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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/if_arp.h>
  40
  41 #include <net/ieee80211_radiotap.h>
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-io.h"
  47 #include "iwl-trans.h"
  48 #include "iwl-op-mode.h"
  49 #include "iwl-modparams.h"
  50
  51 #include "dev.h"
  52 #include "calib.h"
  53 #include "agn.h"
  54
  55 /*****************************************************************************
  56  *
  57  * mac80211 entry point functions
  58  *
  59  *****************************************************************************/
  60
  61 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  62         {
  63                 .max = 1,
  64                 .types = BIT(NL80211_IFTYPE_STATION),
  65         },
  66         {
  67                 .max = 1,
  68                 .types = BIT(NL80211_IFTYPE_AP),
  69         },
  70 };
  71
  72 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  73         {
  74                 .max = 2,
  75                 .types = BIT(NL80211_IFTYPE_STATION),
  76         },
  77 };
  78
  79 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  80         {
  81                 .max = 1,
  82                 .types = BIT(NL80211_IFTYPE_STATION),
  83         },
  84         {
  85                 .max = 1,
  86                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  87                          BIT(NL80211_IFTYPE_AP),
  88         },
  89 };
  90
  91 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  92         {
  93                 .max = 2,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
  99         },
 100 };
 101
 102 static const struct ieee80211_iface_combination
 103 iwlagn_iface_combinations_dualmode[] = {
 104         { .num_different_channels = 1,
 105           .max_interfaces = 2,
 106           .beacon_int_infra_match = true,
 107           .limits = iwlagn_sta_ap_limits,
 108           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 109         },
 110         { .num_different_channels = 1,
 111           .max_interfaces = 2,
 112           .limits = iwlagn_2sta_limits,
 113           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 114         },
 115 };
 116
 117 static const struct ieee80211_iface_combination
 118 iwlagn_iface_combinations_p2p[] = {
 119         { .num_different_channels = 1,
 120           .max_interfaces = 2,
 121           .beacon_int_infra_match = true,
 122           .limits = iwlagn_p2p_sta_go_limits,
 123           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 124         },
 125         { .num_different_channels = 1,
 126           .max_interfaces = 2,
 127           .limits = iwlagn_p2p_2sta_limits,
 128           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 129         },
 130 };
 131
 132 /*
 133  * Not a mac80211 entry point function, but it fits in with all the
 134  * other mac80211 functions grouped here.
 135  */
 136 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 137                               const struct iwl_ucode_capabilities *capa)
 138 {
 139         int ret;
 140         struct ieee80211_hw *hw = priv->hw;
 141         struct iwl_rxon_context *ctx;
 142
 143         hw->rate_control_algorithm = "iwl-agn-rs";
 144
 145         /* Tell mac80211 our characteristics */
 146         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 147                     IEEE80211_HW_AMPDU_AGGREGATION |
 148                     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 149                     IEEE80211_HW_SPECTRUM_MGMT |
 150                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 151                     IEEE80211_HW_QUEUE_CONTROL |
 152                     IEEE80211_HW_SUPPORTS_PS |
 153                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 154                     IEEE80211_HW_WANT_MONITOR_VIF;
 155
 156         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 157         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 158
 159         /*
 160          * Including the following line will crash some AP's.  This
 161          * workaround removes the stimulus which causes the crash until
 162          * the AP software can be fixed.
 163         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 164          */
 165
 166         if (priv->nvm_data->sku_cap_11n_enable)
 167                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 168                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 169
 170         /*
 171          * Enable 11w if advertised by firmware and software crypto
 172          * is not enabled (as the firmware will interpret some mgmt
 173          * packets, so enabling it with software crypto isn't safe)
 174          */
 175         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 176             !iwlwifi_mod_params.sw_crypto)
 177                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 178
 179         hw->sta_data_size = sizeof(struct iwl_station_priv);
 180         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 181
 182         for_each_context(priv, ctx) {
 183                 hw->wiphy->interface_modes |= ctx->interface_modes;
 184                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 185         }
 186
 187         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 188
 189         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 190                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 191                 hw->wiphy->n_iface_combinations =
 192                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 193         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 194                 hw->wiphy->iface_combinations =
 195                         iwlagn_iface_combinations_dualmode;
 196                 hw->wiphy->n_iface_combinations =
 197                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 198         }
 199
 200         hw->wiphy->max_remain_on_channel_duration = 500;
 201
 202         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 203                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 204                             WIPHY_FLAG_IBSS_RSN;
 205
 206 #ifdef CONFIG_PM_SLEEP
 207         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 208             priv->trans->ops->d3_suspend &&
 209             priv->trans->ops->d3_resume &&
 210             device_can_wakeup(priv->trans->dev)) {
 211                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 212                                           WIPHY_WOWLAN_DISCONNECT |
 213                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 214                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 215                 if (!iwlwifi_mod_params.sw_crypto)
 216                         hw->wiphy->wowlan.flags |=
 217                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 218                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 219
 220                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 221                 hw->wiphy->wowlan.pattern_min_len =
 222                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 223                 hw->wiphy->wowlan.pattern_max_len =
 224                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 225         }
 226 #endif
 227
 228         if (iwlwifi_mod_params.power_save)
 229                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 230         else
 231                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 232
 233         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 234         /* we create the 802.11 header and a max-length SSID element */
 235         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 236
 237         /*
 238          * We don't use all queues: 4 and 9 are unused and any
 239          * aggregation queue gets mapped down to the AC queue.
 240          */
 241         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 242
 243         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 244
 245         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 246                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 247                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 248         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 249                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 250                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 251
 252         hw->wiphy->hw_version = priv->trans->hw_id;
 253
 254         iwl_leds_init(priv);
 255
 256         ret = ieee80211_register_hw(priv->hw);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 259                 iwl_leds_exit(priv);
 260                 return ret;
 261         }
 262         priv->mac80211_registered = 1;
 263
 264         return 0;
 265 }
 266
 267 void iwlagn_mac_unregister(struct iwl_priv *priv)
 268 {
 269         if (!priv->mac80211_registered)
 270                 return;
 271         iwl_leds_exit(priv);
 272         ieee80211_unregister_hw(priv->hw);
 273         priv->mac80211_registered = 0;
 274 }
 275
 276 static int __iwl_up(struct iwl_priv *priv)
 277 {
 278         struct iwl_rxon_context *ctx;
 279         int ret;
 280
 281         lockdep_assert_held(&priv->mutex);
 282
 283         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 284                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 285                 return -EIO;
 286         }
 287
 288         for_each_context(priv, ctx) {
 289                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 290                 if (ret) {
 291                         iwl_dealloc_bcast_stations(priv);
 292                         return ret;
 293                 }
 294         }
 295
 296         ret = iwl_run_init_ucode(priv);
 297         if (ret) {
 298                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 299                 goto error;
 300         }
 301
 302         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 303         if (ret) {
 304                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 305                 goto error;
 306         }
 307
 308         ret = iwl_alive_start(priv);
 309         if (ret)
 310                 goto error;
 311         return 0;
 312
 313  error:
 314         set_bit(STATUS_EXIT_PENDING, &priv->status);
 315         iwl_down(priv);
 316         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 317
 318         IWL_ERR(priv, "Unable to initialize device.\n");
 319         return ret;
 320 }
 321
 322 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 323 {
 324         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 325         int ret;
 326
 327         IWL_DEBUG_MAC80211(priv, "enter\n");
 328
 329         /* we should be verifying the device is ready to be opened */
 330         mutex_lock(&priv->mutex);
 331         ret = __iwl_up(priv);
 332         mutex_unlock(&priv->mutex);
 333         if (ret)
 334                 return ret;
 335
 336         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 337
 338         /* Now we should be done, and the READY bit should be set. */
 339         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 340                 ret = -EIO;
 341
 342         iwlagn_led_enable(priv);
 343
 344         priv->is_open = 1;
 345         IWL_DEBUG_MAC80211(priv, "leave\n");
 346         return 0;
 347 }
 348
 349 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 350 {
 351         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354
 355         if (!priv->is_open)
 356                 return;
 357
 358         priv->is_open = 0;
 359
 360         mutex_lock(&priv->mutex);
 361         iwl_down(priv);
 362         mutex_unlock(&priv->mutex);
 363
 364         iwl_cancel_deferred_work(priv);
 365
 366         flush_workqueue(priv->workqueue);
 367
 368         /* User space software may expect getting rfkill changes
 369          * even if interface is down, trans->down will leave the RF
 370          * kill interrupt enabled
 371          */
 372         iwl_trans_stop_hw(priv->trans, false);
 373
 374         IWL_DEBUG_MAC80211(priv, "leave\n");
 375 }
 376
 377 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 378                                       struct ieee80211_vif *vif,
 379                                       struct cfg80211_gtk_rekey_data *data)
 380 {
 381         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 382
 383         if (iwlwifi_mod_params.sw_crypto)
 384                 return;
 385
 386         IWL_DEBUG_MAC80211(priv, "enter\n");
 387         mutex_lock(&priv->mutex);
 388
 389         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 390                 goto out;
 391
 392         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 393         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 394         priv->replay_ctr =
 395                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 396         priv->have_rekey_data = true;
 397
 398  out:
 399         mutex_unlock(&priv->mutex);
 400         IWL_DEBUG_MAC80211(priv, "leave\n");
 401 }
 402
 403 #ifdef CONFIG_PM_SLEEP
 404
 405 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 406                               struct cfg80211_wowlan *wowlan)
 407 {
 408         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 409         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 410         int ret;
 411
 412         if (WARN_ON(!wowlan))
 413                 return -EINVAL;
 414
 415         IWL_DEBUG_MAC80211(priv, "enter\n");
 416         mutex_lock(&priv->mutex);
 417
 418         /* Don't attempt WoWLAN when not associated, tear down instead. */
 419         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 420             !iwl_is_associated_ctx(ctx)) {
 421                 ret = 1;
 422                 goto out;
 423         }
 424
 425         ret = iwlagn_suspend(priv, wowlan);
 426         if (ret)
 427                 goto error;
 428
 429         iwl_trans_d3_suspend(priv->trans);
 430
 431         goto out;
 432
 433  error:
 434         priv->wowlan = false;
 435         iwlagn_prepare_restart(priv);
 436         ieee80211_restart_hw(priv->hw);
 437  out:
 438         mutex_unlock(&priv->mutex);
 439         IWL_DEBUG_MAC80211(priv, "leave\n");
 440
 441         return ret;
 442 }
 443
 444 struct iwl_resume_data {
 445         struct iwl_priv *priv;
 446         struct iwlagn_wowlan_status *cmd;
 447         bool valid;
 448 };
 449
 450 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 451                                  struct iwl_rx_packet *pkt, void *data)
 452 {
 453         struct iwl_resume_data *resume_data = data;
 454         struct iwl_priv *priv = resume_data->priv;
 455         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 456
 457         if (len - 4 != sizeof(*resume_data->cmd)) {
 458                 IWL_ERR(priv, "rx wrong size data\n");
 459                 return true;
 460         }
 461         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 462         resume_data->valid = true;
 463
 464         return true;
 465 }
 466
 467 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 468 {
 469         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 470         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 471         struct ieee80211_vif *vif;
 472         u32 base;
 473         int ret;
 474         enum iwl_d3_status d3_status;
 475         struct error_table_start {
 476                 /* cf. struct iwl_error_event_table */
 477                 u32 valid;
 478                 u32 error_id;
 479         } err_info;
 480         struct iwl_notification_wait status_wait;
 481         static const u8 status_cmd[] = {
 482                 REPLY_WOWLAN_GET_STATUS,
 483         };
 484         struct iwlagn_wowlan_status status_data = {};
 485         struct iwl_resume_data resume_data = {
 486                 .priv = priv,
 487                 .cmd = &status_data,
 488                 .valid = false,
 489         };
 490         struct cfg80211_wowlan_wakeup wakeup = {
 491                 .pattern_idx = -1,
 492         };
 493 #ifdef CONFIG_IWLWIFI_DEBUGFS
 494         const struct fw_img *img;
 495 #endif
 496
 497         IWL_DEBUG_MAC80211(priv, "enter\n");
 498         mutex_lock(&priv->mutex);
 499
 500         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 501         vif = ctx->vif;
 502
 503         ret = iwl_trans_d3_resume(priv->trans, &d3_status);
 504         if (ret)
 505                 goto out_unlock;
 506
 507         if (d3_status != IWL_D3_STATUS_ALIVE) {
 508                 IWL_INFO(priv, "Device was reset during suspend\n");
 509                 goto out_unlock;
 510         }
 511
 512         base = priv->device_pointers.error_event_table;
 513         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 514                 IWL_WARN(priv, "Invalid error table during resume!\n");
 515                 goto out_unlock;
 516         }
 517
 518         iwl_trans_read_mem_bytes(priv->trans, base,
 519                                  &err_info, sizeof(err_info));
 520
 521         if (err_info.valid) {
 522                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 523                          err_info.valid, err_info.error_id);
 524                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 525                         wakeup.rfkill_release = true;
 526                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 527                                                        GFP_KERNEL);
 528                 }
 529                 goto out_unlock;
 530         }
 531
 532 #ifdef CONFIG_IWLWIFI_DEBUGFS
 533         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 534         if (!priv->wowlan_sram)
 535                 priv->wowlan_sram =
 536                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 537                                 GFP_KERNEL);
 538
 539         if (priv->wowlan_sram)
 540                 iwl_trans_read_mem(priv->trans, 0x800000,
 541                                    priv->wowlan_sram,
 542                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 543 #endif
 544
 545         /*
 546          * This is very strange. The GET_STATUS command is sent but the device
 547          * doesn't reply properly, it seems it doesn't close the RBD so one is
 548          * always left open ... As a result, we need to send another command
 549          * and have to reset the driver afterwards. As we need to switch to
 550          * runtime firmware again that'll happen.
 551          */
 552
 553         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 554                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 555                                    &resume_data);
 556
 557         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 558         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 559         /* an RBD is left open in the firmware now! */
 560
 561         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 562         if (ret)
 563                 goto out_unlock;
 564
 565         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 566                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 567                 struct cfg80211_wowlan_wakeup *wakeup_report;
 568
 569                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 570
 571                 if (reasons) {
 572                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 573                                 wakeup.magic_pkt = true;
 574                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 575                                 wakeup.pattern_idx = status_data.pattern_number;
 576                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 577                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 578                                 wakeup.disconnect = true;
 579                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 580                                 wakeup.gtk_rekey_failure = true;
 581                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 582                                 wakeup.eap_identity_req = true;
 583                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 584                                 wakeup.four_way_handshake = true;
 585                         wakeup_report = &wakeup;
 586                 } else {
 587                         wakeup_report = NULL;
 588                 }
 589
 590                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 591         }
 592
 593         priv->wowlan = false;
 594
 595         iwlagn_prepare_restart(priv);
 596
 597         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 598         iwl_connection_init_rx_config(priv, ctx);
 599         iwlagn_set_rxon_chain(priv, ctx);
 600
 601  out_unlock:
 602         mutex_unlock(&priv->mutex);
 603         IWL_DEBUG_MAC80211(priv, "leave\n");
 604
 605         ieee80211_resume_disconnect(vif);
 606
 607         return 1;
 608 }
 609
 610 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 611 {
 612         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 613
 614         device_set_wakeup_enable(priv->trans->dev, enabled);
 615 }
 616 #endif
 617
 618 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 619                           struct ieee80211_tx_control *control,
 620                           struct sk_buff *skb)
 621 {
 622         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 623
 624         if (iwlagn_tx_skb(priv, control->sta, skb))
 625                 ieee80211_free_txskb(hw, skb);
 626 }
 627
 628 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 629                                        struct ieee80211_vif *vif,
 630                                        struct ieee80211_key_conf *keyconf,
 631                                        struct ieee80211_sta *sta,
 632                                        u32 iv32, u16 *phase1key)
 633 {
 634         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 635
 636         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 637 }
 638
 639 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 640                               struct ieee80211_vif *vif,
 641                               struct ieee80211_sta *sta,
 642                               struct ieee80211_key_conf *key)
 643 {
 644         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 645         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 646         struct iwl_rxon_context *ctx = vif_priv->ctx;
 647         int ret;
 648         bool is_default_wep_key = false;
 649
 650         IWL_DEBUG_MAC80211(priv, "enter\n");
 651
 652         if (iwlwifi_mod_params.sw_crypto) {
 653                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 654                 return -EOPNOTSUPP;
 655         }
 656
 657         switch (key->cipher) {
 658         case WLAN_CIPHER_SUITE_TKIP:
 659                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 660                 /* fall through */
 661         case WLAN_CIPHER_SUITE_CCMP:
 662                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 663                 break;
 664         default:
 665                 break;
 666         }
 667
 668         /*
 669          * We could program these keys into the hardware as well, but we
 670          * don't expect much multicast traffic in IBSS and having keys
 671          * for more stations is probably more useful.
 672          *
 673          * Mark key TX-only and return 0.
 674          */
 675         if (vif->type == NL80211_IFTYPE_ADHOC &&
 676             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 677                 key->hw_key_idx = WEP_INVALID_OFFSET;
 678                 return 0;
 679         }
 680
 681         /* If they key was TX-only, accept deletion */
 682         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 683                 return 0;
 684
 685         mutex_lock(&priv->mutex);
 686         iwl_scan_cancel_timeout(priv, 100);
 687
 688         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 689
 690         /*
 691          * If we are getting WEP group key and we didn't receive any key mapping
 692          * so far, we are in legacy wep mode (group key only), otherwise we are
 693          * in 1X mode.
 694          * In legacy wep mode, we use another host command to the uCode.
 695          */
 696         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 697              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 698                 if (cmd == SET_KEY)
 699                         is_default_wep_key = !ctx->key_mapping_keys;
 700                 else
 701                         is_default_wep_key =
 702                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 703         }
 704
 705
 706         switch (cmd) {
 707         case SET_KEY:
 708                 if (is_default_wep_key) {
 709                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 710                         break;
 711                 }
 712                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 713                 if (ret) {
 714                         /*
 715                          * can't add key for RX, but we don't need it
 716                          * in the device for TX so still return 0
 717                          */
 718                         ret = 0;
 719                         key->hw_key_idx = WEP_INVALID_OFFSET;
 720                 }
 721
 722                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 723                 break;
 724         case DISABLE_KEY:
 725                 if (is_default_wep_key)
 726                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 727                 else
 728                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 729
 730                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 731                 break;
 732         default:
 733                 ret = -EINVAL;
 734         }
 735
 736         mutex_unlock(&priv->mutex);
 737         IWL_DEBUG_MAC80211(priv, "leave\n");
 738
 739         return ret;
 740 }
 741
 742 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 743                                    struct ieee80211_vif *vif,
 744                                    enum ieee80211_ampdu_mlme_action action,
 745                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 746                                    u8 buf_size)
 747 {
 748         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 749         int ret = -EINVAL;
 750         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 751
 752         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 753                      sta->addr, tid);
 754
 755         if (!(priv->nvm_data->sku_cap_11n_enable))
 756                 return -EACCES;
 757
 758         IWL_DEBUG_MAC80211(priv, "enter\n");
 759         mutex_lock(&priv->mutex);
 760
 761         switch (action) {
 762         case IEEE80211_AMPDU_RX_START:
 763                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 764                         break;
 765                 IWL_DEBUG_HT(priv, "start Rx\n");
 766                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 767                 break;
 768         case IEEE80211_AMPDU_RX_STOP:
 769                 IWL_DEBUG_HT(priv, "stop Rx\n");
 770                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 771                 break;
 772         case IEEE80211_AMPDU_TX_START:
 773                 if (!priv->trans->ops->txq_enable)
 774                         break;
 775                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 776                         break;
 777                 IWL_DEBUG_HT(priv, "start Tx\n");
 778                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 779                 break;
 780         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 781         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 782                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 783                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 784                 break;
 785         case IEEE80211_AMPDU_TX_STOP_CONT:
 786                 IWL_DEBUG_HT(priv, "stop Tx\n");
 787                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 788                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 789                         priv->agg_tids_count--;
 790                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 791                                      priv->agg_tids_count);
 792                 }
 793                 if (!priv->agg_tids_count &&
 794                     priv->hw_params.use_rts_for_aggregation) {
 795                         /*
 796                          * switch off RTS/CTS if it was previously enabled
 797                          */
 798                         sta_priv->lq_sta.lq.general_params.flags &=
 799                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 800                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 801                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 802                 }
 803                 break;
 804         case IEEE80211_AMPDU_TX_OPERATIONAL:
 805                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 806                 break;
 807         }
 808         mutex_unlock(&priv->mutex);
 809         IWL_DEBUG_MAC80211(priv, "leave\n");
 810         return ret;
 811 }
 812
 813 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 814                               struct ieee80211_vif *vif,
 815                               struct ieee80211_sta *sta)
 816 {
 817         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 818         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 819         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 820         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 821         int ret;
 822         u8 sta_id;
 823
 824         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 825                         sta->addr);
 826         sta_priv->sta_id = IWL_INVALID_STATION;
 827
 828         atomic_set(&sta_priv->pending_frames, 0);
 829         if (vif->type == NL80211_IFTYPE_AP)
 830                 sta_priv->client = true;
 831
 832         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 833                                      is_ap, sta, &sta_id);
 834         if (ret) {
 835                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 836                         sta->addr, ret);
 837                 /* Should we return success if return code is EEXIST ? */
 838                 return ret;
 839         }
 840
 841         sta_priv->sta_id = sta_id;
 842
 843         return 0;
 844 }
 845
 846 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 847                                  struct ieee80211_vif *vif,
 848                                  struct ieee80211_sta *sta)
 849 {
 850         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 851         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 852         int ret;
 853
 854         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 855
 856         if (vif->type == NL80211_IFTYPE_STATION) {
 857                 /*
 858                  * Station will be removed from device when the RXON
 859                  * is set to unassociated -- just deactivate it here
 860                  * to avoid re-programming it.
 861                  */
 862                 ret = 0;
 863                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 864         } else {
 865                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 866                 if (ret)
 867                         IWL_DEBUG_QUIET_RFKILL(priv,
 868                                 "Error removing station %pM\n", sta->addr);
 869         }
 870         return ret;
 871 }
 872
 873 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 874                                 struct ieee80211_vif *vif,
 875                                 struct ieee80211_sta *sta,
 876                                 enum ieee80211_sta_state old_state,
 877                                 enum ieee80211_sta_state new_state)
 878 {
 879         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 880         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 881         enum {
 882                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 883         } op = NONE;
 884         int ret;
 885
 886         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 887                            sta->addr, old_state, new_state);
 888
 889         mutex_lock(&priv->mutex);
 890         if (vif->type == NL80211_IFTYPE_STATION) {
 891                 if (old_state == IEEE80211_STA_NOTEXIST &&
 892                     new_state == IEEE80211_STA_NONE)
 893                         op = ADD;
 894                 else if (old_state == IEEE80211_STA_NONE &&
 895                          new_state == IEEE80211_STA_NOTEXIST)
 896                         op = REMOVE;
 897                 else if (old_state == IEEE80211_STA_AUTH &&
 898                          new_state == IEEE80211_STA_ASSOC)
 899                         op = HT_RATE_INIT;
 900         } else {
 901                 if (old_state == IEEE80211_STA_AUTH &&
 902                     new_state == IEEE80211_STA_ASSOC)
 903                         op = ADD_RATE_INIT;
 904                 else if (old_state == IEEE80211_STA_ASSOC &&
 905                          new_state == IEEE80211_STA_AUTH)
 906                         op = REMOVE;
 907         }
 908
 909         switch (op) {
 910         case ADD:
 911                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 912                 if (ret)
 913                         break;
 914                 /*
 915                  * Clear the in-progress flag, the AP station entry was added
 916                  * but we'll initialize LQ only when we've associated (which
 917                  * would also clear the in-progress flag). This is necessary
 918                  * in case we never initialize LQ because association fails.
 919                  */
 920                 spin_lock_bh(&priv->sta_lock);
 921                 priv->stations[iwl_sta_id(sta)].used &=
 922                         ~IWL_STA_UCODE_INPROGRESS;
 923                 spin_unlock_bh(&priv->sta_lock);
 924                 break;
 925         case REMOVE:
 926                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 927                 break;
 928         case ADD_RATE_INIT:
 929                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 930                 if (ret)
 931                         break;
 932                 /* Initialize rate scaling */
 933                 IWL_DEBUG_INFO(priv,
 934                                "Initializing rate scaling for station %pM\n",
 935                                sta->addr);
 936                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 937                 ret = 0;
 938                 break;
 939         case HT_RATE_INIT:
 940                 /* Initialize rate scaling */
 941                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 942                 if (ret)
 943                         break;
 944                 IWL_DEBUG_INFO(priv,
 945                                "Initializing rate scaling for station %pM\n",
 946                                sta->addr);
 947                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 948                 ret = 0;
 949                 break;
 950         default:
 951                 ret = 0;
 952                 break;
 953         }
 954
 955         /*
 956          * mac80211 might WARN if we fail, but due the way we
 957          * (badly) handle hard rfkill, we might fail here
 958          */
 959         if (iwl_is_rfkill(priv))
 960                 ret = 0;
 961
 962         mutex_unlock(&priv->mutex);
 963         IWL_DEBUG_MAC80211(priv, "leave\n");
 964
 965         return ret;
 966 }
 967
 968 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 969                                       struct ieee80211_channel_switch *ch_switch)
 970 {
 971         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 972         struct ieee80211_conf *conf = &hw->conf;
 973         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 974         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 975         /*
 976          * MULTI-FIXME
 977          * When we add support for multiple interfaces, we need to
 978          * revisit this. The channel switch command in the device
 979          * only affects the BSS context, but what does that really
 980          * mean? And what if we get a CSA on the second interface?
 981          * This needs a lot of work.
 982          */
 983         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 984         u16 ch;
 985
 986         IWL_DEBUG_MAC80211(priv, "enter\n");
 987
 988         mutex_lock(&priv->mutex);
 989
 990         if (iwl_is_rfkill(priv))
 991                 goto out;
 992
 993         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 994             test_bit(STATUS_SCANNING, &priv->status) ||
 995             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 996                 goto out;
 997
 998         if (!iwl_is_associated_ctx(ctx))
 999                 goto out;
1000
1001         if (!priv->lib->set_channel_switch)
1002                 goto out;
1003
1004         ch = channel->hw_value;
1005         if (le16_to_cpu(ctx->active.channel) == ch)
1006                 goto out;
1007
1008         priv->current_ht_config.smps = conf->smps_mode;
1009
1010         /* Configure HT40 channels */
1011         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1012         case NL80211_CHAN_NO_HT:
1013         case NL80211_CHAN_HT20:
1014                 ctx->ht.is_40mhz = false;
1015                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1016                 break;
1017         case NL80211_CHAN_HT40MINUS:
1018                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1019                 ctx->ht.is_40mhz = true;
1020                 break;
1021         case NL80211_CHAN_HT40PLUS:
1022                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1023                 ctx->ht.is_40mhz = true;
1024                 break;
1025         }
1026
1027         if ((le16_to_cpu(ctx->staging.channel) != ch))
1028                 ctx->staging.flags = 0;
1029
1030         iwl_set_rxon_channel(priv, channel, ctx);
1031         iwl_set_rxon_ht(priv, ht_conf);
1032         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1033
1034         /*
1035          * at this point, staging_rxon has the
1036          * configuration for channel switch
1037          */
1038         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1039         priv->switch_channel = cpu_to_le16(ch);
1040         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1041                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1042                 priv->switch_channel = 0;
1043                 ieee80211_chswitch_done(ctx->vif, false);
1044         }
1045
1046 out:
1047         mutex_unlock(&priv->mutex);
1048         IWL_DEBUG_MAC80211(priv, "leave\n");
1049 }
1050
1051 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1052 {
1053         /*
1054          * MULTI-FIXME
1055          * See iwlagn_mac_channel_switch.
1056          */
1057         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1058
1059         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1060                 return;
1061
1062         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1063                 ieee80211_chswitch_done(ctx->vif, is_success);
1064 }
1065
1066 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1067                                     unsigned int changed_flags,
1068                                     unsigned int *total_flags,
1069                                     u64 multicast)
1070 {
1071         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1072         __le32 filter_or = 0, filter_nand = 0;
1073         struct iwl_rxon_context *ctx;
1074
1075 #define CHK(test, flag) do { \
1076         if (*total_flags & (test))              \
1077                 filter_or |= (flag);            \
1078         else                                    \
1079                 filter_nand |= (flag);          \
1080         } while (0)
1081
1082         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1083                         changed_flags, *total_flags);
1084
1085         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1086         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1087         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1088         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1089
1090 #undef CHK
1091
1092         mutex_lock(&priv->mutex);
1093
1094         for_each_context(priv, ctx) {
1095                 ctx->staging.filter_flags &= ~filter_nand;
1096                 ctx->staging.filter_flags |= filter_or;
1097
1098                 /*
1099                  * Not committing directly because hardware can perform a scan,
1100                  * but we'll eventually commit the filter flags change anyway.
1101                  */
1102         }
1103
1104         mutex_unlock(&priv->mutex);
1105
1106         /*
1107          * Receiving all multicast frames is always enabled by the
1108          * default flags setup in iwl_connection_init_rx_config()
1109          * since we currently do not support programming multicast
1110          * filters into the device.
1111          */
1112         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1113                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1114 }
1115
1116 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1117 {
1118         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1119
1120         mutex_lock(&priv->mutex);
1121         IWL_DEBUG_MAC80211(priv, "enter\n");
1122
1123         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1124                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1125                 goto done;
1126         }
1127         if (iwl_is_rfkill(priv)) {
1128                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1129                 goto done;
1130         }
1131
1132         /*
1133          * mac80211 will not push any more frames for transmit
1134          * until the flush is completed
1135          */
1136         if (drop) {
1137                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1138                 if (iwlagn_txfifo_flush(priv, 0)) {
1139                         IWL_ERR(priv, "flush request fail\n");
1140                         goto done;
1141                 }
1142         }
1143         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1144         iwl_trans_wait_tx_queue_empty(priv->trans);
1145 done:
1146         mutex_unlock(&priv->mutex);
1147         IWL_DEBUG_MAC80211(priv, "leave\n");
1148 }
1149
1150 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1151                                      struct ieee80211_vif *vif,
1152                                      struct ieee80211_channel *channel,
1153                                      int duration,
1154                                      enum ieee80211_roc_type type)
1155 {
1156         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1157         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1158         int err = 0;
1159
1160         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1161                 return -EOPNOTSUPP;
1162
1163         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1164                 return -EOPNOTSUPP;
1165
1166         IWL_DEBUG_MAC80211(priv, "enter\n");
1167         mutex_lock(&priv->mutex);
1168
1169         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1170                 /* mac80211 should not scan while ROC or ROC while scanning */
1171                 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
1172                         err = -EBUSY;
1173                         goto out;
1174                 }
1175
1176                 iwl_scan_cancel_timeout(priv, 100);
1177
1178                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
1179                         err = -EBUSY;
1180                         goto out;
1181                 }
1182         }
1183
1184         priv->hw_roc_channel = channel;
1185         /* convert from ms to TU */
1186         priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
1187         priv->hw_roc_start_notified = false;
1188         cancel_delayed_work(&priv->hw_roc_disable_work);
1189
1190         if (!ctx->is_active) {
1191                 static const struct iwl_qos_info default_qos_data = {
1192                         .def_qos_parm = {
1193                                 .ac[0] = {
1194                                         .cw_min = cpu_to_le16(3),
1195                                         .cw_max = cpu_to_le16(7),
1196                                         .aifsn = 2,
1197                                         .edca_txop = cpu_to_le16(1504),
1198                                 },
1199                                 .ac[1] = {
1200                                         .cw_min = cpu_to_le16(7),
1201                                         .cw_max = cpu_to_le16(15),
1202                                         .aifsn = 2,
1203                                         .edca_txop = cpu_to_le16(3008),
1204                                 },
1205                                 .ac[2] = {
1206                                         .cw_min = cpu_to_le16(15),
1207                                         .cw_max = cpu_to_le16(1023),
1208                                         .aifsn = 3,
1209                                 },
1210                                 .ac[3] = {
1211                                         .cw_min = cpu_to_le16(15),
1212                                         .cw_max = cpu_to_le16(1023),
1213                                         .aifsn = 7,
1214                                 },
1215                         },
1216                 };
1217
1218                 ctx->is_active = true;
1219                 ctx->qos_data = default_qos_data;
1220                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1221                 memcpy(ctx->staging.node_addr,
1222                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1223                        ETH_ALEN);
1224                 memcpy(ctx->staging.bssid_addr,
1225                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1226                        ETH_ALEN);
1227                 err = iwlagn_commit_rxon(priv, ctx);
1228                 if (err)
1229                         goto out;
1230                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1231                                              RXON_FILTER_PROMISC_MSK |
1232                                              RXON_FILTER_CTL2HOST_MSK;
1233
1234                 err = iwlagn_commit_rxon(priv, ctx);
1235                 if (err) {
1236                         iwlagn_disable_roc(priv);
1237                         goto out;
1238                 }
1239                 priv->hw_roc_setup = true;
1240         }
1241
1242         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1243         if (err)
1244                 iwlagn_disable_roc(priv);
1245
1246  out:
1247         mutex_unlock(&priv->mutex);
1248         IWL_DEBUG_MAC80211(priv, "leave\n");
1249
1250         return err;
1251 }
1252
1253 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1254 {
1255         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1256
1257         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1258                 return -EOPNOTSUPP;
1259
1260         IWL_DEBUG_MAC80211(priv, "enter\n");
1261         mutex_lock(&priv->mutex);
1262         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1263         iwlagn_disable_roc(priv);
1264         mutex_unlock(&priv->mutex);
1265         IWL_DEBUG_MAC80211(priv, "leave\n");
1266
1267         return 0;
1268 }
1269
1270 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1271                                      struct ieee80211_vif *vif,
1272                                      enum ieee80211_rssi_event rssi_event)
1273 {
1274         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1275
1276         IWL_DEBUG_MAC80211(priv, "enter\n");
1277         mutex_lock(&priv->mutex);
1278
1279         if (priv->cfg->bt_params &&
1280                         priv->cfg->bt_params->advanced_bt_coexist) {
1281                 if (rssi_event == RSSI_EVENT_LOW)
1282                         priv->bt_enable_pspoll = true;
1283                 else if (rssi_event == RSSI_EVENT_HIGH)
1284                         priv->bt_enable_pspoll = false;
1285
1286                 iwlagn_send_advance_bt_config(priv);
1287         } else {
1288                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1289                                 "ignoring RSSI callback\n");
1290         }
1291
1292         mutex_unlock(&priv->mutex);
1293         IWL_DEBUG_MAC80211(priv, "leave\n");
1294 }
1295
1296 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1297                               struct ieee80211_sta *sta, bool set)
1298 {
1299         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1300
1301         queue_work(priv->workqueue, &priv->beacon_update);
1302
1303         return 0;
1304 }
1305
1306 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1307                               struct ieee80211_vif *vif, u16 queue,
1308                               const struct ieee80211_tx_queue_params *params)
1309 {
1310         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1311         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1312         struct iwl_rxon_context *ctx = vif_priv->ctx;
1313         int q;
1314
1315         if (WARN_ON(!ctx))
1316                 return -EINVAL;
1317
1318         IWL_DEBUG_MAC80211(priv, "enter\n");
1319
1320         if (!iwl_is_ready_rf(priv)) {
1321                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1322                 return -EIO;
1323         }
1324
1325         if (queue >= AC_NUM) {
1326                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1327                 return 0;
1328         }
1329
1330         q = AC_NUM - 1 - queue;
1331
1332         mutex_lock(&priv->mutex);
1333
1334         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1335                 cpu_to_le16(params->cw_min);
1336         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1337                 cpu_to_le16(params->cw_max);
1338         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1339         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1340                         cpu_to_le16((params->txop * 32));
1341
1342         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1343
1344         mutex_unlock(&priv->mutex);
1345
1346         IWL_DEBUG_MAC80211(priv, "leave\n");
1347         return 0;
1348 }
1349
1350 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1351 {
1352         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1353
1354         return priv->ibss_manager == IWL_IBSS_MANAGER;
1355 }
1356
1357 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1358 {
1359         iwl_connection_init_rx_config(priv, ctx);
1360
1361         iwlagn_set_rxon_chain(priv, ctx);
1362
1363         return iwlagn_commit_rxon(priv, ctx);
1364 }
1365
1366 static int iwl_setup_interface(struct iwl_priv *priv,
1367                                struct iwl_rxon_context *ctx)
1368 {
1369         struct ieee80211_vif *vif = ctx->vif;
1370         int err, ac;
1371
1372         lockdep_assert_held(&priv->mutex);
1373
1374         /*
1375          * This variable will be correct only when there's just
1376          * a single context, but all code using it is for hardware
1377          * that supports only one context.
1378          */
1379         priv->iw_mode = vif->type;
1380
1381         ctx->is_active = true;
1382
1383         err = iwl_set_mode(priv, ctx);
1384         if (err) {
1385                 if (!ctx->always_active)
1386                         ctx->is_active = false;
1387                 return err;
1388         }
1389
1390         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1391             vif->type == NL80211_IFTYPE_ADHOC) {
1392                 /*
1393                  * pretend to have high BT traffic as long as we
1394                  * are operating in IBSS mode, as this will cause
1395                  * the rate scaling etc. to behave as intended.
1396                  */
1397                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1398         }
1399
1400         /* set up queue mappings */
1401         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1402                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1403
1404         if (vif->type == NL80211_IFTYPE_AP)
1405                 vif->cab_queue = ctx->mcast_queue;
1406         else
1407                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1408
1409         return 0;
1410 }
1411
1412 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1413                                     struct ieee80211_vif *vif)
1414 {
1415         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1416         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1417         struct iwl_rxon_context *tmp, *ctx = NULL;
1418         int err;
1419         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1420         bool reset = false;
1421
1422         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1423                            viftype, vif->addr);
1424
1425         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1426
1427         mutex_lock(&priv->mutex);
1428
1429         iwlagn_disable_roc(priv);
1430
1431         if (!iwl_is_ready_rf(priv)) {
1432                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1433                 err = -EINVAL;
1434                 goto out;
1435         }
1436
1437         for_each_context(priv, tmp) {
1438                 u32 possible_modes =
1439                         tmp->interface_modes | tmp->exclusive_interface_modes;
1440
1441                 if (tmp->vif) {
1442                         /* On reset we need to add the same interface again */
1443                         if (tmp->vif == vif) {
1444                                 reset = true;
1445                                 ctx = tmp;
1446                                 break;
1447                         }
1448
1449                         /* check if this busy context is exclusive */
1450                         if (tmp->exclusive_interface_modes &
1451                                                 BIT(tmp->vif->type)) {
1452                                 err = -EINVAL;
1453                                 goto out;
1454                         }
1455                         continue;
1456                 }
1457
1458                 if (!(possible_modes & BIT(viftype)))
1459                         continue;
1460
1461                 /* have maybe usable context w/o interface */
1462                 ctx = tmp;
1463                 break;
1464         }
1465
1466         if (!ctx) {
1467                 err = -EOPNOTSUPP;
1468                 goto out;
1469         }
1470
1471         vif_priv->ctx = ctx;
1472         ctx->vif = vif;
1473
1474         /*
1475          * In SNIFFER device type, the firmware reports the FCS to
1476          * the host, rather than snipping it off. Unfortunately,
1477          * mac80211 doesn't (yet) provide a per-packet flag for
1478          * this, so that we have to set the hardware flag based
1479          * on the interfaces added. As the monitor interface can
1480          * only be present by itself, and will be removed before
1481          * other interfaces are added, this is safe.
1482          */
1483         if (vif->type == NL80211_IFTYPE_MONITOR)
1484                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1485         else
1486                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1487
1488         err = iwl_setup_interface(priv, ctx);
1489         if (!err || reset)
1490                 goto out;
1491
1492         ctx->vif = NULL;
1493         priv->iw_mode = NL80211_IFTYPE_STATION;
1494  out:
1495         mutex_unlock(&priv->mutex);
1496
1497         IWL_DEBUG_MAC80211(priv, "leave\n");
1498         return err;
1499 }
1500
1501 static void iwl_teardown_interface(struct iwl_priv *priv,
1502                                    struct ieee80211_vif *vif,
1503                                    bool mode_change)
1504 {
1505         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1506
1507         lockdep_assert_held(&priv->mutex);
1508
1509         if (priv->scan_vif == vif) {
1510                 iwl_scan_cancel_timeout(priv, 200);
1511                 iwl_force_scan_end(priv);
1512         }
1513
1514         if (!mode_change) {
1515                 iwl_set_mode(priv, ctx);
1516                 if (!ctx->always_active)
1517                         ctx->is_active = false;
1518         }
1519
1520         /*
1521          * When removing the IBSS interface, overwrite the
1522          * BT traffic load with the stored one from the last
1523          * notification, if any. If this is a device that
1524          * doesn't implement this, this has no effect since
1525          * both values are the same and zero.
1526          */
1527         if (vif->type == NL80211_IFTYPE_ADHOC)
1528                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1529 }
1530
1531 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1532                               struct ieee80211_vif *vif)
1533 {
1534         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1535         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1536
1537         IWL_DEBUG_MAC80211(priv, "enter\n");
1538
1539         mutex_lock(&priv->mutex);
1540
1541         if (WARN_ON(ctx->vif != vif)) {
1542                 struct iwl_rxon_context *tmp;
1543                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1544                 for_each_context(priv, tmp)
1545                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1546                                 tmp->ctxid, tmp, tmp->vif);
1547         }
1548         ctx->vif = NULL;
1549
1550         iwl_teardown_interface(priv, vif, false);
1551
1552         mutex_unlock(&priv->mutex);
1553
1554         IWL_DEBUG_MAC80211(priv, "leave\n");
1555
1556 }
1557
1558 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1559                                        struct ieee80211_vif *vif,
1560                                        enum nl80211_iftype newtype, bool newp2p)
1561 {
1562         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1563         struct iwl_rxon_context *ctx, *tmp;
1564         enum nl80211_iftype newviftype = newtype;
1565         u32 interface_modes;
1566         int err;
1567
1568         IWL_DEBUG_MAC80211(priv, "enter\n");
1569
1570         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1571
1572         mutex_lock(&priv->mutex);
1573
1574         ctx = iwl_rxon_ctx_from_vif(vif);
1575
1576         /*
1577          * To simplify this code, only support changes on the
1578          * BSS context. The PAN context is usually reassigned
1579          * by creating/removing P2P interfaces anyway.
1580          */
1581         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1582                 err = -EBUSY;
1583                 goto out;
1584         }
1585
1586         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1587                 /*
1588                  * Huh? But wait ... this can maybe happen when
1589                  * we're in the middle of a firmware restart!
1590                  */
1591                 err = -EBUSY;
1592                 goto out;
1593         }
1594
1595         /* Check if the switch is supported in the same context */
1596         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1597         if (!(interface_modes & BIT(newtype))) {
1598                 err = -EBUSY;
1599                 goto out;
1600         }
1601
1602         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1603                 for_each_context(priv, tmp) {
1604                         if (ctx == tmp)
1605                                 continue;
1606
1607                         if (!tmp->is_active)
1608                                 continue;
1609
1610                         /*
1611                          * The current mode switch would be exclusive, but
1612                          * another context is active ... refuse the switch.
1613                          */
1614                         err = -EBUSY;
1615                         goto out;
1616                 }
1617         }
1618
1619         /* success */
1620         iwl_teardown_interface(priv, vif, true);
1621         vif->type = newviftype;
1622         vif->p2p = newp2p;
1623         err = iwl_setup_interface(priv, ctx);
1624         WARN_ON(err);
1625         /*
1626          * We've switched internally, but submitting to the
1627          * device may have failed for some reason. Mask this
1628          * error, because otherwise mac80211 will not switch
1629          * (and set the interface type back) and we'll be
1630          * out of sync with it.
1631          */
1632         err = 0;
1633
1634  out:
1635         mutex_unlock(&priv->mutex);
1636         IWL_DEBUG_MAC80211(priv, "leave\n");
1637
1638         return err;
1639 }
1640
1641 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1642                               struct ieee80211_vif *vif,
1643                               struct cfg80211_scan_request *req)
1644 {
1645         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1646         int ret;
1647
1648         IWL_DEBUG_MAC80211(priv, "enter\n");
1649
1650         if (req->n_channels == 0)
1651                 return -EINVAL;
1652
1653         mutex_lock(&priv->mutex);
1654
1655         /*
1656          * If an internal scan is in progress, just set
1657          * up the scan_request as per above.
1658          */
1659         if (priv->scan_type != IWL_SCAN_NORMAL) {
1660                 IWL_DEBUG_SCAN(priv,
1661                                "SCAN request during internal scan - defer\n");
1662                 priv->scan_request = req;
1663                 priv->scan_vif = vif;
1664                 ret = 0;
1665         } else {
1666                 priv->scan_request = req;
1667                 priv->scan_vif = vif;
1668                 /*
1669                  * mac80211 will only ask for one band at a time
1670                  * so using channels[0] here is ok
1671                  */
1672                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1673                                         req->channels[0]->band);
1674                 if (ret) {
1675                         priv->scan_request = NULL;
1676                         priv->scan_vif = NULL;
1677                 }
1678         }
1679
1680         IWL_DEBUG_MAC80211(priv, "leave\n");
1681
1682         mutex_unlock(&priv->mutex);
1683
1684         return ret;
1685 }
1686
1687 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1688 {
1689         struct iwl_addsta_cmd cmd = {
1690                 .mode = STA_CONTROL_MODIFY_MSK,
1691                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1692                 .sta.sta_id = sta_id,
1693         };
1694
1695         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1696 }
1697
1698 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1699                                   struct ieee80211_vif *vif,
1700                                   enum sta_notify_cmd cmd,
1701                                   struct ieee80211_sta *sta)
1702 {
1703         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1704         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1705         int sta_id;
1706
1707         IWL_DEBUG_MAC80211(priv, "enter\n");
1708
1709         switch (cmd) {
1710         case STA_NOTIFY_SLEEP:
1711                 WARN_ON(!sta_priv->client);
1712                 sta_priv->asleep = true;
1713                 if (atomic_read(&sta_priv->pending_frames) > 0)
1714                         ieee80211_sta_block_awake(hw, sta, true);
1715                 break;
1716         case STA_NOTIFY_AWAKE:
1717                 WARN_ON(!sta_priv->client);
1718                 if (!sta_priv->asleep)
1719                         break;
1720                 sta_priv->asleep = false;
1721                 sta_id = iwl_sta_id(sta);
1722                 if (sta_id != IWL_INVALID_STATION)
1723                         iwl_sta_modify_ps_wake(priv, sta_id);
1724                 break;
1725         default:
1726                 break;
1727         }
1728         IWL_DEBUG_MAC80211(priv, "leave\n");
1729 }
1730
1731 struct ieee80211_ops iwlagn_hw_ops = {
1732         .tx = iwlagn_mac_tx,
1733         .start = iwlagn_mac_start,
1734         .stop = iwlagn_mac_stop,
1735 #ifdef CONFIG_PM_SLEEP
1736         .suspend = iwlagn_mac_suspend,
1737         .resume = iwlagn_mac_resume,
1738         .set_wakeup = iwlagn_mac_set_wakeup,
1739 #endif
1740         .add_interface = iwlagn_mac_add_interface,
1741         .remove_interface = iwlagn_mac_remove_interface,
1742         .change_interface = iwlagn_mac_change_interface,
1743         .config = iwlagn_mac_config,
1744         .configure_filter = iwlagn_configure_filter,
1745         .set_key = iwlagn_mac_set_key,
1746         .update_tkip_key = iwlagn_mac_update_tkip_key,
1747         .set_rekey_data = iwlagn_mac_set_rekey_data,
1748         .conf_tx = iwlagn_mac_conf_tx,
1749         .bss_info_changed = iwlagn_bss_info_changed,
1750         .ampdu_action = iwlagn_mac_ampdu_action,
1751         .hw_scan = iwlagn_mac_hw_scan,
1752         .sta_notify = iwlagn_mac_sta_notify,
1753         .sta_state = iwlagn_mac_sta_state,
1754         .channel_switch = iwlagn_mac_channel_switch,
1755         .flush = iwlagn_mac_flush,
1756         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1757         .remain_on_channel = iwlagn_mac_remain_on_channel,
1758         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1759         .rssi_callback = iwlagn_mac_rssi_callback,
1760         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1761         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1762         .set_tim = iwlagn_mac_set_tim,
1763 };
1764
1765 /* This function both allocates and initializes hw and priv. */
1766 struct ieee80211_hw *iwl_alloc_all(void)
1767 {
1768         struct iwl_priv *priv;
1769         struct iwl_op_mode *op_mode;
1770         /* mac80211 allocates memory for this device instance, including
1771          *   space for this driver's private structure */
1772         struct ieee80211_hw *hw;
1773
1774         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1775                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1776         if (!hw)
1777                 goto out;
1778
1779         op_mode = hw->priv;
1780         priv = IWL_OP_MODE_GET_DVM(op_mode);
1781         priv->hw = hw;
1782
1783 out:
1784         return hw;
1785 }