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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/slab.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/sched.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/if_arp.h>
  39
  40 #include <net/ieee80211_radiotap.h>
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-io.h"
  46 #include "iwl-trans.h"
  47 #include "iwl-op-mode.h"
  48 #include "iwl-modparams.h"
  49
  50 #include "dev.h"
  51 #include "calib.h"
  52 #include "agn.h"
  53
  54 /*****************************************************************************
  55  *
  56  * mac80211 entry point functions
  57  *
  58  *****************************************************************************/
  59
  60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  61         {
  62                 .max = 1,
  63                 .types = BIT(NL80211_IFTYPE_STATION),
  64         },
  65         {
  66                 .max = 1,
  67                 .types = BIT(NL80211_IFTYPE_AP),
  68         },
  69 };
  70
  71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  72         {
  73                 .max = 2,
  74                 .types = BIT(NL80211_IFTYPE_STATION),
  75         },
  76 };
  77
  78 static const struct ieee80211_iface_combination
  79 iwlagn_iface_combinations_dualmode[] = {
  80         { .num_different_channels = 1,
  81           .max_interfaces = 2,
  82           .beacon_int_infra_match = true,
  83           .limits = iwlagn_sta_ap_limits,
  84           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  85         },
  86         { .num_different_channels = 1,
  87           .max_interfaces = 2,
  88           .limits = iwlagn_2sta_limits,
  89           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  90         },
  91 };
  92
  93 /*
  94  * Not a mac80211 entry point function, but it fits in with all the
  95  * other mac80211 functions grouped here.
  96  */
  97 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  98                               const struct iwl_ucode_capabilities *capa)
  99 {
 100         int ret;
 101         struct ieee80211_hw *hw = priv->hw;
 102         struct iwl_rxon_context *ctx;
 103
 104         hw->rate_control_algorithm = "iwl-agn-rs";
 105
 106         /* Tell mac80211 our characteristics */
 107         ieee80211_hw_set(hw, SIGNAL_DBM);
 108         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 109         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
 110         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 111         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 112         ieee80211_hw_set(hw, QUEUE_CONTROL);
 113         ieee80211_hw_set(hw, SUPPORTS_PS);
 114         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 115         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 116         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 117
 118         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 119         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 120
 121         /*
 122          * Including the following line will crash some AP's.  This
 123          * workaround removes the stimulus which causes the crash until
 124          * the AP software can be fixed.
 125         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 126          */
 127
 128         if (priv->nvm_data->sku_cap_11n_enable)
 129                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 130                                        NL80211_FEATURE_STATIC_SMPS;
 131
 132         /*
 133          * Enable 11w if advertised by firmware and software crypto
 134          * is not enabled (as the firmware will interpret some mgmt
 135          * packets, so enabling it with software crypto isn't safe)
 136          */
 137         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 138             !iwlwifi_mod_params.sw_crypto)
 139                 ieee80211_hw_set(hw, MFP_CAPABLE);
 140
 141         hw->sta_data_size = sizeof(struct iwl_station_priv);
 142         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 143
 144         for_each_context(priv, ctx) {
 145                 hw->wiphy->interface_modes |= ctx->interface_modes;
 146                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 147         }
 148
 149         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 150
 151         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 152                 hw->wiphy->iface_combinations =
 153                         iwlagn_iface_combinations_dualmode;
 154                 hw->wiphy->n_iface_combinations =
 155                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 156         }
 157
 158         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 159         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 160                                        REGULATORY_DISABLE_BEACON_HINTS;
 161
 162 #ifdef CONFIG_PM_SLEEP
 163         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 164             priv->trans->ops->d3_suspend &&
 165             priv->trans->ops->d3_resume &&
 166             device_can_wakeup(priv->trans->dev)) {
 167                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 168                                              WIPHY_WOWLAN_DISCONNECT |
 169                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 170                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 171                 if (!iwlwifi_mod_params.sw_crypto)
 172                         priv->wowlan_support.flags |=
 173                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 174                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 175
 176                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 177                 priv->wowlan_support.pattern_min_len =
 178                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 179                 priv->wowlan_support.pattern_max_len =
 180                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 181                 hw->wiphy->wowlan = &priv->wowlan_support;
 182         }
 183 #endif
 184
 185         if (iwlwifi_mod_params.power_save)
 186                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 187         else
 188                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 189
 190         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 191         /* we create the 802.11 header and a max-length SSID element */
 192         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 193
 194         /*
 195          * We don't use all queues: 4 and 9 are unused and any
 196          * aggregation queue gets mapped down to the AC queue.
 197          */
 198         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 199
 200         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 201
 202         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 203                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 204                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 205         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 206                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 207                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 208
 209         hw->wiphy->hw_version = priv->trans->hw_id;
 210
 211         iwl_leds_init(priv);
 212
 213         ret = ieee80211_register_hw(priv->hw);
 214         if (ret) {
 215                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 216                 iwl_leds_exit(priv);
 217                 return ret;
 218         }
 219         priv->mac80211_registered = 1;
 220
 221         return 0;
 222 }
 223
 224 void iwlagn_mac_unregister(struct iwl_priv *priv)
 225 {
 226         if (!priv->mac80211_registered)
 227                 return;
 228         iwl_leds_exit(priv);
 229         ieee80211_unregister_hw(priv->hw);
 230         priv->mac80211_registered = 0;
 231 }
 232
 233 static int __iwl_up(struct iwl_priv *priv)
 234 {
 235         struct iwl_rxon_context *ctx;
 236         int ret;
 237
 238         lockdep_assert_held(&priv->mutex);
 239
 240         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 241                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 242                 return -EIO;
 243         }
 244
 245         for_each_context(priv, ctx) {
 246                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 247                 if (ret) {
 248                         iwl_dealloc_bcast_stations(priv);
 249                         return ret;
 250                 }
 251         }
 252
 253         ret = iwl_trans_start_hw(priv->trans);
 254         if (ret) {
 255                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 256                 goto error;
 257         }
 258
 259         ret = iwl_run_init_ucode(priv);
 260         if (ret) {
 261                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 262                 goto error;
 263         }
 264
 265         ret = iwl_trans_start_hw(priv->trans);
 266         if (ret) {
 267                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 268                 goto error;
 269         }
 270
 271         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 272         if (ret) {
 273                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 274                 goto error;
 275         }
 276
 277         ret = iwl_alive_start(priv);
 278         if (ret)
 279                 goto error;
 280         return 0;
 281
 282  error:
 283         set_bit(STATUS_EXIT_PENDING, &priv->status);
 284         iwl_down(priv);
 285         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 286
 287         IWL_ERR(priv, "Unable to initialize device.\n");
 288         return ret;
 289 }
 290
 291 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 292 {
 293         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 294         int ret;
 295
 296         IWL_DEBUG_MAC80211(priv, "enter\n");
 297
 298         /* we should be verifying the device is ready to be opened */
 299         mutex_lock(&priv->mutex);
 300         ret = __iwl_up(priv);
 301         mutex_unlock(&priv->mutex);
 302         if (ret)
 303                 return ret;
 304
 305         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 306
 307         /* Now we should be done, and the READY bit should be set. */
 308         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 309                 ret = -EIO;
 310
 311         iwlagn_led_enable(priv);
 312
 313         priv->is_open = 1;
 314         IWL_DEBUG_MAC80211(priv, "leave\n");
 315         return 0;
 316 }
 317
 318 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 319 {
 320         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 321
 322         IWL_DEBUG_MAC80211(priv, "enter\n");
 323
 324         if (!priv->is_open)
 325                 return;
 326
 327         priv->is_open = 0;
 328
 329         mutex_lock(&priv->mutex);
 330         iwl_down(priv);
 331         mutex_unlock(&priv->mutex);
 332
 333         iwl_cancel_deferred_work(priv);
 334
 335         flush_workqueue(priv->workqueue);
 336
 337         IWL_DEBUG_MAC80211(priv, "leave\n");
 338 }
 339
 340 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 341                                       struct ieee80211_vif *vif,
 342                                       struct cfg80211_gtk_rekey_data *data)
 343 {
 344         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 345
 346         if (iwlwifi_mod_params.sw_crypto)
 347                 return;
 348
 349         IWL_DEBUG_MAC80211(priv, "enter\n");
 350         mutex_lock(&priv->mutex);
 351
 352         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 353                 goto out;
 354
 355         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 356         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 357         priv->replay_ctr =
 358                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 359         priv->have_rekey_data = true;
 360
 361  out:
 362         mutex_unlock(&priv->mutex);
 363         IWL_DEBUG_MAC80211(priv, "leave\n");
 364 }
 365
 366 #ifdef CONFIG_PM_SLEEP
 367
 368 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 369                               struct cfg80211_wowlan *wowlan)
 370 {
 371         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 372         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 373         int ret;
 374
 375         if (WARN_ON(!wowlan))
 376                 return -EINVAL;
 377
 378         IWL_DEBUG_MAC80211(priv, "enter\n");
 379         mutex_lock(&priv->mutex);
 380
 381         /* Don't attempt WoWLAN when not associated, tear down instead. */
 382         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 383             !iwl_is_associated_ctx(ctx)) {
 384                 ret = 1;
 385                 goto out;
 386         }
 387
 388         ret = iwlagn_suspend(priv, wowlan);
 389         if (ret)
 390                 goto error;
 391
 392         /* let the ucode operate on its own */
 393         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 394                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 395
 396         iwl_trans_d3_suspend(priv->trans, false);
 397
 398         goto out;
 399
 400  error:
 401         priv->wowlan = false;
 402         iwlagn_prepare_restart(priv);
 403         ieee80211_restart_hw(priv->hw);
 404  out:
 405         mutex_unlock(&priv->mutex);
 406         IWL_DEBUG_MAC80211(priv, "leave\n");
 407
 408         return ret;
 409 }
 410
 411 struct iwl_resume_data {
 412         struct iwl_priv *priv;
 413         struct iwlagn_wowlan_status *cmd;
 414         bool valid;
 415 };
 416
 417 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 418                                  struct iwl_rx_packet *pkt, void *data)
 419 {
 420         struct iwl_resume_data *resume_data = data;
 421         struct iwl_priv *priv = resume_data->priv;
 422
 423         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 424                 IWL_ERR(priv, "rx wrong size data\n");
 425                 return true;
 426         }
 427         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 428         resume_data->valid = true;
 429
 430         return true;
 431 }
 432
 433 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 434 {
 435         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 436         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 437         struct ieee80211_vif *vif;
 438         u32 base;
 439         int ret;
 440         enum iwl_d3_status d3_status;
 441         struct error_table_start {
 442                 /* cf. struct iwl_error_event_table */
 443                 u32 valid;
 444                 u32 error_id;
 445         } err_info;
 446         struct iwl_notification_wait status_wait;
 447         static const u16 status_cmd[] = {
 448                 REPLY_WOWLAN_GET_STATUS,
 449         };
 450         struct iwlagn_wowlan_status status_data = {};
 451         struct iwl_resume_data resume_data = {
 452                 .priv = priv,
 453                 .cmd = &status_data,
 454                 .valid = false,
 455         };
 456         struct cfg80211_wowlan_wakeup wakeup = {
 457                 .pattern_idx = -1,
 458         };
 459 #ifdef CONFIG_IWLWIFI_DEBUGFS
 460         const struct fw_img *img;
 461 #endif
 462
 463         IWL_DEBUG_MAC80211(priv, "enter\n");
 464         mutex_lock(&priv->mutex);
 465
 466         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 467         vif = ctx->vif;
 468
 469         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
 470         if (ret)
 471                 goto out_unlock;
 472
 473         if (d3_status != IWL_D3_STATUS_ALIVE) {
 474                 IWL_INFO(priv, "Device was reset during suspend\n");
 475                 goto out_unlock;
 476         }
 477
 478         /* uCode is no longer operating by itself */
 479         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 480                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 481
 482         base = priv->device_pointers.error_event_table;
 483         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 484                 IWL_WARN(priv, "Invalid error table during resume!\n");
 485                 goto out_unlock;
 486         }
 487
 488         iwl_trans_read_mem_bytes(priv->trans, base,
 489                                  &err_info, sizeof(err_info));
 490
 491         if (err_info.valid) {
 492                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 493                          err_info.valid, err_info.error_id);
 494                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 495                         wakeup.rfkill_release = true;
 496                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 497                                                        GFP_KERNEL);
 498                 }
 499                 goto out_unlock;
 500         }
 501
 502 #ifdef CONFIG_IWLWIFI_DEBUGFS
 503         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 504         if (!priv->wowlan_sram)
 505                 priv->wowlan_sram =
 506                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 507                                 GFP_KERNEL);
 508
 509         if (priv->wowlan_sram)
 510                 iwl_trans_read_mem(priv->trans, 0x800000,
 511                                    priv->wowlan_sram,
 512                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 513 #endif
 514
 515         /*
 516          * This is very strange. The GET_STATUS command is sent but the device
 517          * doesn't reply properly, it seems it doesn't close the RBD so one is
 518          * always left open ... As a result, we need to send another command
 519          * and have to reset the driver afterwards. As we need to switch to
 520          * runtime firmware again that'll happen.
 521          */
 522
 523         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 524                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 525                                    &resume_data);
 526
 527         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 528         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 529         /* an RBD is left open in the firmware now! */
 530
 531         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 532         if (ret)
 533                 goto out_unlock;
 534
 535         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 536                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 537                 struct cfg80211_wowlan_wakeup *wakeup_report;
 538
 539                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 540
 541                 if (reasons) {
 542                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 543                                 wakeup.magic_pkt = true;
 544                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 545                                 wakeup.pattern_idx = status_data.pattern_number;
 546                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 547                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 548                                 wakeup.disconnect = true;
 549                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 550                                 wakeup.gtk_rekey_failure = true;
 551                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 552                                 wakeup.eap_identity_req = true;
 553                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 554                                 wakeup.four_way_handshake = true;
 555                         wakeup_report = &wakeup;
 556                 } else {
 557                         wakeup_report = NULL;
 558                 }
 559
 560                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 561         }
 562
 563         priv->wowlan = false;
 564
 565         iwlagn_prepare_restart(priv);
 566
 567         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 568         iwl_connection_init_rx_config(priv, ctx);
 569         iwlagn_set_rxon_chain(priv, ctx);
 570
 571  out_unlock:
 572         mutex_unlock(&priv->mutex);
 573         IWL_DEBUG_MAC80211(priv, "leave\n");
 574
 575         ieee80211_resume_disconnect(vif);
 576
 577         return 1;
 578 }
 579
 580 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 581 {
 582         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 583
 584         device_set_wakeup_enable(priv->trans->dev, enabled);
 585 }
 586 #endif
 587
 588 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 589                           struct ieee80211_tx_control *control,
 590                           struct sk_buff *skb)
 591 {
 592         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 593
 594         if (iwlagn_tx_skb(priv, control->sta, skb))
 595                 ieee80211_free_txskb(hw, skb);
 596 }
 597
 598 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 599                                        struct ieee80211_vif *vif,
 600                                        struct ieee80211_key_conf *keyconf,
 601                                        struct ieee80211_sta *sta,
 602                                        u32 iv32, u16 *phase1key)
 603 {
 604         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 605
 606         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 607 }
 608
 609 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 610                               struct ieee80211_vif *vif,
 611                               struct ieee80211_sta *sta,
 612                               struct ieee80211_key_conf *key)
 613 {
 614         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 615         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 616         struct iwl_rxon_context *ctx = vif_priv->ctx;
 617         int ret;
 618         bool is_default_wep_key = false;
 619
 620         IWL_DEBUG_MAC80211(priv, "enter\n");
 621
 622         if (iwlwifi_mod_params.sw_crypto) {
 623                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 624                 return -EOPNOTSUPP;
 625         }
 626
 627         switch (key->cipher) {
 628         case WLAN_CIPHER_SUITE_TKIP:
 629                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 630                 /* fall through */
 631         case WLAN_CIPHER_SUITE_CCMP:
 632                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 633                 break;
 634         default:
 635                 break;
 636         }
 637
 638         /*
 639          * We could program these keys into the hardware as well, but we
 640          * don't expect much multicast traffic in IBSS and having keys
 641          * for more stations is probably more useful.
 642          *
 643          * Mark key TX-only and return 0.
 644          */
 645         if (vif->type == NL80211_IFTYPE_ADHOC &&
 646             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 647                 key->hw_key_idx = WEP_INVALID_OFFSET;
 648                 return 0;
 649         }
 650
 651         /* If they key was TX-only, accept deletion */
 652         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 653                 return 0;
 654
 655         mutex_lock(&priv->mutex);
 656         iwl_scan_cancel_timeout(priv, 100);
 657
 658         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 659
 660         /*
 661          * If we are getting WEP group key and we didn't receive any key mapping
 662          * so far, we are in legacy wep mode (group key only), otherwise we are
 663          * in 1X mode.
 664          * In legacy wep mode, we use another host command to the uCode.
 665          */
 666         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 667              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 668                 if (cmd == SET_KEY)
 669                         is_default_wep_key = !ctx->key_mapping_keys;
 670                 else
 671                         is_default_wep_key =
 672                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 673         }
 674
 675
 676         switch (cmd) {
 677         case SET_KEY:
 678                 if (is_default_wep_key) {
 679                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 680                         break;
 681                 }
 682                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 683                 if (ret) {
 684                         /*
 685                          * can't add key for RX, but we don't need it
 686                          * in the device for TX so still return 0
 687                          */
 688                         ret = 0;
 689                         key->hw_key_idx = WEP_INVALID_OFFSET;
 690                 }
 691
 692                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 693                 break;
 694         case DISABLE_KEY:
 695                 if (is_default_wep_key)
 696                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 697                 else
 698                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 699
 700                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 701                 break;
 702         default:
 703                 ret = -EINVAL;
 704         }
 705
 706         mutex_unlock(&priv->mutex);
 707         IWL_DEBUG_MAC80211(priv, "leave\n");
 708
 709         return ret;
 710 }
 711
 712 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 713 {
 714         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 715                 return false;
 716         return true;
 717 }
 718
 719 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 720 {
 721         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 722                 return false;
 723         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 724                 return true;
 725
 726         /* disabled by default */
 727         return false;
 728 }
 729
 730 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 731                                    struct ieee80211_vif *vif,
 732                                    enum ieee80211_ampdu_mlme_action action,
 733                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 734                                    u8 buf_size, bool amsdu)
 735 {
 736         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 737         int ret = -EINVAL;
 738         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 739
 740         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 741                      sta->addr, tid);
 742
 743         if (!(priv->nvm_data->sku_cap_11n_enable))
 744                 return -EACCES;
 745
 746         IWL_DEBUG_MAC80211(priv, "enter\n");
 747         mutex_lock(&priv->mutex);
 748
 749         switch (action) {
 750         case IEEE80211_AMPDU_RX_START:
 751                 if (!iwl_enable_rx_ampdu(priv->cfg))
 752                         break;
 753                 IWL_DEBUG_HT(priv, "start Rx\n");
 754                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 755                 break;
 756         case IEEE80211_AMPDU_RX_STOP:
 757                 IWL_DEBUG_HT(priv, "stop Rx\n");
 758                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 759                 break;
 760         case IEEE80211_AMPDU_TX_START:
 761                 if (!priv->trans->ops->txq_enable)
 762                         break;
 763                 if (!iwl_enable_tx_ampdu(priv->cfg))
 764                         break;
 765                 IWL_DEBUG_HT(priv, "start Tx\n");
 766                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 767                 break;
 768         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 769         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 770                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 771                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 772                 break;
 773         case IEEE80211_AMPDU_TX_STOP_CONT:
 774                 IWL_DEBUG_HT(priv, "stop Tx\n");
 775                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 776                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 777                         priv->agg_tids_count--;
 778                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 779                                      priv->agg_tids_count);
 780                 }
 781                 if (!priv->agg_tids_count &&
 782                     priv->hw_params.use_rts_for_aggregation) {
 783                         /*
 784                          * switch off RTS/CTS if it was previously enabled
 785                          */
 786                         sta_priv->lq_sta.lq.general_params.flags &=
 787                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 788                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 789                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 790                 }
 791                 break;
 792         case IEEE80211_AMPDU_TX_OPERATIONAL:
 793                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 794                 break;
 795         }
 796         mutex_unlock(&priv->mutex);
 797         IWL_DEBUG_MAC80211(priv, "leave\n");
 798         return ret;
 799 }
 800
 801 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 802                               struct ieee80211_vif *vif,
 803                               struct ieee80211_sta *sta)
 804 {
 805         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 806         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 807         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 808         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 809         int ret;
 810         u8 sta_id;
 811
 812         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 813                         sta->addr);
 814         sta_priv->sta_id = IWL_INVALID_STATION;
 815
 816         atomic_set(&sta_priv->pending_frames, 0);
 817         if (vif->type == NL80211_IFTYPE_AP)
 818                 sta_priv->client = true;
 819
 820         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 821                                      is_ap, sta, &sta_id);
 822         if (ret) {
 823                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 824                         sta->addr, ret);
 825                 /* Should we return success if return code is EEXIST ? */
 826                 return ret;
 827         }
 828
 829         sta_priv->sta_id = sta_id;
 830
 831         return 0;
 832 }
 833
 834 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 835                                  struct ieee80211_vif *vif,
 836                                  struct ieee80211_sta *sta)
 837 {
 838         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 839         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 840         int ret;
 841
 842         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 843
 844         if (vif->type == NL80211_IFTYPE_STATION) {
 845                 /*
 846                  * Station will be removed from device when the RXON
 847                  * is set to unassociated -- just deactivate it here
 848                  * to avoid re-programming it.
 849                  */
 850                 ret = 0;
 851                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 852         } else {
 853                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 854                 if (ret)
 855                         IWL_DEBUG_QUIET_RFKILL(priv,
 856                                 "Error removing station %pM\n", sta->addr);
 857         }
 858         return ret;
 859 }
 860
 861 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 862                                 struct ieee80211_vif *vif,
 863                                 struct ieee80211_sta *sta,
 864                                 enum ieee80211_sta_state old_state,
 865                                 enum ieee80211_sta_state new_state)
 866 {
 867         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 868         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 869         enum {
 870                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 871         } op = NONE;
 872         int ret;
 873
 874         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 875                            sta->addr, old_state, new_state);
 876
 877         mutex_lock(&priv->mutex);
 878         if (vif->type == NL80211_IFTYPE_STATION) {
 879                 if (old_state == IEEE80211_STA_NOTEXIST &&
 880                     new_state == IEEE80211_STA_NONE)
 881                         op = ADD;
 882                 else if (old_state == IEEE80211_STA_NONE &&
 883                          new_state == IEEE80211_STA_NOTEXIST)
 884                         op = REMOVE;
 885                 else if (old_state == IEEE80211_STA_AUTH &&
 886                          new_state == IEEE80211_STA_ASSOC)
 887                         op = HT_RATE_INIT;
 888         } else {
 889                 if (old_state == IEEE80211_STA_AUTH &&
 890                     new_state == IEEE80211_STA_ASSOC)
 891                         op = ADD_RATE_INIT;
 892                 else if (old_state == IEEE80211_STA_ASSOC &&
 893                          new_state == IEEE80211_STA_AUTH)
 894                         op = REMOVE;
 895         }
 896
 897         switch (op) {
 898         case ADD:
 899                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 900                 if (ret)
 901                         break;
 902                 /*
 903                  * Clear the in-progress flag, the AP station entry was added
 904                  * but we'll initialize LQ only when we've associated (which
 905                  * would also clear the in-progress flag). This is necessary
 906                  * in case we never initialize LQ because association fails.
 907                  */
 908                 spin_lock_bh(&priv->sta_lock);
 909                 priv->stations[iwl_sta_id(sta)].used &=
 910                         ~IWL_STA_UCODE_INPROGRESS;
 911                 spin_unlock_bh(&priv->sta_lock);
 912                 break;
 913         case REMOVE:
 914                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 915                 break;
 916         case ADD_RATE_INIT:
 917                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 918                 if (ret)
 919                         break;
 920                 /* Initialize rate scaling */
 921                 IWL_DEBUG_INFO(priv,
 922                                "Initializing rate scaling for station %pM\n",
 923                                sta->addr);
 924                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 925                 ret = 0;
 926                 break;
 927         case HT_RATE_INIT:
 928                 /* Initialize rate scaling */
 929                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 930                 if (ret)
 931                         break;
 932                 IWL_DEBUG_INFO(priv,
 933                                "Initializing rate scaling for station %pM\n",
 934                                sta->addr);
 935                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 936                 ret = 0;
 937                 break;
 938         default:
 939                 ret = 0;
 940                 break;
 941         }
 942
 943         /*
 944          * mac80211 might WARN if we fail, but due the way we
 945          * (badly) handle hard rfkill, we might fail here
 946          */
 947         if (iwl_is_rfkill(priv))
 948                 ret = 0;
 949
 950         mutex_unlock(&priv->mutex);
 951         IWL_DEBUG_MAC80211(priv, "leave\n");
 952
 953         return ret;
 954 }
 955
 956 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 957                                       struct ieee80211_vif *vif,
 958                                       struct ieee80211_channel_switch *ch_switch)
 959 {
 960         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 961         struct ieee80211_conf *conf = &hw->conf;
 962         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 963         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 964         /*
 965          * MULTI-FIXME
 966          * When we add support for multiple interfaces, we need to
 967          * revisit this. The channel switch command in the device
 968          * only affects the BSS context, but what does that really
 969          * mean? And what if we get a CSA on the second interface?
 970          * This needs a lot of work.
 971          */
 972         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 973         u16 ch;
 974
 975         IWL_DEBUG_MAC80211(priv, "enter\n");
 976
 977         mutex_lock(&priv->mutex);
 978
 979         if (iwl_is_rfkill(priv))
 980                 goto out;
 981
 982         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 983             test_bit(STATUS_SCANNING, &priv->status) ||
 984             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 985                 goto out;
 986
 987         if (!iwl_is_associated_ctx(ctx))
 988                 goto out;
 989
 990         if (!priv->lib->set_channel_switch)
 991                 goto out;
 992
 993         ch = channel->hw_value;
 994         if (le16_to_cpu(ctx->active.channel) == ch)
 995                 goto out;
 996
 997         priv->current_ht_config.smps = conf->smps_mode;
 998
 999         /* Configure HT40 channels */
1000         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1001         case NL80211_CHAN_NO_HT:
1002         case NL80211_CHAN_HT20:
1003                 ctx->ht.is_40mhz = false;
1004                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1005                 break;
1006         case NL80211_CHAN_HT40MINUS:
1007                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1008                 ctx->ht.is_40mhz = true;
1009                 break;
1010         case NL80211_CHAN_HT40PLUS:
1011                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1012                 ctx->ht.is_40mhz = true;
1013                 break;
1014         }
1015
1016         if ((le16_to_cpu(ctx->staging.channel) != ch))
1017                 ctx->staging.flags = 0;
1018
1019         iwl_set_rxon_channel(priv, channel, ctx);
1020         iwl_set_rxon_ht(priv, ht_conf);
1021         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1022
1023         /*
1024          * at this point, staging_rxon has the
1025          * configuration for channel switch
1026          */
1027         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1028         priv->switch_channel = cpu_to_le16(ch);
1029         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1030                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1031                 priv->switch_channel = 0;
1032                 ieee80211_chswitch_done(ctx->vif, false);
1033         }
1034
1035 out:
1036         mutex_unlock(&priv->mutex);
1037         IWL_DEBUG_MAC80211(priv, "leave\n");
1038 }
1039
1040 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1041 {
1042         /*
1043          * MULTI-FIXME
1044          * See iwlagn_mac_channel_switch.
1045          */
1046         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1047
1048         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1049                 return;
1050
1051         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1052                 return;
1053
1054         if (ctx->vif)
1055                 ieee80211_chswitch_done(ctx->vif, is_success);
1056 }
1057
1058 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1059                                     unsigned int changed_flags,
1060                                     unsigned int *total_flags,
1061                                     u64 multicast)
1062 {
1063         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1064         __le32 filter_or = 0, filter_nand = 0;
1065         struct iwl_rxon_context *ctx;
1066
1067 #define CHK(test, flag) do { \
1068         if (*total_flags & (test))              \
1069                 filter_or |= (flag);            \
1070         else                                    \
1071                 filter_nand |= (flag);          \
1072         } while (0)
1073
1074         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1075                         changed_flags, *total_flags);
1076
1077         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1078         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1079         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1080         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1081
1082 #undef CHK
1083
1084         mutex_lock(&priv->mutex);
1085
1086         for_each_context(priv, ctx) {
1087                 ctx->staging.filter_flags &= ~filter_nand;
1088                 ctx->staging.filter_flags |= filter_or;
1089
1090                 /*
1091                  * Not committing directly because hardware can perform a scan,
1092                  * but we'll eventually commit the filter flags change anyway.
1093                  */
1094         }
1095
1096         mutex_unlock(&priv->mutex);
1097
1098         /*
1099          * Receiving all multicast frames is always enabled by the
1100          * default flags setup in iwl_connection_init_rx_config()
1101          * since we currently do not support programming multicast
1102          * filters into the device.
1103          */
1104         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1105                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1106 }
1107
1108 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1109                              u32 queues, bool drop)
1110 {
1111         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1112         u32 scd_queues;
1113
1114         mutex_lock(&priv->mutex);
1115         IWL_DEBUG_MAC80211(priv, "enter\n");
1116
1117         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1118                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1119                 goto done;
1120         }
1121         if (iwl_is_rfkill(priv)) {
1122                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1123                 goto done;
1124         }
1125
1126         scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1127         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1128                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1129
1130         if (drop) {
1131                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1132                                     scd_queues);
1133                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1134                         IWL_ERR(priv, "flush request fail\n");
1135                         goto done;
1136                 }
1137         }
1138
1139         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1140         iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
1141 done:
1142         mutex_unlock(&priv->mutex);
1143         IWL_DEBUG_MAC80211(priv, "leave\n");
1144 }
1145
1146 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1147                                       struct ieee80211_vif *vif,
1148                                       const struct ieee80211_event *event)
1149 {
1150         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1151
1152         if (event->type != RSSI_EVENT)
1153                 return;
1154
1155         IWL_DEBUG_MAC80211(priv, "enter\n");
1156
1157         if (priv->lib->bt_params &&
1158             priv->lib->bt_params->advanced_bt_coexist) {
1159                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1160                         priv->bt_enable_pspoll = true;
1161                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1162                         priv->bt_enable_pspoll = false;
1163
1164                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1165         } else {
1166                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1167                                 "ignoring RSSI callback\n");
1168         }
1169
1170         IWL_DEBUG_MAC80211(priv, "leave\n");
1171 }
1172
1173 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1174                               struct ieee80211_sta *sta, bool set)
1175 {
1176         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1177
1178         queue_work(priv->workqueue, &priv->beacon_update);
1179
1180         return 0;
1181 }
1182
1183 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1184                               struct ieee80211_vif *vif, u16 queue,
1185                               const struct ieee80211_tx_queue_params *params)
1186 {
1187         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1188         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1189         struct iwl_rxon_context *ctx = vif_priv->ctx;
1190         int q;
1191
1192         if (WARN_ON(!ctx))
1193                 return -EINVAL;
1194
1195         IWL_DEBUG_MAC80211(priv, "enter\n");
1196
1197         if (!iwl_is_ready_rf(priv)) {
1198                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1199                 return -EIO;
1200         }
1201
1202         if (queue >= AC_NUM) {
1203                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1204                 return 0;
1205         }
1206
1207         q = AC_NUM - 1 - queue;
1208
1209         mutex_lock(&priv->mutex);
1210
1211         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1212                 cpu_to_le16(params->cw_min);
1213         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1214                 cpu_to_le16(params->cw_max);
1215         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1216         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1217                         cpu_to_le16((params->txop * 32));
1218
1219         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1220
1221         mutex_unlock(&priv->mutex);
1222
1223         IWL_DEBUG_MAC80211(priv, "leave\n");
1224         return 0;
1225 }
1226
1227 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1228 {
1229         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1230
1231         return priv->ibss_manager == IWL_IBSS_MANAGER;
1232 }
1233
1234 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1235 {
1236         iwl_connection_init_rx_config(priv, ctx);
1237
1238         iwlagn_set_rxon_chain(priv, ctx);
1239
1240         return iwlagn_commit_rxon(priv, ctx);
1241 }
1242
1243 static int iwl_setup_interface(struct iwl_priv *priv,
1244                                struct iwl_rxon_context *ctx)
1245 {
1246         struct ieee80211_vif *vif = ctx->vif;
1247         int err, ac;
1248
1249         lockdep_assert_held(&priv->mutex);
1250
1251         /*
1252          * This variable will be correct only when there's just
1253          * a single context, but all code using it is for hardware
1254          * that supports only one context.
1255          */
1256         priv->iw_mode = vif->type;
1257
1258         ctx->is_active = true;
1259
1260         err = iwl_set_mode(priv, ctx);
1261         if (err) {
1262                 if (!ctx->always_active)
1263                         ctx->is_active = false;
1264                 return err;
1265         }
1266
1267         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1268             vif->type == NL80211_IFTYPE_ADHOC) {
1269                 /*
1270                  * pretend to have high BT traffic as long as we
1271                  * are operating in IBSS mode, as this will cause
1272                  * the rate scaling etc. to behave as intended.
1273                  */
1274                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1275         }
1276
1277         /* set up queue mappings */
1278         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1279                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1280
1281         if (vif->type == NL80211_IFTYPE_AP)
1282                 vif->cab_queue = ctx->mcast_queue;
1283         else
1284                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1285
1286         return 0;
1287 }
1288
1289 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1290                                     struct ieee80211_vif *vif)
1291 {
1292         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1293         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1294         struct iwl_rxon_context *tmp, *ctx = NULL;
1295         int err;
1296         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1297         bool reset = false;
1298
1299         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1300                            viftype, vif->addr);
1301
1302         mutex_lock(&priv->mutex);
1303
1304         if (!iwl_is_ready_rf(priv)) {
1305                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1306                 err = -EINVAL;
1307                 goto out;
1308         }
1309
1310         for_each_context(priv, tmp) {
1311                 u32 possible_modes =
1312                         tmp->interface_modes | tmp->exclusive_interface_modes;
1313
1314                 if (tmp->vif) {
1315                         /* On reset we need to add the same interface again */
1316                         if (tmp->vif == vif) {
1317                                 reset = true;
1318                                 ctx = tmp;
1319                                 break;
1320                         }
1321
1322                         /* check if this busy context is exclusive */
1323                         if (tmp->exclusive_interface_modes &
1324                                                 BIT(tmp->vif->type)) {
1325                                 err = -EINVAL;
1326                                 goto out;
1327                         }
1328                         continue;
1329                 }
1330
1331                 if (!(possible_modes & BIT(viftype)))
1332                         continue;
1333
1334                 /* have maybe usable context w/o interface */
1335                 ctx = tmp;
1336                 break;
1337         }
1338
1339         if (!ctx) {
1340                 err = -EOPNOTSUPP;
1341                 goto out;
1342         }
1343
1344         vif_priv->ctx = ctx;
1345         ctx->vif = vif;
1346
1347         /*
1348          * In SNIFFER device type, the firmware reports the FCS to
1349          * the host, rather than snipping it off. Unfortunately,
1350          * mac80211 doesn't (yet) provide a per-packet flag for
1351          * this, so that we have to set the hardware flag based
1352          * on the interfaces added. As the monitor interface can
1353          * only be present by itself, and will be removed before
1354          * other interfaces are added, this is safe.
1355          */
1356         if (vif->type == NL80211_IFTYPE_MONITOR)
1357                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1358         else
1359                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1360
1361         err = iwl_setup_interface(priv, ctx);
1362         if (!err || reset)
1363                 goto out;
1364
1365         ctx->vif = NULL;
1366         priv->iw_mode = NL80211_IFTYPE_STATION;
1367  out:
1368         mutex_unlock(&priv->mutex);
1369
1370         IWL_DEBUG_MAC80211(priv, "leave\n");
1371         return err;
1372 }
1373
1374 static void iwl_teardown_interface(struct iwl_priv *priv,
1375                                    struct ieee80211_vif *vif,
1376                                    bool mode_change)
1377 {
1378         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1379
1380         lockdep_assert_held(&priv->mutex);
1381
1382         if (priv->scan_vif == vif) {
1383                 iwl_scan_cancel_timeout(priv, 200);
1384                 iwl_force_scan_end(priv);
1385         }
1386
1387         if (!mode_change) {
1388                 iwl_set_mode(priv, ctx);
1389                 if (!ctx->always_active)
1390                         ctx->is_active = false;
1391         }
1392
1393         /*
1394          * When removing the IBSS interface, overwrite the
1395          * BT traffic load with the stored one from the last
1396          * notification, if any. If this is a device that
1397          * doesn't implement this, this has no effect since
1398          * both values are the same and zero.
1399          */
1400         if (vif->type == NL80211_IFTYPE_ADHOC)
1401                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1402 }
1403
1404 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1405                               struct ieee80211_vif *vif)
1406 {
1407         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1408         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1409
1410         IWL_DEBUG_MAC80211(priv, "enter\n");
1411
1412         mutex_lock(&priv->mutex);
1413
1414         if (WARN_ON(ctx->vif != vif)) {
1415                 struct iwl_rxon_context *tmp;
1416                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1417                 for_each_context(priv, tmp)
1418                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1419                                 tmp->ctxid, tmp, tmp->vif);
1420         }
1421         ctx->vif = NULL;
1422
1423         iwl_teardown_interface(priv, vif, false);
1424
1425         mutex_unlock(&priv->mutex);
1426
1427         IWL_DEBUG_MAC80211(priv, "leave\n");
1428
1429 }
1430
1431 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1432                                        struct ieee80211_vif *vif,
1433                                        enum nl80211_iftype newtype, bool newp2p)
1434 {
1435         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1436         struct iwl_rxon_context *ctx, *tmp;
1437         enum nl80211_iftype newviftype = newtype;
1438         u32 interface_modes;
1439         int err;
1440
1441         IWL_DEBUG_MAC80211(priv, "enter\n");
1442
1443         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1444
1445         mutex_lock(&priv->mutex);
1446
1447         ctx = iwl_rxon_ctx_from_vif(vif);
1448
1449         /*
1450          * To simplify this code, only support changes on the
1451          * BSS context. The PAN context is usually reassigned
1452          * by creating/removing P2P interfaces anyway.
1453          */
1454         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1455                 err = -EBUSY;
1456                 goto out;
1457         }
1458
1459         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1460                 /*
1461                  * Huh? But wait ... this can maybe happen when
1462                  * we're in the middle of a firmware restart!
1463                  */
1464                 err = -EBUSY;
1465                 goto out;
1466         }
1467
1468         /* Check if the switch is supported in the same context */
1469         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1470         if (!(interface_modes & BIT(newtype))) {
1471                 err = -EBUSY;
1472                 goto out;
1473         }
1474
1475         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1476                 for_each_context(priv, tmp) {
1477                         if (ctx == tmp)
1478                                 continue;
1479
1480                         if (!tmp->is_active)
1481                                 continue;
1482
1483                         /*
1484                          * The current mode switch would be exclusive, but
1485                          * another context is active ... refuse the switch.
1486                          */
1487                         err = -EBUSY;
1488                         goto out;
1489                 }
1490         }
1491
1492         /* success */
1493         iwl_teardown_interface(priv, vif, true);
1494         vif->type = newviftype;
1495         vif->p2p = newp2p;
1496         err = iwl_setup_interface(priv, ctx);
1497         WARN_ON(err);
1498         /*
1499          * We've switched internally, but submitting to the
1500          * device may have failed for some reason. Mask this
1501          * error, because otherwise mac80211 will not switch
1502          * (and set the interface type back) and we'll be
1503          * out of sync with it.
1504          */
1505         err = 0;
1506
1507  out:
1508         mutex_unlock(&priv->mutex);
1509         IWL_DEBUG_MAC80211(priv, "leave\n");
1510
1511         return err;
1512 }
1513
1514 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1515                               struct ieee80211_vif *vif,
1516                               struct ieee80211_scan_request *hw_req)
1517 {
1518         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1519         struct cfg80211_scan_request *req = &hw_req->req;
1520         int ret;
1521
1522         IWL_DEBUG_MAC80211(priv, "enter\n");
1523
1524         if (req->n_channels == 0)
1525                 return -EINVAL;
1526
1527         mutex_lock(&priv->mutex);
1528
1529         /*
1530          * If an internal scan is in progress, just set
1531          * up the scan_request as per above.
1532          */
1533         if (priv->scan_type != IWL_SCAN_NORMAL) {
1534                 IWL_DEBUG_SCAN(priv,
1535                                "SCAN request during internal scan - defer\n");
1536                 priv->scan_request = req;
1537                 priv->scan_vif = vif;
1538                 ret = 0;
1539         } else {
1540                 priv->scan_request = req;
1541                 priv->scan_vif = vif;
1542                 /*
1543                  * mac80211 will only ask for one band at a time
1544                  * so using channels[0] here is ok
1545                  */
1546                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1547                                         req->channels[0]->band);
1548                 if (ret) {
1549                         priv->scan_request = NULL;
1550                         priv->scan_vif = NULL;
1551                 }
1552         }
1553
1554         IWL_DEBUG_MAC80211(priv, "leave\n");
1555
1556         mutex_unlock(&priv->mutex);
1557
1558         return ret;
1559 }
1560
1561 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1562 {
1563         struct iwl_addsta_cmd cmd = {
1564                 .mode = STA_CONTROL_MODIFY_MSK,
1565                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1566                 .sta.sta_id = sta_id,
1567         };
1568
1569         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1570 }
1571
1572 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1573                                   struct ieee80211_vif *vif,
1574                                   enum sta_notify_cmd cmd,
1575                                   struct ieee80211_sta *sta)
1576 {
1577         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1578         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1579         int sta_id;
1580
1581         IWL_DEBUG_MAC80211(priv, "enter\n");
1582
1583         switch (cmd) {
1584         case STA_NOTIFY_SLEEP:
1585                 WARN_ON(!sta_priv->client);
1586                 sta_priv->asleep = true;
1587                 if (atomic_read(&sta_priv->pending_frames) > 0)
1588                         ieee80211_sta_block_awake(hw, sta, true);
1589                 break;
1590         case STA_NOTIFY_AWAKE:
1591                 WARN_ON(!sta_priv->client);
1592                 if (!sta_priv->asleep)
1593                         break;
1594                 sta_priv->asleep = false;
1595                 sta_id = iwl_sta_id(sta);
1596                 if (sta_id != IWL_INVALID_STATION)
1597                         iwl_sta_modify_ps_wake(priv, sta_id);
1598                 break;
1599         default:
1600                 break;
1601         }
1602         IWL_DEBUG_MAC80211(priv, "leave\n");
1603 }
1604
1605 const struct ieee80211_ops iwlagn_hw_ops = {
1606         .tx = iwlagn_mac_tx,
1607         .start = iwlagn_mac_start,
1608         .stop = iwlagn_mac_stop,
1609 #ifdef CONFIG_PM_SLEEP
1610         .suspend = iwlagn_mac_suspend,
1611         .resume = iwlagn_mac_resume,
1612         .set_wakeup = iwlagn_mac_set_wakeup,
1613 #endif
1614         .add_interface = iwlagn_mac_add_interface,
1615         .remove_interface = iwlagn_mac_remove_interface,
1616         .change_interface = iwlagn_mac_change_interface,
1617         .config = iwlagn_mac_config,
1618         .configure_filter = iwlagn_configure_filter,
1619         .set_key = iwlagn_mac_set_key,
1620         .update_tkip_key = iwlagn_mac_update_tkip_key,
1621         .set_rekey_data = iwlagn_mac_set_rekey_data,
1622         .conf_tx = iwlagn_mac_conf_tx,
1623         .bss_info_changed = iwlagn_bss_info_changed,
1624         .ampdu_action = iwlagn_mac_ampdu_action,
1625         .hw_scan = iwlagn_mac_hw_scan,
1626         .sta_notify = iwlagn_mac_sta_notify,
1627         .sta_state = iwlagn_mac_sta_state,
1628         .channel_switch = iwlagn_mac_channel_switch,
1629         .flush = iwlagn_mac_flush,
1630         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1631         .event_callback = iwlagn_mac_event_callback,
1632         .set_tim = iwlagn_mac_set_tim,
1633 };
1634
1635 /* This function both allocates and initializes hw and priv. */
1636 struct ieee80211_hw *iwl_alloc_all(void)
1637 {
1638         struct iwl_priv *priv;
1639         struct iwl_op_mode *op_mode;
1640         /* mac80211 allocates memory for this device instance, including
1641          *   space for this driver's private structure */
1642         struct ieee80211_hw *hw;
1643
1644         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1645                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1646         if (!hw)
1647                 goto out;
1648
1649         op_mode = hw->priv;
1650         priv = IWL_OP_MODE_GET_DVM(op_mode);
1651         priv->hw = hw;
1652
1653 out:
1654         return hw;
1655 }