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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  *
  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
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/kernel.h>
  64 #include <linux/slab.h>
  65 #include <linux/skbuff.h>
  66 #include <linux/netdevice.h>
  67 #include <linux/etherdevice.h>
  68 #include <linux/ip.h>
  69 #include <linux/if_arp.h>
  70 #include <net/mac80211.h>
  71 #include <net/ieee80211_radiotap.h>
  72 #include <net/tcp.h>
  73
  74 #include "iwl-op-mode.h"
  75 #include "iwl-io.h"
  76 #include "mvm.h"
  77 #include "sta.h"
  78 #include "time-event.h"
  79 #include "iwl-eeprom-parse.h"
  80 #include "fw-api-scan.h"
  81 #include "iwl-phy-db.h"
  82 #include "testmode.h"
  83 #include "iwl-fw-error-dump.h"
  84 #include "iwl-prph.h"
  85
  86 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_STATION),
  90         },
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_AP) |
  94                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  95                         BIT(NL80211_IFTYPE_P2P_GO),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 104         {
 105                 .num_different_channels = 1,
 106                 .max_interfaces = 3,
 107                 .limits = iwl_mvm_limits,
 108                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 109         },
 110 };
 111
 112 #ifdef CONFIG_PM_SLEEP
 113 static const struct nl80211_wowlan_tcp_data_token_feature
 114 iwl_mvm_wowlan_tcp_token_feature = {
 115         .min_len = 0,
 116         .max_len = 255,
 117         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 118 };
 119
 120 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 121         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 122         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .data_interval_max = 65535, /* __le16 in API */
 127         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .seq = true,
 132 };
 133 #endif
 134
 135 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 136 /*
 137  * Use the reserved field to indicate magic values.
 138  * these values will only be used internally by the driver,
 139  * and won't make it to the fw (reserved will be 0).
 140  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 141  *      be the vif's ip address. in case there is not a single
 142  *      ip address (0, or more than 1), this attribute will
 143  *      be skipped.
 144  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 145  *      the LSB bytes of the vif's mac address
 146  */
 147 enum {
 148         BC_FILTER_MAGIC_NONE = 0,
 149         BC_FILTER_MAGIC_IP,
 150         BC_FILTER_MAGIC_MAC,
 151 };
 152
 153 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 154         {
 155                 /* arp */
 156                 .discard = 0,
 157                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 158                 .attrs = {
 159                         {
 160                                 /* frame type - arp, hw type - ethernet */
 161                                 .offset_type =
 162                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 163                                 .offset = sizeof(rfc1042_header),
 164                                 .val = cpu_to_be32(0x08060001),
 165                                 .mask = cpu_to_be32(0xffffffff),
 166                         },
 167                         {
 168                                 /* arp dest ip */
 169                                 .offset_type =
 170                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 171                                 .offset = sizeof(rfc1042_header) + 2 +
 172                                           sizeof(struct arphdr) +
 173                                           ETH_ALEN + sizeof(__be32) +
 174                                           ETH_ALEN,
 175                                 .mask = cpu_to_be32(0xffffffff),
 176                                 /* mark it as special field */
 177                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 178                         },
 179                 },
 180         },
 181         {
 182                 /* dhcp offer bcast */
 183                 .discard = 0,
 184                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 185                 .attrs = {
 186                         {
 187                                 /* udp dest port - 68 (bootp client)*/
 188                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 189                                 .offset = offsetof(struct udphdr, dest),
 190                                 .val = cpu_to_be32(0x00440000),
 191                                 .mask = cpu_to_be32(0xffff0000),
 192                         },
 193                         {
 194                                 /* dhcp - lsb bytes of client hw address */
 195                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 196                                 .offset = 38,
 197                                 .mask = cpu_to_be32(0xffffffff),
 198                                 /* mark it as special field */
 199                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 200                         },
 201                 },
 202         },
 203         /* last filter must be empty */
 204         {},
 205 };
 206 #endif
 207
 208 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 209 {
 210         if (!iwl_mvm_is_d0i3_supported(mvm))
 211                 return;
 212
 213         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 214         spin_lock_bh(&mvm->refs_lock);
 215         mvm->refs[ref_type]++;
 216         spin_unlock_bh(&mvm->refs_lock);
 217         iwl_trans_ref(mvm->trans);
 218 }
 219
 220 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 221 {
 222         if (!iwl_mvm_is_d0i3_supported(mvm))
 223                 return;
 224
 225         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 226         spin_lock_bh(&mvm->refs_lock);
 227         WARN_ON(!mvm->refs[ref_type]--);
 228         spin_unlock_bh(&mvm->refs_lock);
 229         iwl_trans_unref(mvm->trans);
 230 }
 231
 232 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 233                                      enum iwl_mvm_ref_type except_ref)
 234 {
 235         int i, j;
 236
 237         if (!iwl_mvm_is_d0i3_supported(mvm))
 238                 return;
 239
 240         spin_lock_bh(&mvm->refs_lock);
 241         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 242                 if (except_ref == i || !mvm->refs[i])
 243                         continue;
 244
 245                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 246                               i, mvm->refs[i]);
 247                 for (j = 0; j < mvm->refs[i]; j++)
 248                         iwl_trans_unref(mvm->trans);
 249                 mvm->refs[i] = 0;
 250         }
 251         spin_unlock_bh(&mvm->refs_lock);
 252 }
 253
 254 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 255 {
 256         iwl_mvm_ref(mvm, ref_type);
 257
 258         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 259                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 260                                 HZ)) {
 261                 WARN_ON_ONCE(1);
 262                 iwl_mvm_unref(mvm, ref_type);
 263                 return -EIO;
 264         }
 265
 266         return 0;
 267 }
 268
 269 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 270 {
 271         int i;
 272
 273         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 274         for (i = 0; i < NUM_PHY_CTX; i++) {
 275                 mvm->phy_ctxts[i].id = i;
 276                 mvm->phy_ctxts[i].ref = 0;
 277         }
 278 }
 279
 280 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 281 {
 282         /* we create the 802.11 header and SSID element */
 283         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 284                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 285         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 286 }
 287
 288 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 289 {
 290         struct ieee80211_hw *hw = mvm->hw;
 291         int num_mac, ret, i;
 292
 293         /* Tell mac80211 our characteristics */
 294         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 295                     IEEE80211_HW_SPECTRUM_MGMT |
 296                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 297                     IEEE80211_HW_QUEUE_CONTROL |
 298                     IEEE80211_HW_WANT_MONITOR_VIF |
 299                     IEEE80211_HW_SUPPORTS_PS |
 300                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 301                     IEEE80211_HW_AMPDU_AGGREGATION |
 302                     IEEE80211_HW_TIMING_BEACON_ONLY |
 303                     IEEE80211_HW_CONNECTION_MONITOR |
 304                     IEEE80211_HW_CHANCTX_STA_CSA |
 305                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 306                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 307
 308         hw->queues = mvm->first_agg_queue;
 309         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 310         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 311                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 312         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 313         hw->rate_control_algorithm = "iwl-mvm-rs";
 314
 315         /*
 316          * Enable 11w if advertised by firmware and software crypto
 317          * is not enabled (as the firmware will interpret some mgmt
 318          * packets, so enabling it with software crypto isn't safe)
 319          */
 320         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 321             !iwlwifi_mod_params.sw_crypto)
 322                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 323
 324         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 325             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 326             !iwlwifi_mod_params.uapsd_disable) {
 327                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 328                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 329                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 330         }
 331
 332         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 333                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 334
 335         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 336         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 337         hw->chanctx_data_size = sizeof(u16);
 338
 339         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 340                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 341                 BIT(NL80211_IFTYPE_AP) |
 342                 BIT(NL80211_IFTYPE_P2P_GO) |
 343                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 344                 BIT(NL80211_IFTYPE_ADHOC);
 345
 346         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 347         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 348                                        REGULATORY_DISABLE_BEACON_HINTS;
 349
 350         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 351                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 352
 353         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 354                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 355
 356         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 357         hw->wiphy->n_iface_combinations =
 358                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 359
 360         hw->wiphy->max_remain_on_channel_duration = 10000;
 361         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 362
 363         /* Extract MAC address */
 364         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 365         hw->wiphy->addresses = mvm->addresses;
 366         hw->wiphy->n_addresses = 1;
 367
 368         /* Extract additional MAC addresses if available */
 369         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 370                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 371
 372         for (i = 1; i < num_mac; i++) {
 373                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 374                        ETH_ALEN);
 375                 mvm->addresses[i].addr[5]++;
 376                 hw->wiphy->n_addresses++;
 377         }
 378
 379         iwl_mvm_reset_phy_ctxts(mvm);
 380
 381         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 382
 383         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 384
 385         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 386                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 387                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 388         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 389                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 390                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 391
 392         hw->wiphy->hw_version = mvm->trans->hw_id;
 393
 394         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 395                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 396         else
 397                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 398
 399         /* TODO: enable that only for firmwares that don't crash */
 400         /* hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; */
 401         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 402         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 403         /* we create the 802.11 header and zero length SSID IE. */
 404         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 405
 406         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 407                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 408                                NL80211_FEATURE_P2P_GO_OPPPS;
 409
 410         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 411
 412         /* currently FW API supports only one optional cipher scheme */
 413         if (mvm->fw->cs[0].cipher) {
 414                 mvm->hw->n_cipher_schemes = 1;
 415                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 416         }
 417
 418 #ifdef CONFIG_PM_SLEEP
 419         if (iwl_mvm_is_d0i3_supported(mvm) &&
 420             device_can_wakeup(mvm->trans->dev)) {
 421                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 422                 hw->wiphy->wowlan = &mvm->wowlan;
 423         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 424             mvm->trans->ops->d3_suspend &&
 425             mvm->trans->ops->d3_resume &&
 426             device_can_wakeup(mvm->trans->dev)) {
 427                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 428                                     WIPHY_WOWLAN_DISCONNECT |
 429                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 430                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 431                 if (!iwlwifi_mod_params.sw_crypto)
 432                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 433                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 434                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 435
 436                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 437                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 438                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 439                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 440                 hw->wiphy->wowlan = &mvm->wowlan;
 441         }
 442 #endif
 443
 444 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 445         /* assign default bcast filtering configuration */
 446         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 447 #endif
 448
 449         ret = iwl_mvm_leds_init(mvm);
 450         if (ret)
 451                 return ret;
 452
 453         ret = ieee80211_register_hw(mvm->hw);
 454         if (ret)
 455                 iwl_mvm_leds_exit(mvm);
 456
 457         return ret;
 458 }
 459
 460 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 461                              struct ieee80211_sta *sta,
 462                              struct sk_buff *skb)
 463 {
 464         struct iwl_mvm_sta *mvmsta;
 465         bool defer = false;
 466
 467         /*
 468          * double check the IN_D0I3 flag both before and after
 469          * taking the spinlock, in order to prevent taking
 470          * the spinlock when not needed.
 471          */
 472         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 473                 return false;
 474
 475         spin_lock(&mvm->d0i3_tx_lock);
 476         /*
 477          * testing the flag again ensures the skb dequeue
 478          * loop (on d0i3 exit) hasn't run yet.
 479          */
 480         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 481                 goto out;
 482
 483         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 484         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 485             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 486                 goto out;
 487
 488         __skb_queue_tail(&mvm->d0i3_tx, skb);
 489         ieee80211_stop_queues(mvm->hw);
 490
 491         /* trigger wakeup */
 492         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 493         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 494
 495         defer = true;
 496 out:
 497         spin_unlock(&mvm->d0i3_tx_lock);
 498         return defer;
 499 }
 500
 501 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 502                            struct ieee80211_tx_control *control,
 503                            struct sk_buff *skb)
 504 {
 505         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 506         struct ieee80211_sta *sta = control->sta;
 507         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 508         struct ieee80211_hdr *hdr = (void *)skb->data;
 509
 510         if (iwl_mvm_is_radio_killed(mvm)) {
 511                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 512                 goto drop;
 513         }
 514
 515         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 516             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 517                 goto drop;
 518
 519         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 520         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 521                      ieee80211_is_mgmt(hdr->frame_control) &&
 522                      !ieee80211_is_deauth(hdr->frame_control) &&
 523                      !ieee80211_is_disassoc(hdr->frame_control) &&
 524                      !ieee80211_is_action(hdr->frame_control)))
 525                 sta = NULL;
 526
 527         if (sta) {
 528                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 529                         return;
 530                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 531                         goto drop;
 532                 return;
 533         }
 534
 535         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 536                 goto drop;
 537         return;
 538  drop:
 539         ieee80211_free_txskb(hw, skb);
 540 }
 541
 542 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 543 {
 544         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 545                 return false;
 546         return true;
 547 }
 548
 549 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 550 {
 551         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 552                 return false;
 553         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 554                 return true;
 555
 556         /* enabled by default */
 557         return true;
 558 }
 559
 560 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 561                                     struct ieee80211_vif *vif,
 562                                     enum ieee80211_ampdu_mlme_action action,
 563                                     struct ieee80211_sta *sta, u16 tid,
 564                                     u16 *ssn, u8 buf_size)
 565 {
 566         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 567         int ret;
 568         bool tx_agg_ref = false;
 569
 570         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 571                      sta->addr, tid, action);
 572
 573         if (!(mvm->nvm_data->sku_cap_11n_enable))
 574                 return -EACCES;
 575
 576         /* return from D0i3 before starting a new Tx aggregation */
 577         switch (action) {
 578         case IEEE80211_AMPDU_TX_START:
 579         case IEEE80211_AMPDU_TX_STOP_CONT:
 580         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 581         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 582         case IEEE80211_AMPDU_TX_OPERATIONAL:
 583                 /*
 584                  * for tx start, wait synchronously until D0i3 exit to
 585                  * get the correct sequence number for the tid.
 586                  * additionally, some other ampdu actions use direct
 587                  * target access, which is not handled automatically
 588                  * by the trans layer (unlike commands), so wait for
 589                  * d0i3 exit in these cases as well.
 590                  */
 591                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 592                 if (ret)
 593                         return ret;
 594
 595                 tx_agg_ref = true;
 596                 break;
 597         default:
 598                 break;
 599         }
 600
 601         mutex_lock(&mvm->mutex);
 602
 603         switch (action) {
 604         case IEEE80211_AMPDU_RX_START:
 605                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 606                         ret = -EINVAL;
 607                         break;
 608                 }
 609                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 610                 break;
 611         case IEEE80211_AMPDU_RX_STOP:
 612                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 613                 break;
 614         case IEEE80211_AMPDU_TX_START:
 615                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 616                         ret = -EINVAL;
 617                         break;
 618                 }
 619                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 620                 break;
 621         case IEEE80211_AMPDU_TX_STOP_CONT:
 622                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 623                 break;
 624         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 625         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 626                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 627                 break;
 628         case IEEE80211_AMPDU_TX_OPERATIONAL:
 629                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 630                 break;
 631         default:
 632                 WARN_ON_ONCE(1);
 633                 ret = -EINVAL;
 634                 break;
 635         }
 636         mutex_unlock(&mvm->mutex);
 637
 638         /*
 639          * If the tid is marked as started, we won't use it for offloaded
 640          * traffic on the next D0i3 entry. It's safe to unref.
 641          */
 642         if (tx_agg_ref)
 643                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 644
 645         return ret;
 646 }
 647
 648 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 649                                      struct ieee80211_vif *vif)
 650 {
 651         struct iwl_mvm *mvm = data;
 652         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 653
 654         mvmvif->uploaded = false;
 655         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 656
 657         /* does this make sense at all? */
 658         mvmvif->color++;
 659
 660         spin_lock_bh(&mvm->time_event_lock);
 661         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 662         spin_unlock_bh(&mvm->time_event_lock);
 663
 664         mvmvif->phy_ctxt = NULL;
 665         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 666 }
 667
 668 #ifdef CONFIG_IWLWIFI_DEBUGFS
 669 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 670 {
 671         struct iwl_fw_error_dump_file *dump_file;
 672         struct iwl_fw_error_dump_data *dump_data;
 673         struct iwl_fw_error_dump_info *dump_info;
 674         struct iwl_mvm_dump_ptrs *fw_error_dump;
 675         const struct fw_img *img;
 676         u32 sram_len, sram_ofs;
 677         u32 file_len, rxf_len;
 678         unsigned long flags;
 679         int reg_val;
 680
 681         lockdep_assert_held(&mvm->mutex);
 682
 683         if (mvm->fw_error_dump)
 684                 return;
 685
 686         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 687         if (!fw_error_dump)
 688                 return;
 689
 690         img = &mvm->fw->img[mvm->cur_ucode];
 691         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 692         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 693
 694         /* reading buffer size */
 695         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 696         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 697
 698         /* the register holds the value divided by 128 */
 699         rxf_len = rxf_len << 7;
 700
 701         file_len = sizeof(*dump_file) +
 702                    sizeof(*dump_data) * 3 +
 703                    sram_len +
 704                    rxf_len +
 705                    sizeof(*dump_info);
 706
 707         dump_file = vzalloc(file_len);
 708         if (!dump_file) {
 709                 kfree(fw_error_dump);
 710                 return;
 711         }
 712
 713         fw_error_dump->op_mode_ptr = dump_file;
 714
 715         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 716         dump_data = (void *)dump_file->data;
 717
 718         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 719         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 720         dump_info = (void *) dump_data->data;
 721         dump_info->device_family =
 722                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 723                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 724                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 725         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 726                sizeof(dump_info->fw_human_readable));
 727         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 728                 sizeof(dump_info->dev_human_readable));
 729         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 730                 sizeof(dump_info->bus_human_readable));
 731
 732         dump_data = iwl_fw_error_next_data(dump_data);
 733         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 734         dump_data->len = cpu_to_le32(rxf_len);
 735
 736         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 737                 u32 *rxf = (void *)dump_data->data;
 738                 int i;
 739
 740                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 741                         iwl_trans_write_prph(mvm->trans,
 742                                              RXF_LD_FENCE_OFFSET_ADDR,
 743                                              i * sizeof(u32));
 744                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 745                                                      RXF_FIFO_RD_FENCE_ADDR);
 746                 }
 747                 iwl_trans_release_nic_access(mvm->trans, &flags);
 748         }
 749
 750         dump_data = iwl_fw_error_next_data(dump_data);
 751         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 752         dump_data->len = cpu_to_le32(sram_len);
 753         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 754                                  sram_len);
 755
 756         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 757         fw_error_dump->op_mode_len = file_len;
 758         if (fw_error_dump->trans_ptr)
 759                 file_len += fw_error_dump->trans_ptr->len;
 760         dump_file->file_len = cpu_to_le32(file_len);
 761         mvm->fw_error_dump = fw_error_dump;
 762 }
 763 #endif
 764
 765 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 766 {
 767 #ifdef CONFIG_IWLWIFI_DEBUGFS
 768         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 769
 770         iwl_mvm_fw_error_dump(mvm);
 771
 772         /* notify the userspace about the error we had */
 773         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 774 #endif
 775
 776         iwl_trans_stop_device(mvm->trans);
 777
 778         mvm->scan_status = IWL_MVM_SCAN_NONE;
 779
 780         /* just in case one was running */
 781         ieee80211_remain_on_channel_expired(mvm->hw);
 782
 783         ieee80211_iterate_active_interfaces_atomic(
 784                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 785                 iwl_mvm_cleanup_iterator, mvm);
 786
 787         mvm->p2p_device_vif = NULL;
 788         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 789
 790         iwl_mvm_reset_phy_ctxts(mvm);
 791         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 792         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 793         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 794         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 795         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 796         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 797         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 798         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 799
 800         ieee80211_wake_queues(mvm->hw);
 801
 802         /* cleanup all stale references (scan, roc), but keep the
 803          * ucode_down ref until reconfig is complete */
 804         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 805
 806         mvm->vif_count = 0;
 807         mvm->rx_ba_sessions = 0;
 808 }
 809
 810 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 811 {
 812         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 813         int ret;
 814
 815         mutex_lock(&mvm->mutex);
 816
 817         /* Clean up some internal and mac80211 state on restart */
 818         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 819                 iwl_mvm_restart_cleanup(mvm);
 820
 821         ret = iwl_mvm_up(mvm);
 822
 823         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 824                 /* Something went wrong - we need to finish some cleanup
 825                  * that normally iwl_mvm_mac_restart_complete() below
 826                  * would do.
 827                  */
 828                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 829                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 830         }
 831
 832         mutex_unlock(&mvm->mutex);
 833
 834         return ret;
 835 }
 836
 837 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 838 {
 839         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 840         int ret;
 841
 842         mutex_lock(&mvm->mutex);
 843
 844         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 845         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 846         ret = iwl_mvm_update_quotas(mvm, NULL);
 847         if (ret)
 848                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 849                         ret);
 850
 851         /* allow transport/FW low power modes */
 852         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 853
 854         mutex_unlock(&mvm->mutex);
 855 }
 856
 857 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 858 {
 859         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 860
 861         flush_work(&mvm->d0i3_exit_work);
 862         flush_work(&mvm->async_handlers_wk);
 863
 864         mutex_lock(&mvm->mutex);
 865
 866         /* disallow low power states when the FW is down */
 867         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 868
 869         /* async_handlers_wk is now blocked */
 870
 871         /*
 872          * The work item could be running or queued if the
 873          * ROC time event stops just as we get here.
 874          */
 875         cancel_work_sync(&mvm->roc_done_wk);
 876
 877         iwl_trans_stop_device(mvm->trans);
 878
 879         iwl_mvm_async_handlers_purge(mvm);
 880         /* async_handlers_list is empty and will stay empty: HW is stopped */
 881
 882         /* the fw is stopped, the aux sta is dead: clean up driver state */
 883         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 884
 885         mutex_unlock(&mvm->mutex);
 886
 887         /*
 888          * The worker might have been waiting for the mutex, let it run and
 889          * discover that its list is now empty.
 890          */
 891         cancel_work_sync(&mvm->async_handlers_wk);
 892 }
 893
 894 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 895 {
 896         u16 i;
 897
 898         lockdep_assert_held(&mvm->mutex);
 899
 900         for (i = 0; i < NUM_PHY_CTX; i++)
 901                 if (!mvm->phy_ctxts[i].ref)
 902                         return &mvm->phy_ctxts[i];
 903
 904         IWL_ERR(mvm, "No available PHY context\n");
 905         return NULL;
 906 }
 907
 908 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 909                                 s8 tx_power)
 910 {
 911         /* FW is in charge of regulatory enforcement */
 912         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 913                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 914                 .pwr_restriction = cpu_to_le16(tx_power),
 915         };
 916
 917         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 918                                     sizeof(reduce_txpwr_cmd),
 919                                     &reduce_txpwr_cmd);
 920 }
 921
 922 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 923                                      struct ieee80211_vif *vif)
 924 {
 925         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 926         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 927         int ret;
 928
 929         /*
 930          * make sure D0i3 exit is completed, otherwise a target access
 931          * during tx queue configuration could be done when still in
 932          * D0i3 state.
 933          */
 934         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 935         if (ret)
 936                 return ret;
 937
 938         /*
 939          * Not much to do here. The stack will not allow interface
 940          * types or combinations that we didn't advertise, so we
 941          * don't really have to check the types.
 942          */
 943
 944         mutex_lock(&mvm->mutex);
 945
 946         /* Allocate resources for the MAC context, and add it to the fw  */
 947         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 948         if (ret)
 949                 goto out_unlock;
 950
 951         /* Counting number of interfaces is needed for legacy PM */
 952         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 953                 mvm->vif_count++;
 954
 955         /*
 956          * The AP binding flow can be done only after the beacon
 957          * template is configured (which happens only in the mac80211
 958          * start_ap() flow), and adding the broadcast station can happen
 959          * only after the binding.
 960          * In addition, since modifying the MAC before adding a bcast
 961          * station is not allowed by the FW, delay the adding of MAC context to
 962          * the point where we can also add the bcast station.
 963          * In short: there's not much we can do at this point, other than
 964          * allocating resources :)
 965          */
 966         if (vif->type == NL80211_IFTYPE_AP ||
 967             vif->type == NL80211_IFTYPE_ADHOC) {
 968                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 969                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 970                                                qmask,
 971                                                ieee80211_vif_type_p2p(vif));
 972                 if (ret) {
 973                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 974                         goto out_release;
 975                 }
 976
 977                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 978                 goto out_unlock;
 979         }
 980
 981         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 982         if (ret)
 983                 goto out_release;
 984
 985         ret = iwl_mvm_power_update_mac(mvm);
 986         if (ret)
 987                 goto out_release;
 988
 989         /* beacon filtering */
 990         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 991         if (ret)
 992                 goto out_remove_mac;
 993
 994         if (!mvm->bf_allowed_vif &&
 995             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 996                 mvm->bf_allowed_vif = mvmvif;
 997                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 998                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 999         }
1000
1001         /*
1002          * P2P_DEVICE interface does not have a channel context assigned to it,
1003          * so a dedicated PHY context is allocated to it and the corresponding
1004          * MAC context is bound to it at this stage.
1005          */
1006         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1007
1008                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1009                 if (!mvmvif->phy_ctxt) {
1010                         ret = -ENOSPC;
1011                         goto out_free_bf;
1012                 }
1013
1014                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1015                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1016                 if (ret)
1017                         goto out_unref_phy;
1018
1019                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1020                 if (ret)
1021                         goto out_unbind;
1022
1023                 /* Save a pointer to p2p device vif, so it can later be used to
1024                  * update the p2p device MAC when a GO is started/stopped */
1025                 mvm->p2p_device_vif = vif;
1026         }
1027
1028         iwl_mvm_vif_dbgfs_register(mvm, vif);
1029         goto out_unlock;
1030
1031  out_unbind:
1032         iwl_mvm_binding_remove_vif(mvm, vif);
1033  out_unref_phy:
1034         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1035  out_free_bf:
1036         if (mvm->bf_allowed_vif == mvmvif) {
1037                 mvm->bf_allowed_vif = NULL;
1038                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1039                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1040         }
1041  out_remove_mac:
1042         mvmvif->phy_ctxt = NULL;
1043         iwl_mvm_mac_ctxt_remove(mvm, vif);
1044  out_release:
1045         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1046                 mvm->vif_count--;
1047
1048         iwl_mvm_mac_ctxt_release(mvm, vif);
1049  out_unlock:
1050         mutex_unlock(&mvm->mutex);
1051
1052         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1053
1054         return ret;
1055 }
1056
1057 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1058                                         struct ieee80211_vif *vif)
1059 {
1060         u32 tfd_msk = 0, ac;
1061
1062         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1063                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1064                         tfd_msk |= BIT(vif->hw_queue[ac]);
1065
1066         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1067                 tfd_msk |= BIT(vif->cab_queue);
1068
1069         if (tfd_msk) {
1070                 mutex_lock(&mvm->mutex);
1071                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1072                 mutex_unlock(&mvm->mutex);
1073         }
1074
1075         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1076                 /*
1077                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1078                  * We assume here that all the packets sent to the OFFCHANNEL
1079                  * queue are sent in ROC session.
1080                  */
1081                 flush_work(&mvm->roc_done_wk);
1082         } else {
1083                 /*
1084                  * By now, all the AC queues are empty. The AGG queues are
1085                  * empty too. We already got all the Tx responses for all the
1086                  * packets in the queues. The drain work can have been
1087                  * triggered. Flush it.
1088                  */
1089                 flush_work(&mvm->sta_drained_wk);
1090         }
1091 }
1092
1093 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1094                                          struct ieee80211_vif *vif)
1095 {
1096         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1097         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1098
1099         iwl_mvm_prepare_mac_removal(mvm, vif);
1100
1101         mutex_lock(&mvm->mutex);
1102
1103         if (mvm->bf_allowed_vif == mvmvif) {
1104                 mvm->bf_allowed_vif = NULL;
1105                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1106                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1107         }
1108
1109         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1110
1111         /*
1112          * For AP/GO interface, the tear down of the resources allocated to the
1113          * interface is be handled as part of the stop_ap flow.
1114          */
1115         if (vif->type == NL80211_IFTYPE_AP ||
1116             vif->type == NL80211_IFTYPE_ADHOC) {
1117 #ifdef CONFIG_NL80211_TESTMODE
1118                 if (vif == mvm->noa_vif) {
1119                         mvm->noa_vif = NULL;
1120                         mvm->noa_duration = 0;
1121                 }
1122 #endif
1123                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1124                 goto out_release;
1125         }
1126
1127         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1128                 mvm->p2p_device_vif = NULL;
1129                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1130                 iwl_mvm_binding_remove_vif(mvm, vif);
1131                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1132                 mvmvif->phy_ctxt = NULL;
1133         }
1134
1135         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1136                 mvm->vif_count--;
1137
1138         iwl_mvm_power_update_mac(mvm);
1139         iwl_mvm_mac_ctxt_remove(mvm, vif);
1140
1141 out_release:
1142         iwl_mvm_mac_ctxt_release(mvm, vif);
1143         mutex_unlock(&mvm->mutex);
1144 }
1145
1146 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1147 {
1148         return 0;
1149 }
1150
1151 struct iwl_mvm_mc_iter_data {
1152         struct iwl_mvm *mvm;
1153         int port_id;
1154 };
1155
1156 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1157                                       struct ieee80211_vif *vif)
1158 {
1159         struct iwl_mvm_mc_iter_data *data = _data;
1160         struct iwl_mvm *mvm = data->mvm;
1161         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1162         int ret, len;
1163
1164         /* if we don't have free ports, mcast frames will be dropped */
1165         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1166                 return;
1167
1168         if (vif->type != NL80211_IFTYPE_STATION ||
1169             !vif->bss_conf.assoc)
1170                 return;
1171
1172         cmd->port_id = data->port_id++;
1173         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1174         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1175
1176         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1177         if (ret)
1178                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1179 }
1180
1181 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1182 {
1183         struct iwl_mvm_mc_iter_data iter_data = {
1184                 .mvm = mvm,
1185         };
1186
1187         lockdep_assert_held(&mvm->mutex);
1188
1189         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1190                 return;
1191
1192         ieee80211_iterate_active_interfaces_atomic(
1193                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1194                 iwl_mvm_mc_iface_iterator, &iter_data);
1195 }
1196
1197 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1198                                      struct netdev_hw_addr_list *mc_list)
1199 {
1200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1201         struct iwl_mcast_filter_cmd *cmd;
1202         struct netdev_hw_addr *addr;
1203         int addr_count = netdev_hw_addr_list_count(mc_list);
1204         bool pass_all = false;
1205         int len;
1206
1207         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1208                 pass_all = true;
1209                 addr_count = 0;
1210         }
1211
1212         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1213         cmd = kzalloc(len, GFP_ATOMIC);
1214         if (!cmd)
1215                 return 0;
1216
1217         if (pass_all) {
1218                 cmd->pass_all = 1;
1219                 return (u64)(unsigned long)cmd;
1220         }
1221
1222         netdev_hw_addr_list_for_each(addr, mc_list) {
1223                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1224                                    cmd->count, addr->addr);
1225                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1226                        addr->addr, ETH_ALEN);
1227                 cmd->count++;
1228         }
1229
1230         return (u64)(unsigned long)cmd;
1231 }
1232
1233 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1234                                      unsigned int changed_flags,
1235                                      unsigned int *total_flags,
1236                                      u64 multicast)
1237 {
1238         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1239         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1240
1241         mutex_lock(&mvm->mutex);
1242
1243         /* replace previous configuration */
1244         kfree(mvm->mcast_filter_cmd);
1245         mvm->mcast_filter_cmd = cmd;
1246
1247         if (!cmd)
1248                 goto out;
1249
1250         iwl_mvm_recalc_multicast(mvm);
1251 out:
1252         mutex_unlock(&mvm->mutex);
1253         *total_flags = 0;
1254 }
1255
1256 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1257 struct iwl_bcast_iter_data {
1258         struct iwl_mvm *mvm;
1259         struct iwl_bcast_filter_cmd *cmd;
1260         u8 current_filter;
1261 };
1262
1263 static void
1264 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1265                          const struct iwl_fw_bcast_filter *in_filter,
1266                          struct iwl_fw_bcast_filter *out_filter)
1267 {
1268         struct iwl_fw_bcast_filter_attr *attr;
1269         int i;
1270
1271         memcpy(out_filter, in_filter, sizeof(*out_filter));
1272
1273         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1274                 attr = &out_filter->attrs[i];
1275
1276                 if (!attr->mask)
1277                         break;
1278
1279                 switch (attr->reserved1) {
1280                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1281                         if (vif->bss_conf.arp_addr_cnt != 1) {
1282                                 attr->mask = 0;
1283                                 continue;
1284                         }
1285
1286                         attr->val = vif->bss_conf.arp_addr_list[0];
1287                         break;
1288                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1289                         attr->val = *(__be32 *)&vif->addr[2];
1290                         break;
1291                 default:
1292                         break;
1293                 }
1294                 attr->reserved1 = 0;
1295                 out_filter->num_attrs++;
1296         }
1297 }
1298
1299 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1300                                           struct ieee80211_vif *vif)
1301 {
1302         struct iwl_bcast_iter_data *data = _data;
1303         struct iwl_mvm *mvm = data->mvm;
1304         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1305         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1306         struct iwl_fw_bcast_mac *bcast_mac;
1307         int i;
1308
1309         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1310                 return;
1311
1312         bcast_mac = &cmd->macs[mvmvif->id];
1313
1314         /*
1315          * enable filtering only for associated stations, but not for P2P
1316          * Clients
1317          */
1318         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1319             !vif->bss_conf.assoc)
1320                 return;
1321
1322         bcast_mac->default_discard = 1;
1323
1324         /* copy all configured filters */
1325         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1326                 /*
1327                  * Make sure we don't exceed our filters limit.
1328                  * if there is still a valid filter to be configured,
1329                  * be on the safe side and just allow bcast for this mac.
1330                  */
1331                 if (WARN_ON_ONCE(data->current_filter >=
1332                                  ARRAY_SIZE(cmd->filters))) {
1333                         bcast_mac->default_discard = 0;
1334                         bcast_mac->attached_filters = 0;
1335                         break;
1336                 }
1337
1338                 iwl_mvm_set_bcast_filter(vif,
1339                                          &mvm->bcast_filters[i],
1340                                          &cmd->filters[data->current_filter]);
1341
1342                 /* skip current filter if it contains no attributes */
1343                 if (!cmd->filters[data->current_filter].num_attrs)
1344                         continue;
1345
1346                 /* attach the filter to current mac */
1347                 bcast_mac->attached_filters |=
1348                                 cpu_to_le16(BIT(data->current_filter));
1349
1350                 data->current_filter++;
1351         }
1352 }
1353
1354 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1355                                     struct iwl_bcast_filter_cmd *cmd)
1356 {
1357         struct iwl_bcast_iter_data iter_data = {
1358                 .mvm = mvm,
1359                 .cmd = cmd,
1360         };
1361
1362         memset(cmd, 0, sizeof(*cmd));
1363         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1364         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1365
1366 #ifdef CONFIG_IWLWIFI_DEBUGFS
1367         /* use debugfs filters/macs if override is configured */
1368         if (mvm->dbgfs_bcast_filtering.override) {
1369                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1370                        sizeof(cmd->filters));
1371                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1372                        sizeof(cmd->macs));
1373                 return true;
1374         }
1375 #endif
1376
1377         /* if no filters are configured, do nothing */
1378         if (!mvm->bcast_filters)
1379                 return false;
1380
1381         /* configure and attach these filters for each associated sta vif */
1382         ieee80211_iterate_active_interfaces(
1383                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1384                 iwl_mvm_bcast_filter_iterator, &iter_data);
1385
1386         return true;
1387 }
1388 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1389                                           struct ieee80211_vif *vif)
1390 {
1391         struct iwl_bcast_filter_cmd cmd;
1392
1393         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1394                 return 0;
1395
1396         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1397                 return 0;
1398
1399         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1400                                     sizeof(cmd), &cmd);
1401 }
1402 #else
1403 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1404                                                  struct ieee80211_vif *vif)
1405 {
1406         return 0;
1407 }
1408 #endif
1409
1410 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1411 {
1412         struct ieee80211_sta *sta;
1413         struct iwl_mvm_sta *mvmsta;
1414         int i;
1415
1416         lockdep_assert_held(&mvm->mutex);
1417
1418         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1419                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1420                                                 lockdep_is_held(&mvm->mutex));
1421                 if (!sta || IS_ERR(sta) || !sta->tdls)
1422                         continue;
1423
1424                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1425                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1426                                 NL80211_TDLS_TEARDOWN,
1427                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1428                                 GFP_KERNEL);
1429         }
1430 }
1431
1432 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1433                                              struct ieee80211_vif *vif,
1434                                              struct ieee80211_bss_conf *bss_conf,
1435                                              u32 changes)
1436 {
1437         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1438         int ret;
1439
1440         /*
1441          * Re-calculate the tsf id, as the master-slave relations depend on the
1442          * beacon interval, which was not known when the station interface was
1443          * added.
1444          */
1445         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1446                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1447
1448         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1449         if (ret)
1450                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1451
1452         if (changes & BSS_CHANGED_ASSOC) {
1453                 if (bss_conf->assoc) {
1454                         /* add quota for this interface */
1455                         ret = iwl_mvm_update_quotas(mvm, NULL);
1456                         if (ret) {
1457                                 IWL_ERR(mvm, "failed to update quotas\n");
1458                                 return;
1459                         }
1460
1461                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1462                                      &mvm->status)) {
1463                                 /*
1464                                  * If we're restarting then the firmware will
1465                                  * obviously have lost synchronisation with
1466                                  * the AP. It will attempt to synchronise by
1467                                  * itself, but we can make it more reliable by
1468                                  * scheduling a session protection time event.
1469                                  *
1470                                  * The firmware needs to receive a beacon to
1471                                  * catch up with synchronisation, use 110% of
1472                                  * the beacon interval.
1473                                  *
1474                                  * Set a large maximum delay to allow for more
1475                                  * than a single interface.
1476                                  */
1477                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1478                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1479                                                         5 * dur);
1480                         }
1481
1482                         iwl_mvm_sf_update(mvm, vif, false);
1483                         iwl_mvm_power_vif_assoc(mvm, vif);
1484                         if (vif->p2p)
1485                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1486                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1487                         /*
1488                          * If update fails - SF might be running in associated
1489                          * mode while disassociated - which is forbidden.
1490                          */
1491                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1492                                   "Failed to update SF upon disassociation\n");
1493
1494                         /* remove AP station now that the MAC is unassoc */
1495                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1496                         if (ret)
1497                                 IWL_ERR(mvm, "failed to remove AP station\n");
1498
1499                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1500                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1501                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1502                         /* remove quota for this interface */
1503                         ret = iwl_mvm_update_quotas(mvm, NULL);
1504                         if (ret)
1505                                 IWL_ERR(mvm, "failed to update quotas\n");
1506
1507                         if (vif->p2p)
1508                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1509                 }
1510
1511                 iwl_mvm_recalc_multicast(mvm);
1512                 iwl_mvm_configure_bcast_filter(mvm, vif);
1513
1514                 /* reset rssi values */
1515                 mvmvif->bf_data.ave_beacon_signal = 0;
1516
1517                 iwl_mvm_bt_coex_vif_change(mvm);
1518                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1519                                     IEEE80211_SMPS_AUTOMATIC);
1520         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1521                 /*
1522                  * We received a beacon _after_ association so
1523                  * remove the session protection.
1524                  */
1525                 iwl_mvm_remove_time_event(mvm, mvmvif,
1526                                           &mvmvif->time_event_data);
1527         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1528                               BSS_CHANGED_QOS)) {
1529                 ret = iwl_mvm_power_update_mac(mvm);
1530                 if (ret)
1531                         IWL_ERR(mvm, "failed to update power mode\n");
1532         }
1533
1534         if (changes & BSS_CHANGED_BEACON_INFO) {
1535                 iwl_mvm_sf_update(mvm, vif, false);
1536                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1537         }
1538
1539         if (changes & BSS_CHANGED_TXPOWER) {
1540                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1541                                 bss_conf->txpower);
1542                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1543         }
1544
1545         if (changes & BSS_CHANGED_CQM) {
1546                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1547                 /* reset cqm events tracking */
1548                 mvmvif->bf_data.last_cqm_event = 0;
1549                 if (mvmvif->bf_data.bf_enabled) {
1550                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1551                         if (ret)
1552                                 IWL_ERR(mvm,
1553                                         "failed to update CQM thresholds\n");
1554                 }
1555         }
1556
1557         if (changes & BSS_CHANGED_ARP_FILTER) {
1558                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1559                 iwl_mvm_configure_bcast_filter(mvm, vif);
1560         }
1561 }
1562
1563 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1564                                  struct ieee80211_vif *vif)
1565 {
1566         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1567         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1568         int ret;
1569
1570         /*
1571          * iwl_mvm_mac_ctxt_add() might read directly from the device
1572          * (the system time), so make sure it is available.
1573          */
1574         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1575         if (ret)
1576                 return ret;
1577
1578         mutex_lock(&mvm->mutex);
1579
1580         /* Send the beacon template */
1581         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1582         if (ret)
1583                 goto out_unlock;
1584
1585         /*
1586          * Re-calculate the tsf id, as the master-slave relations depend on the
1587          * beacon interval, which was not known when the AP interface was added.
1588          */
1589         if (vif->type == NL80211_IFTYPE_AP)
1590                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1591
1592         /* Add the mac context */
1593         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1594         if (ret)
1595                 goto out_unlock;
1596
1597         /* Perform the binding */
1598         ret = iwl_mvm_binding_add_vif(mvm, vif);
1599         if (ret)
1600                 goto out_remove;
1601
1602         /* Send the bcast station. At this stage the TBTT and DTIM time events
1603          * are added and applied to the scheduler */
1604         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1605         if (ret)
1606                 goto out_unbind;
1607
1608         /* must be set before quota calculations */
1609         mvmvif->ap_ibss_active = true;
1610
1611         /* power updated needs to be done before quotas */
1612         iwl_mvm_power_update_mac(mvm);
1613
1614         ret = iwl_mvm_update_quotas(mvm, NULL);
1615         if (ret)
1616                 goto out_quota_failed;
1617
1618         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1619         if (vif->p2p && mvm->p2p_device_vif)
1620                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1621
1622         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1623
1624         iwl_mvm_bt_coex_vif_change(mvm);
1625
1626         /* we don't support TDLS during DCM */
1627         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1628                 iwl_mvm_teardown_tdls_peers(mvm);
1629
1630         mutex_unlock(&mvm->mutex);
1631         return 0;
1632
1633 out_quota_failed:
1634         iwl_mvm_power_update_mac(mvm);
1635         mvmvif->ap_ibss_active = false;
1636         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1637 out_unbind:
1638         iwl_mvm_binding_remove_vif(mvm, vif);
1639 out_remove:
1640         iwl_mvm_mac_ctxt_remove(mvm, vif);
1641 out_unlock:
1642         mutex_unlock(&mvm->mutex);
1643         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1644         return ret;
1645 }
1646
1647 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1648                                  struct ieee80211_vif *vif)
1649 {
1650         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1651         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1652
1653         iwl_mvm_prepare_mac_removal(mvm, vif);
1654
1655         mutex_lock(&mvm->mutex);
1656
1657         /* Handle AP stop while in CSA */
1658         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1659                 iwl_mvm_remove_time_event(mvm, mvmvif,
1660                                           &mvmvif->time_event_data);
1661                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1662         }
1663
1664         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1665                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1666                 mvm->csa_tx_block_bcn_timeout = 0;
1667         }
1668
1669         mvmvif->ap_ibss_active = false;
1670         mvm->ap_last_beacon_gp2 = 0;
1671
1672         iwl_mvm_bt_coex_vif_change(mvm);
1673
1674         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1675
1676         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1677         if (vif->p2p && mvm->p2p_device_vif)
1678                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1679
1680         iwl_mvm_update_quotas(mvm, NULL);
1681         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1682         iwl_mvm_binding_remove_vif(mvm, vif);
1683
1684         iwl_mvm_power_update_mac(mvm);
1685
1686         iwl_mvm_mac_ctxt_remove(mvm, vif);
1687
1688         mutex_unlock(&mvm->mutex);
1689 }
1690
1691 static void
1692 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1693                                  struct ieee80211_vif *vif,
1694                                  struct ieee80211_bss_conf *bss_conf,
1695                                  u32 changes)
1696 {
1697         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1698
1699         /* Changes will be applied when the AP/IBSS is started */
1700         if (!mvmvif->ap_ibss_active)
1701                 return;
1702
1703         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1704                        BSS_CHANGED_BANDWIDTH) &&
1705             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1706                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1707
1708         /* Need to send a new beacon template to the FW */
1709         if (changes & BSS_CHANGED_BEACON &&
1710             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1711                 IWL_WARN(mvm, "Failed updating beacon data\n");
1712 }
1713
1714 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1715                                      struct ieee80211_vif *vif,
1716                                      struct ieee80211_bss_conf *bss_conf,
1717                                      u32 changes)
1718 {
1719         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1720
1721         /*
1722          * iwl_mvm_bss_info_changed_station() might call
1723          * iwl_mvm_protect_session(), which reads directly from
1724          * the device (the system time), so make sure it is available.
1725          */
1726         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1727                 return;
1728
1729         mutex_lock(&mvm->mutex);
1730
1731         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1732                 iwl_mvm_scan_offload_stop(mvm, true);
1733
1734         switch (vif->type) {
1735         case NL80211_IFTYPE_STATION:
1736                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1737                 break;
1738         case NL80211_IFTYPE_AP:
1739         case NL80211_IFTYPE_ADHOC:
1740                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1741                 break;
1742         default:
1743                 /* shouldn't happen */
1744                 WARN_ON_ONCE(1);
1745         }
1746
1747         mutex_unlock(&mvm->mutex);
1748         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1749 }
1750
1751 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1752                                           enum iwl_scan_status scan_type)
1753 {
1754         int ret;
1755         bool wait_for_handlers = false;
1756
1757         mutex_lock(&mvm->mutex);
1758
1759         if (mvm->scan_status != scan_type) {
1760                 ret = 0;
1761                 /* make sure there are no pending notifications */
1762                 wait_for_handlers = true;
1763                 goto out;
1764         }
1765
1766         switch (scan_type) {
1767         case IWL_MVM_SCAN_SCHED:
1768                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1769                 break;
1770         case IWL_MVM_SCAN_OS:
1771                 ret = iwl_mvm_cancel_scan(mvm);
1772                 break;
1773         case IWL_MVM_SCAN_NONE:
1774         default:
1775                 WARN_ON_ONCE(1);
1776                 ret = -EINVAL;
1777                 break;
1778         }
1779         if (ret)
1780                 goto out;
1781
1782         wait_for_handlers = true;
1783 out:
1784         mutex_unlock(&mvm->mutex);
1785
1786         /* make sure we consume the completion notification */
1787         if (wait_for_handlers)
1788                 iwl_mvm_wait_for_async_handlers(mvm);
1789
1790         return ret;
1791 }
1792 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1793                                struct ieee80211_vif *vif,
1794                                struct ieee80211_scan_request *hw_req)
1795 {
1796         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1797         struct cfg80211_scan_request *req = &hw_req->req;
1798         int ret;
1799
1800         if (req->n_channels == 0 ||
1801             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1802                 return -EINVAL;
1803
1804         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1805         if (ret)
1806                 return ret;
1807
1808         mutex_lock(&mvm->mutex);
1809
1810         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1811                 ret = -EBUSY;
1812                 goto out;
1813         }
1814
1815         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1816
1817         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1818                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1819         else
1820                 ret = iwl_mvm_scan_request(mvm, vif, req);
1821
1822         if (ret)
1823                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1824 out:
1825         mutex_unlock(&mvm->mutex);
1826         return ret;
1827 }
1828
1829 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1830                                        struct ieee80211_vif *vif)
1831 {
1832         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1833
1834         mutex_lock(&mvm->mutex);
1835
1836         iwl_mvm_cancel_scan(mvm);
1837
1838         mutex_unlock(&mvm->mutex);
1839 }
1840
1841 static void
1842 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1843                                   struct ieee80211_sta *sta, u16 tids,
1844                                   int num_frames,
1845                                   enum ieee80211_frame_release_type reason,
1846                                   bool more_data)
1847 {
1848         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1849
1850         /* Called when we need to transmit (a) frame(s) from mac80211 */
1851
1852         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1853                                           tids, more_data, false);
1854 }
1855
1856 static void
1857 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1858                                     struct ieee80211_sta *sta, u16 tids,
1859                                     int num_frames,
1860                                     enum ieee80211_frame_release_type reason,
1861                                     bool more_data)
1862 {
1863         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1864
1865         /* Called when we need to transmit (a) frame(s) from agg queue */
1866
1867         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1868                                           tids, more_data, true);
1869 }
1870
1871 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1872                                    struct ieee80211_vif *vif,
1873                                    enum sta_notify_cmd cmd,
1874                                    struct ieee80211_sta *sta)
1875 {
1876         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1877         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1878         int tid;
1879
1880         switch (cmd) {
1881         case STA_NOTIFY_SLEEP:
1882                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1883                         ieee80211_sta_block_awake(hw, sta, true);
1884                 spin_lock_bh(&mvmsta->lock);
1885                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1886                         struct iwl_mvm_tid_data *tid_data;
1887
1888                         tid_data = &mvmsta->tid_data[tid];
1889                         if (tid_data->state != IWL_AGG_ON &&
1890                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1891                                 continue;
1892                         if (iwl_mvm_tid_queued(tid_data) == 0)
1893                                 continue;
1894                         ieee80211_sta_set_buffered(sta, tid, true);
1895                 }
1896                 spin_unlock_bh(&mvmsta->lock);
1897                 /*
1898                  * The fw updates the STA to be asleep. Tx packets on the Tx
1899                  * queues to this station will not be transmitted. The fw will
1900                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1901                  */
1902                 break;
1903         case STA_NOTIFY_AWAKE:
1904                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1905                         break;
1906                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1907                 break;
1908         default:
1909                 break;
1910         }
1911 }
1912
1913 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1914                                        struct ieee80211_vif *vif,
1915                                        struct ieee80211_sta *sta)
1916 {
1917         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1918         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1919
1920         /*
1921          * This is called before mac80211 does RCU synchronisation,
1922          * so here we already invalidate our internal RCU-protected
1923          * station pointer. The rest of the code will thus no longer
1924          * be able to find the station this way, and we don't rely
1925          * on further RCU synchronisation after the sta_state()
1926          * callback deleted the station.
1927          */
1928         mutex_lock(&mvm->mutex);
1929         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1930                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1931                                    ERR_PTR(-ENOENT));
1932         mutex_unlock(&mvm->mutex);
1933 }
1934
1935 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1936 {
1937         struct ieee80211_sta *sta;
1938         struct iwl_mvm_sta *mvmsta;
1939         int count = 0;
1940         int i;
1941
1942         lockdep_assert_held(&mvm->mutex);
1943
1944         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1945                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1946                                                 lockdep_is_held(&mvm->mutex));
1947                 if (!sta || IS_ERR(sta) || !sta->tdls)
1948                         continue;
1949
1950                 if (vif) {
1951                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1952                         if (mvmsta->vif != vif)
1953                                 continue;
1954                 }
1955
1956                 count++;
1957         }
1958
1959         return count;
1960 }
1961
1962 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1963                                       struct ieee80211_vif *vif,
1964                                       bool sta_added)
1965 {
1966         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1967
1968         /*
1969          * Disable ps when the first TDLS sta is added and re-enable it
1970          * when the last TDLS sta is removed
1971          */
1972         if ((tdls_sta_cnt == 1 && sta_added) ||
1973             (tdls_sta_cnt == 0 && !sta_added))
1974                 iwl_mvm_power_update_mac(mvm);
1975 }
1976
1977 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1978                                  struct ieee80211_vif *vif,
1979                                  struct ieee80211_sta *sta,
1980                                  enum ieee80211_sta_state old_state,
1981                                  enum ieee80211_sta_state new_state)
1982 {
1983         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1984         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1985         int ret;
1986
1987         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1988                            sta->addr, old_state, new_state);
1989
1990         /* this would be a mac80211 bug ... but don't crash */
1991         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1992                 return -EINVAL;
1993
1994         /* if a STA is being removed, reuse its ID */
1995         flush_work(&mvm->sta_drained_wk);
1996
1997         mutex_lock(&mvm->mutex);
1998         if (old_state == IEEE80211_STA_NOTEXIST &&
1999             new_state == IEEE80211_STA_NONE) {
2000                 /*
2001                  * Firmware bug - it'll crash if the beacon interval is less
2002                  * than 16. We can't avoid connecting at all, so refuse the
2003                  * station state change, this will cause mac80211 to abandon
2004                  * attempts to connect to this AP, and eventually wpa_s will
2005                  * blacklist the AP...
2006                  */
2007                 if (vif->type == NL80211_IFTYPE_STATION &&
2008                     vif->bss_conf.beacon_int < 16) {
2009                         IWL_ERR(mvm,
2010                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2011                                 sta->addr, vif->bss_conf.beacon_int);
2012                         ret = -EINVAL;
2013                         goto out_unlock;
2014                 }
2015
2016                 if (sta->tdls &&
2017                     (vif->p2p ||
2018                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2019                                                 IWL_MVM_TDLS_STA_COUNT ||
2020                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2021                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2022                         ret = -EBUSY;
2023                         goto out_unlock;
2024                 }
2025
2026                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2027                 if (sta->tdls && ret == 0)
2028                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2029         } else if (old_state == IEEE80211_STA_NONE &&
2030                    new_state == IEEE80211_STA_AUTH) {
2031                 /*
2032                  * EBS may be disabled due to previous failures reported by FW.
2033                  * Reset EBS status here assuming environment has been changed.
2034                  */
2035                 mvm->last_ebs_successful = true;
2036                 ret = 0;
2037         } else if (old_state == IEEE80211_STA_AUTH &&
2038                    new_state == IEEE80211_STA_ASSOC) {
2039                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2040                 if (ret == 0)
2041                         iwl_mvm_rs_rate_init(mvm, sta,
2042                                              mvmvif->phy_ctxt->channel->band,
2043                                              true);
2044         } else if (old_state == IEEE80211_STA_ASSOC &&
2045                    new_state == IEEE80211_STA_AUTHORIZED) {
2046
2047                 /* we don't support TDLS during DCM */
2048                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2049                         iwl_mvm_teardown_tdls_peers(mvm);
2050
2051                 /* enable beacon filtering */
2052                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2053                 ret = 0;
2054         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2055                    new_state == IEEE80211_STA_ASSOC) {
2056                 /* disable beacon filtering */
2057                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2058                 ret = 0;
2059         } else if (old_state == IEEE80211_STA_ASSOC &&
2060                    new_state == IEEE80211_STA_AUTH) {
2061                 ret = 0;
2062         } else if (old_state == IEEE80211_STA_AUTH &&
2063                    new_state == IEEE80211_STA_NONE) {
2064                 ret = 0;
2065         } else if (old_state == IEEE80211_STA_NONE &&
2066                    new_state == IEEE80211_STA_NOTEXIST) {
2067                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2068                 if (sta->tdls)
2069                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2070         } else {
2071                 ret = -EIO;
2072         }
2073  out_unlock:
2074         mutex_unlock(&mvm->mutex);
2075
2076         return ret;
2077 }
2078
2079 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2080 {
2081         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2082
2083         mvm->rts_threshold = value;
2084
2085         return 0;
2086 }
2087
2088 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2089                                   struct ieee80211_vif *vif,
2090                                   struct ieee80211_sta *sta, u32 changed)
2091 {
2092         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2093
2094         if (vif->type == NL80211_IFTYPE_STATION &&
2095             changed & IEEE80211_RC_NSS_CHANGED)
2096                 iwl_mvm_sf_update(mvm, vif, false);
2097 }
2098
2099 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2100                                struct ieee80211_vif *vif, u16 ac,
2101                                const struct ieee80211_tx_queue_params *params)
2102 {
2103         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2104         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2105
2106         mvmvif->queue_params[ac] = *params;
2107
2108         /*
2109          * No need to update right away, we'll get BSS_CHANGED_QOS
2110          * The exception is P2P_DEVICE interface which needs immediate update.
2111          */
2112         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2113                 int ret;
2114
2115                 mutex_lock(&mvm->mutex);
2116                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2117                 mutex_unlock(&mvm->mutex);
2118                 return ret;
2119         }
2120         return 0;
2121 }
2122
2123 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2124                                       struct ieee80211_vif *vif)
2125 {
2126         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2127         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2128                            200 + vif->bss_conf.beacon_int);
2129         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2130                                100 + vif->bss_conf.beacon_int);
2131
2132         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2133                 return;
2134
2135         /*
2136          * iwl_mvm_protect_session() reads directly from the device
2137          * (the system time), so make sure it is available.
2138          */
2139         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2140                 return;
2141
2142         mutex_lock(&mvm->mutex);
2143         /* Try really hard to protect the session and hear a beacon */
2144         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
2145         mutex_unlock(&mvm->mutex);
2146
2147         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2148 }
2149
2150 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2151                                                   struct ieee80211_vif *vif)
2152 {
2153         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2154         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2155
2156         /*
2157          * iwl_mvm_protect_session() reads directly from the device
2158          * (the system time), so make sure it is available.
2159          */
2160         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2161                 return;
2162
2163         mutex_lock(&mvm->mutex);
2164         /* Protect the session to hear the TDLS setup response on the channel */
2165         iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
2166         mutex_unlock(&mvm->mutex);
2167
2168         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2169 }
2170
2171 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2172                                         struct ieee80211_vif *vif,
2173                                         struct cfg80211_sched_scan_request *req,
2174                                         struct ieee80211_scan_ies *ies)
2175 {
2176         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2177         int ret;
2178
2179         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2180         if (ret)
2181                 return ret;
2182
2183         mutex_lock(&mvm->mutex);
2184
2185         if (!iwl_mvm_is_idle(mvm)) {
2186                 ret = -EBUSY;
2187                 goto out;
2188         }
2189
2190         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2191                 ret = -EBUSY;
2192                 goto out;
2193         }
2194
2195         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2196
2197         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2198                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2199                 if (ret)
2200                         goto err;
2201         }
2202
2203         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2204         if (ret)
2205                 goto err;
2206
2207         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2208                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2209         else
2210                 ret = iwl_mvm_sched_scan_start(mvm, req);
2211
2212         if (!ret)
2213                 goto out;
2214 err:
2215         mvm->scan_status = IWL_MVM_SCAN_NONE;
2216 out:
2217         mutex_unlock(&mvm->mutex);
2218         return ret;
2219 }
2220
2221 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2222                                        struct ieee80211_vif *vif)
2223 {
2224         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2225         int ret;
2226
2227         mutex_lock(&mvm->mutex);
2228         ret = iwl_mvm_scan_offload_stop(mvm, false);
2229         mutex_unlock(&mvm->mutex);
2230         iwl_mvm_wait_for_async_handlers(mvm);
2231
2232         return ret;
2233 }
2234
2235 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2236                                enum set_key_cmd cmd,
2237                                struct ieee80211_vif *vif,
2238                                struct ieee80211_sta *sta,
2239                                struct ieee80211_key_conf *key)
2240 {
2241         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2242         int ret;
2243
2244         if (iwlwifi_mod_params.sw_crypto) {
2245                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2246                 return -EOPNOTSUPP;
2247         }
2248
2249         switch (key->cipher) {
2250         case WLAN_CIPHER_SUITE_TKIP:
2251                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2252                 /* fall-through */
2253         case WLAN_CIPHER_SUITE_CCMP:
2254                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2255                 break;
2256         case WLAN_CIPHER_SUITE_AES_CMAC:
2257                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2258                 break;
2259         case WLAN_CIPHER_SUITE_WEP40:
2260         case WLAN_CIPHER_SUITE_WEP104:
2261                 /*
2262                  * Support for TX only, at least for now, so accept
2263                  * the key and do nothing else. Then mac80211 will
2264                  * pass it for TX but we don't have to use it for RX.
2265                  */
2266                 return 0;
2267         default:
2268                 /* currently FW supports only one optional cipher scheme */
2269                 if (hw->n_cipher_schemes &&
2270                     hw->cipher_schemes->cipher == key->cipher)
2271                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2272                 else
2273                         return -EOPNOTSUPP;
2274         }
2275
2276         mutex_lock(&mvm->mutex);
2277
2278         switch (cmd) {
2279         case SET_KEY:
2280                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2281                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2282                         /*
2283                          * GTK on AP interface is a TX-only key, return 0;
2284                          * on IBSS they're per-station and because we're lazy
2285                          * we don't support them for RX, so do the same.
2286                          */
2287                         ret = 0;
2288                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2289                         break;
2290                 }
2291
2292                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2293                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2294                 if (ret) {
2295                         IWL_WARN(mvm, "set key failed\n");
2296                         /*
2297                          * can't add key for RX, but we don't need it
2298                          * in the device for TX so still return 0
2299                          */
2300                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2301                         ret = 0;
2302                 }
2303
2304                 break;
2305         case DISABLE_KEY:
2306                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2307                         ret = 0;
2308                         break;
2309                 }
2310
2311                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2312                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2313                 break;
2314         default:
2315                 ret = -EINVAL;
2316         }
2317
2318         mutex_unlock(&mvm->mutex);
2319         return ret;
2320 }
2321
2322 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2323                                         struct ieee80211_vif *vif,
2324                                         struct ieee80211_key_conf *keyconf,
2325                                         struct ieee80211_sta *sta,
2326                                         u32 iv32, u16 *phase1key)
2327 {
2328         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2329
2330         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2331                 return;
2332
2333         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2334 }
2335
2336
2337 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2338                                struct iwl_rx_packet *pkt, void *data)
2339 {
2340         struct iwl_mvm *mvm =
2341                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2342         struct iwl_hs20_roc_res *resp;
2343         int resp_len = iwl_rx_packet_payload_len(pkt);
2344         struct iwl_mvm_time_event_data *te_data = data;
2345
2346         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2347                 return true;
2348
2349         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2350                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2351                 return true;
2352         }
2353
2354         resp = (void *)pkt->data;
2355
2356         IWL_DEBUG_TE(mvm,
2357                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2358                      resp->status, resp->event_unique_id);
2359
2360         te_data->uid = le32_to_cpu(resp->event_unique_id);
2361         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2362                      te_data->uid);
2363
2364         spin_lock_bh(&mvm->time_event_lock);
2365         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2366         spin_unlock_bh(&mvm->time_event_lock);
2367
2368         return true;
2369 }
2370
2371 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2372 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2373                                     struct ieee80211_channel *channel,
2374                                     struct ieee80211_vif *vif,
2375                                     int duration)
2376 {
2377         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2378         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2379         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2380         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2381         struct iwl_notification_wait wait_time_event;
2382         struct iwl_hs20_roc_req aux_roc_req = {
2383                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2384                 .id_and_color =
2385                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2386                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2387                 /* Set the channel info data */
2388                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2389                         PHY_BAND_24 : PHY_BAND_5,
2390                 .channel_info.channel = channel->hw_value,
2391                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2392                 /* Set the time and duration */
2393                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2394                 .apply_time_max_delay =
2395                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2396                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2397          };
2398
2399         /* Set the node address */
2400         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2401
2402         te_data->vif = vif;
2403         te_data->duration = duration;
2404         te_data->id = HOT_SPOT_CMD;
2405
2406         lockdep_assert_held(&mvm->mutex);
2407
2408         spin_lock_bh(&mvm->time_event_lock);
2409         list_add_tail(&te_data->list, &mvm->time_event_list);
2410         spin_unlock_bh(&mvm->time_event_lock);
2411
2412         /*
2413          * Use a notification wait, which really just processes the
2414          * command response and doesn't wait for anything, in order
2415          * to be able to process the response and get the UID inside
2416          * the RX path. Using CMD_WANT_SKB doesn't work because it
2417          * stores the buffer and then wakes up this thread, by which
2418          * time another notification (that the time event started)
2419          * might already be processed unsuccessfully.
2420          */
2421         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2422                                    time_event_response,
2423                                    ARRAY_SIZE(time_event_response),
2424                                    iwl_mvm_rx_aux_roc, te_data);
2425
2426         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2427                                    &aux_roc_req);
2428
2429         if (res) {
2430                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2431                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2432                 goto out_clear_te;
2433         }
2434
2435         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2436         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2437         /* should never fail */
2438         WARN_ON_ONCE(res);
2439
2440         if (res) {
2441  out_clear_te:
2442                 spin_lock_bh(&mvm->time_event_lock);
2443                 iwl_mvm_te_clear_data(mvm, te_data);
2444                 spin_unlock_bh(&mvm->time_event_lock);
2445         }
2446
2447         return res;
2448 }
2449
2450 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2451                        struct ieee80211_vif *vif,
2452                        struct ieee80211_channel *channel,
2453                        int duration,
2454                        enum ieee80211_roc_type type)
2455 {
2456         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2457         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2458         struct cfg80211_chan_def chandef;
2459         struct iwl_mvm_phy_ctxt *phy_ctxt;
2460         int ret, i;
2461
2462         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2463                            duration, type);
2464
2465         switch (vif->type) {
2466         case NL80211_IFTYPE_STATION:
2467                 /* Use aux roc framework (HS20) */
2468                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2469                                                vif, duration);
2470                 return ret;
2471         case NL80211_IFTYPE_P2P_DEVICE:
2472                 /* handle below */
2473                 break;
2474         default:
2475                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2476                 return -EINVAL;
2477         }
2478
2479         mutex_lock(&mvm->mutex);
2480
2481         for (i = 0; i < NUM_PHY_CTX; i++) {
2482                 phy_ctxt = &mvm->phy_ctxts[i];
2483                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2484                         continue;
2485
2486                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2487                         /*
2488                          * Unbind the P2P_DEVICE from the current PHY context,
2489                          * and if the PHY context is not used remove it.
2490                          */
2491                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2492                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2493                                 goto out_unlock;
2494
2495                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2496
2497                         /* Bind the P2P_DEVICE to the current PHY Context */
2498                         mvmvif->phy_ctxt = phy_ctxt;
2499
2500                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2501                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2502                                 goto out_unlock;
2503
2504                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2505                         goto schedule_time_event;
2506                 }
2507         }
2508
2509         /* Need to update the PHY context only if the ROC channel changed */
2510         if (channel == mvmvif->phy_ctxt->channel)
2511                 goto schedule_time_event;
2512
2513         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2514
2515         /*
2516          * Change the PHY context configuration as it is currently referenced
2517          * only by the P2P Device MAC
2518          */
2519         if (mvmvif->phy_ctxt->ref == 1) {
2520                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2521                                                &chandef, 1, 1);
2522                 if (ret)
2523                         goto out_unlock;
2524         } else {
2525                 /*
2526                  * The PHY context is shared with other MACs. Need to remove the
2527                  * P2P Device from the binding, allocate an new PHY context and
2528                  * create a new binding
2529                  */
2530                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2531                 if (!phy_ctxt) {
2532                         ret = -ENOSPC;
2533                         goto out_unlock;
2534                 }
2535
2536                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2537                                                1, 1);
2538                 if (ret) {
2539                         IWL_ERR(mvm, "Failed to change PHY context\n");
2540                         goto out_unlock;
2541                 }
2542
2543                 /* Unbind the P2P_DEVICE from the current PHY context */
2544                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2545                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2546                         goto out_unlock;
2547
2548                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2549
2550                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2551                 mvmvif->phy_ctxt = phy_ctxt;
2552
2553                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2554                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2555                         goto out_unlock;
2556
2557                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2558         }
2559
2560 schedule_time_event:
2561         /* Schedule the time events */
2562         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2563
2564 out_unlock:
2565         mutex_unlock(&mvm->mutex);
2566         IWL_DEBUG_MAC80211(mvm, "leave\n");
2567         return ret;
2568 }
2569
2570 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2571 {
2572         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2573
2574         IWL_DEBUG_MAC80211(mvm, "enter\n");
2575
2576         mutex_lock(&mvm->mutex);
2577         iwl_mvm_stop_p2p_roc(mvm);
2578         mutex_unlock(&mvm->mutex);
2579
2580         IWL_DEBUG_MAC80211(mvm, "leave\n");
2581         return 0;
2582 }
2583
2584 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2585                                  struct ieee80211_chanctx_conf *ctx)
2586 {
2587         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2588         struct iwl_mvm_phy_ctxt *phy_ctxt;
2589         int ret;
2590
2591         lockdep_assert_held(&mvm->mutex);
2592
2593         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2594
2595         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2596         if (!phy_ctxt) {
2597                 ret = -ENOSPC;
2598                 goto out;
2599         }
2600
2601         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2602                                        ctx->rx_chains_static,
2603                                        ctx->rx_chains_dynamic);
2604         if (ret) {
2605                 IWL_ERR(mvm, "Failed to add PHY context\n");
2606                 goto out;
2607         }
2608
2609         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2610         *phy_ctxt_id = phy_ctxt->id;
2611 out:
2612         return ret;
2613 }
2614
2615 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2616                                struct ieee80211_chanctx_conf *ctx)
2617 {
2618         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2619         int ret;
2620
2621         mutex_lock(&mvm->mutex);
2622         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2623         mutex_unlock(&mvm->mutex);
2624
2625         return ret;
2626 }
2627
2628 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2629                                      struct ieee80211_chanctx_conf *ctx)
2630 {
2631         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2632         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2633
2634         lockdep_assert_held(&mvm->mutex);
2635
2636         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2637 }
2638
2639 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2640                                    struct ieee80211_chanctx_conf *ctx)
2641 {
2642         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2643
2644         mutex_lock(&mvm->mutex);
2645         __iwl_mvm_remove_chanctx(mvm, ctx);
2646         mutex_unlock(&mvm->mutex);
2647 }
2648
2649 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2650                                    struct ieee80211_chanctx_conf *ctx,
2651                                    u32 changed)
2652 {
2653         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2654         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2655         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2656
2657         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2658                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2659                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2660                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2661                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2662                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2663                       phy_ctxt->ref, changed))
2664                 return;
2665
2666         mutex_lock(&mvm->mutex);
2667         iwl_mvm_bt_coex_vif_change(mvm);
2668         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2669                                  ctx->rx_chains_static,
2670                                  ctx->rx_chains_dynamic);
2671         mutex_unlock(&mvm->mutex);
2672 }
2673
2674 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2675                                         struct ieee80211_vif *vif,
2676                                         struct ieee80211_chanctx_conf *ctx,
2677                                         bool switching_chanctx)
2678 {
2679         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2680         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2681         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2682         int ret;
2683
2684         lockdep_assert_held(&mvm->mutex);
2685
2686         mvmvif->phy_ctxt = phy_ctxt;
2687
2688         switch (vif->type) {
2689         case NL80211_IFTYPE_AP:
2690                 /* Unless it's a CSA flow we have nothing to do here */
2691                 if (vif->csa_active) {
2692                         mvmvif->ap_ibss_active = true;
2693                         break;
2694                 }
2695         case NL80211_IFTYPE_ADHOC:
2696                 /*
2697                  * The AP binding flow is handled as part of the start_ap flow
2698                  * (in bss_info_changed), similarly for IBSS.
2699                  */
2700                 ret = 0;
2701                 goto out;
2702         case NL80211_IFTYPE_STATION:
2703         case NL80211_IFTYPE_MONITOR:
2704                 break;
2705         default:
2706                 ret = -EINVAL;
2707                 goto out;
2708         }
2709
2710         ret = iwl_mvm_binding_add_vif(mvm, vif);
2711         if (ret)
2712                 goto out;
2713
2714         /*
2715          * Power state must be updated before quotas,
2716          * otherwise fw will complain.
2717          */
2718         iwl_mvm_power_update_mac(mvm);
2719
2720         /* Setting the quota at this stage is only required for monitor
2721          * interfaces. For the other types, the bss_info changed flow
2722          * will handle quota settings.
2723          */
2724         if (vif->type == NL80211_IFTYPE_MONITOR) {
2725                 mvmvif->monitor_active = true;
2726                 ret = iwl_mvm_update_quotas(mvm, NULL);
2727                 if (ret)
2728                         goto out_remove_binding;
2729         }
2730
2731         /* Handle binding during CSA */
2732         if ((vif->type == NL80211_IFTYPE_AP) ||
2733             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2734                 iwl_mvm_update_quotas(mvm, NULL);
2735                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2736         }
2737
2738         goto out;
2739
2740 out_remove_binding:
2741         iwl_mvm_binding_remove_vif(mvm, vif);
2742         iwl_mvm_power_update_mac(mvm);
2743 out:
2744         if (ret)
2745                 mvmvif->phy_ctxt = NULL;
2746         return ret;
2747 }
2748 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2749                                       struct ieee80211_vif *vif,
2750                                       struct ieee80211_chanctx_conf *ctx)
2751 {
2752         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2753         int ret;
2754
2755         mutex_lock(&mvm->mutex);
2756         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2757         mutex_unlock(&mvm->mutex);
2758
2759         return ret;
2760 }
2761
2762 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2763                                            struct ieee80211_vif *vif,
2764                                            struct ieee80211_chanctx_conf *ctx,
2765                                            bool switching_chanctx)
2766 {
2767         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2768         struct ieee80211_vif *disabled_vif = NULL;
2769
2770         lockdep_assert_held(&mvm->mutex);
2771
2772         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2773
2774         switch (vif->type) {
2775         case NL80211_IFTYPE_ADHOC:
2776                 goto out;
2777         case NL80211_IFTYPE_MONITOR:
2778                 mvmvif->monitor_active = false;
2779                 break;
2780         case NL80211_IFTYPE_AP:
2781                 /* This part is triggered only during CSA */
2782                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2783                         goto out;
2784
2785                 /* Set CS bit on all the stations */
2786                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2787
2788                 /* Save blocked iface, the timeout is set on the next beacon */
2789                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2790
2791                 mvmvif->ap_ibss_active = false;
2792                 break;
2793         case NL80211_IFTYPE_STATION:
2794                 if (!switching_chanctx)
2795                         break;
2796
2797                 disabled_vif = vif;
2798
2799                 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2800                 break;
2801         default:
2802                 break;
2803         }
2804
2805         iwl_mvm_update_quotas(mvm, disabled_vif);
2806         iwl_mvm_binding_remove_vif(mvm, vif);
2807
2808 out:
2809         mvmvif->phy_ctxt = NULL;
2810         iwl_mvm_power_update_mac(mvm);
2811 }
2812
2813 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2814                                          struct ieee80211_vif *vif,
2815                                          struct ieee80211_chanctx_conf *ctx)
2816 {
2817         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2818
2819         mutex_lock(&mvm->mutex);
2820         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2821         mutex_unlock(&mvm->mutex);
2822 }
2823
2824 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2825                                       struct ieee80211_vif_chanctx_switch *vifs,
2826                                       int n_vifs,
2827                                       enum ieee80211_chanctx_switch_mode mode)
2828 {
2829         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2830         int ret;
2831
2832         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2833         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2834                 return -EOPNOTSUPP;
2835
2836         mutex_lock(&mvm->mutex);
2837         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2838         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2839
2840         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2841         if (ret) {
2842                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2843                 goto out_reassign;
2844         }
2845
2846         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2847                                            true);
2848         if (ret) {
2849                 IWL_ERR(mvm,
2850                         "failed to assign new_ctx during channel switch\n");
2851                 goto out_remove;
2852         }
2853
2854         /* we don't support TDLS during DCM - can be caused by channel switch */
2855         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2856                 iwl_mvm_teardown_tdls_peers(mvm);
2857
2858         goto out;
2859
2860 out_remove:
2861         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2862
2863 out_reassign:
2864         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2865         if (ret) {
2866                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2867                 goto out_restart;
2868         }
2869
2870         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2871                                            true);
2872         if (ret) {
2873                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2874                 goto out_restart;
2875         }
2876
2877         goto out;
2878
2879 out_restart:
2880         /* things keep failing, better restart the hw */
2881         iwl_mvm_nic_restart(mvm, false);
2882
2883 out:
2884         mutex_unlock(&mvm->mutex);
2885         return ret;
2886 }
2887
2888 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2889                            struct ieee80211_sta *sta,
2890                            bool set)
2891 {
2892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2893         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2894
2895         if (!mvm_sta || !mvm_sta->vif) {
2896                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2897                 return -EINVAL;
2898         }
2899
2900         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2901 }
2902
2903 #ifdef CONFIG_NL80211_TESTMODE
2904 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2905         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2906         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2907         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2908 };
2909
2910 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2911                                       struct ieee80211_vif *vif,
2912                                       void *data, int len)
2913 {
2914         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2915         int err;
2916         u32 noa_duration;
2917
2918         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2919         if (err)
2920                 return err;
2921
2922         if (!tb[IWL_MVM_TM_ATTR_CMD])
2923                 return -EINVAL;
2924
2925         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2926         case IWL_MVM_TM_CMD_SET_NOA:
2927                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2928                     !vif->bss_conf.enable_beacon ||
2929                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2930                         return -EINVAL;
2931
2932                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2933                 if (noa_duration >= vif->bss_conf.beacon_int)
2934                         return -EINVAL;
2935
2936                 mvm->noa_duration = noa_duration;
2937                 mvm->noa_vif = vif;
2938
2939                 return iwl_mvm_update_quotas(mvm, NULL);
2940         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2941                 /* must be associated client vif - ignore authorized */
2942                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2943                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2944                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2945                         return -EINVAL;
2946
2947                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2948                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2949                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2950         }
2951
2952         return -EOPNOTSUPP;
2953 }
2954
2955 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2956                                     struct ieee80211_vif *vif,
2957                                     void *data, int len)
2958 {
2959         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2960         int err;
2961
2962         mutex_lock(&mvm->mutex);
2963         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2964         mutex_unlock(&mvm->mutex);
2965
2966         return err;
2967 }
2968 #endif
2969
2970 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2971                                           struct ieee80211_vif *vif,
2972                                           struct cfg80211_chan_def *chandef)
2973 {
2974         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2975         struct ieee80211_vif *csa_vif;
2976
2977         mutex_lock(&mvm->mutex);
2978
2979         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2980                                             lockdep_is_held(&mvm->mutex));
2981         if (WARN(csa_vif && csa_vif->csa_active,
2982                  "Another CSA is already in progress"))
2983                 goto out_unlock;
2984
2985         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2986                            chandef->center_freq1);
2987         rcu_assign_pointer(mvm->csa_vif, vif);
2988
2989 out_unlock:
2990         mutex_unlock(&mvm->mutex);
2991 }
2992
2993 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2994                               struct ieee80211_vif *vif, u32 queues, bool drop)
2995 {
2996         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2997         struct iwl_mvm_vif *mvmvif;
2998         struct iwl_mvm_sta *mvmsta;
2999
3000         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3001                 return;
3002
3003         mutex_lock(&mvm->mutex);
3004         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3005         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3006
3007         if (WARN_ON_ONCE(!mvmsta))
3008                 goto done;
3009
3010         if (drop) {
3011                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3012                         IWL_ERR(mvm, "flush request fail\n");
3013         } else {
3014                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3015                                               mvmsta->tfd_queue_msk);
3016         }
3017 done:
3018         mutex_unlock(&mvm->mutex);
3019 }
3020
3021 const struct ieee80211_ops iwl_mvm_hw_ops = {
3022         .tx = iwl_mvm_mac_tx,
3023         .ampdu_action = iwl_mvm_mac_ampdu_action,
3024         .start = iwl_mvm_mac_start,
3025         .restart_complete = iwl_mvm_mac_restart_complete,
3026         .stop = iwl_mvm_mac_stop,
3027         .add_interface = iwl_mvm_mac_add_interface,
3028         .remove_interface = iwl_mvm_mac_remove_interface,
3029         .config = iwl_mvm_mac_config,
3030         .prepare_multicast = iwl_mvm_prepare_multicast,
3031         .configure_filter = iwl_mvm_configure_filter,
3032         .bss_info_changed = iwl_mvm_bss_info_changed,
3033         .hw_scan = iwl_mvm_mac_hw_scan,
3034         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3035         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3036         .sta_state = iwl_mvm_mac_sta_state,
3037         .sta_notify = iwl_mvm_mac_sta_notify,
3038         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3039         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3040         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3041         .sta_rc_update = iwl_mvm_sta_rc_update,
3042         .conf_tx = iwl_mvm_mac_conf_tx,
3043         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3044         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3045         .flush = iwl_mvm_mac_flush,
3046         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3047         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3048         .set_key = iwl_mvm_mac_set_key,
3049         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3050         .remain_on_channel = iwl_mvm_roc,
3051         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3052         .add_chanctx = iwl_mvm_add_chanctx,
3053         .remove_chanctx = iwl_mvm_remove_chanctx,
3054         .change_chanctx = iwl_mvm_change_chanctx,
3055         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3056         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3057         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3058
3059         .start_ap = iwl_mvm_start_ap_ibss,
3060         .stop_ap = iwl_mvm_stop_ap_ibss,
3061         .join_ibss = iwl_mvm_start_ap_ibss,
3062         .leave_ibss = iwl_mvm_stop_ap_ibss,
3063
3064         .set_tim = iwl_mvm_set_tim,
3065
3066         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3067
3068         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3069
3070 #ifdef CONFIG_PM_SLEEP
3071         /* look at d3.c */
3072         .suspend = iwl_mvm_suspend,
3073         .resume = iwl_mvm_resume,
3074         .set_wakeup = iwl_mvm_set_wakeup,
3075         .set_rekey_data = iwl_mvm_set_rekey_data,
3076 #if IS_ENABLED(CONFIG_IPV6)
3077         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3078 #endif
3079         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3080 #endif
3081 };