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->nvm_data->sku_cap_11n_enable)
 168                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 169                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 170
 171         /*
 172          * Enable 11w if advertised by firmware and software crypto
 173          * is not enabled (as the firmware will interpret some mgmt
 174          * packets, so enabling it with software crypto isn't safe)
 175          */
 176         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 177             !iwlwifi_mod_params.sw_crypto)
 178                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 179
 180         hw->sta_data_size = sizeof(struct iwl_station_priv);
 181         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 182
 183         for_each_context(priv, ctx) {
 184                 hw->wiphy->interface_modes |= ctx->interface_modes;
 185                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 186         }
 187
 188         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 189
 190         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 191                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 192                 hw->wiphy->n_iface_combinations =
 193                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 194         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 195                 hw->wiphy->iface_combinations =
 196                         iwlagn_iface_combinations_dualmode;
 197                 hw->wiphy->n_iface_combinations =
 198                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 199         }
 200
 201         hw->wiphy->max_remain_on_channel_duration = 500;
 202
 203         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 204                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 205                             WIPHY_FLAG_IBSS_RSN;
 206
 207 #ifdef CONFIG_PM_SLEEP
 208         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 209             priv->trans->ops->wowlan_suspend &&
 210             device_can_wakeup(priv->trans->dev)) {
 211                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 212                                           WIPHY_WOWLAN_DISCONNECT |
 213                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 214                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 215                 if (!iwlwifi_mod_params.sw_crypto)
 216                         hw->wiphy->wowlan.flags |=
 217                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 218                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 219
 220                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 221                 hw->wiphy->wowlan.pattern_min_len =
 222                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 223                 hw->wiphy->wowlan.pattern_max_len =
 224                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 225         }
 226 #endif
 227
 228         if (iwlwifi_mod_params.power_save)
 229                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 230         else
 231                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 232
 233         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 234         /* we create the 802.11 header and a max-length SSID element */
 235         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 236
 237         /*
 238          * We don't use all queues: 4 and 9 are unused and any
 239          * aggregation queue gets mapped down to the AC queue.
 240          */
 241         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 242
 243         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 244
 245         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 246                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 247                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 248         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 249                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 250                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 251
 252         hw->wiphy->hw_version = priv->trans->hw_id;
 253
 254         iwl_leds_init(priv);
 255
 256         ret = ieee80211_register_hw(priv->hw);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 259                 iwl_leds_exit(priv);
 260                 return ret;
 261         }
 262         priv->mac80211_registered = 1;
 263
 264         return 0;
 265 }
 266
 267 void iwlagn_mac_unregister(struct iwl_priv *priv)
 268 {
 269         if (!priv->mac80211_registered)
 270                 return;
 271         iwl_leds_exit(priv);
 272         ieee80211_unregister_hw(priv->hw);
 273         priv->mac80211_registered = 0;
 274 }
 275
 276 static int __iwl_up(struct iwl_priv *priv)
 277 {
 278         struct iwl_rxon_context *ctx;
 279         int ret;
 280
 281         lockdep_assert_held(&priv->mutex);
 282
 283         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 284                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 285                 return -EIO;
 286         }
 287
 288         for_each_context(priv, ctx) {
 289                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 290                 if (ret) {
 291                         iwl_dealloc_bcast_stations(priv);
 292                         return ret;
 293                 }
 294         }
 295
 296         ret = iwl_run_init_ucode(priv);
 297         if (ret) {
 298                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 299                 goto error;
 300         }
 301
 302         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 303         if (ret) {
 304                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 305                 goto error;
 306         }
 307
 308         ret = iwl_alive_start(priv);
 309         if (ret)
 310                 goto error;
 311         return 0;
 312
 313  error:
 314         set_bit(STATUS_EXIT_PENDING, &priv->status);
 315         iwl_down(priv);
 316         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 317
 318         IWL_ERR(priv, "Unable to initialize device.\n");
 319         return ret;
 320 }
 321
 322 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 323 {
 324         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 325         int ret;
 326
 327         IWL_DEBUG_MAC80211(priv, "enter\n");
 328
 329         /* we should be verifying the device is ready to be opened */
 330         mutex_lock(&priv->mutex);
 331         ret = __iwl_up(priv);
 332         mutex_unlock(&priv->mutex);
 333         if (ret)
 334                 return ret;
 335
 336         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 337
 338         /* Now we should be done, and the READY bit should be set. */
 339         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 340                 ret = -EIO;
 341
 342         iwlagn_led_enable(priv);
 343
 344         priv->is_open = 1;
 345         IWL_DEBUG_MAC80211(priv, "leave\n");
 346         return 0;
 347 }
 348
 349 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 350 {
 351         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354
 355         if (!priv->is_open)
 356                 return;
 357
 358         priv->is_open = 0;
 359
 360         mutex_lock(&priv->mutex);
 361         iwl_down(priv);
 362         mutex_unlock(&priv->mutex);
 363
 364         iwl_cancel_deferred_work(priv);
 365
 366         flush_workqueue(priv->workqueue);
 367
 368         /* User space software may expect getting rfkill changes
 369          * even if interface is down, trans->down will leave the RF
 370          * kill interrupt enabled
 371          */
 372         iwl_trans_stop_hw(priv->trans, false);
 373
 374         IWL_DEBUG_MAC80211(priv, "leave\n");
 375 }
 376
 377 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 378                                       struct ieee80211_vif *vif,
 379                                       struct cfg80211_gtk_rekey_data *data)
 380 {
 381         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 382
 383         if (iwlwifi_mod_params.sw_crypto)
 384                 return;
 385
 386         IWL_DEBUG_MAC80211(priv, "enter\n");
 387         mutex_lock(&priv->mutex);
 388
 389         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 390                 goto out;
 391
 392         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 393         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 394         priv->replay_ctr =
 395                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 396         priv->have_rekey_data = true;
 397
 398  out:
 399         mutex_unlock(&priv->mutex);
 400         IWL_DEBUG_MAC80211(priv, "leave\n");
 401 }
 402
 403 #ifdef CONFIG_PM_SLEEP
 404
 405 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 406                               struct cfg80211_wowlan *wowlan)
 407 {
 408         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 409         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 410         int ret;
 411
 412         if (WARN_ON(!wowlan))
 413                 return -EINVAL;
 414
 415         IWL_DEBUG_MAC80211(priv, "enter\n");
 416         mutex_lock(&priv->mutex);
 417
 418         /* Don't attempt WoWLAN when not associated, tear down instead. */
 419         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 420             !iwl_is_associated_ctx(ctx)) {
 421                 ret = 1;
 422                 goto out;
 423         }
 424
 425         ret = iwlagn_suspend(priv, wowlan);
 426         if (ret)
 427                 goto error;
 428
 429         iwl_trans_wowlan_suspend(priv->trans);
 430
 431         goto out;
 432
 433  error:
 434         priv->wowlan = false;
 435         iwlagn_prepare_restart(priv);
 436         ieee80211_restart_hw(priv->hw);
 437  out:
 438         mutex_unlock(&priv->mutex);
 439         IWL_DEBUG_MAC80211(priv, "leave\n");
 440
 441         return ret;
 442 }
 443
 444 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 445 {
 446         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 447         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 448         struct ieee80211_vif *vif;
 449         unsigned long flags;
 450         u32 base, status = 0xffffffff;
 451         int ret = -EIO;
 452
 453         IWL_DEBUG_MAC80211(priv, "enter\n");
 454         mutex_lock(&priv->mutex);
 455
 456         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 457                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 458
 459         base = priv->device_pointers.error_event_table;
 460         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 461                 spin_lock_irqsave(&priv->trans->reg_lock, flags);
 462                 ret = iwl_grab_nic_access_silent(priv->trans);
 463                 if (likely(ret == 0)) {
 464                         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
 465                         status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 466                         iwl_release_nic_access(priv->trans);
 467                 }
 468                 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
 469
 470 #ifdef CONFIG_IWLWIFI_DEBUGFS
 471                 if (ret == 0) {
 472                         const struct fw_img *img;
 473
 474                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 475                         if (!priv->wowlan_sram) {
 476                                 priv->wowlan_sram =
 477                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 478                                                 GFP_KERNEL);
 479                         }
 480
 481                         if (priv->wowlan_sram)
 482                                 _iwl_read_targ_mem_dwords(
 483                                       priv->trans, 0x800000,
 484                                       priv->wowlan_sram,
 485                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 486                 }
 487 #endif
 488         }
 489
 490         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 491         vif = ctx->vif;
 492
 493         priv->wowlan = false;
 494
 495         iwlagn_prepare_restart(priv);
 496
 497         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 498         iwl_connection_init_rx_config(priv, ctx);
 499         iwlagn_set_rxon_chain(priv, ctx);
 500
 501         mutex_unlock(&priv->mutex);
 502         IWL_DEBUG_MAC80211(priv, "leave\n");
 503
 504         ieee80211_resume_disconnect(vif);
 505
 506         return 1;
 507 }
 508
 509 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 510 {
 511         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 512
 513         device_set_wakeup_enable(priv->trans->dev, enabled);
 514 }
 515 #endif
 516
 517 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 518                           struct ieee80211_tx_control *control,
 519                           struct sk_buff *skb)
 520 {
 521         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 522
 523         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 524                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 525
 526         if (iwlagn_tx_skb(priv, control->sta, skb))
 527                 ieee80211_free_txskb(hw, skb);
 528 }
 529
 530 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 531                                        struct ieee80211_vif *vif,
 532                                        struct ieee80211_key_conf *keyconf,
 533                                        struct ieee80211_sta *sta,
 534                                        u32 iv32, u16 *phase1key)
 535 {
 536         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 537
 538         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 539 }
 540
 541 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 542                               struct ieee80211_vif *vif,
 543                               struct ieee80211_sta *sta,
 544                               struct ieee80211_key_conf *key)
 545 {
 546         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 547         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 548         struct iwl_rxon_context *ctx = vif_priv->ctx;
 549         int ret;
 550         bool is_default_wep_key = false;
 551
 552         IWL_DEBUG_MAC80211(priv, "enter\n");
 553
 554         if (iwlwifi_mod_params.sw_crypto) {
 555                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 556                 return -EOPNOTSUPP;
 557         }
 558
 559         switch (key->cipher) {
 560         case WLAN_CIPHER_SUITE_TKIP:
 561                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 562                 /* fall through */
 563         case WLAN_CIPHER_SUITE_CCMP:
 564                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 565                 break;
 566         default:
 567                 break;
 568         }
 569
 570         /*
 571          * We could program these keys into the hardware as well, but we
 572          * don't expect much multicast traffic in IBSS and having keys
 573          * for more stations is probably more useful.
 574          *
 575          * Mark key TX-only and return 0.
 576          */
 577         if (vif->type == NL80211_IFTYPE_ADHOC &&
 578             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 579                 key->hw_key_idx = WEP_INVALID_OFFSET;
 580                 return 0;
 581         }
 582
 583         /* If they key was TX-only, accept deletion */
 584         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 585                 return 0;
 586
 587         mutex_lock(&priv->mutex);
 588         iwl_scan_cancel_timeout(priv, 100);
 589
 590         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 591
 592         /*
 593          * If we are getting WEP group key and we didn't receive any key mapping
 594          * so far, we are in legacy wep mode (group key only), otherwise we are
 595          * in 1X mode.
 596          * In legacy wep mode, we use another host command to the uCode.
 597          */
 598         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 599              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 600                 if (cmd == SET_KEY)
 601                         is_default_wep_key = !ctx->key_mapping_keys;
 602                 else
 603                         is_default_wep_key =
 604                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 605         }
 606
 607
 608         switch (cmd) {
 609         case SET_KEY:
 610                 if (is_default_wep_key) {
 611                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 612                         break;
 613                 }
 614                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 615                 if (ret) {
 616                         /*
 617                          * can't add key for RX, but we don't need it
 618                          * in the device for TX so still return 0
 619                          */
 620                         ret = 0;
 621                         key->hw_key_idx = WEP_INVALID_OFFSET;
 622                 }
 623
 624                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 625                 break;
 626         case DISABLE_KEY:
 627                 if (is_default_wep_key)
 628                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 629                 else
 630                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 631
 632                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 633                 break;
 634         default:
 635                 ret = -EINVAL;
 636         }
 637
 638         mutex_unlock(&priv->mutex);
 639         IWL_DEBUG_MAC80211(priv, "leave\n");
 640
 641         return ret;
 642 }
 643
 644 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 645                                    struct ieee80211_vif *vif,
 646                                    enum ieee80211_ampdu_mlme_action action,
 647                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 648                                    u8 buf_size)
 649 {
 650         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 651         int ret = -EINVAL;
 652         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 653
 654         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 655                      sta->addr, tid);
 656
 657         if (!(priv->nvm_data->sku_cap_11n_enable))
 658                 return -EACCES;
 659
 660         IWL_DEBUG_MAC80211(priv, "enter\n");
 661         mutex_lock(&priv->mutex);
 662
 663         switch (action) {
 664         case IEEE80211_AMPDU_RX_START:
 665                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 666                         break;
 667                 IWL_DEBUG_HT(priv, "start Rx\n");
 668                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 669                 break;
 670         case IEEE80211_AMPDU_RX_STOP:
 671                 IWL_DEBUG_HT(priv, "stop Rx\n");
 672                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 673                 break;
 674         case IEEE80211_AMPDU_TX_START:
 675                 if (!priv->trans->ops->txq_enable)
 676                         break;
 677                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 678                         break;
 679                 IWL_DEBUG_HT(priv, "start Tx\n");
 680                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 681                 break;
 682         case IEEE80211_AMPDU_TX_STOP:
 683                 IWL_DEBUG_HT(priv, "stop Tx\n");
 684                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 685                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 686                         priv->agg_tids_count--;
 687                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 688                                      priv->agg_tids_count);
 689                 }
 690                 if (!priv->agg_tids_count &&
 691                     priv->hw_params.use_rts_for_aggregation) {
 692                         /*
 693                          * switch off RTS/CTS if it was previously enabled
 694                          */
 695                         sta_priv->lq_sta.lq.general_params.flags &=
 696                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 697                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 698                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 699                 }
 700                 break;
 701         case IEEE80211_AMPDU_TX_OPERATIONAL:
 702                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 703                 break;
 704         }
 705         mutex_unlock(&priv->mutex);
 706         IWL_DEBUG_MAC80211(priv, "leave\n");
 707         return ret;
 708 }
 709
 710 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 711                               struct ieee80211_vif *vif,
 712                               struct ieee80211_sta *sta)
 713 {
 714         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 715         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 716         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 717         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 718         int ret;
 719         u8 sta_id;
 720
 721         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 722                         sta->addr);
 723         sta_priv->sta_id = IWL_INVALID_STATION;
 724
 725         atomic_set(&sta_priv->pending_frames, 0);
 726         if (vif->type == NL80211_IFTYPE_AP)
 727                 sta_priv->client = true;
 728
 729         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 730                                      is_ap, sta, &sta_id);
 731         if (ret) {
 732                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 733                         sta->addr, ret);
 734                 /* Should we return success if return code is EEXIST ? */
 735                 return ret;
 736         }
 737
 738         sta_priv->sta_id = sta_id;
 739
 740         return 0;
 741 }
 742
 743 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 744                                  struct ieee80211_vif *vif,
 745                                  struct ieee80211_sta *sta)
 746 {
 747         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 748         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 749         int ret;
 750
 751         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 752
 753         if (vif->type == NL80211_IFTYPE_STATION) {
 754                 /*
 755                  * Station will be removed from device when the RXON
 756                  * is set to unassociated -- just deactivate it here
 757                  * to avoid re-programming it.
 758                  */
 759                 ret = 0;
 760                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 761         } else {
 762                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 763                 if (ret)
 764                         IWL_DEBUG_QUIET_RFKILL(priv,
 765                                 "Error removing station %pM\n", sta->addr);
 766         }
 767         return ret;
 768 }
 769
 770 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 771                                 struct ieee80211_vif *vif,
 772                                 struct ieee80211_sta *sta,
 773                                 enum ieee80211_sta_state old_state,
 774                                 enum ieee80211_sta_state new_state)
 775 {
 776         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 777         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 778         enum {
 779                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 780         } op = NONE;
 781         int ret;
 782
 783         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 784                            sta->addr, old_state, new_state);
 785
 786         mutex_lock(&priv->mutex);
 787         if (vif->type == NL80211_IFTYPE_STATION) {
 788                 if (old_state == IEEE80211_STA_NOTEXIST &&
 789                     new_state == IEEE80211_STA_NONE)
 790                         op = ADD;
 791                 else if (old_state == IEEE80211_STA_NONE &&
 792                          new_state == IEEE80211_STA_NOTEXIST)
 793                         op = REMOVE;
 794                 else if (old_state == IEEE80211_STA_AUTH &&
 795                          new_state == IEEE80211_STA_ASSOC)
 796                         op = HT_RATE_INIT;
 797         } else {
 798                 if (old_state == IEEE80211_STA_AUTH &&
 799                     new_state == IEEE80211_STA_ASSOC)
 800                         op = ADD_RATE_INIT;
 801                 else if (old_state == IEEE80211_STA_ASSOC &&
 802                          new_state == IEEE80211_STA_AUTH)
 803                         op = REMOVE;
 804         }
 805
 806         switch (op) {
 807         case ADD:
 808                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 809                 if (ret)
 810                         break;
 811                 /*
 812                  * Clear the in-progress flag, the AP station entry was added
 813                  * but we'll initialize LQ only when we've associated (which
 814                  * would also clear the in-progress flag). This is necessary
 815                  * in case we never initialize LQ because association fails.
 816                  */
 817                 spin_lock_bh(&priv->sta_lock);
 818                 priv->stations[iwl_sta_id(sta)].used &=
 819                         ~IWL_STA_UCODE_INPROGRESS;
 820                 spin_unlock_bh(&priv->sta_lock);
 821                 break;
 822         case REMOVE:
 823                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 824                 break;
 825         case ADD_RATE_INIT:
 826                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 827                 if (ret)
 828                         break;
 829                 /* Initialize rate scaling */
 830                 IWL_DEBUG_INFO(priv,
 831                                "Initializing rate scaling for station %pM\n",
 832                                sta->addr);
 833                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 834                 ret = 0;
 835                 break;
 836         case HT_RATE_INIT:
 837                 /* Initialize rate scaling */
 838                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 839                 if (ret)
 840                         break;
 841                 IWL_DEBUG_INFO(priv,
 842                                "Initializing rate scaling for station %pM\n",
 843                                sta->addr);
 844                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 845                 ret = 0;
 846                 break;
 847         default:
 848                 ret = 0;
 849                 break;
 850         }
 851
 852         /*
 853          * mac80211 might WARN if we fail, but due the way we
 854          * (badly) handle hard rfkill, we might fail here
 855          */
 856         if (iwl_is_rfkill(priv))
 857                 ret = 0;
 858
 859         mutex_unlock(&priv->mutex);
 860         IWL_DEBUG_MAC80211(priv, "leave\n");
 861
 862         return ret;
 863 }
 864
 865 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 866                                       struct ieee80211_channel_switch *ch_switch)
 867 {
 868         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 869         struct ieee80211_conf *conf = &hw->conf;
 870         struct ieee80211_channel *channel = ch_switch->channel;
 871         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 872         /*
 873          * MULTI-FIXME
 874          * When we add support for multiple interfaces, we need to
 875          * revisit this. The channel switch command in the device
 876          * only affects the BSS context, but what does that really
 877          * mean? And what if we get a CSA on the second interface?
 878          * This needs a lot of work.
 879          */
 880         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 881         u16 ch;
 882
 883         IWL_DEBUG_MAC80211(priv, "enter\n");
 884
 885         mutex_lock(&priv->mutex);
 886
 887         if (iwl_is_rfkill(priv))
 888                 goto out;
 889
 890         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 891             test_bit(STATUS_SCANNING, &priv->status) ||
 892             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 893                 goto out;
 894
 895         if (!iwl_is_associated_ctx(ctx))
 896                 goto out;
 897
 898         if (!priv->lib->set_channel_switch)
 899                 goto out;
 900
 901         ch = channel->hw_value;
 902         if (le16_to_cpu(ctx->active.channel) == ch)
 903                 goto out;
 904
 905         priv->current_ht_config.smps = conf->smps_mode;
 906
 907         /* Configure HT40 channels */
 908         ctx->ht.enabled = conf_is_ht(conf);
 909         if (ctx->ht.enabled)
 910                 iwlagn_config_ht40(conf, ctx);
 911         else
 912                 ctx->ht.is_40mhz = false;
 913
 914         if ((le16_to_cpu(ctx->staging.channel) != ch))
 915                 ctx->staging.flags = 0;
 916
 917         iwl_set_rxon_channel(priv, channel, ctx);
 918         iwl_set_rxon_ht(priv, ht_conf);
 919         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 920
 921         /*
 922          * at this point, staging_rxon has the
 923          * configuration for channel switch
 924          */
 925         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 926         priv->switch_channel = cpu_to_le16(ch);
 927         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 928                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 929                 priv->switch_channel = 0;
 930                 ieee80211_chswitch_done(ctx->vif, false);
 931         }
 932
 933 out:
 934         mutex_unlock(&priv->mutex);
 935         IWL_DEBUG_MAC80211(priv, "leave\n");
 936 }
 937
 938 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 939 {
 940         /*
 941          * MULTI-FIXME
 942          * See iwlagn_mac_channel_switch.
 943          */
 944         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 945
 946         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 947                 return;
 948
 949         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 950                 ieee80211_chswitch_done(ctx->vif, is_success);
 951 }
 952
 953 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 954                                     unsigned int changed_flags,
 955                                     unsigned int *total_flags,
 956                                     u64 multicast)
 957 {
 958         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 959         __le32 filter_or = 0, filter_nand = 0;
 960         struct iwl_rxon_context *ctx;
 961
 962 #define CHK(test, flag) do { \
 963         if (*total_flags & (test))              \
 964                 filter_or |= (flag);            \
 965         else                                    \
 966                 filter_nand |= (flag);          \
 967         } while (0)
 968
 969         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 970                         changed_flags, *total_flags);
 971
 972         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 973         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 974         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 975         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 976
 977 #undef CHK
 978
 979         mutex_lock(&priv->mutex);
 980
 981         for_each_context(priv, ctx) {
 982                 ctx->staging.filter_flags &= ~filter_nand;
 983                 ctx->staging.filter_flags |= filter_or;
 984
 985                 /*
 986                  * Not committing directly because hardware can perform a scan,
 987                  * but we'll eventually commit the filter flags change anyway.
 988                  */
 989         }
 990
 991         mutex_unlock(&priv->mutex);
 992
 993         /*
 994          * Receiving all multicast frames is always enabled by the
 995          * default flags setup in iwl_connection_init_rx_config()
 996          * since we currently do not support programming multicast
 997          * filters into the device.
 998          */
 999         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1000                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1001 }
1002
1003 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1004 {
1005         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1006
1007         mutex_lock(&priv->mutex);
1008         IWL_DEBUG_MAC80211(priv, "enter\n");
1009
1010         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1011                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1012                 goto done;
1013         }
1014         if (iwl_is_rfkill(priv)) {
1015                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1016                 goto done;
1017         }
1018
1019         /*
1020          * mac80211 will not push any more frames for transmit
1021          * until the flush is completed
1022          */
1023         if (drop) {
1024                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1025                 if (iwlagn_txfifo_flush(priv)) {
1026                         IWL_ERR(priv, "flush request fail\n");
1027                         goto done;
1028                 }
1029         }
1030         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1031         iwl_trans_wait_tx_queue_empty(priv->trans);
1032 done:
1033         mutex_unlock(&priv->mutex);
1034         IWL_DEBUG_MAC80211(priv, "leave\n");
1035 }
1036
1037 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1038                                      struct ieee80211_vif *vif,
1039                                      struct ieee80211_channel *channel,
1040                                      int duration)
1041 {
1042         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1043         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1044         int err = 0;
1045
1046         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1047                 return -EOPNOTSUPP;
1048
1049         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1050                 return -EOPNOTSUPP;
1051
1052         IWL_DEBUG_MAC80211(priv, "enter\n");
1053         mutex_lock(&priv->mutex);
1054
1055         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1056                 /* mac80211 should not scan while ROC or ROC while scanning */
1057                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1058                         err = -EBUSY;
1059                         goto out;
1060                 }
1061
1062                 iwl_scan_cancel_timeout(priv, 100);
1063
1064                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1065                         err = -EBUSY;
1066                         goto out;
1067                 }
1068         }
1069
1070         priv->hw_roc_channel = channel;
1071         /* convert from ms to TU */
1072         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1073         priv->hw_roc_start_notified = false;
1074         cancel_delayed_work(&priv->hw_roc_disable_work);
1075
1076         if (!ctx->is_active) {
1077                 static const struct iwl_qos_info default_qos_data = {
1078                         .def_qos_parm = {
1079                                 .ac[0] = {
1080                                         .cw_min = cpu_to_le16(3),
1081                                         .cw_max = cpu_to_le16(7),
1082                                         .aifsn = 2,
1083                                         .edca_txop = cpu_to_le16(1504),
1084                                 },
1085                                 .ac[1] = {
1086                                         .cw_min = cpu_to_le16(7),
1087                                         .cw_max = cpu_to_le16(15),
1088                                         .aifsn = 2,
1089                                         .edca_txop = cpu_to_le16(3008),
1090                                 },
1091                                 .ac[2] = {
1092                                         .cw_min = cpu_to_le16(15),
1093                                         .cw_max = cpu_to_le16(1023),
1094                                         .aifsn = 3,
1095                                 },
1096                                 .ac[3] = {
1097                                         .cw_min = cpu_to_le16(15),
1098                                         .cw_max = cpu_to_le16(1023),
1099                                         .aifsn = 7,
1100                                 },
1101                         },
1102                 };
1103
1104                 ctx->is_active = true;
1105                 ctx->qos_data = default_qos_data;
1106                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1107                 memcpy(ctx->staging.node_addr,
1108                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1109                        ETH_ALEN);
1110                 memcpy(ctx->staging.bssid_addr,
1111                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1112                        ETH_ALEN);
1113                 err = iwlagn_commit_rxon(priv, ctx);
1114                 if (err)
1115                         goto out;
1116                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1117                                              RXON_FILTER_PROMISC_MSK |
1118                                              RXON_FILTER_CTL2HOST_MSK;
1119
1120                 err = iwlagn_commit_rxon(priv, ctx);
1121                 if (err) {
1122                         iwlagn_disable_roc(priv);
1123                         goto out;
1124                 }
1125                 priv->hw_roc_setup = true;
1126         }
1127
1128         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1129         if (err)
1130                 iwlagn_disable_roc(priv);
1131
1132  out:
1133         mutex_unlock(&priv->mutex);
1134         IWL_DEBUG_MAC80211(priv, "leave\n");
1135
1136         return err;
1137 }
1138
1139 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1140 {
1141         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1142
1143         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1144                 return -EOPNOTSUPP;
1145
1146         IWL_DEBUG_MAC80211(priv, "enter\n");
1147         mutex_lock(&priv->mutex);
1148         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1149         iwlagn_disable_roc(priv);
1150         mutex_unlock(&priv->mutex);
1151         IWL_DEBUG_MAC80211(priv, "leave\n");
1152
1153         return 0;
1154 }
1155
1156 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1157                                      enum ieee80211_rssi_event rssi_event)
1158 {
1159         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1160
1161         IWL_DEBUG_MAC80211(priv, "enter\n");
1162         mutex_lock(&priv->mutex);
1163
1164         if (priv->cfg->bt_params &&
1165                         priv->cfg->bt_params->advanced_bt_coexist) {
1166                 if (rssi_event == RSSI_EVENT_LOW)
1167                         priv->bt_enable_pspoll = true;
1168                 else if (rssi_event == RSSI_EVENT_HIGH)
1169                         priv->bt_enable_pspoll = false;
1170
1171                 iwlagn_send_advance_bt_config(priv);
1172         } else {
1173                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1174                                 "ignoring RSSI callback\n");
1175         }
1176
1177         mutex_unlock(&priv->mutex);
1178         IWL_DEBUG_MAC80211(priv, "leave\n");
1179 }
1180
1181 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1182                               struct ieee80211_sta *sta, bool set)
1183 {
1184         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1185
1186         queue_work(priv->workqueue, &priv->beacon_update);
1187
1188         return 0;
1189 }
1190
1191 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1192                               struct ieee80211_vif *vif, u16 queue,
1193                               const struct ieee80211_tx_queue_params *params)
1194 {
1195         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1196         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1197         struct iwl_rxon_context *ctx = vif_priv->ctx;
1198         int q;
1199
1200         if (WARN_ON(!ctx))
1201                 return -EINVAL;
1202
1203         IWL_DEBUG_MAC80211(priv, "enter\n");
1204
1205         if (!iwl_is_ready_rf(priv)) {
1206                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1207                 return -EIO;
1208         }
1209
1210         if (queue >= AC_NUM) {
1211                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1212                 return 0;
1213         }
1214
1215         q = AC_NUM - 1 - queue;
1216
1217         mutex_lock(&priv->mutex);
1218
1219         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1220                 cpu_to_le16(params->cw_min);
1221         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1222                 cpu_to_le16(params->cw_max);
1223         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1224         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1225                         cpu_to_le16((params->txop * 32));
1226
1227         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1228
1229         mutex_unlock(&priv->mutex);
1230
1231         IWL_DEBUG_MAC80211(priv, "leave\n");
1232         return 0;
1233 }
1234
1235 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1236 {
1237         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1238
1239         return priv->ibss_manager == IWL_IBSS_MANAGER;
1240 }
1241
1242 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1243 {
1244         iwl_connection_init_rx_config(priv, ctx);
1245
1246         iwlagn_set_rxon_chain(priv, ctx);
1247
1248         return iwlagn_commit_rxon(priv, ctx);
1249 }
1250
1251 static int iwl_setup_interface(struct iwl_priv *priv,
1252                                struct iwl_rxon_context *ctx)
1253 {
1254         struct ieee80211_vif *vif = ctx->vif;
1255         int err, ac;
1256
1257         lockdep_assert_held(&priv->mutex);
1258
1259         /*
1260          * This variable will be correct only when there's just
1261          * a single context, but all code using it is for hardware
1262          * that supports only one context.
1263          */
1264         priv->iw_mode = vif->type;
1265
1266         ctx->is_active = true;
1267
1268         err = iwl_set_mode(priv, ctx);
1269         if (err) {
1270                 if (!ctx->always_active)
1271                         ctx->is_active = false;
1272                 return err;
1273         }
1274
1275         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1276             vif->type == NL80211_IFTYPE_ADHOC) {
1277                 /*
1278                  * pretend to have high BT traffic as long as we
1279                  * are operating in IBSS mode, as this will cause
1280                  * the rate scaling etc. to behave as intended.
1281                  */
1282                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1283         }
1284
1285         /* set up queue mappings */
1286         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1287                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1288
1289         if (vif->type == NL80211_IFTYPE_AP)
1290                 vif->cab_queue = ctx->mcast_queue;
1291         else
1292                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1293
1294         return 0;
1295 }
1296
1297 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1298                                     struct ieee80211_vif *vif)
1299 {
1300         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1301         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1302         struct iwl_rxon_context *tmp, *ctx = NULL;
1303         int err;
1304         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1305         bool reset = false;
1306
1307         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1308                            viftype, vif->addr);
1309
1310         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1311
1312         mutex_lock(&priv->mutex);
1313
1314         iwlagn_disable_roc(priv);
1315
1316         if (!iwl_is_ready_rf(priv)) {
1317                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1318                 err = -EINVAL;
1319                 goto out;
1320         }
1321
1322         for_each_context(priv, tmp) {
1323                 u32 possible_modes =
1324                         tmp->interface_modes | tmp->exclusive_interface_modes;
1325
1326                 if (tmp->vif) {
1327                         /* On reset we need to add the same interface again */
1328                         if (tmp->vif == vif) {
1329                                 reset = true;
1330                                 ctx = tmp;
1331                                 break;
1332                         }
1333
1334                         /* check if this busy context is exclusive */
1335                         if (tmp->exclusive_interface_modes &
1336                                                 BIT(tmp->vif->type)) {
1337                                 err = -EINVAL;
1338                                 goto out;
1339                         }
1340                         continue;
1341                 }
1342
1343                 if (!(possible_modes & BIT(viftype)))
1344                         continue;
1345
1346                 /* have maybe usable context w/o interface */
1347                 ctx = tmp;
1348                 break;
1349         }
1350
1351         if (!ctx) {
1352                 err = -EOPNOTSUPP;
1353                 goto out;
1354         }
1355
1356         vif_priv->ctx = ctx;
1357         ctx->vif = vif;
1358
1359         /*
1360          * In SNIFFER device type, the firmware reports the FCS to
1361          * the host, rather than snipping it off. Unfortunately,
1362          * mac80211 doesn't (yet) provide a per-packet flag for
1363          * this, so that we have to set the hardware flag based
1364          * on the interfaces added. As the monitor interface can
1365          * only be present by itself, and will be removed before
1366          * other interfaces are added, this is safe.
1367          */
1368         if (vif->type == NL80211_IFTYPE_MONITOR)
1369                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1370         else
1371                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1372
1373         err = iwl_setup_interface(priv, ctx);
1374         if (!err || reset)
1375                 goto out;
1376
1377         ctx->vif = NULL;
1378         priv->iw_mode = NL80211_IFTYPE_STATION;
1379  out:
1380         mutex_unlock(&priv->mutex);
1381
1382         IWL_DEBUG_MAC80211(priv, "leave\n");
1383         return err;
1384 }
1385
1386 static void iwl_teardown_interface(struct iwl_priv *priv,
1387                                    struct ieee80211_vif *vif,
1388                                    bool mode_change)
1389 {
1390         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1391
1392         lockdep_assert_held(&priv->mutex);
1393
1394         if (priv->scan_vif == vif) {
1395                 iwl_scan_cancel_timeout(priv, 200);
1396                 iwl_force_scan_end(priv);
1397         }
1398
1399         if (!mode_change) {
1400                 iwl_set_mode(priv, ctx);
1401                 if (!ctx->always_active)
1402                         ctx->is_active = false;
1403         }
1404
1405         /*
1406          * When removing the IBSS interface, overwrite the
1407          * BT traffic load with the stored one from the last
1408          * notification, if any. If this is a device that
1409          * doesn't implement this, this has no effect since
1410          * both values are the same and zero.
1411          */
1412         if (vif->type == NL80211_IFTYPE_ADHOC)
1413                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1414 }
1415
1416 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1417                               struct ieee80211_vif *vif)
1418 {
1419         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1420         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1421
1422         IWL_DEBUG_MAC80211(priv, "enter\n");
1423
1424         mutex_lock(&priv->mutex);
1425
1426         if (WARN_ON(ctx->vif != vif)) {
1427                 struct iwl_rxon_context *tmp;
1428                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1429                 for_each_context(priv, tmp)
1430                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1431                                 tmp->ctxid, tmp, tmp->vif);
1432         }
1433         ctx->vif = NULL;
1434
1435         iwl_teardown_interface(priv, vif, false);
1436
1437         mutex_unlock(&priv->mutex);
1438
1439         IWL_DEBUG_MAC80211(priv, "leave\n");
1440
1441 }
1442
1443 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1444                                        struct ieee80211_vif *vif,
1445                                        enum nl80211_iftype newtype, bool newp2p)
1446 {
1447         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1448         struct iwl_rxon_context *ctx, *tmp;
1449         enum nl80211_iftype newviftype = newtype;
1450         u32 interface_modes;
1451         int err;
1452
1453         IWL_DEBUG_MAC80211(priv, "enter\n");
1454
1455         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1456
1457         mutex_lock(&priv->mutex);
1458
1459         ctx = iwl_rxon_ctx_from_vif(vif);
1460
1461         /*
1462          * To simplify this code, only support changes on the
1463          * BSS context. The PAN context is usually reassigned
1464          * by creating/removing P2P interfaces anyway.
1465          */
1466         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1467                 err = -EBUSY;
1468                 goto out;
1469         }
1470
1471         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1472                 /*
1473                  * Huh? But wait ... this can maybe happen when
1474                  * we're in the middle of a firmware restart!
1475                  */
1476                 err = -EBUSY;
1477                 goto out;
1478         }
1479
1480         /* Check if the switch is supported in the same context */
1481         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1482         if (!(interface_modes & BIT(newtype))) {
1483                 err = -EBUSY;
1484                 goto out;
1485         }
1486
1487         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1488                 for_each_context(priv, tmp) {
1489                         if (ctx == tmp)
1490                                 continue;
1491
1492                         if (!tmp->is_active)
1493                                 continue;
1494
1495                         /*
1496                          * The current mode switch would be exclusive, but
1497                          * another context is active ... refuse the switch.
1498                          */
1499                         err = -EBUSY;
1500                         goto out;
1501                 }
1502         }
1503
1504         /* success */
1505         iwl_teardown_interface(priv, vif, true);
1506         vif->type = newviftype;
1507         vif->p2p = newp2p;
1508         err = iwl_setup_interface(priv, ctx);
1509         WARN_ON(err);
1510         /*
1511          * We've switched internally, but submitting to the
1512          * device may have failed for some reason. Mask this
1513          * error, because otherwise mac80211 will not switch
1514          * (and set the interface type back) and we'll be
1515          * out of sync with it.
1516          */
1517         err = 0;
1518
1519  out:
1520         mutex_unlock(&priv->mutex);
1521         IWL_DEBUG_MAC80211(priv, "leave\n");
1522
1523         return err;
1524 }
1525
1526 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1527                               struct ieee80211_vif *vif,
1528                               struct cfg80211_scan_request *req)
1529 {
1530         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1531         int ret;
1532
1533         IWL_DEBUG_MAC80211(priv, "enter\n");
1534
1535         if (req->n_channels == 0)
1536                 return -EINVAL;
1537
1538         mutex_lock(&priv->mutex);
1539
1540         /*
1541          * If an internal scan is in progress, just set
1542          * up the scan_request as per above.
1543          */
1544         if (priv->scan_type != IWL_SCAN_NORMAL) {
1545                 IWL_DEBUG_SCAN(priv,
1546                                "SCAN request during internal scan - defer\n");
1547                 priv->scan_request = req;
1548                 priv->scan_vif = vif;
1549                 ret = 0;
1550         } else {
1551                 priv->scan_request = req;
1552                 priv->scan_vif = vif;
1553                 /*
1554                  * mac80211 will only ask for one band at a time
1555                  * so using channels[0] here is ok
1556                  */
1557                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1558                                         req->channels[0]->band);
1559                 if (ret) {
1560                         priv->scan_request = NULL;
1561                         priv->scan_vif = NULL;
1562                 }
1563         }
1564
1565         IWL_DEBUG_MAC80211(priv, "leave\n");
1566
1567         mutex_unlock(&priv->mutex);
1568
1569         return ret;
1570 }
1571
1572 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1573 {
1574         struct iwl_addsta_cmd cmd = {
1575                 .mode = STA_CONTROL_MODIFY_MSK,
1576                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1577                 .sta.sta_id = sta_id,
1578         };
1579
1580         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1581 }
1582
1583 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1584                                   struct ieee80211_vif *vif,
1585                                   enum sta_notify_cmd cmd,
1586                                   struct ieee80211_sta *sta)
1587 {
1588         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1589         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1590         int sta_id;
1591
1592         IWL_DEBUG_MAC80211(priv, "enter\n");
1593
1594         switch (cmd) {
1595         case STA_NOTIFY_SLEEP:
1596                 WARN_ON(!sta_priv->client);
1597                 sta_priv->asleep = true;
1598                 if (atomic_read(&sta_priv->pending_frames) > 0)
1599                         ieee80211_sta_block_awake(hw, sta, true);
1600                 break;
1601         case STA_NOTIFY_AWAKE:
1602                 WARN_ON(!sta_priv->client);
1603                 if (!sta_priv->asleep)
1604                         break;
1605                 sta_priv->asleep = false;
1606                 sta_id = iwl_sta_id(sta);
1607                 if (sta_id != IWL_INVALID_STATION)
1608                         iwl_sta_modify_ps_wake(priv, sta_id);
1609                 break;
1610         default:
1611                 break;
1612         }
1613         IWL_DEBUG_MAC80211(priv, "leave\n");
1614 }
1615
1616 struct ieee80211_ops iwlagn_hw_ops = {
1617         .tx = iwlagn_mac_tx,
1618         .start = iwlagn_mac_start,
1619         .stop = iwlagn_mac_stop,
1620 #ifdef CONFIG_PM_SLEEP
1621         .suspend = iwlagn_mac_suspend,
1622         .resume = iwlagn_mac_resume,
1623         .set_wakeup = iwlagn_mac_set_wakeup,
1624 #endif
1625         .add_interface = iwlagn_mac_add_interface,
1626         .remove_interface = iwlagn_mac_remove_interface,
1627         .change_interface = iwlagn_mac_change_interface,
1628         .config = iwlagn_mac_config,
1629         .configure_filter = iwlagn_configure_filter,
1630         .set_key = iwlagn_mac_set_key,
1631         .update_tkip_key = iwlagn_mac_update_tkip_key,
1632         .set_rekey_data = iwlagn_mac_set_rekey_data,
1633         .conf_tx = iwlagn_mac_conf_tx,
1634         .bss_info_changed = iwlagn_bss_info_changed,
1635         .ampdu_action = iwlagn_mac_ampdu_action,
1636         .hw_scan = iwlagn_mac_hw_scan,
1637         .sta_notify = iwlagn_mac_sta_notify,
1638         .sta_state = iwlagn_mac_sta_state,
1639         .channel_switch = iwlagn_mac_channel_switch,
1640         .flush = iwlagn_mac_flush,
1641         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1642         .remain_on_channel = iwlagn_mac_remain_on_channel,
1643         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1644         .rssi_callback = iwlagn_mac_rssi_callback,
1645         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1646         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1647         .set_tim = iwlagn_mac_set_tim,
1648 };
1649
1650 /* This function both allocates and initializes hw and priv. */
1651 struct ieee80211_hw *iwl_alloc_all(void)
1652 {
1653         struct iwl_priv *priv;
1654         struct iwl_op_mode *op_mode;
1655         /* mac80211 allocates memory for this device instance, including
1656          *   space for this driver's private structure */
1657         struct ieee80211_hw *hw;
1658
1659         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1660                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1661         if (!hw)
1662                 goto out;
1663
1664         op_mode = hw->priv;
1665         priv = IWL_OP_MODE_GET_DVM(op_mode);
1666         priv->hw = hw;
1667
1668 out:
1669         return hw;
1670 }