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