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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 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/slab.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/sched.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/if_arp.h>
  39
  40 #include <net/ieee80211_radiotap.h>
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-io.h"
  46 #include "iwl-trans.h"
  47 #include "iwl-op-mode.h"
  48 #include "iwl-modparams.h"
  49
  50 #include "dev.h"
  51 #include "calib.h"
  52 #include "agn.h"
  53
  54 /*****************************************************************************
  55  *
  56  * mac80211 entry point functions
  57  *
  58  *****************************************************************************/
  59
  60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  61         {
  62                 .max = 1,
  63                 .types = BIT(NL80211_IFTYPE_STATION),
  64         },
  65         {
  66                 .max = 1,
  67                 .types = BIT(NL80211_IFTYPE_AP),
  68         },
  69 };
  70
  71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  72         {
  73                 .max = 2,
  74                 .types = BIT(NL80211_IFTYPE_STATION),
  75         },
  76 };
  77
  78 static const struct ieee80211_iface_combination
  79 iwlagn_iface_combinations_dualmode[] = {
  80         { .num_different_channels = 1,
  81           .max_interfaces = 2,
  82           .beacon_int_infra_match = true,
  83           .limits = iwlagn_sta_ap_limits,
  84           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  85         },
  86         { .num_different_channels = 1,
  87           .max_interfaces = 2,
  88           .limits = iwlagn_2sta_limits,
  89           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  90         },
  91 };
  92
  93 /*
  94  * Not a mac80211 entry point function, but it fits in with all the
  95  * other mac80211 functions grouped here.
  96  */
  97 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  98                               const struct iwl_ucode_capabilities *capa)
  99 {
 100         int ret;
 101         struct ieee80211_hw *hw = priv->hw;
 102         struct iwl_rxon_context *ctx;
 103
 104         hw->rate_control_algorithm = "iwl-agn-rs";
 105
 106         /* Tell mac80211 our characteristics */
 107         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 108                     IEEE80211_HW_AMPDU_AGGREGATION |
 109                     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 110                     IEEE80211_HW_SPECTRUM_MGMT |
 111                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 112                     IEEE80211_HW_QUEUE_CONTROL |
 113                     IEEE80211_HW_SUPPORTS_PS |
 114                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 115                     IEEE80211_HW_WANT_MONITOR_VIF;
 116
 117         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 118         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 119
 120         /*
 121          * Including the following line will crash some AP's.  This
 122          * workaround removes the stimulus which causes the crash until
 123          * the AP software can be fixed.
 124         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 125          */
 126
 127         if (priv->nvm_data->sku_cap_11n_enable)
 128                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 129                                        NL80211_FEATURE_STATIC_SMPS;
 130
 131         /*
 132          * Enable 11w if advertised by firmware and software crypto
 133          * is not enabled (as the firmware will interpret some mgmt
 134          * packets, so enabling it with software crypto isn't safe)
 135          */
 136         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 137             !iwlwifi_mod_params.sw_crypto)
 138                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 139
 140         hw->sta_data_size = sizeof(struct iwl_station_priv);
 141         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 142
 143         for_each_context(priv, ctx) {
 144                 hw->wiphy->interface_modes |= ctx->interface_modes;
 145                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 146         }
 147
 148         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 149
 150         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 151                 hw->wiphy->iface_combinations =
 152                         iwlagn_iface_combinations_dualmode;
 153                 hw->wiphy->n_iface_combinations =
 154                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 155         }
 156
 157         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 158         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 159                                        REGULATORY_DISABLE_BEACON_HINTS;
 160
 161 #ifdef CONFIG_PM_SLEEP
 162         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 163             priv->trans->ops->d3_suspend &&
 164             priv->trans->ops->d3_resume &&
 165             device_can_wakeup(priv->trans->dev)) {
 166                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 167                                              WIPHY_WOWLAN_DISCONNECT |
 168                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 169                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 170                 if (!iwlwifi_mod_params.sw_crypto)
 171                         priv->wowlan_support.flags |=
 172                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 173                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 174
 175                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 176                 priv->wowlan_support.pattern_min_len =
 177                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 178                 priv->wowlan_support.pattern_max_len =
 179                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 180                 hw->wiphy->wowlan = &priv->wowlan_support;
 181         }
 182 #endif
 183
 184         if (iwlwifi_mod_params.power_save)
 185                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 186         else
 187                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 188
 189         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 190         /* we create the 802.11 header and a max-length SSID element */
 191         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 192
 193         /*
 194          * We don't use all queues: 4 and 9 are unused and any
 195          * aggregation queue gets mapped down to the AC queue.
 196          */
 197         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 198
 199         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 200
 201         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 202                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 203                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 204         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 205                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 206                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 207
 208         hw->wiphy->hw_version = priv->trans->hw_id;
 209
 210         iwl_leds_init(priv);
 211
 212         ret = ieee80211_register_hw(priv->hw);
 213         if (ret) {
 214                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 215                 iwl_leds_exit(priv);
 216                 return ret;
 217         }
 218         priv->mac80211_registered = 1;
 219
 220         return 0;
 221 }
 222
 223 void iwlagn_mac_unregister(struct iwl_priv *priv)
 224 {
 225         if (!priv->mac80211_registered)
 226                 return;
 227         iwl_leds_exit(priv);
 228         ieee80211_unregister_hw(priv->hw);
 229         priv->mac80211_registered = 0;
 230 }
 231
 232 static int __iwl_up(struct iwl_priv *priv)
 233 {
 234         struct iwl_rxon_context *ctx;
 235         int ret;
 236
 237         lockdep_assert_held(&priv->mutex);
 238
 239         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 240                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 241                 return -EIO;
 242         }
 243
 244         for_each_context(priv, ctx) {
 245                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 246                 if (ret) {
 247                         iwl_dealloc_bcast_stations(priv);
 248                         return ret;
 249                 }
 250         }
 251
 252         ret = iwl_run_init_ucode(priv);
 253         if (ret) {
 254                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 255                 goto error;
 256         }
 257
 258         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 259         if (ret) {
 260                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 261                 goto error;
 262         }
 263
 264         ret = iwl_alive_start(priv);
 265         if (ret)
 266                 goto error;
 267         return 0;
 268
 269  error:
 270         set_bit(STATUS_EXIT_PENDING, &priv->status);
 271         iwl_down(priv);
 272         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 273
 274         IWL_ERR(priv, "Unable to initialize device.\n");
 275         return ret;
 276 }
 277
 278 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 279 {
 280         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 281         int ret;
 282
 283         IWL_DEBUG_MAC80211(priv, "enter\n");
 284
 285         /* we should be verifying the device is ready to be opened */
 286         mutex_lock(&priv->mutex);
 287         ret = __iwl_up(priv);
 288         mutex_unlock(&priv->mutex);
 289         if (ret)
 290                 return ret;
 291
 292         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 293
 294         /* Now we should be done, and the READY bit should be set. */
 295         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 296                 ret = -EIO;
 297
 298         iwlagn_led_enable(priv);
 299
 300         priv->is_open = 1;
 301         IWL_DEBUG_MAC80211(priv, "leave\n");
 302         return 0;
 303 }
 304
 305 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 306 {
 307         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 308
 309         IWL_DEBUG_MAC80211(priv, "enter\n");
 310
 311         if (!priv->is_open)
 312                 return;
 313
 314         priv->is_open = 0;
 315
 316         mutex_lock(&priv->mutex);
 317         iwl_down(priv);
 318         mutex_unlock(&priv->mutex);
 319
 320         iwl_cancel_deferred_work(priv);
 321
 322         flush_workqueue(priv->workqueue);
 323
 324         IWL_DEBUG_MAC80211(priv, "leave\n");
 325 }
 326
 327 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 328                                       struct ieee80211_vif *vif,
 329                                       struct cfg80211_gtk_rekey_data *data)
 330 {
 331         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 332
 333         if (iwlwifi_mod_params.sw_crypto)
 334                 return;
 335
 336         IWL_DEBUG_MAC80211(priv, "enter\n");
 337         mutex_lock(&priv->mutex);
 338
 339         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 340                 goto out;
 341
 342         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 343         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 344         priv->replay_ctr =
 345                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 346         priv->have_rekey_data = true;
 347
 348  out:
 349         mutex_unlock(&priv->mutex);
 350         IWL_DEBUG_MAC80211(priv, "leave\n");
 351 }
 352
 353 #ifdef CONFIG_PM_SLEEP
 354
 355 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 356                               struct cfg80211_wowlan *wowlan)
 357 {
 358         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 359         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 360         int ret;
 361
 362         if (WARN_ON(!wowlan))
 363                 return -EINVAL;
 364
 365         IWL_DEBUG_MAC80211(priv, "enter\n");
 366         mutex_lock(&priv->mutex);
 367
 368         /* Don't attempt WoWLAN when not associated, tear down instead. */
 369         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 370             !iwl_is_associated_ctx(ctx)) {
 371                 ret = 1;
 372                 goto out;
 373         }
 374
 375         ret = iwlagn_suspend(priv, wowlan);
 376         if (ret)
 377                 goto error;
 378
 379         /* let the ucode operate on its own */
 380         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 381                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 382
 383         iwl_trans_d3_suspend(priv->trans, false);
 384
 385         goto out;
 386
 387  error:
 388         priv->wowlan = false;
 389         iwlagn_prepare_restart(priv);
 390         ieee80211_restart_hw(priv->hw);
 391  out:
 392         mutex_unlock(&priv->mutex);
 393         IWL_DEBUG_MAC80211(priv, "leave\n");
 394
 395         return ret;
 396 }
 397
 398 struct iwl_resume_data {
 399         struct iwl_priv *priv;
 400         struct iwlagn_wowlan_status *cmd;
 401         bool valid;
 402 };
 403
 404 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 405                                  struct iwl_rx_packet *pkt, void *data)
 406 {
 407         struct iwl_resume_data *resume_data = data;
 408         struct iwl_priv *priv = resume_data->priv;
 409
 410         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 411                 IWL_ERR(priv, "rx wrong size data\n");
 412                 return true;
 413         }
 414         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 415         resume_data->valid = true;
 416
 417         return true;
 418 }
 419
 420 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 421 {
 422         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 423         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 424         struct ieee80211_vif *vif;
 425         u32 base;
 426         int ret;
 427         enum iwl_d3_status d3_status;
 428         struct error_table_start {
 429                 /* cf. struct iwl_error_event_table */
 430                 u32 valid;
 431                 u32 error_id;
 432         } err_info;
 433         struct iwl_notification_wait status_wait;
 434         static const u8 status_cmd[] = {
 435                 REPLY_WOWLAN_GET_STATUS,
 436         };
 437         struct iwlagn_wowlan_status status_data = {};
 438         struct iwl_resume_data resume_data = {
 439                 .priv = priv,
 440                 .cmd = &status_data,
 441                 .valid = false,
 442         };
 443         struct cfg80211_wowlan_wakeup wakeup = {
 444                 .pattern_idx = -1,
 445         };
 446 #ifdef CONFIG_IWLWIFI_DEBUGFS
 447         const struct fw_img *img;
 448 #endif
 449
 450         IWL_DEBUG_MAC80211(priv, "enter\n");
 451         mutex_lock(&priv->mutex);
 452
 453         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 454         vif = ctx->vif;
 455
 456         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
 457         if (ret)
 458                 goto out_unlock;
 459
 460         if (d3_status != IWL_D3_STATUS_ALIVE) {
 461                 IWL_INFO(priv, "Device was reset during suspend\n");
 462                 goto out_unlock;
 463         }
 464
 465         /* uCode is no longer operating by itself */
 466         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 467                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 468
 469         base = priv->device_pointers.error_event_table;
 470         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 471                 IWL_WARN(priv, "Invalid error table during resume!\n");
 472                 goto out_unlock;
 473         }
 474
 475         iwl_trans_read_mem_bytes(priv->trans, base,
 476                                  &err_info, sizeof(err_info));
 477
 478         if (err_info.valid) {
 479                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 480                          err_info.valid, err_info.error_id);
 481                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 482                         wakeup.rfkill_release = true;
 483                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 484                                                        GFP_KERNEL);
 485                 }
 486                 goto out_unlock;
 487         }
 488
 489 #ifdef CONFIG_IWLWIFI_DEBUGFS
 490         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 491         if (!priv->wowlan_sram)
 492                 priv->wowlan_sram =
 493                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 494                                 GFP_KERNEL);
 495
 496         if (priv->wowlan_sram)
 497                 iwl_trans_read_mem(priv->trans, 0x800000,
 498                                    priv->wowlan_sram,
 499                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 500 #endif
 501
 502         /*
 503          * This is very strange. The GET_STATUS command is sent but the device
 504          * doesn't reply properly, it seems it doesn't close the RBD so one is
 505          * always left open ... As a result, we need to send another command
 506          * and have to reset the driver afterwards. As we need to switch to
 507          * runtime firmware again that'll happen.
 508          */
 509
 510         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 511                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 512                                    &resume_data);
 513
 514         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 515         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 516         /* an RBD is left open in the firmware now! */
 517
 518         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 519         if (ret)
 520                 goto out_unlock;
 521
 522         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 523                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 524                 struct cfg80211_wowlan_wakeup *wakeup_report;
 525
 526                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 527
 528                 if (reasons) {
 529                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 530                                 wakeup.magic_pkt = true;
 531                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 532                                 wakeup.pattern_idx = status_data.pattern_number;
 533                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 534                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 535                                 wakeup.disconnect = true;
 536                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 537                                 wakeup.gtk_rekey_failure = true;
 538                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 539                                 wakeup.eap_identity_req = true;
 540                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 541                                 wakeup.four_way_handshake = true;
 542                         wakeup_report = &wakeup;
 543                 } else {
 544                         wakeup_report = NULL;
 545                 }
 546
 547                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 548         }
 549
 550         priv->wowlan = false;
 551
 552         iwlagn_prepare_restart(priv);
 553
 554         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 555         iwl_connection_init_rx_config(priv, ctx);
 556         iwlagn_set_rxon_chain(priv, ctx);
 557
 558  out_unlock:
 559         mutex_unlock(&priv->mutex);
 560         IWL_DEBUG_MAC80211(priv, "leave\n");
 561
 562         ieee80211_resume_disconnect(vif);
 563
 564         return 1;
 565 }
 566
 567 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 568 {
 569         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 570
 571         device_set_wakeup_enable(priv->trans->dev, enabled);
 572 }
 573 #endif
 574
 575 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 576                           struct ieee80211_tx_control *control,
 577                           struct sk_buff *skb)
 578 {
 579         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 580
 581         if (iwlagn_tx_skb(priv, control->sta, skb))
 582                 ieee80211_free_txskb(hw, skb);
 583 }
 584
 585 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 586                                        struct ieee80211_vif *vif,
 587                                        struct ieee80211_key_conf *keyconf,
 588                                        struct ieee80211_sta *sta,
 589                                        u32 iv32, u16 *phase1key)
 590 {
 591         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 592
 593         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 594 }
 595
 596 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 597                               struct ieee80211_vif *vif,
 598                               struct ieee80211_sta *sta,
 599                               struct ieee80211_key_conf *key)
 600 {
 601         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 602         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 603         struct iwl_rxon_context *ctx = vif_priv->ctx;
 604         int ret;
 605         bool is_default_wep_key = false;
 606
 607         IWL_DEBUG_MAC80211(priv, "enter\n");
 608
 609         if (iwlwifi_mod_params.sw_crypto) {
 610                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 611                 return -EOPNOTSUPP;
 612         }
 613
 614         switch (key->cipher) {
 615         case WLAN_CIPHER_SUITE_TKIP:
 616                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 617                 /* fall through */
 618         case WLAN_CIPHER_SUITE_CCMP:
 619                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 620                 break;
 621         default:
 622                 break;
 623         }
 624
 625         /*
 626          * We could program these keys into the hardware as well, but we
 627          * don't expect much multicast traffic in IBSS and having keys
 628          * for more stations is probably more useful.
 629          *
 630          * Mark key TX-only and return 0.
 631          */
 632         if (vif->type == NL80211_IFTYPE_ADHOC &&
 633             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 634                 key->hw_key_idx = WEP_INVALID_OFFSET;
 635                 return 0;
 636         }
 637
 638         /* If they key was TX-only, accept deletion */
 639         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 640                 return 0;
 641
 642         mutex_lock(&priv->mutex);
 643         iwl_scan_cancel_timeout(priv, 100);
 644
 645         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 646
 647         /*
 648          * If we are getting WEP group key and we didn't receive any key mapping
 649          * so far, we are in legacy wep mode (group key only), otherwise we are
 650          * in 1X mode.
 651          * In legacy wep mode, we use another host command to the uCode.
 652          */
 653         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 654              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 655                 if (cmd == SET_KEY)
 656                         is_default_wep_key = !ctx->key_mapping_keys;
 657                 else
 658                         is_default_wep_key =
 659                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 660         }
 661
 662
 663         switch (cmd) {
 664         case SET_KEY:
 665                 if (is_default_wep_key) {
 666                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 667                         break;
 668                 }
 669                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 670                 if (ret) {
 671                         /*
 672                          * can't add key for RX, but we don't need it
 673                          * in the device for TX so still return 0
 674                          */
 675                         ret = 0;
 676                         key->hw_key_idx = WEP_INVALID_OFFSET;
 677                 }
 678
 679                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 680                 break;
 681         case DISABLE_KEY:
 682                 if (is_default_wep_key)
 683                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 684                 else
 685                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 686
 687                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 688                 break;
 689         default:
 690                 ret = -EINVAL;
 691         }
 692
 693         mutex_unlock(&priv->mutex);
 694         IWL_DEBUG_MAC80211(priv, "leave\n");
 695
 696         return ret;
 697 }
 698
 699 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 700 {
 701         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 702                 return false;
 703         return true;
 704 }
 705
 706 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 707 {
 708         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 709                 return false;
 710         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 711                 return true;
 712
 713         /* disabled by default */
 714         return false;
 715 }
 716
 717 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 718                                    struct ieee80211_vif *vif,
 719                                    enum ieee80211_ampdu_mlme_action action,
 720                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 721                                    u8 buf_size)
 722 {
 723         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 724         int ret = -EINVAL;
 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(priv->cfg))
 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(priv->cfg))
 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_channel_switch *ch_switch)
 945 {
 946         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 947         struct ieee80211_conf *conf = &hw->conf;
 948         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 949         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 950         /*
 951          * MULTI-FIXME
 952          * When we add support for multiple interfaces, we need to
 953          * revisit this. The channel switch command in the device
 954          * only affects the BSS context, but what does that really
 955          * mean? And what if we get a CSA on the second interface?
 956          * This needs a lot of work.
 957          */
 958         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 959         u16 ch;
 960
 961         IWL_DEBUG_MAC80211(priv, "enter\n");
 962
 963         mutex_lock(&priv->mutex);
 964
 965         if (iwl_is_rfkill(priv))
 966                 goto out;
 967
 968         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 969             test_bit(STATUS_SCANNING, &priv->status) ||
 970             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 971                 goto out;
 972
 973         if (!iwl_is_associated_ctx(ctx))
 974                 goto out;
 975
 976         if (!priv->lib->set_channel_switch)
 977                 goto out;
 978
 979         ch = channel->hw_value;
 980         if (le16_to_cpu(ctx->active.channel) == ch)
 981                 goto out;
 982
 983         priv->current_ht_config.smps = conf->smps_mode;
 984
 985         /* Configure HT40 channels */
 986         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 987         case NL80211_CHAN_NO_HT:
 988         case NL80211_CHAN_HT20:
 989                 ctx->ht.is_40mhz = false;
 990                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 991                 break;
 992         case NL80211_CHAN_HT40MINUS:
 993                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 994                 ctx->ht.is_40mhz = true;
 995                 break;
 996         case NL80211_CHAN_HT40PLUS:
 997                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 998                 ctx->ht.is_40mhz = true;
 999                 break;
1000         }
1001
1002         if ((le16_to_cpu(ctx->staging.channel) != ch))
1003                 ctx->staging.flags = 0;
1004
1005         iwl_set_rxon_channel(priv, channel, ctx);
1006         iwl_set_rxon_ht(priv, ht_conf);
1007         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1008
1009         /*
1010          * at this point, staging_rxon has the
1011          * configuration for channel switch
1012          */
1013         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1014         priv->switch_channel = cpu_to_le16(ch);
1015         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1016                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1017                 priv->switch_channel = 0;
1018                 ieee80211_chswitch_done(ctx->vif, false);
1019         }
1020
1021 out:
1022         mutex_unlock(&priv->mutex);
1023         IWL_DEBUG_MAC80211(priv, "leave\n");
1024 }
1025
1026 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1027 {
1028         /*
1029          * MULTI-FIXME
1030          * See iwlagn_mac_channel_switch.
1031          */
1032         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1033
1034         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1035                 return;
1036
1037         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1038                 return;
1039
1040         if (ctx->vif)
1041                 ieee80211_chswitch_done(ctx->vif, is_success);
1042 }
1043
1044 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1045                                     unsigned int changed_flags,
1046                                     unsigned int *total_flags,
1047                                     u64 multicast)
1048 {
1049         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1050         __le32 filter_or = 0, filter_nand = 0;
1051         struct iwl_rxon_context *ctx;
1052
1053 #define CHK(test, flag) do { \
1054         if (*total_flags & (test))              \
1055                 filter_or |= (flag);            \
1056         else                                    \
1057                 filter_nand |= (flag);          \
1058         } while (0)
1059
1060         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1061                         changed_flags, *total_flags);
1062
1063         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1064         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1065         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1066         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1067
1068 #undef CHK
1069
1070         mutex_lock(&priv->mutex);
1071
1072         for_each_context(priv, ctx) {
1073                 ctx->staging.filter_flags &= ~filter_nand;
1074                 ctx->staging.filter_flags |= filter_or;
1075
1076                 /*
1077                  * Not committing directly because hardware can perform a scan,
1078                  * but we'll eventually commit the filter flags change anyway.
1079                  */
1080         }
1081
1082         mutex_unlock(&priv->mutex);
1083
1084         /*
1085          * Receiving all multicast frames is always enabled by the
1086          * default flags setup in iwl_connection_init_rx_config()
1087          * since we currently do not support programming multicast
1088          * filters into the device.
1089          */
1090         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1091                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1092 }
1093
1094 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1095                              u32 queues, bool drop)
1096 {
1097         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1098         u32 scd_queues;
1099
1100         mutex_lock(&priv->mutex);
1101         IWL_DEBUG_MAC80211(priv, "enter\n");
1102
1103         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1104                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1105                 goto done;
1106         }
1107         if (iwl_is_rfkill(priv)) {
1108                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1109                 goto done;
1110         }
1111
1112         scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1113         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1114                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1115
1116         if (vif)
1117                 scd_queues &= ~BIT(vif->hw_queue[IEEE80211_AC_VO]);
1118
1119         IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", scd_queues);
1120         if (iwlagn_txfifo_flush(priv, scd_queues)) {
1121                 IWL_ERR(priv, "flush request fail\n");
1122                 goto done;
1123         }
1124         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1125         iwl_trans_wait_tx_queue_empty(priv->trans, 0xffffffff);
1126 done:
1127         mutex_unlock(&priv->mutex);
1128         IWL_DEBUG_MAC80211(priv, "leave\n");
1129 }
1130
1131 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1132                                      struct ieee80211_vif *vif,
1133                                      enum ieee80211_rssi_event rssi_event)
1134 {
1135         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1136
1137         IWL_DEBUG_MAC80211(priv, "enter\n");
1138         mutex_lock(&priv->mutex);
1139
1140         if (priv->lib->bt_params &&
1141             priv->lib->bt_params->advanced_bt_coexist) {
1142                 if (rssi_event == RSSI_EVENT_LOW)
1143                         priv->bt_enable_pspoll = true;
1144                 else if (rssi_event == RSSI_EVENT_HIGH)
1145                         priv->bt_enable_pspoll = false;
1146
1147                 iwlagn_send_advance_bt_config(priv);
1148         } else {
1149                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1150                                 "ignoring RSSI callback\n");
1151         }
1152
1153         mutex_unlock(&priv->mutex);
1154         IWL_DEBUG_MAC80211(priv, "leave\n");
1155 }
1156
1157 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1158                               struct ieee80211_sta *sta, bool set)
1159 {
1160         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1161
1162         queue_work(priv->workqueue, &priv->beacon_update);
1163
1164         return 0;
1165 }
1166
1167 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1168                               struct ieee80211_vif *vif, u16 queue,
1169                               const struct ieee80211_tx_queue_params *params)
1170 {
1171         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1172         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1173         struct iwl_rxon_context *ctx = vif_priv->ctx;
1174         int q;
1175
1176         if (WARN_ON(!ctx))
1177                 return -EINVAL;
1178
1179         IWL_DEBUG_MAC80211(priv, "enter\n");
1180
1181         if (!iwl_is_ready_rf(priv)) {
1182                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1183                 return -EIO;
1184         }
1185
1186         if (queue >= AC_NUM) {
1187                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1188                 return 0;
1189         }
1190
1191         q = AC_NUM - 1 - queue;
1192
1193         mutex_lock(&priv->mutex);
1194
1195         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1196                 cpu_to_le16(params->cw_min);
1197         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1198                 cpu_to_le16(params->cw_max);
1199         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1200         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1201                         cpu_to_le16((params->txop * 32));
1202
1203         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1204
1205         mutex_unlock(&priv->mutex);
1206
1207         IWL_DEBUG_MAC80211(priv, "leave\n");
1208         return 0;
1209 }
1210
1211 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1212 {
1213         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1214
1215         return priv->ibss_manager == IWL_IBSS_MANAGER;
1216 }
1217
1218 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1219 {
1220         iwl_connection_init_rx_config(priv, ctx);
1221
1222         iwlagn_set_rxon_chain(priv, ctx);
1223
1224         return iwlagn_commit_rxon(priv, ctx);
1225 }
1226
1227 static int iwl_setup_interface(struct iwl_priv *priv,
1228                                struct iwl_rxon_context *ctx)
1229 {
1230         struct ieee80211_vif *vif = ctx->vif;
1231         int err, ac;
1232
1233         lockdep_assert_held(&priv->mutex);
1234
1235         /*
1236          * This variable will be correct only when there's just
1237          * a single context, but all code using it is for hardware
1238          * that supports only one context.
1239          */
1240         priv->iw_mode = vif->type;
1241
1242         ctx->is_active = true;
1243
1244         err = iwl_set_mode(priv, ctx);
1245         if (err) {
1246                 if (!ctx->always_active)
1247                         ctx->is_active = false;
1248                 return err;
1249         }
1250
1251         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1252             vif->type == NL80211_IFTYPE_ADHOC) {
1253                 /*
1254                  * pretend to have high BT traffic as long as we
1255                  * are operating in IBSS mode, as this will cause
1256                  * the rate scaling etc. to behave as intended.
1257                  */
1258                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1259         }
1260
1261         /* set up queue mappings */
1262         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1263                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1264
1265         if (vif->type == NL80211_IFTYPE_AP)
1266                 vif->cab_queue = ctx->mcast_queue;
1267         else
1268                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1269
1270         return 0;
1271 }
1272
1273 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1274                                     struct ieee80211_vif *vif)
1275 {
1276         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1277         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1278         struct iwl_rxon_context *tmp, *ctx = NULL;
1279         int err;
1280         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1281         bool reset = false;
1282
1283         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1284                            viftype, vif->addr);
1285
1286         mutex_lock(&priv->mutex);
1287
1288         if (!iwl_is_ready_rf(priv)) {
1289                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1290                 err = -EINVAL;
1291                 goto out;
1292         }
1293
1294         for_each_context(priv, tmp) {
1295                 u32 possible_modes =
1296                         tmp->interface_modes | tmp->exclusive_interface_modes;
1297
1298                 if (tmp->vif) {
1299                         /* On reset we need to add the same interface again */
1300                         if (tmp->vif == vif) {
1301                                 reset = true;
1302                                 ctx = tmp;
1303                                 break;
1304                         }
1305
1306                         /* check if this busy context is exclusive */
1307                         if (tmp->exclusive_interface_modes &
1308                                                 BIT(tmp->vif->type)) {
1309                                 err = -EINVAL;
1310                                 goto out;
1311                         }
1312                         continue;
1313                 }
1314
1315                 if (!(possible_modes & BIT(viftype)))
1316                         continue;
1317
1318                 /* have maybe usable context w/o interface */
1319                 ctx = tmp;
1320                 break;
1321         }
1322
1323         if (!ctx) {
1324                 err = -EOPNOTSUPP;
1325                 goto out;
1326         }
1327
1328         vif_priv->ctx = ctx;
1329         ctx->vif = vif;
1330
1331         /*
1332          * In SNIFFER device type, the firmware reports the FCS to
1333          * the host, rather than snipping it off. Unfortunately,
1334          * mac80211 doesn't (yet) provide a per-packet flag for
1335          * this, so that we have to set the hardware flag based
1336          * on the interfaces added. As the monitor interface can
1337          * only be present by itself, and will be removed before
1338          * other interfaces are added, this is safe.
1339          */
1340         if (vif->type == NL80211_IFTYPE_MONITOR)
1341                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1342         else
1343                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1344
1345         err = iwl_setup_interface(priv, ctx);
1346         if (!err || reset)
1347                 goto out;
1348
1349         ctx->vif = NULL;
1350         priv->iw_mode = NL80211_IFTYPE_STATION;
1351  out:
1352         mutex_unlock(&priv->mutex);
1353
1354         IWL_DEBUG_MAC80211(priv, "leave\n");
1355         return err;
1356 }
1357
1358 static void iwl_teardown_interface(struct iwl_priv *priv,
1359                                    struct ieee80211_vif *vif,
1360                                    bool mode_change)
1361 {
1362         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1363
1364         lockdep_assert_held(&priv->mutex);
1365
1366         if (priv->scan_vif == vif) {
1367                 iwl_scan_cancel_timeout(priv, 200);
1368                 iwl_force_scan_end(priv);
1369         }
1370
1371         if (!mode_change) {
1372                 iwl_set_mode(priv, ctx);
1373                 if (!ctx->always_active)
1374                         ctx->is_active = false;
1375         }
1376
1377         /*
1378          * When removing the IBSS interface, overwrite the
1379          * BT traffic load with the stored one from the last
1380          * notification, if any. If this is a device that
1381          * doesn't implement this, this has no effect since
1382          * both values are the same and zero.
1383          */
1384         if (vif->type == NL80211_IFTYPE_ADHOC)
1385                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1386 }
1387
1388 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1389                               struct ieee80211_vif *vif)
1390 {
1391         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1392         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1393
1394         IWL_DEBUG_MAC80211(priv, "enter\n");
1395
1396         mutex_lock(&priv->mutex);
1397
1398         if (WARN_ON(ctx->vif != vif)) {
1399                 struct iwl_rxon_context *tmp;
1400                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1401                 for_each_context(priv, tmp)
1402                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1403                                 tmp->ctxid, tmp, tmp->vif);
1404         }
1405         ctx->vif = NULL;
1406
1407         iwl_teardown_interface(priv, vif, false);
1408
1409         mutex_unlock(&priv->mutex);
1410
1411         IWL_DEBUG_MAC80211(priv, "leave\n");
1412
1413 }
1414
1415 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1416                                        struct ieee80211_vif *vif,
1417                                        enum nl80211_iftype newtype, bool newp2p)
1418 {
1419         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1420         struct iwl_rxon_context *ctx, *tmp;
1421         enum nl80211_iftype newviftype = newtype;
1422         u32 interface_modes;
1423         int err;
1424
1425         IWL_DEBUG_MAC80211(priv, "enter\n");
1426
1427         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1428
1429         mutex_lock(&priv->mutex);
1430
1431         ctx = iwl_rxon_ctx_from_vif(vif);
1432
1433         /*
1434          * To simplify this code, only support changes on the
1435          * BSS context. The PAN context is usually reassigned
1436          * by creating/removing P2P interfaces anyway.
1437          */
1438         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1439                 err = -EBUSY;
1440                 goto out;
1441         }
1442
1443         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1444                 /*
1445                  * Huh? But wait ... this can maybe happen when
1446                  * we're in the middle of a firmware restart!
1447                  */
1448                 err = -EBUSY;
1449                 goto out;
1450         }
1451
1452         /* Check if the switch is supported in the same context */
1453         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1454         if (!(interface_modes & BIT(newtype))) {
1455                 err = -EBUSY;
1456                 goto out;
1457         }
1458
1459         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1460                 for_each_context(priv, tmp) {
1461                         if (ctx == tmp)
1462                                 continue;
1463
1464                         if (!tmp->is_active)
1465                                 continue;
1466
1467                         /*
1468                          * The current mode switch would be exclusive, but
1469                          * another context is active ... refuse the switch.
1470                          */
1471                         err = -EBUSY;
1472                         goto out;
1473                 }
1474         }
1475
1476         /* success */
1477         iwl_teardown_interface(priv, vif, true);
1478         vif->type = newviftype;
1479         vif->p2p = newp2p;
1480         err = iwl_setup_interface(priv, ctx);
1481         WARN_ON(err);
1482         /*
1483          * We've switched internally, but submitting to the
1484          * device may have failed for some reason. Mask this
1485          * error, because otherwise mac80211 will not switch
1486          * (and set the interface type back) and we'll be
1487          * out of sync with it.
1488          */
1489         err = 0;
1490
1491  out:
1492         mutex_unlock(&priv->mutex);
1493         IWL_DEBUG_MAC80211(priv, "leave\n");
1494
1495         return err;
1496 }
1497
1498 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1499                               struct ieee80211_vif *vif,
1500                               struct ieee80211_scan_request *hw_req)
1501 {
1502         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1503         struct cfg80211_scan_request *req = &hw_req->req;
1504         int ret;
1505
1506         IWL_DEBUG_MAC80211(priv, "enter\n");
1507
1508         if (req->n_channels == 0)
1509                 return -EINVAL;
1510
1511         mutex_lock(&priv->mutex);
1512
1513         /*
1514          * If an internal scan is in progress, just set
1515          * up the scan_request as per above.
1516          */
1517         if (priv->scan_type != IWL_SCAN_NORMAL) {
1518                 IWL_DEBUG_SCAN(priv,
1519                                "SCAN request during internal scan - defer\n");
1520                 priv->scan_request = req;
1521                 priv->scan_vif = vif;
1522                 ret = 0;
1523         } else {
1524                 priv->scan_request = req;
1525                 priv->scan_vif = vif;
1526                 /*
1527                  * mac80211 will only ask for one band at a time
1528                  * so using channels[0] here is ok
1529                  */
1530                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1531                                         req->channels[0]->band);
1532                 if (ret) {
1533                         priv->scan_request = NULL;
1534                         priv->scan_vif = NULL;
1535                 }
1536         }
1537
1538         IWL_DEBUG_MAC80211(priv, "leave\n");
1539
1540         mutex_unlock(&priv->mutex);
1541
1542         return ret;
1543 }
1544
1545 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1546 {
1547         struct iwl_addsta_cmd cmd = {
1548                 .mode = STA_CONTROL_MODIFY_MSK,
1549                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1550                 .sta.sta_id = sta_id,
1551         };
1552
1553         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1554 }
1555
1556 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1557                                   struct ieee80211_vif *vif,
1558                                   enum sta_notify_cmd cmd,
1559                                   struct ieee80211_sta *sta)
1560 {
1561         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1562         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1563         int sta_id;
1564
1565         IWL_DEBUG_MAC80211(priv, "enter\n");
1566
1567         switch (cmd) {
1568         case STA_NOTIFY_SLEEP:
1569                 WARN_ON(!sta_priv->client);
1570                 sta_priv->asleep = true;
1571                 if (atomic_read(&sta_priv->pending_frames) > 0)
1572                         ieee80211_sta_block_awake(hw, sta, true);
1573                 break;
1574         case STA_NOTIFY_AWAKE:
1575                 WARN_ON(!sta_priv->client);
1576                 if (!sta_priv->asleep)
1577                         break;
1578                 sta_priv->asleep = false;
1579                 sta_id = iwl_sta_id(sta);
1580                 if (sta_id != IWL_INVALID_STATION)
1581                         iwl_sta_modify_ps_wake(priv, sta_id);
1582                 break;
1583         default:
1584                 break;
1585         }
1586         IWL_DEBUG_MAC80211(priv, "leave\n");
1587 }
1588
1589 const struct ieee80211_ops iwlagn_hw_ops = {
1590         .tx = iwlagn_mac_tx,
1591         .start = iwlagn_mac_start,
1592         .stop = iwlagn_mac_stop,
1593 #ifdef CONFIG_PM_SLEEP
1594         .suspend = iwlagn_mac_suspend,
1595         .resume = iwlagn_mac_resume,
1596         .set_wakeup = iwlagn_mac_set_wakeup,
1597 #endif
1598         .add_interface = iwlagn_mac_add_interface,
1599         .remove_interface = iwlagn_mac_remove_interface,
1600         .change_interface = iwlagn_mac_change_interface,
1601         .config = iwlagn_mac_config,
1602         .configure_filter = iwlagn_configure_filter,
1603         .set_key = iwlagn_mac_set_key,
1604         .update_tkip_key = iwlagn_mac_update_tkip_key,
1605         .set_rekey_data = iwlagn_mac_set_rekey_data,
1606         .conf_tx = iwlagn_mac_conf_tx,
1607         .bss_info_changed = iwlagn_bss_info_changed,
1608         .ampdu_action = iwlagn_mac_ampdu_action,
1609         .hw_scan = iwlagn_mac_hw_scan,
1610         .sta_notify = iwlagn_mac_sta_notify,
1611         .sta_state = iwlagn_mac_sta_state,
1612         .channel_switch = iwlagn_mac_channel_switch,
1613         .flush = iwlagn_mac_flush,
1614         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1615         .rssi_callback = iwlagn_mac_rssi_callback,
1616         .set_tim = iwlagn_mac_set_tim,
1617 };
1618
1619 /* This function both allocates and initializes hw and priv. */
1620 struct ieee80211_hw *iwl_alloc_all(void)
1621 {
1622         struct iwl_priv *priv;
1623         struct iwl_op_mode *op_mode;
1624         /* mac80211 allocates memory for this device instance, including
1625          *   space for this driver's private structure */
1626         struct ieee80211_hw *hw;
1627
1628         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1629                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1630         if (!hw)
1631                 goto out;
1632
1633         op_mode = hw->priv;
1634         priv = IWL_OP_MODE_GET_DVM(op_mode);
1635         priv->hw = hw;
1636
1637 out:
1638         return hw;
1639 }