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                                      enum ieee80211_roc_type type)
1142 {
1143         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1144         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1145         int err = 0;
1146
1147         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1148                 return -EOPNOTSUPP;
1149
1150         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1151                 return -EOPNOTSUPP;
1152
1153         IWL_DEBUG_MAC80211(priv, "enter\n");
1154         mutex_lock(&priv->mutex);
1155
1156         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1157                 /* mac80211 should not scan while ROC or ROC while scanning */
1158                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1159                         err = -EBUSY;
1160                         goto out;
1161                 }
1162
1163                 iwl_scan_cancel_timeout(priv, 100);
1164
1165                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1166                         err = -EBUSY;
1167                         goto out;
1168                 }
1169         }
1170
1171         priv->hw_roc_channel = channel;
1172         /* convert from ms to TU */
1173         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1174         priv->hw_roc_start_notified = false;
1175         cancel_delayed_work(&priv->hw_roc_disable_work);
1176
1177         if (!ctx->is_active) {
1178                 static const struct iwl_qos_info default_qos_data = {
1179                         .def_qos_parm = {
1180                                 .ac[0] = {
1181                                         .cw_min = cpu_to_le16(3),
1182                                         .cw_max = cpu_to_le16(7),
1183                                         .aifsn = 2,
1184                                         .edca_txop = cpu_to_le16(1504),
1185                                 },
1186                                 .ac[1] = {
1187                                         .cw_min = cpu_to_le16(7),
1188                                         .cw_max = cpu_to_le16(15),
1189                                         .aifsn = 2,
1190                                         .edca_txop = cpu_to_le16(3008),
1191                                 },
1192                                 .ac[2] = {
1193                                         .cw_min = cpu_to_le16(15),
1194                                         .cw_max = cpu_to_le16(1023),
1195                                         .aifsn = 3,
1196                                 },
1197                                 .ac[3] = {
1198                                         .cw_min = cpu_to_le16(15),
1199                                         .cw_max = cpu_to_le16(1023),
1200                                         .aifsn = 7,
1201                                 },
1202                         },
1203                 };
1204
1205                 ctx->is_active = true;
1206                 ctx->qos_data = default_qos_data;
1207                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1208                 memcpy(ctx->staging.node_addr,
1209                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1210                        ETH_ALEN);
1211                 memcpy(ctx->staging.bssid_addr,
1212                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1213                        ETH_ALEN);
1214                 err = iwlagn_commit_rxon(priv, ctx);
1215                 if (err)
1216                         goto out;
1217                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1218                                              RXON_FILTER_PROMISC_MSK |
1219                                              RXON_FILTER_CTL2HOST_MSK;
1220
1221                 err = iwlagn_commit_rxon(priv, ctx);
1222                 if (err) {
1223                         iwlagn_disable_roc(priv);
1224                         goto out;
1225                 }
1226                 priv->hw_roc_setup = true;
1227         }
1228
1229         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1230         if (err)
1231                 iwlagn_disable_roc(priv);
1232
1233  out:
1234         mutex_unlock(&priv->mutex);
1235         IWL_DEBUG_MAC80211(priv, "leave\n");
1236
1237         return err;
1238 }
1239
1240 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1241 {
1242         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1243
1244         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1245                 return -EOPNOTSUPP;
1246
1247         IWL_DEBUG_MAC80211(priv, "enter\n");
1248         mutex_lock(&priv->mutex);
1249         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1250         iwlagn_disable_roc(priv);
1251         mutex_unlock(&priv->mutex);
1252         IWL_DEBUG_MAC80211(priv, "leave\n");
1253
1254         return 0;
1255 }
1256
1257 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1258                                      struct ieee80211_vif *vif,
1259                                      enum ieee80211_rssi_event rssi_event)
1260 {
1261         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1262
1263         IWL_DEBUG_MAC80211(priv, "enter\n");
1264         mutex_lock(&priv->mutex);
1265
1266         if (priv->cfg->bt_params &&
1267                         priv->cfg->bt_params->advanced_bt_coexist) {
1268                 if (rssi_event == RSSI_EVENT_LOW)
1269                         priv->bt_enable_pspoll = true;
1270                 else if (rssi_event == RSSI_EVENT_HIGH)
1271                         priv->bt_enable_pspoll = false;
1272
1273                 iwlagn_send_advance_bt_config(priv);
1274         } else {
1275                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1276                                 "ignoring RSSI callback\n");
1277         }
1278
1279         mutex_unlock(&priv->mutex);
1280         IWL_DEBUG_MAC80211(priv, "leave\n");
1281 }
1282
1283 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1284                               struct ieee80211_sta *sta, bool set)
1285 {
1286         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1287
1288         queue_work(priv->workqueue, &priv->beacon_update);
1289
1290         return 0;
1291 }
1292
1293 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1294                               struct ieee80211_vif *vif, u16 queue,
1295                               const struct ieee80211_tx_queue_params *params)
1296 {
1297         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1298         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1299         struct iwl_rxon_context *ctx = vif_priv->ctx;
1300         int q;
1301
1302         if (WARN_ON(!ctx))
1303                 return -EINVAL;
1304
1305         IWL_DEBUG_MAC80211(priv, "enter\n");
1306
1307         if (!iwl_is_ready_rf(priv)) {
1308                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1309                 return -EIO;
1310         }
1311
1312         if (queue >= AC_NUM) {
1313                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1314                 return 0;
1315         }
1316
1317         q = AC_NUM - 1 - queue;
1318
1319         mutex_lock(&priv->mutex);
1320
1321         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1322                 cpu_to_le16(params->cw_min);
1323         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1324                 cpu_to_le16(params->cw_max);
1325         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1326         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1327                         cpu_to_le16((params->txop * 32));
1328
1329         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1330
1331         mutex_unlock(&priv->mutex);
1332
1333         IWL_DEBUG_MAC80211(priv, "leave\n");
1334         return 0;
1335 }
1336
1337 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1338 {
1339         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1340
1341         return priv->ibss_manager == IWL_IBSS_MANAGER;
1342 }
1343
1344 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1345 {
1346         iwl_connection_init_rx_config(priv, ctx);
1347
1348         iwlagn_set_rxon_chain(priv, ctx);
1349
1350         return iwlagn_commit_rxon(priv, ctx);
1351 }
1352
1353 static int iwl_setup_interface(struct iwl_priv *priv,
1354                                struct iwl_rxon_context *ctx)
1355 {
1356         struct ieee80211_vif *vif = ctx->vif;
1357         int err, ac;
1358
1359         lockdep_assert_held(&priv->mutex);
1360
1361         /*
1362          * This variable will be correct only when there's just
1363          * a single context, but all code using it is for hardware
1364          * that supports only one context.
1365          */
1366         priv->iw_mode = vif->type;
1367
1368         ctx->is_active = true;
1369
1370         err = iwl_set_mode(priv, ctx);
1371         if (err) {
1372                 if (!ctx->always_active)
1373                         ctx->is_active = false;
1374                 return err;
1375         }
1376
1377         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1378             vif->type == NL80211_IFTYPE_ADHOC) {
1379                 /*
1380                  * pretend to have high BT traffic as long as we
1381                  * are operating in IBSS mode, as this will cause
1382                  * the rate scaling etc. to behave as intended.
1383                  */
1384                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1385         }
1386
1387         /* set up queue mappings */
1388         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1389                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1390
1391         if (vif->type == NL80211_IFTYPE_AP)
1392                 vif->cab_queue = ctx->mcast_queue;
1393         else
1394                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1395
1396         return 0;
1397 }
1398
1399 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1400                                     struct ieee80211_vif *vif)
1401 {
1402         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1403         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1404         struct iwl_rxon_context *tmp, *ctx = NULL;
1405         int err;
1406         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1407         bool reset = false;
1408
1409         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1410                            viftype, vif->addr);
1411
1412         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1413
1414         mutex_lock(&priv->mutex);
1415
1416         iwlagn_disable_roc(priv);
1417
1418         if (!iwl_is_ready_rf(priv)) {
1419                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1420                 err = -EINVAL;
1421                 goto out;
1422         }
1423
1424         for_each_context(priv, tmp) {
1425                 u32 possible_modes =
1426                         tmp->interface_modes | tmp->exclusive_interface_modes;
1427
1428                 if (tmp->vif) {
1429                         /* On reset we need to add the same interface again */
1430                         if (tmp->vif == vif) {
1431                                 reset = true;
1432                                 ctx = tmp;
1433                                 break;
1434                         }
1435
1436                         /* check if this busy context is exclusive */
1437                         if (tmp->exclusive_interface_modes &
1438                                                 BIT(tmp->vif->type)) {
1439                                 err = -EINVAL;
1440                                 goto out;
1441                         }
1442                         continue;
1443                 }
1444
1445                 if (!(possible_modes & BIT(viftype)))
1446                         continue;
1447
1448                 /* have maybe usable context w/o interface */
1449                 ctx = tmp;
1450                 break;
1451         }
1452
1453         if (!ctx) {
1454                 err = -EOPNOTSUPP;
1455                 goto out;
1456         }
1457
1458         vif_priv->ctx = ctx;
1459         ctx->vif = vif;
1460
1461         /*
1462          * In SNIFFER device type, the firmware reports the FCS to
1463          * the host, rather than snipping it off. Unfortunately,
1464          * mac80211 doesn't (yet) provide a per-packet flag for
1465          * this, so that we have to set the hardware flag based
1466          * on the interfaces added. As the monitor interface can
1467          * only be present by itself, and will be removed before
1468          * other interfaces are added, this is safe.
1469          */
1470         if (vif->type == NL80211_IFTYPE_MONITOR)
1471                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1472         else
1473                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1474
1475         err = iwl_setup_interface(priv, ctx);
1476         if (!err || reset)
1477                 goto out;
1478
1479         ctx->vif = NULL;
1480         priv->iw_mode = NL80211_IFTYPE_STATION;
1481  out:
1482         mutex_unlock(&priv->mutex);
1483
1484         IWL_DEBUG_MAC80211(priv, "leave\n");
1485         return err;
1486 }
1487
1488 static void iwl_teardown_interface(struct iwl_priv *priv,
1489                                    struct ieee80211_vif *vif,
1490                                    bool mode_change)
1491 {
1492         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1493
1494         lockdep_assert_held(&priv->mutex);
1495
1496         if (priv->scan_vif == vif) {
1497                 iwl_scan_cancel_timeout(priv, 200);
1498                 iwl_force_scan_end(priv);
1499         }
1500
1501         if (!mode_change) {
1502                 iwl_set_mode(priv, ctx);
1503                 if (!ctx->always_active)
1504                         ctx->is_active = false;
1505         }
1506
1507         /*
1508          * When removing the IBSS interface, overwrite the
1509          * BT traffic load with the stored one from the last
1510          * notification, if any. If this is a device that
1511          * doesn't implement this, this has no effect since
1512          * both values are the same and zero.
1513          */
1514         if (vif->type == NL80211_IFTYPE_ADHOC)
1515                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1516 }
1517
1518 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1519                               struct ieee80211_vif *vif)
1520 {
1521         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1522         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1523
1524         IWL_DEBUG_MAC80211(priv, "enter\n");
1525
1526         mutex_lock(&priv->mutex);
1527
1528         if (WARN_ON(ctx->vif != vif)) {
1529                 struct iwl_rxon_context *tmp;
1530                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1531                 for_each_context(priv, tmp)
1532                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1533                                 tmp->ctxid, tmp, tmp->vif);
1534         }
1535         ctx->vif = NULL;
1536
1537         iwl_teardown_interface(priv, vif, false);
1538
1539         mutex_unlock(&priv->mutex);
1540
1541         IWL_DEBUG_MAC80211(priv, "leave\n");
1542
1543 }
1544
1545 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1546                                        struct ieee80211_vif *vif,
1547                                        enum nl80211_iftype newtype, bool newp2p)
1548 {
1549         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1550         struct iwl_rxon_context *ctx, *tmp;
1551         enum nl80211_iftype newviftype = newtype;
1552         u32 interface_modes;
1553         int err;
1554
1555         IWL_DEBUG_MAC80211(priv, "enter\n");
1556
1557         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1558
1559         mutex_lock(&priv->mutex);
1560
1561         ctx = iwl_rxon_ctx_from_vif(vif);
1562
1563         /*
1564          * To simplify this code, only support changes on the
1565          * BSS context. The PAN context is usually reassigned
1566          * by creating/removing P2P interfaces anyway.
1567          */
1568         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1569                 err = -EBUSY;
1570                 goto out;
1571         }
1572
1573         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1574                 /*
1575                  * Huh? But wait ... this can maybe happen when
1576                  * we're in the middle of a firmware restart!
1577                  */
1578                 err = -EBUSY;
1579                 goto out;
1580         }
1581
1582         /* Check if the switch is supported in the same context */
1583         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1584         if (!(interface_modes & BIT(newtype))) {
1585                 err = -EBUSY;
1586                 goto out;
1587         }
1588
1589         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1590                 for_each_context(priv, tmp) {
1591                         if (ctx == tmp)
1592                                 continue;
1593
1594                         if (!tmp->is_active)
1595                                 continue;
1596
1597                         /*
1598                          * The current mode switch would be exclusive, but
1599                          * another context is active ... refuse the switch.
1600                          */
1601                         err = -EBUSY;
1602                         goto out;
1603                 }
1604         }
1605
1606         /* success */
1607         iwl_teardown_interface(priv, vif, true);
1608         vif->type = newviftype;
1609         vif->p2p = newp2p;
1610         err = iwl_setup_interface(priv, ctx);
1611         WARN_ON(err);
1612         /*
1613          * We've switched internally, but submitting to the
1614          * device may have failed for some reason. Mask this
1615          * error, because otherwise mac80211 will not switch
1616          * (and set the interface type back) and we'll be
1617          * out of sync with it.
1618          */
1619         err = 0;
1620
1621  out:
1622         mutex_unlock(&priv->mutex);
1623         IWL_DEBUG_MAC80211(priv, "leave\n");
1624
1625         return err;
1626 }
1627
1628 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1629                               struct ieee80211_vif *vif,
1630                               struct cfg80211_scan_request *req)
1631 {
1632         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1633         int ret;
1634
1635         IWL_DEBUG_MAC80211(priv, "enter\n");
1636
1637         if (req->n_channels == 0)
1638                 return -EINVAL;
1639
1640         mutex_lock(&priv->mutex);
1641
1642         /*
1643          * If an internal scan is in progress, just set
1644          * up the scan_request as per above.
1645          */
1646         if (priv->scan_type != IWL_SCAN_NORMAL) {
1647                 IWL_DEBUG_SCAN(priv,
1648                                "SCAN request during internal scan - defer\n");
1649                 priv->scan_request = req;
1650                 priv->scan_vif = vif;
1651                 ret = 0;
1652         } else {
1653                 priv->scan_request = req;
1654                 priv->scan_vif = vif;
1655                 /*
1656                  * mac80211 will only ask for one band at a time
1657                  * so using channels[0] here is ok
1658                  */
1659                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1660                                         req->channels[0]->band);
1661                 if (ret) {
1662                         priv->scan_request = NULL;
1663                         priv->scan_vif = NULL;
1664                 }
1665         }
1666
1667         IWL_DEBUG_MAC80211(priv, "leave\n");
1668
1669         mutex_unlock(&priv->mutex);
1670
1671         return ret;
1672 }
1673
1674 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1675 {
1676         struct iwl_addsta_cmd cmd = {
1677                 .mode = STA_CONTROL_MODIFY_MSK,
1678                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1679                 .sta.sta_id = sta_id,
1680         };
1681
1682         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1683 }
1684
1685 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1686                                   struct ieee80211_vif *vif,
1687                                   enum sta_notify_cmd cmd,
1688                                   struct ieee80211_sta *sta)
1689 {
1690         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1691         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1692         int sta_id;
1693
1694         IWL_DEBUG_MAC80211(priv, "enter\n");
1695
1696         switch (cmd) {
1697         case STA_NOTIFY_SLEEP:
1698                 WARN_ON(!sta_priv->client);
1699                 sta_priv->asleep = true;
1700                 if (atomic_read(&sta_priv->pending_frames) > 0)
1701                         ieee80211_sta_block_awake(hw, sta, true);
1702                 break;
1703         case STA_NOTIFY_AWAKE:
1704                 WARN_ON(!sta_priv->client);
1705                 if (!sta_priv->asleep)
1706                         break;
1707                 sta_priv->asleep = false;
1708                 sta_id = iwl_sta_id(sta);
1709                 if (sta_id != IWL_INVALID_STATION)
1710                         iwl_sta_modify_ps_wake(priv, sta_id);
1711                 break;
1712         default:
1713                 break;
1714         }
1715         IWL_DEBUG_MAC80211(priv, "leave\n");
1716 }
1717
1718 struct ieee80211_ops iwlagn_hw_ops = {
1719         .tx = iwlagn_mac_tx,
1720         .start = iwlagn_mac_start,
1721         .stop = iwlagn_mac_stop,
1722 #ifdef CONFIG_PM_SLEEP
1723         .suspend = iwlagn_mac_suspend,
1724         .resume = iwlagn_mac_resume,
1725         .set_wakeup = iwlagn_mac_set_wakeup,
1726 #endif
1727         .add_interface = iwlagn_mac_add_interface,
1728         .remove_interface = iwlagn_mac_remove_interface,
1729         .change_interface = iwlagn_mac_change_interface,
1730         .config = iwlagn_mac_config,
1731         .configure_filter = iwlagn_configure_filter,
1732         .set_key = iwlagn_mac_set_key,
1733         .update_tkip_key = iwlagn_mac_update_tkip_key,
1734         .set_rekey_data = iwlagn_mac_set_rekey_data,
1735         .conf_tx = iwlagn_mac_conf_tx,
1736         .bss_info_changed = iwlagn_bss_info_changed,
1737         .ampdu_action = iwlagn_mac_ampdu_action,
1738         .hw_scan = iwlagn_mac_hw_scan,
1739         .sta_notify = iwlagn_mac_sta_notify,
1740         .sta_state = iwlagn_mac_sta_state,
1741         .channel_switch = iwlagn_mac_channel_switch,
1742         .flush = iwlagn_mac_flush,
1743         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1744         .remain_on_channel = iwlagn_mac_remain_on_channel,
1745         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1746         .rssi_callback = iwlagn_mac_rssi_callback,
1747         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1748         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1749         .set_tim = iwlagn_mac_set_tim,
1750 };
1751
1752 /* This function both allocates and initializes hw and priv. */
1753 struct ieee80211_hw *iwl_alloc_all(void)
1754 {
1755         struct iwl_priv *priv;
1756         struct iwl_op_mode *op_mode;
1757         /* mac80211 allocates memory for this device instance, including
1758          *   space for this driver's private structure */
1759         struct ieee80211_hw *hw;
1760
1761         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1762                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1763         if (!hw)
1764                 goto out;
1765
1766         op_mode = hw->priv;
1767         priv = IWL_OP_MODE_GET_DVM(op_mode);
1768         priv->hw = hw;
1769
1770 out:
1771         return hw;
1772 }