drivers/net/wireless/iwlwifi/dvm/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/ieee80211_radiotap.h>
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-io.h"
  47 #include "iwl-trans.h"
  48 #include "iwl-op-mode.h"
  49 #include "iwl-modparams.h"
  50
  51 #include "dev.h"
  52 #include "calib.h"
  53 #include "agn.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                     IEEE80211_HW_QUEUE_CONTROL |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_WANT_MONITOR_VIF |
 155                     IEEE80211_HW_SCAN_WHILE_IDLE;
 156
 157         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 158         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 159
 160         /*
 161          * Including the following line will crash some AP's.  This
 162          * workaround removes the stimulus which causes the crash until
 163          * the AP software can be fixed.
 164         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 165          */
 166
 167         if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)
 168                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 169                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 170
 171 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
 172         /* enable 11w if the uCode advertise */
 173         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 174 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
 175                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 176
 177         hw->sta_data_size = sizeof(struct iwl_station_priv);
 178         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 179
 180         for_each_context(priv, ctx) {
 181                 hw->wiphy->interface_modes |= ctx->interface_modes;
 182                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 183         }
 184
 185         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 186
 187         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 188                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 189                 hw->wiphy->n_iface_combinations =
 190                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 191         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 192                 hw->wiphy->iface_combinations =
 193                         iwlagn_iface_combinations_dualmode;
 194                 hw->wiphy->n_iface_combinations =
 195                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 196         }
 197
 198         hw->wiphy->max_remain_on_channel_duration = 500;
 199
 200         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 201                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 202                             WIPHY_FLAG_IBSS_RSN;
 203
 204 #ifdef CONFIG_PM_SLEEP
 205         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 206             priv->trans->ops->wowlan_suspend &&
 207             device_can_wakeup(priv->trans->dev)) {
 208                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 209                                           WIPHY_WOWLAN_DISCONNECT |
 210                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 211                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 212                 if (!iwlwifi_mod_params.sw_crypto)
 213                         hw->wiphy->wowlan.flags |=
 214                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 215                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 216
 217                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 218                 hw->wiphy->wowlan.pattern_min_len =
 219                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 220                 hw->wiphy->wowlan.pattern_max_len =
 221                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 222         }
 223 #endif
 224
 225         if (iwlwifi_mod_params.power_save)
 226                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 227         else
 228                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 229
 230         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 231         /* we create the 802.11 header and a max-length SSID element */
 232         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 233
 234         /*
 235          * We don't use all queues: 4 and 9 are unused and any
 236          * aggregation queue gets mapped down to the AC queue.
 237          */
 238         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 239
 240         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 241
 242         if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 243                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 244                         &priv->eeprom_data->bands[IEEE80211_BAND_2GHZ];
 245         if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 246                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 247                         &priv->eeprom_data->bands[IEEE80211_BAND_5GHZ];
 248
 249         hw->wiphy->hw_version = priv->trans->hw_id;
 250
 251         iwl_leds_init(priv);
 252
 253         ret = ieee80211_register_hw(priv->hw);
 254         if (ret) {
 255                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 256                 iwl_leds_exit(priv);
 257                 return ret;
 258         }
 259         priv->mac80211_registered = 1;
 260
 261         return 0;
 262 }
 263
 264 void iwlagn_mac_unregister(struct iwl_priv *priv)
 265 {
 266         if (!priv->mac80211_registered)
 267                 return;
 268         iwl_leds_exit(priv);
 269         ieee80211_unregister_hw(priv->hw);
 270         priv->mac80211_registered = 0;
 271 }
 272
 273 static int __iwl_up(struct iwl_priv *priv)
 274 {
 275         struct iwl_rxon_context *ctx;
 276         int ret;
 277
 278         lockdep_assert_held(&priv->mutex);
 279
 280         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 281                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 282                 return -EIO;
 283         }
 284
 285         for_each_context(priv, ctx) {
 286                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 287                 if (ret) {
 288                         iwl_dealloc_bcast_stations(priv);
 289                         return ret;
 290                 }
 291         }
 292
 293         ret = iwl_run_init_ucode(priv);
 294         if (ret) {
 295                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 296                 goto error;
 297         }
 298
 299         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 300         if (ret) {
 301                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 302                 goto error;
 303         }
 304
 305         ret = iwl_alive_start(priv);
 306         if (ret)
 307                 goto error;
 308         return 0;
 309
 310  error:
 311         set_bit(STATUS_EXIT_PENDING, &priv->status);
 312         iwl_down(priv);
 313         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 314
 315         IWL_ERR(priv, "Unable to initialize device.\n");
 316         return ret;
 317 }
 318
 319 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 320 {
 321         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 322         int ret;
 323
 324         IWL_DEBUG_MAC80211(priv, "enter\n");
 325
 326         /* we should be verifying the device is ready to be opened */
 327         mutex_lock(&priv->mutex);
 328         ret = __iwl_up(priv);
 329         mutex_unlock(&priv->mutex);
 330         if (ret)
 331                 return ret;
 332
 333         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 334
 335         /* Now we should be done, and the READY bit should be set. */
 336         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 337                 ret = -EIO;
 338
 339         iwlagn_led_enable(priv);
 340
 341         priv->is_open = 1;
 342         IWL_DEBUG_MAC80211(priv, "leave\n");
 343         return 0;
 344 }
 345
 346 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 347 {
 348         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 349
 350         IWL_DEBUG_MAC80211(priv, "enter\n");
 351
 352         if (!priv->is_open)
 353                 return;
 354
 355         priv->is_open = 0;
 356
 357         mutex_lock(&priv->mutex);
 358         iwl_down(priv);
 359         mutex_unlock(&priv->mutex);
 360
 361         iwl_cancel_deferred_work(priv);
 362
 363         flush_workqueue(priv->workqueue);
 364
 365         /* User space software may expect getting rfkill changes
 366          * even if interface is down, trans->down will leave the RF
 367          * kill interrupt enabled
 368          */
 369         iwl_trans_stop_hw(priv->trans, false);
 370
 371         IWL_DEBUG_MAC80211(priv, "leave\n");
 372 }
 373
 374 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 375                                       struct ieee80211_vif *vif,
 376                                       struct cfg80211_gtk_rekey_data *data)
 377 {
 378         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 379
 380         if (iwlwifi_mod_params.sw_crypto)
 381                 return;
 382
 383         IWL_DEBUG_MAC80211(priv, "enter\n");
 384         mutex_lock(&priv->mutex);
 385
 386         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 387                 goto out;
 388
 389         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 390         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 391         priv->replay_ctr =
 392                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 393         priv->have_rekey_data = true;
 394
 395  out:
 396         mutex_unlock(&priv->mutex);
 397         IWL_DEBUG_MAC80211(priv, "leave\n");
 398 }
 399
 400 #ifdef CONFIG_PM_SLEEP
 401
 402 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 403                               struct cfg80211_wowlan *wowlan)
 404 {
 405         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 406         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 407         int ret;
 408
 409         if (WARN_ON(!wowlan))
 410                 return -EINVAL;
 411
 412         IWL_DEBUG_MAC80211(priv, "enter\n");
 413         mutex_lock(&priv->mutex);
 414
 415         /* Don't attempt WoWLAN when not associated, tear down instead. */
 416         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 417             !iwl_is_associated_ctx(ctx)) {
 418                 ret = 1;
 419                 goto out;
 420         }
 421
 422         ret = iwlagn_suspend(priv, wowlan);
 423         if (ret)
 424                 goto error;
 425
 426         iwl_trans_wowlan_suspend(priv->trans);
 427
 428         goto out;
 429
 430  error:
 431         priv->wowlan = false;
 432         iwlagn_prepare_restart(priv);
 433         ieee80211_restart_hw(priv->hw);
 434  out:
 435         mutex_unlock(&priv->mutex);
 436         IWL_DEBUG_MAC80211(priv, "leave\n");
 437
 438         return ret;
 439 }
 440
 441 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 442 {
 443         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 444         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 445         struct ieee80211_vif *vif;
 446         unsigned long flags;
 447         u32 base, status = 0xffffffff;
 448         int ret = -EIO;
 449
 450         IWL_DEBUG_MAC80211(priv, "enter\n");
 451         mutex_lock(&priv->mutex);
 452
 453         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 454                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 455
 456         base = priv->device_pointers.error_event_table;
 457         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 458                 spin_lock_irqsave(&priv->trans->reg_lock, flags);
 459                 ret = iwl_grab_nic_access_silent(priv->trans);
 460                 if (likely(ret == 0)) {
 461                         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
 462                         status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 463                         iwl_release_nic_access(priv->trans);
 464                 }
 465                 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
 466
 467 #ifdef CONFIG_IWLWIFI_DEBUGFS
 468                 if (ret == 0) {
 469                         const struct fw_img *img;
 470
 471                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 472                         if (!priv->wowlan_sram) {
 473                                 priv->wowlan_sram =
 474                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 475                                                 GFP_KERNEL);
 476                         }
 477
 478                         if (priv->wowlan_sram)
 479                                 _iwl_read_targ_mem_dwords(
 480                                       priv->trans, 0x800000,
 481                                       priv->wowlan_sram,
 482                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 483                 }
 484 #endif
 485         }
 486
 487         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 488         vif = ctx->vif;
 489
 490         priv->wowlan = false;
 491
 492         iwlagn_prepare_restart(priv);
 493
 494         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 495         iwl_connection_init_rx_config(priv, ctx);
 496         iwlagn_set_rxon_chain(priv, ctx);
 497
 498         mutex_unlock(&priv->mutex);
 499         IWL_DEBUG_MAC80211(priv, "leave\n");
 500
 501         ieee80211_resume_disconnect(vif);
 502
 503         return 1;
 504 }
 505
 506 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 507 {
 508         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 509
 510         device_set_wakeup_enable(priv->trans->dev, enabled);
 511 }
 512 #endif
 513
 514 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 515                           struct ieee80211_tx_control *control,
 516                           struct sk_buff *skb)
 517 {
 518         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 519
 520         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 521                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 522
 523         if (iwlagn_tx_skb(priv, control->sta, skb))
 524                 ieee80211_free_txskb(hw, skb);
 525 }
 526
 527 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 528                                        struct ieee80211_vif *vif,
 529                                        struct ieee80211_key_conf *keyconf,
 530                                        struct ieee80211_sta *sta,
 531                                        u32 iv32, u16 *phase1key)
 532 {
 533         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 534
 535         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 536 }
 537
 538 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 539                               struct ieee80211_vif *vif,
 540                               struct ieee80211_sta *sta,
 541                               struct ieee80211_key_conf *key)
 542 {
 543         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 544         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 545         struct iwl_rxon_context *ctx = vif_priv->ctx;
 546         int ret;
 547         bool is_default_wep_key = false;
 548
 549         IWL_DEBUG_MAC80211(priv, "enter\n");
 550
 551         if (iwlwifi_mod_params.sw_crypto) {
 552                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 553                 return -EOPNOTSUPP;
 554         }
 555
 556         switch (key->cipher) {
 557         case WLAN_CIPHER_SUITE_TKIP:
 558                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 559                 /* fall through */
 560         case WLAN_CIPHER_SUITE_CCMP:
 561                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 562                 break;
 563         default:
 564                 break;
 565         }
 566
 567         /*
 568          * We could program these keys into the hardware as well, but we
 569          * don't expect much multicast traffic in IBSS and having keys
 570          * for more stations is probably more useful.
 571          *
 572          * Mark key TX-only and return 0.
 573          */
 574         if (vif->type == NL80211_IFTYPE_ADHOC &&
 575             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 576                 key->hw_key_idx = WEP_INVALID_OFFSET;
 577                 return 0;
 578         }
 579
 580         /* If they key was TX-only, accept deletion */
 581         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 582                 return 0;
 583
 584         mutex_lock(&priv->mutex);
 585         iwl_scan_cancel_timeout(priv, 100);
 586
 587         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 588
 589         /*
 590          * If we are getting WEP group key and we didn't receive any key mapping
 591          * so far, we are in legacy wep mode (group key only), otherwise we are
 592          * in 1X mode.
 593          * In legacy wep mode, we use another host command to the uCode.
 594          */
 595         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 596              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 597                 if (cmd == SET_KEY)
 598                         is_default_wep_key = !ctx->key_mapping_keys;
 599                 else
 600                         is_default_wep_key =
 601                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 602         }
 603
 604
 605         switch (cmd) {
 606         case SET_KEY:
 607                 if (is_default_wep_key) {
 608                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 609                         break;
 610                 }
 611                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 612                 if (ret) {
 613                         /*
 614                          * can't add key for RX, but we don't need it
 615                          * in the device for TX so still return 0
 616                          */
 617                         ret = 0;
 618                         key->hw_key_idx = WEP_INVALID_OFFSET;
 619                 }
 620
 621                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 622                 break;
 623         case DISABLE_KEY:
 624                 if (is_default_wep_key)
 625                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 626                 else
 627                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 628
 629                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 630                 break;
 631         default:
 632                 ret = -EINVAL;
 633         }
 634
 635         mutex_unlock(&priv->mutex);
 636         IWL_DEBUG_MAC80211(priv, "leave\n");
 637
 638         return ret;
 639 }
 640
 641 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 642                                    struct ieee80211_vif *vif,
 643                                    enum ieee80211_ampdu_mlme_action action,
 644                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 645                                    u8 buf_size)
 646 {
 647         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 648         int ret = -EINVAL;
 649         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 650
 651         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 652                      sta->addr, tid);
 653
 654         if (!(priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE))
 655                 return -EACCES;
 656
 657         IWL_DEBUG_MAC80211(priv, "enter\n");
 658         mutex_lock(&priv->mutex);
 659
 660         switch (action) {
 661         case IEEE80211_AMPDU_RX_START:
 662                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 663                         break;
 664                 IWL_DEBUG_HT(priv, "start Rx\n");
 665                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 666                 break;
 667         case IEEE80211_AMPDU_RX_STOP:
 668                 IWL_DEBUG_HT(priv, "stop Rx\n");
 669                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 670                 break;
 671         case IEEE80211_AMPDU_TX_START:
 672                 if (!priv->trans->ops->txq_enable)
 673                         break;
 674                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 675                         break;
 676                 IWL_DEBUG_HT(priv, "start Tx\n");
 677                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 678                 break;
 679         case IEEE80211_AMPDU_TX_STOP:
 680                 IWL_DEBUG_HT(priv, "stop Tx\n");
 681                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 682                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 683                         priv->agg_tids_count--;
 684                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 685                                      priv->agg_tids_count);
 686                 }
 687                 if (!priv->agg_tids_count &&
 688                     priv->hw_params.use_rts_for_aggregation) {
 689                         /*
 690                          * switch off RTS/CTS if it was previously enabled
 691                          */
 692                         sta_priv->lq_sta.lq.general_params.flags &=
 693                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 694                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 695                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 696                 }
 697                 break;
 698         case IEEE80211_AMPDU_TX_OPERATIONAL:
 699                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 700                 break;
 701         }
 702         mutex_unlock(&priv->mutex);
 703         IWL_DEBUG_MAC80211(priv, "leave\n");
 704         return ret;
 705 }
 706
 707 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 708                               struct ieee80211_vif *vif,
 709                               struct ieee80211_sta *sta)
 710 {
 711         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 712         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 713         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 714         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 715         int ret;
 716         u8 sta_id;
 717
 718         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 719                         sta->addr);
 720         sta_priv->sta_id = IWL_INVALID_STATION;
 721
 722         atomic_set(&sta_priv->pending_frames, 0);
 723         if (vif->type == NL80211_IFTYPE_AP)
 724                 sta_priv->client = true;
 725
 726         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 727                                      is_ap, sta, &sta_id);
 728         if (ret) {
 729                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 730                         sta->addr, ret);
 731                 /* Should we return success if return code is EEXIST ? */
 732                 return ret;
 733         }
 734
 735         sta_priv->sta_id = sta_id;
 736
 737         return 0;
 738 }
 739
 740 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 741                                  struct ieee80211_vif *vif,
 742                                  struct ieee80211_sta *sta)
 743 {
 744         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 745         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 746         int ret;
 747
 748         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 749
 750         if (vif->type == NL80211_IFTYPE_STATION) {
 751                 /*
 752                  * Station will be removed from device when the RXON
 753                  * is set to unassociated -- just deactivate it here
 754                  * to avoid re-programming it.
 755                  */
 756                 ret = 0;
 757                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 758         } else {
 759                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 760                 if (ret)
 761                         IWL_DEBUG_QUIET_RFKILL(priv,
 762                                 "Error removing station %pM\n", sta->addr);
 763         }
 764         return ret;
 765 }
 766
 767 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 768                                 struct ieee80211_vif *vif,
 769                                 struct ieee80211_sta *sta,
 770                                 enum ieee80211_sta_state old_state,
 771                                 enum ieee80211_sta_state new_state)
 772 {
 773         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 774         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 775         enum {
 776                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 777         } op = NONE;
 778         int ret;
 779
 780         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 781                            sta->addr, old_state, new_state);
 782
 783         mutex_lock(&priv->mutex);
 784         if (vif->type == NL80211_IFTYPE_STATION) {
 785                 if (old_state == IEEE80211_STA_NOTEXIST &&
 786                     new_state == IEEE80211_STA_NONE)
 787                         op = ADD;
 788                 else if (old_state == IEEE80211_STA_NONE &&
 789                          new_state == IEEE80211_STA_NOTEXIST)
 790                         op = REMOVE;
 791                 else if (old_state == IEEE80211_STA_AUTH &&
 792                          new_state == IEEE80211_STA_ASSOC)
 793                         op = HT_RATE_INIT;
 794         } else {
 795                 if (old_state == IEEE80211_STA_AUTH &&
 796                     new_state == IEEE80211_STA_ASSOC)
 797                         op = ADD_RATE_INIT;
 798                 else if (old_state == IEEE80211_STA_ASSOC &&
 799                          new_state == IEEE80211_STA_AUTH)
 800                         op = REMOVE;
 801         }
 802
 803         switch (op) {
 804         case ADD:
 805                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 806                 if (ret)
 807                         break;
 808                 /*
 809                  * Clear the in-progress flag, the AP station entry was added
 810                  * but we'll initialize LQ only when we've associated (which
 811                  * would also clear the in-progress flag). This is necessary
 812                  * in case we never initialize LQ because association fails.
 813                  */
 814                 spin_lock_bh(&priv->sta_lock);
 815                 priv->stations[iwl_sta_id(sta)].used &=
 816                         ~IWL_STA_UCODE_INPROGRESS;
 817                 spin_unlock_bh(&priv->sta_lock);
 818                 break;
 819         case REMOVE:
 820                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 821                 break;
 822         case ADD_RATE_INIT:
 823                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 824                 if (ret)
 825                         break;
 826                 /* Initialize rate scaling */
 827                 IWL_DEBUG_INFO(priv,
 828                                "Initializing rate scaling for station %pM\n",
 829                                sta->addr);
 830                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 831                 ret = 0;
 832                 break;
 833         case HT_RATE_INIT:
 834                 /* Initialize rate scaling */
 835                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 836                 if (ret)
 837                         break;
 838                 IWL_DEBUG_INFO(priv,
 839                                "Initializing rate scaling for station %pM\n",
 840                                sta->addr);
 841                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 842                 ret = 0;
 843                 break;
 844         default:
 845                 ret = 0;
 846                 break;
 847         }
 848
 849         /*
 850          * mac80211 might WARN if we fail, but due the way we
 851          * (badly) handle hard rfkill, we might fail here
 852          */
 853         if (iwl_is_rfkill(priv))
 854                 ret = 0;
 855
 856         mutex_unlock(&priv->mutex);
 857         IWL_DEBUG_MAC80211(priv, "leave\n");
 858
 859         return ret;
 860 }
 861
 862 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 863                                       struct ieee80211_channel_switch *ch_switch)
 864 {
 865         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 866         struct ieee80211_conf *conf = &hw->conf;
 867         struct ieee80211_channel *channel = ch_switch->channel;
 868         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 869         /*
 870          * MULTI-FIXME
 871          * When we add support for multiple interfaces, we need to
 872          * revisit this. The channel switch command in the device
 873          * only affects the BSS context, but what does that really
 874          * mean? And what if we get a CSA on the second interface?
 875          * This needs a lot of work.
 876          */
 877         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 878         u16 ch;
 879
 880         IWL_DEBUG_MAC80211(priv, "enter\n");
 881
 882         mutex_lock(&priv->mutex);
 883
 884         if (iwl_is_rfkill(priv))
 885                 goto out;
 886
 887         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 888             test_bit(STATUS_SCANNING, &priv->status) ||
 889             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 890                 goto out;
 891
 892         if (!iwl_is_associated_ctx(ctx))
 893                 goto out;
 894
 895         if (!priv->lib->set_channel_switch)
 896                 goto out;
 897
 898         ch = channel->hw_value;
 899         if (le16_to_cpu(ctx->active.channel) == ch)
 900                 goto out;
 901
 902         priv->current_ht_config.smps = conf->smps_mode;
 903
 904         /* Configure HT40 channels */
 905         ctx->ht.enabled = conf_is_ht(conf);
 906         if (ctx->ht.enabled)
 907                 iwlagn_config_ht40(conf, ctx);
 908         else
 909                 ctx->ht.is_40mhz = false;
 910
 911         if ((le16_to_cpu(ctx->staging.channel) != ch))
 912                 ctx->staging.flags = 0;
 913
 914         iwl_set_rxon_channel(priv, channel, ctx);
 915         iwl_set_rxon_ht(priv, ht_conf);
 916         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 917
 918         /*
 919          * at this point, staging_rxon has the
 920          * configuration for channel switch
 921          */
 922         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 923         priv->switch_channel = cpu_to_le16(ch);
 924         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 925                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 926                 priv->switch_channel = 0;
 927                 ieee80211_chswitch_done(ctx->vif, false);
 928         }
 929
 930 out:
 931         mutex_unlock(&priv->mutex);
 932         IWL_DEBUG_MAC80211(priv, "leave\n");
 933 }
 934
 935 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 936 {
 937         /*
 938          * MULTI-FIXME
 939          * See iwlagn_mac_channel_switch.
 940          */
 941         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 942
 943         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 944                 return;
 945
 946         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 947                 ieee80211_chswitch_done(ctx->vif, is_success);
 948 }
 949
 950 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 951                                     unsigned int changed_flags,
 952                                     unsigned int *total_flags,
 953                                     u64 multicast)
 954 {
 955         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 956         __le32 filter_or = 0, filter_nand = 0;
 957         struct iwl_rxon_context *ctx;
 958
 959 #define CHK(test, flag) do { \
 960         if (*total_flags & (test))              \
 961                 filter_or |= (flag);            \
 962         else                                    \
 963                 filter_nand |= (flag);          \
 964         } while (0)
 965
 966         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 967                         changed_flags, *total_flags);
 968
 969         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 970         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 971         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 972         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 973
 974 #undef CHK
 975
 976         mutex_lock(&priv->mutex);
 977
 978         for_each_context(priv, ctx) {
 979                 ctx->staging.filter_flags &= ~filter_nand;
 980                 ctx->staging.filter_flags |= filter_or;
 981
 982                 /*
 983                  * Not committing directly because hardware can perform a scan,
 984                  * but we'll eventually commit the filter flags change anyway.
 985                  */
 986         }
 987
 988         mutex_unlock(&priv->mutex);
 989
 990         /*
 991          * Receiving all multicast frames is always enabled by the
 992          * default flags setup in iwl_connection_init_rx_config()
 993          * since we currently do not support programming multicast
 994          * filters into the device.
 995          */
 996         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 997                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 998 }
 999
1000 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1001 {
1002         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1003
1004         mutex_lock(&priv->mutex);
1005         IWL_DEBUG_MAC80211(priv, "enter\n");
1006
1007         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1008                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1009                 goto done;
1010         }
1011         if (iwl_is_rfkill(priv)) {
1012                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1013                 goto done;
1014         }
1015
1016         /*
1017          * mac80211 will not push any more frames for transmit
1018          * until the flush is completed
1019          */
1020         if (drop) {
1021                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1022                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1023                         IWL_ERR(priv, "flush request fail\n");
1024                         goto done;
1025                 }
1026         }
1027         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1028         iwl_trans_wait_tx_queue_empty(priv->trans);
1029 done:
1030         mutex_unlock(&priv->mutex);
1031         IWL_DEBUG_MAC80211(priv, "leave\n");
1032 }
1033
1034 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1035                                      struct ieee80211_channel *channel,
1036                                      enum nl80211_channel_type channel_type,
1037                                      int duration)
1038 {
1039         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1040         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1041         int err = 0;
1042
1043         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1044                 return -EOPNOTSUPP;
1045
1046         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1047                 return -EOPNOTSUPP;
1048
1049         IWL_DEBUG_MAC80211(priv, "enter\n");
1050         mutex_lock(&priv->mutex);
1051
1052         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1053                 /* mac80211 should not scan while ROC or ROC while scanning */
1054                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1055                         err = -EBUSY;
1056                         goto out;
1057                 }
1058
1059                 iwl_scan_cancel_timeout(priv, 100);
1060
1061                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1062                         err = -EBUSY;
1063                         goto out;
1064                 }
1065         }
1066
1067         priv->hw_roc_channel = channel;
1068         priv->hw_roc_chantype = channel_type;
1069         /* convert from ms to TU */
1070         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1071         priv->hw_roc_start_notified = false;
1072         cancel_delayed_work(&priv->hw_roc_disable_work);
1073
1074         if (!ctx->is_active) {
1075                 static const struct iwl_qos_info default_qos_data = {
1076                         .def_qos_parm = {
1077                                 .ac[0] = {
1078                                         .cw_min = cpu_to_le16(3),
1079                                         .cw_max = cpu_to_le16(7),
1080                                         .aifsn = 2,
1081                                         .edca_txop = cpu_to_le16(1504),
1082                                 },
1083                                 .ac[1] = {
1084                                         .cw_min = cpu_to_le16(7),
1085                                         .cw_max = cpu_to_le16(15),
1086                                         .aifsn = 2,
1087                                         .edca_txop = cpu_to_le16(3008),
1088                                 },
1089                                 .ac[2] = {
1090                                         .cw_min = cpu_to_le16(15),
1091                                         .cw_max = cpu_to_le16(1023),
1092                                         .aifsn = 3,
1093                                 },
1094                                 .ac[3] = {
1095                                         .cw_min = cpu_to_le16(15),
1096                                         .cw_max = cpu_to_le16(1023),
1097                                         .aifsn = 7,
1098                                 },
1099                         },
1100                 };
1101
1102                 ctx->is_active = true;
1103                 ctx->qos_data = default_qos_data;
1104                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1105                 memcpy(ctx->staging.node_addr,
1106                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1107                        ETH_ALEN);
1108                 memcpy(ctx->staging.bssid_addr,
1109                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1110                        ETH_ALEN);
1111                 err = iwlagn_commit_rxon(priv, ctx);
1112                 if (err)
1113                         goto out;
1114                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1115                                              RXON_FILTER_PROMISC_MSK |
1116                                              RXON_FILTER_CTL2HOST_MSK;
1117
1118                 err = iwlagn_commit_rxon(priv, ctx);
1119                 if (err) {
1120                         iwlagn_disable_roc(priv);
1121                         goto out;
1122                 }
1123                 priv->hw_roc_setup = true;
1124         }
1125
1126         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1127         if (err)
1128                 iwlagn_disable_roc(priv);
1129
1130  out:
1131         mutex_unlock(&priv->mutex);
1132         IWL_DEBUG_MAC80211(priv, "leave\n");
1133
1134         return err;
1135 }
1136
1137 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1138 {
1139         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1140
1141         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1142                 return -EOPNOTSUPP;
1143
1144         IWL_DEBUG_MAC80211(priv, "enter\n");
1145         mutex_lock(&priv->mutex);
1146         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1147         iwlagn_disable_roc(priv);
1148         mutex_unlock(&priv->mutex);
1149         IWL_DEBUG_MAC80211(priv, "leave\n");
1150
1151         return 0;
1152 }
1153
1154 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1155                                      enum ieee80211_rssi_event rssi_event)
1156 {
1157         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1158
1159         IWL_DEBUG_MAC80211(priv, "enter\n");
1160         mutex_lock(&priv->mutex);
1161
1162         if (priv->cfg->bt_params &&
1163                         priv->cfg->bt_params->advanced_bt_coexist) {
1164                 if (rssi_event == RSSI_EVENT_LOW)
1165                         priv->bt_enable_pspoll = true;
1166                 else if (rssi_event == RSSI_EVENT_HIGH)
1167                         priv->bt_enable_pspoll = false;
1168
1169                 iwlagn_send_advance_bt_config(priv);
1170         } else {
1171                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1172                                 "ignoring RSSI callback\n");
1173         }
1174
1175         mutex_unlock(&priv->mutex);
1176         IWL_DEBUG_MAC80211(priv, "leave\n");
1177 }
1178
1179 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1180                               struct ieee80211_sta *sta, bool set)
1181 {
1182         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1183
1184         queue_work(priv->workqueue, &priv->beacon_update);
1185
1186         return 0;
1187 }
1188
1189 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1190                               struct ieee80211_vif *vif, u16 queue,
1191                               const struct ieee80211_tx_queue_params *params)
1192 {
1193         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1194         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1195         struct iwl_rxon_context *ctx = vif_priv->ctx;
1196         int q;
1197
1198         if (WARN_ON(!ctx))
1199                 return -EINVAL;
1200
1201         IWL_DEBUG_MAC80211(priv, "enter\n");
1202
1203         if (!iwl_is_ready_rf(priv)) {
1204                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1205                 return -EIO;
1206         }
1207
1208         if (queue >= AC_NUM) {
1209                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1210                 return 0;
1211         }
1212
1213         q = AC_NUM - 1 - queue;
1214
1215         mutex_lock(&priv->mutex);
1216
1217         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1218                 cpu_to_le16(params->cw_min);
1219         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1220                 cpu_to_le16(params->cw_max);
1221         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1222         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1223                         cpu_to_le16((params->txop * 32));
1224
1225         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1226
1227         mutex_unlock(&priv->mutex);
1228
1229         IWL_DEBUG_MAC80211(priv, "leave\n");
1230         return 0;
1231 }
1232
1233 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1234 {
1235         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1236
1237         return priv->ibss_manager == IWL_IBSS_MANAGER;
1238 }
1239
1240 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1241 {
1242         iwl_connection_init_rx_config(priv, ctx);
1243
1244         iwlagn_set_rxon_chain(priv, ctx);
1245
1246         return iwlagn_commit_rxon(priv, ctx);
1247 }
1248
1249 static int iwl_setup_interface(struct iwl_priv *priv,
1250                                struct iwl_rxon_context *ctx)
1251 {
1252         struct ieee80211_vif *vif = ctx->vif;
1253         int err, ac;
1254
1255         lockdep_assert_held(&priv->mutex);
1256
1257         /*
1258          * This variable will be correct only when there's just
1259          * a single context, but all code using it is for hardware
1260          * that supports only one context.
1261          */
1262         priv->iw_mode = vif->type;
1263
1264         ctx->is_active = true;
1265
1266         err = iwl_set_mode(priv, ctx);
1267         if (err) {
1268                 if (!ctx->always_active)
1269                         ctx->is_active = false;
1270                 return err;
1271         }
1272
1273         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1274             vif->type == NL80211_IFTYPE_ADHOC) {
1275                 /*
1276                  * pretend to have high BT traffic as long as we
1277                  * are operating in IBSS mode, as this will cause
1278                  * the rate scaling etc. to behave as intended.
1279                  */
1280                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1281         }
1282
1283         /* set up queue mappings */
1284         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1285                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1286
1287         if (vif->type == NL80211_IFTYPE_AP)
1288                 vif->cab_queue = ctx->mcast_queue;
1289         else
1290                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1291
1292         return 0;
1293 }
1294
1295 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1296                                     struct ieee80211_vif *vif)
1297 {
1298         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1299         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1300         struct iwl_rxon_context *tmp, *ctx = NULL;
1301         int err;
1302         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1303         bool reset = false;
1304
1305         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1306                            viftype, vif->addr);
1307
1308         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1309
1310         mutex_lock(&priv->mutex);
1311
1312         iwlagn_disable_roc(priv);
1313
1314         if (!iwl_is_ready_rf(priv)) {
1315                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1316                 err = -EINVAL;
1317                 goto out;
1318         }
1319
1320         for_each_context(priv, tmp) {
1321                 u32 possible_modes =
1322                         tmp->interface_modes | tmp->exclusive_interface_modes;
1323
1324                 if (tmp->vif) {
1325                         /* On reset we need to add the same interface again */
1326                         if (tmp->vif == vif) {
1327                                 reset = true;
1328                                 ctx = tmp;
1329                                 break;
1330                         }
1331
1332                         /* check if this busy context is exclusive */
1333                         if (tmp->exclusive_interface_modes &
1334                                                 BIT(tmp->vif->type)) {
1335                                 err = -EINVAL;
1336                                 goto out;
1337                         }
1338                         continue;
1339                 }
1340
1341                 if (!(possible_modes & BIT(viftype)))
1342                         continue;
1343
1344                 /* have maybe usable context w/o interface */
1345                 ctx = tmp;
1346                 break;
1347         }
1348
1349         if (!ctx) {
1350                 err = -EOPNOTSUPP;
1351                 goto out;
1352         }
1353
1354         vif_priv->ctx = ctx;
1355         ctx->vif = vif;
1356
1357         /*
1358          * In SNIFFER device type, the firmware reports the FCS to
1359          * the host, rather than snipping it off. Unfortunately,
1360          * mac80211 doesn't (yet) provide a per-packet flag for
1361          * this, so that we have to set the hardware flag based
1362          * on the interfaces added. As the monitor interface can
1363          * only be present by itself, and will be removed before
1364          * other interfaces are added, this is safe.
1365          */
1366         if (vif->type == NL80211_IFTYPE_MONITOR)
1367                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1368         else
1369                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1370
1371         err = iwl_setup_interface(priv, ctx);
1372         if (!err || reset)
1373                 goto out;
1374
1375         ctx->vif = NULL;
1376         priv->iw_mode = NL80211_IFTYPE_STATION;
1377  out:
1378         mutex_unlock(&priv->mutex);
1379
1380         IWL_DEBUG_MAC80211(priv, "leave\n");
1381         return err;
1382 }
1383
1384 static void iwl_teardown_interface(struct iwl_priv *priv,
1385                                    struct ieee80211_vif *vif,
1386                                    bool mode_change)
1387 {
1388         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1389
1390         lockdep_assert_held(&priv->mutex);
1391
1392         if (priv->scan_vif == vif) {
1393                 iwl_scan_cancel_timeout(priv, 200);
1394                 iwl_force_scan_end(priv);
1395         }
1396
1397         if (!mode_change) {
1398                 iwl_set_mode(priv, ctx);
1399                 if (!ctx->always_active)
1400                         ctx->is_active = false;
1401         }
1402
1403         /*
1404          * When removing the IBSS interface, overwrite the
1405          * BT traffic load with the stored one from the last
1406          * notification, if any. If this is a device that
1407          * doesn't implement this, this has no effect since
1408          * both values are the same and zero.
1409          */
1410         if (vif->type == NL80211_IFTYPE_ADHOC)
1411                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1412 }
1413
1414 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1415                               struct ieee80211_vif *vif)
1416 {
1417         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1418         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1419
1420         IWL_DEBUG_MAC80211(priv, "enter\n");
1421
1422         mutex_lock(&priv->mutex);
1423
1424         if (WARN_ON(ctx->vif != vif)) {
1425                 struct iwl_rxon_context *tmp;
1426                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1427                 for_each_context(priv, tmp)
1428                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1429                                 tmp->ctxid, tmp, tmp->vif);
1430         }
1431         ctx->vif = NULL;
1432
1433         iwl_teardown_interface(priv, vif, false);
1434
1435         mutex_unlock(&priv->mutex);
1436
1437         IWL_DEBUG_MAC80211(priv, "leave\n");
1438
1439 }
1440
1441 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1442                                        struct ieee80211_vif *vif,
1443                                        enum nl80211_iftype newtype, bool newp2p)
1444 {
1445         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1446         struct iwl_rxon_context *ctx, *tmp;
1447         enum nl80211_iftype newviftype = newtype;
1448         u32 interface_modes;
1449         int err;
1450
1451         IWL_DEBUG_MAC80211(priv, "enter\n");
1452
1453         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1454
1455         mutex_lock(&priv->mutex);
1456
1457         ctx = iwl_rxon_ctx_from_vif(vif);
1458
1459         /*
1460          * To simplify this code, only support changes on the
1461          * BSS context. The PAN context is usually reassigned
1462          * by creating/removing P2P interfaces anyway.
1463          */
1464         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1465                 err = -EBUSY;
1466                 goto out;
1467         }
1468
1469         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1470                 /*
1471                  * Huh? But wait ... this can maybe happen when
1472                  * we're in the middle of a firmware restart!
1473                  */
1474                 err = -EBUSY;
1475                 goto out;
1476         }
1477
1478         /* Check if the switch is supported in the same context */
1479         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1480         if (!(interface_modes & BIT(newtype))) {
1481                 err = -EBUSY;
1482                 goto out;
1483         }
1484
1485         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1486                 for_each_context(priv, tmp) {
1487                         if (ctx == tmp)
1488                                 continue;
1489
1490                         if (!tmp->is_active)
1491                                 continue;
1492
1493                         /*
1494                          * The current mode switch would be exclusive, but
1495                          * another context is active ... refuse the switch.
1496                          */
1497                         err = -EBUSY;
1498                         goto out;
1499                 }
1500         }
1501
1502         /* success */
1503         iwl_teardown_interface(priv, vif, true);
1504         vif->type = newviftype;
1505         vif->p2p = newp2p;
1506         err = iwl_setup_interface(priv, ctx);
1507         WARN_ON(err);
1508         /*
1509          * We've switched internally, but submitting to the
1510          * device may have failed for some reason. Mask this
1511          * error, because otherwise mac80211 will not switch
1512          * (and set the interface type back) and we'll be
1513          * out of sync with it.
1514          */
1515         err = 0;
1516
1517  out:
1518         mutex_unlock(&priv->mutex);
1519         IWL_DEBUG_MAC80211(priv, "leave\n");
1520
1521         return err;
1522 }
1523
1524 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1525                               struct ieee80211_vif *vif,
1526                               struct cfg80211_scan_request *req)
1527 {
1528         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1529         int ret;
1530
1531         IWL_DEBUG_MAC80211(priv, "enter\n");
1532
1533         if (req->n_channels == 0)
1534                 return -EINVAL;
1535
1536         mutex_lock(&priv->mutex);
1537
1538         /*
1539          * If an internal scan is in progress, just set
1540          * up the scan_request as per above.
1541          */
1542         if (priv->scan_type != IWL_SCAN_NORMAL) {
1543                 IWL_DEBUG_SCAN(priv,
1544                                "SCAN request during internal scan - defer\n");
1545                 priv->scan_request = req;
1546                 priv->scan_vif = vif;
1547                 ret = 0;
1548         } else {
1549                 priv->scan_request = req;
1550                 priv->scan_vif = vif;
1551                 /*
1552                  * mac80211 will only ask for one band at a time
1553                  * so using channels[0] here is ok
1554                  */
1555                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1556                                         req->channels[0]->band);
1557                 if (ret) {
1558                         priv->scan_request = NULL;
1559                         priv->scan_vif = NULL;
1560                 }
1561         }
1562
1563         IWL_DEBUG_MAC80211(priv, "leave\n");
1564
1565         mutex_unlock(&priv->mutex);
1566
1567         return ret;
1568 }
1569
1570 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1571 {
1572         struct iwl_addsta_cmd cmd = {
1573                 .mode = STA_CONTROL_MODIFY_MSK,
1574                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1575                 .sta.sta_id = sta_id,
1576         };
1577
1578         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1579 }
1580
1581 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1582                                   struct ieee80211_vif *vif,
1583                                   enum sta_notify_cmd cmd,
1584                                   struct ieee80211_sta *sta)
1585 {
1586         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1587         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1588         int sta_id;
1589
1590         IWL_DEBUG_MAC80211(priv, "enter\n");
1591
1592         switch (cmd) {
1593         case STA_NOTIFY_SLEEP:
1594                 WARN_ON(!sta_priv->client);
1595                 sta_priv->asleep = true;
1596                 if (atomic_read(&sta_priv->pending_frames) > 0)
1597                         ieee80211_sta_block_awake(hw, sta, true);
1598                 break;
1599         case STA_NOTIFY_AWAKE:
1600                 WARN_ON(!sta_priv->client);
1601                 if (!sta_priv->asleep)
1602                         break;
1603                 sta_priv->asleep = false;
1604                 sta_id = iwl_sta_id(sta);
1605                 if (sta_id != IWL_INVALID_STATION)
1606                         iwl_sta_modify_ps_wake(priv, sta_id);
1607                 break;
1608         default:
1609                 break;
1610         }
1611         IWL_DEBUG_MAC80211(priv, "leave\n");
1612 }
1613
1614 struct ieee80211_ops iwlagn_hw_ops = {
1615         .tx = iwlagn_mac_tx,
1616         .start = iwlagn_mac_start,
1617         .stop = iwlagn_mac_stop,
1618 #ifdef CONFIG_PM_SLEEP
1619         .suspend = iwlagn_mac_suspend,
1620         .resume = iwlagn_mac_resume,
1621         .set_wakeup = iwlagn_mac_set_wakeup,
1622 #endif
1623         .add_interface = iwlagn_mac_add_interface,
1624         .remove_interface = iwlagn_mac_remove_interface,
1625         .change_interface = iwlagn_mac_change_interface,
1626         .config = iwlagn_mac_config,
1627         .configure_filter = iwlagn_configure_filter,
1628         .set_key = iwlagn_mac_set_key,
1629         .update_tkip_key = iwlagn_mac_update_tkip_key,
1630         .set_rekey_data = iwlagn_mac_set_rekey_data,
1631         .conf_tx = iwlagn_mac_conf_tx,
1632         .bss_info_changed = iwlagn_bss_info_changed,
1633         .ampdu_action = iwlagn_mac_ampdu_action,
1634         .hw_scan = iwlagn_mac_hw_scan,
1635         .sta_notify = iwlagn_mac_sta_notify,
1636         .sta_state = iwlagn_mac_sta_state,
1637         .channel_switch = iwlagn_mac_channel_switch,
1638         .flush = iwlagn_mac_flush,
1639         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1640         .remain_on_channel = iwlagn_mac_remain_on_channel,
1641         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1642         .rssi_callback = iwlagn_mac_rssi_callback,
1643         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1644         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1645         .set_tim = iwlagn_mac_set_tim,
1646 };
1647
1648 /* This function both allocates and initializes hw and priv. */
1649 struct ieee80211_hw *iwl_alloc_all(void)
1650 {
1651         struct iwl_priv *priv;
1652         struct iwl_op_mode *op_mode;
1653         /* mac80211 allocates memory for this device instance, including
1654          *   space for this driver's private structure */
1655         struct ieee80211_hw *hw;
1656
1657         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1658                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1659         if (!hw)
1660                 goto out;
1661
1662         op_mode = hw->priv;
1663         priv = IWL_OP_MODE_GET_DVM(op_mode);
1664         priv->hw = hw;
1665
1666 out:
1667         return hw;
1668 }