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                 iwlagn_config_ht40(conf, ctx);
 809         else
 810                 ctx->ht.is_40mhz = false;
 811
 812         if ((le16_to_cpu(ctx->staging.channel) != ch))
 813                 ctx->staging.flags = 0;
 814
 815         iwl_set_rxon_channel(priv, channel, ctx);
 816         iwl_set_rxon_ht(priv, ht_conf);
 817         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 818
 819         spin_unlock_irq(&priv->shrd->lock);
 820
 821         iwl_set_rate(priv);
 822         /*
 823          * at this point, staging_rxon has the
 824          * configuration for channel switch
 825          */
 826         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 827         priv->switch_channel = cpu_to_le16(ch);
 828         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
 829                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
 830                 priv->switch_channel = 0;
 831                 ieee80211_chswitch_done(ctx->vif, false);
 832         }
 833
 834 out:
 835         mutex_unlock(&priv->shrd->mutex);
 836         IWL_DEBUG_MAC80211(priv, "leave\n");
 837 }
 838
 839 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
 840                                     unsigned int changed_flags,
 841                                     unsigned int *total_flags,
 842                                     u64 multicast)
 843 {
 844         struct iwl_priv *priv = hw->priv;
 845         __le32 filter_or = 0, filter_nand = 0;
 846         struct iwl_rxon_context *ctx;
 847
 848 #define CHK(test, flag) do { \
 849         if (*total_flags & (test))              \
 850                 filter_or |= (flag);            \
 851         else                                    \
 852                 filter_nand |= (flag);          \
 853         } while (0)
 854
 855         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
 856                         changed_flags, *total_flags);
 857
 858         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
 859         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
 860         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
 861         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 862
 863 #undef CHK
 864
 865         mutex_lock(&priv->shrd->mutex);
 866
 867         for_each_context(priv, ctx) {
 868                 ctx->staging.filter_flags &= ~filter_nand;
 869                 ctx->staging.filter_flags |= filter_or;
 870
 871                 /*
 872                  * Not committing directly because hardware can perform a scan,
 873                  * but we'll eventually commit the filter flags change anyway.
 874                  */
 875         }
 876
 877         mutex_unlock(&priv->shrd->mutex);
 878
 879         /*
 880          * Receiving all multicast frames is always enabled by the
 881          * default flags setup in iwl_connection_init_rx_config()
 882          * since we currently do not support programming multicast
 883          * filters into the device.
 884          */
 885         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
 886                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 887 }
 888
 889 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
 890 {
 891         struct iwl_priv *priv = hw->priv;
 892
 893         mutex_lock(&priv->shrd->mutex);
 894         IWL_DEBUG_MAC80211(priv, "enter\n");
 895
 896         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 897                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
 898                 goto done;
 899         }
 900         if (iwl_is_rfkill(priv->shrd)) {
 901                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
 902                 goto done;
 903         }
 904
 905         /*
 906          * mac80211 will not push any more frames for transmit
 907          * until the flush is completed
 908          */
 909         if (drop) {
 910                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
 911                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 912                         IWL_ERR(priv, "flush request fail\n");
 913                         goto done;
 914                 }
 915         }
 916         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
 917         iwl_trans_wait_tx_queue_empty(trans(priv));
 918 done:
 919         mutex_unlock(&priv->shrd->mutex);
 920         IWL_DEBUG_MAC80211(priv, "leave\n");
 921 }
 922
 923 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
 924                                      struct ieee80211_channel *channel,
 925                                      enum nl80211_channel_type channel_type,
 926                                      int duration)
 927 {
 928         struct iwl_priv *priv = hw->priv;
 929         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 930         int err = 0;
 931
 932         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
 933                 return -EOPNOTSUPP;
 934
 935         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
 936                 return -EOPNOTSUPP;
 937
 938         IWL_DEBUG_MAC80211(priv, "enter\n");
 939         mutex_lock(&priv->shrd->mutex);
 940
 941         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
 942                 err = -EBUSY;
 943                 goto out;
 944         }
 945
 946         priv->hw_roc_channel = channel;
 947         priv->hw_roc_chantype = channel_type;
 948         /* convert from ms to TU */
 949         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 950         priv->hw_roc_start_notified = false;
 951         cancel_delayed_work(&priv->hw_roc_disable_work);
 952
 953         if (!ctx->is_active) {
 954                 static const struct iwl_qos_info default_qos_data = {
 955                         .def_qos_parm = {
 956                                 .ac[0] = {
 957                                         .cw_min = cpu_to_le16(3),
 958                                         .cw_max = cpu_to_le16(7),
 959                                         .aifsn = 2,
 960                                         .edca_txop = cpu_to_le16(1504),
 961                                 },
 962                                 .ac[1] = {
 963                                         .cw_min = cpu_to_le16(7),
 964                                         .cw_max = cpu_to_le16(15),
 965                                         .aifsn = 2,
 966                                         .edca_txop = cpu_to_le16(3008),
 967                                 },
 968                                 .ac[2] = {
 969                                         .cw_min = cpu_to_le16(15),
 970                                         .cw_max = cpu_to_le16(1023),
 971                                         .aifsn = 3,
 972                                 },
 973                                 .ac[3] = {
 974                                         .cw_min = cpu_to_le16(15),
 975                                         .cw_max = cpu_to_le16(1023),
 976                                         .aifsn = 7,
 977                                 },
 978                         },
 979                 };
 980
 981                 ctx->is_active = true;
 982                 ctx->qos_data = default_qos_data;
 983                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 984                 memcpy(ctx->staging.node_addr,
 985                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 986                        ETH_ALEN);
 987                 memcpy(ctx->staging.bssid_addr,
 988                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
 989                        ETH_ALEN);
 990                 err = iwlagn_commit_rxon(priv, ctx);
 991                 if (err)
 992                         goto out;
 993                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
 994                                              RXON_FILTER_PROMISC_MSK |
 995                                              RXON_FILTER_CTL2HOST_MSK;
 996
 997                 err = iwlagn_commit_rxon(priv, ctx);
 998                 if (err) {
 999                         iwlagn_disable_roc(priv);
1000                         goto out;
1001                 }
1002                 priv->hw_roc_setup = true;
1003         }
1004
1005         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1006         if (err)
1007                 iwlagn_disable_roc(priv);
1008
1009  out:
1010         mutex_unlock(&priv->shrd->mutex);
1011         IWL_DEBUG_MAC80211(priv, "leave\n");
1012
1013         return err;
1014 }
1015
1016 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1017 {
1018         struct iwl_priv *priv = hw->priv;
1019
1020         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1021                 return -EOPNOTSUPP;
1022
1023         IWL_DEBUG_MAC80211(priv, "enter\n");
1024         mutex_lock(&priv->shrd->mutex);
1025         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1026         iwlagn_disable_roc(priv);
1027         mutex_unlock(&priv->shrd->mutex);
1028         IWL_DEBUG_MAC80211(priv, "leave\n");
1029
1030         return 0;
1031 }
1032
1033 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1034                               struct ieee80211_vif *vif,
1035                               const u8 *bssid,
1036                               enum ieee80211_tx_sync_type type)
1037 {
1038         struct iwl_priv *priv = hw->priv;
1039         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1040         struct iwl_rxon_context *ctx = vif_priv->ctx;
1041         int ret;
1042         u8 sta_id;
1043
1044         IWL_DEBUG_MAC80211(priv, "enter\n");
1045         mutex_lock(&priv->shrd->mutex);
1046
1047         if (iwl_is_associated_ctx(ctx)) {
1048                 ret = 0;
1049                 goto out;
1050         }
1051
1052         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1053             &priv->shrd->status)) {
1054                 ret = -EBUSY;
1055                 goto out;
1056         }
1057
1058         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1059         if (ret)
1060                 goto out;
1061
1062         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1063                 ret = -EIO;
1064                 goto out_remove_sta;
1065         }
1066
1067         memcpy(ctx->bssid, bssid, ETH_ALEN);
1068         ctx->preauth_bssid = true;
1069
1070         ret = iwlagn_commit_rxon(priv, ctx);
1071
1072         if (ret == 0)
1073                 goto out;
1074
1075  out_remove_sta:
1076         iwl_remove_station(priv, sta_id, bssid);
1077  out:
1078         mutex_unlock(&priv->shrd->mutex);
1079         IWL_DEBUG_MAC80211(priv, "leave\n");
1080
1081         return ret;
1082 }
1083
1084 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1085                                    struct ieee80211_vif *vif,
1086                                    const u8 *bssid,
1087                                    enum ieee80211_tx_sync_type type)
1088 {
1089         struct iwl_priv *priv = hw->priv;
1090         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1091         struct iwl_rxon_context *ctx = vif_priv->ctx;
1092
1093         IWL_DEBUG_MAC80211(priv, "enter\n");
1094         mutex_lock(&priv->shrd->mutex);
1095
1096         if (iwl_is_associated_ctx(ctx))
1097                 goto out;
1098
1099         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1100         ctx->preauth_bssid = false;
1101         /* no need to commit */
1102  out:
1103         mutex_unlock(&priv->shrd->mutex);
1104         IWL_DEBUG_MAC80211(priv, "leave\n");
1105 }
1106
1107 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1108                            enum ieee80211_rssi_event rssi_event)
1109 {
1110         struct iwl_priv *priv = hw->priv;
1111
1112         IWL_DEBUG_MAC80211(priv, "enter\n");
1113         mutex_lock(&priv->shrd->mutex);
1114
1115         if (priv->cfg->bt_params &&
1116                         priv->cfg->bt_params->advanced_bt_coexist) {
1117                 if (rssi_event == RSSI_EVENT_LOW)
1118                         priv->bt_enable_pspoll = true;
1119                 else if (rssi_event == RSSI_EVENT_HIGH)
1120                         priv->bt_enable_pspoll = false;
1121
1122                 iwlagn_send_advance_bt_config(priv);
1123         } else {
1124                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1125                                 "ignoring RSSI callback\n");
1126         }
1127
1128         mutex_unlock(&priv->shrd->mutex);
1129         IWL_DEBUG_MAC80211(priv, "leave\n");
1130 }
1131
1132 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1133                            struct ieee80211_sta *sta, bool set)
1134 {
1135         struct iwl_priv *priv = hw->priv;
1136
1137         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1138
1139         return 0;
1140 }
1141
1142 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1143                     struct ieee80211_vif *vif, u16 queue,
1144                     const struct ieee80211_tx_queue_params *params)
1145 {
1146         struct iwl_priv *priv = hw->priv;
1147         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1148         struct iwl_rxon_context *ctx = vif_priv->ctx;
1149         unsigned long flags;
1150         int q;
1151
1152         if (WARN_ON(!ctx))
1153                 return -EINVAL;
1154
1155         IWL_DEBUG_MAC80211(priv, "enter\n");
1156
1157         if (!iwl_is_ready_rf(priv->shrd)) {
1158                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1159                 return -EIO;
1160         }
1161
1162         if (queue >= AC_NUM) {
1163                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1164                 return 0;
1165         }
1166
1167         q = AC_NUM - 1 - queue;
1168
1169         spin_lock_irqsave(&priv->shrd->lock, flags);
1170
1171         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1172                 cpu_to_le16(params->cw_min);
1173         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1174                 cpu_to_le16(params->cw_max);
1175         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1176         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1177                         cpu_to_le16((params->txop * 32));
1178
1179         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1180
1181         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1182
1183         IWL_DEBUG_MAC80211(priv, "leave\n");
1184         return 0;
1185 }
1186
1187 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1188 {
1189         struct iwl_priv *priv = hw->priv;
1190
1191         return priv->ibss_manager == IWL_IBSS_MANAGER;
1192 }
1193
1194 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1195 {
1196         iwl_connection_init_rx_config(priv, ctx);
1197
1198         iwlagn_set_rxon_chain(priv, ctx);
1199
1200         return iwlagn_commit_rxon(priv, ctx);
1201 }
1202
1203 static int iwl_setup_interface(struct iwl_priv *priv,
1204                                struct iwl_rxon_context *ctx)
1205 {
1206         struct ieee80211_vif *vif = ctx->vif;
1207         int err;
1208
1209         lockdep_assert_held(&priv->shrd->mutex);
1210
1211         /*
1212          * This variable will be correct only when there's just
1213          * a single context, but all code using it is for hardware
1214          * that supports only one context.
1215          */
1216         priv->iw_mode = vif->type;
1217
1218         ctx->is_active = true;
1219
1220         err = iwl_set_mode(priv, ctx);
1221         if (err) {
1222                 if (!ctx->always_active)
1223                         ctx->is_active = false;
1224                 return err;
1225         }
1226
1227         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1228             vif->type == NL80211_IFTYPE_ADHOC) {
1229                 /*
1230                  * pretend to have high BT traffic as long as we
1231                  * are operating in IBSS mode, as this will cause
1232                  * the rate scaling etc. to behave as intended.
1233                  */
1234                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1235         }
1236
1237         return 0;
1238 }
1239
1240 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1241                              struct ieee80211_vif *vif)
1242 {
1243         struct iwl_priv *priv = hw->priv;
1244         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1245         struct iwl_rxon_context *tmp, *ctx = NULL;
1246         int err;
1247         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1248
1249         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1250                            viftype, vif->addr);
1251
1252         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1253
1254         mutex_lock(&priv->shrd->mutex);
1255
1256         iwlagn_disable_roc(priv);
1257
1258         if (!iwl_is_ready_rf(priv->shrd)) {
1259                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1260                 err = -EINVAL;
1261                 goto out;
1262         }
1263
1264         for_each_context(priv, tmp) {
1265                 u32 possible_modes =
1266                         tmp->interface_modes | tmp->exclusive_interface_modes;
1267
1268                 if (tmp->vif) {
1269                         /* check if this busy context is exclusive */
1270                         if (tmp->exclusive_interface_modes &
1271                                                 BIT(tmp->vif->type)) {
1272                                 err = -EINVAL;
1273                                 goto out;
1274                         }
1275                         continue;
1276                 }
1277
1278                 if (!(possible_modes & BIT(viftype)))
1279                         continue;
1280
1281                 /* have maybe usable context w/o interface */
1282                 ctx = tmp;
1283                 break;
1284         }
1285
1286         if (!ctx) {
1287                 err = -EOPNOTSUPP;
1288                 goto out;
1289         }
1290
1291         vif_priv->ctx = ctx;
1292         ctx->vif = vif;
1293
1294         err = iwl_setup_interface(priv, ctx);
1295         if (!err)
1296                 goto out;
1297
1298         ctx->vif = NULL;
1299         priv->iw_mode = NL80211_IFTYPE_STATION;
1300  out:
1301         mutex_unlock(&priv->shrd->mutex);
1302
1303         IWL_DEBUG_MAC80211(priv, "leave\n");
1304         return err;
1305 }
1306
1307 static void iwl_teardown_interface(struct iwl_priv *priv,
1308                                    struct ieee80211_vif *vif,
1309                                    bool mode_change)
1310 {
1311         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1312
1313         lockdep_assert_held(&priv->shrd->mutex);
1314
1315         if (priv->scan_vif == vif) {
1316                 iwl_scan_cancel_timeout(priv, 200);
1317                 iwl_force_scan_end(priv);
1318         }
1319
1320         if (!mode_change) {
1321                 iwl_set_mode(priv, ctx);
1322                 if (!ctx->always_active)
1323                         ctx->is_active = false;
1324         }
1325
1326         /*
1327          * When removing the IBSS interface, overwrite the
1328          * BT traffic load with the stored one from the last
1329          * notification, if any. If this is a device that
1330          * doesn't implement this, this has no effect since
1331          * both values are the same and zero.
1332          */
1333         if (vif->type == NL80211_IFTYPE_ADHOC)
1334                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1335 }
1336
1337 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1338                               struct ieee80211_vif *vif)
1339 {
1340         struct iwl_priv *priv = hw->priv;
1341         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1342
1343         IWL_DEBUG_MAC80211(priv, "enter\n");
1344
1345         mutex_lock(&priv->shrd->mutex);
1346
1347         if (WARN_ON(ctx->vif != vif)) {
1348                 struct iwl_rxon_context *tmp;
1349                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1350                 for_each_context(priv, tmp)
1351                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1352                                 tmp->ctxid, tmp, tmp->vif);
1353         }
1354         ctx->vif = NULL;
1355
1356         iwl_teardown_interface(priv, vif, false);
1357
1358         mutex_unlock(&priv->shrd->mutex);
1359
1360         IWL_DEBUG_MAC80211(priv, "leave\n");
1361
1362 }
1363
1364 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1365                                 struct ieee80211_vif *vif,
1366                                 enum nl80211_iftype newtype, bool newp2p)
1367 {
1368         struct iwl_priv *priv = hw->priv;
1369         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1370         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1371         struct iwl_rxon_context *tmp;
1372         enum nl80211_iftype newviftype = newtype;
1373         u32 interface_modes;
1374         int err;
1375
1376         IWL_DEBUG_MAC80211(priv, "enter\n");
1377
1378         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1379
1380         mutex_lock(&priv->shrd->mutex);
1381
1382         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1383                 /*
1384                  * Huh? But wait ... this can maybe happen when
1385                  * we're in the middle of a firmware restart!
1386                  */
1387                 err = -EBUSY;
1388                 goto out;
1389         }
1390
1391         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1392
1393         if (!(interface_modes & BIT(newtype))) {
1394                 err = -EBUSY;
1395                 goto out;
1396         }
1397
1398         /*
1399          * Refuse a change that should be done by moving from the PAN
1400          * context to the BSS context instead, if the BSS context is
1401          * available and can support the new interface type.
1402          */
1403         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1404             (bss_ctx->interface_modes & BIT(newtype) ||
1405              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1406                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1407                 err = -EBUSY;
1408                 goto out;
1409         }
1410
1411         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1412                 for_each_context(priv, tmp) {
1413                         if (ctx == tmp)
1414                                 continue;
1415
1416                         if (!tmp->vif)
1417                                 continue;
1418
1419                         /*
1420                          * The current mode switch would be exclusive, but
1421                          * another context is active ... refuse the switch.
1422                          */
1423                         err = -EBUSY;
1424                         goto out;
1425                 }
1426         }
1427
1428         /* success */
1429         iwl_teardown_interface(priv, vif, true);
1430         vif->type = newviftype;
1431         vif->p2p = newp2p;
1432         err = iwl_setup_interface(priv, ctx);
1433         WARN_ON(err);
1434         /*
1435          * We've switched internally, but submitting to the
1436          * device may have failed for some reason. Mask this
1437          * error, because otherwise mac80211 will not switch
1438          * (and set the interface type back) and we'll be
1439          * out of sync with it.
1440          */
1441         err = 0;
1442
1443  out:
1444         mutex_unlock(&priv->shrd->mutex);
1445         IWL_DEBUG_MAC80211(priv, "leave\n");
1446
1447         return err;
1448 }
1449
1450 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1451                     struct ieee80211_vif *vif,
1452                     struct cfg80211_scan_request *req)
1453 {
1454         struct iwl_priv *priv = hw->priv;
1455         int ret;
1456
1457         IWL_DEBUG_MAC80211(priv, "enter\n");
1458
1459         if (req->n_channels == 0)
1460                 return -EINVAL;
1461
1462         mutex_lock(&priv->shrd->mutex);
1463
1464         /*
1465          * If an internal scan is in progress, just set
1466          * up the scan_request as per above.
1467          */
1468         if (priv->scan_type != IWL_SCAN_NORMAL) {
1469                 IWL_DEBUG_SCAN(priv,
1470                                "SCAN request during internal scan - defer\n");
1471                 priv->scan_request = req;
1472                 priv->scan_vif = vif;
1473                 ret = 0;
1474         } else {
1475                 priv->scan_request = req;
1476                 priv->scan_vif = vif;
1477                 /*
1478                  * mac80211 will only ask for one band at a time
1479                  * so using channels[0] here is ok
1480                  */
1481                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1482                                         req->channels[0]->band);
1483                 if (ret) {
1484                         priv->scan_request = NULL;
1485                         priv->scan_vif = NULL;
1486                 }
1487         }
1488
1489         IWL_DEBUG_MAC80211(priv, "leave\n");
1490
1491         mutex_unlock(&priv->shrd->mutex);
1492
1493         return ret;
1494 }
1495
1496 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1497                        struct ieee80211_vif *vif,
1498                        struct ieee80211_sta *sta)
1499 {
1500         struct iwl_priv *priv = hw->priv;
1501         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1502         int ret;
1503
1504         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1505                            "station %pM\n", sta->addr);
1506         mutex_lock(&priv->shrd->mutex);
1507         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1508                         sta->addr);
1509         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1510         if (ret)
1511                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1512                         sta->addr);
1513         mutex_unlock(&priv->shrd->mutex);
1514         IWL_DEBUG_MAC80211(priv, "leave\n");
1515
1516         return ret;
1517 }
1518
1519 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1520 {
1521         unsigned long flags;
1522
1523         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1524         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1525         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1526         priv->stations[sta_id].sta.sta.modify_mask = 0;
1527         priv->stations[sta_id].sta.sleep_tx_count = 0;
1528         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1529         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1530         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1531
1532 }
1533
1534 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1535                            struct ieee80211_vif *vif,
1536                            enum sta_notify_cmd cmd,
1537                            struct ieee80211_sta *sta)
1538 {
1539         struct iwl_priv *priv = hw->priv;
1540         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1541         int sta_id;
1542
1543         IWL_DEBUG_MAC80211(priv, "enter\n");
1544
1545         switch (cmd) {
1546         case STA_NOTIFY_SLEEP:
1547                 WARN_ON(!sta_priv->client);
1548                 sta_priv->asleep = true;
1549                 if (atomic_read(&sta_priv->pending_frames) > 0)
1550                         ieee80211_sta_block_awake(hw, sta, true);
1551                 break;
1552         case STA_NOTIFY_AWAKE:
1553                 WARN_ON(!sta_priv->client);
1554                 if (!sta_priv->asleep)
1555                         break;
1556                 sta_priv->asleep = false;
1557                 sta_id = iwl_sta_id(sta);
1558                 if (sta_id != IWL_INVALID_STATION)
1559                         iwl_sta_modify_ps_wake(priv, sta_id);
1560                 break;
1561         default:
1562                 break;
1563         }
1564         IWL_DEBUG_MAC80211(priv, "leave\n");
1565 }
1566
1567 struct ieee80211_ops iwlagn_hw_ops = {
1568         .tx = iwlagn_mac_tx,
1569         .start = iwlagn_mac_start,
1570         .stop = iwlagn_mac_stop,
1571 #ifdef CONFIG_PM_SLEEP
1572         .suspend = iwlagn_mac_suspend,
1573         .resume = iwlagn_mac_resume,
1574 #endif
1575         .add_interface = iwlagn_mac_add_interface,
1576         .remove_interface = iwlagn_mac_remove_interface,
1577         .change_interface = iwlagn_mac_change_interface,
1578         .config = iwlagn_mac_config,
1579         .configure_filter = iwlagn_configure_filter,
1580         .set_key = iwlagn_mac_set_key,
1581         .update_tkip_key = iwlagn_mac_update_tkip_key,
1582         .set_rekey_data = iwlagn_mac_set_rekey_data,
1583         .conf_tx = iwlagn_mac_conf_tx,
1584         .bss_info_changed = iwlagn_bss_info_changed,
1585         .ampdu_action = iwlagn_mac_ampdu_action,
1586         .hw_scan = iwlagn_mac_hw_scan,
1587         .sta_notify = iwlagn_mac_sta_notify,
1588         .sta_add = iwlagn_mac_sta_add,
1589         .sta_remove = iwlagn_mac_sta_remove,
1590         .channel_switch = iwlagn_mac_channel_switch,
1591         .flush = iwlagn_mac_flush,
1592         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1593         .remain_on_channel = iwlagn_mac_remain_on_channel,
1594         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1595         .rssi_callback = iwlagn_mac_rssi_callback,
1596         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1597         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1598         .tx_sync = iwlagn_mac_tx_sync,
1599         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1600         .set_tim = iwlagn_mac_set_tim,
1601 };
1602
1603 /* This function both allocates and initializes hw and priv. */
1604 struct ieee80211_hw *iwl_alloc_all(void)
1605 {
1606         struct iwl_priv *priv;
1607         /* mac80211 allocates memory for this device instance, including
1608          *   space for this driver's private structure */
1609         struct ieee80211_hw *hw;
1610
1611         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1612         if (!hw)
1613                 goto out;
1614
1615         priv = hw->priv;
1616         priv->hw = hw;
1617
1618 out:
1619         return hw;
1620 }