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  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <net/mac80211.h>
  73 #include <net/ieee80211_radiotap.h>
  74 #include <net/tcp.h>
  75
  76 #include "iwl-op-mode.h"
  77 #include "iwl-io.h"
  78 #include "mvm.h"
  79 #include "sta.h"
  80 #include "time-event.h"
  81 #include "iwl-eeprom-parse.h"
  82 #include "fw-api-scan.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87
  88 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  89         {
  90                 .max = 1,
  91                 .types = BIT(NL80211_IFTYPE_STATION),
  92         },
  93         {
  94                 .max = 1,
  95                 .types = BIT(NL80211_IFTYPE_AP) |
  96                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  97                         BIT(NL80211_IFTYPE_P2P_GO),
  98         },
  99         {
 100                 .max = 1,
 101                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 102         },
 103 };
 104
 105 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 106         {
 107                 .num_different_channels = 1,
 108                 .max_interfaces = 3,
 109                 .limits = iwl_mvm_limits,
 110                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 111         },
 112 };
 113
 114 #ifdef CONFIG_PM_SLEEP
 115 static const struct nl80211_wowlan_tcp_data_token_feature
 116 iwl_mvm_wowlan_tcp_token_feature = {
 117         .min_len = 0,
 118         .max_len = 255,
 119         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 120 };
 121
 122 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 123         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 124         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 125                             sizeof(struct ethhdr) -
 126                             sizeof(struct iphdr) -
 127                             sizeof(struct tcphdr),
 128         .data_interval_max = 65535, /* __le16 in API */
 129         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 130                             sizeof(struct ethhdr) -
 131                             sizeof(struct iphdr) -
 132                             sizeof(struct tcphdr),
 133         .seq = true,
 134 };
 135 #endif
 136
 137 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 138 /*
 139  * Use the reserved field to indicate magic values.
 140  * these values will only be used internally by the driver,
 141  * and won't make it to the fw (reserved will be 0).
 142  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 143  *      be the vif's ip address. in case there is not a single
 144  *      ip address (0, or more than 1), this attribute will
 145  *      be skipped.
 146  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 147  *      the LSB bytes of the vif's mac address
 148  */
 149 enum {
 150         BC_FILTER_MAGIC_NONE = 0,
 151         BC_FILTER_MAGIC_IP,
 152         BC_FILTER_MAGIC_MAC,
 153 };
 154
 155 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 156         {
 157                 /* arp */
 158                 .discard = 0,
 159                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 160                 .attrs = {
 161                         {
 162                                 /* frame type - arp, hw type - ethernet */
 163                                 .offset_type =
 164                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 165                                 .offset = sizeof(rfc1042_header),
 166                                 .val = cpu_to_be32(0x08060001),
 167                                 .mask = cpu_to_be32(0xffffffff),
 168                         },
 169                         {
 170                                 /* arp dest ip */
 171                                 .offset_type =
 172                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 173                                 .offset = sizeof(rfc1042_header) + 2 +
 174                                           sizeof(struct arphdr) +
 175                                           ETH_ALEN + sizeof(__be32) +
 176                                           ETH_ALEN,
 177                                 .mask = cpu_to_be32(0xffffffff),
 178                                 /* mark it as special field */
 179                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 180                         },
 181                 },
 182         },
 183         {
 184                 /* dhcp offer bcast */
 185                 .discard = 0,
 186                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 187                 .attrs = {
 188                         {
 189                                 /* udp dest port - 68 (bootp client)*/
 190                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 191                                 .offset = offsetof(struct udphdr, dest),
 192                                 .val = cpu_to_be32(0x00440000),
 193                                 .mask = cpu_to_be32(0xffff0000),
 194                         },
 195                         {
 196                                 /* dhcp - lsb bytes of client hw address */
 197                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 198                                 .offset = 38,
 199                                 .mask = cpu_to_be32(0xffffffff),
 200                                 /* mark it as special field */
 201                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 202                         },
 203                 },
 204         },
 205         /* last filter must be empty */
 206         {},
 207 };
 208 #endif
 209
 210 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 211 {
 212         if (!iwl_mvm_is_d0i3_supported(mvm))
 213                 return;
 214
 215         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 216         spin_lock_bh(&mvm->refs_lock);
 217         mvm->refs[ref_type]++;
 218         spin_unlock_bh(&mvm->refs_lock);
 219         iwl_trans_ref(mvm->trans);
 220 }
 221
 222 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 223 {
 224         if (!iwl_mvm_is_d0i3_supported(mvm))
 225                 return;
 226
 227         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 228         spin_lock_bh(&mvm->refs_lock);
 229         WARN_ON(!mvm->refs[ref_type]--);
 230         spin_unlock_bh(&mvm->refs_lock);
 231         iwl_trans_unref(mvm->trans);
 232 }
 233
 234 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 235                                      enum iwl_mvm_ref_type except_ref)
 236 {
 237         int i, j;
 238
 239         if (!iwl_mvm_is_d0i3_supported(mvm))
 240                 return;
 241
 242         spin_lock_bh(&mvm->refs_lock);
 243         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 244                 if (except_ref == i || !mvm->refs[i])
 245                         continue;
 246
 247                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 248                               i, mvm->refs[i]);
 249                 for (j = 0; j < mvm->refs[i]; j++)
 250                         iwl_trans_unref(mvm->trans);
 251                 mvm->refs[i] = 0;
 252         }
 253         spin_unlock_bh(&mvm->refs_lock);
 254 }
 255
 256 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 257 {
 258         iwl_mvm_ref(mvm, ref_type);
 259
 260         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 261                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 262                                 HZ)) {
 263                 WARN_ON_ONCE(1);
 264                 iwl_mvm_unref(mvm, ref_type);
 265                 return -EIO;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 272 {
 273         int i;
 274
 275         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 276         for (i = 0; i < NUM_PHY_CTX; i++) {
 277                 mvm->phy_ctxts[i].id = i;
 278                 mvm->phy_ctxts[i].ref = 0;
 279         }
 280 }
 281
 282 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 283 {
 284         /* we create the 802.11 header and SSID element */
 285         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 286                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 287         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 288 }
 289
 290 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 291 {
 292         struct ieee80211_hw *hw = mvm->hw;
 293         int num_mac, ret, i;
 294
 295         /* Tell mac80211 our characteristics */
 296         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 297                     IEEE80211_HW_SPECTRUM_MGMT |
 298                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 299                     IEEE80211_HW_QUEUE_CONTROL |
 300                     IEEE80211_HW_WANT_MONITOR_VIF |
 301                     IEEE80211_HW_SUPPORTS_PS |
 302                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 303                     IEEE80211_HW_AMPDU_AGGREGATION |
 304                     IEEE80211_HW_TIMING_BEACON_ONLY |
 305                     IEEE80211_HW_CONNECTION_MONITOR |
 306                     IEEE80211_HW_CHANCTX_STA_CSA |
 307                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 308                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 309
 310         hw->queues = mvm->first_agg_queue;
 311         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 312         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 313                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 314         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 315         hw->rate_control_algorithm = "iwl-mvm-rs";
 316
 317         /*
 318          * Enable 11w if advertised by firmware and software crypto
 319          * is not enabled (as the firmware will interpret some mgmt
 320          * packets, so enabling it with software crypto isn't safe)
 321          */
 322         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 323             !iwlwifi_mod_params.sw_crypto)
 324                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 325
 326         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 327             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 328             !iwlwifi_mod_params.uapsd_disable) {
 329                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 330                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 331                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 332         }
 333
 334         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 335                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 336
 337         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 338         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 339         hw->chanctx_data_size = sizeof(u16);
 340
 341         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 342                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 343                 BIT(NL80211_IFTYPE_AP) |
 344                 BIT(NL80211_IFTYPE_P2P_GO) |
 345                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 346                 BIT(NL80211_IFTYPE_ADHOC);
 347
 348         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 349         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 350                                        REGULATORY_DISABLE_BEACON_HINTS;
 351
 352         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 353                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 354
 355         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 356                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 357
 358         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 359         hw->wiphy->n_iface_combinations =
 360                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 361
 362         hw->wiphy->max_remain_on_channel_duration = 10000;
 363         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 364
 365         /* Extract MAC address */
 366         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 367         hw->wiphy->addresses = mvm->addresses;
 368         hw->wiphy->n_addresses = 1;
 369
 370         /* Extract additional MAC addresses if available */
 371         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 372                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 373
 374         for (i = 1; i < num_mac; i++) {
 375                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 376                        ETH_ALEN);
 377                 mvm->addresses[i].addr[5]++;
 378                 hw->wiphy->n_addresses++;
 379         }
 380
 381         iwl_mvm_reset_phy_ctxts(mvm);
 382
 383         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 384
 385         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 386
 387         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 388                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 389                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 390         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 391                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 392                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 393
 394         hw->wiphy->hw_version = mvm->trans->hw_id;
 395
 396         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 397                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 398         else
 399                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 400
 401         /* TODO: enable that only for firmwares that don't crash */
 402         /* hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; */
 403         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 404         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 405         /* we create the 802.11 header and zero length SSID IE. */
 406         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 407
 408         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 409                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 410                                NL80211_FEATURE_P2P_GO_OPPPS;
 411
 412         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 413
 414         /* currently FW API supports only one optional cipher scheme */
 415         if (mvm->fw->cs[0].cipher) {
 416                 mvm->hw->n_cipher_schemes = 1;
 417                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 418         }
 419
 420 #ifdef CONFIG_PM_SLEEP
 421         if (iwl_mvm_is_d0i3_supported(mvm) &&
 422             device_can_wakeup(mvm->trans->dev)) {
 423                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 424                 hw->wiphy->wowlan = &mvm->wowlan;
 425         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 426             mvm->trans->ops->d3_suspend &&
 427             mvm->trans->ops->d3_resume &&
 428             device_can_wakeup(mvm->trans->dev)) {
 429                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 430                                     WIPHY_WOWLAN_DISCONNECT |
 431                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 432                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 433                 if (!iwlwifi_mod_params.sw_crypto)
 434                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 435                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 436                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 437
 438                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 439                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 440                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 441                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 442                 hw->wiphy->wowlan = &mvm->wowlan;
 443         }
 444 #endif
 445
 446 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 447         /* assign default bcast filtering configuration */
 448         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 449 #endif
 450
 451         ret = iwl_mvm_leds_init(mvm);
 452         if (ret)
 453                 return ret;
 454
 455         ret = ieee80211_register_hw(mvm->hw);
 456         if (ret)
 457                 iwl_mvm_leds_exit(mvm);
 458
 459         return ret;
 460 }
 461
 462 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 463                              struct ieee80211_sta *sta,
 464                              struct sk_buff *skb)
 465 {
 466         struct iwl_mvm_sta *mvmsta;
 467         bool defer = false;
 468
 469         /*
 470          * double check the IN_D0I3 flag both before and after
 471          * taking the spinlock, in order to prevent taking
 472          * the spinlock when not needed.
 473          */
 474         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 475                 return false;
 476
 477         spin_lock(&mvm->d0i3_tx_lock);
 478         /*
 479          * testing the flag again ensures the skb dequeue
 480          * loop (on d0i3 exit) hasn't run yet.
 481          */
 482         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 483                 goto out;
 484
 485         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 486         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 487             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 488                 goto out;
 489
 490         __skb_queue_tail(&mvm->d0i3_tx, skb);
 491         ieee80211_stop_queues(mvm->hw);
 492
 493         /* trigger wakeup */
 494         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 495         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 496
 497         defer = true;
 498 out:
 499         spin_unlock(&mvm->d0i3_tx_lock);
 500         return defer;
 501 }
 502
 503 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 504                            struct ieee80211_tx_control *control,
 505                            struct sk_buff *skb)
 506 {
 507         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 508         struct ieee80211_sta *sta = control->sta;
 509         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 510         struct ieee80211_hdr *hdr = (void *)skb->data;
 511
 512         if (iwl_mvm_is_radio_killed(mvm)) {
 513                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 514                 goto drop;
 515         }
 516
 517         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 518             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 519                 goto drop;
 520
 521         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 522         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 523                      ieee80211_is_mgmt(hdr->frame_control) &&
 524                      !ieee80211_is_deauth(hdr->frame_control) &&
 525                      !ieee80211_is_disassoc(hdr->frame_control) &&
 526                      !ieee80211_is_action(hdr->frame_control)))
 527                 sta = NULL;
 528
 529         if (sta) {
 530                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 531                         return;
 532                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 533                         goto drop;
 534                 return;
 535         }
 536
 537         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 538                 goto drop;
 539         return;
 540  drop:
 541         ieee80211_free_txskb(hw, skb);
 542 }
 543
 544 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 545 {
 546         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 547                 return false;
 548         return true;
 549 }
 550
 551 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 552 {
 553         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 554                 return false;
 555         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 556                 return true;
 557
 558         /* enabled by default */
 559         return true;
 560 }
 561
 562 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 563                                     struct ieee80211_vif *vif,
 564                                     enum ieee80211_ampdu_mlme_action action,
 565                                     struct ieee80211_sta *sta, u16 tid,
 566                                     u16 *ssn, u8 buf_size)
 567 {
 568         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 569         int ret;
 570         bool tx_agg_ref = false;
 571
 572         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 573                      sta->addr, tid, action);
 574
 575         if (!(mvm->nvm_data->sku_cap_11n_enable))
 576                 return -EACCES;
 577
 578         /* return from D0i3 before starting a new Tx aggregation */
 579         switch (action) {
 580         case IEEE80211_AMPDU_TX_START:
 581         case IEEE80211_AMPDU_TX_STOP_CONT:
 582         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 583         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 584         case IEEE80211_AMPDU_TX_OPERATIONAL:
 585                 /*
 586                  * for tx start, wait synchronously until D0i3 exit to
 587                  * get the correct sequence number for the tid.
 588                  * additionally, some other ampdu actions use direct
 589                  * target access, which is not handled automatically
 590                  * by the trans layer (unlike commands), so wait for
 591                  * d0i3 exit in these cases as well.
 592                  */
 593                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 594                 if (ret)
 595                         return ret;
 596
 597                 tx_agg_ref = true;
 598                 break;
 599         default:
 600                 break;
 601         }
 602
 603         mutex_lock(&mvm->mutex);
 604
 605         switch (action) {
 606         case IEEE80211_AMPDU_RX_START:
 607                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 608                         ret = -EINVAL;
 609                         break;
 610                 }
 611                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 612                 break;
 613         case IEEE80211_AMPDU_RX_STOP:
 614                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 615                 break;
 616         case IEEE80211_AMPDU_TX_START:
 617                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 618                         ret = -EINVAL;
 619                         break;
 620                 }
 621                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 622                 break;
 623         case IEEE80211_AMPDU_TX_STOP_CONT:
 624                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 625                 break;
 626         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 627         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 628                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 629                 break;
 630         case IEEE80211_AMPDU_TX_OPERATIONAL:
 631                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 632                 break;
 633         default:
 634                 WARN_ON_ONCE(1);
 635                 ret = -EINVAL;
 636                 break;
 637         }
 638         mutex_unlock(&mvm->mutex);
 639
 640         /*
 641          * If the tid is marked as started, we won't use it for offloaded
 642          * traffic on the next D0i3 entry. It's safe to unref.
 643          */
 644         if (tx_agg_ref)
 645                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 646
 647         return ret;
 648 }
 649
 650 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 651                                      struct ieee80211_vif *vif)
 652 {
 653         struct iwl_mvm *mvm = data;
 654         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 655
 656         mvmvif->uploaded = false;
 657         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 658
 659         /* does this make sense at all? */
 660         mvmvif->color++;
 661
 662         spin_lock_bh(&mvm->time_event_lock);
 663         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 664         spin_unlock_bh(&mvm->time_event_lock);
 665
 666         mvmvif->phy_ctxt = NULL;
 667         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 668 }
 669
 670 #ifdef CONFIG_IWLWIFI_DEBUGFS
 671 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 672 {
 673         struct iwl_fw_error_dump_file *dump_file;
 674         struct iwl_fw_error_dump_data *dump_data;
 675         struct iwl_fw_error_dump_info *dump_info;
 676         struct iwl_mvm_dump_ptrs *fw_error_dump;
 677         const struct fw_img *img;
 678         u32 sram_len, sram_ofs;
 679         u32 file_len, rxf_len;
 680         unsigned long flags;
 681         int reg_val;
 682
 683         lockdep_assert_held(&mvm->mutex);
 684
 685         if (mvm->fw_error_dump)
 686                 return;
 687
 688         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 689         if (!fw_error_dump)
 690                 return;
 691
 692         img = &mvm->fw->img[mvm->cur_ucode];
 693         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 694         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 695
 696         /* reading buffer size */
 697         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 698         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 699
 700         /* the register holds the value divided by 128 */
 701         rxf_len = rxf_len << 7;
 702
 703         file_len = sizeof(*dump_file) +
 704                    sizeof(*dump_data) * 3 +
 705                    sram_len +
 706                    rxf_len +
 707                    sizeof(*dump_info);
 708
 709         dump_file = vzalloc(file_len);
 710         if (!dump_file) {
 711                 kfree(fw_error_dump);
 712                 return;
 713         }
 714
 715         fw_error_dump->op_mode_ptr = dump_file;
 716
 717         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 718         dump_data = (void *)dump_file->data;
 719
 720         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 721         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 722         dump_info = (void *) dump_data->data;
 723         dump_info->device_family =
 724                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 725                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 726                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 727         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 728                sizeof(dump_info->fw_human_readable));
 729         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 730                 sizeof(dump_info->dev_human_readable));
 731         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 732                 sizeof(dump_info->bus_human_readable));
 733
 734         dump_data = iwl_fw_error_next_data(dump_data);
 735         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 736         dump_data->len = cpu_to_le32(rxf_len);
 737
 738         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 739                 u32 *rxf = (void *)dump_data->data;
 740                 int i;
 741
 742                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 743                         iwl_trans_write_prph(mvm->trans,
 744                                              RXF_LD_FENCE_OFFSET_ADDR,
 745                                              i * sizeof(u32));
 746                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 747                                                      RXF_FIFO_RD_FENCE_ADDR);
 748                 }
 749                 iwl_trans_release_nic_access(mvm->trans, &flags);
 750         }
 751
 752         dump_data = iwl_fw_error_next_data(dump_data);
 753         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 754         dump_data->len = cpu_to_le32(sram_len);
 755         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 756                                  sram_len);
 757
 758         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 759         fw_error_dump->op_mode_len = file_len;
 760         if (fw_error_dump->trans_ptr)
 761                 file_len += fw_error_dump->trans_ptr->len;
 762         dump_file->file_len = cpu_to_le32(file_len);
 763         mvm->fw_error_dump = fw_error_dump;
 764 }
 765 #endif
 766
 767 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 768 {
 769 #ifdef CONFIG_IWLWIFI_DEBUGFS
 770         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 771
 772         iwl_mvm_fw_error_dump(mvm);
 773
 774         /* notify the userspace about the error we had */
 775         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 776 #endif
 777
 778         iwl_trans_stop_device(mvm->trans);
 779
 780         mvm->scan_status = IWL_MVM_SCAN_NONE;
 781         mvm->ps_disabled = false;
 782
 783         /* just in case one was running */
 784         ieee80211_remain_on_channel_expired(mvm->hw);
 785
 786         ieee80211_iterate_active_interfaces_atomic(
 787                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 788                 iwl_mvm_cleanup_iterator, mvm);
 789
 790         mvm->p2p_device_vif = NULL;
 791         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 792
 793         iwl_mvm_reset_phy_ctxts(mvm);
 794         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 795         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 796         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 797         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 798         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 799         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 800         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 801         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 802
 803         ieee80211_wake_queues(mvm->hw);
 804
 805         /* cleanup all stale references (scan, roc), but keep the
 806          * ucode_down ref until reconfig is complete */
 807         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 808
 809         /* clear any stale d0i3 state */
 810         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 811
 812         mvm->vif_count = 0;
 813         mvm->rx_ba_sessions = 0;
 814 }
 815
 816 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 817 {
 818         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 819         int ret;
 820
 821         mutex_lock(&mvm->mutex);
 822
 823         /* Clean up some internal and mac80211 state on restart */
 824         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 825                 iwl_mvm_restart_cleanup(mvm);
 826
 827         ret = iwl_mvm_up(mvm);
 828
 829         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 830                 /* Something went wrong - we need to finish some cleanup
 831                  * that normally iwl_mvm_mac_restart_complete() below
 832                  * would do.
 833                  */
 834                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 835                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 836         }
 837
 838         mutex_unlock(&mvm->mutex);
 839
 840         return ret;
 841 }
 842
 843 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 844 {
 845         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 846         int ret;
 847
 848         mutex_lock(&mvm->mutex);
 849
 850         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 851         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 852         ret = iwl_mvm_update_quotas(mvm, NULL);
 853         if (ret)
 854                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 855                         ret);
 856
 857         /* allow transport/FW low power modes */
 858         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 859
 860         mutex_unlock(&mvm->mutex);
 861 }
 862
 863 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 864 {
 865         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 866
 867         flush_work(&mvm->d0i3_exit_work);
 868         flush_work(&mvm->async_handlers_wk);
 869
 870         mutex_lock(&mvm->mutex);
 871
 872         /* disallow low power states when the FW is down */
 873         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 874
 875         /* async_handlers_wk is now blocked */
 876
 877         /*
 878          * The work item could be running or queued if the
 879          * ROC time event stops just as we get here.
 880          */
 881         cancel_work_sync(&mvm->roc_done_wk);
 882
 883         iwl_trans_stop_device(mvm->trans);
 884
 885         iwl_mvm_async_handlers_purge(mvm);
 886         /* async_handlers_list is empty and will stay empty: HW is stopped */
 887
 888         /* the fw is stopped, the aux sta is dead: clean up driver state */
 889         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 890
 891         mutex_unlock(&mvm->mutex);
 892
 893         /*
 894          * The worker might have been waiting for the mutex, let it run and
 895          * discover that its list is now empty.
 896          */
 897         cancel_work_sync(&mvm->async_handlers_wk);
 898 }
 899
 900 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 901 {
 902         u16 i;
 903
 904         lockdep_assert_held(&mvm->mutex);
 905
 906         for (i = 0; i < NUM_PHY_CTX; i++)
 907                 if (!mvm->phy_ctxts[i].ref)
 908                         return &mvm->phy_ctxts[i];
 909
 910         IWL_ERR(mvm, "No available PHY context\n");
 911         return NULL;
 912 }
 913
 914 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 915                                 s8 tx_power)
 916 {
 917         /* FW is in charge of regulatory enforcement */
 918         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 919                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 920                 .pwr_restriction = cpu_to_le16(tx_power),
 921         };
 922
 923         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 924                                     sizeof(reduce_txpwr_cmd),
 925                                     &reduce_txpwr_cmd);
 926 }
 927
 928 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 929                                      struct ieee80211_vif *vif)
 930 {
 931         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 932         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 933         int ret;
 934
 935         /*
 936          * make sure D0i3 exit is completed, otherwise a target access
 937          * during tx queue configuration could be done when still in
 938          * D0i3 state.
 939          */
 940         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 941         if (ret)
 942                 return ret;
 943
 944         /*
 945          * Not much to do here. The stack will not allow interface
 946          * types or combinations that we didn't advertise, so we
 947          * don't really have to check the types.
 948          */
 949
 950         mutex_lock(&mvm->mutex);
 951
 952         /* Allocate resources for the MAC context, and add it to the fw  */
 953         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 954         if (ret)
 955                 goto out_unlock;
 956
 957         /* Counting number of interfaces is needed for legacy PM */
 958         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 959                 mvm->vif_count++;
 960
 961         /*
 962          * The AP binding flow can be done only after the beacon
 963          * template is configured (which happens only in the mac80211
 964          * start_ap() flow), and adding the broadcast station can happen
 965          * only after the binding.
 966          * In addition, since modifying the MAC before adding a bcast
 967          * station is not allowed by the FW, delay the adding of MAC context to
 968          * the point where we can also add the bcast station.
 969          * In short: there's not much we can do at this point, other than
 970          * allocating resources :)
 971          */
 972         if (vif->type == NL80211_IFTYPE_AP ||
 973             vif->type == NL80211_IFTYPE_ADHOC) {
 974                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 975                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 976                                                qmask,
 977                                                ieee80211_vif_type_p2p(vif));
 978                 if (ret) {
 979                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 980                         goto out_release;
 981                 }
 982
 983                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 984                 goto out_unlock;
 985         }
 986
 987         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 988         if (ret)
 989                 goto out_release;
 990
 991         ret = iwl_mvm_power_update_mac(mvm);
 992         if (ret)
 993                 goto out_release;
 994
 995         /* beacon filtering */
 996         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 997         if (ret)
 998                 goto out_remove_mac;
 999
1000         if (!mvm->bf_allowed_vif &&
1001             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1002                 mvm->bf_allowed_vif = mvmvif;
1003                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1004                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1005         }
1006
1007         /*
1008          * P2P_DEVICE interface does not have a channel context assigned to it,
1009          * so a dedicated PHY context is allocated to it and the corresponding
1010          * MAC context is bound to it at this stage.
1011          */
1012         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1013
1014                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1015                 if (!mvmvif->phy_ctxt) {
1016                         ret = -ENOSPC;
1017                         goto out_free_bf;
1018                 }
1019
1020                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1021                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1022                 if (ret)
1023                         goto out_unref_phy;
1024
1025                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1026                 if (ret)
1027                         goto out_unbind;
1028
1029                 /* Save a pointer to p2p device vif, so it can later be used to
1030                  * update the p2p device MAC when a GO is started/stopped */
1031                 mvm->p2p_device_vif = vif;
1032         }
1033
1034         iwl_mvm_vif_dbgfs_register(mvm, vif);
1035         goto out_unlock;
1036
1037  out_unbind:
1038         iwl_mvm_binding_remove_vif(mvm, vif);
1039  out_unref_phy:
1040         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1041  out_free_bf:
1042         if (mvm->bf_allowed_vif == mvmvif) {
1043                 mvm->bf_allowed_vif = NULL;
1044                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1045                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1046         }
1047  out_remove_mac:
1048         mvmvif->phy_ctxt = NULL;
1049         iwl_mvm_mac_ctxt_remove(mvm, vif);
1050  out_release:
1051         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1052                 mvm->vif_count--;
1053
1054         iwl_mvm_mac_ctxt_release(mvm, vif);
1055  out_unlock:
1056         mutex_unlock(&mvm->mutex);
1057
1058         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1059
1060         return ret;
1061 }
1062
1063 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1064                                         struct ieee80211_vif *vif)
1065 {
1066         u32 tfd_msk = 0, ac;
1067
1068         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1069                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1070                         tfd_msk |= BIT(vif->hw_queue[ac]);
1071
1072         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1073                 tfd_msk |= BIT(vif->cab_queue);
1074
1075         if (tfd_msk) {
1076                 mutex_lock(&mvm->mutex);
1077                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1078                 mutex_unlock(&mvm->mutex);
1079         }
1080
1081         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1082                 /*
1083                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1084                  * We assume here that all the packets sent to the OFFCHANNEL
1085                  * queue are sent in ROC session.
1086                  */
1087                 flush_work(&mvm->roc_done_wk);
1088         } else {
1089                 /*
1090                  * By now, all the AC queues are empty. The AGG queues are
1091                  * empty too. We already got all the Tx responses for all the
1092                  * packets in the queues. The drain work can have been
1093                  * triggered. Flush it.
1094                  */
1095                 flush_work(&mvm->sta_drained_wk);
1096         }
1097 }
1098
1099 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1100                                          struct ieee80211_vif *vif)
1101 {
1102         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1104
1105         iwl_mvm_prepare_mac_removal(mvm, vif);
1106
1107         mutex_lock(&mvm->mutex);
1108
1109         if (mvm->bf_allowed_vif == mvmvif) {
1110                 mvm->bf_allowed_vif = NULL;
1111                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1112                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1113         }
1114
1115         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1116
1117         /*
1118          * For AP/GO interface, the tear down of the resources allocated to the
1119          * interface is be handled as part of the stop_ap flow.
1120          */
1121         if (vif->type == NL80211_IFTYPE_AP ||
1122             vif->type == NL80211_IFTYPE_ADHOC) {
1123 #ifdef CONFIG_NL80211_TESTMODE
1124                 if (vif == mvm->noa_vif) {
1125                         mvm->noa_vif = NULL;
1126                         mvm->noa_duration = 0;
1127                 }
1128 #endif
1129                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1130                 goto out_release;
1131         }
1132
1133         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1134                 mvm->p2p_device_vif = NULL;
1135                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1136                 iwl_mvm_binding_remove_vif(mvm, vif);
1137                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1138                 mvmvif->phy_ctxt = NULL;
1139         }
1140
1141         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1142                 mvm->vif_count--;
1143
1144         iwl_mvm_power_update_mac(mvm);
1145         iwl_mvm_mac_ctxt_remove(mvm, vif);
1146
1147 out_release:
1148         iwl_mvm_mac_ctxt_release(mvm, vif);
1149         mutex_unlock(&mvm->mutex);
1150 }
1151
1152 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1153 {
1154         return 0;
1155 }
1156
1157 struct iwl_mvm_mc_iter_data {
1158         struct iwl_mvm *mvm;
1159         int port_id;
1160 };
1161
1162 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1163                                       struct ieee80211_vif *vif)
1164 {
1165         struct iwl_mvm_mc_iter_data *data = _data;
1166         struct iwl_mvm *mvm = data->mvm;
1167         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1168         int ret, len;
1169
1170         /* if we don't have free ports, mcast frames will be dropped */
1171         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1172                 return;
1173
1174         if (vif->type != NL80211_IFTYPE_STATION ||
1175             !vif->bss_conf.assoc)
1176                 return;
1177
1178         cmd->port_id = data->port_id++;
1179         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1180         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1181
1182         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1183         if (ret)
1184                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1185 }
1186
1187 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1188 {
1189         struct iwl_mvm_mc_iter_data iter_data = {
1190                 .mvm = mvm,
1191         };
1192
1193         lockdep_assert_held(&mvm->mutex);
1194
1195         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1196                 return;
1197
1198         ieee80211_iterate_active_interfaces_atomic(
1199                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1200                 iwl_mvm_mc_iface_iterator, &iter_data);
1201 }
1202
1203 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1204                                      struct netdev_hw_addr_list *mc_list)
1205 {
1206         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1207         struct iwl_mcast_filter_cmd *cmd;
1208         struct netdev_hw_addr *addr;
1209         int addr_count = netdev_hw_addr_list_count(mc_list);
1210         bool pass_all = false;
1211         int len;
1212
1213         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1214                 pass_all = true;
1215                 addr_count = 0;
1216         }
1217
1218         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1219         cmd = kzalloc(len, GFP_ATOMIC);
1220         if (!cmd)
1221                 return 0;
1222
1223         if (pass_all) {
1224                 cmd->pass_all = 1;
1225                 return (u64)(unsigned long)cmd;
1226         }
1227
1228         netdev_hw_addr_list_for_each(addr, mc_list) {
1229                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1230                                    cmd->count, addr->addr);
1231                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1232                        addr->addr, ETH_ALEN);
1233                 cmd->count++;
1234         }
1235
1236         return (u64)(unsigned long)cmd;
1237 }
1238
1239 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1240                                      unsigned int changed_flags,
1241                                      unsigned int *total_flags,
1242                                      u64 multicast)
1243 {
1244         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1245         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1246
1247         mutex_lock(&mvm->mutex);
1248
1249         /* replace previous configuration */
1250         kfree(mvm->mcast_filter_cmd);
1251         mvm->mcast_filter_cmd = cmd;
1252
1253         if (!cmd)
1254                 goto out;
1255
1256         iwl_mvm_recalc_multicast(mvm);
1257 out:
1258         mutex_unlock(&mvm->mutex);
1259         *total_flags = 0;
1260 }
1261
1262 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1263 struct iwl_bcast_iter_data {
1264         struct iwl_mvm *mvm;
1265         struct iwl_bcast_filter_cmd *cmd;
1266         u8 current_filter;
1267 };
1268
1269 static void
1270 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1271                          const struct iwl_fw_bcast_filter *in_filter,
1272                          struct iwl_fw_bcast_filter *out_filter)
1273 {
1274         struct iwl_fw_bcast_filter_attr *attr;
1275         int i;
1276
1277         memcpy(out_filter, in_filter, sizeof(*out_filter));
1278
1279         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1280                 attr = &out_filter->attrs[i];
1281
1282                 if (!attr->mask)
1283                         break;
1284
1285                 switch (attr->reserved1) {
1286                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1287                         if (vif->bss_conf.arp_addr_cnt != 1) {
1288                                 attr->mask = 0;
1289                                 continue;
1290                         }
1291
1292                         attr->val = vif->bss_conf.arp_addr_list[0];
1293                         break;
1294                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1295                         attr->val = *(__be32 *)&vif->addr[2];
1296                         break;
1297                 default:
1298                         break;
1299                 }
1300                 attr->reserved1 = 0;
1301                 out_filter->num_attrs++;
1302         }
1303 }
1304
1305 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1306                                           struct ieee80211_vif *vif)
1307 {
1308         struct iwl_bcast_iter_data *data = _data;
1309         struct iwl_mvm *mvm = data->mvm;
1310         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1311         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1312         struct iwl_fw_bcast_mac *bcast_mac;
1313         int i;
1314
1315         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1316                 return;
1317
1318         bcast_mac = &cmd->macs[mvmvif->id];
1319
1320         /*
1321          * enable filtering only for associated stations, but not for P2P
1322          * Clients
1323          */
1324         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1325             !vif->bss_conf.assoc)
1326                 return;
1327
1328         bcast_mac->default_discard = 1;
1329
1330         /* copy all configured filters */
1331         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1332                 /*
1333                  * Make sure we don't exceed our filters limit.
1334                  * if there is still a valid filter to be configured,
1335                  * be on the safe side and just allow bcast for this mac.
1336                  */
1337                 if (WARN_ON_ONCE(data->current_filter >=
1338                                  ARRAY_SIZE(cmd->filters))) {
1339                         bcast_mac->default_discard = 0;
1340                         bcast_mac->attached_filters = 0;
1341                         break;
1342                 }
1343
1344                 iwl_mvm_set_bcast_filter(vif,
1345                                          &mvm->bcast_filters[i],
1346                                          &cmd->filters[data->current_filter]);
1347
1348                 /* skip current filter if it contains no attributes */
1349                 if (!cmd->filters[data->current_filter].num_attrs)
1350                         continue;
1351
1352                 /* attach the filter to current mac */
1353                 bcast_mac->attached_filters |=
1354                                 cpu_to_le16(BIT(data->current_filter));
1355
1356                 data->current_filter++;
1357         }
1358 }
1359
1360 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1361                                     struct iwl_bcast_filter_cmd *cmd)
1362 {
1363         struct iwl_bcast_iter_data iter_data = {
1364                 .mvm = mvm,
1365                 .cmd = cmd,
1366         };
1367
1368         memset(cmd, 0, sizeof(*cmd));
1369         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1370         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1371
1372 #ifdef CONFIG_IWLWIFI_DEBUGFS
1373         /* use debugfs filters/macs if override is configured */
1374         if (mvm->dbgfs_bcast_filtering.override) {
1375                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1376                        sizeof(cmd->filters));
1377                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1378                        sizeof(cmd->macs));
1379                 return true;
1380         }
1381 #endif
1382
1383         /* if no filters are configured, do nothing */
1384         if (!mvm->bcast_filters)
1385                 return false;
1386
1387         /* configure and attach these filters for each associated sta vif */
1388         ieee80211_iterate_active_interfaces(
1389                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1390                 iwl_mvm_bcast_filter_iterator, &iter_data);
1391
1392         return true;
1393 }
1394 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1395                                           struct ieee80211_vif *vif)
1396 {
1397         struct iwl_bcast_filter_cmd cmd;
1398
1399         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1400                 return 0;
1401
1402         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1403                 return 0;
1404
1405         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1406                                     sizeof(cmd), &cmd);
1407 }
1408 #else
1409 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1410                                                  struct ieee80211_vif *vif)
1411 {
1412         return 0;
1413 }
1414 #endif
1415
1416 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1417 {
1418         struct ieee80211_sta *sta;
1419         struct iwl_mvm_sta *mvmsta;
1420         int i;
1421
1422         lockdep_assert_held(&mvm->mutex);
1423
1424         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1425                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1426                                                 lockdep_is_held(&mvm->mutex));
1427                 if (!sta || IS_ERR(sta) || !sta->tdls)
1428                         continue;
1429
1430                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1431                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1432                                 NL80211_TDLS_TEARDOWN,
1433                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1434                                 GFP_KERNEL);
1435         }
1436 }
1437
1438 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1439                                              struct ieee80211_vif *vif,
1440                                              struct ieee80211_bss_conf *bss_conf,
1441                                              u32 changes)
1442 {
1443         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1444         int ret;
1445
1446         /*
1447          * Re-calculate the tsf id, as the master-slave relations depend on the
1448          * beacon interval, which was not known when the station interface was
1449          * added.
1450          */
1451         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1452                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1453
1454         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1455         if (ret)
1456                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1457
1458         if (changes & BSS_CHANGED_ASSOC) {
1459                 if (bss_conf->assoc) {
1460                         /* add quota for this interface */
1461                         ret = iwl_mvm_update_quotas(mvm, NULL);
1462                         if (ret) {
1463                                 IWL_ERR(mvm, "failed to update quotas\n");
1464                                 return;
1465                         }
1466
1467                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1468                                      &mvm->status)) {
1469                                 /*
1470                                  * If we're restarting then the firmware will
1471                                  * obviously have lost synchronisation with
1472                                  * the AP. It will attempt to synchronise by
1473                                  * itself, but we can make it more reliable by
1474                                  * scheduling a session protection time event.
1475                                  *
1476                                  * The firmware needs to receive a beacon to
1477                                  * catch up with synchronisation, use 110% of
1478                                  * the beacon interval.
1479                                  *
1480                                  * Set a large maximum delay to allow for more
1481                                  * than a single interface.
1482                                  */
1483                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1484                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1485                                                         5 * dur, false);
1486                         }
1487
1488                         iwl_mvm_sf_update(mvm, vif, false);
1489                         iwl_mvm_power_vif_assoc(mvm, vif);
1490                         if (vif->p2p) {
1491                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1492                                 iwl_mvm_update_smps(mvm, vif,
1493                                                     IWL_MVM_SMPS_REQ_PROT,
1494                                                     IEEE80211_SMPS_DYNAMIC);
1495                         }
1496                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1497                         /*
1498                          * If update fails - SF might be running in associated
1499                          * mode while disassociated - which is forbidden.
1500                          */
1501                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1502                                   "Failed to update SF upon disassociation\n");
1503
1504                         /* remove AP station now that the MAC is unassoc */
1505                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1506                         if (ret)
1507                                 IWL_ERR(mvm, "failed to remove AP station\n");
1508
1509                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1510                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1511                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1512                         /* remove quota for this interface */
1513                         ret = iwl_mvm_update_quotas(mvm, NULL);
1514                         if (ret)
1515                                 IWL_ERR(mvm, "failed to update quotas\n");
1516
1517                         if (vif->p2p)
1518                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1519                 }
1520
1521                 iwl_mvm_recalc_multicast(mvm);
1522                 iwl_mvm_configure_bcast_filter(mvm, vif);
1523
1524                 /* reset rssi values */
1525                 mvmvif->bf_data.ave_beacon_signal = 0;
1526
1527                 iwl_mvm_bt_coex_vif_change(mvm);
1528                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1529                                     IEEE80211_SMPS_AUTOMATIC);
1530         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1531                 /*
1532                  * We received a beacon _after_ association so
1533                  * remove the session protection.
1534                  */
1535                 iwl_mvm_remove_time_event(mvm, mvmvif,
1536                                           &mvmvif->time_event_data);
1537         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1538                               BSS_CHANGED_QOS)) {
1539                 ret = iwl_mvm_power_update_mac(mvm);
1540                 if (ret)
1541                         IWL_ERR(mvm, "failed to update power mode\n");
1542         }
1543
1544         if (changes & BSS_CHANGED_BEACON_INFO) {
1545                 iwl_mvm_sf_update(mvm, vif, false);
1546                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1547         }
1548
1549         if (changes & BSS_CHANGED_TXPOWER) {
1550                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1551                                 bss_conf->txpower);
1552                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1553         }
1554
1555         if (changes & BSS_CHANGED_CQM) {
1556                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1557                 /* reset cqm events tracking */
1558                 mvmvif->bf_data.last_cqm_event = 0;
1559                 if (mvmvif->bf_data.bf_enabled) {
1560                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1561                         if (ret)
1562                                 IWL_ERR(mvm,
1563                                         "failed to update CQM thresholds\n");
1564                 }
1565         }
1566
1567         if (changes & BSS_CHANGED_ARP_FILTER) {
1568                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1569                 iwl_mvm_configure_bcast_filter(mvm, vif);
1570         }
1571 }
1572
1573 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1574                                  struct ieee80211_vif *vif)
1575 {
1576         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1577         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1578         int ret;
1579
1580         /*
1581          * iwl_mvm_mac_ctxt_add() might read directly from the device
1582          * (the system time), so make sure it is available.
1583          */
1584         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1585         if (ret)
1586                 return ret;
1587
1588         mutex_lock(&mvm->mutex);
1589
1590         /* Send the beacon template */
1591         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1592         if (ret)
1593                 goto out_unlock;
1594
1595         /*
1596          * Re-calculate the tsf id, as the master-slave relations depend on the
1597          * beacon interval, which was not known when the AP interface was added.
1598          */
1599         if (vif->type == NL80211_IFTYPE_AP)
1600                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1601
1602         /* Add the mac context */
1603         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1604         if (ret)
1605                 goto out_unlock;
1606
1607         /* Perform the binding */
1608         ret = iwl_mvm_binding_add_vif(mvm, vif);
1609         if (ret)
1610                 goto out_remove;
1611
1612         /* Send the bcast station. At this stage the TBTT and DTIM time events
1613          * are added and applied to the scheduler */
1614         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1615         if (ret)
1616                 goto out_unbind;
1617
1618         /* must be set before quota calculations */
1619         mvmvif->ap_ibss_active = true;
1620
1621         /* power updated needs to be done before quotas */
1622         iwl_mvm_power_update_mac(mvm);
1623
1624         ret = iwl_mvm_update_quotas(mvm, NULL);
1625         if (ret)
1626                 goto out_quota_failed;
1627
1628         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1629         if (vif->p2p && mvm->p2p_device_vif)
1630                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1631
1632         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1633
1634         iwl_mvm_bt_coex_vif_change(mvm);
1635
1636         /* we don't support TDLS during DCM */
1637         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1638                 iwl_mvm_teardown_tdls_peers(mvm);
1639
1640         mutex_unlock(&mvm->mutex);
1641         return 0;
1642
1643 out_quota_failed:
1644         iwl_mvm_power_update_mac(mvm);
1645         mvmvif->ap_ibss_active = false;
1646         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1647 out_unbind:
1648         iwl_mvm_binding_remove_vif(mvm, vif);
1649 out_remove:
1650         iwl_mvm_mac_ctxt_remove(mvm, vif);
1651 out_unlock:
1652         mutex_unlock(&mvm->mutex);
1653         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1654         return ret;
1655 }
1656
1657 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1658                                  struct ieee80211_vif *vif)
1659 {
1660         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1661         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1662
1663         iwl_mvm_prepare_mac_removal(mvm, vif);
1664
1665         mutex_lock(&mvm->mutex);
1666
1667         /* Handle AP stop while in CSA */
1668         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1669                 iwl_mvm_remove_time_event(mvm, mvmvif,
1670                                           &mvmvif->time_event_data);
1671                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1672         }
1673
1674         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1675                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1676                 mvm->csa_tx_block_bcn_timeout = 0;
1677         }
1678
1679         mvmvif->ap_ibss_active = false;
1680         mvm->ap_last_beacon_gp2 = 0;
1681
1682         iwl_mvm_bt_coex_vif_change(mvm);
1683
1684         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1685
1686         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1687         if (vif->p2p && mvm->p2p_device_vif)
1688                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1689
1690         iwl_mvm_update_quotas(mvm, NULL);
1691         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1692         iwl_mvm_binding_remove_vif(mvm, vif);
1693
1694         iwl_mvm_power_update_mac(mvm);
1695
1696         iwl_mvm_mac_ctxt_remove(mvm, vif);
1697
1698         mutex_unlock(&mvm->mutex);
1699 }
1700
1701 static void
1702 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1703                                  struct ieee80211_vif *vif,
1704                                  struct ieee80211_bss_conf *bss_conf,
1705                                  u32 changes)
1706 {
1707         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1708
1709         /* Changes will be applied when the AP/IBSS is started */
1710         if (!mvmvif->ap_ibss_active)
1711                 return;
1712
1713         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1714                        BSS_CHANGED_BANDWIDTH) &&
1715             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1716                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1717
1718         /* Need to send a new beacon template to the FW */
1719         if (changes & BSS_CHANGED_BEACON &&
1720             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1721                 IWL_WARN(mvm, "Failed updating beacon data\n");
1722 }
1723
1724 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1725                                      struct ieee80211_vif *vif,
1726                                      struct ieee80211_bss_conf *bss_conf,
1727                                      u32 changes)
1728 {
1729         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1730
1731         /*
1732          * iwl_mvm_bss_info_changed_station() might call
1733          * iwl_mvm_protect_session(), which reads directly from
1734          * the device (the system time), so make sure it is available.
1735          */
1736         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1737                 return;
1738
1739         mutex_lock(&mvm->mutex);
1740
1741         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1742                 iwl_mvm_scan_offload_stop(mvm, true);
1743
1744         switch (vif->type) {
1745         case NL80211_IFTYPE_STATION:
1746                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1747                 break;
1748         case NL80211_IFTYPE_AP:
1749         case NL80211_IFTYPE_ADHOC:
1750                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1751                 break;
1752         default:
1753                 /* shouldn't happen */
1754                 WARN_ON_ONCE(1);
1755         }
1756
1757         mutex_unlock(&mvm->mutex);
1758         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1759 }
1760
1761 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1762                                           enum iwl_scan_status scan_type)
1763 {
1764         int ret;
1765         bool wait_for_handlers = false;
1766
1767         mutex_lock(&mvm->mutex);
1768
1769         if (mvm->scan_status != scan_type) {
1770                 ret = 0;
1771                 /* make sure there are no pending notifications */
1772                 wait_for_handlers = true;
1773                 goto out;
1774         }
1775
1776         switch (scan_type) {
1777         case IWL_MVM_SCAN_SCHED:
1778                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1779                 break;
1780         case IWL_MVM_SCAN_OS:
1781                 ret = iwl_mvm_cancel_scan(mvm);
1782                 break;
1783         case IWL_MVM_SCAN_NONE:
1784         default:
1785                 WARN_ON_ONCE(1);
1786                 ret = -EINVAL;
1787                 break;
1788         }
1789         if (ret)
1790                 goto out;
1791
1792         wait_for_handlers = true;
1793 out:
1794         mutex_unlock(&mvm->mutex);
1795
1796         /* make sure we consume the completion notification */
1797         if (wait_for_handlers)
1798                 iwl_mvm_wait_for_async_handlers(mvm);
1799
1800         return ret;
1801 }
1802 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1803                                struct ieee80211_vif *vif,
1804                                struct ieee80211_scan_request *hw_req)
1805 {
1806         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1807         struct cfg80211_scan_request *req = &hw_req->req;
1808         int ret;
1809
1810         if (req->n_channels == 0 ||
1811             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1812                 return -EINVAL;
1813
1814         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1815         if (ret)
1816                 return ret;
1817
1818         mutex_lock(&mvm->mutex);
1819
1820         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1821                 ret = -EBUSY;
1822                 goto out;
1823         }
1824
1825         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1826
1827         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1828                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1829         else
1830                 ret = iwl_mvm_scan_request(mvm, vif, req);
1831
1832         if (ret)
1833                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1834 out:
1835         mutex_unlock(&mvm->mutex);
1836         return ret;
1837 }
1838
1839 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1840                                        struct ieee80211_vif *vif)
1841 {
1842         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1843
1844         mutex_lock(&mvm->mutex);
1845
1846         iwl_mvm_cancel_scan(mvm);
1847
1848         mutex_unlock(&mvm->mutex);
1849 }
1850
1851 static void
1852 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1853                                   struct ieee80211_sta *sta, u16 tids,
1854                                   int num_frames,
1855                                   enum ieee80211_frame_release_type reason,
1856                                   bool more_data)
1857 {
1858         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1859
1860         /* Called when we need to transmit (a) frame(s) from mac80211 */
1861
1862         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1863                                           tids, more_data, false);
1864 }
1865
1866 static void
1867 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1868                                     struct ieee80211_sta *sta, u16 tids,
1869                                     int num_frames,
1870                                     enum ieee80211_frame_release_type reason,
1871                                     bool more_data)
1872 {
1873         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1874
1875         /* Called when we need to transmit (a) frame(s) from agg queue */
1876
1877         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1878                                           tids, more_data, true);
1879 }
1880
1881 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1882                                    struct ieee80211_vif *vif,
1883                                    enum sta_notify_cmd cmd,
1884                                    struct ieee80211_sta *sta)
1885 {
1886         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1887         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1888         int tid;
1889
1890         switch (cmd) {
1891         case STA_NOTIFY_SLEEP:
1892                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1893                         ieee80211_sta_block_awake(hw, sta, true);
1894                 spin_lock_bh(&mvmsta->lock);
1895                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1896                         struct iwl_mvm_tid_data *tid_data;
1897
1898                         tid_data = &mvmsta->tid_data[tid];
1899                         if (tid_data->state != IWL_AGG_ON &&
1900                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1901                                 continue;
1902                         if (iwl_mvm_tid_queued(tid_data) == 0)
1903                                 continue;
1904                         ieee80211_sta_set_buffered(sta, tid, true);
1905                 }
1906                 spin_unlock_bh(&mvmsta->lock);
1907                 /*
1908                  * The fw updates the STA to be asleep. Tx packets on the Tx
1909                  * queues to this station will not be transmitted. The fw will
1910                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1911                  */
1912                 break;
1913         case STA_NOTIFY_AWAKE:
1914                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1915                         break;
1916                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1917                 break;
1918         default:
1919                 break;
1920         }
1921 }
1922
1923 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1924                                        struct ieee80211_vif *vif,
1925                                        struct ieee80211_sta *sta)
1926 {
1927         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1928         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1929
1930         /*
1931          * This is called before mac80211 does RCU synchronisation,
1932          * so here we already invalidate our internal RCU-protected
1933          * station pointer. The rest of the code will thus no longer
1934          * be able to find the station this way, and we don't rely
1935          * on further RCU synchronisation after the sta_state()
1936          * callback deleted the station.
1937          */
1938         mutex_lock(&mvm->mutex);
1939         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1940                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1941                                    ERR_PTR(-ENOENT));
1942         mutex_unlock(&mvm->mutex);
1943 }
1944
1945 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1946 {
1947         struct ieee80211_sta *sta;
1948         struct iwl_mvm_sta *mvmsta;
1949         int count = 0;
1950         int i;
1951
1952         lockdep_assert_held(&mvm->mutex);
1953
1954         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1955                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1956                                                 lockdep_is_held(&mvm->mutex));
1957                 if (!sta || IS_ERR(sta) || !sta->tdls)
1958                         continue;
1959
1960                 if (vif) {
1961                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1962                         if (mvmsta->vif != vif)
1963                                 continue;
1964                 }
1965
1966                 count++;
1967         }
1968
1969         return count;
1970 }
1971
1972 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1973                                       struct ieee80211_vif *vif,
1974                                       bool sta_added)
1975 {
1976         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1977
1978         /*
1979          * Disable ps when the first TDLS sta is added and re-enable it
1980          * when the last TDLS sta is removed
1981          */
1982         if ((tdls_sta_cnt == 1 && sta_added) ||
1983             (tdls_sta_cnt == 0 && !sta_added))
1984                 iwl_mvm_power_update_mac(mvm);
1985 }
1986
1987 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1988                                  struct ieee80211_vif *vif,
1989                                  struct ieee80211_sta *sta,
1990                                  enum ieee80211_sta_state old_state,
1991                                  enum ieee80211_sta_state new_state)
1992 {
1993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1994         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1995         int ret;
1996
1997         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1998                            sta->addr, old_state, new_state);
1999
2000         /* this would be a mac80211 bug ... but don't crash */
2001         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2002                 return -EINVAL;
2003
2004         /* if a STA is being removed, reuse its ID */
2005         flush_work(&mvm->sta_drained_wk);
2006
2007         mutex_lock(&mvm->mutex);
2008         if (old_state == IEEE80211_STA_NOTEXIST &&
2009             new_state == IEEE80211_STA_NONE) {
2010                 /*
2011                  * Firmware bug - it'll crash if the beacon interval is less
2012                  * than 16. We can't avoid connecting at all, so refuse the
2013                  * station state change, this will cause mac80211 to abandon
2014                  * attempts to connect to this AP, and eventually wpa_s will
2015                  * blacklist the AP...
2016                  */
2017                 if (vif->type == NL80211_IFTYPE_STATION &&
2018                     vif->bss_conf.beacon_int < 16) {
2019                         IWL_ERR(mvm,
2020                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2021                                 sta->addr, vif->bss_conf.beacon_int);
2022                         ret = -EINVAL;
2023                         goto out_unlock;
2024                 }
2025
2026                 if (sta->tdls &&
2027                     (vif->p2p ||
2028                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2029                                                 IWL_MVM_TDLS_STA_COUNT ||
2030                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2031                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2032                         ret = -EBUSY;
2033                         goto out_unlock;
2034                 }
2035
2036                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2037                 if (sta->tdls && ret == 0)
2038                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2039         } else if (old_state == IEEE80211_STA_NONE &&
2040                    new_state == IEEE80211_STA_AUTH) {
2041                 /*
2042                  * EBS may be disabled due to previous failures reported by FW.
2043                  * Reset EBS status here assuming environment has been changed.
2044                  */
2045                 mvm->last_ebs_successful = true;
2046                 ret = 0;
2047         } else if (old_state == IEEE80211_STA_AUTH &&
2048                    new_state == IEEE80211_STA_ASSOC) {
2049                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2050                 if (ret == 0)
2051                         iwl_mvm_rs_rate_init(mvm, sta,
2052                                              mvmvif->phy_ctxt->channel->band,
2053                                              true);
2054         } else if (old_state == IEEE80211_STA_ASSOC &&
2055                    new_state == IEEE80211_STA_AUTHORIZED) {
2056
2057                 /* we don't support TDLS during DCM */
2058                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2059                         iwl_mvm_teardown_tdls_peers(mvm);
2060
2061                 /* enable beacon filtering */
2062                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2063                 ret = 0;
2064         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2065                    new_state == IEEE80211_STA_ASSOC) {
2066                 /* disable beacon filtering */
2067                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2068                 ret = 0;
2069         } else if (old_state == IEEE80211_STA_ASSOC &&
2070                    new_state == IEEE80211_STA_AUTH) {
2071                 ret = 0;
2072         } else if (old_state == IEEE80211_STA_AUTH &&
2073                    new_state == IEEE80211_STA_NONE) {
2074                 ret = 0;
2075         } else if (old_state == IEEE80211_STA_NONE &&
2076                    new_state == IEEE80211_STA_NOTEXIST) {
2077                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2078                 if (sta->tdls)
2079                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2080         } else {
2081                 ret = -EIO;
2082         }
2083  out_unlock:
2084         mutex_unlock(&mvm->mutex);
2085
2086         return ret;
2087 }
2088
2089 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2090 {
2091         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2092
2093         mvm->rts_threshold = value;
2094
2095         return 0;
2096 }
2097
2098 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2099                                   struct ieee80211_vif *vif,
2100                                   struct ieee80211_sta *sta, u32 changed)
2101 {
2102         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2103
2104         if (vif->type == NL80211_IFTYPE_STATION &&
2105             changed & IEEE80211_RC_NSS_CHANGED)
2106                 iwl_mvm_sf_update(mvm, vif, false);
2107 }
2108
2109 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2110                                struct ieee80211_vif *vif, u16 ac,
2111                                const struct ieee80211_tx_queue_params *params)
2112 {
2113         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2114         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2115
2116         mvmvif->queue_params[ac] = *params;
2117
2118         /*
2119          * No need to update right away, we'll get BSS_CHANGED_QOS
2120          * The exception is P2P_DEVICE interface which needs immediate update.
2121          */
2122         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2123                 int ret;
2124
2125                 mutex_lock(&mvm->mutex);
2126                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2127                 mutex_unlock(&mvm->mutex);
2128                 return ret;
2129         }
2130         return 0;
2131 }
2132
2133 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2134                                       struct ieee80211_vif *vif)
2135 {
2136         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2137         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2138                            200 + vif->bss_conf.beacon_int);
2139         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2140                                100 + vif->bss_conf.beacon_int);
2141
2142         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2143                 return;
2144
2145         /*
2146          * iwl_mvm_protect_session() reads directly from the device
2147          * (the system time), so make sure it is available.
2148          */
2149         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2150                 return;
2151
2152         mutex_lock(&mvm->mutex);
2153         /* Try really hard to protect the session and hear a beacon */
2154         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2155         mutex_unlock(&mvm->mutex);
2156
2157         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2158 }
2159
2160 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2161                                                   struct ieee80211_vif *vif)
2162 {
2163         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2164         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2165
2166         /*
2167          * iwl_mvm_protect_session() reads directly from the device
2168          * (the system time), so make sure it is available.
2169          */
2170         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2171                 return;
2172
2173         mutex_lock(&mvm->mutex);
2174         /* Protect the session to hear the TDLS setup response on the channel */
2175         iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
2176         mutex_unlock(&mvm->mutex);
2177
2178         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2179 }
2180
2181 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2182                                         struct ieee80211_vif *vif,
2183                                         struct cfg80211_sched_scan_request *req,
2184                                         struct ieee80211_scan_ies *ies)
2185 {
2186         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2187         int ret;
2188
2189         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2190         if (ret)
2191                 return ret;
2192
2193         mutex_lock(&mvm->mutex);
2194
2195         if (!iwl_mvm_is_idle(mvm)) {
2196                 ret = -EBUSY;
2197                 goto out;
2198         }
2199
2200         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2201                 ret = -EBUSY;
2202                 goto out;
2203         }
2204
2205         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2206
2207         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2208                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2209                 if (ret)
2210                         goto err;
2211         }
2212
2213         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2214         if (ret)
2215                 goto err;
2216
2217         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2218                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2219         else
2220                 ret = iwl_mvm_sched_scan_start(mvm, req);
2221
2222         if (!ret)
2223                 goto out;
2224 err:
2225         mvm->scan_status = IWL_MVM_SCAN_NONE;
2226 out:
2227         mutex_unlock(&mvm->mutex);
2228         return ret;
2229 }
2230
2231 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2232                                        struct ieee80211_vif *vif)
2233 {
2234         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2235         int ret;
2236
2237         mutex_lock(&mvm->mutex);
2238         ret = iwl_mvm_scan_offload_stop(mvm, false);
2239         mutex_unlock(&mvm->mutex);
2240         iwl_mvm_wait_for_async_handlers(mvm);
2241
2242         return ret;
2243 }
2244
2245 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2246                                enum set_key_cmd cmd,
2247                                struct ieee80211_vif *vif,
2248                                struct ieee80211_sta *sta,
2249                                struct ieee80211_key_conf *key)
2250 {
2251         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2252         int ret;
2253
2254         if (iwlwifi_mod_params.sw_crypto) {
2255                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2256                 return -EOPNOTSUPP;
2257         }
2258
2259         switch (key->cipher) {
2260         case WLAN_CIPHER_SUITE_TKIP:
2261                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2262                 /* fall-through */
2263         case WLAN_CIPHER_SUITE_CCMP:
2264                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2265                 break;
2266         case WLAN_CIPHER_SUITE_AES_CMAC:
2267                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2268                 break;
2269         case WLAN_CIPHER_SUITE_WEP40:
2270         case WLAN_CIPHER_SUITE_WEP104:
2271                 /*
2272                  * Support for TX only, at least for now, so accept
2273                  * the key and do nothing else. Then mac80211 will
2274                  * pass it for TX but we don't have to use it for RX.
2275                  */
2276                 return 0;
2277         default:
2278                 /* currently FW supports only one optional cipher scheme */
2279                 if (hw->n_cipher_schemes &&
2280                     hw->cipher_schemes->cipher == key->cipher)
2281                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2282                 else
2283                         return -EOPNOTSUPP;
2284         }
2285
2286         mutex_lock(&mvm->mutex);
2287
2288         switch (cmd) {
2289         case SET_KEY:
2290                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2291                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2292                         /*
2293                          * GTK on AP interface is a TX-only key, return 0;
2294                          * on IBSS they're per-station and because we're lazy
2295                          * we don't support them for RX, so do the same.
2296                          */
2297                         ret = 0;
2298                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2299                         break;
2300                 }
2301
2302                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2303                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2304                 if (ret) {
2305                         IWL_WARN(mvm, "set key failed\n");
2306                         /*
2307                          * can't add key for RX, but we don't need it
2308                          * in the device for TX so still return 0
2309                          */
2310                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2311                         ret = 0;
2312                 }
2313
2314                 break;
2315         case DISABLE_KEY:
2316                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2317                         ret = 0;
2318                         break;
2319                 }
2320
2321                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2322                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2323                 break;
2324         default:
2325                 ret = -EINVAL;
2326         }
2327
2328         mutex_unlock(&mvm->mutex);
2329         return ret;
2330 }
2331
2332 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2333                                         struct ieee80211_vif *vif,
2334                                         struct ieee80211_key_conf *keyconf,
2335                                         struct ieee80211_sta *sta,
2336                                         u32 iv32, u16 *phase1key)
2337 {
2338         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2339
2340         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2341                 return;
2342
2343         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2344 }
2345
2346
2347 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2348                                struct iwl_rx_packet *pkt, void *data)
2349 {
2350         struct iwl_mvm *mvm =
2351                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2352         struct iwl_hs20_roc_res *resp;
2353         int resp_len = iwl_rx_packet_payload_len(pkt);
2354         struct iwl_mvm_time_event_data *te_data = data;
2355
2356         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2357                 return true;
2358
2359         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2360                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2361                 return true;
2362         }
2363
2364         resp = (void *)pkt->data;
2365
2366         IWL_DEBUG_TE(mvm,
2367                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2368                      resp->status, resp->event_unique_id);
2369
2370         te_data->uid = le32_to_cpu(resp->event_unique_id);
2371         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2372                      te_data->uid);
2373
2374         spin_lock_bh(&mvm->time_event_lock);
2375         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2376         spin_unlock_bh(&mvm->time_event_lock);
2377
2378         return true;
2379 }
2380
2381 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2382 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2383                                     struct ieee80211_channel *channel,
2384                                     struct ieee80211_vif *vif,
2385                                     int duration)
2386 {
2387         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2388         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2389         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2390         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2391         struct iwl_notification_wait wait_time_event;
2392         struct iwl_hs20_roc_req aux_roc_req = {
2393                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2394                 .id_and_color =
2395                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2396                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2397                 /* Set the channel info data */
2398                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2399                         PHY_BAND_24 : PHY_BAND_5,
2400                 .channel_info.channel = channel->hw_value,
2401                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2402                 /* Set the time and duration */
2403                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2404                 .apply_time_max_delay =
2405                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2406                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2407          };
2408
2409         /* Set the node address */
2410         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2411
2412         te_data->vif = vif;
2413         te_data->duration = duration;
2414         te_data->id = HOT_SPOT_CMD;
2415
2416         lockdep_assert_held(&mvm->mutex);
2417
2418         spin_lock_bh(&mvm->time_event_lock);
2419         list_add_tail(&te_data->list, &mvm->time_event_list);
2420         spin_unlock_bh(&mvm->time_event_lock);
2421
2422         /*
2423          * Use a notification wait, which really just processes the
2424          * command response and doesn't wait for anything, in order
2425          * to be able to process the response and get the UID inside
2426          * the RX path. Using CMD_WANT_SKB doesn't work because it
2427          * stores the buffer and then wakes up this thread, by which
2428          * time another notification (that the time event started)
2429          * might already be processed unsuccessfully.
2430          */
2431         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2432                                    time_event_response,
2433                                    ARRAY_SIZE(time_event_response),
2434                                    iwl_mvm_rx_aux_roc, te_data);
2435
2436         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2437                                    &aux_roc_req);
2438
2439         if (res) {
2440                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2441                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2442                 goto out_clear_te;
2443         }
2444
2445         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2446         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2447         /* should never fail */
2448         WARN_ON_ONCE(res);
2449
2450         if (res) {
2451  out_clear_te:
2452                 spin_lock_bh(&mvm->time_event_lock);
2453                 iwl_mvm_te_clear_data(mvm, te_data);
2454                 spin_unlock_bh(&mvm->time_event_lock);
2455         }
2456
2457         return res;
2458 }
2459
2460 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2461                        struct ieee80211_vif *vif,
2462                        struct ieee80211_channel *channel,
2463                        int duration,
2464                        enum ieee80211_roc_type type)
2465 {
2466         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2467         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2468         struct cfg80211_chan_def chandef;
2469         struct iwl_mvm_phy_ctxt *phy_ctxt;
2470         int ret, i;
2471
2472         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2473                            duration, type);
2474
2475         switch (vif->type) {
2476         case NL80211_IFTYPE_STATION:
2477                 /* Use aux roc framework (HS20) */
2478                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2479                                                vif, duration);
2480                 return ret;
2481         case NL80211_IFTYPE_P2P_DEVICE:
2482                 /* handle below */
2483                 break;
2484         default:
2485                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2486                 return -EINVAL;
2487         }
2488
2489         mutex_lock(&mvm->mutex);
2490
2491         for (i = 0; i < NUM_PHY_CTX; i++) {
2492                 phy_ctxt = &mvm->phy_ctxts[i];
2493                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2494                         continue;
2495
2496                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2497                         /*
2498                          * Unbind the P2P_DEVICE from the current PHY context,
2499                          * and if the PHY context is not used remove it.
2500                          */
2501                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2502                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2503                                 goto out_unlock;
2504
2505                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2506
2507                         /* Bind the P2P_DEVICE to the current PHY Context */
2508                         mvmvif->phy_ctxt = phy_ctxt;
2509
2510                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2511                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2512                                 goto out_unlock;
2513
2514                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2515                         goto schedule_time_event;
2516                 }
2517         }
2518
2519         /* Need to update the PHY context only if the ROC channel changed */
2520         if (channel == mvmvif->phy_ctxt->channel)
2521                 goto schedule_time_event;
2522
2523         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2524
2525         /*
2526          * Change the PHY context configuration as it is currently referenced
2527          * only by the P2P Device MAC
2528          */
2529         if (mvmvif->phy_ctxt->ref == 1) {
2530                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2531                                                &chandef, 1, 1);
2532                 if (ret)
2533                         goto out_unlock;
2534         } else {
2535                 /*
2536                  * The PHY context is shared with other MACs. Need to remove the
2537                  * P2P Device from the binding, allocate an new PHY context and
2538                  * create a new binding
2539                  */
2540                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2541                 if (!phy_ctxt) {
2542                         ret = -ENOSPC;
2543                         goto out_unlock;
2544                 }
2545
2546                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2547                                                1, 1);
2548                 if (ret) {
2549                         IWL_ERR(mvm, "Failed to change PHY context\n");
2550                         goto out_unlock;
2551                 }
2552
2553                 /* Unbind the P2P_DEVICE from the current PHY context */
2554                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2555                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2556                         goto out_unlock;
2557
2558                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2559
2560                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2561                 mvmvif->phy_ctxt = phy_ctxt;
2562
2563                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2564                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2565                         goto out_unlock;
2566
2567                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2568         }
2569
2570 schedule_time_event:
2571         /* Schedule the time events */
2572         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2573
2574 out_unlock:
2575         mutex_unlock(&mvm->mutex);
2576         IWL_DEBUG_MAC80211(mvm, "leave\n");
2577         return ret;
2578 }
2579
2580 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2581 {
2582         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2583
2584         IWL_DEBUG_MAC80211(mvm, "enter\n");
2585
2586         mutex_lock(&mvm->mutex);
2587         iwl_mvm_stop_p2p_roc(mvm);
2588         mutex_unlock(&mvm->mutex);
2589
2590         IWL_DEBUG_MAC80211(mvm, "leave\n");
2591         return 0;
2592 }
2593
2594 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2595                                  struct ieee80211_chanctx_conf *ctx)
2596 {
2597         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2598         struct iwl_mvm_phy_ctxt *phy_ctxt;
2599         int ret;
2600
2601         lockdep_assert_held(&mvm->mutex);
2602
2603         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2604
2605         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2606         if (!phy_ctxt) {
2607                 ret = -ENOSPC;
2608                 goto out;
2609         }
2610
2611         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2612                                        ctx->rx_chains_static,
2613                                        ctx->rx_chains_dynamic);
2614         if (ret) {
2615                 IWL_ERR(mvm, "Failed to add PHY context\n");
2616                 goto out;
2617         }
2618
2619         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2620         *phy_ctxt_id = phy_ctxt->id;
2621 out:
2622         return ret;
2623 }
2624
2625 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2626                                struct ieee80211_chanctx_conf *ctx)
2627 {
2628         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2629         int ret;
2630
2631         mutex_lock(&mvm->mutex);
2632         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2633         mutex_unlock(&mvm->mutex);
2634
2635         return ret;
2636 }
2637
2638 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2639                                      struct ieee80211_chanctx_conf *ctx)
2640 {
2641         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2642         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2643
2644         lockdep_assert_held(&mvm->mutex);
2645
2646         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2647 }
2648
2649 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2650                                    struct ieee80211_chanctx_conf *ctx)
2651 {
2652         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2653
2654         mutex_lock(&mvm->mutex);
2655         __iwl_mvm_remove_chanctx(mvm, ctx);
2656         mutex_unlock(&mvm->mutex);
2657 }
2658
2659 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2660                                    struct ieee80211_chanctx_conf *ctx,
2661                                    u32 changed)
2662 {
2663         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2664         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2665         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2666
2667         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2668                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2669                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2670                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2671                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2672                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2673                       phy_ctxt->ref, changed))
2674                 return;
2675
2676         mutex_lock(&mvm->mutex);
2677         iwl_mvm_bt_coex_vif_change(mvm);
2678         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2679                                  ctx->rx_chains_static,
2680                                  ctx->rx_chains_dynamic);
2681         mutex_unlock(&mvm->mutex);
2682 }
2683
2684 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2685                                         struct ieee80211_vif *vif,
2686                                         struct ieee80211_chanctx_conf *ctx,
2687                                         bool switching_chanctx)
2688 {
2689         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2690         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2691         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2692         int ret;
2693
2694         lockdep_assert_held(&mvm->mutex);
2695
2696         mvmvif->phy_ctxt = phy_ctxt;
2697
2698         switch (vif->type) {
2699         case NL80211_IFTYPE_AP:
2700                 /* Unless it's a CSA flow we have nothing to do here */
2701                 if (vif->csa_active) {
2702                         mvmvif->ap_ibss_active = true;
2703                         break;
2704                 }
2705         case NL80211_IFTYPE_ADHOC:
2706                 /*
2707                  * The AP binding flow is handled as part of the start_ap flow
2708                  * (in bss_info_changed), similarly for IBSS.
2709                  */
2710                 ret = 0;
2711                 goto out;
2712         case NL80211_IFTYPE_STATION:
2713                 break;
2714         case NL80211_IFTYPE_MONITOR:
2715                 /* always disable PS when a monitor interface is active */
2716                 mvmvif->ps_disabled = true;
2717                 break;
2718         default:
2719                 ret = -EINVAL;
2720                 goto out;
2721         }
2722
2723         ret = iwl_mvm_binding_add_vif(mvm, vif);
2724         if (ret)
2725                 goto out;
2726
2727         /*
2728          * Power state must be updated before quotas,
2729          * otherwise fw will complain.
2730          */
2731         iwl_mvm_power_update_mac(mvm);
2732
2733         /* Setting the quota at this stage is only required for monitor
2734          * interfaces. For the other types, the bss_info changed flow
2735          * will handle quota settings.
2736          */
2737         if (vif->type == NL80211_IFTYPE_MONITOR) {
2738                 mvmvif->monitor_active = true;
2739                 ret = iwl_mvm_update_quotas(mvm, NULL);
2740                 if (ret)
2741                         goto out_remove_binding;
2742         }
2743
2744         /* Handle binding during CSA */
2745         if ((vif->type == NL80211_IFTYPE_AP) ||
2746             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2747                 iwl_mvm_update_quotas(mvm, NULL);
2748                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2749         }
2750
2751         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2752                 struct iwl_mvm_sta *mvmsta;
2753
2754                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2755                                                           mvmvif->ap_sta_id);
2756
2757                 if (WARN_ON(!mvmsta))
2758                         goto out;
2759
2760                 /* TODO: only re-enable after the first beacon */
2761                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2762         }
2763
2764         goto out;
2765
2766 out_remove_binding:
2767         iwl_mvm_binding_remove_vif(mvm, vif);
2768         iwl_mvm_power_update_mac(mvm);
2769 out:
2770         if (ret)
2771                 mvmvif->phy_ctxt = NULL;
2772         return ret;
2773 }
2774 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2775                                       struct ieee80211_vif *vif,
2776                                       struct ieee80211_chanctx_conf *ctx)
2777 {
2778         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2779         int ret;
2780
2781         mutex_lock(&mvm->mutex);
2782         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2783         mutex_unlock(&mvm->mutex);
2784
2785         return ret;
2786 }
2787
2788 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2789                                            struct ieee80211_vif *vif,
2790                                            struct ieee80211_chanctx_conf *ctx,
2791                                            bool switching_chanctx)
2792 {
2793         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2794         struct ieee80211_vif *disabled_vif = NULL;
2795         struct iwl_mvm_sta *mvmsta;
2796
2797         lockdep_assert_held(&mvm->mutex);
2798
2799         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2800
2801         switch (vif->type) {
2802         case NL80211_IFTYPE_ADHOC:
2803                 goto out;
2804         case NL80211_IFTYPE_MONITOR:
2805                 mvmvif->monitor_active = false;
2806                 mvmvif->ps_disabled = false;
2807                 break;
2808         case NL80211_IFTYPE_AP:
2809                 /* This part is triggered only during CSA */
2810                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2811                         goto out;
2812
2813                 /* Set CS bit on all the stations */
2814                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2815
2816                 /* Save blocked iface, the timeout is set on the next beacon */
2817                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2818
2819                 mvmvif->ap_ibss_active = false;
2820                 break;
2821         case NL80211_IFTYPE_STATION:
2822                 if (!switching_chanctx)
2823                         break;
2824
2825                 disabled_vif = vif;
2826
2827                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2828                                                           mvmvif->ap_sta_id);
2829
2830                 if (!WARN_ON(!mvmsta))
2831                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2832
2833                 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2834                 break;
2835         default:
2836                 break;
2837         }
2838
2839         iwl_mvm_update_quotas(mvm, disabled_vif);
2840         iwl_mvm_binding_remove_vif(mvm, vif);
2841
2842 out:
2843         mvmvif->phy_ctxt = NULL;
2844         iwl_mvm_power_update_mac(mvm);
2845 }
2846
2847 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2848                                          struct ieee80211_vif *vif,
2849                                          struct ieee80211_chanctx_conf *ctx)
2850 {
2851         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2852
2853         mutex_lock(&mvm->mutex);
2854         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2855         mutex_unlock(&mvm->mutex);
2856 }
2857
2858 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2859                                       struct ieee80211_vif_chanctx_switch *vifs,
2860                                       int n_vifs,
2861                                       enum ieee80211_chanctx_switch_mode mode)
2862 {
2863         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2864         int ret;
2865
2866         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2867         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2868                 return -EOPNOTSUPP;
2869
2870         mutex_lock(&mvm->mutex);
2871         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2872         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2873
2874         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2875         if (ret) {
2876                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2877                 goto out_reassign;
2878         }
2879
2880         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2881                                            true);
2882         if (ret) {
2883                 IWL_ERR(mvm,
2884                         "failed to assign new_ctx during channel switch\n");
2885                 goto out_remove;
2886         }
2887
2888         /* we don't support TDLS during DCM - can be caused by channel switch */
2889         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2890                 iwl_mvm_teardown_tdls_peers(mvm);
2891
2892         goto out;
2893
2894 out_remove:
2895         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2896
2897 out_reassign:
2898         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2899         if (ret) {
2900                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2901                 goto out_restart;
2902         }
2903
2904         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2905                                            true);
2906         if (ret) {
2907                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2908                 goto out_restart;
2909         }
2910
2911         goto out;
2912
2913 out_restart:
2914         /* things keep failing, better restart the hw */
2915         iwl_mvm_nic_restart(mvm, false);
2916
2917 out:
2918         mutex_unlock(&mvm->mutex);
2919         return ret;
2920 }
2921
2922 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2923                            struct ieee80211_sta *sta,
2924                            bool set)
2925 {
2926         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2927         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2928
2929         if (!mvm_sta || !mvm_sta->vif) {
2930                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2931                 return -EINVAL;
2932         }
2933
2934         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2935 }
2936
2937 #ifdef CONFIG_NL80211_TESTMODE
2938 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2939         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2940         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2941         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2942 };
2943
2944 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2945                                       struct ieee80211_vif *vif,
2946                                       void *data, int len)
2947 {
2948         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2949         int err;
2950         u32 noa_duration;
2951
2952         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2953         if (err)
2954                 return err;
2955
2956         if (!tb[IWL_MVM_TM_ATTR_CMD])
2957                 return -EINVAL;
2958
2959         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2960         case IWL_MVM_TM_CMD_SET_NOA:
2961                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2962                     !vif->bss_conf.enable_beacon ||
2963                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2964                         return -EINVAL;
2965
2966                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2967                 if (noa_duration >= vif->bss_conf.beacon_int)
2968                         return -EINVAL;
2969
2970                 mvm->noa_duration = noa_duration;
2971                 mvm->noa_vif = vif;
2972
2973                 return iwl_mvm_update_quotas(mvm, NULL);
2974         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2975                 /* must be associated client vif - ignore authorized */
2976                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2977                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2978                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2979                         return -EINVAL;
2980
2981                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2982                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2983                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2984         }
2985
2986         return -EOPNOTSUPP;
2987 }
2988
2989 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2990                                     struct ieee80211_vif *vif,
2991                                     void *data, int len)
2992 {
2993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2994         int err;
2995
2996         mutex_lock(&mvm->mutex);
2997         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2998         mutex_unlock(&mvm->mutex);
2999
3000         return err;
3001 }
3002 #endif
3003
3004 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3005                                           struct ieee80211_vif *vif,
3006                                           struct cfg80211_chan_def *chandef)
3007 {
3008         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3009         struct ieee80211_vif *csa_vif;
3010
3011         mutex_lock(&mvm->mutex);
3012
3013         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3014                                             lockdep_is_held(&mvm->mutex));
3015         if (WARN(csa_vif && csa_vif->csa_active,
3016                  "Another CSA is already in progress"))
3017                 goto out_unlock;
3018
3019         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3020                            chandef->center_freq1);
3021         rcu_assign_pointer(mvm->csa_vif, vif);
3022
3023 out_unlock:
3024         mutex_unlock(&mvm->mutex);
3025 }
3026
3027 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3028                               struct ieee80211_vif *vif, u32 queues, bool drop)
3029 {
3030         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3031         struct iwl_mvm_vif *mvmvif;
3032         struct iwl_mvm_sta *mvmsta;
3033
3034         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3035                 return;
3036
3037         mutex_lock(&mvm->mutex);
3038         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3039         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3040
3041         if (WARN_ON_ONCE(!mvmsta))
3042                 goto done;
3043
3044         if (drop) {
3045                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3046                         IWL_ERR(mvm, "flush request fail\n");
3047         } else {
3048                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3049                                               mvmsta->tfd_queue_msk);
3050         }
3051 done:
3052         mutex_unlock(&mvm->mutex);
3053 }
3054
3055 const struct ieee80211_ops iwl_mvm_hw_ops = {
3056         .tx = iwl_mvm_mac_tx,
3057         .ampdu_action = iwl_mvm_mac_ampdu_action,
3058         .start = iwl_mvm_mac_start,
3059         .restart_complete = iwl_mvm_mac_restart_complete,
3060         .stop = iwl_mvm_mac_stop,
3061         .add_interface = iwl_mvm_mac_add_interface,
3062         .remove_interface = iwl_mvm_mac_remove_interface,
3063         .config = iwl_mvm_mac_config,
3064         .prepare_multicast = iwl_mvm_prepare_multicast,
3065         .configure_filter = iwl_mvm_configure_filter,
3066         .bss_info_changed = iwl_mvm_bss_info_changed,
3067         .hw_scan = iwl_mvm_mac_hw_scan,
3068         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3069         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3070         .sta_state = iwl_mvm_mac_sta_state,
3071         .sta_notify = iwl_mvm_mac_sta_notify,
3072         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3073         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3074         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3075         .sta_rc_update = iwl_mvm_sta_rc_update,
3076         .conf_tx = iwl_mvm_mac_conf_tx,
3077         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3078         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3079         .flush = iwl_mvm_mac_flush,
3080         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3081         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3082         .set_key = iwl_mvm_mac_set_key,
3083         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3084         .remain_on_channel = iwl_mvm_roc,
3085         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3086         .add_chanctx = iwl_mvm_add_chanctx,
3087         .remove_chanctx = iwl_mvm_remove_chanctx,
3088         .change_chanctx = iwl_mvm_change_chanctx,
3089         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3090         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3091         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3092
3093         .start_ap = iwl_mvm_start_ap_ibss,
3094         .stop_ap = iwl_mvm_stop_ap_ibss,
3095         .join_ibss = iwl_mvm_start_ap_ibss,
3096         .leave_ibss = iwl_mvm_stop_ap_ibss,
3097
3098         .set_tim = iwl_mvm_set_tim,
3099
3100         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3101
3102         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3103
3104 #ifdef CONFIG_PM_SLEEP
3105         /* look at d3.c */
3106         .suspend = iwl_mvm_suspend,
3107         .resume = iwl_mvm_resume,
3108         .set_wakeup = iwl_mvm_set_wakeup,
3109         .set_rekey_data = iwl_mvm_set_rekey_data,
3110 #if IS_ENABLED(CONFIG_IPV6)
3111         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3112 #endif
3113         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3114 #endif
3115 };