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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 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_BEFORE_ASSOC |
 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->nvm_data->sku_cap_11n_enable)
 168                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 169                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 170
 171         /*
 172          * Enable 11w if advertised by firmware and software crypto
 173          * is not enabled (as the firmware will interpret some mgmt
 174          * packets, so enabling it with software crypto isn't safe)
 175          */
 176         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 177             !iwlwifi_mod_params.sw_crypto)
 178                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 179
 180         hw->sta_data_size = sizeof(struct iwl_station_priv);
 181         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 182
 183         for_each_context(priv, ctx) {
 184                 hw->wiphy->interface_modes |= ctx->interface_modes;
 185                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 186         }
 187
 188         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 189
 190         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 191                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 192                 hw->wiphy->n_iface_combinations =
 193                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 194         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 195                 hw->wiphy->iface_combinations =
 196                         iwlagn_iface_combinations_dualmode;
 197                 hw->wiphy->n_iface_combinations =
 198                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 199         }
 200
 201         hw->wiphy->max_remain_on_channel_duration = 500;
 202
 203         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 204                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 205                             WIPHY_FLAG_IBSS_RSN;
 206
 207 #ifdef CONFIG_PM_SLEEP
 208         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 209             priv->trans->ops->d3_suspend &&
 210             priv->trans->ops->d3_resume &&
 211             device_can_wakeup(priv->trans->dev)) {
 212                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 213                                           WIPHY_WOWLAN_DISCONNECT |
 214                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 215                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 216                 if (!iwlwifi_mod_params.sw_crypto)
 217                         hw->wiphy->wowlan.flags |=
 218                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 219                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 220
 221                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 222                 hw->wiphy->wowlan.pattern_min_len =
 223                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 224                 hw->wiphy->wowlan.pattern_max_len =
 225                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 226         }
 227 #endif
 228
 229         if (iwlwifi_mod_params.power_save)
 230                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 231         else
 232                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 233
 234         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 235         /* we create the 802.11 header and a max-length SSID element */
 236         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 237
 238         /*
 239          * We don't use all queues: 4 and 9 are unused and any
 240          * aggregation queue gets mapped down to the AC queue.
 241          */
 242         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 243
 244         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 245
 246         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 247                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 248                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 249         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 250                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 251                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 252
 253         hw->wiphy->hw_version = priv->trans->hw_id;
 254
 255         iwl_leds_init(priv);
 256
 257         ret = ieee80211_register_hw(priv->hw);
 258         if (ret) {
 259                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 260                 iwl_leds_exit(priv);
 261                 return ret;
 262         }
 263         priv->mac80211_registered = 1;
 264
 265         return 0;
 266 }
 267
 268 void iwlagn_mac_unregister(struct iwl_priv *priv)
 269 {
 270         if (!priv->mac80211_registered)
 271                 return;
 272         iwl_leds_exit(priv);
 273         ieee80211_unregister_hw(priv->hw);
 274         priv->mac80211_registered = 0;
 275 }
 276
 277 static int __iwl_up(struct iwl_priv *priv)
 278 {
 279         struct iwl_rxon_context *ctx;
 280         int ret;
 281
 282         lockdep_assert_held(&priv->mutex);
 283
 284         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 285                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 286                 return -EIO;
 287         }
 288
 289         for_each_context(priv, ctx) {
 290                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 291                 if (ret) {
 292                         iwl_dealloc_bcast_stations(priv);
 293                         return ret;
 294                 }
 295         }
 296
 297         ret = iwl_run_init_ucode(priv);
 298         if (ret) {
 299                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 300                 goto error;
 301         }
 302
 303         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 304         if (ret) {
 305                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 306                 goto error;
 307         }
 308
 309         ret = iwl_alive_start(priv);
 310         if (ret)
 311                 goto error;
 312         return 0;
 313
 314  error:
 315         set_bit(STATUS_EXIT_PENDING, &priv->status);
 316         iwl_down(priv);
 317         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 318
 319         IWL_ERR(priv, "Unable to initialize device.\n");
 320         return ret;
 321 }
 322
 323 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 324 {
 325         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 326         int ret;
 327
 328         IWL_DEBUG_MAC80211(priv, "enter\n");
 329
 330         /* we should be verifying the device is ready to be opened */
 331         mutex_lock(&priv->mutex);
 332         ret = __iwl_up(priv);
 333         mutex_unlock(&priv->mutex);
 334         if (ret)
 335                 return ret;
 336
 337         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 338
 339         /* Now we should be done, and the READY bit should be set. */
 340         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 341                 ret = -EIO;
 342
 343         iwlagn_led_enable(priv);
 344
 345         priv->is_open = 1;
 346         IWL_DEBUG_MAC80211(priv, "leave\n");
 347         return 0;
 348 }
 349
 350 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 351 {
 352         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 353
 354         IWL_DEBUG_MAC80211(priv, "enter\n");
 355
 356         if (!priv->is_open)
 357                 return;
 358
 359         priv->is_open = 0;
 360
 361         mutex_lock(&priv->mutex);
 362         iwl_down(priv);
 363         mutex_unlock(&priv->mutex);
 364
 365         iwl_cancel_deferred_work(priv);
 366
 367         flush_workqueue(priv->workqueue);
 368
 369         /* User space software may expect getting rfkill changes
 370          * even if interface is down, trans->down will leave the RF
 371          * kill interrupt enabled
 372          */
 373         iwl_trans_stop_hw(priv->trans, false);
 374
 375         IWL_DEBUG_MAC80211(priv, "leave\n");
 376 }
 377
 378 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 379                                       struct ieee80211_vif *vif,
 380                                       struct cfg80211_gtk_rekey_data *data)
 381 {
 382         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 383
 384         if (iwlwifi_mod_params.sw_crypto)
 385                 return;
 386
 387         IWL_DEBUG_MAC80211(priv, "enter\n");
 388         mutex_lock(&priv->mutex);
 389
 390         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 391                 goto out;
 392
 393         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 394         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 395         priv->replay_ctr =
 396                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 397         priv->have_rekey_data = true;
 398
 399  out:
 400         mutex_unlock(&priv->mutex);
 401         IWL_DEBUG_MAC80211(priv, "leave\n");
 402 }
 403
 404 #ifdef CONFIG_PM_SLEEP
 405
 406 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 407                               struct cfg80211_wowlan *wowlan)
 408 {
 409         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 410         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 411         int ret;
 412
 413         if (WARN_ON(!wowlan))
 414                 return -EINVAL;
 415
 416         IWL_DEBUG_MAC80211(priv, "enter\n");
 417         mutex_lock(&priv->mutex);
 418
 419         /* Don't attempt WoWLAN when not associated, tear down instead. */
 420         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 421             !iwl_is_associated_ctx(ctx)) {
 422                 ret = 1;
 423                 goto out;
 424         }
 425
 426         ret = iwlagn_suspend(priv, wowlan);
 427         if (ret)
 428                 goto error;
 429
 430         iwl_trans_d3_suspend(priv->trans);
 431
 432         goto out;
 433
 434  error:
 435         priv->wowlan = false;
 436         iwlagn_prepare_restart(priv);
 437         ieee80211_restart_hw(priv->hw);
 438  out:
 439         mutex_unlock(&priv->mutex);
 440         IWL_DEBUG_MAC80211(priv, "leave\n");
 441
 442         return ret;
 443 }
 444
 445 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 446 {
 447         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 448         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 449         struct ieee80211_vif *vif;
 450         unsigned long flags;
 451         u32 base, status = 0xffffffff;
 452         int ret = -EIO;
 453
 454         IWL_DEBUG_MAC80211(priv, "enter\n");
 455         mutex_lock(&priv->mutex);
 456
 457         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 458                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 459
 460         base = priv->device_pointers.error_event_table;
 461         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 462                 if (iwl_trans_grab_nic_access(priv->trans, true, &flags)) {
 463                         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
 464                         status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 465                         iwl_trans_release_nic_access(priv->trans, &flags);
 466                         ret = 0;
 467                 }
 468
 469 #ifdef CONFIG_IWLWIFI_DEBUGFS
 470                 if (ret == 0) {
 471                         const struct fw_img *img;
 472
 473                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 474                         if (!priv->wowlan_sram) {
 475                                 priv->wowlan_sram =
 476                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 477                                                 GFP_KERNEL);
 478                         }
 479
 480                         if (priv->wowlan_sram)
 481                                 iwl_trans_read_mem(
 482                                       priv->trans, 0x800000,
 483                                       priv->wowlan_sram,
 484                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 485                 }
 486 #endif
 487         }
 488
 489         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 490         vif = ctx->vif;
 491
 492         priv->wowlan = false;
 493
 494         iwlagn_prepare_restart(priv);
 495
 496         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 497         iwl_connection_init_rx_config(priv, ctx);
 498         iwlagn_set_rxon_chain(priv, ctx);
 499
 500         mutex_unlock(&priv->mutex);
 501         IWL_DEBUG_MAC80211(priv, "leave\n");
 502
 503         ieee80211_resume_disconnect(vif);
 504
 505         return 1;
 506 }
 507
 508 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 509 {
 510         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 511
 512         device_set_wakeup_enable(priv->trans->dev, enabled);
 513 }
 514 #endif
 515
 516 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 517                           struct ieee80211_tx_control *control,
 518                           struct sk_buff *skb)
 519 {
 520         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 521
 522         if (iwlagn_tx_skb(priv, control->sta, skb))
 523                 ieee80211_free_txskb(hw, skb);
 524 }
 525
 526 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 527                                        struct ieee80211_vif *vif,
 528                                        struct ieee80211_key_conf *keyconf,
 529                                        struct ieee80211_sta *sta,
 530                                        u32 iv32, u16 *phase1key)
 531 {
 532         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 533
 534         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 535 }
 536
 537 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 538                               struct ieee80211_vif *vif,
 539                               struct ieee80211_sta *sta,
 540                               struct ieee80211_key_conf *key)
 541 {
 542         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 543         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 544         struct iwl_rxon_context *ctx = vif_priv->ctx;
 545         int ret;
 546         bool is_default_wep_key = false;
 547
 548         IWL_DEBUG_MAC80211(priv, "enter\n");
 549
 550         if (iwlwifi_mod_params.sw_crypto) {
 551                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 552                 return -EOPNOTSUPP;
 553         }
 554
 555         switch (key->cipher) {
 556         case WLAN_CIPHER_SUITE_TKIP:
 557                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 558                 /* fall through */
 559         case WLAN_CIPHER_SUITE_CCMP:
 560                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 561                 break;
 562         default:
 563                 break;
 564         }
 565
 566         /*
 567          * We could program these keys into the hardware as well, but we
 568          * don't expect much multicast traffic in IBSS and having keys
 569          * for more stations is probably more useful.
 570          *
 571          * Mark key TX-only and return 0.
 572          */
 573         if (vif->type == NL80211_IFTYPE_ADHOC &&
 574             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 575                 key->hw_key_idx = WEP_INVALID_OFFSET;
 576                 return 0;
 577         }
 578
 579         /* If they key was TX-only, accept deletion */
 580         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 581                 return 0;
 582
 583         mutex_lock(&priv->mutex);
 584         iwl_scan_cancel_timeout(priv, 100);
 585
 586         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 587
 588         /*
 589          * If we are getting WEP group key and we didn't receive any key mapping
 590          * so far, we are in legacy wep mode (group key only), otherwise we are
 591          * in 1X mode.
 592          * In legacy wep mode, we use another host command to the uCode.
 593          */
 594         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 595              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 596                 if (cmd == SET_KEY)
 597                         is_default_wep_key = !ctx->key_mapping_keys;
 598                 else
 599                         is_default_wep_key =
 600                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 601         }
 602
 603
 604         switch (cmd) {
 605         case SET_KEY:
 606                 if (is_default_wep_key) {
 607                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 608                         break;
 609                 }
 610                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 611                 if (ret) {
 612                         /*
 613                          * can't add key for RX, but we don't need it
 614                          * in the device for TX so still return 0
 615                          */
 616                         ret = 0;
 617                         key->hw_key_idx = WEP_INVALID_OFFSET;
 618                 }
 619
 620                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 621                 break;
 622         case DISABLE_KEY:
 623                 if (is_default_wep_key)
 624                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 625                 else
 626                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 627
 628                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 629                 break;
 630         default:
 631                 ret = -EINVAL;
 632         }
 633
 634         mutex_unlock(&priv->mutex);
 635         IWL_DEBUG_MAC80211(priv, "leave\n");
 636
 637         return ret;
 638 }
 639
 640 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 641                                    struct ieee80211_vif *vif,
 642                                    enum ieee80211_ampdu_mlme_action action,
 643                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 644                                    u8 buf_size)
 645 {
 646         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 647         int ret = -EINVAL;
 648         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 649
 650         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 651                      sta->addr, tid);
 652
 653         if (!(priv->nvm_data->sku_cap_11n_enable))
 654                 return -EACCES;
 655
 656         IWL_DEBUG_MAC80211(priv, "enter\n");
 657         mutex_lock(&priv->mutex);
 658
 659         switch (action) {
 660         case IEEE80211_AMPDU_RX_START:
 661                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 662                         break;
 663                 IWL_DEBUG_HT(priv, "start Rx\n");
 664                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 665                 break;
 666         case IEEE80211_AMPDU_RX_STOP:
 667                 IWL_DEBUG_HT(priv, "stop Rx\n");
 668                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 669                 break;
 670         case IEEE80211_AMPDU_TX_START:
 671                 if (!priv->trans->ops->txq_enable)
 672                         break;
 673                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 674                         break;
 675                 IWL_DEBUG_HT(priv, "start Tx\n");
 676                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 677                 break;
 678         case IEEE80211_AMPDU_TX_STOP_CONT:
 679         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 680         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 681                 IWL_DEBUG_HT(priv, "stop Tx\n");
 682                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 683                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 684                         priv->agg_tids_count--;
 685                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 686                                      priv->agg_tids_count);
 687                 }
 688                 if (!priv->agg_tids_count &&
 689                     priv->hw_params.use_rts_for_aggregation) {
 690                         /*
 691                          * switch off RTS/CTS if it was previously enabled
 692                          */
 693                         sta_priv->lq_sta.lq.general_params.flags &=
 694                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 695                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 696                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 697                 }
 698                 break;
 699         case IEEE80211_AMPDU_TX_OPERATIONAL:
 700                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 701                 break;
 702         }
 703         mutex_unlock(&priv->mutex);
 704         IWL_DEBUG_MAC80211(priv, "leave\n");
 705         return ret;
 706 }
 707
 708 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 709                               struct ieee80211_vif *vif,
 710                               struct ieee80211_sta *sta)
 711 {
 712         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 713         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 714         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 715         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 716         int ret;
 717         u8 sta_id;
 718
 719         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 720                         sta->addr);
 721         sta_priv->sta_id = IWL_INVALID_STATION;
 722
 723         atomic_set(&sta_priv->pending_frames, 0);
 724         if (vif->type == NL80211_IFTYPE_AP)
 725                 sta_priv->client = true;
 726
 727         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 728                                      is_ap, sta, &sta_id);
 729         if (ret) {
 730                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 731                         sta->addr, ret);
 732                 /* Should we return success if return code is EEXIST ? */
 733                 return ret;
 734         }
 735
 736         sta_priv->sta_id = sta_id;
 737
 738         return 0;
 739 }
 740
 741 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 742                                  struct ieee80211_vif *vif,
 743                                  struct ieee80211_sta *sta)
 744 {
 745         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 746         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 747         int ret;
 748
 749         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 750
 751         if (vif->type == NL80211_IFTYPE_STATION) {
 752                 /*
 753                  * Station will be removed from device when the RXON
 754                  * is set to unassociated -- just deactivate it here
 755                  * to avoid re-programming it.
 756                  */
 757                 ret = 0;
 758                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 759         } else {
 760                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 761                 if (ret)
 762                         IWL_DEBUG_QUIET_RFKILL(priv,
 763                                 "Error removing station %pM\n", sta->addr);
 764         }
 765         return ret;
 766 }
 767
 768 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 769                                 struct ieee80211_vif *vif,
 770                                 struct ieee80211_sta *sta,
 771                                 enum ieee80211_sta_state old_state,
 772                                 enum ieee80211_sta_state new_state)
 773 {
 774         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 775         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 776         enum {
 777                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 778         } op = NONE;
 779         int ret;
 780
 781         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 782                            sta->addr, old_state, new_state);
 783
 784         mutex_lock(&priv->mutex);
 785         if (vif->type == NL80211_IFTYPE_STATION) {
 786                 if (old_state == IEEE80211_STA_NOTEXIST &&
 787                     new_state == IEEE80211_STA_NONE)
 788                         op = ADD;
 789                 else if (old_state == IEEE80211_STA_NONE &&
 790                          new_state == IEEE80211_STA_NOTEXIST)
 791                         op = REMOVE;
 792                 else if (old_state == IEEE80211_STA_AUTH &&
 793                          new_state == IEEE80211_STA_ASSOC)
 794                         op = HT_RATE_INIT;
 795         } else {
 796                 if (old_state == IEEE80211_STA_AUTH &&
 797                     new_state == IEEE80211_STA_ASSOC)
 798                         op = ADD_RATE_INIT;
 799                 else if (old_state == IEEE80211_STA_ASSOC &&
 800                          new_state == IEEE80211_STA_AUTH)
 801                         op = REMOVE;
 802         }
 803
 804         switch (op) {
 805         case ADD:
 806                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 807                 if (ret)
 808                         break;
 809                 /*
 810                  * Clear the in-progress flag, the AP station entry was added
 811                  * but we'll initialize LQ only when we've associated (which
 812                  * would also clear the in-progress flag). This is necessary
 813                  * in case we never initialize LQ because association fails.
 814                  */
 815                 spin_lock_bh(&priv->sta_lock);
 816                 priv->stations[iwl_sta_id(sta)].used &=
 817                         ~IWL_STA_UCODE_INPROGRESS;
 818                 spin_unlock_bh(&priv->sta_lock);
 819                 break;
 820         case REMOVE:
 821                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 822                 break;
 823         case ADD_RATE_INIT:
 824                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 825                 if (ret)
 826                         break;
 827                 /* Initialize rate scaling */
 828                 IWL_DEBUG_INFO(priv,
 829                                "Initializing rate scaling for station %pM\n",
 830                                sta->addr);
 831                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 832                 ret = 0;
 833                 break;
 834         case HT_RATE_INIT:
 835                 /* Initialize rate scaling */
 836                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 837                 if (ret)
 838                         break;
 839                 IWL_DEBUG_INFO(priv,
 840                                "Initializing rate scaling for station %pM\n",
 841                                sta->addr);
 842                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 843                 ret = 0;
 844                 break;
 845         default:
 846                 ret = 0;
 847                 break;
 848         }
 849
 850         /*
 851          * mac80211 might WARN if we fail, but due the way we
 852          * (badly) handle hard rfkill, we might fail here
 853          */
 854         if (iwl_is_rfkill(priv))
 855                 ret = 0;
 856
 857         mutex_unlock(&priv->mutex);
 858         IWL_DEBUG_MAC80211(priv, "leave\n");
 859
 860         return ret;
 861 }
 862
 863 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 864                                       struct ieee80211_channel_switch *ch_switch)
 865 {
 866         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 867         struct ieee80211_conf *conf = &hw->conf;
 868         struct ieee80211_channel *channel = ch_switch->channel;
 869         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 870         /*
 871          * MULTI-FIXME
 872          * When we add support for multiple interfaces, we need to
 873          * revisit this. The channel switch command in the device
 874          * only affects the BSS context, but what does that really
 875          * mean? And what if we get a CSA on the second interface?
 876          * This needs a lot of work.
 877          */
 878         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 879         u16 ch;
 880
 881         IWL_DEBUG_MAC80211(priv, "enter\n");
 882
 883         mutex_lock(&priv->mutex);
 884
 885         if (iwl_is_rfkill(priv))
 886                 goto out;
 887
 888         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 889             test_bit(STATUS_SCANNING, &priv->status) ||
 890             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 891                 goto out;
 892
 893         if (!iwl_is_associated_ctx(ctx))
 894                 goto out;
 895
 896         if (!priv->lib->set_channel_switch)
 897                 goto out;
 898
 899         ch = channel->hw_value;
 900         if (le16_to_cpu(ctx->active.channel) == ch)
 901                 goto out;
 902
 903         priv->current_ht_config.smps = conf->smps_mode;
 904
 905         /* Configure HT40 channels */
 906         ctx->ht.enabled = conf_is_ht(conf);
 907         if (ctx->ht.enabled)
 908                 iwlagn_config_ht40(conf, ctx);
 909         else
 910                 ctx->ht.is_40mhz = false;
 911
 912         if ((le16_to_cpu(ctx->staging.channel) != ch))
 913                 ctx->staging.flags = 0;
 914
 915         iwl_set_rxon_channel(priv, channel, ctx);
 916         iwl_set_rxon_ht(priv, ht_conf);
 917         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 918
 919         /*
 920          * at this point, staging_rxon has the
 921          * configuration for channel switch
 922          */
 923         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 924         priv->switch_channel = cpu_to_le16(ch);
 925         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 926                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 927                 priv->switch_channel = 0;
 928                 ieee80211_chswitch_done(ctx->vif, false);
 929         }
 930
 931 out:
 932         mutex_unlock(&priv->mutex);
 933         IWL_DEBUG_MAC80211(priv, "leave\n");
 934 }
 935
 936 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 937 {
 938         /*
 939          * MULTI-FIXME
 940          * See iwlagn_mac_channel_switch.
 941          */
 942         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 943
 944         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 945                 return;
 946
 947         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 948                 ieee80211_chswitch_done(ctx->vif, is_success);
 949 }
 950
 951 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 952                                     unsigned int changed_flags,
 953                                     unsigned int *total_flags,
 954                                     u64 multicast)
 955 {
 956         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 957         __le32 filter_or = 0, filter_nand = 0;
 958         struct iwl_rxon_context *ctx;
 959
 960 #define CHK(test, flag) do { \
 961         if (*total_flags & (test))              \
 962                 filter_or |= (flag);            \
 963         else                                    \
 964                 filter_nand |= (flag);          \
 965         } while (0)
 966
 967         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 968                         changed_flags, *total_flags);
 969
 970         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 971         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 972         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 973         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 974
 975 #undef CHK
 976
 977         mutex_lock(&priv->mutex);
 978
 979         for_each_context(priv, ctx) {
 980                 ctx->staging.filter_flags &= ~filter_nand;
 981                 ctx->staging.filter_flags |= filter_or;
 982
 983                 /*
 984                  * Not committing directly because hardware can perform a scan,
 985                  * but we'll eventually commit the filter flags change anyway.
 986                  */
 987         }
 988
 989         mutex_unlock(&priv->mutex);
 990
 991         /*
 992          * Receiving all multicast frames is always enabled by the
 993          * default flags setup in iwl_connection_init_rx_config()
 994          * since we currently do not support programming multicast
 995          * filters into the device.
 996          */
 997         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 998                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 999 }
1000
1001 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1002 {
1003         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1004
1005         mutex_lock(&priv->mutex);
1006         IWL_DEBUG_MAC80211(priv, "enter\n");
1007
1008         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1009                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1010                 goto done;
1011         }
1012         if (iwl_is_rfkill(priv)) {
1013                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1014                 goto done;
1015         }
1016
1017         /*
1018          * mac80211 will not push any more frames for transmit
1019          * until the flush is completed
1020          */
1021         if (drop) {
1022                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1023                 if (iwlagn_txfifo_flush(priv)) {
1024                         IWL_ERR(priv, "flush request fail\n");
1025                         goto done;
1026                 }
1027         }
1028         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1029         iwl_trans_wait_tx_queue_empty(priv->trans);
1030 done:
1031         mutex_unlock(&priv->mutex);
1032         IWL_DEBUG_MAC80211(priv, "leave\n");
1033 }
1034
1035 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1036                                      struct ieee80211_vif *vif,
1037                                      struct ieee80211_channel *channel,
1038                                      int duration)
1039 {
1040         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1041         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1042         int err = 0;
1043
1044         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1045                 return -EOPNOTSUPP;
1046
1047         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1048                 return -EOPNOTSUPP;
1049
1050         IWL_DEBUG_MAC80211(priv, "enter\n");
1051         mutex_lock(&priv->mutex);
1052
1053         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1054                 /* mac80211 should not scan while ROC or ROC while scanning */
1055                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1056                         err = -EBUSY;
1057                         goto out;
1058                 }
1059
1060                 iwl_scan_cancel_timeout(priv, 100);
1061
1062                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1063                         err = -EBUSY;
1064                         goto out;
1065                 }
1066         }
1067
1068         priv->hw_roc_channel = channel;
1069         /* convert from ms to TU */
1070         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1071         priv->hw_roc_start_notified = false;
1072         cancel_delayed_work(&priv->hw_roc_disable_work);
1073
1074         if (!ctx->is_active) {
1075                 static const struct iwl_qos_info default_qos_data = {
1076                         .def_qos_parm = {
1077                                 .ac[0] = {
1078                                         .cw_min = cpu_to_le16(3),
1079                                         .cw_max = cpu_to_le16(7),
1080                                         .aifsn = 2,
1081                                         .edca_txop = cpu_to_le16(1504),
1082                                 },
1083                                 .ac[1] = {
1084                                         .cw_min = cpu_to_le16(7),
1085                                         .cw_max = cpu_to_le16(15),
1086                                         .aifsn = 2,
1087                                         .edca_txop = cpu_to_le16(3008),
1088                                 },
1089                                 .ac[2] = {
1090                                         .cw_min = cpu_to_le16(15),
1091                                         .cw_max = cpu_to_le16(1023),
1092                                         .aifsn = 3,
1093                                 },
1094                                 .ac[3] = {
1095                                         .cw_min = cpu_to_le16(15),
1096                                         .cw_max = cpu_to_le16(1023),
1097                                         .aifsn = 7,
1098                                 },
1099                         },
1100                 };
1101
1102                 ctx->is_active = true;
1103                 ctx->qos_data = default_qos_data;
1104                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1105                 memcpy(ctx->staging.node_addr,
1106                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1107                        ETH_ALEN);
1108                 memcpy(ctx->staging.bssid_addr,
1109                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1110                        ETH_ALEN);
1111                 err = iwlagn_commit_rxon(priv, ctx);
1112                 if (err)
1113                         goto out;
1114                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1115                                              RXON_FILTER_PROMISC_MSK |
1116                                              RXON_FILTER_CTL2HOST_MSK;
1117
1118                 err = iwlagn_commit_rxon(priv, ctx);
1119                 if (err) {
1120                         iwlagn_disable_roc(priv);
1121                         goto out;
1122                 }
1123                 priv->hw_roc_setup = true;
1124         }
1125
1126         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1127         if (err)
1128                 iwlagn_disable_roc(priv);
1129
1130  out:
1131         mutex_unlock(&priv->mutex);
1132         IWL_DEBUG_MAC80211(priv, "leave\n");
1133
1134         return err;
1135 }
1136
1137 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1138 {
1139         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1140
1141         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1142                 return -EOPNOTSUPP;
1143
1144         IWL_DEBUG_MAC80211(priv, "enter\n");
1145         mutex_lock(&priv->mutex);
1146         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1147         iwlagn_disable_roc(priv);
1148         mutex_unlock(&priv->mutex);
1149         IWL_DEBUG_MAC80211(priv, "leave\n");
1150
1151         return 0;
1152 }
1153
1154 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1155                                      struct ieee80211_vif *vif,
1156                                      enum ieee80211_rssi_event rssi_event)
1157 {
1158         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1159
1160         IWL_DEBUG_MAC80211(priv, "enter\n");
1161         mutex_lock(&priv->mutex);
1162
1163         if (priv->cfg->bt_params &&
1164                         priv->cfg->bt_params->advanced_bt_coexist) {
1165                 if (rssi_event == RSSI_EVENT_LOW)
1166                         priv->bt_enable_pspoll = true;
1167                 else if (rssi_event == RSSI_EVENT_HIGH)
1168                         priv->bt_enable_pspoll = false;
1169
1170                 iwlagn_send_advance_bt_config(priv);
1171         } else {
1172                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1173                                 "ignoring RSSI callback\n");
1174         }
1175
1176         mutex_unlock(&priv->mutex);
1177         IWL_DEBUG_MAC80211(priv, "leave\n");
1178 }
1179
1180 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1181                               struct ieee80211_sta *sta, bool set)
1182 {
1183         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1184
1185         queue_work(priv->workqueue, &priv->beacon_update);
1186
1187         return 0;
1188 }
1189
1190 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1191                               struct ieee80211_vif *vif, u16 queue,
1192                               const struct ieee80211_tx_queue_params *params)
1193 {
1194         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1195         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1196         struct iwl_rxon_context *ctx = vif_priv->ctx;
1197         int q;
1198
1199         if (WARN_ON(!ctx))
1200                 return -EINVAL;
1201
1202         IWL_DEBUG_MAC80211(priv, "enter\n");
1203
1204         if (!iwl_is_ready_rf(priv)) {
1205                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1206                 return -EIO;
1207         }
1208
1209         if (queue >= AC_NUM) {
1210                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1211                 return 0;
1212         }
1213
1214         q = AC_NUM - 1 - queue;
1215
1216         mutex_lock(&priv->mutex);
1217
1218         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1219                 cpu_to_le16(params->cw_min);
1220         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1221                 cpu_to_le16(params->cw_max);
1222         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1223         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1224                         cpu_to_le16((params->txop * 32));
1225
1226         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1227
1228         mutex_unlock(&priv->mutex);
1229
1230         IWL_DEBUG_MAC80211(priv, "leave\n");
1231         return 0;
1232 }
1233
1234 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1235 {
1236         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1237
1238         return priv->ibss_manager == IWL_IBSS_MANAGER;
1239 }
1240
1241 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1242 {
1243         iwl_connection_init_rx_config(priv, ctx);
1244
1245         iwlagn_set_rxon_chain(priv, ctx);
1246
1247         return iwlagn_commit_rxon(priv, ctx);
1248 }
1249
1250 static int iwl_setup_interface(struct iwl_priv *priv,
1251                                struct iwl_rxon_context *ctx)
1252 {
1253         struct ieee80211_vif *vif = ctx->vif;
1254         int err, ac;
1255
1256         lockdep_assert_held(&priv->mutex);
1257
1258         /*
1259          * This variable will be correct only when there's just
1260          * a single context, but all code using it is for hardware
1261          * that supports only one context.
1262          */
1263         priv->iw_mode = vif->type;
1264
1265         ctx->is_active = true;
1266
1267         err = iwl_set_mode(priv, ctx);
1268         if (err) {
1269                 if (!ctx->always_active)
1270                         ctx->is_active = false;
1271                 return err;
1272         }
1273
1274         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1275             vif->type == NL80211_IFTYPE_ADHOC) {
1276                 /*
1277                  * pretend to have high BT traffic as long as we
1278                  * are operating in IBSS mode, as this will cause
1279                  * the rate scaling etc. to behave as intended.
1280                  */
1281                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1282         }
1283
1284         /* set up queue mappings */
1285         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1286                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1287
1288         if (vif->type == NL80211_IFTYPE_AP)
1289                 vif->cab_queue = ctx->mcast_queue;
1290         else
1291                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1292
1293         return 0;
1294 }
1295
1296 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1297                                     struct ieee80211_vif *vif)
1298 {
1299         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1300         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1301         struct iwl_rxon_context *tmp, *ctx = NULL;
1302         int err;
1303         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1304         bool reset = false;
1305
1306         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1307                            viftype, vif->addr);
1308
1309         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1310
1311         mutex_lock(&priv->mutex);
1312
1313         iwlagn_disable_roc(priv);
1314
1315         if (!iwl_is_ready_rf(priv)) {
1316                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1317                 err = -EINVAL;
1318                 goto out;
1319         }
1320
1321         for_each_context(priv, tmp) {
1322                 u32 possible_modes =
1323                         tmp->interface_modes | tmp->exclusive_interface_modes;
1324
1325                 if (tmp->vif) {
1326                         /* On reset we need to add the same interface again */
1327                         if (tmp->vif == vif) {
1328                                 reset = true;
1329                                 ctx = tmp;
1330                                 break;
1331                         }
1332
1333                         /* check if this busy context is exclusive */
1334                         if (tmp->exclusive_interface_modes &
1335                                                 BIT(tmp->vif->type)) {
1336                                 err = -EINVAL;
1337                                 goto out;
1338                         }
1339                         continue;
1340                 }
1341
1342                 if (!(possible_modes & BIT(viftype)))
1343                         continue;
1344
1345                 /* have maybe usable context w/o interface */
1346                 ctx = tmp;
1347                 break;
1348         }
1349
1350         if (!ctx) {
1351                 err = -EOPNOTSUPP;
1352                 goto out;
1353         }
1354
1355         vif_priv->ctx = ctx;
1356         ctx->vif = vif;
1357
1358         /*
1359          * In SNIFFER device type, the firmware reports the FCS to
1360          * the host, rather than snipping it off. Unfortunately,
1361          * mac80211 doesn't (yet) provide a per-packet flag for
1362          * this, so that we have to set the hardware flag based
1363          * on the interfaces added. As the monitor interface can
1364          * only be present by itself, and will be removed before
1365          * other interfaces are added, this is safe.
1366          */
1367         if (vif->type == NL80211_IFTYPE_MONITOR)
1368                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1369         else
1370                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1371
1372         err = iwl_setup_interface(priv, ctx);
1373         if (!err || reset)
1374                 goto out;
1375
1376         ctx->vif = NULL;
1377         priv->iw_mode = NL80211_IFTYPE_STATION;
1378  out:
1379         mutex_unlock(&priv->mutex);
1380
1381         IWL_DEBUG_MAC80211(priv, "leave\n");
1382         return err;
1383 }
1384
1385 static void iwl_teardown_interface(struct iwl_priv *priv,
1386                                    struct ieee80211_vif *vif,
1387                                    bool mode_change)
1388 {
1389         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1390
1391         lockdep_assert_held(&priv->mutex);
1392
1393         if (priv->scan_vif == vif) {
1394                 iwl_scan_cancel_timeout(priv, 200);
1395                 iwl_force_scan_end(priv);
1396         }
1397
1398         if (!mode_change) {
1399                 iwl_set_mode(priv, ctx);
1400                 if (!ctx->always_active)
1401                         ctx->is_active = false;
1402         }
1403
1404         /*
1405          * When removing the IBSS interface, overwrite the
1406          * BT traffic load with the stored one from the last
1407          * notification, if any. If this is a device that
1408          * doesn't implement this, this has no effect since
1409          * both values are the same and zero.
1410          */
1411         if (vif->type == NL80211_IFTYPE_ADHOC)
1412                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1413 }
1414
1415 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1416                               struct ieee80211_vif *vif)
1417 {
1418         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1419         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1420
1421         IWL_DEBUG_MAC80211(priv, "enter\n");
1422
1423         mutex_lock(&priv->mutex);
1424
1425         if (WARN_ON(ctx->vif != vif)) {
1426                 struct iwl_rxon_context *tmp;
1427                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1428                 for_each_context(priv, tmp)
1429                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1430                                 tmp->ctxid, tmp, tmp->vif);
1431         }
1432         ctx->vif = NULL;
1433
1434         iwl_teardown_interface(priv, vif, false);
1435
1436         mutex_unlock(&priv->mutex);
1437
1438         IWL_DEBUG_MAC80211(priv, "leave\n");
1439
1440 }
1441
1442 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1443                                        struct ieee80211_vif *vif,
1444                                        enum nl80211_iftype newtype, bool newp2p)
1445 {
1446         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1447         struct iwl_rxon_context *ctx, *tmp;
1448         enum nl80211_iftype newviftype = newtype;
1449         u32 interface_modes;
1450         int err;
1451
1452         IWL_DEBUG_MAC80211(priv, "enter\n");
1453
1454         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1455
1456         mutex_lock(&priv->mutex);
1457
1458         ctx = iwl_rxon_ctx_from_vif(vif);
1459
1460         /*
1461          * To simplify this code, only support changes on the
1462          * BSS context. The PAN context is usually reassigned
1463          * by creating/removing P2P interfaces anyway.
1464          */
1465         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1466                 err = -EBUSY;
1467                 goto out;
1468         }
1469
1470         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1471                 /*
1472                  * Huh? But wait ... this can maybe happen when
1473                  * we're in the middle of a firmware restart!
1474                  */
1475                 err = -EBUSY;
1476                 goto out;
1477         }
1478
1479         /* Check if the switch is supported in the same context */
1480         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1481         if (!(interface_modes & BIT(newtype))) {
1482                 err = -EBUSY;
1483                 goto out;
1484         }
1485
1486         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1487                 for_each_context(priv, tmp) {
1488                         if (ctx == tmp)
1489                                 continue;
1490
1491                         if (!tmp->is_active)
1492                                 continue;
1493
1494                         /*
1495                          * The current mode switch would be exclusive, but
1496                          * another context is active ... refuse the switch.
1497                          */
1498                         err = -EBUSY;
1499                         goto out;
1500                 }
1501         }
1502
1503         /* success */
1504         iwl_teardown_interface(priv, vif, true);
1505         vif->type = newviftype;
1506         vif->p2p = newp2p;
1507         err = iwl_setup_interface(priv, ctx);
1508         WARN_ON(err);
1509         /*
1510          * We've switched internally, but submitting to the
1511          * device may have failed for some reason. Mask this
1512          * error, because otherwise mac80211 will not switch
1513          * (and set the interface type back) and we'll be
1514          * out of sync with it.
1515          */
1516         err = 0;
1517
1518  out:
1519         mutex_unlock(&priv->mutex);
1520         IWL_DEBUG_MAC80211(priv, "leave\n");
1521
1522         return err;
1523 }
1524
1525 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1526                               struct ieee80211_vif *vif,
1527                               struct cfg80211_scan_request *req)
1528 {
1529         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1530         int ret;
1531
1532         IWL_DEBUG_MAC80211(priv, "enter\n");
1533
1534         if (req->n_channels == 0)
1535                 return -EINVAL;
1536
1537         mutex_lock(&priv->mutex);
1538
1539         /*
1540          * If an internal scan is in progress, just set
1541          * up the scan_request as per above.
1542          */
1543         if (priv->scan_type != IWL_SCAN_NORMAL) {
1544                 IWL_DEBUG_SCAN(priv,
1545                                "SCAN request during internal scan - defer\n");
1546                 priv->scan_request = req;
1547                 priv->scan_vif = vif;
1548                 ret = 0;
1549         } else {
1550                 priv->scan_request = req;
1551                 priv->scan_vif = vif;
1552                 /*
1553                  * mac80211 will only ask for one band at a time
1554                  * so using channels[0] here is ok
1555                  */
1556                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1557                                         req->channels[0]->band);
1558                 if (ret) {
1559                         priv->scan_request = NULL;
1560                         priv->scan_vif = NULL;
1561                 }
1562         }
1563
1564         IWL_DEBUG_MAC80211(priv, "leave\n");
1565
1566         mutex_unlock(&priv->mutex);
1567
1568         return ret;
1569 }
1570
1571 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1572 {
1573         struct iwl_addsta_cmd cmd = {
1574                 .mode = STA_CONTROL_MODIFY_MSK,
1575                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1576                 .sta.sta_id = sta_id,
1577         };
1578
1579         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1580 }
1581
1582 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1583                                   struct ieee80211_vif *vif,
1584                                   enum sta_notify_cmd cmd,
1585                                   struct ieee80211_sta *sta)
1586 {
1587         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1588         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1589         int sta_id;
1590
1591         IWL_DEBUG_MAC80211(priv, "enter\n");
1592
1593         switch (cmd) {
1594         case STA_NOTIFY_SLEEP:
1595                 WARN_ON(!sta_priv->client);
1596                 sta_priv->asleep = true;
1597                 if (atomic_read(&sta_priv->pending_frames) > 0)
1598                         ieee80211_sta_block_awake(hw, sta, true);
1599                 break;
1600         case STA_NOTIFY_AWAKE:
1601                 WARN_ON(!sta_priv->client);
1602                 if (!sta_priv->asleep)
1603                         break;
1604                 sta_priv->asleep = false;
1605                 sta_id = iwl_sta_id(sta);
1606                 if (sta_id != IWL_INVALID_STATION)
1607                         iwl_sta_modify_ps_wake(priv, sta_id);
1608                 break;
1609         default:
1610                 break;
1611         }
1612         IWL_DEBUG_MAC80211(priv, "leave\n");
1613 }
1614
1615 struct ieee80211_ops iwlagn_hw_ops = {
1616         .tx = iwlagn_mac_tx,
1617         .start = iwlagn_mac_start,
1618         .stop = iwlagn_mac_stop,
1619 #ifdef CONFIG_PM_SLEEP
1620         .suspend = iwlagn_mac_suspend,
1621         .resume = iwlagn_mac_resume,
1622         .set_wakeup = iwlagn_mac_set_wakeup,
1623 #endif
1624         .add_interface = iwlagn_mac_add_interface,
1625         .remove_interface = iwlagn_mac_remove_interface,
1626         .change_interface = iwlagn_mac_change_interface,
1627         .config = iwlagn_mac_config,
1628         .configure_filter = iwlagn_configure_filter,
1629         .set_key = iwlagn_mac_set_key,
1630         .update_tkip_key = iwlagn_mac_update_tkip_key,
1631         .set_rekey_data = iwlagn_mac_set_rekey_data,
1632         .conf_tx = iwlagn_mac_conf_tx,
1633         .bss_info_changed = iwlagn_bss_info_changed,
1634         .ampdu_action = iwlagn_mac_ampdu_action,
1635         .hw_scan = iwlagn_mac_hw_scan,
1636         .sta_notify = iwlagn_mac_sta_notify,
1637         .sta_state = iwlagn_mac_sta_state,
1638         .channel_switch = iwlagn_mac_channel_switch,
1639         .flush = iwlagn_mac_flush,
1640         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1641         .remain_on_channel = iwlagn_mac_remain_on_channel,
1642         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1643         .rssi_callback = iwlagn_mac_rssi_callback,
1644         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1645         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1646         .set_tim = iwlagn_mac_set_tim,
1647 };
1648
1649 /* This function both allocates and initializes hw and priv. */
1650 struct ieee80211_hw *iwl_alloc_all(void)
1651 {
1652         struct iwl_priv *priv;
1653         struct iwl_op_mode *op_mode;
1654         /* mac80211 allocates memory for this device instance, including
1655          *   space for this driver's private structure */
1656         struct ieee80211_hw *hw;
1657
1658         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1659                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1660         if (!hw)
1661                 goto out;
1662
1663         op_mode = hw->priv;
1664         priv = IWL_OP_MODE_GET_DVM(op_mode);
1665         priv->hw = hw;
1666
1667 out:
1668         return hw;
1669 }