drivers/net/wireless/iwlwifi/dvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/ieee80211_radiotap.h>
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-io.h"
  47 #include "iwl-trans.h"
  48 #include "iwl-op-mode.h"
  49 #include "iwl-modparams.h"
  50
  51 #include "dev.h"
  52 #include "calib.h"
  53 #include "agn.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 151                     IEEE80211_HW_QUEUE_CONTROL |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_WANT_MONITOR_VIF;
 155
 156         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 157         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 158
 159         /*
 160          * Including the following line will crash some AP's.  This
 161          * workaround removes the stimulus which causes the crash until
 162          * the AP software can be fixed.
 163         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 164          */
 165
 166         if (priv->nvm_data->sku_cap_11n_enable)
 167                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 168                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 169
 170         /*
 171          * Enable 11w if advertised by firmware and software crypto
 172          * is not enabled (as the firmware will interpret some mgmt
 173          * packets, so enabling it with software crypto isn't safe)
 174          */
 175         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 176             !iwlwifi_mod_params.sw_crypto)
 177                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 178
 179         hw->sta_data_size = sizeof(struct iwl_station_priv);
 180         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 181
 182         for_each_context(priv, ctx) {
 183                 hw->wiphy->interface_modes |= ctx->interface_modes;
 184                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 185         }
 186
 187         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 188
 189         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 190                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 191                 hw->wiphy->n_iface_combinations =
 192                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 193         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 194                 hw->wiphy->iface_combinations =
 195                         iwlagn_iface_combinations_dualmode;
 196                 hw->wiphy->n_iface_combinations =
 197                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 198         }
 199
 200         hw->wiphy->max_remain_on_channel_duration = 500;
 201
 202         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 203                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 204                             WIPHY_FLAG_IBSS_RSN;
 205
 206 #ifdef CONFIG_PM_SLEEP
 207         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 208             priv->trans->ops->d3_suspend &&
 209             priv->trans->ops->d3_resume &&
 210             device_can_wakeup(priv->trans->dev)) {
 211                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 212                                           WIPHY_WOWLAN_DISCONNECT |
 213                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 214                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 215                 if (!iwlwifi_mod_params.sw_crypto)
 216                         hw->wiphy->wowlan.flags |=
 217                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 218                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 219
 220                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 221                 hw->wiphy->wowlan.pattern_min_len =
 222                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 223                 hw->wiphy->wowlan.pattern_max_len =
 224                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 225         }
 226 #endif
 227
 228         if (iwlwifi_mod_params.power_save)
 229                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 230         else
 231                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 232
 233         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 234         /* we create the 802.11 header and a max-length SSID element */
 235         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 236
 237         /*
 238          * We don't use all queues: 4 and 9 are unused and any
 239          * aggregation queue gets mapped down to the AC queue.
 240          */
 241         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 242
 243         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 244
 245         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 246                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 247                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 248         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 249                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 250                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 251
 252         hw->wiphy->hw_version = priv->trans->hw_id;
 253
 254         iwl_leds_init(priv);
 255
 256         ret = ieee80211_register_hw(priv->hw);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 259                 iwl_leds_exit(priv);
 260                 return ret;
 261         }
 262         priv->mac80211_registered = 1;
 263
 264         return 0;
 265 }
 266
 267 void iwlagn_mac_unregister(struct iwl_priv *priv)
 268 {
 269         if (!priv->mac80211_registered)
 270                 return;
 271         iwl_leds_exit(priv);
 272         ieee80211_unregister_hw(priv->hw);
 273         priv->mac80211_registered = 0;
 274 }
 275
 276 static int __iwl_up(struct iwl_priv *priv)
 277 {
 278         struct iwl_rxon_context *ctx;
 279         int ret;
 280
 281         lockdep_assert_held(&priv->mutex);
 282
 283         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 284                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 285                 return -EIO;
 286         }
 287
 288         for_each_context(priv, ctx) {
 289                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 290                 if (ret) {
 291                         iwl_dealloc_bcast_stations(priv);
 292                         return ret;
 293                 }
 294         }
 295
 296         ret = iwl_run_init_ucode(priv);
 297         if (ret) {
 298                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 299                 goto error;
 300         }
 301
 302         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 303         if (ret) {
 304                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 305                 goto error;
 306         }
 307
 308         ret = iwl_alive_start(priv);
 309         if (ret)
 310                 goto error;
 311         return 0;
 312
 313  error:
 314         set_bit(STATUS_EXIT_PENDING, &priv->status);
 315         iwl_down(priv);
 316         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 317
 318         IWL_ERR(priv, "Unable to initialize device.\n");
 319         return ret;
 320 }
 321
 322 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 323 {
 324         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 325         int ret;
 326
 327         IWL_DEBUG_MAC80211(priv, "enter\n");
 328
 329         /* we should be verifying the device is ready to be opened */
 330         mutex_lock(&priv->mutex);
 331         ret = __iwl_up(priv);
 332         mutex_unlock(&priv->mutex);
 333         if (ret)
 334                 return ret;
 335
 336         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 337
 338         /* Now we should be done, and the READY bit should be set. */
 339         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 340                 ret = -EIO;
 341
 342         iwlagn_led_enable(priv);
 343
 344         priv->is_open = 1;
 345         IWL_DEBUG_MAC80211(priv, "leave\n");
 346         return 0;
 347 }
 348
 349 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 350 {
 351         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354
 355         if (!priv->is_open)
 356                 return;
 357
 358         priv->is_open = 0;
 359
 360         mutex_lock(&priv->mutex);
 361         iwl_down(priv);
 362         mutex_unlock(&priv->mutex);
 363
 364         iwl_cancel_deferred_work(priv);
 365
 366         flush_workqueue(priv->workqueue);
 367
 368         /* User space software may expect getting rfkill changes
 369          * even if interface is down, trans->down will leave the RF
 370          * kill interrupt enabled
 371          */
 372         iwl_trans_stop_hw(priv->trans, false);
 373
 374         IWL_DEBUG_MAC80211(priv, "leave\n");
 375 }
 376
 377 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 378                                       struct ieee80211_vif *vif,
 379                                       struct cfg80211_gtk_rekey_data *data)
 380 {
 381         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 382
 383         if (iwlwifi_mod_params.sw_crypto)
 384                 return;
 385
 386         IWL_DEBUG_MAC80211(priv, "enter\n");
 387         mutex_lock(&priv->mutex);
 388
 389         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 390                 goto out;
 391
 392         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 393         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 394         priv->replay_ctr =
 395                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 396         priv->have_rekey_data = true;
 397
 398  out:
 399         mutex_unlock(&priv->mutex);
 400         IWL_DEBUG_MAC80211(priv, "leave\n");
 401 }
 402
 403 #ifdef CONFIG_PM_SLEEP
 404
 405 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 406                               struct cfg80211_wowlan *wowlan)
 407 {
 408         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 409         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 410         int ret;
 411
 412         if (WARN_ON(!wowlan))
 413                 return -EINVAL;
 414
 415         IWL_DEBUG_MAC80211(priv, "enter\n");
 416         mutex_lock(&priv->mutex);
 417
 418         /* Don't attempt WoWLAN when not associated, tear down instead. */
 419         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 420             !iwl_is_associated_ctx(ctx)) {
 421                 ret = 1;
 422                 goto out;
 423         }
 424
 425         ret = iwlagn_suspend(priv, wowlan);
 426         if (ret)
 427                 goto error;
 428
 429         iwl_trans_d3_suspend(priv->trans);
 430
 431         goto out;
 432
 433  error:
 434         priv->wowlan = false;
 435         iwlagn_prepare_restart(priv);
 436         ieee80211_restart_hw(priv->hw);
 437  out:
 438         mutex_unlock(&priv->mutex);
 439         IWL_DEBUG_MAC80211(priv, "leave\n");
 440
 441         return ret;
 442 }
 443
 444 struct iwl_resume_data {
 445         struct iwl_priv *priv;
 446         struct iwlagn_wowlan_status *cmd;
 447         bool valid;
 448 };
 449
 450 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 451                                  struct iwl_rx_packet *pkt, void *data)
 452 {
 453         struct iwl_resume_data *resume_data = data;
 454         struct iwl_priv *priv = resume_data->priv;
 455         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 456
 457         if (len - 4 != sizeof(*resume_data->cmd)) {
 458                 IWL_ERR(priv, "rx wrong size data\n");
 459                 return true;
 460         }
 461         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 462         resume_data->valid = true;
 463
 464         return true;
 465 }
 466
 467 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 468 {
 469         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 470         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 471         struct ieee80211_vif *vif;
 472         u32 base;
 473         int ret;
 474         enum iwl_d3_status d3_status;
 475         struct error_table_start {
 476                 /* cf. struct iwl_error_event_table */
 477                 u32 valid;
 478                 u32 error_id;
 479         } err_info;
 480         struct iwl_notification_wait status_wait;
 481         static const u8 status_cmd[] = {
 482                 REPLY_WOWLAN_GET_STATUS,
 483         };
 484         struct iwlagn_wowlan_status status_data = {};
 485         struct iwl_resume_data resume_data = {
 486                 .priv = priv,
 487                 .cmd = &status_data,
 488                 .valid = false,
 489         };
 490         struct cfg80211_wowlan_wakeup wakeup = {
 491                 .pattern_idx = -1,
 492         };
 493 #ifdef CONFIG_IWLWIFI_DEBUGFS
 494         const struct fw_img *img;
 495 #endif
 496
 497         IWL_DEBUG_MAC80211(priv, "enter\n");
 498         mutex_lock(&priv->mutex);
 499
 500         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 501         vif = ctx->vif;
 502
 503         ret = iwl_trans_d3_resume(priv->trans, &d3_status);
 504         if (ret)
 505                 goto out_unlock;
 506
 507         if (d3_status != IWL_D3_STATUS_ALIVE) {
 508                 IWL_INFO(priv, "Device was reset during suspend\n");
 509                 goto out_unlock;
 510         }
 511
 512         base = priv->device_pointers.error_event_table;
 513         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 514                 IWL_WARN(priv, "Invalid error table during resume!\n");
 515                 goto out_unlock;
 516         }
 517
 518         iwl_trans_read_mem_bytes(priv->trans, base,
 519                                  &err_info, sizeof(err_info));
 520
 521         if (err_info.valid) {
 522                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 523                          err_info.valid, err_info.error_id);
 524                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 525                         wakeup.rfkill_release = true;
 526                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 527                                                        GFP_KERNEL);
 528                 }
 529                 goto out_unlock;
 530         }
 531
 532 #ifdef CONFIG_IWLWIFI_DEBUGFS
 533         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 534         if (!priv->wowlan_sram)
 535                 priv->wowlan_sram =
 536                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 537                                 GFP_KERNEL);
 538
 539         if (priv->wowlan_sram)
 540                 iwl_trans_read_mem(priv->trans, 0x800000,
 541                                    priv->wowlan_sram,
 542                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 543 #endif
 544
 545         /*
 546          * This is very strange. The GET_STATUS command is sent but the device
 547          * doesn't reply properly, it seems it doesn't close the RBD so one is
 548          * always left open ... As a result, we need to send another command
 549          * and have to reset the driver afterwards. As we need to switch to
 550          * runtime firmware again that'll happen.
 551          */
 552
 553         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 554                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 555                                    &resume_data);
 556
 557         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 558         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 559         /* an RBD is left open in the firmware now! */
 560
 561         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 562         if (ret)
 563                 goto out_unlock;
 564
 565         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 566                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 567                 struct cfg80211_wowlan_wakeup *wakeup_report;
 568
 569                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 570
 571                 if (reasons) {
 572                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 573                                 wakeup.magic_pkt = true;
 574                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 575                                 wakeup.pattern_idx = status_data.pattern_number;
 576                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 577                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 578                                 wakeup.disconnect = true;
 579                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 580                                 wakeup.gtk_rekey_failure = true;
 581                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 582                                 wakeup.eap_identity_req = true;
 583                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 584                                 wakeup.four_way_handshake = true;
 585                         wakeup_report = &wakeup;
 586                 } else {
 587                         wakeup_report = NULL;
 588                 }
 589
 590                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 591         }
 592
 593         priv->wowlan = false;
 594
 595         iwlagn_prepare_restart(priv);
 596
 597         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 598         iwl_connection_init_rx_config(priv, ctx);
 599         iwlagn_set_rxon_chain(priv, ctx);
 600
 601  out_unlock:
 602         mutex_unlock(&priv->mutex);
 603         IWL_DEBUG_MAC80211(priv, "leave\n");
 604
 605         ieee80211_resume_disconnect(vif);
 606
 607         return 1;
 608 }
 609
 610 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 611 {
 612         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 613
 614         device_set_wakeup_enable(priv->trans->dev, enabled);
 615 }
 616 #endif
 617
 618 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 619                           struct ieee80211_tx_control *control,
 620                           struct sk_buff *skb)
 621 {
 622         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 623
 624         if (iwlagn_tx_skb(priv, control->sta, skb))
 625                 ieee80211_free_txskb(hw, skb);
 626 }
 627
 628 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 629                                        struct ieee80211_vif *vif,
 630                                        struct ieee80211_key_conf *keyconf,
 631                                        struct ieee80211_sta *sta,
 632                                        u32 iv32, u16 *phase1key)
 633 {
 634         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 635
 636         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 637 }
 638
 639 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 640                               struct ieee80211_vif *vif,
 641                               struct ieee80211_sta *sta,
 642                               struct ieee80211_key_conf *key)
 643 {
 644         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 645         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 646         struct iwl_rxon_context *ctx = vif_priv->ctx;
 647         int ret;
 648         bool is_default_wep_key = false;
 649
 650         IWL_DEBUG_MAC80211(priv, "enter\n");
 651
 652         if (iwlwifi_mod_params.sw_crypto) {
 653                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 654                 return -EOPNOTSUPP;
 655         }
 656
 657         switch (key->cipher) {
 658         case WLAN_CIPHER_SUITE_TKIP:
 659                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 660                 /* fall through */
 661         case WLAN_CIPHER_SUITE_CCMP:
 662                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 663                 break;
 664         default:
 665                 break;
 666         }
 667
 668         /*
 669          * We could program these keys into the hardware as well, but we
 670          * don't expect much multicast traffic in IBSS and having keys
 671          * for more stations is probably more useful.
 672          *
 673          * Mark key TX-only and return 0.
 674          */
 675         if (vif->type == NL80211_IFTYPE_ADHOC &&
 676             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 677                 key->hw_key_idx = WEP_INVALID_OFFSET;
 678                 return 0;
 679         }
 680
 681         /* If they key was TX-only, accept deletion */
 682         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 683                 return 0;
 684
 685         mutex_lock(&priv->mutex);
 686         iwl_scan_cancel_timeout(priv, 100);
 687
 688         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 689
 690         /*
 691          * If we are getting WEP group key and we didn't receive any key mapping
 692          * so far, we are in legacy wep mode (group key only), otherwise we are
 693          * in 1X mode.
 694          * In legacy wep mode, we use another host command to the uCode.
 695          */
 696         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 697              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 698                 if (cmd == SET_KEY)
 699                         is_default_wep_key = !ctx->key_mapping_keys;
 700                 else
 701                         is_default_wep_key =
 702                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 703         }
 704
 705
 706         switch (cmd) {
 707         case SET_KEY:
 708                 if (is_default_wep_key) {
 709                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 710                         break;
 711                 }
 712                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 713                 if (ret) {
 714                         /*
 715                          * can't add key for RX, but we don't need it
 716                          * in the device for TX so still return 0
 717                          */
 718                         ret = 0;
 719                         key->hw_key_idx = WEP_INVALID_OFFSET;
 720                 }
 721
 722                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 723                 break;
 724         case DISABLE_KEY:
 725                 if (is_default_wep_key)
 726                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 727                 else
 728                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 729
 730                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 731                 break;
 732         default:
 733                 ret = -EINVAL;
 734         }
 735
 736         mutex_unlock(&priv->mutex);
 737         IWL_DEBUG_MAC80211(priv, "leave\n");
 738
 739         return ret;
 740 }
 741
 742 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 743                                    struct ieee80211_vif *vif,
 744                                    enum ieee80211_ampdu_mlme_action action,
 745                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 746                                    u8 buf_size)
 747 {
 748         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 749         int ret = -EINVAL;
 750         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 751
 752         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 753                      sta->addr, tid);
 754
 755         if (!(priv->nvm_data->sku_cap_11n_enable))
 756                 return -EACCES;
 757
 758         IWL_DEBUG_MAC80211(priv, "enter\n");
 759         mutex_lock(&priv->mutex);
 760
 761         switch (action) {
 762         case IEEE80211_AMPDU_RX_START:
 763                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 764                         break;
 765                 IWL_DEBUG_HT(priv, "start Rx\n");
 766                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 767                 break;
 768         case IEEE80211_AMPDU_RX_STOP:
 769                 IWL_DEBUG_HT(priv, "stop Rx\n");
 770                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 771                 break;
 772         case IEEE80211_AMPDU_TX_START:
 773                 if (!priv->trans->ops->txq_enable)
 774                         break;
 775                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 776                         break;
 777                 IWL_DEBUG_HT(priv, "start Tx\n");
 778                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 779                 break;
 780         case IEEE80211_AMPDU_TX_STOP_CONT:
 781         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 782         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 783                 IWL_DEBUG_HT(priv, "stop Tx\n");
 784                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 785                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 786                         priv->agg_tids_count--;
 787                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 788                                      priv->agg_tids_count);
 789                 }
 790                 if (!priv->agg_tids_count &&
 791                     priv->hw_params.use_rts_for_aggregation) {
 792                         /*
 793                          * switch off RTS/CTS if it was previously enabled
 794                          */
 795                         sta_priv->lq_sta.lq.general_params.flags &=
 796                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 797                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 798                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 799                 }
 800                 break;
 801         case IEEE80211_AMPDU_TX_OPERATIONAL:
 802                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 803                 break;
 804         }
 805         mutex_unlock(&priv->mutex);
 806         IWL_DEBUG_MAC80211(priv, "leave\n");
 807         return ret;
 808 }
 809
 810 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 811                               struct ieee80211_vif *vif,
 812                               struct ieee80211_sta *sta)
 813 {
 814         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 815         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 816         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 817         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 818         int ret;
 819         u8 sta_id;
 820
 821         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 822                         sta->addr);
 823         sta_priv->sta_id = IWL_INVALID_STATION;
 824
 825         atomic_set(&sta_priv->pending_frames, 0);
 826         if (vif->type == NL80211_IFTYPE_AP)
 827                 sta_priv->client = true;
 828
 829         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 830                                      is_ap, sta, &sta_id);
 831         if (ret) {
 832                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 833                         sta->addr, ret);
 834                 /* Should we return success if return code is EEXIST ? */
 835                 return ret;
 836         }
 837
 838         sta_priv->sta_id = sta_id;
 839
 840         return 0;
 841 }
 842
 843 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 844                                  struct ieee80211_vif *vif,
 845                                  struct ieee80211_sta *sta)
 846 {
 847         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 848         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 849         int ret;
 850
 851         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 852
 853         if (vif->type == NL80211_IFTYPE_STATION) {
 854                 /*
 855                  * Station will be removed from device when the RXON
 856                  * is set to unassociated -- just deactivate it here
 857                  * to avoid re-programming it.
 858                  */
 859                 ret = 0;
 860                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 861         } else {
 862                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 863                 if (ret)
 864                         IWL_DEBUG_QUIET_RFKILL(priv,
 865                                 "Error removing station %pM\n", sta->addr);
 866         }
 867         return ret;
 868 }
 869
 870 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 871                                 struct ieee80211_vif *vif,
 872                                 struct ieee80211_sta *sta,
 873                                 enum ieee80211_sta_state old_state,
 874                                 enum ieee80211_sta_state new_state)
 875 {
 876         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 877         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 878         enum {
 879                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 880         } op = NONE;
 881         int ret;
 882
 883         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 884                            sta->addr, old_state, new_state);
 885
 886         mutex_lock(&priv->mutex);
 887         if (vif->type == NL80211_IFTYPE_STATION) {
 888                 if (old_state == IEEE80211_STA_NOTEXIST &&
 889                     new_state == IEEE80211_STA_NONE)
 890                         op = ADD;
 891                 else if (old_state == IEEE80211_STA_NONE &&
 892                          new_state == IEEE80211_STA_NOTEXIST)
 893                         op = REMOVE;
 894                 else if (old_state == IEEE80211_STA_AUTH &&
 895                          new_state == IEEE80211_STA_ASSOC)
 896                         op = HT_RATE_INIT;
 897         } else {
 898                 if (old_state == IEEE80211_STA_AUTH &&
 899                     new_state == IEEE80211_STA_ASSOC)
 900                         op = ADD_RATE_INIT;
 901                 else if (old_state == IEEE80211_STA_ASSOC &&
 902                          new_state == IEEE80211_STA_AUTH)
 903                         op = REMOVE;
 904         }
 905
 906         switch (op) {
 907         case ADD:
 908                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 909                 if (ret)
 910                         break;
 911                 /*
 912                  * Clear the in-progress flag, the AP station entry was added
 913                  * but we'll initialize LQ only when we've associated (which
 914                  * would also clear the in-progress flag). This is necessary
 915                  * in case we never initialize LQ because association fails.
 916                  */
 917                 spin_lock_bh(&priv->sta_lock);
 918                 priv->stations[iwl_sta_id(sta)].used &=
 919                         ~IWL_STA_UCODE_INPROGRESS;
 920                 spin_unlock_bh(&priv->sta_lock);
 921                 break;
 922         case REMOVE:
 923                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 924                 break;
 925         case ADD_RATE_INIT:
 926                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 927                 if (ret)
 928                         break;
 929                 /* Initialize rate scaling */
 930                 IWL_DEBUG_INFO(priv,
 931                                "Initializing rate scaling for station %pM\n",
 932                                sta->addr);
 933                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 934                 ret = 0;
 935                 break;
 936         case HT_RATE_INIT:
 937                 /* Initialize rate scaling */
 938                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 939                 if (ret)
 940                         break;
 941                 IWL_DEBUG_INFO(priv,
 942                                "Initializing rate scaling for station %pM\n",
 943                                sta->addr);
 944                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 945                 ret = 0;
 946                 break;
 947         default:
 948                 ret = 0;
 949                 break;
 950         }
 951
 952         /*
 953          * mac80211 might WARN if we fail, but due the way we
 954          * (badly) handle hard rfkill, we might fail here
 955          */
 956         if (iwl_is_rfkill(priv))
 957                 ret = 0;
 958
 959         mutex_unlock(&priv->mutex);
 960         IWL_DEBUG_MAC80211(priv, "leave\n");
 961
 962         return ret;
 963 }
 964
 965 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 966                                       struct ieee80211_channel_switch *ch_switch)
 967 {
 968         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 969         struct ieee80211_conf *conf = &hw->conf;
 970         struct ieee80211_channel *channel = ch_switch->channel;
 971         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 972         /*
 973          * MULTI-FIXME
 974          * When we add support for multiple interfaces, we need to
 975          * revisit this. The channel switch command in the device
 976          * only affects the BSS context, but what does that really
 977          * mean? And what if we get a CSA on the second interface?
 978          * This needs a lot of work.
 979          */
 980         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 981         u16 ch;
 982
 983         IWL_DEBUG_MAC80211(priv, "enter\n");
 984
 985         mutex_lock(&priv->mutex);
 986
 987         if (iwl_is_rfkill(priv))
 988                 goto out;
 989
 990         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 991             test_bit(STATUS_SCANNING, &priv->status) ||
 992             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 993                 goto out;
 994
 995         if (!iwl_is_associated_ctx(ctx))
 996                 goto out;
 997
 998         if (!priv->lib->set_channel_switch)
 999                 goto out;
1000
1001         ch = channel->hw_value;
1002         if (le16_to_cpu(ctx->active.channel) == ch)
1003                 goto out;
1004
1005         priv->current_ht_config.smps = conf->smps_mode;
1006
1007         /* Configure HT40 channels */
1008         ctx->ht.enabled = conf_is_ht(conf);
1009         if (ctx->ht.enabled)
1010                 iwlagn_config_ht40(conf, ctx);
1011         else
1012                 ctx->ht.is_40mhz = false;
1013
1014         if ((le16_to_cpu(ctx->staging.channel) != ch))
1015                 ctx->staging.flags = 0;
1016
1017         iwl_set_rxon_channel(priv, channel, ctx);
1018         iwl_set_rxon_ht(priv, ht_conf);
1019         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1020
1021         /*
1022          * at this point, staging_rxon has the
1023          * configuration for channel switch
1024          */
1025         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1026         priv->switch_channel = cpu_to_le16(ch);
1027         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1028                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1029                 priv->switch_channel = 0;
1030                 ieee80211_chswitch_done(ctx->vif, false);
1031         }
1032
1033 out:
1034         mutex_unlock(&priv->mutex);
1035         IWL_DEBUG_MAC80211(priv, "leave\n");
1036 }
1037
1038 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1039 {
1040         /*
1041          * MULTI-FIXME
1042          * See iwlagn_mac_channel_switch.
1043          */
1044         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1045
1046         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1047                 return;
1048
1049         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1050                 ieee80211_chswitch_done(ctx->vif, is_success);
1051 }
1052
1053 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1054                                     unsigned int changed_flags,
1055                                     unsigned int *total_flags,
1056                                     u64 multicast)
1057 {
1058         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1059         __le32 filter_or = 0, filter_nand = 0;
1060         struct iwl_rxon_context *ctx;
1061
1062 #define CHK(test, flag) do { \
1063         if (*total_flags & (test))              \
1064                 filter_or |= (flag);            \
1065         else                                    \
1066                 filter_nand |= (flag);          \
1067         } while (0)
1068
1069         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1070                         changed_flags, *total_flags);
1071
1072         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1073         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1074         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1075         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1076
1077 #undef CHK
1078
1079         mutex_lock(&priv->mutex);
1080
1081         for_each_context(priv, ctx) {
1082                 ctx->staging.filter_flags &= ~filter_nand;
1083                 ctx->staging.filter_flags |= filter_or;
1084
1085                 /*
1086                  * Not committing directly because hardware can perform a scan,
1087                  * but we'll eventually commit the filter flags change anyway.
1088                  */
1089         }
1090
1091         mutex_unlock(&priv->mutex);
1092
1093         /*
1094          * Receiving all multicast frames is always enabled by the
1095          * default flags setup in iwl_connection_init_rx_config()
1096          * since we currently do not support programming multicast
1097          * filters into the device.
1098          */
1099         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1100                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1101 }
1102
1103 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1104 {
1105         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1106
1107         mutex_lock(&priv->mutex);
1108         IWL_DEBUG_MAC80211(priv, "enter\n");
1109
1110         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1111                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1112                 goto done;
1113         }
1114         if (iwl_is_rfkill(priv)) {
1115                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1116                 goto done;
1117         }
1118
1119         /*
1120          * mac80211 will not push any more frames for transmit
1121          * until the flush is completed
1122          */
1123         if (drop) {
1124                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1125                 if (iwlagn_txfifo_flush(priv)) {
1126                         IWL_ERR(priv, "flush request fail\n");
1127                         goto done;
1128                 }
1129         }
1130         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1131         iwl_trans_wait_tx_queue_empty(priv->trans);
1132 done:
1133         mutex_unlock(&priv->mutex);
1134         IWL_DEBUG_MAC80211(priv, "leave\n");
1135 }
1136
1137 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1138                                      struct ieee80211_vif *vif,
1139                                      struct ieee80211_channel *channel,
1140                                      int duration)
1141 {
1142         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1143         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1144         int err = 0;
1145
1146         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1147                 return -EOPNOTSUPP;
1148
1149         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1150                 return -EOPNOTSUPP;
1151
1152         IWL_DEBUG_MAC80211(priv, "enter\n");
1153         mutex_lock(&priv->mutex);
1154
1155         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1156                 /* mac80211 should not scan while ROC or ROC while scanning */
1157                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1158                         err = -EBUSY;
1159                         goto out;
1160                 }
1161
1162                 iwl_scan_cancel_timeout(priv, 100);
1163
1164                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1165                         err = -EBUSY;
1166                         goto out;
1167                 }
1168         }
1169
1170         priv->hw_roc_channel = channel;
1171         /* convert from ms to TU */
1172         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1173         priv->hw_roc_start_notified = false;
1174         cancel_delayed_work(&priv->hw_roc_disable_work);
1175
1176         if (!ctx->is_active) {
1177                 static const struct iwl_qos_info default_qos_data = {
1178                         .def_qos_parm = {
1179                                 .ac[0] = {
1180                                         .cw_min = cpu_to_le16(3),
1181                                         .cw_max = cpu_to_le16(7),
1182                                         .aifsn = 2,
1183                                         .edca_txop = cpu_to_le16(1504),
1184                                 },
1185                                 .ac[1] = {
1186                                         .cw_min = cpu_to_le16(7),
1187                                         .cw_max = cpu_to_le16(15),
1188                                         .aifsn = 2,
1189                                         .edca_txop = cpu_to_le16(3008),
1190                                 },
1191                                 .ac[2] = {
1192                                         .cw_min = cpu_to_le16(15),
1193                                         .cw_max = cpu_to_le16(1023),
1194                                         .aifsn = 3,
1195                                 },
1196                                 .ac[3] = {
1197                                         .cw_min = cpu_to_le16(15),
1198                                         .cw_max = cpu_to_le16(1023),
1199                                         .aifsn = 7,
1200                                 },
1201                         },
1202                 };
1203
1204                 ctx->is_active = true;
1205                 ctx->qos_data = default_qos_data;
1206                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1207                 memcpy(ctx->staging.node_addr,
1208                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1209                        ETH_ALEN);
1210                 memcpy(ctx->staging.bssid_addr,
1211                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1212                        ETH_ALEN);
1213                 err = iwlagn_commit_rxon(priv, ctx);
1214                 if (err)
1215                         goto out;
1216                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1217                                              RXON_FILTER_PROMISC_MSK |
1218                                              RXON_FILTER_CTL2HOST_MSK;
1219
1220                 err = iwlagn_commit_rxon(priv, ctx);
1221                 if (err) {
1222                         iwlagn_disable_roc(priv);
1223                         goto out;
1224                 }
1225                 priv->hw_roc_setup = true;
1226         }
1227
1228         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1229         if (err)
1230                 iwlagn_disable_roc(priv);
1231
1232  out:
1233         mutex_unlock(&priv->mutex);
1234         IWL_DEBUG_MAC80211(priv, "leave\n");
1235
1236         return err;
1237 }
1238
1239 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1240 {
1241         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1242
1243         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1244                 return -EOPNOTSUPP;
1245
1246         IWL_DEBUG_MAC80211(priv, "enter\n");
1247         mutex_lock(&priv->mutex);
1248         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1249         iwlagn_disable_roc(priv);
1250         mutex_unlock(&priv->mutex);
1251         IWL_DEBUG_MAC80211(priv, "leave\n");
1252
1253         return 0;
1254 }
1255
1256 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1257                                      struct ieee80211_vif *vif,
1258                                      enum ieee80211_rssi_event rssi_event)
1259 {
1260         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1261
1262         IWL_DEBUG_MAC80211(priv, "enter\n");
1263         mutex_lock(&priv->mutex);
1264
1265         if (priv->cfg->bt_params &&
1266                         priv->cfg->bt_params->advanced_bt_coexist) {
1267                 if (rssi_event == RSSI_EVENT_LOW)
1268                         priv->bt_enable_pspoll = true;
1269                 else if (rssi_event == RSSI_EVENT_HIGH)
1270                         priv->bt_enable_pspoll = false;
1271
1272                 iwlagn_send_advance_bt_config(priv);
1273         } else {
1274                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1275                                 "ignoring RSSI callback\n");
1276         }
1277
1278         mutex_unlock(&priv->mutex);
1279         IWL_DEBUG_MAC80211(priv, "leave\n");
1280 }
1281
1282 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1283                               struct ieee80211_sta *sta, bool set)
1284 {
1285         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1286
1287         queue_work(priv->workqueue, &priv->beacon_update);
1288
1289         return 0;
1290 }
1291
1292 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1293                               struct ieee80211_vif *vif, u16 queue,
1294                               const struct ieee80211_tx_queue_params *params)
1295 {
1296         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1297         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1298         struct iwl_rxon_context *ctx = vif_priv->ctx;
1299         int q;
1300
1301         if (WARN_ON(!ctx))
1302                 return -EINVAL;
1303
1304         IWL_DEBUG_MAC80211(priv, "enter\n");
1305
1306         if (!iwl_is_ready_rf(priv)) {
1307                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1308                 return -EIO;
1309         }
1310
1311         if (queue >= AC_NUM) {
1312                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1313                 return 0;
1314         }
1315
1316         q = AC_NUM - 1 - queue;
1317
1318         mutex_lock(&priv->mutex);
1319
1320         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1321                 cpu_to_le16(params->cw_min);
1322         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1323                 cpu_to_le16(params->cw_max);
1324         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1325         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1326                         cpu_to_le16((params->txop * 32));
1327
1328         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1329
1330         mutex_unlock(&priv->mutex);
1331
1332         IWL_DEBUG_MAC80211(priv, "leave\n");
1333         return 0;
1334 }
1335
1336 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1337 {
1338         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1339
1340         return priv->ibss_manager == IWL_IBSS_MANAGER;
1341 }
1342
1343 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1344 {
1345         iwl_connection_init_rx_config(priv, ctx);
1346
1347         iwlagn_set_rxon_chain(priv, ctx);
1348
1349         return iwlagn_commit_rxon(priv, ctx);
1350 }
1351
1352 static int iwl_setup_interface(struct iwl_priv *priv,
1353                                struct iwl_rxon_context *ctx)
1354 {
1355         struct ieee80211_vif *vif = ctx->vif;
1356         int err, ac;
1357
1358         lockdep_assert_held(&priv->mutex);
1359
1360         /*
1361          * This variable will be correct only when there's just
1362          * a single context, but all code using it is for hardware
1363          * that supports only one context.
1364          */
1365         priv->iw_mode = vif->type;
1366
1367         ctx->is_active = true;
1368
1369         err = iwl_set_mode(priv, ctx);
1370         if (err) {
1371                 if (!ctx->always_active)
1372                         ctx->is_active = false;
1373                 return err;
1374         }
1375
1376         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1377             vif->type == NL80211_IFTYPE_ADHOC) {
1378                 /*
1379                  * pretend to have high BT traffic as long as we
1380                  * are operating in IBSS mode, as this will cause
1381                  * the rate scaling etc. to behave as intended.
1382                  */
1383                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1384         }
1385
1386         /* set up queue mappings */
1387         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1388                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1389
1390         if (vif->type == NL80211_IFTYPE_AP)
1391                 vif->cab_queue = ctx->mcast_queue;
1392         else
1393                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1394
1395         return 0;
1396 }
1397
1398 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1399                                     struct ieee80211_vif *vif)
1400 {
1401         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1402         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1403         struct iwl_rxon_context *tmp, *ctx = NULL;
1404         int err;
1405         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1406         bool reset = false;
1407
1408         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1409                            viftype, vif->addr);
1410
1411         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1412
1413         mutex_lock(&priv->mutex);
1414
1415         iwlagn_disable_roc(priv);
1416
1417         if (!iwl_is_ready_rf(priv)) {
1418                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1419                 err = -EINVAL;
1420                 goto out;
1421         }
1422
1423         for_each_context(priv, tmp) {
1424                 u32 possible_modes =
1425                         tmp->interface_modes | tmp->exclusive_interface_modes;
1426
1427                 if (tmp->vif) {
1428                         /* On reset we need to add the same interface again */
1429                         if (tmp->vif == vif) {
1430                                 reset = true;
1431                                 ctx = tmp;
1432                                 break;
1433                         }
1434
1435                         /* check if this busy context is exclusive */
1436                         if (tmp->exclusive_interface_modes &
1437                                                 BIT(tmp->vif->type)) {
1438                                 err = -EINVAL;
1439                                 goto out;
1440                         }
1441                         continue;
1442                 }
1443
1444                 if (!(possible_modes & BIT(viftype)))
1445                         continue;
1446
1447                 /* have maybe usable context w/o interface */
1448                 ctx = tmp;
1449                 break;
1450         }
1451
1452         if (!ctx) {
1453                 err = -EOPNOTSUPP;
1454                 goto out;
1455         }
1456
1457         vif_priv->ctx = ctx;
1458         ctx->vif = vif;
1459
1460         /*
1461          * In SNIFFER device type, the firmware reports the FCS to
1462          * the host, rather than snipping it off. Unfortunately,
1463          * mac80211 doesn't (yet) provide a per-packet flag for
1464          * this, so that we have to set the hardware flag based
1465          * on the interfaces added. As the monitor interface can
1466          * only be present by itself, and will be removed before
1467          * other interfaces are added, this is safe.
1468          */
1469         if (vif->type == NL80211_IFTYPE_MONITOR)
1470                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1471         else
1472                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1473
1474         err = iwl_setup_interface(priv, ctx);
1475         if (!err || reset)
1476                 goto out;
1477
1478         ctx->vif = NULL;
1479         priv->iw_mode = NL80211_IFTYPE_STATION;
1480  out:
1481         mutex_unlock(&priv->mutex);
1482
1483         IWL_DEBUG_MAC80211(priv, "leave\n");
1484         return err;
1485 }
1486
1487 static void iwl_teardown_interface(struct iwl_priv *priv,
1488                                    struct ieee80211_vif *vif,
1489                                    bool mode_change)
1490 {
1491         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1492
1493         lockdep_assert_held(&priv->mutex);
1494
1495         if (priv->scan_vif == vif) {
1496                 iwl_scan_cancel_timeout(priv, 200);
1497                 iwl_force_scan_end(priv);
1498         }
1499
1500         if (!mode_change) {
1501                 iwl_set_mode(priv, ctx);
1502                 if (!ctx->always_active)
1503                         ctx->is_active = false;
1504         }
1505
1506         /*
1507          * When removing the IBSS interface, overwrite the
1508          * BT traffic load with the stored one from the last
1509          * notification, if any. If this is a device that
1510          * doesn't implement this, this has no effect since
1511          * both values are the same and zero.
1512          */
1513         if (vif->type == NL80211_IFTYPE_ADHOC)
1514                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1515 }
1516
1517 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1518                               struct ieee80211_vif *vif)
1519 {
1520         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1521         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1522
1523         IWL_DEBUG_MAC80211(priv, "enter\n");
1524
1525         mutex_lock(&priv->mutex);
1526
1527         if (WARN_ON(ctx->vif != vif)) {
1528                 struct iwl_rxon_context *tmp;
1529                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1530                 for_each_context(priv, tmp)
1531                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1532                                 tmp->ctxid, tmp, tmp->vif);
1533         }
1534         ctx->vif = NULL;
1535
1536         iwl_teardown_interface(priv, vif, false);
1537
1538         mutex_unlock(&priv->mutex);
1539
1540         IWL_DEBUG_MAC80211(priv, "leave\n");
1541
1542 }
1543
1544 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1545                                        struct ieee80211_vif *vif,
1546                                        enum nl80211_iftype newtype, bool newp2p)
1547 {
1548         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1549         struct iwl_rxon_context *ctx, *tmp;
1550         enum nl80211_iftype newviftype = newtype;
1551         u32 interface_modes;
1552         int err;
1553
1554         IWL_DEBUG_MAC80211(priv, "enter\n");
1555
1556         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1557
1558         mutex_lock(&priv->mutex);
1559
1560         ctx = iwl_rxon_ctx_from_vif(vif);
1561
1562         /*
1563          * To simplify this code, only support changes on the
1564          * BSS context. The PAN context is usually reassigned
1565          * by creating/removing P2P interfaces anyway.
1566          */
1567         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1568                 err = -EBUSY;
1569                 goto out;
1570         }
1571
1572         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1573                 /*
1574                  * Huh? But wait ... this can maybe happen when
1575                  * we're in the middle of a firmware restart!
1576                  */
1577                 err = -EBUSY;
1578                 goto out;
1579         }
1580
1581         /* Check if the switch is supported in the same context */
1582         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1583         if (!(interface_modes & BIT(newtype))) {
1584                 err = -EBUSY;
1585                 goto out;
1586         }
1587
1588         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1589                 for_each_context(priv, tmp) {
1590                         if (ctx == tmp)
1591                                 continue;
1592
1593                         if (!tmp->is_active)
1594                                 continue;
1595
1596                         /*
1597                          * The current mode switch would be exclusive, but
1598                          * another context is active ... refuse the switch.
1599                          */
1600                         err = -EBUSY;
1601                         goto out;
1602                 }
1603         }
1604
1605         /* success */
1606         iwl_teardown_interface(priv, vif, true);
1607         vif->type = newviftype;
1608         vif->p2p = newp2p;
1609         err = iwl_setup_interface(priv, ctx);
1610         WARN_ON(err);
1611         /*
1612          * We've switched internally, but submitting to the
1613          * device may have failed for some reason. Mask this
1614          * error, because otherwise mac80211 will not switch
1615          * (and set the interface type back) and we'll be
1616          * out of sync with it.
1617          */
1618         err = 0;
1619
1620  out:
1621         mutex_unlock(&priv->mutex);
1622         IWL_DEBUG_MAC80211(priv, "leave\n");
1623
1624         return err;
1625 }
1626
1627 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1628                               struct ieee80211_vif *vif,
1629                               struct cfg80211_scan_request *req)
1630 {
1631         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1632         int ret;
1633
1634         IWL_DEBUG_MAC80211(priv, "enter\n");
1635
1636         if (req->n_channels == 0)
1637                 return -EINVAL;
1638
1639         mutex_lock(&priv->mutex);
1640
1641         /*
1642          * If an internal scan is in progress, just set
1643          * up the scan_request as per above.
1644          */
1645         if (priv->scan_type != IWL_SCAN_NORMAL) {
1646                 IWL_DEBUG_SCAN(priv,
1647                                "SCAN request during internal scan - defer\n");
1648                 priv->scan_request = req;
1649                 priv->scan_vif = vif;
1650                 ret = 0;
1651         } else {
1652                 priv->scan_request = req;
1653                 priv->scan_vif = vif;
1654                 /*
1655                  * mac80211 will only ask for one band at a time
1656                  * so using channels[0] here is ok
1657                  */
1658                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1659                                         req->channels[0]->band);
1660                 if (ret) {
1661                         priv->scan_request = NULL;
1662                         priv->scan_vif = NULL;
1663                 }
1664         }
1665
1666         IWL_DEBUG_MAC80211(priv, "leave\n");
1667
1668         mutex_unlock(&priv->mutex);
1669
1670         return ret;
1671 }
1672
1673 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1674 {
1675         struct iwl_addsta_cmd cmd = {
1676                 .mode = STA_CONTROL_MODIFY_MSK,
1677                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1678                 .sta.sta_id = sta_id,
1679         };
1680
1681         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1682 }
1683
1684 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1685                                   struct ieee80211_vif *vif,
1686                                   enum sta_notify_cmd cmd,
1687                                   struct ieee80211_sta *sta)
1688 {
1689         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1690         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1691         int sta_id;
1692
1693         IWL_DEBUG_MAC80211(priv, "enter\n");
1694
1695         switch (cmd) {
1696         case STA_NOTIFY_SLEEP:
1697                 WARN_ON(!sta_priv->client);
1698                 sta_priv->asleep = true;
1699                 if (atomic_read(&sta_priv->pending_frames) > 0)
1700                         ieee80211_sta_block_awake(hw, sta, true);
1701                 break;
1702         case STA_NOTIFY_AWAKE:
1703                 WARN_ON(!sta_priv->client);
1704                 if (!sta_priv->asleep)
1705                         break;
1706                 sta_priv->asleep = false;
1707                 sta_id = iwl_sta_id(sta);
1708                 if (sta_id != IWL_INVALID_STATION)
1709                         iwl_sta_modify_ps_wake(priv, sta_id);
1710                 break;
1711         default:
1712                 break;
1713         }
1714         IWL_DEBUG_MAC80211(priv, "leave\n");
1715 }
1716
1717 struct ieee80211_ops iwlagn_hw_ops = {
1718         .tx = iwlagn_mac_tx,
1719         .start = iwlagn_mac_start,
1720         .stop = iwlagn_mac_stop,
1721 #ifdef CONFIG_PM_SLEEP
1722         .suspend = iwlagn_mac_suspend,
1723         .resume = iwlagn_mac_resume,
1724         .set_wakeup = iwlagn_mac_set_wakeup,
1725 #endif
1726         .add_interface = iwlagn_mac_add_interface,
1727         .remove_interface = iwlagn_mac_remove_interface,
1728         .change_interface = iwlagn_mac_change_interface,
1729         .config = iwlagn_mac_config,
1730         .configure_filter = iwlagn_configure_filter,
1731         .set_key = iwlagn_mac_set_key,
1732         .update_tkip_key = iwlagn_mac_update_tkip_key,
1733         .set_rekey_data = iwlagn_mac_set_rekey_data,
1734         .conf_tx = iwlagn_mac_conf_tx,
1735         .bss_info_changed = iwlagn_bss_info_changed,
1736         .ampdu_action = iwlagn_mac_ampdu_action,
1737         .hw_scan = iwlagn_mac_hw_scan,
1738         .sta_notify = iwlagn_mac_sta_notify,
1739         .sta_state = iwlagn_mac_sta_state,
1740         .channel_switch = iwlagn_mac_channel_switch,
1741         .flush = iwlagn_mac_flush,
1742         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1743         .remain_on_channel = iwlagn_mac_remain_on_channel,
1744         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1745         .rssi_callback = iwlagn_mac_rssi_callback,
1746         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1747         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1748         .set_tim = iwlagn_mac_set_tim,
1749 };
1750
1751 /* This function both allocates and initializes hw and priv. */
1752 struct ieee80211_hw *iwl_alloc_all(void)
1753 {
1754         struct iwl_priv *priv;
1755         struct iwl_op_mode *op_mode;
1756         /* mac80211 allocates memory for this device instance, including
1757          *   space for this driver's private structure */
1758         struct ieee80211_hw *hw;
1759
1760         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1761                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1762         if (!hw)
1763                 goto out;
1764
1765         op_mode = hw->priv;
1766         priv = IWL_OP_MODE_GET_DVM(op_mode);
1767         priv->hw = hw;
1768
1769 out:
1770         return hw;
1771 }