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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/ieee80211_radiotap.h>
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-io.h"
  47 #include "iwl-trans.h"
  48 #include "iwl-op-mode.h"
  49 #include "iwl-modparams.h"
  50
  51 #include "dev.h"
  52 #include "calib.h"
  53 #include "agn.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 151                     IEEE80211_HW_QUEUE_CONTROL |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_WANT_MONITOR_VIF;
 155
 156         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 157         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 158
 159         /*
 160          * Including the following line will crash some AP's.  This
 161          * workaround removes the stimulus which causes the crash until
 162          * the AP software can be fixed.
 163         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 164          */
 165
 166         if (priv->nvm_data->sku_cap_11n_enable)
 167                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 168                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 169
 170         /*
 171          * Enable 11w if advertised by firmware and software crypto
 172          * is not enabled (as the firmware will interpret some mgmt
 173          * packets, so enabling it with software crypto isn't safe)
 174          */
 175         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 176             !iwlwifi_mod_params.sw_crypto)
 177                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 178
 179         hw->sta_data_size = sizeof(struct iwl_station_priv);
 180         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 181
 182         for_each_context(priv, ctx) {
 183                 hw->wiphy->interface_modes |= ctx->interface_modes;
 184                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 185         }
 186
 187         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 188
 189         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 190                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 191                 hw->wiphy->n_iface_combinations =
 192                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 193         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 194                 hw->wiphy->iface_combinations =
 195                         iwlagn_iface_combinations_dualmode;
 196                 hw->wiphy->n_iface_combinations =
 197                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 198         }
 199
 200         hw->wiphy->max_remain_on_channel_duration = 500;
 201
 202         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 203                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 204                             WIPHY_FLAG_IBSS_RSN;
 205
 206 #ifdef CONFIG_PM_SLEEP
 207         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 208             priv->trans->ops->d3_suspend &&
 209             priv->trans->ops->d3_resume &&
 210             device_can_wakeup(priv->trans->dev)) {
 211                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 212                                              WIPHY_WOWLAN_DISCONNECT |
 213                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 214                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 215                 if (!iwlwifi_mod_params.sw_crypto)
 216                         priv->wowlan_support.flags |=
 217                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 218                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 219
 220                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 221                 priv->wowlan_support.pattern_min_len =
 222                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 223                 priv->wowlan_support.pattern_max_len =
 224                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 225                 hw->wiphy->wowlan = &priv->wowlan_support;
 226         }
 227 #endif
 228
 229         if (iwlwifi_mod_params.power_save)
 230                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 231         else
 232                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 233
 234         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 235         /* we create the 802.11 header and a max-length SSID element */
 236         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 237
 238         /*
 239          * We don't use all queues: 4 and 9 are unused and any
 240          * aggregation queue gets mapped down to the AC queue.
 241          */
 242         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 243
 244         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 245
 246         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 247                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 248                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 249         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 250                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 251                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 252
 253         hw->wiphy->hw_version = priv->trans->hw_id;
 254
 255         iwl_leds_init(priv);
 256
 257         ret = ieee80211_register_hw(priv->hw);
 258         if (ret) {
 259                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 260                 iwl_leds_exit(priv);
 261                 return ret;
 262         }
 263         priv->mac80211_registered = 1;
 264
 265         return 0;
 266 }
 267
 268 void iwlagn_mac_unregister(struct iwl_priv *priv)
 269 {
 270         if (!priv->mac80211_registered)
 271                 return;
 272         iwl_leds_exit(priv);
 273         ieee80211_unregister_hw(priv->hw);
 274         priv->mac80211_registered = 0;
 275 }
 276
 277 static int __iwl_up(struct iwl_priv *priv)
 278 {
 279         struct iwl_rxon_context *ctx;
 280         int ret;
 281
 282         lockdep_assert_held(&priv->mutex);
 283
 284         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 285                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 286                 return -EIO;
 287         }
 288
 289         for_each_context(priv, ctx) {
 290                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 291                 if (ret) {
 292                         iwl_dealloc_bcast_stations(priv);
 293                         return ret;
 294                 }
 295         }
 296
 297         ret = iwl_run_init_ucode(priv);
 298         if (ret) {
 299                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 300                 goto error;
 301         }
 302
 303         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 304         if (ret) {
 305                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 306                 goto error;
 307         }
 308
 309         ret = iwl_alive_start(priv);
 310         if (ret)
 311                 goto error;
 312         return 0;
 313
 314  error:
 315         set_bit(STATUS_EXIT_PENDING, &priv->status);
 316         iwl_down(priv);
 317         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 318
 319         IWL_ERR(priv, "Unable to initialize device.\n");
 320         return ret;
 321 }
 322
 323 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 324 {
 325         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 326         int ret;
 327
 328         IWL_DEBUG_MAC80211(priv, "enter\n");
 329
 330         /* we should be verifying the device is ready to be opened */
 331         mutex_lock(&priv->mutex);
 332         ret = __iwl_up(priv);
 333         mutex_unlock(&priv->mutex);
 334         if (ret)
 335                 return ret;
 336
 337         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 338
 339         /* Now we should be done, and the READY bit should be set. */
 340         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 341                 ret = -EIO;
 342
 343         iwlagn_led_enable(priv);
 344
 345         priv->is_open = 1;
 346         IWL_DEBUG_MAC80211(priv, "leave\n");
 347         return 0;
 348 }
 349
 350 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 351 {
 352         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 353
 354         IWL_DEBUG_MAC80211(priv, "enter\n");
 355
 356         if (!priv->is_open)
 357                 return;
 358
 359         priv->is_open = 0;
 360
 361         mutex_lock(&priv->mutex);
 362         iwl_down(priv);
 363         mutex_unlock(&priv->mutex);
 364
 365         iwl_cancel_deferred_work(priv);
 366
 367         flush_workqueue(priv->workqueue);
 368
 369         /* User space software may expect getting rfkill changes
 370          * even if interface is down, trans->down will leave the RF
 371          * kill interrupt enabled
 372          */
 373         iwl_trans_stop_hw(priv->trans, false);
 374
 375         IWL_DEBUG_MAC80211(priv, "leave\n");
 376 }
 377
 378 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 379                                       struct ieee80211_vif *vif,
 380                                       struct cfg80211_gtk_rekey_data *data)
 381 {
 382         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 383
 384         if (iwlwifi_mod_params.sw_crypto)
 385                 return;
 386
 387         IWL_DEBUG_MAC80211(priv, "enter\n");
 388         mutex_lock(&priv->mutex);
 389
 390         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 391                 goto out;
 392
 393         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 394         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 395         priv->replay_ctr =
 396                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 397         priv->have_rekey_data = true;
 398
 399  out:
 400         mutex_unlock(&priv->mutex);
 401         IWL_DEBUG_MAC80211(priv, "leave\n");
 402 }
 403
 404 #ifdef CONFIG_PM_SLEEP
 405
 406 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 407                               struct cfg80211_wowlan *wowlan)
 408 {
 409         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 410         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 411         int ret;
 412
 413         if (WARN_ON(!wowlan))
 414                 return -EINVAL;
 415
 416         IWL_DEBUG_MAC80211(priv, "enter\n");
 417         mutex_lock(&priv->mutex);
 418
 419         /* Don't attempt WoWLAN when not associated, tear down instead. */
 420         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 421             !iwl_is_associated_ctx(ctx)) {
 422                 ret = 1;
 423                 goto out;
 424         }
 425
 426         ret = iwlagn_suspend(priv, wowlan);
 427         if (ret)
 428                 goto error;
 429
 430         /* let the ucode operate on its own */
 431         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 432                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 433
 434         iwl_trans_d3_suspend(priv->trans, false);
 435
 436         goto out;
 437
 438  error:
 439         priv->wowlan = false;
 440         iwlagn_prepare_restart(priv);
 441         ieee80211_restart_hw(priv->hw);
 442  out:
 443         mutex_unlock(&priv->mutex);
 444         IWL_DEBUG_MAC80211(priv, "leave\n");
 445
 446         return ret;
 447 }
 448
 449 struct iwl_resume_data {
 450         struct iwl_priv *priv;
 451         struct iwlagn_wowlan_status *cmd;
 452         bool valid;
 453 };
 454
 455 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 456                                  struct iwl_rx_packet *pkt, void *data)
 457 {
 458         struct iwl_resume_data *resume_data = data;
 459         struct iwl_priv *priv = resume_data->priv;
 460         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 461
 462         if (len - 4 != sizeof(*resume_data->cmd)) {
 463                 IWL_ERR(priv, "rx wrong size data\n");
 464                 return true;
 465         }
 466         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 467         resume_data->valid = true;
 468
 469         return true;
 470 }
 471
 472 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 473 {
 474         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 475         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 476         struct ieee80211_vif *vif;
 477         u32 base;
 478         int ret;
 479         enum iwl_d3_status d3_status;
 480         struct error_table_start {
 481                 /* cf. struct iwl_error_event_table */
 482                 u32 valid;
 483                 u32 error_id;
 484         } err_info;
 485         struct iwl_notification_wait status_wait;
 486         static const u8 status_cmd[] = {
 487                 REPLY_WOWLAN_GET_STATUS,
 488         };
 489         struct iwlagn_wowlan_status status_data = {};
 490         struct iwl_resume_data resume_data = {
 491                 .priv = priv,
 492                 .cmd = &status_data,
 493                 .valid = false,
 494         };
 495         struct cfg80211_wowlan_wakeup wakeup = {
 496                 .pattern_idx = -1,
 497         };
 498 #ifdef CONFIG_IWLWIFI_DEBUGFS
 499         const struct fw_img *img;
 500 #endif
 501
 502         IWL_DEBUG_MAC80211(priv, "enter\n");
 503         mutex_lock(&priv->mutex);
 504
 505         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 506         vif = ctx->vif;
 507
 508         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
 509         if (ret)
 510                 goto out_unlock;
 511
 512         if (d3_status != IWL_D3_STATUS_ALIVE) {
 513                 IWL_INFO(priv, "Device was reset during suspend\n");
 514                 goto out_unlock;
 515         }
 516
 517         /* uCode is no longer operating by itself */
 518         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 519                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 520
 521         base = priv->device_pointers.error_event_table;
 522         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 523                 IWL_WARN(priv, "Invalid error table during resume!\n");
 524                 goto out_unlock;
 525         }
 526
 527         iwl_trans_read_mem_bytes(priv->trans, base,
 528                                  &err_info, sizeof(err_info));
 529
 530         if (err_info.valid) {
 531                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 532                          err_info.valid, err_info.error_id);
 533                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 534                         wakeup.rfkill_release = true;
 535                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 536                                                        GFP_KERNEL);
 537                 }
 538                 goto out_unlock;
 539         }
 540
 541 #ifdef CONFIG_IWLWIFI_DEBUGFS
 542         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 543         if (!priv->wowlan_sram)
 544                 priv->wowlan_sram =
 545                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 546                                 GFP_KERNEL);
 547
 548         if (priv->wowlan_sram)
 549                 iwl_trans_read_mem(priv->trans, 0x800000,
 550                                    priv->wowlan_sram,
 551                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 552 #endif
 553
 554         /*
 555          * This is very strange. The GET_STATUS command is sent but the device
 556          * doesn't reply properly, it seems it doesn't close the RBD so one is
 557          * always left open ... As a result, we need to send another command
 558          * and have to reset the driver afterwards. As we need to switch to
 559          * runtime firmware again that'll happen.
 560          */
 561
 562         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 563                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 564                                    &resume_data);
 565
 566         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 567         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 568         /* an RBD is left open in the firmware now! */
 569
 570         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 571         if (ret)
 572                 goto out_unlock;
 573
 574         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 575                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 576                 struct cfg80211_wowlan_wakeup *wakeup_report;
 577
 578                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 579
 580                 if (reasons) {
 581                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 582                                 wakeup.magic_pkt = true;
 583                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 584                                 wakeup.pattern_idx = status_data.pattern_number;
 585                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 586                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 587                                 wakeup.disconnect = true;
 588                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 589                                 wakeup.gtk_rekey_failure = true;
 590                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 591                                 wakeup.eap_identity_req = true;
 592                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 593                                 wakeup.four_way_handshake = true;
 594                         wakeup_report = &wakeup;
 595                 } else {
 596                         wakeup_report = NULL;
 597                 }
 598
 599                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 600         }
 601
 602         priv->wowlan = false;
 603
 604         iwlagn_prepare_restart(priv);
 605
 606         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 607         iwl_connection_init_rx_config(priv, ctx);
 608         iwlagn_set_rxon_chain(priv, ctx);
 609
 610  out_unlock:
 611         mutex_unlock(&priv->mutex);
 612         IWL_DEBUG_MAC80211(priv, "leave\n");
 613
 614         ieee80211_resume_disconnect(vif);
 615
 616         return 1;
 617 }
 618
 619 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 620 {
 621         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 622
 623         device_set_wakeup_enable(priv->trans->dev, enabled);
 624 }
 625 #endif
 626
 627 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 628                           struct ieee80211_tx_control *control,
 629                           struct sk_buff *skb)
 630 {
 631         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 632
 633         if (iwlagn_tx_skb(priv, control->sta, skb))
 634                 ieee80211_free_txskb(hw, skb);
 635 }
 636
 637 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 638                                        struct ieee80211_vif *vif,
 639                                        struct ieee80211_key_conf *keyconf,
 640                                        struct ieee80211_sta *sta,
 641                                        u32 iv32, u16 *phase1key)
 642 {
 643         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 644
 645         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 646 }
 647
 648 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 649                               struct ieee80211_vif *vif,
 650                               struct ieee80211_sta *sta,
 651                               struct ieee80211_key_conf *key)
 652 {
 653         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 654         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 655         struct iwl_rxon_context *ctx = vif_priv->ctx;
 656         int ret;
 657         bool is_default_wep_key = false;
 658
 659         IWL_DEBUG_MAC80211(priv, "enter\n");
 660
 661         if (iwlwifi_mod_params.sw_crypto) {
 662                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 663                 return -EOPNOTSUPP;
 664         }
 665
 666         switch (key->cipher) {
 667         case WLAN_CIPHER_SUITE_TKIP:
 668                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 669                 /* fall through */
 670         case WLAN_CIPHER_SUITE_CCMP:
 671                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 672                 break;
 673         default:
 674                 break;
 675         }
 676
 677         /*
 678          * We could program these keys into the hardware as well, but we
 679          * don't expect much multicast traffic in IBSS and having keys
 680          * for more stations is probably more useful.
 681          *
 682          * Mark key TX-only and return 0.
 683          */
 684         if (vif->type == NL80211_IFTYPE_ADHOC &&
 685             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 686                 key->hw_key_idx = WEP_INVALID_OFFSET;
 687                 return 0;
 688         }
 689
 690         /* If they key was TX-only, accept deletion */
 691         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 692                 return 0;
 693
 694         mutex_lock(&priv->mutex);
 695         iwl_scan_cancel_timeout(priv, 100);
 696
 697         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 698
 699         /*
 700          * If we are getting WEP group key and we didn't receive any key mapping
 701          * so far, we are in legacy wep mode (group key only), otherwise we are
 702          * in 1X mode.
 703          * In legacy wep mode, we use another host command to the uCode.
 704          */
 705         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 706              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 707                 if (cmd == SET_KEY)
 708                         is_default_wep_key = !ctx->key_mapping_keys;
 709                 else
 710                         is_default_wep_key =
 711                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 712         }
 713
 714
 715         switch (cmd) {
 716         case SET_KEY:
 717                 if (is_default_wep_key) {
 718                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 719                         break;
 720                 }
 721                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 722                 if (ret) {
 723                         /*
 724                          * can't add key for RX, but we don't need it
 725                          * in the device for TX so still return 0
 726                          */
 727                         ret = 0;
 728                         key->hw_key_idx = WEP_INVALID_OFFSET;
 729                 }
 730
 731                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 732                 break;
 733         case DISABLE_KEY:
 734                 if (is_default_wep_key)
 735                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 736                 else
 737                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 738
 739                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 740                 break;
 741         default:
 742                 ret = -EINVAL;
 743         }
 744
 745         mutex_unlock(&priv->mutex);
 746         IWL_DEBUG_MAC80211(priv, "leave\n");
 747
 748         return ret;
 749 }
 750
 751 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 752                                    struct ieee80211_vif *vif,
 753                                    enum ieee80211_ampdu_mlme_action action,
 754                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 755                                    u8 buf_size)
 756 {
 757         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 758         int ret = -EINVAL;
 759         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 760
 761         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 762                      sta->addr, tid);
 763
 764         if (!(priv->nvm_data->sku_cap_11n_enable))
 765                 return -EACCES;
 766
 767         IWL_DEBUG_MAC80211(priv, "enter\n");
 768         mutex_lock(&priv->mutex);
 769
 770         switch (action) {
 771         case IEEE80211_AMPDU_RX_START:
 772                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 773                         break;
 774                 IWL_DEBUG_HT(priv, "start Rx\n");
 775                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 776                 break;
 777         case IEEE80211_AMPDU_RX_STOP:
 778                 IWL_DEBUG_HT(priv, "stop Rx\n");
 779                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 780                 break;
 781         case IEEE80211_AMPDU_TX_START:
 782                 if (!priv->trans->ops->txq_enable)
 783                         break;
 784                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 785                         break;
 786                 IWL_DEBUG_HT(priv, "start Tx\n");
 787                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 788                 break;
 789         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 790         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 791                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 792                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 793                 break;
 794         case IEEE80211_AMPDU_TX_STOP_CONT:
 795                 IWL_DEBUG_HT(priv, "stop Tx\n");
 796                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 797                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 798                         priv->agg_tids_count--;
 799                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 800                                      priv->agg_tids_count);
 801                 }
 802                 if (!priv->agg_tids_count &&
 803                     priv->hw_params.use_rts_for_aggregation) {
 804                         /*
 805                          * switch off RTS/CTS if it was previously enabled
 806                          */
 807                         sta_priv->lq_sta.lq.general_params.flags &=
 808                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 809                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 810                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 811                 }
 812                 break;
 813         case IEEE80211_AMPDU_TX_OPERATIONAL:
 814                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 815                 break;
 816         }
 817         mutex_unlock(&priv->mutex);
 818         IWL_DEBUG_MAC80211(priv, "leave\n");
 819         return ret;
 820 }
 821
 822 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 823                               struct ieee80211_vif *vif,
 824                               struct ieee80211_sta *sta)
 825 {
 826         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 827         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 828         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 829         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 830         int ret;
 831         u8 sta_id;
 832
 833         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 834                         sta->addr);
 835         sta_priv->sta_id = IWL_INVALID_STATION;
 836
 837         atomic_set(&sta_priv->pending_frames, 0);
 838         if (vif->type == NL80211_IFTYPE_AP)
 839                 sta_priv->client = true;
 840
 841         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 842                                      is_ap, sta, &sta_id);
 843         if (ret) {
 844                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 845                         sta->addr, ret);
 846                 /* Should we return success if return code is EEXIST ? */
 847                 return ret;
 848         }
 849
 850         sta_priv->sta_id = sta_id;
 851
 852         return 0;
 853 }
 854
 855 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 856                                  struct ieee80211_vif *vif,
 857                                  struct ieee80211_sta *sta)
 858 {
 859         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 860         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 861         int ret;
 862
 863         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 864
 865         if (vif->type == NL80211_IFTYPE_STATION) {
 866                 /*
 867                  * Station will be removed from device when the RXON
 868                  * is set to unassociated -- just deactivate it here
 869                  * to avoid re-programming it.
 870                  */
 871                 ret = 0;
 872                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 873         } else {
 874                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 875                 if (ret)
 876                         IWL_DEBUG_QUIET_RFKILL(priv,
 877                                 "Error removing station %pM\n", sta->addr);
 878         }
 879         return ret;
 880 }
 881
 882 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 883                                 struct ieee80211_vif *vif,
 884                                 struct ieee80211_sta *sta,
 885                                 enum ieee80211_sta_state old_state,
 886                                 enum ieee80211_sta_state new_state)
 887 {
 888         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 889         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 890         enum {
 891                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 892         } op = NONE;
 893         int ret;
 894
 895         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 896                            sta->addr, old_state, new_state);
 897
 898         mutex_lock(&priv->mutex);
 899         if (vif->type == NL80211_IFTYPE_STATION) {
 900                 if (old_state == IEEE80211_STA_NOTEXIST &&
 901                     new_state == IEEE80211_STA_NONE)
 902                         op = ADD;
 903                 else if (old_state == IEEE80211_STA_NONE &&
 904                          new_state == IEEE80211_STA_NOTEXIST)
 905                         op = REMOVE;
 906                 else if (old_state == IEEE80211_STA_AUTH &&
 907                          new_state == IEEE80211_STA_ASSOC)
 908                         op = HT_RATE_INIT;
 909         } else {
 910                 if (old_state == IEEE80211_STA_AUTH &&
 911                     new_state == IEEE80211_STA_ASSOC)
 912                         op = ADD_RATE_INIT;
 913                 else if (old_state == IEEE80211_STA_ASSOC &&
 914                          new_state == IEEE80211_STA_AUTH)
 915                         op = REMOVE;
 916         }
 917
 918         switch (op) {
 919         case ADD:
 920                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 921                 if (ret)
 922                         break;
 923                 /*
 924                  * Clear the in-progress flag, the AP station entry was added
 925                  * but we'll initialize LQ only when we've associated (which
 926                  * would also clear the in-progress flag). This is necessary
 927                  * in case we never initialize LQ because association fails.
 928                  */
 929                 spin_lock_bh(&priv->sta_lock);
 930                 priv->stations[iwl_sta_id(sta)].used &=
 931                         ~IWL_STA_UCODE_INPROGRESS;
 932                 spin_unlock_bh(&priv->sta_lock);
 933                 break;
 934         case REMOVE:
 935                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 936                 break;
 937         case ADD_RATE_INIT:
 938                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 939                 if (ret)
 940                         break;
 941                 /* Initialize rate scaling */
 942                 IWL_DEBUG_INFO(priv,
 943                                "Initializing rate scaling for station %pM\n",
 944                                sta->addr);
 945                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 946                 ret = 0;
 947                 break;
 948         case HT_RATE_INIT:
 949                 /* Initialize rate scaling */
 950                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 951                 if (ret)
 952                         break;
 953                 IWL_DEBUG_INFO(priv,
 954                                "Initializing rate scaling for station %pM\n",
 955                                sta->addr);
 956                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 957                 ret = 0;
 958                 break;
 959         default:
 960                 ret = 0;
 961                 break;
 962         }
 963
 964         /*
 965          * mac80211 might WARN if we fail, but due the way we
 966          * (badly) handle hard rfkill, we might fail here
 967          */
 968         if (iwl_is_rfkill(priv))
 969                 ret = 0;
 970
 971         mutex_unlock(&priv->mutex);
 972         IWL_DEBUG_MAC80211(priv, "leave\n");
 973
 974         return ret;
 975 }
 976
 977 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 978                                       struct ieee80211_channel_switch *ch_switch)
 979 {
 980         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 981         struct ieee80211_conf *conf = &hw->conf;
 982         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 983         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 984         /*
 985          * MULTI-FIXME
 986          * When we add support for multiple interfaces, we need to
 987          * revisit this. The channel switch command in the device
 988          * only affects the BSS context, but what does that really
 989          * mean? And what if we get a CSA on the second interface?
 990          * This needs a lot of work.
 991          */
 992         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 993         u16 ch;
 994
 995         IWL_DEBUG_MAC80211(priv, "enter\n");
 996
 997         mutex_lock(&priv->mutex);
 998
 999         if (iwl_is_rfkill(priv))
1000                 goto out;
1001
1002         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1003             test_bit(STATUS_SCANNING, &priv->status) ||
1004             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1005                 goto out;
1006
1007         if (!iwl_is_associated_ctx(ctx))
1008                 goto out;
1009
1010         if (!priv->lib->set_channel_switch)
1011                 goto out;
1012
1013         ch = channel->hw_value;
1014         if (le16_to_cpu(ctx->active.channel) == ch)
1015                 goto out;
1016
1017         priv->current_ht_config.smps = conf->smps_mode;
1018
1019         /* Configure HT40 channels */
1020         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1021         case NL80211_CHAN_NO_HT:
1022         case NL80211_CHAN_HT20:
1023                 ctx->ht.is_40mhz = false;
1024                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1025                 break;
1026         case NL80211_CHAN_HT40MINUS:
1027                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1028                 ctx->ht.is_40mhz = true;
1029                 break;
1030         case NL80211_CHAN_HT40PLUS:
1031                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1032                 ctx->ht.is_40mhz = true;
1033                 break;
1034         }
1035
1036         if ((le16_to_cpu(ctx->staging.channel) != ch))
1037                 ctx->staging.flags = 0;
1038
1039         iwl_set_rxon_channel(priv, channel, ctx);
1040         iwl_set_rxon_ht(priv, ht_conf);
1041         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1042
1043         /*
1044          * at this point, staging_rxon has the
1045          * configuration for channel switch
1046          */
1047         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1048         priv->switch_channel = cpu_to_le16(ch);
1049         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1050                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1051                 priv->switch_channel = 0;
1052                 ieee80211_chswitch_done(ctx->vif, false);
1053         }
1054
1055 out:
1056         mutex_unlock(&priv->mutex);
1057         IWL_DEBUG_MAC80211(priv, "leave\n");
1058 }
1059
1060 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1061 {
1062         /*
1063          * MULTI-FIXME
1064          * See iwlagn_mac_channel_switch.
1065          */
1066         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1067
1068         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1069                 return;
1070
1071         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1072                 return;
1073
1074         if (ctx->vif)
1075                 ieee80211_chswitch_done(ctx->vif, is_success);
1076 }
1077
1078 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1079                                     unsigned int changed_flags,
1080                                     unsigned int *total_flags,
1081                                     u64 multicast)
1082 {
1083         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1084         __le32 filter_or = 0, filter_nand = 0;
1085         struct iwl_rxon_context *ctx;
1086
1087 #define CHK(test, flag) do { \
1088         if (*total_flags & (test))              \
1089                 filter_or |= (flag);            \
1090         else                                    \
1091                 filter_nand |= (flag);          \
1092         } while (0)
1093
1094         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1095                         changed_flags, *total_flags);
1096
1097         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1098         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1099         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1100         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1101
1102 #undef CHK
1103
1104         mutex_lock(&priv->mutex);
1105
1106         for_each_context(priv, ctx) {
1107                 ctx->staging.filter_flags &= ~filter_nand;
1108                 ctx->staging.filter_flags |= filter_or;
1109
1110                 /*
1111                  * Not committing directly because hardware can perform a scan,
1112                  * but we'll eventually commit the filter flags change anyway.
1113                  */
1114         }
1115
1116         mutex_unlock(&priv->mutex);
1117
1118         /*
1119          * Receiving all multicast frames is always enabled by the
1120          * default flags setup in iwl_connection_init_rx_config()
1121          * since we currently do not support programming multicast
1122          * filters into the device.
1123          */
1124         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1125                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1126 }
1127
1128 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1129 {
1130         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1131
1132         mutex_lock(&priv->mutex);
1133         IWL_DEBUG_MAC80211(priv, "enter\n");
1134
1135         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1136                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1137                 goto done;
1138         }
1139         if (iwl_is_rfkill(priv)) {
1140                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1141                 goto done;
1142         }
1143
1144         /*
1145          * mac80211 will not push any more frames for transmit
1146          * until the flush is completed
1147          */
1148         if (drop) {
1149                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1150                 if (iwlagn_txfifo_flush(priv, 0)) {
1151                         IWL_ERR(priv, "flush request fail\n");
1152                         goto done;
1153                 }
1154         }
1155         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1156         iwl_trans_wait_tx_queue_empty(priv->trans);
1157 done:
1158         mutex_unlock(&priv->mutex);
1159         IWL_DEBUG_MAC80211(priv, "leave\n");
1160 }
1161
1162 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1163                                      struct ieee80211_vif *vif,
1164                                      struct ieee80211_channel *channel,
1165                                      int duration,
1166                                      enum ieee80211_roc_type type)
1167 {
1168         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1169         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1170         int err = 0;
1171
1172         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1173                 return -EOPNOTSUPP;
1174
1175         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1176                 return -EOPNOTSUPP;
1177
1178         IWL_DEBUG_MAC80211(priv, "enter\n");
1179         mutex_lock(&priv->mutex);
1180
1181         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1182                 /* mac80211 should not scan while ROC or ROC while scanning */
1183                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1184                         err = -EBUSY;
1185                         goto out;
1186                 }
1187
1188                 iwl_scan_cancel_timeout(priv, 100);
1189
1190                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1191                         err = -EBUSY;
1192                         goto out;
1193                 }
1194         }
1195
1196         priv->hw_roc_channel = channel;
1197         /* convert from ms to TU */
1198         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1199         priv->hw_roc_start_notified = false;
1200         cancel_delayed_work(&priv->hw_roc_disable_work);
1201
1202         if (!ctx->is_active) {
1203                 static const struct iwl_qos_info default_qos_data = {
1204                         .def_qos_parm = {
1205                                 .ac[0] = {
1206                                         .cw_min = cpu_to_le16(3),
1207                                         .cw_max = cpu_to_le16(7),
1208                                         .aifsn = 2,
1209                                         .edca_txop = cpu_to_le16(1504),
1210                                 },
1211                                 .ac[1] = {
1212                                         .cw_min = cpu_to_le16(7),
1213                                         .cw_max = cpu_to_le16(15),
1214                                         .aifsn = 2,
1215                                         .edca_txop = cpu_to_le16(3008),
1216                                 },
1217                                 .ac[2] = {
1218                                         .cw_min = cpu_to_le16(15),
1219                                         .cw_max = cpu_to_le16(1023),
1220                                         .aifsn = 3,
1221                                 },
1222                                 .ac[3] = {
1223                                         .cw_min = cpu_to_le16(15),
1224                                         .cw_max = cpu_to_le16(1023),
1225                                         .aifsn = 7,
1226                                 },
1227                         },
1228                 };
1229
1230                 ctx->is_active = true;
1231                 ctx->qos_data = default_qos_data;
1232                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1233                 memcpy(ctx->staging.node_addr,
1234                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1235                        ETH_ALEN);
1236                 memcpy(ctx->staging.bssid_addr,
1237                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1238                        ETH_ALEN);
1239                 err = iwlagn_commit_rxon(priv, ctx);
1240                 if (err)
1241                         goto out;
1242                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1243                                              RXON_FILTER_PROMISC_MSK |
1244                                              RXON_FILTER_CTL2HOST_MSK;
1245
1246                 err = iwlagn_commit_rxon(priv, ctx);
1247                 if (err) {
1248                         iwlagn_disable_roc(priv);
1249                         goto out;
1250                 }
1251                 priv->hw_roc_setup = true;
1252         }
1253
1254         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1255         if (err)
1256                 iwlagn_disable_roc(priv);
1257
1258  out:
1259         mutex_unlock(&priv->mutex);
1260         IWL_DEBUG_MAC80211(priv, "leave\n");
1261
1262         return err;
1263 }
1264
1265 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1266 {
1267         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1268
1269         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1270                 return -EOPNOTSUPP;
1271
1272         IWL_DEBUG_MAC80211(priv, "enter\n");
1273         mutex_lock(&priv->mutex);
1274         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1275         iwlagn_disable_roc(priv);
1276         mutex_unlock(&priv->mutex);
1277         IWL_DEBUG_MAC80211(priv, "leave\n");
1278
1279         return 0;
1280 }
1281
1282 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1283                                      struct ieee80211_vif *vif,
1284                                      enum ieee80211_rssi_event rssi_event)
1285 {
1286         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1287
1288         IWL_DEBUG_MAC80211(priv, "enter\n");
1289         mutex_lock(&priv->mutex);
1290
1291         if (priv->lib->bt_params &&
1292             priv->lib->bt_params->advanced_bt_coexist) {
1293                 if (rssi_event == RSSI_EVENT_LOW)
1294                         priv->bt_enable_pspoll = true;
1295                 else if (rssi_event == RSSI_EVENT_HIGH)
1296                         priv->bt_enable_pspoll = false;
1297
1298                 iwlagn_send_advance_bt_config(priv);
1299         } else {
1300                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1301                                 "ignoring RSSI callback\n");
1302         }
1303
1304         mutex_unlock(&priv->mutex);
1305         IWL_DEBUG_MAC80211(priv, "leave\n");
1306 }
1307
1308 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1309                               struct ieee80211_sta *sta, bool set)
1310 {
1311         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1312
1313         queue_work(priv->workqueue, &priv->beacon_update);
1314
1315         return 0;
1316 }
1317
1318 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1319                               struct ieee80211_vif *vif, u16 queue,
1320                               const struct ieee80211_tx_queue_params *params)
1321 {
1322         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1323         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1324         struct iwl_rxon_context *ctx = vif_priv->ctx;
1325         int q;
1326
1327         if (WARN_ON(!ctx))
1328                 return -EINVAL;
1329
1330         IWL_DEBUG_MAC80211(priv, "enter\n");
1331
1332         if (!iwl_is_ready_rf(priv)) {
1333                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1334                 return -EIO;
1335         }
1336
1337         if (queue >= AC_NUM) {
1338                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1339                 return 0;
1340         }
1341
1342         q = AC_NUM - 1 - queue;
1343
1344         mutex_lock(&priv->mutex);
1345
1346         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1347                 cpu_to_le16(params->cw_min);
1348         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1349                 cpu_to_le16(params->cw_max);
1350         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1351         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1352                         cpu_to_le16((params->txop * 32));
1353
1354         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1355
1356         mutex_unlock(&priv->mutex);
1357
1358         IWL_DEBUG_MAC80211(priv, "leave\n");
1359         return 0;
1360 }
1361
1362 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1363 {
1364         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1365
1366         return priv->ibss_manager == IWL_IBSS_MANAGER;
1367 }
1368
1369 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1370 {
1371         iwl_connection_init_rx_config(priv, ctx);
1372
1373         iwlagn_set_rxon_chain(priv, ctx);
1374
1375         return iwlagn_commit_rxon(priv, ctx);
1376 }
1377
1378 static int iwl_setup_interface(struct iwl_priv *priv,
1379                                struct iwl_rxon_context *ctx)
1380 {
1381         struct ieee80211_vif *vif = ctx->vif;
1382         int err, ac;
1383
1384         lockdep_assert_held(&priv->mutex);
1385
1386         /*
1387          * This variable will be correct only when there's just
1388          * a single context, but all code using it is for hardware
1389          * that supports only one context.
1390          */
1391         priv->iw_mode = vif->type;
1392
1393         ctx->is_active = true;
1394
1395         err = iwl_set_mode(priv, ctx);
1396         if (err) {
1397                 if (!ctx->always_active)
1398                         ctx->is_active = false;
1399                 return err;
1400         }
1401
1402         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1403             vif->type == NL80211_IFTYPE_ADHOC) {
1404                 /*
1405                  * pretend to have high BT traffic as long as we
1406                  * are operating in IBSS mode, as this will cause
1407                  * the rate scaling etc. to behave as intended.
1408                  */
1409                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1410         }
1411
1412         /* set up queue mappings */
1413         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1414                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1415
1416         if (vif->type == NL80211_IFTYPE_AP)
1417                 vif->cab_queue = ctx->mcast_queue;
1418         else
1419                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1420
1421         return 0;
1422 }
1423
1424 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1425                                     struct ieee80211_vif *vif)
1426 {
1427         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1428         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1429         struct iwl_rxon_context *tmp, *ctx = NULL;
1430         int err;
1431         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1432         bool reset = false;
1433
1434         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1435                            viftype, vif->addr);
1436
1437         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1438
1439         mutex_lock(&priv->mutex);
1440
1441         iwlagn_disable_roc(priv);
1442
1443         if (!iwl_is_ready_rf(priv)) {
1444                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1445                 err = -EINVAL;
1446                 goto out;
1447         }
1448
1449         for_each_context(priv, tmp) {
1450                 u32 possible_modes =
1451                         tmp->interface_modes | tmp->exclusive_interface_modes;
1452
1453                 if (tmp->vif) {
1454                         /* On reset we need to add the same interface again */
1455                         if (tmp->vif == vif) {
1456                                 reset = true;
1457                                 ctx = tmp;
1458                                 break;
1459                         }
1460
1461                         /* check if this busy context is exclusive */
1462                         if (tmp->exclusive_interface_modes &
1463                                                 BIT(tmp->vif->type)) {
1464                                 err = -EINVAL;
1465                                 goto out;
1466                         }
1467                         continue;
1468                 }
1469
1470                 if (!(possible_modes & BIT(viftype)))
1471                         continue;
1472
1473                 /* have maybe usable context w/o interface */
1474                 ctx = tmp;
1475                 break;
1476         }
1477
1478         if (!ctx) {
1479                 err = -EOPNOTSUPP;
1480                 goto out;
1481         }
1482
1483         vif_priv->ctx = ctx;
1484         ctx->vif = vif;
1485
1486         /*
1487          * In SNIFFER device type, the firmware reports the FCS to
1488          * the host, rather than snipping it off. Unfortunately,
1489          * mac80211 doesn't (yet) provide a per-packet flag for
1490          * this, so that we have to set the hardware flag based
1491          * on the interfaces added. As the monitor interface can
1492          * only be present by itself, and will be removed before
1493          * other interfaces are added, this is safe.
1494          */
1495         if (vif->type == NL80211_IFTYPE_MONITOR)
1496                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1497         else
1498                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1499
1500         err = iwl_setup_interface(priv, ctx);
1501         if (!err || reset)
1502                 goto out;
1503
1504         ctx->vif = NULL;
1505         priv->iw_mode = NL80211_IFTYPE_STATION;
1506  out:
1507         mutex_unlock(&priv->mutex);
1508
1509         IWL_DEBUG_MAC80211(priv, "leave\n");
1510         return err;
1511 }
1512
1513 static void iwl_teardown_interface(struct iwl_priv *priv,
1514                                    struct ieee80211_vif *vif,
1515                                    bool mode_change)
1516 {
1517         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1518
1519         lockdep_assert_held(&priv->mutex);
1520
1521         if (priv->scan_vif == vif) {
1522                 iwl_scan_cancel_timeout(priv, 200);
1523                 iwl_force_scan_end(priv);
1524         }
1525
1526         if (!mode_change) {
1527                 iwl_set_mode(priv, ctx);
1528                 if (!ctx->always_active)
1529                         ctx->is_active = false;
1530         }
1531
1532         /*
1533          * When removing the IBSS interface, overwrite the
1534          * BT traffic load with the stored one from the last
1535          * notification, if any. If this is a device that
1536          * doesn't implement this, this has no effect since
1537          * both values are the same and zero.
1538          */
1539         if (vif->type == NL80211_IFTYPE_ADHOC)
1540                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1541 }
1542
1543 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1544                               struct ieee80211_vif *vif)
1545 {
1546         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1547         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1548
1549         IWL_DEBUG_MAC80211(priv, "enter\n");
1550
1551         mutex_lock(&priv->mutex);
1552
1553         if (WARN_ON(ctx->vif != vif)) {
1554                 struct iwl_rxon_context *tmp;
1555                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1556                 for_each_context(priv, tmp)
1557                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1558                                 tmp->ctxid, tmp, tmp->vif);
1559         }
1560         ctx->vif = NULL;
1561
1562         iwl_teardown_interface(priv, vif, false);
1563
1564         mutex_unlock(&priv->mutex);
1565
1566         IWL_DEBUG_MAC80211(priv, "leave\n");
1567
1568 }
1569
1570 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1571                                        struct ieee80211_vif *vif,
1572                                        enum nl80211_iftype newtype, bool newp2p)
1573 {
1574         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1575         struct iwl_rxon_context *ctx, *tmp;
1576         enum nl80211_iftype newviftype = newtype;
1577         u32 interface_modes;
1578         int err;
1579
1580         IWL_DEBUG_MAC80211(priv, "enter\n");
1581
1582         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1583
1584         mutex_lock(&priv->mutex);
1585
1586         ctx = iwl_rxon_ctx_from_vif(vif);
1587
1588         /*
1589          * To simplify this code, only support changes on the
1590          * BSS context. The PAN context is usually reassigned
1591          * by creating/removing P2P interfaces anyway.
1592          */
1593         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1594                 err = -EBUSY;
1595                 goto out;
1596         }
1597
1598         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1599                 /*
1600                  * Huh? But wait ... this can maybe happen when
1601                  * we're in the middle of a firmware restart!
1602                  */
1603                 err = -EBUSY;
1604                 goto out;
1605         }
1606
1607         /* Check if the switch is supported in the same context */
1608         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1609         if (!(interface_modes & BIT(newtype))) {
1610                 err = -EBUSY;
1611                 goto out;
1612         }
1613
1614         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1615                 for_each_context(priv, tmp) {
1616                         if (ctx == tmp)
1617                                 continue;
1618
1619                         if (!tmp->is_active)
1620                                 continue;
1621
1622                         /*
1623                          * The current mode switch would be exclusive, but
1624                          * another context is active ... refuse the switch.
1625                          */
1626                         err = -EBUSY;
1627                         goto out;
1628                 }
1629         }
1630
1631         /* success */
1632         iwl_teardown_interface(priv, vif, true);
1633         vif->type = newviftype;
1634         vif->p2p = newp2p;
1635         err = iwl_setup_interface(priv, ctx);
1636         WARN_ON(err);
1637         /*
1638          * We've switched internally, but submitting to the
1639          * device may have failed for some reason. Mask this
1640          * error, because otherwise mac80211 will not switch
1641          * (and set the interface type back) and we'll be
1642          * out of sync with it.
1643          */
1644         err = 0;
1645
1646  out:
1647         mutex_unlock(&priv->mutex);
1648         IWL_DEBUG_MAC80211(priv, "leave\n");
1649
1650         return err;
1651 }
1652
1653 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1654                               struct ieee80211_vif *vif,
1655                               struct cfg80211_scan_request *req)
1656 {
1657         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1658         int ret;
1659
1660         IWL_DEBUG_MAC80211(priv, "enter\n");
1661
1662         if (req->n_channels == 0)
1663                 return -EINVAL;
1664
1665         mutex_lock(&priv->mutex);
1666
1667         /*
1668          * If an internal scan is in progress, just set
1669          * up the scan_request as per above.
1670          */
1671         if (priv->scan_type != IWL_SCAN_NORMAL) {
1672                 IWL_DEBUG_SCAN(priv,
1673                                "SCAN request during internal scan - defer\n");
1674                 priv->scan_request = req;
1675                 priv->scan_vif = vif;
1676                 ret = 0;
1677         } else {
1678                 priv->scan_request = req;
1679                 priv->scan_vif = vif;
1680                 /*
1681                  * mac80211 will only ask for one band at a time
1682                  * so using channels[0] here is ok
1683                  */
1684                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1685                                         req->channels[0]->band);
1686                 if (ret) {
1687                         priv->scan_request = NULL;
1688                         priv->scan_vif = NULL;
1689                 }
1690         }
1691
1692         IWL_DEBUG_MAC80211(priv, "leave\n");
1693
1694         mutex_unlock(&priv->mutex);
1695
1696         return ret;
1697 }
1698
1699 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1700 {
1701         struct iwl_addsta_cmd cmd = {
1702                 .mode = STA_CONTROL_MODIFY_MSK,
1703                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1704                 .sta.sta_id = sta_id,
1705         };
1706
1707         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1708 }
1709
1710 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1711                                   struct ieee80211_vif *vif,
1712                                   enum sta_notify_cmd cmd,
1713                                   struct ieee80211_sta *sta)
1714 {
1715         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1716         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1717         int sta_id;
1718
1719         IWL_DEBUG_MAC80211(priv, "enter\n");
1720
1721         switch (cmd) {
1722         case STA_NOTIFY_SLEEP:
1723                 WARN_ON(!sta_priv->client);
1724                 sta_priv->asleep = true;
1725                 if (atomic_read(&sta_priv->pending_frames) > 0)
1726                         ieee80211_sta_block_awake(hw, sta, true);
1727                 break;
1728         case STA_NOTIFY_AWAKE:
1729                 WARN_ON(!sta_priv->client);
1730                 if (!sta_priv->asleep)
1731                         break;
1732                 sta_priv->asleep = false;
1733                 sta_id = iwl_sta_id(sta);
1734                 if (sta_id != IWL_INVALID_STATION)
1735                         iwl_sta_modify_ps_wake(priv, sta_id);
1736                 break;
1737         default:
1738                 break;
1739         }
1740         IWL_DEBUG_MAC80211(priv, "leave\n");
1741 }
1742
1743 struct ieee80211_ops iwlagn_hw_ops = {
1744         .tx = iwlagn_mac_tx,
1745         .start = iwlagn_mac_start,
1746         .stop = iwlagn_mac_stop,
1747 #ifdef CONFIG_PM_SLEEP
1748         .suspend = iwlagn_mac_suspend,
1749         .resume = iwlagn_mac_resume,
1750         .set_wakeup = iwlagn_mac_set_wakeup,
1751 #endif
1752         .add_interface = iwlagn_mac_add_interface,
1753         .remove_interface = iwlagn_mac_remove_interface,
1754         .change_interface = iwlagn_mac_change_interface,
1755         .config = iwlagn_mac_config,
1756         .configure_filter = iwlagn_configure_filter,
1757         .set_key = iwlagn_mac_set_key,
1758         .update_tkip_key = iwlagn_mac_update_tkip_key,
1759         .set_rekey_data = iwlagn_mac_set_rekey_data,
1760         .conf_tx = iwlagn_mac_conf_tx,
1761         .bss_info_changed = iwlagn_bss_info_changed,
1762         .ampdu_action = iwlagn_mac_ampdu_action,
1763         .hw_scan = iwlagn_mac_hw_scan,
1764         .sta_notify = iwlagn_mac_sta_notify,
1765         .sta_state = iwlagn_mac_sta_state,
1766         .channel_switch = iwlagn_mac_channel_switch,
1767         .flush = iwlagn_mac_flush,
1768         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1769         .remain_on_channel = iwlagn_mac_remain_on_channel,
1770         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1771         .rssi_callback = iwlagn_mac_rssi_callback,
1772         .set_tim = iwlagn_mac_set_tim,
1773 };
1774
1775 /* This function both allocates and initializes hw and priv. */
1776 struct ieee80211_hw *iwl_alloc_all(void)
1777 {
1778         struct iwl_priv *priv;
1779         struct iwl_op_mode *op_mode;
1780         /* mac80211 allocates memory for this device instance, including
1781          *   space for this driver's private structure */
1782         struct ieee80211_hw *hw;
1783
1784         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1785                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1786         if (!hw)
1787                 goto out;
1788
1789         op_mode = hw->priv;
1790         priv = IWL_OP_MODE_GET_DVM(op_mode);
1791         priv->hw = hw;
1792
1793 out:
1794         return hw;
1795 }