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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/firmware.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/if_arp.h>
  41
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-eeprom.h"
  47 #include "iwl-wifi.h"
  48 #include "iwl-dev.h"
  49 #include "iwl-core.h"
  50 #include "iwl-io.h"
  51 #include "iwl-agn-calib.h"
  52 #include "iwl-agn.h"
  53 #include "iwl-shared.h"
  54 #include "iwl-bus.h"
  55 #include "iwl-trans.h"
  56
  57 /*****************************************************************************
  58  *
  59  * mac80211 entry point functions
  60  *
  61  *****************************************************************************/
  62
  63 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  64         {
  65                 .max = 1,
  66                 .types = BIT(NL80211_IFTYPE_STATION),
  67         },
  68         {
  69                 .max = 1,
  70                 .types = BIT(NL80211_IFTYPE_AP),
  71         },
  72 };
  73
  74 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  75         {
  76                 .max = 2,
  77                 .types = BIT(NL80211_IFTYPE_STATION),
  78         },
  79 };
  80
  81 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  82         {
  83                 .max = 1,
  84                 .types = BIT(NL80211_IFTYPE_STATION),
  85         },
  86         {
  87                 .max = 1,
  88                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  89                          BIT(NL80211_IFTYPE_AP),
  90         },
  91 };
  92
  93 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  94         {
  95                 .max = 2,
  96                 .types = BIT(NL80211_IFTYPE_STATION),
  97         },
  98         {
  99                 .max = 1,
 100                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
 101         },
 102 };
 103
 104 static const struct ieee80211_iface_combination
 105 iwlagn_iface_combinations_dualmode[] = {
 106         { .num_different_channels = 1,
 107           .max_interfaces = 2,
 108           .beacon_int_infra_match = true,
 109           .limits = iwlagn_sta_ap_limits,
 110           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 111         },
 112         { .num_different_channels = 1,
 113           .max_interfaces = 2,
 114           .limits = iwlagn_2sta_limits,
 115           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 116         },
 117 };
 118
 119 static const struct ieee80211_iface_combination
 120 iwlagn_iface_combinations_p2p[] = {
 121         { .num_different_channels = 1,
 122           .max_interfaces = 2,
 123           .beacon_int_infra_match = true,
 124           .limits = iwlagn_p2p_sta_go_limits,
 125           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 126         },
 127         { .num_different_channels = 1,
 128           .max_interfaces = 2,
 129           .limits = iwlagn_p2p_2sta_limits,
 130           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 131         },
 132 };
 133
 134 /*
 135  * Not a mac80211 entry point function, but it fits in with all the
 136  * other mac80211 functions grouped here.
 137  */
 138 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 139                                   struct iwlagn_ucode_capabilities *capa)
 140 {
 141         int ret;
 142         struct ieee80211_hw *hw = priv->hw;
 143         struct iwl_rxon_context *ctx;
 144
 145         hw->rate_control_algorithm = "iwl-agn-rs";
 146
 147         /* Tell mac80211 our characteristics */
 148         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 149                     IEEE80211_HW_AMPDU_AGGREGATION |
 150                     IEEE80211_HW_NEED_DTIM_PERIOD |
 151                     IEEE80211_HW_SPECTRUM_MGMT |
 152                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 153
 154         /*
 155          * Including the following line will crash some AP's.  This
 156          * workaround removes the stimulus which causes the crash until
 157          * the AP software can be fixed.
 158         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 159          */
 160
 161         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 162                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 163
 164         if (cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE)
 165                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 166                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 167
 168         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 169                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 170
 171         hw->sta_data_size = sizeof(struct iwl_station_priv);
 172         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 173
 174         for_each_context(priv, ctx) {
 175                 hw->wiphy->interface_modes |= ctx->interface_modes;
 176                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 177         }
 178
 179         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 180
 181         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 182                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 183                 hw->wiphy->n_iface_combinations =
 184                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 185         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 186                 hw->wiphy->iface_combinations =
 187                         iwlagn_iface_combinations_dualmode;
 188                 hw->wiphy->n_iface_combinations =
 189                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 190         }
 191
 192         hw->wiphy->max_remain_on_channel_duration = 1000;
 193
 194         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 195                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 196                             WIPHY_FLAG_IBSS_RSN;
 197
 198         if (trans(priv)->ucode_wowlan.code.len &&
 199             device_can_wakeup(bus(priv)->dev)) {
 200                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 201                                           WIPHY_WOWLAN_DISCONNECT |
 202                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 203                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 204                 if (!iwlagn_mod_params.sw_crypto)
 205                         hw->wiphy->wowlan.flags |=
 206                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 207                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 208
 209                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 210                 hw->wiphy->wowlan.pattern_min_len =
 211                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 212                 hw->wiphy->wowlan.pattern_max_len =
 213                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 214         }
 215
 216         if (iwlagn_mod_params.power_save)
 217                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 218         else
 219                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 220
 221         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 222         /* we create the 802.11 header and a zero-length SSID element */
 223         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 224
 225         /* Default value; 4 EDCA QOS priorities */
 226         hw->queues = 4;
 227
 228         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 229
 230         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 231                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 232                         &priv->bands[IEEE80211_BAND_2GHZ];
 233         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 234                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 235                         &priv->bands[IEEE80211_BAND_5GHZ];
 236
 237         hw->wiphy->hw_version = bus_get_hw_id(bus(priv));
 238
 239         iwl_leds_init(priv);
 240
 241         ret = ieee80211_register_hw(priv->hw);
 242         if (ret) {
 243                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 244                 return ret;
 245         }
 246         priv->mac80211_registered = 1;
 247
 248         return 0;
 249 }
 250
 251 void iwlagn_mac_unregister(struct iwl_priv *priv)
 252 {
 253         if (!priv->mac80211_registered)
 254                 return;
 255         iwl_leds_exit(priv);
 256         ieee80211_unregister_hw(priv->hw);
 257         priv->mac80211_registered = 0;
 258 }
 259
 260 static int __iwl_up(struct iwl_priv *priv)
 261 {
 262         struct iwl_rxon_context *ctx;
 263         int ret;
 264
 265         lockdep_assert_held(&priv->shrd->mutex);
 266
 267         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 268                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 269                 return -EIO;
 270         }
 271
 272         for_each_context(priv, ctx) {
 273                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 274                 if (ret) {
 275                         iwl_dealloc_bcast_stations(priv);
 276                         return ret;
 277                 }
 278         }
 279
 280         ret = iwl_run_init_ucode(trans(priv));
 281         if (ret) {
 282                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 283                 goto error;
 284         }
 285
 286         ret = iwl_load_ucode_wait_alive(trans(priv), IWL_UCODE_REGULAR);
 287         if (ret) {
 288                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 289                 goto error;
 290         }
 291
 292         ret = iwl_alive_start(priv);
 293         if (ret)
 294                 goto error;
 295         return 0;
 296
 297  error:
 298         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 299         __iwl_down(priv);
 300         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 301
 302         IWL_ERR(priv, "Unable to initialize device.\n");
 303         return ret;
 304 }
 305
 306 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 307 {
 308         struct iwl_priv *priv = hw->priv;
 309         int ret;
 310
 311         IWL_DEBUG_MAC80211(priv, "enter\n");
 312
 313         /* we should be verifying the device is ready to be opened */
 314         mutex_lock(&priv->shrd->mutex);
 315         ret = __iwl_up(priv);
 316         mutex_unlock(&priv->shrd->mutex);
 317         if (ret)
 318                 return ret;
 319
 320         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 321
 322         /* Now we should be done, and the READY bit should be set. */
 323         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 324                 ret = -EIO;
 325
 326         iwlagn_led_enable(priv);
 327
 328         priv->is_open = 1;
 329         IWL_DEBUG_MAC80211(priv, "leave\n");
 330         return 0;
 331 }
 332
 333 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 334 {
 335         struct iwl_priv *priv = hw->priv;
 336
 337         IWL_DEBUG_MAC80211(priv, "enter\n");
 338
 339         if (!priv->is_open)
 340                 return;
 341
 342         priv->is_open = 0;
 343
 344         iwl_down(priv);
 345
 346         flush_workqueue(priv->shrd->workqueue);
 347
 348         /* User space software may expect getting rfkill changes
 349          * even if interface is down */
 350         iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
 351         iwl_enable_rfkill_int(priv);
 352
 353         IWL_DEBUG_MAC80211(priv, "leave\n");
 354 }
 355
 356 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 357                                       struct ieee80211_vif *vif,
 358                                       struct cfg80211_gtk_rekey_data *data)
 359 {
 360         struct iwl_priv *priv = hw->priv;
 361
 362         if (iwlagn_mod_params.sw_crypto)
 363                 return;
 364
 365         IWL_DEBUG_MAC80211(priv, "enter\n");
 366         mutex_lock(&priv->shrd->mutex);
 367
 368         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 369                 goto out;
 370
 371         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 372         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 373         priv->replay_ctr =
 374                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 375         priv->have_rekey_data = true;
 376
 377  out:
 378         mutex_unlock(&priv->shrd->mutex);
 379         IWL_DEBUG_MAC80211(priv, "leave\n");
 380 }
 381
 382 #ifdef CONFIG_PM_SLEEP
 383
 384 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 385                               struct cfg80211_wowlan *wowlan)
 386 {
 387         struct iwl_priv *priv = hw->priv;
 388         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 389         int ret;
 390
 391         if (WARN_ON(!wowlan))
 392                 return -EINVAL;
 393
 394         IWL_DEBUG_MAC80211(priv, "enter\n");
 395         mutex_lock(&priv->shrd->mutex);
 396
 397         /* Don't attempt WoWLAN when not associated, tear down instead. */
 398         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 399             !iwl_is_associated_ctx(ctx)) {
 400                 ret = 1;
 401                 goto out;
 402         }
 403
 404         ret = iwlagn_suspend(priv, hw, wowlan);
 405         if (ret)
 406                 goto error;
 407
 408         device_set_wakeup_enable(bus(priv)->dev, true);
 409
 410         /* Now let the ucode operate on its own */
 411         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 412                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 413
 414         goto out;
 415
 416  error:
 417         priv->shrd->wowlan = false;
 418         iwlagn_prepare_restart(priv);
 419         ieee80211_restart_hw(priv->hw);
 420  out:
 421         mutex_unlock(&priv->shrd->mutex);
 422         IWL_DEBUG_MAC80211(priv, "leave\n");
 423
 424         return ret;
 425 }
 426
 427 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 428 {
 429         struct iwl_priv *priv = hw->priv;
 430         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 431         struct ieee80211_vif *vif;
 432         unsigned long flags;
 433         u32 base, status = 0xffffffff;
 434         int ret = -EIO;
 435
 436         IWL_DEBUG_MAC80211(priv, "enter\n");
 437         mutex_lock(&priv->shrd->mutex);
 438
 439         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 440                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 441
 442         base = priv->shrd->device_pointers.error_event_table;
 443         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 444                 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
 445                 ret = iwl_grab_nic_access_silent(bus(priv));
 446                 if (ret == 0) {
 447                         iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
 448                         status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
 449                         iwl_release_nic_access(bus(priv));
 450                 }
 451                 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
 452
 453 #ifdef CONFIG_IWLWIFI_DEBUGFS
 454                 if (ret == 0) {
 455                         struct iwl_trans *trans = trans(priv);
 456                         if (!priv->wowlan_sram)
 457                                 priv->wowlan_sram =
 458                                         kzalloc(trans->ucode_wowlan.data.len,
 459                                                 GFP_KERNEL);
 460
 461                         if (priv->wowlan_sram)
 462                                 _iwl_read_targ_mem_words(
 463                                         bus(priv), 0x800000, priv->wowlan_sram,
 464                                         trans->ucode_wowlan.data.len / 4);
 465                 }
 466 #endif
 467         }
 468
 469         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 470         vif = ctx->vif;
 471
 472         priv->shrd->wowlan = false;
 473
 474         device_set_wakeup_enable(bus(priv)->dev, false);
 475
 476         iwlagn_prepare_restart(priv);
 477
 478         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 479         iwl_connection_init_rx_config(priv, ctx);
 480         iwlagn_set_rxon_chain(priv, ctx);
 481
 482         mutex_unlock(&priv->shrd->mutex);
 483         IWL_DEBUG_MAC80211(priv, "leave\n");
 484
 485         ieee80211_resume_disconnect(vif);
 486
 487         return 1;
 488 }
 489
 490 #endif
 491
 492 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 493 {
 494         struct iwl_priv *priv = hw->priv;
 495
 496         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 497                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 498
 499         if (iwlagn_tx_skb(priv, skb))
 500                 dev_kfree_skb_any(skb);
 501 }
 502
 503 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 504                                        struct ieee80211_vif *vif,
 505                                        struct ieee80211_key_conf *keyconf,
 506                                        struct ieee80211_sta *sta,
 507                                        u32 iv32, u16 *phase1key)
 508 {
 509         struct iwl_priv *priv = hw->priv;
 510
 511         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 512 }
 513
 514 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 515                               struct ieee80211_vif *vif,
 516                               struct ieee80211_sta *sta,
 517                               struct ieee80211_key_conf *key)
 518 {
 519         struct iwl_priv *priv = hw->priv;
 520         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 521         struct iwl_rxon_context *ctx = vif_priv->ctx;
 522         int ret;
 523         bool is_default_wep_key = false;
 524
 525         IWL_DEBUG_MAC80211(priv, "enter\n");
 526
 527         if (iwlagn_mod_params.sw_crypto) {
 528                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 529                 return -EOPNOTSUPP;
 530         }
 531
 532         switch (key->cipher) {
 533         case WLAN_CIPHER_SUITE_TKIP:
 534                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 535                 /* fall through */
 536         case WLAN_CIPHER_SUITE_CCMP:
 537                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 538                 break;
 539         default:
 540                 break;
 541         }
 542
 543         /*
 544          * We could program these keys into the hardware as well, but we
 545          * don't expect much multicast traffic in IBSS and having keys
 546          * for more stations is probably more useful.
 547          *
 548          * Mark key TX-only and return 0.
 549          */
 550         if (vif->type == NL80211_IFTYPE_ADHOC &&
 551             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 552                 key->hw_key_idx = WEP_INVALID_OFFSET;
 553                 return 0;
 554         }
 555
 556         /* If they key was TX-only, accept deletion */
 557         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 558                 return 0;
 559
 560         mutex_lock(&priv->shrd->mutex);
 561         iwl_scan_cancel_timeout(priv, 100);
 562
 563         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 564
 565         /*
 566          * If we are getting WEP group key and we didn't receive any key mapping
 567          * so far, we are in legacy wep mode (group key only), otherwise we are
 568          * in 1X mode.
 569          * In legacy wep mode, we use another host command to the uCode.
 570          */
 571         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 572              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 573                 if (cmd == SET_KEY)
 574                         is_default_wep_key = !ctx->key_mapping_keys;
 575                 else
 576                         is_default_wep_key =
 577                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 578         }
 579
 580
 581         switch (cmd) {
 582         case SET_KEY:
 583                 if (is_default_wep_key) {
 584                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 585                         break;
 586                 }
 587                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 588                 if (ret) {
 589                         /*
 590                          * can't add key for RX, but we don't need it
 591                          * in the device for TX so still return 0
 592                          */
 593                         ret = 0;
 594                         key->hw_key_idx = WEP_INVALID_OFFSET;
 595                 }
 596
 597                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 598                 break;
 599         case DISABLE_KEY:
 600                 if (is_default_wep_key)
 601                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 602                 else
 603                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 604
 605                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 606                 break;
 607         default:
 608                 ret = -EINVAL;
 609         }
 610
 611         mutex_unlock(&priv->shrd->mutex);
 612         IWL_DEBUG_MAC80211(priv, "leave\n");
 613
 614         return ret;
 615 }
 616
 617 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 618                                    struct ieee80211_vif *vif,
 619                                    enum ieee80211_ampdu_mlme_action action,
 620                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 621                                    u8 buf_size)
 622 {
 623         struct iwl_priv *priv = hw->priv;
 624         int ret = -EINVAL;
 625         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 626
 627         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 628                      sta->addr, tid);
 629
 630         if (!(cfg(priv)->sku & EEPROM_SKU_CAP_11N_ENABLE))
 631                 return -EACCES;
 632
 633         IWL_DEBUG_MAC80211(priv, "enter\n");
 634         mutex_lock(&priv->shrd->mutex);
 635
 636         switch (action) {
 637         case IEEE80211_AMPDU_RX_START:
 638                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 639                         break;
 640                 IWL_DEBUG_HT(priv, "start Rx\n");
 641                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 642                 break;
 643         case IEEE80211_AMPDU_RX_STOP:
 644                 IWL_DEBUG_HT(priv, "stop Rx\n");
 645                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 646                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 647                         ret = 0;
 648                 break;
 649         case IEEE80211_AMPDU_TX_START:
 650                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 651                         break;
 652                 IWL_DEBUG_HT(priv, "start Tx\n");
 653                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 654                 break;
 655         case IEEE80211_AMPDU_TX_STOP:
 656                 IWL_DEBUG_HT(priv, "stop Tx\n");
 657                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 658                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 659                         priv->agg_tids_count--;
 660                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 661                                      priv->agg_tids_count);
 662                 }
 663                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 664                         ret = 0;
 665                 if (!priv->agg_tids_count && cfg(priv)->ht_params &&
 666                     cfg(priv)->ht_params->use_rts_for_aggregation) {
 667                         /*
 668                          * switch off RTS/CTS if it was previously enabled
 669                          */
 670                         sta_priv->lq_sta.lq.general_params.flags &=
 671                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 672                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 673                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 674                 }
 675                 break;
 676         case IEEE80211_AMPDU_TX_OPERATIONAL:
 677                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 678                 break;
 679         }
 680         mutex_unlock(&priv->shrd->mutex);
 681         IWL_DEBUG_MAC80211(priv, "leave\n");
 682         return ret;
 683 }
 684
 685 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 686                               struct ieee80211_vif *vif,
 687                               struct ieee80211_sta *sta)
 688 {
 689         struct iwl_priv *priv = hw->priv;
 690         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 691         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 692         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 693         int ret = 0;
 694         u8 sta_id;
 695
 696         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
 697                         sta->addr);
 698         mutex_lock(&priv->shrd->mutex);
 699         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 700                         sta->addr);
 701         sta_priv->sta_id = IWL_INVALID_STATION;
 702
 703         atomic_set(&sta_priv->pending_frames, 0);
 704         if (vif->type == NL80211_IFTYPE_AP)
 705                 sta_priv->client = true;
 706
 707         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 708                                      is_ap, sta, &sta_id);
 709         if (ret) {
 710                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 711                         sta->addr, ret);
 712                 /* Should we return success if return code is EEXIST ? */
 713                 goto out;
 714         }
 715
 716         sta_priv->sta_id = sta_id;
 717
 718         /* Initialize rate scaling */
 719         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
 720                        sta->addr);
 721         iwl_rs_rate_init(priv, sta, sta_id);
 722  out:
 723         mutex_unlock(&priv->shrd->mutex);
 724         IWL_DEBUG_MAC80211(priv, "leave\n");
 725
 726         return ret;
 727 }
 728
 729 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 730                                 struct ieee80211_channel_switch *ch_switch)
 731 {
 732         struct iwl_priv *priv = hw->priv;
 733         const struct iwl_channel_info *ch_info;
 734         struct ieee80211_conf *conf = &hw->conf;
 735         struct ieee80211_channel *channel = ch_switch->channel;
 736         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 737         /*
 738          * MULTI-FIXME
 739          * When we add support for multiple interfaces, we need to
 740          * revisit this. The channel switch command in the device
 741          * only affects the BSS context, but what does that really
 742          * mean? And what if we get a CSA on the second interface?
 743          * This needs a lot of work.
 744          */
 745         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 746         u16 ch;
 747
 748         IWL_DEBUG_MAC80211(priv, "enter\n");
 749
 750         mutex_lock(&priv->shrd->mutex);
 751
 752         if (iwl_is_rfkill(priv->shrd))
 753                 goto out;
 754
 755         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 756             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 757             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 758                 goto out;
 759
 760         if (!iwl_is_associated_ctx(ctx))
 761                 goto out;
 762
 763         if (!cfg(priv)->lib->set_channel_switch)
 764                 goto out;
 765
 766         ch = channel->hw_value;
 767         if (le16_to_cpu(ctx->active.channel) == ch)
 768                 goto out;
 769
 770         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 771         if (!is_channel_valid(ch_info)) {
 772                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 773                 goto out;
 774         }
 775
 776         spin_lock_irq(&priv->shrd->lock);
 777
 778         priv->current_ht_config.smps = conf->smps_mode;
 779
 780         /* Configure HT40 channels */
 781         ctx->ht.enabled = conf_is_ht(conf);
 782         if (ctx->ht.enabled)
 783                 iwlagn_config_ht40(conf, ctx);
 784         else
 785                 ctx->ht.is_40mhz = false;
 786
 787         if ((le16_to_cpu(ctx->staging.channel) != ch))
 788                 ctx->staging.flags = 0;
 789
 790         iwl_set_rxon_channel(priv, channel, ctx);
 791         iwl_set_rxon_ht(priv, ht_conf);
 792         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 793
 794         spin_unlock_irq(&priv->shrd->lock);
 795
 796         iwl_set_rate(priv);
 797         /*
 798          * at this point, staging_rxon has the
 799          * configuration for channel switch
 800          */
 801         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 802         priv->switch_channel = cpu_to_le16(ch);
 803         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 804                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 805                 priv->switch_channel = 0;
 806                 ieee80211_chswitch_done(ctx->vif, false);
 807         }
 808
 809 out:
 810         mutex_unlock(&priv->shrd->mutex);
 811         IWL_DEBUG_MAC80211(priv, "leave\n");
 812 }
 813
 814 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 815                                     unsigned int changed_flags,
 816                                     unsigned int *total_flags,
 817                                     u64 multicast)
 818 {
 819         struct iwl_priv *priv = hw->priv;
 820         __le32 filter_or = 0, filter_nand = 0;
 821         struct iwl_rxon_context *ctx;
 822
 823 #define CHK(test, flag) do { \
 824         if (*total_flags & (test))              \
 825                 filter_or |= (flag);            \
 826         else                                    \
 827                 filter_nand |= (flag);          \
 828         } while (0)
 829
 830         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 831                         changed_flags, *total_flags);
 832
 833         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 834         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 835         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 836         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 837
 838 #undef CHK
 839
 840         mutex_lock(&priv->shrd->mutex);
 841
 842         for_each_context(priv, ctx) {
 843                 ctx->staging.filter_flags &= ~filter_nand;
 844                 ctx->staging.filter_flags |= filter_or;
 845
 846                 /*
 847                  * Not committing directly because hardware can perform a scan,
 848                  * but we'll eventually commit the filter flags change anyway.
 849                  */
 850         }
 851
 852         mutex_unlock(&priv->shrd->mutex);
 853
 854         /*
 855          * Receiving all multicast frames is always enabled by the
 856          * default flags setup in iwl_connection_init_rx_config()
 857          * since we currently do not support programming multicast
 858          * filters into the device.
 859          */
 860         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 861                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 862 }
 863
 864 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 865 {
 866         struct iwl_priv *priv = hw->priv;
 867
 868         mutex_lock(&priv->shrd->mutex);
 869         IWL_DEBUG_MAC80211(priv, "enter\n");
 870
 871         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 872                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 873                 goto done;
 874         }
 875         if (iwl_is_rfkill(priv->shrd)) {
 876                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 877                 goto done;
 878         }
 879
 880         /*
 881          * mac80211 will not push any more frames for transmit
 882          * until the flush is completed
 883          */
 884         if (drop) {
 885                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 886                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 887                         IWL_ERR(priv, "flush request fail\n");
 888                         goto done;
 889                 }
 890         }
 891         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 892         iwl_trans_wait_tx_queue_empty(trans(priv));
 893 done:
 894         mutex_unlock(&priv->shrd->mutex);
 895         IWL_DEBUG_MAC80211(priv, "leave\n");
 896 }
 897
 898 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 899                                      struct ieee80211_channel *channel,
 900                                      enum nl80211_channel_type channel_type,
 901                                      int duration)
 902 {
 903         struct iwl_priv *priv = hw->priv;
 904         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 905         int err = 0;
 906
 907         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 908                 return -EOPNOTSUPP;
 909
 910         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 911                 return -EOPNOTSUPP;
 912
 913         IWL_DEBUG_MAC80211(priv, "enter\n");
 914         mutex_lock(&priv->shrd->mutex);
 915
 916         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 917                 err = -EBUSY;
 918                 goto out;
 919         }
 920
 921         priv->hw_roc_channel = channel;
 922         priv->hw_roc_chantype = channel_type;
 923         /* convert from ms to TU */
 924         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 925         priv->hw_roc_start_notified = false;
 926         cancel_delayed_work(&priv->hw_roc_disable_work);
 927
 928         if (!ctx->is_active) {
 929                 static const struct iwl_qos_info default_qos_data = {
 930                         .def_qos_parm = {
 931                                 .ac[0] = {
 932                                         .cw_min = cpu_to_le16(3),
 933                                         .cw_max = cpu_to_le16(7),
 934                                         .aifsn = 2,
 935                                         .edca_txop = cpu_to_le16(1504),
 936                                 },
 937                                 .ac[1] = {
 938                                         .cw_min = cpu_to_le16(7),
 939                                         .cw_max = cpu_to_le16(15),
 940                                         .aifsn = 2,
 941                                         .edca_txop = cpu_to_le16(3008),
 942                                 },
 943                                 .ac[2] = {
 944                                         .cw_min = cpu_to_le16(15),
 945                                         .cw_max = cpu_to_le16(1023),
 946                                         .aifsn = 3,
 947                                 },
 948                                 .ac[3] = {
 949                                         .cw_min = cpu_to_le16(15),
 950                                         .cw_max = cpu_to_le16(1023),
 951                                         .aifsn = 7,
 952                                 },
 953                         },
 954                 };
 955
 956                 ctx->is_active = true;
 957                 ctx->qos_data = default_qos_data;
 958                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 959                 memcpy(ctx->staging.node_addr,
 960                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 961                        ETH_ALEN);
 962                 memcpy(ctx->staging.bssid_addr,
 963                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 964                        ETH_ALEN);
 965                 err = iwlagn_commit_rxon(priv, ctx);
 966                 if (err)
 967                         goto out;
 968                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
 969                                              RXON_FILTER_PROMISC_MSK |
 970                                              RXON_FILTER_CTL2HOST_MSK;
 971
 972                 err = iwlagn_commit_rxon(priv, ctx);
 973                 if (err) {
 974                         iwlagn_disable_roc(priv);
 975                         goto out;
 976                 }
 977                 priv->hw_roc_setup = true;
 978         }
 979
 980         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
 981         if (err)
 982                 iwlagn_disable_roc(priv);
 983
 984  out:
 985         mutex_unlock(&priv->shrd->mutex);
 986         IWL_DEBUG_MAC80211(priv, "leave\n");
 987
 988         return err;
 989 }
 990
 991 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
 992 {
 993         struct iwl_priv *priv = hw->priv;
 994
 995         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 996                 return -EOPNOTSUPP;
 997
 998         IWL_DEBUG_MAC80211(priv, "enter\n");
 999         mutex_lock(&priv->shrd->mutex);
1000         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1001         iwlagn_disable_roc(priv);
1002         mutex_unlock(&priv->shrd->mutex);
1003         IWL_DEBUG_MAC80211(priv, "leave\n");
1004
1005         return 0;
1006 }
1007
1008 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1009                               struct ieee80211_vif *vif,
1010                               const u8 *bssid,
1011                               enum ieee80211_tx_sync_type type)
1012 {
1013         struct iwl_priv *priv = hw->priv;
1014         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1015         struct iwl_rxon_context *ctx = vif_priv->ctx;
1016         int ret;
1017         u8 sta_id;
1018
1019         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1020                 return 0;
1021
1022         IWL_DEBUG_MAC80211(priv, "enter\n");
1023         mutex_lock(&priv->shrd->mutex);
1024
1025         if (iwl_is_associated_ctx(ctx)) {
1026                 ret = 0;
1027                 goto out;
1028         }
1029
1030         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1031             &priv->shrd->status)) {
1032                 ret = -EBUSY;
1033                 goto out;
1034         }
1035
1036         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1037         if (ret)
1038                 goto out;
1039
1040         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1041                 ret = -EIO;
1042                 goto out_remove_sta;
1043         }
1044
1045         memcpy(ctx->bssid, bssid, ETH_ALEN);
1046         ctx->preauth_bssid = true;
1047
1048         ret = iwlagn_commit_rxon(priv, ctx);
1049
1050         if (ret == 0)
1051                 goto out;
1052
1053  out_remove_sta:
1054         iwl_remove_station(priv, sta_id, bssid);
1055  out:
1056         mutex_unlock(&priv->shrd->mutex);
1057         IWL_DEBUG_MAC80211(priv, "leave\n");
1058
1059         return ret;
1060 }
1061
1062 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1063                                    struct ieee80211_vif *vif,
1064                                    const u8 *bssid,
1065                                    enum ieee80211_tx_sync_type type)
1066 {
1067         struct iwl_priv *priv = hw->priv;
1068         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1069         struct iwl_rxon_context *ctx = vif_priv->ctx;
1070
1071         if (ctx->ctxid != IWL_RXON_CTX_PAN)
1072                 return;
1073
1074         IWL_DEBUG_MAC80211(priv, "enter\n");
1075         mutex_lock(&priv->shrd->mutex);
1076
1077         if (iwl_is_associated_ctx(ctx))
1078                 goto out;
1079
1080         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1081         ctx->preauth_bssid = false;
1082         /* no need to commit */
1083  out:
1084         mutex_unlock(&priv->shrd->mutex);
1085         IWL_DEBUG_MAC80211(priv, "leave\n");
1086 }
1087
1088 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1089                            enum ieee80211_rssi_event rssi_event)
1090 {
1091         struct iwl_priv *priv = hw->priv;
1092
1093         IWL_DEBUG_MAC80211(priv, "enter\n");
1094         mutex_lock(&priv->shrd->mutex);
1095
1096         if (cfg(priv)->bt_params &&
1097                         cfg(priv)->bt_params->advanced_bt_coexist) {
1098                 if (rssi_event == RSSI_EVENT_LOW)
1099                         priv->bt_enable_pspoll = true;
1100                 else if (rssi_event == RSSI_EVENT_HIGH)
1101                         priv->bt_enable_pspoll = false;
1102
1103                 iwlagn_send_advance_bt_config(priv);
1104         } else {
1105                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1106                                 "ignoring RSSI callback\n");
1107         }
1108
1109         mutex_unlock(&priv->shrd->mutex);
1110         IWL_DEBUG_MAC80211(priv, "leave\n");
1111 }
1112
1113 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1114                            struct ieee80211_sta *sta, bool set)
1115 {
1116         struct iwl_priv *priv = hw->priv;
1117
1118         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1119
1120         return 0;
1121 }
1122
1123 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1124                     struct ieee80211_vif *vif, u16 queue,
1125                     const struct ieee80211_tx_queue_params *params)
1126 {
1127         struct iwl_priv *priv = hw->priv;
1128         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1129         struct iwl_rxon_context *ctx = vif_priv->ctx;
1130         unsigned long flags;
1131         int q;
1132
1133         if (WARN_ON(!ctx))
1134                 return -EINVAL;
1135
1136         IWL_DEBUG_MAC80211(priv, "enter\n");
1137
1138         if (!iwl_is_ready_rf(priv->shrd)) {
1139                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1140                 return -EIO;
1141         }
1142
1143         if (queue >= AC_NUM) {
1144                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1145                 return 0;
1146         }
1147
1148         q = AC_NUM - 1 - queue;
1149
1150         spin_lock_irqsave(&priv->shrd->lock, flags);
1151
1152         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1153                 cpu_to_le16(params->cw_min);
1154         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1155                 cpu_to_le16(params->cw_max);
1156         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1157         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1158                         cpu_to_le16((params->txop * 32));
1159
1160         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1161
1162         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1163
1164         IWL_DEBUG_MAC80211(priv, "leave\n");
1165         return 0;
1166 }
1167
1168 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1169 {
1170         struct iwl_priv *priv = hw->priv;
1171
1172         return priv->ibss_manager == IWL_IBSS_MANAGER;
1173 }
1174
1175 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1176 {
1177         iwl_connection_init_rx_config(priv, ctx);
1178
1179         iwlagn_set_rxon_chain(priv, ctx);
1180
1181         return iwlagn_commit_rxon(priv, ctx);
1182 }
1183
1184 static int iwl_setup_interface(struct iwl_priv *priv,
1185                                struct iwl_rxon_context *ctx)
1186 {
1187         struct ieee80211_vif *vif = ctx->vif;
1188         int err;
1189
1190         lockdep_assert_held(&priv->shrd->mutex);
1191
1192         /*
1193          * This variable will be correct only when there's just
1194          * a single context, but all code using it is for hardware
1195          * that supports only one context.
1196          */
1197         priv->iw_mode = vif->type;
1198
1199         ctx->is_active = true;
1200
1201         err = iwl_set_mode(priv, ctx);
1202         if (err) {
1203                 if (!ctx->always_active)
1204                         ctx->is_active = false;
1205                 return err;
1206         }
1207
1208         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1209             vif->type == NL80211_IFTYPE_ADHOC) {
1210                 /*
1211                  * pretend to have high BT traffic as long as we
1212                  * are operating in IBSS mode, as this will cause
1213                  * the rate scaling etc. to behave as intended.
1214                  */
1215                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1216         }
1217
1218         return 0;
1219 }
1220
1221 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1222                              struct ieee80211_vif *vif)
1223 {
1224         struct iwl_priv *priv = hw->priv;
1225         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1226         struct iwl_rxon_context *tmp, *ctx = NULL;
1227         int err;
1228         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1229         bool reset = false;
1230
1231         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1232                            viftype, vif->addr);
1233
1234         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1235
1236         mutex_lock(&priv->shrd->mutex);
1237
1238         iwlagn_disable_roc(priv);
1239
1240         if (!iwl_is_ready_rf(priv->shrd)) {
1241                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1242                 err = -EINVAL;
1243                 goto out;
1244         }
1245
1246         for_each_context(priv, tmp) {
1247                 u32 possible_modes =
1248                         tmp->interface_modes | tmp->exclusive_interface_modes;
1249
1250                 if (tmp->vif) {
1251                         /* On reset we need to add the same interface again */
1252                         if (tmp->vif == vif) {
1253                                 reset = true;
1254                                 ctx = tmp;
1255                                 break;
1256                         }
1257
1258                         /* check if this busy context is exclusive */
1259                         if (tmp->exclusive_interface_modes &
1260                                                 BIT(tmp->vif->type)) {
1261                                 err = -EINVAL;
1262                                 goto out;
1263                         }
1264                         continue;
1265                 }
1266
1267                 if (!(possible_modes & BIT(viftype)))
1268                         continue;
1269
1270                 /* have maybe usable context w/o interface */
1271                 ctx = tmp;
1272                 break;
1273         }
1274
1275         if (!ctx) {
1276                 err = -EOPNOTSUPP;
1277                 goto out;
1278         }
1279
1280         vif_priv->ctx = ctx;
1281         ctx->vif = vif;
1282
1283         err = iwl_setup_interface(priv, ctx);
1284         if (!err || reset)
1285                 goto out;
1286
1287         ctx->vif = NULL;
1288         priv->iw_mode = NL80211_IFTYPE_STATION;
1289  out:
1290         mutex_unlock(&priv->shrd->mutex);
1291
1292         IWL_DEBUG_MAC80211(priv, "leave\n");
1293         return err;
1294 }
1295
1296 static void iwl_teardown_interface(struct iwl_priv *priv,
1297                                    struct ieee80211_vif *vif,
1298                                    bool mode_change)
1299 {
1300         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1301
1302         lockdep_assert_held(&priv->shrd->mutex);
1303
1304         if (priv->scan_vif == vif) {
1305                 iwl_scan_cancel_timeout(priv, 200);
1306                 iwl_force_scan_end(priv);
1307         }
1308
1309         if (!mode_change) {
1310                 iwl_set_mode(priv, ctx);
1311                 if (!ctx->always_active)
1312                         ctx->is_active = false;
1313         }
1314
1315         /*
1316          * When removing the IBSS interface, overwrite the
1317          * BT traffic load with the stored one from the last
1318          * notification, if any. If this is a device that
1319          * doesn't implement this, this has no effect since
1320          * both values are the same and zero.
1321          */
1322         if (vif->type == NL80211_IFTYPE_ADHOC)
1323                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1324 }
1325
1326 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1327                               struct ieee80211_vif *vif)
1328 {
1329         struct iwl_priv *priv = hw->priv;
1330         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1331
1332         IWL_DEBUG_MAC80211(priv, "enter\n");
1333
1334         mutex_lock(&priv->shrd->mutex);
1335
1336         if (WARN_ON(ctx->vif != vif)) {
1337                 struct iwl_rxon_context *tmp;
1338                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1339                 for_each_context(priv, tmp)
1340                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1341                                 tmp->ctxid, tmp, tmp->vif);
1342         }
1343         ctx->vif = NULL;
1344
1345         iwl_teardown_interface(priv, vif, false);
1346
1347         mutex_unlock(&priv->shrd->mutex);
1348
1349         IWL_DEBUG_MAC80211(priv, "leave\n");
1350
1351 }
1352
1353 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1354                                 struct ieee80211_vif *vif,
1355                                 enum nl80211_iftype newtype, bool newp2p)
1356 {
1357         struct iwl_priv *priv = hw->priv;
1358         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1359         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1360         struct iwl_rxon_context *tmp;
1361         enum nl80211_iftype newviftype = newtype;
1362         u32 interface_modes;
1363         int err;
1364
1365         IWL_DEBUG_MAC80211(priv, "enter\n");
1366
1367         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1368
1369         mutex_lock(&priv->shrd->mutex);
1370
1371         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1372                 /*
1373                  * Huh? But wait ... this can maybe happen when
1374                  * we're in the middle of a firmware restart!
1375                  */
1376                 err = -EBUSY;
1377                 goto out;
1378         }
1379
1380         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1381
1382         if (!(interface_modes & BIT(newtype))) {
1383                 err = -EBUSY;
1384                 goto out;
1385         }
1386
1387         /*
1388          * Refuse a change that should be done by moving from the PAN
1389          * context to the BSS context instead, if the BSS context is
1390          * available and can support the new interface type.
1391          */
1392         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1393             (bss_ctx->interface_modes & BIT(newtype) ||
1394              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1395                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1396                 err = -EBUSY;
1397                 goto out;
1398         }
1399
1400         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1401                 for_each_context(priv, tmp) {
1402                         if (ctx == tmp)
1403                                 continue;
1404
1405                         if (!tmp->vif)
1406                                 continue;
1407
1408                         /*
1409                          * The current mode switch would be exclusive, but
1410                          * another context is active ... refuse the switch.
1411                          */
1412                         err = -EBUSY;
1413                         goto out;
1414                 }
1415         }
1416
1417         /* success */
1418         iwl_teardown_interface(priv, vif, true);
1419         vif->type = newviftype;
1420         vif->p2p = newp2p;
1421         err = iwl_setup_interface(priv, ctx);
1422         WARN_ON(err);
1423         /*
1424          * We've switched internally, but submitting to the
1425          * device may have failed for some reason. Mask this
1426          * error, because otherwise mac80211 will not switch
1427          * (and set the interface type back) and we'll be
1428          * out of sync with it.
1429          */
1430         err = 0;
1431
1432  out:
1433         mutex_unlock(&priv->shrd->mutex);
1434         IWL_DEBUG_MAC80211(priv, "leave\n");
1435
1436         return err;
1437 }
1438
1439 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1440                     struct ieee80211_vif *vif,
1441                     struct cfg80211_scan_request *req)
1442 {
1443         struct iwl_priv *priv = hw->priv;
1444         int ret;
1445
1446         IWL_DEBUG_MAC80211(priv, "enter\n");
1447
1448         if (req->n_channels == 0)
1449                 return -EINVAL;
1450
1451         mutex_lock(&priv->shrd->mutex);
1452
1453         /*
1454          * If an internal scan is in progress, just set
1455          * up the scan_request as per above.
1456          */
1457         if (priv->scan_type != IWL_SCAN_NORMAL) {
1458                 IWL_DEBUG_SCAN(priv,
1459                                "SCAN request during internal scan - defer\n");
1460                 priv->scan_request = req;
1461                 priv->scan_vif = vif;
1462                 ret = 0;
1463         } else {
1464                 priv->scan_request = req;
1465                 priv->scan_vif = vif;
1466                 /*
1467                  * mac80211 will only ask for one band at a time
1468                  * so using channels[0] here is ok
1469                  */
1470                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1471                                         req->channels[0]->band);
1472                 if (ret) {
1473                         priv->scan_request = NULL;
1474                         priv->scan_vif = NULL;
1475                 }
1476         }
1477
1478         IWL_DEBUG_MAC80211(priv, "leave\n");
1479
1480         mutex_unlock(&priv->shrd->mutex);
1481
1482         return ret;
1483 }
1484
1485 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1486                        struct ieee80211_vif *vif,
1487                        struct ieee80211_sta *sta)
1488 {
1489         struct iwl_priv *priv = hw->priv;
1490         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1491         int ret;
1492
1493         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1494                            "station %pM\n", sta->addr);
1495         mutex_lock(&priv->shrd->mutex);
1496         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1497                         sta->addr);
1498         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1499         if (ret)
1500                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1501                         sta->addr);
1502         mutex_unlock(&priv->shrd->mutex);
1503         IWL_DEBUG_MAC80211(priv, "leave\n");
1504
1505         return ret;
1506 }
1507
1508 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1509 {
1510         unsigned long flags;
1511
1512         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1513         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1514         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1515         priv->stations[sta_id].sta.sta.modify_mask = 0;
1516         priv->stations[sta_id].sta.sleep_tx_count = 0;
1517         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1518         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1519         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1520
1521 }
1522
1523 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1524                            struct ieee80211_vif *vif,
1525                            enum sta_notify_cmd cmd,
1526                            struct ieee80211_sta *sta)
1527 {
1528         struct iwl_priv *priv = hw->priv;
1529         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1530         int sta_id;
1531
1532         IWL_DEBUG_MAC80211(priv, "enter\n");
1533
1534         switch (cmd) {
1535         case STA_NOTIFY_SLEEP:
1536                 WARN_ON(!sta_priv->client);
1537                 sta_priv->asleep = true;
1538                 if (atomic_read(&sta_priv->pending_frames) > 0)
1539                         ieee80211_sta_block_awake(hw, sta, true);
1540                 break;
1541         case STA_NOTIFY_AWAKE:
1542                 WARN_ON(!sta_priv->client);
1543                 if (!sta_priv->asleep)
1544                         break;
1545                 sta_priv->asleep = false;
1546                 sta_id = iwl_sta_id(sta);
1547                 if (sta_id != IWL_INVALID_STATION)
1548                         iwl_sta_modify_ps_wake(priv, sta_id);
1549                 break;
1550         default:
1551                 break;
1552         }
1553         IWL_DEBUG_MAC80211(priv, "leave\n");
1554 }
1555
1556 struct ieee80211_ops iwlagn_hw_ops = {
1557         .tx = iwlagn_mac_tx,
1558         .start = iwlagn_mac_start,
1559         .stop = iwlagn_mac_stop,
1560 #ifdef CONFIG_PM_SLEEP
1561         .suspend = iwlagn_mac_suspend,
1562         .resume = iwlagn_mac_resume,
1563 #endif
1564         .add_interface = iwlagn_mac_add_interface,
1565         .remove_interface = iwlagn_mac_remove_interface,
1566         .change_interface = iwlagn_mac_change_interface,
1567         .config = iwlagn_mac_config,
1568         .configure_filter = iwlagn_configure_filter,
1569         .set_key = iwlagn_mac_set_key,
1570         .update_tkip_key = iwlagn_mac_update_tkip_key,
1571         .set_rekey_data = iwlagn_mac_set_rekey_data,
1572         .conf_tx = iwlagn_mac_conf_tx,
1573         .bss_info_changed = iwlagn_bss_info_changed,
1574         .ampdu_action = iwlagn_mac_ampdu_action,
1575         .hw_scan = iwlagn_mac_hw_scan,
1576         .sta_notify = iwlagn_mac_sta_notify,
1577         .sta_add = iwlagn_mac_sta_add,
1578         .sta_remove = iwlagn_mac_sta_remove,
1579         .channel_switch = iwlagn_mac_channel_switch,
1580         .flush = iwlagn_mac_flush,
1581         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1582         .remain_on_channel = iwlagn_mac_remain_on_channel,
1583         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1584         .rssi_callback = iwlagn_mac_rssi_callback,
1585         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1586         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1587         .tx_sync = iwlagn_mac_tx_sync,
1588         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1589         .set_tim = iwlagn_mac_set_tim,
1590 };
1591
1592 /* This function both allocates and initializes hw and priv. */
1593 struct ieee80211_hw *iwl_alloc_all(void)
1594 {
1595         struct iwl_priv *priv;
1596         /* mac80211 allocates memory for this device instance, including
1597          *   space for this driver's private structure */
1598         struct ieee80211_hw *hw;
1599
1600         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1601         if (!hw)
1602                 goto out;
1603
1604         priv = hw->priv;
1605         priv->hw = hw;
1606
1607 out:
1608         return hw;
1609 }