Pileus Git - ~andy/linux/blob - 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->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 129                              IEEE80211_HW_SUPPORTS_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         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 410
 411         if (len - 4 != sizeof(*resume_data->cmd)) {
 412                 IWL_ERR(priv, "rx wrong size data\n");
 413                 return true;
 414         }
 415         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 416         resume_data->valid = true;
 417
 418         return true;
 419 }
 420
 421 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 422 {
 423         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 424         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 425         struct ieee80211_vif *vif;
 426         u32 base;
 427         int ret;
 428         enum iwl_d3_status d3_status;
 429         struct error_table_start {
 430                 /* cf. struct iwl_error_event_table */
 431                 u32 valid;
 432                 u32 error_id;
 433         } err_info;
 434         struct iwl_notification_wait status_wait;
 435         static const u8 status_cmd[] = {
 436                 REPLY_WOWLAN_GET_STATUS,
 437         };
 438         struct iwlagn_wowlan_status status_data = {};
 439         struct iwl_resume_data resume_data = {
 440                 .priv = priv,
 441                 .cmd = &status_data,
 442                 .valid = false,
 443         };
 444         struct cfg80211_wowlan_wakeup wakeup = {
 445                 .pattern_idx = -1,
 446         };
 447 #ifdef CONFIG_IWLWIFI_DEBUGFS
 448         const struct fw_img *img;
 449 #endif
 450
 451         IWL_DEBUG_MAC80211(priv, "enter\n");
 452         mutex_lock(&priv->mutex);
 453
 454         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 455         vif = ctx->vif;
 456
 457         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
 458         if (ret)
 459                 goto out_unlock;
 460
 461         if (d3_status != IWL_D3_STATUS_ALIVE) {
 462                 IWL_INFO(priv, "Device was reset during suspend\n");
 463                 goto out_unlock;
 464         }
 465
 466         /* uCode is no longer operating by itself */
 467         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 468                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 469
 470         base = priv->device_pointers.error_event_table;
 471         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 472                 IWL_WARN(priv, "Invalid error table during resume!\n");
 473                 goto out_unlock;
 474         }
 475
 476         iwl_trans_read_mem_bytes(priv->trans, base,
 477                                  &err_info, sizeof(err_info));
 478
 479         if (err_info.valid) {
 480                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 481                          err_info.valid, err_info.error_id);
 482                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 483                         wakeup.rfkill_release = true;
 484                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 485                                                        GFP_KERNEL);
 486                 }
 487                 goto out_unlock;
 488         }
 489
 490 #ifdef CONFIG_IWLWIFI_DEBUGFS
 491         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 492         if (!priv->wowlan_sram)
 493                 priv->wowlan_sram =
 494                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 495                                 GFP_KERNEL);
 496
 497         if (priv->wowlan_sram)
 498                 iwl_trans_read_mem(priv->trans, 0x800000,
 499                                    priv->wowlan_sram,
 500                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 501 #endif
 502
 503         /*
 504          * This is very strange. The GET_STATUS command is sent but the device
 505          * doesn't reply properly, it seems it doesn't close the RBD so one is
 506          * always left open ... As a result, we need to send another command
 507          * and have to reset the driver afterwards. As we need to switch to
 508          * runtime firmware again that'll happen.
 509          */
 510
 511         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 512                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 513                                    &resume_data);
 514
 515         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 516         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 517         /* an RBD is left open in the firmware now! */
 518
 519         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 520         if (ret)
 521                 goto out_unlock;
 522
 523         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 524                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 525                 struct cfg80211_wowlan_wakeup *wakeup_report;
 526
 527                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 528
 529                 if (reasons) {
 530                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 531                                 wakeup.magic_pkt = true;
 532                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 533                                 wakeup.pattern_idx = status_data.pattern_number;
 534                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 535                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 536                                 wakeup.disconnect = true;
 537                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 538                                 wakeup.gtk_rekey_failure = true;
 539                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 540                                 wakeup.eap_identity_req = true;
 541                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 542                                 wakeup.four_way_handshake = true;
 543                         wakeup_report = &wakeup;
 544                 } else {
 545                         wakeup_report = NULL;
 546                 }
 547
 548                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 549         }
 550
 551         priv->wowlan = false;
 552
 553         iwlagn_prepare_restart(priv);
 554
 555         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 556         iwl_connection_init_rx_config(priv, ctx);
 557         iwlagn_set_rxon_chain(priv, ctx);
 558
 559  out_unlock:
 560         mutex_unlock(&priv->mutex);
 561         IWL_DEBUG_MAC80211(priv, "leave\n");
 562
 563         ieee80211_resume_disconnect(vif);
 564
 565         return 1;
 566 }
 567
 568 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 569 {
 570         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 571
 572         device_set_wakeup_enable(priv->trans->dev, enabled);
 573 }
 574 #endif
 575
 576 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 577                           struct ieee80211_tx_control *control,
 578                           struct sk_buff *skb)
 579 {
 580         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 581
 582         if (iwlagn_tx_skb(priv, control->sta, skb))
 583                 ieee80211_free_txskb(hw, skb);
 584 }
 585
 586 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 587                                        struct ieee80211_vif *vif,
 588                                        struct ieee80211_key_conf *keyconf,
 589                                        struct ieee80211_sta *sta,
 590                                        u32 iv32, u16 *phase1key)
 591 {
 592         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 593
 594         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 595 }
 596
 597 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 598                               struct ieee80211_vif *vif,
 599                               struct ieee80211_sta *sta,
 600                               struct ieee80211_key_conf *key)
 601 {
 602         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 603         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 604         struct iwl_rxon_context *ctx = vif_priv->ctx;
 605         int ret;
 606         bool is_default_wep_key = false;
 607
 608         IWL_DEBUG_MAC80211(priv, "enter\n");
 609
 610         if (iwlwifi_mod_params.sw_crypto) {
 611                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 612                 return -EOPNOTSUPP;
 613         }
 614
 615         switch (key->cipher) {
 616         case WLAN_CIPHER_SUITE_TKIP:
 617                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 618                 /* fall through */
 619         case WLAN_CIPHER_SUITE_CCMP:
 620                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 621                 break;
 622         default:
 623                 break;
 624         }
 625
 626         /*
 627          * We could program these keys into the hardware as well, but we
 628          * don't expect much multicast traffic in IBSS and having keys
 629          * for more stations is probably more useful.
 630          *
 631          * Mark key TX-only and return 0.
 632          */
 633         if (vif->type == NL80211_IFTYPE_ADHOC &&
 634             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 635                 key->hw_key_idx = WEP_INVALID_OFFSET;
 636                 return 0;
 637         }
 638
 639         /* If they key was TX-only, accept deletion */
 640         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 641                 return 0;
 642
 643         mutex_lock(&priv->mutex);
 644         iwl_scan_cancel_timeout(priv, 100);
 645
 646         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 647
 648         /*
 649          * If we are getting WEP group key and we didn't receive any key mapping
 650          * so far, we are in legacy wep mode (group key only), otherwise we are
 651          * in 1X mode.
 652          * In legacy wep mode, we use another host command to the uCode.
 653          */
 654         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 655              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 656                 if (cmd == SET_KEY)
 657                         is_default_wep_key = !ctx->key_mapping_keys;
 658                 else
 659                         is_default_wep_key =
 660                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 661         }
 662
 663
 664         switch (cmd) {
 665         case SET_KEY:
 666                 if (is_default_wep_key) {
 667                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 668                         break;
 669                 }
 670                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 671                 if (ret) {
 672                         /*
 673                          * can't add key for RX, but we don't need it
 674                          * in the device for TX so still return 0
 675                          */
 676                         ret = 0;
 677                         key->hw_key_idx = WEP_INVALID_OFFSET;
 678                 }
 679
 680                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 681                 break;
 682         case DISABLE_KEY:
 683                 if (is_default_wep_key)
 684                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 685                 else
 686                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 687
 688                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 689                 break;
 690         default:
 691                 ret = -EINVAL;
 692         }
 693
 694         mutex_unlock(&priv->mutex);
 695         IWL_DEBUG_MAC80211(priv, "leave\n");
 696
 697         return ret;
 698 }
 699
 700 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 701                                    struct ieee80211_vif *vif,
 702                                    enum ieee80211_ampdu_mlme_action action,
 703                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 704                                    u8 buf_size)
 705 {
 706         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 707         int ret = -EINVAL;
 708         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 709
 710         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 711                      sta->addr, tid);
 712
 713         if (!(priv->nvm_data->sku_cap_11n_enable))
 714                 return -EACCES;
 715
 716         IWL_DEBUG_MAC80211(priv, "enter\n");
 717         mutex_lock(&priv->mutex);
 718
 719         switch (action) {
 720         case IEEE80211_AMPDU_RX_START:
 721                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 722                         break;
 723                 IWL_DEBUG_HT(priv, "start Rx\n");
 724                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 725                 break;
 726         case IEEE80211_AMPDU_RX_STOP:
 727                 IWL_DEBUG_HT(priv, "stop Rx\n");
 728                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 729                 break;
 730         case IEEE80211_AMPDU_TX_START:
 731                 if (!priv->trans->ops->txq_enable)
 732                         break;
 733                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 734                         break;
 735                 IWL_DEBUG_HT(priv, "start Tx\n");
 736                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 737                 break;
 738         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 739         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 740                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 741                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 742                 break;
 743         case IEEE80211_AMPDU_TX_STOP_CONT:
 744                 IWL_DEBUG_HT(priv, "stop Tx\n");
 745                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 746                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 747                         priv->agg_tids_count--;
 748                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 749                                      priv->agg_tids_count);
 750                 }
 751                 if (!priv->agg_tids_count &&
 752                     priv->hw_params.use_rts_for_aggregation) {
 753                         /*
 754                          * switch off RTS/CTS if it was previously enabled
 755                          */
 756                         sta_priv->lq_sta.lq.general_params.flags &=
 757                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 758                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 759                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 760                 }
 761                 break;
 762         case IEEE80211_AMPDU_TX_OPERATIONAL:
 763                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 764                 break;
 765         }
 766         mutex_unlock(&priv->mutex);
 767         IWL_DEBUG_MAC80211(priv, "leave\n");
 768         return ret;
 769 }
 770
 771 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 772                               struct ieee80211_vif *vif,
 773                               struct ieee80211_sta *sta)
 774 {
 775         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 776         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 777         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 778         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 779         int ret;
 780         u8 sta_id;
 781
 782         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 783                         sta->addr);
 784         sta_priv->sta_id = IWL_INVALID_STATION;
 785
 786         atomic_set(&sta_priv->pending_frames, 0);
 787         if (vif->type == NL80211_IFTYPE_AP)
 788                 sta_priv->client = true;
 789
 790         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 791                                      is_ap, sta, &sta_id);
 792         if (ret) {
 793                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 794                         sta->addr, ret);
 795                 /* Should we return success if return code is EEXIST ? */
 796                 return ret;
 797         }
 798
 799         sta_priv->sta_id = sta_id;
 800
 801         return 0;
 802 }
 803
 804 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 805                                  struct ieee80211_vif *vif,
 806                                  struct ieee80211_sta *sta)
 807 {
 808         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 809         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 810         int ret;
 811
 812         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 813
 814         if (vif->type == NL80211_IFTYPE_STATION) {
 815                 /*
 816                  * Station will be removed from device when the RXON
 817                  * is set to unassociated -- just deactivate it here
 818                  * to avoid re-programming it.
 819                  */
 820                 ret = 0;
 821                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 822         } else {
 823                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 824                 if (ret)
 825                         IWL_DEBUG_QUIET_RFKILL(priv,
 826                                 "Error removing station %pM\n", sta->addr);
 827         }
 828         return ret;
 829 }
 830
 831 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 832                                 struct ieee80211_vif *vif,
 833                                 struct ieee80211_sta *sta,
 834                                 enum ieee80211_sta_state old_state,
 835                                 enum ieee80211_sta_state new_state)
 836 {
 837         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 838         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 839         enum {
 840                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 841         } op = NONE;
 842         int ret;
 843
 844         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 845                            sta->addr, old_state, new_state);
 846
 847         mutex_lock(&priv->mutex);
 848         if (vif->type == NL80211_IFTYPE_STATION) {
 849                 if (old_state == IEEE80211_STA_NOTEXIST &&
 850                     new_state == IEEE80211_STA_NONE)
 851                         op = ADD;
 852                 else if (old_state == IEEE80211_STA_NONE &&
 853                          new_state == IEEE80211_STA_NOTEXIST)
 854                         op = REMOVE;
 855                 else if (old_state == IEEE80211_STA_AUTH &&
 856                          new_state == IEEE80211_STA_ASSOC)
 857                         op = HT_RATE_INIT;
 858         } else {
 859                 if (old_state == IEEE80211_STA_AUTH &&
 860                     new_state == IEEE80211_STA_ASSOC)
 861                         op = ADD_RATE_INIT;
 862                 else if (old_state == IEEE80211_STA_ASSOC &&
 863                          new_state == IEEE80211_STA_AUTH)
 864                         op = REMOVE;
 865         }
 866
 867         switch (op) {
 868         case ADD:
 869                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 870                 if (ret)
 871                         break;
 872                 /*
 873                  * Clear the in-progress flag, the AP station entry was added
 874                  * but we'll initialize LQ only when we've associated (which
 875                  * would also clear the in-progress flag). This is necessary
 876                  * in case we never initialize LQ because association fails.
 877                  */
 878                 spin_lock_bh(&priv->sta_lock);
 879                 priv->stations[iwl_sta_id(sta)].used &=
 880                         ~IWL_STA_UCODE_INPROGRESS;
 881                 spin_unlock_bh(&priv->sta_lock);
 882                 break;
 883         case REMOVE:
 884                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 885                 break;
 886         case ADD_RATE_INIT:
 887                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 888                 if (ret)
 889                         break;
 890                 /* Initialize rate scaling */
 891                 IWL_DEBUG_INFO(priv,
 892                                "Initializing rate scaling for station %pM\n",
 893                                sta->addr);
 894                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 895                 ret = 0;
 896                 break;
 897         case HT_RATE_INIT:
 898                 /* Initialize rate scaling */
 899                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 900                 if (ret)
 901                         break;
 902                 IWL_DEBUG_INFO(priv,
 903                                "Initializing rate scaling for station %pM\n",
 904                                sta->addr);
 905                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 906                 ret = 0;
 907                 break;
 908         default:
 909                 ret = 0;
 910                 break;
 911         }
 912
 913         /*
 914          * mac80211 might WARN if we fail, but due the way we
 915          * (badly) handle hard rfkill, we might fail here
 916          */
 917         if (iwl_is_rfkill(priv))
 918                 ret = 0;
 919
 920         mutex_unlock(&priv->mutex);
 921         IWL_DEBUG_MAC80211(priv, "leave\n");
 922
 923         return ret;
 924 }
 925
 926 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 927                                       struct ieee80211_channel_switch *ch_switch)
 928 {
 929         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 930         struct ieee80211_conf *conf = &hw->conf;
 931         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 932         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 933         /*
 934          * MULTI-FIXME
 935          * When we add support for multiple interfaces, we need to
 936          * revisit this. The channel switch command in the device
 937          * only affects the BSS context, but what does that really
 938          * mean? And what if we get a CSA on the second interface?
 939          * This needs a lot of work.
 940          */
 941         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 942         u16 ch;
 943
 944         IWL_DEBUG_MAC80211(priv, "enter\n");
 945
 946         mutex_lock(&priv->mutex);
 947
 948         if (iwl_is_rfkill(priv))
 949                 goto out;
 950
 951         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 952             test_bit(STATUS_SCANNING, &priv->status) ||
 953             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 954                 goto out;
 955
 956         if (!iwl_is_associated_ctx(ctx))
 957                 goto out;
 958
 959         if (!priv->lib->set_channel_switch)
 960                 goto out;
 961
 962         ch = channel->hw_value;
 963         if (le16_to_cpu(ctx->active.channel) == ch)
 964                 goto out;
 965
 966         priv->current_ht_config.smps = conf->smps_mode;
 967
 968         /* Configure HT40 channels */
 969         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 970         case NL80211_CHAN_NO_HT:
 971         case NL80211_CHAN_HT20:
 972                 ctx->ht.is_40mhz = false;
 973                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 974                 break;
 975         case NL80211_CHAN_HT40MINUS:
 976                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 977                 ctx->ht.is_40mhz = true;
 978                 break;
 979         case NL80211_CHAN_HT40PLUS:
 980                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 981                 ctx->ht.is_40mhz = true;
 982                 break;
 983         }
 984
 985         if ((le16_to_cpu(ctx->staging.channel) != ch))
 986                 ctx->staging.flags = 0;
 987
 988         iwl_set_rxon_channel(priv, channel, ctx);
 989         iwl_set_rxon_ht(priv, ht_conf);
 990         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 991
 992         /*
 993          * at this point, staging_rxon has the
 994          * configuration for channel switch
 995          */
 996         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 997         priv->switch_channel = cpu_to_le16(ch);
 998         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 999                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1000                 priv->switch_channel = 0;
1001                 ieee80211_chswitch_done(ctx->vif, false);
1002         }
1003
1004 out:
1005         mutex_unlock(&priv->mutex);
1006         IWL_DEBUG_MAC80211(priv, "leave\n");
1007 }
1008
1009 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1010 {
1011         /*
1012          * MULTI-FIXME
1013          * See iwlagn_mac_channel_switch.
1014          */
1015         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1016
1017         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1018                 return;
1019
1020         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1021                 return;
1022
1023         if (ctx->vif)
1024                 ieee80211_chswitch_done(ctx->vif, is_success);
1025 }
1026
1027 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1028                                     unsigned int changed_flags,
1029                                     unsigned int *total_flags,
1030                                     u64 multicast)
1031 {
1032         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1033         __le32 filter_or = 0, filter_nand = 0;
1034         struct iwl_rxon_context *ctx;
1035
1036 #define CHK(test, flag) do { \
1037         if (*total_flags & (test))              \
1038                 filter_or |= (flag);            \
1039         else                                    \
1040                 filter_nand |= (flag);          \
1041         } while (0)
1042
1043         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1044                         changed_flags, *total_flags);
1045
1046         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1047         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1048         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1049         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1050
1051 #undef CHK
1052
1053         mutex_lock(&priv->mutex);
1054
1055         for_each_context(priv, ctx) {
1056                 ctx->staging.filter_flags &= ~filter_nand;
1057                 ctx->staging.filter_flags |= filter_or;
1058
1059                 /*
1060                  * Not committing directly because hardware can perform a scan,
1061                  * but we'll eventually commit the filter flags change anyway.
1062                  */
1063         }
1064
1065         mutex_unlock(&priv->mutex);
1066
1067         /*
1068          * Receiving all multicast frames is always enabled by the
1069          * default flags setup in iwl_connection_init_rx_config()
1070          * since we currently do not support programming multicast
1071          * filters into the device.
1072          */
1073         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1074                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1075 }
1076
1077 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1078 {
1079         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1080
1081         mutex_lock(&priv->mutex);
1082         IWL_DEBUG_MAC80211(priv, "enter\n");
1083
1084         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1085                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1086                 goto done;
1087         }
1088         if (iwl_is_rfkill(priv)) {
1089                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1090                 goto done;
1091         }
1092
1093         /*
1094          * mac80211 will not push any more frames for transmit
1095          * until the flush is completed
1096          */
1097         if (drop) {
1098                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1099                 if (iwlagn_txfifo_flush(priv, 0)) {
1100                         IWL_ERR(priv, "flush request fail\n");
1101                         goto done;
1102                 }
1103         }
1104         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1105         iwl_trans_wait_tx_queue_empty(priv->trans);
1106 done:
1107         mutex_unlock(&priv->mutex);
1108         IWL_DEBUG_MAC80211(priv, "leave\n");
1109 }
1110
1111 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1112                                      struct ieee80211_vif *vif,
1113                                      enum ieee80211_rssi_event rssi_event)
1114 {
1115         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1116
1117         IWL_DEBUG_MAC80211(priv, "enter\n");
1118         mutex_lock(&priv->mutex);
1119
1120         if (priv->lib->bt_params &&
1121             priv->lib->bt_params->advanced_bt_coexist) {
1122                 if (rssi_event == RSSI_EVENT_LOW)
1123                         priv->bt_enable_pspoll = true;
1124                 else if (rssi_event == RSSI_EVENT_HIGH)
1125                         priv->bt_enable_pspoll = false;
1126
1127                 iwlagn_send_advance_bt_config(priv);
1128         } else {
1129                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1130                                 "ignoring RSSI callback\n");
1131         }
1132
1133         mutex_unlock(&priv->mutex);
1134         IWL_DEBUG_MAC80211(priv, "leave\n");
1135 }
1136
1137 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1138                               struct ieee80211_sta *sta, bool set)
1139 {
1140         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1141
1142         queue_work(priv->workqueue, &priv->beacon_update);
1143
1144         return 0;
1145 }
1146
1147 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1148                               struct ieee80211_vif *vif, u16 queue,
1149                               const struct ieee80211_tx_queue_params *params)
1150 {
1151         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1152         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1153         struct iwl_rxon_context *ctx = vif_priv->ctx;
1154         int q;
1155
1156         if (WARN_ON(!ctx))
1157                 return -EINVAL;
1158
1159         IWL_DEBUG_MAC80211(priv, "enter\n");
1160
1161         if (!iwl_is_ready_rf(priv)) {
1162                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1163                 return -EIO;
1164         }
1165
1166         if (queue >= AC_NUM) {
1167                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1168                 return 0;
1169         }
1170
1171         q = AC_NUM - 1 - queue;
1172
1173         mutex_lock(&priv->mutex);
1174
1175         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1176                 cpu_to_le16(params->cw_min);
1177         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1178                 cpu_to_le16(params->cw_max);
1179         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1180         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1181                         cpu_to_le16((params->txop * 32));
1182
1183         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1184
1185         mutex_unlock(&priv->mutex);
1186
1187         IWL_DEBUG_MAC80211(priv, "leave\n");
1188         return 0;
1189 }
1190
1191 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1192 {
1193         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1194
1195         return priv->ibss_manager == IWL_IBSS_MANAGER;
1196 }
1197
1198 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1199 {
1200         iwl_connection_init_rx_config(priv, ctx);
1201
1202         iwlagn_set_rxon_chain(priv, ctx);
1203
1204         return iwlagn_commit_rxon(priv, ctx);
1205 }
1206
1207 static int iwl_setup_interface(struct iwl_priv *priv,
1208                                struct iwl_rxon_context *ctx)
1209 {
1210         struct ieee80211_vif *vif = ctx->vif;
1211         int err, ac;
1212
1213         lockdep_assert_held(&priv->mutex);
1214
1215         /*
1216          * This variable will be correct only when there's just
1217          * a single context, but all code using it is for hardware
1218          * that supports only one context.
1219          */
1220         priv->iw_mode = vif->type;
1221
1222         ctx->is_active = true;
1223
1224         err = iwl_set_mode(priv, ctx);
1225         if (err) {
1226                 if (!ctx->always_active)
1227                         ctx->is_active = false;
1228                 return err;
1229         }
1230
1231         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1232             vif->type == NL80211_IFTYPE_ADHOC) {
1233                 /*
1234                  * pretend to have high BT traffic as long as we
1235                  * are operating in IBSS mode, as this will cause
1236                  * the rate scaling etc. to behave as intended.
1237                  */
1238                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1239         }
1240
1241         /* set up queue mappings */
1242         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1243                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1244
1245         if (vif->type == NL80211_IFTYPE_AP)
1246                 vif->cab_queue = ctx->mcast_queue;
1247         else
1248                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1249
1250         return 0;
1251 }
1252
1253 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1254                                     struct ieee80211_vif *vif)
1255 {
1256         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1257         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1258         struct iwl_rxon_context *tmp, *ctx = NULL;
1259         int err;
1260         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1261         bool reset = false;
1262
1263         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1264                            viftype, vif->addr);
1265
1266         mutex_lock(&priv->mutex);
1267
1268         if (!iwl_is_ready_rf(priv)) {
1269                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1270                 err = -EINVAL;
1271                 goto out;
1272         }
1273
1274         for_each_context(priv, tmp) {
1275                 u32 possible_modes =
1276                         tmp->interface_modes | tmp->exclusive_interface_modes;
1277
1278                 if (tmp->vif) {
1279                         /* On reset we need to add the same interface again */
1280                         if (tmp->vif == vif) {
1281                                 reset = true;
1282                                 ctx = tmp;
1283                                 break;
1284                         }
1285
1286                         /* check if this busy context is exclusive */
1287                         if (tmp->exclusive_interface_modes &
1288                                                 BIT(tmp->vif->type)) {
1289                                 err = -EINVAL;
1290                                 goto out;
1291                         }
1292                         continue;
1293                 }
1294
1295                 if (!(possible_modes & BIT(viftype)))
1296                         continue;
1297
1298                 /* have maybe usable context w/o interface */
1299                 ctx = tmp;
1300                 break;
1301         }
1302
1303         if (!ctx) {
1304                 err = -EOPNOTSUPP;
1305                 goto out;
1306         }
1307
1308         vif_priv->ctx = ctx;
1309         ctx->vif = vif;
1310
1311         /*
1312          * In SNIFFER device type, the firmware reports the FCS to
1313          * the host, rather than snipping it off. Unfortunately,
1314          * mac80211 doesn't (yet) provide a per-packet flag for
1315          * this, so that we have to set the hardware flag based
1316          * on the interfaces added. As the monitor interface can
1317          * only be present by itself, and will be removed before
1318          * other interfaces are added, this is safe.
1319          */
1320         if (vif->type == NL80211_IFTYPE_MONITOR)
1321                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1322         else
1323                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1324
1325         err = iwl_setup_interface(priv, ctx);
1326         if (!err || reset)
1327                 goto out;
1328
1329         ctx->vif = NULL;
1330         priv->iw_mode = NL80211_IFTYPE_STATION;
1331  out:
1332         mutex_unlock(&priv->mutex);
1333
1334         IWL_DEBUG_MAC80211(priv, "leave\n");
1335         return err;
1336 }
1337
1338 static void iwl_teardown_interface(struct iwl_priv *priv,
1339                                    struct ieee80211_vif *vif,
1340                                    bool mode_change)
1341 {
1342         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1343
1344         lockdep_assert_held(&priv->mutex);
1345
1346         if (priv->scan_vif == vif) {
1347                 iwl_scan_cancel_timeout(priv, 200);
1348                 iwl_force_scan_end(priv);
1349         }
1350
1351         if (!mode_change) {
1352                 iwl_set_mode(priv, ctx);
1353                 if (!ctx->always_active)
1354                         ctx->is_active = false;
1355         }
1356
1357         /*
1358          * When removing the IBSS interface, overwrite the
1359          * BT traffic load with the stored one from the last
1360          * notification, if any. If this is a device that
1361          * doesn't implement this, this has no effect since
1362          * both values are the same and zero.
1363          */
1364         if (vif->type == NL80211_IFTYPE_ADHOC)
1365                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1366 }
1367
1368 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1369                               struct ieee80211_vif *vif)
1370 {
1371         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1372         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1373
1374         IWL_DEBUG_MAC80211(priv, "enter\n");
1375
1376         mutex_lock(&priv->mutex);
1377
1378         if (WARN_ON(ctx->vif != vif)) {
1379                 struct iwl_rxon_context *tmp;
1380                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1381                 for_each_context(priv, tmp)
1382                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1383                                 tmp->ctxid, tmp, tmp->vif);
1384         }
1385         ctx->vif = NULL;
1386
1387         iwl_teardown_interface(priv, vif, false);
1388
1389         mutex_unlock(&priv->mutex);
1390
1391         IWL_DEBUG_MAC80211(priv, "leave\n");
1392
1393 }
1394
1395 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1396                                        struct ieee80211_vif *vif,
1397                                        enum nl80211_iftype newtype, bool newp2p)
1398 {
1399         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1400         struct iwl_rxon_context *ctx, *tmp;
1401         enum nl80211_iftype newviftype = newtype;
1402         u32 interface_modes;
1403         int err;
1404
1405         IWL_DEBUG_MAC80211(priv, "enter\n");
1406
1407         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1408
1409         mutex_lock(&priv->mutex);
1410
1411         ctx = iwl_rxon_ctx_from_vif(vif);
1412
1413         /*
1414          * To simplify this code, only support changes on the
1415          * BSS context. The PAN context is usually reassigned
1416          * by creating/removing P2P interfaces anyway.
1417          */
1418         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1419                 err = -EBUSY;
1420                 goto out;
1421         }
1422
1423         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1424                 /*
1425                  * Huh? But wait ... this can maybe happen when
1426                  * we're in the middle of a firmware restart!
1427                  */
1428                 err = -EBUSY;
1429                 goto out;
1430         }
1431
1432         /* Check if the switch is supported in the same context */
1433         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1434         if (!(interface_modes & BIT(newtype))) {
1435                 err = -EBUSY;
1436                 goto out;
1437         }
1438
1439         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1440                 for_each_context(priv, tmp) {
1441                         if (ctx == tmp)
1442                                 continue;
1443
1444                         if (!tmp->is_active)
1445                                 continue;
1446
1447                         /*
1448                          * The current mode switch would be exclusive, but
1449                          * another context is active ... refuse the switch.
1450                          */
1451                         err = -EBUSY;
1452                         goto out;
1453                 }
1454         }
1455
1456         /* success */
1457         iwl_teardown_interface(priv, vif, true);
1458         vif->type = newviftype;
1459         vif->p2p = newp2p;
1460         err = iwl_setup_interface(priv, ctx);
1461         WARN_ON(err);
1462         /*
1463          * We've switched internally, but submitting to the
1464          * device may have failed for some reason. Mask this
1465          * error, because otherwise mac80211 will not switch
1466          * (and set the interface type back) and we'll be
1467          * out of sync with it.
1468          */
1469         err = 0;
1470
1471  out:
1472         mutex_unlock(&priv->mutex);
1473         IWL_DEBUG_MAC80211(priv, "leave\n");
1474
1475         return err;
1476 }
1477
1478 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1479                               struct ieee80211_vif *vif,
1480                               struct cfg80211_scan_request *req)
1481 {
1482         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1483         int ret;
1484
1485         IWL_DEBUG_MAC80211(priv, "enter\n");
1486
1487         if (req->n_channels == 0)
1488                 return -EINVAL;
1489
1490         mutex_lock(&priv->mutex);
1491
1492         /*
1493          * If an internal scan is in progress, just set
1494          * up the scan_request as per above.
1495          */
1496         if (priv->scan_type != IWL_SCAN_NORMAL) {
1497                 IWL_DEBUG_SCAN(priv,
1498                                "SCAN request during internal scan - defer\n");
1499                 priv->scan_request = req;
1500                 priv->scan_vif = vif;
1501                 ret = 0;
1502         } else {
1503                 priv->scan_request = req;
1504                 priv->scan_vif = vif;
1505                 /*
1506                  * mac80211 will only ask for one band at a time
1507                  * so using channels[0] here is ok
1508                  */
1509                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1510                                         req->channels[0]->band);
1511                 if (ret) {
1512                         priv->scan_request = NULL;
1513                         priv->scan_vif = NULL;
1514                 }
1515         }
1516
1517         IWL_DEBUG_MAC80211(priv, "leave\n");
1518
1519         mutex_unlock(&priv->mutex);
1520
1521         return ret;
1522 }
1523
1524 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1525 {
1526         struct iwl_addsta_cmd cmd = {
1527                 .mode = STA_CONTROL_MODIFY_MSK,
1528                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1529                 .sta.sta_id = sta_id,
1530         };
1531
1532         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1533 }
1534
1535 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1536                                   struct ieee80211_vif *vif,
1537                                   enum sta_notify_cmd cmd,
1538                                   struct ieee80211_sta *sta)
1539 {
1540         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1541         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1542         int sta_id;
1543
1544         IWL_DEBUG_MAC80211(priv, "enter\n");
1545
1546         switch (cmd) {
1547         case STA_NOTIFY_SLEEP:
1548                 WARN_ON(!sta_priv->client);
1549                 sta_priv->asleep = true;
1550                 if (atomic_read(&sta_priv->pending_frames) > 0)
1551                         ieee80211_sta_block_awake(hw, sta, true);
1552                 break;
1553         case STA_NOTIFY_AWAKE:
1554                 WARN_ON(!sta_priv->client);
1555                 if (!sta_priv->asleep)
1556                         break;
1557                 sta_priv->asleep = false;
1558                 sta_id = iwl_sta_id(sta);
1559                 if (sta_id != IWL_INVALID_STATION)
1560                         iwl_sta_modify_ps_wake(priv, sta_id);
1561                 break;
1562         default:
1563                 break;
1564         }
1565         IWL_DEBUG_MAC80211(priv, "leave\n");
1566 }
1567
1568 struct ieee80211_ops iwlagn_hw_ops = {
1569         .tx = iwlagn_mac_tx,
1570         .start = iwlagn_mac_start,
1571         .stop = iwlagn_mac_stop,
1572 #ifdef CONFIG_PM_SLEEP
1573         .suspend = iwlagn_mac_suspend,
1574         .resume = iwlagn_mac_resume,
1575         .set_wakeup = iwlagn_mac_set_wakeup,
1576 #endif
1577         .add_interface = iwlagn_mac_add_interface,
1578         .remove_interface = iwlagn_mac_remove_interface,
1579         .change_interface = iwlagn_mac_change_interface,
1580         .config = iwlagn_mac_config,
1581         .configure_filter = iwlagn_configure_filter,
1582         .set_key = iwlagn_mac_set_key,
1583         .update_tkip_key = iwlagn_mac_update_tkip_key,
1584         .set_rekey_data = iwlagn_mac_set_rekey_data,
1585         .conf_tx = iwlagn_mac_conf_tx,
1586         .bss_info_changed = iwlagn_bss_info_changed,
1587         .ampdu_action = iwlagn_mac_ampdu_action,
1588         .hw_scan = iwlagn_mac_hw_scan,
1589         .sta_notify = iwlagn_mac_sta_notify,
1590         .sta_state = iwlagn_mac_sta_state,
1591         .channel_switch = iwlagn_mac_channel_switch,
1592         .flush = iwlagn_mac_flush,
1593         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1594         .rssi_callback = iwlagn_mac_rssi_callback,
1595         .set_tim = iwlagn_mac_set_tim,
1596 };
1597
1598 /* This function both allocates and initializes hw and priv. */
1599 struct ieee80211_hw *iwl_alloc_all(void)
1600 {
1601         struct iwl_priv *priv;
1602         struct iwl_op_mode *op_mode;
1603         /* mac80211 allocates memory for this device instance, including
1604          *   space for this driver's private structure */
1605         struct ieee80211_hw *hw;
1606
1607         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1608                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1609         if (!hw)
1610                 goto out;
1611
1612         op_mode = hw->priv;
1613         priv = IWL_OP_MODE_GET_DVM(op_mode);
1614         priv->hw = hw;
1615
1616 out:
1617         return hw;
1618 }