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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/firmware.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/if_arp.h>
  41
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-eeprom.h"
  47 #include "iwl-dev.h"
  48 #include "iwl-core.h"
  49 #include "iwl-io.h"
  50 #include "iwl-agn-calib.h"
  51 #include "iwl-agn.h"
  52 #include "iwl-shared.h"
  53 #include "iwl-bus.h"
  54 #include "iwl-trans.h"
  55
  56 /*****************************************************************************
  57  *
  58  * mac80211 entry point functions
  59  *
  60  *****************************************************************************/
  61
  62 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  63         {
  64                 .max = 1,
  65                 .types = BIT(NL80211_IFTYPE_STATION),
  66         },
  67         {
  68                 .max = 1,
  69                 .types = BIT(NL80211_IFTYPE_AP),
  70         },
  71 };
  72
  73 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  74         {
  75                 .max = 2,
  76                 .types = BIT(NL80211_IFTYPE_STATION),
  77         },
  78 };
  79
  80 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  81         {
  82                 .max = 1,
  83                 .types = BIT(NL80211_IFTYPE_STATION),
  84         },
  85         {
  86                 .max = 1,
  87                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  88                          BIT(NL80211_IFTYPE_AP),
  89         },
  90 };
  91
  92 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  93         {
  94                 .max = 2,
  95                 .types = BIT(NL80211_IFTYPE_STATION),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination
 104 iwlagn_iface_combinations_dualmode[] = {
 105         { .num_different_channels = 1,
 106           .max_interfaces = 2,
 107           .beacon_int_infra_match = true,
 108           .limits = iwlagn_sta_ap_limits,
 109           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 110         },
 111         { .num_different_channels = 1,
 112           .max_interfaces = 2,
 113           .limits = iwlagn_2sta_limits,
 114           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 115         },
 116 };
 117
 118 static const struct ieee80211_iface_combination
 119 iwlagn_iface_combinations_p2p[] = {
 120         { .num_different_channels = 1,
 121           .max_interfaces = 2,
 122           .beacon_int_infra_match = true,
 123           .limits = iwlagn_p2p_sta_go_limits,
 124           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 125         },
 126         { .num_different_channels = 1,
 127           .max_interfaces = 2,
 128           .limits = iwlagn_p2p_2sta_limits,
 129           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 130         },
 131 };
 132
 133 /*
 134  * Not a mac80211 entry point function, but it fits in with all the
 135  * other mac80211 functions grouped here.
 136  */
 137 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 138                                   struct iwlagn_ucode_capabilities *capa)
 139 {
 140         int ret;
 141         struct ieee80211_hw *hw = priv->hw;
 142         struct iwl_rxon_context *ctx;
 143
 144         hw->rate_control_algorithm = "iwl-agn-rs";
 145
 146         /* Tell mac80211 our characteristics */
 147         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 148                     IEEE80211_HW_AMPDU_AGGREGATION |
 149                     IEEE80211_HW_NEED_DTIM_PERIOD |
 150                     IEEE80211_HW_SPECTRUM_MGMT |
 151                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 152
 153         /*
 154          * Including the following line will crash some AP's.  This
 155          * workaround removes the stimulus which causes the crash until
 156          * the AP software can be fixed.
 157         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 158          */
 159
 160         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 161                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 162
 163         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 164                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 165                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 166
 167         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 168                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 169
 170         hw->sta_data_size = sizeof(struct iwl_station_priv);
 171         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 172
 173         for_each_context(priv, ctx) {
 174                 hw->wiphy->interface_modes |= ctx->interface_modes;
 175                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 176         }
 177
 178         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 179
 180         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 181                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 182                 hw->wiphy->n_iface_combinations =
 183                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 184         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 185                 hw->wiphy->iface_combinations =
 186                         iwlagn_iface_combinations_dualmode;
 187                 hw->wiphy->n_iface_combinations =
 188                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 189         }
 190
 191         hw->wiphy->max_remain_on_channel_duration = 1000;
 192
 193         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 194                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 195                             WIPHY_FLAG_IBSS_RSN;
 196
 197         if (trans(priv)->ucode_wowlan.code.len &&
 198             device_can_wakeup(bus(priv)->dev)) {
 199                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 200                                           WIPHY_WOWLAN_DISCONNECT |
 201                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 202                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 203                 if (!iwlagn_mod_params.sw_crypto)
 204                         hw->wiphy->wowlan.flags |=
 205                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 206                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 207
 208                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 209                 hw->wiphy->wowlan.pattern_min_len =
 210                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 211                 hw->wiphy->wowlan.pattern_max_len =
 212                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 213         }
 214
 215         if (iwlagn_mod_params.power_save)
 216                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 217         else
 218                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 219
 220         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 221         /* we create the 802.11 header and a zero-length SSID element */
 222         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 223
 224         /* Default value; 4 EDCA QOS priorities */
 225         hw->queues = 4;
 226
 227         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 228
 229         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 230                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 231                         &priv->bands[IEEE80211_BAND_2GHZ];
 232         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 233                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 234                         &priv->bands[IEEE80211_BAND_5GHZ];
 235
 236         iwl_leds_init(priv);
 237
 238         ret = ieee80211_register_hw(priv->hw);
 239         if (ret) {
 240                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 241                 return ret;
 242         }
 243         priv->mac80211_registered = 1;
 244
 245         return 0;
 246 }
 247
 248 static int __iwl_up(struct iwl_priv *priv)
 249 {
 250         struct iwl_rxon_context *ctx;
 251         int ret;
 252
 253         lockdep_assert_held(&priv->shrd->mutex);
 254
 255         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 256                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 257                 return -EIO;
 258         }
 259
 260         for_each_context(priv, ctx) {
 261                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 262                 if (ret) {
 263                         iwl_dealloc_bcast_stations(priv);
 264                         return ret;
 265                 }
 266         }
 267
 268         ret = iwlagn_run_init_ucode(priv);
 269         if (ret) {
 270                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 271                 goto error;
 272         }
 273
 274         ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 275         if (ret) {
 276                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 277                 goto error;
 278         }
 279
 280         ret = iwl_alive_start(priv);
 281         if (ret)
 282                 goto error;
 283         return 0;
 284
 285  error:
 286         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 287         __iwl_down(priv);
 288         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 289
 290         IWL_ERR(priv, "Unable to initialize device.\n");
 291         return ret;
 292 }
 293
 294 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 295 {
 296         struct iwl_priv *priv = hw->priv;
 297         int ret;
 298
 299         IWL_DEBUG_MAC80211(priv, "enter\n");
 300
 301         /* we should be verifying the device is ready to be opened */
 302         mutex_lock(&priv->shrd->mutex);
 303         ret = __iwl_up(priv);
 304         mutex_unlock(&priv->shrd->mutex);
 305         if (ret)
 306                 return ret;
 307
 308         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 309
 310         /* Now we should be done, and the READY bit should be set. */
 311         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 312                 ret = -EIO;
 313
 314         iwlagn_led_enable(priv);
 315
 316         priv->is_open = 1;
 317         IWL_DEBUG_MAC80211(priv, "leave\n");
 318         return 0;
 319 }
 320
 321 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 322 {
 323         struct iwl_priv *priv = hw->priv;
 324
 325         IWL_DEBUG_MAC80211(priv, "enter\n");
 326
 327         if (!priv->is_open)
 328                 return;
 329
 330         priv->is_open = 0;
 331
 332         iwl_down(priv);
 333
 334         flush_workqueue(priv->shrd->workqueue);
 335
 336         /* User space software may expect getting rfkill changes
 337          * even if interface is down */
 338         iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
 339         iwl_enable_rfkill_int(priv);
 340
 341         IWL_DEBUG_MAC80211(priv, "leave\n");
 342 }
 343
 344 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 345                                       struct ieee80211_vif *vif,
 346                                       struct cfg80211_gtk_rekey_data *data)
 347 {
 348         struct iwl_priv *priv = hw->priv;
 349
 350         if (iwlagn_mod_params.sw_crypto)
 351                 return;
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354         mutex_lock(&priv->shrd->mutex);
 355
 356         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 357                 goto out;
 358
 359         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 360         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 361         priv->replay_ctr =
 362                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 363         priv->have_rekey_data = true;
 364
 365  out:
 366         mutex_unlock(&priv->shrd->mutex);
 367         IWL_DEBUG_MAC80211(priv, "leave\n");
 368 }
 369
 370 #ifdef CONFIG_PM_SLEEP
 371
 372 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 373                               struct cfg80211_wowlan *wowlan)
 374 {
 375         struct iwl_priv *priv = hw->priv;
 376         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 377         int ret;
 378
 379         if (WARN_ON(!wowlan))
 380                 return -EINVAL;
 381
 382         IWL_DEBUG_MAC80211(priv, "enter\n");
 383         mutex_lock(&priv->shrd->mutex);
 384
 385         /* Don't attempt WoWLAN when not associated, tear down instead. */
 386         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 387             !iwl_is_associated_ctx(ctx)) {
 388                 ret = 1;
 389                 goto out;
 390         }
 391
 392         ret = iwlagn_suspend(priv, hw, wowlan);
 393         if (ret)
 394                 goto error;
 395
 396         device_set_wakeup_enable(bus(priv)->dev, true);
 397
 398         /* Now let the ucode operate on its own */
 399         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 400                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 401
 402         goto out;
 403
 404  error:
 405         priv->shrd->wowlan = false;
 406         iwlagn_prepare_restart(priv);
 407         ieee80211_restart_hw(priv->hw);
 408  out:
 409         mutex_unlock(&priv->shrd->mutex);
 410         IWL_DEBUG_MAC80211(priv, "leave\n");
 411
 412         return ret;
 413 }
 414
 415 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 416 {
 417         struct iwl_priv *priv = hw->priv;
 418         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 419         struct ieee80211_vif *vif;
 420         unsigned long flags;
 421         u32 base, status = 0xffffffff;
 422         int ret = -EIO;
 423
 424         IWL_DEBUG_MAC80211(priv, "enter\n");
 425         mutex_lock(&priv->shrd->mutex);
 426
 427         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 428                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 429
 430         base = priv->shrd->device_pointers.error_event_table;
 431         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 432                 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
 433                 ret = iwl_grab_nic_access_silent(bus(priv));
 434                 if (ret == 0) {
 435                         iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
 436                         status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
 437                         iwl_release_nic_access(bus(priv));
 438                 }
 439                 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
 440
 441 #ifdef CONFIG_IWLWIFI_DEBUGFS
 442                 if (ret == 0) {
 443                         struct iwl_trans *trans = trans(priv);
 444                         if (!priv->wowlan_sram)
 445                                 priv->wowlan_sram =
 446                                         kzalloc(trans->ucode_wowlan.data.len,
 447                                                 GFP_KERNEL);
 448
 449                         if (priv->wowlan_sram)
 450                                 _iwl_read_targ_mem_words(
 451                                         bus(priv), 0x800000, priv->wowlan_sram,
 452                                         trans->ucode_wowlan.data.len / 4);
 453                 }
 454 #endif
 455         }
 456
 457         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 458         vif = ctx->vif;
 459
 460         priv->shrd->wowlan = false;
 461
 462         device_set_wakeup_enable(bus(priv)->dev, false);
 463
 464         iwlagn_prepare_restart(priv);
 465
 466         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 467         iwl_connection_init_rx_config(priv, ctx);
 468         iwlagn_set_rxon_chain(priv, ctx);
 469
 470         mutex_unlock(&priv->shrd->mutex);
 471         IWL_DEBUG_MAC80211(priv, "leave\n");
 472
 473         ieee80211_resume_disconnect(vif);
 474
 475         return 1;
 476 }
 477
 478 #endif
 479
 480 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 481 {
 482         struct iwl_priv *priv = hw->priv;
 483
 484         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 485                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 486
 487         if (iwlagn_tx_skb(priv, skb))
 488                 dev_kfree_skb_any(skb);
 489 }
 490
 491 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 492                                        struct ieee80211_vif *vif,
 493                                        struct ieee80211_key_conf *keyconf,
 494                                        struct ieee80211_sta *sta,
 495                                        u32 iv32, u16 *phase1key)
 496 {
 497         struct iwl_priv *priv = hw->priv;
 498
 499         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 500 }
 501
 502 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 503                               struct ieee80211_vif *vif,
 504                               struct ieee80211_sta *sta,
 505                               struct ieee80211_key_conf *key)
 506 {
 507         struct iwl_priv *priv = hw->priv;
 508         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 509         struct iwl_rxon_context *ctx = vif_priv->ctx;
 510         int ret;
 511         bool is_default_wep_key = false;
 512
 513         IWL_DEBUG_MAC80211(priv, "enter\n");
 514
 515         if (iwlagn_mod_params.sw_crypto) {
 516                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 517                 return -EOPNOTSUPP;
 518         }
 519
 520         switch (key->cipher) {
 521         case WLAN_CIPHER_SUITE_TKIP:
 522                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 523                 /* fall through */
 524         case WLAN_CIPHER_SUITE_CCMP:
 525                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 526                 break;
 527         default:
 528                 break;
 529         }
 530
 531         /*
 532          * We could program these keys into the hardware as well, but we
 533          * don't expect much multicast traffic in IBSS and having keys
 534          * for more stations is probably more useful.
 535          *
 536          * Mark key TX-only and return 0.
 537          */
 538         if (vif->type == NL80211_IFTYPE_ADHOC &&
 539             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 540                 key->hw_key_idx = WEP_INVALID_OFFSET;
 541                 return 0;
 542         }
 543
 544         /* If they key was TX-only, accept deletion */
 545         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 546                 return 0;
 547
 548         mutex_lock(&priv->shrd->mutex);
 549         iwl_scan_cancel_timeout(priv, 100);
 550
 551         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 552
 553         /*
 554          * If we are getting WEP group key and we didn't receive any key mapping
 555          * so far, we are in legacy wep mode (group key only), otherwise we are
 556          * in 1X mode.
 557          * In legacy wep mode, we use another host command to the uCode.
 558          */
 559         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 560              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 561                 if (cmd == SET_KEY)
 562                         is_default_wep_key = !ctx->key_mapping_keys;
 563                 else
 564                         is_default_wep_key =
 565                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 566         }
 567
 568
 569         switch (cmd) {
 570         case SET_KEY:
 571                 if (is_default_wep_key) {
 572                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 573                         break;
 574                 }
 575                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 576                 if (ret) {
 577                         /*
 578                          * can't add key for RX, but we don't need it
 579                          * in the device for TX so still return 0
 580                          */
 581                         ret = 0;
 582                         key->hw_key_idx = WEP_INVALID_OFFSET;
 583                 }
 584
 585                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 586                 break;
 587         case DISABLE_KEY:
 588                 if (is_default_wep_key)
 589                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 590                 else
 591                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 592
 593                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 594                 break;
 595         default:
 596                 ret = -EINVAL;
 597         }
 598
 599         mutex_unlock(&priv->shrd->mutex);
 600         IWL_DEBUG_MAC80211(priv, "leave\n");
 601
 602         return ret;
 603 }
 604
 605 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 606                                    struct ieee80211_vif *vif,
 607                                    enum ieee80211_ampdu_mlme_action action,
 608                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 609                                    u8 buf_size)
 610 {
 611         struct iwl_priv *priv = hw->priv;
 612         int ret = -EINVAL;
 613         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 614         struct iwl_rxon_context *ctx =  iwl_rxon_ctx_from_vif(vif);
 615
 616         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 617                      sta->addr, tid);
 618
 619         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
 620                 return -EACCES;
 621
 622         IWL_DEBUG_MAC80211(priv, "enter\n");
 623         mutex_lock(&priv->shrd->mutex);
 624
 625         switch (action) {
 626         case IEEE80211_AMPDU_RX_START:
 627                 IWL_DEBUG_HT(priv, "start Rx\n");
 628                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 629                 break;
 630         case IEEE80211_AMPDU_RX_STOP:
 631                 IWL_DEBUG_HT(priv, "stop Rx\n");
 632                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 633                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 634                         ret = 0;
 635                 break;
 636         case IEEE80211_AMPDU_TX_START:
 637                 IWL_DEBUG_HT(priv, "start Tx\n");
 638                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 639                 break;
 640         case IEEE80211_AMPDU_TX_STOP:
 641                 IWL_DEBUG_HT(priv, "stop Tx\n");
 642                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 643                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 644                         priv->agg_tids_count--;
 645                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 646                                      priv->agg_tids_count);
 647                 }
 648                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 649                         ret = 0;
 650                 if (!priv->agg_tids_count && priv->cfg->ht_params &&
 651                     priv->cfg->ht_params->use_rts_for_aggregation) {
 652                         /*
 653                          * switch off RTS/CTS if it was previously enabled
 654                          */
 655                         sta_priv->lq_sta.lq.general_params.flags &=
 656                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 657                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 658                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 659                 }
 660                 break;
 661         case IEEE80211_AMPDU_TX_OPERATIONAL:
 662                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 663
 664                 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, iwl_sta_id(sta),
 665                                 tid, buf_size);
 666
 667                 /*
 668                  * If the limit is 0, then it wasn't initialised yet,
 669                  * use the default. We can do that since we take the
 670                  * minimum below, and we don't want to go above our
 671                  * default due to hardware restrictions.
 672                  */
 673                 if (sta_priv->max_agg_bufsize == 0)
 674                         sta_priv->max_agg_bufsize =
 675                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 676
 677                 /*
 678                  * Even though in theory the peer could have different
 679                  * aggregation reorder buffer sizes for different sessions,
 680                  * our ucode doesn't allow for that and has a global limit
 681                  * for each station. Therefore, use the minimum of all the
 682                  * aggregation sessions and our default value.
 683                  */
 684                 sta_priv->max_agg_bufsize =
 685                         min(sta_priv->max_agg_bufsize, buf_size);
 686
 687                 if (priv->cfg->ht_params &&
 688                     priv->cfg->ht_params->use_rts_for_aggregation) {
 689                         /*
 690                          * switch to RTS/CTS if it is the prefer protection
 691                          * method for HT traffic
 692                          */
 693
 694                         sta_priv->lq_sta.lq.general_params.flags |=
 695                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 696                 }
 697                 priv->agg_tids_count++;
 698                 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 699                              priv->agg_tids_count);
 700
 701                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 702                         sta_priv->max_agg_bufsize;
 703
 704                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 705                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 706
 707                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 708                          sta->addr, tid);
 709                 ret = 0;
 710                 break;
 711         }
 712         mutex_unlock(&priv->shrd->mutex);
 713         IWL_DEBUG_MAC80211(priv, "leave\n");
 714         return ret;
 715 }
 716
 717 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 718                               struct ieee80211_vif *vif,
 719                               struct ieee80211_sta *sta)
 720 {
 721         struct iwl_priv *priv = hw->priv;
 722         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 723         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 724         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 725         int ret = 0;
 726         u8 sta_id;
 727
 728         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
 729                         sta->addr);
 730         mutex_lock(&priv->shrd->mutex);
 731         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 732                         sta->addr);
 733         sta_priv->sta_id = IWL_INVALID_STATION;
 734
 735         atomic_set(&sta_priv->pending_frames, 0);
 736         if (vif->type == NL80211_IFTYPE_AP)
 737                 sta_priv->client = true;
 738
 739         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 740                                      is_ap, sta, &sta_id);
 741         if (ret) {
 742                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 743                         sta->addr, ret);
 744                 /* Should we return success if return code is EEXIST ? */
 745                 goto out;
 746         }
 747
 748         sta_priv->sta_id = sta_id;
 749
 750         /* Initialize rate scaling */
 751         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
 752                        sta->addr);
 753         iwl_rs_rate_init(priv, sta, sta_id);
 754  out:
 755         mutex_unlock(&priv->shrd->mutex);
 756         IWL_DEBUG_MAC80211(priv, "leave\n");
 757
 758         return ret;
 759 }
 760
 761 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 762                                 struct ieee80211_channel_switch *ch_switch)
 763 {
 764         struct iwl_priv *priv = hw->priv;
 765         const struct iwl_channel_info *ch_info;
 766         struct ieee80211_conf *conf = &hw->conf;
 767         struct ieee80211_channel *channel = ch_switch->channel;
 768         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 769         /*
 770          * MULTI-FIXME
 771          * When we add support for multiple interfaces, we need to
 772          * revisit this. The channel switch command in the device
 773          * only affects the BSS context, but what does that really
 774          * mean? And what if we get a CSA on the second interface?
 775          * This needs a lot of work.
 776          */
 777         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 778         u16 ch;
 779
 780         IWL_DEBUG_MAC80211(priv, "enter\n");
 781
 782         mutex_lock(&priv->shrd->mutex);
 783
 784         if (iwl_is_rfkill(priv->shrd))
 785                 goto out;
 786
 787         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 788             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 789             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 790                 goto out;
 791
 792         if (!iwl_is_associated_ctx(ctx))
 793                 goto out;
 794
 795         if (!priv->cfg->lib->set_channel_switch)
 796                 goto out;
 797
 798         ch = channel->hw_value;
 799         if (le16_to_cpu(ctx->active.channel) == ch)
 800                 goto out;
 801
 802         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 803         if (!is_channel_valid(ch_info)) {
 804                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 805                 goto out;
 806         }
 807
 808         spin_lock_irq(&priv->shrd->lock);
 809
 810         priv->current_ht_config.smps = conf->smps_mode;
 811
 812         /* Configure HT40 channels */
 813         ctx->ht.enabled = conf_is_ht(conf);
 814         if (ctx->ht.enabled)
 815                 iwlagn_config_ht40(conf, ctx);
 816         else
 817                 ctx->ht.is_40mhz = false;
 818
 819         if ((le16_to_cpu(ctx->staging.channel) != ch))
 820                 ctx->staging.flags = 0;
 821
 822         iwl_set_rxon_channel(priv, channel, ctx);
 823         iwl_set_rxon_ht(priv, ht_conf);
 824         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 825
 826         spin_unlock_irq(&priv->shrd->lock);
 827
 828         iwl_set_rate(priv);
 829         /*
 830          * at this point, staging_rxon has the
 831          * configuration for channel switch
 832          */
 833         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 834         priv->switch_channel = cpu_to_le16(ch);
 835         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
 836                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 837                 priv->switch_channel = 0;
 838                 ieee80211_chswitch_done(ctx->vif, false);
 839         }
 840
 841 out:
 842         mutex_unlock(&priv->shrd->mutex);
 843         IWL_DEBUG_MAC80211(priv, "leave\n");
 844 }
 845
 846 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 847                                     unsigned int changed_flags,
 848                                     unsigned int *total_flags,
 849                                     u64 multicast)
 850 {
 851         struct iwl_priv *priv = hw->priv;
 852         __le32 filter_or = 0, filter_nand = 0;
 853         struct iwl_rxon_context *ctx;
 854
 855 #define CHK(test, flag) do { \
 856         if (*total_flags & (test))              \
 857                 filter_or |= (flag);            \
 858         else                                    \
 859                 filter_nand |= (flag);          \
 860         } while (0)
 861
 862         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 863                         changed_flags, *total_flags);
 864
 865         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 866         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 867         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 868         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 869
 870 #undef CHK
 871
 872         mutex_lock(&priv->shrd->mutex);
 873
 874         for_each_context(priv, ctx) {
 875                 ctx->staging.filter_flags &= ~filter_nand;
 876                 ctx->staging.filter_flags |= filter_or;
 877
 878                 /*
 879                  * Not committing directly because hardware can perform a scan,
 880                  * but we'll eventually commit the filter flags change anyway.
 881                  */
 882         }
 883
 884         mutex_unlock(&priv->shrd->mutex);
 885
 886         /*
 887          * Receiving all multicast frames is always enabled by the
 888          * default flags setup in iwl_connection_init_rx_config()
 889          * since we currently do not support programming multicast
 890          * filters into the device.
 891          */
 892         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 893                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 894 }
 895
 896 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 897 {
 898         struct iwl_priv *priv = hw->priv;
 899
 900         mutex_lock(&priv->shrd->mutex);
 901         IWL_DEBUG_MAC80211(priv, "enter\n");
 902
 903         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 904                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 905                 goto done;
 906         }
 907         if (iwl_is_rfkill(priv->shrd)) {
 908                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 909                 goto done;
 910         }
 911
 912         /*
 913          * mac80211 will not push any more frames for transmit
 914          * until the flush is completed
 915          */
 916         if (drop) {
 917                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 918                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 919                         IWL_ERR(priv, "flush request fail\n");
 920                         goto done;
 921                 }
 922         }
 923         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 924         iwl_trans_wait_tx_queue_empty(trans(priv));
 925 done:
 926         mutex_unlock(&priv->shrd->mutex);
 927         IWL_DEBUG_MAC80211(priv, "leave\n");
 928 }
 929
 930 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 931                                      struct ieee80211_channel *channel,
 932                                      enum nl80211_channel_type channel_type,
 933                                      int duration)
 934 {
 935         struct iwl_priv *priv = hw->priv;
 936         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 937         int err = 0;
 938
 939         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 940                 return -EOPNOTSUPP;
 941
 942         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 943                 return -EOPNOTSUPP;
 944
 945         IWL_DEBUG_MAC80211(priv, "enter\n");
 946         mutex_lock(&priv->shrd->mutex);
 947
 948         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 949                 err = -EBUSY;
 950                 goto out;
 951         }
 952
 953         priv->hw_roc_channel = channel;
 954         priv->hw_roc_chantype = channel_type;
 955         /* convert from ms to TU */
 956         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 957         priv->hw_roc_start_notified = false;
 958         cancel_delayed_work(&priv->hw_roc_disable_work);
 959
 960         if (!ctx->is_active) {
 961                 static const struct iwl_qos_info default_qos_data = {
 962                         .def_qos_parm = {
 963                                 .ac[0] = {
 964                                         .cw_min = cpu_to_le16(3),
 965                                         .cw_max = cpu_to_le16(7),
 966                                         .aifsn = 2,
 967                                         .edca_txop = cpu_to_le16(1504),
 968                                 },
 969                                 .ac[1] = {
 970                                         .cw_min = cpu_to_le16(7),
 971                                         .cw_max = cpu_to_le16(15),
 972                                         .aifsn = 2,
 973                                         .edca_txop = cpu_to_le16(3008),
 974                                 },
 975                                 .ac[2] = {
 976                                         .cw_min = cpu_to_le16(15),
 977                                         .cw_max = cpu_to_le16(1023),
 978                                         .aifsn = 3,
 979                                 },
 980                                 .ac[3] = {
 981                                         .cw_min = cpu_to_le16(15),
 982                                         .cw_max = cpu_to_le16(1023),
 983                                         .aifsn = 7,
 984                                 },
 985                         },
 986                 };
 987
 988                 ctx->is_active = true;
 989                 ctx->qos_data = default_qos_data;
 990                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 991                 memcpy(ctx->staging.node_addr,
 992                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 993                        ETH_ALEN);
 994                 memcpy(ctx->staging.bssid_addr,
 995                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 996                        ETH_ALEN);
 997                 err = iwlagn_commit_rxon(priv, ctx);
 998                 if (err)
 999                         goto out;
1000                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1001                                              RXON_FILTER_PROMISC_MSK |
1002                                              RXON_FILTER_CTL2HOST_MSK;
1003
1004                 err = iwlagn_commit_rxon(priv, ctx);
1005                 if (err) {
1006                         iwlagn_disable_roc(priv);
1007                         goto out;
1008                 }
1009                 priv->hw_roc_setup = true;
1010         }
1011
1012         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1013         if (err)
1014                 iwlagn_disable_roc(priv);
1015
1016  out:
1017         mutex_unlock(&priv->shrd->mutex);
1018         IWL_DEBUG_MAC80211(priv, "leave\n");
1019
1020         return err;
1021 }
1022
1023 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1024 {
1025         struct iwl_priv *priv = hw->priv;
1026
1027         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1028                 return -EOPNOTSUPP;
1029
1030         IWL_DEBUG_MAC80211(priv, "enter\n");
1031         mutex_lock(&priv->shrd->mutex);
1032         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1033         iwlagn_disable_roc(priv);
1034         mutex_unlock(&priv->shrd->mutex);
1035         IWL_DEBUG_MAC80211(priv, "leave\n");
1036
1037         return 0;
1038 }
1039
1040 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1041                               struct ieee80211_vif *vif,
1042                               const u8 *bssid,
1043                               enum ieee80211_tx_sync_type type)
1044 {
1045         struct iwl_priv *priv = hw->priv;
1046         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1047         struct iwl_rxon_context *ctx = vif_priv->ctx;
1048         int ret;
1049         u8 sta_id;
1050
1051         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1052                 return 0;
1053
1054         IWL_DEBUG_MAC80211(priv, "enter\n");
1055         mutex_lock(&priv->shrd->mutex);
1056
1057         if (iwl_is_associated_ctx(ctx)) {
1058                 ret = 0;
1059                 goto out;
1060         }
1061
1062         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1063             &priv->shrd->status)) {
1064                 ret = -EBUSY;
1065                 goto out;
1066         }
1067
1068         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1069         if (ret)
1070                 goto out;
1071
1072         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1073                 ret = -EIO;
1074                 goto out_remove_sta;
1075         }
1076
1077         memcpy(ctx->bssid, bssid, ETH_ALEN);
1078         ctx->preauth_bssid = true;
1079
1080         ret = iwlagn_commit_rxon(priv, ctx);
1081
1082         if (ret == 0)
1083                 goto out;
1084
1085  out_remove_sta:
1086         iwl_remove_station(priv, sta_id, bssid);
1087  out:
1088         mutex_unlock(&priv->shrd->mutex);
1089         IWL_DEBUG_MAC80211(priv, "leave\n");
1090
1091         return ret;
1092 }
1093
1094 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1095                                    struct ieee80211_vif *vif,
1096                                    const u8 *bssid,
1097                                    enum ieee80211_tx_sync_type type)
1098 {
1099         struct iwl_priv *priv = hw->priv;
1100         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1101         struct iwl_rxon_context *ctx = vif_priv->ctx;
1102
1103         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1104                 return;
1105
1106         IWL_DEBUG_MAC80211(priv, "enter\n");
1107         mutex_lock(&priv->shrd->mutex);
1108
1109         if (iwl_is_associated_ctx(ctx))
1110                 goto out;
1111
1112         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1113         ctx->preauth_bssid = false;
1114         /* no need to commit */
1115  out:
1116         mutex_unlock(&priv->shrd->mutex);
1117         IWL_DEBUG_MAC80211(priv, "leave\n");
1118 }
1119
1120 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1121                            enum ieee80211_rssi_event rssi_event)
1122 {
1123         struct iwl_priv *priv = hw->priv;
1124
1125         IWL_DEBUG_MAC80211(priv, "enter\n");
1126         mutex_lock(&priv->shrd->mutex);
1127
1128         if (priv->cfg->bt_params &&
1129                         priv->cfg->bt_params->advanced_bt_coexist) {
1130                 if (rssi_event == RSSI_EVENT_LOW)
1131                         priv->bt_enable_pspoll = true;
1132                 else if (rssi_event == RSSI_EVENT_HIGH)
1133                         priv->bt_enable_pspoll = false;
1134
1135                 iwlagn_send_advance_bt_config(priv);
1136         } else {
1137                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1138                                 "ignoring RSSI callback\n");
1139         }
1140
1141         mutex_unlock(&priv->shrd->mutex);
1142         IWL_DEBUG_MAC80211(priv, "leave\n");
1143 }
1144
1145 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1146                            struct ieee80211_sta *sta, bool set)
1147 {
1148         struct iwl_priv *priv = hw->priv;
1149
1150         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1151
1152         return 0;
1153 }
1154
1155 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1156                     struct ieee80211_vif *vif, u16 queue,
1157                     const struct ieee80211_tx_queue_params *params)
1158 {
1159         struct iwl_priv *priv = hw->priv;
1160         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1161         struct iwl_rxon_context *ctx = vif_priv->ctx;
1162         unsigned long flags;
1163         int q;
1164
1165         if (WARN_ON(!ctx))
1166                 return -EINVAL;
1167
1168         IWL_DEBUG_MAC80211(priv, "enter\n");
1169
1170         if (!iwl_is_ready_rf(priv->shrd)) {
1171                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1172                 return -EIO;
1173         }
1174
1175         if (queue >= AC_NUM) {
1176                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1177                 return 0;
1178         }
1179
1180         q = AC_NUM - 1 - queue;
1181
1182         spin_lock_irqsave(&priv->shrd->lock, flags);
1183
1184         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1185                 cpu_to_le16(params->cw_min);
1186         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1187                 cpu_to_le16(params->cw_max);
1188         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1189         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1190                         cpu_to_le16((params->txop * 32));
1191
1192         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1193
1194         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1195
1196         IWL_DEBUG_MAC80211(priv, "leave\n");
1197         return 0;
1198 }
1199
1200 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1201 {
1202         struct iwl_priv *priv = hw->priv;
1203
1204         return priv->ibss_manager == IWL_IBSS_MANAGER;
1205 }
1206
1207 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1208 {
1209         iwl_connection_init_rx_config(priv, ctx);
1210
1211         iwlagn_set_rxon_chain(priv, ctx);
1212
1213         return iwlagn_commit_rxon(priv, ctx);
1214 }
1215
1216 static int iwl_setup_interface(struct iwl_priv *priv,
1217                                struct iwl_rxon_context *ctx)
1218 {
1219         struct ieee80211_vif *vif = ctx->vif;
1220         int err;
1221
1222         lockdep_assert_held(&priv->shrd->mutex);
1223
1224         /*
1225          * This variable will be correct only when there's just
1226          * a single context, but all code using it is for hardware
1227          * that supports only one context.
1228          */
1229         priv->iw_mode = vif->type;
1230
1231         ctx->is_active = true;
1232
1233         err = iwl_set_mode(priv, ctx);
1234         if (err) {
1235                 if (!ctx->always_active)
1236                         ctx->is_active = false;
1237                 return err;
1238         }
1239
1240         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1241             vif->type == NL80211_IFTYPE_ADHOC) {
1242                 /*
1243                  * pretend to have high BT traffic as long as we
1244                  * are operating in IBSS mode, as this will cause
1245                  * the rate scaling etc. to behave as intended.
1246                  */
1247                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1248         }
1249
1250         return 0;
1251 }
1252
1253 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1254                              struct ieee80211_vif *vif)
1255 {
1256         struct iwl_priv *priv = hw->priv;
1257         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1258         struct iwl_rxon_context *tmp, *ctx = NULL;
1259         int err;
1260         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1261
1262         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1263                            viftype, vif->addr);
1264
1265         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1266
1267         mutex_lock(&priv->shrd->mutex);
1268
1269         iwlagn_disable_roc(priv);
1270
1271         if (!iwl_is_ready_rf(priv->shrd)) {
1272                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1273                 err = -EINVAL;
1274                 goto out;
1275         }
1276
1277         for_each_context(priv, tmp) {
1278                 u32 possible_modes =
1279                         tmp->interface_modes | tmp->exclusive_interface_modes;
1280
1281                 if (tmp->vif) {
1282                         /* check if this busy context is exclusive */
1283                         if (tmp->exclusive_interface_modes &
1284                                                 BIT(tmp->vif->type)) {
1285                                 err = -EINVAL;
1286                                 goto out;
1287                         }
1288                         continue;
1289                 }
1290
1291                 if (!(possible_modes & BIT(viftype)))
1292                         continue;
1293
1294                 /* have maybe usable context w/o interface */
1295                 ctx = tmp;
1296                 break;
1297         }
1298
1299         if (!ctx) {
1300                 err = -EOPNOTSUPP;
1301                 goto out;
1302         }
1303
1304         vif_priv->ctx = ctx;
1305         ctx->vif = vif;
1306
1307         err = iwl_setup_interface(priv, ctx);
1308         if (!err)
1309                 goto out;
1310
1311         ctx->vif = NULL;
1312         priv->iw_mode = NL80211_IFTYPE_STATION;
1313  out:
1314         mutex_unlock(&priv->shrd->mutex);
1315
1316         IWL_DEBUG_MAC80211(priv, "leave\n");
1317         return err;
1318 }
1319
1320 static void iwl_teardown_interface(struct iwl_priv *priv,
1321                                    struct ieee80211_vif *vif,
1322                                    bool mode_change)
1323 {
1324         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1325
1326         lockdep_assert_held(&priv->shrd->mutex);
1327
1328         if (priv->scan_vif == vif) {
1329                 iwl_scan_cancel_timeout(priv, 200);
1330                 iwl_force_scan_end(priv);
1331         }
1332
1333         if (!mode_change) {
1334                 iwl_set_mode(priv, ctx);
1335                 if (!ctx->always_active)
1336                         ctx->is_active = false;
1337         }
1338
1339         /*
1340          * When removing the IBSS interface, overwrite the
1341          * BT traffic load with the stored one from the last
1342          * notification, if any. If this is a device that
1343          * doesn't implement this, this has no effect since
1344          * both values are the same and zero.
1345          */
1346         if (vif->type == NL80211_IFTYPE_ADHOC)
1347                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1348 }
1349
1350 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1351                               struct ieee80211_vif *vif)
1352 {
1353         struct iwl_priv *priv = hw->priv;
1354         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1355
1356         IWL_DEBUG_MAC80211(priv, "enter\n");
1357
1358         mutex_lock(&priv->shrd->mutex);
1359
1360         if (WARN_ON(ctx->vif != vif)) {
1361                 struct iwl_rxon_context *tmp;
1362                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1363                 for_each_context(priv, tmp)
1364                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1365                                 tmp->ctxid, tmp, tmp->vif);
1366         }
1367         ctx->vif = NULL;
1368
1369         iwl_teardown_interface(priv, vif, false);
1370
1371         mutex_unlock(&priv->shrd->mutex);
1372
1373         IWL_DEBUG_MAC80211(priv, "leave\n");
1374
1375 }
1376
1377 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1378                                 struct ieee80211_vif *vif,
1379                                 enum nl80211_iftype newtype, bool newp2p)
1380 {
1381         struct iwl_priv *priv = hw->priv;
1382         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1383         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1384         struct iwl_rxon_context *tmp;
1385         enum nl80211_iftype newviftype = newtype;
1386         u32 interface_modes;
1387         int err;
1388
1389         IWL_DEBUG_MAC80211(priv, "enter\n");
1390
1391         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1392
1393         mutex_lock(&priv->shrd->mutex);
1394
1395         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1396                 /*
1397                  * Huh? But wait ... this can maybe happen when
1398                  * we're in the middle of a firmware restart!
1399                  */
1400                 err = -EBUSY;
1401                 goto out;
1402         }
1403
1404         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1405
1406         if (!(interface_modes & BIT(newtype))) {
1407                 err = -EBUSY;
1408                 goto out;
1409         }
1410
1411         /*
1412          * Refuse a change that should be done by moving from the PAN
1413          * context to the BSS context instead, if the BSS context is
1414          * available and can support the new interface type.
1415          */
1416         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1417             (bss_ctx->interface_modes & BIT(newtype) ||
1418              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1419                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1420                 err = -EBUSY;
1421                 goto out;
1422         }
1423
1424         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1425                 for_each_context(priv, tmp) {
1426                         if (ctx == tmp)
1427                                 continue;
1428
1429                         if (!tmp->vif)
1430                                 continue;
1431
1432                         /*
1433                          * The current mode switch would be exclusive, but
1434                          * another context is active ... refuse the switch.
1435                          */
1436                         err = -EBUSY;
1437                         goto out;
1438                 }
1439         }
1440
1441         /* success */
1442         iwl_teardown_interface(priv, vif, true);
1443         vif->type = newviftype;
1444         vif->p2p = newp2p;
1445         err = iwl_setup_interface(priv, ctx);
1446         WARN_ON(err);
1447         /*
1448          * We've switched internally, but submitting to the
1449          * device may have failed for some reason. Mask this
1450          * error, because otherwise mac80211 will not switch
1451          * (and set the interface type back) and we'll be
1452          * out of sync with it.
1453          */
1454         err = 0;
1455
1456  out:
1457         mutex_unlock(&priv->shrd->mutex);
1458         IWL_DEBUG_MAC80211(priv, "leave\n");
1459
1460         return err;
1461 }
1462
1463 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1464                     struct ieee80211_vif *vif,
1465                     struct cfg80211_scan_request *req)
1466 {
1467         struct iwl_priv *priv = hw->priv;
1468         int ret;
1469
1470         IWL_DEBUG_MAC80211(priv, "enter\n");
1471
1472         if (req->n_channels == 0)
1473                 return -EINVAL;
1474
1475         mutex_lock(&priv->shrd->mutex);
1476
1477         /*
1478          * If an internal scan is in progress, just set
1479          * up the scan_request as per above.
1480          */
1481         if (priv->scan_type != IWL_SCAN_NORMAL) {
1482                 IWL_DEBUG_SCAN(priv,
1483                                "SCAN request during internal scan - defer\n");
1484                 priv->scan_request = req;
1485                 priv->scan_vif = vif;
1486                 ret = 0;
1487         } else {
1488                 priv->scan_request = req;
1489                 priv->scan_vif = vif;
1490                 /*
1491                  * mac80211 will only ask for one band at a time
1492                  * so using channels[0] here is ok
1493                  */
1494                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1495                                         req->channels[0]->band);
1496                 if (ret) {
1497                         priv->scan_request = NULL;
1498                         priv->scan_vif = NULL;
1499                 }
1500         }
1501
1502         IWL_DEBUG_MAC80211(priv, "leave\n");
1503
1504         mutex_unlock(&priv->shrd->mutex);
1505
1506         return ret;
1507 }
1508
1509 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1510                        struct ieee80211_vif *vif,
1511                        struct ieee80211_sta *sta)
1512 {
1513         struct iwl_priv *priv = hw->priv;
1514         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1515         int ret;
1516
1517         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1518                            "station %pM\n", sta->addr);
1519         mutex_lock(&priv->shrd->mutex);
1520         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1521                         sta->addr);
1522         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1523         if (ret)
1524                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1525                         sta->addr);
1526         mutex_unlock(&priv->shrd->mutex);
1527         IWL_DEBUG_MAC80211(priv, "leave\n");
1528
1529         return ret;
1530 }
1531
1532 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1533 {
1534         unsigned long flags;
1535
1536         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1537         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1538         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1539         priv->stations[sta_id].sta.sta.modify_mask = 0;
1540         priv->stations[sta_id].sta.sleep_tx_count = 0;
1541         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1542         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1543         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1544
1545 }
1546
1547 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1548                            struct ieee80211_vif *vif,
1549                            enum sta_notify_cmd cmd,
1550                            struct ieee80211_sta *sta)
1551 {
1552         struct iwl_priv *priv = hw->priv;
1553         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1554         int sta_id;
1555
1556         IWL_DEBUG_MAC80211(priv, "enter\n");
1557
1558         switch (cmd) {
1559         case STA_NOTIFY_SLEEP:
1560                 WARN_ON(!sta_priv->client);
1561                 sta_priv->asleep = true;
1562                 if (atomic_read(&sta_priv->pending_frames) > 0)
1563                         ieee80211_sta_block_awake(hw, sta, true);
1564                 break;
1565         case STA_NOTIFY_AWAKE:
1566                 WARN_ON(!sta_priv->client);
1567                 if (!sta_priv->asleep)
1568                         break;
1569                 sta_priv->asleep = false;
1570                 sta_id = iwl_sta_id(sta);
1571                 if (sta_id != IWL_INVALID_STATION)
1572                         iwl_sta_modify_ps_wake(priv, sta_id);
1573                 break;
1574         default:
1575                 break;
1576         }
1577         IWL_DEBUG_MAC80211(priv, "leave\n");
1578 }
1579
1580 struct ieee80211_ops iwlagn_hw_ops = {
1581         .tx = iwlagn_mac_tx,
1582         .start = iwlagn_mac_start,
1583         .stop = iwlagn_mac_stop,
1584 #ifdef CONFIG_PM_SLEEP
1585         .suspend = iwlagn_mac_suspend,
1586         .resume = iwlagn_mac_resume,
1587 #endif
1588         .add_interface = iwlagn_mac_add_interface,
1589         .remove_interface = iwlagn_mac_remove_interface,
1590         .change_interface = iwlagn_mac_change_interface,
1591         .config = iwlagn_mac_config,
1592         .configure_filter = iwlagn_configure_filter,
1593         .set_key = iwlagn_mac_set_key,
1594         .update_tkip_key = iwlagn_mac_update_tkip_key,
1595         .set_rekey_data = iwlagn_mac_set_rekey_data,
1596         .conf_tx = iwlagn_mac_conf_tx,
1597         .bss_info_changed = iwlagn_bss_info_changed,
1598         .ampdu_action = iwlagn_mac_ampdu_action,
1599         .hw_scan = iwlagn_mac_hw_scan,
1600         .sta_notify = iwlagn_mac_sta_notify,
1601         .sta_add = iwlagn_mac_sta_add,
1602         .sta_remove = iwlagn_mac_sta_remove,
1603         .channel_switch = iwlagn_mac_channel_switch,
1604         .flush = iwlagn_mac_flush,
1605         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1606         .remain_on_channel = iwlagn_mac_remain_on_channel,
1607         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1608         .rssi_callback = iwlagn_mac_rssi_callback,
1609         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1610         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1611         .tx_sync = iwlagn_mac_tx_sync,
1612         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1613         .set_tim = iwlagn_mac_set_tim,
1614 };
1615
1616 /* This function both allocates and initializes hw and priv. */
1617 struct ieee80211_hw *iwl_alloc_all(void)
1618 {
1619         struct iwl_priv *priv;
1620         /* mac80211 allocates memory for this device instance, including
1621          *   space for this driver's private structure */
1622         struct ieee80211_hw *hw;
1623
1624         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1625         if (!hw)
1626                 goto out;
1627
1628         priv = hw->priv;
1629         priv->hw = hw;
1630
1631 out:
1632         return hw;
1633 }