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/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(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 = hw->priv;
 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 = hw->priv;
 336
 337         IWL_DEBUG_MAC80211(priv, "enter\n");
 338
 339         if (!priv->is_open)
 340                 return;
 341
 342         priv->is_open = 0;
 343
 344         iwl_down(priv);
 345
 346         flush_workqueue(priv->shrd->workqueue);
 347
 348         /* User space software may expect getting rfkill changes
 349          * even if interface is down */
 350         iwl_write32(trans(priv), CSR_INT, 0xFFFFFFFF);
 351         iwl_enable_rfkill_int(priv);
 352
 353         IWL_DEBUG_MAC80211(priv, "leave\n");
 354 }
 355
 356 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 357                                       struct ieee80211_vif *vif,
 358                                       struct cfg80211_gtk_rekey_data *data)
 359 {
 360         struct iwl_priv *priv = hw->priv;
 361
 362         if (iwlagn_mod_params.sw_crypto)
 363                 return;
 364
 365         IWL_DEBUG_MAC80211(priv, "enter\n");
 366         mutex_lock(&priv->shrd->mutex);
 367
 368         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 369                 goto out;
 370
 371         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 372         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 373         priv->replay_ctr =
 374                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 375         priv->have_rekey_data = true;
 376
 377  out:
 378         mutex_unlock(&priv->shrd->mutex);
 379         IWL_DEBUG_MAC80211(priv, "leave\n");
 380 }
 381
 382 #ifdef CONFIG_PM_SLEEP
 383
 384 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 385                               struct cfg80211_wowlan *wowlan)
 386 {
 387         struct iwl_priv *priv = hw->priv;
 388         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 389         int ret;
 390
 391         if (WARN_ON(!wowlan))
 392                 return -EINVAL;
 393
 394         IWL_DEBUG_MAC80211(priv, "enter\n");
 395         mutex_lock(&priv->shrd->mutex);
 396
 397         /* Don't attempt WoWLAN when not associated, tear down instead. */
 398         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 399             !iwl_is_associated_ctx(ctx)) {
 400                 ret = 1;
 401                 goto out;
 402         }
 403
 404         ret = iwlagn_suspend(priv, hw, wowlan);
 405         if (ret)
 406                 goto error;
 407
 408         device_set_wakeup_enable(trans(priv)->dev, true);
 409
 410         /* Now let the ucode operate on its own */
 411         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_SET,
 412                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 413
 414         goto out;
 415
 416  error:
 417         priv->shrd->wowlan = false;
 418         iwlagn_prepare_restart(priv);
 419         ieee80211_restart_hw(priv->hw);
 420  out:
 421         mutex_unlock(&priv->shrd->mutex);
 422         IWL_DEBUG_MAC80211(priv, "leave\n");
 423
 424         return ret;
 425 }
 426
 427 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 428 {
 429         struct iwl_priv *priv = hw->priv;
 430         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 431         struct ieee80211_vif *vif;
 432         unsigned long flags;
 433         u32 base, status = 0xffffffff;
 434         int ret = -EIO;
 435
 436         IWL_DEBUG_MAC80211(priv, "enter\n");
 437         mutex_lock(&priv->shrd->mutex);
 438
 439         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 440                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 441
 442         base = priv->shrd->device_pointers.error_event_table;
 443         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 444                 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
 445                 ret = iwl_grab_nic_access_silent(trans(priv));
 446                 if (ret == 0) {
 447                         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
 448                         status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 449                         iwl_release_nic_access(trans(priv));
 450                 }
 451                 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
 452
 453 #ifdef CONFIG_IWLWIFI_DEBUGFS
 454                 if (ret == 0) {
 455                         struct iwl_trans *trans = trans(priv);
 456                         if (!priv->wowlan_sram)
 457                                 priv->wowlan_sram =
 458                                         kzalloc(trans->ucode_wowlan.data.len,
 459                                                 GFP_KERNEL);
 460
 461                         if (priv->wowlan_sram)
 462                                 _iwl_read_targ_mem_words(
 463                                         trans(priv), 0x800000,
 464                                         priv->wowlan_sram,
 465                                         trans->ucode_wowlan.data.len / 4);
 466                 }
 467 #endif
 468         }
 469
 470         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 471         vif = ctx->vif;
 472
 473         priv->shrd->wowlan = false;
 474
 475         device_set_wakeup_enable(trans(priv)->dev, false);
 476
 477         iwlagn_prepare_restart(priv);
 478
 479         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 480         iwl_connection_init_rx_config(priv, ctx);
 481         iwlagn_set_rxon_chain(priv, ctx);
 482
 483         mutex_unlock(&priv->shrd->mutex);
 484         IWL_DEBUG_MAC80211(priv, "leave\n");
 485
 486         ieee80211_resume_disconnect(vif);
 487
 488         return 1;
 489 }
 490
 491 #endif
 492
 493 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 494 {
 495         struct iwl_priv *priv = hw->priv;
 496
 497         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 498                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 499
 500         if (iwlagn_tx_skb(priv, skb))
 501                 dev_kfree_skb_any(skb);
 502 }
 503
 504 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 505                                        struct ieee80211_vif *vif,
 506                                        struct ieee80211_key_conf *keyconf,
 507                                        struct ieee80211_sta *sta,
 508                                        u32 iv32, u16 *phase1key)
 509 {
 510         struct iwl_priv *priv = hw->priv;
 511
 512         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 513 }
 514
 515 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 516                               struct ieee80211_vif *vif,
 517                               struct ieee80211_sta *sta,
 518                               struct ieee80211_key_conf *key)
 519 {
 520         struct iwl_priv *priv = hw->priv;
 521         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 522         struct iwl_rxon_context *ctx = vif_priv->ctx;
 523         int ret;
 524         bool is_default_wep_key = false;
 525
 526         IWL_DEBUG_MAC80211(priv, "enter\n");
 527
 528         if (iwlagn_mod_params.sw_crypto) {
 529                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 530                 return -EOPNOTSUPP;
 531         }
 532
 533         switch (key->cipher) {
 534         case WLAN_CIPHER_SUITE_TKIP:
 535                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 536                 /* fall through */
 537         case WLAN_CIPHER_SUITE_CCMP:
 538                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 539                 break;
 540         default:
 541                 break;
 542         }
 543
 544         /*
 545          * We could program these keys into the hardware as well, but we
 546          * don't expect much multicast traffic in IBSS and having keys
 547          * for more stations is probably more useful.
 548          *
 549          * Mark key TX-only and return 0.
 550          */
 551         if (vif->type == NL80211_IFTYPE_ADHOC &&
 552             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 553                 key->hw_key_idx = WEP_INVALID_OFFSET;
 554                 return 0;
 555         }
 556
 557         /* If they key was TX-only, accept deletion */
 558         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 559                 return 0;
 560
 561         mutex_lock(&priv->shrd->mutex);
 562         iwl_scan_cancel_timeout(priv, 100);
 563
 564         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 565
 566         /*
 567          * If we are getting WEP group key and we didn't receive any key mapping
 568          * so far, we are in legacy wep mode (group key only), otherwise we are
 569          * in 1X mode.
 570          * In legacy wep mode, we use another host command to the uCode.
 571          */
 572         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 573              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 574                 if (cmd == SET_KEY)
 575                         is_default_wep_key = !ctx->key_mapping_keys;
 576                 else
 577                         is_default_wep_key =
 578                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 579         }
 580
 581
 582         switch (cmd) {
 583         case SET_KEY:
 584                 if (is_default_wep_key) {
 585                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 586                         break;
 587                 }
 588                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 589                 if (ret) {
 590                         /*
 591                          * can't add key for RX, but we don't need it
 592                          * in the device for TX so still return 0
 593                          */
 594                         ret = 0;
 595                         key->hw_key_idx = WEP_INVALID_OFFSET;
 596                 }
 597
 598                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 599                 break;
 600         case DISABLE_KEY:
 601                 if (is_default_wep_key)
 602                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 603                 else
 604                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 605
 606                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 607                 break;
 608         default:
 609                 ret = -EINVAL;
 610         }
 611
 612         mutex_unlock(&priv->shrd->mutex);
 613         IWL_DEBUG_MAC80211(priv, "leave\n");
 614
 615         return ret;
 616 }
 617
 618 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 619                                    struct ieee80211_vif *vif,
 620                                    enum ieee80211_ampdu_mlme_action action,
 621                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 622                                    u8 buf_size)
 623 {
 624         struct iwl_priv *priv = hw->priv;
 625         int ret = -EINVAL;
 626         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 627
 628         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 629                      sta->addr, tid);
 630
 631         if (!(cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE))
 632                 return -EACCES;
 633
 634         IWL_DEBUG_MAC80211(priv, "enter\n");
 635         mutex_lock(&priv->shrd->mutex);
 636
 637         switch (action) {
 638         case IEEE80211_AMPDU_RX_START:
 639                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 640                         break;
 641                 IWL_DEBUG_HT(priv, "start Rx\n");
 642                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 643                 break;
 644         case IEEE80211_AMPDU_RX_STOP:
 645                 IWL_DEBUG_HT(priv, "stop Rx\n");
 646                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 647                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 648                         ret = 0;
 649                 break;
 650         case IEEE80211_AMPDU_TX_START:
 651                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 652                         break;
 653                 IWL_DEBUG_HT(priv, "start Tx\n");
 654                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 655                 break;
 656         case IEEE80211_AMPDU_TX_STOP:
 657                 IWL_DEBUG_HT(priv, "stop Tx\n");
 658                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 659                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 660                         priv->agg_tids_count--;
 661                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 662                                      priv->agg_tids_count);
 663                 }
 664                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 665                         ret = 0;
 666                 if (!priv->agg_tids_count && cfg(priv)->ht_params &&
 667                     cfg(priv)->ht_params->use_rts_for_aggregation) {
 668                         /*
 669                          * switch off RTS/CTS if it was previously enabled
 670                          */
 671                         sta_priv->lq_sta.lq.general_params.flags &=
 672                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 673                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 674                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 675                 }
 676                 break;
 677         case IEEE80211_AMPDU_TX_OPERATIONAL:
 678                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 679                 break;
 680         }
 681         mutex_unlock(&priv->shrd->mutex);
 682         IWL_DEBUG_MAC80211(priv, "leave\n");
 683         return ret;
 684 }
 685
 686 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 687                               struct ieee80211_vif *vif,
 688                               struct ieee80211_sta *sta)
 689 {
 690         struct iwl_priv *priv = hw->priv;
 691         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 692         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 693         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 694         int ret = 0;
 695         u8 sta_id;
 696
 697         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
 698                         sta->addr);
 699         mutex_lock(&priv->shrd->mutex);
 700         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 701                         sta->addr);
 702         sta_priv->sta_id = IWL_INVALID_STATION;
 703
 704         atomic_set(&sta_priv->pending_frames, 0);
 705         if (vif->type == NL80211_IFTYPE_AP)
 706                 sta_priv->client = true;
 707
 708         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 709                                      is_ap, sta, &sta_id);
 710         if (ret) {
 711                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 712                         sta->addr, ret);
 713                 /* Should we return success if return code is EEXIST ? */
 714                 goto out;
 715         }
 716
 717         sta_priv->sta_id = sta_id;
 718
 719         /* Initialize rate scaling */
 720         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
 721                        sta->addr);
 722         iwl_rs_rate_init(priv, sta, sta_id);
 723  out:
 724         mutex_unlock(&priv->shrd->mutex);
 725         IWL_DEBUG_MAC80211(priv, "leave\n");
 726
 727         return ret;
 728 }
 729
 730 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 731                                 struct ieee80211_channel_switch *ch_switch)
 732 {
 733         struct iwl_priv *priv = hw->priv;
 734         const struct iwl_channel_info *ch_info;
 735         struct ieee80211_conf *conf = &hw->conf;
 736         struct ieee80211_channel *channel = ch_switch->channel;
 737         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 738         /*
 739          * MULTI-FIXME
 740          * When we add support for multiple interfaces, we need to
 741          * revisit this. The channel switch command in the device
 742          * only affects the BSS context, but what does that really
 743          * mean? And what if we get a CSA on the second interface?
 744          * This needs a lot of work.
 745          */
 746         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 747         u16 ch;
 748
 749         IWL_DEBUG_MAC80211(priv, "enter\n");
 750
 751         mutex_lock(&priv->shrd->mutex);
 752
 753         if (iwl_is_rfkill(priv->shrd))
 754                 goto out;
 755
 756         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 757             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 758             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 759                 goto out;
 760
 761         if (!iwl_is_associated_ctx(ctx))
 762                 goto out;
 763
 764         if (!cfg(priv)->lib->set_channel_switch)
 765                 goto out;
 766
 767         ch = channel->hw_value;
 768         if (le16_to_cpu(ctx->active.channel) == ch)
 769                 goto out;
 770
 771         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 772         if (!is_channel_valid(ch_info)) {
 773                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 774                 goto out;
 775         }
 776
 777         spin_lock_irq(&priv->shrd->lock);
 778
 779         priv->current_ht_config.smps = conf->smps_mode;
 780
 781         /* Configure HT40 channels */
 782         ctx->ht.enabled = conf_is_ht(conf);
 783         if (ctx->ht.enabled)
 784                 iwlagn_config_ht40(conf, ctx);
 785         else
 786                 ctx->ht.is_40mhz = false;
 787
 788         if ((le16_to_cpu(ctx->staging.channel) != ch))
 789                 ctx->staging.flags = 0;
 790
 791         iwl_set_rxon_channel(priv, channel, ctx);
 792         iwl_set_rxon_ht(priv, ht_conf);
 793         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 794
 795         spin_unlock_irq(&priv->shrd->lock);
 796
 797         iwl_set_rate(priv);
 798         /*
 799          * at this point, staging_rxon has the
 800          * configuration for channel switch
 801          */
 802         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 803         priv->switch_channel = cpu_to_le16(ch);
 804         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 805                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 806                 priv->switch_channel = 0;
 807                 ieee80211_chswitch_done(ctx->vif, false);
 808         }
 809
 810 out:
 811         mutex_unlock(&priv->shrd->mutex);
 812         IWL_DEBUG_MAC80211(priv, "leave\n");
 813 }
 814
 815 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 816                                     unsigned int changed_flags,
 817                                     unsigned int *total_flags,
 818                                     u64 multicast)
 819 {
 820         struct iwl_priv *priv = hw->priv;
 821         __le32 filter_or = 0, filter_nand = 0;
 822         struct iwl_rxon_context *ctx;
 823
 824 #define CHK(test, flag) do { \
 825         if (*total_flags & (test))              \
 826                 filter_or |= (flag);            \
 827         else                                    \
 828                 filter_nand |= (flag);          \
 829         } while (0)
 830
 831         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 832                         changed_flags, *total_flags);
 833
 834         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 835         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 836         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 837         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 838
 839 #undef CHK
 840
 841         mutex_lock(&priv->shrd->mutex);
 842
 843         for_each_context(priv, ctx) {
 844                 ctx->staging.filter_flags &= ~filter_nand;
 845                 ctx->staging.filter_flags |= filter_or;
 846
 847                 /*
 848                  * Not committing directly because hardware can perform a scan,
 849                  * but we'll eventually commit the filter flags change anyway.
 850                  */
 851         }
 852
 853         mutex_unlock(&priv->shrd->mutex);
 854
 855         /*
 856          * Receiving all multicast frames is always enabled by the
 857          * default flags setup in iwl_connection_init_rx_config()
 858          * since we currently do not support programming multicast
 859          * filters into the device.
 860          */
 861         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 862                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 863 }
 864
 865 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 866 {
 867         struct iwl_priv *priv = hw->priv;
 868
 869         mutex_lock(&priv->shrd->mutex);
 870         IWL_DEBUG_MAC80211(priv, "enter\n");
 871
 872         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 873                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 874                 goto done;
 875         }
 876         if (iwl_is_rfkill(priv->shrd)) {
 877                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 878                 goto done;
 879         }
 880
 881         /*
 882          * mac80211 will not push any more frames for transmit
 883          * until the flush is completed
 884          */
 885         if (drop) {
 886                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 887                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 888                         IWL_ERR(priv, "flush request fail\n");
 889                         goto done;
 890                 }
 891         }
 892         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 893         iwl_trans_wait_tx_queue_empty(trans(priv));
 894 done:
 895         mutex_unlock(&priv->shrd->mutex);
 896         IWL_DEBUG_MAC80211(priv, "leave\n");
 897 }
 898
 899 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 900                                      struct ieee80211_channel *channel,
 901                                      enum nl80211_channel_type channel_type,
 902                                      int duration)
 903 {
 904         struct iwl_priv *priv = hw->priv;
 905         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 906         int err = 0;
 907
 908         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 909                 return -EOPNOTSUPP;
 910
 911         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 912                 return -EOPNOTSUPP;
 913
 914         IWL_DEBUG_MAC80211(priv, "enter\n");
 915         mutex_lock(&priv->shrd->mutex);
 916
 917         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 918                 err = -EBUSY;
 919                 goto out;
 920         }
 921
 922         priv->hw_roc_channel = channel;
 923         priv->hw_roc_chantype = channel_type;
 924         /* convert from ms to TU */
 925         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 926         priv->hw_roc_start_notified = false;
 927         cancel_delayed_work(&priv->hw_roc_disable_work);
 928
 929         if (!ctx->is_active) {
 930                 static const struct iwl_qos_info default_qos_data = {
 931                         .def_qos_parm = {
 932                                 .ac[0] = {
 933                                         .cw_min = cpu_to_le16(3),
 934                                         .cw_max = cpu_to_le16(7),
 935                                         .aifsn = 2,
 936                                         .edca_txop = cpu_to_le16(1504),
 937                                 },
 938                                 .ac[1] = {
 939                                         .cw_min = cpu_to_le16(7),
 940                                         .cw_max = cpu_to_le16(15),
 941                                         .aifsn = 2,
 942                                         .edca_txop = cpu_to_le16(3008),
 943                                 },
 944                                 .ac[2] = {
 945                                         .cw_min = cpu_to_le16(15),
 946                                         .cw_max = cpu_to_le16(1023),
 947                                         .aifsn = 3,
 948                                 },
 949                                 .ac[3] = {
 950                                         .cw_min = cpu_to_le16(15),
 951                                         .cw_max = cpu_to_le16(1023),
 952                                         .aifsn = 7,
 953                                 },
 954                         },
 955                 };
 956
 957                 ctx->is_active = true;
 958                 ctx->qos_data = default_qos_data;
 959                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 960                 memcpy(ctx->staging.node_addr,
 961                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 962                        ETH_ALEN);
 963                 memcpy(ctx->staging.bssid_addr,
 964                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 965                        ETH_ALEN);
 966                 err = iwlagn_commit_rxon(priv, ctx);
 967                 if (err)
 968                         goto out;
 969                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
 970                                              RXON_FILTER_PROMISC_MSK |
 971                                              RXON_FILTER_CTL2HOST_MSK;
 972
 973                 err = iwlagn_commit_rxon(priv, ctx);
 974                 if (err) {
 975                         iwlagn_disable_roc(priv);
 976                         goto out;
 977                 }
 978                 priv->hw_roc_setup = true;
 979         }
 980
 981         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
 982         if (err)
 983                 iwlagn_disable_roc(priv);
 984
 985  out:
 986         mutex_unlock(&priv->shrd->mutex);
 987         IWL_DEBUG_MAC80211(priv, "leave\n");
 988
 989         return err;
 990 }
 991
 992 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
 993 {
 994         struct iwl_priv *priv = hw->priv;
 995
 996         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 997                 return -EOPNOTSUPP;
 998
 999         IWL_DEBUG_MAC80211(priv, "enter\n");
1000         mutex_lock(&priv->shrd->mutex);
1001         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1002         iwlagn_disable_roc(priv);
1003         mutex_unlock(&priv->shrd->mutex);
1004         IWL_DEBUG_MAC80211(priv, "leave\n");
1005
1006         return 0;
1007 }
1008
1009 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1010                               struct ieee80211_vif *vif,
1011                               const u8 *bssid,
1012                               enum ieee80211_tx_sync_type type)
1013 {
1014         struct iwl_priv *priv = hw->priv;
1015         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1016         struct iwl_rxon_context *ctx = vif_priv->ctx;
1017         int ret;
1018         u8 sta_id;
1019
1020         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1021                 return 0;
1022
1023         IWL_DEBUG_MAC80211(priv, "enter\n");
1024         mutex_lock(&priv->shrd->mutex);
1025
1026         if (iwl_is_associated_ctx(ctx)) {
1027                 ret = 0;
1028                 goto out;
1029         }
1030
1031         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1032             &priv->shrd->status)) {
1033                 ret = -EBUSY;
1034                 goto out;
1035         }
1036
1037         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1038         if (ret)
1039                 goto out;
1040
1041         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1042                 ret = -EIO;
1043                 goto out_remove_sta;
1044         }
1045
1046         memcpy(ctx->bssid, bssid, ETH_ALEN);
1047         ctx->preauth_bssid = true;
1048
1049         ret = iwlagn_commit_rxon(priv, ctx);
1050
1051         if (ret == 0)
1052                 goto out;
1053
1054  out_remove_sta:
1055         iwl_remove_station(priv, sta_id, bssid);
1056  out:
1057         mutex_unlock(&priv->shrd->mutex);
1058         IWL_DEBUG_MAC80211(priv, "leave\n");
1059
1060         return ret;
1061 }
1062
1063 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1064                                    struct ieee80211_vif *vif,
1065                                    const u8 *bssid,
1066                                    enum ieee80211_tx_sync_type type)
1067 {
1068         struct iwl_priv *priv = hw->priv;
1069         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1070         struct iwl_rxon_context *ctx = vif_priv->ctx;
1071
1072         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1073                 return;
1074
1075         IWL_DEBUG_MAC80211(priv, "enter\n");
1076         mutex_lock(&priv->shrd->mutex);
1077
1078         if (iwl_is_associated_ctx(ctx))
1079                 goto out;
1080
1081         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1082         ctx->preauth_bssid = false;
1083         /* no need to commit */
1084  out:
1085         mutex_unlock(&priv->shrd->mutex);
1086         IWL_DEBUG_MAC80211(priv, "leave\n");
1087 }
1088
1089 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1090                            enum ieee80211_rssi_event rssi_event)
1091 {
1092         struct iwl_priv *priv = hw->priv;
1093
1094         IWL_DEBUG_MAC80211(priv, "enter\n");
1095         mutex_lock(&priv->shrd->mutex);
1096
1097         if (cfg(priv)->bt_params &&
1098                         cfg(priv)->bt_params->advanced_bt_coexist) {
1099                 if (rssi_event == RSSI_EVENT_LOW)
1100                         priv->bt_enable_pspoll = true;
1101                 else if (rssi_event == RSSI_EVENT_HIGH)
1102                         priv->bt_enable_pspoll = false;
1103
1104                 iwlagn_send_advance_bt_config(priv);
1105         } else {
1106                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1107                                 "ignoring RSSI callback\n");
1108         }
1109
1110         mutex_unlock(&priv->shrd->mutex);
1111         IWL_DEBUG_MAC80211(priv, "leave\n");
1112 }
1113
1114 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1115                            struct ieee80211_sta *sta, bool set)
1116 {
1117         struct iwl_priv *priv = hw->priv;
1118
1119         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1120
1121         return 0;
1122 }
1123
1124 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1125                     struct ieee80211_vif *vif, u16 queue,
1126                     const struct ieee80211_tx_queue_params *params)
1127 {
1128         struct iwl_priv *priv = hw->priv;
1129         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1130         struct iwl_rxon_context *ctx = vif_priv->ctx;
1131         unsigned long flags;
1132         int q;
1133
1134         if (WARN_ON(!ctx))
1135                 return -EINVAL;
1136
1137         IWL_DEBUG_MAC80211(priv, "enter\n");
1138
1139         if (!iwl_is_ready_rf(priv->shrd)) {
1140                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1141                 return -EIO;
1142         }
1143
1144         if (queue >= AC_NUM) {
1145                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1146                 return 0;
1147         }
1148
1149         q = AC_NUM - 1 - queue;
1150
1151         spin_lock_irqsave(&priv->shrd->lock, flags);
1152
1153         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1154                 cpu_to_le16(params->cw_min);
1155         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1156                 cpu_to_le16(params->cw_max);
1157         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1158         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1159                         cpu_to_le16((params->txop * 32));
1160
1161         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1162
1163         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1164
1165         IWL_DEBUG_MAC80211(priv, "leave\n");
1166         return 0;
1167 }
1168
1169 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1170 {
1171         struct iwl_priv *priv = hw->priv;
1172
1173         return priv->ibss_manager == IWL_IBSS_MANAGER;
1174 }
1175
1176 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1177 {
1178         iwl_connection_init_rx_config(priv, ctx);
1179
1180         iwlagn_set_rxon_chain(priv, ctx);
1181
1182         return iwlagn_commit_rxon(priv, ctx);
1183 }
1184
1185 static int iwl_setup_interface(struct iwl_priv *priv,
1186                                struct iwl_rxon_context *ctx)
1187 {
1188         struct ieee80211_vif *vif = ctx->vif;
1189         int err;
1190
1191         lockdep_assert_held(&priv->shrd->mutex);
1192
1193         /*
1194          * This variable will be correct only when there's just
1195          * a single context, but all code using it is for hardware
1196          * that supports only one context.
1197          */
1198         priv->iw_mode = vif->type;
1199
1200         ctx->is_active = true;
1201
1202         err = iwl_set_mode(priv, ctx);
1203         if (err) {
1204                 if (!ctx->always_active)
1205                         ctx->is_active = false;
1206                 return err;
1207         }
1208
1209         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1210             vif->type == NL80211_IFTYPE_ADHOC) {
1211                 /*
1212                  * pretend to have high BT traffic as long as we
1213                  * are operating in IBSS mode, as this will cause
1214                  * the rate scaling etc. to behave as intended.
1215                  */
1216                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1217         }
1218
1219         return 0;
1220 }
1221
1222 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1223                              struct ieee80211_vif *vif)
1224 {
1225         struct iwl_priv *priv = hw->priv;
1226         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1227         struct iwl_rxon_context *tmp, *ctx = NULL;
1228         int err;
1229         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1230
1231         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1232                            viftype, vif->addr);
1233
1234         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1235
1236         mutex_lock(&priv->shrd->mutex);
1237
1238         iwlagn_disable_roc(priv);
1239
1240         if (!iwl_is_ready_rf(priv->shrd)) {
1241                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1242                 err = -EINVAL;
1243                 goto out;
1244         }
1245
1246         for_each_context(priv, tmp) {
1247                 u32 possible_modes =
1248                         tmp->interface_modes | tmp->exclusive_interface_modes;
1249
1250                 if (tmp->vif) {
1251                         /* check if this busy context is exclusive */
1252                         if (tmp->exclusive_interface_modes &
1253                                                 BIT(tmp->vif->type)) {
1254                                 err = -EINVAL;
1255                                 goto out;
1256                         }
1257                         continue;
1258                 }
1259
1260                 if (!(possible_modes & BIT(viftype)))
1261                         continue;
1262
1263                 /* have maybe usable context w/o interface */
1264                 ctx = tmp;
1265                 break;
1266         }
1267
1268         if (!ctx) {
1269                 err = -EOPNOTSUPP;
1270                 goto out;
1271         }
1272
1273         vif_priv->ctx = ctx;
1274         ctx->vif = vif;
1275
1276         err = iwl_setup_interface(priv, ctx);
1277         if (!err)
1278                 goto out;
1279
1280         ctx->vif = NULL;
1281         priv->iw_mode = NL80211_IFTYPE_STATION;
1282  out:
1283         mutex_unlock(&priv->shrd->mutex);
1284
1285         IWL_DEBUG_MAC80211(priv, "leave\n");
1286         return err;
1287 }
1288
1289 static void iwl_teardown_interface(struct iwl_priv *priv,
1290                                    struct ieee80211_vif *vif,
1291                                    bool mode_change)
1292 {
1293         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1294
1295         lockdep_assert_held(&priv->shrd->mutex);
1296
1297         if (priv->scan_vif == vif) {
1298                 iwl_scan_cancel_timeout(priv, 200);
1299                 iwl_force_scan_end(priv);
1300         }
1301
1302         if (!mode_change) {
1303                 iwl_set_mode(priv, ctx);
1304                 if (!ctx->always_active)
1305                         ctx->is_active = false;
1306         }
1307
1308         /*
1309          * When removing the IBSS interface, overwrite the
1310          * BT traffic load with the stored one from the last
1311          * notification, if any. If this is a device that
1312          * doesn't implement this, this has no effect since
1313          * both values are the same and zero.
1314          */
1315         if (vif->type == NL80211_IFTYPE_ADHOC)
1316                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1317 }
1318
1319 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1320                               struct ieee80211_vif *vif)
1321 {
1322         struct iwl_priv *priv = hw->priv;
1323         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1324
1325         IWL_DEBUG_MAC80211(priv, "enter\n");
1326
1327         mutex_lock(&priv->shrd->mutex);
1328
1329         if (WARN_ON(ctx->vif != vif)) {
1330                 struct iwl_rxon_context *tmp;
1331                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1332                 for_each_context(priv, tmp)
1333                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1334                                 tmp->ctxid, tmp, tmp->vif);
1335         }
1336         ctx->vif = NULL;
1337
1338         iwl_teardown_interface(priv, vif, false);
1339
1340         mutex_unlock(&priv->shrd->mutex);
1341
1342         IWL_DEBUG_MAC80211(priv, "leave\n");
1343
1344 }
1345
1346 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1347                                 struct ieee80211_vif *vif,
1348                                 enum nl80211_iftype newtype, bool newp2p)
1349 {
1350         struct iwl_priv *priv = hw->priv;
1351         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1352         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1353         struct iwl_rxon_context *tmp;
1354         enum nl80211_iftype newviftype = newtype;
1355         u32 interface_modes;
1356         int err;
1357
1358         IWL_DEBUG_MAC80211(priv, "enter\n");
1359
1360         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1361
1362         mutex_lock(&priv->shrd->mutex);
1363
1364         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1365                 /*
1366                  * Huh? But wait ... this can maybe happen when
1367                  * we're in the middle of a firmware restart!
1368                  */
1369                 err = -EBUSY;
1370                 goto out;
1371         }
1372
1373         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1374
1375         if (!(interface_modes & BIT(newtype))) {
1376                 err = -EBUSY;
1377                 goto out;
1378         }
1379
1380         /*
1381          * Refuse a change that should be done by moving from the PAN
1382          * context to the BSS context instead, if the BSS context is
1383          * available and can support the new interface type.
1384          */
1385         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1386             (bss_ctx->interface_modes & BIT(newtype) ||
1387              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1388                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1389                 err = -EBUSY;
1390                 goto out;
1391         }
1392
1393         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1394                 for_each_context(priv, tmp) {
1395                         if (ctx == tmp)
1396                                 continue;
1397
1398                         if (!tmp->vif)
1399                                 continue;
1400
1401                         /*
1402                          * The current mode switch would be exclusive, but
1403                          * another context is active ... refuse the switch.
1404                          */
1405                         err = -EBUSY;
1406                         goto out;
1407                 }
1408         }
1409
1410         /* success */
1411         iwl_teardown_interface(priv, vif, true);
1412         vif->type = newviftype;
1413         vif->p2p = newp2p;
1414         err = iwl_setup_interface(priv, ctx);
1415         WARN_ON(err);
1416         /*
1417          * We've switched internally, but submitting to the
1418          * device may have failed for some reason. Mask this
1419          * error, because otherwise mac80211 will not switch
1420          * (and set the interface type back) and we'll be
1421          * out of sync with it.
1422          */
1423         err = 0;
1424
1425  out:
1426         mutex_unlock(&priv->shrd->mutex);
1427         IWL_DEBUG_MAC80211(priv, "leave\n");
1428
1429         return err;
1430 }
1431
1432 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1433                     struct ieee80211_vif *vif,
1434                     struct cfg80211_scan_request *req)
1435 {
1436         struct iwl_priv *priv = hw->priv;
1437         int ret;
1438
1439         IWL_DEBUG_MAC80211(priv, "enter\n");
1440
1441         if (req->n_channels == 0)
1442                 return -EINVAL;
1443
1444         mutex_lock(&priv->shrd->mutex);
1445
1446         /*
1447          * If an internal scan is in progress, just set
1448          * up the scan_request as per above.
1449          */
1450         if (priv->scan_type != IWL_SCAN_NORMAL) {
1451                 IWL_DEBUG_SCAN(priv,
1452                                "SCAN request during internal scan - defer\n");
1453                 priv->scan_request = req;
1454                 priv->scan_vif = vif;
1455                 ret = 0;
1456         } else {
1457                 priv->scan_request = req;
1458                 priv->scan_vif = vif;
1459                 /*
1460                  * mac80211 will only ask for one band at a time
1461                  * so using channels[0] here is ok
1462                  */
1463                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1464                                         req->channels[0]->band);
1465                 if (ret) {
1466                         priv->scan_request = NULL;
1467                         priv->scan_vif = NULL;
1468                 }
1469         }
1470
1471         IWL_DEBUG_MAC80211(priv, "leave\n");
1472
1473         mutex_unlock(&priv->shrd->mutex);
1474
1475         return ret;
1476 }
1477
1478 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1479                        struct ieee80211_vif *vif,
1480                        struct ieee80211_sta *sta)
1481 {
1482         struct iwl_priv *priv = hw->priv;
1483         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1484         int ret;
1485
1486         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1487                            "station %pM\n", sta->addr);
1488         mutex_lock(&priv->shrd->mutex);
1489         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1490                         sta->addr);
1491         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1492         if (ret)
1493                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1494                         sta->addr);
1495         mutex_unlock(&priv->shrd->mutex);
1496         IWL_DEBUG_MAC80211(priv, "leave\n");
1497
1498         return ret;
1499 }
1500
1501 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1502 {
1503         unsigned long flags;
1504
1505         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1506         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1507         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1508         priv->stations[sta_id].sta.sta.modify_mask = 0;
1509         priv->stations[sta_id].sta.sleep_tx_count = 0;
1510         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1511         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1512         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1513
1514 }
1515
1516 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1517                            struct ieee80211_vif *vif,
1518                            enum sta_notify_cmd cmd,
1519                            struct ieee80211_sta *sta)
1520 {
1521         struct iwl_priv *priv = hw->priv;
1522         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1523         int sta_id;
1524
1525         IWL_DEBUG_MAC80211(priv, "enter\n");
1526
1527         switch (cmd) {
1528         case STA_NOTIFY_SLEEP:
1529                 WARN_ON(!sta_priv->client);
1530                 sta_priv->asleep = true;
1531                 if (atomic_read(&sta_priv->pending_frames) > 0)
1532                         ieee80211_sta_block_awake(hw, sta, true);
1533                 break;
1534         case STA_NOTIFY_AWAKE:
1535                 WARN_ON(!sta_priv->client);
1536                 if (!sta_priv->asleep)
1537                         break;
1538                 sta_priv->asleep = false;
1539                 sta_id = iwl_sta_id(sta);
1540                 if (sta_id != IWL_INVALID_STATION)
1541                         iwl_sta_modify_ps_wake(priv, sta_id);
1542                 break;
1543         default:
1544                 break;
1545         }
1546         IWL_DEBUG_MAC80211(priv, "leave\n");
1547 }
1548
1549 struct ieee80211_ops iwlagn_hw_ops = {
1550         .tx = iwlagn_mac_tx,
1551         .start = iwlagn_mac_start,
1552         .stop = iwlagn_mac_stop,
1553 #ifdef CONFIG_PM_SLEEP
1554         .suspend = iwlagn_mac_suspend,
1555         .resume = iwlagn_mac_resume,
1556 #endif
1557         .add_interface = iwlagn_mac_add_interface,
1558         .remove_interface = iwlagn_mac_remove_interface,
1559         .change_interface = iwlagn_mac_change_interface,
1560         .config = iwlagn_mac_config,
1561         .configure_filter = iwlagn_configure_filter,
1562         .set_key = iwlagn_mac_set_key,
1563         .update_tkip_key = iwlagn_mac_update_tkip_key,
1564         .set_rekey_data = iwlagn_mac_set_rekey_data,
1565         .conf_tx = iwlagn_mac_conf_tx,
1566         .bss_info_changed = iwlagn_bss_info_changed,
1567         .ampdu_action = iwlagn_mac_ampdu_action,
1568         .hw_scan = iwlagn_mac_hw_scan,
1569         .sta_notify = iwlagn_mac_sta_notify,
1570         .sta_add = iwlagn_mac_sta_add,
1571         .sta_remove = iwlagn_mac_sta_remove,
1572         .channel_switch = iwlagn_mac_channel_switch,
1573         .flush = iwlagn_mac_flush,
1574         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1575         .remain_on_channel = iwlagn_mac_remain_on_channel,
1576         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1577         .rssi_callback = iwlagn_mac_rssi_callback,
1578         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1579         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1580         .tx_sync = iwlagn_mac_tx_sync,
1581         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1582         .set_tim = iwlagn_mac_set_tim,
1583 };
1584
1585 /* This function both allocates and initializes hw and priv. */
1586 struct ieee80211_hw *iwl_alloc_all(void)
1587 {
1588         struct iwl_priv *priv;
1589         /* mac80211 allocates memory for this device instance, including
1590          *   space for this driver's private structure */
1591         struct ieee80211_hw *hw;
1592
1593         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1594         if (!hw)
1595                 goto out;
1596
1597         priv = hw->priv;
1598         priv->hw = hw;
1599
1600 out:
1601         return hw;
1602 }