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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-eeprom.h"
  46 #include "iwl-dev.h"
  47 #include "iwl-core.h"
  48 #include "iwl-io.h"
  49 #include "iwl-agn-calib.h"
  50 #include "iwl-agn.h"
  51 #include "iwl-shared.h"
  52 #include "iwl-trans.h"
  53 #include "iwl-op-mode.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_PERIOD |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 151
 152         /*
 153          * Including the following line will crash some AP's.  This
 154          * workaround removes the stimulus which causes the crash until
 155          * the AP software can be fixed.
 156         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 157          */
 158
 159         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 160                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 161
 162         if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
 163                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 164                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 165
 166 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
 167         /* enable 11w if the uCode advertise */
 168         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 169 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
 170                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 171
 172         hw->sta_data_size = sizeof(struct iwl_station_priv);
 173         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 174
 175         for_each_context(priv, ctx) {
 176                 hw->wiphy->interface_modes |= ctx->interface_modes;
 177                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 178         }
 179
 180         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 181
 182         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 183                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 184                 hw->wiphy->n_iface_combinations =
 185                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 186         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 187                 hw->wiphy->iface_combinations =
 188                         iwlagn_iface_combinations_dualmode;
 189                 hw->wiphy->n_iface_combinations =
 190                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 191         }
 192
 193         hw->wiphy->max_remain_on_channel_duration = 1000;
 194
 195         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 196                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 197                             WIPHY_FLAG_IBSS_RSN;
 198
 199         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 200             trans(priv)->ops->wowlan_suspend &&
 201             device_can_wakeup(trans(priv)->dev)) {
 202                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 203                                           WIPHY_WOWLAN_DISCONNECT |
 204                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 205                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 206                 if (!iwlagn_mod_params.sw_crypto)
 207                         hw->wiphy->wowlan.flags |=
 208                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 209                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 210
 211                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 212                 hw->wiphy->wowlan.pattern_min_len =
 213                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 214                 hw->wiphy->wowlan.pattern_max_len =
 215                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 216         }
 217
 218         if (iwlagn_mod_params.power_save)
 219                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 220         else
 221                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 222
 223         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 224         /* we create the 802.11 header and a zero-length SSID element */
 225         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 226
 227         /* Default value; 4 EDCA QOS priorities */
 228         hw->queues = 4;
 229
 230         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 231
 232         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 233                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 234                         &priv->bands[IEEE80211_BAND_2GHZ];
 235         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 236                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 237                         &priv->bands[IEEE80211_BAND_5GHZ];
 238
 239         hw->wiphy->hw_version = trans(priv)->hw_id;
 240
 241         iwl_leds_init(priv);
 242
 243         ret = ieee80211_register_hw(priv->hw);
 244         if (ret) {
 245                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 246                 return ret;
 247         }
 248         priv->mac80211_registered = 1;
 249
 250         return 0;
 251 }
 252
 253 void iwlagn_mac_unregister(struct iwl_priv *priv)
 254 {
 255         if (!priv->mac80211_registered)
 256                 return;
 257         iwl_leds_exit(priv);
 258         ieee80211_unregister_hw(priv->hw);
 259         priv->mac80211_registered = 0;
 260 }
 261
 262 static int __iwl_up(struct iwl_priv *priv)
 263 {
 264         struct iwl_rxon_context *ctx;
 265         int ret;
 266
 267         lockdep_assert_held(&priv->mutex);
 268
 269         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 270                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 271                 return -EIO;
 272         }
 273
 274         for_each_context(priv, ctx) {
 275                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 276                 if (ret) {
 277                         iwl_dealloc_bcast_stations(priv);
 278                         return ret;
 279                 }
 280         }
 281
 282         ret = iwl_run_init_ucode(priv);
 283         if (ret) {
 284                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 285                 goto error;
 286         }
 287
 288         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 289         if (ret) {
 290                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 291                 goto error;
 292         }
 293
 294         ret = iwl_alive_start(priv);
 295         if (ret)
 296                 goto error;
 297         return 0;
 298
 299  error:
 300         set_bit(STATUS_EXIT_PENDING, &priv->status);
 301         iwl_down(priv);
 302         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 303
 304         IWL_ERR(priv, "Unable to initialize device.\n");
 305         return ret;
 306 }
 307
 308 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 309 {
 310         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 311         int ret;
 312
 313         IWL_DEBUG_MAC80211(priv, "enter\n");
 314
 315         /* we should be verifying the device is ready to be opened */
 316         mutex_lock(&priv->mutex);
 317         ret = __iwl_up(priv);
 318         mutex_unlock(&priv->mutex);
 319         if (ret)
 320                 return ret;
 321
 322         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 323
 324         /* Now we should be done, and the READY bit should be set. */
 325         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 326                 ret = -EIO;
 327
 328         iwlagn_led_enable(priv);
 329
 330         priv->is_open = 1;
 331         IWL_DEBUG_MAC80211(priv, "leave\n");
 332         return 0;
 333 }
 334
 335 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 336 {
 337         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 338
 339         IWL_DEBUG_MAC80211(priv, "enter\n");
 340
 341         if (!priv->is_open)
 342                 return;
 343
 344         priv->is_open = 0;
 345
 346         mutex_lock(&priv->mutex);
 347         iwl_down(priv);
 348         mutex_unlock(&priv->mutex);
 349
 350         iwl_cancel_deferred_work(priv);
 351
 352         flush_workqueue(priv->workqueue);
 353
 354         /* User space software may expect getting rfkill changes
 355          * even if interface is down, trans->down will leave the RF
 356          * kill interrupt enabled
 357          */
 358         iwl_trans_stop_hw(trans(priv));
 359
 360         IWL_DEBUG_MAC80211(priv, "leave\n");
 361 }
 362
 363 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 364                                       struct ieee80211_vif *vif,
 365                                       struct cfg80211_gtk_rekey_data *data)
 366 {
 367         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 368
 369         if (iwlagn_mod_params.sw_crypto)
 370                 return;
 371
 372         IWL_DEBUG_MAC80211(priv, "enter\n");
 373         mutex_lock(&priv->mutex);
 374
 375         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 376                 goto out;
 377
 378         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 379         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 380         priv->replay_ctr =
 381                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 382         priv->have_rekey_data = true;
 383
 384  out:
 385         mutex_unlock(&priv->mutex);
 386         IWL_DEBUG_MAC80211(priv, "leave\n");
 387 }
 388
 389 #ifdef CONFIG_PM_SLEEP
 390
 391 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 392                               struct cfg80211_wowlan *wowlan)
 393 {
 394         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 395         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 396         int ret;
 397
 398         if (WARN_ON(!wowlan))
 399                 return -EINVAL;
 400
 401         IWL_DEBUG_MAC80211(priv, "enter\n");
 402         mutex_lock(&priv->mutex);
 403
 404         /* Don't attempt WoWLAN when not associated, tear down instead. */
 405         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 406             !iwl_is_associated_ctx(ctx)) {
 407                 ret = 1;
 408                 goto out;
 409         }
 410
 411         ret = iwlagn_suspend(priv, wowlan);
 412         if (ret)
 413                 goto error;
 414
 415         device_set_wakeup_enable(trans(priv)->dev, true);
 416
 417         iwl_trans_wowlan_suspend(trans(priv));
 418
 419         goto out;
 420
 421  error:
 422         priv->wowlan = false;
 423         iwlagn_prepare_restart(priv);
 424         ieee80211_restart_hw(priv->hw);
 425  out:
 426         mutex_unlock(&priv->mutex);
 427         IWL_DEBUG_MAC80211(priv, "leave\n");
 428
 429         return ret;
 430 }
 431
 432 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 433 {
 434         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 435         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 436         struct ieee80211_vif *vif;
 437         unsigned long flags;
 438         u32 base, status = 0xffffffff;
 439         int ret = -EIO;
 440         const struct fw_img *img;
 441
 442         IWL_DEBUG_MAC80211(priv, "enter\n");
 443         mutex_lock(&priv->mutex);
 444
 445         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 446                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 447
 448         base = priv->shrd->device_pointers.error_event_table;
 449         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 450                 spin_lock_irqsave(&trans(priv)->reg_lock, flags);
 451                 ret = iwl_grab_nic_access_silent(trans(priv));
 452                 if (likely(ret == 0)) {
 453                         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base);
 454                         status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 455                         iwl_release_nic_access(trans(priv));
 456                 }
 457                 spin_unlock_irqrestore(&trans(priv)->reg_lock, flags);
 458
 459 #ifdef CONFIG_IWLWIFI_DEBUGFS
 460                 if (ret == 0) {
 461                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 462                         if (!priv->wowlan_sram) {
 463                                 priv->wowlan_sram =
 464                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 465                                                 GFP_KERNEL);
 466                         }
 467
 468                         if (priv->wowlan_sram)
 469                                 _iwl_read_targ_mem_words(
 470                                       trans(priv), 0x800000,
 471                                       priv->wowlan_sram,
 472                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 473                 }
 474 #endif
 475         }
 476
 477         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 478         vif = ctx->vif;
 479
 480         priv->wowlan = false;
 481
 482         device_set_wakeup_enable(trans(priv)->dev, false);
 483
 484         iwlagn_prepare_restart(priv);
 485
 486         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 487         iwl_connection_init_rx_config(priv, ctx);
 488         iwlagn_set_rxon_chain(priv, ctx);
 489
 490         mutex_unlock(&priv->mutex);
 491         IWL_DEBUG_MAC80211(priv, "leave\n");
 492
 493         ieee80211_resume_disconnect(vif);
 494
 495         return 1;
 496 }
 497
 498 #endif
 499
 500 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 501 {
 502         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 503
 504         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 505                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 506
 507         if (iwlagn_tx_skb(priv, skb))
 508                 dev_kfree_skb_any(skb);
 509 }
 510
 511 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 512                                        struct ieee80211_vif *vif,
 513                                        struct ieee80211_key_conf *keyconf,
 514                                        struct ieee80211_sta *sta,
 515                                        u32 iv32, u16 *phase1key)
 516 {
 517         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 518
 519         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 520 }
 521
 522 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 523                               struct ieee80211_vif *vif,
 524                               struct ieee80211_sta *sta,
 525                               struct ieee80211_key_conf *key)
 526 {
 527         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 528         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 529         struct iwl_rxon_context *ctx = vif_priv->ctx;
 530         int ret;
 531         bool is_default_wep_key = false;
 532
 533         IWL_DEBUG_MAC80211(priv, "enter\n");
 534
 535         if (iwlagn_mod_params.sw_crypto) {
 536                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 537                 return -EOPNOTSUPP;
 538         }
 539
 540         switch (key->cipher) {
 541         case WLAN_CIPHER_SUITE_TKIP:
 542                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 543                 /* fall through */
 544         case WLAN_CIPHER_SUITE_CCMP:
 545                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 546                 break;
 547         default:
 548                 break;
 549         }
 550
 551         /*
 552          * We could program these keys into the hardware as well, but we
 553          * don't expect much multicast traffic in IBSS and having keys
 554          * for more stations is probably more useful.
 555          *
 556          * Mark key TX-only and return 0.
 557          */
 558         if (vif->type == NL80211_IFTYPE_ADHOC &&
 559             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 560                 key->hw_key_idx = WEP_INVALID_OFFSET;
 561                 return 0;
 562         }
 563
 564         /* If they key was TX-only, accept deletion */
 565         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 566                 return 0;
 567
 568         mutex_lock(&priv->mutex);
 569         iwl_scan_cancel_timeout(priv, 100);
 570
 571         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 572
 573         /*
 574          * If we are getting WEP group key and we didn't receive any key mapping
 575          * so far, we are in legacy wep mode (group key only), otherwise we are
 576          * in 1X mode.
 577          * In legacy wep mode, we use another host command to the uCode.
 578          */
 579         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 580              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 581                 if (cmd == SET_KEY)
 582                         is_default_wep_key = !ctx->key_mapping_keys;
 583                 else
 584                         is_default_wep_key =
 585                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 586         }
 587
 588
 589         switch (cmd) {
 590         case SET_KEY:
 591                 if (is_default_wep_key) {
 592                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 593                         break;
 594                 }
 595                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 596                 if (ret) {
 597                         /*
 598                          * can't add key for RX, but we don't need it
 599                          * in the device for TX so still return 0
 600                          */
 601                         ret = 0;
 602                         key->hw_key_idx = WEP_INVALID_OFFSET;
 603                 }
 604
 605                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 606                 break;
 607         case DISABLE_KEY:
 608                 if (is_default_wep_key)
 609                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 610                 else
 611                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 612
 613                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 614                 break;
 615         default:
 616                 ret = -EINVAL;
 617         }
 618
 619         mutex_unlock(&priv->mutex);
 620         IWL_DEBUG_MAC80211(priv, "leave\n");
 621
 622         return ret;
 623 }
 624
 625 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 626                                    struct ieee80211_vif *vif,
 627                                    enum ieee80211_ampdu_mlme_action action,
 628                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 629                                    u8 buf_size)
 630 {
 631         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 632         int ret = -EINVAL;
 633         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 634
 635         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 636                      sta->addr, tid);
 637
 638         if (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE))
 639                 return -EACCES;
 640
 641         IWL_DEBUG_MAC80211(priv, "enter\n");
 642         mutex_lock(&priv->mutex);
 643
 644         switch (action) {
 645         case IEEE80211_AMPDU_RX_START:
 646                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 647                         break;
 648                 IWL_DEBUG_HT(priv, "start Rx\n");
 649                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 650                 break;
 651         case IEEE80211_AMPDU_RX_STOP:
 652                 IWL_DEBUG_HT(priv, "stop Rx\n");
 653                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 654                 break;
 655         case IEEE80211_AMPDU_TX_START:
 656                 if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 657                         break;
 658                 IWL_DEBUG_HT(priv, "start Tx\n");
 659                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 660                 break;
 661         case IEEE80211_AMPDU_TX_STOP:
 662                 IWL_DEBUG_HT(priv, "stop Tx\n");
 663                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 664                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 665                         priv->agg_tids_count--;
 666                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 667                                      priv->agg_tids_count);
 668                 }
 669                 if (!priv->agg_tids_count &&
 670                     hw_params(priv).use_rts_for_aggregation) {
 671                         /*
 672                          * switch off RTS/CTS if it was previously enabled
 673                          */
 674                         sta_priv->lq_sta.lq.general_params.flags &=
 675                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 676                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 677                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 678                 }
 679                 break;
 680         case IEEE80211_AMPDU_TX_OPERATIONAL:
 681                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 682                 break;
 683         }
 684         mutex_unlock(&priv->mutex);
 685         IWL_DEBUG_MAC80211(priv, "leave\n");
 686         return ret;
 687 }
 688
 689 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 690                               struct ieee80211_vif *vif,
 691                               struct ieee80211_sta *sta)
 692 {
 693         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 694         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 695         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 696         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 697         int ret;
 698         u8 sta_id;
 699
 700         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 701                         sta->addr);
 702         sta_priv->sta_id = IWL_INVALID_STATION;
 703
 704         atomic_set(&sta_priv->pending_frames, 0);
 705         if (vif->type == NL80211_IFTYPE_AP)
 706                 sta_priv->client = true;
 707
 708         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 709                                      is_ap, sta, &sta_id);
 710         if (ret) {
 711                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 712                         sta->addr, ret);
 713                 /* Should we return success if return code is EEXIST ? */
 714                 return ret;
 715         }
 716
 717         sta_priv->sta_id = sta_id;
 718
 719         return 0;
 720 }
 721
 722 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 723                                  struct ieee80211_vif *vif,
 724                                  struct ieee80211_sta *sta)
 725 {
 726         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 727         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 728         int ret;
 729
 730         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 731
 732         if (vif->type == NL80211_IFTYPE_STATION) {
 733                 /*
 734                  * Station will be removed from device when the RXON
 735                  * is set to unassociated -- just deactivate it here
 736                  * to avoid re-programming it.
 737                  */
 738                 ret = 0;
 739                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 740         } else {
 741                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 742                 if (ret)
 743                         IWL_DEBUG_QUIET_RFKILL(priv,
 744                                 "Error removing station %pM\n", sta->addr);
 745         }
 746         return ret;
 747 }
 748
 749 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 750                                 struct ieee80211_vif *vif,
 751                                 struct ieee80211_sta *sta,
 752                                 enum ieee80211_sta_state old_state,
 753                                 enum ieee80211_sta_state new_state)
 754 {
 755         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 756         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 757         enum {
 758                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 759         } op = NONE;
 760         int ret;
 761
 762         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 763                            sta->addr, old_state, new_state);
 764
 765         mutex_lock(&priv->mutex);
 766         if (vif->type == NL80211_IFTYPE_STATION) {
 767                 if (old_state == IEEE80211_STA_NOTEXIST &&
 768                     new_state == IEEE80211_STA_NONE)
 769                         op = ADD;
 770                 else if (old_state == IEEE80211_STA_NONE &&
 771                          new_state == IEEE80211_STA_NOTEXIST)
 772                         op = REMOVE;
 773                 else if (old_state == IEEE80211_STA_AUTH &&
 774                          new_state == IEEE80211_STA_ASSOC)
 775                         op = HT_RATE_INIT;
 776         } else {
 777                 if (old_state == IEEE80211_STA_AUTH &&
 778                     new_state == IEEE80211_STA_ASSOC)
 779                         op = ADD_RATE_INIT;
 780                 else if (old_state == IEEE80211_STA_ASSOC &&
 781                          new_state == IEEE80211_STA_AUTH)
 782                         op = REMOVE;
 783         }
 784
 785         switch (op) {
 786         case ADD:
 787                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 788                 break;
 789         case REMOVE:
 790                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 791                 break;
 792         case ADD_RATE_INIT:
 793                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 794                 if (ret)
 795                         break;
 796                 /* Initialize rate scaling */
 797                 IWL_DEBUG_INFO(priv,
 798                                "Initializing rate scaling for station %pM\n",
 799                                sta->addr);
 800                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 801                 ret = 0;
 802                 break;
 803         case HT_RATE_INIT:
 804                 /* Initialize rate scaling */
 805                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 806                 if (ret)
 807                         break;
 808                 IWL_DEBUG_INFO(priv,
 809                                "Initializing rate scaling for station %pM\n",
 810                                sta->addr);
 811                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 812                 ret = 0;
 813                 break;
 814         default:
 815                 ret = 0;
 816                 break;
 817         }
 818
 819         /*
 820          * mac80211 might WARN if we fail, but due the way we
 821          * (badly) handle hard rfkill, we might fail here
 822          */
 823         if (iwl_is_rfkill(priv))
 824                 ret = 0;
 825
 826         mutex_unlock(&priv->mutex);
 827         IWL_DEBUG_MAC80211(priv, "leave\n");
 828
 829         return ret;
 830 }
 831
 832 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 833                                 struct ieee80211_channel_switch *ch_switch)
 834 {
 835         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 836         const struct iwl_channel_info *ch_info;
 837         struct ieee80211_conf *conf = &hw->conf;
 838         struct ieee80211_channel *channel = ch_switch->channel;
 839         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 840         /*
 841          * MULTI-FIXME
 842          * When we add support for multiple interfaces, we need to
 843          * revisit this. The channel switch command in the device
 844          * only affects the BSS context, but what does that really
 845          * mean? And what if we get a CSA on the second interface?
 846          * This needs a lot of work.
 847          */
 848         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 849         u16 ch;
 850
 851         IWL_DEBUG_MAC80211(priv, "enter\n");
 852
 853         mutex_lock(&priv->mutex);
 854
 855         if (iwl_is_rfkill(priv))
 856                 goto out;
 857
 858         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 859             test_bit(STATUS_SCANNING, &priv->status) ||
 860             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 861                 goto out;
 862
 863         if (!iwl_is_associated_ctx(ctx))
 864                 goto out;
 865
 866         if (!cfg(priv)->lib->set_channel_switch)
 867                 goto out;
 868
 869         ch = channel->hw_value;
 870         if (le16_to_cpu(ctx->active.channel) == ch)
 871                 goto out;
 872
 873         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 874         if (!is_channel_valid(ch_info)) {
 875                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 876                 goto out;
 877         }
 878
 879         priv->current_ht_config.smps = conf->smps_mode;
 880
 881         /* Configure HT40 channels */
 882         ctx->ht.enabled = conf_is_ht(conf);
 883         if (ctx->ht.enabled)
 884                 iwlagn_config_ht40(conf, ctx);
 885         else
 886                 ctx->ht.is_40mhz = false;
 887
 888         if ((le16_to_cpu(ctx->staging.channel) != ch))
 889                 ctx->staging.flags = 0;
 890
 891         iwl_set_rxon_channel(priv, channel, ctx);
 892         iwl_set_rxon_ht(priv, ht_conf);
 893         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 894
 895         iwl_set_rate(priv);
 896         /*
 897          * at this point, staging_rxon has the
 898          * configuration for channel switch
 899          */
 900         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 901         priv->switch_channel = cpu_to_le16(ch);
 902         if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) {
 903                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 904                 priv->switch_channel = 0;
 905                 ieee80211_chswitch_done(ctx->vif, false);
 906         }
 907
 908 out:
 909         mutex_unlock(&priv->mutex);
 910         IWL_DEBUG_MAC80211(priv, "leave\n");
 911 }
 912
 913 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 914                                     unsigned int changed_flags,
 915                                     unsigned int *total_flags,
 916                                     u64 multicast)
 917 {
 918         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 919         __le32 filter_or = 0, filter_nand = 0;
 920         struct iwl_rxon_context *ctx;
 921
 922 #define CHK(test, flag) do { \
 923         if (*total_flags & (test))              \
 924                 filter_or |= (flag);            \
 925         else                                    \
 926                 filter_nand |= (flag);          \
 927         } while (0)
 928
 929         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 930                         changed_flags, *total_flags);
 931
 932         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 933         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 934         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 935         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 936
 937 #undef CHK
 938
 939         mutex_lock(&priv->mutex);
 940
 941         for_each_context(priv, ctx) {
 942                 ctx->staging.filter_flags &= ~filter_nand;
 943                 ctx->staging.filter_flags |= filter_or;
 944
 945                 /*
 946                  * Not committing directly because hardware can perform a scan,
 947                  * but we'll eventually commit the filter flags change anyway.
 948                  */
 949         }
 950
 951         mutex_unlock(&priv->mutex);
 952
 953         /*
 954          * Receiving all multicast frames is always enabled by the
 955          * default flags setup in iwl_connection_init_rx_config()
 956          * since we currently do not support programming multicast
 957          * filters into the device.
 958          */
 959         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 960                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 961 }
 962
 963 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 964 {
 965         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 966
 967         mutex_lock(&priv->mutex);
 968         IWL_DEBUG_MAC80211(priv, "enter\n");
 969
 970         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 971                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 972                 goto done;
 973         }
 974         if (iwl_is_rfkill(priv)) {
 975                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 976                 goto done;
 977         }
 978
 979         /*
 980          * mac80211 will not push any more frames for transmit
 981          * until the flush is completed
 982          */
 983         if (drop) {
 984                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 985                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 986                         IWL_ERR(priv, "flush request fail\n");
 987                         goto done;
 988                 }
 989         }
 990         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 991         iwl_trans_wait_tx_queue_empty(trans(priv));
 992 done:
 993         mutex_unlock(&priv->mutex);
 994         IWL_DEBUG_MAC80211(priv, "leave\n");
 995 }
 996
 997 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 998                                      struct ieee80211_channel *channel,
 999                                      enum nl80211_channel_type channel_type,
1000                                      int duration)
1001 {
1002         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1003         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1004         int err = 0;
1005
1006         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1007                 return -EOPNOTSUPP;
1008
1009         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1010                 return -EOPNOTSUPP;
1011
1012         IWL_DEBUG_MAC80211(priv, "enter\n");
1013         mutex_lock(&priv->mutex);
1014
1015         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1016                 err = -EBUSY;
1017                 goto out;
1018         }
1019
1020         priv->hw_roc_channel = channel;
1021         priv->hw_roc_chantype = channel_type;
1022         /* convert from ms to TU */
1023         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1024         priv->hw_roc_start_notified = false;
1025         cancel_delayed_work(&priv->hw_roc_disable_work);
1026
1027         if (!ctx->is_active) {
1028                 static const struct iwl_qos_info default_qos_data = {
1029                         .def_qos_parm = {
1030                                 .ac[0] = {
1031                                         .cw_min = cpu_to_le16(3),
1032                                         .cw_max = cpu_to_le16(7),
1033                                         .aifsn = 2,
1034                                         .edca_txop = cpu_to_le16(1504),
1035                                 },
1036                                 .ac[1] = {
1037                                         .cw_min = cpu_to_le16(7),
1038                                         .cw_max = cpu_to_le16(15),
1039                                         .aifsn = 2,
1040                                         .edca_txop = cpu_to_le16(3008),
1041                                 },
1042                                 .ac[2] = {
1043                                         .cw_min = cpu_to_le16(15),
1044                                         .cw_max = cpu_to_le16(1023),
1045                                         .aifsn = 3,
1046                                 },
1047                                 .ac[3] = {
1048                                         .cw_min = cpu_to_le16(15),
1049                                         .cw_max = cpu_to_le16(1023),
1050                                         .aifsn = 7,
1051                                 },
1052                         },
1053                 };
1054
1055                 ctx->is_active = true;
1056                 ctx->qos_data = default_qos_data;
1057                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1058                 memcpy(ctx->staging.node_addr,
1059                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1060                        ETH_ALEN);
1061                 memcpy(ctx->staging.bssid_addr,
1062                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1063                        ETH_ALEN);
1064                 err = iwlagn_commit_rxon(priv, ctx);
1065                 if (err)
1066                         goto out;
1067                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1068                                              RXON_FILTER_PROMISC_MSK |
1069                                              RXON_FILTER_CTL2HOST_MSK;
1070
1071                 err = iwlagn_commit_rxon(priv, ctx);
1072                 if (err) {
1073                         iwlagn_disable_roc(priv);
1074                         goto out;
1075                 }
1076                 priv->hw_roc_setup = true;
1077         }
1078
1079         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1080         if (err)
1081                 iwlagn_disable_roc(priv);
1082
1083  out:
1084         mutex_unlock(&priv->mutex);
1085         IWL_DEBUG_MAC80211(priv, "leave\n");
1086
1087         return err;
1088 }
1089
1090 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1091 {
1092         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1093
1094         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1095                 return -EOPNOTSUPP;
1096
1097         IWL_DEBUG_MAC80211(priv, "enter\n");
1098         mutex_lock(&priv->mutex);
1099         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1100         iwlagn_disable_roc(priv);
1101         mutex_unlock(&priv->mutex);
1102         IWL_DEBUG_MAC80211(priv, "leave\n");
1103
1104         return 0;
1105 }
1106
1107 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1108                            enum ieee80211_rssi_event rssi_event)
1109 {
1110         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1111
1112         IWL_DEBUG_MAC80211(priv, "enter\n");
1113         mutex_lock(&priv->mutex);
1114
1115         if (cfg(priv)->bt_params &&
1116                         cfg(priv)->bt_params->advanced_bt_coexist) {
1117                 if (rssi_event == RSSI_EVENT_LOW)
1118                         priv->bt_enable_pspoll = true;
1119                 else if (rssi_event == RSSI_EVENT_HIGH)
1120                         priv->bt_enable_pspoll = false;
1121
1122                 iwlagn_send_advance_bt_config(priv);
1123         } else {
1124                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1125                                 "ignoring RSSI callback\n");
1126         }
1127
1128         mutex_unlock(&priv->mutex);
1129         IWL_DEBUG_MAC80211(priv, "leave\n");
1130 }
1131
1132 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1133                            struct ieee80211_sta *sta, bool set)
1134 {
1135         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1136
1137         queue_work(priv->workqueue, &priv->beacon_update);
1138
1139         return 0;
1140 }
1141
1142 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1143                     struct ieee80211_vif *vif, u16 queue,
1144                     const struct ieee80211_tx_queue_params *params)
1145 {
1146         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1147         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1148         struct iwl_rxon_context *ctx = vif_priv->ctx;
1149         int q;
1150
1151         if (WARN_ON(!ctx))
1152                 return -EINVAL;
1153
1154         IWL_DEBUG_MAC80211(priv, "enter\n");
1155
1156         if (!iwl_is_ready_rf(priv)) {
1157                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1158                 return -EIO;
1159         }
1160
1161         if (queue >= AC_NUM) {
1162                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1163                 return 0;
1164         }
1165
1166         q = AC_NUM - 1 - queue;
1167
1168         mutex_lock(&priv->mutex);
1169
1170         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1171                 cpu_to_le16(params->cw_min);
1172         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1173                 cpu_to_le16(params->cw_max);
1174         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1175         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1176                         cpu_to_le16((params->txop * 32));
1177
1178         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1179
1180         mutex_unlock(&priv->mutex);
1181
1182         IWL_DEBUG_MAC80211(priv, "leave\n");
1183         return 0;
1184 }
1185
1186 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1187 {
1188         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1189
1190         return priv->ibss_manager == IWL_IBSS_MANAGER;
1191 }
1192
1193 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1194 {
1195         iwl_connection_init_rx_config(priv, ctx);
1196
1197         iwlagn_set_rxon_chain(priv, ctx);
1198
1199         return iwlagn_commit_rxon(priv, ctx);
1200 }
1201
1202 static int iwl_setup_interface(struct iwl_priv *priv,
1203                                struct iwl_rxon_context *ctx)
1204 {
1205         struct ieee80211_vif *vif = ctx->vif;
1206         int err;
1207
1208         lockdep_assert_held(&priv->mutex);
1209
1210         /*
1211          * This variable will be correct only when there's just
1212          * a single context, but all code using it is for hardware
1213          * that supports only one context.
1214          */
1215         priv->iw_mode = vif->type;
1216
1217         ctx->is_active = true;
1218
1219         err = iwl_set_mode(priv, ctx);
1220         if (err) {
1221                 if (!ctx->always_active)
1222                         ctx->is_active = false;
1223                 return err;
1224         }
1225
1226         if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist &&
1227             vif->type == NL80211_IFTYPE_ADHOC) {
1228                 /*
1229                  * pretend to have high BT traffic as long as we
1230                  * are operating in IBSS mode, as this will cause
1231                  * the rate scaling etc. to behave as intended.
1232                  */
1233                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1234         }
1235
1236         return 0;
1237 }
1238
1239 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1240                              struct ieee80211_vif *vif)
1241 {
1242         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1243         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1244         struct iwl_rxon_context *tmp, *ctx = NULL;
1245         int err;
1246         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1247
1248         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1249                            viftype, vif->addr);
1250
1251         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1252
1253         mutex_lock(&priv->mutex);
1254
1255         iwlagn_disable_roc(priv);
1256
1257         if (!iwl_is_ready_rf(priv)) {
1258                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1259                 err = -EINVAL;
1260                 goto out;
1261         }
1262
1263         for_each_context(priv, tmp) {
1264                 u32 possible_modes =
1265                         tmp->interface_modes | tmp->exclusive_interface_modes;
1266
1267                 if (tmp->vif) {
1268                         /* check if this busy context is exclusive */
1269                         if (tmp->exclusive_interface_modes &
1270                                                 BIT(tmp->vif->type)) {
1271                                 err = -EINVAL;
1272                                 goto out;
1273                         }
1274                         continue;
1275                 }
1276
1277                 if (!(possible_modes & BIT(viftype)))
1278                         continue;
1279
1280                 /* have maybe usable context w/o interface */
1281                 ctx = tmp;
1282                 break;
1283         }
1284
1285         if (!ctx) {
1286                 err = -EOPNOTSUPP;
1287                 goto out;
1288         }
1289
1290         vif_priv->ctx = ctx;
1291         ctx->vif = vif;
1292
1293         err = iwl_setup_interface(priv, ctx);
1294         if (!err)
1295                 goto out;
1296
1297         ctx->vif = NULL;
1298         priv->iw_mode = NL80211_IFTYPE_STATION;
1299  out:
1300         mutex_unlock(&priv->mutex);
1301
1302         IWL_DEBUG_MAC80211(priv, "leave\n");
1303         return err;
1304 }
1305
1306 static void iwl_teardown_interface(struct iwl_priv *priv,
1307                                    struct ieee80211_vif *vif,
1308                                    bool mode_change)
1309 {
1310         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1311
1312         lockdep_assert_held(&priv->mutex);
1313
1314         if (priv->scan_vif == vif) {
1315                 iwl_scan_cancel_timeout(priv, 200);
1316                 iwl_force_scan_end(priv);
1317         }
1318
1319         if (!mode_change) {
1320                 iwl_set_mode(priv, ctx);
1321                 if (!ctx->always_active)
1322                         ctx->is_active = false;
1323         }
1324
1325         /*
1326          * When removing the IBSS interface, overwrite the
1327          * BT traffic load with the stored one from the last
1328          * notification, if any. If this is a device that
1329          * doesn't implement this, this has no effect since
1330          * both values are the same and zero.
1331          */
1332         if (vif->type == NL80211_IFTYPE_ADHOC)
1333                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1334 }
1335
1336 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1337                               struct ieee80211_vif *vif)
1338 {
1339         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1340         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1341
1342         IWL_DEBUG_MAC80211(priv, "enter\n");
1343
1344         mutex_lock(&priv->mutex);
1345
1346         if (WARN_ON(ctx->vif != vif)) {
1347                 struct iwl_rxon_context *tmp;
1348                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1349                 for_each_context(priv, tmp)
1350                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1351                                 tmp->ctxid, tmp, tmp->vif);
1352         }
1353         ctx->vif = NULL;
1354
1355         iwl_teardown_interface(priv, vif, false);
1356
1357         mutex_unlock(&priv->mutex);
1358
1359         IWL_DEBUG_MAC80211(priv, "leave\n");
1360
1361 }
1362
1363 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1364                                 struct ieee80211_vif *vif,
1365                                 enum nl80211_iftype newtype, bool newp2p)
1366 {
1367         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1368         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1369         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1370         struct iwl_rxon_context *tmp;
1371         enum nl80211_iftype newviftype = newtype;
1372         u32 interface_modes;
1373         int err;
1374
1375         IWL_DEBUG_MAC80211(priv, "enter\n");
1376
1377         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1378
1379         mutex_lock(&priv->mutex);
1380
1381         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1382                 /*
1383                  * Huh? But wait ... this can maybe happen when
1384                  * we're in the middle of a firmware restart!
1385                  */
1386                 err = -EBUSY;
1387                 goto out;
1388         }
1389
1390         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1391
1392         if (!(interface_modes & BIT(newtype))) {
1393                 err = -EBUSY;
1394                 goto out;
1395         }
1396
1397         /*
1398          * Refuse a change that should be done by moving from the PAN
1399          * context to the BSS context instead, if the BSS context is
1400          * available and can support the new interface type.
1401          */
1402         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1403             (bss_ctx->interface_modes & BIT(newtype) ||
1404              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1405                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1406                 err = -EBUSY;
1407                 goto out;
1408         }
1409
1410         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1411                 for_each_context(priv, tmp) {
1412                         if (ctx == tmp)
1413                                 continue;
1414
1415                         if (!tmp->vif)
1416                                 continue;
1417
1418                         /*
1419                          * The current mode switch would be exclusive, but
1420                          * another context is active ... refuse the switch.
1421                          */
1422                         err = -EBUSY;
1423                         goto out;
1424                 }
1425         }
1426
1427         /* success */
1428         iwl_teardown_interface(priv, vif, true);
1429         vif->type = newviftype;
1430         vif->p2p = newp2p;
1431         err = iwl_setup_interface(priv, ctx);
1432         WARN_ON(err);
1433         /*
1434          * We've switched internally, but submitting to the
1435          * device may have failed for some reason. Mask this
1436          * error, because otherwise mac80211 will not switch
1437          * (and set the interface type back) and we'll be
1438          * out of sync with it.
1439          */
1440         err = 0;
1441
1442  out:
1443         mutex_unlock(&priv->mutex);
1444         IWL_DEBUG_MAC80211(priv, "leave\n");
1445
1446         return err;
1447 }
1448
1449 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1450                     struct ieee80211_vif *vif,
1451                     struct cfg80211_scan_request *req)
1452 {
1453         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1454         int ret;
1455
1456         IWL_DEBUG_MAC80211(priv, "enter\n");
1457
1458         if (req->n_channels == 0)
1459                 return -EINVAL;
1460
1461         mutex_lock(&priv->mutex);
1462
1463         /*
1464          * If an internal scan is in progress, just set
1465          * up the scan_request as per above.
1466          */
1467         if (priv->scan_type != IWL_SCAN_NORMAL) {
1468                 IWL_DEBUG_SCAN(priv,
1469                                "SCAN request during internal scan - defer\n");
1470                 priv->scan_request = req;
1471                 priv->scan_vif = vif;
1472                 ret = 0;
1473         } else {
1474                 priv->scan_request = req;
1475                 priv->scan_vif = vif;
1476                 /*
1477                  * mac80211 will only ask for one band at a time
1478                  * so using channels[0] here is ok
1479                  */
1480                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1481                                         req->channels[0]->band);
1482                 if (ret) {
1483                         priv->scan_request = NULL;
1484                         priv->scan_vif = NULL;
1485                 }
1486         }
1487
1488         IWL_DEBUG_MAC80211(priv, "leave\n");
1489
1490         mutex_unlock(&priv->mutex);
1491
1492         return ret;
1493 }
1494
1495 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1496 {
1497         struct iwl_addsta_cmd cmd = {
1498                 .mode = STA_CONTROL_MODIFY_MSK,
1499                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1500                 .sta.sta_id = sta_id,
1501         };
1502
1503         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1504 }
1505
1506 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1507                            struct ieee80211_vif *vif,
1508                            enum sta_notify_cmd cmd,
1509                            struct ieee80211_sta *sta)
1510 {
1511         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1512         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1513         int sta_id;
1514
1515         IWL_DEBUG_MAC80211(priv, "enter\n");
1516
1517         switch (cmd) {
1518         case STA_NOTIFY_SLEEP:
1519                 WARN_ON(!sta_priv->client);
1520                 sta_priv->asleep = true;
1521                 if (atomic_read(&sta_priv->pending_frames) > 0)
1522                         ieee80211_sta_block_awake(hw, sta, true);
1523                 break;
1524         case STA_NOTIFY_AWAKE:
1525                 WARN_ON(!sta_priv->client);
1526                 if (!sta_priv->asleep)
1527                         break;
1528                 sta_priv->asleep = false;
1529                 sta_id = iwl_sta_id(sta);
1530                 if (sta_id != IWL_INVALID_STATION)
1531                         iwl_sta_modify_ps_wake(priv, sta_id);
1532                 break;
1533         default:
1534                 break;
1535         }
1536         IWL_DEBUG_MAC80211(priv, "leave\n");
1537 }
1538
1539 struct ieee80211_ops iwlagn_hw_ops = {
1540         .tx = iwlagn_mac_tx,
1541         .start = iwlagn_mac_start,
1542         .stop = iwlagn_mac_stop,
1543 #ifdef CONFIG_PM_SLEEP
1544         .suspend = iwlagn_mac_suspend,
1545         .resume = iwlagn_mac_resume,
1546 #endif
1547         .add_interface = iwlagn_mac_add_interface,
1548         .remove_interface = iwlagn_mac_remove_interface,
1549         .change_interface = iwlagn_mac_change_interface,
1550         .config = iwlagn_mac_config,
1551         .configure_filter = iwlagn_configure_filter,
1552         .set_key = iwlagn_mac_set_key,
1553         .update_tkip_key = iwlagn_mac_update_tkip_key,
1554         .set_rekey_data = iwlagn_mac_set_rekey_data,
1555         .conf_tx = iwlagn_mac_conf_tx,
1556         .bss_info_changed = iwlagn_bss_info_changed,
1557         .ampdu_action = iwlagn_mac_ampdu_action,
1558         .hw_scan = iwlagn_mac_hw_scan,
1559         .sta_notify = iwlagn_mac_sta_notify,
1560         .sta_state = iwlagn_mac_sta_state,
1561         .channel_switch = iwlagn_mac_channel_switch,
1562         .flush = iwlagn_mac_flush,
1563         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1564         .remain_on_channel = iwlagn_mac_remain_on_channel,
1565         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1566         .rssi_callback = iwlagn_mac_rssi_callback,
1567         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1568         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1569         .set_tim = iwlagn_mac_set_tim,
1570 };
1571
1572 /* This function both allocates and initializes hw and priv. */
1573 struct ieee80211_hw *iwl_alloc_all(void)
1574 {
1575         struct iwl_priv *priv;
1576         struct iwl_op_mode *op_mode;
1577         /* mac80211 allocates memory for this device instance, including
1578          *   space for this driver's private structure */
1579         struct ieee80211_hw *hw;
1580
1581         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1582                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1583         if (!hw)
1584                 goto out;
1585
1586         op_mode = hw->priv;
1587         priv = IWL_OP_MODE_GET_DVM(op_mode);
1588         priv->hw = hw;
1589
1590 out:
1591         return hw;
1592 }