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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/ieee80211_radiotap.h>
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-io.h"
  47 #include "iwl-trans.h"
  48 #include "iwl-op-mode.h"
  49 #include "iwl-modparams.h"
  50
  51 #include "dev.h"
  52 #include "calib.h"
  53 #include "agn.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_PERIOD |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 151                     IEEE80211_HW_QUEUE_CONTROL |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_WANT_MONITOR_VIF |
 155                     IEEE80211_HW_SCAN_WHILE_IDLE;
 156
 157         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 158         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 159
 160         /*
 161          * Including the following line will crash some AP's.  This
 162          * workaround removes the stimulus which causes the crash until
 163          * the AP software can be fixed.
 164         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 165          */
 166
 167         if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE)
 168                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 169                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 170
 171 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
 172         /* enable 11w if the uCode advertise */
 173         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 174 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
 175                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 176
 177         hw->sta_data_size = sizeof(struct iwl_station_priv);
 178         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 179
 180         for_each_context(priv, ctx) {
 181                 hw->wiphy->interface_modes |= ctx->interface_modes;
 182                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 183         }
 184
 185         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 186
 187         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 188                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 189                 hw->wiphy->n_iface_combinations =
 190                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 191         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 192                 hw->wiphy->iface_combinations =
 193                         iwlagn_iface_combinations_dualmode;
 194                 hw->wiphy->n_iface_combinations =
 195                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 196         }
 197
 198         hw->wiphy->max_remain_on_channel_duration = 1000;
 199
 200         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 201                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 202                             WIPHY_FLAG_IBSS_RSN;
 203
 204 #ifdef CONFIG_PM_SLEEP
 205         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 206             priv->trans->ops->wowlan_suspend &&
 207             device_can_wakeup(priv->trans->dev)) {
 208                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 209                                           WIPHY_WOWLAN_DISCONNECT |
 210                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 211                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 212                 if (!iwlwifi_mod_params.sw_crypto)
 213                         hw->wiphy->wowlan.flags |=
 214                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 215                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 216
 217                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 218                 hw->wiphy->wowlan.pattern_min_len =
 219                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 220                 hw->wiphy->wowlan.pattern_max_len =
 221                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 222         }
 223 #endif
 224
 225         if (iwlwifi_mod_params.power_save)
 226                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 227         else
 228                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 229
 230         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 231         /* we create the 802.11 header and a max-length SSID element */
 232         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 233
 234         /*
 235          * We don't use all queues: 4 and 9 are unused and any
 236          * aggregation queue gets mapped down to the AC queue.
 237          */
 238         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 239
 240         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 241
 242         if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 243                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 244                         &priv->eeprom_data->bands[IEEE80211_BAND_2GHZ];
 245         if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 246                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 247                         &priv->eeprom_data->bands[IEEE80211_BAND_5GHZ];
 248
 249         hw->wiphy->hw_version = priv->trans->hw_id;
 250
 251         iwl_leds_init(priv);
 252
 253         ret = ieee80211_register_hw(priv->hw);
 254         if (ret) {
 255                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 256                 iwl_leds_exit(priv);
 257                 return ret;
 258         }
 259         priv->mac80211_registered = 1;
 260
 261         return 0;
 262 }
 263
 264 void iwlagn_mac_unregister(struct iwl_priv *priv)
 265 {
 266         if (!priv->mac80211_registered)
 267                 return;
 268         iwl_leds_exit(priv);
 269         ieee80211_unregister_hw(priv->hw);
 270         priv->mac80211_registered = 0;
 271 }
 272
 273 static int __iwl_up(struct iwl_priv *priv)
 274 {
 275         struct iwl_rxon_context *ctx;
 276         int ret;
 277
 278         lockdep_assert_held(&priv->mutex);
 279
 280         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 281                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 282                 return -EIO;
 283         }
 284
 285         for_each_context(priv, ctx) {
 286                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 287                 if (ret) {
 288                         iwl_dealloc_bcast_stations(priv);
 289                         return ret;
 290                 }
 291         }
 292
 293         ret = iwl_run_init_ucode(priv);
 294         if (ret) {
 295                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 296                 goto error;
 297         }
 298
 299         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 300         if (ret) {
 301                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 302                 goto error;
 303         }
 304
 305         ret = iwl_alive_start(priv);
 306         if (ret)
 307                 goto error;
 308         return 0;
 309
 310  error:
 311         set_bit(STATUS_EXIT_PENDING, &priv->status);
 312         iwl_down(priv);
 313         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 314
 315         IWL_ERR(priv, "Unable to initialize device.\n");
 316         return ret;
 317 }
 318
 319 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 320 {
 321         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 322         int ret;
 323
 324         IWL_DEBUG_MAC80211(priv, "enter\n");
 325
 326         /* we should be verifying the device is ready to be opened */
 327         mutex_lock(&priv->mutex);
 328         ret = __iwl_up(priv);
 329         mutex_unlock(&priv->mutex);
 330         if (ret)
 331                 return ret;
 332
 333         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 334
 335         /* Now we should be done, and the READY bit should be set. */
 336         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 337                 ret = -EIO;
 338
 339         iwlagn_led_enable(priv);
 340
 341         priv->is_open = 1;
 342         IWL_DEBUG_MAC80211(priv, "leave\n");
 343         return 0;
 344 }
 345
 346 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 347 {
 348         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 349
 350         IWL_DEBUG_MAC80211(priv, "enter\n");
 351
 352         if (!priv->is_open)
 353                 return;
 354
 355         priv->is_open = 0;
 356
 357         mutex_lock(&priv->mutex);
 358         iwl_down(priv);
 359         mutex_unlock(&priv->mutex);
 360
 361         iwl_cancel_deferred_work(priv);
 362
 363         flush_workqueue(priv->workqueue);
 364
 365         /* User space software may expect getting rfkill changes
 366          * even if interface is down, trans->down will leave the RF
 367          * kill interrupt enabled
 368          */
 369         iwl_trans_stop_hw(priv->trans, false);
 370
 371         IWL_DEBUG_MAC80211(priv, "leave\n");
 372 }
 373
 374 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 375                                       struct ieee80211_vif *vif,
 376                                       struct cfg80211_gtk_rekey_data *data)
 377 {
 378         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 379
 380         if (iwlwifi_mod_params.sw_crypto)
 381                 return;
 382
 383         IWL_DEBUG_MAC80211(priv, "enter\n");
 384         mutex_lock(&priv->mutex);
 385
 386         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 387                 goto out;
 388
 389         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 390         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 391         priv->replay_ctr =
 392                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 393         priv->have_rekey_data = true;
 394
 395  out:
 396         mutex_unlock(&priv->mutex);
 397         IWL_DEBUG_MAC80211(priv, "leave\n");
 398 }
 399
 400 #ifdef CONFIG_PM_SLEEP
 401
 402 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 403                               struct cfg80211_wowlan *wowlan)
 404 {
 405         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 406         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 407         int ret;
 408
 409         if (WARN_ON(!wowlan))
 410                 return -EINVAL;
 411
 412         IWL_DEBUG_MAC80211(priv, "enter\n");
 413         mutex_lock(&priv->mutex);
 414
 415         /* Don't attempt WoWLAN when not associated, tear down instead. */
 416         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 417             !iwl_is_associated_ctx(ctx)) {
 418                 ret = 1;
 419                 goto out;
 420         }
 421
 422         ret = iwlagn_suspend(priv, wowlan);
 423         if (ret)
 424                 goto error;
 425
 426         iwl_trans_wowlan_suspend(priv->trans);
 427
 428         goto out;
 429
 430  error:
 431         priv->wowlan = false;
 432         iwlagn_prepare_restart(priv);
 433         ieee80211_restart_hw(priv->hw);
 434  out:
 435         mutex_unlock(&priv->mutex);
 436         IWL_DEBUG_MAC80211(priv, "leave\n");
 437
 438         return ret;
 439 }
 440
 441 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 442 {
 443         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 444         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 445         struct ieee80211_vif *vif;
 446         unsigned long flags;
 447         u32 base, status = 0xffffffff;
 448         int ret = -EIO;
 449
 450         IWL_DEBUG_MAC80211(priv, "enter\n");
 451         mutex_lock(&priv->mutex);
 452
 453         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 454                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 455
 456         base = priv->device_pointers.error_event_table;
 457         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 458                 spin_lock_irqsave(&priv->trans->reg_lock, flags);
 459                 ret = iwl_grab_nic_access_silent(priv->trans);
 460                 if (likely(ret == 0)) {
 461                         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
 462                         status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 463                         iwl_release_nic_access(priv->trans);
 464                 }
 465                 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
 466
 467 #ifdef CONFIG_IWLWIFI_DEBUGFS
 468                 if (ret == 0) {
 469                         const struct fw_img *img;
 470
 471                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 472                         if (!priv->wowlan_sram) {
 473                                 priv->wowlan_sram =
 474                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 475                                                 GFP_KERNEL);
 476                         }
 477
 478                         if (priv->wowlan_sram)
 479                                 _iwl_read_targ_mem_dwords(
 480                                       priv->trans, 0x800000,
 481                                       priv->wowlan_sram,
 482                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 483                 }
 484 #endif
 485         }
 486
 487         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 488         vif = ctx->vif;
 489
 490         priv->wowlan = false;
 491
 492         iwlagn_prepare_restart(priv);
 493
 494         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 495         iwl_connection_init_rx_config(priv, ctx);
 496         iwlagn_set_rxon_chain(priv, ctx);
 497
 498         mutex_unlock(&priv->mutex);
 499         IWL_DEBUG_MAC80211(priv, "leave\n");
 500
 501         ieee80211_resume_disconnect(vif);
 502
 503         return 1;
 504 }
 505
 506 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 507 {
 508         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 509
 510         device_set_wakeup_enable(priv->trans->dev, enabled);
 511 }
 512 #endif
 513
 514 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 515 {
 516         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 517
 518         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 519                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 520
 521         if (iwlagn_tx_skb(priv, skb))
 522                 dev_kfree_skb_any(skb);
 523 }
 524
 525 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 526                                        struct ieee80211_vif *vif,
 527                                        struct ieee80211_key_conf *keyconf,
 528                                        struct ieee80211_sta *sta,
 529                                        u32 iv32, u16 *phase1key)
 530 {
 531         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 532
 533         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 534 }
 535
 536 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 537                               struct ieee80211_vif *vif,
 538                               struct ieee80211_sta *sta,
 539                               struct ieee80211_key_conf *key)
 540 {
 541         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 542         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 543         struct iwl_rxon_context *ctx = vif_priv->ctx;
 544         int ret;
 545         bool is_default_wep_key = false;
 546
 547         IWL_DEBUG_MAC80211(priv, "enter\n");
 548
 549         if (iwlwifi_mod_params.sw_crypto) {
 550                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 551                 return -EOPNOTSUPP;
 552         }
 553
 554         switch (key->cipher) {
 555         case WLAN_CIPHER_SUITE_TKIP:
 556                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 557                 /* fall through */
 558         case WLAN_CIPHER_SUITE_CCMP:
 559                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 560                 break;
 561         default:
 562                 break;
 563         }
 564
 565         /*
 566          * We could program these keys into the hardware as well, but we
 567          * don't expect much multicast traffic in IBSS and having keys
 568          * for more stations is probably more useful.
 569          *
 570          * Mark key TX-only and return 0.
 571          */
 572         if (vif->type == NL80211_IFTYPE_ADHOC &&
 573             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 574                 key->hw_key_idx = WEP_INVALID_OFFSET;
 575                 return 0;
 576         }
 577
 578         /* If they key was TX-only, accept deletion */
 579         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 580                 return 0;
 581
 582         mutex_lock(&priv->mutex);
 583         iwl_scan_cancel_timeout(priv, 100);
 584
 585         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 586
 587         /*
 588          * If we are getting WEP group key and we didn't receive any key mapping
 589          * so far, we are in legacy wep mode (group key only), otherwise we are
 590          * in 1X mode.
 591          * In legacy wep mode, we use another host command to the uCode.
 592          */
 593         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 594              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 595                 if (cmd == SET_KEY)
 596                         is_default_wep_key = !ctx->key_mapping_keys;
 597                 else
 598                         is_default_wep_key =
 599                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 600         }
 601
 602
 603         switch (cmd) {
 604         case SET_KEY:
 605                 if (is_default_wep_key) {
 606                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 607                         break;
 608                 }
 609                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 610                 if (ret) {
 611                         /*
 612                          * can't add key for RX, but we don't need it
 613                          * in the device for TX so still return 0
 614                          */
 615                         ret = 0;
 616                         key->hw_key_idx = WEP_INVALID_OFFSET;
 617                 }
 618
 619                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 620                 break;
 621         case DISABLE_KEY:
 622                 if (is_default_wep_key)
 623                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 624                 else
 625                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 626
 627                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 628                 break;
 629         default:
 630                 ret = -EINVAL;
 631         }
 632
 633         mutex_unlock(&priv->mutex);
 634         IWL_DEBUG_MAC80211(priv, "leave\n");
 635
 636         return ret;
 637 }
 638
 639 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 640                                    struct ieee80211_vif *vif,
 641                                    enum ieee80211_ampdu_mlme_action action,
 642                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 643                                    u8 buf_size)
 644 {
 645         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 646         int ret = -EINVAL;
 647         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 648
 649         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 650                      sta->addr, tid);
 651
 652         if (!(priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE))
 653                 return -EACCES;
 654
 655         IWL_DEBUG_MAC80211(priv, "enter\n");
 656         mutex_lock(&priv->mutex);
 657
 658         switch (action) {
 659         case IEEE80211_AMPDU_RX_START:
 660                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 661                         break;
 662                 IWL_DEBUG_HT(priv, "start Rx\n");
 663                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 664                 break;
 665         case IEEE80211_AMPDU_RX_STOP:
 666                 IWL_DEBUG_HT(priv, "stop Rx\n");
 667                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 668                 break;
 669         case IEEE80211_AMPDU_TX_START:
 670                 if (!priv->trans->ops->txq_enable)
 671                         break;
 672                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 673                         break;
 674                 IWL_DEBUG_HT(priv, "start Tx\n");
 675                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 676                 break;
 677         case IEEE80211_AMPDU_TX_STOP:
 678                 IWL_DEBUG_HT(priv, "stop Tx\n");
 679                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 680                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 681                         priv->agg_tids_count--;
 682                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 683                                      priv->agg_tids_count);
 684                 }
 685                 if (!priv->agg_tids_count &&
 686                     priv->hw_params.use_rts_for_aggregation) {
 687                         /*
 688                          * switch off RTS/CTS if it was previously enabled
 689                          */
 690                         sta_priv->lq_sta.lq.general_params.flags &=
 691                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 692                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 693                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 694                 }
 695                 break;
 696         case IEEE80211_AMPDU_TX_OPERATIONAL:
 697                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 698                 break;
 699         }
 700         mutex_unlock(&priv->mutex);
 701         IWL_DEBUG_MAC80211(priv, "leave\n");
 702         return ret;
 703 }
 704
 705 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 706                               struct ieee80211_vif *vif,
 707                               struct ieee80211_sta *sta)
 708 {
 709         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 710         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 711         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 712         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 713         int ret;
 714         u8 sta_id;
 715
 716         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 717                         sta->addr);
 718         sta_priv->sta_id = IWL_INVALID_STATION;
 719
 720         atomic_set(&sta_priv->pending_frames, 0);
 721         if (vif->type == NL80211_IFTYPE_AP)
 722                 sta_priv->client = true;
 723
 724         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 725                                      is_ap, sta, &sta_id);
 726         if (ret) {
 727                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 728                         sta->addr, ret);
 729                 /* Should we return success if return code is EEXIST ? */
 730                 return ret;
 731         }
 732
 733         sta_priv->sta_id = sta_id;
 734
 735         return 0;
 736 }
 737
 738 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 739                                  struct ieee80211_vif *vif,
 740                                  struct ieee80211_sta *sta)
 741 {
 742         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 743         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 744         int ret;
 745
 746         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 747
 748         if (vif->type == NL80211_IFTYPE_STATION) {
 749                 /*
 750                  * Station will be removed from device when the RXON
 751                  * is set to unassociated -- just deactivate it here
 752                  * to avoid re-programming it.
 753                  */
 754                 ret = 0;
 755                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 756         } else {
 757                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 758                 if (ret)
 759                         IWL_DEBUG_QUIET_RFKILL(priv,
 760                                 "Error removing station %pM\n", sta->addr);
 761         }
 762         return ret;
 763 }
 764
 765 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 766                                 struct ieee80211_vif *vif,
 767                                 struct ieee80211_sta *sta,
 768                                 enum ieee80211_sta_state old_state,
 769                                 enum ieee80211_sta_state new_state)
 770 {
 771         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 772         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 773         enum {
 774                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 775         } op = NONE;
 776         int ret;
 777
 778         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 779                            sta->addr, old_state, new_state);
 780
 781         mutex_lock(&priv->mutex);
 782         if (vif->type == NL80211_IFTYPE_STATION) {
 783                 if (old_state == IEEE80211_STA_NOTEXIST &&
 784                     new_state == IEEE80211_STA_NONE)
 785                         op = ADD;
 786                 else if (old_state == IEEE80211_STA_NONE &&
 787                          new_state == IEEE80211_STA_NOTEXIST)
 788                         op = REMOVE;
 789                 else if (old_state == IEEE80211_STA_AUTH &&
 790                          new_state == IEEE80211_STA_ASSOC)
 791                         op = HT_RATE_INIT;
 792         } else {
 793                 if (old_state == IEEE80211_STA_AUTH &&
 794                     new_state == IEEE80211_STA_ASSOC)
 795                         op = ADD_RATE_INIT;
 796                 else if (old_state == IEEE80211_STA_ASSOC &&
 797                          new_state == IEEE80211_STA_AUTH)
 798                         op = REMOVE;
 799         }
 800
 801         switch (op) {
 802         case ADD:
 803                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 804                 if (ret)
 805                         break;
 806                 /*
 807                  * Clear the in-progress flag, the AP station entry was added
 808                  * but we'll initialize LQ only when we've associated (which
 809                  * would also clear the in-progress flag). This is necessary
 810                  * in case we never initialize LQ because association fails.
 811                  */
 812                 spin_lock_bh(&priv->sta_lock);
 813                 priv->stations[iwl_sta_id(sta)].used &=
 814                         ~IWL_STA_UCODE_INPROGRESS;
 815                 spin_unlock_bh(&priv->sta_lock);
 816                 break;
 817         case REMOVE:
 818                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 819                 break;
 820         case ADD_RATE_INIT:
 821                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 822                 if (ret)
 823                         break;
 824                 /* Initialize rate scaling */
 825                 IWL_DEBUG_INFO(priv,
 826                                "Initializing rate scaling for station %pM\n",
 827                                sta->addr);
 828                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 829                 ret = 0;
 830                 break;
 831         case HT_RATE_INIT:
 832                 /* Initialize rate scaling */
 833                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 834                 if (ret)
 835                         break;
 836                 IWL_DEBUG_INFO(priv,
 837                                "Initializing rate scaling for station %pM\n",
 838                                sta->addr);
 839                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 840                 ret = 0;
 841                 break;
 842         default:
 843                 ret = 0;
 844                 break;
 845         }
 846
 847         /*
 848          * mac80211 might WARN if we fail, but due the way we
 849          * (badly) handle hard rfkill, we might fail here
 850          */
 851         if (iwl_is_rfkill(priv))
 852                 ret = 0;
 853
 854         mutex_unlock(&priv->mutex);
 855         IWL_DEBUG_MAC80211(priv, "leave\n");
 856
 857         return ret;
 858 }
 859
 860 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 861                                       struct ieee80211_channel_switch *ch_switch)
 862 {
 863         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 864         struct ieee80211_conf *conf = &hw->conf;
 865         struct ieee80211_channel *channel = ch_switch->channel;
 866         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 867         /*
 868          * MULTI-FIXME
 869          * When we add support for multiple interfaces, we need to
 870          * revisit this. The channel switch command in the device
 871          * only affects the BSS context, but what does that really
 872          * mean? And what if we get a CSA on the second interface?
 873          * This needs a lot of work.
 874          */
 875         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 876         u16 ch;
 877
 878         IWL_DEBUG_MAC80211(priv, "enter\n");
 879
 880         mutex_lock(&priv->mutex);
 881
 882         if (iwl_is_rfkill(priv))
 883                 goto out;
 884
 885         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 886             test_bit(STATUS_SCANNING, &priv->status) ||
 887             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 888                 goto out;
 889
 890         if (!iwl_is_associated_ctx(ctx))
 891                 goto out;
 892
 893         if (!priv->lib->set_channel_switch)
 894                 goto out;
 895
 896         ch = channel->hw_value;
 897         if (le16_to_cpu(ctx->active.channel) == ch)
 898                 goto out;
 899
 900         priv->current_ht_config.smps = conf->smps_mode;
 901
 902         /* Configure HT40 channels */
 903         ctx->ht.enabled = conf_is_ht(conf);
 904         if (ctx->ht.enabled)
 905                 iwlagn_config_ht40(conf, ctx);
 906         else
 907                 ctx->ht.is_40mhz = false;
 908
 909         if ((le16_to_cpu(ctx->staging.channel) != ch))
 910                 ctx->staging.flags = 0;
 911
 912         iwl_set_rxon_channel(priv, channel, ctx);
 913         iwl_set_rxon_ht(priv, ht_conf);
 914         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 915
 916         /*
 917          * at this point, staging_rxon has the
 918          * configuration for channel switch
 919          */
 920         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 921         priv->switch_channel = cpu_to_le16(ch);
 922         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 923                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 924                 priv->switch_channel = 0;
 925                 ieee80211_chswitch_done(ctx->vif, false);
 926         }
 927
 928 out:
 929         mutex_unlock(&priv->mutex);
 930         IWL_DEBUG_MAC80211(priv, "leave\n");
 931 }
 932
 933 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 934 {
 935         /*
 936          * MULTI-FIXME
 937          * See iwlagn_mac_channel_switch.
 938          */
 939         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 940
 941         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 942                 return;
 943
 944         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 945                 ieee80211_chswitch_done(ctx->vif, is_success);
 946 }
 947
 948 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 949                                     unsigned int changed_flags,
 950                                     unsigned int *total_flags,
 951                                     u64 multicast)
 952 {
 953         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 954         __le32 filter_or = 0, filter_nand = 0;
 955         struct iwl_rxon_context *ctx;
 956
 957 #define CHK(test, flag) do { \
 958         if (*total_flags & (test))              \
 959                 filter_or |= (flag);            \
 960         else                                    \
 961                 filter_nand |= (flag);          \
 962         } while (0)
 963
 964         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 965                         changed_flags, *total_flags);
 966
 967         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 968         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 969         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 970         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 971
 972 #undef CHK
 973
 974         mutex_lock(&priv->mutex);
 975
 976         for_each_context(priv, ctx) {
 977                 ctx->staging.filter_flags &= ~filter_nand;
 978                 ctx->staging.filter_flags |= filter_or;
 979
 980                 /*
 981                  * Not committing directly because hardware can perform a scan,
 982                  * but we'll eventually commit the filter flags change anyway.
 983                  */
 984         }
 985
 986         mutex_unlock(&priv->mutex);
 987
 988         /*
 989          * Receiving all multicast frames is always enabled by the
 990          * default flags setup in iwl_connection_init_rx_config()
 991          * since we currently do not support programming multicast
 992          * filters into the device.
 993          */
 994         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 995                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 996 }
 997
 998 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 999 {
1000         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1001
1002         mutex_lock(&priv->mutex);
1003         IWL_DEBUG_MAC80211(priv, "enter\n");
1004
1005         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1006                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1007                 goto done;
1008         }
1009         if (iwl_is_rfkill(priv)) {
1010                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1011                 goto done;
1012         }
1013
1014         /*
1015          * mac80211 will not push any more frames for transmit
1016          * until the flush is completed
1017          */
1018         if (drop) {
1019                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1020                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1021                         IWL_ERR(priv, "flush request fail\n");
1022                         goto done;
1023                 }
1024         }
1025         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1026         iwl_trans_wait_tx_queue_empty(priv->trans);
1027 done:
1028         mutex_unlock(&priv->mutex);
1029         IWL_DEBUG_MAC80211(priv, "leave\n");
1030 }
1031
1032 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1033                                      struct ieee80211_channel *channel,
1034                                      enum nl80211_channel_type channel_type,
1035                                      int duration)
1036 {
1037         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1038         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1039         int err = 0;
1040
1041         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1042                 return -EOPNOTSUPP;
1043
1044         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1045                 return -EOPNOTSUPP;
1046
1047         IWL_DEBUG_MAC80211(priv, "enter\n");
1048         mutex_lock(&priv->mutex);
1049
1050         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1051                 err = -EBUSY;
1052                 goto out;
1053         }
1054
1055         priv->hw_roc_channel = channel;
1056         priv->hw_roc_chantype = channel_type;
1057         /* convert from ms to TU */
1058         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1059         priv->hw_roc_start_notified = false;
1060         cancel_delayed_work(&priv->hw_roc_disable_work);
1061
1062         if (!ctx->is_active) {
1063                 static const struct iwl_qos_info default_qos_data = {
1064                         .def_qos_parm = {
1065                                 .ac[0] = {
1066                                         .cw_min = cpu_to_le16(3),
1067                                         .cw_max = cpu_to_le16(7),
1068                                         .aifsn = 2,
1069                                         .edca_txop = cpu_to_le16(1504),
1070                                 },
1071                                 .ac[1] = {
1072                                         .cw_min = cpu_to_le16(7),
1073                                         .cw_max = cpu_to_le16(15),
1074                                         .aifsn = 2,
1075                                         .edca_txop = cpu_to_le16(3008),
1076                                 },
1077                                 .ac[2] = {
1078                                         .cw_min = cpu_to_le16(15),
1079                                         .cw_max = cpu_to_le16(1023),
1080                                         .aifsn = 3,
1081                                 },
1082                                 .ac[3] = {
1083                                         .cw_min = cpu_to_le16(15),
1084                                         .cw_max = cpu_to_le16(1023),
1085                                         .aifsn = 7,
1086                                 },
1087                         },
1088                 };
1089
1090                 ctx->is_active = true;
1091                 ctx->qos_data = default_qos_data;
1092                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1093                 memcpy(ctx->staging.node_addr,
1094                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1095                        ETH_ALEN);
1096                 memcpy(ctx->staging.bssid_addr,
1097                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1098                        ETH_ALEN);
1099                 err = iwlagn_commit_rxon(priv, ctx);
1100                 if (err)
1101                         goto out;
1102                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1103                                              RXON_FILTER_PROMISC_MSK |
1104                                              RXON_FILTER_CTL2HOST_MSK;
1105
1106                 err = iwlagn_commit_rxon(priv, ctx);
1107                 if (err) {
1108                         iwlagn_disable_roc(priv);
1109                         goto out;
1110                 }
1111                 priv->hw_roc_setup = true;
1112         }
1113
1114         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1115         if (err)
1116                 iwlagn_disable_roc(priv);
1117
1118  out:
1119         mutex_unlock(&priv->mutex);
1120         IWL_DEBUG_MAC80211(priv, "leave\n");
1121
1122         return err;
1123 }
1124
1125 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1126 {
1127         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1128
1129         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1130                 return -EOPNOTSUPP;
1131
1132         IWL_DEBUG_MAC80211(priv, "enter\n");
1133         mutex_lock(&priv->mutex);
1134         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1135         iwlagn_disable_roc(priv);
1136         mutex_unlock(&priv->mutex);
1137         IWL_DEBUG_MAC80211(priv, "leave\n");
1138
1139         return 0;
1140 }
1141
1142 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1143                                      enum ieee80211_rssi_event rssi_event)
1144 {
1145         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1146
1147         IWL_DEBUG_MAC80211(priv, "enter\n");
1148         mutex_lock(&priv->mutex);
1149
1150         if (priv->cfg->bt_params &&
1151                         priv->cfg->bt_params->advanced_bt_coexist) {
1152                 if (rssi_event == RSSI_EVENT_LOW)
1153                         priv->bt_enable_pspoll = true;
1154                 else if (rssi_event == RSSI_EVENT_HIGH)
1155                         priv->bt_enable_pspoll = false;
1156
1157                 iwlagn_send_advance_bt_config(priv);
1158         } else {
1159                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1160                                 "ignoring RSSI callback\n");
1161         }
1162
1163         mutex_unlock(&priv->mutex);
1164         IWL_DEBUG_MAC80211(priv, "leave\n");
1165 }
1166
1167 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1168                               struct ieee80211_sta *sta, bool set)
1169 {
1170         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1171
1172         queue_work(priv->workqueue, &priv->beacon_update);
1173
1174         return 0;
1175 }
1176
1177 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1178                               struct ieee80211_vif *vif, u16 queue,
1179                               const struct ieee80211_tx_queue_params *params)
1180 {
1181         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1182         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1183         struct iwl_rxon_context *ctx = vif_priv->ctx;
1184         int q;
1185
1186         if (WARN_ON(!ctx))
1187                 return -EINVAL;
1188
1189         IWL_DEBUG_MAC80211(priv, "enter\n");
1190
1191         if (!iwl_is_ready_rf(priv)) {
1192                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1193                 return -EIO;
1194         }
1195
1196         if (queue >= AC_NUM) {
1197                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1198                 return 0;
1199         }
1200
1201         q = AC_NUM - 1 - queue;
1202
1203         mutex_lock(&priv->mutex);
1204
1205         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1206                 cpu_to_le16(params->cw_min);
1207         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1208                 cpu_to_le16(params->cw_max);
1209         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1210         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1211                         cpu_to_le16((params->txop * 32));
1212
1213         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1214
1215         mutex_unlock(&priv->mutex);
1216
1217         IWL_DEBUG_MAC80211(priv, "leave\n");
1218         return 0;
1219 }
1220
1221 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1222 {
1223         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1224
1225         return priv->ibss_manager == IWL_IBSS_MANAGER;
1226 }
1227
1228 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1229 {
1230         iwl_connection_init_rx_config(priv, ctx);
1231
1232         iwlagn_set_rxon_chain(priv, ctx);
1233
1234         return iwlagn_commit_rxon(priv, ctx);
1235 }
1236
1237 static int iwl_setup_interface(struct iwl_priv *priv,
1238                                struct iwl_rxon_context *ctx)
1239 {
1240         struct ieee80211_vif *vif = ctx->vif;
1241         int err, ac;
1242
1243         lockdep_assert_held(&priv->mutex);
1244
1245         /*
1246          * This variable will be correct only when there's just
1247          * a single context, but all code using it is for hardware
1248          * that supports only one context.
1249          */
1250         priv->iw_mode = vif->type;
1251
1252         ctx->is_active = true;
1253
1254         err = iwl_set_mode(priv, ctx);
1255         if (err) {
1256                 if (!ctx->always_active)
1257                         ctx->is_active = false;
1258                 return err;
1259         }
1260
1261         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1262             vif->type == NL80211_IFTYPE_ADHOC) {
1263                 /*
1264                  * pretend to have high BT traffic as long as we
1265                  * are operating in IBSS mode, as this will cause
1266                  * the rate scaling etc. to behave as intended.
1267                  */
1268                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1269         }
1270
1271         /* set up queue mappings */
1272         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1273                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1274
1275         if (vif->type == NL80211_IFTYPE_AP)
1276                 vif->cab_queue = ctx->mcast_queue;
1277         else
1278                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1279
1280         return 0;
1281 }
1282
1283 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1284                                     struct ieee80211_vif *vif)
1285 {
1286         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1287         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1288         struct iwl_rxon_context *tmp, *ctx = NULL;
1289         int err;
1290         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1291         bool reset = false;
1292
1293         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1294                            viftype, vif->addr);
1295
1296         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1297
1298         mutex_lock(&priv->mutex);
1299
1300         iwlagn_disable_roc(priv);
1301
1302         if (!iwl_is_ready_rf(priv)) {
1303                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1304                 err = -EINVAL;
1305                 goto out;
1306         }
1307
1308         for_each_context(priv, tmp) {
1309                 u32 possible_modes =
1310                         tmp->interface_modes | tmp->exclusive_interface_modes;
1311
1312                 if (tmp->vif) {
1313                         /* On reset we need to add the same interface again */
1314                         if (tmp->vif == vif) {
1315                                 reset = true;
1316                                 ctx = tmp;
1317                                 break;
1318                         }
1319
1320                         /* check if this busy context is exclusive */
1321                         if (tmp->exclusive_interface_modes &
1322                                                 BIT(tmp->vif->type)) {
1323                                 err = -EINVAL;
1324                                 goto out;
1325                         }
1326                         continue;
1327                 }
1328
1329                 if (!(possible_modes & BIT(viftype)))
1330                         continue;
1331
1332                 /* have maybe usable context w/o interface */
1333                 ctx = tmp;
1334                 break;
1335         }
1336
1337         if (!ctx) {
1338                 err = -EOPNOTSUPP;
1339                 goto out;
1340         }
1341
1342         vif_priv->ctx = ctx;
1343         ctx->vif = vif;
1344
1345         err = iwl_setup_interface(priv, ctx);
1346         if (!err || reset)
1347                 goto out;
1348
1349         ctx->vif = NULL;
1350         priv->iw_mode = NL80211_IFTYPE_STATION;
1351  out:
1352         mutex_unlock(&priv->mutex);
1353
1354         IWL_DEBUG_MAC80211(priv, "leave\n");
1355         return err;
1356 }
1357
1358 static void iwl_teardown_interface(struct iwl_priv *priv,
1359                                    struct ieee80211_vif *vif,
1360                                    bool mode_change)
1361 {
1362         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1363
1364         lockdep_assert_held(&priv->mutex);
1365
1366         if (priv->scan_vif == vif) {
1367                 iwl_scan_cancel_timeout(priv, 200);
1368                 iwl_force_scan_end(priv);
1369         }
1370
1371         if (!mode_change) {
1372                 iwl_set_mode(priv, ctx);
1373                 if (!ctx->always_active)
1374                         ctx->is_active = false;
1375         }
1376
1377         /*
1378          * When removing the IBSS interface, overwrite the
1379          * BT traffic load with the stored one from the last
1380          * notification, if any. If this is a device that
1381          * doesn't implement this, this has no effect since
1382          * both values are the same and zero.
1383          */
1384         if (vif->type == NL80211_IFTYPE_ADHOC)
1385                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1386 }
1387
1388 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1389                               struct ieee80211_vif *vif)
1390 {
1391         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1392         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1393
1394         IWL_DEBUG_MAC80211(priv, "enter\n");
1395
1396         mutex_lock(&priv->mutex);
1397
1398         if (WARN_ON(ctx->vif != vif)) {
1399                 struct iwl_rxon_context *tmp;
1400                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1401                 for_each_context(priv, tmp)
1402                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1403                                 tmp->ctxid, tmp, tmp->vif);
1404         }
1405         ctx->vif = NULL;
1406
1407         iwl_teardown_interface(priv, vif, false);
1408
1409         mutex_unlock(&priv->mutex);
1410
1411         IWL_DEBUG_MAC80211(priv, "leave\n");
1412
1413 }
1414
1415 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1416                                 struct ieee80211_vif *vif,
1417                                 enum nl80211_iftype newtype, bool newp2p)
1418 {
1419         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1420         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1421         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1422         struct iwl_rxon_context *tmp;
1423         enum nl80211_iftype newviftype = newtype;
1424         u32 interface_modes;
1425         int err;
1426
1427         IWL_DEBUG_MAC80211(priv, "enter\n");
1428
1429         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1430
1431         mutex_lock(&priv->mutex);
1432
1433         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1434                 /*
1435                  * Huh? But wait ... this can maybe happen when
1436                  * we're in the middle of a firmware restart!
1437                  */
1438                 err = -EBUSY;
1439                 goto out;
1440         }
1441
1442         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1443
1444         if (!(interface_modes & BIT(newtype))) {
1445                 err = -EBUSY;
1446                 goto out;
1447         }
1448
1449         /*
1450          * Refuse a change that should be done by moving from the PAN
1451          * context to the BSS context instead, if the BSS context is
1452          * available and can support the new interface type.
1453          */
1454         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1455             (bss_ctx->interface_modes & BIT(newtype) ||
1456              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1457                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1458                 err = -EBUSY;
1459                 goto out;
1460         }
1461
1462         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1463                 for_each_context(priv, tmp) {
1464                         if (ctx == tmp)
1465                                 continue;
1466
1467                         if (!tmp->vif)
1468                                 continue;
1469
1470                         /*
1471                          * The current mode switch would be exclusive, but
1472                          * another context is active ... refuse the switch.
1473                          */
1474                         err = -EBUSY;
1475                         goto out;
1476                 }
1477         }
1478
1479         /* success */
1480         iwl_teardown_interface(priv, vif, true);
1481         vif->type = newviftype;
1482         vif->p2p = newp2p;
1483         err = iwl_setup_interface(priv, ctx);
1484         WARN_ON(err);
1485         /*
1486          * We've switched internally, but submitting to the
1487          * device may have failed for some reason. Mask this
1488          * error, because otherwise mac80211 will not switch
1489          * (and set the interface type back) and we'll be
1490          * out of sync with it.
1491          */
1492         err = 0;
1493
1494  out:
1495         mutex_unlock(&priv->mutex);
1496         IWL_DEBUG_MAC80211(priv, "leave\n");
1497
1498         return err;
1499 }
1500
1501 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1502                               struct ieee80211_vif *vif,
1503                               struct cfg80211_scan_request *req)
1504 {
1505         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1506         int ret;
1507
1508         IWL_DEBUG_MAC80211(priv, "enter\n");
1509
1510         if (req->n_channels == 0)
1511                 return -EINVAL;
1512
1513         mutex_lock(&priv->mutex);
1514
1515         /*
1516          * If an internal scan is in progress, just set
1517          * up the scan_request as per above.
1518          */
1519         if (priv->scan_type != IWL_SCAN_NORMAL) {
1520                 IWL_DEBUG_SCAN(priv,
1521                                "SCAN request during internal scan - defer\n");
1522                 priv->scan_request = req;
1523                 priv->scan_vif = vif;
1524                 ret = 0;
1525         } else {
1526                 priv->scan_request = req;
1527                 priv->scan_vif = vif;
1528                 /*
1529                  * mac80211 will only ask for one band at a time
1530                  * so using channels[0] here is ok
1531                  */
1532                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1533                                         req->channels[0]->band);
1534                 if (ret) {
1535                         priv->scan_request = NULL;
1536                         priv->scan_vif = NULL;
1537                 }
1538         }
1539
1540         IWL_DEBUG_MAC80211(priv, "leave\n");
1541
1542         mutex_unlock(&priv->mutex);
1543
1544         return ret;
1545 }
1546
1547 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1548 {
1549         struct iwl_addsta_cmd cmd = {
1550                 .mode = STA_CONTROL_MODIFY_MSK,
1551                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1552                 .sta.sta_id = sta_id,
1553         };
1554
1555         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1556 }
1557
1558 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1559                                   struct ieee80211_vif *vif,
1560                                   enum sta_notify_cmd cmd,
1561                                   struct ieee80211_sta *sta)
1562 {
1563         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1564         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1565         int sta_id;
1566
1567         IWL_DEBUG_MAC80211(priv, "enter\n");
1568
1569         switch (cmd) {
1570         case STA_NOTIFY_SLEEP:
1571                 WARN_ON(!sta_priv->client);
1572                 sta_priv->asleep = true;
1573                 if (atomic_read(&sta_priv->pending_frames) > 0)
1574                         ieee80211_sta_block_awake(hw, sta, true);
1575                 break;
1576         case STA_NOTIFY_AWAKE:
1577                 WARN_ON(!sta_priv->client);
1578                 if (!sta_priv->asleep)
1579                         break;
1580                 sta_priv->asleep = false;
1581                 sta_id = iwl_sta_id(sta);
1582                 if (sta_id != IWL_INVALID_STATION)
1583                         iwl_sta_modify_ps_wake(priv, sta_id);
1584                 break;
1585         default:
1586                 break;
1587         }
1588         IWL_DEBUG_MAC80211(priv, "leave\n");
1589 }
1590
1591 struct ieee80211_ops iwlagn_hw_ops = {
1592         .tx = iwlagn_mac_tx,
1593         .start = iwlagn_mac_start,
1594         .stop = iwlagn_mac_stop,
1595 #ifdef CONFIG_PM_SLEEP
1596         .suspend = iwlagn_mac_suspend,
1597         .resume = iwlagn_mac_resume,
1598         .set_wakeup = iwlagn_mac_set_wakeup,
1599 #endif
1600         .add_interface = iwlagn_mac_add_interface,
1601         .remove_interface = iwlagn_mac_remove_interface,
1602         .change_interface = iwlagn_mac_change_interface,
1603         .config = iwlagn_mac_config,
1604         .configure_filter = iwlagn_configure_filter,
1605         .set_key = iwlagn_mac_set_key,
1606         .update_tkip_key = iwlagn_mac_update_tkip_key,
1607         .set_rekey_data = iwlagn_mac_set_rekey_data,
1608         .conf_tx = iwlagn_mac_conf_tx,
1609         .bss_info_changed = iwlagn_bss_info_changed,
1610         .ampdu_action = iwlagn_mac_ampdu_action,
1611         .hw_scan = iwlagn_mac_hw_scan,
1612         .sta_notify = iwlagn_mac_sta_notify,
1613         .sta_state = iwlagn_mac_sta_state,
1614         .channel_switch = iwlagn_mac_channel_switch,
1615         .flush = iwlagn_mac_flush,
1616         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1617         .remain_on_channel = iwlagn_mac_remain_on_channel,
1618         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1619         .rssi_callback = iwlagn_mac_rssi_callback,
1620         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1621         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1622         .set_tim = iwlagn_mac_set_tim,
1623 };
1624
1625 /* This function both allocates and initializes hw and priv. */
1626 struct ieee80211_hw *iwl_alloc_all(void)
1627 {
1628         struct iwl_priv *priv;
1629         struct iwl_op_mode *op_mode;
1630         /* mac80211 allocates memory for this device instance, including
1631          *   space for this driver's private structure */
1632         struct ieee80211_hw *hw;
1633
1634         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1635                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1636         if (!hw)
1637                 goto out;
1638
1639         op_mode = hw->priv;
1640         priv = IWL_OP_MODE_GET_DVM(op_mode);
1641         priv->hw = hw;
1642
1643 out:
1644         return hw;
1645 }