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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-eeprom.h"
  46 #include "iwl-dev.h"
  47 #include "iwl-core.h"
  48 #include "iwl-io.h"
  49 #include "iwl-agn-calib.h"
  50 #include "iwl-agn.h"
  51 #include "iwl-shared.h"
  52 #include "iwl-trans.h"
  53 #include "iwl-op-mode.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_PERIOD |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 151
 152         /*
 153          * Including the following line will crash some AP's.  This
 154          * workaround removes the stimulus which causes the crash until
 155          * the AP software can be fixed.
 156         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 157          */
 158
 159         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 160                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 161
 162         if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
 163                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 164                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 165
 166 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
 167         /* enable 11w if the uCode advertise */
 168         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 169 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
 170                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 171
 172         hw->sta_data_size = sizeof(struct iwl_station_priv);
 173         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 174
 175         for_each_context(priv, ctx) {
 176                 hw->wiphy->interface_modes |= ctx->interface_modes;
 177                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 178         }
 179
 180         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 181
 182         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 183                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 184                 hw->wiphy->n_iface_combinations =
 185                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 186         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 187                 hw->wiphy->iface_combinations =
 188                         iwlagn_iface_combinations_dualmode;
 189                 hw->wiphy->n_iface_combinations =
 190                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 191         }
 192
 193         hw->wiphy->max_remain_on_channel_duration = 1000;
 194
 195         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 196                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 197                             WIPHY_FLAG_IBSS_RSN;
 198
 199         if (priv->fw->ucode_wowlan.code.len &&
 200             trans(priv)->ops->wowlan_suspend &&
 201             device_can_wakeup(trans(priv)->dev)) {
 202                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 203                                           WIPHY_WOWLAN_DISCONNECT |
 204                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 205                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 206                 if (!iwlagn_mod_params.sw_crypto)
 207                         hw->wiphy->wowlan.flags |=
 208                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 209                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 210
 211                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 212                 hw->wiphy->wowlan.pattern_min_len =
 213                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 214                 hw->wiphy->wowlan.pattern_max_len =
 215                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 216         }
 217
 218         if (iwlagn_mod_params.power_save)
 219                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 220         else
 221                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 222
 223         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 224         /* we create the 802.11 header and a zero-length SSID element */
 225         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 226
 227         /* Default value; 4 EDCA QOS priorities */
 228         hw->queues = 4;
 229
 230         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 231
 232         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 233                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 234                         &priv->bands[IEEE80211_BAND_2GHZ];
 235         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 236                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 237                         &priv->bands[IEEE80211_BAND_5GHZ];
 238
 239         hw->wiphy->hw_version = trans(priv)->hw_id;
 240
 241         iwl_leds_init(priv);
 242
 243         ret = ieee80211_register_hw(priv->hw);
 244         if (ret) {
 245                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 246                 return ret;
 247         }
 248         priv->mac80211_registered = 1;
 249
 250         return 0;
 251 }
 252
 253 void iwlagn_mac_unregister(struct iwl_priv *priv)
 254 {
 255         if (!priv->mac80211_registered)
 256                 return;
 257         iwl_leds_exit(priv);
 258         ieee80211_unregister_hw(priv->hw);
 259         priv->mac80211_registered = 0;
 260 }
 261
 262 static int __iwl_up(struct iwl_priv *priv)
 263 {
 264         struct iwl_rxon_context *ctx;
 265         int ret;
 266
 267         lockdep_assert_held(&priv->mutex);
 268
 269         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 270                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 271                 return -EIO;
 272         }
 273
 274         for_each_context(priv, ctx) {
 275                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 276                 if (ret) {
 277                         iwl_dealloc_bcast_stations(priv);
 278                         return ret;
 279                 }
 280         }
 281
 282         ret = iwl_run_init_ucode(priv);
 283         if (ret) {
 284                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 285                 goto error;
 286         }
 287
 288         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 289         if (ret) {
 290                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 291                 goto error;
 292         }
 293
 294         ret = iwl_alive_start(priv);
 295         if (ret)
 296                 goto error;
 297         return 0;
 298
 299  error:
 300         set_bit(STATUS_EXIT_PENDING, &priv->status);
 301         iwl_down(priv);
 302         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 303
 304         IWL_ERR(priv, "Unable to initialize device.\n");
 305         return ret;
 306 }
 307
 308 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 309 {
 310         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 311         int ret;
 312
 313         IWL_DEBUG_MAC80211(priv, "enter\n");
 314
 315         /* we should be verifying the device is ready to be opened */
 316         mutex_lock(&priv->mutex);
 317         ret = __iwl_up(priv);
 318         mutex_unlock(&priv->mutex);
 319         if (ret)
 320                 return ret;
 321
 322         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 323
 324         /* Now we should be done, and the READY bit should be set. */
 325         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 326                 ret = -EIO;
 327
 328         iwlagn_led_enable(priv);
 329
 330         priv->is_open = 1;
 331         IWL_DEBUG_MAC80211(priv, "leave\n");
 332         return 0;
 333 }
 334
 335 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 336 {
 337         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 338
 339         IWL_DEBUG_MAC80211(priv, "enter\n");
 340
 341         if (!priv->is_open)
 342                 return;
 343
 344         priv->is_open = 0;
 345
 346         mutex_lock(&priv->mutex);
 347         iwl_down(priv);
 348         mutex_unlock(&priv->mutex);
 349
 350         iwl_cancel_deferred_work(priv);
 351
 352         flush_workqueue(priv->workqueue);
 353
 354         /* User space software may expect getting rfkill changes
 355          * even if interface is down, trans->down will leave the RF
 356          * kill interrupt enabled
 357          */
 358         iwl_trans_stop_hw(trans(priv));
 359
 360         IWL_DEBUG_MAC80211(priv, "leave\n");
 361 }
 362
 363 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 364                                       struct ieee80211_vif *vif,
 365                                       struct cfg80211_gtk_rekey_data *data)
 366 {
 367         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 368
 369         if (iwlagn_mod_params.sw_crypto)
 370                 return;
 371
 372         IWL_DEBUG_MAC80211(priv, "enter\n");
 373         mutex_lock(&priv->mutex);
 374
 375         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 376                 goto out;
 377
 378         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 379         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 380         priv->replay_ctr =
 381                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 382         priv->have_rekey_data = true;
 383
 384  out:
 385         mutex_unlock(&priv->mutex);
 386         IWL_DEBUG_MAC80211(priv, "leave\n");
 387 }
 388
 389 #ifdef CONFIG_PM_SLEEP
 390
 391 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 392                               struct cfg80211_wowlan *wowlan)
 393 {
 394         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 395         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 396         int ret;
 397
 398         if (WARN_ON(!wowlan))
 399                 return -EINVAL;
 400
 401         IWL_DEBUG_MAC80211(priv, "enter\n");
 402         mutex_lock(&priv->mutex);
 403
 404         /* Don't attempt WoWLAN when not associated, tear down instead. */
 405         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 406             !iwl_is_associated_ctx(ctx)) {
 407                 ret = 1;
 408                 goto out;
 409         }
 410
 411         ret = iwlagn_suspend(priv, wowlan);
 412         if (ret)
 413                 goto error;
 414
 415         device_set_wakeup_enable(trans(priv)->dev, true);
 416
 417         iwl_trans_wowlan_suspend(trans(priv));
 418
 419         goto out;
 420
 421  error:
 422         priv->wowlan = false;
 423         iwlagn_prepare_restart(priv);
 424         ieee80211_restart_hw(priv->hw);
 425  out:
 426         mutex_unlock(&priv->mutex);
 427         IWL_DEBUG_MAC80211(priv, "leave\n");
 428
 429         return ret;
 430 }
 431
 432 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 433 {
 434         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 435         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 436         struct ieee80211_vif *vif;
 437         unsigned long flags;
 438         u32 base, status = 0xffffffff;
 439         int ret = -EIO;
 440
 441         IWL_DEBUG_MAC80211(priv, "enter\n");
 442         mutex_lock(&priv->mutex);
 443
 444         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 445                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 446
 447         base = priv->shrd->device_pointers.error_event_table;
 448         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 449                 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
 450                 ret = iwl_grab_nic_access_silent(trans(priv));
 451                 if (likely(ret == 0)) {
 452                         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
 453                         status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 454                         iwl_release_nic_access(trans(priv));
 455                 }
 456                 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
 457
 458 #ifdef CONFIG_IWLWIFI_DEBUGFS
 459                 if (ret == 0) {
 460                         if (!priv->wowlan_sram)
 461                                 priv->wowlan_sram =
 462                                         kzalloc(priv->fw->ucode_wowlan.data.len,
 463                                                 GFP_KERNEL);
 464
 465                         if (priv->wowlan_sram)
 466                                 _iwl_read_targ_mem_words(
 467                                         trans(priv), 0x800000,
 468                                         priv->wowlan_sram,
 469                                         priv->fw->ucode_wowlan.data.len / 4);
 470                 }
 471 #endif
 472         }
 473
 474         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 475         vif = ctx->vif;
 476
 477         priv->wowlan = false;
 478
 479         device_set_wakeup_enable(trans(priv)->dev, false);
 480
 481         iwlagn_prepare_restart(priv);
 482
 483         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 484         iwl_connection_init_rx_config(priv, ctx);
 485         iwlagn_set_rxon_chain(priv, ctx);
 486
 487         mutex_unlock(&priv->mutex);
 488         IWL_DEBUG_MAC80211(priv, "leave\n");
 489
 490         ieee80211_resume_disconnect(vif);
 491
 492         return 1;
 493 }
 494
 495 #endif
 496
 497 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 498 {
 499         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 500
 501         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 502                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 503
 504         if (iwlagn_tx_skb(priv, skb))
 505                 dev_kfree_skb_any(skb);
 506 }
 507
 508 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 509                                        struct ieee80211_vif *vif,
 510                                        struct ieee80211_key_conf *keyconf,
 511                                        struct ieee80211_sta *sta,
 512                                        u32 iv32, u16 *phase1key)
 513 {
 514         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 515
 516         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 517 }
 518
 519 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 520                               struct ieee80211_vif *vif,
 521                               struct ieee80211_sta *sta,
 522                               struct ieee80211_key_conf *key)
 523 {
 524         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 525         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 526         struct iwl_rxon_context *ctx = vif_priv->ctx;
 527         int ret;
 528         bool is_default_wep_key = false;
 529
 530         IWL_DEBUG_MAC80211(priv, "enter\n");
 531
 532         if (iwlagn_mod_params.sw_crypto) {
 533                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 534                 return -EOPNOTSUPP;
 535         }
 536
 537         switch (key->cipher) {
 538         case WLAN_CIPHER_SUITE_TKIP:
 539                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 540                 /* fall through */
 541         case WLAN_CIPHER_SUITE_CCMP:
 542                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 543                 break;
 544         default:
 545                 break;
 546         }
 547
 548         /*
 549          * We could program these keys into the hardware as well, but we
 550          * don't expect much multicast traffic in IBSS and having keys
 551          * for more stations is probably more useful.
 552          *
 553          * Mark key TX-only and return 0.
 554          */
 555         if (vif->type == NL80211_IFTYPE_ADHOC &&
 556             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 557                 key->hw_key_idx = WEP_INVALID_OFFSET;
 558                 return 0;
 559         }
 560
 561         /* If they key was TX-only, accept deletion */
 562         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 563                 return 0;
 564
 565         mutex_lock(&priv->mutex);
 566         iwl_scan_cancel_timeout(priv, 100);
 567
 568         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 569
 570         /*
 571          * If we are getting WEP group key and we didn't receive any key mapping
 572          * so far, we are in legacy wep mode (group key only), otherwise we are
 573          * in 1X mode.
 574          * In legacy wep mode, we use another host command to the uCode.
 575          */
 576         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 577              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 578                 if (cmd == SET_KEY)
 579                         is_default_wep_key = !ctx->key_mapping_keys;
 580                 else
 581                         is_default_wep_key =
 582                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 583         }
 584
 585
 586         switch (cmd) {
 587         case SET_KEY:
 588                 if (is_default_wep_key) {
 589                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 590                         break;
 591                 }
 592                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 593                 if (ret) {
 594                         /*
 595                          * can't add key for RX, but we don't need it
 596                          * in the device for TX so still return 0
 597                          */
 598                         ret = 0;
 599                         key->hw_key_idx = WEP_INVALID_OFFSET;
 600                 }
 601
 602                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 603                 break;
 604         case DISABLE_KEY:
 605                 if (is_default_wep_key)
 606                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 607                 else
 608                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 609
 610                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 611                 break;
 612         default:
 613                 ret = -EINVAL;
 614         }
 615
 616         mutex_unlock(&priv->mutex);
 617         IWL_DEBUG_MAC80211(priv, "leave\n");
 618
 619         return ret;
 620 }
 621
 622 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 623                                    struct ieee80211_vif *vif,
 624                                    enum ieee80211_ampdu_mlme_action action,
 625                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 626                                    u8 buf_size)
 627 {
 628         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 629         int ret = -EINVAL;
 630         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 631
 632         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 633                      sta->addr, tid);
 634
 635         if (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE))
 636                 return -EACCES;
 637
 638         IWL_DEBUG_MAC80211(priv, "enter\n");
 639         mutex_lock(&priv->mutex);
 640
 641         switch (action) {
 642         case IEEE80211_AMPDU_RX_START:
 643                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 644                         break;
 645                 IWL_DEBUG_HT(priv, "start Rx\n");
 646                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 647                 break;
 648         case IEEE80211_AMPDU_RX_STOP:
 649                 IWL_DEBUG_HT(priv, "stop Rx\n");
 650                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 651                 break;
 652         case IEEE80211_AMPDU_TX_START:
 653                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 654                         break;
 655                 IWL_DEBUG_HT(priv, "start Tx\n");
 656                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 657                 break;
 658         case IEEE80211_AMPDU_TX_STOP:
 659                 IWL_DEBUG_HT(priv, "stop Tx\n");
 660                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 661                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 662                         priv->agg_tids_count--;
 663                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 664                                      priv->agg_tids_count);
 665                 }
 666                 if (!priv->agg_tids_count &&
 667                     hw_params(priv).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->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 = IWL_MAC80211_GET_DVM(hw);
 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;
 695         u8 sta_id;
 696
 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                 return ret;
 712         }
 713
 714         sta_priv->sta_id = sta_id;
 715
 716         return 0;
 717 }
 718
 719 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 720                                  struct ieee80211_vif *vif,
 721                                  struct ieee80211_sta *sta)
 722 {
 723         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 724         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 725         int ret;
 726
 727         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 728
 729         if (vif->type == NL80211_IFTYPE_STATION) {
 730                 /*
 731                  * Station will be removed from device when the RXON
 732                  * is set to unassociated -- just deactivate it here
 733                  * to avoid re-programming it.
 734                  */
 735                 ret = 0;
 736                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 737         } else {
 738                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 739                 if (ret)
 740                         IWL_DEBUG_QUIET_RFKILL(priv,
 741                                 "Error removing station %pM\n", sta->addr);
 742         }
 743         return ret;
 744 }
 745
 746 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 747                                 struct ieee80211_vif *vif,
 748                                 struct ieee80211_sta *sta,
 749                                 enum ieee80211_sta_state old_state,
 750                                 enum ieee80211_sta_state new_state)
 751 {
 752         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 753         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 754         enum {
 755                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 756         } op = NONE;
 757         int ret;
 758
 759         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 760                            sta->addr, old_state, new_state);
 761
 762         mutex_lock(&priv->mutex);
 763         if (vif->type == NL80211_IFTYPE_STATION) {
 764                 if (old_state == IEEE80211_STA_NOTEXIST &&
 765                     new_state == IEEE80211_STA_NONE)
 766                         op = ADD;
 767                 else if (old_state == IEEE80211_STA_NONE &&
 768                          new_state == IEEE80211_STA_NOTEXIST)
 769                         op = REMOVE;
 770                 else if (old_state == IEEE80211_STA_AUTH &&
 771                          new_state == IEEE80211_STA_ASSOC)
 772                         op = HT_RATE_INIT;
 773         } else {
 774                 if (old_state == IEEE80211_STA_AUTH &&
 775                     new_state == IEEE80211_STA_ASSOC)
 776                         op = ADD_RATE_INIT;
 777                 else if (old_state == IEEE80211_STA_ASSOC &&
 778                          new_state == IEEE80211_STA_AUTH)
 779                         op = REMOVE;
 780         }
 781
 782         switch (op) {
 783         case ADD:
 784                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 785                 break;
 786         case REMOVE:
 787                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 788                 break;
 789         case ADD_RATE_INIT:
 790                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 791                 if (ret)
 792                         break;
 793                 /* Initialize rate scaling */
 794                 IWL_DEBUG_INFO(priv,
 795                                "Initializing rate scaling for station %pM\n",
 796                                sta->addr);
 797                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 798                 ret = 0;
 799                 break;
 800         case HT_RATE_INIT:
 801                 /* Initialize rate scaling */
 802                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 803                 if (ret)
 804                         break;
 805                 IWL_DEBUG_INFO(priv,
 806                                "Initializing rate scaling for station %pM\n",
 807                                sta->addr);
 808                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 809                 ret = 0;
 810                 break;
 811         default:
 812                 ret = 0;
 813                 break;
 814         }
 815
 816         /*
 817          * mac80211 might WARN if we fail, but due the way we
 818          * (badly) handle hard rfkill, we might fail here
 819          */
 820         if (iwl_is_rfkill(priv))
 821                 ret = 0;
 822
 823         mutex_unlock(&priv->mutex);
 824         IWL_DEBUG_MAC80211(priv, "leave\n");
 825
 826         return ret;
 827 }
 828
 829 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 830                                 struct ieee80211_channel_switch *ch_switch)
 831 {
 832         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 833         const struct iwl_channel_info *ch_info;
 834         struct ieee80211_conf *conf = &hw->conf;
 835         struct ieee80211_channel *channel = ch_switch->channel;
 836         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 837         /*
 838          * MULTI-FIXME
 839          * When we add support for multiple interfaces, we need to
 840          * revisit this. The channel switch command in the device
 841          * only affects the BSS context, but what does that really
 842          * mean? And what if we get a CSA on the second interface?
 843          * This needs a lot of work.
 844          */
 845         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 846         u16 ch;
 847
 848         IWL_DEBUG_MAC80211(priv, "enter\n");
 849
 850         mutex_lock(&priv->mutex);
 851
 852         if (iwl_is_rfkill(priv))
 853                 goto out;
 854
 855         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 856             test_bit(STATUS_SCANNING, &priv->status) ||
 857             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 858                 goto out;
 859
 860         if (!iwl_is_associated_ctx(ctx))
 861                 goto out;
 862
 863         if (!cfg(priv)->lib->set_channel_switch)
 864                 goto out;
 865
 866         ch = channel->hw_value;
 867         if (le16_to_cpu(ctx->active.channel) == ch)
 868                 goto out;
 869
 870         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 871         if (!is_channel_valid(ch_info)) {
 872                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 873                 goto out;
 874         }
 875
 876         priv->current_ht_config.smps = conf->smps_mode;
 877
 878         /* Configure HT40 channels */
 879         ctx->ht.enabled = conf_is_ht(conf);
 880         if (ctx->ht.enabled)
 881                 iwlagn_config_ht40(conf, ctx);
 882         else
 883                 ctx->ht.is_40mhz = false;
 884
 885         if ((le16_to_cpu(ctx->staging.channel) != ch))
 886                 ctx->staging.flags = 0;
 887
 888         iwl_set_rxon_channel(priv, channel, ctx);
 889         iwl_set_rxon_ht(priv, ht_conf);
 890         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 891
 892         iwl_set_rate(priv);
 893         /*
 894          * at this point, staging_rxon has the
 895          * configuration for channel switch
 896          */
 897         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 898         priv->switch_channel = cpu_to_le16(ch);
 899         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 900                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 901                 priv->switch_channel = 0;
 902                 ieee80211_chswitch_done(ctx->vif, false);
 903         }
 904
 905 out:
 906         mutex_unlock(&priv->mutex);
 907         IWL_DEBUG_MAC80211(priv, "leave\n");
 908 }
 909
 910 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 911                                     unsigned int changed_flags,
 912                                     unsigned int *total_flags,
 913                                     u64 multicast)
 914 {
 915         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 916         __le32 filter_or = 0, filter_nand = 0;
 917         struct iwl_rxon_context *ctx;
 918
 919 #define CHK(test, flag) do { \
 920         if (*total_flags & (test))              \
 921                 filter_or |= (flag);            \
 922         else                                    \
 923                 filter_nand |= (flag);          \
 924         } while (0)
 925
 926         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 927                         changed_flags, *total_flags);
 928
 929         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 930         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 931         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 932         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 933
 934 #undef CHK
 935
 936         mutex_lock(&priv->mutex);
 937
 938         for_each_context(priv, ctx) {
 939                 ctx->staging.filter_flags &= ~filter_nand;
 940                 ctx->staging.filter_flags |= filter_or;
 941
 942                 /*
 943                  * Not committing directly because hardware can perform a scan,
 944                  * but we'll eventually commit the filter flags change anyway.
 945                  */
 946         }
 947
 948         mutex_unlock(&priv->mutex);
 949
 950         /*
 951          * Receiving all multicast frames is always enabled by the
 952          * default flags setup in iwl_connection_init_rx_config()
 953          * since we currently do not support programming multicast
 954          * filters into the device.
 955          */
 956         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 957                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 958 }
 959
 960 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 961 {
 962         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 963
 964         mutex_lock(&priv->mutex);
 965         IWL_DEBUG_MAC80211(priv, "enter\n");
 966
 967         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 968                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 969                 goto done;
 970         }
 971         if (iwl_is_rfkill(priv)) {
 972                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 973                 goto done;
 974         }
 975
 976         /*
 977          * mac80211 will not push any more frames for transmit
 978          * until the flush is completed
 979          */
 980         if (drop) {
 981                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 982                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 983                         IWL_ERR(priv, "flush request fail\n");
 984                         goto done;
 985                 }
 986         }
 987         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 988         iwl_trans_wait_tx_queue_empty(trans(priv));
 989 done:
 990         mutex_unlock(&priv->mutex);
 991         IWL_DEBUG_MAC80211(priv, "leave\n");
 992 }
 993
 994 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 995                                      struct ieee80211_channel *channel,
 996                                      enum nl80211_channel_type channel_type,
 997                                      int duration)
 998 {
 999         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1000         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1001         int err = 0;
1002
1003         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1004                 return -EOPNOTSUPP;
1005
1006         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1007                 return -EOPNOTSUPP;
1008
1009         IWL_DEBUG_MAC80211(priv, "enter\n");
1010         mutex_lock(&priv->mutex);
1011
1012         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1013                 err = -EBUSY;
1014                 goto out;
1015         }
1016
1017         priv->hw_roc_channel = channel;
1018         priv->hw_roc_chantype = channel_type;
1019         /* convert from ms to TU */
1020         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1021         priv->hw_roc_start_notified = false;
1022         cancel_delayed_work(&priv->hw_roc_disable_work);
1023
1024         if (!ctx->is_active) {
1025                 static const struct iwl_qos_info default_qos_data = {
1026                         .def_qos_parm = {
1027                                 .ac[0] = {
1028                                         .cw_min = cpu_to_le16(3),
1029                                         .cw_max = cpu_to_le16(7),
1030                                         .aifsn = 2,
1031                                         .edca_txop = cpu_to_le16(1504),
1032                                 },
1033                                 .ac[1] = {
1034                                         .cw_min = cpu_to_le16(7),
1035                                         .cw_max = cpu_to_le16(15),
1036                                         .aifsn = 2,
1037                                         .edca_txop = cpu_to_le16(3008),
1038                                 },
1039                                 .ac[2] = {
1040                                         .cw_min = cpu_to_le16(15),
1041                                         .cw_max = cpu_to_le16(1023),
1042                                         .aifsn = 3,
1043                                 },
1044                                 .ac[3] = {
1045                                         .cw_min = cpu_to_le16(15),
1046                                         .cw_max = cpu_to_le16(1023),
1047                                         .aifsn = 7,
1048                                 },
1049                         },
1050                 };
1051
1052                 ctx->is_active = true;
1053                 ctx->qos_data = default_qos_data;
1054                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1055                 memcpy(ctx->staging.node_addr,
1056                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1057                        ETH_ALEN);
1058                 memcpy(ctx->staging.bssid_addr,
1059                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1060                        ETH_ALEN);
1061                 err = iwlagn_commit_rxon(priv, ctx);
1062                 if (err)
1063                         goto out;
1064                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1065                                              RXON_FILTER_PROMISC_MSK |
1066                                              RXON_FILTER_CTL2HOST_MSK;
1067
1068                 err = iwlagn_commit_rxon(priv, ctx);
1069                 if (err) {
1070                         iwlagn_disable_roc(priv);
1071                         goto out;
1072                 }
1073                 priv->hw_roc_setup = true;
1074         }
1075
1076         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1077         if (err)
1078                 iwlagn_disable_roc(priv);
1079
1080  out:
1081         mutex_unlock(&priv->mutex);
1082         IWL_DEBUG_MAC80211(priv, "leave\n");
1083
1084         return err;
1085 }
1086
1087 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1088 {
1089         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1090
1091         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1092                 return -EOPNOTSUPP;
1093
1094         IWL_DEBUG_MAC80211(priv, "enter\n");
1095         mutex_lock(&priv->mutex);
1096         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1097         iwlagn_disable_roc(priv);
1098         mutex_unlock(&priv->mutex);
1099         IWL_DEBUG_MAC80211(priv, "leave\n");
1100
1101         return 0;
1102 }
1103
1104 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1105                            enum ieee80211_rssi_event rssi_event)
1106 {
1107         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1108
1109         IWL_DEBUG_MAC80211(priv, "enter\n");
1110         mutex_lock(&priv->mutex);
1111
1112         if (cfg(priv)->bt_params &&
1113                         cfg(priv)->bt_params->advanced_bt_coexist) {
1114                 if (rssi_event == RSSI_EVENT_LOW)
1115                         priv->bt_enable_pspoll = true;
1116                 else if (rssi_event == RSSI_EVENT_HIGH)
1117                         priv->bt_enable_pspoll = false;
1118
1119                 iwlagn_send_advance_bt_config(priv);
1120         } else {
1121                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1122                                 "ignoring RSSI callback\n");
1123         }
1124
1125         mutex_unlock(&priv->mutex);
1126         IWL_DEBUG_MAC80211(priv, "leave\n");
1127 }
1128
1129 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1130                            struct ieee80211_sta *sta, bool set)
1131 {
1132         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1133
1134         queue_work(priv->workqueue, &priv->beacon_update);
1135
1136         return 0;
1137 }
1138
1139 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1140                     struct ieee80211_vif *vif, u16 queue,
1141                     const struct ieee80211_tx_queue_params *params)
1142 {
1143         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1144         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1145         struct iwl_rxon_context *ctx = vif_priv->ctx;
1146         int q;
1147
1148         if (WARN_ON(!ctx))
1149                 return -EINVAL;
1150
1151         IWL_DEBUG_MAC80211(priv, "enter\n");
1152
1153         if (!iwl_is_ready_rf(priv)) {
1154                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1155                 return -EIO;
1156         }
1157
1158         if (queue >= AC_NUM) {
1159                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1160                 return 0;
1161         }
1162
1163         q = AC_NUM - 1 - queue;
1164
1165         mutex_lock(&priv->mutex);
1166
1167         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1168                 cpu_to_le16(params->cw_min);
1169         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1170                 cpu_to_le16(params->cw_max);
1171         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1172         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1173                         cpu_to_le16((params->txop * 32));
1174
1175         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1176
1177         mutex_unlock(&priv->mutex);
1178
1179         IWL_DEBUG_MAC80211(priv, "leave\n");
1180         return 0;
1181 }
1182
1183 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1184 {
1185         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1186
1187         return priv->ibss_manager == IWL_IBSS_MANAGER;
1188 }
1189
1190 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1191 {
1192         iwl_connection_init_rx_config(priv, ctx);
1193
1194         iwlagn_set_rxon_chain(priv, ctx);
1195
1196         return iwlagn_commit_rxon(priv, ctx);
1197 }
1198
1199 static int iwl_setup_interface(struct iwl_priv *priv,
1200                                struct iwl_rxon_context *ctx)
1201 {
1202         struct ieee80211_vif *vif = ctx->vif;
1203         int err;
1204
1205         lockdep_assert_held(&priv->mutex);
1206
1207         /*
1208          * This variable will be correct only when there's just
1209          * a single context, but all code using it is for hardware
1210          * that supports only one context.
1211          */
1212         priv->iw_mode = vif->type;
1213
1214         ctx->is_active = true;
1215
1216         err = iwl_set_mode(priv, ctx);
1217         if (err) {
1218                 if (!ctx->always_active)
1219                         ctx->is_active = false;
1220                 return err;
1221         }
1222
1223         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1224             vif->type == NL80211_IFTYPE_ADHOC) {
1225                 /*
1226                  * pretend to have high BT traffic as long as we
1227                  * are operating in IBSS mode, as this will cause
1228                  * the rate scaling etc. to behave as intended.
1229                  */
1230                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1231         }
1232
1233         return 0;
1234 }
1235
1236 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1237                              struct ieee80211_vif *vif)
1238 {
1239         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1240         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1241         struct iwl_rxon_context *tmp, *ctx = NULL;
1242         int err;
1243         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1244
1245         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1246                            viftype, vif->addr);
1247
1248         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1249
1250         mutex_lock(&priv->mutex);
1251
1252         iwlagn_disable_roc(priv);
1253
1254         if (!iwl_is_ready_rf(priv)) {
1255                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1256                 err = -EINVAL;
1257                 goto out;
1258         }
1259
1260         for_each_context(priv, tmp) {
1261                 u32 possible_modes =
1262                         tmp->interface_modes | tmp->exclusive_interface_modes;
1263
1264                 if (tmp->vif) {
1265                         /* check if this busy context is exclusive */
1266                         if (tmp->exclusive_interface_modes &
1267                                                 BIT(tmp->vif->type)) {
1268                                 err = -EINVAL;
1269                                 goto out;
1270                         }
1271                         continue;
1272                 }
1273
1274                 if (!(possible_modes & BIT(viftype)))
1275                         continue;
1276
1277                 /* have maybe usable context w/o interface */
1278                 ctx = tmp;
1279                 break;
1280         }
1281
1282         if (!ctx) {
1283                 err = -EOPNOTSUPP;
1284                 goto out;
1285         }
1286
1287         vif_priv->ctx = ctx;
1288         ctx->vif = vif;
1289
1290         err = iwl_setup_interface(priv, ctx);
1291         if (!err)
1292                 goto out;
1293
1294         ctx->vif = NULL;
1295         priv->iw_mode = NL80211_IFTYPE_STATION;
1296  out:
1297         mutex_unlock(&priv->mutex);
1298
1299         IWL_DEBUG_MAC80211(priv, "leave\n");
1300         return err;
1301 }
1302
1303 static void iwl_teardown_interface(struct iwl_priv *priv,
1304                                    struct ieee80211_vif *vif,
1305                                    bool mode_change)
1306 {
1307         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1308
1309         lockdep_assert_held(&priv->mutex);
1310
1311         if (priv->scan_vif == vif) {
1312                 iwl_scan_cancel_timeout(priv, 200);
1313                 iwl_force_scan_end(priv);
1314         }
1315
1316         if (!mode_change) {
1317                 iwl_set_mode(priv, ctx);
1318                 if (!ctx->always_active)
1319                         ctx->is_active = false;
1320         }
1321
1322         /*
1323          * When removing the IBSS interface, overwrite the
1324          * BT traffic load with the stored one from the last
1325          * notification, if any. If this is a device that
1326          * doesn't implement this, this has no effect since
1327          * both values are the same and zero.
1328          */
1329         if (vif->type == NL80211_IFTYPE_ADHOC)
1330                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1331 }
1332
1333 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1334                               struct ieee80211_vif *vif)
1335 {
1336         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1337         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1338
1339         IWL_DEBUG_MAC80211(priv, "enter\n");
1340
1341         mutex_lock(&priv->mutex);
1342
1343         if (WARN_ON(ctx->vif != vif)) {
1344                 struct iwl_rxon_context *tmp;
1345                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1346                 for_each_context(priv, tmp)
1347                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1348                                 tmp->ctxid, tmp, tmp->vif);
1349         }
1350         ctx->vif = NULL;
1351
1352         iwl_teardown_interface(priv, vif, false);
1353
1354         mutex_unlock(&priv->mutex);
1355
1356         IWL_DEBUG_MAC80211(priv, "leave\n");
1357
1358 }
1359
1360 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1361                                 struct ieee80211_vif *vif,
1362                                 enum nl80211_iftype newtype, bool newp2p)
1363 {
1364         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1365         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1366         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1367         struct iwl_rxon_context *tmp;
1368         enum nl80211_iftype newviftype = newtype;
1369         u32 interface_modes;
1370         int err;
1371
1372         IWL_DEBUG_MAC80211(priv, "enter\n");
1373
1374         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1375
1376         mutex_lock(&priv->mutex);
1377
1378         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1379                 /*
1380                  * Huh? But wait ... this can maybe happen when
1381                  * we're in the middle of a firmware restart!
1382                  */
1383                 err = -EBUSY;
1384                 goto out;
1385         }
1386
1387         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1388
1389         if (!(interface_modes & BIT(newtype))) {
1390                 err = -EBUSY;
1391                 goto out;
1392         }
1393
1394         /*
1395          * Refuse a change that should be done by moving from the PAN
1396          * context to the BSS context instead, if the BSS context is
1397          * available and can support the new interface type.
1398          */
1399         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1400             (bss_ctx->interface_modes & BIT(newtype) ||
1401              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1402                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1403                 err = -EBUSY;
1404                 goto out;
1405         }
1406
1407         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1408                 for_each_context(priv, tmp) {
1409                         if (ctx == tmp)
1410                                 continue;
1411
1412                         if (!tmp->vif)
1413                                 continue;
1414
1415                         /*
1416                          * The current mode switch would be exclusive, but
1417                          * another context is active ... refuse the switch.
1418                          */
1419                         err = -EBUSY;
1420                         goto out;
1421                 }
1422         }
1423
1424         /* success */
1425         iwl_teardown_interface(priv, vif, true);
1426         vif->type = newviftype;
1427         vif->p2p = newp2p;
1428         err = iwl_setup_interface(priv, ctx);
1429         WARN_ON(err);
1430         /*
1431          * We've switched internally, but submitting to the
1432          * device may have failed for some reason. Mask this
1433          * error, because otherwise mac80211 will not switch
1434          * (and set the interface type back) and we'll be
1435          * out of sync with it.
1436          */
1437         err = 0;
1438
1439  out:
1440         mutex_unlock(&priv->mutex);
1441         IWL_DEBUG_MAC80211(priv, "leave\n");
1442
1443         return err;
1444 }
1445
1446 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1447                     struct ieee80211_vif *vif,
1448                     struct cfg80211_scan_request *req)
1449 {
1450         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1451         int ret;
1452
1453         IWL_DEBUG_MAC80211(priv, "enter\n");
1454
1455         if (req->n_channels == 0)
1456                 return -EINVAL;
1457
1458         mutex_lock(&priv->mutex);
1459
1460         /*
1461          * If an internal scan is in progress, just set
1462          * up the scan_request as per above.
1463          */
1464         if (priv->scan_type != IWL_SCAN_NORMAL) {
1465                 IWL_DEBUG_SCAN(priv,
1466                                "SCAN request during internal scan - defer\n");
1467                 priv->scan_request = req;
1468                 priv->scan_vif = vif;
1469                 ret = 0;
1470         } else {
1471                 priv->scan_request = req;
1472                 priv->scan_vif = vif;
1473                 /*
1474                  * mac80211 will only ask for one band at a time
1475                  * so using channels[0] here is ok
1476                  */
1477                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1478                                         req->channels[0]->band);
1479                 if (ret) {
1480                         priv->scan_request = NULL;
1481                         priv->scan_vif = NULL;
1482                 }
1483         }
1484
1485         IWL_DEBUG_MAC80211(priv, "leave\n");
1486
1487         mutex_unlock(&priv->mutex);
1488
1489         return ret;
1490 }
1491
1492 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1493 {
1494         struct iwl_addsta_cmd cmd = {
1495                 .mode = STA_CONTROL_MODIFY_MSK,
1496                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1497                 .sta.sta_id = sta_id,
1498         };
1499
1500         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1501 }
1502
1503 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1504                            struct ieee80211_vif *vif,
1505                            enum sta_notify_cmd cmd,
1506                            struct ieee80211_sta *sta)
1507 {
1508         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1509         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1510         int sta_id;
1511
1512         IWL_DEBUG_MAC80211(priv, "enter\n");
1513
1514         switch (cmd) {
1515         case STA_NOTIFY_SLEEP:
1516                 WARN_ON(!sta_priv->client);
1517                 sta_priv->asleep = true;
1518                 if (atomic_read(&sta_priv->pending_frames) > 0)
1519                         ieee80211_sta_block_awake(hw, sta, true);
1520                 break;
1521         case STA_NOTIFY_AWAKE:
1522                 WARN_ON(!sta_priv->client);
1523                 if (!sta_priv->asleep)
1524                         break;
1525                 sta_priv->asleep = false;
1526                 sta_id = iwl_sta_id(sta);
1527                 if (sta_id != IWL_INVALID_STATION)
1528                         iwl_sta_modify_ps_wake(priv, sta_id);
1529                 break;
1530         default:
1531                 break;
1532         }
1533         IWL_DEBUG_MAC80211(priv, "leave\n");
1534 }
1535
1536 struct ieee80211_ops iwlagn_hw_ops = {
1537         .tx = iwlagn_mac_tx,
1538         .start = iwlagn_mac_start,
1539         .stop = iwlagn_mac_stop,
1540 #ifdef CONFIG_PM_SLEEP
1541         .suspend = iwlagn_mac_suspend,
1542         .resume = iwlagn_mac_resume,
1543 #endif
1544         .add_interface = iwlagn_mac_add_interface,
1545         .remove_interface = iwlagn_mac_remove_interface,
1546         .change_interface = iwlagn_mac_change_interface,
1547         .config = iwlagn_mac_config,
1548         .configure_filter = iwlagn_configure_filter,
1549         .set_key = iwlagn_mac_set_key,
1550         .update_tkip_key = iwlagn_mac_update_tkip_key,
1551         .set_rekey_data = iwlagn_mac_set_rekey_data,
1552         .conf_tx = iwlagn_mac_conf_tx,
1553         .bss_info_changed = iwlagn_bss_info_changed,
1554         .ampdu_action = iwlagn_mac_ampdu_action,
1555         .hw_scan = iwlagn_mac_hw_scan,
1556         .sta_notify = iwlagn_mac_sta_notify,
1557         .sta_state = iwlagn_mac_sta_state,
1558         .channel_switch = iwlagn_mac_channel_switch,
1559         .flush = iwlagn_mac_flush,
1560         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1561         .remain_on_channel = iwlagn_mac_remain_on_channel,
1562         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1563         .rssi_callback = iwlagn_mac_rssi_callback,
1564         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1565         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1566         .set_tim = iwlagn_mac_set_tim,
1567 };
1568
1569 /* This function both allocates and initializes hw and priv. */
1570 struct ieee80211_hw *iwl_alloc_all(void)
1571 {
1572         struct iwl_priv *priv;
1573         struct iwl_op_mode *op_mode;
1574         /* mac80211 allocates memory for this device instance, including
1575          *   space for this driver's private structure */
1576         struct ieee80211_hw *hw;
1577
1578         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1579                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1580         if (!hw)
1581                 goto out;
1582
1583         op_mode = hw->priv;
1584         priv = IWL_OP_MODE_GET_DVM(op_mode);
1585         priv->hw = hw;
1586
1587 out:
1588         return hw;
1589 }