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.
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   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  11  * it under the terms of version 2 of the GNU General Public License as
  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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  43  *    notice, this list of conditions and the following disclaimer in
  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.
  49  *
  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,
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  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         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 307         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 308         hw->chanctx_data_size = sizeof(u16);
 309
 310         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 311                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 312                 BIT(NL80211_IFTYPE_AP) |
 313                 BIT(NL80211_IFTYPE_P2P_GO) |
 314                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 315                 BIT(NL80211_IFTYPE_ADHOC);
 316
 317         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 318         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 319                                        REGULATORY_DISABLE_BEACON_HINTS;
 320
 321         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 322                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 323
 324         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 325                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 326
 327         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 328         hw->wiphy->n_iface_combinations =
 329                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 330
 331         hw->wiphy->max_remain_on_channel_duration = 10000;
 332         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 333
 334         /* Extract MAC address */
 335         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 336         hw->wiphy->addresses = mvm->addresses;
 337         hw->wiphy->n_addresses = 1;
 338
 339         /* Extract additional MAC addresses if available */
 340         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 341                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 342
 343         for (i = 1; i < num_mac; i++) {
 344                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 345                        ETH_ALEN);
 346                 mvm->addresses[i].addr[5]++;
 347                 hw->wiphy->n_addresses++;
 348         }
 349
 350         iwl_mvm_reset_phy_ctxts(mvm);
 351
 352         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 353
 354         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 355
 356         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 357                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 358                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 359         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 360                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 361                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 362
 363         hw->wiphy->hw_version = mvm->trans->hw_id;
 364
 365         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 366                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 367         else
 368                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 369
 370         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 371         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 372         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 373         /* we create the 802.11 header and zero length SSID IE. */
 374         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 375
 376         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 377                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 378                                NL80211_FEATURE_P2P_GO_OPPPS;
 379
 380         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 381
 382         /* currently FW API supports only one optional cipher scheme */
 383         if (mvm->fw->cs[0].cipher) {
 384                 mvm->hw->n_cipher_schemes = 1;
 385                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 386         }
 387
 388 #ifdef CONFIG_PM_SLEEP
 389         if (iwl_mvm_is_d0i3_supported(mvm) &&
 390             device_can_wakeup(mvm->trans->dev)) {
 391                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 392                 hw->wiphy->wowlan = &mvm->wowlan;
 393         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 394             mvm->trans->ops->d3_suspend &&
 395             mvm->trans->ops->d3_resume &&
 396             device_can_wakeup(mvm->trans->dev)) {
 397                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 398                                     WIPHY_WOWLAN_DISCONNECT |
 399                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 400                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 401                 if (!iwlwifi_mod_params.sw_crypto)
 402                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 403                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 404                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 405
 406                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 407                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 408                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 409                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 410                 hw->wiphy->wowlan = &mvm->wowlan;
 411         }
 412 #endif
 413
 414 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 415         /* assign default bcast filtering configuration */
 416         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 417 #endif
 418
 419         ret = iwl_mvm_leds_init(mvm);
 420         if (ret)
 421                 return ret;
 422
 423         ret = ieee80211_register_hw(mvm->hw);
 424         if (ret)
 425                 iwl_mvm_leds_exit(mvm);
 426
 427         return ret;
 428 }
 429
 430 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 431                              struct ieee80211_sta *sta,
 432                              struct sk_buff *skb)
 433 {
 434         struct iwl_mvm_sta *mvmsta;
 435         bool defer = false;
 436
 437         /*
 438          * double check the IN_D0I3 flag both before and after
 439          * taking the spinlock, in order to prevent taking
 440          * the spinlock when not needed.
 441          */
 442         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 443                 return false;
 444
 445         spin_lock(&mvm->d0i3_tx_lock);
 446         /*
 447          * testing the flag again ensures the skb dequeue
 448          * loop (on d0i3 exit) hasn't run yet.
 449          */
 450         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 451                 goto out;
 452
 453         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 454         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 455             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 456                 goto out;
 457
 458         __skb_queue_tail(&mvm->d0i3_tx, skb);
 459         ieee80211_stop_queues(mvm->hw);
 460
 461         /* trigger wakeup */
 462         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 463         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 464
 465         defer = true;
 466 out:
 467         spin_unlock(&mvm->d0i3_tx_lock);
 468         return defer;
 469 }
 470
 471 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 472                            struct ieee80211_tx_control *control,
 473                            struct sk_buff *skb)
 474 {
 475         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 476         struct ieee80211_sta *sta = control->sta;
 477         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 478         struct ieee80211_hdr *hdr = (void *)skb->data;
 479
 480         if (iwl_mvm_is_radio_killed(mvm)) {
 481                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 482                 goto drop;
 483         }
 484
 485         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 486             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 487                 goto drop;
 488
 489         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 490         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 491                      ieee80211_is_mgmt(hdr->frame_control) &&
 492                      !ieee80211_is_deauth(hdr->frame_control) &&
 493                      !ieee80211_is_disassoc(hdr->frame_control) &&
 494                      !ieee80211_is_action(hdr->frame_control)))
 495                 sta = NULL;
 496
 497         if (sta) {
 498                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 499                         return;
 500                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 501                         goto drop;
 502                 return;
 503         }
 504
 505         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 506                 goto drop;
 507         return;
 508  drop:
 509         ieee80211_free_txskb(hw, skb);
 510 }
 511
 512 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 513 {
 514         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 515                 return false;
 516         return true;
 517 }
 518
 519 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 520 {
 521         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 522                 return false;
 523         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 524                 return true;
 525
 526         /* enabled by default */
 527         return true;
 528 }
 529
 530 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 531                                     struct ieee80211_vif *vif,
 532                                     enum ieee80211_ampdu_mlme_action action,
 533                                     struct ieee80211_sta *sta, u16 tid,
 534                                     u16 *ssn, u8 buf_size)
 535 {
 536         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 537         int ret;
 538         bool tx_agg_ref = false;
 539
 540         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 541                      sta->addr, tid, action);
 542
 543         if (!(mvm->nvm_data->sku_cap_11n_enable))
 544                 return -EACCES;
 545
 546         /* return from D0i3 before starting a new Tx aggregation */
 547         switch (action) {
 548         case IEEE80211_AMPDU_TX_START:
 549         case IEEE80211_AMPDU_TX_STOP_CONT:
 550         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 551         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 552         case IEEE80211_AMPDU_TX_OPERATIONAL:
 553                 iwl_mvm_ref(mvm, IWL_MVM_REF_TX_AGG);
 554                 tx_agg_ref = true;
 555
 556                 /*
 557                  * for tx start, wait synchronously until D0i3 exit to
 558                  * get the correct sequence number for the tid.
 559                  * additionally, some other ampdu actions use direct
 560                  * target access, which is not handled automatically
 561                  * by the trans layer (unlike commands), so wait for
 562                  * d0i3 exit in these cases as well.
 563                  */
 564                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 565                           !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status), HZ)) {
 566                         WARN_ON_ONCE(1);
 567                         iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 568                         return -EIO;
 569                 }
 570                 break;
 571         default:
 572                 break;
 573         }
 574
 575         mutex_lock(&mvm->mutex);
 576
 577         switch (action) {
 578         case IEEE80211_AMPDU_RX_START:
 579                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 580                         ret = -EINVAL;
 581                         break;
 582                 }
 583                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 584                 break;
 585         case IEEE80211_AMPDU_RX_STOP:
 586                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 587                 break;
 588         case IEEE80211_AMPDU_TX_START:
 589                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 590                         ret = -EINVAL;
 591                         break;
 592                 }
 593                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 594                 break;
 595         case IEEE80211_AMPDU_TX_STOP_CONT:
 596                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 597                 break;
 598         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 599         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 600                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 601                 break;
 602         case IEEE80211_AMPDU_TX_OPERATIONAL:
 603                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 604                 break;
 605         default:
 606                 WARN_ON_ONCE(1);
 607                 ret = -EINVAL;
 608                 break;
 609         }
 610         mutex_unlock(&mvm->mutex);
 611
 612         /*
 613          * If the tid is marked as started, we won't use it for offloaded
 614          * traffic on the next D0i3 entry. It's safe to unref.
 615          */
 616         if (tx_agg_ref)
 617                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 618
 619         return ret;
 620 }
 621
 622 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 623                                      struct ieee80211_vif *vif)
 624 {
 625         struct iwl_mvm *mvm = data;
 626         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 627
 628         mvmvif->uploaded = false;
 629         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 630
 631         /* does this make sense at all? */
 632         mvmvif->color++;
 633
 634         spin_lock_bh(&mvm->time_event_lock);
 635         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 636         spin_unlock_bh(&mvm->time_event_lock);
 637
 638         mvmvif->phy_ctxt = NULL;
 639 }
 640
 641 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 642 {
 643 #ifdef CONFIG_IWLWIFI_DEBUGFS
 644         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 645
 646         iwl_mvm_fw_error_dump(mvm);
 647
 648         /* notify the userspace about the error we had */
 649         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 650 #endif
 651
 652         iwl_trans_stop_device(mvm->trans);
 653
 654         mvm->scan_status = IWL_MVM_SCAN_NONE;
 655
 656         /* just in case one was running */
 657         ieee80211_remain_on_channel_expired(mvm->hw);
 658
 659         ieee80211_iterate_active_interfaces_atomic(
 660                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 661                 iwl_mvm_cleanup_iterator, mvm);
 662
 663         mvm->p2p_device_vif = NULL;
 664         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 665
 666         iwl_mvm_reset_phy_ctxts(mvm);
 667         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 668         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 669
 670         ieee80211_wake_queues(mvm->hw);
 671
 672         /* cleanup all stale references (scan, roc), but keep the
 673          * ucode_down ref until reconfig is complete */
 674         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 675
 676         mvm->vif_count = 0;
 677         mvm->rx_ba_sessions = 0;
 678 }
 679
 680 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 681 {
 682         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 683         int ret;
 684
 685         mutex_lock(&mvm->mutex);
 686
 687         /* Clean up some internal and mac80211 state on restart */
 688         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 689                 iwl_mvm_restart_cleanup(mvm);
 690
 691         ret = iwl_mvm_up(mvm);
 692         mutex_unlock(&mvm->mutex);
 693
 694         return ret;
 695 }
 696
 697 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 698 {
 699         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 700         int ret;
 701
 702         mutex_lock(&mvm->mutex);
 703
 704         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 705         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 706         ret = iwl_mvm_update_quotas(mvm, NULL);
 707         if (ret)
 708                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 709                         ret);
 710
 711         /* allow transport/FW low power modes */
 712         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 713
 714         mutex_unlock(&mvm->mutex);
 715 }
 716
 717 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 718 {
 719         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 720
 721         flush_work(&mvm->d0i3_exit_work);
 722         flush_work(&mvm->async_handlers_wk);
 723
 724         mutex_lock(&mvm->mutex);
 725
 726         /* disallow low power states when the FW is down */
 727         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 728
 729         /* async_handlers_wk is now blocked */
 730
 731         /*
 732          * The work item could be running or queued if the
 733          * ROC time event stops just as we get here.
 734          */
 735         cancel_work_sync(&mvm->roc_done_wk);
 736
 737         iwl_trans_stop_device(mvm->trans);
 738
 739         iwl_mvm_async_handlers_purge(mvm);
 740         /* async_handlers_list is empty and will stay empty: HW is stopped */
 741
 742         /* the fw is stopped, the aux sta is dead: clean up driver state */
 743         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 744
 745         mutex_unlock(&mvm->mutex);
 746
 747         /*
 748          * The worker might have been waiting for the mutex, let it run and
 749          * discover that its list is now empty.
 750          */
 751         cancel_work_sync(&mvm->async_handlers_wk);
 752 }
 753
 754 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 755 {
 756         u16 i;
 757
 758         lockdep_assert_held(&mvm->mutex);
 759
 760         for (i = 0; i < NUM_PHY_CTX; i++)
 761                 if (!mvm->phy_ctxts[i].ref)
 762                         return &mvm->phy_ctxts[i];
 763
 764         IWL_ERR(mvm, "No available PHY context\n");
 765         return NULL;
 766 }
 767
 768 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 769                                 s8 tx_power)
 770 {
 771         /* FW is in charge of regulatory enforcement */
 772         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 773                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 774                 .pwr_restriction = cpu_to_le16(tx_power),
 775         };
 776
 777         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 778                                     sizeof(reduce_txpwr_cmd),
 779                                     &reduce_txpwr_cmd);
 780 }
 781
 782 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 783                                      struct ieee80211_vif *vif)
 784 {
 785         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 786         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 787         int ret;
 788
 789         /*
 790          * Not much to do here. The stack will not allow interface
 791          * types or combinations that we didn't advertise, so we
 792          * don't really have to check the types.
 793          */
 794
 795         mutex_lock(&mvm->mutex);
 796
 797         /* Allocate resources for the MAC context, and add it to the fw  */
 798         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 799         if (ret)
 800                 goto out_unlock;
 801
 802         /* Counting number of interfaces is needed for legacy PM */
 803         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 804                 mvm->vif_count++;
 805
 806         /*
 807          * The AP binding flow can be done only after the beacon
 808          * template is configured (which happens only in the mac80211
 809          * start_ap() flow), and adding the broadcast station can happen
 810          * only after the binding.
 811          * In addition, since modifying the MAC before adding a bcast
 812          * station is not allowed by the FW, delay the adding of MAC context to
 813          * the point where we can also add the bcast station.
 814          * In short: there's not much we can do at this point, other than
 815          * allocating resources :)
 816          */
 817         if (vif->type == NL80211_IFTYPE_AP ||
 818             vif->type == NL80211_IFTYPE_ADHOC) {
 819                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 820                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 821                                                qmask,
 822                                                ieee80211_vif_type_p2p(vif));
 823                 if (ret) {
 824                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 825                         goto out_release;
 826                 }
 827
 828                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 829                 goto out_unlock;
 830         }
 831
 832         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 833         if (ret)
 834                 goto out_release;
 835
 836         ret = iwl_mvm_power_update_mac(mvm);
 837         if (ret)
 838                 goto out_release;
 839
 840         /* beacon filtering */
 841         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 842         if (ret)
 843                 goto out_remove_mac;
 844
 845         if (!mvm->bf_allowed_vif &&
 846             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 847                 mvm->bf_allowed_vif = mvmvif;
 848                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 849                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 850         }
 851
 852         /*
 853          * P2P_DEVICE interface does not have a channel context assigned to it,
 854          * so a dedicated PHY context is allocated to it and the corresponding
 855          * MAC context is bound to it at this stage.
 856          */
 857         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 858
 859                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 860                 if (!mvmvif->phy_ctxt) {
 861                         ret = -ENOSPC;
 862                         goto out_free_bf;
 863                 }
 864
 865                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 866                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 867                 if (ret)
 868                         goto out_unref_phy;
 869
 870                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 871                 if (ret)
 872                         goto out_unbind;
 873
 874                 /* Save a pointer to p2p device vif, so it can later be used to
 875                  * update the p2p device MAC when a GO is started/stopped */
 876                 mvm->p2p_device_vif = vif;
 877         }
 878
 879         iwl_mvm_vif_dbgfs_register(mvm, vif);
 880         goto out_unlock;
 881
 882  out_unbind:
 883         iwl_mvm_binding_remove_vif(mvm, vif);
 884  out_unref_phy:
 885         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 886  out_free_bf:
 887         if (mvm->bf_allowed_vif == mvmvif) {
 888                 mvm->bf_allowed_vif = NULL;
 889                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 890                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 891         }
 892  out_remove_mac:
 893         mvmvif->phy_ctxt = NULL;
 894         iwl_mvm_mac_ctxt_remove(mvm, vif);
 895  out_release:
 896         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 897                 mvm->vif_count--;
 898
 899         iwl_mvm_mac_ctxt_release(mvm, vif);
 900  out_unlock:
 901         mutex_unlock(&mvm->mutex);
 902
 903         return ret;
 904 }
 905
 906 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 907                                         struct ieee80211_vif *vif)
 908 {
 909         u32 tfd_msk = 0, ac;
 910
 911         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 912                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 913                         tfd_msk |= BIT(vif->hw_queue[ac]);
 914
 915         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 916                 tfd_msk |= BIT(vif->cab_queue);
 917
 918         if (tfd_msk) {
 919                 mutex_lock(&mvm->mutex);
 920                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 921                 mutex_unlock(&mvm->mutex);
 922         }
 923
 924         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 925                 /*
 926                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 927                  * We assume here that all the packets sent to the OFFCHANNEL
 928                  * queue are sent in ROC session.
 929                  */
 930                 flush_work(&mvm->roc_done_wk);
 931         } else {
 932                 /*
 933                  * By now, all the AC queues are empty. The AGG queues are
 934                  * empty too. We already got all the Tx responses for all the
 935                  * packets in the queues. The drain work can have been
 936                  * triggered. Flush it.
 937                  */
 938                 flush_work(&mvm->sta_drained_wk);
 939         }
 940 }
 941
 942 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 943                                          struct ieee80211_vif *vif)
 944 {
 945         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 946         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 947
 948         iwl_mvm_prepare_mac_removal(mvm, vif);
 949
 950         mutex_lock(&mvm->mutex);
 951
 952         if (mvm->bf_allowed_vif == mvmvif) {
 953                 mvm->bf_allowed_vif = NULL;
 954                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 955                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 956         }
 957
 958         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 959
 960         /*
 961          * For AP/GO interface, the tear down of the resources allocated to the
 962          * interface is be handled as part of the stop_ap flow.
 963          */
 964         if (vif->type == NL80211_IFTYPE_AP ||
 965             vif->type == NL80211_IFTYPE_ADHOC) {
 966 #ifdef CONFIG_NL80211_TESTMODE
 967                 if (vif == mvm->noa_vif) {
 968                         mvm->noa_vif = NULL;
 969                         mvm->noa_duration = 0;
 970                 }
 971 #endif
 972                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 973                 goto out_release;
 974         }
 975
 976         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 977                 mvm->p2p_device_vif = NULL;
 978                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 979                 iwl_mvm_binding_remove_vif(mvm, vif);
 980                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 981                 mvmvif->phy_ctxt = NULL;
 982         }
 983
 984         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 985                 mvm->vif_count--;
 986
 987         iwl_mvm_power_update_mac(mvm);
 988         iwl_mvm_mac_ctxt_remove(mvm, vif);
 989
 990 out_release:
 991         iwl_mvm_mac_ctxt_release(mvm, vif);
 992         mutex_unlock(&mvm->mutex);
 993 }
 994
 995 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 996 {
 997         return 0;
 998 }
 999
1000 struct iwl_mvm_mc_iter_data {
1001         struct iwl_mvm *mvm;
1002         int port_id;
1003 };
1004
1005 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1006                                       struct ieee80211_vif *vif)
1007 {
1008         struct iwl_mvm_mc_iter_data *data = _data;
1009         struct iwl_mvm *mvm = data->mvm;
1010         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1011         int ret, len;
1012
1013         /* if we don't have free ports, mcast frames will be dropped */
1014         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1015                 return;
1016
1017         if (vif->type != NL80211_IFTYPE_STATION ||
1018             !vif->bss_conf.assoc)
1019                 return;
1020
1021         cmd->port_id = data->port_id++;
1022         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1023         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1024
1025         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1026         if (ret)
1027                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1028 }
1029
1030 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1031 {
1032         struct iwl_mvm_mc_iter_data iter_data = {
1033                 .mvm = mvm,
1034         };
1035
1036         lockdep_assert_held(&mvm->mutex);
1037
1038         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1039                 return;
1040
1041         ieee80211_iterate_active_interfaces_atomic(
1042                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1043                 iwl_mvm_mc_iface_iterator, &iter_data);
1044 }
1045
1046 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1047                                      struct netdev_hw_addr_list *mc_list)
1048 {
1049         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1050         struct iwl_mcast_filter_cmd *cmd;
1051         struct netdev_hw_addr *addr;
1052         int addr_count = netdev_hw_addr_list_count(mc_list);
1053         bool pass_all = false;
1054         int len;
1055
1056         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1057                 pass_all = true;
1058                 addr_count = 0;
1059         }
1060
1061         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1062         cmd = kzalloc(len, GFP_ATOMIC);
1063         if (!cmd)
1064                 return 0;
1065
1066         if (pass_all) {
1067                 cmd->pass_all = 1;
1068                 return (u64)(unsigned long)cmd;
1069         }
1070
1071         netdev_hw_addr_list_for_each(addr, mc_list) {
1072                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1073                                    cmd->count, addr->addr);
1074                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1075                        addr->addr, ETH_ALEN);
1076                 cmd->count++;
1077         }
1078
1079         return (u64)(unsigned long)cmd;
1080 }
1081
1082 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1083                                      unsigned int changed_flags,
1084                                      unsigned int *total_flags,
1085                                      u64 multicast)
1086 {
1087         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1088         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1089
1090         mutex_lock(&mvm->mutex);
1091
1092         /* replace previous configuration */
1093         kfree(mvm->mcast_filter_cmd);
1094         mvm->mcast_filter_cmd = cmd;
1095
1096         if (!cmd)
1097                 goto out;
1098
1099         iwl_mvm_recalc_multicast(mvm);
1100 out:
1101         mutex_unlock(&mvm->mutex);
1102         *total_flags = 0;
1103 }
1104
1105 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1106 struct iwl_bcast_iter_data {
1107         struct iwl_mvm *mvm;
1108         struct iwl_bcast_filter_cmd *cmd;
1109         u8 current_filter;
1110 };
1111
1112 static void
1113 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1114                          const struct iwl_fw_bcast_filter *in_filter,
1115                          struct iwl_fw_bcast_filter *out_filter)
1116 {
1117         struct iwl_fw_bcast_filter_attr *attr;
1118         int i;
1119
1120         memcpy(out_filter, in_filter, sizeof(*out_filter));
1121
1122         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1123                 attr = &out_filter->attrs[i];
1124
1125                 if (!attr->mask)
1126                         break;
1127
1128                 switch (attr->reserved1) {
1129                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1130                         if (vif->bss_conf.arp_addr_cnt != 1) {
1131                                 attr->mask = 0;
1132                                 continue;
1133                         }
1134
1135                         attr->val = vif->bss_conf.arp_addr_list[0];
1136                         break;
1137                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1138                         attr->val = *(__be32 *)&vif->addr[2];
1139                         break;
1140                 default:
1141                         break;
1142                 }
1143                 attr->reserved1 = 0;
1144                 out_filter->num_attrs++;
1145         }
1146 }
1147
1148 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1149                                           struct ieee80211_vif *vif)
1150 {
1151         struct iwl_bcast_iter_data *data = _data;
1152         struct iwl_mvm *mvm = data->mvm;
1153         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1154         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1155         struct iwl_fw_bcast_mac *bcast_mac;
1156         int i;
1157
1158         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1159                 return;
1160
1161         bcast_mac = &cmd->macs[mvmvif->id];
1162
1163         /* enable filtering only for associated stations */
1164         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1165                 return;
1166
1167         bcast_mac->default_discard = 1;
1168
1169         /* copy all configured filters */
1170         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1171                 /*
1172                  * Make sure we don't exceed our filters limit.
1173                  * if there is still a valid filter to be configured,
1174                  * be on the safe side and just allow bcast for this mac.
1175                  */
1176                 if (WARN_ON_ONCE(data->current_filter >=
1177                                  ARRAY_SIZE(cmd->filters))) {
1178                         bcast_mac->default_discard = 0;
1179                         bcast_mac->attached_filters = 0;
1180                         break;
1181                 }
1182
1183                 iwl_mvm_set_bcast_filter(vif,
1184                                          &mvm->bcast_filters[i],
1185                                          &cmd->filters[data->current_filter]);
1186
1187                 /* skip current filter if it contains no attributes */
1188                 if (!cmd->filters[data->current_filter].num_attrs)
1189                         continue;
1190
1191                 /* attach the filter to current mac */
1192                 bcast_mac->attached_filters |=
1193                                 cpu_to_le16(BIT(data->current_filter));
1194
1195                 data->current_filter++;
1196         }
1197 }
1198
1199 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1200                                     struct iwl_bcast_filter_cmd *cmd)
1201 {
1202         struct iwl_bcast_iter_data iter_data = {
1203                 .mvm = mvm,
1204                 .cmd = cmd,
1205         };
1206
1207         memset(cmd, 0, sizeof(*cmd));
1208         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1209         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1210
1211 #ifdef CONFIG_IWLWIFI_DEBUGFS
1212         /* use debugfs filters/macs if override is configured */
1213         if (mvm->dbgfs_bcast_filtering.override) {
1214                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1215                        sizeof(cmd->filters));
1216                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1217                        sizeof(cmd->macs));
1218                 return true;
1219         }
1220 #endif
1221
1222         /* if no filters are configured, do nothing */
1223         if (!mvm->bcast_filters)
1224                 return false;
1225
1226         /* configure and attach these filters for each associated sta vif */
1227         ieee80211_iterate_active_interfaces(
1228                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1229                 iwl_mvm_bcast_filter_iterator, &iter_data);
1230
1231         return true;
1232 }
1233 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1234                                           struct ieee80211_vif *vif)
1235 {
1236         struct iwl_bcast_filter_cmd cmd;
1237
1238         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1239                 return 0;
1240
1241         /* bcast filtering isn't supported for P2P client */
1242         if (vif->p2p)
1243                 return 0;
1244
1245         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1246                 return 0;
1247
1248         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1249                                     sizeof(cmd), &cmd);
1250 }
1251 #else
1252 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1253                                                  struct ieee80211_vif *vif)
1254 {
1255         return 0;
1256 }
1257 #endif
1258
1259 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1260                                              struct ieee80211_vif *vif,
1261                                              struct ieee80211_bss_conf *bss_conf,
1262                                              u32 changes)
1263 {
1264         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1265         int ret;
1266
1267         /*
1268          * Re-calculate the tsf id, as the master-slave relations depend on the
1269          * beacon interval, which was not known when the station interface was
1270          * added.
1271          */
1272         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1273                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1274
1275         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1276         if (ret)
1277                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1278
1279         if (changes & BSS_CHANGED_ASSOC) {
1280                 if (bss_conf->assoc) {
1281                         /* add quota for this interface */
1282                         ret = iwl_mvm_update_quotas(mvm, vif);
1283                         if (ret) {
1284                                 IWL_ERR(mvm, "failed to update quotas\n");
1285                                 return;
1286                         }
1287
1288                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1289                                      &mvm->status)) {
1290                                 /*
1291                                  * If we're restarting then the firmware will
1292                                  * obviously have lost synchronisation with
1293                                  * the AP. It will attempt to synchronise by
1294                                  * itself, but we can make it more reliable by
1295                                  * scheduling a session protection time event.
1296                                  *
1297                                  * The firmware needs to receive a beacon to
1298                                  * catch up with synchronisation, use 110% of
1299                                  * the beacon interval.
1300                                  *
1301                                  * Set a large maximum delay to allow for more
1302                                  * than a single interface.
1303                                  */
1304                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1305                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1306                                                         5 * dur);
1307                         }
1308
1309                         iwl_mvm_sf_update(mvm, vif, false);
1310                         iwl_mvm_power_vif_assoc(mvm, vif);
1311                         if (vif->p2p)
1312                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1313                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1314                         /*
1315                          * If update fails - SF might be running in associated
1316                          * mode while disassociated - which is forbidden.
1317                          */
1318                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1319                                   "Failed to update SF upon disassociation\n");
1320
1321                         /* remove AP station now that the MAC is unassoc */
1322                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1323                         if (ret)
1324                                 IWL_ERR(mvm, "failed to remove AP station\n");
1325
1326                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1327                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1328                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1329                         /* remove quota for this interface */
1330                         ret = iwl_mvm_update_quotas(mvm, NULL);
1331                         if (ret)
1332                                 IWL_ERR(mvm, "failed to update quotas\n");
1333
1334                         if (vif->p2p)
1335                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1336                 }
1337
1338                 iwl_mvm_recalc_multicast(mvm);
1339                 iwl_mvm_configure_bcast_filter(mvm, vif);
1340
1341                 /* reset rssi values */
1342                 mvmvif->bf_data.ave_beacon_signal = 0;
1343
1344                 iwl_mvm_bt_coex_vif_change(mvm);
1345                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1346                                     IEEE80211_SMPS_AUTOMATIC);
1347         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1348                 /*
1349                  * We received a beacon _after_ association so
1350                  * remove the session protection.
1351                  */
1352                 iwl_mvm_remove_time_event(mvm, mvmvif,
1353                                           &mvmvif->time_event_data);
1354                 iwl_mvm_sf_update(mvm, vif, false);
1355                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1356         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1357                               BSS_CHANGED_QOS)) {
1358                 ret = iwl_mvm_power_update_mac(mvm);
1359                 if (ret)
1360                         IWL_ERR(mvm, "failed to update power mode\n");
1361         }
1362         if (changes & BSS_CHANGED_TXPOWER) {
1363                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1364                                 bss_conf->txpower);
1365                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1366         }
1367
1368         if (changes & BSS_CHANGED_CQM) {
1369                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1370                 /* reset cqm events tracking */
1371                 mvmvif->bf_data.last_cqm_event = 0;
1372                 if (mvmvif->bf_data.bf_enabled) {
1373                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1374                         if (ret)
1375                                 IWL_ERR(mvm,
1376                                         "failed to update CQM thresholds\n");
1377                 }
1378         }
1379
1380         if (changes & BSS_CHANGED_ARP_FILTER) {
1381                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1382                 iwl_mvm_configure_bcast_filter(mvm, vif);
1383         }
1384 }
1385
1386 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1387                                  struct ieee80211_vif *vif)
1388 {
1389         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1390         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1391         int ret;
1392
1393         mutex_lock(&mvm->mutex);
1394
1395         /* Send the beacon template */
1396         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1397         if (ret)
1398                 goto out_unlock;
1399
1400         /*
1401          * Re-calculate the tsf id, as the master-slave relations depend on the
1402          * beacon interval, which was not known when the AP interface was added.
1403          */
1404         if (vif->type == NL80211_IFTYPE_AP)
1405                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1406
1407         /* Add the mac context */
1408         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1409         if (ret)
1410                 goto out_unlock;
1411
1412         /* Perform the binding */
1413         ret = iwl_mvm_binding_add_vif(mvm, vif);
1414         if (ret)
1415                 goto out_remove;
1416
1417         /* Send the bcast station. At this stage the TBTT and DTIM time events
1418          * are added and applied to the scheduler */
1419         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1420         if (ret)
1421                 goto out_unbind;
1422
1423         /* must be set before quota calculations */
1424         mvmvif->ap_ibss_active = true;
1425
1426         /* power updated needs to be done before quotas */
1427         iwl_mvm_power_update_mac(mvm);
1428
1429         ret = iwl_mvm_update_quotas(mvm, vif);
1430         if (ret)
1431                 goto out_quota_failed;
1432
1433         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1434         if (vif->p2p && mvm->p2p_device_vif)
1435                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1436
1437         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1438
1439         iwl_mvm_bt_coex_vif_change(mvm);
1440
1441         mutex_unlock(&mvm->mutex);
1442         return 0;
1443
1444 out_quota_failed:
1445         iwl_mvm_power_update_mac(mvm);
1446         mvmvif->ap_ibss_active = false;
1447         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1448 out_unbind:
1449         iwl_mvm_binding_remove_vif(mvm, vif);
1450 out_remove:
1451         iwl_mvm_mac_ctxt_remove(mvm, vif);
1452 out_unlock:
1453         mutex_unlock(&mvm->mutex);
1454         return ret;
1455 }
1456
1457 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1458                                  struct ieee80211_vif *vif)
1459 {
1460         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1461         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1462
1463         iwl_mvm_prepare_mac_removal(mvm, vif);
1464
1465         mutex_lock(&mvm->mutex);
1466
1467         mvmvif->ap_ibss_active = false;
1468
1469         iwl_mvm_bt_coex_vif_change(mvm);
1470
1471         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1472
1473         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1474         if (vif->p2p && mvm->p2p_device_vif)
1475                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1476
1477         iwl_mvm_update_quotas(mvm, NULL);
1478         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1479         iwl_mvm_binding_remove_vif(mvm, vif);
1480
1481         iwl_mvm_power_update_mac(mvm);
1482
1483         iwl_mvm_mac_ctxt_remove(mvm, vif);
1484
1485         mutex_unlock(&mvm->mutex);
1486 }
1487
1488 static void
1489 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1490                                  struct ieee80211_vif *vif,
1491                                  struct ieee80211_bss_conf *bss_conf,
1492                                  u32 changes)
1493 {
1494         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1495
1496         /* Changes will be applied when the AP/IBSS is started */
1497         if (!mvmvif->ap_ibss_active)
1498                 return;
1499
1500         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1501                        BSS_CHANGED_BANDWIDTH) &&
1502             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1503                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1504
1505         /* Need to send a new beacon template to the FW */
1506         if (changes & BSS_CHANGED_BEACON &&
1507             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1508                 IWL_WARN(mvm, "Failed updating beacon data\n");
1509 }
1510
1511 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1512                                      struct ieee80211_vif *vif,
1513                                      struct ieee80211_bss_conf *bss_conf,
1514                                      u32 changes)
1515 {
1516         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1517
1518         mutex_lock(&mvm->mutex);
1519
1520         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1521                 iwl_mvm_sched_scan_stop(mvm, true);
1522
1523         switch (vif->type) {
1524         case NL80211_IFTYPE_STATION:
1525                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1526                 break;
1527         case NL80211_IFTYPE_AP:
1528         case NL80211_IFTYPE_ADHOC:
1529                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1530                 break;
1531         default:
1532                 /* shouldn't happen */
1533                 WARN_ON_ONCE(1);
1534         }
1535
1536         mutex_unlock(&mvm->mutex);
1537 }
1538
1539 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1540                                struct ieee80211_vif *vif,
1541                                struct cfg80211_scan_request *req)
1542 {
1543         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1544         int ret;
1545
1546         if (req->n_channels == 0 ||
1547             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1548                 return -EINVAL;
1549
1550         mutex_lock(&mvm->mutex);
1551
1552         switch (mvm->scan_status) {
1553         case IWL_MVM_SCAN_SCHED:
1554                 ret = iwl_mvm_sched_scan_stop(mvm, true);
1555                 if (ret) {
1556                         ret = -EBUSY;
1557                         goto out;
1558                 }
1559                 break;
1560         case IWL_MVM_SCAN_NONE:
1561                 break;
1562         default:
1563                 ret = -EBUSY;
1564                 goto out;
1565         }
1566
1567         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1568
1569         ret = iwl_mvm_scan_request(mvm, vif, req);
1570         if (ret)
1571                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1572 out:
1573         mutex_unlock(&mvm->mutex);
1574         /* make sure to flush the Rx handler before the next scan arrives */
1575         iwl_mvm_wait_for_async_handlers(mvm);
1576         return ret;
1577 }
1578
1579 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1580                                        struct ieee80211_vif *vif)
1581 {
1582         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1583
1584         mutex_lock(&mvm->mutex);
1585
1586         iwl_mvm_cancel_scan(mvm);
1587
1588         mutex_unlock(&mvm->mutex);
1589 }
1590
1591 static void
1592 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1593                                   struct ieee80211_sta *sta, u16 tids,
1594                                   int num_frames,
1595                                   enum ieee80211_frame_release_type reason,
1596                                   bool more_data)
1597 {
1598         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1599
1600         /* Called when we need to transmit (a) frame(s) from mac80211 */
1601
1602         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1603                                           tids, more_data, false);
1604 }
1605
1606 static void
1607 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1608                                     struct ieee80211_sta *sta, u16 tids,
1609                                     int num_frames,
1610                                     enum ieee80211_frame_release_type reason,
1611                                     bool more_data)
1612 {
1613         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1614
1615         /* Called when we need to transmit (a) frame(s) from agg queue */
1616
1617         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1618                                           tids, more_data, true);
1619 }
1620
1621 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1622                                    struct ieee80211_vif *vif,
1623                                    enum sta_notify_cmd cmd,
1624                                    struct ieee80211_sta *sta)
1625 {
1626         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1627         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1628         int tid;
1629
1630         switch (cmd) {
1631         case STA_NOTIFY_SLEEP:
1632                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1633                         ieee80211_sta_block_awake(hw, sta, true);
1634                 spin_lock_bh(&mvmsta->lock);
1635                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1636                         struct iwl_mvm_tid_data *tid_data;
1637
1638                         tid_data = &mvmsta->tid_data[tid];
1639                         if (tid_data->state != IWL_AGG_ON &&
1640                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1641                                 continue;
1642                         if (iwl_mvm_tid_queued(tid_data) == 0)
1643                                 continue;
1644                         ieee80211_sta_set_buffered(sta, tid, true);
1645                 }
1646                 spin_unlock_bh(&mvmsta->lock);
1647                 /*
1648                  * The fw updates the STA to be asleep. Tx packets on the Tx
1649                  * queues to this station will not be transmitted. The fw will
1650                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1651                  */
1652                 break;
1653         case STA_NOTIFY_AWAKE:
1654                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1655                         break;
1656                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1657                 break;
1658         default:
1659                 break;
1660         }
1661 }
1662
1663 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1664                                        struct ieee80211_vif *vif,
1665                                        struct ieee80211_sta *sta)
1666 {
1667         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1668         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1669
1670         /*
1671          * This is called before mac80211 does RCU synchronisation,
1672          * so here we already invalidate our internal RCU-protected
1673          * station pointer. The rest of the code will thus no longer
1674          * be able to find the station this way, and we don't rely
1675          * on further RCU synchronisation after the sta_state()
1676          * callback deleted the station.
1677          */
1678         mutex_lock(&mvm->mutex);
1679         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1680                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1681                                    ERR_PTR(-ENOENT));
1682         mutex_unlock(&mvm->mutex);
1683 }
1684
1685 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1686                                  struct ieee80211_vif *vif,
1687                                  struct ieee80211_sta *sta,
1688                                  enum ieee80211_sta_state old_state,
1689                                  enum ieee80211_sta_state new_state)
1690 {
1691         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1692         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1693         int ret;
1694
1695         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1696                            sta->addr, old_state, new_state);
1697
1698         /* this would be a mac80211 bug ... but don't crash */
1699         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1700                 return -EINVAL;
1701
1702         /* if a STA is being removed, reuse its ID */
1703         flush_work(&mvm->sta_drained_wk);
1704
1705         mutex_lock(&mvm->mutex);
1706         if (old_state == IEEE80211_STA_NOTEXIST &&
1707             new_state == IEEE80211_STA_NONE) {
1708                 /*
1709                  * Firmware bug - it'll crash if the beacon interval is less
1710                  * than 16. We can't avoid connecting at all, so refuse the
1711                  * station state change, this will cause mac80211 to abandon
1712                  * attempts to connect to this AP, and eventually wpa_s will
1713                  * blacklist the AP...
1714                  */
1715                 if (vif->type == NL80211_IFTYPE_STATION &&
1716                     vif->bss_conf.beacon_int < 16) {
1717                         IWL_ERR(mvm,
1718                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1719                                 sta->addr, vif->bss_conf.beacon_int);
1720                         ret = -EINVAL;
1721                         goto out_unlock;
1722                 }
1723                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1724         } else if (old_state == IEEE80211_STA_NONE &&
1725                    new_state == IEEE80211_STA_AUTH) {
1726                 /*
1727                  * EBS may be disabled due to previous failures reported by FW.
1728                  * Reset EBS status here assuming environment has been changed.
1729                  */
1730                 mvm->last_ebs_successful = true;
1731                 ret = 0;
1732         } else if (old_state == IEEE80211_STA_AUTH &&
1733                    new_state == IEEE80211_STA_ASSOC) {
1734                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1735                 if (ret == 0)
1736                         iwl_mvm_rs_rate_init(mvm, sta,
1737                                              mvmvif->phy_ctxt->channel->band,
1738                                              true);
1739         } else if (old_state == IEEE80211_STA_ASSOC &&
1740                    new_state == IEEE80211_STA_AUTHORIZED) {
1741                 /* enable beacon filtering */
1742                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1743                 ret = 0;
1744         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1745                    new_state == IEEE80211_STA_ASSOC) {
1746                 /* disable beacon filtering */
1747                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
1748                 ret = 0;
1749         } else if (old_state == IEEE80211_STA_ASSOC &&
1750                    new_state == IEEE80211_STA_AUTH) {
1751                 ret = 0;
1752         } else if (old_state == IEEE80211_STA_AUTH &&
1753                    new_state == IEEE80211_STA_NONE) {
1754                 ret = 0;
1755         } else if (old_state == IEEE80211_STA_NONE &&
1756                    new_state == IEEE80211_STA_NOTEXIST) {
1757                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1758         } else {
1759                 ret = -EIO;
1760         }
1761  out_unlock:
1762         mutex_unlock(&mvm->mutex);
1763
1764         return ret;
1765 }
1766
1767 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1768 {
1769         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1770
1771         mvm->rts_threshold = value;
1772
1773         return 0;
1774 }
1775
1776 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1777                                   struct ieee80211_vif *vif,
1778                                   struct ieee80211_sta *sta, u32 changed)
1779 {
1780         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1781
1782         if (vif->type == NL80211_IFTYPE_STATION &&
1783             changed & IEEE80211_RC_NSS_CHANGED)
1784                 iwl_mvm_sf_update(mvm, vif, false);
1785 }
1786
1787 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1788                                struct ieee80211_vif *vif, u16 ac,
1789                                const struct ieee80211_tx_queue_params *params)
1790 {
1791         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1792         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1793
1794         mvmvif->queue_params[ac] = *params;
1795
1796         /*
1797          * No need to update right away, we'll get BSS_CHANGED_QOS
1798          * The exception is P2P_DEVICE interface which needs immediate update.
1799          */
1800         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1801                 int ret;
1802
1803                 mutex_lock(&mvm->mutex);
1804                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1805                 mutex_unlock(&mvm->mutex);
1806                 return ret;
1807         }
1808         return 0;
1809 }
1810
1811 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1812                                       struct ieee80211_vif *vif)
1813 {
1814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1815         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1816                            200 + vif->bss_conf.beacon_int);
1817         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1818                                100 + vif->bss_conf.beacon_int);
1819
1820         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1821                 return;
1822
1823         mutex_lock(&mvm->mutex);
1824         /* Try really hard to protect the session and hear a beacon */
1825         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1826         mutex_unlock(&mvm->mutex);
1827 }
1828
1829 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1830                                         struct ieee80211_vif *vif,
1831                                         struct cfg80211_sched_scan_request *req,
1832                                         struct ieee80211_sched_scan_ies *ies)
1833 {
1834         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1835         int ret;
1836
1837         mutex_lock(&mvm->mutex);
1838
1839         if (!iwl_mvm_is_idle(mvm)) {
1840                 ret = -EBUSY;
1841                 goto out;
1842         }
1843
1844         switch (mvm->scan_status) {
1845         case IWL_MVM_SCAN_OS:
1846                 IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n");
1847                 ret = iwl_mvm_cancel_scan(mvm);
1848                 if (ret) {
1849                         ret = -EBUSY;
1850                         goto out;
1851                 }
1852
1853                 /*
1854                  * iwl_mvm_rx_scan_complete() will be called soon but will
1855                  * not reset the scan status as it won't be IWL_MVM_SCAN_OS
1856                  * any more since we queue the next scan immediately (below).
1857                  * We make sure it is called before the next scan starts by
1858                  * flushing the async-handlers work.
1859                  */
1860                 break;
1861         case IWL_MVM_SCAN_NONE:
1862                 break;
1863         default:
1864                 ret = -EBUSY;
1865                 goto out;
1866         }
1867
1868         mvm->scan_status = IWL_MVM_SCAN_SCHED;
1869
1870         ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1871         if (ret)
1872                 goto err;
1873
1874         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1875         if (ret)
1876                 goto err;
1877
1878         ret = iwl_mvm_sched_scan_start(mvm, req);
1879         if (!ret)
1880                 goto out;
1881 err:
1882         mvm->scan_status = IWL_MVM_SCAN_NONE;
1883 out:
1884         mutex_unlock(&mvm->mutex);
1885         /* make sure to flush the Rx handler before the next scan arrives */
1886         iwl_mvm_wait_for_async_handlers(mvm);
1887         return ret;
1888 }
1889
1890 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
1891                                        struct ieee80211_vif *vif)
1892 {
1893         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1894         int ret;
1895
1896         mutex_lock(&mvm->mutex);
1897         ret = iwl_mvm_sched_scan_stop(mvm, false);
1898         mutex_unlock(&mvm->mutex);
1899         iwl_mvm_wait_for_async_handlers(mvm);
1900
1901         return ret;
1902 }
1903
1904 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1905                                enum set_key_cmd cmd,
1906                                struct ieee80211_vif *vif,
1907                                struct ieee80211_sta *sta,
1908                                struct ieee80211_key_conf *key)
1909 {
1910         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1911         int ret;
1912
1913         if (iwlwifi_mod_params.sw_crypto) {
1914                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1915                 return -EOPNOTSUPP;
1916         }
1917
1918         switch (key->cipher) {
1919         case WLAN_CIPHER_SUITE_TKIP:
1920                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1921                 /* fall-through */
1922         case WLAN_CIPHER_SUITE_CCMP:
1923                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1924                 break;
1925         case WLAN_CIPHER_SUITE_AES_CMAC:
1926                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1927                 break;
1928         case WLAN_CIPHER_SUITE_WEP40:
1929         case WLAN_CIPHER_SUITE_WEP104:
1930                 /*
1931                  * Support for TX only, at least for now, so accept
1932                  * the key and do nothing else. Then mac80211 will
1933                  * pass it for TX but we don't have to use it for RX.
1934                  */
1935                 return 0;
1936         default:
1937                 /* currently FW supports only one optional cipher scheme */
1938                 if (hw->n_cipher_schemes &&
1939                     hw->cipher_schemes->cipher == key->cipher)
1940                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
1941                 else
1942                         return -EOPNOTSUPP;
1943         }
1944
1945         mutex_lock(&mvm->mutex);
1946
1947         switch (cmd) {
1948         case SET_KEY:
1949                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1950                      vif->type == NL80211_IFTYPE_AP) && !sta) {
1951                         /*
1952                          * GTK on AP interface is a TX-only key, return 0;
1953                          * on IBSS they're per-station and because we're lazy
1954                          * we don't support them for RX, so do the same.
1955                          */
1956                         ret = 0;
1957                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1958                         break;
1959                 }
1960
1961                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1962                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1963                 if (ret) {
1964                         IWL_WARN(mvm, "set key failed\n");
1965                         /*
1966                          * can't add key for RX, but we don't need it
1967                          * in the device for TX so still return 0
1968                          */
1969                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1970                         ret = 0;
1971                 }
1972
1973                 break;
1974         case DISABLE_KEY:
1975                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1976                         ret = 0;
1977                         break;
1978                 }
1979
1980                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1981                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1982                 break;
1983         default:
1984                 ret = -EINVAL;
1985         }
1986
1987         mutex_unlock(&mvm->mutex);
1988         return ret;
1989 }
1990
1991 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1992                                         struct ieee80211_vif *vif,
1993                                         struct ieee80211_key_conf *keyconf,
1994                                         struct ieee80211_sta *sta,
1995                                         u32 iv32, u16 *phase1key)
1996 {
1997         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1998
1999         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2000                 return;
2001
2002         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2003 }
2004
2005
2006 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2007                        struct ieee80211_vif *vif,
2008                        struct ieee80211_channel *channel,
2009                        int duration,
2010                        enum ieee80211_roc_type type)
2011 {
2012         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2013         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2014         struct cfg80211_chan_def chandef;
2015         struct iwl_mvm_phy_ctxt *phy_ctxt;
2016         int ret, i;
2017
2018         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2019                            duration, type);
2020
2021         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
2022                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
2023                 return -EINVAL;
2024         }
2025
2026         mutex_lock(&mvm->mutex);
2027
2028         for (i = 0; i < NUM_PHY_CTX; i++) {
2029                 phy_ctxt = &mvm->phy_ctxts[i];
2030                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2031                         continue;
2032
2033                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2034                         /*
2035                          * Unbind the P2P_DEVICE from the current PHY context,
2036                          * and if the PHY context is not used remove it.
2037                          */
2038                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2039                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2040                                 goto out_unlock;
2041
2042                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2043
2044                         /* Bind the P2P_DEVICE to the current PHY Context */
2045                         mvmvif->phy_ctxt = phy_ctxt;
2046
2047                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2048                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2049                                 goto out_unlock;
2050
2051                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2052                         goto schedule_time_event;
2053                 }
2054         }
2055
2056         /* Need to update the PHY context only if the ROC channel changed */
2057         if (channel == mvmvif->phy_ctxt->channel)
2058                 goto schedule_time_event;
2059
2060         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2061
2062         /*
2063          * Change the PHY context configuration as it is currently referenced
2064          * only by the P2P Device MAC
2065          */
2066         if (mvmvif->phy_ctxt->ref == 1) {
2067                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2068                                                &chandef, 1, 1);
2069                 if (ret)
2070                         goto out_unlock;
2071         } else {
2072                 /*
2073                  * The PHY context is shared with other MACs. Need to remove the
2074                  * P2P Device from the binding, allocate an new PHY context and
2075                  * create a new binding
2076                  */
2077                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2078                 if (!phy_ctxt) {
2079                         ret = -ENOSPC;
2080                         goto out_unlock;
2081                 }
2082
2083                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2084                                                1, 1);
2085                 if (ret) {
2086                         IWL_ERR(mvm, "Failed to change PHY context\n");
2087                         goto out_unlock;
2088                 }
2089
2090                 /* Unbind the P2P_DEVICE from the current PHY context */
2091                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2092                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2093                         goto out_unlock;
2094
2095                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2096
2097                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2098                 mvmvif->phy_ctxt = phy_ctxt;
2099
2100                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2101                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2102                         goto out_unlock;
2103
2104                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2105         }
2106
2107 schedule_time_event:
2108         /* Schedule the time events */
2109         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2110
2111 out_unlock:
2112         mutex_unlock(&mvm->mutex);
2113         IWL_DEBUG_MAC80211(mvm, "leave\n");
2114         return ret;
2115 }
2116
2117 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2118 {
2119         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2120
2121         IWL_DEBUG_MAC80211(mvm, "enter\n");
2122
2123         mutex_lock(&mvm->mutex);
2124         iwl_mvm_stop_p2p_roc(mvm);
2125         mutex_unlock(&mvm->mutex);
2126
2127         IWL_DEBUG_MAC80211(mvm, "leave\n");
2128         return 0;
2129 }
2130
2131 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2132                                struct ieee80211_chanctx_conf *ctx)
2133 {
2134         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2135         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2136         struct iwl_mvm_phy_ctxt *phy_ctxt;
2137         int ret;
2138
2139         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2140
2141         mutex_lock(&mvm->mutex);
2142         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2143         if (!phy_ctxt) {
2144                 ret = -ENOSPC;
2145                 goto out;
2146         }
2147
2148         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2149                                        ctx->rx_chains_static,
2150                                        ctx->rx_chains_dynamic);
2151         if (ret) {
2152                 IWL_ERR(mvm, "Failed to add PHY context\n");
2153                 goto out;
2154         }
2155
2156         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2157         *phy_ctxt_id = phy_ctxt->id;
2158 out:
2159         mutex_unlock(&mvm->mutex);
2160         return ret;
2161 }
2162
2163 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2164                                    struct ieee80211_chanctx_conf *ctx)
2165 {
2166         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2167         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2168         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2169
2170         mutex_lock(&mvm->mutex);
2171         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2172         mutex_unlock(&mvm->mutex);
2173 }
2174
2175 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2176                                    struct ieee80211_chanctx_conf *ctx,
2177                                    u32 changed)
2178 {
2179         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2180         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2181         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2182
2183         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2184                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2185                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2186                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2187                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2188                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2189                       phy_ctxt->ref, changed))
2190                 return;
2191
2192         mutex_lock(&mvm->mutex);
2193         iwl_mvm_bt_coex_vif_change(mvm);
2194         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2195                                  ctx->rx_chains_static,
2196                                  ctx->rx_chains_dynamic);
2197         mutex_unlock(&mvm->mutex);
2198 }
2199
2200 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2201                                       struct ieee80211_vif *vif,
2202                                       struct ieee80211_chanctx_conf *ctx)
2203 {
2204         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2205         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2206         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2207         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2208         int ret;
2209
2210         mutex_lock(&mvm->mutex);
2211
2212         mvmvif->phy_ctxt = phy_ctxt;
2213
2214         switch (vif->type) {
2215         case NL80211_IFTYPE_AP:
2216                 /* Unless it's a CSA flow we have nothing to do here */
2217                 if (vif->csa_active) {
2218                         mvmvif->ap_ibss_active = true;
2219                         break;
2220                 }
2221         case NL80211_IFTYPE_ADHOC:
2222                 /*
2223                  * The AP binding flow is handled as part of the start_ap flow
2224                  * (in bss_info_changed), similarly for IBSS.
2225                  */
2226                 ret = 0;
2227                 goto out_unlock;
2228         case NL80211_IFTYPE_STATION:
2229         case NL80211_IFTYPE_MONITOR:
2230                 break;
2231         default:
2232                 ret = -EINVAL;
2233                 goto out_unlock;
2234         }
2235
2236         ret = iwl_mvm_binding_add_vif(mvm, vif);
2237         if (ret)
2238                 goto out_unlock;
2239
2240         /*
2241          * Power state must be updated before quotas,
2242          * otherwise fw will complain.
2243          */
2244         iwl_mvm_power_update_mac(mvm);
2245
2246         /* Setting the quota at this stage is only required for monitor
2247          * interfaces. For the other types, the bss_info changed flow
2248          * will handle quota settings.
2249          */
2250         if (vif->type == NL80211_IFTYPE_MONITOR) {
2251                 mvmvif->monitor_active = true;
2252                 ret = iwl_mvm_update_quotas(mvm, vif);
2253                 if (ret)
2254                         goto out_remove_binding;
2255         }
2256
2257         /* Handle binding during CSA */
2258         if (vif->type == NL80211_IFTYPE_AP) {
2259                 iwl_mvm_update_quotas(mvm, vif);
2260                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2261         }
2262
2263         goto out_unlock;
2264
2265  out_remove_binding:
2266         iwl_mvm_binding_remove_vif(mvm, vif);
2267         iwl_mvm_power_update_mac(mvm);
2268  out_unlock:
2269         mutex_unlock(&mvm->mutex);
2270         if (ret)
2271                 mvmvif->phy_ctxt = NULL;
2272         return ret;
2273 }
2274
2275 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2276                                          struct ieee80211_vif *vif,
2277                                          struct ieee80211_chanctx_conf *ctx)
2278 {
2279         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2280         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2281
2282         mutex_lock(&mvm->mutex);
2283
2284         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2285
2286         switch (vif->type) {
2287         case NL80211_IFTYPE_ADHOC:
2288                 goto out_unlock;
2289         case NL80211_IFTYPE_MONITOR:
2290                 mvmvif->monitor_active = false;
2291                 iwl_mvm_update_quotas(mvm, NULL);
2292                 break;
2293         case NL80211_IFTYPE_AP:
2294                 /* This part is triggered only during CSA */
2295                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2296                         goto out_unlock;
2297
2298                 mvmvif->ap_ibss_active = false;
2299                 iwl_mvm_update_quotas(mvm, NULL);
2300                 /*TODO: bt_coex notification here? */
2301         default:
2302                 break;
2303         }
2304
2305         iwl_mvm_binding_remove_vif(mvm, vif);
2306
2307 out_unlock:
2308         mvmvif->phy_ctxt = NULL;
2309         iwl_mvm_power_update_mac(mvm);
2310         mutex_unlock(&mvm->mutex);
2311 }
2312
2313 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2314                            struct ieee80211_sta *sta,
2315                            bool set)
2316 {
2317         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2318         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2319
2320         if (!mvm_sta || !mvm_sta->vif) {
2321                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2322                 return -EINVAL;
2323         }
2324
2325         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2326 }
2327
2328 #ifdef CONFIG_NL80211_TESTMODE
2329 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2330         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2331         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2332         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2333 };
2334
2335 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2336                                       struct ieee80211_vif *vif,
2337                                       void *data, int len)
2338 {
2339         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2340         int err;
2341         u32 noa_duration;
2342
2343         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2344         if (err)
2345                 return err;
2346
2347         if (!tb[IWL_MVM_TM_ATTR_CMD])
2348                 return -EINVAL;
2349
2350         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2351         case IWL_MVM_TM_CMD_SET_NOA:
2352                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2353                     !vif->bss_conf.enable_beacon ||
2354                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2355                         return -EINVAL;
2356
2357                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2358                 if (noa_duration >= vif->bss_conf.beacon_int)
2359                         return -EINVAL;
2360
2361                 mvm->noa_duration = noa_duration;
2362                 mvm->noa_vif = vif;
2363
2364                 return iwl_mvm_update_quotas(mvm, NULL);
2365         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2366                 /* must be associated client vif - ignore authorized */
2367                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2368                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2369                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2370                         return -EINVAL;
2371
2372                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2373                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2374                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2375         }
2376
2377         return -EOPNOTSUPP;
2378 }
2379
2380 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2381                                     struct ieee80211_vif *vif,
2382                                     void *data, int len)
2383 {
2384         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2385         int err;
2386
2387         mutex_lock(&mvm->mutex);
2388         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2389         mutex_unlock(&mvm->mutex);
2390
2391         return err;
2392 }
2393 #endif
2394
2395 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2396                                           struct ieee80211_vif *vif,
2397                                           struct cfg80211_chan_def *chandef)
2398 {
2399         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2400
2401         mutex_lock(&mvm->mutex);
2402         if (WARN(mvm->csa_vif && mvm->csa_vif->csa_active,
2403                  "Another CSA is already in progress"))
2404                 goto out_unlock;
2405
2406         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2407                            chandef->center_freq1);
2408         mvm->csa_vif = vif;
2409
2410 out_unlock:
2411         mutex_unlock(&mvm->mutex);
2412 }
2413
2414 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2415                               struct ieee80211_vif *vif, u32 queues, bool drop)
2416 {
2417         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2418         struct iwl_mvm_vif *mvmvif;
2419         struct iwl_mvm_sta *mvmsta;
2420
2421         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2422                 return;
2423
2424         mutex_lock(&mvm->mutex);
2425         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2426         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2427
2428         if (WARN_ON_ONCE(!mvmsta))
2429                 goto done;
2430
2431         if (drop) {
2432                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2433                         IWL_ERR(mvm, "flush request fail\n");
2434         } else {
2435                 iwl_trans_wait_tx_queue_empty(mvm->trans,
2436                                               mvmsta->tfd_queue_msk);
2437         }
2438 done:
2439         mutex_unlock(&mvm->mutex);
2440 }
2441
2442 const struct ieee80211_ops iwl_mvm_hw_ops = {
2443         .tx = iwl_mvm_mac_tx,
2444         .ampdu_action = iwl_mvm_mac_ampdu_action,
2445         .start = iwl_mvm_mac_start,
2446         .restart_complete = iwl_mvm_mac_restart_complete,
2447         .stop = iwl_mvm_mac_stop,
2448         .add_interface = iwl_mvm_mac_add_interface,
2449         .remove_interface = iwl_mvm_mac_remove_interface,
2450         .config = iwl_mvm_mac_config,
2451         .prepare_multicast = iwl_mvm_prepare_multicast,
2452         .configure_filter = iwl_mvm_configure_filter,
2453         .bss_info_changed = iwl_mvm_bss_info_changed,
2454         .hw_scan = iwl_mvm_mac_hw_scan,
2455         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
2456         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
2457         .sta_state = iwl_mvm_mac_sta_state,
2458         .sta_notify = iwl_mvm_mac_sta_notify,
2459         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
2460         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
2461         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
2462         .sta_rc_update = iwl_mvm_sta_rc_update,
2463         .conf_tx = iwl_mvm_mac_conf_tx,
2464         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
2465         .flush = iwl_mvm_mac_flush,
2466         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
2467         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
2468         .set_key = iwl_mvm_mac_set_key,
2469         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
2470         .remain_on_channel = iwl_mvm_roc,
2471         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
2472         .add_chanctx = iwl_mvm_add_chanctx,
2473         .remove_chanctx = iwl_mvm_remove_chanctx,
2474         .change_chanctx = iwl_mvm_change_chanctx,
2475         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
2476         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
2477
2478         .start_ap = iwl_mvm_start_ap_ibss,
2479         .stop_ap = iwl_mvm_stop_ap_ibss,
2480         .join_ibss = iwl_mvm_start_ap_ibss,
2481         .leave_ibss = iwl_mvm_stop_ap_ibss,
2482
2483         .set_tim = iwl_mvm_set_tim,
2484
2485         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
2486
2487         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
2488
2489 #ifdef CONFIG_PM_SLEEP
2490         /* look at d3.c */
2491         .suspend = iwl_mvm_suspend,
2492         .resume = iwl_mvm_resume,
2493         .set_wakeup = iwl_mvm_set_wakeup,
2494         .set_rekey_data = iwl_mvm_set_rekey_data,
2495 #if IS_ENABLED(CONFIG_IPV6)
2496         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
2497 #endif
2498         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
2499 #endif
2500 };