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

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