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
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  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.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  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                 goto drop;
 531
 532         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 533         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 534                      ieee80211_is_mgmt(hdr->frame_control) &&
 535                      !ieee80211_is_deauth(hdr->frame_control) &&
 536                      !ieee80211_is_disassoc(hdr->frame_control) &&
 537                      !ieee80211_is_action(hdr->frame_control)))
 538                 sta = NULL;
 539
 540         if (sta) {
 541                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 542                         return;
 543                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 544                         goto drop;
 545                 return;
 546         }
 547
 548         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 549                 goto drop;
 550         return;
 551  drop:
 552         ieee80211_free_txskb(hw, skb);
 553 }
 554
 555 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 556 {
 557         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 558                 return false;
 559         return true;
 560 }
 561
 562 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 563 {
 564         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 565                 return false;
 566         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 567                 return true;
 568
 569         /* enabled by default */
 570         return true;
 571 }
 572
 573 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 574                                     struct ieee80211_vif *vif,
 575                                     enum ieee80211_ampdu_mlme_action action,
 576                                     struct ieee80211_sta *sta, u16 tid,
 577                                     u16 *ssn, u8 buf_size)
 578 {
 579         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 580         int ret;
 581         bool tx_agg_ref = false;
 582
 583         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 584                      sta->addr, tid, action);
 585
 586         if (!(mvm->nvm_data->sku_cap_11n_enable))
 587                 return -EACCES;
 588
 589         /* return from D0i3 before starting a new Tx aggregation */
 590         switch (action) {
 591         case IEEE80211_AMPDU_TX_START:
 592         case IEEE80211_AMPDU_TX_STOP_CONT:
 593         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 594         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 595         case IEEE80211_AMPDU_TX_OPERATIONAL:
 596                 /*
 597                  * for tx start, wait synchronously until D0i3 exit to
 598                  * get the correct sequence number for the tid.
 599                  * additionally, some other ampdu actions use direct
 600                  * target access, which is not handled automatically
 601                  * by the trans layer (unlike commands), so wait for
 602                  * d0i3 exit in these cases as well.
 603                  */
 604                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 605                 if (ret)
 606                         return ret;
 607
 608                 tx_agg_ref = true;
 609                 break;
 610         default:
 611                 break;
 612         }
 613
 614         mutex_lock(&mvm->mutex);
 615
 616         switch (action) {
 617         case IEEE80211_AMPDU_RX_START:
 618                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 619                         ret = -EINVAL;
 620                         break;
 621                 }
 622                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 623                 break;
 624         case IEEE80211_AMPDU_RX_STOP:
 625                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 626                 break;
 627         case IEEE80211_AMPDU_TX_START:
 628                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 629                         ret = -EINVAL;
 630                         break;
 631                 }
 632                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 633                 break;
 634         case IEEE80211_AMPDU_TX_STOP_CONT:
 635                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 636                 break;
 637         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 638         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 639                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 640                 break;
 641         case IEEE80211_AMPDU_TX_OPERATIONAL:
 642                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 643                 break;
 644         default:
 645                 WARN_ON_ONCE(1);
 646                 ret = -EINVAL;
 647                 break;
 648         }
 649         mutex_unlock(&mvm->mutex);
 650
 651         /*
 652          * If the tid is marked as started, we won't use it for offloaded
 653          * traffic on the next D0i3 entry. It's safe to unref.
 654          */
 655         if (tx_agg_ref)
 656                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 657
 658         return ret;
 659 }
 660
 661 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 662                                      struct ieee80211_vif *vif)
 663 {
 664         struct iwl_mvm *mvm = data;
 665         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 666
 667         mvmvif->uploaded = false;
 668         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 669
 670         /* does this make sense at all? */
 671         mvmvif->color++;
 672
 673         spin_lock_bh(&mvm->time_event_lock);
 674         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 675         spin_unlock_bh(&mvm->time_event_lock);
 676
 677         mvmvif->phy_ctxt = NULL;
 678         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 679 }
 680
 681 #ifdef CONFIG_IWLWIFI_DEBUGFS
 682 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 683 {
 684         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 685         struct iwl_fw_error_dump_file *dump_file;
 686         struct iwl_fw_error_dump_data *dump_data;
 687         struct iwl_fw_error_dump_info *dump_info;
 688         struct iwl_mvm_dump_ptrs *fw_error_dump;
 689         const struct fw_img *img;
 690         u32 sram_len, sram_ofs;
 691         u32 file_len, rxf_len;
 692         unsigned long flags;
 693         int reg_val;
 694
 695         lockdep_assert_held(&mvm->mutex);
 696
 697         if (mvm->fw_error_dump)
 698                 return;
 699
 700         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 701         if (!fw_error_dump)
 702                 return;
 703
 704         img = &mvm->fw->img[mvm->cur_ucode];
 705         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 706         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 707
 708         /* reading buffer size */
 709         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 710         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 711
 712         /* the register holds the value divided by 128 */
 713         rxf_len = rxf_len << 7;
 714
 715         file_len = sizeof(*dump_file) +
 716                    sizeof(*dump_data) * 3 +
 717                    sram_len +
 718                    rxf_len +
 719                    sizeof(*dump_info);
 720
 721         dump_file = vzalloc(file_len);
 722         if (!dump_file) {
 723                 kfree(fw_error_dump);
 724                 return;
 725         }
 726
 727         fw_error_dump->op_mode_ptr = dump_file;
 728
 729         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 730         dump_data = (void *)dump_file->data;
 731
 732         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 733         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 734         dump_info = (void *) dump_data->data;
 735         dump_info->device_family =
 736                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 737                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 738                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 739         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 740                sizeof(dump_info->fw_human_readable));
 741         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 742                 sizeof(dump_info->dev_human_readable));
 743         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 744                 sizeof(dump_info->bus_human_readable));
 745
 746         dump_data = iwl_fw_error_next_data(dump_data);
 747         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 748         dump_data->len = cpu_to_le32(rxf_len);
 749
 750         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 751                 u32 *rxf = (void *)dump_data->data;
 752                 int i;
 753
 754                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 755                         iwl_trans_write_prph(mvm->trans,
 756                                              RXF_LD_FENCE_OFFSET_ADDR,
 757                                              i * sizeof(u32));
 758                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 759                                                      RXF_FIFO_RD_FENCE_ADDR);
 760                 }
 761                 iwl_trans_release_nic_access(mvm->trans, &flags);
 762         }
 763
 764         dump_data = iwl_fw_error_next_data(dump_data);
 765         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 766         dump_data->len = cpu_to_le32(sram_len);
 767         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 768                                  sram_len);
 769
 770         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 771         fw_error_dump->op_mode_len = file_len;
 772         if (fw_error_dump->trans_ptr)
 773                 file_len += fw_error_dump->trans_ptr->len;
 774         dump_file->file_len = cpu_to_le32(file_len);
 775         mvm->fw_error_dump = fw_error_dump;
 776
 777         /* notify the userspace about the error we had */
 778         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 779 }
 780 #endif
 781
 782 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 783 {
 784         iwl_mvm_fw_error_dump(mvm);
 785
 786         iwl_trans_stop_device(mvm->trans);
 787
 788         mvm->scan_status = IWL_MVM_SCAN_NONE;
 789         mvm->ps_disabled = false;
 790
 791         /* just in case one was running */
 792         ieee80211_remain_on_channel_expired(mvm->hw);
 793
 794         ieee80211_iterate_active_interfaces_atomic(
 795                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 796                 iwl_mvm_cleanup_iterator, mvm);
 797
 798         mvm->p2p_device_vif = NULL;
 799         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 800
 801         iwl_mvm_reset_phy_ctxts(mvm);
 802         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 803         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 804         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 805         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 806         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 807         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 808         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 809         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 810
 811         ieee80211_wake_queues(mvm->hw);
 812
 813         /* cleanup all stale references (scan, roc), but keep the
 814          * ucode_down ref until reconfig is complete */
 815         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 816
 817         /* clear any stale d0i3 state */
 818         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 819
 820         mvm->vif_count = 0;
 821         mvm->rx_ba_sessions = 0;
 822 }
 823
 824 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 825 {
 826         int ret;
 827
 828         lockdep_assert_held(&mvm->mutex);
 829
 830         /* Clean up some internal and mac80211 state on restart */
 831         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 832                 iwl_mvm_restart_cleanup(mvm);
 833
 834         ret = iwl_mvm_up(mvm);
 835
 836         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 837                 /* Something went wrong - we need to finish some cleanup
 838                  * that normally iwl_mvm_mac_restart_complete() below
 839                  * would do.
 840                  */
 841                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 842                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 843         }
 844
 845         return ret;
 846 }
 847
 848 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 849 {
 850         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 851         int ret;
 852
 853         mutex_lock(&mvm->mutex);
 854         ret = __iwl_mvm_mac_start(mvm);
 855         mutex_unlock(&mvm->mutex);
 856
 857         return ret;
 858 }
 859
 860 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 861 {
 862         int ret;
 863
 864         mutex_lock(&mvm->mutex);
 865
 866         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 867         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 868         ret = iwl_mvm_update_quotas(mvm, NULL);
 869         if (ret)
 870                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 871                         ret);
 872
 873         /* allow transport/FW low power modes */
 874         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 875
 876         mutex_unlock(&mvm->mutex);
 877 }
 878
 879 static void
 880 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 881                               enum ieee80211_reconfig_type reconfig_type)
 882 {
 883         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 884
 885         switch (reconfig_type) {
 886         case IEEE80211_RECONFIG_TYPE_RESTART:
 887                 iwl_mvm_restart_complete(mvm);
 888                 break;
 889         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 890                 break;
 891         }
 892 }
 893
 894 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 895 {
 896         lockdep_assert_held(&mvm->mutex);
 897
 898         /* disallow low power states when the FW is down */
 899         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 900
 901         /* async_handlers_wk is now blocked */
 902
 903         /*
 904          * The work item could be running or queued if the
 905          * ROC time event stops just as we get here.
 906          */
 907         cancel_work_sync(&mvm->roc_done_wk);
 908
 909         iwl_trans_stop_device(mvm->trans);
 910
 911         iwl_mvm_async_handlers_purge(mvm);
 912         /* async_handlers_list is empty and will stay empty: HW is stopped */
 913
 914         /* the fw is stopped, the aux sta is dead: clean up driver state */
 915         iwl_mvm_del_aux_sta(mvm);
 916
 917         mvm->ucode_loaded = false;
 918 }
 919
 920 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 921 {
 922         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 923
 924         flush_work(&mvm->d0i3_exit_work);
 925         flush_work(&mvm->async_handlers_wk);
 926         flush_work(&mvm->fw_error_dump_wk);
 927
 928         mutex_lock(&mvm->mutex);
 929         __iwl_mvm_mac_stop(mvm);
 930         mutex_unlock(&mvm->mutex);
 931
 932         /*
 933          * The worker might have been waiting for the mutex, let it run and
 934          * discover that its list is now empty.
 935          */
 936         cancel_work_sync(&mvm->async_handlers_wk);
 937 }
 938
 939 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 940 {
 941         u16 i;
 942
 943         lockdep_assert_held(&mvm->mutex);
 944
 945         for (i = 0; i < NUM_PHY_CTX; i++)
 946                 if (!mvm->phy_ctxts[i].ref)
 947                         return &mvm->phy_ctxts[i];
 948
 949         IWL_ERR(mvm, "No available PHY context\n");
 950         return NULL;
 951 }
 952
 953 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 954                                 s8 tx_power)
 955 {
 956         /* FW is in charge of regulatory enforcement */
 957         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 958                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 959                 .pwr_restriction = cpu_to_le16(tx_power),
 960         };
 961
 962         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 963                                     sizeof(reduce_txpwr_cmd),
 964                                     &reduce_txpwr_cmd);
 965 }
 966
 967 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 968                                      struct ieee80211_vif *vif)
 969 {
 970         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 971         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 972         int ret;
 973
 974         /*
 975          * make sure D0i3 exit is completed, otherwise a target access
 976          * during tx queue configuration could be done when still in
 977          * D0i3 state.
 978          */
 979         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 980         if (ret)
 981                 return ret;
 982
 983         /*
 984          * Not much to do here. The stack will not allow interface
 985          * types or combinations that we didn't advertise, so we
 986          * don't really have to check the types.
 987          */
 988
 989         mutex_lock(&mvm->mutex);
 990
 991         /* Allocate resources for the MAC context, and add it to the fw  */
 992         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 993         if (ret)
 994                 goto out_unlock;
 995
 996         /* Counting number of interfaces is needed for legacy PM */
 997         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 998                 mvm->vif_count++;
 999
1000         /*
1001          * The AP binding flow can be done only after the beacon
1002          * template is configured (which happens only in the mac80211
1003          * start_ap() flow), and adding the broadcast station can happen
1004          * only after the binding.
1005          * In addition, since modifying the MAC before adding a bcast
1006          * station is not allowed by the FW, delay the adding of MAC context to
1007          * the point where we can also add the bcast station.
1008          * In short: there's not much we can do at this point, other than
1009          * allocating resources :)
1010          */
1011         if (vif->type == NL80211_IFTYPE_AP ||
1012             vif->type == NL80211_IFTYPE_ADHOC) {
1013                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1014                 if (ret) {
1015                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1016                         goto out_release;
1017                 }
1018
1019                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1020                 goto out_unlock;
1021         }
1022
1023         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1024         if (ret)
1025                 goto out_release;
1026
1027         ret = iwl_mvm_power_update_mac(mvm);
1028         if (ret)
1029                 goto out_release;
1030
1031         /* beacon filtering */
1032         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1033         if (ret)
1034                 goto out_remove_mac;
1035
1036         if (!mvm->bf_allowed_vif &&
1037             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1038                 mvm->bf_allowed_vif = mvmvif;
1039                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1040                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1041         }
1042
1043         /*
1044          * P2P_DEVICE interface does not have a channel context assigned to it,
1045          * so a dedicated PHY context is allocated to it and the corresponding
1046          * MAC context is bound to it at this stage.
1047          */
1048         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1049
1050                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1051                 if (!mvmvif->phy_ctxt) {
1052                         ret = -ENOSPC;
1053                         goto out_free_bf;
1054                 }
1055
1056                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1057                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1058                 if (ret)
1059                         goto out_unref_phy;
1060
1061                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1062                 if (ret)
1063                         goto out_unbind;
1064
1065                 /* Save a pointer to p2p device vif, so it can later be used to
1066                  * update the p2p device MAC when a GO is started/stopped */
1067                 mvm->p2p_device_vif = vif;
1068         }
1069
1070         iwl_mvm_vif_dbgfs_register(mvm, vif);
1071         goto out_unlock;
1072
1073  out_unbind:
1074         iwl_mvm_binding_remove_vif(mvm, vif);
1075  out_unref_phy:
1076         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1077  out_free_bf:
1078         if (mvm->bf_allowed_vif == mvmvif) {
1079                 mvm->bf_allowed_vif = NULL;
1080                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1081                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1082         }
1083  out_remove_mac:
1084         mvmvif->phy_ctxt = NULL;
1085         iwl_mvm_mac_ctxt_remove(mvm, vif);
1086  out_release:
1087         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1088                 mvm->vif_count--;
1089
1090         iwl_mvm_mac_ctxt_release(mvm, vif);
1091  out_unlock:
1092         mutex_unlock(&mvm->mutex);
1093
1094         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1095
1096         return ret;
1097 }
1098
1099 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1100                                         struct ieee80211_vif *vif)
1101 {
1102         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1103
1104         if (tfd_msk) {
1105                 mutex_lock(&mvm->mutex);
1106                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1107                 mutex_unlock(&mvm->mutex);
1108         }
1109
1110         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1111                 /*
1112                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1113                  * We assume here that all the packets sent to the OFFCHANNEL
1114                  * queue are sent in ROC session.
1115                  */
1116                 flush_work(&mvm->roc_done_wk);
1117         } else {
1118                 /*
1119                  * By now, all the AC queues are empty. The AGG queues are
1120                  * empty too. We already got all the Tx responses for all the
1121                  * packets in the queues. The drain work can have been
1122                  * triggered. Flush it.
1123                  */
1124                 flush_work(&mvm->sta_drained_wk);
1125         }
1126 }
1127
1128 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1129                                          struct ieee80211_vif *vif)
1130 {
1131         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1132         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1133
1134         iwl_mvm_prepare_mac_removal(mvm, vif);
1135
1136         mutex_lock(&mvm->mutex);
1137
1138         if (mvm->bf_allowed_vif == mvmvif) {
1139                 mvm->bf_allowed_vif = NULL;
1140                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1141                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1142         }
1143
1144         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1145
1146         /*
1147          * For AP/GO interface, the tear down of the resources allocated to the
1148          * interface is be handled as part of the stop_ap flow.
1149          */
1150         if (vif->type == NL80211_IFTYPE_AP ||
1151             vif->type == NL80211_IFTYPE_ADHOC) {
1152 #ifdef CONFIG_NL80211_TESTMODE
1153                 if (vif == mvm->noa_vif) {
1154                         mvm->noa_vif = NULL;
1155                         mvm->noa_duration = 0;
1156                 }
1157 #endif
1158                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1159                 goto out_release;
1160         }
1161
1162         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1163                 mvm->p2p_device_vif = NULL;
1164                 iwl_mvm_rm_bcast_sta(mvm, vif);
1165                 iwl_mvm_binding_remove_vif(mvm, vif);
1166                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1167                 mvmvif->phy_ctxt = NULL;
1168         }
1169
1170         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1171                 mvm->vif_count--;
1172
1173         iwl_mvm_power_update_mac(mvm);
1174         iwl_mvm_mac_ctxt_remove(mvm, vif);
1175
1176 out_release:
1177         iwl_mvm_mac_ctxt_release(mvm, vif);
1178         mutex_unlock(&mvm->mutex);
1179 }
1180
1181 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1182 {
1183         return 0;
1184 }
1185
1186 struct iwl_mvm_mc_iter_data {
1187         struct iwl_mvm *mvm;
1188         int port_id;
1189 };
1190
1191 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1192                                       struct ieee80211_vif *vif)
1193 {
1194         struct iwl_mvm_mc_iter_data *data = _data;
1195         struct iwl_mvm *mvm = data->mvm;
1196         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1197         int ret, len;
1198
1199         /* if we don't have free ports, mcast frames will be dropped */
1200         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1201                 return;
1202
1203         if (vif->type != NL80211_IFTYPE_STATION ||
1204             !vif->bss_conf.assoc)
1205                 return;
1206
1207         cmd->port_id = data->port_id++;
1208         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1209         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1210
1211         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1212         if (ret)
1213                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1214 }
1215
1216 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1217 {
1218         struct iwl_mvm_mc_iter_data iter_data = {
1219                 .mvm = mvm,
1220         };
1221
1222         lockdep_assert_held(&mvm->mutex);
1223
1224         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1225                 return;
1226
1227         ieee80211_iterate_active_interfaces_atomic(
1228                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1229                 iwl_mvm_mc_iface_iterator, &iter_data);
1230 }
1231
1232 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1233                                      struct netdev_hw_addr_list *mc_list)
1234 {
1235         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1236         struct iwl_mcast_filter_cmd *cmd;
1237         struct netdev_hw_addr *addr;
1238         int addr_count;
1239         bool pass_all;
1240         int len;
1241
1242         addr_count = netdev_hw_addr_list_count(mc_list);
1243         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1244                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1245         if (pass_all)
1246                 addr_count = 0;
1247
1248         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1249         cmd = kzalloc(len, GFP_ATOMIC);
1250         if (!cmd)
1251                 return 0;
1252
1253         if (pass_all) {
1254                 cmd->pass_all = 1;
1255                 return (u64)(unsigned long)cmd;
1256         }
1257
1258         netdev_hw_addr_list_for_each(addr, mc_list) {
1259                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1260                                    cmd->count, addr->addr);
1261                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1262                        addr->addr, ETH_ALEN);
1263                 cmd->count++;
1264         }
1265
1266         return (u64)(unsigned long)cmd;
1267 }
1268
1269 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1270                                      unsigned int changed_flags,
1271                                      unsigned int *total_flags,
1272                                      u64 multicast)
1273 {
1274         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1275         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1276
1277         mutex_lock(&mvm->mutex);
1278
1279         /* replace previous configuration */
1280         kfree(mvm->mcast_filter_cmd);
1281         mvm->mcast_filter_cmd = cmd;
1282
1283         if (!cmd)
1284                 goto out;
1285
1286         iwl_mvm_recalc_multicast(mvm);
1287 out:
1288         mutex_unlock(&mvm->mutex);
1289         *total_flags = 0;
1290 }
1291
1292 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1293 struct iwl_bcast_iter_data {
1294         struct iwl_mvm *mvm;
1295         struct iwl_bcast_filter_cmd *cmd;
1296         u8 current_filter;
1297 };
1298
1299 static void
1300 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1301                          const struct iwl_fw_bcast_filter *in_filter,
1302                          struct iwl_fw_bcast_filter *out_filter)
1303 {
1304         struct iwl_fw_bcast_filter_attr *attr;
1305         int i;
1306
1307         memcpy(out_filter, in_filter, sizeof(*out_filter));
1308
1309         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1310                 attr = &out_filter->attrs[i];
1311
1312                 if (!attr->mask)
1313                         break;
1314
1315                 switch (attr->reserved1) {
1316                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1317                         if (vif->bss_conf.arp_addr_cnt != 1) {
1318                                 attr->mask = 0;
1319                                 continue;
1320                         }
1321
1322                         attr->val = vif->bss_conf.arp_addr_list[0];
1323                         break;
1324                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1325                         attr->val = *(__be32 *)&vif->addr[2];
1326                         break;
1327                 default:
1328                         break;
1329                 }
1330                 attr->reserved1 = 0;
1331                 out_filter->num_attrs++;
1332         }
1333 }
1334
1335 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1336                                           struct ieee80211_vif *vif)
1337 {
1338         struct iwl_bcast_iter_data *data = _data;
1339         struct iwl_mvm *mvm = data->mvm;
1340         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1341         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1342         struct iwl_fw_bcast_mac *bcast_mac;
1343         int i;
1344
1345         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1346                 return;
1347
1348         bcast_mac = &cmd->macs[mvmvif->id];
1349
1350         /*
1351          * enable filtering only for associated stations, but not for P2P
1352          * Clients
1353          */
1354         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1355             !vif->bss_conf.assoc)
1356                 return;
1357
1358         bcast_mac->default_discard = 1;
1359
1360         /* copy all configured filters */
1361         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1362                 /*
1363                  * Make sure we don't exceed our filters limit.
1364                  * if there is still a valid filter to be configured,
1365                  * be on the safe side and just allow bcast for this mac.
1366                  */
1367                 if (WARN_ON_ONCE(data->current_filter >=
1368                                  ARRAY_SIZE(cmd->filters))) {
1369                         bcast_mac->default_discard = 0;
1370                         bcast_mac->attached_filters = 0;
1371                         break;
1372                 }
1373
1374                 iwl_mvm_set_bcast_filter(vif,
1375                                          &mvm->bcast_filters[i],
1376                                          &cmd->filters[data->current_filter]);
1377
1378                 /* skip current filter if it contains no attributes */
1379                 if (!cmd->filters[data->current_filter].num_attrs)
1380                         continue;
1381
1382                 /* attach the filter to current mac */
1383                 bcast_mac->attached_filters |=
1384                                 cpu_to_le16(BIT(data->current_filter));
1385
1386                 data->current_filter++;
1387         }
1388 }
1389
1390 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1391                                     struct iwl_bcast_filter_cmd *cmd)
1392 {
1393         struct iwl_bcast_iter_data iter_data = {
1394                 .mvm = mvm,
1395                 .cmd = cmd,
1396         };
1397
1398         memset(cmd, 0, sizeof(*cmd));
1399         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1400         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1401
1402 #ifdef CONFIG_IWLWIFI_DEBUGFS
1403         /* use debugfs filters/macs if override is configured */
1404         if (mvm->dbgfs_bcast_filtering.override) {
1405                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1406                        sizeof(cmd->filters));
1407                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1408                        sizeof(cmd->macs));
1409                 return true;
1410         }
1411 #endif
1412
1413         /* if no filters are configured, do nothing */
1414         if (!mvm->bcast_filters)
1415                 return false;
1416
1417         /* configure and attach these filters for each associated sta vif */
1418         ieee80211_iterate_active_interfaces(
1419                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1420                 iwl_mvm_bcast_filter_iterator, &iter_data);
1421
1422         return true;
1423 }
1424 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1425                                           struct ieee80211_vif *vif)
1426 {
1427         struct iwl_bcast_filter_cmd cmd;
1428
1429         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1430                 return 0;
1431
1432         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1433                 return 0;
1434
1435         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1436                                     sizeof(cmd), &cmd);
1437 }
1438 #else
1439 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1440                                                  struct ieee80211_vif *vif)
1441 {
1442         return 0;
1443 }
1444 #endif
1445
1446 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1447                                              struct ieee80211_vif *vif,
1448                                              struct ieee80211_bss_conf *bss_conf,
1449                                              u32 changes)
1450 {
1451         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1452         int ret;
1453
1454         /*
1455          * Re-calculate the tsf id, as the master-slave relations depend on the
1456          * beacon interval, which was not known when the station interface was
1457          * added.
1458          */
1459         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1460                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1461
1462         /*
1463          * If we're not associated yet, take the (new) BSSID before associating
1464          * so the firmware knows. If we're already associated, then use the old
1465          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1466          * branch for disassociation below.
1467          */
1468         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1469                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1470
1471         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1472         if (ret)
1473                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1474
1475         /* after sending it once, adopt mac80211 data */
1476         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1477         mvmvif->associated = bss_conf->assoc;
1478
1479         if (changes & BSS_CHANGED_ASSOC) {
1480                 if (bss_conf->assoc) {
1481                         /* add quota for this interface */
1482                         ret = iwl_mvm_update_quotas(mvm, NULL);
1483                         if (ret) {
1484                                 IWL_ERR(mvm, "failed to update quotas\n");
1485                                 return;
1486                         }
1487
1488                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1489                                      &mvm->status)) {
1490                                 /*
1491                                  * If we're restarting then the firmware will
1492                                  * obviously have lost synchronisation with
1493                                  * the AP. It will attempt to synchronise by
1494                                  * itself, but we can make it more reliable by
1495                                  * scheduling a session protection time event.
1496                                  *
1497                                  * The firmware needs to receive a beacon to
1498                                  * catch up with synchronisation, use 110% of
1499                                  * the beacon interval.
1500                                  *
1501                                  * Set a large maximum delay to allow for more
1502                                  * than a single interface.
1503                                  */
1504                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1505                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1506                                                         5 * dur, false);
1507                         }
1508
1509                         iwl_mvm_sf_update(mvm, vif, false);
1510                         iwl_mvm_power_vif_assoc(mvm, vif);
1511                         if (vif->p2p) {
1512                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1513                                 iwl_mvm_update_smps(mvm, vif,
1514                                                     IWL_MVM_SMPS_REQ_PROT,
1515                                                     IEEE80211_SMPS_DYNAMIC);
1516                         }
1517                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1518                         /*
1519                          * If update fails - SF might be running in associated
1520                          * mode while disassociated - which is forbidden.
1521                          */
1522                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1523                                   "Failed to update SF upon disassociation\n");
1524
1525                         /* remove AP station now that the MAC is unassoc */
1526                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1527                         if (ret)
1528                                 IWL_ERR(mvm, "failed to remove AP station\n");
1529
1530                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1531                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1532                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1533                         /* remove quota for this interface */
1534                         ret = iwl_mvm_update_quotas(mvm, NULL);
1535                         if (ret)
1536                                 IWL_ERR(mvm, "failed to update quotas\n");
1537
1538                         if (vif->p2p)
1539                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1540
1541                         /* this will take the cleared BSSID from bss_conf */
1542                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1543                         if (ret)
1544                                 IWL_ERR(mvm,
1545                                         "failed to update MAC %pM (clear after unassoc)\n",
1546                                         vif->addr);
1547                 }
1548
1549                 iwl_mvm_recalc_multicast(mvm);
1550                 iwl_mvm_configure_bcast_filter(mvm, vif);
1551
1552                 /* reset rssi values */
1553                 mvmvif->bf_data.ave_beacon_signal = 0;
1554
1555                 iwl_mvm_bt_coex_vif_change(mvm);
1556                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1557                                     IEEE80211_SMPS_AUTOMATIC);
1558         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1559                 /*
1560                  * We received a beacon _after_ association so
1561                  * remove the session protection.
1562                  */
1563                 iwl_mvm_remove_time_event(mvm, mvmvif,
1564                                           &mvmvif->time_event_data);
1565         }
1566
1567         if (changes & BSS_CHANGED_BEACON_INFO) {
1568                 iwl_mvm_sf_update(mvm, vif, false);
1569                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1570         }
1571
1572         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1573                 ret = iwl_mvm_power_update_mac(mvm);
1574                 if (ret)
1575                         IWL_ERR(mvm, "failed to update power mode\n");
1576         }
1577
1578         if (changes & BSS_CHANGED_TXPOWER) {
1579                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1580                                 bss_conf->txpower);
1581                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1582         }
1583
1584         if (changes & BSS_CHANGED_CQM) {
1585                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1586                 /* reset cqm events tracking */
1587                 mvmvif->bf_data.last_cqm_event = 0;
1588                 if (mvmvif->bf_data.bf_enabled) {
1589                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1590                         if (ret)
1591                                 IWL_ERR(mvm,
1592                                         "failed to update CQM thresholds\n");
1593                 }
1594         }
1595
1596         if (changes & BSS_CHANGED_ARP_FILTER) {
1597                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1598                 iwl_mvm_configure_bcast_filter(mvm, vif);
1599         }
1600 }
1601
1602 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1603                                  struct ieee80211_vif *vif)
1604 {
1605         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1606         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1607         int ret;
1608
1609         /*
1610          * iwl_mvm_mac_ctxt_add() might read directly from the device
1611          * (the system time), so make sure it is available.
1612          */
1613         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1614         if (ret)
1615                 return ret;
1616
1617         mutex_lock(&mvm->mutex);
1618
1619         /* Send the beacon template */
1620         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1621         if (ret)
1622                 goto out_unlock;
1623
1624         /*
1625          * Re-calculate the tsf id, as the master-slave relations depend on the
1626          * beacon interval, which was not known when the AP interface was added.
1627          */
1628         if (vif->type == NL80211_IFTYPE_AP)
1629                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1630
1631         /* Add the mac context */
1632         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1633         if (ret)
1634                 goto out_unlock;
1635
1636         /* Perform the binding */
1637         ret = iwl_mvm_binding_add_vif(mvm, vif);
1638         if (ret)
1639                 goto out_remove;
1640
1641         /* Send the bcast station. At this stage the TBTT and DTIM time events
1642          * are added and applied to the scheduler */
1643         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1644         if (ret)
1645                 goto out_unbind;
1646
1647         /* must be set before quota calculations */
1648         mvmvif->ap_ibss_active = true;
1649
1650         /* power updated needs to be done before quotas */
1651         iwl_mvm_power_update_mac(mvm);
1652
1653         ret = iwl_mvm_update_quotas(mvm, NULL);
1654         if (ret)
1655                 goto out_quota_failed;
1656
1657         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1658         if (vif->p2p && mvm->p2p_device_vif)
1659                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1660
1661         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1662
1663         iwl_mvm_bt_coex_vif_change(mvm);
1664
1665         /* we don't support TDLS during DCM */
1666         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1667                 iwl_mvm_teardown_tdls_peers(mvm);
1668
1669         mutex_unlock(&mvm->mutex);
1670         return 0;
1671
1672 out_quota_failed:
1673         iwl_mvm_power_update_mac(mvm);
1674         mvmvif->ap_ibss_active = false;
1675         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1676 out_unbind:
1677         iwl_mvm_binding_remove_vif(mvm, vif);
1678 out_remove:
1679         iwl_mvm_mac_ctxt_remove(mvm, vif);
1680 out_unlock:
1681         mutex_unlock(&mvm->mutex);
1682         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1683         return ret;
1684 }
1685
1686 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1687                                  struct ieee80211_vif *vif)
1688 {
1689         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1690         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1691
1692         iwl_mvm_prepare_mac_removal(mvm, vif);
1693
1694         mutex_lock(&mvm->mutex);
1695
1696         /* Handle AP stop while in CSA */
1697         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1698                 iwl_mvm_remove_time_event(mvm, mvmvif,
1699                                           &mvmvif->time_event_data);
1700                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1701         }
1702
1703         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1704                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1705                 mvm->csa_tx_block_bcn_timeout = 0;
1706         }
1707
1708         mvmvif->ap_ibss_active = false;
1709         mvm->ap_last_beacon_gp2 = 0;
1710
1711         iwl_mvm_bt_coex_vif_change(mvm);
1712
1713         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1714
1715         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1716         if (vif->p2p && mvm->p2p_device_vif)
1717                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1718
1719         iwl_mvm_update_quotas(mvm, NULL);
1720         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1721         iwl_mvm_binding_remove_vif(mvm, vif);
1722
1723         iwl_mvm_power_update_mac(mvm);
1724
1725         iwl_mvm_mac_ctxt_remove(mvm, vif);
1726
1727         mutex_unlock(&mvm->mutex);
1728 }
1729
1730 static void
1731 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1732                                  struct ieee80211_vif *vif,
1733                                  struct ieee80211_bss_conf *bss_conf,
1734                                  u32 changes)
1735 {
1736         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1737
1738         /* Changes will be applied when the AP/IBSS is started */
1739         if (!mvmvif->ap_ibss_active)
1740                 return;
1741
1742         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1743                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1744             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1745                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1746
1747         /* Need to send a new beacon template to the FW */
1748         if (changes & BSS_CHANGED_BEACON &&
1749             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1750                 IWL_WARN(mvm, "Failed updating beacon data\n");
1751 }
1752
1753 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1754                                      struct ieee80211_vif *vif,
1755                                      struct ieee80211_bss_conf *bss_conf,
1756                                      u32 changes)
1757 {
1758         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1759
1760         /*
1761          * iwl_mvm_bss_info_changed_station() might call
1762          * iwl_mvm_protect_session(), which reads directly from
1763          * the device (the system time), so make sure it is available.
1764          */
1765         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1766                 return;
1767
1768         mutex_lock(&mvm->mutex);
1769
1770         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1771                 iwl_mvm_scan_offload_stop(mvm, true);
1772
1773         switch (vif->type) {
1774         case NL80211_IFTYPE_STATION:
1775                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1776                 break;
1777         case NL80211_IFTYPE_AP:
1778         case NL80211_IFTYPE_ADHOC:
1779                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1780                 break;
1781         default:
1782                 /* shouldn't happen */
1783                 WARN_ON_ONCE(1);
1784         }
1785
1786         mutex_unlock(&mvm->mutex);
1787         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1788 }
1789
1790 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1791                                           enum iwl_scan_status scan_type)
1792 {
1793         int ret;
1794         bool wait_for_handlers = false;
1795
1796         mutex_lock(&mvm->mutex);
1797
1798         if (mvm->scan_status != scan_type) {
1799                 ret = 0;
1800                 /* make sure there are no pending notifications */
1801                 wait_for_handlers = true;
1802                 goto out;
1803         }
1804
1805         switch (scan_type) {
1806         case IWL_MVM_SCAN_SCHED:
1807                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1808                 break;
1809         case IWL_MVM_SCAN_OS:
1810                 ret = iwl_mvm_cancel_scan(mvm);
1811                 break;
1812         case IWL_MVM_SCAN_NONE:
1813         default:
1814                 WARN_ON_ONCE(1);
1815                 ret = -EINVAL;
1816                 break;
1817         }
1818         if (ret)
1819                 goto out;
1820
1821         wait_for_handlers = true;
1822 out:
1823         mutex_unlock(&mvm->mutex);
1824
1825         /* make sure we consume the completion notification */
1826         if (wait_for_handlers)
1827                 iwl_mvm_wait_for_async_handlers(mvm);
1828
1829         return ret;
1830 }
1831 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1832                                struct ieee80211_vif *vif,
1833                                struct ieee80211_scan_request *hw_req)
1834 {
1835         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1836         struct cfg80211_scan_request *req = &hw_req->req;
1837         int ret;
1838
1839         if (req->n_channels == 0 ||
1840             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1841                 return -EINVAL;
1842
1843         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1844         if (ret)
1845                 return ret;
1846
1847         mutex_lock(&mvm->mutex);
1848
1849         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1850                 ret = -EBUSY;
1851                 goto out;
1852         }
1853
1854         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1855
1856         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1857                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1858         else
1859                 ret = iwl_mvm_scan_request(mvm, vif, req);
1860
1861         if (ret)
1862                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1863 out:
1864         mutex_unlock(&mvm->mutex);
1865         return ret;
1866 }
1867
1868 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1869                                        struct ieee80211_vif *vif)
1870 {
1871         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1872
1873         mutex_lock(&mvm->mutex);
1874
1875         iwl_mvm_cancel_scan(mvm);
1876
1877         mutex_unlock(&mvm->mutex);
1878 }
1879
1880 static void
1881 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1882                                   struct ieee80211_sta *sta, u16 tids,
1883                                   int num_frames,
1884                                   enum ieee80211_frame_release_type reason,
1885                                   bool more_data)
1886 {
1887         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1888
1889         /* Called when we need to transmit (a) frame(s) from mac80211 */
1890
1891         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1892                                           tids, more_data, false);
1893 }
1894
1895 static void
1896 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1897                                     struct ieee80211_sta *sta, u16 tids,
1898                                     int num_frames,
1899                                     enum ieee80211_frame_release_type reason,
1900                                     bool more_data)
1901 {
1902         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1903
1904         /* Called when we need to transmit (a) frame(s) from agg queue */
1905
1906         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1907                                           tids, more_data, true);
1908 }
1909
1910 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1911                                    struct ieee80211_vif *vif,
1912                                    enum sta_notify_cmd cmd,
1913                                    struct ieee80211_sta *sta)
1914 {
1915         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1916         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1917         int tid;
1918
1919         switch (cmd) {
1920         case STA_NOTIFY_SLEEP:
1921                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1922                         ieee80211_sta_block_awake(hw, sta, true);
1923                 spin_lock_bh(&mvmsta->lock);
1924                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1925                         struct iwl_mvm_tid_data *tid_data;
1926
1927                         tid_data = &mvmsta->tid_data[tid];
1928                         if (tid_data->state != IWL_AGG_ON &&
1929                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1930                                 continue;
1931                         if (iwl_mvm_tid_queued(tid_data) == 0)
1932                                 continue;
1933                         ieee80211_sta_set_buffered(sta, tid, true);
1934                 }
1935                 spin_unlock_bh(&mvmsta->lock);
1936                 /*
1937                  * The fw updates the STA to be asleep. Tx packets on the Tx
1938                  * queues to this station will not be transmitted. The fw will
1939                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1940                  */
1941                 break;
1942         case STA_NOTIFY_AWAKE:
1943                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1944                         break;
1945                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1946                 break;
1947         default:
1948                 break;
1949         }
1950 }
1951
1952 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1953                                        struct ieee80211_vif *vif,
1954                                        struct ieee80211_sta *sta)
1955 {
1956         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1957         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1958
1959         /*
1960          * This is called before mac80211 does RCU synchronisation,
1961          * so here we already invalidate our internal RCU-protected
1962          * station pointer. The rest of the code will thus no longer
1963          * be able to find the station this way, and we don't rely
1964          * on further RCU synchronisation after the sta_state()
1965          * callback deleted the station.
1966          */
1967         mutex_lock(&mvm->mutex);
1968         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1969                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1970                                    ERR_PTR(-ENOENT));
1971         mutex_unlock(&mvm->mutex);
1972 }
1973
1974 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1975                                  struct ieee80211_vif *vif,
1976                                  struct ieee80211_sta *sta,
1977                                  enum ieee80211_sta_state old_state,
1978                                  enum ieee80211_sta_state new_state)
1979 {
1980         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1981         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1982         int ret;
1983
1984         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1985                            sta->addr, old_state, new_state);
1986
1987         /* this would be a mac80211 bug ... but don't crash */
1988         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1989                 return -EINVAL;
1990
1991         /* if a STA is being removed, reuse its ID */
1992         flush_work(&mvm->sta_drained_wk);
1993
1994         mutex_lock(&mvm->mutex);
1995         if (old_state == IEEE80211_STA_NOTEXIST &&
1996             new_state == IEEE80211_STA_NONE) {
1997                 /*
1998                  * Firmware bug - it'll crash if the beacon interval is less
1999                  * than 16. We can't avoid connecting at all, so refuse the
2000                  * station state change, this will cause mac80211 to abandon
2001                  * attempts to connect to this AP, and eventually wpa_s will
2002                  * blacklist the AP...
2003                  */
2004                 if (vif->type == NL80211_IFTYPE_STATION &&
2005                     vif->bss_conf.beacon_int < 16) {
2006                         IWL_ERR(mvm,
2007                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2008                                 sta->addr, vif->bss_conf.beacon_int);
2009                         ret = -EINVAL;
2010                         goto out_unlock;
2011                 }
2012
2013                 if (sta->tdls &&
2014                     (vif->p2p ||
2015                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2016                                                 IWL_MVM_TDLS_STA_COUNT ||
2017                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2018                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2019                         ret = -EBUSY;
2020                         goto out_unlock;
2021                 }
2022
2023                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2024                 if (sta->tdls && ret == 0)
2025                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2026         } else if (old_state == IEEE80211_STA_NONE &&
2027                    new_state == IEEE80211_STA_AUTH) {
2028                 /*
2029                  * EBS may be disabled due to previous failures reported by FW.
2030                  * Reset EBS status here assuming environment has been changed.
2031                  */
2032                 mvm->last_ebs_successful = true;
2033                 ret = 0;
2034         } else if (old_state == IEEE80211_STA_AUTH &&
2035                    new_state == IEEE80211_STA_ASSOC) {
2036                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2037                 if (ret == 0)
2038                         iwl_mvm_rs_rate_init(mvm, sta,
2039                                              mvmvif->phy_ctxt->channel->band,
2040                                              true);
2041         } else if (old_state == IEEE80211_STA_ASSOC &&
2042                    new_state == IEEE80211_STA_AUTHORIZED) {
2043
2044                 /* we don't support TDLS during DCM */
2045                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2046                         iwl_mvm_teardown_tdls_peers(mvm);
2047
2048                 /* enable beacon filtering */
2049                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2050                 ret = 0;
2051         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2052                    new_state == IEEE80211_STA_ASSOC) {
2053                 /* disable beacon filtering */
2054                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2055                 ret = 0;
2056         } else if (old_state == IEEE80211_STA_ASSOC &&
2057                    new_state == IEEE80211_STA_AUTH) {
2058                 ret = 0;
2059         } else if (old_state == IEEE80211_STA_AUTH &&
2060                    new_state == IEEE80211_STA_NONE) {
2061                 ret = 0;
2062         } else if (old_state == IEEE80211_STA_NONE &&
2063                    new_state == IEEE80211_STA_NOTEXIST) {
2064                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2065                 if (sta->tdls)
2066                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2067         } else {
2068                 ret = -EIO;
2069         }
2070  out_unlock:
2071         mutex_unlock(&mvm->mutex);
2072
2073         return ret;
2074 }
2075
2076 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2077 {
2078         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2079
2080         mvm->rts_threshold = value;
2081
2082         return 0;
2083 }
2084
2085 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2086                                   struct ieee80211_vif *vif,
2087                                   struct ieee80211_sta *sta, u32 changed)
2088 {
2089         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2090
2091         if (vif->type == NL80211_IFTYPE_STATION &&
2092             changed & IEEE80211_RC_NSS_CHANGED)
2093                 iwl_mvm_sf_update(mvm, vif, false);
2094 }
2095
2096 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2097                                struct ieee80211_vif *vif, u16 ac,
2098                                const struct ieee80211_tx_queue_params *params)
2099 {
2100         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2101         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2102
2103         mvmvif->queue_params[ac] = *params;
2104
2105         /*
2106          * No need to update right away, we'll get BSS_CHANGED_QOS
2107          * The exception is P2P_DEVICE interface which needs immediate update.
2108          */
2109         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2110                 int ret;
2111
2112                 mutex_lock(&mvm->mutex);
2113                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2114                 mutex_unlock(&mvm->mutex);
2115                 return ret;
2116         }
2117         return 0;
2118 }
2119
2120 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2121                                       struct ieee80211_vif *vif)
2122 {
2123         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2124         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2125                            200 + vif->bss_conf.beacon_int);
2126         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2127                                100 + vif->bss_conf.beacon_int);
2128
2129         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2130                 return;
2131
2132         /*
2133          * iwl_mvm_protect_session() reads directly from the device
2134          * (the system time), so make sure it is available.
2135          */
2136         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2137                 return;
2138
2139         mutex_lock(&mvm->mutex);
2140         /* Try really hard to protect the session and hear a beacon */
2141         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2142         mutex_unlock(&mvm->mutex);
2143
2144         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2145 }
2146
2147 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2148                                         struct ieee80211_vif *vif,
2149                                         struct cfg80211_sched_scan_request *req,
2150                                         struct ieee80211_scan_ies *ies)
2151 {
2152         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2153         int ret;
2154
2155         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2156         if (ret)
2157                 return ret;
2158
2159         mutex_lock(&mvm->mutex);
2160
2161         /* Newest FW fixes sched scan while connected on another interface */
2162         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2163                 if (!vif->bss_conf.idle) {
2164                         ret = -EBUSY;
2165                         goto out;
2166                 }
2167         } else if (!iwl_mvm_is_idle(mvm)) {
2168                 ret = -EBUSY;
2169                 goto out;
2170         }
2171
2172         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2173                 ret = -EBUSY;
2174                 goto out;
2175         }
2176
2177         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2178
2179         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2180                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2181                 if (ret)
2182                         goto err;
2183         }
2184
2185         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2186         if (ret)
2187                 goto err;
2188
2189         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2190                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2191         else
2192                 ret = iwl_mvm_sched_scan_start(mvm, req);
2193
2194         if (!ret)
2195                 goto out;
2196 err:
2197         mvm->scan_status = IWL_MVM_SCAN_NONE;
2198 out:
2199         mutex_unlock(&mvm->mutex);
2200         return ret;
2201 }
2202
2203 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2204                                        struct ieee80211_vif *vif)
2205 {
2206         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2207         int ret;
2208
2209         mutex_lock(&mvm->mutex);
2210         ret = iwl_mvm_scan_offload_stop(mvm, false);
2211         mutex_unlock(&mvm->mutex);
2212         iwl_mvm_wait_for_async_handlers(mvm);
2213
2214         return ret;
2215 }
2216
2217 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2218                                enum set_key_cmd cmd,
2219                                struct ieee80211_vif *vif,
2220                                struct ieee80211_sta *sta,
2221                                struct ieee80211_key_conf *key)
2222 {
2223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2224         int ret;
2225
2226         if (iwlwifi_mod_params.sw_crypto) {
2227                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2228                 return -EOPNOTSUPP;
2229         }
2230
2231         switch (key->cipher) {
2232         case WLAN_CIPHER_SUITE_TKIP:
2233                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2234                 /* fall-through */
2235         case WLAN_CIPHER_SUITE_CCMP:
2236                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2237                 break;
2238         case WLAN_CIPHER_SUITE_AES_CMAC:
2239                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2240                 break;
2241         case WLAN_CIPHER_SUITE_WEP40:
2242         case WLAN_CIPHER_SUITE_WEP104:
2243                 /*
2244                  * Support for TX only, at least for now, so accept
2245                  * the key and do nothing else. Then mac80211 will
2246                  * pass it for TX but we don't have to use it for RX.
2247                  */
2248                 return 0;
2249         default:
2250                 /* currently FW supports only one optional cipher scheme */
2251                 if (hw->n_cipher_schemes &&
2252                     hw->cipher_schemes->cipher == key->cipher)
2253                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2254                 else
2255                         return -EOPNOTSUPP;
2256         }
2257
2258         mutex_lock(&mvm->mutex);
2259
2260         switch (cmd) {
2261         case SET_KEY:
2262                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2263                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2264                         /*
2265                          * GTK on AP interface is a TX-only key, return 0;
2266                          * on IBSS they're per-station and because we're lazy
2267                          * we don't support them for RX, so do the same.
2268                          */
2269                         ret = 0;
2270                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2271                         break;
2272                 }
2273
2274                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2275                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2276                 if (ret) {
2277                         IWL_WARN(mvm, "set key failed\n");
2278                         /*
2279                          * can't add key for RX, but we don't need it
2280                          * in the device for TX so still return 0
2281                          */
2282                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2283                         ret = 0;
2284                 }
2285
2286                 break;
2287         case DISABLE_KEY:
2288                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2289                         ret = 0;
2290                         break;
2291                 }
2292
2293                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2294                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2295                 break;
2296         default:
2297                 ret = -EINVAL;
2298         }
2299
2300         mutex_unlock(&mvm->mutex);
2301         return ret;
2302 }
2303
2304 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2305                                         struct ieee80211_vif *vif,
2306                                         struct ieee80211_key_conf *keyconf,
2307                                         struct ieee80211_sta *sta,
2308                                         u32 iv32, u16 *phase1key)
2309 {
2310         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2311
2312         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2313                 return;
2314
2315         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2316 }
2317
2318
2319 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2320                                struct iwl_rx_packet *pkt, void *data)
2321 {
2322         struct iwl_mvm *mvm =
2323                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2324         struct iwl_hs20_roc_res *resp;
2325         int resp_len = iwl_rx_packet_payload_len(pkt);
2326         struct iwl_mvm_time_event_data *te_data = data;
2327
2328         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2329                 return true;
2330
2331         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2332                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2333                 return true;
2334         }
2335
2336         resp = (void *)pkt->data;
2337
2338         IWL_DEBUG_TE(mvm,
2339                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2340                      resp->status, resp->event_unique_id);
2341
2342         te_data->uid = le32_to_cpu(resp->event_unique_id);
2343         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2344                      te_data->uid);
2345
2346         spin_lock_bh(&mvm->time_event_lock);
2347         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2348         spin_unlock_bh(&mvm->time_event_lock);
2349
2350         return true;
2351 }
2352
2353 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2354 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2355                                     struct ieee80211_channel *channel,
2356                                     struct ieee80211_vif *vif,
2357                                     int duration)
2358 {
2359         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2360         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2361         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2362         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2363         struct iwl_notification_wait wait_time_event;
2364         struct iwl_hs20_roc_req aux_roc_req = {
2365                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2366                 .id_and_color =
2367                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2368                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2369                 /* Set the channel info data */
2370                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2371                         PHY_BAND_24 : PHY_BAND_5,
2372                 .channel_info.channel = channel->hw_value,
2373                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2374                 /* Set the time and duration */
2375                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2376                 .apply_time_max_delay =
2377                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2378                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2379          };
2380
2381         /* Set the node address */
2382         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2383
2384         te_data->vif = vif;
2385         te_data->duration = duration;
2386         te_data->id = HOT_SPOT_CMD;
2387
2388         lockdep_assert_held(&mvm->mutex);
2389
2390         spin_lock_bh(&mvm->time_event_lock);
2391         list_add_tail(&te_data->list, &mvm->time_event_list);
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         switch (vif->type) {
2448         case NL80211_IFTYPE_STATION:
2449                 /* Use aux roc framework (HS20) */
2450                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2451                                                vif, duration);
2452                 return ret;
2453         case NL80211_IFTYPE_P2P_DEVICE:
2454                 /* handle below */
2455                 break;
2456         default:
2457                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2458                 return -EINVAL;
2459         }
2460
2461         mutex_lock(&mvm->mutex);
2462
2463         for (i = 0; i < NUM_PHY_CTX; i++) {
2464                 phy_ctxt = &mvm->phy_ctxts[i];
2465                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2466                         continue;
2467
2468                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2469                         /*
2470                          * Unbind the P2P_DEVICE from the current PHY context,
2471                          * and if the PHY context is not used remove it.
2472                          */
2473                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2474                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2475                                 goto out_unlock;
2476
2477                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2478
2479                         /* Bind the P2P_DEVICE to the current PHY Context */
2480                         mvmvif->phy_ctxt = phy_ctxt;
2481
2482                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2483                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2484                                 goto out_unlock;
2485
2486                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2487                         goto schedule_time_event;
2488                 }
2489         }
2490
2491         /* Need to update the PHY context only if the ROC channel changed */
2492         if (channel == mvmvif->phy_ctxt->channel)
2493                 goto schedule_time_event;
2494
2495         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2496
2497         /*
2498          * Change the PHY context configuration as it is currently referenced
2499          * only by the P2P Device MAC
2500          */
2501         if (mvmvif->phy_ctxt->ref == 1) {
2502                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2503                                                &chandef, 1, 1);
2504                 if (ret)
2505                         goto out_unlock;
2506         } else {
2507                 /*
2508                  * The PHY context is shared with other MACs. Need to remove the
2509                  * P2P Device from the binding, allocate an new PHY context and
2510                  * create a new binding
2511                  */
2512                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2513                 if (!phy_ctxt) {
2514                         ret = -ENOSPC;
2515                         goto out_unlock;
2516                 }
2517
2518                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2519                                                1, 1);
2520                 if (ret) {
2521                         IWL_ERR(mvm, "Failed to change PHY context\n");
2522                         goto out_unlock;
2523                 }
2524
2525                 /* Unbind the P2P_DEVICE from the current PHY context */
2526                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2527                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2528                         goto out_unlock;
2529
2530                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2531
2532                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2533                 mvmvif->phy_ctxt = phy_ctxt;
2534
2535                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2536                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2537                         goto out_unlock;
2538
2539                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2540         }
2541
2542 schedule_time_event:
2543         /* Schedule the time events */
2544         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2545
2546 out_unlock:
2547         mutex_unlock(&mvm->mutex);
2548         IWL_DEBUG_MAC80211(mvm, "leave\n");
2549         return ret;
2550 }
2551
2552 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2553 {
2554         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2555
2556         IWL_DEBUG_MAC80211(mvm, "enter\n");
2557
2558         mutex_lock(&mvm->mutex);
2559         iwl_mvm_stop_p2p_roc(mvm);
2560         mutex_unlock(&mvm->mutex);
2561
2562         IWL_DEBUG_MAC80211(mvm, "leave\n");
2563         return 0;
2564 }
2565
2566 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2567                                  struct ieee80211_chanctx_conf *ctx)
2568 {
2569         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2570         struct iwl_mvm_phy_ctxt *phy_ctxt;
2571         int ret;
2572
2573         lockdep_assert_held(&mvm->mutex);
2574
2575         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2576
2577         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2578         if (!phy_ctxt) {
2579                 ret = -ENOSPC;
2580                 goto out;
2581         }
2582
2583         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2584                                        ctx->rx_chains_static,
2585                                        ctx->rx_chains_dynamic);
2586         if (ret) {
2587                 IWL_ERR(mvm, "Failed to add PHY context\n");
2588                 goto out;
2589         }
2590
2591         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2592         *phy_ctxt_id = phy_ctxt->id;
2593 out:
2594         return ret;
2595 }
2596
2597 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2598                                struct ieee80211_chanctx_conf *ctx)
2599 {
2600         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2601         int ret;
2602
2603         mutex_lock(&mvm->mutex);
2604         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2605         mutex_unlock(&mvm->mutex);
2606
2607         return ret;
2608 }
2609
2610 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2611                                      struct ieee80211_chanctx_conf *ctx)
2612 {
2613         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2614         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2615
2616         lockdep_assert_held(&mvm->mutex);
2617
2618         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2619 }
2620
2621 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2622                                    struct ieee80211_chanctx_conf *ctx)
2623 {
2624         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2625
2626         mutex_lock(&mvm->mutex);
2627         __iwl_mvm_remove_chanctx(mvm, ctx);
2628         mutex_unlock(&mvm->mutex);
2629 }
2630
2631 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2632                                    struct ieee80211_chanctx_conf *ctx,
2633                                    u32 changed)
2634 {
2635         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2636         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2637         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2638
2639         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2640                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2641                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2642                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2643                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2644                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2645                       phy_ctxt->ref, changed))
2646                 return;
2647
2648         mutex_lock(&mvm->mutex);
2649         iwl_mvm_bt_coex_vif_change(mvm);
2650         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2651                                  ctx->rx_chains_static,
2652                                  ctx->rx_chains_dynamic);
2653         mutex_unlock(&mvm->mutex);
2654 }
2655
2656 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2657                                         struct ieee80211_vif *vif,
2658                                         struct ieee80211_chanctx_conf *ctx,
2659                                         bool switching_chanctx)
2660 {
2661         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2662         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2663         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2664         int ret;
2665
2666         lockdep_assert_held(&mvm->mutex);
2667
2668         mvmvif->phy_ctxt = phy_ctxt;
2669
2670         switch (vif->type) {
2671         case NL80211_IFTYPE_AP:
2672                 /* Unless it's a CSA flow we have nothing to do here */
2673                 if (vif->csa_active) {
2674                         mvmvif->ap_ibss_active = true;
2675                         break;
2676                 }
2677         case NL80211_IFTYPE_ADHOC:
2678                 /*
2679                  * The AP binding flow is handled as part of the start_ap flow
2680                  * (in bss_info_changed), similarly for IBSS.
2681                  */
2682                 ret = 0;
2683                 goto out;
2684         case NL80211_IFTYPE_STATION:
2685                 break;
2686         case NL80211_IFTYPE_MONITOR:
2687                 /* always disable PS when a monitor interface is active */
2688                 mvmvif->ps_disabled = true;
2689                 break;
2690         default:
2691                 ret = -EINVAL;
2692                 goto out;
2693         }
2694
2695         ret = iwl_mvm_binding_add_vif(mvm, vif);
2696         if (ret)
2697                 goto out;
2698
2699         /*
2700          * Power state must be updated before quotas,
2701          * otherwise fw will complain.
2702          */
2703         iwl_mvm_power_update_mac(mvm);
2704
2705         /* Setting the quota at this stage is only required for monitor
2706          * interfaces. For the other types, the bss_info changed flow
2707          * will handle quota settings.
2708          */
2709         if (vif->type == NL80211_IFTYPE_MONITOR) {
2710                 mvmvif->monitor_active = true;
2711                 ret = iwl_mvm_update_quotas(mvm, NULL);
2712                 if (ret)
2713                         goto out_remove_binding;
2714         }
2715
2716         /* Handle binding during CSA */
2717         if ((vif->type == NL80211_IFTYPE_AP) ||
2718             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2719                 iwl_mvm_update_quotas(mvm, NULL);
2720                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2721         }
2722
2723         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2724                 struct iwl_mvm_sta *mvmsta;
2725
2726                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2727                                                           mvmvif->ap_sta_id);
2728
2729                 if (WARN_ON(!mvmsta))
2730                         goto out;
2731
2732                 /* TODO: only re-enable after the first beacon */
2733                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2734         }
2735
2736         goto out;
2737
2738 out_remove_binding:
2739         iwl_mvm_binding_remove_vif(mvm, vif);
2740         iwl_mvm_power_update_mac(mvm);
2741 out:
2742         if (ret)
2743                 mvmvif->phy_ctxt = NULL;
2744         return ret;
2745 }
2746 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2747                                       struct ieee80211_vif *vif,
2748                                       struct ieee80211_chanctx_conf *ctx)
2749 {
2750         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2751         int ret;
2752
2753         mutex_lock(&mvm->mutex);
2754         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2755         mutex_unlock(&mvm->mutex);
2756
2757         return ret;
2758 }
2759
2760 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2761                                            struct ieee80211_vif *vif,
2762                                            struct ieee80211_chanctx_conf *ctx,
2763                                            bool switching_chanctx)
2764 {
2765         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2766         struct ieee80211_vif *disabled_vif = NULL;
2767         struct iwl_mvm_sta *mvmsta;
2768
2769         lockdep_assert_held(&mvm->mutex);
2770
2771         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2772
2773         switch (vif->type) {
2774         case NL80211_IFTYPE_ADHOC:
2775                 goto out;
2776         case NL80211_IFTYPE_MONITOR:
2777                 mvmvif->monitor_active = false;
2778                 mvmvif->ps_disabled = false;
2779                 break;
2780         case NL80211_IFTYPE_AP:
2781                 /* This part is triggered only during CSA */
2782                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2783                         goto out;
2784
2785                 /* Set CS bit on all the stations */
2786                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2787
2788                 /* Save blocked iface, the timeout is set on the next beacon */
2789                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2790
2791                 mvmvif->ap_ibss_active = false;
2792                 break;
2793         case NL80211_IFTYPE_STATION:
2794                 if (!switching_chanctx)
2795                         break;
2796
2797                 disabled_vif = vif;
2798
2799                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2800                                                           mvmvif->ap_sta_id);
2801
2802                 if (!WARN_ON(!mvmsta))
2803                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2804
2805                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2806                 break;
2807         default:
2808                 break;
2809         }
2810
2811         iwl_mvm_update_quotas(mvm, disabled_vif);
2812         iwl_mvm_binding_remove_vif(mvm, vif);
2813
2814 out:
2815         mvmvif->phy_ctxt = NULL;
2816         iwl_mvm_power_update_mac(mvm);
2817 }
2818
2819 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2820                                          struct ieee80211_vif *vif,
2821                                          struct ieee80211_chanctx_conf *ctx)
2822 {
2823         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2824
2825         mutex_lock(&mvm->mutex);
2826         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2827         mutex_unlock(&mvm->mutex);
2828 }
2829
2830 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2831                                       struct ieee80211_vif_chanctx_switch *vifs,
2832                                       int n_vifs,
2833                                       enum ieee80211_chanctx_switch_mode mode)
2834 {
2835         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2836         int ret;
2837
2838         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2839         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2840                 return -EOPNOTSUPP;
2841
2842         mutex_lock(&mvm->mutex);
2843         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2844         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2845
2846         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2847         if (ret) {
2848                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2849                 goto out_reassign;
2850         }
2851
2852         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2853                                            true);
2854         if (ret) {
2855                 IWL_ERR(mvm,
2856                         "failed to assign new_ctx during channel switch\n");
2857                 goto out_remove;
2858         }
2859
2860         /* we don't support TDLS during DCM - can be caused by channel switch */
2861         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2862                 iwl_mvm_teardown_tdls_peers(mvm);
2863
2864         goto out;
2865
2866 out_remove:
2867         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2868
2869 out_reassign:
2870         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2871         if (ret) {
2872                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2873                 goto out_restart;
2874         }
2875
2876         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2877                                            true);
2878         if (ret) {
2879                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2880                 goto out_restart;
2881         }
2882
2883         goto out;
2884
2885 out_restart:
2886         /* things keep failing, better restart the hw */
2887         iwl_mvm_nic_restart(mvm, false);
2888
2889 out:
2890         mutex_unlock(&mvm->mutex);
2891         return ret;
2892 }
2893
2894 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2895                            struct ieee80211_sta *sta,
2896                            bool set)
2897 {
2898         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2899         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2900
2901         if (!mvm_sta || !mvm_sta->vif) {
2902                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2903                 return -EINVAL;
2904         }
2905
2906         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2907 }
2908
2909 #ifdef CONFIG_NL80211_TESTMODE
2910 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2911         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2912         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2913         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2914 };
2915
2916 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2917                                       struct ieee80211_vif *vif,
2918                                       void *data, int len)
2919 {
2920         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2921         int err;
2922         u32 noa_duration;
2923
2924         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2925         if (err)
2926                 return err;
2927
2928         if (!tb[IWL_MVM_TM_ATTR_CMD])
2929                 return -EINVAL;
2930
2931         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2932         case IWL_MVM_TM_CMD_SET_NOA:
2933                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2934                     !vif->bss_conf.enable_beacon ||
2935                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2936                         return -EINVAL;
2937
2938                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2939                 if (noa_duration >= vif->bss_conf.beacon_int)
2940                         return -EINVAL;
2941
2942                 mvm->noa_duration = noa_duration;
2943                 mvm->noa_vif = vif;
2944
2945                 return iwl_mvm_update_quotas(mvm, NULL);
2946         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2947                 /* must be associated client vif - ignore authorized */
2948                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2949                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2950                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2951                         return -EINVAL;
2952
2953                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2954                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2955                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2956         }
2957
2958         return -EOPNOTSUPP;
2959 }
2960
2961 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2962                                     struct ieee80211_vif *vif,
2963                                     void *data, int len)
2964 {
2965         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2966         int err;
2967
2968         mutex_lock(&mvm->mutex);
2969         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2970         mutex_unlock(&mvm->mutex);
2971
2972         return err;
2973 }
2974 #endif
2975
2976 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2977                                           struct ieee80211_vif *vif,
2978                                           struct cfg80211_chan_def *chandef)
2979 {
2980         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2981         struct ieee80211_vif *csa_vif;
2982
2983         mutex_lock(&mvm->mutex);
2984
2985         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2986                                             lockdep_is_held(&mvm->mutex));
2987         if (WARN(csa_vif && csa_vif->csa_active,
2988                  "Another CSA is already in progress"))
2989                 goto out_unlock;
2990
2991         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2992                            chandef->center_freq1);
2993         rcu_assign_pointer(mvm->csa_vif, vif);
2994
2995 out_unlock:
2996         mutex_unlock(&mvm->mutex);
2997 }
2998
2999 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3000                               struct ieee80211_vif *vif, u32 queues, bool drop)
3001 {
3002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3003         struct iwl_mvm_vif *mvmvif;
3004         struct iwl_mvm_sta *mvmsta;
3005
3006         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3007                 return;
3008
3009         mutex_lock(&mvm->mutex);
3010         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3011         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3012
3013         if (WARN_ON_ONCE(!mvmsta))
3014                 goto done;
3015
3016         if (drop) {
3017                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3018                         IWL_ERR(mvm, "flush request fail\n");
3019         } else {
3020                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3021                                               mvmsta->tfd_queue_msk);
3022         }
3023 done:
3024         mutex_unlock(&mvm->mutex);
3025 }
3026
3027 const struct ieee80211_ops iwl_mvm_hw_ops = {
3028         .tx = iwl_mvm_mac_tx,
3029         .ampdu_action = iwl_mvm_mac_ampdu_action,
3030         .start = iwl_mvm_mac_start,
3031         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3032         .stop = iwl_mvm_mac_stop,
3033         .add_interface = iwl_mvm_mac_add_interface,
3034         .remove_interface = iwl_mvm_mac_remove_interface,
3035         .config = iwl_mvm_mac_config,
3036         .prepare_multicast = iwl_mvm_prepare_multicast,
3037         .configure_filter = iwl_mvm_configure_filter,
3038         .bss_info_changed = iwl_mvm_bss_info_changed,
3039         .hw_scan = iwl_mvm_mac_hw_scan,
3040         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3041         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3042         .sta_state = iwl_mvm_mac_sta_state,
3043         .sta_notify = iwl_mvm_mac_sta_notify,
3044         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3045         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3046         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3047         .sta_rc_update = iwl_mvm_sta_rc_update,
3048         .conf_tx = iwl_mvm_mac_conf_tx,
3049         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3050         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3051         .flush = iwl_mvm_mac_flush,
3052         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3053         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3054         .set_key = iwl_mvm_mac_set_key,
3055         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3056         .remain_on_channel = iwl_mvm_roc,
3057         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3058         .add_chanctx = iwl_mvm_add_chanctx,
3059         .remove_chanctx = iwl_mvm_remove_chanctx,
3060         .change_chanctx = iwl_mvm_change_chanctx,
3061         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3062         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3063         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3064
3065         .start_ap = iwl_mvm_start_ap_ibss,
3066         .stop_ap = iwl_mvm_stop_ap_ibss,
3067         .join_ibss = iwl_mvm_start_ap_ibss,
3068         .leave_ibss = iwl_mvm_stop_ap_ibss,
3069
3070         .set_tim = iwl_mvm_set_tim,
3071
3072         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3073
3074         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3075
3076 #ifdef CONFIG_PM_SLEEP
3077         /* look at d3.c */
3078         .suspend = iwl_mvm_suspend,
3079         .resume = iwl_mvm_resume,
3080         .set_wakeup = iwl_mvm_set_wakeup,
3081         .set_rekey_data = iwl_mvm_set_rekey_data,
3082 #if IS_ENABLED(CONFIG_IPV6)
3083         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3084 #endif
3085         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3086 #endif
3087 };