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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
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   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
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  20  * along with this program; if not, write to the Free Software
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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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_P2P_GO_OPPPS;
 378
 379         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 380
 381         /* currently FW API supports only one optional cipher scheme */
 382         if (mvm->fw->cs[0].cipher) {
 383                 mvm->hw->n_cipher_schemes = 1;
 384                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 385         }
 386
 387 #ifdef CONFIG_PM_SLEEP
 388         if (iwl_mvm_is_d0i3_supported(mvm) &&
 389             device_can_wakeup(mvm->trans->dev)) {
 390                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 391                 hw->wiphy->wowlan = &mvm->wowlan;
 392         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 393             mvm->trans->ops->d3_suspend &&
 394             mvm->trans->ops->d3_resume &&
 395             device_can_wakeup(mvm->trans->dev)) {
 396                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 397                                     WIPHY_WOWLAN_DISCONNECT |
 398                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 399                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 400                 if (!iwlwifi_mod_params.sw_crypto)
 401                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 402                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 403                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 404
 405                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 406                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 407                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 408                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 409                 hw->wiphy->wowlan = &mvm->wowlan;
 410         }
 411 #endif
 412
 413 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 414         /* assign default bcast filtering configuration */
 415         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 416 #endif
 417
 418         ret = iwl_mvm_leds_init(mvm);
 419         if (ret)
 420                 return ret;
 421
 422         ret = ieee80211_register_hw(mvm->hw);
 423         if (ret)
 424                 iwl_mvm_leds_exit(mvm);
 425
 426         return ret;
 427 }
 428
 429 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 430                              struct ieee80211_sta *sta,
 431                              struct sk_buff *skb)
 432 {
 433         struct iwl_mvm_sta *mvmsta;
 434         bool defer = false;
 435
 436         /*
 437          * double check the IN_D0I3 flag both before and after
 438          * taking the spinlock, in order to prevent taking
 439          * the spinlock when not needed.
 440          */
 441         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 442                 return false;
 443
 444         spin_lock(&mvm->d0i3_tx_lock);
 445         /*
 446          * testing the flag again ensures the skb dequeue
 447          * loop (on d0i3 exit) hasn't run yet.
 448          */
 449         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 450                 goto out;
 451
 452         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 453         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 454             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 455                 goto out;
 456
 457         __skb_queue_tail(&mvm->d0i3_tx, skb);
 458         ieee80211_stop_queues(mvm->hw);
 459
 460         /* trigger wakeup */
 461         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 462         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 463
 464         defer = true;
 465 out:
 466         spin_unlock(&mvm->d0i3_tx_lock);
 467         return defer;
 468 }
 469
 470 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 471                            struct ieee80211_tx_control *control,
 472                            struct sk_buff *skb)
 473 {
 474         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 475         struct ieee80211_sta *sta = control->sta;
 476         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 477         struct ieee80211_hdr *hdr = (void *)skb->data;
 478
 479         if (iwl_mvm_is_radio_killed(mvm)) {
 480                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 481                 goto drop;
 482         }
 483
 484         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 485             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 486                 goto drop;
 487
 488         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 489         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 490                      ieee80211_is_mgmt(hdr->frame_control) &&
 491                      !ieee80211_is_deauth(hdr->frame_control) &&
 492                      !ieee80211_is_disassoc(hdr->frame_control) &&
 493                      !ieee80211_is_action(hdr->frame_control)))
 494                 sta = NULL;
 495
 496         if (sta) {
 497                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 498                         return;
 499                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 500                         goto drop;
 501                 return;
 502         }
 503
 504         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 505                 goto drop;
 506         return;
 507  drop:
 508         ieee80211_free_txskb(hw, skb);
 509 }
 510
 511 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 512 {
 513         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 514                 return false;
 515         return true;
 516 }
 517
 518 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 519 {
 520         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 521                 return false;
 522         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 523                 return true;
 524
 525         /* enabled by default */
 526         return true;
 527 }
 528
 529 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 530                                     struct ieee80211_vif *vif,
 531                                     enum ieee80211_ampdu_mlme_action action,
 532                                     struct ieee80211_sta *sta, u16 tid,
 533                                     u16 *ssn, u8 buf_size)
 534 {
 535         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 536         int ret;
 537         bool tx_agg_ref = false;
 538
 539         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 540                      sta->addr, tid, action);
 541
 542         if (!(mvm->nvm_data->sku_cap_11n_enable))
 543                 return -EACCES;
 544
 545         /* return from D0i3 before starting a new Tx aggregation */
 546         switch (action) {
 547         case IEEE80211_AMPDU_TX_START:
 548         case IEEE80211_AMPDU_TX_STOP_CONT:
 549         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 550         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 551         case IEEE80211_AMPDU_TX_OPERATIONAL:
 552                 iwl_mvm_ref(mvm, IWL_MVM_REF_TX_AGG);
 553                 tx_agg_ref = true;
 554
 555                 /*
 556                  * for tx start, wait synchronously until D0i3 exit to
 557                  * get the correct sequence number for the tid.
 558                  * additionally, some other ampdu actions use direct
 559                  * target access, which is not handled automatically
 560                  * by the trans layer (unlike commands), so wait for
 561                  * d0i3 exit in these cases as well.
 562                  */
 563                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 564                           !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status), HZ)) {
 565                         WARN_ON_ONCE(1);
 566                         iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 567                         return -EIO;
 568                 }
 569                 break;
 570         default:
 571                 break;
 572         }
 573
 574         mutex_lock(&mvm->mutex);
 575
 576         switch (action) {
 577         case IEEE80211_AMPDU_RX_START:
 578                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 579                         ret = -EINVAL;
 580                         break;
 581                 }
 582                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 583                 break;
 584         case IEEE80211_AMPDU_RX_STOP:
 585                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 586                 break;
 587         case IEEE80211_AMPDU_TX_START:
 588                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 589                         ret = -EINVAL;
 590                         break;
 591                 }
 592                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 593                 break;
 594         case IEEE80211_AMPDU_TX_STOP_CONT:
 595                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 596                 break;
 597         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 598         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 599                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 600                 break;
 601         case IEEE80211_AMPDU_TX_OPERATIONAL:
 602                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 603                 break;
 604         default:
 605                 WARN_ON_ONCE(1);
 606                 ret = -EINVAL;
 607                 break;
 608         }
 609         mutex_unlock(&mvm->mutex);
 610
 611         /*
 612          * If the tid is marked as started, we won't use it for offloaded
 613          * traffic on the next D0i3 entry. It's safe to unref.
 614          */
 615         if (tx_agg_ref)
 616                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 617
 618         return ret;
 619 }
 620
 621 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 622                                      struct ieee80211_vif *vif)
 623 {
 624         struct iwl_mvm *mvm = data;
 625         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 626
 627         mvmvif->uploaded = false;
 628         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 629
 630         /* does this make sense at all? */
 631         mvmvif->color++;
 632
 633         spin_lock_bh(&mvm->time_event_lock);
 634         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 635         spin_unlock_bh(&mvm->time_event_lock);
 636
 637         mvmvif->phy_ctxt = NULL;
 638 }
 639
 640 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 641 {
 642 #ifdef CONFIG_IWLWIFI_DEBUGFS
 643         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 644
 645         iwl_mvm_fw_error_dump(mvm);
 646
 647         /* notify the userspace about the error we had */
 648         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 649 #endif
 650
 651         iwl_trans_stop_device(mvm->trans);
 652
 653         mvm->scan_status = IWL_MVM_SCAN_NONE;
 654
 655         /* just in case one was running */
 656         ieee80211_remain_on_channel_expired(mvm->hw);
 657
 658         ieee80211_iterate_active_interfaces_atomic(
 659                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 660                 iwl_mvm_cleanup_iterator, mvm);
 661
 662         mvm->p2p_device_vif = NULL;
 663         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 664
 665         iwl_mvm_reset_phy_ctxts(mvm);
 666         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 667         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 668
 669         ieee80211_wake_queues(mvm->hw);
 670
 671         /* cleanup all stale references (scan, roc), but keep the
 672          * ucode_down ref until reconfig is complete */
 673         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 674
 675         mvm->vif_count = 0;
 676         mvm->rx_ba_sessions = 0;
 677 }
 678
 679 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 680 {
 681         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 682         int ret;
 683
 684         mutex_lock(&mvm->mutex);
 685
 686         /* Clean up some internal and mac80211 state on restart */
 687         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 688                 iwl_mvm_restart_cleanup(mvm);
 689
 690         ret = iwl_mvm_up(mvm);
 691         mutex_unlock(&mvm->mutex);
 692
 693         return ret;
 694 }
 695
 696 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 697 {
 698         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 699         int ret;
 700
 701         mutex_lock(&mvm->mutex);
 702
 703         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 704         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 705         ret = iwl_mvm_update_quotas(mvm, NULL);
 706         if (ret)
 707                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 708                         ret);
 709
 710         /* allow transport/FW low power modes */
 711         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 712
 713         mutex_unlock(&mvm->mutex);
 714 }
 715
 716 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 717 {
 718         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 719
 720         flush_work(&mvm->d0i3_exit_work);
 721         flush_work(&mvm->async_handlers_wk);
 722
 723         mutex_lock(&mvm->mutex);
 724
 725         /* disallow low power states when the FW is down */
 726         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 727
 728         /* async_handlers_wk is now blocked */
 729
 730         /*
 731          * The work item could be running or queued if the
 732          * ROC time event stops just as we get here.
 733          */
 734         cancel_work_sync(&mvm->roc_done_wk);
 735
 736         iwl_trans_stop_device(mvm->trans);
 737
 738         iwl_mvm_async_handlers_purge(mvm);
 739         /* async_handlers_list is empty and will stay empty: HW is stopped */
 740
 741         /* the fw is stopped, the aux sta is dead: clean up driver state */
 742         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 743
 744         mutex_unlock(&mvm->mutex);
 745
 746         /*
 747          * The worker might have been waiting for the mutex, let it run and
 748          * discover that its list is now empty.
 749          */
 750         cancel_work_sync(&mvm->async_handlers_wk);
 751 }
 752
 753 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 754 {
 755         u16 i;
 756
 757         lockdep_assert_held(&mvm->mutex);
 758
 759         for (i = 0; i < NUM_PHY_CTX; i++)
 760                 if (!mvm->phy_ctxts[i].ref)
 761                         return &mvm->phy_ctxts[i];
 762
 763         IWL_ERR(mvm, "No available PHY context\n");
 764         return NULL;
 765 }
 766
 767 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 768                                 s8 tx_power)
 769 {
 770         /* FW is in charge of regulatory enforcement */
 771         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 772                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 773                 .pwr_restriction = cpu_to_le16(tx_power),
 774         };
 775
 776         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 777                                     sizeof(reduce_txpwr_cmd),
 778                                     &reduce_txpwr_cmd);
 779 }
 780
 781 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 782                                      struct ieee80211_vif *vif)
 783 {
 784         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 785         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 786         int ret;
 787
 788         /*
 789          * Not much to do here. The stack will not allow interface
 790          * types or combinations that we didn't advertise, so we
 791          * don't really have to check the types.
 792          */
 793
 794         mutex_lock(&mvm->mutex);
 795
 796         /* Allocate resources for the MAC context, and add it to the fw  */
 797         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 798         if (ret)
 799                 goto out_unlock;
 800
 801         /* Counting number of interfaces is needed for legacy PM */
 802         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 803                 mvm->vif_count++;
 804
 805         /*
 806          * The AP binding flow can be done only after the beacon
 807          * template is configured (which happens only in the mac80211
 808          * start_ap() flow), and adding the broadcast station can happen
 809          * only after the binding.
 810          * In addition, since modifying the MAC before adding a bcast
 811          * station is not allowed by the FW, delay the adding of MAC context to
 812          * the point where we can also add the bcast station.
 813          * In short: there's not much we can do at this point, other than
 814          * allocating resources :)
 815          */
 816         if (vif->type == NL80211_IFTYPE_AP ||
 817             vif->type == NL80211_IFTYPE_ADHOC) {
 818                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 819                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 820                                                qmask,
 821                                                ieee80211_vif_type_p2p(vif));
 822                 if (ret) {
 823                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 824                         goto out_release;
 825                 }
 826
 827                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 828                 goto out_unlock;
 829         }
 830
 831         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 832         if (ret)
 833                 goto out_release;
 834
 835         ret = iwl_mvm_power_update_mac(mvm);
 836         if (ret)
 837                 goto out_release;
 838
 839         /* beacon filtering */
 840         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 841         if (ret)
 842                 goto out_remove_mac;
 843
 844         if (!mvm->bf_allowed_vif &&
 845             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 846                 mvm->bf_allowed_vif = mvmvif;
 847                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 848                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 849         }
 850
 851         /*
 852          * P2P_DEVICE interface does not have a channel context assigned to it,
 853          * so a dedicated PHY context is allocated to it and the corresponding
 854          * MAC context is bound to it at this stage.
 855          */
 856         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 857
 858                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
 859                 if (!mvmvif->phy_ctxt) {
 860                         ret = -ENOSPC;
 861                         goto out_free_bf;
 862                 }
 863
 864                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
 865                 ret = iwl_mvm_binding_add_vif(mvm, vif);
 866                 if (ret)
 867                         goto out_unref_phy;
 868
 869                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
 870                 if (ret)
 871                         goto out_unbind;
 872
 873                 /* Save a pointer to p2p device vif, so it can later be used to
 874                  * update the p2p device MAC when a GO is started/stopped */
 875                 mvm->p2p_device_vif = vif;
 876         }
 877
 878         iwl_mvm_vif_dbgfs_register(mvm, vif);
 879         goto out_unlock;
 880
 881  out_unbind:
 882         iwl_mvm_binding_remove_vif(mvm, vif);
 883  out_unref_phy:
 884         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 885  out_free_bf:
 886         if (mvm->bf_allowed_vif == mvmvif) {
 887                 mvm->bf_allowed_vif = NULL;
 888                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 889                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 890         }
 891  out_remove_mac:
 892         mvmvif->phy_ctxt = NULL;
 893         iwl_mvm_mac_ctxt_remove(mvm, vif);
 894  out_release:
 895         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 896                 mvm->vif_count--;
 897
 898         iwl_mvm_mac_ctxt_release(mvm, vif);
 899  out_unlock:
 900         mutex_unlock(&mvm->mutex);
 901
 902         return ret;
 903 }
 904
 905 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 906                                         struct ieee80211_vif *vif)
 907 {
 908         u32 tfd_msk = 0, ac;
 909
 910         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 911                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 912                         tfd_msk |= BIT(vif->hw_queue[ac]);
 913
 914         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 915                 tfd_msk |= BIT(vif->cab_queue);
 916
 917         if (tfd_msk) {
 918                 mutex_lock(&mvm->mutex);
 919                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
 920                 mutex_unlock(&mvm->mutex);
 921         }
 922
 923         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 924                 /*
 925                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
 926                  * We assume here that all the packets sent to the OFFCHANNEL
 927                  * queue are sent in ROC session.
 928                  */
 929                 flush_work(&mvm->roc_done_wk);
 930         } else {
 931                 /*
 932                  * By now, all the AC queues are empty. The AGG queues are
 933                  * empty too. We already got all the Tx responses for all the
 934                  * packets in the queues. The drain work can have been
 935                  * triggered. Flush it.
 936                  */
 937                 flush_work(&mvm->sta_drained_wk);
 938         }
 939 }
 940
 941 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
 942                                          struct ieee80211_vif *vif)
 943 {
 944         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 945         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 946
 947         iwl_mvm_prepare_mac_removal(mvm, vif);
 948
 949         mutex_lock(&mvm->mutex);
 950
 951         if (mvm->bf_allowed_vif == mvmvif) {
 952                 mvm->bf_allowed_vif = NULL;
 953                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
 954                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
 955         }
 956
 957         iwl_mvm_vif_dbgfs_clean(mvm, vif);
 958
 959         /*
 960          * For AP/GO interface, the tear down of the resources allocated to the
 961          * interface is be handled as part of the stop_ap flow.
 962          */
 963         if (vif->type == NL80211_IFTYPE_AP ||
 964             vif->type == NL80211_IFTYPE_ADHOC) {
 965 #ifdef CONFIG_NL80211_TESTMODE
 966                 if (vif == mvm->noa_vif) {
 967                         mvm->noa_vif = NULL;
 968                         mvm->noa_duration = 0;
 969                 }
 970 #endif
 971                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 972                 goto out_release;
 973         }
 974
 975         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 976                 mvm->p2p_device_vif = NULL;
 977                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
 978                 iwl_mvm_binding_remove_vif(mvm, vif);
 979                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
 980                 mvmvif->phy_ctxt = NULL;
 981         }
 982
 983         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
 984                 mvm->vif_count--;
 985
 986         iwl_mvm_power_update_mac(mvm);
 987         iwl_mvm_mac_ctxt_remove(mvm, vif);
 988
 989 out_release:
 990         iwl_mvm_mac_ctxt_release(mvm, vif);
 991         mutex_unlock(&mvm->mutex);
 992 }
 993
 994 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
 995 {
 996         return 0;
 997 }
 998
 999 struct iwl_mvm_mc_iter_data {
1000         struct iwl_mvm *mvm;
1001         int port_id;
1002 };
1003
1004 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1005                                       struct ieee80211_vif *vif)
1006 {
1007         struct iwl_mvm_mc_iter_data *data = _data;
1008         struct iwl_mvm *mvm = data->mvm;
1009         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1010         int ret, len;
1011
1012         /* if we don't have free ports, mcast frames will be dropped */
1013         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1014                 return;
1015
1016         if (vif->type != NL80211_IFTYPE_STATION ||
1017             !vif->bss_conf.assoc)
1018                 return;
1019
1020         cmd->port_id = data->port_id++;
1021         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1022         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1023
1024         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1025         if (ret)
1026                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1027 }
1028
1029 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1030 {
1031         struct iwl_mvm_mc_iter_data iter_data = {
1032                 .mvm = mvm,
1033         };
1034
1035         lockdep_assert_held(&mvm->mutex);
1036
1037         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1038                 return;
1039
1040         ieee80211_iterate_active_interfaces_atomic(
1041                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1042                 iwl_mvm_mc_iface_iterator, &iter_data);
1043 }
1044
1045 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1046                                      struct netdev_hw_addr_list *mc_list)
1047 {
1048         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1049         struct iwl_mcast_filter_cmd *cmd;
1050         struct netdev_hw_addr *addr;
1051         int addr_count = netdev_hw_addr_list_count(mc_list);
1052         bool pass_all = false;
1053         int len;
1054
1055         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1056                 pass_all = true;
1057                 addr_count = 0;
1058         }
1059
1060         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1061         cmd = kzalloc(len, GFP_ATOMIC);
1062         if (!cmd)
1063                 return 0;
1064
1065         if (pass_all) {
1066                 cmd->pass_all = 1;
1067                 return (u64)(unsigned long)cmd;
1068         }
1069
1070         netdev_hw_addr_list_for_each(addr, mc_list) {
1071                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1072                                    cmd->count, addr->addr);
1073                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1074                        addr->addr, ETH_ALEN);
1075                 cmd->count++;
1076         }
1077
1078         return (u64)(unsigned long)cmd;
1079 }
1080
1081 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1082                                      unsigned int changed_flags,
1083                                      unsigned int *total_flags,
1084                                      u64 multicast)
1085 {
1086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1087         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1088
1089         mutex_lock(&mvm->mutex);
1090
1091         /* replace previous configuration */
1092         kfree(mvm->mcast_filter_cmd);
1093         mvm->mcast_filter_cmd = cmd;
1094
1095         if (!cmd)
1096                 goto out;
1097
1098         iwl_mvm_recalc_multicast(mvm);
1099 out:
1100         mutex_unlock(&mvm->mutex);
1101         *total_flags = 0;
1102 }
1103
1104 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1105 struct iwl_bcast_iter_data {
1106         struct iwl_mvm *mvm;
1107         struct iwl_bcast_filter_cmd *cmd;
1108         u8 current_filter;
1109 };
1110
1111 static void
1112 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1113                          const struct iwl_fw_bcast_filter *in_filter,
1114                          struct iwl_fw_bcast_filter *out_filter)
1115 {
1116         struct iwl_fw_bcast_filter_attr *attr;
1117         int i;
1118
1119         memcpy(out_filter, in_filter, sizeof(*out_filter));
1120
1121         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1122                 attr = &out_filter->attrs[i];
1123
1124                 if (!attr->mask)
1125                         break;
1126
1127                 switch (attr->reserved1) {
1128                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1129                         if (vif->bss_conf.arp_addr_cnt != 1) {
1130                                 attr->mask = 0;
1131                                 continue;
1132                         }
1133
1134                         attr->val = vif->bss_conf.arp_addr_list[0];
1135                         break;
1136                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1137                         attr->val = *(__be32 *)&vif->addr[2];
1138                         break;
1139                 default:
1140                         break;
1141                 }
1142                 attr->reserved1 = 0;
1143                 out_filter->num_attrs++;
1144         }
1145 }
1146
1147 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1148                                           struct ieee80211_vif *vif)
1149 {
1150         struct iwl_bcast_iter_data *data = _data;
1151         struct iwl_mvm *mvm = data->mvm;
1152         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1153         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1154         struct iwl_fw_bcast_mac *bcast_mac;
1155         int i;
1156
1157         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1158                 return;
1159
1160         bcast_mac = &cmd->macs[mvmvif->id];
1161
1162         /* enable filtering only for associated stations */
1163         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1164                 return;
1165
1166         bcast_mac->default_discard = 1;
1167
1168         /* copy all configured filters */
1169         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1170                 /*
1171                  * Make sure we don't exceed our filters limit.
1172                  * if there is still a valid filter to be configured,
1173                  * be on the safe side and just allow bcast for this mac.
1174                  */
1175                 if (WARN_ON_ONCE(data->current_filter >=
1176                                  ARRAY_SIZE(cmd->filters))) {
1177                         bcast_mac->default_discard = 0;
1178                         bcast_mac->attached_filters = 0;
1179                         break;
1180                 }
1181
1182                 iwl_mvm_set_bcast_filter(vif,
1183                                          &mvm->bcast_filters[i],
1184                                          &cmd->filters[data->current_filter]);
1185
1186                 /* skip current filter if it contains no attributes */
1187                 if (!cmd->filters[data->current_filter].num_attrs)
1188                         continue;
1189
1190                 /* attach the filter to current mac */
1191                 bcast_mac->attached_filters |=
1192                                 cpu_to_le16(BIT(data->current_filter));
1193
1194                 data->current_filter++;
1195         }
1196 }
1197
1198 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1199                                     struct iwl_bcast_filter_cmd *cmd)
1200 {
1201         struct iwl_bcast_iter_data iter_data = {
1202                 .mvm = mvm,
1203                 .cmd = cmd,
1204         };
1205
1206         memset(cmd, 0, sizeof(*cmd));
1207         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1208         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1209
1210 #ifdef CONFIG_IWLWIFI_DEBUGFS
1211         /* use debugfs filters/macs if override is configured */
1212         if (mvm->dbgfs_bcast_filtering.override) {
1213                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1214                        sizeof(cmd->filters));
1215                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1216                        sizeof(cmd->macs));
1217                 return true;
1218         }
1219 #endif
1220
1221         /* if no filters are configured, do nothing */
1222         if (!mvm->bcast_filters)
1223                 return false;
1224
1225         /* configure and attach these filters for each associated sta vif */
1226         ieee80211_iterate_active_interfaces(
1227                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1228                 iwl_mvm_bcast_filter_iterator, &iter_data);
1229
1230         return true;
1231 }
1232 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1233                                           struct ieee80211_vif *vif)
1234 {
1235         struct iwl_bcast_filter_cmd cmd;
1236
1237         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1238                 return 0;
1239
1240         /* bcast filtering isn't supported for P2P client */
1241         if (vif->p2p)
1242                 return 0;
1243
1244         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1245                 return 0;
1246
1247         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1248                                     sizeof(cmd), &cmd);
1249 }
1250 #else
1251 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1252                                                  struct ieee80211_vif *vif)
1253 {
1254         return 0;
1255 }
1256 #endif
1257
1258 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1259                                              struct ieee80211_vif *vif,
1260                                              struct ieee80211_bss_conf *bss_conf,
1261                                              u32 changes)
1262 {
1263         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1264         int ret;
1265
1266         /*
1267          * Re-calculate the tsf id, as the master-slave relations depend on the
1268          * beacon interval, which was not known when the station interface was
1269          * added.
1270          */
1271         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1272                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1273
1274         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1275         if (ret)
1276                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1277
1278         if (changes & BSS_CHANGED_ASSOC) {
1279                 if (bss_conf->assoc) {
1280                         /* add quota for this interface */
1281                         ret = iwl_mvm_update_quotas(mvm, vif);
1282                         if (ret) {
1283                                 IWL_ERR(mvm, "failed to update quotas\n");
1284                                 return;
1285                         }
1286
1287                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1288                                      &mvm->status)) {
1289                                 /*
1290                                  * If we're restarting then the firmware will
1291                                  * obviously have lost synchronisation with
1292                                  * the AP. It will attempt to synchronise by
1293                                  * itself, but we can make it more reliable by
1294                                  * scheduling a session protection time event.
1295                                  *
1296                                  * The firmware needs to receive a beacon to
1297                                  * catch up with synchronisation, use 110% of
1298                                  * the beacon interval.
1299                                  *
1300                                  * Set a large maximum delay to allow for more
1301                                  * than a single interface.
1302                                  */
1303                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1304                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1305                                                         5 * dur);
1306                         }
1307
1308                         iwl_mvm_sf_update(mvm, vif, false);
1309                         iwl_mvm_power_vif_assoc(mvm, vif);
1310                         if (vif->p2p)
1311                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1312                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1313                         /*
1314                          * If update fails - SF might be running in associated
1315                          * mode while disassociated - which is forbidden.
1316                          */
1317                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1318                                   "Failed to update SF upon disassociation\n");
1319
1320                         /* remove AP station now that the MAC is unassoc */
1321                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1322                         if (ret)
1323                                 IWL_ERR(mvm, "failed to remove AP station\n");
1324
1325                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1326                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1327                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1328                         /* remove quota for this interface */
1329                         ret = iwl_mvm_update_quotas(mvm, NULL);
1330                         if (ret)
1331                                 IWL_ERR(mvm, "failed to update quotas\n");
1332
1333                         if (vif->p2p)
1334                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1335                 }
1336
1337                 iwl_mvm_recalc_multicast(mvm);
1338                 iwl_mvm_configure_bcast_filter(mvm, vif);
1339
1340                 /* reset rssi values */
1341                 mvmvif->bf_data.ave_beacon_signal = 0;
1342
1343                 iwl_mvm_bt_coex_vif_change(mvm);
1344                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1345                                     IEEE80211_SMPS_AUTOMATIC);
1346         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1347                 /*
1348                  * We received a beacon _after_ association so
1349                  * remove the session protection.
1350                  */
1351                 iwl_mvm_remove_time_event(mvm, mvmvif,
1352                                           &mvmvif->time_event_data);
1353                 iwl_mvm_sf_update(mvm, vif, false);
1354                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1355         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1356                               BSS_CHANGED_QOS)) {
1357                 ret = iwl_mvm_power_update_mac(mvm);
1358                 if (ret)
1359                         IWL_ERR(mvm, "failed to update power mode\n");
1360         }
1361         if (changes & BSS_CHANGED_TXPOWER) {
1362                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1363                                 bss_conf->txpower);
1364                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1365         }
1366
1367         if (changes & BSS_CHANGED_CQM) {
1368                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1369                 /* reset cqm events tracking */
1370                 mvmvif->bf_data.last_cqm_event = 0;
1371                 if (mvmvif->bf_data.bf_enabled) {
1372                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1373                         if (ret)
1374                                 IWL_ERR(mvm,
1375                                         "failed to update CQM thresholds\n");
1376                 }
1377         }
1378
1379         if (changes & BSS_CHANGED_ARP_FILTER) {
1380                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1381                 iwl_mvm_configure_bcast_filter(mvm, vif);
1382         }
1383 }
1384
1385 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1386                                  struct ieee80211_vif *vif)
1387 {
1388         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1389         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1390         int ret;
1391
1392         mutex_lock(&mvm->mutex);
1393
1394         /* Send the beacon template */
1395         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1396         if (ret)
1397                 goto out_unlock;
1398
1399         /*
1400          * Re-calculate the tsf id, as the master-slave relations depend on the
1401          * beacon interval, which was not known when the AP interface was added.
1402          */
1403         if (vif->type == NL80211_IFTYPE_AP)
1404                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1405
1406         /* Add the mac context */
1407         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1408         if (ret)
1409                 goto out_unlock;
1410
1411         /* Perform the binding */
1412         ret = iwl_mvm_binding_add_vif(mvm, vif);
1413         if (ret)
1414                 goto out_remove;
1415
1416         /* Send the bcast station. At this stage the TBTT and DTIM time events
1417          * are added and applied to the scheduler */
1418         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1419         if (ret)
1420                 goto out_unbind;
1421
1422         /* must be set before quota calculations */
1423         mvmvif->ap_ibss_active = true;
1424
1425         /* power updated needs to be done before quotas */
1426         iwl_mvm_power_update_mac(mvm);
1427
1428         ret = iwl_mvm_update_quotas(mvm, vif);
1429         if (ret)
1430                 goto out_quota_failed;
1431
1432         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1433         if (vif->p2p && mvm->p2p_device_vif)
1434                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1435
1436         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1437
1438         iwl_mvm_bt_coex_vif_change(mvm);
1439
1440         mutex_unlock(&mvm->mutex);
1441         return 0;
1442
1443 out_quota_failed:
1444         iwl_mvm_power_update_mac(mvm);
1445         mvmvif->ap_ibss_active = false;
1446         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1447 out_unbind:
1448         iwl_mvm_binding_remove_vif(mvm, vif);
1449 out_remove:
1450         iwl_mvm_mac_ctxt_remove(mvm, vif);
1451 out_unlock:
1452         mutex_unlock(&mvm->mutex);
1453         return ret;
1454 }
1455
1456 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1457                                  struct ieee80211_vif *vif)
1458 {
1459         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1460         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1461
1462         iwl_mvm_prepare_mac_removal(mvm, vif);
1463
1464         mutex_lock(&mvm->mutex);
1465
1466         mvmvif->ap_ibss_active = false;
1467
1468         iwl_mvm_bt_coex_vif_change(mvm);
1469
1470         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1471
1472         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1473         if (vif->p2p && mvm->p2p_device_vif)
1474                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1475
1476         iwl_mvm_update_quotas(mvm, NULL);
1477         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1478         iwl_mvm_binding_remove_vif(mvm, vif);
1479
1480         iwl_mvm_power_update_mac(mvm);
1481
1482         iwl_mvm_mac_ctxt_remove(mvm, vif);
1483
1484         mutex_unlock(&mvm->mutex);
1485 }
1486
1487 static void
1488 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1489                                  struct ieee80211_vif *vif,
1490                                  struct ieee80211_bss_conf *bss_conf,
1491                                  u32 changes)
1492 {
1493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1494
1495         /* Changes will be applied when the AP/IBSS is started */
1496         if (!mvmvif->ap_ibss_active)
1497                 return;
1498
1499         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1500                        BSS_CHANGED_BANDWIDTH) &&
1501             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1502                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1503
1504         /* Need to send a new beacon template to the FW */
1505         if (changes & BSS_CHANGED_BEACON &&
1506             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1507                 IWL_WARN(mvm, "Failed updating beacon data\n");
1508 }
1509
1510 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1511                                      struct ieee80211_vif *vif,
1512                                      struct ieee80211_bss_conf *bss_conf,
1513                                      u32 changes)
1514 {
1515         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1516
1517         mutex_lock(&mvm->mutex);
1518
1519         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1520                 iwl_mvm_sched_scan_stop(mvm, true);
1521
1522         switch (vif->type) {
1523         case NL80211_IFTYPE_STATION:
1524                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1525                 break;
1526         case NL80211_IFTYPE_AP:
1527         case NL80211_IFTYPE_ADHOC:
1528                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1529                 break;
1530         default:
1531                 /* shouldn't happen */
1532                 WARN_ON_ONCE(1);
1533         }
1534
1535         mutex_unlock(&mvm->mutex);
1536 }
1537
1538 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1539                                struct ieee80211_vif *vif,
1540                                struct ieee80211_scan_request *hw_req)
1541 {
1542         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1543         struct cfg80211_scan_request *req = &hw_req->req;
1544         int ret;
1545
1546         if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
1547                 return -EINVAL;
1548
1549         mutex_lock(&mvm->mutex);
1550
1551         switch (mvm->scan_status) {
1552         case IWL_MVM_SCAN_SCHED:
1553                 ret = iwl_mvm_sched_scan_stop(mvm, true);
1554                 if (ret) {
1555                         ret = -EBUSY;
1556                         goto out;
1557                 }
1558                 break;
1559         case IWL_MVM_SCAN_NONE:
1560                 break;
1561         default:
1562                 ret = -EBUSY;
1563                 goto out;
1564         }
1565
1566         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1567
1568         ret = iwl_mvm_scan_request(mvm, vif, req);
1569         if (ret)
1570                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1571 out:
1572         mutex_unlock(&mvm->mutex);
1573         /* make sure to flush the Rx handler before the next scan arrives */
1574         iwl_mvm_wait_for_async_handlers(mvm);
1575         return ret;
1576 }
1577
1578 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1579                                        struct ieee80211_vif *vif)
1580 {
1581         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1582
1583         mutex_lock(&mvm->mutex);
1584
1585         iwl_mvm_cancel_scan(mvm);
1586
1587         mutex_unlock(&mvm->mutex);
1588 }
1589
1590 static void
1591 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1592                                   struct ieee80211_sta *sta, u16 tids,
1593                                   int num_frames,
1594                                   enum ieee80211_frame_release_type reason,
1595                                   bool more_data)
1596 {
1597         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1598
1599         /* Called when we need to transmit (a) frame(s) from mac80211 */
1600
1601         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1602                                           tids, more_data, false);
1603 }
1604
1605 static void
1606 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1607                                     struct ieee80211_sta *sta, u16 tids,
1608                                     int num_frames,
1609                                     enum ieee80211_frame_release_type reason,
1610                                     bool more_data)
1611 {
1612         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1613
1614         /* Called when we need to transmit (a) frame(s) from agg queue */
1615
1616         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1617                                           tids, more_data, true);
1618 }
1619
1620 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1621                                    struct ieee80211_vif *vif,
1622                                    enum sta_notify_cmd cmd,
1623                                    struct ieee80211_sta *sta)
1624 {
1625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1626         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1627         int tid;
1628
1629         switch (cmd) {
1630         case STA_NOTIFY_SLEEP:
1631                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1632                         ieee80211_sta_block_awake(hw, sta, true);
1633                 spin_lock_bh(&mvmsta->lock);
1634                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1635                         struct iwl_mvm_tid_data *tid_data;
1636
1637                         tid_data = &mvmsta->tid_data[tid];
1638                         if (tid_data->state != IWL_AGG_ON &&
1639                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1640                                 continue;
1641                         if (iwl_mvm_tid_queued(tid_data) == 0)
1642                                 continue;
1643                         ieee80211_sta_set_buffered(sta, tid, true);
1644                 }
1645                 spin_unlock_bh(&mvmsta->lock);
1646                 /*
1647                  * The fw updates the STA to be asleep. Tx packets on the Tx
1648                  * queues to this station will not be transmitted. The fw will
1649                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1650                  */
1651                 break;
1652         case STA_NOTIFY_AWAKE:
1653                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1654                         break;
1655                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1656                 break;
1657         default:
1658                 break;
1659         }
1660 }
1661
1662 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1663                                        struct ieee80211_vif *vif,
1664                                        struct ieee80211_sta *sta)
1665 {
1666         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1667         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1668
1669         /*
1670          * This is called before mac80211 does RCU synchronisation,
1671          * so here we already invalidate our internal RCU-protected
1672          * station pointer. The rest of the code will thus no longer
1673          * be able to find the station this way, and we don't rely
1674          * on further RCU synchronisation after the sta_state()
1675          * callback deleted the station.
1676          */
1677         mutex_lock(&mvm->mutex);
1678         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1679                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1680                                    ERR_PTR(-ENOENT));
1681         mutex_unlock(&mvm->mutex);
1682 }
1683
1684 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1685                                  struct ieee80211_vif *vif,
1686                                  struct ieee80211_sta *sta,
1687                                  enum ieee80211_sta_state old_state,
1688                                  enum ieee80211_sta_state new_state)
1689 {
1690         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1691         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1692         int ret;
1693
1694         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1695                            sta->addr, old_state, new_state);
1696
1697         /* this would be a mac80211 bug ... but don't crash */
1698         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1699                 return -EINVAL;
1700
1701         /* if a STA is being removed, reuse its ID */
1702         flush_work(&mvm->sta_drained_wk);
1703
1704         mutex_lock(&mvm->mutex);
1705         if (old_state == IEEE80211_STA_NOTEXIST &&
1706             new_state == IEEE80211_STA_NONE) {
1707                 /*
1708                  * Firmware bug - it'll crash if the beacon interval is less
1709                  * than 16. We can't avoid connecting at all, so refuse the
1710                  * station state change, this will cause mac80211 to abandon
1711                  * attempts to connect to this AP, and eventually wpa_s will
1712                  * blacklist the AP...
1713                  */
1714                 if (vif->type == NL80211_IFTYPE_STATION &&
1715                     vif->bss_conf.beacon_int < 16) {
1716                         IWL_ERR(mvm,
1717                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1718                                 sta->addr, vif->bss_conf.beacon_int);
1719                         ret = -EINVAL;
1720                         goto out_unlock;
1721                 }
1722                 ret = iwl_mvm_add_sta(mvm, vif, sta);
1723         } else if (old_state == IEEE80211_STA_NONE &&
1724                    new_state == IEEE80211_STA_AUTH) {
1725                 /*
1726                  * EBS may be disabled due to previous failures reported by FW.
1727                  * Reset EBS status here assuming environment has been changed.
1728                  */
1729                 mvm->last_ebs_successful = true;
1730                 ret = 0;
1731         } else if (old_state == IEEE80211_STA_AUTH &&
1732                    new_state == IEEE80211_STA_ASSOC) {
1733                 ret = iwl_mvm_update_sta(mvm, vif, sta);
1734                 if (ret == 0)
1735                         iwl_mvm_rs_rate_init(mvm, sta,
1736                                              mvmvif->phy_ctxt->channel->band,
1737                                              true);
1738         } else if (old_state == IEEE80211_STA_ASSOC &&
1739                    new_state == IEEE80211_STA_AUTHORIZED) {
1740                 /* enable beacon filtering */
1741                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1742                 ret = 0;
1743         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1744                    new_state == IEEE80211_STA_ASSOC) {
1745                 /* disable beacon filtering */
1746                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
1747                 ret = 0;
1748         } else if (old_state == IEEE80211_STA_ASSOC &&
1749                    new_state == IEEE80211_STA_AUTH) {
1750                 ret = 0;
1751         } else if (old_state == IEEE80211_STA_AUTH &&
1752                    new_state == IEEE80211_STA_NONE) {
1753                 ret = 0;
1754         } else if (old_state == IEEE80211_STA_NONE &&
1755                    new_state == IEEE80211_STA_NOTEXIST) {
1756                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1757         } else {
1758                 ret = -EIO;
1759         }
1760  out_unlock:
1761         mutex_unlock(&mvm->mutex);
1762
1763         return ret;
1764 }
1765
1766 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1767 {
1768         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1769
1770         mvm->rts_threshold = value;
1771
1772         return 0;
1773 }
1774
1775 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1776                                   struct ieee80211_vif *vif,
1777                                   struct ieee80211_sta *sta, u32 changed)
1778 {
1779         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1780
1781         if (vif->type == NL80211_IFTYPE_STATION &&
1782             changed & IEEE80211_RC_NSS_CHANGED)
1783                 iwl_mvm_sf_update(mvm, vif, false);
1784 }
1785
1786 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1787                                struct ieee80211_vif *vif, u16 ac,
1788                                const struct ieee80211_tx_queue_params *params)
1789 {
1790         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1791         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1792
1793         mvmvif->queue_params[ac] = *params;
1794
1795         /*
1796          * No need to update right away, we'll get BSS_CHANGED_QOS
1797          * The exception is P2P_DEVICE interface which needs immediate update.
1798          */
1799         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1800                 int ret;
1801
1802                 mutex_lock(&mvm->mutex);
1803                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1804                 mutex_unlock(&mvm->mutex);
1805                 return ret;
1806         }
1807         return 0;
1808 }
1809
1810 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1811                                       struct ieee80211_vif *vif)
1812 {
1813         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1814         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1815                            200 + vif->bss_conf.beacon_int);
1816         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1817                                100 + vif->bss_conf.beacon_int);
1818
1819         if (WARN_ON_ONCE(vif->bss_conf.assoc))
1820                 return;
1821
1822         mutex_lock(&mvm->mutex);
1823         /* Try really hard to protect the session and hear a beacon */
1824         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1825         mutex_unlock(&mvm->mutex);
1826 }
1827
1828 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1829                                         struct ieee80211_vif *vif,
1830                                         struct cfg80211_sched_scan_request *req,
1831                                         struct ieee80211_sched_scan_ies *ies)
1832 {
1833         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1834         int ret;
1835
1836         mutex_lock(&mvm->mutex);
1837
1838         if (!iwl_mvm_is_idle(mvm)) {
1839                 ret = -EBUSY;
1840                 goto out;
1841         }
1842
1843         switch (mvm->scan_status) {
1844         case IWL_MVM_SCAN_OS:
1845                 IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n");
1846                 ret = iwl_mvm_cancel_scan(mvm);
1847                 if (ret) {
1848                         ret = -EBUSY;
1849                         goto out;
1850                 }
1851
1852                 /*
1853                  * iwl_mvm_rx_scan_complete() will be called soon but will
1854                  * not reset the scan status as it won't be IWL_MVM_SCAN_OS
1855                  * any more since we queue the next scan immediately (below).
1856                  * We make sure it is called before the next scan starts by
1857                  * flushing the async-handlers work.
1858                  */
1859                 break;
1860         case IWL_MVM_SCAN_NONE:
1861                 break;
1862         default:
1863                 ret = -EBUSY;
1864                 goto out;
1865         }
1866
1867         mvm->scan_status = IWL_MVM_SCAN_SCHED;
1868
1869         ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1870         if (ret)
1871                 goto err;
1872
1873         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1874         if (ret)
1875                 goto err;
1876
1877         ret = iwl_mvm_sched_scan_start(mvm, req);
1878         if (!ret)
1879                 goto out;
1880 err:
1881         mvm->scan_status = IWL_MVM_SCAN_NONE;
1882 out:
1883         mutex_unlock(&mvm->mutex);
1884         /* make sure to flush the Rx handler before the next scan arrives */
1885         iwl_mvm_wait_for_async_handlers(mvm);
1886         return ret;
1887 }
1888
1889 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
1890                                        struct ieee80211_vif *vif)
1891 {
1892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1893         int ret;
1894
1895         mutex_lock(&mvm->mutex);
1896         ret = iwl_mvm_sched_scan_stop(mvm, false);
1897         mutex_unlock(&mvm->mutex);
1898         iwl_mvm_wait_for_async_handlers(mvm);
1899
1900         return ret;
1901 }
1902
1903 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
1904                                enum set_key_cmd cmd,
1905                                struct ieee80211_vif *vif,
1906                                struct ieee80211_sta *sta,
1907                                struct ieee80211_key_conf *key)
1908 {
1909         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1910         int ret;
1911
1912         if (iwlwifi_mod_params.sw_crypto) {
1913                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
1914                 return -EOPNOTSUPP;
1915         }
1916
1917         switch (key->cipher) {
1918         case WLAN_CIPHER_SUITE_TKIP:
1919                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1920                 /* fall-through */
1921         case WLAN_CIPHER_SUITE_CCMP:
1922                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1923                 break;
1924         case WLAN_CIPHER_SUITE_AES_CMAC:
1925                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
1926                 break;
1927         case WLAN_CIPHER_SUITE_WEP40:
1928         case WLAN_CIPHER_SUITE_WEP104:
1929                 /*
1930                  * Support for TX only, at least for now, so accept
1931                  * the key and do nothing else. Then mac80211 will
1932                  * pass it for TX but we don't have to use it for RX.
1933                  */
1934                 return 0;
1935         default:
1936                 /* currently FW supports only one optional cipher scheme */
1937                 if (hw->n_cipher_schemes &&
1938                     hw->cipher_schemes->cipher == key->cipher)
1939                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
1940                 else
1941                         return -EOPNOTSUPP;
1942         }
1943
1944         mutex_lock(&mvm->mutex);
1945
1946         switch (cmd) {
1947         case SET_KEY:
1948                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1949                      vif->type == NL80211_IFTYPE_AP) && !sta) {
1950                         /*
1951                          * GTK on AP interface is a TX-only key, return 0;
1952                          * on IBSS they're per-station and because we're lazy
1953                          * we don't support them for RX, so do the same.
1954                          */
1955                         ret = 0;
1956                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1957                         break;
1958                 }
1959
1960                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
1961                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
1962                 if (ret) {
1963                         IWL_WARN(mvm, "set key failed\n");
1964                         /*
1965                          * can't add key for RX, but we don't need it
1966                          * in the device for TX so still return 0
1967                          */
1968                         key->hw_key_idx = STA_KEY_IDX_INVALID;
1969                         ret = 0;
1970                 }
1971
1972                 break;
1973         case DISABLE_KEY:
1974                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
1975                         ret = 0;
1976                         break;
1977                 }
1978
1979                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
1980                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
1981                 break;
1982         default:
1983                 ret = -EINVAL;
1984         }
1985
1986         mutex_unlock(&mvm->mutex);
1987         return ret;
1988 }
1989
1990 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
1991                                         struct ieee80211_vif *vif,
1992                                         struct ieee80211_key_conf *keyconf,
1993                                         struct ieee80211_sta *sta,
1994                                         u32 iv32, u16 *phase1key)
1995 {
1996         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1997
1998         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1999                 return;
2000
2001         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2002 }
2003
2004
2005 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2006                        struct ieee80211_vif *vif,
2007                        struct ieee80211_channel *channel,
2008                        int duration,
2009                        enum ieee80211_roc_type type)
2010 {
2011         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2012         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2013         struct cfg80211_chan_def chandef;
2014         struct iwl_mvm_phy_ctxt *phy_ctxt;
2015         int ret, i;
2016
2017         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2018                            duration, type);
2019
2020         if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
2021                 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
2022                 return -EINVAL;
2023         }
2024
2025         mutex_lock(&mvm->mutex);
2026
2027         for (i = 0; i < NUM_PHY_CTX; i++) {
2028                 phy_ctxt = &mvm->phy_ctxts[i];
2029                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2030                         continue;
2031
2032                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2033                         /*
2034                          * Unbind the P2P_DEVICE from the current PHY context,
2035                          * and if the PHY context is not used remove it.
2036                          */
2037                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2038                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2039                                 goto out_unlock;
2040
2041                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2042
2043                         /* Bind the P2P_DEVICE to the current PHY Context */
2044                         mvmvif->phy_ctxt = phy_ctxt;
2045
2046                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2047                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2048                                 goto out_unlock;
2049
2050                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2051                         goto schedule_time_event;
2052                 }
2053         }
2054
2055         /* Need to update the PHY context only if the ROC channel changed */
2056         if (channel == mvmvif->phy_ctxt->channel)
2057                 goto schedule_time_event;
2058
2059         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2060
2061         /*
2062          * Change the PHY context configuration as it is currently referenced
2063          * only by the P2P Device MAC
2064          */
2065         if (mvmvif->phy_ctxt->ref == 1) {
2066                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2067                                                &chandef, 1, 1);
2068                 if (ret)
2069                         goto out_unlock;
2070         } else {
2071                 /*
2072                  * The PHY context is shared with other MACs. Need to remove the
2073                  * P2P Device from the binding, allocate an new PHY context and
2074                  * create a new binding
2075                  */
2076                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2077                 if (!phy_ctxt) {
2078                         ret = -ENOSPC;
2079                         goto out_unlock;
2080                 }
2081
2082                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2083                                                1, 1);
2084                 if (ret) {
2085                         IWL_ERR(mvm, "Failed to change PHY context\n");
2086                         goto out_unlock;
2087                 }
2088
2089                 /* Unbind the P2P_DEVICE from the current PHY context */
2090                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2091                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2092                         goto out_unlock;
2093
2094                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2095
2096                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2097                 mvmvif->phy_ctxt = phy_ctxt;
2098
2099                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2100                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2101                         goto out_unlock;
2102
2103                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2104         }
2105
2106 schedule_time_event:
2107         /* Schedule the time events */
2108         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2109
2110 out_unlock:
2111         mutex_unlock(&mvm->mutex);
2112         IWL_DEBUG_MAC80211(mvm, "leave\n");
2113         return ret;
2114 }
2115
2116 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2117 {
2118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2119
2120         IWL_DEBUG_MAC80211(mvm, "enter\n");
2121
2122         mutex_lock(&mvm->mutex);
2123         iwl_mvm_stop_p2p_roc(mvm);
2124         mutex_unlock(&mvm->mutex);
2125
2126         IWL_DEBUG_MAC80211(mvm, "leave\n");
2127         return 0;
2128 }
2129
2130 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2131                                struct ieee80211_chanctx_conf *ctx)
2132 {
2133         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2134         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2135         struct iwl_mvm_phy_ctxt *phy_ctxt;
2136         int ret;
2137
2138         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2139
2140         mutex_lock(&mvm->mutex);
2141         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2142         if (!phy_ctxt) {
2143                 ret = -ENOSPC;
2144                 goto out;
2145         }
2146
2147         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2148                                        ctx->rx_chains_static,
2149                                        ctx->rx_chains_dynamic);
2150         if (ret) {
2151                 IWL_ERR(mvm, "Failed to add PHY context\n");
2152                 goto out;
2153         }
2154
2155         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2156         *phy_ctxt_id = phy_ctxt->id;
2157 out:
2158         mutex_unlock(&mvm->mutex);
2159         return ret;
2160 }
2161
2162 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2163                                    struct ieee80211_chanctx_conf *ctx)
2164 {
2165         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2166         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2167         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2168
2169         mutex_lock(&mvm->mutex);
2170         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2171         mutex_unlock(&mvm->mutex);
2172 }
2173
2174 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2175                                    struct ieee80211_chanctx_conf *ctx,
2176                                    u32 changed)
2177 {
2178         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2179         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2180         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2181
2182         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2183                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2184                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2185                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2186                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2187                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2188                       phy_ctxt->ref, changed))
2189                 return;
2190
2191         mutex_lock(&mvm->mutex);
2192         iwl_mvm_bt_coex_vif_change(mvm);
2193         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2194                                  ctx->rx_chains_static,
2195                                  ctx->rx_chains_dynamic);
2196         mutex_unlock(&mvm->mutex);
2197 }
2198
2199 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2200                                       struct ieee80211_vif *vif,
2201                                       struct ieee80211_chanctx_conf *ctx)
2202 {
2203         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2204         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2205         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2206         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2207         int ret;
2208
2209         mutex_lock(&mvm->mutex);
2210
2211         mvmvif->phy_ctxt = phy_ctxt;
2212
2213         switch (vif->type) {
2214         case NL80211_IFTYPE_AP:
2215                 /* Unless it's a CSA flow we have nothing to do here */
2216                 if (vif->csa_active) {
2217                         mvmvif->ap_ibss_active = true;
2218                         break;
2219                 }
2220         case NL80211_IFTYPE_ADHOC:
2221                 /*
2222                  * The AP binding flow is handled as part of the start_ap flow
2223                  * (in bss_info_changed), similarly for IBSS.
2224                  */
2225                 ret = 0;
2226                 goto out_unlock;
2227         case NL80211_IFTYPE_STATION:
2228         case NL80211_IFTYPE_MONITOR:
2229                 break;
2230         default:
2231                 ret = -EINVAL;
2232                 goto out_unlock;
2233         }
2234
2235         ret = iwl_mvm_binding_add_vif(mvm, vif);
2236         if (ret)
2237                 goto out_unlock;
2238
2239         /*
2240          * Power state must be updated before quotas,
2241          * otherwise fw will complain.
2242          */
2243         iwl_mvm_power_update_mac(mvm);
2244
2245         /* Setting the quota at this stage is only required for monitor
2246          * interfaces. For the other types, the bss_info changed flow
2247          * will handle quota settings.
2248          */
2249         if (vif->type == NL80211_IFTYPE_MONITOR) {
2250                 mvmvif->monitor_active = true;
2251                 ret = iwl_mvm_update_quotas(mvm, vif);
2252                 if (ret)
2253                         goto out_remove_binding;
2254         }
2255
2256         /* Handle binding during CSA */
2257         if (vif->type == NL80211_IFTYPE_AP) {
2258                 iwl_mvm_update_quotas(mvm, vif);
2259                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2260         }
2261
2262         goto out_unlock;
2263
2264  out_remove_binding:
2265         iwl_mvm_binding_remove_vif(mvm, vif);
2266         iwl_mvm_power_update_mac(mvm);
2267  out_unlock:
2268         mutex_unlock(&mvm->mutex);
2269         if (ret)
2270                 mvmvif->phy_ctxt = NULL;
2271         return ret;
2272 }
2273
2274 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2275                                          struct ieee80211_vif *vif,
2276                                          struct ieee80211_chanctx_conf *ctx)
2277 {
2278         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2279         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2280
2281         mutex_lock(&mvm->mutex);
2282
2283         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2284
2285         switch (vif->type) {
2286         case NL80211_IFTYPE_ADHOC:
2287                 goto out_unlock;
2288         case NL80211_IFTYPE_MONITOR:
2289                 mvmvif->monitor_active = false;
2290                 iwl_mvm_update_quotas(mvm, NULL);
2291                 break;
2292         case NL80211_IFTYPE_AP:
2293                 /* This part is triggered only during CSA */
2294                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2295                         goto out_unlock;
2296
2297                 mvmvif->ap_ibss_active = false;
2298                 iwl_mvm_update_quotas(mvm, NULL);
2299                 /*TODO: bt_coex notification here? */
2300         default:
2301                 break;
2302         }
2303
2304         iwl_mvm_binding_remove_vif(mvm, vif);
2305
2306 out_unlock:
2307         mvmvif->phy_ctxt = NULL;
2308         iwl_mvm_power_update_mac(mvm);
2309         mutex_unlock(&mvm->mutex);
2310 }
2311
2312 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2313                            struct ieee80211_sta *sta,
2314                            bool set)
2315 {
2316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2317         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2318
2319         if (!mvm_sta || !mvm_sta->vif) {
2320                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2321                 return -EINVAL;
2322         }
2323
2324         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2325 }
2326
2327 #ifdef CONFIG_NL80211_TESTMODE
2328 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2329         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2330         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2331         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2332 };
2333
2334 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2335                                       struct ieee80211_vif *vif,
2336                                       void *data, int len)
2337 {
2338         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2339         int err;
2340         u32 noa_duration;
2341
2342         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2343         if (err)
2344                 return err;
2345
2346         if (!tb[IWL_MVM_TM_ATTR_CMD])
2347                 return -EINVAL;
2348
2349         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2350         case IWL_MVM_TM_CMD_SET_NOA:
2351                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2352                     !vif->bss_conf.enable_beacon ||
2353                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2354                         return -EINVAL;
2355
2356                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2357                 if (noa_duration >= vif->bss_conf.beacon_int)
2358                         return -EINVAL;
2359
2360                 mvm->noa_duration = noa_duration;
2361                 mvm->noa_vif = vif;
2362
2363                 return iwl_mvm_update_quotas(mvm, NULL);
2364         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2365                 /* must be associated client vif - ignore authorized */
2366                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2367                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2368                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2369                         return -EINVAL;
2370
2371                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2372                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2373                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2374         }
2375
2376         return -EOPNOTSUPP;
2377 }
2378
2379 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2380                                     struct ieee80211_vif *vif,
2381                                     void *data, int len)
2382 {
2383         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2384         int err;
2385
2386         mutex_lock(&mvm->mutex);
2387         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2388         mutex_unlock(&mvm->mutex);
2389
2390         return err;
2391 }
2392 #endif
2393
2394 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2395                                           struct ieee80211_vif *vif,
2396                                           struct cfg80211_chan_def *chandef)
2397 {
2398         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2399
2400         mutex_lock(&mvm->mutex);
2401         if (WARN(mvm->csa_vif && mvm->csa_vif->csa_active,
2402                  "Another CSA is already in progress"))
2403                 goto out_unlock;
2404
2405         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2406                            chandef->center_freq1);
2407         mvm->csa_vif = vif;
2408
2409 out_unlock:
2410         mutex_unlock(&mvm->mutex);
2411 }
2412
2413 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2414                               struct ieee80211_vif *vif, u32 queues, bool drop)
2415 {
2416         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2417         struct iwl_mvm_vif *mvmvif;
2418         struct iwl_mvm_sta *mvmsta;
2419
2420         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2421                 return;
2422
2423         mutex_lock(&mvm->mutex);
2424         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2425         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2426
2427         if (WARN_ON_ONCE(!mvmsta))
2428                 goto done;
2429
2430         if (drop) {
2431                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2432                         IWL_ERR(mvm, "flush request fail\n");
2433         } else {
2434                 iwl_trans_wait_tx_queue_empty(mvm->trans,
2435                                               mvmsta->tfd_queue_msk);
2436         }
2437 done:
2438         mutex_unlock(&mvm->mutex);
2439 }
2440
2441 const struct ieee80211_ops iwl_mvm_hw_ops = {
2442         .tx = iwl_mvm_mac_tx,
2443         .ampdu_action = iwl_mvm_mac_ampdu_action,
2444         .start = iwl_mvm_mac_start,
2445         .restart_complete = iwl_mvm_mac_restart_complete,
2446         .stop = iwl_mvm_mac_stop,
2447         .add_interface = iwl_mvm_mac_add_interface,
2448         .remove_interface = iwl_mvm_mac_remove_interface,
2449         .config = iwl_mvm_mac_config,
2450         .prepare_multicast = iwl_mvm_prepare_multicast,
2451         .configure_filter = iwl_mvm_configure_filter,
2452         .bss_info_changed = iwl_mvm_bss_info_changed,
2453         .hw_scan = iwl_mvm_mac_hw_scan,
2454         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
2455         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
2456         .sta_state = iwl_mvm_mac_sta_state,
2457         .sta_notify = iwl_mvm_mac_sta_notify,
2458         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
2459         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
2460         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
2461         .sta_rc_update = iwl_mvm_sta_rc_update,
2462         .conf_tx = iwl_mvm_mac_conf_tx,
2463         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
2464         .flush = iwl_mvm_mac_flush,
2465         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
2466         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
2467         .set_key = iwl_mvm_mac_set_key,
2468         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
2469         .remain_on_channel = iwl_mvm_roc,
2470         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
2471         .add_chanctx = iwl_mvm_add_chanctx,
2472         .remove_chanctx = iwl_mvm_remove_chanctx,
2473         .change_chanctx = iwl_mvm_change_chanctx,
2474         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
2475         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
2476
2477         .start_ap = iwl_mvm_start_ap_ibss,
2478         .stop_ap = iwl_mvm_stop_ap_ibss,
2479         .join_ibss = iwl_mvm_start_ap_ibss,
2480         .leave_ibss = iwl_mvm_stop_ap_ibss,
2481
2482         .set_tim = iwl_mvm_set_tim,
2483
2484         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
2485
2486         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
2487
2488 #ifdef CONFIG_PM_SLEEP
2489         /* look at d3.c */
2490         .suspend = iwl_mvm_suspend,
2491         .resume = iwl_mvm_resume,
2492         .set_wakeup = iwl_mvm_set_wakeup,
2493         .set_rekey_data = iwl_mvm_set_rekey_data,
2494 #if IS_ENABLED(CONFIG_IPV6)
2495         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
2496 #endif
2497         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
2498 #endif
2499 };