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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   4  * Copyright (C) 2018 Intel Corporation
   5  *
   6  * Portions of this file are derived from the ipw3945 project, as well
   7  * as portions of the ieee80211 subsystem header files.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  *  Intel Linux Wireless <linuxwifi@intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/slab.h>
  29 #include <linux/dma-mapping.h>
  30 #include <linux/delay.h>
  31 #include <linux/sched.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/if_arp.h>
  36
  37 #include <net/ieee80211_radiotap.h>
  38 #include <net/mac80211.h>
  39
  40 #include <asm/div64.h>
  41
  42 #include "iwl-io.h"
  43 #include "iwl-trans.h"
  44 #include "iwl-op-mode.h"
  45 #include "iwl-modparams.h"
  46
  47 #include "dev.h"
  48 #include "calib.h"
  49 #include "agn.h"
  50
  51 /*****************************************************************************
  52  *
  53  * mac80211 entry point functions
  54  *
  55  *****************************************************************************/
  56
  57 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  58         {
  59                 .max = 1,
  60                 .types = BIT(NL80211_IFTYPE_STATION),
  61         },
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_AP),
  65         },
  66 };
  67
  68 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  69         {
  70                 .max = 2,
  71                 .types = BIT(NL80211_IFTYPE_STATION),
  72         },
  73 };
  74
  75 static const struct ieee80211_iface_combination
  76 iwlagn_iface_combinations_dualmode[] = {
  77         { .num_different_channels = 1,
  78           .max_interfaces = 2,
  79           .beacon_int_infra_match = true,
  80           .limits = iwlagn_sta_ap_limits,
  81           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  82         },
  83         { .num_different_channels = 1,
  84           .max_interfaces = 2,
  85           .limits = iwlagn_2sta_limits,
  86           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  87         },
  88 };
  89
  90 /*
  91  * Not a mac80211 entry point function, but it fits in with all the
  92  * other mac80211 functions grouped here.
  93  */
  94 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  95                               const struct iwl_ucode_capabilities *capa)
  96 {
  97         int ret;
  98         struct ieee80211_hw *hw = priv->hw;
  99         struct iwl_rxon_context *ctx;
 100
 101         hw->rate_control_algorithm = "iwl-agn-rs";
 102
 103         /* Tell mac80211 our characteristics */
 104         ieee80211_hw_set(hw, SIGNAL_DBM);
 105         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 106         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
 107         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 108         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 109         ieee80211_hw_set(hw, QUEUE_CONTROL);
 110         ieee80211_hw_set(hw, SUPPORTS_PS);
 111         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 112         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 113         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 114
 115         if (priv->trans->max_skb_frags)
 116                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 117
 118         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 119         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 120
 121         /*
 122          * Including the following line will crash some AP's.  This
 123          * workaround removes the stimulus which causes the crash until
 124          * the AP software can be fixed.
 125         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 126          */
 127
 128         if (priv->nvm_data->sku_cap_11n_enable)
 129                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 130                                        NL80211_FEATURE_STATIC_SMPS;
 131
 132         /*
 133          * Enable 11w if advertised by firmware and software crypto
 134          * is not enabled (as the firmware will interpret some mgmt
 135          * packets, so enabling it with software crypto isn't safe)
 136          */
 137         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 138             !iwlwifi_mod_params.swcrypto)
 139                 ieee80211_hw_set(hw, MFP_CAPABLE);
 140
 141         hw->sta_data_size = sizeof(struct iwl_station_priv);
 142         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 143
 144         for_each_context(priv, ctx) {
 145                 hw->wiphy->interface_modes |= ctx->interface_modes;
 146                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 147         }
 148
 149         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 150
 151         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 152                 hw->wiphy->iface_combinations =
 153                         iwlagn_iface_combinations_dualmode;
 154                 hw->wiphy->n_iface_combinations =
 155                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 156         }
 157
 158         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 159         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 160                                        REGULATORY_DISABLE_BEACON_HINTS;
 161
 162 #ifdef CONFIG_PM_SLEEP
 163         if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
 164             priv->trans->ops->d3_suspend &&
 165             priv->trans->ops->d3_resume &&
 166             device_can_wakeup(priv->trans->dev)) {
 167                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 168                                              WIPHY_WOWLAN_DISCONNECT |
 169                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 170                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 171                 if (!iwlwifi_mod_params.swcrypto)
 172                         priv->wowlan_support.flags |=
 173                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 174                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 175
 176                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 177                 priv->wowlan_support.pattern_min_len =
 178                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 179                 priv->wowlan_support.pattern_max_len =
 180                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 181                 hw->wiphy->wowlan = &priv->wowlan_support;
 182         }
 183 #endif
 184
 185         if (iwlwifi_mod_params.power_save)
 186                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 187         else
 188                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 189
 190         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 191         /* we create the 802.11 header and a max-length SSID element */
 192         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 193
 194         /*
 195          * We don't use all queues: 4 and 9 are unused and any
 196          * aggregation queue gets mapped down to the AC queue.
 197          */
 198         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 199
 200         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 201
 202         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 203                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 204                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 205         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 206                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 207                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 208
 209         hw->wiphy->hw_version = priv->trans->hw_id;
 210
 211         iwl_leds_init(priv);
 212
 213         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 214
 215         ret = ieee80211_register_hw(priv->hw);
 216         if (ret) {
 217                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 218                 iwl_leds_exit(priv);
 219                 return ret;
 220         }
 221         priv->mac80211_registered = 1;
 222
 223         return 0;
 224 }
 225
 226 void iwlagn_mac_unregister(struct iwl_priv *priv)
 227 {
 228         if (!priv->mac80211_registered)
 229                 return;
 230         iwl_leds_exit(priv);
 231         ieee80211_unregister_hw(priv->hw);
 232         priv->mac80211_registered = 0;
 233 }
 234
 235 static int __iwl_up(struct iwl_priv *priv)
 236 {
 237         struct iwl_rxon_context *ctx;
 238         int ret;
 239
 240         lockdep_assert_held(&priv->mutex);
 241
 242         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 243                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 244                 return -EIO;
 245         }
 246
 247         for_each_context(priv, ctx) {
 248                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 249                 if (ret) {
 250                         iwl_dealloc_bcast_stations(priv);
 251                         return ret;
 252                 }
 253         }
 254
 255         ret = iwl_trans_start_hw(priv->trans);
 256         if (ret) {
 257                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 258                 goto error;
 259         }
 260
 261         ret = iwl_run_init_ucode(priv);
 262         if (ret) {
 263                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 264                 goto error;
 265         }
 266
 267         ret = iwl_trans_start_hw(priv->trans);
 268         if (ret) {
 269                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 270                 goto error;
 271         }
 272
 273         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 274         if (ret) {
 275                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 276                 goto error;
 277         }
 278
 279         ret = iwl_alive_start(priv);
 280         if (ret)
 281                 goto error;
 282         return 0;
 283
 284  error:
 285         set_bit(STATUS_EXIT_PENDING, &priv->status);
 286         iwl_down(priv);
 287         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 288
 289         IWL_ERR(priv, "Unable to initialize device.\n");
 290         return ret;
 291 }
 292
 293 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 294 {
 295         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 296         int ret;
 297
 298         IWL_DEBUG_MAC80211(priv, "enter\n");
 299
 300         /* we should be verifying the device is ready to be opened */
 301         mutex_lock(&priv->mutex);
 302         ret = __iwl_up(priv);
 303         mutex_unlock(&priv->mutex);
 304         if (ret)
 305                 return ret;
 306
 307         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 308
 309         /* Now we should be done, and the READY bit should be set. */
 310         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 311                 ret = -EIO;
 312
 313         iwlagn_led_enable(priv);
 314
 315         priv->is_open = 1;
 316         IWL_DEBUG_MAC80211(priv, "leave\n");
 317         return 0;
 318 }
 319
 320 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 321 {
 322         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 323
 324         IWL_DEBUG_MAC80211(priv, "enter\n");
 325
 326         if (!priv->is_open)
 327                 return;
 328
 329         priv->is_open = 0;
 330
 331         mutex_lock(&priv->mutex);
 332         iwl_down(priv);
 333         mutex_unlock(&priv->mutex);
 334
 335         iwl_cancel_deferred_work(priv);
 336
 337         flush_workqueue(priv->workqueue);
 338
 339         IWL_DEBUG_MAC80211(priv, "leave\n");
 340 }
 341
 342 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 343                                       struct ieee80211_vif *vif,
 344                                       struct cfg80211_gtk_rekey_data *data)
 345 {
 346         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 347
 348         if (iwlwifi_mod_params.swcrypto)
 349                 return;
 350
 351         IWL_DEBUG_MAC80211(priv, "enter\n");
 352         mutex_lock(&priv->mutex);
 353
 354         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 355                 goto out;
 356
 357         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 358         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 359         priv->replay_ctr =
 360                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 361         priv->have_rekey_data = true;
 362
 363  out:
 364         mutex_unlock(&priv->mutex);
 365         IWL_DEBUG_MAC80211(priv, "leave\n");
 366 }
 367
 368 #ifdef CONFIG_PM_SLEEP
 369
 370 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 371                               struct cfg80211_wowlan *wowlan)
 372 {
 373         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 374         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 375         int ret;
 376
 377         if (WARN_ON(!wowlan))
 378                 return -EINVAL;
 379
 380         IWL_DEBUG_MAC80211(priv, "enter\n");
 381         mutex_lock(&priv->mutex);
 382
 383         /* Don't attempt WoWLAN when not associated, tear down instead. */
 384         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 385             !iwl_is_associated_ctx(ctx)) {
 386                 ret = 1;
 387                 goto out;
 388         }
 389
 390         ret = iwlagn_suspend(priv, wowlan);
 391         if (ret)
 392                 goto error;
 393
 394         /* let the ucode operate on its own */
 395         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 396                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 397
 398         iwl_trans_d3_suspend(priv->trans, false, true);
 399
 400         goto out;
 401
 402  error:
 403         priv->wowlan = false;
 404         iwlagn_prepare_restart(priv);
 405         ieee80211_restart_hw(priv->hw);
 406  out:
 407         mutex_unlock(&priv->mutex);
 408         IWL_DEBUG_MAC80211(priv, "leave\n");
 409
 410         return ret;
 411 }
 412
 413 struct iwl_resume_data {
 414         struct iwl_priv *priv;
 415         struct iwlagn_wowlan_status *cmd;
 416         bool valid;
 417 };
 418
 419 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 420                                  struct iwl_rx_packet *pkt, void *data)
 421 {
 422         struct iwl_resume_data *resume_data = data;
 423         struct iwl_priv *priv = resume_data->priv;
 424
 425         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 426                 IWL_ERR(priv, "rx wrong size data\n");
 427                 return true;
 428         }
 429         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 430         resume_data->valid = true;
 431
 432         return true;
 433 }
 434
 435 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 436 {
 437         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 438         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 439         struct ieee80211_vif *vif;
 440         u32 base;
 441         int ret;
 442         enum iwl_d3_status d3_status;
 443         struct error_table_start {
 444                 /* cf. struct iwl_error_event_table */
 445                 u32 valid;
 446                 u32 error_id;
 447         } err_info;
 448         struct iwl_notification_wait status_wait;
 449         static const u16 status_cmd[] = {
 450                 REPLY_WOWLAN_GET_STATUS,
 451         };
 452         struct iwlagn_wowlan_status status_data = {};
 453         struct iwl_resume_data resume_data = {
 454                 .priv = priv,
 455                 .cmd = &status_data,
 456                 .valid = false,
 457         };
 458         struct cfg80211_wowlan_wakeup wakeup = {
 459                 .pattern_idx = -1,
 460         };
 461 #ifdef CONFIG_IWLWIFI_DEBUGFS
 462         const struct fw_img *img;
 463 #endif
 464
 465         IWL_DEBUG_MAC80211(priv, "enter\n");
 466         mutex_lock(&priv->mutex);
 467
 468         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 469         vif = ctx->vif;
 470
 471         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
 472         if (ret)
 473                 goto out_unlock;
 474
 475         if (d3_status != IWL_D3_STATUS_ALIVE) {
 476                 IWL_INFO(priv, "Device was reset during suspend\n");
 477                 goto out_unlock;
 478         }
 479
 480         /* uCode is no longer operating by itself */
 481         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 482                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 483
 484         base = priv->device_pointers.error_event_table;
 485         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 486                 IWL_WARN(priv, "Invalid error table during resume!\n");
 487                 goto out_unlock;
 488         }
 489
 490         iwl_trans_read_mem_bytes(priv->trans, base,
 491                                  &err_info, sizeof(err_info));
 492
 493         if (err_info.valid) {
 494                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 495                          err_info.valid, err_info.error_id);
 496                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 497                         wakeup.rfkill_release = true;
 498                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 499                                                        GFP_KERNEL);
 500                 }
 501                 goto out_unlock;
 502         }
 503
 504 #ifdef CONFIG_IWLWIFI_DEBUGFS
 505         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 506         if (!priv->wowlan_sram)
 507                 priv->wowlan_sram =
 508                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 509                                 GFP_KERNEL);
 510
 511         if (priv->wowlan_sram)
 512                 iwl_trans_read_mem(priv->trans, 0x800000,
 513                                    priv->wowlan_sram,
 514                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 515 #endif
 516
 517         /*
 518          * This is very strange. The GET_STATUS command is sent but the device
 519          * doesn't reply properly, it seems it doesn't close the RBD so one is
 520          * always left open ... As a result, we need to send another command
 521          * and have to reset the driver afterwards. As we need to switch to
 522          * runtime firmware again that'll happen.
 523          */
 524
 525         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 526                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 527                                    &resume_data);
 528
 529         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 530         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 531         /* an RBD is left open in the firmware now! */
 532
 533         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 534         if (ret)
 535                 goto out_unlock;
 536
 537         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 538                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 539                 struct cfg80211_wowlan_wakeup *wakeup_report;
 540
 541                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 542
 543                 if (reasons) {
 544                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 545                                 wakeup.magic_pkt = true;
 546                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 547                                 wakeup.pattern_idx = status_data.pattern_number;
 548                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 549                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 550                                 wakeup.disconnect = true;
 551                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 552                                 wakeup.gtk_rekey_failure = true;
 553                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 554                                 wakeup.eap_identity_req = true;
 555                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 556                                 wakeup.four_way_handshake = true;
 557                         wakeup_report = &wakeup;
 558                 } else {
 559                         wakeup_report = NULL;
 560                 }
 561
 562                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 563         }
 564
 565         priv->wowlan = false;
 566
 567         iwlagn_prepare_restart(priv);
 568
 569         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 570         iwl_connection_init_rx_config(priv, ctx);
 571         iwlagn_set_rxon_chain(priv, ctx);
 572
 573  out_unlock:
 574         mutex_unlock(&priv->mutex);
 575         IWL_DEBUG_MAC80211(priv, "leave\n");
 576
 577         ieee80211_resume_disconnect(vif);
 578
 579         return 1;
 580 }
 581
 582 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 583 {
 584         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 585
 586         device_set_wakeup_enable(priv->trans->dev, enabled);
 587 }
 588 #endif
 589
 590 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 591                           struct ieee80211_tx_control *control,
 592                           struct sk_buff *skb)
 593 {
 594         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 595
 596         if (iwlagn_tx_skb(priv, control->sta, skb))
 597                 ieee80211_free_txskb(hw, skb);
 598 }
 599
 600 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 601                                        struct ieee80211_vif *vif,
 602                                        struct ieee80211_key_conf *keyconf,
 603                                        struct ieee80211_sta *sta,
 604                                        u32 iv32, u16 *phase1key)
 605 {
 606         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 607
 608         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 609 }
 610
 611 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 612                               struct ieee80211_vif *vif,
 613                               struct ieee80211_sta *sta,
 614                               struct ieee80211_key_conf *key)
 615 {
 616         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 617         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 618         struct iwl_rxon_context *ctx = vif_priv->ctx;
 619         int ret;
 620         bool is_default_wep_key = false;
 621
 622         IWL_DEBUG_MAC80211(priv, "enter\n");
 623
 624         if (iwlwifi_mod_params.swcrypto) {
 625                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 626                 return -EOPNOTSUPP;
 627         }
 628
 629         switch (key->cipher) {
 630         case WLAN_CIPHER_SUITE_TKIP:
 631                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 632                 /* fall through */
 633         case WLAN_CIPHER_SUITE_CCMP:
 634                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 635                 break;
 636         default:
 637                 break;
 638         }
 639
 640         /*
 641          * We could program these keys into the hardware as well, but we
 642          * don't expect much multicast traffic in IBSS and having keys
 643          * for more stations is probably more useful.
 644          *
 645          * Mark key TX-only and return 0.
 646          */
 647         if (vif->type == NL80211_IFTYPE_ADHOC &&
 648             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 649                 key->hw_key_idx = WEP_INVALID_OFFSET;
 650                 return 0;
 651         }
 652
 653         /* If they key was TX-only, accept deletion */
 654         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 655                 return 0;
 656
 657         mutex_lock(&priv->mutex);
 658         iwl_scan_cancel_timeout(priv, 100);
 659
 660         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 661
 662         /*
 663          * If we are getting WEP group key and we didn't receive any key mapping
 664          * so far, we are in legacy wep mode (group key only), otherwise we are
 665          * in 1X mode.
 666          * In legacy wep mode, we use another host command to the uCode.
 667          */
 668         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 669              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 670                 if (cmd == SET_KEY)
 671                         is_default_wep_key = !ctx->key_mapping_keys;
 672                 else
 673                         is_default_wep_key =
 674                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 675         }
 676
 677
 678         switch (cmd) {
 679         case SET_KEY:
 680                 if (is_default_wep_key) {
 681                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 682                         break;
 683                 }
 684                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 685                 if (ret) {
 686                         /*
 687                          * can't add key for RX, but we don't need it
 688                          * in the device for TX so still return 0
 689                          */
 690                         ret = 0;
 691                         key->hw_key_idx = WEP_INVALID_OFFSET;
 692                 }
 693
 694                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 695                 break;
 696         case DISABLE_KEY:
 697                 if (is_default_wep_key)
 698                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 699                 else
 700                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 701
 702                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 703                 break;
 704         default:
 705                 ret = -EINVAL;
 706         }
 707
 708         mutex_unlock(&priv->mutex);
 709         IWL_DEBUG_MAC80211(priv, "leave\n");
 710
 711         return ret;
 712 }
 713
 714 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 715                                    struct ieee80211_vif *vif,
 716                                    struct ieee80211_ampdu_params *params)
 717 {
 718         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 719         int ret = -EINVAL;
 720         struct ieee80211_sta *sta = params->sta;
 721         enum ieee80211_ampdu_mlme_action action = params->action;
 722         u16 tid = params->tid;
 723         u16 *ssn = &params->ssn;
 724         u8 buf_size = params->buf_size;
 725         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 726
 727         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 728                      sta->addr, tid);
 729
 730         if (!(priv->nvm_data->sku_cap_11n_enable))
 731                 return -EACCES;
 732
 733         IWL_DEBUG_MAC80211(priv, "enter\n");
 734         mutex_lock(&priv->mutex);
 735
 736         switch (action) {
 737         case IEEE80211_AMPDU_RX_START:
 738                 if (!iwl_enable_rx_ampdu())
 739                         break;
 740                 IWL_DEBUG_HT(priv, "start Rx\n");
 741                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 742                 break;
 743         case IEEE80211_AMPDU_RX_STOP:
 744                 IWL_DEBUG_HT(priv, "stop Rx\n");
 745                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 746                 break;
 747         case IEEE80211_AMPDU_TX_START:
 748                 if (!priv->trans->ops->txq_enable)
 749                         break;
 750                 if (!iwl_enable_tx_ampdu())
 751                         break;
 752                 IWL_DEBUG_HT(priv, "start Tx\n");
 753                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 754                 break;
 755         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 756         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 757                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 758                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 759                 break;
 760         case IEEE80211_AMPDU_TX_STOP_CONT:
 761                 IWL_DEBUG_HT(priv, "stop Tx\n");
 762                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 763                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 764                         priv->agg_tids_count--;
 765                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 766                                      priv->agg_tids_count);
 767                 }
 768                 if (!priv->agg_tids_count &&
 769                     priv->hw_params.use_rts_for_aggregation) {
 770                         /*
 771                          * switch off RTS/CTS if it was previously enabled
 772                          */
 773                         sta_priv->lq_sta.lq.general_params.flags &=
 774                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 775                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 776                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 777                 }
 778                 break;
 779         case IEEE80211_AMPDU_TX_OPERATIONAL:
 780                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 781                 break;
 782         }
 783         mutex_unlock(&priv->mutex);
 784         IWL_DEBUG_MAC80211(priv, "leave\n");
 785         return ret;
 786 }
 787
 788 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 789                               struct ieee80211_vif *vif,
 790                               struct ieee80211_sta *sta)
 791 {
 792         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 793         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 794         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 795         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 796         int ret;
 797         u8 sta_id;
 798
 799         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 800                         sta->addr);
 801         sta_priv->sta_id = IWL_INVALID_STATION;
 802
 803         atomic_set(&sta_priv->pending_frames, 0);
 804         if (vif->type == NL80211_IFTYPE_AP)
 805                 sta_priv->client = true;
 806
 807         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 808                                      is_ap, sta, &sta_id);
 809         if (ret) {
 810                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 811                         sta->addr, ret);
 812                 /* Should we return success if return code is EEXIST ? */
 813                 return ret;
 814         }
 815
 816         sta_priv->sta_id = sta_id;
 817
 818         return 0;
 819 }
 820
 821 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 822                                  struct ieee80211_vif *vif,
 823                                  struct ieee80211_sta *sta)
 824 {
 825         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 826         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 827         int ret;
 828
 829         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 830
 831         if (vif->type == NL80211_IFTYPE_STATION) {
 832                 /*
 833                  * Station will be removed from device when the RXON
 834                  * is set to unassociated -- just deactivate it here
 835                  * to avoid re-programming it.
 836                  */
 837                 ret = 0;
 838                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 839         } else {
 840                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 841                 if (ret)
 842                         IWL_DEBUG_QUIET_RFKILL(priv,
 843                                 "Error removing station %pM\n", sta->addr);
 844         }
 845         return ret;
 846 }
 847
 848 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 849                                 struct ieee80211_vif *vif,
 850                                 struct ieee80211_sta *sta,
 851                                 enum ieee80211_sta_state old_state,
 852                                 enum ieee80211_sta_state new_state)
 853 {
 854         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 855         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 856         enum {
 857                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 858         } op = NONE;
 859         int ret;
 860
 861         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 862                            sta->addr, old_state, new_state);
 863
 864         mutex_lock(&priv->mutex);
 865         if (vif->type == NL80211_IFTYPE_STATION) {
 866                 if (old_state == IEEE80211_STA_NOTEXIST &&
 867                     new_state == IEEE80211_STA_NONE)
 868                         op = ADD;
 869                 else if (old_state == IEEE80211_STA_NONE &&
 870                          new_state == IEEE80211_STA_NOTEXIST)
 871                         op = REMOVE;
 872                 else if (old_state == IEEE80211_STA_AUTH &&
 873                          new_state == IEEE80211_STA_ASSOC)
 874                         op = HT_RATE_INIT;
 875         } else {
 876                 if (old_state == IEEE80211_STA_AUTH &&
 877                     new_state == IEEE80211_STA_ASSOC)
 878                         op = ADD_RATE_INIT;
 879                 else if (old_state == IEEE80211_STA_ASSOC &&
 880                          new_state == IEEE80211_STA_AUTH)
 881                         op = REMOVE;
 882         }
 883
 884         switch (op) {
 885         case ADD:
 886                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 887                 if (ret)
 888                         break;
 889                 /*
 890                  * Clear the in-progress flag, the AP station entry was added
 891                  * but we'll initialize LQ only when we've associated (which
 892                  * would also clear the in-progress flag). This is necessary
 893                  * in case we never initialize LQ because association fails.
 894                  */
 895                 spin_lock_bh(&priv->sta_lock);
 896                 priv->stations[iwl_sta_id(sta)].used &=
 897                         ~IWL_STA_UCODE_INPROGRESS;
 898                 spin_unlock_bh(&priv->sta_lock);
 899                 break;
 900         case REMOVE:
 901                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 902                 break;
 903         case ADD_RATE_INIT:
 904                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 905                 if (ret)
 906                         break;
 907                 /* Initialize rate scaling */
 908                 IWL_DEBUG_INFO(priv,
 909                                "Initializing rate scaling for station %pM\n",
 910                                sta->addr);
 911                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 912                 ret = 0;
 913                 break;
 914         case HT_RATE_INIT:
 915                 /* Initialize rate scaling */
 916                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 917                 if (ret)
 918                         break;
 919                 IWL_DEBUG_INFO(priv,
 920                                "Initializing rate scaling for station %pM\n",
 921                                sta->addr);
 922                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 923                 ret = 0;
 924                 break;
 925         default:
 926                 ret = 0;
 927                 break;
 928         }
 929
 930         /*
 931          * mac80211 might WARN if we fail, but due the way we
 932          * (badly) handle hard rfkill, we might fail here
 933          */
 934         if (iwl_is_rfkill(priv))
 935                 ret = 0;
 936
 937         mutex_unlock(&priv->mutex);
 938         IWL_DEBUG_MAC80211(priv, "leave\n");
 939
 940         return ret;
 941 }
 942
 943 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 944                                       struct ieee80211_vif *vif,
 945                                       struct ieee80211_channel_switch *ch_switch)
 946 {
 947         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 948         struct ieee80211_conf *conf = &hw->conf;
 949         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 950         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 951         /*
 952          * MULTI-FIXME
 953          * When we add support for multiple interfaces, we need to
 954          * revisit this. The channel switch command in the device
 955          * only affects the BSS context, but what does that really
 956          * mean? And what if we get a CSA on the second interface?
 957          * This needs a lot of work.
 958          */
 959         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 960         u16 ch;
 961
 962         IWL_DEBUG_MAC80211(priv, "enter\n");
 963
 964         mutex_lock(&priv->mutex);
 965
 966         if (iwl_is_rfkill(priv))
 967                 goto out;
 968
 969         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 970             test_bit(STATUS_SCANNING, &priv->status) ||
 971             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 972                 goto out;
 973
 974         if (!iwl_is_associated_ctx(ctx))
 975                 goto out;
 976
 977         if (!priv->lib->set_channel_switch)
 978                 goto out;
 979
 980         ch = channel->hw_value;
 981         if (le16_to_cpu(ctx->active.channel) == ch)
 982                 goto out;
 983
 984         priv->current_ht_config.smps = conf->smps_mode;
 985
 986         /* Configure HT40 channels */
 987         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 988         case NL80211_CHAN_NO_HT:
 989         case NL80211_CHAN_HT20:
 990                 ctx->ht.is_40mhz = false;
 991                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 992                 break;
 993         case NL80211_CHAN_HT40MINUS:
 994                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 995                 ctx->ht.is_40mhz = true;
 996                 break;
 997         case NL80211_CHAN_HT40PLUS:
 998                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 999                 ctx->ht.is_40mhz = true;
1000                 break;
1001         }
1002
1003         if ((le16_to_cpu(ctx->staging.channel) != ch))
1004                 ctx->staging.flags = 0;
1005
1006         iwl_set_rxon_channel(priv, channel, ctx);
1007         iwl_set_rxon_ht(priv, ht_conf);
1008         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1009
1010         /*
1011          * at this point, staging_rxon has the
1012          * configuration for channel switch
1013          */
1014         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1015         priv->switch_channel = cpu_to_le16(ch);
1016         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1017                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1018                 priv->switch_channel = 0;
1019                 ieee80211_chswitch_done(ctx->vif, false);
1020         }
1021
1022 out:
1023         mutex_unlock(&priv->mutex);
1024         IWL_DEBUG_MAC80211(priv, "leave\n");
1025 }
1026
1027 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1028 {
1029         /*
1030          * MULTI-FIXME
1031          * See iwlagn_mac_channel_switch.
1032          */
1033         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1034
1035         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1036                 return;
1037
1038         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1039                 return;
1040
1041         if (ctx->vif)
1042                 ieee80211_chswitch_done(ctx->vif, is_success);
1043 }
1044
1045 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1046                                     unsigned int changed_flags,
1047                                     unsigned int *total_flags,
1048                                     u64 multicast)
1049 {
1050         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1051         __le32 filter_or = 0, filter_nand = 0;
1052         struct iwl_rxon_context *ctx;
1053
1054 #define CHK(test, flag) do { \
1055         if (*total_flags & (test))              \
1056                 filter_or |= (flag);            \
1057         else                                    \
1058                 filter_nand |= (flag);          \
1059         } while (0)
1060
1061         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1062                         changed_flags, *total_flags);
1063
1064         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1065         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1066         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1067         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1068
1069 #undef CHK
1070
1071         mutex_lock(&priv->mutex);
1072
1073         for_each_context(priv, ctx) {
1074                 ctx->staging.filter_flags &= ~filter_nand;
1075                 ctx->staging.filter_flags |= filter_or;
1076
1077                 /*
1078                  * Not committing directly because hardware can perform a scan,
1079                  * but we'll eventually commit the filter flags change anyway.
1080                  */
1081         }
1082
1083         mutex_unlock(&priv->mutex);
1084
1085         /*
1086          * Receiving all multicast frames is always enabled by the
1087          * default flags setup in iwl_connection_init_rx_config()
1088          * since we currently do not support programming multicast
1089          * filters into the device.
1090          */
1091         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1092                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1093 }
1094
1095 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1096                              u32 queues, bool drop)
1097 {
1098         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1099         u32 scd_queues;
1100
1101         mutex_lock(&priv->mutex);
1102         IWL_DEBUG_MAC80211(priv, "enter\n");
1103
1104         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1105                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1106                 goto done;
1107         }
1108         if (iwl_is_rfkill(priv)) {
1109                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1110                 goto done;
1111         }
1112
1113         scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1114         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1115                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1116
1117         if (drop) {
1118                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1119                                     scd_queues);
1120                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1121                         IWL_ERR(priv, "flush request fail\n");
1122                         goto done;
1123                 }
1124         }
1125
1126         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1127         iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1128 done:
1129         mutex_unlock(&priv->mutex);
1130         IWL_DEBUG_MAC80211(priv, "leave\n");
1131 }
1132
1133 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1134                                       struct ieee80211_vif *vif,
1135                                       const struct ieee80211_event *event)
1136 {
1137         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1138
1139         if (event->type != RSSI_EVENT)
1140                 return;
1141
1142         IWL_DEBUG_MAC80211(priv, "enter\n");
1143
1144         if (priv->lib->bt_params &&
1145             priv->lib->bt_params->advanced_bt_coexist) {
1146                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1147                         priv->bt_enable_pspoll = true;
1148                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1149                         priv->bt_enable_pspoll = false;
1150
1151                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1152         } else {
1153                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1154                                 "ignoring RSSI callback\n");
1155         }
1156
1157         IWL_DEBUG_MAC80211(priv, "leave\n");
1158 }
1159
1160 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1161                               struct ieee80211_sta *sta, bool set)
1162 {
1163         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1164
1165         queue_work(priv->workqueue, &priv->beacon_update);
1166
1167         return 0;
1168 }
1169
1170 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1171                               struct ieee80211_vif *vif, u16 queue,
1172                               const struct ieee80211_tx_queue_params *params)
1173 {
1174         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1175         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1176         struct iwl_rxon_context *ctx = vif_priv->ctx;
1177         int q;
1178
1179         if (WARN_ON(!ctx))
1180                 return -EINVAL;
1181
1182         IWL_DEBUG_MAC80211(priv, "enter\n");
1183
1184         if (!iwl_is_ready_rf(priv)) {
1185                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1186                 return -EIO;
1187         }
1188
1189         if (queue >= AC_NUM) {
1190                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1191                 return 0;
1192         }
1193
1194         q = AC_NUM - 1 - queue;
1195
1196         mutex_lock(&priv->mutex);
1197
1198         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1199                 cpu_to_le16(params->cw_min);
1200         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1201                 cpu_to_le16(params->cw_max);
1202         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1203         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1204                         cpu_to_le16((params->txop * 32));
1205
1206         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1207
1208         mutex_unlock(&priv->mutex);
1209
1210         IWL_DEBUG_MAC80211(priv, "leave\n");
1211         return 0;
1212 }
1213
1214 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1215 {
1216         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1217
1218         return priv->ibss_manager == IWL_IBSS_MANAGER;
1219 }
1220
1221 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1222 {
1223         iwl_connection_init_rx_config(priv, ctx);
1224
1225         iwlagn_set_rxon_chain(priv, ctx);
1226
1227         return iwlagn_commit_rxon(priv, ctx);
1228 }
1229
1230 static int iwl_setup_interface(struct iwl_priv *priv,
1231                                struct iwl_rxon_context *ctx)
1232 {
1233         struct ieee80211_vif *vif = ctx->vif;
1234         int err, ac;
1235
1236         lockdep_assert_held(&priv->mutex);
1237
1238         /*
1239          * This variable will be correct only when there's just
1240          * a single context, but all code using it is for hardware
1241          * that supports only one context.
1242          */
1243         priv->iw_mode = vif->type;
1244
1245         ctx->is_active = true;
1246
1247         err = iwl_set_mode(priv, ctx);
1248         if (err) {
1249                 if (!ctx->always_active)
1250                         ctx->is_active = false;
1251                 return err;
1252         }
1253
1254         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1255             vif->type == NL80211_IFTYPE_ADHOC) {
1256                 /*
1257                  * pretend to have high BT traffic as long as we
1258                  * are operating in IBSS mode, as this will cause
1259                  * the rate scaling etc. to behave as intended.
1260                  */
1261                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1262         }
1263
1264         /* set up queue mappings */
1265         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1266                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1267
1268         if (vif->type == NL80211_IFTYPE_AP)
1269                 vif->cab_queue = ctx->mcast_queue;
1270         else
1271                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1272
1273         return 0;
1274 }
1275
1276 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1277                                     struct ieee80211_vif *vif)
1278 {
1279         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1280         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1281         struct iwl_rxon_context *tmp, *ctx = NULL;
1282         int err;
1283         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1284         bool reset = false;
1285
1286         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1287                            viftype, vif->addr);
1288
1289         mutex_lock(&priv->mutex);
1290
1291         if (!iwl_is_ready_rf(priv)) {
1292                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1293                 err = -EINVAL;
1294                 goto out;
1295         }
1296
1297         for_each_context(priv, tmp) {
1298                 u32 possible_modes =
1299                         tmp->interface_modes | tmp->exclusive_interface_modes;
1300
1301                 if (tmp->vif) {
1302                         /* On reset we need to add the same interface again */
1303                         if (tmp->vif == vif) {
1304                                 reset = true;
1305                                 ctx = tmp;
1306                                 break;
1307                         }
1308
1309                         /* check if this busy context is exclusive */
1310                         if (tmp->exclusive_interface_modes &
1311                                                 BIT(tmp->vif->type)) {
1312                                 err = -EINVAL;
1313                                 goto out;
1314                         }
1315                         continue;
1316                 }
1317
1318                 if (!(possible_modes & BIT(viftype)))
1319                         continue;
1320
1321                 /* have maybe usable context w/o interface */
1322                 ctx = tmp;
1323                 break;
1324         }
1325
1326         if (!ctx) {
1327                 err = -EOPNOTSUPP;
1328                 goto out;
1329         }
1330
1331         vif_priv->ctx = ctx;
1332         ctx->vif = vif;
1333
1334         /*
1335          * In SNIFFER device type, the firmware reports the FCS to
1336          * the host, rather than snipping it off. Unfortunately,
1337          * mac80211 doesn't (yet) provide a per-packet flag for
1338          * this, so that we have to set the hardware flag based
1339          * on the interfaces added. As the monitor interface can
1340          * only be present by itself, and will be removed before
1341          * other interfaces are added, this is safe.
1342          */
1343         if (vif->type == NL80211_IFTYPE_MONITOR)
1344                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1345         else
1346                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1347
1348         err = iwl_setup_interface(priv, ctx);
1349         if (!err || reset)
1350                 goto out;
1351
1352         ctx->vif = NULL;
1353         priv->iw_mode = NL80211_IFTYPE_STATION;
1354  out:
1355         mutex_unlock(&priv->mutex);
1356
1357         IWL_DEBUG_MAC80211(priv, "leave\n");
1358         return err;
1359 }
1360
1361 static void iwl_teardown_interface(struct iwl_priv *priv,
1362                                    struct ieee80211_vif *vif,
1363                                    bool mode_change)
1364 {
1365         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1366
1367         lockdep_assert_held(&priv->mutex);
1368
1369         if (priv->scan_vif == vif) {
1370                 iwl_scan_cancel_timeout(priv, 200);
1371                 iwl_force_scan_end(priv);
1372         }
1373
1374         if (!mode_change) {
1375                 iwl_set_mode(priv, ctx);
1376                 if (!ctx->always_active)
1377                         ctx->is_active = false;
1378         }
1379
1380         /*
1381          * When removing the IBSS interface, overwrite the
1382          * BT traffic load with the stored one from the last
1383          * notification, if any. If this is a device that
1384          * doesn't implement this, this has no effect since
1385          * both values are the same and zero.
1386          */
1387         if (vif->type == NL80211_IFTYPE_ADHOC)
1388                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1389 }
1390
1391 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1392                               struct ieee80211_vif *vif)
1393 {
1394         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1395         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1396
1397         IWL_DEBUG_MAC80211(priv, "enter\n");
1398
1399         mutex_lock(&priv->mutex);
1400
1401         WARN_ON(ctx->vif != vif);
1402         ctx->vif = NULL;
1403
1404         iwl_teardown_interface(priv, vif, false);
1405
1406         mutex_unlock(&priv->mutex);
1407
1408         IWL_DEBUG_MAC80211(priv, "leave\n");
1409
1410 }
1411
1412 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1413                                        struct ieee80211_vif *vif,
1414                                        enum nl80211_iftype newtype, bool newp2p)
1415 {
1416         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1417         struct iwl_rxon_context *ctx, *tmp;
1418         enum nl80211_iftype newviftype = newtype;
1419         u32 interface_modes;
1420         int err;
1421
1422         IWL_DEBUG_MAC80211(priv, "enter\n");
1423
1424         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1425
1426         mutex_lock(&priv->mutex);
1427
1428         ctx = iwl_rxon_ctx_from_vif(vif);
1429
1430         /*
1431          * To simplify this code, only support changes on the
1432          * BSS context. The PAN context is usually reassigned
1433          * by creating/removing P2P interfaces anyway.
1434          */
1435         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1436                 err = -EBUSY;
1437                 goto out;
1438         }
1439
1440         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1441                 /*
1442                  * Huh? But wait ... this can maybe happen when
1443                  * we're in the middle of a firmware restart!
1444                  */
1445                 err = -EBUSY;
1446                 goto out;
1447         }
1448
1449         /* Check if the switch is supported in the same context */
1450         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1451         if (!(interface_modes & BIT(newtype))) {
1452                 err = -EBUSY;
1453                 goto out;
1454         }
1455
1456         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1457                 for_each_context(priv, tmp) {
1458                         if (ctx == tmp)
1459                                 continue;
1460
1461                         if (!tmp->is_active)
1462                                 continue;
1463
1464                         /*
1465                          * The current mode switch would be exclusive, but
1466                          * another context is active ... refuse the switch.
1467                          */
1468                         err = -EBUSY;
1469                         goto out;
1470                 }
1471         }
1472
1473         /* success */
1474         iwl_teardown_interface(priv, vif, true);
1475         vif->type = newviftype;
1476         vif->p2p = newp2p;
1477         err = iwl_setup_interface(priv, ctx);
1478         WARN_ON(err);
1479         /*
1480          * We've switched internally, but submitting to the
1481          * device may have failed for some reason. Mask this
1482          * error, because otherwise mac80211 will not switch
1483          * (and set the interface type back) and we'll be
1484          * out of sync with it.
1485          */
1486         err = 0;
1487
1488  out:
1489         mutex_unlock(&priv->mutex);
1490         IWL_DEBUG_MAC80211(priv, "leave\n");
1491
1492         return err;
1493 }
1494
1495 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1496                               struct ieee80211_vif *vif,
1497                               struct ieee80211_scan_request *hw_req)
1498 {
1499         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1500         struct cfg80211_scan_request *req = &hw_req->req;
1501         int ret;
1502
1503         IWL_DEBUG_MAC80211(priv, "enter\n");
1504
1505         if (req->n_channels == 0)
1506                 return -EINVAL;
1507
1508         mutex_lock(&priv->mutex);
1509
1510         /*
1511          * If an internal scan is in progress, just set
1512          * up the scan_request as per above.
1513          */
1514         if (priv->scan_type != IWL_SCAN_NORMAL) {
1515                 IWL_DEBUG_SCAN(priv,
1516                                "SCAN request during internal scan - defer\n");
1517                 priv->scan_request = req;
1518                 priv->scan_vif = vif;
1519                 ret = 0;
1520         } else {
1521                 priv->scan_request = req;
1522                 priv->scan_vif = vif;
1523                 /*
1524                  * mac80211 will only ask for one band at a time
1525                  * so using channels[0] here is ok
1526                  */
1527                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1528                                         req->channels[0]->band);
1529                 if (ret) {
1530                         priv->scan_request = NULL;
1531                         priv->scan_vif = NULL;
1532                 }
1533         }
1534
1535         IWL_DEBUG_MAC80211(priv, "leave\n");
1536
1537         mutex_unlock(&priv->mutex);
1538
1539         return ret;
1540 }
1541
1542 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1543 {
1544         struct iwl_addsta_cmd cmd = {
1545                 .mode = STA_CONTROL_MODIFY_MSK,
1546                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1547                 .sta.sta_id = sta_id,
1548         };
1549
1550         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1551 }
1552
1553 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1554                                   struct ieee80211_vif *vif,
1555                                   enum sta_notify_cmd cmd,
1556                                   struct ieee80211_sta *sta)
1557 {
1558         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1559         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1560         int sta_id;
1561
1562         IWL_DEBUG_MAC80211(priv, "enter\n");
1563
1564         switch (cmd) {
1565         case STA_NOTIFY_SLEEP:
1566                 WARN_ON(!sta_priv->client);
1567                 sta_priv->asleep = true;
1568                 if (atomic_read(&sta_priv->pending_frames) > 0)
1569                         ieee80211_sta_block_awake(hw, sta, true);
1570                 break;
1571         case STA_NOTIFY_AWAKE:
1572                 WARN_ON(!sta_priv->client);
1573                 if (!sta_priv->asleep)
1574                         break;
1575                 sta_priv->asleep = false;
1576                 sta_id = iwl_sta_id(sta);
1577                 if (sta_id != IWL_INVALID_STATION)
1578                         iwl_sta_modify_ps_wake(priv, sta_id);
1579                 break;
1580         default:
1581                 break;
1582         }
1583         IWL_DEBUG_MAC80211(priv, "leave\n");
1584 }
1585
1586 const struct ieee80211_ops iwlagn_hw_ops = {
1587         .tx = iwlagn_mac_tx,
1588         .start = iwlagn_mac_start,
1589         .stop = iwlagn_mac_stop,
1590 #ifdef CONFIG_PM_SLEEP
1591         .suspend = iwlagn_mac_suspend,
1592         .resume = iwlagn_mac_resume,
1593         .set_wakeup = iwlagn_mac_set_wakeup,
1594 #endif
1595         .add_interface = iwlagn_mac_add_interface,
1596         .remove_interface = iwlagn_mac_remove_interface,
1597         .change_interface = iwlagn_mac_change_interface,
1598         .config = iwlagn_mac_config,
1599         .configure_filter = iwlagn_configure_filter,
1600         .set_key = iwlagn_mac_set_key,
1601         .update_tkip_key = iwlagn_mac_update_tkip_key,
1602         .set_rekey_data = iwlagn_mac_set_rekey_data,
1603         .conf_tx = iwlagn_mac_conf_tx,
1604         .bss_info_changed = iwlagn_bss_info_changed,
1605         .ampdu_action = iwlagn_mac_ampdu_action,
1606         .hw_scan = iwlagn_mac_hw_scan,
1607         .sta_notify = iwlagn_mac_sta_notify,
1608         .sta_state = iwlagn_mac_sta_state,
1609         .channel_switch = iwlagn_mac_channel_switch,
1610         .flush = iwlagn_mac_flush,
1611         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1612         .event_callback = iwlagn_mac_event_callback,
1613         .set_tim = iwlagn_mac_set_tim,
1614 };
1615
1616 /* This function both allocates and initializes hw and priv. */
1617 struct ieee80211_hw *iwl_alloc_all(void)
1618 {
1619         struct iwl_priv *priv;
1620         struct iwl_op_mode *op_mode;
1621         /* mac80211 allocates memory for this device instance, including
1622          *   space for this driver's private structure */
1623         struct ieee80211_hw *hw;
1624
1625         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1626                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1627         if (!hw)
1628                 goto out;
1629
1630         op_mode = hw->priv;
1631         priv = IWL_OP_MODE_GET_DVM(op_mode);
1632         priv->hw = hw;
1633
1634 out:
1635         return hw;
1636 }