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