Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/iwl-mac80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-eeprom.h"
  46 #include "iwl-dev.h"
  47 #include "iwl-io.h"
  48 #include "iwl-agn-calib.h"
  49 #include "iwl-agn.h"
  50 #include "iwl-trans.h"
  51 #include "iwl-op-mode.h"
  52 #include "iwl-modparams.h"
  53
  54 /*****************************************************************************
  55  *
  56  * mac80211 entry point functions
  57  *
  58  *****************************************************************************/
  59
  60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  61         {
  62                 .max = 1,
  63                 .types = BIT(NL80211_IFTYPE_STATION),
  64         },
  65         {
  66                 .max = 1,
  67                 .types = BIT(NL80211_IFTYPE_AP),
  68         },
  69 };
  70
  71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  72         {
  73                 .max = 2,
  74                 .types = BIT(NL80211_IFTYPE_STATION),
  75         },
  76 };
  77
  78 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  79         {
  80                 .max = 1,
  81                 .types = BIT(NL80211_IFTYPE_STATION),
  82         },
  83         {
  84                 .max = 1,
  85                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  86                          BIT(NL80211_IFTYPE_AP),
  87         },
  88 };
  89
  90 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  91         {
  92                 .max = 2,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  98         },
  99 };
 100
 101 static const struct ieee80211_iface_combination
 102 iwlagn_iface_combinations_dualmode[] = {
 103         { .num_different_channels = 1,
 104           .max_interfaces = 2,
 105           .beacon_int_infra_match = true,
 106           .limits = iwlagn_sta_ap_limits,
 107           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 108         },
 109         { .num_different_channels = 1,
 110           .max_interfaces = 2,
 111           .limits = iwlagn_2sta_limits,
 112           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 113         },
 114 };
 115
 116 static const struct ieee80211_iface_combination
 117 iwlagn_iface_combinations_p2p[] = {
 118         { .num_different_channels = 1,
 119           .max_interfaces = 2,
 120           .beacon_int_infra_match = true,
 121           .limits = iwlagn_p2p_sta_go_limits,
 122           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 123         },
 124         { .num_different_channels = 1,
 125           .max_interfaces = 2,
 126           .limits = iwlagn_p2p_2sta_limits,
 127           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 128         },
 129 };
 130
 131 /*
 132  * Not a mac80211 entry point function, but it fits in with all the
 133  * other mac80211 functions grouped here.
 134  */
 135 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 136                               const struct iwl_ucode_capabilities *capa)
 137 {
 138         int ret;
 139         struct ieee80211_hw *hw = priv->hw;
 140         struct iwl_rxon_context *ctx;
 141
 142         hw->rate_control_algorithm = "iwl-agn-rs";
 143
 144         /* Tell mac80211 our characteristics */
 145         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 146                     IEEE80211_HW_AMPDU_AGGREGATION |
 147                     IEEE80211_HW_NEED_DTIM_PERIOD |
 148                     IEEE80211_HW_SPECTRUM_MGMT |
 149                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 150                     IEEE80211_HW_QUEUE_CONTROL |
 151                     IEEE80211_HW_SUPPORTS_PS |
 152                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 153                     IEEE80211_HW_WANT_MONITOR_VIF |
 154                     IEEE80211_HW_SCAN_WHILE_IDLE;
 155
 156         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 157
 158         /*
 159          * Including the following line will crash some AP's.  This
 160          * workaround removes the stimulus which causes the crash until
 161          * the AP software can be fixed.
 162         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 163          */
 164
 165         if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE)
 166                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 167                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 168
 169 #ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
 170         /* enable 11w if the uCode advertise */
 171         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 172 #endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
 173                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 174
 175         hw->sta_data_size = sizeof(struct iwl_station_priv);
 176         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 177
 178         for_each_context(priv, ctx) {
 179                 hw->wiphy->interface_modes |= ctx->interface_modes;
 180                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 181         }
 182
 183         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 184
 185         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 186                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 187                 hw->wiphy->n_iface_combinations =
 188                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 189         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 190                 hw->wiphy->iface_combinations =
 191                         iwlagn_iface_combinations_dualmode;
 192                 hw->wiphy->n_iface_combinations =
 193                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 194         }
 195
 196         hw->wiphy->max_remain_on_channel_duration = 1000;
 197
 198         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 199                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 200                             WIPHY_FLAG_IBSS_RSN;
 201
 202 #ifdef CONFIG_PM_SLEEP
 203         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 204             priv->trans->ops->wowlan_suspend &&
 205             device_can_wakeup(priv->trans->dev)) {
 206                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 207                                           WIPHY_WOWLAN_DISCONNECT |
 208                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 209                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 210                 if (!iwlwifi_mod_params.sw_crypto)
 211                         hw->wiphy->wowlan.flags |=
 212                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 213                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 214
 215                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 216                 hw->wiphy->wowlan.pattern_min_len =
 217                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 218                 hw->wiphy->wowlan.pattern_max_len =
 219                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 220         }
 221 #endif
 222
 223         if (iwlwifi_mod_params.power_save)
 224                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 225         else
 226                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 227
 228         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 229         /* we create the 802.11 header and a max-length SSID element */
 230         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 231
 232         /*
 233          * We don't use all queues: 4 and 9 are unused and any
 234          * aggregation queue gets mapped down to the AC queue.
 235          */
 236         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 237
 238         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 239
 240         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 241                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 242                         &priv->bands[IEEE80211_BAND_2GHZ];
 243         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 244                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 245                         &priv->bands[IEEE80211_BAND_5GHZ];
 246
 247         hw->wiphy->hw_version = priv->trans->hw_id;
 248
 249         iwl_leds_init(priv);
 250
 251         ret = ieee80211_register_hw(priv->hw);
 252         if (ret) {
 253                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 254                 iwl_leds_exit(priv);
 255                 return ret;
 256         }
 257         priv->mac80211_registered = 1;
 258
 259         return 0;
 260 }
 261
 262 void iwlagn_mac_unregister(struct iwl_priv *priv)
 263 {
 264         if (!priv->mac80211_registered)
 265                 return;
 266         iwl_leds_exit(priv);
 267         ieee80211_unregister_hw(priv->hw);
 268         priv->mac80211_registered = 0;
 269 }
 270
 271 static int __iwl_up(struct iwl_priv *priv)
 272 {
 273         struct iwl_rxon_context *ctx;
 274         int ret;
 275
 276         lockdep_assert_held(&priv->mutex);
 277
 278         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 279                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 280                 return -EIO;
 281         }
 282
 283         for_each_context(priv, ctx) {
 284                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 285                 if (ret) {
 286                         iwl_dealloc_bcast_stations(priv);
 287                         return ret;
 288                 }
 289         }
 290
 291         ret = iwl_run_init_ucode(priv);
 292         if (ret) {
 293                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 294                 goto error;
 295         }
 296
 297         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 298         if (ret) {
 299                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 300                 goto error;
 301         }
 302
 303         ret = iwl_alive_start(priv);
 304         if (ret)
 305                 goto error;
 306         return 0;
 307
 308  error:
 309         set_bit(STATUS_EXIT_PENDING, &priv->status);
 310         iwl_down(priv);
 311         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 312
 313         IWL_ERR(priv, "Unable to initialize device.\n");
 314         return ret;
 315 }
 316
 317 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 318 {
 319         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 320         int ret;
 321
 322         IWL_DEBUG_MAC80211(priv, "enter\n");
 323
 324         /* we should be verifying the device is ready to be opened */
 325         mutex_lock(&priv->mutex);
 326         ret = __iwl_up(priv);
 327         mutex_unlock(&priv->mutex);
 328         if (ret)
 329                 return ret;
 330
 331         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 332
 333         /* Now we should be done, and the READY bit should be set. */
 334         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 335                 ret = -EIO;
 336
 337         iwlagn_led_enable(priv);
 338
 339         priv->is_open = 1;
 340         IWL_DEBUG_MAC80211(priv, "leave\n");
 341         return 0;
 342 }
 343
 344 void iwlagn_mac_stop(struct ieee80211_hw *hw)
 345 {
 346         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 347
 348         IWL_DEBUG_MAC80211(priv, "enter\n");
 349
 350         if (!priv->is_open)
 351                 return;
 352
 353         priv->is_open = 0;
 354
 355         mutex_lock(&priv->mutex);
 356         iwl_down(priv);
 357         mutex_unlock(&priv->mutex);
 358
 359         iwl_cancel_deferred_work(priv);
 360
 361         flush_workqueue(priv->workqueue);
 362
 363         /* User space software may expect getting rfkill changes
 364          * even if interface is down, trans->down will leave the RF
 365          * kill interrupt enabled
 366          */
 367         iwl_trans_stop_hw(priv->trans, false);
 368
 369         IWL_DEBUG_MAC80211(priv, "leave\n");
 370 }
 371
 372 void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 373                                struct ieee80211_vif *vif,
 374                                struct cfg80211_gtk_rekey_data *data)
 375 {
 376         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 377
 378         if (iwlwifi_mod_params.sw_crypto)
 379                 return;
 380
 381         IWL_DEBUG_MAC80211(priv, "enter\n");
 382         mutex_lock(&priv->mutex);
 383
 384         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 385                 goto out;
 386
 387         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 388         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 389         priv->replay_ctr =
 390                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 391         priv->have_rekey_data = true;
 392
 393  out:
 394         mutex_unlock(&priv->mutex);
 395         IWL_DEBUG_MAC80211(priv, "leave\n");
 396 }
 397
 398 #ifdef CONFIG_PM_SLEEP
 399
 400 int iwlagn_mac_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 401 {
 402         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 403         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 404         int ret;
 405
 406         if (WARN_ON(!wowlan))
 407                 return -EINVAL;
 408
 409         IWL_DEBUG_MAC80211(priv, "enter\n");
 410         mutex_lock(&priv->mutex);
 411
 412         /* Don't attempt WoWLAN when not associated, tear down instead. */
 413         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 414             !iwl_is_associated_ctx(ctx)) {
 415                 ret = 1;
 416                 goto out;
 417         }
 418
 419         ret = iwlagn_suspend(priv, wowlan);
 420         if (ret)
 421                 goto error;
 422
 423         device_set_wakeup_enable(priv->trans->dev, true);
 424
 425         iwl_trans_wowlan_suspend(priv->trans);
 426
 427         goto out;
 428
 429  error:
 430         priv->wowlan = false;
 431         iwlagn_prepare_restart(priv);
 432         ieee80211_restart_hw(priv->hw);
 433  out:
 434         mutex_unlock(&priv->mutex);
 435         IWL_DEBUG_MAC80211(priv, "leave\n");
 436
 437         return ret;
 438 }
 439
 440 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 441 {
 442         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 443         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 444         struct ieee80211_vif *vif;
 445         unsigned long flags;
 446         u32 base, status = 0xffffffff;
 447         int ret = -EIO;
 448
 449         IWL_DEBUG_MAC80211(priv, "enter\n");
 450         mutex_lock(&priv->mutex);
 451
 452         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 453                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 454
 455         base = priv->device_pointers.error_event_table;
 456         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 457                 spin_lock_irqsave(&priv->trans->reg_lock, flags);
 458                 ret = iwl_grab_nic_access_silent(priv->trans);
 459                 if (likely(ret == 0)) {
 460                         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
 461                         status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 462                         iwl_release_nic_access(priv->trans);
 463                 }
 464                 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
 465
 466 #ifdef CONFIG_IWLWIFI_DEBUGFS
 467                 if (ret == 0) {
 468                         const struct fw_img *img;
 469
 470                         img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 471                         if (!priv->wowlan_sram) {
 472                                 priv->wowlan_sram =
 473                                    kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 474                                                 GFP_KERNEL);
 475                         }
 476
 477                         if (priv->wowlan_sram)
 478                                 _iwl_read_targ_mem_words(
 479                                       priv->trans, 0x800000,
 480                                       priv->wowlan_sram,
 481                                       img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 482                 }
 483 #endif
 484         }
 485
 486         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 487         vif = ctx->vif;
 488
 489         priv->wowlan = false;
 490
 491         device_set_wakeup_enable(priv->trans->dev, false);
 492
 493         iwlagn_prepare_restart(priv);
 494
 495         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 496         iwl_connection_init_rx_config(priv, ctx);
 497         iwlagn_set_rxon_chain(priv, ctx);
 498
 499         mutex_unlock(&priv->mutex);
 500         IWL_DEBUG_MAC80211(priv, "leave\n");
 501
 502         ieee80211_resume_disconnect(vif);
 503
 504         return 1;
 505 }
 506
 507 #endif
 508
 509 void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 510 {
 511         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 512
 513         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 514                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 515
 516         if (iwlagn_tx_skb(priv, skb))
 517                 dev_kfree_skb_any(skb);
 518 }
 519
 520 void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 521                                 struct ieee80211_vif *vif,
 522                                 struct ieee80211_key_conf *keyconf,
 523                                 struct ieee80211_sta *sta,
 524                                 u32 iv32, u16 *phase1key)
 525 {
 526         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 527
 528         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 529 }
 530
 531 int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 532                        struct ieee80211_vif *vif,
 533                        struct ieee80211_sta *sta,
 534                        struct ieee80211_key_conf *key)
 535 {
 536         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 537         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 538         struct iwl_rxon_context *ctx = vif_priv->ctx;
 539         int ret;
 540         bool is_default_wep_key = false;
 541
 542         IWL_DEBUG_MAC80211(priv, "enter\n");
 543
 544         if (iwlwifi_mod_params.sw_crypto) {
 545                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 546                 return -EOPNOTSUPP;
 547         }
 548
 549         switch (key->cipher) {
 550         case WLAN_CIPHER_SUITE_TKIP:
 551                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 552                 /* fall through */
 553         case WLAN_CIPHER_SUITE_CCMP:
 554                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 555                 break;
 556         default:
 557                 break;
 558         }
 559
 560         /*
 561          * We could program these keys into the hardware as well, but we
 562          * don't expect much multicast traffic in IBSS and having keys
 563          * for more stations is probably more useful.
 564          *
 565          * Mark key TX-only and return 0.
 566          */
 567         if (vif->type == NL80211_IFTYPE_ADHOC &&
 568             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 569                 key->hw_key_idx = WEP_INVALID_OFFSET;
 570                 return 0;
 571         }
 572
 573         /* If they key was TX-only, accept deletion */
 574         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 575                 return 0;
 576
 577         mutex_lock(&priv->mutex);
 578         iwl_scan_cancel_timeout(priv, 100);
 579
 580         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 581
 582         /*
 583          * If we are getting WEP group key and we didn't receive any key mapping
 584          * so far, we are in legacy wep mode (group key only), otherwise we are
 585          * in 1X mode.
 586          * In legacy wep mode, we use another host command to the uCode.
 587          */
 588         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 589              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 590                 if (cmd == SET_KEY)
 591                         is_default_wep_key = !ctx->key_mapping_keys;
 592                 else
 593                         is_default_wep_key =
 594                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 595         }
 596
 597
 598         switch (cmd) {
 599         case SET_KEY:
 600                 if (is_default_wep_key) {
 601                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 602                         break;
 603                 }
 604                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 605                 if (ret) {
 606                         /*
 607                          * can't add key for RX, but we don't need it
 608                          * in the device for TX so still return 0
 609                          */
 610                         ret = 0;
 611                         key->hw_key_idx = WEP_INVALID_OFFSET;
 612                 }
 613
 614                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 615                 break;
 616         case DISABLE_KEY:
 617                 if (is_default_wep_key)
 618                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 619                 else
 620                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 621
 622                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 623                 break;
 624         default:
 625                 ret = -EINVAL;
 626         }
 627
 628         mutex_unlock(&priv->mutex);
 629         IWL_DEBUG_MAC80211(priv, "leave\n");
 630
 631         return ret;
 632 }
 633
 634 int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 635                             struct ieee80211_vif *vif,
 636                             enum ieee80211_ampdu_mlme_action action,
 637                             struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 638                             u8 buf_size)
 639 {
 640         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 641         int ret = -EINVAL;
 642         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 643
 644         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 645                      sta->addr, tid);
 646
 647         if (!(priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE))
 648                 return -EACCES;
 649
 650         IWL_DEBUG_MAC80211(priv, "enter\n");
 651         mutex_lock(&priv->mutex);
 652
 653         switch (action) {
 654         case IEEE80211_AMPDU_RX_START:
 655                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 656                         break;
 657                 IWL_DEBUG_HT(priv, "start Rx\n");
 658                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 659                 break;
 660         case IEEE80211_AMPDU_RX_STOP:
 661                 IWL_DEBUG_HT(priv, "stop Rx\n");
 662                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 663                 break;
 664         case IEEE80211_AMPDU_TX_START:
 665                 if (!priv->trans->ops->tx_agg_setup)
 666                         break;
 667                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 668                         break;
 669                 IWL_DEBUG_HT(priv, "start Tx\n");
 670                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 671                 break;
 672         case IEEE80211_AMPDU_TX_STOP:
 673                 IWL_DEBUG_HT(priv, "stop Tx\n");
 674                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 675                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 676                         priv->agg_tids_count--;
 677                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 678                                      priv->agg_tids_count);
 679                 }
 680                 if (!priv->agg_tids_count &&
 681                     priv->hw_params.use_rts_for_aggregation) {
 682                         /*
 683                          * switch off RTS/CTS if it was previously enabled
 684                          */
 685                         sta_priv->lq_sta.lq.general_params.flags &=
 686                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 687                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 688                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 689                 }
 690                 break;
 691         case IEEE80211_AMPDU_TX_OPERATIONAL:
 692                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 693                 break;
 694         }
 695         mutex_unlock(&priv->mutex);
 696         IWL_DEBUG_MAC80211(priv, "leave\n");
 697         return ret;
 698 }
 699
 700 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 701                               struct ieee80211_vif *vif,
 702                               struct ieee80211_sta *sta)
 703 {
 704         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 705         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 706         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 707         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 708         int ret;
 709         u8 sta_id;
 710
 711         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 712                         sta->addr);
 713         sta_priv->sta_id = IWL_INVALID_STATION;
 714
 715         atomic_set(&sta_priv->pending_frames, 0);
 716         if (vif->type == NL80211_IFTYPE_AP)
 717                 sta_priv->client = true;
 718
 719         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 720                                      is_ap, sta, &sta_id);
 721         if (ret) {
 722                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 723                         sta->addr, ret);
 724                 /* Should we return success if return code is EEXIST ? */
 725                 return ret;
 726         }
 727
 728         sta_priv->sta_id = sta_id;
 729
 730         return 0;
 731 }
 732
 733 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 734                                  struct ieee80211_vif *vif,
 735                                  struct ieee80211_sta *sta)
 736 {
 737         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 738         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 739         int ret;
 740
 741         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 742
 743         if (vif->type == NL80211_IFTYPE_STATION) {
 744                 /*
 745                  * Station will be removed from device when the RXON
 746                  * is set to unassociated -- just deactivate it here
 747                  * to avoid re-programming it.
 748                  */
 749                 ret = 0;
 750                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 751         } else {
 752                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 753                 if (ret)
 754                         IWL_DEBUG_QUIET_RFKILL(priv,
 755                                 "Error removing station %pM\n", sta->addr);
 756         }
 757         return ret;
 758 }
 759
 760 int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 761                          struct ieee80211_vif *vif,
 762                          struct ieee80211_sta *sta,
 763                          enum ieee80211_sta_state old_state,
 764                          enum ieee80211_sta_state new_state)
 765 {
 766         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 767         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 768         enum {
 769                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 770         } op = NONE;
 771         int ret;
 772
 773         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 774                            sta->addr, old_state, new_state);
 775
 776         mutex_lock(&priv->mutex);
 777         if (vif->type == NL80211_IFTYPE_STATION) {
 778                 if (old_state == IEEE80211_STA_NOTEXIST &&
 779                     new_state == IEEE80211_STA_NONE)
 780                         op = ADD;
 781                 else if (old_state == IEEE80211_STA_NONE &&
 782                          new_state == IEEE80211_STA_NOTEXIST)
 783                         op = REMOVE;
 784                 else if (old_state == IEEE80211_STA_AUTH &&
 785                          new_state == IEEE80211_STA_ASSOC)
 786                         op = HT_RATE_INIT;
 787         } else {
 788                 if (old_state == IEEE80211_STA_AUTH &&
 789                     new_state == IEEE80211_STA_ASSOC)
 790                         op = ADD_RATE_INIT;
 791                 else if (old_state == IEEE80211_STA_ASSOC &&
 792                          new_state == IEEE80211_STA_AUTH)
 793                         op = REMOVE;
 794         }
 795
 796         switch (op) {
 797         case ADD:
 798                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 799                 break;
 800         case REMOVE:
 801                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 802                 break;
 803         case ADD_RATE_INIT:
 804                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 805                 if (ret)
 806                         break;
 807                 /* Initialize rate scaling */
 808                 IWL_DEBUG_INFO(priv,
 809                                "Initializing rate scaling for station %pM\n",
 810                                sta->addr);
 811                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 812                 ret = 0;
 813                 break;
 814         case HT_RATE_INIT:
 815                 /* Initialize rate scaling */
 816                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 817                 if (ret)
 818                         break;
 819                 IWL_DEBUG_INFO(priv,
 820                                "Initializing rate scaling for station %pM\n",
 821                                sta->addr);
 822                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 823                 ret = 0;
 824                 break;
 825         default:
 826                 ret = 0;
 827                 break;
 828         }
 829
 830         /*
 831          * mac80211 might WARN if we fail, but due the way we
 832          * (badly) handle hard rfkill, we might fail here
 833          */
 834         if (iwl_is_rfkill(priv))
 835                 ret = 0;
 836
 837         mutex_unlock(&priv->mutex);
 838         IWL_DEBUG_MAC80211(priv, "leave\n");
 839
 840         return ret;
 841 }
 842
 843 void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 844                                struct ieee80211_channel_switch *ch_switch)
 845 {
 846         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 847         const struct iwl_channel_info *ch_info;
 848         struct ieee80211_conf *conf = &hw->conf;
 849         struct ieee80211_channel *channel = ch_switch->channel;
 850         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 851         /*
 852          * MULTI-FIXME
 853          * When we add support for multiple interfaces, we need to
 854          * revisit this. The channel switch command in the device
 855          * only affects the BSS context, but what does that really
 856          * mean? And what if we get a CSA on the second interface?
 857          * This needs a lot of work.
 858          */
 859         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 860         u16 ch;
 861
 862         IWL_DEBUG_MAC80211(priv, "enter\n");
 863
 864         mutex_lock(&priv->mutex);
 865
 866         if (iwl_is_rfkill(priv))
 867                 goto out;
 868
 869         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 870             test_bit(STATUS_SCANNING, &priv->status) ||
 871             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 872                 goto out;
 873
 874         if (!iwl_is_associated_ctx(ctx))
 875                 goto out;
 876
 877         if (!priv->lib->set_channel_switch)
 878                 goto out;
 879
 880         ch = channel->hw_value;
 881         if (le16_to_cpu(ctx->active.channel) == ch)
 882                 goto out;
 883
 884         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 885         if (!is_channel_valid(ch_info)) {
 886                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 887                 goto out;
 888         }
 889
 890         priv->current_ht_config.smps = conf->smps_mode;
 891
 892         /* Configure HT40 channels */
 893         ctx->ht.enabled = conf_is_ht(conf);
 894         if (ctx->ht.enabled)
 895                 iwlagn_config_ht40(conf, ctx);
 896         else
 897                 ctx->ht.is_40mhz = false;
 898
 899         if ((le16_to_cpu(ctx->staging.channel) != ch))
 900                 ctx->staging.flags = 0;
 901
 902         iwl_set_rxon_channel(priv, channel, ctx);
 903         iwl_set_rxon_ht(priv, ht_conf);
 904         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 905
 906         /*
 907          * at this point, staging_rxon has the
 908          * configuration for channel switch
 909          */
 910         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 911         priv->switch_channel = cpu_to_le16(ch);
 912         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 913                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 914                 priv->switch_channel = 0;
 915                 ieee80211_chswitch_done(ctx->vif, false);
 916         }
 917
 918 out:
 919         mutex_unlock(&priv->mutex);
 920         IWL_DEBUG_MAC80211(priv, "leave\n");
 921 }
 922
 923 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 924 {
 925         /*
 926          * MULTI-FIXME
 927          * See iwlagn_mac_channel_switch.
 928          */
 929         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 930
 931         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 932                 return;
 933
 934         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 935                 ieee80211_chswitch_done(ctx->vif, is_success);
 936 }
 937
 938 void iwlagn_configure_filter(struct ieee80211_hw *hw,
 939                              unsigned int changed_flags,
 940                              unsigned int *total_flags,
 941                              u64 multicast)
 942 {
 943         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 944         __le32 filter_or = 0, filter_nand = 0;
 945         struct iwl_rxon_context *ctx;
 946
 947 #define CHK(test, flag) do { \
 948         if (*total_flags & (test))              \
 949                 filter_or |= (flag);            \
 950         else                                    \
 951                 filter_nand |= (flag);          \
 952         } while (0)
 953
 954         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 955                         changed_flags, *total_flags);
 956
 957         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 958         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 959         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 960         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 961
 962 #undef CHK
 963
 964         mutex_lock(&priv->mutex);
 965
 966         for_each_context(priv, ctx) {
 967                 ctx->staging.filter_flags &= ~filter_nand;
 968                 ctx->staging.filter_flags |= filter_or;
 969
 970                 /*
 971                  * Not committing directly because hardware can perform a scan,
 972                  * but we'll eventually commit the filter flags change anyway.
 973                  */
 974         }
 975
 976         mutex_unlock(&priv->mutex);
 977
 978         /*
 979          * Receiving all multicast frames is always enabled by the
 980          * default flags setup in iwl_connection_init_rx_config()
 981          * since we currently do not support programming multicast
 982          * filters into the device.
 983          */
 984         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 985                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 986 }
 987
 988 void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 989 {
 990         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 991
 992         mutex_lock(&priv->mutex);
 993         IWL_DEBUG_MAC80211(priv, "enter\n");
 994
 995         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 996                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 997                 goto done;
 998         }
 999         if (iwl_is_rfkill(priv)) {
1000                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1001                 goto done;
1002         }
1003
1004         /*
1005          * mac80211 will not push any more frames for transmit
1006          * until the flush is completed
1007          */
1008         if (drop) {
1009                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1010                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1011                         IWL_ERR(priv, "flush request fail\n");
1012                         goto done;
1013                 }
1014         }
1015         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1016         iwl_trans_wait_tx_queue_empty(priv->trans);
1017 done:
1018         mutex_unlock(&priv->mutex);
1019         IWL_DEBUG_MAC80211(priv, "leave\n");
1020 }
1021
1022 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1023                                      struct ieee80211_channel *channel,
1024                                      enum nl80211_channel_type channel_type,
1025                                      int duration)
1026 {
1027         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1028         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1029         int err = 0;
1030
1031         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1032                 return -EOPNOTSUPP;
1033
1034         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1035                 return -EOPNOTSUPP;
1036
1037         IWL_DEBUG_MAC80211(priv, "enter\n");
1038         mutex_lock(&priv->mutex);
1039
1040         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1041                 err = -EBUSY;
1042                 goto out;
1043         }
1044
1045         priv->hw_roc_channel = channel;
1046         priv->hw_roc_chantype = channel_type;
1047         /* convert from ms to TU */
1048         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1049         priv->hw_roc_start_notified = false;
1050         cancel_delayed_work(&priv->hw_roc_disable_work);
1051
1052         if (!ctx->is_active) {
1053                 static const struct iwl_qos_info default_qos_data = {
1054                         .def_qos_parm = {
1055                                 .ac[0] = {
1056                                         .cw_min = cpu_to_le16(3),
1057                                         .cw_max = cpu_to_le16(7),
1058                                         .aifsn = 2,
1059                                         .edca_txop = cpu_to_le16(1504),
1060                                 },
1061                                 .ac[1] = {
1062                                         .cw_min = cpu_to_le16(7),
1063                                         .cw_max = cpu_to_le16(15),
1064                                         .aifsn = 2,
1065                                         .edca_txop = cpu_to_le16(3008),
1066                                 },
1067                                 .ac[2] = {
1068                                         .cw_min = cpu_to_le16(15),
1069                                         .cw_max = cpu_to_le16(1023),
1070                                         .aifsn = 3,
1071                                 },
1072                                 .ac[3] = {
1073                                         .cw_min = cpu_to_le16(15),
1074                                         .cw_max = cpu_to_le16(1023),
1075                                         .aifsn = 7,
1076                                 },
1077                         },
1078                 };
1079
1080                 ctx->is_active = true;
1081                 ctx->qos_data = default_qos_data;
1082                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1083                 memcpy(ctx->staging.node_addr,
1084                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1085                        ETH_ALEN);
1086                 memcpy(ctx->staging.bssid_addr,
1087                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1088                        ETH_ALEN);
1089                 err = iwlagn_commit_rxon(priv, ctx);
1090                 if (err)
1091                         goto out;
1092                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1093                                              RXON_FILTER_PROMISC_MSK |
1094                                              RXON_FILTER_CTL2HOST_MSK;
1095
1096                 err = iwlagn_commit_rxon(priv, ctx);
1097                 if (err) {
1098                         iwlagn_disable_roc(priv);
1099                         goto out;
1100                 }
1101                 priv->hw_roc_setup = true;
1102         }
1103
1104         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1105         if (err)
1106                 iwlagn_disable_roc(priv);
1107
1108  out:
1109         mutex_unlock(&priv->mutex);
1110         IWL_DEBUG_MAC80211(priv, "leave\n");
1111
1112         return err;
1113 }
1114
1115 int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1116 {
1117         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1118
1119         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1120                 return -EOPNOTSUPP;
1121
1122         IWL_DEBUG_MAC80211(priv, "enter\n");
1123         mutex_lock(&priv->mutex);
1124         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1125         iwlagn_disable_roc(priv);
1126         mutex_unlock(&priv->mutex);
1127         IWL_DEBUG_MAC80211(priv, "leave\n");
1128
1129         return 0;
1130 }
1131
1132 void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1133                               enum ieee80211_rssi_event rssi_event)
1134 {
1135         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1136
1137         IWL_DEBUG_MAC80211(priv, "enter\n");
1138         mutex_lock(&priv->mutex);
1139
1140         if (priv->cfg->bt_params &&
1141                         priv->cfg->bt_params->advanced_bt_coexist) {
1142                 if (rssi_event == RSSI_EVENT_LOW)
1143                         priv->bt_enable_pspoll = true;
1144                 else if (rssi_event == RSSI_EVENT_HIGH)
1145                         priv->bt_enable_pspoll = false;
1146
1147                 iwlagn_send_advance_bt_config(priv);
1148         } else {
1149                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1150                                 "ignoring RSSI callback\n");
1151         }
1152
1153         mutex_unlock(&priv->mutex);
1154         IWL_DEBUG_MAC80211(priv, "leave\n");
1155 }
1156
1157 int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1158                        struct ieee80211_sta *sta, bool set)
1159 {
1160         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1161
1162         queue_work(priv->workqueue, &priv->beacon_update);
1163
1164         return 0;
1165 }
1166
1167 int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1168                        struct ieee80211_vif *vif, u16 queue,
1169                        const struct ieee80211_tx_queue_params *params)
1170 {
1171         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1172         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1173         struct iwl_rxon_context *ctx = vif_priv->ctx;
1174         int q;
1175
1176         if (WARN_ON(!ctx))
1177                 return -EINVAL;
1178
1179         IWL_DEBUG_MAC80211(priv, "enter\n");
1180
1181         if (!iwl_is_ready_rf(priv)) {
1182                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1183                 return -EIO;
1184         }
1185
1186         if (queue >= AC_NUM) {
1187                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1188                 return 0;
1189         }
1190
1191         q = AC_NUM - 1 - queue;
1192
1193         mutex_lock(&priv->mutex);
1194
1195         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1196                 cpu_to_le16(params->cw_min);
1197         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1198                 cpu_to_le16(params->cw_max);
1199         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1200         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1201                         cpu_to_le16((params->txop * 32));
1202
1203         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1204
1205         mutex_unlock(&priv->mutex);
1206
1207         IWL_DEBUG_MAC80211(priv, "leave\n");
1208         return 0;
1209 }
1210
1211 int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1212 {
1213         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1214
1215         return priv->ibss_manager == IWL_IBSS_MANAGER;
1216 }
1217
1218 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1219 {
1220         iwl_connection_init_rx_config(priv, ctx);
1221
1222         iwlagn_set_rxon_chain(priv, ctx);
1223
1224         return iwlagn_commit_rxon(priv, ctx);
1225 }
1226
1227 int iwl_setup_interface(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1228 {
1229         struct ieee80211_vif *vif = ctx->vif;
1230         int err, ac;
1231
1232         lockdep_assert_held(&priv->mutex);
1233
1234         /*
1235          * This variable will be correct only when there's just
1236          * a single context, but all code using it is for hardware
1237          * that supports only one context.
1238          */
1239         priv->iw_mode = vif->type;
1240
1241         ctx->is_active = true;
1242
1243         err = iwl_set_mode(priv, ctx);
1244         if (err) {
1245                 if (!ctx->always_active)
1246                         ctx->is_active = false;
1247                 return err;
1248         }
1249
1250         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1251             vif->type == NL80211_IFTYPE_ADHOC) {
1252                 /*
1253                  * pretend to have high BT traffic as long as we
1254                  * are operating in IBSS mode, as this will cause
1255                  * the rate scaling etc. to behave as intended.
1256                  */
1257                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1258         }
1259
1260         /* set up queue mappings */
1261         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1262                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1263
1264         if (vif->type == NL80211_IFTYPE_AP)
1265                 vif->cab_queue = ctx->mcast_queue;
1266         else
1267                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1268
1269         return 0;
1270 }
1271
1272 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1273                                     struct ieee80211_vif *vif)
1274 {
1275         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1276         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1277         struct iwl_rxon_context *tmp, *ctx = NULL;
1278         int err;
1279         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1280         bool reset = false;
1281
1282         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1283                            viftype, vif->addr);
1284
1285         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1286
1287         mutex_lock(&priv->mutex);
1288
1289         iwlagn_disable_roc(priv);
1290
1291         if (!iwl_is_ready_rf(priv)) {
1292                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1293                 err = -EINVAL;
1294                 goto out;
1295         }
1296
1297         for_each_context(priv, tmp) {
1298                 u32 possible_modes =
1299                         tmp->interface_modes | tmp->exclusive_interface_modes;
1300
1301                 if (tmp->vif) {
1302                         /* On reset we need to add the same interface again */
1303                         if (tmp->vif == vif) {
1304                                 reset = true;
1305                                 ctx = tmp;
1306                                 break;
1307                         }
1308
1309                         /* check if this busy context is exclusive */
1310                         if (tmp->exclusive_interface_modes &
1311                                                 BIT(tmp->vif->type)) {
1312                                 err = -EINVAL;
1313                                 goto out;
1314                         }
1315                         continue;
1316                 }
1317
1318                 if (!(possible_modes & BIT(viftype)))
1319                         continue;
1320
1321                 /* have maybe usable context w/o interface */
1322                 ctx = tmp;
1323                 break;
1324         }
1325
1326         if (!ctx) {
1327                 err = -EOPNOTSUPP;
1328                 goto out;
1329         }
1330
1331         vif_priv->ctx = ctx;
1332         ctx->vif = vif;
1333
1334         err = iwl_setup_interface(priv, ctx);
1335         if (!err || reset)
1336                 goto out;
1337
1338         ctx->vif = NULL;
1339         priv->iw_mode = NL80211_IFTYPE_STATION;
1340  out:
1341         mutex_unlock(&priv->mutex);
1342
1343         IWL_DEBUG_MAC80211(priv, "leave\n");
1344         return err;
1345 }
1346
1347 void iwl_teardown_interface(struct iwl_priv *priv,
1348                             struct ieee80211_vif *vif,
1349                             bool mode_change)
1350 {
1351         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1352
1353         lockdep_assert_held(&priv->mutex);
1354
1355         if (priv->scan_vif == vif) {
1356                 iwl_scan_cancel_timeout(priv, 200);
1357                 iwl_force_scan_end(priv);
1358         }
1359
1360         if (!mode_change) {
1361                 iwl_set_mode(priv, ctx);
1362                 if (!ctx->always_active)
1363                         ctx->is_active = false;
1364         }
1365
1366         /*
1367          * When removing the IBSS interface, overwrite the
1368          * BT traffic load with the stored one from the last
1369          * notification, if any. If this is a device that
1370          * doesn't implement this, this has no effect since
1371          * both values are the same and zero.
1372          */
1373         if (vif->type == NL80211_IFTYPE_ADHOC)
1374                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1375 }
1376
1377 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1378                               struct ieee80211_vif *vif)
1379 {
1380         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1381         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1382
1383         IWL_DEBUG_MAC80211(priv, "enter\n");
1384
1385         mutex_lock(&priv->mutex);
1386
1387         if (WARN_ON(ctx->vif != vif)) {
1388                 struct iwl_rxon_context *tmp;
1389                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1390                 for_each_context(priv, tmp)
1391                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1392                                 tmp->ctxid, tmp, tmp->vif);
1393         }
1394         ctx->vif = NULL;
1395
1396         iwl_teardown_interface(priv, vif, false);
1397
1398         mutex_unlock(&priv->mutex);
1399
1400         IWL_DEBUG_MAC80211(priv, "leave\n");
1401
1402 }
1403
1404 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1405                                 struct ieee80211_vif *vif,
1406                                 enum nl80211_iftype newtype, bool newp2p)
1407 {
1408         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1409         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1410         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1411         struct iwl_rxon_context *tmp;
1412         enum nl80211_iftype newviftype = newtype;
1413         u32 interface_modes;
1414         int err;
1415
1416         IWL_DEBUG_MAC80211(priv, "enter\n");
1417
1418         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1419
1420         mutex_lock(&priv->mutex);
1421
1422         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1423                 /*
1424                  * Huh? But wait ... this can maybe happen when
1425                  * we're in the middle of a firmware restart!
1426                  */
1427                 err = -EBUSY;
1428                 goto out;
1429         }
1430
1431         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1432
1433         if (!(interface_modes & BIT(newtype))) {
1434                 err = -EBUSY;
1435                 goto out;
1436         }
1437
1438         /*
1439          * Refuse a change that should be done by moving from the PAN
1440          * context to the BSS context instead, if the BSS context is
1441          * available and can support the new interface type.
1442          */
1443         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1444             (bss_ctx->interface_modes & BIT(newtype) ||
1445              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1446                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1447                 err = -EBUSY;
1448                 goto out;
1449         }
1450
1451         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1452                 for_each_context(priv, tmp) {
1453                         if (ctx == tmp)
1454                                 continue;
1455
1456                         if (!tmp->vif)
1457                                 continue;
1458
1459                         /*
1460                          * The current mode switch would be exclusive, but
1461                          * another context is active ... refuse the switch.
1462                          */
1463                         err = -EBUSY;
1464                         goto out;
1465                 }
1466         }
1467
1468         /* success */
1469         iwl_teardown_interface(priv, vif, true);
1470         vif->type = newviftype;
1471         vif->p2p = newp2p;
1472         err = iwl_setup_interface(priv, ctx);
1473         WARN_ON(err);
1474         /*
1475          * We've switched internally, but submitting to the
1476          * device may have failed for some reason. Mask this
1477          * error, because otherwise mac80211 will not switch
1478          * (and set the interface type back) and we'll be
1479          * out of sync with it.
1480          */
1481         err = 0;
1482
1483  out:
1484         mutex_unlock(&priv->mutex);
1485         IWL_DEBUG_MAC80211(priv, "leave\n");
1486
1487         return err;
1488 }
1489
1490 int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1491                        struct ieee80211_vif *vif,
1492                        struct cfg80211_scan_request *req)
1493 {
1494         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1495         int ret;
1496
1497         IWL_DEBUG_MAC80211(priv, "enter\n");
1498
1499         if (req->n_channels == 0)
1500                 return -EINVAL;
1501
1502         mutex_lock(&priv->mutex);
1503
1504         /*
1505          * If an internal scan is in progress, just set
1506          * up the scan_request as per above.
1507          */
1508         if (priv->scan_type != IWL_SCAN_NORMAL) {
1509                 IWL_DEBUG_SCAN(priv,
1510                                "SCAN request during internal scan - defer\n");
1511                 priv->scan_request = req;
1512                 priv->scan_vif = vif;
1513                 ret = 0;
1514         } else {
1515                 priv->scan_request = req;
1516                 priv->scan_vif = vif;
1517                 /*
1518                  * mac80211 will only ask for one band at a time
1519                  * so using channels[0] here is ok
1520                  */
1521                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1522                                         req->channels[0]->band);
1523                 if (ret) {
1524                         priv->scan_request = NULL;
1525                         priv->scan_vif = NULL;
1526                 }
1527         }
1528
1529         IWL_DEBUG_MAC80211(priv, "leave\n");
1530
1531         mutex_unlock(&priv->mutex);
1532
1533         return ret;
1534 }
1535
1536 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1537 {
1538         struct iwl_addsta_cmd cmd = {
1539                 .mode = STA_CONTROL_MODIFY_MSK,
1540                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1541                 .sta.sta_id = sta_id,
1542         };
1543
1544         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1545 }
1546
1547 void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1548                            struct ieee80211_vif *vif,
1549                            enum sta_notify_cmd cmd,
1550                            struct ieee80211_sta *sta)
1551 {
1552         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1553         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1554         int sta_id;
1555
1556         IWL_DEBUG_MAC80211(priv, "enter\n");
1557
1558         switch (cmd) {
1559         case STA_NOTIFY_SLEEP:
1560                 WARN_ON(!sta_priv->client);
1561                 sta_priv->asleep = true;
1562                 if (atomic_read(&sta_priv->pending_frames) > 0)
1563                         ieee80211_sta_block_awake(hw, sta, true);
1564                 break;
1565         case STA_NOTIFY_AWAKE:
1566                 WARN_ON(!sta_priv->client);
1567                 if (!sta_priv->asleep)
1568                         break;
1569                 sta_priv->asleep = false;
1570                 sta_id = iwl_sta_id(sta);
1571                 if (sta_id != IWL_INVALID_STATION)
1572                         iwl_sta_modify_ps_wake(priv, sta_id);
1573                 break;
1574         default:
1575                 break;
1576         }
1577         IWL_DEBUG_MAC80211(priv, "leave\n");
1578 }
1579
1580 struct ieee80211_ops iwlagn_hw_ops = {
1581         .tx = iwlagn_mac_tx,
1582         .start = iwlagn_mac_start,
1583         .stop = iwlagn_mac_stop,
1584 #ifdef CONFIG_PM_SLEEP
1585         .suspend = iwlagn_mac_suspend,
1586         .resume = iwlagn_mac_resume,
1587 #endif
1588         .add_interface = iwlagn_mac_add_interface,
1589         .remove_interface = iwlagn_mac_remove_interface,
1590         .change_interface = iwlagn_mac_change_interface,
1591         .config = iwlagn_mac_config,
1592         .configure_filter = iwlagn_configure_filter,
1593         .set_key = iwlagn_mac_set_key,
1594         .update_tkip_key = iwlagn_mac_update_tkip_key,
1595         .set_rekey_data = iwlagn_mac_set_rekey_data,
1596         .conf_tx = iwlagn_mac_conf_tx,
1597         .bss_info_changed = iwlagn_bss_info_changed,
1598         .ampdu_action = iwlagn_mac_ampdu_action,
1599         .hw_scan = iwlagn_mac_hw_scan,
1600         .sta_notify = iwlagn_mac_sta_notify,
1601         .sta_state = iwlagn_mac_sta_state,
1602         .channel_switch = iwlagn_mac_channel_switch,
1603         .flush = iwlagn_mac_flush,
1604         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1605         .remain_on_channel = iwlagn_mac_remain_on_channel,
1606         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1607         .rssi_callback = iwlagn_mac_rssi_callback,
1608         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1609         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1610         .set_tim = iwlagn_mac_set_tim,
1611 };
1612
1613 /* This function both allocates and initializes hw and priv. */
1614 struct ieee80211_hw *iwl_alloc_all(void)
1615 {
1616         struct iwl_priv *priv;
1617         struct iwl_op_mode *op_mode;
1618         /* mac80211 allocates memory for this device instance, including
1619          *   space for this driver's private structure */
1620         struct ieee80211_hw *hw;
1621
1622         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1623                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1624         if (!hw)
1625                 goto out;
1626
1627         op_mode = hw->priv;
1628         priv = IWL_OP_MODE_GET_DVM(op_mode);
1629         priv->hw = hw;
1630
1631 out:
1632         return hw;
1633 }