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-ucode.h"
  46 #include "iwl-eeprom.h"
  47 #include "iwl-wifi.h"
  48 #include "iwl-dev.h"
  49 #include "iwl-core.h"
  50 #include "iwl-io.h"
  51 #include "iwl-agn-calib.h"
  52 #include "iwl-agn.h"
  53 #include "iwl-shared.h"
  54 #include "iwl-trans.h"
  55 #include "iwl-op-mode.h"
  56
  57 /*****************************************************************************
  58  *
  59  * mac80211 entry point functions
  60  *
  61  *****************************************************************************/
  62
  63 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  64         {
  65                 .max = 1,
  66                 .types = BIT(NL80211_IFTYPE_STATION),
  67         },
  68         {
  69                 .max = 1,
  70                 .types = BIT(NL80211_IFTYPE_AP),
  71         },
  72 };
  73
  74 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  75         {
  76                 .max = 2,
  77                 .types = BIT(NL80211_IFTYPE_STATION),
  78         },
  79 };
  80
  81 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  82         {
  83                 .max = 1,
  84                 .types = BIT(NL80211_IFTYPE_STATION),
  85         },
  86         {
  87                 .max = 1,
  88                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  89                          BIT(NL80211_IFTYPE_AP),
  90         },
  91 };
  92
  93 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  94         {
  95                 .max = 2,
  96                 .types = BIT(NL80211_IFTYPE_STATION),
  97         },
  98         {
  99                 .max = 1,
 100                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
 101         },
 102 };
 103
 104 static const struct ieee80211_iface_combination
 105 iwlagn_iface_combinations_dualmode[] = {
 106         { .num_different_channels = 1,
 107           .max_interfaces = 2,
 108           .beacon_int_infra_match = true,
 109           .limits = iwlagn_sta_ap_limits,
 110           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 111         },
 112         { .num_different_channels = 1,
 113           .max_interfaces = 2,
 114           .limits = iwlagn_2sta_limits,
 115           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 116         },
 117 };
 118
 119 static const struct ieee80211_iface_combination
 120 iwlagn_iface_combinations_p2p[] = {
 121         { .num_different_channels = 1,
 122           .max_interfaces = 2,
 123           .beacon_int_infra_match = true,
 124           .limits = iwlagn_p2p_sta_go_limits,
 125           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 126         },
 127         { .num_different_channels = 1,
 128           .max_interfaces = 2,
 129           .limits = iwlagn_p2p_2sta_limits,
 130           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 131         },
 132 };
 133
 134 /*
 135  * Not a mac80211 entry point function, but it fits in with all the
 136  * other mac80211 functions grouped here.
 137  */
 138 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 139                                   struct iwl_ucode_capabilities *capa)
 140 {
 141         int ret;
 142         struct ieee80211_hw *hw = priv->hw;
 143         struct iwl_rxon_context *ctx;
 144
 145         hw->rate_control_algorithm = "iwl-agn-rs";
 146
 147         /* Tell mac80211 our characteristics */
 148         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 149                     IEEE80211_HW_AMPDU_AGGREGATION |
 150                     IEEE80211_HW_NEED_DTIM_PERIOD |
 151                     IEEE80211_HW_SPECTRUM_MGMT |
 152                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 153
 154         /*
 155          * Including the following line will crash some AP's.  This
 156          * workaround removes the stimulus which causes the crash until
 157          * the AP software can be fixed.
 158         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 159          */
 160
 161         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 162                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 163
 164         if (cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE)
 165                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 166                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 167
 168         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 169                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 170
 171         hw->sta_data_size = sizeof(struct iwl_station_priv);
 172         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 173
 174         for_each_context(priv, ctx) {
 175                 hw->wiphy->interface_modes |= ctx->interface_modes;
 176                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 177         }
 178
 179         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 180
 181         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 182                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 183                 hw->wiphy->n_iface_combinations =
 184                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 185         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 186                 hw->wiphy->iface_combinations =
 187                         iwlagn_iface_combinations_dualmode;
 188                 hw->wiphy->n_iface_combinations =
 189                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 190         }
 191
 192         hw->wiphy->max_remain_on_channel_duration = 1000;
 193
 194         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 195                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 196                             WIPHY_FLAG_IBSS_RSN;
 197
 198         if (nic(priv)->fw.ucode_wowlan.code.len &&
 199             device_can_wakeup(trans(priv)->dev)) {
 200                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 201                                           WIPHY_WOWLAN_DISCONNECT |
 202                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 203                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 204                 if (!iwlagn_mod_params.sw_crypto)
 205                         hw->wiphy->wowlan.flags |=
 206                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 207                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 208
 209                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 210                 hw->wiphy->wowlan.pattern_min_len =
 211                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 212                 hw->wiphy->wowlan.pattern_max_len =
 213                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 214         }
 215
 216         if (iwlagn_mod_params.power_save)
 217                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 218         else
 219                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 220
 221         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 222         /* we create the 802.11 header and a zero-length SSID element */
 223         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 224
 225         /* Default value; 4 EDCA QOS priorities */
 226         hw->queues = 4;
 227
 228         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 229
 230         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 231                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 232                         &priv->bands[IEEE80211_BAND_2GHZ];
 233         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 234                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 235                         &priv->bands[IEEE80211_BAND_5GHZ];
 236
 237         hw->wiphy->hw_version = trans(priv)->hw_id;
 238
 239         iwl_leds_init(priv);
 240
 241         ret = ieee80211_register_hw(priv->hw);
 242         if (ret) {
 243                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 244                 return ret;
 245         }
 246         priv->mac80211_registered = 1;
 247
 248         return 0;
 249 }
 250
 251 void iwlagn_mac_unregister(struct iwl_priv *priv)
 252 {
 253         if (!priv->mac80211_registered)
 254                 return;
 255         iwl_leds_exit(priv);
 256         ieee80211_unregister_hw(priv->hw);
 257         priv->mac80211_registered = 0;
 258 }
 259
 260 static int __iwl_up(struct iwl_priv *priv)
 261 {
 262         struct iwl_rxon_context *ctx;
 263         int ret;
 264
 265         lockdep_assert_held(&priv->shrd->mutex);
 266
 267         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 268                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 269                 return -EIO;
 270         }
 271
 272         for_each_context(priv, ctx) {
 273                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 274                 if (ret) {
 275                         iwl_dealloc_bcast_stations(priv);
 276                         return ret;
 277                 }
 278         }
 279
 280         ret = iwl_run_init_ucode(trans(priv));
 281         if (ret) {
 282                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 283                 goto error;
 284         }
 285
 286         ret = iwl_load_ucode_wait_alive(trans(priv), IWL_UCODE_REGULAR);
 287         if (ret) {
 288                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 289                 goto error;
 290         }
 291
 292         ret = iwl_alive_start(priv);
 293         if (ret)
 294                 goto error;
 295         return 0;
 296
 297  error:
 298         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 299         iwl_down(priv);
 300         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 301
 302         IWL_ERR(priv, "Unable to initialize device.\n");
 303         return ret;
 304 }
 305
 306 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 307 {
 308         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 309         int ret;
 310
 311         IWL_DEBUG_MAC80211(priv, "enter\n");
 312
 313         /* we should be verifying the device is ready to be opened */
 314         mutex_lock(&priv->shrd->mutex);
 315         ret = __iwl_up(priv);
 316         mutex_unlock(&priv->shrd->mutex);
 317         if (ret)
 318                 return ret;
 319
 320         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 321
 322         /* Now we should be done, and the READY bit should be set. */
 323         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 324                 ret = -EIO;
 325
 326         iwlagn_led_enable(priv);
 327
 328         priv->is_open = 1;
 329         IWL_DEBUG_MAC80211(priv, "leave\n");
 330         return 0;
 331 }
 332
 333 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 334 {
 335         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 336
 337         IWL_DEBUG_MAC80211(priv, "enter\n");
 338
 339         if (!priv->is_open)
 340                 return;
 341
 342         priv->is_open = 0;
 343
 344         mutex_lock(&priv->shrd->mutex);
 345         iwl_down(priv);
 346         mutex_unlock(&priv->shrd->mutex);
 347
 348         iwl_cancel_deferred_work(priv);
 349
 350         flush_workqueue(priv->workqueue);
 351
 352         /* User space software may expect getting rfkill changes
 353          * even if interface is down, trans->down will leave the RF
 354          * kill interrupt enabled
 355          */
 356         iwl_trans_stop_hw(trans(priv));
 357
 358         IWL_DEBUG_MAC80211(priv, "leave\n");
 359 }
 360
 361 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 362                                       struct ieee80211_vif *vif,
 363                                       struct cfg80211_gtk_rekey_data *data)
 364 {
 365         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 366
 367         if (iwlagn_mod_params.sw_crypto)
 368                 return;
 369
 370         IWL_DEBUG_MAC80211(priv, "enter\n");
 371         mutex_lock(&priv->shrd->mutex);
 372
 373         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 374                 goto out;
 375
 376         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 377         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 378         priv->replay_ctr =
 379                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 380         priv->have_rekey_data = true;
 381
 382  out:
 383         mutex_unlock(&priv->shrd->mutex);
 384         IWL_DEBUG_MAC80211(priv, "leave\n");
 385 }
 386
 387 #ifdef CONFIG_PM_SLEEP
 388
 389 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 390                               struct cfg80211_wowlan *wowlan)
 391 {
 392         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 393         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 394         int ret;
 395
 396         if (WARN_ON(!wowlan))
 397                 return -EINVAL;
 398
 399         IWL_DEBUG_MAC80211(priv, "enter\n");
 400         mutex_lock(&priv->shrd->mutex);
 401
 402         /* Don't attempt WoWLAN when not associated, tear down instead. */
 403         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 404             !iwl_is_associated_ctx(ctx)) {
 405                 ret = 1;
 406                 goto out;
 407         }
 408
 409         ret = iwlagn_suspend(priv, hw, wowlan);
 410         if (ret)
 411                 goto error;
 412
 413         device_set_wakeup_enable(trans(priv)->dev, true);
 414
 415         /* Now let the ucode operate on its own */
 416         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_SET,
 417                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 418
 419         goto out;
 420
 421  error:
 422         priv->shrd->wowlan = false;
 423         iwlagn_prepare_restart(priv);
 424         ieee80211_restart_hw(priv->hw);
 425  out:
 426         mutex_unlock(&priv->shrd->mutex);
 427         IWL_DEBUG_MAC80211(priv, "leave\n");
 428
 429         return ret;
 430 }
 431
 432 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 433 {
 434         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 435         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 436         struct ieee80211_vif *vif;
 437         unsigned long flags;
 438         u32 base, status = 0xffffffff;
 439         int ret = -EIO;
 440
 441         IWL_DEBUG_MAC80211(priv, "enter\n");
 442         mutex_lock(&priv->shrd->mutex);
 443
 444         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 445                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 446
 447         base = priv->shrd->device_pointers.error_event_table;
 448         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 449                 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
 450                 ret = iwl_grab_nic_access_silent(trans(priv));
 451                 if (ret == 0) {
 452                         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
 453                         status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 454                         iwl_release_nic_access(trans(priv));
 455                 }
 456                 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
 457
 458 #ifdef CONFIG_IWLWIFI_DEBUGFS
 459                 if (ret == 0) {
 460                         struct iwl_nic *nic = nic(priv);
 461                         if (!priv->wowlan_sram)
 462                                 priv->wowlan_sram =
 463                                         kzalloc(nic->fw.ucode_wowlan.data.len,
 464                                                 GFP_KERNEL);
 465
 466                         if (priv->wowlan_sram)
 467                                 _iwl_read_targ_mem_words(
 468                                         trans(priv), 0x800000,
 469                                         priv->wowlan_sram,
 470                                         nic->fw.ucode_wowlan.data.len / 4);
 471                 }
 472 #endif
 473         }
 474
 475         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 476         vif = ctx->vif;
 477
 478         priv->shrd->wowlan = false;
 479
 480         device_set_wakeup_enable(trans(priv)->dev, false);
 481
 482         iwlagn_prepare_restart(priv);
 483
 484         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 485         iwl_connection_init_rx_config(priv, ctx);
 486         iwlagn_set_rxon_chain(priv, ctx);
 487
 488         mutex_unlock(&priv->shrd->mutex);
 489         IWL_DEBUG_MAC80211(priv, "leave\n");
 490
 491         ieee80211_resume_disconnect(vif);
 492
 493         return 1;
 494 }
 495
 496 #endif
 497
 498 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 499 {
 500         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 501
 502         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 503                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 504
 505         if (iwlagn_tx_skb(priv, skb))
 506                 dev_kfree_skb_any(skb);
 507 }
 508
 509 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 510                                        struct ieee80211_vif *vif,
 511                                        struct ieee80211_key_conf *keyconf,
 512                                        struct ieee80211_sta *sta,
 513                                        u32 iv32, u16 *phase1key)
 514 {
 515         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 516
 517         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 518 }
 519
 520 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 521                               struct ieee80211_vif *vif,
 522                               struct ieee80211_sta *sta,
 523                               struct ieee80211_key_conf *key)
 524 {
 525         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 526         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 527         struct iwl_rxon_context *ctx = vif_priv->ctx;
 528         int ret;
 529         bool is_default_wep_key = false;
 530
 531         IWL_DEBUG_MAC80211(priv, "enter\n");
 532
 533         if (iwlagn_mod_params.sw_crypto) {
 534                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 535                 return -EOPNOTSUPP;
 536         }
 537
 538         switch (key->cipher) {
 539         case WLAN_CIPHER_SUITE_TKIP:
 540                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 541                 /* fall through */
 542         case WLAN_CIPHER_SUITE_CCMP:
 543                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 544                 break;
 545         default:
 546                 break;
 547         }
 548
 549         /*
 550          * We could program these keys into the hardware as well, but we
 551          * don't expect much multicast traffic in IBSS and having keys
 552          * for more stations is probably more useful.
 553          *
 554          * Mark key TX-only and return 0.
 555          */
 556         if (vif->type == NL80211_IFTYPE_ADHOC &&
 557             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 558                 key->hw_key_idx = WEP_INVALID_OFFSET;
 559                 return 0;
 560         }
 561
 562         /* If they key was TX-only, accept deletion */
 563         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 564                 return 0;
 565
 566         mutex_lock(&priv->shrd->mutex);
 567         iwl_scan_cancel_timeout(priv, 100);
 568
 569         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 570
 571         /*
 572          * If we are getting WEP group key and we didn't receive any key mapping
 573          * so far, we are in legacy wep mode (group key only), otherwise we are
 574          * in 1X mode.
 575          * In legacy wep mode, we use another host command to the uCode.
 576          */
 577         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 578              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 579                 if (cmd == SET_KEY)
 580                         is_default_wep_key = !ctx->key_mapping_keys;
 581                 else
 582                         is_default_wep_key =
 583                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 584         }
 585
 586
 587         switch (cmd) {
 588         case SET_KEY:
 589                 if (is_default_wep_key) {
 590                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 591                         break;
 592                 }
 593                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 594                 if (ret) {
 595                         /*
 596                          * can't add key for RX, but we don't need it
 597                          * in the device for TX so still return 0
 598                          */
 599                         ret = 0;
 600                         key->hw_key_idx = WEP_INVALID_OFFSET;
 601                 }
 602
 603                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 604                 break;
 605         case DISABLE_KEY:
 606                 if (is_default_wep_key)
 607                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 608                 else
 609                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 610
 611                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 612                 break;
 613         default:
 614                 ret = -EINVAL;
 615         }
 616
 617         mutex_unlock(&priv->shrd->mutex);
 618         IWL_DEBUG_MAC80211(priv, "leave\n");
 619
 620         return ret;
 621 }
 622
 623 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 624                                    struct ieee80211_vif *vif,
 625                                    enum ieee80211_ampdu_mlme_action action,
 626                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 627                                    u8 buf_size)
 628 {
 629         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 630         int ret = -EINVAL;
 631         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 632
 633         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 634                      sta->addr, tid);
 635
 636         if (!(cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE))
 637                 return -EACCES;
 638
 639         IWL_DEBUG_MAC80211(priv, "enter\n");
 640         mutex_lock(&priv->shrd->mutex);
 641
 642         switch (action) {
 643         case IEEE80211_AMPDU_RX_START:
 644                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 645                         break;
 646                 IWL_DEBUG_HT(priv, "start Rx\n");
 647                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 648                 break;
 649         case IEEE80211_AMPDU_RX_STOP:
 650                 IWL_DEBUG_HT(priv, "stop Rx\n");
 651                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 652                 break;
 653         case IEEE80211_AMPDU_TX_START:
 654                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 655                         break;
 656                 IWL_DEBUG_HT(priv, "start Tx\n");
 657                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 658                 break;
 659         case IEEE80211_AMPDU_TX_STOP:
 660                 IWL_DEBUG_HT(priv, "stop Tx\n");
 661                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 662                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 663                         priv->agg_tids_count--;
 664                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 665                                      priv->agg_tids_count);
 666                 }
 667                 if (!priv->agg_tids_count && cfg(priv)->ht_params &&
 668                     cfg(priv)->ht_params->use_rts_for_aggregation) {
 669                         /*
 670                          * switch off RTS/CTS if it was previously enabled
 671                          */
 672                         sta_priv->lq_sta.lq.general_params.flags &=
 673                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 674                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 675                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 676                 }
 677                 break;
 678         case IEEE80211_AMPDU_TX_OPERATIONAL:
 679                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 680                 break;
 681         }
 682         mutex_unlock(&priv->shrd->mutex);
 683         IWL_DEBUG_MAC80211(priv, "leave\n");
 684         return ret;
 685 }
 686
 687 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 688                               struct ieee80211_vif *vif,
 689                               struct ieee80211_sta *sta)
 690 {
 691         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 692         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 693         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 694         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 695         int ret;
 696         u8 sta_id;
 697
 698         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 699                         sta->addr);
 700         sta_priv->sta_id = IWL_INVALID_STATION;
 701
 702         atomic_set(&sta_priv->pending_frames, 0);
 703         if (vif->type == NL80211_IFTYPE_AP)
 704                 sta_priv->client = true;
 705
 706         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 707                                      is_ap, sta, &sta_id);
 708         if (ret) {
 709                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 710                         sta->addr, ret);
 711                 /* Should we return success if return code is EEXIST ? */
 712                 return ret;
 713         }
 714
 715         sta_priv->sta_id = sta_id;
 716
 717         return 0;
 718 }
 719
 720 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 721                                  struct ieee80211_vif *vif,
 722                                  struct ieee80211_sta *sta)
 723 {
 724         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 725         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 726         int ret;
 727
 728         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
 729                         sta->addr);
 730         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 731         if (ret)
 732                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
 733                         sta->addr);
 734         return ret;
 735 }
 736
 737 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 738                                 struct ieee80211_vif *vif,
 739                                 struct ieee80211_sta *sta,
 740                                 enum ieee80211_sta_state old_state,
 741                                 enum ieee80211_sta_state new_state)
 742 {
 743         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 744         enum {
 745                 NONE, ADD, REMOVE, RATE_INIT, ADD_RATE_INIT,
 746         } op = NONE;
 747         int ret;
 748
 749         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 750                            sta->addr, old_state, new_state);
 751
 752         mutex_lock(&priv->shrd->mutex);
 753         if (vif->type == NL80211_IFTYPE_STATION) {
 754                 if (old_state == IEEE80211_STA_NOTEXIST &&
 755                     new_state == IEEE80211_STA_NONE)
 756                         op = ADD;
 757                 else if (old_state == IEEE80211_STA_NONE &&
 758                          new_state == IEEE80211_STA_NOTEXIST)
 759                         op = REMOVE;
 760                 else if (old_state == IEEE80211_STA_AUTH &&
 761                          new_state == IEEE80211_STA_ASSOC)
 762                         op = RATE_INIT;
 763         } else {
 764                 if (old_state == IEEE80211_STA_AUTH &&
 765                     new_state == IEEE80211_STA_ASSOC)
 766                         op = ADD_RATE_INIT;
 767                 else if (old_state == IEEE80211_STA_ASSOC &&
 768                          new_state == IEEE80211_STA_AUTH)
 769                         op = REMOVE;
 770         }
 771
 772         switch (op) {
 773         case ADD:
 774                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 775                 break;
 776         case REMOVE:
 777                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 778                 break;
 779         case ADD_RATE_INIT:
 780                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 781                 if (ret)
 782                         break;
 783                 /* fall through */
 784         case RATE_INIT:
 785                 /* Initialize rate scaling */
 786                 IWL_DEBUG_INFO(priv,
 787                                "Initializing rate scaling for station %pM\n",
 788                                sta->addr);
 789                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 790                 ret = 0;
 791                 break;
 792         default:
 793                 ret = 0;
 794                 break;
 795         }
 796
 797         /*
 798          * mac80211 might WARN if we fail, but due the way we
 799          * (badly) handle hard rfkill, we might fail here
 800          */
 801         if (iwl_is_rfkill(priv->shrd))
 802                 ret = 0;
 803
 804         mutex_unlock(&priv->shrd->mutex);
 805         IWL_DEBUG_MAC80211(priv, "leave\n");
 806
 807         return ret;
 808 }
 809
 810 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 811                                 struct ieee80211_channel_switch *ch_switch)
 812 {
 813         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 814         const struct iwl_channel_info *ch_info;
 815         struct ieee80211_conf *conf = &hw->conf;
 816         struct ieee80211_channel *channel = ch_switch->channel;
 817         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 818         /*
 819          * MULTI-FIXME
 820          * When we add support for multiple interfaces, we need to
 821          * revisit this. The channel switch command in the device
 822          * only affects the BSS context, but what does that really
 823          * mean? And what if we get a CSA on the second interface?
 824          * This needs a lot of work.
 825          */
 826         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 827         u16 ch;
 828
 829         IWL_DEBUG_MAC80211(priv, "enter\n");
 830
 831         mutex_lock(&priv->shrd->mutex);
 832
 833         if (iwl_is_rfkill(priv->shrd))
 834                 goto out;
 835
 836         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 837             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 838             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 839                 goto out;
 840
 841         if (!iwl_is_associated_ctx(ctx))
 842                 goto out;
 843
 844         if (!cfg(priv)->lib->set_channel_switch)
 845                 goto out;
 846
 847         ch = channel->hw_value;
 848         if (le16_to_cpu(ctx->active.channel) == ch)
 849                 goto out;
 850
 851         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 852         if (!is_channel_valid(ch_info)) {
 853                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 854                 goto out;
 855         }
 856
 857         priv->current_ht_config.smps = conf->smps_mode;
 858
 859         /* Configure HT40 channels */
 860         ctx->ht.enabled = conf_is_ht(conf);
 861         if (ctx->ht.enabled)
 862                 iwlagn_config_ht40(conf, ctx);
 863         else
 864                 ctx->ht.is_40mhz = false;
 865
 866         if ((le16_to_cpu(ctx->staging.channel) != ch))
 867                 ctx->staging.flags = 0;
 868
 869         iwl_set_rxon_channel(priv, channel, ctx);
 870         iwl_set_rxon_ht(priv, ht_conf);
 871         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 872
 873         iwl_set_rate(priv);
 874         /*
 875          * at this point, staging_rxon has the
 876          * configuration for channel switch
 877          */
 878         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 879         priv->switch_channel = cpu_to_le16(ch);
 880         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 881                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 882                 priv->switch_channel = 0;
 883                 ieee80211_chswitch_done(ctx->vif, false);
 884         }
 885
 886 out:
 887         mutex_unlock(&priv->shrd->mutex);
 888         IWL_DEBUG_MAC80211(priv, "leave\n");
 889 }
 890
 891 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 892                                     unsigned int changed_flags,
 893                                     unsigned int *total_flags,
 894                                     u64 multicast)
 895 {
 896         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 897         __le32 filter_or = 0, filter_nand = 0;
 898         struct iwl_rxon_context *ctx;
 899
 900 #define CHK(test, flag) do { \
 901         if (*total_flags & (test))              \
 902                 filter_or |= (flag);            \
 903         else                                    \
 904                 filter_nand |= (flag);          \
 905         } while (0)
 906
 907         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 908                         changed_flags, *total_flags);
 909
 910         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 911         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 912         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 913         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 914
 915 #undef CHK
 916
 917         mutex_lock(&priv->shrd->mutex);
 918
 919         for_each_context(priv, ctx) {
 920                 ctx->staging.filter_flags &= ~filter_nand;
 921                 ctx->staging.filter_flags |= filter_or;
 922
 923                 /*
 924                  * Not committing directly because hardware can perform a scan,
 925                  * but we'll eventually commit the filter flags change anyway.
 926                  */
 927         }
 928
 929         mutex_unlock(&priv->shrd->mutex);
 930
 931         /*
 932          * Receiving all multicast frames is always enabled by the
 933          * default flags setup in iwl_connection_init_rx_config()
 934          * since we currently do not support programming multicast
 935          * filters into the device.
 936          */
 937         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 938                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 939 }
 940
 941 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 942 {
 943         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 944
 945         mutex_lock(&priv->shrd->mutex);
 946         IWL_DEBUG_MAC80211(priv, "enter\n");
 947
 948         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 949                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 950                 goto done;
 951         }
 952         if (iwl_is_rfkill(priv->shrd)) {
 953                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 954                 goto done;
 955         }
 956
 957         /*
 958          * mac80211 will not push any more frames for transmit
 959          * until the flush is completed
 960          */
 961         if (drop) {
 962                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 963                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 964                         IWL_ERR(priv, "flush request fail\n");
 965                         goto done;
 966                 }
 967         }
 968         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 969         iwl_trans_wait_tx_queue_empty(trans(priv));
 970 done:
 971         mutex_unlock(&priv->shrd->mutex);
 972         IWL_DEBUG_MAC80211(priv, "leave\n");
 973 }
 974
 975 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 976                                      struct ieee80211_channel *channel,
 977                                      enum nl80211_channel_type channel_type,
 978                                      int duration)
 979 {
 980         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 981         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 982         int err = 0;
 983
 984         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 985                 return -EOPNOTSUPP;
 986
 987         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 988                 return -EOPNOTSUPP;
 989
 990         IWL_DEBUG_MAC80211(priv, "enter\n");
 991         mutex_lock(&priv->shrd->mutex);
 992
 993         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 994                 err = -EBUSY;
 995                 goto out;
 996         }
 997
 998         priv->hw_roc_channel = channel;
 999         priv->hw_roc_chantype = channel_type;
1000         /* convert from ms to TU */
1001         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1002         priv->hw_roc_start_notified = false;
1003         cancel_delayed_work(&priv->hw_roc_disable_work);
1004
1005         if (!ctx->is_active) {
1006                 static const struct iwl_qos_info default_qos_data = {
1007                         .def_qos_parm = {
1008                                 .ac[0] = {
1009                                         .cw_min = cpu_to_le16(3),
1010                                         .cw_max = cpu_to_le16(7),
1011                                         .aifsn = 2,
1012                                         .edca_txop = cpu_to_le16(1504),
1013                                 },
1014                                 .ac[1] = {
1015                                         .cw_min = cpu_to_le16(7),
1016                                         .cw_max = cpu_to_le16(15),
1017                                         .aifsn = 2,
1018                                         .edca_txop = cpu_to_le16(3008),
1019                                 },
1020                                 .ac[2] = {
1021                                         .cw_min = cpu_to_le16(15),
1022                                         .cw_max = cpu_to_le16(1023),
1023                                         .aifsn = 3,
1024                                 },
1025                                 .ac[3] = {
1026                                         .cw_min = cpu_to_le16(15),
1027                                         .cw_max = cpu_to_le16(1023),
1028                                         .aifsn = 7,
1029                                 },
1030                         },
1031                 };
1032
1033                 ctx->is_active = true;
1034                 ctx->qos_data = default_qos_data;
1035                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1036                 memcpy(ctx->staging.node_addr,
1037                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1038                        ETH_ALEN);
1039                 memcpy(ctx->staging.bssid_addr,
1040                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1041                        ETH_ALEN);
1042                 err = iwlagn_commit_rxon(priv, ctx);
1043                 if (err)
1044                         goto out;
1045                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1046                                              RXON_FILTER_PROMISC_MSK |
1047                                              RXON_FILTER_CTL2HOST_MSK;
1048
1049                 err = iwlagn_commit_rxon(priv, ctx);
1050                 if (err) {
1051                         iwlagn_disable_roc(priv);
1052                         goto out;
1053                 }
1054                 priv->hw_roc_setup = true;
1055         }
1056
1057         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1058         if (err)
1059                 iwlagn_disable_roc(priv);
1060
1061  out:
1062         mutex_unlock(&priv->shrd->mutex);
1063         IWL_DEBUG_MAC80211(priv, "leave\n");
1064
1065         return err;
1066 }
1067
1068 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1069 {
1070         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1071
1072         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1073                 return -EOPNOTSUPP;
1074
1075         IWL_DEBUG_MAC80211(priv, "enter\n");
1076         mutex_lock(&priv->shrd->mutex);
1077         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1078         iwlagn_disable_roc(priv);
1079         mutex_unlock(&priv->shrd->mutex);
1080         IWL_DEBUG_MAC80211(priv, "leave\n");
1081
1082         return 0;
1083 }
1084
1085 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1086                            enum ieee80211_rssi_event rssi_event)
1087 {
1088         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1089
1090         IWL_DEBUG_MAC80211(priv, "enter\n");
1091         mutex_lock(&priv->shrd->mutex);
1092
1093         if (cfg(priv)->bt_params &&
1094                         cfg(priv)->bt_params->advanced_bt_coexist) {
1095                 if (rssi_event == RSSI_EVENT_LOW)
1096                         priv->bt_enable_pspoll = true;
1097                 else if (rssi_event == RSSI_EVENT_HIGH)
1098                         priv->bt_enable_pspoll = false;
1099
1100                 iwlagn_send_advance_bt_config(priv);
1101         } else {
1102                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1103                                 "ignoring RSSI callback\n");
1104         }
1105
1106         mutex_unlock(&priv->shrd->mutex);
1107         IWL_DEBUG_MAC80211(priv, "leave\n");
1108 }
1109
1110 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1111                            struct ieee80211_sta *sta, bool set)
1112 {
1113         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1114
1115         queue_work(priv->workqueue, &priv->beacon_update);
1116
1117         return 0;
1118 }
1119
1120 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1121                     struct ieee80211_vif *vif, u16 queue,
1122                     const struct ieee80211_tx_queue_params *params)
1123 {
1124         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1125         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1126         struct iwl_rxon_context *ctx = vif_priv->ctx;
1127         int q;
1128
1129         if (WARN_ON(!ctx))
1130                 return -EINVAL;
1131
1132         IWL_DEBUG_MAC80211(priv, "enter\n");
1133
1134         if (!iwl_is_ready_rf(priv->shrd)) {
1135                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1136                 return -EIO;
1137         }
1138
1139         if (queue >= AC_NUM) {
1140                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1141                 return 0;
1142         }
1143
1144         q = AC_NUM - 1 - queue;
1145
1146         mutex_lock(&priv->shrd->mutex);
1147
1148         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1149                 cpu_to_le16(params->cw_min);
1150         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1151                 cpu_to_le16(params->cw_max);
1152         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1153         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1154                         cpu_to_le16((params->txop * 32));
1155
1156         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1157
1158         mutex_unlock(&priv->shrd->mutex);
1159
1160         IWL_DEBUG_MAC80211(priv, "leave\n");
1161         return 0;
1162 }
1163
1164 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1165 {
1166         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1167
1168         return priv->ibss_manager == IWL_IBSS_MANAGER;
1169 }
1170
1171 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1172 {
1173         iwl_connection_init_rx_config(priv, ctx);
1174
1175         iwlagn_set_rxon_chain(priv, ctx);
1176
1177         return iwlagn_commit_rxon(priv, ctx);
1178 }
1179
1180 static int iwl_setup_interface(struct iwl_priv *priv,
1181                                struct iwl_rxon_context *ctx)
1182 {
1183         struct ieee80211_vif *vif = ctx->vif;
1184         int err;
1185
1186         lockdep_assert_held(&priv->shrd->mutex);
1187
1188         /*
1189          * This variable will be correct only when there's just
1190          * a single context, but all code using it is for hardware
1191          * that supports only one context.
1192          */
1193         priv->iw_mode = vif->type;
1194
1195         ctx->is_active = true;
1196
1197         err = iwl_set_mode(priv, ctx);
1198         if (err) {
1199                 if (!ctx->always_active)
1200                         ctx->is_active = false;
1201                 return err;
1202         }
1203
1204         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1205             vif->type == NL80211_IFTYPE_ADHOC) {
1206                 /*
1207                  * pretend to have high BT traffic as long as we
1208                  * are operating in IBSS mode, as this will cause
1209                  * the rate scaling etc. to behave as intended.
1210                  */
1211                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1212         }
1213
1214         return 0;
1215 }
1216
1217 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1218                              struct ieee80211_vif *vif)
1219 {
1220         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1221         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1222         struct iwl_rxon_context *tmp, *ctx = NULL;
1223         int err;
1224         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1225
1226         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1227                            viftype, vif->addr);
1228
1229         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1230
1231         mutex_lock(&priv->shrd->mutex);
1232
1233         iwlagn_disable_roc(priv);
1234
1235         if (!iwl_is_ready_rf(priv->shrd)) {
1236                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1237                 err = -EINVAL;
1238                 goto out;
1239         }
1240
1241         for_each_context(priv, tmp) {
1242                 u32 possible_modes =
1243                         tmp->interface_modes | tmp->exclusive_interface_modes;
1244
1245                 if (tmp->vif) {
1246                         /* check if this busy context is exclusive */
1247                         if (tmp->exclusive_interface_modes &
1248                                                 BIT(tmp->vif->type)) {
1249                                 err = -EINVAL;
1250                                 goto out;
1251                         }
1252                         continue;
1253                 }
1254
1255                 if (!(possible_modes & BIT(viftype)))
1256                         continue;
1257
1258                 /* have maybe usable context w/o interface */
1259                 ctx = tmp;
1260                 break;
1261         }
1262
1263         if (!ctx) {
1264                 err = -EOPNOTSUPP;
1265                 goto out;
1266         }
1267
1268         vif_priv->ctx = ctx;
1269         ctx->vif = vif;
1270
1271         err = iwl_setup_interface(priv, ctx);
1272         if (!err)
1273                 goto out;
1274
1275         ctx->vif = NULL;
1276         priv->iw_mode = NL80211_IFTYPE_STATION;
1277  out:
1278         mutex_unlock(&priv->shrd->mutex);
1279
1280         IWL_DEBUG_MAC80211(priv, "leave\n");
1281         return err;
1282 }
1283
1284 static void iwl_teardown_interface(struct iwl_priv *priv,
1285                                    struct ieee80211_vif *vif,
1286                                    bool mode_change)
1287 {
1288         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1289
1290         lockdep_assert_held(&priv->shrd->mutex);
1291
1292         if (priv->scan_vif == vif) {
1293                 iwl_scan_cancel_timeout(priv, 200);
1294                 iwl_force_scan_end(priv);
1295         }
1296
1297         if (!mode_change) {
1298                 iwl_set_mode(priv, ctx);
1299                 if (!ctx->always_active)
1300                         ctx->is_active = false;
1301         }
1302
1303         /*
1304          * When removing the IBSS interface, overwrite the
1305          * BT traffic load with the stored one from the last
1306          * notification, if any. If this is a device that
1307          * doesn't implement this, this has no effect since
1308          * both values are the same and zero.
1309          */
1310         if (vif->type == NL80211_IFTYPE_ADHOC)
1311                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1312 }
1313
1314 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1315                               struct ieee80211_vif *vif)
1316 {
1317         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1318         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1319
1320         IWL_DEBUG_MAC80211(priv, "enter\n");
1321
1322         mutex_lock(&priv->shrd->mutex);
1323
1324         if (WARN_ON(ctx->vif != vif)) {
1325                 struct iwl_rxon_context *tmp;
1326                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1327                 for_each_context(priv, tmp)
1328                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1329                                 tmp->ctxid, tmp, tmp->vif);
1330         }
1331         ctx->vif = NULL;
1332
1333         iwl_teardown_interface(priv, vif, false);
1334
1335         mutex_unlock(&priv->shrd->mutex);
1336
1337         IWL_DEBUG_MAC80211(priv, "leave\n");
1338
1339 }
1340
1341 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1342                                 struct ieee80211_vif *vif,
1343                                 enum nl80211_iftype newtype, bool newp2p)
1344 {
1345         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1346         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1347         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1348         struct iwl_rxon_context *tmp;
1349         enum nl80211_iftype newviftype = newtype;
1350         u32 interface_modes;
1351         int err;
1352
1353         IWL_DEBUG_MAC80211(priv, "enter\n");
1354
1355         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1356
1357         mutex_lock(&priv->shrd->mutex);
1358
1359         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1360                 /*
1361                  * Huh? But wait ... this can maybe happen when
1362                  * we're in the middle of a firmware restart!
1363                  */
1364                 err = -EBUSY;
1365                 goto out;
1366         }
1367
1368         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1369
1370         if (!(interface_modes & BIT(newtype))) {
1371                 err = -EBUSY;
1372                 goto out;
1373         }
1374
1375         /*
1376          * Refuse a change that should be done by moving from the PAN
1377          * context to the BSS context instead, if the BSS context is
1378          * available and can support the new interface type.
1379          */
1380         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1381             (bss_ctx->interface_modes & BIT(newtype) ||
1382              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1383                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1384                 err = -EBUSY;
1385                 goto out;
1386         }
1387
1388         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1389                 for_each_context(priv, tmp) {
1390                         if (ctx == tmp)
1391                                 continue;
1392
1393                         if (!tmp->vif)
1394                                 continue;
1395
1396                         /*
1397                          * The current mode switch would be exclusive, but
1398                          * another context is active ... refuse the switch.
1399                          */
1400                         err = -EBUSY;
1401                         goto out;
1402                 }
1403         }
1404
1405         /* success */
1406         iwl_teardown_interface(priv, vif, true);
1407         vif->type = newviftype;
1408         vif->p2p = newp2p;
1409         err = iwl_setup_interface(priv, ctx);
1410         WARN_ON(err);
1411         /*
1412          * We've switched internally, but submitting to the
1413          * device may have failed for some reason. Mask this
1414          * error, because otherwise mac80211 will not switch
1415          * (and set the interface type back) and we'll be
1416          * out of sync with it.
1417          */
1418         err = 0;
1419
1420  out:
1421         mutex_unlock(&priv->shrd->mutex);
1422         IWL_DEBUG_MAC80211(priv, "leave\n");
1423
1424         return err;
1425 }
1426
1427 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1428                     struct ieee80211_vif *vif,
1429                     struct cfg80211_scan_request *req)
1430 {
1431         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1432         int ret;
1433
1434         IWL_DEBUG_MAC80211(priv, "enter\n");
1435
1436         if (req->n_channels == 0)
1437                 return -EINVAL;
1438
1439         mutex_lock(&priv->shrd->mutex);
1440
1441         /*
1442          * If an internal scan is in progress, just set
1443          * up the scan_request as per above.
1444          */
1445         if (priv->scan_type != IWL_SCAN_NORMAL) {
1446                 IWL_DEBUG_SCAN(priv,
1447                                "SCAN request during internal scan - defer\n");
1448                 priv->scan_request = req;
1449                 priv->scan_vif = vif;
1450                 ret = 0;
1451         } else {
1452                 priv->scan_request = req;
1453                 priv->scan_vif = vif;
1454                 /*
1455                  * mac80211 will only ask for one band at a time
1456                  * so using channels[0] here is ok
1457                  */
1458                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1459                                         req->channels[0]->band);
1460                 if (ret) {
1461                         priv->scan_request = NULL;
1462                         priv->scan_vif = NULL;
1463                 }
1464         }
1465
1466         IWL_DEBUG_MAC80211(priv, "leave\n");
1467
1468         mutex_unlock(&priv->shrd->mutex);
1469
1470         return ret;
1471 }
1472
1473 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1474 {
1475         struct iwl_addsta_cmd cmd = {
1476                 .mode = STA_CONTROL_MODIFY_MSK,
1477                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1478                 .sta.sta_id = sta_id,
1479         };
1480
1481         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1482 }
1483
1484 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1485                            struct ieee80211_vif *vif,
1486                            enum sta_notify_cmd cmd,
1487                            struct ieee80211_sta *sta)
1488 {
1489         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1490         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1491         int sta_id;
1492
1493         IWL_DEBUG_MAC80211(priv, "enter\n");
1494
1495         switch (cmd) {
1496         case STA_NOTIFY_SLEEP:
1497                 WARN_ON(!sta_priv->client);
1498                 sta_priv->asleep = true;
1499                 if (atomic_read(&sta_priv->pending_frames) > 0)
1500                         ieee80211_sta_block_awake(hw, sta, true);
1501                 break;
1502         case STA_NOTIFY_AWAKE:
1503                 WARN_ON(!sta_priv->client);
1504                 if (!sta_priv->asleep)
1505                         break;
1506                 sta_priv->asleep = false;
1507                 sta_id = iwl_sta_id(sta);
1508                 if (sta_id != IWL_INVALID_STATION)
1509                         iwl_sta_modify_ps_wake(priv, sta_id);
1510                 break;
1511         default:
1512                 break;
1513         }
1514         IWL_DEBUG_MAC80211(priv, "leave\n");
1515 }
1516
1517 struct ieee80211_ops iwlagn_hw_ops = {
1518         .tx = iwlagn_mac_tx,
1519         .start = iwlagn_mac_start,
1520         .stop = iwlagn_mac_stop,
1521 #ifdef CONFIG_PM_SLEEP
1522         .suspend = iwlagn_mac_suspend,
1523         .resume = iwlagn_mac_resume,
1524 #endif
1525         .add_interface = iwlagn_mac_add_interface,
1526         .remove_interface = iwlagn_mac_remove_interface,
1527         .change_interface = iwlagn_mac_change_interface,
1528         .config = iwlagn_mac_config,
1529         .configure_filter = iwlagn_configure_filter,
1530         .set_key = iwlagn_mac_set_key,
1531         .update_tkip_key = iwlagn_mac_update_tkip_key,
1532         .set_rekey_data = iwlagn_mac_set_rekey_data,
1533         .conf_tx = iwlagn_mac_conf_tx,
1534         .bss_info_changed = iwlagn_bss_info_changed,
1535         .ampdu_action = iwlagn_mac_ampdu_action,
1536         .hw_scan = iwlagn_mac_hw_scan,
1537         .sta_notify = iwlagn_mac_sta_notify,
1538         .sta_state = iwlagn_mac_sta_state,
1539         .channel_switch = iwlagn_mac_channel_switch,
1540         .flush = iwlagn_mac_flush,
1541         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1542         .remain_on_channel = iwlagn_mac_remain_on_channel,
1543         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1544         .rssi_callback = iwlagn_mac_rssi_callback,
1545         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1546         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1547         .set_tim = iwlagn_mac_set_tim,
1548 };
1549
1550 /* This function both allocates and initializes hw and priv. */
1551 struct ieee80211_hw *iwl_alloc_all(void)
1552 {
1553         struct iwl_priv *priv;
1554         struct iwl_op_mode *op_mode;
1555         /* mac80211 allocates memory for this device instance, including
1556          *   space for this driver's private structure */
1557         struct ieee80211_hw *hw;
1558
1559         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1560                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1561         if (!hw)
1562                 goto out;
1563
1564         op_mode = hw->priv;
1565         priv = IWL_OP_MODE_GET_DVM(op_mode);
1566         priv->hw = hw;
1567
1568 out:
1569         return hw;
1570 }