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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  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
  36  * All rights reserved.
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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 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 283 {
 284         struct ieee80211_hw *hw = mvm->hw;
 285         int num_mac, ret, i;
 286
 287         /* Tell mac80211 our characteristics */
 288         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 289                     IEEE80211_HW_SPECTRUM_MGMT |
 290                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 291                     IEEE80211_HW_QUEUE_CONTROL |
 292                     IEEE80211_HW_WANT_MONITOR_VIF |
 293                     IEEE80211_HW_SUPPORTS_PS |
 294                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 295                     IEEE80211_HW_AMPDU_AGGREGATION |
 296                     IEEE80211_HW_TIMING_BEACON_ONLY |
 297                     IEEE80211_HW_CONNECTION_MONITOR |
 298                     IEEE80211_HW_CHANCTX_STA_CSA |
 299                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 300
 301         hw->queues = mvm->first_agg_queue;
 302         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 303         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 304                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 305         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 306         hw->rate_control_algorithm = "iwl-mvm-rs";
 307
 308         /*
 309          * Enable 11w if advertised by firmware and software crypto
 310          * is not enabled (as the firmware will interpret some mgmt
 311          * packets, so enabling it with software crypto isn't safe)
 312          */
 313         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 314             !iwlwifi_mod_params.sw_crypto)
 315                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 316
 317         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 318             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 319             !iwlwifi_mod_params.uapsd_disable) {
 320                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 321                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 322                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 323         }
 324
 325         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 326                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 327
 328         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 329         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 330         hw->chanctx_data_size = sizeof(u16);
 331
 332         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 333                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 334                 BIT(NL80211_IFTYPE_AP) |
 335                 BIT(NL80211_IFTYPE_P2P_GO) |
 336                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 337                 BIT(NL80211_IFTYPE_ADHOC);
 338
 339         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 340         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 341                                        REGULATORY_DISABLE_BEACON_HINTS;
 342
 343         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 344                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 345
 346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 347                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 348
 349         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 350         hw->wiphy->n_iface_combinations =
 351                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 352
 353         hw->wiphy->max_remain_on_channel_duration = 10000;
 354         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 355
 356         /* Extract MAC address */
 357         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 358         hw->wiphy->addresses = mvm->addresses;
 359         hw->wiphy->n_addresses = 1;
 360
 361         /* Extract additional MAC addresses if available */
 362         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 363                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 364
 365         for (i = 1; i < num_mac; i++) {
 366                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 367                        ETH_ALEN);
 368                 mvm->addresses[i].addr[5]++;
 369                 hw->wiphy->n_addresses++;
 370         }
 371
 372         iwl_mvm_reset_phy_ctxts(mvm);
 373
 374         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 375
 376         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 377
 378         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 379                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 380                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 381         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 382                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 383                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 384
 385         hw->wiphy->hw_version = mvm->trans->hw_id;
 386
 387         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 388                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 389         else
 390                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 391
 392         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 393                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 394                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 395                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 396                 /* we create the 802.11 header and zero length SSID IE. */
 397                 hw->wiphy->max_sched_scan_ie_len =
 398                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 399         }
 400
 401         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 402                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 403                                NL80211_FEATURE_P2P_GO_OPPPS |
 404                                NL80211_FEATURE_DYNAMIC_SMPS |
 405                                NL80211_FEATURE_STATIC_SMPS;
 406
 407         if (mvm->fw->ucode_capa.capa[0] &
 408             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 409                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 410         if (mvm->fw->ucode_capa.capa[0] &
 411             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 412                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 413
 414         if (mvm->fw->ucode_capa.capa[0] &
 415             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 416                 hw->wiphy->features |=
 417                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 418
 419         if (mvm->fw->ucode_capa.capa[0] &
 420             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 421                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 422
 423         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 424
 425         /* currently FW API supports only one optional cipher scheme */
 426         if (mvm->fw->cs[0].cipher) {
 427                 mvm->hw->n_cipher_schemes = 1;
 428                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 429         }
 430
 431 #ifdef CONFIG_PM_SLEEP
 432         if (iwl_mvm_is_d0i3_supported(mvm) &&
 433             device_can_wakeup(mvm->trans->dev)) {
 434                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 435                 hw->wiphy->wowlan = &mvm->wowlan;
 436         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 437             mvm->trans->ops->d3_suspend &&
 438             mvm->trans->ops->d3_resume &&
 439             device_can_wakeup(mvm->trans->dev)) {
 440                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 441                                     WIPHY_WOWLAN_DISCONNECT |
 442                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 443                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 444                 if (!iwlwifi_mod_params.sw_crypto)
 445                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 446                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 447                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 448
 449                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 450                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 451                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 452                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 453                 hw->wiphy->wowlan = &mvm->wowlan;
 454         }
 455 #endif
 456
 457 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 458         /* assign default bcast filtering configuration */
 459         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 460 #endif
 461
 462         ret = iwl_mvm_leds_init(mvm);
 463         if (ret)
 464                 return ret;
 465
 466         ret = ieee80211_register_hw(mvm->hw);
 467         if (ret)
 468                 iwl_mvm_leds_exit(mvm);
 469
 470         return ret;
 471 }
 472
 473 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 474                              struct ieee80211_sta *sta,
 475                              struct sk_buff *skb)
 476 {
 477         struct iwl_mvm_sta *mvmsta;
 478         bool defer = false;
 479
 480         /*
 481          * double check the IN_D0I3 flag both before and after
 482          * taking the spinlock, in order to prevent taking
 483          * the spinlock when not needed.
 484          */
 485         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 486                 return false;
 487
 488         spin_lock(&mvm->d0i3_tx_lock);
 489         /*
 490          * testing the flag again ensures the skb dequeue
 491          * loop (on d0i3 exit) hasn't run yet.
 492          */
 493         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 494                 goto out;
 495
 496         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 497         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 498             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 499                 goto out;
 500
 501         __skb_queue_tail(&mvm->d0i3_tx, skb);
 502         ieee80211_stop_queues(mvm->hw);
 503
 504         /* trigger wakeup */
 505         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 506         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 507
 508         defer = true;
 509 out:
 510         spin_unlock(&mvm->d0i3_tx_lock);
 511         return defer;
 512 }
 513
 514 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 515                            struct ieee80211_tx_control *control,
 516                            struct sk_buff *skb)
 517 {
 518         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 519         struct ieee80211_sta *sta = control->sta;
 520         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 521         struct ieee80211_hdr *hdr = (void *)skb->data;
 522
 523         if (iwl_mvm_is_radio_killed(mvm)) {
 524                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 525                 goto drop;
 526         }
 527
 528         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 529             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 530             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 531                 goto drop;
 532
 533         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 534         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 535                      ieee80211_is_mgmt(hdr->frame_control) &&
 536                      !ieee80211_is_deauth(hdr->frame_control) &&
 537                      !ieee80211_is_disassoc(hdr->frame_control) &&
 538                      !ieee80211_is_action(hdr->frame_control)))
 539                 sta = NULL;
 540
 541         if (sta) {
 542                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 543                         return;
 544                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 545                         goto drop;
 546                 return;
 547         }
 548
 549         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 550                 goto drop;
 551         return;
 552  drop:
 553         ieee80211_free_txskb(hw, skb);
 554 }
 555
 556 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 557 {
 558         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 559                 return false;
 560         return true;
 561 }
 562
 563 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 564 {
 565         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 566                 return false;
 567         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 568                 return true;
 569
 570         /* enabled by default */
 571         return true;
 572 }
 573
 574 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 575                                     struct ieee80211_vif *vif,
 576                                     enum ieee80211_ampdu_mlme_action action,
 577                                     struct ieee80211_sta *sta, u16 tid,
 578                                     u16 *ssn, u8 buf_size)
 579 {
 580         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 581         int ret;
 582         bool tx_agg_ref = false;
 583
 584         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 585                      sta->addr, tid, action);
 586
 587         if (!(mvm->nvm_data->sku_cap_11n_enable))
 588                 return -EACCES;
 589
 590         /* return from D0i3 before starting a new Tx aggregation */
 591         switch (action) {
 592         case IEEE80211_AMPDU_TX_START:
 593         case IEEE80211_AMPDU_TX_STOP_CONT:
 594         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 595         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 596         case IEEE80211_AMPDU_TX_OPERATIONAL:
 597                 /*
 598                  * for tx start, wait synchronously until D0i3 exit to
 599                  * get the correct sequence number for the tid.
 600                  * additionally, some other ampdu actions use direct
 601                  * target access, which is not handled automatically
 602                  * by the trans layer (unlike commands), so wait for
 603                  * d0i3 exit in these cases as well.
 604                  */
 605                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 606                 if (ret)
 607                         return ret;
 608
 609                 tx_agg_ref = true;
 610                 break;
 611         default:
 612                 break;
 613         }
 614
 615         mutex_lock(&mvm->mutex);
 616
 617         switch (action) {
 618         case IEEE80211_AMPDU_RX_START:
 619                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 620                         ret = -EINVAL;
 621                         break;
 622                 }
 623                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 624                 break;
 625         case IEEE80211_AMPDU_RX_STOP:
 626                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 627                 break;
 628         case IEEE80211_AMPDU_TX_START:
 629                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 630                         ret = -EINVAL;
 631                         break;
 632                 }
 633                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 634                 break;
 635         case IEEE80211_AMPDU_TX_STOP_CONT:
 636                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 637                 break;
 638         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 639         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 640                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 641                 break;
 642         case IEEE80211_AMPDU_TX_OPERATIONAL:
 643                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 644                 break;
 645         default:
 646                 WARN_ON_ONCE(1);
 647                 ret = -EINVAL;
 648                 break;
 649         }
 650         mutex_unlock(&mvm->mutex);
 651
 652         /*
 653          * If the tid is marked as started, we won't use it for offloaded
 654          * traffic on the next D0i3 entry. It's safe to unref.
 655          */
 656         if (tx_agg_ref)
 657                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 658
 659         return ret;
 660 }
 661
 662 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 663                                      struct ieee80211_vif *vif)
 664 {
 665         struct iwl_mvm *mvm = data;
 666         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 667
 668         mvmvif->uploaded = false;
 669         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 670
 671         /* does this make sense at all? */
 672         mvmvif->color++;
 673
 674         spin_lock_bh(&mvm->time_event_lock);
 675         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 676         spin_unlock_bh(&mvm->time_event_lock);
 677
 678         mvmvif->phy_ctxt = NULL;
 679         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 680 }
 681
 682 #ifdef CONFIG_IWLWIFI_DEBUGFS
 683 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 684 {
 685         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 686         struct iwl_fw_error_dump_file *dump_file;
 687         struct iwl_fw_error_dump_data *dump_data;
 688         struct iwl_fw_error_dump_info *dump_info;
 689         struct iwl_mvm_dump_ptrs *fw_error_dump;
 690         const struct fw_img *img;
 691         u32 sram_len, sram_ofs;
 692         u32 file_len, rxf_len;
 693         unsigned long flags;
 694         int reg_val;
 695
 696         lockdep_assert_held(&mvm->mutex);
 697
 698         if (mvm->fw_error_dump)
 699                 return;
 700
 701         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 702         if (!fw_error_dump)
 703                 return;
 704
 705         img = &mvm->fw->img[mvm->cur_ucode];
 706         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 707         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 708
 709         /* reading buffer size */
 710         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 711         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 712
 713         /* the register holds the value divided by 128 */
 714         rxf_len = rxf_len << 7;
 715
 716         file_len = sizeof(*dump_file) +
 717                    sizeof(*dump_data) * 3 +
 718                    sram_len +
 719                    rxf_len +
 720                    sizeof(*dump_info);
 721
 722         dump_file = vzalloc(file_len);
 723         if (!dump_file) {
 724                 kfree(fw_error_dump);
 725                 return;
 726         }
 727
 728         fw_error_dump->op_mode_ptr = dump_file;
 729
 730         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 731         dump_data = (void *)dump_file->data;
 732
 733         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 734         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 735         dump_info = (void *) dump_data->data;
 736         dump_info->device_family =
 737                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 738                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 739                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 740         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 741                sizeof(dump_info->fw_human_readable));
 742         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 743                 sizeof(dump_info->dev_human_readable));
 744         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 745                 sizeof(dump_info->bus_human_readable));
 746
 747         dump_data = iwl_fw_error_next_data(dump_data);
 748         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 749         dump_data->len = cpu_to_le32(rxf_len);
 750
 751         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 752                 u32 *rxf = (void *)dump_data->data;
 753                 int i;
 754
 755                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 756                         iwl_trans_write_prph(mvm->trans,
 757                                              RXF_LD_FENCE_OFFSET_ADDR,
 758                                              i * sizeof(u32));
 759                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 760                                                      RXF_FIFO_RD_FENCE_ADDR);
 761                 }
 762                 iwl_trans_release_nic_access(mvm->trans, &flags);
 763         }
 764
 765         dump_data = iwl_fw_error_next_data(dump_data);
 766         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 767         dump_data->len = cpu_to_le32(sram_len);
 768         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 769                                  sram_len);
 770
 771         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 772         fw_error_dump->op_mode_len = file_len;
 773         if (fw_error_dump->trans_ptr)
 774                 file_len += fw_error_dump->trans_ptr->len;
 775         dump_file->file_len = cpu_to_le32(file_len);
 776         mvm->fw_error_dump = fw_error_dump;
 777
 778         /* notify the userspace about the error we had */
 779         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 780 }
 781 #endif
 782
 783 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 784 {
 785         iwl_mvm_fw_error_dump(mvm);
 786
 787         iwl_trans_stop_device(mvm->trans);
 788
 789         mvm->scan_status = IWL_MVM_SCAN_NONE;
 790         mvm->ps_disabled = false;
 791         mvm->calibrating = false;
 792
 793         /* just in case one was running */
 794         ieee80211_remain_on_channel_expired(mvm->hw);
 795
 796         ieee80211_iterate_active_interfaces_atomic(
 797                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 798                 iwl_mvm_cleanup_iterator, mvm);
 799
 800         mvm->p2p_device_vif = NULL;
 801         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 802
 803         iwl_mvm_reset_phy_ctxts(mvm);
 804         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 805         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 806         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 807         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 808         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 809         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 810         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 811         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 812
 813         ieee80211_wake_queues(mvm->hw);
 814
 815         /* cleanup all stale references (scan, roc), but keep the
 816          * ucode_down ref until reconfig is complete */
 817         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 818
 819         /* clear any stale d0i3 state */
 820         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 821
 822         mvm->vif_count = 0;
 823         mvm->rx_ba_sessions = 0;
 824 }
 825
 826 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 827 {
 828         int ret;
 829
 830         lockdep_assert_held(&mvm->mutex);
 831
 832         /* Clean up some internal and mac80211 state on restart */
 833         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 834                 iwl_mvm_restart_cleanup(mvm);
 835
 836         ret = iwl_mvm_up(mvm);
 837
 838         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 839                 /* Something went wrong - we need to finish some cleanup
 840                  * that normally iwl_mvm_mac_restart_complete() below
 841                  * would do.
 842                  */
 843                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 844                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 845         }
 846
 847         return ret;
 848 }
 849
 850 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 851 {
 852         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 853         int ret;
 854
 855         mutex_lock(&mvm->mutex);
 856         ret = __iwl_mvm_mac_start(mvm);
 857         mutex_unlock(&mvm->mutex);
 858
 859         return ret;
 860 }
 861
 862 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 863 {
 864         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 865         int ret;
 866
 867         mutex_lock(&mvm->mutex);
 868
 869         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 870         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 871         ret = iwl_mvm_update_quotas(mvm, NULL);
 872         if (ret)
 873                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 874                         ret);
 875
 876         /* allow transport/FW low power modes */
 877         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 878
 879         mutex_unlock(&mvm->mutex);
 880 }
 881
 882 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 883 {
 884         lockdep_assert_held(&mvm->mutex);
 885
 886         /* disallow low power states when the FW is down */
 887         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 888
 889         /* async_handlers_wk is now blocked */
 890
 891         /*
 892          * The work item could be running or queued if the
 893          * ROC time event stops just as we get here.
 894          */
 895         cancel_work_sync(&mvm->roc_done_wk);
 896
 897         iwl_trans_stop_device(mvm->trans);
 898
 899         iwl_mvm_async_handlers_purge(mvm);
 900         /* async_handlers_list is empty and will stay empty: HW is stopped */
 901
 902         /* the fw is stopped, the aux sta is dead: clean up driver state */
 903         iwl_mvm_del_aux_sta(mvm);
 904
 905         mvm->ucode_loaded = false;
 906 }
 907
 908 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 909 {
 910         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 911
 912         flush_work(&mvm->d0i3_exit_work);
 913         flush_work(&mvm->async_handlers_wk);
 914         flush_work(&mvm->fw_error_dump_wk);
 915
 916         mutex_lock(&mvm->mutex);
 917         __iwl_mvm_mac_stop(mvm);
 918         mutex_unlock(&mvm->mutex);
 919
 920         /*
 921          * The worker might have been waiting for the mutex, let it run and
 922          * discover that its list is now empty.
 923          */
 924         cancel_work_sync(&mvm->async_handlers_wk);
 925 }
 926
 927 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 928 {
 929         u16 i;
 930
 931         lockdep_assert_held(&mvm->mutex);
 932
 933         for (i = 0; i < NUM_PHY_CTX; i++)
 934                 if (!mvm->phy_ctxts[i].ref)
 935                         return &mvm->phy_ctxts[i];
 936
 937         IWL_ERR(mvm, "No available PHY context\n");
 938         return NULL;
 939 }
 940
 941 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 942                                 s8 tx_power)
 943 {
 944         /* FW is in charge of regulatory enforcement */
 945         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 946                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 947                 .pwr_restriction = cpu_to_le16(tx_power),
 948         };
 949
 950         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 951                                     sizeof(reduce_txpwr_cmd),
 952                                     &reduce_txpwr_cmd);
 953 }
 954
 955 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 956                                      struct ieee80211_vif *vif)
 957 {
 958         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 959         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 960         int ret;
 961
 962         /*
 963          * make sure D0i3 exit is completed, otherwise a target access
 964          * during tx queue configuration could be done when still in
 965          * D0i3 state.
 966          */
 967         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 968         if (ret)
 969                 return ret;
 970
 971         /*
 972          * Not much to do here. The stack will not allow interface
 973          * types or combinations that we didn't advertise, so we
 974          * don't really have to check the types.
 975          */
 976
 977         mutex_lock(&mvm->mutex);
 978
 979         /* Allocate resources for the MAC context, and add it to the fw  */
 980         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 981         if (ret)
 982                 goto out_unlock;
 983
 984         /* Counting number of interfaces is needed for legacy PM */
 985         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 986                 mvm->vif_count++;
 987
 988         /*
 989          * The AP binding flow can be done only after the beacon
 990          * template is configured (which happens only in the mac80211
 991          * start_ap() flow), and adding the broadcast station can happen
 992          * only after the binding.
 993          * In addition, since modifying the MAC before adding a bcast
 994          * station is not allowed by the FW, delay the adding of MAC context to
 995          * the point where we can also add the bcast station.
 996          * In short: there's not much we can do at this point, other than
 997          * allocating resources :)
 998          */
 999         if (vif->type == NL80211_IFTYPE_AP ||
1000             vif->type == NL80211_IFTYPE_ADHOC) {
1001                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1002                 if (ret) {
1003                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1004                         goto out_release;
1005                 }
1006
1007                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1008                 goto out_unlock;
1009         }
1010
1011         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1012         if (ret)
1013                 goto out_release;
1014
1015         ret = iwl_mvm_power_update_mac(mvm);
1016         if (ret)
1017                 goto out_release;
1018
1019         /* beacon filtering */
1020         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1021         if (ret)
1022                 goto out_remove_mac;
1023
1024         if (!mvm->bf_allowed_vif &&
1025             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1026                 mvm->bf_allowed_vif = mvmvif;
1027                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1028                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1029         }
1030
1031         /*
1032          * P2P_DEVICE interface does not have a channel context assigned to it,
1033          * so a dedicated PHY context is allocated to it and the corresponding
1034          * MAC context is bound to it at this stage.
1035          */
1036         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1037
1038                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1039                 if (!mvmvif->phy_ctxt) {
1040                         ret = -ENOSPC;
1041                         goto out_free_bf;
1042                 }
1043
1044                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1045                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1046                 if (ret)
1047                         goto out_unref_phy;
1048
1049                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1050                 if (ret)
1051                         goto out_unbind;
1052
1053                 /* Save a pointer to p2p device vif, so it can later be used to
1054                  * update the p2p device MAC when a GO is started/stopped */
1055                 mvm->p2p_device_vif = vif;
1056         }
1057
1058         iwl_mvm_vif_dbgfs_register(mvm, vif);
1059         goto out_unlock;
1060
1061  out_unbind:
1062         iwl_mvm_binding_remove_vif(mvm, vif);
1063  out_unref_phy:
1064         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1065  out_free_bf:
1066         if (mvm->bf_allowed_vif == mvmvif) {
1067                 mvm->bf_allowed_vif = NULL;
1068                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1069                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1070         }
1071  out_remove_mac:
1072         mvmvif->phy_ctxt = NULL;
1073         iwl_mvm_mac_ctxt_remove(mvm, vif);
1074  out_release:
1075         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1076                 mvm->vif_count--;
1077
1078         iwl_mvm_mac_ctxt_release(mvm, vif);
1079  out_unlock:
1080         mutex_unlock(&mvm->mutex);
1081
1082         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1083
1084         return ret;
1085 }
1086
1087 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1088                                         struct ieee80211_vif *vif)
1089 {
1090         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1091
1092         if (tfd_msk) {
1093                 mutex_lock(&mvm->mutex);
1094                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1095                 mutex_unlock(&mvm->mutex);
1096         }
1097
1098         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1099                 /*
1100                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1101                  * We assume here that all the packets sent to the OFFCHANNEL
1102                  * queue are sent in ROC session.
1103                  */
1104                 flush_work(&mvm->roc_done_wk);
1105         } else {
1106                 /*
1107                  * By now, all the AC queues are empty. The AGG queues are
1108                  * empty too. We already got all the Tx responses for all the
1109                  * packets in the queues. The drain work can have been
1110                  * triggered. Flush it.
1111                  */
1112                 flush_work(&mvm->sta_drained_wk);
1113         }
1114 }
1115
1116 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1117                                          struct ieee80211_vif *vif)
1118 {
1119         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1120         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1121
1122         iwl_mvm_prepare_mac_removal(mvm, vif);
1123
1124         mutex_lock(&mvm->mutex);
1125
1126         if (mvm->bf_allowed_vif == mvmvif) {
1127                 mvm->bf_allowed_vif = NULL;
1128                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1129                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1130         }
1131
1132         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1133
1134         /*
1135          * For AP/GO interface, the tear down of the resources allocated to the
1136          * interface is be handled as part of the stop_ap flow.
1137          */
1138         if (vif->type == NL80211_IFTYPE_AP ||
1139             vif->type == NL80211_IFTYPE_ADHOC) {
1140 #ifdef CONFIG_NL80211_TESTMODE
1141                 if (vif == mvm->noa_vif) {
1142                         mvm->noa_vif = NULL;
1143                         mvm->noa_duration = 0;
1144                 }
1145 #endif
1146                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1147                 goto out_release;
1148         }
1149
1150         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1151                 mvm->p2p_device_vif = NULL;
1152                 iwl_mvm_rm_bcast_sta(mvm, vif);
1153                 iwl_mvm_binding_remove_vif(mvm, vif);
1154                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1155                 mvmvif->phy_ctxt = NULL;
1156         }
1157
1158         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1159                 mvm->vif_count--;
1160
1161         iwl_mvm_power_update_mac(mvm);
1162         iwl_mvm_mac_ctxt_remove(mvm, vif);
1163
1164 out_release:
1165         iwl_mvm_mac_ctxt_release(mvm, vif);
1166         mutex_unlock(&mvm->mutex);
1167 }
1168
1169 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1170 {
1171         return 0;
1172 }
1173
1174 struct iwl_mvm_mc_iter_data {
1175         struct iwl_mvm *mvm;
1176         int port_id;
1177 };
1178
1179 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1180                                       struct ieee80211_vif *vif)
1181 {
1182         struct iwl_mvm_mc_iter_data *data = _data;
1183         struct iwl_mvm *mvm = data->mvm;
1184         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1185         int ret, len;
1186
1187         /* if we don't have free ports, mcast frames will be dropped */
1188         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1189                 return;
1190
1191         if (vif->type != NL80211_IFTYPE_STATION ||
1192             !vif->bss_conf.assoc)
1193                 return;
1194
1195         cmd->port_id = data->port_id++;
1196         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1197         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1198
1199         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1200         if (ret)
1201                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1202 }
1203
1204 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1205 {
1206         struct iwl_mvm_mc_iter_data iter_data = {
1207                 .mvm = mvm,
1208         };
1209
1210         lockdep_assert_held(&mvm->mutex);
1211
1212         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1213                 return;
1214
1215         ieee80211_iterate_active_interfaces_atomic(
1216                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1217                 iwl_mvm_mc_iface_iterator, &iter_data);
1218 }
1219
1220 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1221                                      struct netdev_hw_addr_list *mc_list)
1222 {
1223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1224         struct iwl_mcast_filter_cmd *cmd;
1225         struct netdev_hw_addr *addr;
1226         int addr_count;
1227         bool pass_all;
1228         int len;
1229
1230         addr_count = netdev_hw_addr_list_count(mc_list);
1231         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1232                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1233         if (pass_all)
1234                 addr_count = 0;
1235
1236         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1237         cmd = kzalloc(len, GFP_ATOMIC);
1238         if (!cmd)
1239                 return 0;
1240
1241         if (pass_all) {
1242                 cmd->pass_all = 1;
1243                 return (u64)(unsigned long)cmd;
1244         }
1245
1246         netdev_hw_addr_list_for_each(addr, mc_list) {
1247                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1248                                    cmd->count, addr->addr);
1249                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1250                        addr->addr, ETH_ALEN);
1251                 cmd->count++;
1252         }
1253
1254         return (u64)(unsigned long)cmd;
1255 }
1256
1257 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1258                                      unsigned int changed_flags,
1259                                      unsigned int *total_flags,
1260                                      u64 multicast)
1261 {
1262         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1263         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1264
1265         mutex_lock(&mvm->mutex);
1266
1267         /* replace previous configuration */
1268         kfree(mvm->mcast_filter_cmd);
1269         mvm->mcast_filter_cmd = cmd;
1270
1271         if (!cmd)
1272                 goto out;
1273
1274         iwl_mvm_recalc_multicast(mvm);
1275 out:
1276         mutex_unlock(&mvm->mutex);
1277         *total_flags = 0;
1278 }
1279
1280 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1281 struct iwl_bcast_iter_data {
1282         struct iwl_mvm *mvm;
1283         struct iwl_bcast_filter_cmd *cmd;
1284         u8 current_filter;
1285 };
1286
1287 static void
1288 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1289                          const struct iwl_fw_bcast_filter *in_filter,
1290                          struct iwl_fw_bcast_filter *out_filter)
1291 {
1292         struct iwl_fw_bcast_filter_attr *attr;
1293         int i;
1294
1295         memcpy(out_filter, in_filter, sizeof(*out_filter));
1296
1297         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1298                 attr = &out_filter->attrs[i];
1299
1300                 if (!attr->mask)
1301                         break;
1302
1303                 switch (attr->reserved1) {
1304                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1305                         if (vif->bss_conf.arp_addr_cnt != 1) {
1306                                 attr->mask = 0;
1307                                 continue;
1308                         }
1309
1310                         attr->val = vif->bss_conf.arp_addr_list[0];
1311                         break;
1312                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1313                         attr->val = *(__be32 *)&vif->addr[2];
1314                         break;
1315                 default:
1316                         break;
1317                 }
1318                 attr->reserved1 = 0;
1319                 out_filter->num_attrs++;
1320         }
1321 }
1322
1323 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1324                                           struct ieee80211_vif *vif)
1325 {
1326         struct iwl_bcast_iter_data *data = _data;
1327         struct iwl_mvm *mvm = data->mvm;
1328         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1329         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1330         struct iwl_fw_bcast_mac *bcast_mac;
1331         int i;
1332
1333         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1334                 return;
1335
1336         bcast_mac = &cmd->macs[mvmvif->id];
1337
1338         /*
1339          * enable filtering only for associated stations, but not for P2P
1340          * Clients
1341          */
1342         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1343             !vif->bss_conf.assoc)
1344                 return;
1345
1346         bcast_mac->default_discard = 1;
1347
1348         /* copy all configured filters */
1349         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1350                 /*
1351                  * Make sure we don't exceed our filters limit.
1352                  * if there is still a valid filter to be configured,
1353                  * be on the safe side and just allow bcast for this mac.
1354                  */
1355                 if (WARN_ON_ONCE(data->current_filter >=
1356                                  ARRAY_SIZE(cmd->filters))) {
1357                         bcast_mac->default_discard = 0;
1358                         bcast_mac->attached_filters = 0;
1359                         break;
1360                 }
1361
1362                 iwl_mvm_set_bcast_filter(vif,
1363                                          &mvm->bcast_filters[i],
1364                                          &cmd->filters[data->current_filter]);
1365
1366                 /* skip current filter if it contains no attributes */
1367                 if (!cmd->filters[data->current_filter].num_attrs)
1368                         continue;
1369
1370                 /* attach the filter to current mac */
1371                 bcast_mac->attached_filters |=
1372                                 cpu_to_le16(BIT(data->current_filter));
1373
1374                 data->current_filter++;
1375         }
1376 }
1377
1378 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1379                                     struct iwl_bcast_filter_cmd *cmd)
1380 {
1381         struct iwl_bcast_iter_data iter_data = {
1382                 .mvm = mvm,
1383                 .cmd = cmd,
1384         };
1385
1386         memset(cmd, 0, sizeof(*cmd));
1387         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1388         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1389
1390 #ifdef CONFIG_IWLWIFI_DEBUGFS
1391         /* use debugfs filters/macs if override is configured */
1392         if (mvm->dbgfs_bcast_filtering.override) {
1393                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1394                        sizeof(cmd->filters));
1395                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1396                        sizeof(cmd->macs));
1397                 return true;
1398         }
1399 #endif
1400
1401         /* if no filters are configured, do nothing */
1402         if (!mvm->bcast_filters)
1403                 return false;
1404
1405         /* configure and attach these filters for each associated sta vif */
1406         ieee80211_iterate_active_interfaces(
1407                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1408                 iwl_mvm_bcast_filter_iterator, &iter_data);
1409
1410         return true;
1411 }
1412 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1413                                           struct ieee80211_vif *vif)
1414 {
1415         struct iwl_bcast_filter_cmd cmd;
1416
1417         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1418                 return 0;
1419
1420         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1421                 return 0;
1422
1423         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1424                                     sizeof(cmd), &cmd);
1425 }
1426 #else
1427 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1428                                                  struct ieee80211_vif *vif)
1429 {
1430         return 0;
1431 }
1432 #endif
1433
1434 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1435                                              struct ieee80211_vif *vif,
1436                                              struct ieee80211_bss_conf *bss_conf,
1437                                              u32 changes)
1438 {
1439         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1440         int ret;
1441
1442         /*
1443          * Re-calculate the tsf id, as the master-slave relations depend on the
1444          * beacon interval, which was not known when the station interface was
1445          * added.
1446          */
1447         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1448                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1449
1450         /*
1451          * If we're not associated yet, take the (new) BSSID before associating
1452          * so the firmware knows. If we're already associated, then use the old
1453          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1454          * branch for disassociation below.
1455          */
1456         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1457                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1458
1459         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1460         if (ret)
1461                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1462
1463         /* after sending it once, adopt mac80211 data */
1464         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1465         mvmvif->associated = bss_conf->assoc;
1466
1467         if (changes & BSS_CHANGED_ASSOC) {
1468                 if (bss_conf->assoc) {
1469                         /* add quota for this interface */
1470                         ret = iwl_mvm_update_quotas(mvm, NULL);
1471                         if (ret) {
1472                                 IWL_ERR(mvm, "failed to update quotas\n");
1473                                 return;
1474                         }
1475
1476                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1477                                      &mvm->status)) {
1478                                 /*
1479                                  * If we're restarting then the firmware will
1480                                  * obviously have lost synchronisation with
1481                                  * the AP. It will attempt to synchronise by
1482                                  * itself, but we can make it more reliable by
1483                                  * scheduling a session protection time event.
1484                                  *
1485                                  * The firmware needs to receive a beacon to
1486                                  * catch up with synchronisation, use 110% of
1487                                  * the beacon interval.
1488                                  *
1489                                  * Set a large maximum delay to allow for more
1490                                  * than a single interface.
1491                                  */
1492                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1493                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1494                                                         5 * dur, false);
1495                         }
1496
1497                         iwl_mvm_sf_update(mvm, vif, false);
1498                         iwl_mvm_power_vif_assoc(mvm, vif);
1499                         if (vif->p2p) {
1500                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1501                                 iwl_mvm_update_smps(mvm, vif,
1502                                                     IWL_MVM_SMPS_REQ_PROT,
1503                                                     IEEE80211_SMPS_DYNAMIC);
1504                         }
1505                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1506                         /*
1507                          * If update fails - SF might be running in associated
1508                          * mode while disassociated - which is forbidden.
1509                          */
1510                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1511                                   "Failed to update SF upon disassociation\n");
1512
1513                         /* remove AP station now that the MAC is unassoc */
1514                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1515                         if (ret)
1516                                 IWL_ERR(mvm, "failed to remove AP station\n");
1517
1518                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1519                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1520                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1521                         /* remove quota for this interface */
1522                         ret = iwl_mvm_update_quotas(mvm, NULL);
1523                         if (ret)
1524                                 IWL_ERR(mvm, "failed to update quotas\n");
1525
1526                         if (vif->p2p)
1527                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1528
1529                         /* this will take the cleared BSSID from bss_conf */
1530                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1531                         if (ret)
1532                                 IWL_ERR(mvm,
1533                                         "failed to update MAC %pM (clear after unassoc)\n",
1534                                         vif->addr);
1535                 }
1536
1537                 iwl_mvm_recalc_multicast(mvm);
1538                 iwl_mvm_configure_bcast_filter(mvm, vif);
1539
1540                 /* reset rssi values */
1541                 mvmvif->bf_data.ave_beacon_signal = 0;
1542
1543                 iwl_mvm_bt_coex_vif_change(mvm);
1544                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1545                                     IEEE80211_SMPS_AUTOMATIC);
1546         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1547                 /*
1548                  * We received a beacon _after_ association so
1549                  * remove the session protection.
1550                  */
1551                 iwl_mvm_remove_time_event(mvm, mvmvif,
1552                                           &mvmvif->time_event_data);
1553         }
1554
1555         if (changes & BSS_CHANGED_BEACON_INFO) {
1556                 iwl_mvm_sf_update(mvm, vif, false);
1557                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1558         }
1559
1560         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1561                 ret = iwl_mvm_power_update_mac(mvm);
1562                 if (ret)
1563                         IWL_ERR(mvm, "failed to update power mode\n");
1564         }
1565
1566         if (changes & BSS_CHANGED_TXPOWER) {
1567                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1568                                 bss_conf->txpower);
1569                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1570         }
1571
1572         if (changes & BSS_CHANGED_CQM) {
1573                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1574                 /* reset cqm events tracking */
1575                 mvmvif->bf_data.last_cqm_event = 0;
1576                 if (mvmvif->bf_data.bf_enabled) {
1577                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1578                         if (ret)
1579                                 IWL_ERR(mvm,
1580                                         "failed to update CQM thresholds\n");
1581                 }
1582         }
1583
1584         if (changes & BSS_CHANGED_ARP_FILTER) {
1585                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1586                 iwl_mvm_configure_bcast_filter(mvm, vif);
1587         }
1588 }
1589
1590 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1591                                  struct ieee80211_vif *vif)
1592 {
1593         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1594         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1595         int ret;
1596
1597         /*
1598          * iwl_mvm_mac_ctxt_add() might read directly from the device
1599          * (the system time), so make sure it is available.
1600          */
1601         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1602         if (ret)
1603                 return ret;
1604
1605         mutex_lock(&mvm->mutex);
1606
1607         /* Send the beacon template */
1608         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1609         if (ret)
1610                 goto out_unlock;
1611
1612         /*
1613          * Re-calculate the tsf id, as the master-slave relations depend on the
1614          * beacon interval, which was not known when the AP interface was added.
1615          */
1616         if (vif->type == NL80211_IFTYPE_AP)
1617                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1618
1619         /* Add the mac context */
1620         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1621         if (ret)
1622                 goto out_unlock;
1623
1624         /* Perform the binding */
1625         ret = iwl_mvm_binding_add_vif(mvm, vif);
1626         if (ret)
1627                 goto out_remove;
1628
1629         /* Send the bcast station. At this stage the TBTT and DTIM time events
1630          * are added and applied to the scheduler */
1631         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1632         if (ret)
1633                 goto out_unbind;
1634
1635         /* must be set before quota calculations */
1636         mvmvif->ap_ibss_active = true;
1637
1638         /* power updated needs to be done before quotas */
1639         iwl_mvm_power_update_mac(mvm);
1640
1641         ret = iwl_mvm_update_quotas(mvm, NULL);
1642         if (ret)
1643                 goto out_quota_failed;
1644
1645         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1646         if (vif->p2p && mvm->p2p_device_vif)
1647                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1648
1649         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1650
1651         iwl_mvm_bt_coex_vif_change(mvm);
1652
1653         /* we don't support TDLS during DCM */
1654         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1655                 iwl_mvm_teardown_tdls_peers(mvm);
1656
1657         mutex_unlock(&mvm->mutex);
1658         return 0;
1659
1660 out_quota_failed:
1661         iwl_mvm_power_update_mac(mvm);
1662         mvmvif->ap_ibss_active = false;
1663         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1664 out_unbind:
1665         iwl_mvm_binding_remove_vif(mvm, vif);
1666 out_remove:
1667         iwl_mvm_mac_ctxt_remove(mvm, vif);
1668 out_unlock:
1669         mutex_unlock(&mvm->mutex);
1670         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1671         return ret;
1672 }
1673
1674 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1675                                  struct ieee80211_vif *vif)
1676 {
1677         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1678         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1679
1680         iwl_mvm_prepare_mac_removal(mvm, vif);
1681
1682         mutex_lock(&mvm->mutex);
1683
1684         /* Handle AP stop while in CSA */
1685         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1686                 iwl_mvm_remove_time_event(mvm, mvmvif,
1687                                           &mvmvif->time_event_data);
1688                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1689         }
1690
1691         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1692                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1693                 mvm->csa_tx_block_bcn_timeout = 0;
1694         }
1695
1696         mvmvif->ap_ibss_active = false;
1697         mvm->ap_last_beacon_gp2 = 0;
1698
1699         iwl_mvm_bt_coex_vif_change(mvm);
1700
1701         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1702
1703         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1704         if (vif->p2p && mvm->p2p_device_vif)
1705                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1706
1707         iwl_mvm_update_quotas(mvm, NULL);
1708         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1709         iwl_mvm_binding_remove_vif(mvm, vif);
1710
1711         iwl_mvm_power_update_mac(mvm);
1712
1713         iwl_mvm_mac_ctxt_remove(mvm, vif);
1714
1715         mutex_unlock(&mvm->mutex);
1716 }
1717
1718 static void
1719 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1720                                  struct ieee80211_vif *vif,
1721                                  struct ieee80211_bss_conf *bss_conf,
1722                                  u32 changes)
1723 {
1724         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1725
1726         /* Changes will be applied when the AP/IBSS is started */
1727         if (!mvmvif->ap_ibss_active)
1728                 return;
1729
1730         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1731                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1732             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1733                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1734
1735         /* Need to send a new beacon template to the FW */
1736         if (changes & BSS_CHANGED_BEACON &&
1737             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1738                 IWL_WARN(mvm, "Failed updating beacon data\n");
1739
1740         if (changes & BSS_CHANGED_TXPOWER) {
1741                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1742                                 bss_conf->txpower);
1743                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1744         }
1745
1746 }
1747
1748 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1749                                      struct ieee80211_vif *vif,
1750                                      struct ieee80211_bss_conf *bss_conf,
1751                                      u32 changes)
1752 {
1753         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1754
1755         /*
1756          * iwl_mvm_bss_info_changed_station() might call
1757          * iwl_mvm_protect_session(), which reads directly from
1758          * the device (the system time), so make sure it is available.
1759          */
1760         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1761                 return;
1762
1763         mutex_lock(&mvm->mutex);
1764
1765         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1766                 iwl_mvm_scan_offload_stop(mvm, true);
1767
1768         switch (vif->type) {
1769         case NL80211_IFTYPE_STATION:
1770                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1771                 break;
1772         case NL80211_IFTYPE_AP:
1773         case NL80211_IFTYPE_ADHOC:
1774                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1775                 break;
1776         default:
1777                 /* shouldn't happen */
1778                 WARN_ON_ONCE(1);
1779         }
1780
1781         mutex_unlock(&mvm->mutex);
1782         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1783 }
1784
1785 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1786                                           enum iwl_scan_status scan_type)
1787 {
1788         int ret;
1789         bool wait_for_handlers = false;
1790
1791         mutex_lock(&mvm->mutex);
1792
1793         if (mvm->scan_status != scan_type) {
1794                 ret = 0;
1795                 /* make sure there are no pending notifications */
1796                 wait_for_handlers = true;
1797                 goto out;
1798         }
1799
1800         switch (scan_type) {
1801         case IWL_MVM_SCAN_SCHED:
1802                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1803                 break;
1804         case IWL_MVM_SCAN_OS:
1805                 ret = iwl_mvm_cancel_scan(mvm);
1806                 break;
1807         case IWL_MVM_SCAN_NONE:
1808         default:
1809                 WARN_ON_ONCE(1);
1810                 ret = -EINVAL;
1811                 break;
1812         }
1813         if (ret)
1814                 goto out;
1815
1816         wait_for_handlers = true;
1817 out:
1818         mutex_unlock(&mvm->mutex);
1819
1820         /* make sure we consume the completion notification */
1821         if (wait_for_handlers)
1822                 iwl_mvm_wait_for_async_handlers(mvm);
1823
1824         return ret;
1825 }
1826 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1827                                struct ieee80211_vif *vif,
1828                                struct ieee80211_scan_request *hw_req)
1829 {
1830         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1831         struct cfg80211_scan_request *req = &hw_req->req;
1832         int ret;
1833
1834         if (req->n_channels == 0 ||
1835             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1836                 return -EINVAL;
1837
1838         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1839         if (ret)
1840                 return ret;
1841
1842         mutex_lock(&mvm->mutex);
1843
1844         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1845                 ret = -EBUSY;
1846                 goto out;
1847         }
1848
1849         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1850
1851         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1852                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1853         else
1854                 ret = iwl_mvm_scan_request(mvm, vif, req);
1855
1856         if (ret)
1857                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1858 out:
1859         mutex_unlock(&mvm->mutex);
1860         return ret;
1861 }
1862
1863 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1864                                        struct ieee80211_vif *vif)
1865 {
1866         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1867
1868         mutex_lock(&mvm->mutex);
1869
1870         iwl_mvm_cancel_scan(mvm);
1871
1872         mutex_unlock(&mvm->mutex);
1873 }
1874
1875 static void
1876 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1877                                   struct ieee80211_sta *sta, u16 tids,
1878                                   int num_frames,
1879                                   enum ieee80211_frame_release_type reason,
1880                                   bool more_data)
1881 {
1882         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1883
1884         /* Called when we need to transmit (a) frame(s) from mac80211 */
1885
1886         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1887                                           tids, more_data, false);
1888 }
1889
1890 static void
1891 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1892                                     struct ieee80211_sta *sta, u16 tids,
1893                                     int num_frames,
1894                                     enum ieee80211_frame_release_type reason,
1895                                     bool more_data)
1896 {
1897         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1898
1899         /* Called when we need to transmit (a) frame(s) from agg queue */
1900
1901         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1902                                           tids, more_data, true);
1903 }
1904
1905 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1906                                    struct ieee80211_vif *vif,
1907                                    enum sta_notify_cmd cmd,
1908                                    struct ieee80211_sta *sta)
1909 {
1910         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1911         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1912         int tid;
1913
1914         switch (cmd) {
1915         case STA_NOTIFY_SLEEP:
1916                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1917                         ieee80211_sta_block_awake(hw, sta, true);
1918                 spin_lock_bh(&mvmsta->lock);
1919                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1920                         struct iwl_mvm_tid_data *tid_data;
1921
1922                         tid_data = &mvmsta->tid_data[tid];
1923                         if (tid_data->state != IWL_AGG_ON &&
1924                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1925                                 continue;
1926                         if (iwl_mvm_tid_queued(tid_data) == 0)
1927                                 continue;
1928                         ieee80211_sta_set_buffered(sta, tid, true);
1929                 }
1930                 spin_unlock_bh(&mvmsta->lock);
1931                 /*
1932                  * The fw updates the STA to be asleep. Tx packets on the Tx
1933                  * queues to this station will not be transmitted. The fw will
1934                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1935                  */
1936                 break;
1937         case STA_NOTIFY_AWAKE:
1938                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1939                         break;
1940                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1941                 break;
1942         default:
1943                 break;
1944         }
1945 }
1946
1947 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1948                                        struct ieee80211_vif *vif,
1949                                        struct ieee80211_sta *sta)
1950 {
1951         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1952         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1953
1954         /*
1955          * This is called before mac80211 does RCU synchronisation,
1956          * so here we already invalidate our internal RCU-protected
1957          * station pointer. The rest of the code will thus no longer
1958          * be able to find the station this way, and we don't rely
1959          * on further RCU synchronisation after the sta_state()
1960          * callback deleted the station.
1961          */
1962         mutex_lock(&mvm->mutex);
1963         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1964                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1965                                    ERR_PTR(-ENOENT));
1966         mutex_unlock(&mvm->mutex);
1967 }
1968
1969 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1970                                  struct ieee80211_vif *vif,
1971                                  struct ieee80211_sta *sta,
1972                                  enum ieee80211_sta_state old_state,
1973                                  enum ieee80211_sta_state new_state)
1974 {
1975         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1976         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1977         int ret;
1978
1979         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1980                            sta->addr, old_state, new_state);
1981
1982         /* this would be a mac80211 bug ... but don't crash */
1983         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1984                 return -EINVAL;
1985
1986         /* if a STA is being removed, reuse its ID */
1987         flush_work(&mvm->sta_drained_wk);
1988
1989         mutex_lock(&mvm->mutex);
1990         if (old_state == IEEE80211_STA_NOTEXIST &&
1991             new_state == IEEE80211_STA_NONE) {
1992                 /*
1993                  * Firmware bug - it'll crash if the beacon interval is less
1994                  * than 16. We can't avoid connecting at all, so refuse the
1995                  * station state change, this will cause mac80211 to abandon
1996                  * attempts to connect to this AP, and eventually wpa_s will
1997                  * blacklist the AP...
1998                  */
1999                 if (vif->type == NL80211_IFTYPE_STATION &&
2000                     vif->bss_conf.beacon_int < 16) {
2001                         IWL_ERR(mvm,
2002                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2003                                 sta->addr, vif->bss_conf.beacon_int);
2004                         ret = -EINVAL;
2005                         goto out_unlock;
2006                 }
2007
2008                 if (sta->tdls &&
2009                     (vif->p2p ||
2010                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2011                                                 IWL_MVM_TDLS_STA_COUNT ||
2012                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2013                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2014                         ret = -EBUSY;
2015                         goto out_unlock;
2016                 }
2017
2018                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2019                 if (sta->tdls && ret == 0)
2020                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2021         } else if (old_state == IEEE80211_STA_NONE &&
2022                    new_state == IEEE80211_STA_AUTH) {
2023                 /*
2024                  * EBS may be disabled due to previous failures reported by FW.
2025                  * Reset EBS status here assuming environment has been changed.
2026                  */
2027                 mvm->last_ebs_successful = true;
2028                 ret = 0;
2029         } else if (old_state == IEEE80211_STA_AUTH &&
2030                    new_state == IEEE80211_STA_ASSOC) {
2031                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2032                 if (ret == 0)
2033                         iwl_mvm_rs_rate_init(mvm, sta,
2034                                              mvmvif->phy_ctxt->channel->band,
2035                                              true);
2036         } else if (old_state == IEEE80211_STA_ASSOC &&
2037                    new_state == IEEE80211_STA_AUTHORIZED) {
2038
2039                 /* we don't support TDLS during DCM */
2040                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2041                         iwl_mvm_teardown_tdls_peers(mvm);
2042
2043                 /* enable beacon filtering */
2044                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2045                 ret = 0;
2046         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2047                    new_state == IEEE80211_STA_ASSOC) {
2048                 /* disable beacon filtering */
2049                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2050                 ret = 0;
2051         } else if (old_state == IEEE80211_STA_ASSOC &&
2052                    new_state == IEEE80211_STA_AUTH) {
2053                 ret = 0;
2054         } else if (old_state == IEEE80211_STA_AUTH &&
2055                    new_state == IEEE80211_STA_NONE) {
2056                 ret = 0;
2057         } else if (old_state == IEEE80211_STA_NONE &&
2058                    new_state == IEEE80211_STA_NOTEXIST) {
2059                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2060                 if (sta->tdls)
2061                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2062         } else {
2063                 ret = -EIO;
2064         }
2065  out_unlock:
2066         mutex_unlock(&mvm->mutex);
2067
2068         return ret;
2069 }
2070
2071 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2072 {
2073         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2074
2075         mvm->rts_threshold = value;
2076
2077         return 0;
2078 }
2079
2080 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2081                                   struct ieee80211_vif *vif,
2082                                   struct ieee80211_sta *sta, u32 changed)
2083 {
2084         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2085
2086         if (vif->type == NL80211_IFTYPE_STATION &&
2087             changed & IEEE80211_RC_NSS_CHANGED)
2088                 iwl_mvm_sf_update(mvm, vif, false);
2089 }
2090
2091 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2092                                struct ieee80211_vif *vif, u16 ac,
2093                                const struct ieee80211_tx_queue_params *params)
2094 {
2095         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2096         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2097
2098         mvmvif->queue_params[ac] = *params;
2099
2100         /*
2101          * No need to update right away, we'll get BSS_CHANGED_QOS
2102          * The exception is P2P_DEVICE interface which needs immediate update.
2103          */
2104         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2105                 int ret;
2106
2107                 mutex_lock(&mvm->mutex);
2108                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2109                 mutex_unlock(&mvm->mutex);
2110                 return ret;
2111         }
2112         return 0;
2113 }
2114
2115 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2116                                       struct ieee80211_vif *vif)
2117 {
2118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2119         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2120                            200 + vif->bss_conf.beacon_int);
2121         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2122                                100 + vif->bss_conf.beacon_int);
2123
2124         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2125                 return;
2126
2127         /*
2128          * iwl_mvm_protect_session() reads directly from the device
2129          * (the system time), so make sure it is available.
2130          */
2131         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2132                 return;
2133
2134         mutex_lock(&mvm->mutex);
2135         /* Try really hard to protect the session and hear a beacon */
2136         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2137         mutex_unlock(&mvm->mutex);
2138
2139         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2140 }
2141
2142 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2143                                         struct ieee80211_vif *vif,
2144                                         struct cfg80211_sched_scan_request *req,
2145                                         struct ieee80211_scan_ies *ies)
2146 {
2147         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2148         int ret;
2149
2150         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2151         if (ret)
2152                 return ret;
2153
2154         mutex_lock(&mvm->mutex);
2155
2156         /* Newest FW fixes sched scan while connected on another interface */
2157         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2158                 if (!vif->bss_conf.idle) {
2159                         ret = -EBUSY;
2160                         goto out;
2161                 }
2162         } else if (!iwl_mvm_is_idle(mvm)) {
2163                 ret = -EBUSY;
2164                 goto out;
2165         }
2166
2167         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2168                 ret = -EBUSY;
2169                 goto out;
2170         }
2171
2172         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2173
2174         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2175                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2176                 if (ret)
2177                         goto err;
2178         }
2179
2180         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2181         if (ret)
2182                 goto err;
2183
2184         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2185                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2186         else
2187                 ret = iwl_mvm_sched_scan_start(mvm, req);
2188
2189         if (!ret)
2190                 goto out;
2191 err:
2192         mvm->scan_status = IWL_MVM_SCAN_NONE;
2193 out:
2194         mutex_unlock(&mvm->mutex);
2195         return ret;
2196 }
2197
2198 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2199                                        struct ieee80211_vif *vif)
2200 {
2201         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2202         int ret;
2203
2204         mutex_lock(&mvm->mutex);
2205         ret = iwl_mvm_scan_offload_stop(mvm, false);
2206         mutex_unlock(&mvm->mutex);
2207         iwl_mvm_wait_for_async_handlers(mvm);
2208
2209         return ret;
2210 }
2211
2212 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2213                                enum set_key_cmd cmd,
2214                                struct ieee80211_vif *vif,
2215                                struct ieee80211_sta *sta,
2216                                struct ieee80211_key_conf *key)
2217 {
2218         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2219         int ret;
2220
2221         if (iwlwifi_mod_params.sw_crypto) {
2222                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2223                 return -EOPNOTSUPP;
2224         }
2225
2226         switch (key->cipher) {
2227         case WLAN_CIPHER_SUITE_TKIP:
2228                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2229                 /* fall-through */
2230         case WLAN_CIPHER_SUITE_CCMP:
2231                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2232                 break;
2233         case WLAN_CIPHER_SUITE_AES_CMAC:
2234                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2235                 break;
2236         case WLAN_CIPHER_SUITE_WEP40:
2237         case WLAN_CIPHER_SUITE_WEP104:
2238                 /*
2239                  * Support for TX only, at least for now, so accept
2240                  * the key and do nothing else. Then mac80211 will
2241                  * pass it for TX but we don't have to use it for RX.
2242                  */
2243                 return 0;
2244         default:
2245                 /* currently FW supports only one optional cipher scheme */
2246                 if (hw->n_cipher_schemes &&
2247                     hw->cipher_schemes->cipher == key->cipher)
2248                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2249                 else
2250                         return -EOPNOTSUPP;
2251         }
2252
2253         mutex_lock(&mvm->mutex);
2254
2255         switch (cmd) {
2256         case SET_KEY:
2257                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2258                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2259                         /*
2260                          * GTK on AP interface is a TX-only key, return 0;
2261                          * on IBSS they're per-station and because we're lazy
2262                          * we don't support them for RX, so do the same.
2263                          */
2264                         ret = 0;
2265                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2266                         break;
2267                 }
2268
2269                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2270                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2271                 if (ret) {
2272                         IWL_WARN(mvm, "set key failed\n");
2273                         /*
2274                          * can't add key for RX, but we don't need it
2275                          * in the device for TX so still return 0
2276                          */
2277                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2278                         ret = 0;
2279                 }
2280
2281                 break;
2282         case DISABLE_KEY:
2283                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2284                         ret = 0;
2285                         break;
2286                 }
2287
2288                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2289                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2290                 break;
2291         default:
2292                 ret = -EINVAL;
2293         }
2294
2295         mutex_unlock(&mvm->mutex);
2296         return ret;
2297 }
2298
2299 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2300                                         struct ieee80211_vif *vif,
2301                                         struct ieee80211_key_conf *keyconf,
2302                                         struct ieee80211_sta *sta,
2303                                         u32 iv32, u16 *phase1key)
2304 {
2305         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2306
2307         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2308                 return;
2309
2310         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2311 }
2312
2313
2314 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2315                                struct iwl_rx_packet *pkt, void *data)
2316 {
2317         struct iwl_mvm *mvm =
2318                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2319         struct iwl_hs20_roc_res *resp;
2320         int resp_len = iwl_rx_packet_payload_len(pkt);
2321         struct iwl_mvm_time_event_data *te_data = data;
2322
2323         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2324                 return true;
2325
2326         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2327                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2328                 return true;
2329         }
2330
2331         resp = (void *)pkt->data;
2332
2333         IWL_DEBUG_TE(mvm,
2334                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2335                      resp->status, resp->event_unique_id);
2336
2337         te_data->uid = le32_to_cpu(resp->event_unique_id);
2338         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2339                      te_data->uid);
2340
2341         spin_lock_bh(&mvm->time_event_lock);
2342         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2343         spin_unlock_bh(&mvm->time_event_lock);
2344
2345         return true;
2346 }
2347
2348 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2349 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2350                                     struct ieee80211_channel *channel,
2351                                     struct ieee80211_vif *vif,
2352                                     int duration)
2353 {
2354         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2355         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2356         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2357         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2358         struct iwl_notification_wait wait_time_event;
2359         struct iwl_hs20_roc_req aux_roc_req = {
2360                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2361                 .id_and_color =
2362                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2363                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2364                 /* Set the channel info data */
2365                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2366                         PHY_BAND_24 : PHY_BAND_5,
2367                 .channel_info.channel = channel->hw_value,
2368                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2369                 /* Set the time and duration */
2370                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2371                 .apply_time_max_delay =
2372                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2373                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2374          };
2375
2376         /* Set the node address */
2377         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2378
2379         lockdep_assert_held(&mvm->mutex);
2380
2381         spin_lock_bh(&mvm->time_event_lock);
2382
2383         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2384                 spin_unlock_bh(&mvm->time_event_lock);
2385                 return -EIO;
2386         }
2387
2388         te_data->vif = vif;
2389         te_data->duration = duration;
2390         te_data->id = HOT_SPOT_CMD;
2391
2392         spin_unlock_bh(&mvm->time_event_lock);
2393
2394         /*
2395          * Use a notification wait, which really just processes the
2396          * command response and doesn't wait for anything, in order
2397          * to be able to process the response and get the UID inside
2398          * the RX path. Using CMD_WANT_SKB doesn't work because it
2399          * stores the buffer and then wakes up this thread, by which
2400          * time another notification (that the time event started)
2401          * might already be processed unsuccessfully.
2402          */
2403         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2404                                    time_event_response,
2405                                    ARRAY_SIZE(time_event_response),
2406                                    iwl_mvm_rx_aux_roc, te_data);
2407
2408         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2409                                    &aux_roc_req);
2410
2411         if (res) {
2412                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2413                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2414                 goto out_clear_te;
2415         }
2416
2417         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2418         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2419         /* should never fail */
2420         WARN_ON_ONCE(res);
2421
2422         if (res) {
2423  out_clear_te:
2424                 spin_lock_bh(&mvm->time_event_lock);
2425                 iwl_mvm_te_clear_data(mvm, te_data);
2426                 spin_unlock_bh(&mvm->time_event_lock);
2427         }
2428
2429         return res;
2430 }
2431
2432 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2433                        struct ieee80211_vif *vif,
2434                        struct ieee80211_channel *channel,
2435                        int duration,
2436                        enum ieee80211_roc_type type)
2437 {
2438         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2439         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2440         struct cfg80211_chan_def chandef;
2441         struct iwl_mvm_phy_ctxt *phy_ctxt;
2442         int ret, i;
2443
2444         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2445                            duration, type);
2446
2447         mutex_lock(&mvm->mutex);
2448
2449         switch (vif->type) {
2450         case NL80211_IFTYPE_STATION:
2451                 /* Use aux roc framework (HS20) */
2452                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2453                                                vif, duration);
2454                 goto out_unlock;
2455         case NL80211_IFTYPE_P2P_DEVICE:
2456                 /* handle below */
2457                 break;
2458         default:
2459                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2460                 ret = -EINVAL;
2461                 goto out_unlock;
2462         }
2463
2464         for (i = 0; i < NUM_PHY_CTX; i++) {
2465                 phy_ctxt = &mvm->phy_ctxts[i];
2466                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2467                         continue;
2468
2469                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2470                         /*
2471                          * Unbind the P2P_DEVICE from the current PHY context,
2472                          * and if the PHY context is not used remove it.
2473                          */
2474                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2475                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2476                                 goto out_unlock;
2477
2478                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2479
2480                         /* Bind the P2P_DEVICE to the current PHY Context */
2481                         mvmvif->phy_ctxt = phy_ctxt;
2482
2483                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2484                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2485                                 goto out_unlock;
2486
2487                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2488                         goto schedule_time_event;
2489                 }
2490         }
2491
2492         /* Need to update the PHY context only if the ROC channel changed */
2493         if (channel == mvmvif->phy_ctxt->channel)
2494                 goto schedule_time_event;
2495
2496         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2497
2498         /*
2499          * Change the PHY context configuration as it is currently referenced
2500          * only by the P2P Device MAC
2501          */
2502         if (mvmvif->phy_ctxt->ref == 1) {
2503                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2504                                                &chandef, 1, 1);
2505                 if (ret)
2506                         goto out_unlock;
2507         } else {
2508                 /*
2509                  * The PHY context is shared with other MACs. Need to remove the
2510                  * P2P Device from the binding, allocate an new PHY context and
2511                  * create a new binding
2512                  */
2513                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2514                 if (!phy_ctxt) {
2515                         ret = -ENOSPC;
2516                         goto out_unlock;
2517                 }
2518
2519                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2520                                                1, 1);
2521                 if (ret) {
2522                         IWL_ERR(mvm, "Failed to change PHY context\n");
2523                         goto out_unlock;
2524                 }
2525
2526                 /* Unbind the P2P_DEVICE from the current PHY context */
2527                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2528                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2529                         goto out_unlock;
2530
2531                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2532
2533                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2534                 mvmvif->phy_ctxt = phy_ctxt;
2535
2536                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2537                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2538                         goto out_unlock;
2539
2540                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2541         }
2542
2543 schedule_time_event:
2544         /* Schedule the time events */
2545         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2546
2547 out_unlock:
2548         mutex_unlock(&mvm->mutex);
2549         IWL_DEBUG_MAC80211(mvm, "leave\n");
2550         return ret;
2551 }
2552
2553 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2554 {
2555         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2556
2557         IWL_DEBUG_MAC80211(mvm, "enter\n");
2558
2559         mutex_lock(&mvm->mutex);
2560         iwl_mvm_stop_p2p_roc(mvm);
2561         mutex_unlock(&mvm->mutex);
2562
2563         IWL_DEBUG_MAC80211(mvm, "leave\n");
2564         return 0;
2565 }
2566
2567 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2568                                  struct ieee80211_chanctx_conf *ctx)
2569 {
2570         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2571         struct iwl_mvm_phy_ctxt *phy_ctxt;
2572         int ret;
2573
2574         lockdep_assert_held(&mvm->mutex);
2575
2576         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2577
2578         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2579         if (!phy_ctxt) {
2580                 ret = -ENOSPC;
2581                 goto out;
2582         }
2583
2584         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2585                                        ctx->rx_chains_static,
2586                                        ctx->rx_chains_dynamic);
2587         if (ret) {
2588                 IWL_ERR(mvm, "Failed to add PHY context\n");
2589                 goto out;
2590         }
2591
2592         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2593         *phy_ctxt_id = phy_ctxt->id;
2594 out:
2595         return ret;
2596 }
2597
2598 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2599                                struct ieee80211_chanctx_conf *ctx)
2600 {
2601         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2602         int ret;
2603
2604         mutex_lock(&mvm->mutex);
2605         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2606         mutex_unlock(&mvm->mutex);
2607
2608         return ret;
2609 }
2610
2611 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2612                                      struct ieee80211_chanctx_conf *ctx)
2613 {
2614         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2615         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2616
2617         lockdep_assert_held(&mvm->mutex);
2618
2619         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2620 }
2621
2622 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2623                                    struct ieee80211_chanctx_conf *ctx)
2624 {
2625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2626
2627         mutex_lock(&mvm->mutex);
2628         __iwl_mvm_remove_chanctx(mvm, ctx);
2629         mutex_unlock(&mvm->mutex);
2630 }
2631
2632 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2633                                    struct ieee80211_chanctx_conf *ctx,
2634                                    u32 changed)
2635 {
2636         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2637         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2638         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2639
2640         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2641                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2642                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2643                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2644                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2645                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2646                       phy_ctxt->ref, changed))
2647                 return;
2648
2649         mutex_lock(&mvm->mutex);
2650         iwl_mvm_bt_coex_vif_change(mvm);
2651         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2652                                  ctx->rx_chains_static,
2653                                  ctx->rx_chains_dynamic);
2654         mutex_unlock(&mvm->mutex);
2655 }
2656
2657 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2658                                         struct ieee80211_vif *vif,
2659                                         struct ieee80211_chanctx_conf *ctx,
2660                                         bool switching_chanctx)
2661 {
2662         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2663         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2664         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2665         int ret;
2666
2667         lockdep_assert_held(&mvm->mutex);
2668
2669         mvmvif->phy_ctxt = phy_ctxt;
2670
2671         switch (vif->type) {
2672         case NL80211_IFTYPE_AP:
2673                 /* Unless it's a CSA flow we have nothing to do here */
2674                 if (vif->csa_active) {
2675                         mvmvif->ap_ibss_active = true;
2676                         break;
2677                 }
2678         case NL80211_IFTYPE_ADHOC:
2679                 /*
2680                  * The AP binding flow is handled as part of the start_ap flow
2681                  * (in bss_info_changed), similarly for IBSS.
2682                  */
2683                 ret = 0;
2684                 goto out;
2685         case NL80211_IFTYPE_STATION:
2686                 break;
2687         case NL80211_IFTYPE_MONITOR:
2688                 /* always disable PS when a monitor interface is active */
2689                 mvmvif->ps_disabled = true;
2690                 break;
2691         default:
2692                 ret = -EINVAL;
2693                 goto out;
2694         }
2695
2696         ret = iwl_mvm_binding_add_vif(mvm, vif);
2697         if (ret)
2698                 goto out;
2699
2700         /*
2701          * Power state must be updated before quotas,
2702          * otherwise fw will complain.
2703          */
2704         iwl_mvm_power_update_mac(mvm);
2705
2706         /* Setting the quota at this stage is only required for monitor
2707          * interfaces. For the other types, the bss_info changed flow
2708          * will handle quota settings.
2709          */
2710         if (vif->type == NL80211_IFTYPE_MONITOR) {
2711                 mvmvif->monitor_active = true;
2712                 ret = iwl_mvm_update_quotas(mvm, NULL);
2713                 if (ret)
2714                         goto out_remove_binding;
2715         }
2716
2717         /* Handle binding during CSA */
2718         if ((vif->type == NL80211_IFTYPE_AP) ||
2719             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2720                 iwl_mvm_update_quotas(mvm, NULL);
2721                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2722         }
2723
2724         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2725                 struct iwl_mvm_sta *mvmsta;
2726
2727                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2728                                                           mvmvif->ap_sta_id);
2729
2730                 if (WARN_ON(!mvmsta))
2731                         goto out;
2732
2733                 /* TODO: only re-enable after the first beacon */
2734                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2735         }
2736
2737         goto out;
2738
2739 out_remove_binding:
2740         iwl_mvm_binding_remove_vif(mvm, vif);
2741         iwl_mvm_power_update_mac(mvm);
2742 out:
2743         if (ret)
2744                 mvmvif->phy_ctxt = NULL;
2745         return ret;
2746 }
2747 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2748                                       struct ieee80211_vif *vif,
2749                                       struct ieee80211_chanctx_conf *ctx)
2750 {
2751         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2752         int ret;
2753
2754         mutex_lock(&mvm->mutex);
2755         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2756         mutex_unlock(&mvm->mutex);
2757
2758         return ret;
2759 }
2760
2761 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2762                                            struct ieee80211_vif *vif,
2763                                            struct ieee80211_chanctx_conf *ctx,
2764                                            bool switching_chanctx)
2765 {
2766         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2767         struct ieee80211_vif *disabled_vif = NULL;
2768         struct iwl_mvm_sta *mvmsta;
2769
2770         lockdep_assert_held(&mvm->mutex);
2771
2772         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2773
2774         switch (vif->type) {
2775         case NL80211_IFTYPE_ADHOC:
2776                 goto out;
2777         case NL80211_IFTYPE_MONITOR:
2778                 mvmvif->monitor_active = false;
2779                 mvmvif->ps_disabled = false;
2780                 break;
2781         case NL80211_IFTYPE_AP:
2782                 /* This part is triggered only during CSA */
2783                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2784                         goto out;
2785
2786                 /* Set CS bit on all the stations */
2787                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2788
2789                 /* Save blocked iface, the timeout is set on the next beacon */
2790                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2791
2792                 mvmvif->ap_ibss_active = false;
2793                 break;
2794         case NL80211_IFTYPE_STATION:
2795                 if (!switching_chanctx)
2796                         break;
2797
2798                 disabled_vif = vif;
2799
2800                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2801                                                           mvmvif->ap_sta_id);
2802
2803                 if (!WARN_ON(!mvmsta))
2804                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2805
2806                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2807                 break;
2808         default:
2809                 break;
2810         }
2811
2812         iwl_mvm_update_quotas(mvm, disabled_vif);
2813         iwl_mvm_binding_remove_vif(mvm, vif);
2814
2815 out:
2816         mvmvif->phy_ctxt = NULL;
2817         iwl_mvm_power_update_mac(mvm);
2818 }
2819
2820 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2821                                          struct ieee80211_vif *vif,
2822                                          struct ieee80211_chanctx_conf *ctx)
2823 {
2824         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2825
2826         mutex_lock(&mvm->mutex);
2827         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2828         mutex_unlock(&mvm->mutex);
2829 }
2830
2831 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2832                                       struct ieee80211_vif_chanctx_switch *vifs,
2833                                       int n_vifs,
2834                                       enum ieee80211_chanctx_switch_mode mode)
2835 {
2836         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2837         int ret;
2838
2839         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2840         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2841                 return -EOPNOTSUPP;
2842
2843         mutex_lock(&mvm->mutex);
2844         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2845         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2846
2847         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2848         if (ret) {
2849                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2850                 goto out_reassign;
2851         }
2852
2853         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2854                                            true);
2855         if (ret) {
2856                 IWL_ERR(mvm,
2857                         "failed to assign new_ctx during channel switch\n");
2858                 goto out_remove;
2859         }
2860
2861         /* we don't support TDLS during DCM - can be caused by channel switch */
2862         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2863                 iwl_mvm_teardown_tdls_peers(mvm);
2864
2865         goto out;
2866
2867 out_remove:
2868         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2869
2870 out_reassign:
2871         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2872         if (ret) {
2873                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2874                 goto out_restart;
2875         }
2876
2877         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2878                                            true);
2879         if (ret) {
2880                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2881                 goto out_restart;
2882         }
2883
2884         goto out;
2885
2886 out_restart:
2887         /* things keep failing, better restart the hw */
2888         iwl_mvm_nic_restart(mvm, false);
2889
2890 out:
2891         mutex_unlock(&mvm->mutex);
2892         return ret;
2893 }
2894
2895 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2896                            struct ieee80211_sta *sta,
2897                            bool set)
2898 {
2899         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2900         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2901
2902         if (!mvm_sta || !mvm_sta->vif) {
2903                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2904                 return -EINVAL;
2905         }
2906
2907         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2908 }
2909
2910 #ifdef CONFIG_NL80211_TESTMODE
2911 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2912         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2913         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2914         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2915 };
2916
2917 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2918                                       struct ieee80211_vif *vif,
2919                                       void *data, int len)
2920 {
2921         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2922         int err;
2923         u32 noa_duration;
2924
2925         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2926         if (err)
2927                 return err;
2928
2929         if (!tb[IWL_MVM_TM_ATTR_CMD])
2930                 return -EINVAL;
2931
2932         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2933         case IWL_MVM_TM_CMD_SET_NOA:
2934                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2935                     !vif->bss_conf.enable_beacon ||
2936                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2937                         return -EINVAL;
2938
2939                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2940                 if (noa_duration >= vif->bss_conf.beacon_int)
2941                         return -EINVAL;
2942
2943                 mvm->noa_duration = noa_duration;
2944                 mvm->noa_vif = vif;
2945
2946                 return iwl_mvm_update_quotas(mvm, NULL);
2947         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2948                 /* must be associated client vif - ignore authorized */
2949                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2950                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2951                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2952                         return -EINVAL;
2953
2954                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2955                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2956                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2957         }
2958
2959         return -EOPNOTSUPP;
2960 }
2961
2962 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2963                                     struct ieee80211_vif *vif,
2964                                     void *data, int len)
2965 {
2966         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2967         int err;
2968
2969         mutex_lock(&mvm->mutex);
2970         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2971         mutex_unlock(&mvm->mutex);
2972
2973         return err;
2974 }
2975 #endif
2976
2977 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2978                                           struct ieee80211_vif *vif,
2979                                           struct cfg80211_chan_def *chandef)
2980 {
2981         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2982         struct ieee80211_vif *csa_vif;
2983
2984         mutex_lock(&mvm->mutex);
2985
2986         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2987                                             lockdep_is_held(&mvm->mutex));
2988         if (WARN(csa_vif && csa_vif->csa_active,
2989                  "Another CSA is already in progress"))
2990                 goto out_unlock;
2991
2992         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2993                            chandef->center_freq1);
2994         rcu_assign_pointer(mvm->csa_vif, vif);
2995
2996 out_unlock:
2997         mutex_unlock(&mvm->mutex);
2998 }
2999
3000 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3001                               struct ieee80211_vif *vif, u32 queues, bool drop)
3002 {
3003         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3004         struct iwl_mvm_vif *mvmvif;
3005         struct iwl_mvm_sta *mvmsta;
3006
3007         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3008                 return;
3009
3010         mutex_lock(&mvm->mutex);
3011         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3012         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3013
3014         if (WARN_ON_ONCE(!mvmsta))
3015                 goto done;
3016
3017         if (drop) {
3018                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3019                         IWL_ERR(mvm, "flush request fail\n");
3020         } else {
3021                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3022                                               mvmsta->tfd_queue_msk);
3023         }
3024 done:
3025         mutex_unlock(&mvm->mutex);
3026 }
3027
3028 const struct ieee80211_ops iwl_mvm_hw_ops = {
3029         .tx = iwl_mvm_mac_tx,
3030         .ampdu_action = iwl_mvm_mac_ampdu_action,
3031         .start = iwl_mvm_mac_start,
3032         .restart_complete = iwl_mvm_mac_restart_complete,
3033         .stop = iwl_mvm_mac_stop,
3034         .add_interface = iwl_mvm_mac_add_interface,
3035         .remove_interface = iwl_mvm_mac_remove_interface,
3036         .config = iwl_mvm_mac_config,
3037         .prepare_multicast = iwl_mvm_prepare_multicast,
3038         .configure_filter = iwl_mvm_configure_filter,
3039         .bss_info_changed = iwl_mvm_bss_info_changed,
3040         .hw_scan = iwl_mvm_mac_hw_scan,
3041         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3042         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3043         .sta_state = iwl_mvm_mac_sta_state,
3044         .sta_notify = iwl_mvm_mac_sta_notify,
3045         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3046         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3047         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3048         .sta_rc_update = iwl_mvm_sta_rc_update,
3049         .conf_tx = iwl_mvm_mac_conf_tx,
3050         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3051         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3052         .flush = iwl_mvm_mac_flush,
3053         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3054         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3055         .set_key = iwl_mvm_mac_set_key,
3056         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3057         .remain_on_channel = iwl_mvm_roc,
3058         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3059         .add_chanctx = iwl_mvm_add_chanctx,
3060         .remove_chanctx = iwl_mvm_remove_chanctx,
3061         .change_chanctx = iwl_mvm_change_chanctx,
3062         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3063         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3064         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3065
3066         .start_ap = iwl_mvm_start_ap_ibss,
3067         .stop_ap = iwl_mvm_stop_ap_ibss,
3068         .join_ibss = iwl_mvm_start_ap_ibss,
3069         .leave_ibss = iwl_mvm_stop_ap_ibss,
3070
3071         .set_tim = iwl_mvm_set_tim,
3072
3073         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3074
3075         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3076
3077 #ifdef CONFIG_PM_SLEEP
3078         /* look at d3.c */
3079         .suspend = iwl_mvm_suspend,
3080         .resume = iwl_mvm_resume,
3081         .set_wakeup = iwl_mvm_set_wakeup,
3082         .set_rekey_data = iwl_mvm_set_rekey_data,
3083 #if IS_ENABLED(CONFIG_IPV6)
3084         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3085 #endif
3086         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3087 #endif
3088 };