->hw;
 291         int num_mac, ret, i;
 292
 293         /* Tell mac80211 our characteristics */
 294         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 295                     IEEE80211_HW_SPECTRUM_MGMT |
 296                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 297                     IEEE80211_HW_QUEUE_CONTROL |
 298                     IEEE80211_HW_WANT_MONITOR_VIF |
 299                     IEEE80211_HW_SUPPORTS_PS |
 300                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 301                     IEEE80211_HW_AMPDU_AGGREGATION |
 302                     IEEE80211_HW_TIMING_BEACON_ONLY |
 303                     IEEE80211_HW_CONNECTION_MONITOR |
 304                     IEEE80211_HW_CHANCTX_STA_CSA |
 305                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 306                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 307
 308         hw->queues = mvm->first_agg_queue;
 309         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 310         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 311                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 312         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 313         hw->rate_control_algorithm = "iwl-mvm-rs";
 314
 315         /*
 316          * Enable 11w if advertised by firmware and software crypto
 317          * is not enabled (as the firmware will interpret some mgmt
 318          * packets, so enabling it with software crypto isn't safe)
 319          */
 320         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 321             !iwlwifi_mod_params.sw_crypto)
 322                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 323
 324         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 325             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 326             !iwlwifi_mod_params.uapsd_disable) {
 327                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 328                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 329                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 330         }
 331
 332         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 333                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 334
 335         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 336         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 337         hw->chanctx_data_size = sizeof(u16);
 338
 339         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 340                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 341                 BIT(NL80211_IFTYPE_AP) |
 342                 BIT(NL80211_IFTYPE_P2P_GO) |
 343                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 344                 BIT(NL80211_IFTYPE_ADHOC);
 345
 346         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 347         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 348                                        REGULATORY_DISABLE_BEACON_HINTS;
 349
 350         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 351                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 352
 353         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 354                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 355
 356         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 357         hw->wiphy->n_iface_combinations =
 358                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 359
 360         hw->wiphy->max_remain_on_channel_duration = 10000;
 361         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 362
 363         /* Extract MAC address */
 364         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 365         hw->wiphy->addresses = mvm->addresses;
 366         hw->wiphy->n_addresses = 1;
 367
 368         /* Extract additional MAC addresses if available */
 369         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 370                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 371
 372         for (i = 1; i < num_mac; i++) {
 373                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 374                        ETH_ALEN);
 375                 mvm->addresses[i].addr[5]++;
 376                 hw->wiphy->n_addresses++;
 377         }
 378
 379         iwl_mvm_reset_phy_ctxts(mvm);
 380
 381         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 382
 383         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 384
 385         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 386                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 387                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 388         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 389                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 390                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 391
 392         hw->wiphy->hw_version = mvm->trans->hw_id;
 393
 394         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 395                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 396         else
 397                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 398
 399         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 400         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 401         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 402         /* we create the 802.11 header and zero length SSID IE. */
 403         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 404
 405         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 406                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 407                                NL80211_FEATURE_P2P_GO_OPPPS;
 408
 409         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 410
 411         /* currently FW API supports only one optional cipher scheme */
 412         if (mvm->fw->cs[0].cipher) {
 413                 mvm->hw->n_cipher_schemes = 1;
 414                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 415         }
 416
 417 #ifdef CONFIG_PM_SLEEP
 418         if (iwl_mvm_is_d0i3_supported(mvm) &&
 419             device_can_wakeup(mvm->trans->dev)) {
 420                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 421                 hw->wiphy->wowlan = &mvm->wowlan;
 422         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 423             mvm->trans->ops->d3_suspend &&
 424             mvm->trans->ops->d3_resume &&
 425             device_can_wakeup(mvm->trans->dev)) {
 426                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 427                                     WIPHY_WOWLAN_DISCONNECT |
 428                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 429                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 430                 if (!iwlwifi_mod_params.sw_crypto)
 431                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 432                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 433                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 434
 435                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 436                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 437                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 438                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 439                 hw->wiphy->wowlan = &mvm->wowlan;
 440         }
 441 #endif
 442
 443 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 444         /* assign default bcast filtering configuration */
 445         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 446 #endif
 447
 448         ret = iwl_mvm_leds_init(mvm);
 449         if (ret)
 450                 return ret;
 451
 452         ret = ieee80211_register_hw(mvm->hw);
 453         if (ret)
 454                 iwl_mvm_leds_exit(mvm);
 455
 456         return ret;
 457 }
 458
 459 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 460                              struct ieee80211_sta *sta,
 461                              struct sk_buff *skb)
 462 {
 463         struct iwl_mvm_sta *mvmsta;
 464         bool defer = false;
 465
 466         /*
 467          * double check the IN_D0I3 flag both before and after
 468          * taking the spinlock, in order to prevent taking
 469          * the spinlock when not needed.
 470          */
 471         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 472                 return false;
 473
 474         spin_lock(&mvm->d0i3_tx_lock);
 475         /*
 476          * testing the flag again ensures the skb dequeue
 477          * loop (on d0i3 exit) hasn't run yet.
 478          */
 479         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 480                 goto out;
 481
 482         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 483         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 484             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 485                 goto out;
 486
 487         __skb_queue_tail(&mvm->d0i3_tx, skb);
 488         ieee80211_stop_queues(mvm->hw);
 489
 490         /* trigger wakeup */
 491         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 492         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 493
 494         defer = true;
 495 out:
 496         spin_unlock(&mvm->d0i3_tx_lock);
 497         return defer;
 498 }
 499
 500 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 501                            struct ieee80211_tx_control *control,
 502                            struct sk_buff *skb)
 503 {
 504         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 505         struct ieee80211_sta *sta = control->sta;
 506         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 507         struct ieee80211_hdr *hdr = (void *)skb->data;
 508
 509         if (iwl_mvm_is_radio_killed(mvm)) {
 510                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 511                 goto drop;
 512         }
 513
 514         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 515             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 516                 goto drop;
 517
 518         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 519         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 520                      ieee80211_is_mgmt(hdr->frame_control) &&
 521                      !ieee80211_is_deauth(hdr->frame_control) &&
 522                      !ieee80211_is_disassoc(hdr->frame_control) &&
 523                      !ieee80211_is_action(hdr->frame_control)))
 524                 sta = NULL;
 525
 526         if (sta) {
 527                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 528                         return;
 529                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 530                         goto drop;
 531                 return;
 532         }
 533
 534         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 535                 goto drop;
 536         return;
 537  drop:
 538         ieee80211_free_txskb(hw, skb);
 539 }
 540
 541 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 542 {
 543         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 544                 return false;
 545         return true;
 546 }
 547
 548 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 549 {
 550         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 551                 return false;
 552         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 553                 return true;
 554
 555         /* enabled by default */
 556         return true;
 557 }
 558
 559 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 560                                     struct ieee80211_vif *vif,
 561                                     enum ieee80211_ampdu_mlme_action action,
 562                                     struct ieee80211_sta *sta, u16 tid,
 563                                     u16 *ssn, u8 buf_size)
 564 {
 565         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 566         int ret;
 567         bool tx_agg_ref = false;
 568
 569         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 570                      sta->addr, tid, action);
 571
 572         if (!(mvm->nvm_data->sku_cap_11n_enable))
 573                 return -EACCES;
 574
 575         /* return from D0i3 before starting a new Tx aggregation */
 576         switch (action) {
 577         case IEEE80211_AMPDU_TX_START:
 578         case IEEE80211_AMPDU_TX_STOP_CONT:
 579         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 580         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 581         case IEEE80211_AMPDU_TX_OPERATIONAL:
 582                 /*
 583                  * for tx start, wait synchronously until D0i3 exit to
 584                  * get the correct sequence number for the tid.
 585                  * additionally, some other ampdu actions use direct
 586                  * target access, which is not handled automatically
 587                  * by the trans layer (unlike commands), so wait for
 588                  * d0i3 exit in these cases as well.
 589                  */
 590                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 591                 if (ret)
 592                         return ret;
 593
 594                 tx_agg_ref = true;
 595                 break;
 596         default:
 597                 break;
 598         }
 599
 600         mutex_lock(&mvm->mutex);
 601
 602         switch (action) {
 603         case IEEE80211_AMPDU_RX_START:
 604                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 605                         ret = -EINVAL;
 606                         break;
 607                 }
 608                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 609                 break;
 610         case IEEE80211_AMPDU_RX_STOP:
 611                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 612                 break;
 613         case IEEE80211_AMPDU_TX_START:
 614                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 615                         ret = -EINVAL;
 616                         break;
 617                 }
 618                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 619                 break;
 620         case IEEE80211_AMPDU_TX_STOP_CONT:
 621                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 622                 break;
 623         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 624         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 625                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 626                 break;
 627         case IEEE80211_AMPDU_TX_OPERATIONAL:
 628                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 629                 break;
 630         default:
 631                 WARN_ON_ONCE(1);
 632                 ret = -EINVAL;
 633                 break;
 634         }
 635         mutex_unlock(&mvm->mutex);
 636
 637         /*
 638          * If the tid is marked as started, we won't use it for offloaded
 639          * traffic on the next D0i3 entry. It's safe to unref.
 640          */
 641         if (tx_agg_ref)
 642                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 643
 644         return ret;
 645 }
 646
 647 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 648                                      struct ieee80211_vif *vif)
 649 {
 650         struct iwl_mvm *mvm = data;
 651         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 652
 653         mvmvif->uploaded = false;
 654         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 655
 656         /* does this make sense at all? */
 657         mvmvif->color++;
 658
 659         spin_lock_bh(&mvm->time_event_lock);
 660         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 661         spin_unlock_bh(&mvm->time_event_lock);
 662
 663         mvmvif->phy_ctxt = NULL;
 664         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 665 }
 666
 667 #ifdef CONFIG_IWLWIFI_DEBUGFS
 668 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 669 {
 670         struct iwl_fw_error_dump_file *dump_file;
 671         struct iwl_fw_error_dump_data *dump_data;
 672         struct iwl_fw_error_dump_info *dump_info;
 673         struct iwl_mvm_dump_ptrs *fw_error_dump;
 674         const struct fw_img *img;
 675         u32 sram_len, sram_ofs;
 676         u32 file_len, rxf_len;
 677         unsigned long flags;
 678         int reg_val;
 679
 680         lockdep_assert_held(&mvm->mutex);
 681
 682         if (mvm->fw_error_dump)
 683                 return;
 684
 685         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 686         if (!fw_error_dump)
 687                 return;
 688
 689         img = &mvm->fw->img[mvm->cur_ucode];
 690         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 691         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 692
 693         /* reading buffer size */
 694         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 695         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 696
 697         /* the register holds the value divided by 128 */
 698         rxf_len = rxf_len << 7;
 699
 700         file_len = sizeof(*dump_file) +
 701                    sizeof(*dump_data) * 3 +
 702                    sram_len +
 703                    rxf_len +
 704                    sizeof(*dump_info);
 705
 706         dump_file = vzalloc(file_len);
 707         if (!dump_file) {
 708                 kfree(fw_error_dump);
 709                 return;
 710         }
 711
 712         fw_error_dump->op_mode_ptr = dump_file;
 713
 714         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 715         dump_data = (void *)dump_file->data;
 716
 717         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 718         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 719         dump_info = (void *) dump_data->data;
 720         dump_info->device_family =
 721                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 722                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 723                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 724         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 725                sizeof(dump_info->fw_human_readable));
 726         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 727                 sizeof(dump_info->dev_human_readable));
 728         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 729                 sizeof(dump_info->bus_human_readable));
 730
 731         dump_data = iwl_fw_error_next_data(dump_data);
 732         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 733         dump_data->len = cpu_to_le32(rxf_len);
 734
 735         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 736                 u32 *rxf = (void *)dump_data->data;
 737                 int i;
 738
 739                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 740                         iwl_trans_write_prph(mvm->trans,
 741                                              RXF_LD_FENCE_OFFSET_ADDR,
 742                                              i * sizeof(u32));
 743                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 744                                                      RXF_FIFO_RD_FENCE_ADDR);
 745                 }
 746                 iwl_trans_release_nic_access(mvm->trans, &flags);
 747         }
 748
 749         dump_data = iwl_fw_error_next_data(dump_data);
 750         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 751         dump_data->len = cpu_to_le32(sram_len);
 752         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 753                                  sram_len);
 754
 755         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 756         fw_error_dump->op_mode_len = file_len;
 757         if (fw_error_dump->trans_ptr)
 758                 file_len += fw_error_dump->trans_ptr->len;
 759         dump_file->file_len = cpu_to_le32(file_len);
 760         mvm->fw_error_dump = fw_error_dump;
 761 }
 762 #endif
 763
 764 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 765 {
 766 #ifdef CONFIG_IWLWIFI_DEBUGFS
 767         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 768
 769         iwl_mvm_fw_error_dump(mvm);
 770
 771         /* notify the userspace about the error we had */
 772         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 773 #endif
 774
 775         iwl_trans_stop_device(mvm->trans);
 776
 777         mvm->scan_status = IWL_MVM_SCAN_NONE;
 778
 779         /* just in case one was running */
 780         ieee80211_remain_on_channel_expired(mvm->hw);
 781
 782         ieee80211_iterate_active_interfaces_atomic(
 783                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 784                 iwl_mvm_cleanup_iterator, mvm);
 785
 786         mvm->p2p_device_vif = NULL;
 787         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 788
 789         iwl_mvm_reset_phy_ctxts(mvm);
 790         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 791         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 792         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 793         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 794         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 795         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 796         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 797         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 798
 799         ieee80211_wake_queues(mvm->hw);
 800
 801         /* cleanup all stale references (scan, roc), but keep the
 802          * ucode_down ref until reconfig is complete */
 803         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 804
 805         mvm->vif_count = 0;
 806         mvm->rx_ba_sessions = 0;
 807 }
 808
 809 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 810 {
 811         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 812         int ret;
 813
 814         mutex_lock(&mvm->mutex);
 815
 816         /* Clean up some internal and mac80211 state on restart */
 817         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 818                 iwl_mvm_restart_cleanup(mvm);
 819
 820         ret = iwl_mvm_up(mvm);
 821
 822         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 823                 /* Something went wrong - we need to finish some cleanup
 824                  * that normally iwl_mvm_mac_restart_complete() below
 825                  * would do.
 826                  */
 827                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 828                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 829         }
 830
 831         mutex_unlock(&mvm->mutex);
 832
 833         return ret;
 834 }
 835
 836 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 837 {
 838         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 839         int ret;
 840
 841         mutex_lock(&mvm->mutex);
 842
 843         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 844         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 845         ret = iwl_mvm_update_quotas(mvm, NULL);
 846         if (ret)
 847                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 848                         ret);
 849
 850         /* allow transport/FW low power modes */
 851         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 852
 853         mutex_unlock(&mvm->mutex);
 854 }
 855
 856 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 857 {
 858         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 859
 860         flush_work(&mvm->d0i3_exit_work);
 861         flush_work(&mvm->async_handlers_wk);
 862
 863         mutex_lock(&mvm->mutex);
 864
 865         /* disallow low power states when the FW is down */
 866         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 867
 868         /* async_handlers_wk is now blocked */
 869
 870         /*
 871          * The work item could be running or queued if the
 872          * ROC time event stops just as we get here.
 873          */
 874         cancel_work_sync(&mvm->roc_done_wk);
 875
 876         iwl_trans_stop_device(mvm->trans);
 877
 878         iwl_mvm_async_handlers_purge(mvm);
 879         /* async_handlers_list is empty and will stay empty: HW is stopped */
 880
 881         /* the fw is stopped, the aux sta is dead: clean up driver state */
 882         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 883
 884         mutex_unlock(&mvm->mutex);
 885
 886         /*
 887          * The worker might have been waiting for the mutex, let it run and
 888          * discover that its list is now empty.
 889          */
 890         cancel_work_sync(&mvm->async_handlers_wk);
 891 }
 892
 893 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 894 {
 895         u16 i;
 896
 897         lockdep_assert_held(&mvm->mutex);
 898
 899         for (i = 0; i < NUM_PHY_CTX; i++)
 900                 if (!mvm->phy_ctxts[i].ref)
 901                         return &mvm->phy_ctxts[i];
 902
 903         IWL_ERR(mvm, "No available PHY context\n");
 904         return NULL;
 905 }
 906
 907 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 908                                 s8 tx_power)
 909 {
 910         /* FW is in charge of regulatory enforcement */
 911         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 912                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 913                 .pwr_restriction = cpu_to_le16(tx_power),
 914         };
 915
 916         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 917                                     sizeof(reduce_txpwr_cmd),
 918                                     &reduce_txpwr_cmd);
 919 }
 920
 921 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 922                                      struct ieee80211_vif *vif)
 923 {
 924         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 925         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 926         int ret;
 927
 928         /*
 929          * make sure D0i3 exit is completed, otherwise a target access
 930          * during tx queue configuration could be done when still in
 931          * D0i3 state.
 932          */
 933         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 934         if (ret)
 935                 return ret;
 936
 937         /*
 938          * Not much to do here. The stack will not allow interface
 939          * types or combinations that we didn't advertise, so we
 940          * don't really have to check the types.
 941          */
 942
 943         mutex_lock(&mvm->mutex);
 944
 945         /* Allocate resources for the MAC context, and add it to the fw  */
 946         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 947         if (ret)
 948                 goto out_unlock;
 949
 950         /* Counting number of interfaces is needed for legacy PM */
 951         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 952                 mvm->vif_count++;
 953
 954         /*
 955          * The AP binding flow can be done only after the beacon
 956          * template is configured (which happens only in the mac80211
 957          * start_ap() flow), and adding the broadcast station can happen
 958          * only after the binding.
 959          * In addition, since modifying the MAC before adding a bcast
 960          * station is not allowed by the FW, delay the adding of MAC context to
 961          * the point where we can also add the bcast station.
 962          * In short: there's not much we can do at this point, other than
 963          * allocating resources :)
 964          */
 965         if (vif->type == NL80211_IFTYPE_AP ||
 966             vif->type == NL80211_IFTYPE_ADHOC) {
 967                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 968                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 969                                                qmask,
 970                                                ieee80211_vif_type_p2p(vif));
 971                 if (ret) {
 972                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 973                         goto out_release;
 974                 }
 975
 976                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 977                 goto out_unlock;
 978         }
 979
 980         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 981         if (ret)
 982                 goto out_release;
 983
 984         ret = iwl_mvm_power_update_mac(mvm);
 985         if (ret)
 986                 goto out_release;
 987
 988         /* beacon filtering */
 989         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 990         if (ret)
 991                 goto out_remove_mac;
 992
 993         if (!mvm->bf_allowed_vif &&
 994             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 995                 mvm->bf_allowed_vif = mvmvif;
 996                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 997                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 998         }
 999
1000         /*
1001          * P2P_DEVICE interface does not have a channel context assigned to it,
1002          * so a dedicated PHY context is allocated to it and the corresponding
1003          * MAC context is bound to it at this stage.
1004          */
1005         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1006
1007                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1008                 if (!mvmvif->phy_ctxt) {
1009                         ret = -ENOSPC;
1010                         goto out_free_bf;
1011                 }
1012
1013                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1014                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1015                 if (ret)
1016                         goto out_unref_phy;
1017
1018                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1019                 if (ret)
1020                         goto out_unbind;
1021
1022                 /* Save a pointer to p2p device vif, so it can later be used to
1023                  * update the p2p device MAC when a GO is started/stopped */
1024                 mvm->p2p_device_vif = vif;
1025         }
1026
1027         iwl_mvm_vif_dbgfs_register(mvm, vif);
1028         goto out_unlock;
1029
1030  out_unbind:
1031         iwl_mvm_binding_remove_vif(mvm, vif);
1032  out_unref_phy:
1033         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1034  out_free_bf:
1035         if (mvm->bf_allowed_vif == mvmvif) {
1036                 mvm->bf_allowed_vif = NULL;
1037                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1038                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1039         }
1040  out_remove_mac:
1041         mvmvif->phy_ctxt = NULL;
1042         iwl_mvm_mac_ctxt_remove(mvm, vif);
1043  out_release:
1044         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1045                 mvm->vif_count--;
1046
1047         iwl_mvm_mac_ctxt_release(mvm, vif);
1048  out_unlock:
1049         mutex_unlock(&mvm->mutex);
1050
1051         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1052
1053         return ret;
1054 }
1055
1056 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1057                                         struct ieee80211_vif *vif)
1058 {
1059         u32 tfd_msk = 0, ac;
1060
1061         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1062                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1063                         tfd_msk |= BIT(vif->hw_queue[ac]);
1064
1065         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1066                 tfd_msk |= BIT(vif->cab_queue);
1067
1068         if (tfd_msk) {
1069                 mutex_lock(&mvm->mutex);
1070                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1071                 mutex_unlock(&mvm->mutex);
1072         }
1073
1074         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1075                 /*
1076                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1077                  * We assume here that all the packets sent to the OFFCHANNEL
1078                  * queue are sent in ROC session.
1079                  */
1080                 flush_work(&mvm->roc_done_wk);
1081         } else {
1082                 /*
1083                  * By now, all the AC queues are empty. The AGG queues are
1084                  * empty too. We already got all the Tx responses for all the
1085                  * packets in the queues. The drain work can have been
1086                  * triggered. Flush it.
1087                  */
1088                 flush_work(&mvm->sta_drained_wk);
1089         }
1090 }
1091
1092 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1093                                          struct ieee80211_vif *vif)
1094 {
1095         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1096         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1097
1098         iwl_mvm_prepare_mac_removal(mvm, vif);
1099
1100         mutex_lock(&mvm->mutex);
1101
1102         if (mvm->bf_allowed_vif == mvmvif) {
1103                 mvm->bf_allowed_vif = NULL;
1104                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1105                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1106         }
1107
1108         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1109
1110         /*
1111          * For AP/GO interface, the tear down of the resources allocated to the
1112          * interface is be handled as part of the stop_ap flow.
1113          */
1114         if (vif->type == NL80211_IFTYPE_AP ||
1115             vif->type == NL80211_IFTYPE_ADHOC) {
1116 #ifdef CONFIG_NL80211_TESTMODE
1117                 if (vif == mvm->noa_vif) {
1118                         mvm->noa_vif = NULL;
1119                         mvm->noa_duration = 0;
1120                 }
1121 #endif
1122                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1123                 goto out_release;
1124         }
1125
1126         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1127                 mvm->p2p_device_vif = NULL;
1128                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1129                 iwl_mvm_binding_remove_vif(mvm, vif);
1130                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1131                 mvmvif->phy_ctxt = NULL;
1132         }
1133
1134         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1135                 mvm->vif_count--;
1136
1137         iwl_mvm_power_update_mac(mvm);
1138         iwl_mvm_mac_ctxt_remove(mvm, vif);
1139
1140 out_release:
1141         iwl_mvm_mac_ctxt_release(mvm, vif);
1142         mutex_unlock(&mvm->mutex);
1143 }
1144
1145 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1146 {
1147         return 0;
1148 }
1149
1150 struct iwl_mvm_mc_iter_data {
1151         struct iwl_mvm *mvm;
1152         int port_id;
1153 };
1154
1155 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1156                                       struct ieee80211_vif *vif)
1157 {
1158         struct iwl_mvm_mc_iter_data *data = _data;
1159         struct iwl_mvm *mvm = data->mvm;
1160         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1161         int ret, len;
1162
1163         /* if we don't have free ports, mcast frames will be dropped */
1164         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1165                 return;
1166
1167         if (vif->type != NL80211_IFTYPE_STATION ||
1168             !vif->bss_conf.assoc)
1169                 return;
1170
1171         cmd->port_id = data->port_id++;
1172         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1173         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1174
1175         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1176         if (ret)
1177                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1178 }
1179
1180 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1181 {
1182         struct iwl_mvm_mc_iter_data iter_data = {
1183                 .mvm = mvm,
1184         };
1185
1186         lockdep_assert_held(&mvm->mutex);
1187
1188         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1189                 return;
1190
1191         ieee80211_iterate_active_interfaces_atomic(
1192                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1193                 iwl_mvm_mc_iface_iterator, &iter_data);
1194 }
1195
1196 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1197                                      struct netdev_hw_addr_list *mc_list)
1198 {
1199         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1200         struct iwl_mcast_filter_cmd *cmd;
1201         struct netdev_hw_addr *addr;
1202         int addr_count = netdev_hw_addr_list_count(mc_list);
1203         bool pass_all = false;
1204         int len;
1205
1206         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1207                 pass_all = true;
1208                 addr_count = 0;
1209         }
1210
1211         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1212         cmd = kzalloc(len, GFP_ATOMIC);
1213         if (!cmd)
1214                 return 0;
1215
1216         if (pass_all) {
1217                 cmd->pass_all = 1;
1218                 return (u64)(unsigned long)cmd;
1219         }
1220
1221         netdev_hw_addr_list_for_each(addr, mc_list) {
1222                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1223                                    cmd->count, addr->addr);
1224                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1225                        addr->addr, ETH_ALEN);
1226                 cmd->count++;
1227         }
1228
1229         return (u64)(unsigned long)cmd;
1230 }
1231
1232 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1233                                      unsigned int changed_flags,
1234                                      unsigned int *total_flags,
1235                                      u64 multicast)
1236 {
1237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1238         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1239
1240         mutex_lock(&mvm->mutex);
1241
1242         /* replace previous configuration */
1243         kfree(mvm->mcast_filter_cmd);
1244         mvm->mcast_filter_cmd = cmd;
1245
1246         if (!cmd)
1247                 goto out;
1248
1249         iwl_mvm_recalc_multicast(mvm);
1250 out:
1251         mutex_unlock(&mvm->mutex);
1252         *total_flags = 0;
1253 }
1254
1255 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1256 struct iwl_bcast_iter_data {
1257         struct iwl_mvm *mvm;
1258         struct iwl_bcast_filter_cmd *cmd;
1259         u8 current_filter;
1260 };
1261
1262 static void
1263 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1264                          const struct iwl_fw_bcast_filter *in_filter,
1265                          struct iwl_fw_bcast_filter *out_filter)
1266 {
1267         struct iwl_fw_bcast_filter_attr *attr;
1268         int i;
1269
1270         memcpy(out_filter, in_filter, sizeof(*out_filter));
1271
1272         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1273                 attr = &out_filter->attrs[i];
1274
1275                 if (!attr->mask)
1276                         break;
1277
1278                 switch (attr->reserved1) {
1279                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1280                         if (vif->bss_conf.arp_addr_cnt != 1) {
1281                                 attr->mask = 0;
1282                                 continue;
1283                         }
1284
1285                         attr->val = vif->bss_conf.arp_addr_list[0];
1286                         break;
1287                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1288                         attr->val = *(__be32 *)&vif->addr[2];
1289                         break;
1290                 default:
1291                         break;
1292                 }
1293                 attr->reserved1 = 0;
1294                 out_filter->num_attrs++;
1295         }
1296 }
1297
1298 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1299                                           struct ieee80211_vif *vif)
1300 {
1301         struct iwl_bcast_iter_data *data = _data;
1302         struct iwl_mvm *mvm = data->mvm;
1303         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1304         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1305         struct iwl_fw_bcast_mac *bcast_mac;
1306         int i;
1307
1308         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1309                 return;
1310
1311         bcast_mac = &cmd->macs[mvmvif->id];
1312
1313         /*
1314          * enable filtering only for associated stations, but not for P2P
1315          * Clients
1316          */
1317         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1318             !vif->bss_conf.assoc)
1319                 return;
1320
1321         bcast_mac->default_discard = 1;
1322
1323         /* copy all configured filters */
1324         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1325                 /*
1326                  * Make sure we don't exceed our filters limit.
1327                  * if there is still a valid filter to be configured,
1328                  * be on the safe side and just allow bcast for this mac.
1329                  */
1330                 if (WARN_ON_ONCE(data->current_filter >=
1331                                  ARRAY_SIZE(cmd->filters))) {
1332                         bcast_mac->default_discard = 0;
1333                         bcast_mac->attached_filters = 0;
1334                         break;
1335                 }
1336
1337                 iwl_mvm_set_bcast_filter(vif,
1338                                          &mvm->bcast_filters[i],
1339                                          &cmd->filters[data->current_filter]);
1340
1341                 /* skip current filter if it contains no attributes */
1342                 if (!cmd->filters[data->current_filter].num_attrs)
1343                         continue;
1344
1345                 /* attach the filter to current mac */
1346                 bcast_mac->attached_filters |=
1347                                 cpu_to_le16(BIT(data->current_filter));
1348
1349                 data->current_filter++;
1350         }
1351 }
1352
1353 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1354                                     struct iwl_bcast_filter_cmd *cmd)
1355 {
1356         struct iwl_bcast_iter_data iter_data = {
1357                 .mvm = mvm,
1358                 .cmd = cmd,
1359         };
1360
1361         memset(cmd, 0, sizeof(*cmd));
1362         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1363         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1364
1365 #ifdef CONFIG_IWLWIFI_DEBUGFS
1366         /* use debugfs filters/macs if override is configured */
1367         if (mvm->dbgfs_bcast_filtering.override) {
1368                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1369                        sizeof(cmd->filters));
1370                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1371                        sizeof(cmd->macs));
1372                 return true;
1373         }
1374 #endif
1375
1376         /* if no filters are configured, do nothing */
1377         if (!mvm->bcast_filters)
1378                 return false;
1379
1380         /* configure and attach these filters for each associated sta vif */
1381         ieee80211_iterate_active_interfaces(
1382                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1383                 iwl_mvm_bcast_filter_iterator, &iter_data);
1384
1385         return true;
1386 }
1387 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1388                                           struct ieee80211_vif *vif)
1389 {
1390         struct iwl_bcast_filter_cmd cmd;
1391
1392         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1393                 return 0;
1394
1395         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1396                 return 0;
1397
1398         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1399                                     sizeof(cmd), &cmd);
1400 }
1401 #else
1402 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1403                                                  struct ieee80211_vif *vif)
1404 {
1405         return 0;
1406 }
1407 #endif
1408
1409 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1410 {
1411         struct ieee80211_sta *sta;
1412         struct iwl_mvm_sta *mvmsta;
1413         int i;
1414
1415         lockdep_assert_held(&mvm->mutex);
1416
1417         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1418                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1419                                                 lockdep_is_held(&mvm->mutex));
1420                 if (!sta || IS_ERR(sta) || !sta->tdls)
1421                         continue;
1422
1423                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1424                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1425                                 NL80211_TDLS_TEARDOWN,
1426                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1427                                 GFP_KERNEL);
1428         }
1429 }
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         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1448         if (ret)
1449                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1450
1451         if (changes & BSS_CHANGED_ASSOC) {
1452                 if (bss_conf->assoc) {
1453                         /* add quota for this interface */
1454                         ret = iwl_mvm_update_quotas(mvm, NULL);
1455                         if (ret) {
1456                                 IWL_ERR(mvm, "failed to update quotas\n");
1457                                 return;
1458                         }
1459
1460                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1461                                      &mvm->status)) {
1462                                 /*
1463                                  * If we're restarting then the firmware will
1464                                  * obviously have lost synchronisation with
1465                                  * the AP. It will attempt to synchronise by
1466                                  * itself, but we can make it more reliable by
1467                                  * scheduling a session protection time event.
1468                                  *
1469                                  * The firmware needs to receive a beacon to
1470                                  * catch up with synchronisation, use 110% of
1471                                  * the beacon interval.
1472                                  *
1473                                  * Set a large maximum delay to allow for more
1474                                  * than a single interface.
1475                                  */
1476                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1477                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1478                                                         5 * dur);
1479                         }
1480
1481                         iwl_mvm_sf_update(mvm, vif, false);
1482                         iwl_mvm_power_vif_assoc(mvm, vif);
1483                         if (vif->p2p)
1484                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1485                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1486                         /*
1487                          * If update fails - SF might be running in associated
1488                          * mode while disassociated - which is forbidden.
1489                          */
1490                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1491                                   "Failed to update SF upon disassociation\n");
1492
1493                         /* remove AP station now that the MAC is unassoc */
1494                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1495                         if (ret)
1496                                 IWL_ERR(mvm, "failed to remove AP station\n");
1497
1498                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1499                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1500                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1501                         /* remove quota for this interface */
1502                         ret = iwl_mvm_update_quotas(mvm, NULL);
1503                         if (ret)
1504                                 IWL_ERR(mvm, "failed to update quotas\n");
1505
1506                         if (vif->p2p)
1507                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1508                 }
1509
1510                 iwl_mvm_recalc_multicast(mvm);
1511                 iwl_mvm_configure_bcast_filter(mvm, vif);
1512
1513                 /* reset rssi values */
1514                 mvmvif->bf_data.ave_beacon_signal = 0;
1515
1516                 iwl_mvm_bt_coex_vif_change(mvm);
1517                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1518                                     IEEE80211_SMPS_AUTOMATIC);
1519         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1520                 /*
1521                  * We received a beacon _after_ association so
1522                  * remove the session protection.
1523                  */
1524                 iwl_mvm_remove_time_event(mvm, mvmvif,
1525                                           &mvmvif->time_event_data);
1526         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1527                               BSS_CHANGED_QOS)) {
1528                 ret = iwl_mvm_power_update_mac(mvm);
1529                 if (ret)
1530                         IWL_ERR(mvm, "failed to update power mode\n");
1531         }
1532
1533         if (changes & BSS_CHANGED_BEACON_INFO) {
1534                 iwl_mvm_sf_update(mvm, vif, false);
1535                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1536         }
1537
1538         if (changes & BSS_CHANGED_TXPOWER) {
1539                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1540                                 bss_conf->txpower);
1541                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1542         }
1543
1544         if (changes & BSS_CHANGED_CQM) {
1545                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1546                 /* reset cqm events tracking */
1547                 mvmvif->bf_data.last_cqm_event = 0;
1548                 if (mvmvif->bf_data.bf_enabled) {
1549                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1550                         if (ret)
1551                                 IWL_ERR(mvm,
1552                                         "failed to update CQM thresholds\n");
1553                 }
1554         }
1555
1556         if (changes & BSS_CHANGED_ARP_FILTER) {
1557                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1558                 iwl_mvm_configure_bcast_filter(mvm, vif);
1559         }
1560 }
1561
1562 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1563                                  struct ieee80211_vif *vif)
1564 {
1565         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1566         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1567         int ret;
1568
1569         /*
1570          * iwl_mvm_mac_ctxt_add() might read directly from the device
1571          * (the system time), so make sure it is available.
1572          */
1573         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1574         if (ret)
1575                 return ret;
1576
1577         mutex_lock(&mvm->mutex);
1578
1579         /* Send the beacon template */
1580         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1581         if (ret)
1582                 goto out_unlock;
1583
1584         /*
1585          * Re-calculate the tsf id, as the master-slave relations depend on the
1586          * beacon interval, which was not known when the AP interface was added.
1587          */
1588         if (vif->type == NL80211_IFTYPE_AP)
1589                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1590
1591         /* Add the mac context */
1592         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1593         if (ret)
1594                 goto out_unlock;
1595
1596         /* Perform the binding */
1597         ret = iwl_mvm_binding_add_vif(mvm, vif);
1598         if (ret)
1599                 goto out_remove;
1600
1601         /* Send the bcast station. At this stage the TBTT and DTIM time events
1602          * are added and applied to the scheduler */
1603         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1604         if (ret)
1605                 goto out_unbind;
1606
1607         /* must be set before quota calculations */
1608         mvmvif->ap_ibss_active = true;
1609
1610         /* power updated needs to be done before quotas */
1611         iwl_mvm_power_update_mac(mvm);
1612
1613         ret = iwl_mvm_update_quotas(mvm, NULL);
1614         if (ret)
1615                 goto out_quota_failed;
1616
1617         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1618         if (vif->p2p && mvm->p2p_device_vif)
1619                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1620
1621         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1622
1623         iwl_mvm_bt_coex_vif_change(mvm);
1624
1625         /* we don't support TDLS during DCM */
1626         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1627                 iwl_mvm_teardown_tdls_peers(mvm);
1628
1629         mutex_unlock(&mvm->mutex);
1630         return 0;
1631
1632 out_quota_failed:
1633         iwl_mvm_power_update_mac(mvm);
1634         mvmvif->ap_ibss_active = false;
1635         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1636 out_unbind:
1637         iwl_mvm_binding_remove_vif(mvm, vif);
1638 out_remove:
1639         iwl_mvm_mac_ctxt_remove(mvm, vif);
1640 out_unlock:
1641         mutex_unlock(&mvm->mutex);
1642         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1643         return ret;
1644 }
1645
1646 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1647                                  struct ieee80211_vif *vif)
1648 {
1649         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1650         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1651
1652         iwl_mvm_prepare_mac_removal(mvm, vif);
1653
1654         mutex_lock(&mvm->mutex);
1655
1656         /* Handle AP stop while in CSA */
1657         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1658                 iwl_mvm_remove_time_event(mvm, mvmvif,
1659                                           &mvmvif->time_event_data);
1660                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1661         }
1662
1663         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1664                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1665                 mvm->csa_tx_block_bcn_timeout = 0;
1666         }
1667
1668         mvmvif->ap_ibss_active = false;
1669         mvm->ap_last_beacon_gp2 = 0;
1670
1671         iwl_mvm_bt_coex_vif_change(mvm);
1672
1673         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1674
1675         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1676         if (vif->p2p && mvm->p2p_device_vif)
1677                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1678
1679         iwl_mvm_update_quotas(mvm, NULL);
1680         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1681         iwl_mvm_binding_remove_vif(mvm, vif);
1682
1683         iwl_mvm_power_update_mac(mvm);
1684
1685         iwl_mvm_mac_ctxt_remove(mvm, vif);
1686
1687         mutex_unlock(&mvm->mutex);
1688 }
1689
1690 static void
1691 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1692                                  struct ieee80211_vif *vif,
1693                                  struct ieee80211_bss_conf *bss_conf,
1694                                  u32 changes)
1695 {
1696         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1697
1698         /* Changes will be applied when the AP/IBSS is started */
1699         if (!mvmvif->ap_ibss_active)
1700                 return;
1701
1702         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1703                        BSS_CHANGED_BANDWIDTH) &&
1704             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1705                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1706
1707         /* Need to send a new beacon template to the FW */
1708         if (changes & BSS_CHANGED_BEACON &&
1709             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1710                 IWL_WARN(mvm, "Failed updating beacon data\n");
1711 }
1712
1713 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1714                                      struct ieee80211_vif *vif,
1715                                      struct ieee80211_bss_conf *bss_conf,
1716                                      u32 changes)
1717 {
1718         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1719
1720         /*
1721          * iwl_mvm_bss_info_changed_station() might call
1722          * iwl_mvm_protect_session(), which reads directly from
1723          * the device (the system time), so make sure it is available.
1724          */
1725         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1726                 return;
1727
1728         mutex_lock(&mvm->mutex);
1729
1730         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1731                 iwl_mvm_scan_offload_stop(mvm, true);
1732
1733         switch (vif->type) {
1734         case NL80211_IFTYPE_STATION:
1735                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1736                 break;
1737         case NL80211_IFTYPE_AP:
1738         case NL80211_IFTYPE_ADHOC:
1739                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1740                 break;
1741         default:
1742                 /* shouldn't happen */
1743                 WARN_ON_ONCE(1);
1744         }
1745
1746         mutex_unlock(&mvm->mutex);
1747         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1748 }
1749
1750 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1751                                           enum iwl_scan_status scan_type)
1752 {
1753         int ret;
1754         bool wait_for_handlers = false;
1755
1756         mutex_lock(&mvm->mutex);
1757
1758         if (mvm->scan_status != scan_type) {
1759                 ret = 0;
1760                 /* make sure there are no pending notifications */
1761                 wait_for_handlers = true;
1762                 goto out;
1763         }
1764
1765         switch (scan_type) {
1766         case IWL_MVM_SCAN_SCHED:
1767                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1768                 break;
1769         case IWL_MVM_SCAN_OS:
1770                 ret = iwl_mvm_cancel_scan(mvm);
1771                 break;
1772         case IWL_MVM_SCAN_NONE:
1773         default:
1774                 WARN_ON_ONCE(1);
1775                 ret = -EINVAL;
1776                 break;
1777         }
1778         if (ret)
1779                 goto out;
1780
1781         wait_for_handlers = true;
1782 out:
1783         mutex_unlock(&mvm->mutex);
1784
1785         /* make sure we consume the completion notification */
1786         if (wait_for_handlers)
1787                 iwl_mvm_wait_for_async_handlers(mvm);
1788
1789         return ret;
1790 }
1791 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1792                                struct ieee80211_vif *vif,
1793                                struct ieee80211_scan_request *hw_req)
1794 {
1795         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1796         struct cfg80211_scan_request *req = &hw_req->req;
1797         int ret;
1798
1799         if (req->n_channels == 0 ||
1800             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1801                 return -EINVAL;
1802
1803         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1804         if (ret)
1805                 return ret;
1806
1807         mutex_lock(&mvm->mutex);
1808
1809         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1810                 ret = -EBUSY;
1811                 goto out;
1812         }
1813
1814         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1815
1816         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1817                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1818         else
1819                 ret = iwl_mvm_scan_request(mvm, vif, req);
1820
1821         if (ret)
1822                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1823 out:
1824         mutex_unlock(&mvm->mutex);
1825         return ret;
1826 }
1827
1828 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1829                                        struct ieee80211_vif *vif)
1830 {
1831         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1832
1833         mutex_lock(&mvm->mutex);
1834
1835         iwl_mvm_cancel_scan(mvm);
1836
1837         mutex_unlock(&mvm->mutex);
1838 }
1839
1840 static void
1841 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1842                                   struct ieee80211_sta *sta, u16 tids,
1843                                   int num_frames,
1844                                   enum ieee80211_frame_release_type reason,
1845                                   bool more_data)
1846 {
1847         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1848
1849         /* Called when we need to transmit (a) frame(s) from mac80211 */
1850
1851         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1852                                           tids, more_data, false);
1853 }
1854
1855 static void
1856 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1857                                     struct ieee80211_sta *sta, u16 tids,
1858                                     int num_frames,
1859                                     enum ieee80211_frame_release_type reason,
1860                                     bool more_data)
1861 {
1862         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1863
1864         /* Called when we need to transmit (a) frame(s) from agg queue */
1865
1866         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1867                                           tids, more_data, true);
1868 }
1869
1870 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1871                                    struct ieee80211_vif *vif,
1872                                    enum sta_notify_cmd cmd,
1873                                    struct ieee80211_sta *sta)
1874 {
1875         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1876         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1877         int tid;
1878
1879         switch (cmd) {
1880         case STA_NOTIFY_SLEEP:
1881                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1882                         ieee80211_sta_block_awake(hw, sta, true);
1883                 spin_lock_bh(&mvmsta->lock);
1884                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1885                         struct iwl_mvm_tid_data *tid_data;
1886
1887                         tid_data = &mvmsta->tid_data[tid];
1888                         if (tid_data->state != IWL_AGG_ON &&
1889                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1890                                 continue;
1891                         if (iwl_mvm_tid_queued(tid_data) == 0)
1892                                 continue;
1893                         ieee80211_sta_set_buffered(sta, tid, true);
1894                 }
1895                 spin_unlock_bh(&mvmsta->lock);
1896                 /*
1897                  * The fw updates the STA to be asleep. Tx packets on the Tx
1898                  * queues to this station will not be transmitted. The fw will
1899                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1900                  */
1901                 break;
1902         case STA_NOTIFY_AWAKE:
1903                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1904                         break;
1905                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1906                 break;
1907         default:
1908                 break;
1909         }
1910 }
1911
1912 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1913                                        struct ieee80211_vif *vif,
1914                                        struct ieee80211_sta *sta)
1915 {
1916         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1917         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1918
1919         /*
1920          * This is called before mac80211 does RCU synchronisation,
1921          * so here we already invalidate our internal RCU-protected
1922          * station pointer. The rest of the code will thus no longer
1923          * be able to find the station this way, and we don't rely
1924          * on further RCU synchronisation after the sta_state()
1925          * callback deleted the station.
1926          */
1927         mutex_lock(&mvm->mutex);
1928         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1929                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1930                                    ERR_PTR(-ENOENT));
1931         mutex_unlock(&mvm->mutex);
1932 }
1933
1934 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1935 {
1936         struct ieee80211_sta *sta;
1937         struct iwl_mvm_sta *mvmsta;
1938         int count = 0;
1939         int i;
1940
1941         lockdep_assert_held(&mvm->mutex);
1942
1943         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1944                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1945                                                 lockdep_is_held(&mvm->mutex));
1946                 if (!sta || IS_ERR(sta) || !sta->tdls)
1947                         continue;
1948
1949                 if (vif) {
1950                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1951                         if (mvmsta->vif != vif)
1952                                 continue;
1953                 }
1954
1955                 count++;
1956         }
1957
1958         return count;
1959 }
1960
1961 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1962                                       struct ieee80211_vif *vif,
1963                                       bool sta_added)
1964 {
1965         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1966
1967         /*
1968          * Disable ps when the first TDLS sta is added and re-enable it
1969          * when the last TDLS sta is removed
1970          */
1971         if ((tdls_sta_cnt == 1 && sta_added) ||
1972             (tdls_sta_cnt == 0 && !sta_added))
1973                 iwl_mvm_power_update_mac(mvm);
1974 }
1975
1976 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1977                                  struct ieee80211_vif *vif,
1978                                  struct ieee80211_sta *sta,
1979                                  enum ieee80211_sta_state old_state,
1980                                  enum ieee80211_sta_state new_state)
1981 {
1982         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1983         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1984         int ret;
1985
1986         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1987                            sta->addr, old_state, new_state);
1988
1989         /* this would be a mac80211 bug ... but don't crash */
1990         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1991                 return -EINVAL;
1992
1993         /* if a STA is being removed, reuse its ID */
1994         flush_work(&mvm->sta_drained_wk);
1995
1996         mutex_lock(&mvm->mutex);
1997         if (old_state == IEEE80211_STA_NOTEXIST &&
1998             new_state == IEEE80211_STA_NONE) {
1999                 /*
2000                  * Firmware bug - it'll crash if the beacon interval is less
2001                  * than 16. We can't avoid connecting at all, so refuse the
2002                  * station state change, this will cause mac80211 to abandon
2003                  * attempts to connect to this AP, and eventually wpa_s will
2004                  * blacklist the AP...
2005                  */
2006                 if (vif->type == NL80211_IFTYPE_STATION &&
2007                     vif->bss_conf.beacon_int < 16) {
2008                         IWL_ERR(mvm,
2009                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2010                                 sta->addr, vif->bss_conf.beacon_int);
2011                         ret = -EINVAL;
2012                         goto out_unlock;
2013                 }
2014
2015                 if (sta->tdls &&
2016                     (vif->p2p ||
2017                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2018                                                 IWL_MVM_TDLS_STA_COUNT ||
2019                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2020                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2021                         ret = -EBUSY;
2022                         goto out_unlock;
2023                 }
2024
2025                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2026                 if (sta->tdls && ret == 0)
2027                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2028         } else if (old_state == IEEE80211_STA_NONE &&
2029                    new_state == IEEE80211_STA_AUTH) {
2030                 /*
2031                  * EBS may be disabled due to previous failures reported by FW.
2032                  * Reset EBS status here assuming environment has been changed.
2033                  */
2034                 mvm->last_ebs_successful = true;
2035                 ret = 0;
2036         } else if (old_state == IEEE80211_STA_AUTH &&
2037                    new_state == IEEE80211_STA_ASSOC) {
2038                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2039                 if (ret == 0)
2040                         iwl_mvm_rs_rate_init(mvm, sta,
2041                                              mvmvif->phy_ctxt->channel->band,
2042                                              true);
2043         } else if (old_state == IEEE80211_STA_ASSOC &&
2044                    new_state == IEEE80211_STA_AUTHORIZED) {
2045
2046                 /* we don't support TDLS during DCM */
2047                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2048                         iwl_mvm_teardown_tdls_peers(mvm);
2049
2050                 /* enable beacon filtering */
2051                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2052                 ret = 0;
2053         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2054                    new_state == IEEE80211_STA_ASSOC) {
2055                 /* disable beacon filtering */
2056                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2057                 ret = 0;
2058         } else if (old_state == IEEE80211_STA_ASSOC &&
2059                    new_state == IEEE80211_STA_AUTH) {
2060                 ret = 0;
2061         } else if (old_state == IEEE80211_STA_AUTH &&
2062                    new_state == IEEE80211_STA_NONE) {
2063                 ret = 0;
2064         } else if (old_state == IEEE80211_STA_NONE &&
2065                    new_state == IEEE80211_STA_NOTEXIST) {
2066                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2067                 if (sta->tdls)
2068                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2069         } else {
2070                 ret = -EIO;
2071         }
2072  out_unlock:
2073         mutex_unlock(&mvm->mutex);
2074
2075         return ret;
2076 }
2077
2078 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2079 {
2080         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2081
2082         mvm->rts_threshold = value;
2083
2084         return 0;
2085 }
2086
2087 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2088                                   struct ieee80211_vif *vif,
2089                                   struct ieee80211_sta *sta, u32 changed)
2090 {
2091         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2092
2093         if (vif->type == NL80211_IFTYPE_STATION &&
2094             changed & IEEE80211_RC_NSS_CHANGED)
2095                 iwl_mvm_sf_update(mvm, vif, false);
2096 }
2097
2098 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2099                                struct ieee80211_vif *vif, u16 ac,
2100                                const struct ieee80211_tx_queue_params *params)
2101 {
2102         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2104
2105         mvmvif->queue_params[ac] = *params;
2106
2107         /*
2108          * No need to update right away, we'll get BSS_CHANGED_QOS
2109          * The exception is P2P_DEVICE interface which needs immediate update.
2110          */
2111         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2112                 int ret;
2113
2114                 mutex_lock(&mvm->mutex);
2115                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2116                 mutex_unlock(&mvm->mutex);
2117                 return ret;
2118         }
2119         return 0;
2120 }
2121
2122 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2123                                       struct ieee80211_vif *vif)
2124 {
2125         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2126         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2127                            200 + vif->bss_conf.beacon_int);
2128         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2129                                100 + vif->bss_conf.beacon_int);
2130
2131         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2132                 return;
2133
2134         /*
2135          * iwl_mvm_protect_session() reads directly from the device
2136          * (the system time), so make sure it is available.
2137          */
2138         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2139                 return;
2140
2141         mutex_lock(&mvm->mutex);
2142         /* Try really hard to protect the session and hear a beacon */
2143         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
2144         mutex_unlock(&mvm->mutex);
2145
2146         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2147 }
2148
2149 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2150                                                   struct ieee80211_vif *vif)
2151 {
2152         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2153         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2154
2155         /*
2156          * iwl_mvm_protect_session() reads directly from the device
2157          * (the system time), so make sure it is available.
2158          */
2159         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2160                 return;
2161
2162         mutex_lock(&mvm->mutex);
2163         /* Protect the session to hear the TDLS setup response on the channel */
2164         iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
2165         mutex_unlock(&mvm->mutex);
2166
2167         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2168 }
2169
2170 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2171                                         struct ieee80211_vif *vif,
2172                                         struct cfg80211_sched_scan_request *req,
2173                                         struct ieee80211_scan_ies *ies)
2174 {
2175         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2176         int ret;
2177
2178         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2179         if (ret)
2180                 return ret;
2181
2182         mutex_lock(&mvm->mutex);
2183
2184         if (!iwl_mvm_is_idle(mvm)) {
2185                 ret = -EBUSY;
2186                 goto out;
2187         }
2188
2189         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2190                 ret = -EBUSY;
2191                 goto out;
2192         }
2193
2194         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2195
2196         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2197                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2198                 if (ret)
2199                         goto err;
2200         }
2201
2202         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2203         if (ret)
2204                 goto err;
2205
2206         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2207                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2208         else
2209                 ret = iwl_mvm_sched_scan_start(mvm, req);
2210
2211         if (!ret)
2212                 goto out;
2213 err:
2214         mvm->scan_status = IWL_MVM_SCAN_NONE;
2215 out:
2216         mutex_unlock(&mvm->mutex);
2217         return ret;
2218 }
2219
2220 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2221                                        struct ieee80211_vif *vif)
2222 {
2223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2224         int ret;
2225
2226         mutex_lock(&mvm->mutex);
2227         ret = iwl_mvm_scan_offload_stop(mvm, false);
2228         mutex_unlock(&mvm->mutex);
2229         iwl_mvm_wait_for_async_handlers(mvm);
2230
2231         return ret;
2232 }
2233
2234 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2235                                enum set_key_cmd cmd,
2236                                struct ieee80211_vif *vif,
2237                                struct ieee80211_sta *sta,
2238                                struct ieee80211_key_conf *key)
2239 {
2240         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2241         int ret;
2242
2243         if (iwlwifi_mod_params.sw_crypto) {
2244                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2245                 return -EOPNOTSUPP;
2246         }
2247
2248         switch (key->cipher) {
2249         case WLAN_CIPHER_SUITE_TKIP:
2250                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2251                 /* fall-through */
2252         case WLAN_CIPHER_SUITE_CCMP:
2253                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2254                 break;
2255         case WLAN_CIPHER_SUITE_AES_CMAC:
2256                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2257                 break;
2258         case WLAN_CIPHER_SUITE_WEP40:
2259         case WLAN_CIPHER_SUITE_WEP104:
2260                 /*
2261                  * Support for TX only, at least for now, so accept
2262                  * the key and do nothing else. Then mac80211 will
2263                  * pass it for TX but we don't have to use it for RX.
2264                  */
2265                 return 0;
2266         default:
2267                 /* currently FW supports only one optional cipher scheme */
2268                 if (hw->n_cipher_schemes &&
2269                     hw->cipher_schemes->cipher == key->cipher)
2270                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2271                 else
2272                         return -EOPNOTSUPP;
2273         }
2274
2275         mutex_lock(&mvm->mutex);
2276
2277         switch (cmd) {
2278         case SET_KEY:
2279                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2280                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2281                         /*
2282                          * GTK on AP interface is a TX-only key, return 0;
2283                          * on IBSS they're per-station and because we're lazy
2284                          * we don't support them for RX, so do the same.
2285                          */
2286                         ret = 0;
2287                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2288                         break;
2289                 }
2290
2291                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2292                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2293                 if (ret) {
2294                         IWL_WARN(mvm, "set key failed\n");
2295                         /*
2296                          * can't add key for RX, but we don't need it
2297                          * in the device for TX so still return 0
2298                          */
2299                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2300                         ret = 0;
2301                 }
2302
2303                 break;
2304         case DISABLE_KEY:
2305                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2306                         ret = 0;
2307                         break;
2308                 }
2309
2310                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2311                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2312                 break;
2313         default:
2314                 ret = -EINVAL;
2315         }
2316
2317         mutex_unlock(&mvm->mutex);
2318         return ret;
2319 }
2320
2321 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2322                                         struct ieee80211_vif *vif,
2323                                         struct ieee80211_key_conf *keyconf,
2324                                         struct ieee80211_sta *sta,
2325                                         u32 iv32, u16 *phase1key)
2326 {
2327         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2328
2329         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2330                 return;
2331
2332         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2333 }
2334
2335
2336 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2337                                struct iwl_rx_packet *pkt, void *data)
2338 {
2339         struct iwl_mvm *mvm =
2340                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2341         struct iwl_hs20_roc_res *resp;
2342         int resp_len = iwl_rx_packet_payload_len(pkt);
2343         struct iwl_mvm_time_event_data *te_data = data;
2344
2345         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2346                 return true;
2347
2348         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2349                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2350                 return true;
2351         }
2352
2353         resp = (void *)pkt->data;
2354
2355         IWL_DEBUG_TE(mvm,
2356                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2357                      resp->status, resp->event_unique_id);
2358
2359         te_data->uid = le32_to_cpu(resp->event_unique_id);
2360         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2361                      te_data->uid);
2362
2363         spin_lock_bh(&mvm->time_event_lock);
2364         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2365         spin_unlock_bh(&mvm->time_event_lock);
2366
2367         return true;
2368 }
2369
2370 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2371 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2372                                     struct ieee80211_channel *channel,
2373                                     struct ieee80211_vif *vif,
2374                                     int duration)
2375 {
2376         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2377         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2378         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2379         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2380         struct iwl_notification_wait wait_time_event;
2381         struct iwl_hs20_roc_req aux_roc_req = {
2382                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2383                 .id_and_color =
2384                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2385                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2386                 /* Set the channel info data */
2387                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2388                         PHY_BAND_24 : PHY_BAND_5,
2389                 .channel_info.channel = channel->hw_value,
2390                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2391                 /* Set the time and duration */
2392                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2393                 .apply_time_max_delay =
2394                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2395                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2396          };
2397
2398         /* Set the node address */
2399         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2400
2401         te_data->vif = vif;
2402         te_data->duration = duration;
2403         te_data->id = HOT_SPOT_CMD;
2404
2405         lockdep_assert_held(&mvm->mutex);
2406
2407         spin_lock_bh(&mvm->time_event_lock);
2408         list_add_tail(&te_data->list, &mvm->time_event_list);
2409         spin_unlock_bh(&mvm->time_event_lock);
2410
2411         /*
2412          * Use a notification wait, which really just processes the
2413          * command response and doesn't wait for anything, in order
2414          * to be able to process the response and get the UID inside
2415          * the RX path. Using CMD_WANT_SKB doesn't work because it
2416          * stores the buffer and then wakes up this thread, by which
2417          * time another notification (that the time event started)
2418          * might already be processed unsuccessfully.
2419          */
2420         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2421                                    time_event_response,
2422                                    ARRAY_SIZE(time_event_response),
2423                                    iwl_mvm_rx_aux_roc, te_data);
2424
2425         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2426                                    &aux_roc_req);
2427
2428         if (res) {
2429                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2430                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2431                 goto out_clear_te;
2432         }
2433
2434         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2435         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2436         /* should never fail */
2437         WARN_ON_ONCE(res);
2438
2439         if (res) {
2440  out_clear_te:
2441                 spin_lock_bh(&mvm->time_event_lock);
2442                 iwl_mvm_te_clear_data(mvm, te_data);
2443                 spin_unlock_bh(&mvm->time_event_lock);
2444         }
2445
2446         return res;
2447 }
2448
2449 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2450                        struct ieee80211_vif *vif,
2451                        struct ieee80211_channel *channel,
2452                        int duration,
2453                        enum ieee80211_roc_type type)
2454 {
2455         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2456         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2457         struct cfg80211_chan_def chandef;
2458         struct iwl_mvm_phy_ctxt *phy_ctxt;
2459         int ret, i;
2460
2461         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2462                            duration, type);
2463
2464         switch (vif->type) {
2465         case NL80211_IFTYPE_STATION:
2466                 /* Use aux roc framework (HS20) */
2467                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2468                                                vif, duration);
2469                 return ret;
2470         case NL80211_IFTYPE_P2P_DEVICE:
2471                 /* handle below */
2472                 break;
2473         default:
2474                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2475                 return -EINVAL;
2476         }
2477
2478         mutex_lock(&mvm->mutex);
2479
2480         for (i = 0; i < NUM_PHY_CTX; i++) {
2481                 phy_ctxt = &mvm->phy_ctxts[i];
2482                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2483                         continue;
2484
2485                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2486                         /*
2487                          * Unbind the P2P_DEVICE from the current PHY context,
2488                          * and if the PHY context is not used remove it.
2489                          */
2490                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2491                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2492                                 goto out_unlock;
2493
2494                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2495
2496                         /* Bind the P2P_DEVICE to the current PHY Context */
2497                         mvmvif->phy_ctxt = phy_ctxt;
2498
2499                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2500                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2501                                 goto out_unlock;
2502
2503                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2504                         goto schedule_time_event;
2505                 }
2506         }
2507
2508         /* Need to update the PHY context only if the ROC channel changed */
2509         if (channel == mvmvif->phy_ctxt->channel)
2510                 goto schedule_time_event;
2511
2512         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2513
2514         /*
2515          * Change the PHY context configuration as it is currently referenced
2516          * only by the P2P Device MAC
2517          */
2518         if (mvmvif->phy_ctxt->ref == 1) {
2519                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2520                                                &chandef, 1, 1);
2521                 if (ret)
2522                         goto out_unlock;
2523         } else {
2524                 /*
2525                  * The PHY context is shared with other MACs. Need to remove the
2526                  * P2P Device from the binding, allocate an new PHY context and
2527                  * create a new binding
2528                  */
2529                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2530                 if (!phy_ctxt) {
2531                         ret = -ENOSPC;
2532                         goto out_unlock;
2533                 }
2534
2535                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2536                                                1, 1);
2537                 if (ret) {
2538                         IWL_ERR(mvm, "Failed to change PHY context\n");
2539                         goto out_unlock;
2540                 }
2541
2542                 /* Unbind the P2P_DEVICE from the current PHY context */
2543                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2544                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2545                         goto out_unlock;
2546
2547                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2548
2549                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2550                 mvmvif->phy_ctxt = phy_ctxt;
2551
2552                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2553                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2554                         goto out_unlock;
2555
2556                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2557         }
2558
2559 schedule_time_event:
2560         /* Schedule the time events */
2561         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2562
2563 out_unlock:
2564         mutex_unlock(&mvm->mutex);
2565         IWL_DEBUG_MAC80211(mvm, "leave\n");
2566         return ret;
2567 }
2568
2569 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2570 {
2571         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2572
2573         IWL_DEBUG_MAC80211(mvm, "enter\n");
2574
2575         mutex_lock(&mvm->mutex);
2576         iwl_mvm_stop_p2p_roc(mvm);
2577         mutex_unlock(&mvm->mutex);
2578
2579         IWL_DEBUG_MAC80211(mvm, "leave\n");
2580         return 0;
2581 }
2582
2583 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2584                                  struct ieee80211_chanctx_conf *ctx)
2585 {
2586         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2587         struct iwl_mvm_phy_ctxt *phy_ctxt;
2588         int ret;
2589
2590         lockdep_assert_held(&mvm->mutex);
2591
2592         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2593
2594         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2595         if (!phy_ctxt) {
2596                 ret = -ENOSPC;
2597                 goto out;
2598         }
2599
2600         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2601                                        ctx->rx_chains_static,
2602                                        ctx->rx_chains_dynamic);
2603         if (ret) {
2604                 IWL_ERR(mvm, "Failed to add PHY context\n");
2605                 goto out;
2606         }
2607
2608         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2609         *phy_ctxt_id = phy_ctxt->id;
2610 out:
2611         return ret;
2612 }
2613
2614 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2615                                struct ieee80211_chanctx_conf *ctx)
2616 {
2617         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2618         int ret;
2619
2620         mutex_lock(&mvm->mutex);
2621         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2622         mutex_unlock(&mvm->mutex);
2623
2624         return ret;
2625 }
2626
2627 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2628                                      struct ieee80211_chanctx_conf *ctx)
2629 {
2630         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2631         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2632
2633         lockdep_assert_held(&mvm->mutex);
2634
2635         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2636 }
2637
2638 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2639                                    struct ieee80211_chanctx_conf *ctx)
2640 {
2641         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2642
2643         mutex_lock(&mvm->mutex);
2644         __iwl_mvm_remove_chanctx(mvm, ctx);
2645         mutex_unlock(&mvm->mutex);
2646 }
2647
2648 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2649                                    struct ieee80211_chanctx_conf *ctx,
2650                                    u32 changed)
2651 {
2652         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2653         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2654         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2655
2656         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2657                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2658                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2659                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2660                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2661                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2662                       phy_ctxt->ref, changed))
2663                 return;
2664
2665         mutex_lock(&mvm->mutex);
2666         iwl_mvm_bt_coex_vif_change(mvm);
2667         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2668                                  ctx->rx_chains_static,
2669                                  ctx->rx_chains_dynamic);
2670         mutex_unlock(&mvm->mutex);
2671 }
2672
2673 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2674                                         struct ieee80211_vif *vif,
2675                                         struct ieee80211_chanctx_conf *ctx,
2676                                         bool switching_chanctx)
2677 {
2678         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2679         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2680         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2681         int ret;
2682
2683         lockdep_assert_held(&mvm->mutex);
2684
2685         mvmvif->phy_ctxt = phy_ctxt;
2686
2687         switch (vif->type) {
2688         case NL80211_IFTYPE_AP:
2689                 /* Unless it's a CSA flow we have nothing to do here */
2690                 if (vif->csa_active) {
2691                         mvmvif->ap_ibss_active = true;
2692                         break;
2693                 }
2694         case NL80211_IFTYPE_ADHOC:
2695                 /*
2696                  * The AP binding flow is handled as part of the start_ap flow
2697                  * (in bss_info_changed), similarly for IBSS.
2698                  */
2699                 ret = 0;
2700                 goto out;
2701         case NL80211_IFTYPE_STATION:
2702         case NL80211_IFTYPE_MONITOR:
2703                 break;
2704         default:
2705                 ret = -EINVAL;
2706                 goto out;
2707         }
2708
2709         ret = iwl_mvm_binding_add_vif(mvm, vif);
2710         if (ret)
2711                 goto out;
2712
2713         /*
2714          * Power state must be updated before quotas,
2715          * otherwise fw will complain.
2716          */
2717         iwl_mvm_power_update_mac(mvm);
2718
2719         /* Setting the quota at this stage is only required for monitor
2720          * interfaces. For the other types, the bss_info changed flow
2721          * will handle quota settings.
2722          */
2723         if (vif->type == NL80211_IFTYPE_MONITOR) {
2724                 mvmvif->monitor_active = true;
2725                 ret = iwl_mvm_update_quotas(mvm, NULL);
2726                 if (ret)
2727                         goto out_remove_binding;
2728         }
2729
2730         /* Handle binding during CSA */
2731         if ((vif->type == NL80211_IFTYPE_AP) ||
2732             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2733                 iwl_mvm_update_quotas(mvm, NULL);
2734                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2735         }
2736
2737         goto out;
2738
2739 out_remove_binding:
2740         iwl_mvm_binding_remove_vif(mvm, vif);
2741         iwl_mvm_power_update_mac(mvm);
2742 out:
2743         if (ret)
2744                 mvmvif->phy_ctxt = NULL;
2745         return ret;
2746 }
2747 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2748                                       struct ieee80211_vif *vif,
2749                                       struct ieee80211_chanctx_conf *ctx)
2750 {
2751         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2752         int ret;
2753
2754         mutex_lock(&mvm->mutex);
2755         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2756         mutex_unlock(&mvm->mutex);
2757
2758         return ret;
2759 }
2760
2761 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2762                                            struct ieee80211_vif *vif,
2763                                            struct ieee80211_chanctx_conf *ctx,
2764                                            bool switching_chanctx)
2765 {
2766         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2767         struct ieee80211_vif *disabled_vif = NULL;
2768
2769         lockdep_assert_held(&mvm->mutex);
2770
2771         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2772
2773         switch (vif->type) {
2774         case NL80211_IFTYPE_ADHOC:
2775                 goto out;
2776         case NL80211_IFTYPE_MONITOR:
2777                 mvmvif->monitor_active = false;
2778                 break;
2779         case NL80211_IFTYPE_AP:
2780                 /* This part is triggered only during CSA */
2781                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2782                         goto out;
2783
2784                 /* Set CS bit on all the stations */
2785                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2786
2787                 /* Save blocked iface, the timeout is set on the next beacon */
2788                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2789
2790                 mvmvif->ap_ibss_active = false;
2791                 break;
2792         case NL80211_IFTYPE_STATION:
2793                 if (!switching_chanctx)
2794                         break;
2795
2796                 disabled_vif = vif;
2797
2798                 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2799                 break;
2800         default:
2801                 break;
2802         }
2803
2804         iwl_mvm_update_quotas(mvm, disabled_vif);
2805         iwl_mvm_binding_remove_vif(mvm, vif);
2806
2807 out:
2808         mvmvif->phy_ctxt = NULL;
2809         iwl_mvm_power_update_mac(mvm);
2810 }
2811
2812 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2813                                          struct ieee80211_vif *vif,
2814                                          struct ieee80211_chanctx_conf *ctx)
2815 {
2816         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2817
2818         mutex_lock(&mvm->mutex);
2819         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2820         mutex_unlock(&mvm->mutex);
2821 }
2822
2823 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2824                                       struct ieee80211_vif_chanctx_switch *vifs,
2825                                       int n_vifs,
2826                                       enum ieee80211_chanctx_switch_mode mode)
2827 {
2828         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2829         int ret;
2830
2831         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2832         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2833                 return -EOPNOTSUPP;
2834
2835         mutex_lock(&mvm->mutex);
2836         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2837         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2838
2839         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2840         if (ret) {
2841                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2842                 goto out_reassign;
2843         }
2844
2845         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2846                                            true);
2847         if (ret) {
2848                 IWL_ERR(mvm,
2849                         "failed to assign new_ctx during channel switch\n");
2850                 goto out_remove;
2851         }
2852
2853         /* we don't support TDLS during DCM - can be caused by channel switch */
2854         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2855                 iwl_mvm_teardown_tdls_peers(mvm);
2856
2857         goto out;
2858
2859 out_remove:
2860         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2861
2862 out_reassign:
2863         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2864         if (ret) {
2865                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2866                 goto out_restart;
2867         }
2868
2869         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2870                                            true);
2871         if (ret) {
2872                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2873                 goto out_restart;
2874         }
2875
2876         goto out;
2877
2878 out_restart:
2879         /* things keep failing, better restart the hw */
2880         iwl_mvm_nic_restart(mvm, false);
2881
2882 out:
2883         mutex_unlock(&mvm->mutex);
2884         return ret;
2885 }
2886
2887 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2888                            struct ieee80211_sta *sta,
2889                            bool set)
2890 {
2891         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2892         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2893
2894         if (!mvm_sta || !mvm_sta->vif) {
2895                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2896                 return -EINVAL;
2897         }
2898
2899         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2900 }
2901
2902 #ifdef CONFIG_NL80211_TESTMODE
2903 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2904         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2905         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2906         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2907 };
2908
2909 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2910                                       struct ieee80211_vif *vif,
2911                                       void *data, int len)
2912 {
2913         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2914         int err;
2915         u32 noa_duration;
2916
2917         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2918         if (err)
2919                 return err;
2920
2921         if (!tb[IWL_MVM_TM_ATTR_CMD])
2922                 return -EINVAL;
2923
2924         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2925         case IWL_MVM_TM_CMD_SET_NOA:
2926                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2927                     !vif->bss_conf.enable_beacon ||
2928                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2929                         return -EINVAL;
2930
2931                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2932                 if (noa_duration >= vif->bss_conf.beacon_int)
2933                         return -EINVAL;
2934
2935                 mvm->noa_duration = noa_duration;
2936                 mvm->noa_vif = vif;
2937
2938                 return iwl_mvm_update_quotas(mvm, NULL);
2939         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2940                 /* must be associated client vif - ignore authorized */
2941                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2942                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2943                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2944                         return -EINVAL;
2945
2946                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2947                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2948                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2949         }
2950
2951         return -EOPNOTSUPP;
2952 }
2953
2954 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2955                                     struct ieee80211_vif *vif,
2956                                     void *data, int len)
2957 {
2958         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2959         int err;
2960
2961         mutex_lock(&mvm->mutex);
2962         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2963         mutex_unlock(&mvm->mutex);
2964
2965         return err;
2966 }
2967 #endif
2968
2969 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2970                                           struct ieee80211_vif *vif,
2971                                           struct cfg80211_chan_def *chandef)
2972 {
2973         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2974         struct ieee80211_vif *csa_vif;
2975
2976         mutex_lock(&mvm->mutex);
2977
2978         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2979                                             lockdep_is_held(&mvm->mutex));
2980         if (WARN(csa_vif && csa_vif->csa_active,
2981                  "Another CSA is already in progress"))
2982                 goto out_unlock;
2983
2984         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2985                            chandef->center_freq1);
2986         rcu_assign_pointer(mvm->csa_vif, vif);
2987
2988 out_unlock:
2989         mutex_unlock(&mvm->mutex);
2990 }
2991
2992 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2993                               struct ieee80211_vif *vif, u32 queues, bool drop)
2994 {
2995         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2996         struct iwl_mvm_vif *mvmvif;
2997         struct iwl_mvm_sta *mvmsta;
2998
2999         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3000                 return;
3001
3002         mutex_lock(&mvm->mutex);
3003         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3004         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3005
3006         if (WARN_ON_ONCE(!mvmsta))
3007                 goto done;
3008
3009         if (drop) {
3010                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3011                         IWL_ERR(mvm, "flush request fail\n");
3012         } else {
3013                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3014                                               mvmsta->tfd_queue_msk);
3015         }
3016 done:
3017         mutex_unlock(&mvm->mutex);
3018 }
3019
3020 const struct ieee80211_ops iwl_mvm_hw_ops = {
3021         .tx = iwl_mvm_mac_tx,
3022         .ampdu_action = iwl_mvm_mac_ampdu_action,
3023         .start = iwl_mvm_mac_start,
3024         .restart_complete = iwl_mvm_mac_restart_complete,
3025         .stop = iwl_mvm_mac_stop,
3026         .add_interface = iwl_mvm_mac_add_interface,
3027         .remove_interface = iwl_mvm_mac_remove_interface,
3028         .config = iwl_mvm_mac_config,
3029         .prepare_multicast = iwl_mvm_prepare_multicast,
3030         .configure_filter = iwl_mvm_configure_filter,
3031         .bss_info_changed = iwl_mvm_bss_info_changed,
3032         .hw_scan = iwl_mvm_mac_hw_scan,
3033         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3034         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3035         .sta_state = iwl_mvm_mac_sta_state,
3036         .sta_notify = iwl_mvm_mac_sta_notify,
3037         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3038         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3039         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3040         .sta_rc_update = iwl_mvm_sta_rc_update,
3041         .conf_tx = iwl_mvm_mac_conf_tx,
3042         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3043         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3044         .flush = iwl_mvm_mac_flush,
3045         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3046         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3047         .set_key = iwl_mvm_mac_set_key,
3048         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3049         .remain_on_channel = iwl_mvm_roc,
3050         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3051         .add_chanctx = iwl_mvm_add_chanctx,
3052         .remove_chanctx = iwl_mvm_remove_chanctx,
3053         .change_chanctx = iwl_mvm_change_chanctx,
3054         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3055         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3056         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3057
3058         .start_ap = iwl_mvm_start_ap_ibss,
3059         .stop_ap = iwl_mvm_stop_ap_ibss,
3060         .join_ibss = iwl_mvm_start_ap_ibss,
3061         .leave_ibss = iwl_mvm_stop_ap_ibss,
3062
3063         .set_tim = iwl_mvm_set_tim,
3064
3065         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3066
3067         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3068
3069 #ifdef CONFIG_PM_SLEEP
3070         /* look at d3.c */
3071         .suspend = iwl_mvm_suspend,
3072         .resume = iwl_mvm_resume,
3073         .set_wakeup = iwl_mvm_set_wakeup,
3074         .set_rekey_data = iwl_mvm_set_rekey_data,
3075 #if IS_ENABLED(CONFIG_IPV6)
3076         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3077 #endif
3078         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3079 #endif
3080 };