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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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/firmware.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/if_arp.h>
  41
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-eeprom.h"
  47 #include "iwl-dev.h"
  48 #include "iwl-core.h"
  49 #include "iwl-io.h"
  50 #include "iwl-agn-calib.h"
  51 #include "iwl-agn.h"
  52 #include "iwl-shared.h"
  53 #include "iwl-bus.h"
  54 #include "iwl-trans.h"
  55
  56 /*****************************************************************************
  57  *
  58  * mac80211 entry point functions
  59  *
  60  *****************************************************************************/
  61
  62 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  63         {
  64                 .max = 1,
  65                 .types = BIT(NL80211_IFTYPE_STATION),
  66         },
  67         {
  68                 .max = 1,
  69                 .types = BIT(NL80211_IFTYPE_AP),
  70         },
  71 };
  72
  73 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  74         {
  75                 .max = 2,
  76                 .types = BIT(NL80211_IFTYPE_STATION),
  77         },
  78 };
  79
  80 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  81         {
  82                 .max = 1,
  83                 .types = BIT(NL80211_IFTYPE_STATION),
  84         },
  85         {
  86                 .max = 1,
  87                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  88                          BIT(NL80211_IFTYPE_AP),
  89         },
  90 };
  91
  92 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  93         {
  94                 .max = 2,
  95                 .types = BIT(NL80211_IFTYPE_STATION),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination
 104 iwlagn_iface_combinations_dualmode[] = {
 105         { .num_different_channels = 1,
 106           .max_interfaces = 2,
 107           .beacon_int_infra_match = true,
 108           .limits = iwlagn_sta_ap_limits,
 109           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 110         },
 111         { .num_different_channels = 1,
 112           .max_interfaces = 2,
 113           .limits = iwlagn_2sta_limits,
 114           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 115         },
 116 };
 117
 118 static const struct ieee80211_iface_combination
 119 iwlagn_iface_combinations_p2p[] = {
 120         { .num_different_channels = 1,
 121           .max_interfaces = 2,
 122           .beacon_int_infra_match = true,
 123           .limits = iwlagn_p2p_sta_go_limits,
 124           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 125         },
 126         { .num_different_channels = 1,
 127           .max_interfaces = 2,
 128           .limits = iwlagn_p2p_2sta_limits,
 129           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 130         },
 131 };
 132
 133 /*
 134  * Not a mac80211 entry point function, but it fits in with all the
 135  * other mac80211 functions grouped here.
 136  */
 137 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 138                                   struct iwlagn_ucode_capabilities *capa)
 139 {
 140         int ret;
 141         struct ieee80211_hw *hw = priv->hw;
 142         struct iwl_rxon_context *ctx;
 143
 144         hw->rate_control_algorithm = "iwl-agn-rs";
 145
 146         /* Tell mac80211 our characteristics */
 147         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 148                     IEEE80211_HW_AMPDU_AGGREGATION |
 149                     IEEE80211_HW_NEED_DTIM_PERIOD |
 150                     IEEE80211_HW_SPECTRUM_MGMT |
 151                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 152
 153         /*
 154          * Including the following line will crash some AP's.  This
 155          * workaround removes the stimulus which causes the crash until
 156          * the AP software can be fixed.
 157         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 158          */
 159
 160         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 161                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 162
 163         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 164                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 165                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 166
 167         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 168                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 169
 170         hw->sta_data_size = sizeof(struct iwl_station_priv);
 171         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 172
 173         for_each_context(priv, ctx) {
 174                 hw->wiphy->interface_modes |= ctx->interface_modes;
 175                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 176         }
 177
 178         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 179
 180         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 181                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 182                 hw->wiphy->n_iface_combinations =
 183                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 184         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 185                 hw->wiphy->iface_combinations =
 186                         iwlagn_iface_combinations_dualmode;
 187                 hw->wiphy->n_iface_combinations =
 188                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 189         }
 190
 191         hw->wiphy->max_remain_on_channel_duration = 1000;
 192
 193         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 194                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 195                             WIPHY_FLAG_IBSS_RSN;
 196
 197         if (trans(priv)->ucode_wowlan.code.len &&
 198             device_can_wakeup(bus(priv)->dev)) {
 199                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 200                                           WIPHY_WOWLAN_DISCONNECT |
 201                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 202                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 203                 if (!iwlagn_mod_params.sw_crypto)
 204                         hw->wiphy->wowlan.flags |=
 205                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 206                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 207
 208                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 209                 hw->wiphy->wowlan.pattern_min_len =
 210                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 211                 hw->wiphy->wowlan.pattern_max_len =
 212                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 213         }
 214
 215         if (iwlagn_mod_params.power_save)
 216                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 217         else
 218                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 219
 220         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 221         /* we create the 802.11 header and a zero-length SSID element */
 222         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 223
 224         /* Default value; 4 EDCA QOS priorities */
 225         hw->queues = 4;
 226
 227         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 228
 229         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 230                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 231                         &priv->bands[IEEE80211_BAND_2GHZ];
 232         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 233                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 234                         &priv->bands[IEEE80211_BAND_5GHZ];
 235
 236         iwl_leds_init(priv);
 237
 238         ret = ieee80211_register_hw(priv->hw);
 239         if (ret) {
 240                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 241                 return ret;
 242         }
 243         priv->mac80211_registered = 1;
 244
 245         return 0;
 246 }
 247
 248 static int __iwl_up(struct iwl_priv *priv)
 249 {
 250         struct iwl_rxon_context *ctx;
 251         int ret;
 252
 253         lockdep_assert_held(&priv->shrd->mutex);
 254
 255         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 256                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 257                 return -EIO;
 258         }
 259
 260         for_each_context(priv, ctx) {
 261                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 262                 if (ret) {
 263                         iwl_dealloc_bcast_stations(priv);
 264                         return ret;
 265                 }
 266         }
 267
 268         ret = iwlagn_run_init_ucode(priv);
 269         if (ret) {
 270                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 271                 goto error;
 272         }
 273
 274         ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 275         if (ret) {
 276                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 277                 goto error;
 278         }
 279
 280         ret = iwl_alive_start(priv);
 281         if (ret)
 282                 goto error;
 283         return 0;
 284
 285  error:
 286         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 287         __iwl_down(priv);
 288         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 289
 290         IWL_ERR(priv, "Unable to initialize device.\n");
 291         return ret;
 292 }
 293
 294 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 295 {
 296         struct iwl_priv *priv = hw->priv;
 297         int ret;
 298
 299         IWL_DEBUG_MAC80211(priv, "enter\n");
 300
 301         /* we should be verifying the device is ready to be opened */
 302         mutex_lock(&priv->shrd->mutex);
 303         ret = __iwl_up(priv);
 304         mutex_unlock(&priv->shrd->mutex);
 305         if (ret)
 306                 return ret;
 307
 308         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 309
 310         /* Now we should be done, and the READY bit should be set. */
 311         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 312                 ret = -EIO;
 313
 314         iwlagn_led_enable(priv);
 315
 316         priv->is_open = 1;
 317         IWL_DEBUG_MAC80211(priv, "leave\n");
 318         return 0;
 319 }
 320
 321 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 322 {
 323         struct iwl_priv *priv = hw->priv;
 324
 325         IWL_DEBUG_MAC80211(priv, "enter\n");
 326
 327         if (!priv->is_open)
 328                 return;
 329
 330         priv->is_open = 0;
 331
 332         iwl_down(priv);
 333
 334         flush_workqueue(priv->shrd->workqueue);
 335
 336         /* User space software may expect getting rfkill changes
 337          * even if interface is down */
 338         iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
 339         iwl_enable_rfkill_int(priv);
 340
 341         IWL_DEBUG_MAC80211(priv, "leave\n");
 342 }
 343
 344 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 345                                       struct ieee80211_vif *vif,
 346                                       struct cfg80211_gtk_rekey_data *data)
 347 {
 348         struct iwl_priv *priv = hw->priv;
 349
 350         if (iwlagn_mod_params.sw_crypto)
 351                 return;
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354         mutex_lock(&priv->shrd->mutex);
 355
 356         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 357                 goto out;
 358
 359         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 360         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 361         priv->replay_ctr =
 362                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 363         priv->have_rekey_data = true;
 364
 365  out:
 366         mutex_unlock(&priv->shrd->mutex);
 367         IWL_DEBUG_MAC80211(priv, "leave\n");
 368 }
 369
 370 #ifdef CONFIG_PM_SLEEP
 371
 372 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 373                               struct cfg80211_wowlan *wowlan)
 374 {
 375         struct iwl_priv *priv = hw->priv;
 376         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 377         int ret;
 378
 379         if (WARN_ON(!wowlan))
 380                 return -EINVAL;
 381
 382         IWL_DEBUG_MAC80211(priv, "enter\n");
 383         mutex_lock(&priv->shrd->mutex);
 384
 385         /* Don't attempt WoWLAN when not associated, tear down instead. */
 386         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 387             !iwl_is_associated_ctx(ctx)) {
 388                 ret = 1;
 389                 goto out;
 390         }
 391
 392         ret = iwlagn_suspend(priv, hw, wowlan);
 393         if (ret)
 394                 goto error;
 395
 396         device_set_wakeup_enable(bus(priv)->dev, true);
 397
 398         /* Now let the ucode operate on its own */
 399         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 400                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 401
 402         goto out;
 403
 404  error:
 405         priv->shrd->wowlan = false;
 406         iwlagn_prepare_restart(priv);
 407         ieee80211_restart_hw(priv->hw);
 408  out:
 409         mutex_unlock(&priv->shrd->mutex);
 410         IWL_DEBUG_MAC80211(priv, "leave\n");
 411
 412         return ret;
 413 }
 414
 415 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 416 {
 417         struct iwl_priv *priv = hw->priv;
 418         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 419         struct ieee80211_vif *vif;
 420         unsigned long flags;
 421         u32 base, status = 0xffffffff;
 422         int ret = -EIO;
 423
 424         IWL_DEBUG_MAC80211(priv, "enter\n");
 425         mutex_lock(&priv->shrd->mutex);
 426
 427         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 428                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 429
 430         base = priv->device_pointers.error_event_table;
 431         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 432                 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
 433                 ret = iwl_grab_nic_access_silent(bus(priv));
 434                 if (ret == 0) {
 435                         iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
 436                         status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
 437                         iwl_release_nic_access(bus(priv));
 438                 }
 439                 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
 440
 441 #ifdef CONFIG_IWLWIFI_DEBUGFS
 442                 if (ret == 0) {
 443                         struct iwl_trans *trans = trans(priv);
 444                         if (!priv->wowlan_sram)
 445                                 priv->wowlan_sram =
 446                                         kzalloc(trans->ucode_wowlan.data.len,
 447                                                 GFP_KERNEL);
 448
 449                         if (priv->wowlan_sram)
 450                                 _iwl_read_targ_mem_words(
 451                                         bus(priv), 0x800000, priv->wowlan_sram,
 452                                         trans->ucode_wowlan.data.len / 4);
 453                 }
 454 #endif
 455         }
 456
 457         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 458         vif = ctx->vif;
 459
 460         priv->shrd->wowlan = false;
 461
 462         device_set_wakeup_enable(bus(priv)->dev, false);
 463
 464         iwlagn_prepare_restart(priv);
 465
 466         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 467         iwl_connection_init_rx_config(priv, ctx);
 468         iwlagn_set_rxon_chain(priv, ctx);
 469
 470         mutex_unlock(&priv->shrd->mutex);
 471         IWL_DEBUG_MAC80211(priv, "leave\n");
 472
 473         ieee80211_resume_disconnect(vif);
 474
 475         return 1;
 476 }
 477
 478 #endif
 479
 480 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 481 {
 482         struct iwl_priv *priv = hw->priv;
 483
 484         IWL_DEBUG_MACDUMP(priv, "enter\n");
 485
 486         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 487                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 488
 489         if (iwlagn_tx_skb(priv, skb))
 490                 dev_kfree_skb_any(skb);
 491
 492         IWL_DEBUG_MACDUMP(priv, "leave\n");
 493 }
 494
 495 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 496                                        struct ieee80211_vif *vif,
 497                                        struct ieee80211_key_conf *keyconf,
 498                                        struct ieee80211_sta *sta,
 499                                        u32 iv32, u16 *phase1key)
 500 {
 501         struct iwl_priv *priv = hw->priv;
 502
 503         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 504 }
 505
 506 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 507                               struct ieee80211_vif *vif,
 508                               struct ieee80211_sta *sta,
 509                               struct ieee80211_key_conf *key)
 510 {
 511         struct iwl_priv *priv = hw->priv;
 512         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 513         struct iwl_rxon_context *ctx = vif_priv->ctx;
 514         int ret;
 515         bool is_default_wep_key = false;
 516
 517         IWL_DEBUG_MAC80211(priv, "enter\n");
 518
 519         if (iwlagn_mod_params.sw_crypto) {
 520                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 521                 return -EOPNOTSUPP;
 522         }
 523
 524         /*
 525          * We could program these keys into the hardware as well, but we
 526          * don't expect much multicast traffic in IBSS and having keys
 527          * for more stations is probably more useful.
 528          *
 529          * Mark key TX-only and return 0.
 530          */
 531         if (vif->type == NL80211_IFTYPE_ADHOC &&
 532             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 533                 key->hw_key_idx = WEP_INVALID_OFFSET;
 534                 return 0;
 535         }
 536
 537         /* If they key was TX-only, accept deletion */
 538         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 539                 return 0;
 540
 541         mutex_lock(&priv->shrd->mutex);
 542         iwl_scan_cancel_timeout(priv, 100);
 543
 544         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 545
 546         /*
 547          * If we are getting WEP group key and we didn't receive any key mapping
 548          * so far, we are in legacy wep mode (group key only), otherwise we are
 549          * in 1X mode.
 550          * In legacy wep mode, we use another host command to the uCode.
 551          */
 552         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 553              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 554                 if (cmd == SET_KEY)
 555                         is_default_wep_key = !ctx->key_mapping_keys;
 556                 else
 557                         is_default_wep_key =
 558                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 559         }
 560
 561
 562         switch (cmd) {
 563         case SET_KEY:
 564                 if (is_default_wep_key) {
 565                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 566                         break;
 567                 }
 568                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 569                 if (ret) {
 570                         /*
 571                          * can't add key for RX, but we don't need it
 572                          * in the device for TX so still return 0
 573                          */
 574                         ret = 0;
 575                         key->hw_key_idx = WEP_INVALID_OFFSET;
 576                 }
 577
 578                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 579                 break;
 580         case DISABLE_KEY:
 581                 if (is_default_wep_key)
 582                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 583                 else
 584                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 585
 586                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 587                 break;
 588         default:
 589                 ret = -EINVAL;
 590         }
 591
 592         mutex_unlock(&priv->shrd->mutex);
 593         IWL_DEBUG_MAC80211(priv, "leave\n");
 594
 595         return ret;
 596 }
 597
 598 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 599                                    struct ieee80211_vif *vif,
 600                                    enum ieee80211_ampdu_mlme_action action,
 601                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 602                                    u8 buf_size)
 603 {
 604         struct iwl_priv *priv = hw->priv;
 605         int ret = -EINVAL;
 606         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 607         struct iwl_rxon_context *ctx =  iwl_rxon_ctx_from_vif(vif);
 608
 609         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 610                      sta->addr, tid);
 611
 612         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
 613                 return -EACCES;
 614
 615         IWL_DEBUG_MAC80211(priv, "enter\n");
 616         mutex_lock(&priv->shrd->mutex);
 617
 618         switch (action) {
 619         case IEEE80211_AMPDU_RX_START:
 620                 IWL_DEBUG_HT(priv, "start Rx\n");
 621                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 622                 break;
 623         case IEEE80211_AMPDU_RX_STOP:
 624                 IWL_DEBUG_HT(priv, "stop Rx\n");
 625                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 626                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 627                         ret = 0;
 628                 break;
 629         case IEEE80211_AMPDU_TX_START:
 630                 IWL_DEBUG_HT(priv, "start Tx\n");
 631                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 632                 break;
 633         case IEEE80211_AMPDU_TX_STOP:
 634                 IWL_DEBUG_HT(priv, "stop Tx\n");
 635                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 636                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 637                         priv->agg_tids_count--;
 638                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 639                                      priv->agg_tids_count);
 640                 }
 641                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 642                         ret = 0;
 643                 if (!priv->agg_tids_count && priv->cfg->ht_params &&
 644                     priv->cfg->ht_params->use_rts_for_aggregation) {
 645                         /*
 646                          * switch off RTS/CTS if it was previously enabled
 647                          */
 648                         sta_priv->lq_sta.lq.general_params.flags &=
 649                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 650                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 651                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 652                 }
 653                 break;
 654         case IEEE80211_AMPDU_TX_OPERATIONAL:
 655                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 656
 657                 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, iwl_sta_id(sta),
 658                                 tid, buf_size);
 659
 660                 /*
 661                  * If the limit is 0, then it wasn't initialised yet,
 662                  * use the default. We can do that since we take the
 663                  * minimum below, and we don't want to go above our
 664                  * default due to hardware restrictions.
 665                  */
 666                 if (sta_priv->max_agg_bufsize == 0)
 667                         sta_priv->max_agg_bufsize =
 668                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 669
 670                 /*
 671                  * Even though in theory the peer could have different
 672                  * aggregation reorder buffer sizes for different sessions,
 673                  * our ucode doesn't allow for that and has a global limit
 674                  * for each station. Therefore, use the minimum of all the
 675                  * aggregation sessions and our default value.
 676                  */
 677                 sta_priv->max_agg_bufsize =
 678                         min(sta_priv->max_agg_bufsize, buf_size);
 679
 680                 if (priv->cfg->ht_params &&
 681                     priv->cfg->ht_params->use_rts_for_aggregation) {
 682                         /*
 683                          * switch to RTS/CTS if it is the prefer protection
 684                          * method for HT traffic
 685                          */
 686
 687                         sta_priv->lq_sta.lq.general_params.flags |=
 688                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 689                 }
 690                 priv->agg_tids_count++;
 691                 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 692                              priv->agg_tids_count);
 693
 694                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
 695                         sta_priv->max_agg_bufsize;
 696
 697                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 698                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 699
 700                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
 701                          sta->addr, tid);
 702                 ret = 0;
 703                 break;
 704         }
 705         mutex_unlock(&priv->shrd->mutex);
 706         IWL_DEBUG_MAC80211(priv, "leave\n");
 707         return ret;
 708 }
 709
 710 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 711                               struct ieee80211_vif *vif,
 712                               struct ieee80211_sta *sta)
 713 {
 714         struct iwl_priv *priv = hw->priv;
 715         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 716         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 717         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 718         int ret = 0;
 719         u8 sta_id;
 720
 721         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
 722                         sta->addr);
 723         mutex_lock(&priv->shrd->mutex);
 724         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 725                         sta->addr);
 726         sta_priv->sta_id = IWL_INVALID_STATION;
 727
 728         atomic_set(&sta_priv->pending_frames, 0);
 729         if (vif->type == NL80211_IFTYPE_AP)
 730                 sta_priv->client = true;
 731
 732         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 733                                      is_ap, sta, &sta_id);
 734         if (ret) {
 735                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 736                         sta->addr, ret);
 737                 /* Should we return success if return code is EEXIST ? */
 738                 goto out;
 739         }
 740
 741         sta_priv->sta_id = sta_id;
 742
 743         /* Initialize rate scaling */
 744         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
 745                        sta->addr);
 746         iwl_rs_rate_init(priv, sta, sta_id);
 747  out:
 748         mutex_unlock(&priv->shrd->mutex);
 749         IWL_DEBUG_MAC80211(priv, "leave\n");
 750
 751         return ret;
 752 }
 753
 754 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 755                                 struct ieee80211_channel_switch *ch_switch)
 756 {
 757         struct iwl_priv *priv = hw->priv;
 758         const struct iwl_channel_info *ch_info;
 759         struct ieee80211_conf *conf = &hw->conf;
 760         struct ieee80211_channel *channel = ch_switch->channel;
 761         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 762         /*
 763          * MULTI-FIXME
 764          * When we add support for multiple interfaces, we need to
 765          * revisit this. The channel switch command in the device
 766          * only affects the BSS context, but what does that really
 767          * mean? And what if we get a CSA on the second interface?
 768          * This needs a lot of work.
 769          */
 770         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 771         u16 ch;
 772
 773         IWL_DEBUG_MAC80211(priv, "enter\n");
 774
 775         mutex_lock(&priv->shrd->mutex);
 776
 777         if (iwl_is_rfkill(priv->shrd))
 778                 goto out;
 779
 780         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 781             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 782             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
 783                 goto out;
 784
 785         if (!iwl_is_associated_ctx(ctx))
 786                 goto out;
 787
 788         if (!priv->cfg->lib->set_channel_switch)
 789                 goto out;
 790
 791         ch = channel->hw_value;
 792         if (le16_to_cpu(ctx->active.channel) == ch)
 793                 goto out;
 794
 795         ch_info = iwl_get_channel_info(priv, channel->band, ch);
 796         if (!is_channel_valid(ch_info)) {
 797                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
 798                 goto out;
 799         }
 800
 801         spin_lock_irq(&priv->shrd->lock);
 802
 803         priv->current_ht_config.smps = conf->smps_mode;
 804
 805         /* Configure HT40 channels */
 806         ctx->ht.enabled = conf_is_ht(conf);
 807         if (ctx->ht.enabled) {
 808                 if (conf_is_ht40_minus(conf)) {
 809                         ctx->ht.extension_chan_offset =
 810                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 811                         ctx->ht.is_40mhz = true;
 812                 } else if (conf_is_ht40_plus(conf)) {
 813                         ctx->ht.extension_chan_offset =
 814                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 815                         ctx->ht.is_40mhz = true;
 816                 } else {
 817                         ctx->ht.extension_chan_offset =
 818                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
 819                         ctx->ht.is_40mhz = false;
 820                 }
 821         } else
 822                 ctx->ht.is_40mhz = false;
 823
 824         if ((le16_to_cpu(ctx->staging.channel) != ch))
 825                 ctx->staging.flags = 0;
 826
 827         iwl_set_rxon_channel(priv, channel, ctx);
 828         iwl_set_rxon_ht(priv, ht_conf);
 829         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 830
 831         spin_unlock_irq(&priv->shrd->lock);
 832
 833         iwl_set_rate(priv);
 834         /*
 835          * at this point, staging_rxon has the
 836          * configuration for channel switch
 837          */
 838         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 839         priv->switch_channel = cpu_to_le16(ch);
 840         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
 841                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 842                 priv->switch_channel = 0;
 843                 ieee80211_chswitch_done(ctx->vif, false);
 844         }
 845
 846 out:
 847         mutex_unlock(&priv->shrd->mutex);
 848         IWL_DEBUG_MAC80211(priv, "leave\n");
 849 }
 850
 851 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 852                                     unsigned int changed_flags,
 853                                     unsigned int *total_flags,
 854                                     u64 multicast)
 855 {
 856         struct iwl_priv *priv = hw->priv;
 857         __le32 filter_or = 0, filter_nand = 0;
 858         struct iwl_rxon_context *ctx;
 859
 860 #define CHK(test, flag) do { \
 861         if (*total_flags & (test))              \
 862                 filter_or |= (flag);            \
 863         else                                    \
 864                 filter_nand |= (flag);          \
 865         } while (0)
 866
 867         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 868                         changed_flags, *total_flags);
 869
 870         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 871         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 872         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 873         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 874
 875 #undef CHK
 876
 877         mutex_lock(&priv->shrd->mutex);
 878
 879         for_each_context(priv, ctx) {
 880                 ctx->staging.filter_flags &= ~filter_nand;
 881                 ctx->staging.filter_flags |= filter_or;
 882
 883                 /*
 884                  * Not committing directly because hardware can perform a scan,
 885                  * but we'll eventually commit the filter flags change anyway.
 886                  */
 887         }
 888
 889         mutex_unlock(&priv->shrd->mutex);
 890
 891         /*
 892          * Receiving all multicast frames is always enabled by the
 893          * default flags setup in iwl_connection_init_rx_config()
 894          * since we currently do not support programming multicast
 895          * filters into the device.
 896          */
 897         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 898                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 899 }
 900
 901 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 902 {
 903         struct iwl_priv *priv = hw->priv;
 904
 905         mutex_lock(&priv->shrd->mutex);
 906         IWL_DEBUG_MAC80211(priv, "enter\n");
 907
 908         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 909                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 910                 goto done;
 911         }
 912         if (iwl_is_rfkill(priv->shrd)) {
 913                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 914                 goto done;
 915         }
 916
 917         /*
 918          * mac80211 will not push any more frames for transmit
 919          * until the flush is completed
 920          */
 921         if (drop) {
 922                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 923                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 924                         IWL_ERR(priv, "flush request fail\n");
 925                         goto done;
 926                 }
 927         }
 928         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 929         iwl_trans_wait_tx_queue_empty(trans(priv));
 930 done:
 931         mutex_unlock(&priv->shrd->mutex);
 932         IWL_DEBUG_MAC80211(priv, "leave\n");
 933 }
 934
 935 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 936                                      struct ieee80211_channel *channel,
 937                                      enum nl80211_channel_type channel_type,
 938                                      int duration)
 939 {
 940         struct iwl_priv *priv = hw->priv;
 941         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 942         int err = 0;
 943
 944         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 945                 return -EOPNOTSUPP;
 946
 947         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 948                 return -EOPNOTSUPP;
 949
 950         IWL_DEBUG_MAC80211(priv, "enter\n");
 951         mutex_lock(&priv->shrd->mutex);
 952
 953         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 954                 err = -EBUSY;
 955                 goto out;
 956         }
 957
 958         priv->hw_roc_channel = channel;
 959         priv->hw_roc_chantype = channel_type;
 960         priv->hw_roc_duration = duration;
 961         priv->hw_roc_start_notified = false;
 962         cancel_delayed_work(&priv->hw_roc_disable_work);
 963
 964         if (!ctx->is_active) {
 965                 static const struct iwl_qos_info default_qos_data = {
 966                         .def_qos_parm = {
 967                                 .ac[0] = {
 968                                         .cw_min = cpu_to_le16(3),
 969                                         .cw_max = cpu_to_le16(7),
 970                                         .aifsn = 2,
 971                                         .edca_txop = cpu_to_le16(1504),
 972                                 },
 973                                 .ac[1] = {
 974                                         .cw_min = cpu_to_le16(7),
 975                                         .cw_max = cpu_to_le16(15),
 976                                         .aifsn = 2,
 977                                         .edca_txop = cpu_to_le16(3008),
 978                                 },
 979                                 .ac[2] = {
 980                                         .cw_min = cpu_to_le16(15),
 981                                         .cw_max = cpu_to_le16(1023),
 982                                         .aifsn = 3,
 983                                 },
 984                                 .ac[3] = {
 985                                         .cw_min = cpu_to_le16(15),
 986                                         .cw_max = cpu_to_le16(1023),
 987                                         .aifsn = 7,
 988                                 },
 989                         },
 990                 };
 991
 992                 ctx->is_active = true;
 993                 ctx->qos_data = default_qos_data;
 994                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 995                 memcpy(ctx->staging.node_addr,
 996                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 997                        ETH_ALEN);
 998                 memcpy(ctx->staging.bssid_addr,
 999                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1000                        ETH_ALEN);
1001                 err = iwlagn_commit_rxon(priv, ctx);
1002                 if (err)
1003                         goto out;
1004                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1005                                              RXON_FILTER_PROMISC_MSK |
1006                                              RXON_FILTER_CTL2HOST_MSK;
1007
1008                 err = iwlagn_commit_rxon(priv, ctx);
1009                 if (err) {
1010                         iwlagn_disable_roc(priv);
1011                         goto out;
1012                 }
1013                 priv->hw_roc_setup = true;
1014         }
1015
1016         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1017         if (err)
1018                 iwlagn_disable_roc(priv);
1019
1020  out:
1021         mutex_unlock(&priv->shrd->mutex);
1022         IWL_DEBUG_MAC80211(priv, "leave\n");
1023
1024         return err;
1025 }
1026
1027 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1028 {
1029         struct iwl_priv *priv = hw->priv;
1030
1031         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1032                 return -EOPNOTSUPP;
1033
1034         IWL_DEBUG_MAC80211(priv, "enter\n");
1035         mutex_lock(&priv->shrd->mutex);
1036         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1037         iwlagn_disable_roc(priv);
1038         mutex_unlock(&priv->shrd->mutex);
1039         IWL_DEBUG_MAC80211(priv, "leave\n");
1040
1041         return 0;
1042 }
1043
1044 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1045                               struct ieee80211_vif *vif,
1046                               const u8 *bssid,
1047                               enum ieee80211_tx_sync_type type)
1048 {
1049         struct iwl_priv *priv = hw->priv;
1050         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1051         struct iwl_rxon_context *ctx = vif_priv->ctx;
1052         int ret;
1053         u8 sta_id;
1054
1055         IWL_DEBUG_MAC80211(priv, "enter\n");
1056         mutex_lock(&priv->shrd->mutex);
1057
1058         if (iwl_is_associated_ctx(ctx)) {
1059                 ret = 0;
1060                 goto out;
1061         }
1062
1063         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1064             &priv->shrd->status)) {
1065                 ret = -EBUSY;
1066                 goto out;
1067         }
1068
1069         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1070         if (ret)
1071                 goto out;
1072
1073         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1074                 ret = -EIO;
1075                 goto out_remove_sta;
1076         }
1077
1078         memcpy(ctx->bssid, bssid, ETH_ALEN);
1079         ctx->preauth_bssid = true;
1080
1081         ret = iwlagn_commit_rxon(priv, ctx);
1082
1083         if (ret == 0)
1084                 goto out;
1085
1086  out_remove_sta:
1087         iwl_remove_station(priv, sta_id, bssid);
1088  out:
1089         mutex_unlock(&priv->shrd->mutex);
1090         IWL_DEBUG_MAC80211(priv, "leave\n");
1091
1092         return ret;
1093 }
1094
1095 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1096                                    struct ieee80211_vif *vif,
1097                                    const u8 *bssid,
1098                                    enum ieee80211_tx_sync_type type)
1099 {
1100         struct iwl_priv *priv = hw->priv;
1101         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1102         struct iwl_rxon_context *ctx = vif_priv->ctx;
1103
1104         IWL_DEBUG_MAC80211(priv, "enter\n");
1105         mutex_lock(&priv->shrd->mutex);
1106
1107         if (iwl_is_associated_ctx(ctx))
1108                 goto out;
1109
1110         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1111         ctx->preauth_bssid = false;
1112         /* no need to commit */
1113  out:
1114         mutex_unlock(&priv->shrd->mutex);
1115         IWL_DEBUG_MAC80211(priv, "leave\n");
1116 }
1117
1118 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1119                            enum ieee80211_rssi_event rssi_event)
1120 {
1121         struct iwl_priv *priv = hw->priv;
1122
1123         IWL_DEBUG_MAC80211(priv, "enter\n");
1124         mutex_lock(&priv->shrd->mutex);
1125
1126         if (priv->cfg->bt_params &&
1127                         priv->cfg->bt_params->advanced_bt_coexist) {
1128                 if (rssi_event == RSSI_EVENT_LOW)
1129                         priv->bt_enable_pspoll = true;
1130                 else if (rssi_event == RSSI_EVENT_HIGH)
1131                         priv->bt_enable_pspoll = false;
1132
1133                 iwlagn_send_advance_bt_config(priv);
1134         } else {
1135                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1136                                 "ignoring RSSI callback\n");
1137         }
1138
1139         mutex_unlock(&priv->shrd->mutex);
1140         IWL_DEBUG_MAC80211(priv, "leave\n");
1141 }
1142
1143 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1144                            struct ieee80211_sta *sta, bool set)
1145 {
1146         struct iwl_priv *priv = hw->priv;
1147
1148         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1149
1150         return 0;
1151 }
1152
1153 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1154                     struct ieee80211_vif *vif, u16 queue,
1155                     const struct ieee80211_tx_queue_params *params)
1156 {
1157         struct iwl_priv *priv = hw->priv;
1158         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1159         struct iwl_rxon_context *ctx = vif_priv->ctx;
1160         unsigned long flags;
1161         int q;
1162
1163         if (WARN_ON(!ctx))
1164                 return -EINVAL;
1165
1166         IWL_DEBUG_MAC80211(priv, "enter\n");
1167
1168         if (!iwl_is_ready_rf(priv->shrd)) {
1169                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1170                 return -EIO;
1171         }
1172
1173         if (queue >= AC_NUM) {
1174                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1175                 return 0;
1176         }
1177
1178         q = AC_NUM - 1 - queue;
1179
1180         spin_lock_irqsave(&priv->shrd->lock, flags);
1181
1182         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1183                 cpu_to_le16(params->cw_min);
1184         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1185                 cpu_to_le16(params->cw_max);
1186         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1187         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1188                         cpu_to_le16((params->txop * 32));
1189
1190         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1191
1192         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1193
1194         IWL_DEBUG_MAC80211(priv, "leave\n");
1195         return 0;
1196 }
1197
1198 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1199 {
1200         struct iwl_priv *priv = hw->priv;
1201
1202         return priv->ibss_manager == IWL_IBSS_MANAGER;
1203 }
1204
1205 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1206 {
1207         iwl_connection_init_rx_config(priv, ctx);
1208
1209         iwlagn_set_rxon_chain(priv, ctx);
1210
1211         return iwlagn_commit_rxon(priv, ctx);
1212 }
1213
1214 static int iwl_setup_interface(struct iwl_priv *priv,
1215                                struct iwl_rxon_context *ctx)
1216 {
1217         struct ieee80211_vif *vif = ctx->vif;
1218         int err;
1219
1220         lockdep_assert_held(&priv->shrd->mutex);
1221
1222         /*
1223          * This variable will be correct only when there's just
1224          * a single context, but all code using it is for hardware
1225          * that supports only one context.
1226          */
1227         priv->iw_mode = vif->type;
1228
1229         ctx->is_active = true;
1230
1231         err = iwl_set_mode(priv, ctx);
1232         if (err) {
1233                 if (!ctx->always_active)
1234                         ctx->is_active = false;
1235                 return err;
1236         }
1237
1238         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1239             vif->type == NL80211_IFTYPE_ADHOC) {
1240                 /*
1241                  * pretend to have high BT traffic as long as we
1242                  * are operating in IBSS mode, as this will cause
1243                  * the rate scaling etc. to behave as intended.
1244                  */
1245                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1246         }
1247
1248         return 0;
1249 }
1250
1251 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1252                              struct ieee80211_vif *vif)
1253 {
1254         struct iwl_priv *priv = hw->priv;
1255         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1256         struct iwl_rxon_context *tmp, *ctx = NULL;
1257         int err;
1258         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1259
1260         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1261                            viftype, vif->addr);
1262
1263         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1264
1265         mutex_lock(&priv->shrd->mutex);
1266
1267         iwlagn_disable_roc(priv);
1268
1269         if (!iwl_is_ready_rf(priv->shrd)) {
1270                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1271                 err = -EINVAL;
1272                 goto out;
1273         }
1274
1275         for_each_context(priv, tmp) {
1276                 u32 possible_modes =
1277                         tmp->interface_modes | tmp->exclusive_interface_modes;
1278
1279                 if (tmp->vif) {
1280                         /* check if this busy context is exclusive */
1281                         if (tmp->exclusive_interface_modes &
1282                                                 BIT(tmp->vif->type)) {
1283                                 err = -EINVAL;
1284                                 goto out;
1285                         }
1286                         continue;
1287                 }
1288
1289                 if (!(possible_modes & BIT(viftype)))
1290                         continue;
1291
1292                 /* have maybe usable context w/o interface */
1293                 ctx = tmp;
1294                 break;
1295         }
1296
1297         if (!ctx) {
1298                 err = -EOPNOTSUPP;
1299                 goto out;
1300         }
1301
1302         vif_priv->ctx = ctx;
1303         ctx->vif = vif;
1304
1305         err = iwl_setup_interface(priv, ctx);
1306         if (!err)
1307                 goto out;
1308
1309         ctx->vif = NULL;
1310         priv->iw_mode = NL80211_IFTYPE_STATION;
1311  out:
1312         mutex_unlock(&priv->shrd->mutex);
1313
1314         IWL_DEBUG_MAC80211(priv, "leave\n");
1315         return err;
1316 }
1317
1318 static void iwl_teardown_interface(struct iwl_priv *priv,
1319                                    struct ieee80211_vif *vif,
1320                                    bool mode_change)
1321 {
1322         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1323
1324         lockdep_assert_held(&priv->shrd->mutex);
1325
1326         if (priv->scan_vif == vif) {
1327                 iwl_scan_cancel_timeout(priv, 200);
1328                 iwl_force_scan_end(priv);
1329         }
1330
1331         if (!mode_change) {
1332                 iwl_set_mode(priv, ctx);
1333                 if (!ctx->always_active)
1334                         ctx->is_active = false;
1335         }
1336
1337         /*
1338          * When removing the IBSS interface, overwrite the
1339          * BT traffic load with the stored one from the last
1340          * notification, if any. If this is a device that
1341          * doesn't implement this, this has no effect since
1342          * both values are the same and zero.
1343          */
1344         if (vif->type == NL80211_IFTYPE_ADHOC)
1345                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1346 }
1347
1348 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1349                               struct ieee80211_vif *vif)
1350 {
1351         struct iwl_priv *priv = hw->priv;
1352         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1353
1354         IWL_DEBUG_MAC80211(priv, "enter\n");
1355
1356         mutex_lock(&priv->shrd->mutex);
1357
1358         if (WARN_ON(ctx->vif != vif)) {
1359                 struct iwl_rxon_context *tmp;
1360                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1361                 for_each_context(priv, tmp)
1362                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1363                                 tmp->ctxid, tmp, tmp->vif);
1364         }
1365         ctx->vif = NULL;
1366
1367         iwl_teardown_interface(priv, vif, false);
1368
1369         mutex_unlock(&priv->shrd->mutex);
1370
1371         IWL_DEBUG_MAC80211(priv, "leave\n");
1372
1373 }
1374
1375 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1376                                 struct ieee80211_vif *vif,
1377                                 enum nl80211_iftype newtype, bool newp2p)
1378 {
1379         struct iwl_priv *priv = hw->priv;
1380         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1381         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1382         struct iwl_rxon_context *tmp;
1383         enum nl80211_iftype newviftype = newtype;
1384         u32 interface_modes;
1385         int err;
1386
1387         IWL_DEBUG_MAC80211(priv, "enter\n");
1388
1389         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1390
1391         mutex_lock(&priv->shrd->mutex);
1392
1393         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1394                 /*
1395                  * Huh? But wait ... this can maybe happen when
1396                  * we're in the middle of a firmware restart!
1397                  */
1398                 err = -EBUSY;
1399                 goto out;
1400         }
1401
1402         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1403
1404         if (!(interface_modes & BIT(newtype))) {
1405                 err = -EBUSY;
1406                 goto out;
1407         }
1408
1409         /*
1410          * Refuse a change that should be done by moving from the PAN
1411          * context to the BSS context instead, if the BSS context is
1412          * available and can support the new interface type.
1413          */
1414         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1415             (bss_ctx->interface_modes & BIT(newtype) ||
1416              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1417                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1418                 err = -EBUSY;
1419                 goto out;
1420         }
1421
1422         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1423                 for_each_context(priv, tmp) {
1424                         if (ctx == tmp)
1425                                 continue;
1426
1427                         if (!tmp->vif)
1428                                 continue;
1429
1430                         /*
1431                          * The current mode switch would be exclusive, but
1432                          * another context is active ... refuse the switch.
1433                          */
1434                         err = -EBUSY;
1435                         goto out;
1436                 }
1437         }
1438
1439         /* success */
1440         iwl_teardown_interface(priv, vif, true);
1441         vif->type = newviftype;
1442         vif->p2p = newp2p;
1443         err = iwl_setup_interface(priv, ctx);
1444         WARN_ON(err);
1445         /*
1446          * We've switched internally, but submitting to the
1447          * device may have failed for some reason. Mask this
1448          * error, because otherwise mac80211 will not switch
1449          * (and set the interface type back) and we'll be
1450          * out of sync with it.
1451          */
1452         err = 0;
1453
1454  out:
1455         mutex_unlock(&priv->shrd->mutex);
1456         IWL_DEBUG_MAC80211(priv, "leave\n");
1457
1458         return err;
1459 }
1460
1461 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1462                     struct ieee80211_vif *vif,
1463                     struct cfg80211_scan_request *req)
1464 {
1465         struct iwl_priv *priv = hw->priv;
1466         int ret;
1467
1468         IWL_DEBUG_MAC80211(priv, "enter\n");
1469
1470         if (req->n_channels == 0)
1471                 return -EINVAL;
1472
1473         mutex_lock(&priv->shrd->mutex);
1474
1475         /*
1476          * If an internal scan is in progress, just set
1477          * up the scan_request as per above.
1478          */
1479         if (priv->scan_type != IWL_SCAN_NORMAL) {
1480                 IWL_DEBUG_SCAN(priv,
1481                                "SCAN request during internal scan - defer\n");
1482                 priv->scan_request = req;
1483                 priv->scan_vif = vif;
1484                 ret = 0;
1485         } else {
1486                 priv->scan_request = req;
1487                 priv->scan_vif = vif;
1488                 /*
1489                  * mac80211 will only ask for one band at a time
1490                  * so using channels[0] here is ok
1491                  */
1492                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1493                                         req->channels[0]->band);
1494                 if (ret) {
1495                         priv->scan_request = NULL;
1496                         priv->scan_vif = NULL;
1497                 }
1498         }
1499
1500         IWL_DEBUG_MAC80211(priv, "leave\n");
1501
1502         mutex_unlock(&priv->shrd->mutex);
1503
1504         return ret;
1505 }
1506
1507 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1508                        struct ieee80211_vif *vif,
1509                        struct ieee80211_sta *sta)
1510 {
1511         struct iwl_priv *priv = hw->priv;
1512         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1513         int ret;
1514
1515         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1516                            "station %pM\n", sta->addr);
1517         mutex_lock(&priv->shrd->mutex);
1518         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1519                         sta->addr);
1520         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1521         if (ret)
1522                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1523                         sta->addr);
1524         mutex_unlock(&priv->shrd->mutex);
1525         IWL_DEBUG_MAC80211(priv, "leave\n");
1526
1527         return ret;
1528 }
1529
1530 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1531 {
1532         unsigned long flags;
1533
1534         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1535         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1536         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1537         priv->stations[sta_id].sta.sta.modify_mask = 0;
1538         priv->stations[sta_id].sta.sleep_tx_count = 0;
1539         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1540         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1541         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1542
1543 }
1544
1545 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1546                            struct ieee80211_vif *vif,
1547                            enum sta_notify_cmd cmd,
1548                            struct ieee80211_sta *sta)
1549 {
1550         struct iwl_priv *priv = hw->priv;
1551         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1552         int sta_id;
1553
1554         IWL_DEBUG_MAC80211(priv, "enter\n");
1555
1556         switch (cmd) {
1557         case STA_NOTIFY_SLEEP:
1558                 WARN_ON(!sta_priv->client);
1559                 sta_priv->asleep = true;
1560                 if (atomic_read(&sta_priv->pending_frames) > 0)
1561                         ieee80211_sta_block_awake(hw, sta, true);
1562                 break;
1563         case STA_NOTIFY_AWAKE:
1564                 WARN_ON(!sta_priv->client);
1565                 if (!sta_priv->asleep)
1566                         break;
1567                 sta_priv->asleep = false;
1568                 sta_id = iwl_sta_id(sta);
1569                 if (sta_id != IWL_INVALID_STATION)
1570                         iwl_sta_modify_ps_wake(priv, sta_id);
1571                 break;
1572         default:
1573                 break;
1574         }
1575         IWL_DEBUG_MAC80211(priv, "leave\n");
1576 }
1577
1578 struct ieee80211_ops iwlagn_hw_ops = {
1579         .tx = iwlagn_mac_tx,
1580         .start = iwlagn_mac_start,
1581         .stop = iwlagn_mac_stop,
1582 #ifdef CONFIG_PM_SLEEP
1583         .suspend = iwlagn_mac_suspend,
1584         .resume = iwlagn_mac_resume,
1585 #endif
1586         .add_interface = iwlagn_mac_add_interface,
1587         .remove_interface = iwlagn_mac_remove_interface,
1588         .change_interface = iwlagn_mac_change_interface,
1589         .config = iwlagn_mac_config,
1590         .configure_filter = iwlagn_configure_filter,
1591         .set_key = iwlagn_mac_set_key,
1592         .update_tkip_key = iwlagn_mac_update_tkip_key,
1593         .set_rekey_data = iwlagn_mac_set_rekey_data,
1594         .conf_tx = iwlagn_mac_conf_tx,
1595         .bss_info_changed = iwlagn_bss_info_changed,
1596         .ampdu_action = iwlagn_mac_ampdu_action,
1597         .hw_scan = iwlagn_mac_hw_scan,
1598         .sta_notify = iwlagn_mac_sta_notify,
1599         .sta_add = iwlagn_mac_sta_add,
1600         .sta_remove = iwlagn_mac_sta_remove,
1601         .channel_switch = iwlagn_mac_channel_switch,
1602         .flush = iwlagn_mac_flush,
1603         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1604         .remain_on_channel = iwlagn_mac_remain_on_channel,
1605         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1606         .rssi_callback = iwlagn_mac_rssi_callback,
1607         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1608         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1609         .tx_sync = iwlagn_mac_tx_sync,
1610         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1611         .set_tim = iwlagn_mac_set_tim,
1612 };
1613
1614 /* This function both allocates and initializes hw and priv. */
1615 struct ieee80211_hw *iwl_alloc_all(void)
1616 {
1617         struct iwl_priv *priv;
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), &iwlagn_hw_ops);
1623         if (!hw)
1624                 goto out;
1625
1626         priv = hw->priv;
1627         priv->hw = hw;
1628
1629 out:
1630         return hw;
1631 }