drivers/net/wireless/iwlwifi/iwl-mac80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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/firmware.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/if_arp.h>
  41
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  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-bus.h"
  55 #include "iwl-trans.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 iwlagn_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 (trans(priv)->ucode_wowlan.code.len &&
 199             device_can_wakeup(bus(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         iwl_leds_init(priv);
 238
 239         ret = ieee80211_register_hw(priv->hw);
 240         if (ret) {
 241                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 242                 return ret;
 243         }
 244         priv->mac80211_registered = 1;
 245
 246         return 0;
 247 }
 248
 249 void iwlagn_mac_unregister(struct iwl_priv *priv)
 250 {
 251         if (!priv->mac80211_registered)
 252                 return;
 253         iwl_leds_exit(priv);
 254         ieee80211_unregister_hw(priv->hw);
 255         priv->mac80211_registered = 0;
 256 }
 257
 258 static int __iwl_up(struct iwl_priv *priv)
 259 {
 260         struct iwl_rxon_context *ctx;
 261         int ret;
 262
 263         lockdep_assert_held(&priv->shrd->mutex);
 264
 265         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 266                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 267                 return -EIO;
 268         }
 269
 270         for_each_context(priv, ctx) {
 271                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 272                 if (ret) {
 273                         iwl_dealloc_bcast_stations(priv);
 274                         return ret;
 275                 }
 276         }
 277
 278         ret = iwl_run_init_ucode(trans(priv));
 279         if (ret) {
 280                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 281                 goto error;
 282         }
 283
 284         ret = iwl_load_ucode_wait_alive(trans(priv), IWL_UCODE_REGULAR);
 285         if (ret) {
 286                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 287                 goto error;
 288         }
 289
 290         ret = iwl_alive_start(priv);
 291         if (ret)
 292                 goto error;
 293         return 0;
 294
 295  error:
 296         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 297         __iwl_down(priv);
 298         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 299
 300         IWL_ERR(priv, "Unable to initialize device.\n");
 301         return ret;
 302 }
 303
 304 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 305 {
 306         struct iwl_priv *priv = hw->priv;
 307         int ret;
 308
 309         IWL_DEBUG_MAC80211(priv, "enter\n");
 310
 311         /* we should be verifying the device is ready to be opened */
 312         mutex_lock(&priv->shrd->mutex);
 313         ret = __iwl_up(priv);
 314         mutex_unlock(&priv->shrd->mutex);
 315         if (ret)
 316                 return ret;
 317
 318         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 319
 320         /* Now we should be done, and the READY bit should be set. */
 321         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 322                 ret = -EIO;
 323
 324         iwlagn_led_enable(priv);
 325
 326         priv->is_open = 1;
 327         IWL_DEBUG_MAC80211(priv, "leave\n");
 328         return 0;
 329 }
 330
 331 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 332 {
 333         struct iwl_priv *priv = hw->priv;
 334
 335         IWL_DEBUG_MAC80211(priv, "enter\n");
 336
 337         if (!priv->is_open)
 338                 return;
 339
 340         priv->is_open = 0;
 341
 342         iwl_down(priv);
 343
 344         flush_workqueue(priv->shrd->workqueue);
 345
 346         /* User space software may expect getting rfkill changes
 347          * even if interface is down */
 348         iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
 349         iwl_enable_rfkill_int(priv);
 350
 351         IWL_DEBUG_MAC80211(priv, "leave\n");
 352 }
 353
 354 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 355                                       struct ieee80211_vif *vif,
 356                                       struct cfg80211_gtk_rekey_data *data)
 357 {
 358         struct iwl_priv *priv = hw->priv;
 359
 360         if (iwlagn_mod_params.sw_crypto)
 361                 return;
 362
 363         IWL_DEBUG_MAC80211(priv, "enter\n");
 364         mutex_lock(&priv->shrd->mutex);
 365
 366         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 367                 goto out;
 368
 369         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 370         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 371         priv->replay_ctr =
 372                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 373         priv->have_rekey_data = true;
 374
 375  out:
 376         mutex_unlock(&priv->shrd->mutex);
 377         IWL_DEBUG_MAC80211(priv, "leave\n");
 378 }
 379
 380 #ifdef CONFIG_PM_SLEEP
 381
 382 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 383                               struct cfg80211_wowlan *wowlan)
 384 {
 385         struct iwl_priv *priv = hw->priv;
 386         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 387         int ret;
 388
 389         if (WARN_ON(!wowlan))
 390                 return -EINVAL;
 391
 392         IWL_DEBUG_MAC80211(priv, "enter\n");
 393         mutex_lock(&priv->shrd->mutex);
 394
 395         /* Don't attempt WoWLAN when not associated, tear down instead. */
 396         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 397             !iwl_is_associated_ctx(ctx)) {
 398                 ret = 1;
 399                 goto out;
 400         }
 401
 402         ret = iwlagn_suspend(priv, hw, wowlan);
 403         if (ret)
 404                 goto error;
 405
 406         device_set_wakeup_enable(bus(priv)->dev, true);
 407
 408         /* Now let the ucode operate on its own */
 409         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 410                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 411
 412         goto out;
 413
 414  error:
 415         priv->shrd->wowlan = false;
 416         iwlagn_prepare_restart(priv);
 417         ieee80211_restart_hw(priv->hw);
 418  out:
 419         mutex_unlock(&priv->shrd->mutex);
 420         IWL_DEBUG_MAC80211(priv, "leave\n");
 421
 422         return ret;
 423 }
 424
 425 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 426 {
 427         struct iwl_priv *priv = hw->priv;
 428         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 429         struct ieee80211_vif *vif;
 430         unsigned long flags;
 431         u32 base, status = 0xffffffff;
 432         int ret = -EIO;
 433
 434         IWL_DEBUG_MAC80211(priv, "enter\n");
 435         mutex_lock(&priv->shrd->mutex);
 436
 437         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 438                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 439
 440         base = priv->shrd->device_pointers.error_event_table;
 441         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 442                 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
 443                 ret = iwl_grab_nic_access_silent(bus(priv));
 444                 if (ret == 0) {
 445                         iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
 446                         status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
 447                         iwl_release_nic_access(bus(priv));
 448                 }
 449                 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
 450
 451 #ifdef CONFIG_IWLWIFI_DEBUGFS
 452                 if (ret == 0) {
 453                         struct iwl_trans *trans = trans(priv);
 454                         if (!priv->wowlan_sram)
 455                                 priv->wowlan_sram =
 456                                         kzalloc(trans->ucode_wowlan.data.len,
 457                                                 GFP_KERNEL);
 458
 459                         if (priv->wowlan_sram)
 460                                 _iwl_read_targ_mem_words(
 461                                         bus(priv), 0x800000, priv->wowlan_sram,
 462                                         trans->ucode_wowlan.data.len / 4);
 463                 }
 464 #endif
 465         }
 466
 467         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 468         vif = ctx->vif;
 469
 470         priv->shrd->wowlan = false;
 471
 472         device_set_wakeup_enable(bus(priv)->dev, false);
 473
 474         iwlagn_prepare_restart(priv);
 475
 476         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 477         iwl_connection_init_rx_config(priv, ctx);
 478         iwlagn_set_rxon_chain(priv, ctx);
 479
 480         mutex_unlock(&priv->shrd->mutex);
 481         IWL_DEBUG_MAC80211(priv, "leave\n");
 482
 483         ieee80211_resume_disconnect(vif);
 484
 485         return 1;
 486 }
 487
 488 #endif
 489
 490 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 491 {
 492         struct iwl_priv *priv = hw->priv;
 493
 494         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 495                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 496
 497         if (iwlagn_tx_skb(priv, skb))
 498                 dev_kfree_skb_any(skb);
 499 }
 500
 501 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 502                                        struct ieee80211_vif *vif,
 503                                        struct ieee80211_key_conf *keyconf,
 504                                        struct ieee80211_sta *sta,
 505                                        u32 iv32, u16 *phase1key)
 506 {
 507         struct iwl_priv *priv = hw->priv;
 508
 509         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 510 }
 511
 512 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 513                               struct ieee80211_vif *vif,
 514                               struct ieee80211_sta *sta,
 515                               struct ieee80211_key_conf *key)
 516 {
 517         struct iwl_priv *priv = hw->priv;
 518         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 519         struct iwl_rxon_context *ctx = vif_priv->ctx;
 520         int ret;
 521         bool is_default_wep_key = false;
 522
 523         IWL_DEBUG_MAC80211(priv, "enter\n");
 524
 525         if (iwlagn_mod_params.sw_crypto) {
 526                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 527                 return -EOPNOTSUPP;
 528         }
 529
 530         switch (key->cipher) {
 531         case WLAN_CIPHER_SUITE_TKIP:
 532                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 533                 /* fall through */
 534         case WLAN_CIPHER_SUITE_CCMP:
 535                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 536                 break;
 537         default:
 538                 break;
 539         }
 540
 541         /*
 542          * We could program these keys into the hardware as well, but we
 543          * don't expect much multicast traffic in IBSS and having keys
 544          * for more stations is probably more useful.
 545          *
 546          * Mark key TX-only and return 0.
 547          */
 548         if (vif->type == NL80211_IFTYPE_ADHOC &&
 549             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 550                 key->hw_key_idx = WEP_INVALID_OFFSET;
 551                 return 0;
 552         }
 553
 554         /* If they key was TX-only, accept deletion */
 555         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 556                 return 0;
 557
 558         mutex_lock(&priv->shrd->mutex);
 559         iwl_scan_cancel_timeout(priv, 100);
 560
 561         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 562
 563         /*
 564          * If we are getting WEP group key and we didn't receive any key mapping
 565          * so far, we are in legacy wep mode (group key only), otherwise we are
 566          * in 1X mode.
 567          * In legacy wep mode, we use another host command to the uCode.
 568          */
 569         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 570              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 571                 if (cmd == SET_KEY)
 572                         is_default_wep_key = !ctx->key_mapping_keys;
 573                 else
 574                         is_default_wep_key =
 575                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 576         }
 577
 578
 579         switch (cmd) {
 580         case SET_KEY:
 581                 if (is_default_wep_key) {
 582                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 583                         break;
 584                 }
 585                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 586                 if (ret) {
 587                         /*
 588                          * can't add key for RX, but we don't need it
 589                          * in the device for TX so still return 0
 590                          */
 591                         ret = 0;
 592                         key->hw_key_idx = WEP_INVALID_OFFSET;
 593                 }
 594
 595                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 596                 break;
 597         case DISABLE_KEY:
 598                 if (is_default_wep_key)
 599                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 600                 else
 601                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 602
 603                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 604                 break;
 605         default:
 606                 ret = -EINVAL;
 607         }
 608
 609         mutex_unlock(&priv->shrd->mutex);
 610         IWL_DEBUG_MAC80211(priv, "leave\n");
 611
 612         return ret;
 613 }
 614
 615 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 616                                    struct ieee80211_vif *vif,
 617                                    enum ieee80211_ampdu_mlme_action action,
 618                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 619                                    u8 buf_size)
 620 {
 621         struct iwl_priv *priv = hw->priv;
 622         int ret = -EINVAL;
 623         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 624
 625         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 626                      sta->addr, tid);
 627
 628         if (!(cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE))
 629                 return -EACCES;
 630
 631         IWL_DEBUG_MAC80211(priv, "enter\n");
 632         mutex_lock(&priv->shrd->mutex);
 633
 634         switch (action) {
 635         case IEEE80211_AMPDU_RX_START:
 636                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 637                         break;
 638                 IWL_DEBUG_HT(priv, "start Rx\n");
 639                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 640                 break;
 641         case IEEE80211_AMPDU_RX_STOP:
 642                 IWL_DEBUG_HT(priv, "stop Rx\n");
 643                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 644                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 645                         ret = 0;
 646                 break;
 647         case IEEE80211_AMPDU_TX_START:
 648                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 649                         break;
 650                 IWL_DEBUG_HT(priv, "start Tx\n");
 651                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 652                 break;
 653         case IEEE80211_AMPDU_TX_STOP:
 654                 IWL_DEBUG_HT(priv, "stop Tx\n");
 655                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 656                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 657                         priv->agg_tids_count--;
 658                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 659                                      priv->agg_tids_count);
 660                 }
 661                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 662                         ret = 0;
 663                 if (!priv->agg_tids_count && cfg(priv)->ht_params &&
 664                     cfg(priv)->ht_params->use_rts_for_aggregation) {
 665                         /*
 666                          * switch off RTS/CTS if it was previously enabled
 667                          */
 668                         sta_priv->lq_sta.lq.general_params.flags &=
 669                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 670                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 671                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 672                 }
 673                 break;
 674         case IEEE80211_AMPDU_TX_OPERATIONAL:
 675                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 676                 break;
 677         }
 678         mutex_unlock(&priv->shrd->mutex);
 679         IWL_DEBUG_MAC80211(priv, "leave\n");
 680         return ret;
 681 }
 682
 683 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 684                               struct ieee80211_vif *vif,
 685                               struct ieee80211_sta *sta)
 686 {
 687         struct iwl_priv *priv = hw->priv;
 688         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 689         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 690         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 691         int ret = 0;
 692         u8 sta_id;
 693
 694         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
 695                         sta->addr);
 696         mutex_lock(&priv->shrd->mutex);
 697         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 698                         sta->addr);
 699         sta_priv->sta_id = IWL_INVALID_STATION;
 700
 701         atomic_set(&sta_priv->pending_frames, 0);
 702         if (vif->type == NL80211_IFTYPE_AP)
 703                 sta_priv->client = true;
 704
 705         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 706                                      is_ap, sta, &sta_id);
 707         if (ret) {
 708                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 709                         sta->addr, ret);
 710                 /* Should we return success if return code is EEXIST ? */
 711                 goto out;
 712         }
 713
 714         sta_priv->sta_id = sta_id;
 715
 716         /* Initialize rate scaling */
 717         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
 718                        sta->addr);
 719         iwl_rs_rate_init(priv, sta, sta_id);
 720  out:
 721         mutex_unlock(&priv->shrd->mutex);
 722         IWL_DEBUG_MAC80211(priv, "leave\n");
 723
 724         return ret;
 725 }
 726
 727 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 728                                 struct ieee80211_channel_switch *ch_switch)
 729 {
 730         struct iwl_priv *priv = hw->priv;
 731         const struct iwl_channel_info *ch_info;
 732         struct ieee80211_conf *conf = &hw->conf;
 733         struct ieee80211_channel *channel = ch_switch->channel;
 734         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 735         /*
 736          * MULTI-FIXME
 737          * When we add support for multiple interfaces, we need to
 738          * revisit this. The channel switch command in the device
 739          * only affects the BSS context, but what does that really
 740          * mean? And what if we get a CSA on the second interface?
 741          * This needs a lot of work.
 742          */
 743         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 744         u16 ch;
 745
 746         IWL_DEBUG_MAC80211(priv, "enter\n");
 747
 748         mutex_lock(&priv->shrd->mutex);
 749
 750         if (iwl_is_rfkill(priv->shrd))
 751                 goto out;
 752
 753         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 754             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 755             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 756                 goto out;
 757
 758         if (!iwl_is_associated_ctx(ctx))
 759                 goto out;
 760
 761         if (!cfg(priv)->lib->set_channel_switch)
 762                 goto out;
 763
 764         ch = channel->hw_value;
 765         if (le16_to_cpu(ctx->active.channel) == ch)
 766                 goto out;
 767
 768         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 769         if (!is_channel_valid(ch_info)) {
 770                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 771                 goto out;
 772         }
 773
 774         spin_lock_irq(&priv->shrd->lock);
 775
 776         priv->current_ht_config.smps = conf->smps_mode;
 777
 778         /* Configure HT40 channels */
 779         ctx->ht.enabled = conf_is_ht(conf);
 780         if (ctx->ht.enabled)
 781                 iwlagn_config_ht40(conf, ctx);
 782         else
 783                 ctx->ht.is_40mhz = false;
 784
 785         if ((le16_to_cpu(ctx->staging.channel) != ch))
 786                 ctx->staging.flags = 0;
 787
 788         iwl_set_rxon_channel(priv, channel, ctx);
 789         iwl_set_rxon_ht(priv, ht_conf);
 790         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 791
 792         spin_unlock_irq(&priv->shrd->lock);
 793
 794         iwl_set_rate(priv);
 795         /*
 796          * at this point, staging_rxon has the
 797          * configuration for channel switch
 798          */
 799         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 800         priv->switch_channel = cpu_to_le16(ch);
 801         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 802                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 803                 priv->switch_channel = 0;
 804                 ieee80211_chswitch_done(ctx->vif, false);
 805         }
 806
 807 out:
 808         mutex_unlock(&priv->shrd->mutex);
 809         IWL_DEBUG_MAC80211(priv, "leave\n");
 810 }
 811
 812 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 813                                     unsigned int changed_flags,
 814                                     unsigned int *total_flags,
 815                                     u64 multicast)
 816 {
 817         struct iwl_priv *priv = hw->priv;
 818         __le32 filter_or = 0, filter_nand = 0;
 819         struct iwl_rxon_context *ctx;
 820
 821 #define CHK(test, flag) do { \
 822         if (*total_flags & (test))              \
 823                 filter_or |= (flag);            \
 824         else                                    \
 825                 filter_nand |= (flag);          \
 826         } while (0)
 827
 828         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 829                         changed_flags, *total_flags);
 830
 831         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 832         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 833         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 834         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 835
 836 #undef CHK
 837
 838         mutex_lock(&priv->shrd->mutex);
 839
 840         for_each_context(priv, ctx) {
 841                 ctx->staging.filter_flags &= ~filter_nand;
 842                 ctx->staging.filter_flags |= filter_or;
 843
 844                 /*
 845                  * Not committing directly because hardware can perform a scan,
 846                  * but we'll eventually commit the filter flags change anyway.
 847                  */
 848         }
 849
 850         mutex_unlock(&priv->shrd->mutex);
 851
 852         /*
 853          * Receiving all multicast frames is always enabled by the
 854          * default flags setup in iwl_connection_init_rx_config()
 855          * since we currently do not support programming multicast
 856          * filters into the device.
 857          */
 858         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 859                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 860 }
 861
 862 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 863 {
 864         struct iwl_priv *priv = hw->priv;
 865
 866         mutex_lock(&priv->shrd->mutex);
 867         IWL_DEBUG_MAC80211(priv, "enter\n");
 868
 869         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 870                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 871                 goto done;
 872         }
 873         if (iwl_is_rfkill(priv->shrd)) {
 874                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 875                 goto done;
 876         }
 877
 878         /*
 879          * mac80211 will not push any more frames for transmit
 880          * until the flush is completed
 881          */
 882         if (drop) {
 883                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 884                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 885                         IWL_ERR(priv, "flush request fail\n");
 886                         goto done;
 887                 }
 888         }
 889         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 890         iwl_trans_wait_tx_queue_empty(trans(priv));
 891 done:
 892         mutex_unlock(&priv->shrd->mutex);
 893         IWL_DEBUG_MAC80211(priv, "leave\n");
 894 }
 895
 896 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 897                                      struct ieee80211_channel *channel,
 898                                      enum nl80211_channel_type channel_type,
 899                                      int duration)
 900 {
 901         struct iwl_priv *priv = hw->priv;
 902         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 903         int err = 0;
 904
 905         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 906                 return -EOPNOTSUPP;
 907
 908         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 909                 return -EOPNOTSUPP;
 910
 911         IWL_DEBUG_MAC80211(priv, "enter\n");
 912         mutex_lock(&priv->shrd->mutex);
 913
 914         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 915                 err = -EBUSY;
 916                 goto out;
 917         }
 918
 919         priv->hw_roc_channel = channel;
 920         priv->hw_roc_chantype = channel_type;
 921         /* convert from ms to TU */
 922         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 923         priv->hw_roc_start_notified = false;
 924         cancel_delayed_work(&priv->hw_roc_disable_work);
 925
 926         if (!ctx->is_active) {
 927                 static const struct iwl_qos_info default_qos_data = {
 928                         .def_qos_parm = {
 929                                 .ac[0] = {
 930                                         .cw_min = cpu_to_le16(3),
 931                                         .cw_max = cpu_to_le16(7),
 932                                         .aifsn = 2,
 933                                         .edca_txop = cpu_to_le16(1504),
 934                                 },
 935                                 .ac[1] = {
 936                                         .cw_min = cpu_to_le16(7),
 937                                         .cw_max = cpu_to_le16(15),
 938                                         .aifsn = 2,
 939                                         .edca_txop = cpu_to_le16(3008),
 940                                 },
 941                                 .ac[2] = {
 942                                         .cw_min = cpu_to_le16(15),
 943                                         .cw_max = cpu_to_le16(1023),
 944                                         .aifsn = 3,
 945                                 },
 946                                 .ac[3] = {
 947                                         .cw_min = cpu_to_le16(15),
 948                                         .cw_max = cpu_to_le16(1023),
 949                                         .aifsn = 7,
 950                                 },
 951                         },
 952                 };
 953
 954                 ctx->is_active = true;
 955                 ctx->qos_data = default_qos_data;
 956                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 957                 memcpy(ctx->staging.node_addr,
 958                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 959                        ETH_ALEN);
 960                 memcpy(ctx->staging.bssid_addr,
 961                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 962                        ETH_ALEN);
 963                 err = iwlagn_commit_rxon(priv, ctx);
 964                 if (err)
 965                         goto out;
 966                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
 967                                              RXON_FILTER_PROMISC_MSK |
 968                                              RXON_FILTER_CTL2HOST_MSK;
 969
 970                 err = iwlagn_commit_rxon(priv, ctx);
 971                 if (err) {
 972                         iwlagn_disable_roc(priv);
 973                         goto out;
 974                 }
 975                 priv->hw_roc_setup = true;
 976         }
 977
 978         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
 979         if (err)
 980                 iwlagn_disable_roc(priv);
 981
 982  out:
 983         mutex_unlock(&priv->shrd->mutex);
 984         IWL_DEBUG_MAC80211(priv, "leave\n");
 985
 986         return err;
 987 }
 988
 989 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
 990 {
 991         struct iwl_priv *priv = hw->priv;
 992
 993         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 994                 return -EOPNOTSUPP;
 995
 996         IWL_DEBUG_MAC80211(priv, "enter\n");
 997         mutex_lock(&priv->shrd->mutex);
 998         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
 999         iwlagn_disable_roc(priv);
1000         mutex_unlock(&priv->shrd->mutex);
1001         IWL_DEBUG_MAC80211(priv, "leave\n");
1002
1003         return 0;
1004 }
1005
1006 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1007                               struct ieee80211_vif *vif,
1008                               const u8 *bssid,
1009                               enum ieee80211_tx_sync_type type)
1010 {
1011         struct iwl_priv *priv = hw->priv;
1012         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1013         struct iwl_rxon_context *ctx = vif_priv->ctx;
1014         int ret;
1015         u8 sta_id;
1016
1017         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1018                 return 0;
1019
1020         IWL_DEBUG_MAC80211(priv, "enter\n");
1021         mutex_lock(&priv->shrd->mutex);
1022
1023         if (iwl_is_associated_ctx(ctx)) {
1024                 ret = 0;
1025                 goto out;
1026         }
1027
1028         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1029             &priv->shrd->status)) {
1030                 ret = -EBUSY;
1031                 goto out;
1032         }
1033
1034         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1035         if (ret)
1036                 goto out;
1037
1038         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1039                 ret = -EIO;
1040                 goto out_remove_sta;
1041         }
1042
1043         memcpy(ctx->bssid, bssid, ETH_ALEN);
1044         ctx->preauth_bssid = true;
1045
1046         ret = iwlagn_commit_rxon(priv, ctx);
1047
1048         if (ret == 0)
1049                 goto out;
1050
1051  out_remove_sta:
1052         iwl_remove_station(priv, sta_id, bssid);
1053  out:
1054         mutex_unlock(&priv->shrd->mutex);
1055         IWL_DEBUG_MAC80211(priv, "leave\n");
1056
1057         return ret;
1058 }
1059
1060 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1061                                    struct ieee80211_vif *vif,
1062                                    const u8 *bssid,
1063                                    enum ieee80211_tx_sync_type type)
1064 {
1065         struct iwl_priv *priv = hw->priv;
1066         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1067         struct iwl_rxon_context *ctx = vif_priv->ctx;
1068
1069         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1070                 return;
1071
1072         IWL_DEBUG_MAC80211(priv, "enter\n");
1073         mutex_lock(&priv->shrd->mutex);
1074
1075         if (iwl_is_associated_ctx(ctx))
1076                 goto out;
1077
1078         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1079         ctx->preauth_bssid = false;
1080         /* no need to commit */
1081  out:
1082         mutex_unlock(&priv->shrd->mutex);
1083         IWL_DEBUG_MAC80211(priv, "leave\n");
1084 }
1085
1086 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1087                            enum ieee80211_rssi_event rssi_event)
1088 {
1089         struct iwl_priv *priv = hw->priv;
1090
1091         IWL_DEBUG_MAC80211(priv, "enter\n");
1092         mutex_lock(&priv->shrd->mutex);
1093
1094         if (cfg(priv)->bt_params &&
1095                         cfg(priv)->bt_params->advanced_bt_coexist) {
1096                 if (rssi_event == RSSI_EVENT_LOW)
1097                         priv->bt_enable_pspoll = true;
1098                 else if (rssi_event == RSSI_EVENT_HIGH)
1099                         priv->bt_enable_pspoll = false;
1100
1101                 iwlagn_send_advance_bt_config(priv);
1102         } else {
1103                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1104                                 "ignoring RSSI callback\n");
1105         }
1106
1107         mutex_unlock(&priv->shrd->mutex);
1108         IWL_DEBUG_MAC80211(priv, "leave\n");
1109 }
1110
1111 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1112                            struct ieee80211_sta *sta, bool set)
1113 {
1114         struct iwl_priv *priv = hw->priv;
1115
1116         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1117
1118         return 0;
1119 }
1120
1121 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1122                     struct ieee80211_vif *vif, u16 queue,
1123                     const struct ieee80211_tx_queue_params *params)
1124 {
1125         struct iwl_priv *priv = hw->priv;
1126         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1127         struct iwl_rxon_context *ctx = vif_priv->ctx;
1128         unsigned long flags;
1129         int q;
1130
1131         if (WARN_ON(!ctx))
1132                 return -EINVAL;
1133
1134         IWL_DEBUG_MAC80211(priv, "enter\n");
1135
1136         if (!iwl_is_ready_rf(priv->shrd)) {
1137                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1138                 return -EIO;
1139         }
1140
1141         if (queue >= AC_NUM) {
1142                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1143                 return 0;
1144         }
1145
1146         q = AC_NUM - 1 - queue;
1147
1148         spin_lock_irqsave(&priv->shrd->lock, flags);
1149
1150         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1151                 cpu_to_le16(params->cw_min);
1152         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1153                 cpu_to_le16(params->cw_max);
1154         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1155         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1156                         cpu_to_le16((params->txop * 32));
1157
1158         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1159
1160         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1161
1162         IWL_DEBUG_MAC80211(priv, "leave\n");
1163         return 0;
1164 }
1165
1166 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1167 {
1168         struct iwl_priv *priv = hw->priv;
1169
1170         return priv->ibss_manager == IWL_IBSS_MANAGER;
1171 }
1172
1173 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1174 {
1175         iwl_connection_init_rx_config(priv, ctx);
1176
1177         iwlagn_set_rxon_chain(priv, ctx);
1178
1179         return iwlagn_commit_rxon(priv, ctx);
1180 }
1181
1182 static int iwl_setup_interface(struct iwl_priv *priv,
1183                                struct iwl_rxon_context *ctx)
1184 {
1185         struct ieee80211_vif *vif = ctx->vif;
1186         int err;
1187
1188         lockdep_assert_held(&priv->shrd->mutex);
1189
1190         /*
1191          * This variable will be correct only when there's just
1192          * a single context, but all code using it is for hardware
1193          * that supports only one context.
1194          */
1195         priv->iw_mode = vif->type;
1196
1197         ctx->is_active = true;
1198
1199         err = iwl_set_mode(priv, ctx);
1200         if (err) {
1201                 if (!ctx->always_active)
1202                         ctx->is_active = false;
1203                 return err;
1204         }
1205
1206         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1207             vif->type == NL80211_IFTYPE_ADHOC) {
1208                 /*
1209                  * pretend to have high BT traffic as long as we
1210                  * are operating in IBSS mode, as this will cause
1211                  * the rate scaling etc. to behave as intended.
1212                  */
1213                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1220                              struct ieee80211_vif *vif)
1221 {
1222         struct iwl_priv *priv = hw->priv;
1223         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1224         struct iwl_rxon_context *tmp, *ctx = NULL;
1225         int err;
1226         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1227
1228         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1229                            viftype, vif->addr);
1230
1231         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1232
1233         mutex_lock(&priv->shrd->mutex);
1234
1235         iwlagn_disable_roc(priv);
1236
1237         if (!iwl_is_ready_rf(priv->shrd)) {
1238                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1239                 err = -EINVAL;
1240                 goto out;
1241         }
1242
1243         for_each_context(priv, tmp) {
1244                 u32 possible_modes =
1245                         tmp->interface_modes | tmp->exclusive_interface_modes;
1246
1247                 if (tmp->vif) {
1248                         /* check if this busy context is exclusive */
1249                         if (tmp->exclusive_interface_modes &
1250                                                 BIT(tmp->vif->type)) {
1251                                 err = -EINVAL;
1252                                 goto out;
1253                         }
1254                         continue;
1255                 }
1256
1257                 if (!(possible_modes & BIT(viftype)))
1258                         continue;
1259
1260                 /* have maybe usable context w/o interface */
1261                 ctx = tmp;
1262                 break;
1263         }
1264
1265         if (!ctx) {
1266                 err = -EOPNOTSUPP;
1267                 goto out;
1268         }
1269
1270         vif_priv->ctx = ctx;
1271         ctx->vif = vif;
1272
1273         err = iwl_setup_interface(priv, ctx);
1274         if (!err)
1275                 goto out;
1276
1277         ctx->vif = NULL;
1278         priv->iw_mode = NL80211_IFTYPE_STATION;
1279  out:
1280         mutex_unlock(&priv->shrd->mutex);
1281
1282         IWL_DEBUG_MAC80211(priv, "leave\n");
1283         return err;
1284 }
1285
1286 static void iwl_teardown_interface(struct iwl_priv *priv,
1287                                    struct ieee80211_vif *vif,
1288                                    bool mode_change)
1289 {
1290         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1291
1292         lockdep_assert_held(&priv->shrd->mutex);
1293
1294         if (priv->scan_vif == vif) {
1295                 iwl_scan_cancel_timeout(priv, 200);
1296                 iwl_force_scan_end(priv);
1297         }
1298
1299         if (!mode_change) {
1300                 iwl_set_mode(priv, ctx);
1301                 if (!ctx->always_active)
1302                         ctx->is_active = false;
1303         }
1304
1305         /*
1306          * When removing the IBSS interface, overwrite the
1307          * BT traffic load with the stored one from the last
1308          * notification, if any. If this is a device that
1309          * doesn't implement this, this has no effect since
1310          * both values are the same and zero.
1311          */
1312         if (vif->type == NL80211_IFTYPE_ADHOC)
1313                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1314 }
1315
1316 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1317                               struct ieee80211_vif *vif)
1318 {
1319         struct iwl_priv *priv = hw->priv;
1320         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1321
1322         IWL_DEBUG_MAC80211(priv, "enter\n");
1323
1324         mutex_lock(&priv->shrd->mutex);
1325
1326         if (WARN_ON(ctx->vif != vif)) {
1327                 struct iwl_rxon_context *tmp;
1328                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1329                 for_each_context(priv, tmp)
1330                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1331                                 tmp->ctxid, tmp, tmp->vif);
1332         }
1333         ctx->vif = NULL;
1334
1335         iwl_teardown_interface(priv, vif, false);
1336
1337         mutex_unlock(&priv->shrd->mutex);
1338
1339         IWL_DEBUG_MAC80211(priv, "leave\n");
1340
1341 }
1342
1343 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1344                                 struct ieee80211_vif *vif,
1345                                 enum nl80211_iftype newtype, bool newp2p)
1346 {
1347         struct iwl_priv *priv = hw->priv;
1348         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1349         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1350         struct iwl_rxon_context *tmp;
1351         enum nl80211_iftype newviftype = newtype;
1352         u32 interface_modes;
1353         int err;
1354
1355         IWL_DEBUG_MAC80211(priv, "enter\n");
1356
1357         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1358
1359         mutex_lock(&priv->shrd->mutex);
1360
1361         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1362                 /*
1363                  * Huh? But wait ... this can maybe happen when
1364                  * we're in the middle of a firmware restart!
1365                  */
1366                 err = -EBUSY;
1367                 goto out;
1368         }
1369
1370         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1371
1372         if (!(interface_modes & BIT(newtype))) {
1373                 err = -EBUSY;
1374                 goto out;
1375         }
1376
1377         /*
1378          * Refuse a change that should be done by moving from the PAN
1379          * context to the BSS context instead, if the BSS context is
1380          * available and can support the new interface type.
1381          */
1382         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1383             (bss_ctx->interface_modes & BIT(newtype) ||
1384              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1385                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1386                 err = -EBUSY;
1387                 goto out;
1388         }
1389
1390         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1391                 for_each_context(priv, tmp) {
1392                         if (ctx == tmp)
1393                                 continue;
1394
1395                         if (!tmp->vif)
1396                                 continue;
1397
1398                         /*
1399                          * The current mode switch would be exclusive, but
1400                          * another context is active ... refuse the switch.
1401                          */
1402                         err = -EBUSY;
1403                         goto out;
1404                 }
1405         }
1406
1407         /* success */
1408         iwl_teardown_interface(priv, vif, true);
1409         vif->type = newviftype;
1410         vif->p2p = newp2p;
1411         err = iwl_setup_interface(priv, ctx);
1412         WARN_ON(err);
1413         /*
1414          * We've switched internally, but submitting to the
1415          * device may have failed for some reason. Mask this
1416          * error, because otherwise mac80211 will not switch
1417          * (and set the interface type back) and we'll be
1418          * out of sync with it.
1419          */
1420         err = 0;
1421
1422  out:
1423         mutex_unlock(&priv->shrd->mutex);
1424         IWL_DEBUG_MAC80211(priv, "leave\n");
1425
1426         return err;
1427 }
1428
1429 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1430                     struct ieee80211_vif *vif,
1431                     struct cfg80211_scan_request *req)
1432 {
1433         struct iwl_priv *priv = hw->priv;
1434         int ret;
1435
1436         IWL_DEBUG_MAC80211(priv, "enter\n");
1437
1438         if (req->n_channels == 0)
1439                 return -EINVAL;
1440
1441         mutex_lock(&priv->shrd->mutex);
1442
1443         /*
1444          * If an internal scan is in progress, just set
1445          * up the scan_request as per above.
1446          */
1447         if (priv->scan_type != IWL_SCAN_NORMAL) {
1448                 IWL_DEBUG_SCAN(priv,
1449                                "SCAN request during internal scan - defer\n");
1450                 priv->scan_request = req;
1451                 priv->scan_vif = vif;
1452                 ret = 0;
1453         } else {
1454                 priv->scan_request = req;
1455                 priv->scan_vif = vif;
1456                 /*
1457                  * mac80211 will only ask for one band at a time
1458                  * so using channels[0] here is ok
1459                  */
1460                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1461                                         req->channels[0]->band);
1462                 if (ret) {
1463                         priv->scan_request = NULL;
1464                         priv->scan_vif = NULL;
1465                 }
1466         }
1467
1468         IWL_DEBUG_MAC80211(priv, "leave\n");
1469
1470         mutex_unlock(&priv->shrd->mutex);
1471
1472         return ret;
1473 }
1474
1475 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1476                        struct ieee80211_vif *vif,
1477                        struct ieee80211_sta *sta)
1478 {
1479         struct iwl_priv *priv = hw->priv;
1480         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1481         int ret;
1482
1483         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1484                            "station %pM\n", sta->addr);
1485         mutex_lock(&priv->shrd->mutex);
1486         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1487                         sta->addr);
1488         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1489         if (ret)
1490                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1491                         sta->addr);
1492         mutex_unlock(&priv->shrd->mutex);
1493         IWL_DEBUG_MAC80211(priv, "leave\n");
1494
1495         return ret;
1496 }
1497
1498 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1499 {
1500         unsigned long flags;
1501
1502         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1503         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1504         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1505         priv->stations[sta_id].sta.sta.modify_mask = 0;
1506         priv->stations[sta_id].sta.sleep_tx_count = 0;
1507         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1508         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1509         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1510
1511 }
1512
1513 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1514                            struct ieee80211_vif *vif,
1515                            enum sta_notify_cmd cmd,
1516                            struct ieee80211_sta *sta)
1517 {
1518         struct iwl_priv *priv = hw->priv;
1519         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1520         int sta_id;
1521
1522         IWL_DEBUG_MAC80211(priv, "enter\n");
1523
1524         switch (cmd) {
1525         case STA_NOTIFY_SLEEP:
1526                 WARN_ON(!sta_priv->client);
1527                 sta_priv->asleep = true;
1528                 if (atomic_read(&sta_priv->pending_frames) > 0)
1529                         ieee80211_sta_block_awake(hw, sta, true);
1530                 break;
1531         case STA_NOTIFY_AWAKE:
1532                 WARN_ON(!sta_priv->client);
1533                 if (!sta_priv->asleep)
1534                         break;
1535                 sta_priv->asleep = false;
1536                 sta_id = iwl_sta_id(sta);
1537                 if (sta_id != IWL_INVALID_STATION)
1538                         iwl_sta_modify_ps_wake(priv, sta_id);
1539                 break;
1540         default:
1541                 break;
1542         }
1543         IWL_DEBUG_MAC80211(priv, "leave\n");
1544 }
1545
1546 struct ieee80211_ops iwlagn_hw_ops = {
1547         .tx = iwlagn_mac_tx,
1548         .start = iwlagn_mac_start,
1549         .stop = iwlagn_mac_stop,
1550 #ifdef CONFIG_PM_SLEEP
1551         .suspend = iwlagn_mac_suspend,
1552         .resume = iwlagn_mac_resume,
1553 #endif
1554         .add_interface = iwlagn_mac_add_interface,
1555         .remove_interface = iwlagn_mac_remove_interface,
1556         .change_interface = iwlagn_mac_change_interface,
1557         .config = iwlagn_mac_config,
1558         .configure_filter = iwlagn_configure_filter,
1559         .set_key = iwlagn_mac_set_key,
1560         .update_tkip_key = iwlagn_mac_update_tkip_key,
1561         .set_rekey_data = iwlagn_mac_set_rekey_data,
1562         .conf_tx = iwlagn_mac_conf_tx,
1563         .bss_info_changed = iwlagn_bss_info_changed,
1564         .ampdu_action = iwlagn_mac_ampdu_action,
1565         .hw_scan = iwlagn_mac_hw_scan,
1566         .sta_notify = iwlagn_mac_sta_notify,
1567         .sta_add = iwlagn_mac_sta_add,
1568         .sta_remove = iwlagn_mac_sta_remove,
1569         .channel_switch = iwlagn_mac_channel_switch,
1570         .flush = iwlagn_mac_flush,
1571         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1572         .remain_on_channel = iwlagn_mac_remain_on_channel,
1573         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1574         .rssi_callback = iwlagn_mac_rssi_callback,
1575         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1576         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1577         .tx_sync = iwlagn_mac_tx_sync,
1578         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1579         .set_tim = iwlagn_mac_set_tim,
1580 };
1581
1582 /* This function both allocates and initializes hw and priv. */
1583 struct ieee80211_hw *iwl_alloc_all(void)
1584 {
1585         struct iwl_priv *priv;
1586         /* mac80211 allocates memory for this device instance, including
1587          *   space for this driver's private structure */
1588         struct ieee80211_hw *hw;
1589
1590         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1591         if (!hw)
1592                 goto out;
1593
1594         priv = hw->priv;
1595         priv->hw = hw;
1596
1597 out:
1598         return hw;
1599 }