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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  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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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  32  *
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  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,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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
  84 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  85         {
  86                 .max = 1,
  87                 .types = BIT(NL80211_IFTYPE_STATION),
  88         },
  89         {
  90                 .max = 1,
  91                 .types = BIT(NL80211_IFTYPE_AP) |
  92                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  93                         BIT(NL80211_IFTYPE_P2P_GO),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
  98         },
  99 };
 100
 101 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 102         {
 103                 .num_different_channels = 1,
 104                 .max_interfaces = 3,
 105                 .limits = iwl_mvm_limits,
 106                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 107         },
 108 };
 109
 110 #ifdef CONFIG_PM_SLEEP
 111 static const struct nl80211_wowlan_tcp_data_token_feature
 112 iwl_mvm_wowlan_tcp_token_feature = {
 113         .min_len = 0,
 114         .max_len = 255,
 115         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 116 };
 117
 118 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 119         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 120         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 121                             sizeof(struct ethhdr) -
 122                             sizeof(struct iphdr) -
 123                             sizeof(struct tcphdr),
 124         .data_interval_max = 65535, /* __le16 in API */
 125         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .seq = true,
 130 };
 131 #endif
 132
 133 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 134 /*
 135  * Use the reserved field to indicate magic values.
 136  * these values will only be used internally by the driver,
 137  * and won't make it to the fw (reserved will be 0).
 138  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 139  *      be the vif's ip address. in case there is not a single
 140  *      ip address (0, or more than 1), this attribute will
 141  *      be skipped.
 142  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 143  *      the LSB bytes of the vif's mac address
 144  */
 145 enum {
 146         BC_FILTER_MAGIC_NONE = 0,
 147         BC_FILTER_MAGIC_IP,
 148         BC_FILTER_MAGIC_MAC,
 149 };
 150
 151 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 152         {
 153                 /* arp */
 154                 .discard = 0,
 155                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 156                 .attrs = {
 157                         {
 158                                 /* frame type - arp, hw type - ethernet */
 159                                 .offset_type =
 160                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 161                                 .offset = sizeof(rfc1042_header),
 162                                 .val = cpu_to_be32(0x08060001),
 163                                 .mask = cpu_to_be32(0xffffffff),
 164                         },
 165                         {
 166                                 /* arp dest ip */
 167                                 .offset_type =
 168                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 169                                 .offset = sizeof(rfc1042_header) + 2 +
 170                                           sizeof(struct arphdr) +
 171                                           ETH_ALEN + sizeof(__be32) +
 172                                           ETH_ALEN,
 173                                 .mask = cpu_to_be32(0xffffffff),
 174                                 /* mark it as special field */
 175                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 176                         },
 177                 },
 178         },
 179         {
 180                 /* dhcp offer bcast */
 181                 .discard = 0,
 182                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 183                 .attrs = {
 184                         {
 185                                 /* udp dest port - 68 (bootp client)*/
 186                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 187                                 .offset = offsetof(struct udphdr, dest),
 188                                 .val = cpu_to_be32(0x00440000),
 189                                 .mask = cpu_to_be32(0xffff0000),
 190                         },
 191                         {
 192                                 /* dhcp - lsb bytes of client hw address */
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = 38,
 195                                 .mask = cpu_to_be32(0xffffffff),
 196                                 /* mark it as special field */
 197                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 198                         },
 199                 },
 200         },
 201         /* last filter must be empty */
 202         {},
 203 };
 204 #endif
 205
 206 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 207 {
 208         if (!iwl_mvm_is_d0i3_supported(mvm))
 209                 return;
 210
 211         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 212         WARN_ON(test_and_set_bit(ref_type, mvm->ref_bitmap));
 213         iwl_trans_ref(mvm->trans);
 214 }
 215
 216 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 217 {
 218         if (!iwl_mvm_is_d0i3_supported(mvm))
 219                 return;
 220
 221         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 222         WARN_ON(!test_and_clear_bit(ref_type, mvm->ref_bitmap));
 223         iwl_trans_unref(mvm->trans);
 224 }
 225
 226 static void
 227 iwl_mvm_unref_all_except(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref)
 228 {
 229         int i;
 230
 231         if (!iwl_mvm_is_d0i3_supported(mvm))
 232                 return;
 233
 234         for_each_set_bit(i, mvm->ref_bitmap, IWL_MVM_REF_COUNT) {
 235                 if (ref == i)
 236                         continue;
 237
 238                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d\n", i);
 239                 clear_bit(i, mvm->ref_bitmap);
 240                 iwl_trans_unref(mvm->trans);
 241         }
 242 }
 243
 244 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 245 {
 246         int i;
 247
 248         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 249         for (i = 0; i < NUM_PHY_CTX; i++) {
 250                 mvm->phy_ctxts[i].id = i;
 251                 mvm->phy_ctxts[i].ref = 0;
 252         }
 253 }
 254
 255 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 256 {
 257         /* we create the 802.11 header and SSID element */
 258         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 259                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 260         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 261 }
 262
 263 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 264 {
 265         struct ieee80211_hw *hw = mvm->hw;
 266         int num_mac, ret, i;
 267
 268         /* Tell mac80211 our characteristics */
 269         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 270                     IEEE80211_HW_SPECTRUM_MGMT |
 271                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 272                     IEEE80211_HW_QUEUE_CONTROL |
 273                     IEEE80211_HW_WANT_MONITOR_VIF |
 274                     IEEE80211_HW_SUPPORTS_PS |
 275                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 276                     IEEE80211_HW_AMPDU_AGGREGATION |
 277                     IEEE80211_HW_TIMING_BEACON_ONLY |
 278                     IEEE80211_HW_CONNECTION_MONITOR |
 279                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 280                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 281
 282         hw->queues = mvm->first_agg_queue;
 283         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 284         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 285                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 286         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 287         hw->rate_control_algorithm = "iwl-mvm-rs";
 288
 289         /*
 290          * Enable 11w if advertised by firmware and software crypto
 291          * is not enabled (as the firmware will interpret some mgmt
 292          * packets, so enabling it with software crypto isn't safe)
 293          */
 294         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 295             !iwlwifi_mod_params.sw_crypto)
 296                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 297
 298         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 299             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 300             !iwlwifi_mod_params.uapsd_disable) {
 301                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 302                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 303                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 304         }
 305
 306         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 307             !iwlwifi_mod_params.uapsd_disable) {
 308                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 309                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 310                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 311         }
 312
 313         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 314         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 315         hw->chanctx_data_size = sizeof(u16);
 316
 317         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 318                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 319                 BIT(NL80211_IFTYPE_AP) |
 320                 BIT(NL80211_IFTYPE_P2P_GO) |
 321                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 322                 BIT(NL80211_IFTYPE_ADHOC);
 323
 324         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 325         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 326                                        REGULATORY_DISABLE_BEACON_HINTS;
 327
 328         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 329                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 330
 331         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 332                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 333
 334         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 335         hw->wiphy->n_iface_combinations =
 336                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 337
 338         hw->wiphy->max_remain_on_channel_duration = 10000;
 339         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 340
 341         /* Extract MAC address */
 342         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 343         hw->wiphy->addresses = mvm->addresses;
 344         hw->wiphy->n_addresses = 1;
 345
 346         /* Extract additional MAC addresses if available */
 347         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 348                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 349
 350         for (i = 1; i < num_mac; i++) {
 351                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 352                        ETH_ALEN);
 353                 mvm->addresses[i].addr[5]++;
 354                 hw->wiphy->n_addresses++;
 355         }
 356
 357         iwl_mvm_reset_phy_ctxts(mvm);
 358
 359         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 360
 361         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 362
 363         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 364                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 365                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 366         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 367                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 368                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 369
 370         hw->wiphy->hw_version = mvm->trans->hw_id;
 371
 372         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 373                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 374         else
 375                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 376
 377         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 378         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 379         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 380         /* we create the 802.11 header and zero length SSID IE. */
 381         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 382
 383         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 384                                NL80211_FEATURE_P2P_GO_OPPPS;
 385
 386         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 387
 388         /* currently FW API supports only one optional cipher scheme */
 389         if (mvm->fw->cs[0].cipher) {
 390                 mvm->hw->n_cipher_schemes = 1;
 391                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 392         }
 393
 394 #ifdef CONFIG_PM_SLEEP
 395         if (iwl_mvm_is_d0i3_supported(mvm) &&
 396             device_can_wakeup(mvm->trans->dev)) {
 397                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 398                 hw->wiphy->wowlan = &mvm->wowlan;
 399         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 400             mvm->trans->ops->d3_suspend &&
 401             mvm->trans->ops->d3_resume &&
 402             device_can_wakeup(mvm->trans->dev)) {
 403                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 404                                     WIPHY_WOWLAN_DISCONNECT |
 405                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 406                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 407                 if (!iwlwifi_mod_params.sw_crypto)
 408                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 409                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 410                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 411
 412                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 413                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 414                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 415                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 416                 hw->wiphy->wowlan = &mvm->wowlan;
 417         }
 418 #endif
 419
 420 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 421         /* assign default bcast filtering configuration */
 422         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 423 #endif
 424
 425         ret = iwl_mvm_leds_init(mvm);
 426         if (ret)
 427                 return ret;
 428
 429         ret = ieee80211_register_hw(mvm->hw);
 430         if (ret)
 431                 iwl_mvm_leds_exit(mvm);
 432
 433         return ret;
 434 }
 435
 436 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 437                              struct ieee80211_sta *sta,
 438                              struct sk_buff *skb)
 439 {
 440         struct iwl_mvm_sta *mvmsta;
 441         bool defer = false;
 442
 443         /*
 444          * double check the IN_D0I3 flag both before and after
 445          * taking the spinlock, in order to prevent taking
 446          * the spinlock when not needed.
 447          */
 448         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 449                 return false;
 450
 451         spin_lock(&mvm->d0i3_tx_lock);
 452         /*
 453          * testing the flag again ensures the skb dequeue
 454          * loop (on d0i3 exit) hasn't run yet.
 455          */
 456         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 457                 goto out;
 458
 459         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 460         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 461             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 462                 goto out;
 463
 464         __skb_queue_tail(&mvm->d0i3_tx, skb);
 465         ieee80211_stop_queues(mvm->hw);
 466
 467         /* trigger wakeup */
 468         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 469         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 470
 471         defer = true;
 472 out:
 473         spin_unlock(&mvm->d0i3_tx_lock);
 474         return defer;
 475 }
 476
 477 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 478                            struct ieee80211_tx_control *control,
 479                            struct sk_buff *skb)
 480 {
 481         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 482         struct ieee80211_sta *sta = control->sta;
 483         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 484         struct ieee80211_hdr *hdr = (void *)skb->data;
 485
 486         if (iwl_mvm_is_radio_killed(mvm)) {
 487                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 488                 goto drop;
 489         }
 490
 491         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 492             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 493                 goto drop;
 494
 495         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 496         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 497                      ieee80211_is_mgmt(hdr->frame_control) &&
 498                      !ieee80211_is_deauth(hdr->frame_control) &&
 499                      !ieee80211_is_disassoc(hdr->frame_control) &&
 500                      !ieee80211_is_action(hdr->frame_control)))
 501                 sta = NULL;
 502
 503         if (sta) {
 504                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 505                         return;
 506                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 507                         goto drop;
 508                 return;
 509         }
 510
 511         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 512                 goto drop;
 513         return;
 514  drop:
 515         ieee80211_free_txskb(hw, skb);
 516 }
 517
 518 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 519 {
 520         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 521                 return false;
 522         return true;
 523 }
 524
 525 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 526 {
 527         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 528                 return false;
 529         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 530                 return true;
 531
 532         /* enabled by default */
 533         return true;
 534 }
 535
 536 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 537                                     struct ieee80211_vif *vif,
 538                                     enum ieee80211_ampdu_mlme_action action,
 539                                     struct ieee80211_sta *sta, u16 tid,
 540                                     u16 *ssn, u8 buf_size)
 541 {
 542         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 543         int ret;
 544         bool tx_agg_ref = false;
 545
 546         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 547                      sta->addr, tid, action);
 548
 549         if (!(mvm->nvm_data->sku_cap_11n_enable))
 550                 return -EACCES;
 551
 552         /* return from D0i3 before starting a new Tx aggregation */
 553         switch (action) {
 554         case IEEE80211_AMPDU_TX_START:
 555         case IEEE80211_AMPDU_TX_STOP_CONT:
 556         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 557         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 558         case IEEE80211_AMPDU_TX_OPERATIONAL:
 559                 iwl_mvm_ref(mvm, IWL_MVM_REF_TX_AGG);
 560                 tx_agg_ref = true;
 561
 562                 /*
 563                  * for tx start, wait synchronously until D0i3 exit to
 564                  * get the correct sequence number for the tid.
 565                  * additionally, some other ampdu actions use direct
 566                  * target access, which is not handled automatically
 567                  * by the trans layer (unlike commands), so wait for
 568                  * d0i3 exit in these cases as well.
 569                  */
 570                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 571                           !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status), HZ)) {
 572                         WARN_ON_ONCE(1);
 573                         iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 574                         return -EIO;
 575                 }
 576                 break;
 577         default:
 578                 break;
 579         }
 580
 581         mutex_lock(&mvm->mutex);
 582
 583         switch (action) {
 584         case IEEE80211_AMPDU_RX_START:
 585                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 586                         ret = -EINVAL;
 587                         break;
 588                 }
 589                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 590                 break;
 591         case IEEE80211_AMPDU_RX_STOP:
 592                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 593                 break;
 594         case IEEE80211_AMPDU_TX_START:
 595                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 596                         ret = -EINVAL;
 597                         break;
 598                 }
 599                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 600                 break;
 601         case IEEE80211_AMPDU_TX_STOP_CONT:
 602                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 603                 break;
 604         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 605         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 606                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 607                 break;
 608         case IEEE80211_AMPDU_TX_OPERATIONAL:
 609                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 610                 break;
 611         default:
 612                 WARN_ON_ONCE(1);
 613                 ret = -EINVAL;
 614                 break;
 615         }
 616         mutex_unlock(&mvm->mutex);
 617
 618         /*
 619          * If the tid is marked as started, we won't use it for offloaded
 620          * traffic on the next D0i3 entry. It's safe to unref.
 621          */
 622         if (tx_agg_ref)
 623                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 624
 625         return ret;
 626 }
 627
 628 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 629                                      struct ieee80211_vif *vif)
 630 {
 631         struct iwl_mvm *mvm = data;
 632         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 633
 634         mvmvif->uploaded = false;
 635         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 636
 637         /* does this make sense at all? */
 638         mvmvif->color++;
 639
 640         spin_lock_bh(&mvm->time_event_lock);
 641         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 642         spin_unlock_bh(&mvm->time_event_lock);
 643
 644         mvmvif->phy_ctxt = NULL;
 645 }
 646
 647 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 648 {
 649 #ifdef CONFIG_IWLWIFI_DEBUGFS
 650         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 651
 652         iwl_mvm_fw_error_dump(mvm);
 653
 654         /* notify the userspace about the error we had */
 655         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 656 #endif
 657
 658         iwl_trans_stop_device(mvm->trans);
 659
 660         mvm->scan_status = IWL_MVM_SCAN_NONE;
 661
 662         /* just in case one was running */
 663         ieee80211_remain_on_channel_expired(mvm->hw);
 664
 665         ieee80211_iterate_active_interfaces_atomic(
 666                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 667                 iwl_mvm_cleanup_iterator, mvm);
 668
 669         mvm->p2p_device_vif = NULL;
 670         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 671
 672         iwl_mvm_reset_phy_ctxts(mvm);
 673         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 674         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 675
 676         ieee80211_wake_queues(mvm->hw);
 677
 678         /* cleanup all stale references (scan, roc), but keep the
 679          * ucode_down ref until reconfig is complete */
 680         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 681
 682         mvm->vif_count = 0;
 683         mvm->rx_ba_sessions = 0;
 684 }
 685
 686 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 687 {
 688         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 689         int ret;
 690
 691         mutex_lock(&mvm->mutex);
 692
 693         /* Clean up some internal and mac80211 state on restart */
 694         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 695                 iwl_mvm_restart_cleanup(mvm);
 696
 697         ret = iwl_mvm_up(mvm);
 698         mutex_unlock(&mvm->mutex);
 699
 700         return ret;
 701 }
 702
 703 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 704 {
 705         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 706         int ret;
 707
 708         mutex_lock(&mvm->mutex);
 709
 710         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 711         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 712         ret = iwl_mvm_update_quotas(mvm, NULL);
 713         if (ret)
 714                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 715                         ret);
 716
 717         /* allow transport/FW low power modes */
 718         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 719
 720         mutex_unlock(&mvm->mutex);
 721 }
 722
 723 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 724 {
 725         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 726
 727         flush_work(&mvm->d0i3_exit_work);
 728         flush_work(&mvm->async_handlers_wk);
 729
 730         mutex_lock(&mvm->mutex);
 731
 732         /* disallow low power states when the FW is down */
 733         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 734
 735         /* async_handlers_wk is now blocked */
 736
 737         /*
 738          * The work item could be running or queued if the
 739          * ROC time event stops just as we get here.
 740          */
 741         cancel_work_sync(&mvm->roc_done_wk);
 742
 743         iwl_trans_stop_device(mvm->trans);
 744
 745         iwl_mvm_async_handlers_purge(mvm);
 746         /* async_handlers_list is empty and will stay empty: HW is stopped */
 747
 748         /* the fw is stopped, the aux sta is dead: clean up driver state */
 749         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 750
 751         mutex_unlock(&mvm->mutex);
 752
 753         /*
 754          * The worker might have been waiting for the mutex, let it run and
 755          * discover that its list is now empty.
 756          */
 757         cancel_work_sync(&mvm->async_handlers_wk);
 758 }
 759
 760 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 761 {
 762         u16 i;
 763
 764         lockdep_assert_held(&mvm->mutex);
 765
 766         for (i = 0; i < NUM_PHY_CTX; i++)
 767                 if (!mvm->phy_ctxts[i].ref)
 768                         return &mvm->phy_ctxts[i];
 769
 770         IWL_ERR(mvm, "No available PHY context\n");
 771         return NULL;
 772 }
 773
 774 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 775                                 s8 tx_power)
 776 {
 777         /* FW is in charge of regulatory enforcement */
 778         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 779                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 780                 .pwr_restriction = cpu_to_le16(tx_power),
 781         };
 782
 783         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 784                                     sizeof(reduce_txpwr_cmd),
 785                                     &reduce_txpwr_cmd);
 786 }
 787
 788 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 789                                      struct ieee80211_vif *vif)
 790 {
 791         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 792         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 793         int ret;
 794
 795         /*
 796          * Not much to do here. The stack will not allow interface
 797          * types or combinations that we didn't advertise, so we
 798          * don't really have to check the types.
 799          */
 800
 801         mutex_lock(&mvm->mutex);
 802
 803         /* Allocate resources for the MAC context, and add it to the fw  */
 804         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 805         if (ret)
 806                 goto out_unlock;
 807
 808         /* Counting number of interfaces is needed for legacy PM */
 809         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 810                 mvm->vif_count++;
 811
 812         /*
 813          * The AP binding flow can be done only after the beacon
 814          * template is configured (which happens only in the mac80211
 815          * start_ap() flow), and adding the broadcast station can happen
 816          * only after the binding.
 817          * In addition, since modifying the MAC before adding a bcast
 818          * station is not allowed by the FW, delay the adding of MAC context to
 819          * the point where we can also add the bcast station.
 820          * In short: there's not much we can do at this point, other than
 821          * allocating resources :)
 822          */
 823         if (vif->type == NL80211_IFTYPE_AP ||
 824             vif->type == NL80211_IFTYPE_ADHOC) {
 825                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 826                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 827                                                qmask,
 828                                                ieee80211_vif_type_p2p(vif));
 829                 if (ret) {
 830                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 831                         goto out_release;
 832                 }
 833
 834                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 835                 goto out_unlock;
 836         }
 837
 838         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 839         if (ret)
 840                 goto out_release;
 841
 842         ret = iwl_mvm_power_update_mac(mvm);
 843         if (ret)
 844                 goto out_release;
 845
 846         /* beacon filtering */
 847         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 848         if (ret)
 849                 goto out_remove_mac;
 850
 851         if (!mvm->bf_allowed_vif &&
 852             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 853                 mvm->bf_allowed_vif = mvmvif;
 854                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 855                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 856         }
 857
 858         /*
 859          * P2P_DEVICE interface does not have a channel context assigned to it,
 860          * so a dedicated PHY context is allocated to it and the corresponding
 861          * MAC context is bound to it at this stage.
 862          */
 863         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 864
 865                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 866                 if (!mvmvif->phy_ctxt) {
 867                         ret = -ENOSPC;
 868                         goto out_free_bf;
 869                 }
 870
 871                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 872                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 873                 if (ret)
 874                         goto out_unref_phy;
 875
 876                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 877                 if (ret)
 878                         goto out_unbind;
 879
 880                 /* Save a pointer to p2p device vif, so it can later be used to
 881                  * update the p2p device MAC when a GO is started/stopped */
 882                 mvm->p2p_device_vif = vif;
 883         }
 884
 885         iwl_mvm_vif_dbgfs_register(mvm, vif);
 886         goto out_unlock;
 887
 888  out_unbind:
 889         iwl_mvm_binding_remove_vif(mvm, vif);
 890  out_unref_phy:
 891         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 892  out_free_bf:
 893         if (mvm->bf_allowed_vif == mvmvif) {
 894                 mvm->bf_allowed_vif = NULL;
 895                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 896                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 897         }
 898  out_remove_mac:
 899         mvmvif->phy_ctxt = NULL;
 900         iwl_mvm_mac_ctxt_remove(mvm, vif);
 901  out_release:
 902         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 903                 mvm->vif_count--;
 904
 905         iwl_mvm_mac_ctxt_release(mvm, vif);
 906  out_unlock:
 907         mutex_unlock(&mvm->mutex);
 908
 909         return ret;
 910 }
 911
 912 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 913                                         struct ieee80211_vif *vif)
 914 {
 915         u32 tfd_msk = 0, ac;
 916
 917         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 918                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 919                         tfd_msk |= BIT(vif->hw_queue[ac]);
 920
 921         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 922                 tfd_msk |= BIT(vif->cab_queue);
 923
 924         if (tfd_msk) {
 925                 mutex_lock(&mvm->mutex);
 926                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 927                 mutex_unlock(&mvm->mutex);
 928         }
 929
 930         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 931                 /*
 932                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 933                  * We assume here that all the packets sent to the OFFCHANNEL
 934                  * queue are sent in ROC session.
 935                  */
 936                 flush_work(&mvm->roc_done_wk);
 937         } else {
 938                 /*
 939                  * By now, all the AC queues are empty. The AGG queues are
 940                  * empty too. We already got all the Tx responses for all the
 941                  * packets in the queues. The drain work can have been
 942                  * triggered. Flush it.
 943                  */
 944                 flush_work(&mvm->sta_drained_wk);
 945         }
 946 }
 947
 948 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 949                                          struct ieee80211_vif *vif)
 950 {
 951         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 952         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 953
 954         iwl_mvm_prepare_mac_removal(mvm, vif);
 955
 956         mutex_lock(&mvm->mutex);
 957
 958         if (mvm->bf_allowed_vif == mvmvif) {
 959                 mvm->bf_allowed_vif = NULL;
 960                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 961                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 962         }
 963
 964         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 965
 966         /*
 967          * For AP/GO interface, the tear down of the resources allocated to the
 968          * interface is be handled as part of the stop_ap flow.
 969          */
 970         if (vif->type == NL80211_IFTYPE_AP ||
 971             vif->type == NL80211_IFTYPE_ADHOC) {
 972 #ifdef CONFIG_NL80211_TESTMODE
 973                 if (vif == mvm->noa_vif) {
 974                         mvm->noa_vif = NULL;
 975                         mvm->noa_duration = 0;
 976                 }
 977 #endif
 978                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 979                 goto out_release;
 980         }
 981
 982         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 983                 mvm->p2p_device_vif = NULL;
 984                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 985                 iwl_mvm_binding_remove_vif(mvm, vif);
 986                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 987                 mvmvif->phy_ctxt = NULL;
 988         }
 989
 990         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 991                 mvm->vif_count--;
 992
 993         iwl_mvm_power_update_mac(mvm);
 994         iwl_mvm_mac_ctxt_remove(mvm, vif);
 995
 996 out_release:
 997         iwl_mvm_mac_ctxt_release(mvm, vif);
 998         mutex_unlock(&mvm->mutex);
 999 }
1000
1001 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1002 {
1003         return 0;
1004 }
1005
1006 struct iwl_mvm_mc_iter_data {
1007         struct iwl_mvm *mvm;
1008         int port_id;
1009 };
1010
1011 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1012                                       struct ieee80211_vif *vif)
1013 {
1014         struct iwl_mvm_mc_iter_data *data = _data;
1015         struct iwl_mvm *mvm = data->mvm;
1016         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1017         int ret, len;
1018
1019         /* if we don't have free ports, mcast frames will be dropped */
1020         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1021                 return;
1022
1023         if (vif->type != NL80211_IFTYPE_STATION ||
1024             !vif->bss_conf.assoc)
1025                 return;
1026
1027         cmd->port_id = data->port_id++;
1028         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1029         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1030
1031         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1032         if (ret)
1033                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1034 }
1035
1036 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1037 {
1038         struct iwl_mvm_mc_iter_data iter_data = {
1039                 .mvm = mvm,
1040         };
1041
1042         lockdep_assert_held(&mvm->mutex);
1043
1044         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1045                 return;
1046
1047         ieee80211_iterate_active_interfaces_atomic(
1048                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1049                 iwl_mvm_mc_iface_iterator, &iter_data);
1050 }
1051
1052 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1053                                      struct netdev_hw_addr_list *mc_list)
1054 {
1055         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1056         struct iwl_mcast_filter_cmd *cmd;
1057         struct netdev_hw_addr *addr;
1058         int addr_count = netdev_hw_addr_list_count(mc_list);
1059         bool pass_all = false;
1060         int len;
1061
1062         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1063                 pass_all = true;
1064                 addr_count = 0;
1065         }
1066
1067         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1068         cmd = kzalloc(len, GFP_ATOMIC);
1069         if (!cmd)
1070                 return 0;
1071
1072         if (pass_all) {
1073                 cmd->pass_all = 1;
1074                 return (u64)(unsigned long)cmd;
1075         }
1076
1077         netdev_hw_addr_list_for_each(addr, mc_list) {
1078                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1079                                    cmd->count, addr->addr);
1080                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1081                        addr->addr, ETH_ALEN);
1082                 cmd->count++;
1083         }
1084
1085         return (u64)(unsigned long)cmd;
1086 }
1087
1088 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1089                                      unsigned int changed_flags,
1090                                      unsigned int *total_flags,
1091                                      u64 multicast)
1092 {
1093         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1094         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1095
1096         mutex_lock(&mvm->mutex);
1097
1098         /* replace previous configuration */
1099         kfree(mvm->mcast_filter_cmd);
1100         mvm->mcast_filter_cmd = cmd;
1101
1102         if (!cmd)
1103                 goto out;
1104
1105         iwl_mvm_recalc_multicast(mvm);
1106 out:
1107         mutex_unlock(&mvm->mutex);
1108         *total_flags = 0;
1109 }
1110
1111 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1112 struct iwl_bcast_iter_data {
1113         struct iwl_mvm *mvm;
1114         struct iwl_bcast_filter_cmd *cmd;
1115         u8 current_filter;
1116 };
1117
1118 static void
1119 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1120                          const struct iwl_fw_bcast_filter *in_filter,
1121                          struct iwl_fw_bcast_filter *out_filter)
1122 {
1123         struct iwl_fw_bcast_filter_attr *attr;
1124         int i;
1125
1126         memcpy(out_filter, in_filter, sizeof(*out_filter));
1127
1128         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1129                 attr = &out_filter->attrs[i];
1130
1131                 if (!attr->mask)
1132                         break;
1133
1134                 switch (attr->reserved1) {
1135                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1136                         if (vif->bss_conf.arp_addr_cnt != 1) {
1137                                 attr->mask = 0;
1138                                 continue;
1139                         }
1140
1141                         attr->val = vif->bss_conf.arp_addr_list[0];
1142                         break;
1143                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1144                         attr->val = *(__be32 *)&vif->addr[2];
1145                         break;
1146                 default:
1147                         break;
1148                 }
1149                 attr->reserved1 = 0;
1150                 out_filter->num_attrs++;
1151         }
1152 }
1153
1154 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1155                                           struct ieee80211_vif *vif)
1156 {
1157         struct iwl_bcast_iter_data *data = _data;
1158         struct iwl_mvm *mvm = data->mvm;
1159         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1160         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1161         struct iwl_fw_bcast_mac *bcast_mac;
1162         int i;
1163
1164         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1165                 return;
1166
1167         bcast_mac = &cmd->macs[mvmvif->id];
1168
1169         /*
1170          * enable filtering only for associated stations, but not for P2P
1171          * Clients
1172          */
1173         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1174             !vif->bss_conf.assoc)
1175                 return;
1176
1177         bcast_mac->default_discard = 1;
1178
1179         /* copy all configured filters */
1180         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1181                 /*
1182                  * Make sure we don't exceed our filters limit.
1183                  * if there is still a valid filter to be configured,
1184                  * be on the safe side and just allow bcast for this mac.
1185                  */
1186                 if (WARN_ON_ONCE(data->current_filter >=
1187                                  ARRAY_SIZE(cmd->filters))) {
1188                         bcast_mac->default_discard = 0;
1189                         bcast_mac->attached_filters = 0;
1190                         break;
1191                 }
1192
1193                 iwl_mvm_set_bcast_filter(vif,
1194                                          &mvm->bcast_filters[i],
1195                                          &cmd->filters[data->current_filter]);
1196
1197                 /* skip current filter if it contains no attributes */
1198                 if (!cmd->filters[data->current_filter].num_attrs)
1199                         continue;
1200
1201                 /* attach the filter to current mac */
1202                 bcast_mac->attached_filters |=
1203                                 cpu_to_le16(BIT(data->current_filter));
1204
1205                 data->current_filter++;
1206         }
1207 }
1208
1209 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1210                                     struct iwl_bcast_filter_cmd *cmd)
1211 {
1212         struct iwl_bcast_iter_data iter_data = {
1213                 .mvm = mvm,
1214                 .cmd = cmd,
1215         };
1216
1217         memset(cmd, 0, sizeof(*cmd));
1218         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1219         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1220
1221 #ifdef CONFIG_IWLWIFI_DEBUGFS
1222         /* use debugfs filters/macs if override is configured */
1223         if (mvm->dbgfs_bcast_filtering.override) {
1224                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1225                        sizeof(cmd->filters));
1226                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1227                        sizeof(cmd->macs));
1228                 return true;
1229         }
1230 #endif
1231
1232         /* if no filters are configured, do nothing */
1233         if (!mvm->bcast_filters)
1234                 return false;
1235
1236         /* configure and attach these filters for each associated sta vif */
1237         ieee80211_iterate_active_interfaces(
1238                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1239                 iwl_mvm_bcast_filter_iterator, &iter_data);
1240
1241         return true;
1242 }
1243 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1244                                           struct ieee80211_vif *vif)
1245 {
1246         struct iwl_bcast_filter_cmd cmd;
1247
1248         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1249                 return 0;
1250
1251         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1252                 return 0;
1253
1254         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1255                                     sizeof(cmd), &cmd);
1256 }
1257 #else
1258 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1259                                                  struct ieee80211_vif *vif)
1260 {
1261         return 0;
1262 }
1263 #endif
1264
1265 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1266                                              struct ieee80211_vif *vif,
1267                                              struct ieee80211_bss_conf *bss_conf,
1268                                              u32 changes)
1269 {
1270         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1271         int ret;
1272
1273         /*
1274          * Re-calculate the tsf id, as the master-slave relations depend on the
1275          * beacon interval, which was not known when the station interface was
1276          * added.
1277          */
1278         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1279                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1280
1281         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1282         if (ret)
1283                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1284
1285         if (changes & BSS_CHANGED_ASSOC) {
1286                 if (bss_conf->assoc) {
1287                         /* add quota for this interface */
1288                         ret = iwl_mvm_update_quotas(mvm, vif);
1289                         if (ret) {
1290                                 IWL_ERR(mvm, "failed to update quotas\n");
1291                                 return;
1292                         }
1293
1294                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1295                                      &mvm->status)) {
1296                                 /*
1297                                  * If we're restarting then the firmware will
1298                                  * obviously have lost synchronisation with
1299                                  * the AP. It will attempt to synchronise by
1300                                  * itself, but we can make it more reliable by
1301                                  * scheduling a session protection time event.
1302                                  *
1303                                  * The firmware needs to receive a beacon to
1304                                  * catch up with synchronisation, use 110% of
1305                                  * the beacon interval.
1306                                  *
1307                                  * Set a large maximum delay to allow for more
1308                                  * than a single interface.
1309                                  */
1310                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1311                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1312                                                         5 * dur);
1313                         }
1314
1315                         iwl_mvm_sf_update(mvm, vif, false);
1316                         iwl_mvm_power_vif_assoc(mvm, vif);
1317                         if (vif->p2p)
1318                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1319                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1320                         /*
1321                          * If update fails - SF might be running in associated
1322                          * mode while disassociated - which is forbidden.
1323                          */
1324                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1325                                   "Failed to update SF upon disassociation\n");
1326
1327                         /* remove AP station now that the MAC is unassoc */
1328                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1329                         if (ret)
1330                                 IWL_ERR(mvm, "failed to remove AP station\n");
1331
1332                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1333                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1334                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1335                         /* remove quota for this interface */
1336                         ret = iwl_mvm_update_quotas(mvm, NULL);
1337                         if (ret)
1338                                 IWL_ERR(mvm, "failed to update quotas\n");
1339
1340                         if (vif->p2p)
1341                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1342                 }
1343
1344                 iwl_mvm_recalc_multicast(mvm);
1345                 iwl_mvm_configure_bcast_filter(mvm, vif);
1346
1347                 /* reset rssi values */
1348                 mvmvif->bf_data.ave_beacon_signal = 0;
1349
1350                 iwl_mvm_bt_coex_vif_change(mvm);
1351                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1352                                     IEEE80211_SMPS_AUTOMATIC);
1353         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1354                 /*
1355                  * We received a beacon _after_ association so
1356                  * remove the session protection.
1357                  */
1358                 iwl_mvm_remove_time_event(mvm, mvmvif,
1359                                           &mvmvif->time_event_data);
1360                 iwl_mvm_sf_update(mvm, vif, false);
1361                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1362         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1363                               BSS_CHANGED_QOS)) {
1364                 ret = iwl_mvm_power_update_mac(mvm);
1365                 if (ret)
1366                         IWL_ERR(mvm, "failed to update power mode\n");
1367         }
1368         if (changes & BSS_CHANGED_TXPOWER) {
1369                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1370                                 bss_conf->txpower);
1371                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1372         }
1373
1374         if (changes & BSS_CHANGED_CQM) {
1375                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1376                 /* reset cqm events tracking */
1377                 mvmvif->bf_data.last_cqm_event = 0;
1378                 if (mvmvif->bf_data.bf_enabled) {
1379                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1380                         if (ret)
1381                                 IWL_ERR(mvm,
1382                                         "failed to update CQM thresholds\n");
1383                 }
1384         }
1385
1386         if (changes & BSS_CHANGED_ARP_FILTER) {
1387                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1388                 iwl_mvm_configure_bcast_filter(mvm, vif);
1389         }
1390 }
1391
1392 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1393                                  struct ieee80211_vif *vif)
1394 {
1395         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1396         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1397         int ret;
1398
1399         mutex_lock(&mvm->mutex);
1400
1401         /* Send the beacon template */
1402         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1403         if (ret)
1404                 goto out_unlock;
1405
1406         /*
1407          * Re-calculate the tsf id, as the master-slave relations depend on the
1408          * beacon interval, which was not known when the AP interface was added.
1409          */
1410         if (vif->type == NL80211_IFTYPE_AP)
1411                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1412
1413         /* Add the mac context */
1414         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1415         if (ret)
1416                 goto out_unlock;
1417
1418         /* Perform the binding */
1419         ret = iwl_mvm_binding_add_vif(mvm, vif);
1420         if (ret)
1421                 goto out_remove;
1422
1423         /* Send the bcast station. At this stage the TBTT and DTIM time events
1424          * are added and applied to the scheduler */
1425         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1426         if (ret)
1427                 goto out_unbind;
1428
1429         /* must be set before quota calculations */
1430         mvmvif->ap_ibss_active = true;
1431
1432         /* power updated needs to be done before quotas */
1433         iwl_mvm_power_update_mac(mvm);
1434
1435         ret = iwl_mvm_update_quotas(mvm, vif);
1436         if (ret)
1437                 goto out_quota_failed;
1438
1439         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1440         if (vif->p2p && mvm->p2p_device_vif)
1441                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1442
1443         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1444
1445         iwl_mvm_bt_coex_vif_change(mvm);
1446
1447         mutex_unlock(&mvm->mutex);
1448         return 0;
1449
1450 out_quota_failed:
1451         iwl_mvm_power_update_mac(mvm);
1452         mvmvif->ap_ibss_active = false;
1453         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1454 out_unbind:
1455         iwl_mvm_binding_remove_vif(mvm, vif);
1456 out_remove:
1457         iwl_mvm_mac_ctxt_remove(mvm, vif);
1458 out_unlock:
1459         mutex_unlock(&mvm->mutex);
1460         return ret;
1461 }
1462
1463 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1464                                  struct ieee80211_vif *vif)
1465 {
1466         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1467         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1468
1469         iwl_mvm_prepare_mac_removal(mvm, vif);
1470
1471         mutex_lock(&mvm->mutex);
1472
1473         mvmvif->ap_ibss_active = false;
1474
1475         iwl_mvm_bt_coex_vif_change(mvm);
1476
1477         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1478
1479         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1480         if (vif->p2p && mvm->p2p_device_vif)
1481                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1482
1483         iwl_mvm_update_quotas(mvm, NULL);
1484         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1485         iwl_mvm_binding_remove_vif(mvm, vif);
1486
1487         iwl_mvm_power_update_mac(mvm);
1488
1489         iwl_mvm_mac_ctxt_remove(mvm, vif);
1490
1491         mutex_unlock(&mvm->mutex);
1492 }
1493
1494 static void
1495 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1496                                  struct ieee80211_vif *vif,
1497                                  struct ieee80211_bss_conf *bss_conf,
1498                                  u32 changes)
1499 {
1500         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1501
1502         /* Changes will be applied when the AP/IBSS is started */
1503         if (!mvmvif->ap_ibss_active)
1504                 return;
1505
1506         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1507                        BSS_CHANGED_BANDWIDTH) &&
1508             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1509                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1510
1511         /* Need to send a new beacon template to the FW */
1512         if (changes & BSS_CHANGED_BEACON &&
1513             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1514                 IWL_WARN(mvm, "Failed updating beacon data\n");
1515 }
1516
1517 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1518                                      struct ieee80211_vif *vif,
1519                                      struct ieee80211_bss_conf *bss_conf,
1520                                      u32 changes)
1521 {
1522         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1523
1524         mutex_lock(&mvm->mutex);
1525
1526         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1527                 iwl_mvm_sched_scan_stop(mvm, true);
1528
1529         switch (vif->type) {
1530         case NL80211_IFTYPE_STATION:
1531                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1532                 break;
1533         case NL80211_IFTYPE_AP:
1534         case NL80211_IFTYPE_ADHOC:
1535                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1536                 break;
1537         default:
1538                 /* shouldn't happen */
1539                 WARN_ON_ONCE(1);
1540         }
1541
1542         mutex_unlock(&mvm->mutex);
1543 }
1544
1545 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1546                                struct ieee80211_vif *vif,
1547                                struct cfg80211_scan_request *req)
1548 {
1549         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1550         int ret;
1551
1552         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
1553                 return -EINVAL;
1554
1555         mutex_lock(&mvm->mutex);
1556
1557         switch (mvm->scan_status) {
1558         case IWL_MVM_SCAN_SCHED:
1559                 ret = iwl_mvm_sched_scan_stop(mvm, true);
1560                 if (ret) {
1561                         ret = -EBUSY;
1562                         goto out;
1563                 }
1564                 break;
1565         case IWL_MVM_SCAN_NONE:
1566                 break;
1567         default:
1568                 ret = -EBUSY;
1569                 goto out;
1570         }
1571
1572         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1573
1574         ret = iwl_mvm_scan_request(mvm, vif, req);
1575         if (ret)
1576                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1577 out:
1578         mutex_unlock(&mvm->mutex);
1579         /* make sure to flush the Rx handler before the next scan arrives */
1580         iwl_mvm_wait_for_async_handlers(mvm);
1581         return ret;
1582 }
1583
1584 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1585                                        struct ieee80211_vif *vif)
1586 {
1587         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1588
1589         mutex_lock(&mvm->mutex);
1590
1591         iwl_mvm_cancel_scan(mvm);
1592
1593         mutex_unlock(&mvm->mutex);
1594 }
1595
1596 static void
1597 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1598                                   struct ieee80211_sta *sta, u16 tids,
1599                                   int num_frames,
1600                                   enum ieee80211_frame_release_type reason,
1601                                   bool more_data)
1602 {
1603         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1604
1605         /* Called when we need to transmit (a) frame(s) from mac80211 */
1606
1607         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1608                                           tids, more_data, false);
1609 }
1610
1611 static void
1612 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1613                                     struct ieee80211_sta *sta, u16 tids,
1614                                     int num_frames,
1615                                     enum ieee80211_frame_release_type reason,
1616                                     bool more_data)
1617 {
1618         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1619
1620         /* Called when we need to transmit (a) frame(s) from agg queue */
1621
1622         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1623                                           tids, more_data, true);
1624 }
1625
1626 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1627                                    struct ieee80211_vif *vif,
1628                                    enum sta_notify_cmd cmd,
1629                                    struct ieee80211_sta *sta)
1630 {
1631         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1632         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1633         int tid;
1634
1635         switch (cmd) {
1636         case STA_NOTIFY_SLEEP:
1637                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1638                         ieee80211_sta_block_awake(hw, sta, true);
1639                 spin_lock_bh(&mvmsta->lock);
1640                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1641                         struct iwl_mvm_tid_data *tid_data;
1642
1643                         tid_data = &mvmsta->tid_data[tid];
1644                         if (tid_data->state != IWL_AGG_ON &&
1645                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1646                                 continue;
1647                         if (iwl_mvm_tid_queued(tid_data) == 0)
1648                                 continue;
1649                         ieee80211_sta_set_buffered(sta, tid, true);
1650                 }
1651                 spin_unlock_bh(&mvmsta->lock);
1652                 /*
1653                  * The fw updates the STA to be asleep. Tx packets on the Tx
1654                  * queues to this station will not be transmitted. The fw will
1655                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1656                  */
1657                 break;
1658         case STA_NOTIFY_AWAKE:
1659                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1660                         break;
1661                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1662                 break;
1663         default:
1664                 break;
1665         }
1666 }
1667
1668 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1669                                        struct ieee80211_vif *vif,
1670                                        struct ieee80211_sta *sta)
1671 {
1672         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1673         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1674
1675         /*
1676          * This is called before mac80211 does RCU synchronisation,
1677          * so here we already invalidate our internal RCU-protected
1678          * station pointer. The rest of the code will thus no longer
1679          * be able to find the station this way, and we don't rely
1680          * on further RCU synchronisation after the sta_state()
1681          * callback deleted the station.
1682          */
1683         mutex_lock(&mvm->mutex);
1684         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1685                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1686                                    ERR_PTR(-ENOENT));
1687         mutex_unlock(&mvm->mutex);
1688 }
1689
1690 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1691                                  struct ieee80211_vif *vif,
1692                                  struct ieee80211_sta *sta,
1693                                  enum ieee80211_sta_state old_state,
1694                                  enum ieee80211_sta_state new_state)
1695 {
1696         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1697         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1698         int ret;
1699
1700         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1701                            sta->addr, old_state, new_state);
1702
1703         /* this would be a mac80211 bug ... but don't crash */
1704         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1705                 return -EINVAL;
1706
1707         /* if a STA is being removed, reuse its ID */
1708         flush_work(&mvm->sta_drained_wk);
1709
1710         mutex_lock(&mvm->mutex);
1711         if (old_state == IEEE80211_STA_NOTEXIST &&
1712             new_state == IEEE80211_STA_NONE) {
1713                 /*
1714                  * Firmware bug - it'll crash if the beacon interval is less
1715                  * than 16. We can't avoid connecting at all, so refuse the
1716                  * station state change, this will cause mac80211 to abandon
1717                  * attempts to connect to this AP, and eventually wpa_s will
1718                  * blacklist the AP...
1719                  */
1720                 if (vif->type == NL80211_IFTYPE_STATION &&
1721                     vif->bss_conf.beacon_int < 16) {
1722                         IWL_ERR(mvm,
1723                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1724                                 sta->addr, vif->bss_conf.beacon_int);
1725                         ret = -EINVAL;
1726                         goto out_unlock;
1727                 }
1728                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1729         } else if (old_state == IEEE80211_STA_NONE &&
1730                    new_state == IEEE80211_STA_AUTH) {
1731                 /*
1732                  * EBS may be disabled due to previous failures reported by FW.
1733                  * Reset EBS status here assuming environment has been changed.
1734                  */
1735                 mvm->last_ebs_successful = true;
1736                 ret = 0;
1737         } else if (old_state == IEEE80211_STA_AUTH &&
1738                    new_state == IEEE80211_STA_ASSOC) {
1739                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1740                 if (ret == 0)
1741                         iwl_mvm_rs_rate_init(mvm, sta,
1742                                              mvmvif->phy_ctxt->channel->band,
1743                                              true);
1744         } else if (old_state == IEEE80211_STA_ASSOC &&
1745                    new_state == IEEE80211_STA_AUTHORIZED) {
1746                 /* enable beacon filtering */
1747                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1748                 ret = 0;
1749         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1750                    new_state == IEEE80211_STA_ASSOC) {
1751                 /* disable beacon filtering */
1752                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
1753                 ret = 0;
1754         } else if (old_state == IEEE80211_STA_ASSOC &&
1755                    new_state == IEEE80211_STA_AUTH) {
1756                 ret = 0;
1757         } else if (old_state == IEEE80211_STA_AUTH &&
1758                    new_state == IEEE80211_STA_NONE) {
1759                 ret = 0;
1760         } else if (old_state == IEEE80211_STA_NONE &&
1761                    new_state == IEEE80211_STA_NOTEXIST) {
1762                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1763         } else {
1764                 ret = -EIO;
1765         }
1766  out_unlock:
1767         mutex_unlock(&mvm->mutex);
1768
1769         return ret;
1770 }
1771
1772 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1773 {
1774         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1775
1776         mvm->rts_threshold = value;
1777
1778         return 0;
1779 }
1780
1781 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1782                                   struct ieee80211_vif *vif,
1783                                   struct ieee80211_sta *sta, u32 changed)
1784 {
1785         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1786
1787         if (vif->type == NL80211_IFTYPE_STATION &&
1788             changed & IEEE80211_RC_NSS_CHANGED)
1789                 iwl_mvm_sf_update(mvm, vif, false);
1790 }
1791
1792 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1793                                struct ieee80211_vif *vif, u16 ac,
1794                                const struct ieee80211_tx_queue_params *params)
1795 {
1796         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1797         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1798
1799         mvmvif->queue_params[ac] = *params;
1800
1801         /*
1802          * No need to update right away, we'll get BSS_CHANGED_QOS
1803          * The exception is P2P_DEVICE interface which needs immediate update.
1804          */
1805         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1806                 int ret;
1807
1808                 mutex_lock(&mvm->mutex);
1809                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1810                 mutex_unlock(&mvm->mutex);
1811                 return ret;
1812         }
1813         return 0;
1814 }
1815
1816 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1817                                       struct ieee80211_vif *vif)
1818 {
1819         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1820         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1821                            200 + vif->bss_conf.beacon_int);
1822         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1823                                100 + vif->bss_conf.beacon_int);
1824
1825         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1826                 return;
1827
1828         mutex_lock(&mvm->mutex);
1829         /* Try really hard to protect the session and hear a beacon */
1830         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1831         mutex_unlock(&mvm->mutex);
1832 }
1833
1834 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1835                                         struct ieee80211_vif *vif,
1836                                         struct cfg80211_sched_scan_request *req,
1837                                         struct ieee80211_sched_scan_ies *ies)
1838 {
1839         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1840         int ret;
1841
1842         mutex_lock(&mvm->mutex);
1843
1844         if (!iwl_mvm_is_idle(mvm)) {
1845                 ret = -EBUSY;
1846                 goto out;
1847         }
1848
1849         switch (mvm->scan_status) {
1850         case IWL_MVM_SCAN_OS:
1851                 IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n");
1852                 ret = iwl_mvm_cancel_scan(mvm);
1853                 if (ret) {
1854                         ret = -EBUSY;
1855                         goto out;
1856                 }
1857
1858                 /*
1859                  * iwl_mvm_rx_scan_complete() will be called soon but will
1860                  * not reset the scan status as it won't be IWL_MVM_SCAN_OS
1861                  * any more since we queue the next scan immediately (below).
1862                  * We make sure it is called before the next scan starts by
1863                  * flushing the async-handlers work.
1864                  */
1865                 break;
1866         case IWL_MVM_SCAN_NONE:
1867                 break;
1868         default:
1869                 ret = -EBUSY;
1870                 goto out;
1871         }
1872
1873         mvm->scan_status = IWL_MVM_SCAN_SCHED;
1874
1875         ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1876         if (ret)
1877                 goto err;
1878
1879         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1880         if (ret)
1881                 goto err;
1882
1883         ret = iwl_mvm_sched_scan_start(mvm, req);
1884         if (!ret)
1885                 goto out;
1886 err:
1887         mvm->scan_status = IWL_MVM_SCAN_NONE;
1888 out:
1889         mutex_unlock(&mvm->mutex);
1890         /* make sure to flush the Rx handler before the next scan arrives */
1891         iwl_mvm_wait_for_async_handlers(mvm);
1892         return ret;
1893 }
1894
1895 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
1896                                        struct ieee80211_vif *vif)
1897 {
1898         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1899         int ret;
1900
1901         mutex_lock(&mvm->mutex);
1902         ret = iwl_mvm_sched_scan_stop(mvm, false);
1903         mutex_unlock(&mvm->mutex);
1904         iwl_mvm_wait_for_async_handlers(mvm);
1905
1906         return ret;
1907 }
1908
1909 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1910                                enum set_key_cmd cmd,
1911                                struct ieee80211_vif *vif,
1912                                struct ieee80211_sta *sta,
1913                                struct ieee80211_key_conf *key)
1914 {
1915         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1916         int ret;
1917
1918         if (iwlwifi_mod_params.sw_crypto) {
1919                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1920                 return -EOPNOTSUPP;
1921         }
1922
1923         switch (key->cipher) {
1924         case WLAN_CIPHER_SUITE_TKIP:
1925                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1926                 /* fall-through */
1927         case WLAN_CIPHER_SUITE_CCMP:
1928                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1929                 break;
1930         case WLAN_CIPHER_SUITE_AES_CMAC:
1931                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1932                 break;
1933         case WLAN_CIPHER_SUITE_WEP40:
1934         case WLAN_CIPHER_SUITE_WEP104:
1935                 /*
1936                  * Support for TX only, at least for now, so accept
1937                  * the key and do nothing else. Then mac80211 will
1938                  * pass it for TX but we don't have to use it for RX.
1939                  */
1940                 return 0;
1941         default:
1942                 /* currently FW supports only one optional cipher scheme */
1943                 if (hw->n_cipher_schemes &&
1944                     hw->cipher_schemes->cipher == key->cipher)
1945                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
1946                 else
1947                         return -EOPNOTSUPP;
1948         }
1949
1950         mutex_lock(&mvm->mutex);
1951
1952         switch (cmd) {
1953         case SET_KEY:
1954                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1955                      vif->type == NL80211_IFTYPE_AP) && !sta) {
1956                         /*
1957                          * GTK on AP interface is a TX-only key, return 0;
1958                          * on IBSS they're per-station and because we're lazy
1959                          * we don't support them for RX, so do the same.
1960                          */
1961                         ret = 0;
1962                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1963                         break;
1964                 }
1965
1966                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1967                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1968                 if (ret) {
1969                         IWL_WARN(mvm, "set key failed\n");
1970                         /*
1971                          * can't add key for RX, but we don't need it
1972                          * in the device for TX so still return 0
1973                          */
1974                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1975                         ret = 0;
1976                 }
1977
1978                 break;
1979         case DISABLE_KEY:
1980                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1981                         ret = 0;
1982                         break;
1983                 }
1984
1985                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1986                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1987                 break;
1988         default:
1989                 ret = -EINVAL;
1990         }
1991
1992         mutex_unlock(&mvm->mutex);
1993         return ret;
1994 }
1995
1996 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1997                                         struct ieee80211_vif *vif,
1998                                         struct ieee80211_key_conf *keyconf,
1999                                         struct ieee80211_sta *sta,
2000                                         u32 iv32, u16 *phase1key)
2001 {
2002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2003
2004         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2005                 return;
2006
2007         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2008 }
2009
2010
2011 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2012                        struct ieee80211_vif *vif,
2013                        struct ieee80211_channel *channel,
2014                        int duration,
2015                        enum ieee80211_roc_type type)
2016 {
2017         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2018         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2019         struct cfg80211_chan_def chandef;
2020         struct iwl_mvm_phy_ctxt *phy_ctxt;
2021         int ret, i;
2022
2023         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2024                            duration, type);
2025
2026         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
2027                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
2028                 return -EINVAL;
2029         }
2030
2031         mutex_lock(&mvm->mutex);
2032
2033         for (i = 0; i < NUM_PHY_CTX; i++) {
2034                 phy_ctxt = &mvm->phy_ctxts[i];
2035                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2036                         continue;
2037
2038                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2039                         /*
2040                          * Unbind the P2P_DEVICE from the current PHY context,
2041                          * and if the PHY context is not used remove it.
2042                          */
2043                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2044                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2045                                 goto out_unlock;
2046
2047                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2048
2049                         /* Bind the P2P_DEVICE to the current PHY Context */
2050                         mvmvif->phy_ctxt = phy_ctxt;
2051
2052                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2053                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2054                                 goto out_unlock;
2055
2056                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2057                         goto schedule_time_event;
2058                 }
2059         }
2060
2061         /* Need to update the PHY context only if the ROC channel changed */
2062         if (channel == mvmvif->phy_ctxt->channel)
2063                 goto schedule_time_event;
2064
2065         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2066
2067         /*
2068          * Change the PHY context configuration as it is currently referenced
2069          * only by the P2P Device MAC
2070          */
2071         if (mvmvif->phy_ctxt->ref == 1) {
2072                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2073                                                &chandef, 1, 1);
2074                 if (ret)
2075                         goto out_unlock;
2076         } else {
2077                 /*
2078                  * The PHY context is shared with other MACs. Need to remove the
2079                  * P2P Device from the binding, allocate an new PHY context and
2080                  * create a new binding
2081                  */
2082                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2083                 if (!phy_ctxt) {
2084                         ret = -ENOSPC;
2085                         goto out_unlock;
2086                 }
2087
2088                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2089                                                1, 1);
2090                 if (ret) {
2091                         IWL_ERR(mvm, "Failed to change PHY context\n");
2092                         goto out_unlock;
2093                 }
2094
2095                 /* Unbind the P2P_DEVICE from the current PHY context */
2096                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2097                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2098                         goto out_unlock;
2099
2100                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2101
2102                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2103                 mvmvif->phy_ctxt = phy_ctxt;
2104
2105                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2106                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2107                         goto out_unlock;
2108
2109                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2110         }
2111
2112 schedule_time_event:
2113         /* Schedule the time events */
2114         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2115
2116 out_unlock:
2117         mutex_unlock(&mvm->mutex);
2118         IWL_DEBUG_MAC80211(mvm, "leave\n");
2119         return ret;
2120 }
2121
2122 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2123 {
2124         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2125
2126         IWL_DEBUG_MAC80211(mvm, "enter\n");
2127
2128         mutex_lock(&mvm->mutex);
2129         iwl_mvm_stop_p2p_roc(mvm);
2130         mutex_unlock(&mvm->mutex);
2131
2132         IWL_DEBUG_MAC80211(mvm, "leave\n");
2133         return 0;
2134 }
2135
2136 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2137                                struct ieee80211_chanctx_conf *ctx)
2138 {
2139         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2140         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2141         struct iwl_mvm_phy_ctxt *phy_ctxt;
2142         int ret;
2143
2144         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2145
2146         mutex_lock(&mvm->mutex);
2147         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2148         if (!phy_ctxt) {
2149                 ret = -ENOSPC;
2150                 goto out;
2151         }
2152
2153         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2154                                        ctx->rx_chains_static,
2155                                        ctx->rx_chains_dynamic);
2156         if (ret) {
2157                 IWL_ERR(mvm, "Failed to add PHY context\n");
2158                 goto out;
2159         }
2160
2161         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2162         *phy_ctxt_id = phy_ctxt->id;
2163 out:
2164         mutex_unlock(&mvm->mutex);
2165         return ret;
2166 }
2167
2168 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2169                                    struct ieee80211_chanctx_conf *ctx)
2170 {
2171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2172         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2173         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2174
2175         mutex_lock(&mvm->mutex);
2176         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2177         mutex_unlock(&mvm->mutex);
2178 }
2179
2180 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2181                                    struct ieee80211_chanctx_conf *ctx,
2182                                    u32 changed)
2183 {
2184         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2185         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2186         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2187
2188         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2189                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2190                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2191                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2192                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2193                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2194                       phy_ctxt->ref, changed))
2195                 return;
2196
2197         mutex_lock(&mvm->mutex);
2198         iwl_mvm_bt_coex_vif_change(mvm);
2199         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2200                                  ctx->rx_chains_static,
2201                                  ctx->rx_chains_dynamic);
2202         mutex_unlock(&mvm->mutex);
2203 }
2204
2205 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2206                                       struct ieee80211_vif *vif,
2207                                       struct ieee80211_chanctx_conf *ctx)
2208 {
2209         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2210         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2211         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2212         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2213         int ret;
2214
2215         mutex_lock(&mvm->mutex);
2216
2217         mvmvif->phy_ctxt = phy_ctxt;
2218
2219         switch (vif->type) {
2220         case NL80211_IFTYPE_AP:
2221                 /* Unless it's a CSA flow we have nothing to do here */
2222                 if (vif->csa_active) {
2223                         mvmvif->ap_ibss_active = true;
2224                         break;
2225                 }
2226         case NL80211_IFTYPE_ADHOC:
2227                 /*
2228                  * The AP binding flow is handled as part of the start_ap flow
2229                  * (in bss_info_changed), similarly for IBSS.
2230                  */
2231                 ret = 0;
2232                 goto out_unlock;
2233         case NL80211_IFTYPE_STATION:
2234         case NL80211_IFTYPE_MONITOR:
2235                 break;
2236         default:
2237                 ret = -EINVAL;
2238                 goto out_unlock;
2239         }
2240
2241         ret = iwl_mvm_binding_add_vif(mvm, vif);
2242         if (ret)
2243                 goto out_unlock;
2244
2245         /*
2246          * Power state must be updated before quotas,
2247          * otherwise fw will complain.
2248          */
2249         iwl_mvm_power_update_mac(mvm);
2250
2251         /* Setting the quota at this stage is only required for monitor
2252          * interfaces. For the other types, the bss_info changed flow
2253          * will handle quota settings.
2254          */
2255         if (vif->type == NL80211_IFTYPE_MONITOR) {
2256                 mvmvif->monitor_active = true;
2257                 ret = iwl_mvm_update_quotas(mvm, vif);
2258                 if (ret)
2259                         goto out_remove_binding;
2260         }
2261
2262         /* Handle binding during CSA */
2263         if (vif->type == NL80211_IFTYPE_AP) {
2264                 iwl_mvm_update_quotas(mvm, vif);
2265                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2266         }
2267
2268         goto out_unlock;
2269
2270  out_remove_binding:
2271         iwl_mvm_binding_remove_vif(mvm, vif);
2272         iwl_mvm_power_update_mac(mvm);
2273  out_unlock:
2274         mutex_unlock(&mvm->mutex);
2275         if (ret)
2276                 mvmvif->phy_ctxt = NULL;
2277         return ret;
2278 }
2279
2280 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2281                                          struct ieee80211_vif *vif,
2282                                          struct ieee80211_chanctx_conf *ctx)
2283 {
2284         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2285         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2286
2287         mutex_lock(&mvm->mutex);
2288
2289         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2290
2291         switch (vif->type) {
2292         case NL80211_IFTYPE_ADHOC:
2293                 goto out_unlock;
2294         case NL80211_IFTYPE_MONITOR:
2295                 mvmvif->monitor_active = false;
2296                 iwl_mvm_update_quotas(mvm, NULL);
2297                 break;
2298         case NL80211_IFTYPE_AP:
2299                 /* This part is triggered only during CSA */
2300                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2301                         goto out_unlock;
2302
2303                 mvmvif->ap_ibss_active = false;
2304                 iwl_mvm_update_quotas(mvm, NULL);
2305                 /*TODO: bt_coex notification here? */
2306         default:
2307                 break;
2308         }
2309
2310         iwl_mvm_binding_remove_vif(mvm, vif);
2311
2312 out_unlock:
2313         mvmvif->phy_ctxt = NULL;
2314         iwl_mvm_power_update_mac(mvm);
2315         mutex_unlock(&mvm->mutex);
2316 }
2317
2318 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2319                            struct ieee80211_sta *sta,
2320                            bool set)
2321 {
2322         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2323         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2324
2325         if (!mvm_sta || !mvm_sta->vif) {
2326                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2327                 return -EINVAL;
2328         }
2329
2330         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2331 }
2332
2333 #ifdef CONFIG_NL80211_TESTMODE
2334 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2335         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2336         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2337         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2338 };
2339
2340 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2341                                       struct ieee80211_vif *vif,
2342                                       void *data, int len)
2343 {
2344         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2345         int err;
2346         u32 noa_duration;
2347
2348         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2349         if (err)
2350                 return err;
2351
2352         if (!tb[IWL_MVM_TM_ATTR_CMD])
2353                 return -EINVAL;
2354
2355         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2356         case IWL_MVM_TM_CMD_SET_NOA:
2357                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2358                     !vif->bss_conf.enable_beacon ||
2359                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2360                         return -EINVAL;
2361
2362                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2363                 if (noa_duration >= vif->bss_conf.beacon_int)
2364                         return -EINVAL;
2365
2366                 mvm->noa_duration = noa_duration;
2367                 mvm->noa_vif = vif;
2368
2369                 return iwl_mvm_update_quotas(mvm, NULL);
2370         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2371                 /* must be associated client vif - ignore authorized */
2372                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2373                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2374                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2375                         return -EINVAL;
2376
2377                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2378                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2379                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2380         }
2381
2382         return -EOPNOTSUPP;
2383 }
2384
2385 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2386                                     struct ieee80211_vif *vif,
2387                                     void *data, int len)
2388 {
2389         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2390         int err;
2391
2392         mutex_lock(&mvm->mutex);
2393         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2394         mutex_unlock(&mvm->mutex);
2395
2396         return err;
2397 }
2398 #endif
2399
2400 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2401                                           struct ieee80211_vif *vif,
2402                                           struct cfg80211_chan_def *chandef)
2403 {
2404         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2405
2406         mutex_lock(&mvm->mutex);
2407         if (WARN(mvm->csa_vif && mvm->csa_vif->csa_active,
2408                  "Another CSA is already in progress"))
2409                 goto out_unlock;
2410
2411         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2412                            chandef->center_freq1);
2413         mvm->csa_vif = vif;
2414
2415 out_unlock:
2416         mutex_unlock(&mvm->mutex);
2417 }
2418
2419 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2420                               struct ieee80211_vif *vif, u32 queues, bool drop)
2421 {
2422         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2423         struct iwl_mvm_vif *mvmvif;
2424         struct iwl_mvm_sta *mvmsta;
2425
2426         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2427                 return;
2428
2429         mutex_lock(&mvm->mutex);
2430         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2431         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2432
2433         if (WARN_ON_ONCE(!mvmsta))
2434                 goto done;
2435
2436         if (drop) {
2437                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2438                         IWL_ERR(mvm, "flush request fail\n");
2439         } else {
2440                 iwl_trans_wait_tx_queue_empty(mvm->trans,
2441                                               mvmsta->tfd_queue_msk);
2442         }
2443 done:
2444         mutex_unlock(&mvm->mutex);
2445 }
2446
2447 const struct ieee80211_ops iwl_mvm_hw_ops = {
2448         .tx = iwl_mvm_mac_tx,
2449         .ampdu_action = iwl_mvm_mac_ampdu_action,
2450         .start = iwl_mvm_mac_start,
2451         .restart_complete = iwl_mvm_mac_restart_complete,
2452         .stop = iwl_mvm_mac_stop,
2453         .add_interface = iwl_mvm_mac_add_interface,
2454         .remove_interface = iwl_mvm_mac_remove_interface,
2455         .config = iwl_mvm_mac_config,
2456         .prepare_multicast = iwl_mvm_prepare_multicast,
2457         .configure_filter = iwl_mvm_configure_filter,
2458         .bss_info_changed = iwl_mvm_bss_info_changed,
2459         .hw_scan = iwl_mvm_mac_hw_scan,
2460         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
2461         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
2462         .sta_state = iwl_mvm_mac_sta_state,
2463         .sta_notify = iwl_mvm_mac_sta_notify,
2464         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
2465         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
2466         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
2467         .sta_rc_update = iwl_mvm_sta_rc_update,
2468         .conf_tx = iwl_mvm_mac_conf_tx,
2469         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
2470         .flush = iwl_mvm_mac_flush,
2471         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
2472         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
2473         .set_key = iwl_mvm_mac_set_key,
2474         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
2475         .remain_on_channel = iwl_mvm_roc,
2476         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
2477         .add_chanctx = iwl_mvm_add_chanctx,
2478         .remove_chanctx = iwl_mvm_remove_chanctx,
2479         .change_chanctx = iwl_mvm_change_chanctx,
2480         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
2481         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
2482
2483         .start_ap = iwl_mvm_start_ap_ibss,
2484         .stop_ap = iwl_mvm_stop_ap_ibss,
2485         .join_ibss = iwl_mvm_start_ap_ibss,
2486         .leave_ibss = iwl_mvm_stop_ap_ibss,
2487
2488         .set_tim = iwl_mvm_set_tim,
2489
2490         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
2491
2492         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
2493
2494 #ifdef CONFIG_PM_SLEEP
2495         /* look at d3.c */
2496         .suspend = iwl_mvm_suspend,
2497         .resume = iwl_mvm_resume,
2498         .set_wakeup = iwl_mvm_set_wakeup,
2499         .set_rekey_data = iwl_mvm_set_rekey_data,
2500 #if IS_ENABLED(CONFIG_IPV6)
2501         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
2502 #endif
2503         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
2504 #endif
2505 };