drivers/net/wireless/intel/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 <linuxwifi@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         if (priv->trans->max_skb_frags)
 119                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 120
 121         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 122         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 123
 124         /*
 125          * Including the following line will crash some AP's.  This
 126          * workaround removes the stimulus which causes the crash until
 127          * the AP software can be fixed.
 128         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 129          */
 130
 131         if (priv->nvm_data->sku_cap_11n_enable)
 132                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 133                                        NL80211_FEATURE_STATIC_SMPS;
 134
 135         /*
 136          * Enable 11w if advertised by firmware and software crypto
 137          * is not enabled (as the firmware will interpret some mgmt
 138          * packets, so enabling it with software crypto isn't safe)
 139          */
 140         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 141             !iwlwifi_mod_params.swcrypto)
 142                 ieee80211_hw_set(hw, MFP_CAPABLE);
 143
 144         hw->sta_data_size = sizeof(struct iwl_station_priv);
 145         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 146
 147         for_each_context(priv, ctx) {
 148                 hw->wiphy->interface_modes |= ctx->interface_modes;
 149                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 150         }
 151
 152         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 153
 154         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 155                 hw->wiphy->iface_combinations =
 156                         iwlagn_iface_combinations_dualmode;
 157                 hw->wiphy->n_iface_combinations =
 158                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 159         }
 160
 161         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 162         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 163                                        REGULATORY_DISABLE_BEACON_HINTS;
 164
 165 #ifdef CONFIG_PM_SLEEP
 166         if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
 167             priv->trans->ops->d3_suspend &&
 168             priv->trans->ops->d3_resume &&
 169             device_can_wakeup(priv->trans->dev)) {
 170                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 171                                              WIPHY_WOWLAN_DISCONNECT |
 172                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 173                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 174                 if (!iwlwifi_mod_params.swcrypto)
 175                         priv->wowlan_support.flags |=
 176                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 177                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 178
 179                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 180                 priv->wowlan_support.pattern_min_len =
 181                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 182                 priv->wowlan_support.pattern_max_len =
 183                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 184                 hw->wiphy->wowlan = &priv->wowlan_support;
 185         }
 186 #endif
 187
 188         if (iwlwifi_mod_params.power_save)
 189                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 190         else
 191                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 192
 193         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 194         /* we create the 802.11 header and a max-length SSID element */
 195         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 196
 197         /*
 198          * We don't use all queues: 4 and 9 are unused and any
 199          * aggregation queue gets mapped down to the AC queue.
 200          */
 201         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 202
 203         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 204
 205         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 206                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 207                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 208         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 209                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 210                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 211
 212         hw->wiphy->hw_version = priv->trans->hw_id;
 213
 214         iwl_leds_init(priv);
 215
 216         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 217
 218         ret = ieee80211_register_hw(priv->hw);
 219         if (ret) {
 220                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 221                 iwl_leds_exit(priv);
 222                 return ret;
 223         }
 224         priv->mac80211_registered = 1;
 225
 226         return 0;
 227 }
 228
 229 void iwlagn_mac_unregister(struct iwl_priv *priv)
 230 {
 231         if (!priv->mac80211_registered)
 232                 return;
 233         iwl_leds_exit(priv);
 234         ieee80211_unregister_hw(priv->hw);
 235         priv->mac80211_registered = 0;
 236 }
 237
 238 static int __iwl_up(struct iwl_priv *priv)
 239 {
 240         struct iwl_rxon_context *ctx;
 241         int ret;
 242
 243         lockdep_assert_held(&priv->mutex);
 244
 245         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 246                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 247                 return -EIO;
 248         }
 249
 250         for_each_context(priv, ctx) {
 251                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 252                 if (ret) {
 253                         iwl_dealloc_bcast_stations(priv);
 254                         return ret;
 255                 }
 256         }
 257
 258         ret = iwl_trans_start_hw(priv->trans);
 259         if (ret) {
 260                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 261                 goto error;
 262         }
 263
 264         ret = iwl_run_init_ucode(priv);
 265         if (ret) {
 266                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 267                 goto error;
 268         }
 269
 270         ret = iwl_trans_start_hw(priv->trans);
 271         if (ret) {
 272                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 273                 goto error;
 274         }
 275
 276         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 277         if (ret) {
 278                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 279                 goto error;
 280         }
 281
 282         ret = iwl_alive_start(priv);
 283         if (ret)
 284                 goto error;
 285         return 0;
 286
 287  error:
 288         set_bit(STATUS_EXIT_PENDING, &priv->status);
 289         iwl_down(priv);
 290         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 291
 292         IWL_ERR(priv, "Unable to initialize device.\n");
 293         return ret;
 294 }
 295
 296 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 297 {
 298         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 299         int ret;
 300
 301         IWL_DEBUG_MAC80211(priv, "enter\n");
 302
 303         /* we should be verifying the device is ready to be opened */
 304         mutex_lock(&priv->mutex);
 305         ret = __iwl_up(priv);
 306         mutex_unlock(&priv->mutex);
 307         if (ret)
 308                 return ret;
 309
 310         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 311
 312         /* Now we should be done, and the READY bit should be set. */
 313         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 314                 ret = -EIO;
 315
 316         iwlagn_led_enable(priv);
 317
 318         priv->is_open = 1;
 319         IWL_DEBUG_MAC80211(priv, "leave\n");
 320         return ret;
 321 }
 322
 323 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 324 {
 325         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 326
 327         IWL_DEBUG_MAC80211(priv, "enter\n");
 328
 329         if (!priv->is_open)
 330                 return;
 331
 332         priv->is_open = 0;
 333
 334         mutex_lock(&priv->mutex);
 335         iwl_down(priv);
 336         mutex_unlock(&priv->mutex);
 337
 338         iwl_cancel_deferred_work(priv);
 339
 340         flush_workqueue(priv->workqueue);
 341
 342         IWL_DEBUG_MAC80211(priv, "leave\n");
 343 }
 344
 345 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 346                                       struct ieee80211_vif *vif,
 347                                       struct cfg80211_gtk_rekey_data *data)
 348 {
 349         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 350
 351         if (iwlwifi_mod_params.swcrypto)
 352                 return;
 353
 354         IWL_DEBUG_MAC80211(priv, "enter\n");
 355         mutex_lock(&priv->mutex);
 356
 357         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 358                 goto out;
 359
 360         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 361         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 362         priv->replay_ctr =
 363                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 364         priv->have_rekey_data = true;
 365
 366  out:
 367         mutex_unlock(&priv->mutex);
 368         IWL_DEBUG_MAC80211(priv, "leave\n");
 369 }
 370
 371 #ifdef CONFIG_PM_SLEEP
 372
 373 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 374                               struct cfg80211_wowlan *wowlan)
 375 {
 376         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 377         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 378         int ret;
 379
 380         if (WARN_ON(!wowlan))
 381                 return -EINVAL;
 382
 383         IWL_DEBUG_MAC80211(priv, "enter\n");
 384         mutex_lock(&priv->mutex);
 385
 386         /* Don't attempt WoWLAN when not associated, tear down instead. */
 387         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 388             !iwl_is_associated_ctx(ctx)) {
 389                 ret = 1;
 390                 goto out;
 391         }
 392
 393         ret = iwlagn_suspend(priv, wowlan);
 394         if (ret)
 395                 goto error;
 396
 397         /* let the ucode operate on its own */
 398         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 399                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 400
 401         iwl_trans_d3_suspend(priv->trans, false, true);
 402
 403         goto out;
 404
 405  error:
 406         priv->wowlan = false;
 407         iwlagn_prepare_restart(priv);
 408         ieee80211_restart_hw(priv->hw);
 409  out:
 410         mutex_unlock(&priv->mutex);
 411         IWL_DEBUG_MAC80211(priv, "leave\n");
 412
 413         return ret;
 414 }
 415
 416 struct iwl_resume_data {
 417         struct iwl_priv *priv;
 418         struct iwlagn_wowlan_status *cmd;
 419         bool valid;
 420 };
 421
 422 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 423                                  struct iwl_rx_packet *pkt, void *data)
 424 {
 425         struct iwl_resume_data *resume_data = data;
 426         struct iwl_priv *priv = resume_data->priv;
 427
 428         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 429                 IWL_ERR(priv, "rx wrong size data\n");
 430                 return true;
 431         }
 432         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 433         resume_data->valid = true;
 434
 435         return true;
 436 }
 437
 438 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 439 {
 440         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 441         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 442         struct ieee80211_vif *vif;
 443         u32 base;
 444         int ret;
 445         enum iwl_d3_status d3_status;
 446         struct error_table_start {
 447                 /* cf. struct iwl_error_event_table */
 448                 u32 valid;
 449                 u32 error_id;
 450         } err_info;
 451         struct iwl_notification_wait status_wait;
 452         static const u16 status_cmd[] = {
 453                 REPLY_WOWLAN_GET_STATUS,
 454         };
 455         struct iwlagn_wowlan_status status_data = {};
 456         struct iwl_resume_data resume_data = {
 457                 .priv = priv,
 458                 .cmd = &status_data,
 459                 .valid = false,
 460         };
 461         struct cfg80211_wowlan_wakeup wakeup = {
 462                 .pattern_idx = -1,
 463         };
 464 #ifdef CONFIG_IWLWIFI_DEBUGFS
 465         const struct fw_img *img;
 466 #endif
 467
 468         IWL_DEBUG_MAC80211(priv, "enter\n");
 469         mutex_lock(&priv->mutex);
 470
 471         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 472         vif = ctx->vif;
 473
 474         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
 475         if (ret)
 476                 goto out_unlock;
 477
 478         if (d3_status != IWL_D3_STATUS_ALIVE) {
 479                 IWL_INFO(priv, "Device was reset during suspend\n");
 480                 goto out_unlock;
 481         }
 482
 483         /* uCode is no longer operating by itself */
 484         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 485                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 486
 487         base = priv->device_pointers.error_event_table;
 488         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 489                 IWL_WARN(priv, "Invalid error table during resume!\n");
 490                 goto out_unlock;
 491         }
 492
 493         iwl_trans_read_mem_bytes(priv->trans, base,
 494                                  &err_info, sizeof(err_info));
 495
 496         if (err_info.valid) {
 497                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 498                          err_info.valid, err_info.error_id);
 499                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 500                         wakeup.rfkill_release = true;
 501                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 502                                                        GFP_KERNEL);
 503                 }
 504                 goto out_unlock;
 505         }
 506
 507 #ifdef CONFIG_IWLWIFI_DEBUGFS
 508         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 509         if (!priv->wowlan_sram)
 510                 priv->wowlan_sram =
 511                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 512                                 GFP_KERNEL);
 513
 514         if (priv->wowlan_sram)
 515                 iwl_trans_read_mem(priv->trans, 0x800000,
 516                                    priv->wowlan_sram,
 517                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 518 #endif
 519
 520         /*
 521          * This is very strange. The GET_STATUS command is sent but the device
 522          * doesn't reply properly, it seems it doesn't close the RBD so one is
 523          * always left open ... As a result, we need to send another command
 524          * and have to reset the driver afterwards. As we need to switch to
 525          * runtime firmware again that'll happen.
 526          */
 527
 528         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 529                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 530                                    &resume_data);
 531
 532         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 533         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 534         /* an RBD is left open in the firmware now! */
 535
 536         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 537         if (ret)
 538                 goto out_unlock;
 539
 540         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 541                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 542                 struct cfg80211_wowlan_wakeup *wakeup_report;
 543
 544                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 545
 546                 if (reasons) {
 547                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 548                                 wakeup.magic_pkt = true;
 549                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 550                                 wakeup.pattern_idx = status_data.pattern_number;
 551                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 552                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 553                                 wakeup.disconnect = true;
 554                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 555                                 wakeup.gtk_rekey_failure = true;
 556                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 557                                 wakeup.eap_identity_req = true;
 558                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 559                                 wakeup.four_way_handshake = true;
 560                         wakeup_report = &wakeup;
 561                 } else {
 562                         wakeup_report = NULL;
 563                 }
 564
 565                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 566         }
 567
 568         priv->wowlan = false;
 569
 570         iwlagn_prepare_restart(priv);
 571
 572         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 573         iwl_connection_init_rx_config(priv, ctx);
 574         iwlagn_set_rxon_chain(priv, ctx);
 575
 576  out_unlock:
 577         mutex_unlock(&priv->mutex);
 578         IWL_DEBUG_MAC80211(priv, "leave\n");
 579
 580         ieee80211_resume_disconnect(vif);
 581
 582         return 1;
 583 }
 584
 585 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 586 {
 587         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 588
 589         device_set_wakeup_enable(priv->trans->dev, enabled);
 590 }
 591 #endif
 592
 593 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 594                           struct ieee80211_tx_control *control,
 595                           struct sk_buff *skb)
 596 {
 597         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 598
 599         if (iwlagn_tx_skb(priv, control->sta, skb))
 600                 ieee80211_free_txskb(hw, skb);
 601 }
 602
 603 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 604                                        struct ieee80211_vif *vif,
 605                                        struct ieee80211_key_conf *keyconf,
 606                                        struct ieee80211_sta *sta,
 607                                        u32 iv32, u16 *phase1key)
 608 {
 609         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 610
 611         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 612 }
 613
 614 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 615                               struct ieee80211_vif *vif,
 616                               struct ieee80211_sta *sta,
 617                               struct ieee80211_key_conf *key)
 618 {
 619         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 620         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 621         struct iwl_rxon_context *ctx = vif_priv->ctx;
 622         int ret;
 623         bool is_default_wep_key = false;
 624
 625         IWL_DEBUG_MAC80211(priv, "enter\n");
 626
 627         if (iwlwifi_mod_params.swcrypto) {
 628                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 629                 return -EOPNOTSUPP;
 630         }
 631
 632         switch (key->cipher) {
 633         case WLAN_CIPHER_SUITE_TKIP:
 634                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 635                 /* fall through */
 636         case WLAN_CIPHER_SUITE_CCMP:
 637                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 638                 break;
 639         default:
 640                 break;
 641         }
 642
 643         /*
 644          * We could program these keys into the hardware as well, but we
 645          * don't expect much multicast traffic in IBSS and having keys
 646          * for more stations is probably more useful.
 647          *
 648          * Mark key TX-only and return 0.
 649          */
 650         if (vif->type == NL80211_IFTYPE_ADHOC &&
 651             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 652                 key->hw_key_idx = WEP_INVALID_OFFSET;
 653                 return 0;
 654         }
 655
 656         /* If they key was TX-only, accept deletion */
 657         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 658                 return 0;
 659
 660         mutex_lock(&priv->mutex);
 661         iwl_scan_cancel_timeout(priv, 100);
 662
 663         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 664
 665         /*
 666          * If we are getting WEP group key and we didn't receive any key mapping
 667          * so far, we are in legacy wep mode (group key only), otherwise we are
 668          * in 1X mode.
 669          * In legacy wep mode, we use another host command to the uCode.
 670          */
 671         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 672              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 673                 if (cmd == SET_KEY)
 674                         is_default_wep_key = !ctx->key_mapping_keys;
 675                 else
 676                         is_default_wep_key =
 677                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 678         }
 679
 680
 681         switch (cmd) {
 682         case SET_KEY:
 683                 if (is_default_wep_key) {
 684                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 685                         break;
 686                 }
 687                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 688                 if (ret) {
 689                         /*
 690                          * can't add key for RX, but we don't need it
 691                          * in the device for TX so still return 0
 692                          */
 693                         ret = 0;
 694                         key->hw_key_idx = WEP_INVALID_OFFSET;
 695                 }
 696
 697                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 698                 break;
 699         case DISABLE_KEY:
 700                 if (is_default_wep_key)
 701                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 702                 else
 703                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 704
 705                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 706                 break;
 707         default:
 708                 ret = -EINVAL;
 709         }
 710
 711         mutex_unlock(&priv->mutex);
 712         IWL_DEBUG_MAC80211(priv, "leave\n");
 713
 714         return ret;
 715 }
 716
 717 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 718 {
 719         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 720                 return false;
 721         return true;
 722 }
 723
 724 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 725 {
 726         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 727                 return false;
 728         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 729                 return true;
 730
 731         /* disabled by default */
 732         return false;
 733 }
 734
 735 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 736                                    struct ieee80211_vif *vif,
 737                                    struct ieee80211_ampdu_params *params)
 738 {
 739         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 740         int ret = -EINVAL;
 741         struct ieee80211_sta *sta = params->sta;
 742         enum ieee80211_ampdu_mlme_action action = params->action;
 743         u16 tid = params->tid;
 744         u16 *ssn = &params->ssn;
 745         u8 buf_size = params->buf_size;
 746         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 747
 748         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 749                      sta->addr, tid);
 750
 751         if (!(priv->nvm_data->sku_cap_11n_enable))
 752                 return -EACCES;
 753
 754         IWL_DEBUG_MAC80211(priv, "enter\n");
 755         mutex_lock(&priv->mutex);
 756
 757         switch (action) {
 758         case IEEE80211_AMPDU_RX_START:
 759                 if (!iwl_enable_rx_ampdu(priv->cfg))
 760                         break;
 761                 IWL_DEBUG_HT(priv, "start Rx\n");
 762                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 763                 break;
 764         case IEEE80211_AMPDU_RX_STOP:
 765                 IWL_DEBUG_HT(priv, "stop Rx\n");
 766                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 767                 break;
 768         case IEEE80211_AMPDU_TX_START:
 769                 if (!priv->trans->ops->txq_enable)
 770                         break;
 771                 if (!iwl_enable_tx_ampdu(priv->cfg))
 772                         break;
 773                 IWL_DEBUG_HT(priv, "start Tx\n");
 774                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 775                 break;
 776         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 777         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 778                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 779                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 780                 break;
 781         case IEEE80211_AMPDU_TX_STOP_CONT:
 782                 IWL_DEBUG_HT(priv, "stop Tx\n");
 783                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 784                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 785                         priv->agg_tids_count--;
 786                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 787                                      priv->agg_tids_count);
 788                 }
 789                 if (!priv->agg_tids_count &&
 790                     priv->hw_params.use_rts_for_aggregation) {
 791                         /*
 792                          * switch off RTS/CTS if it was previously enabled
 793                          */
 794                         sta_priv->lq_sta.lq.general_params.flags &=
 795                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 796                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 797                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 798                 }
 799                 break;
 800         case IEEE80211_AMPDU_TX_OPERATIONAL:
 801                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 802                 break;
 803         }
 804         mutex_unlock(&priv->mutex);
 805         IWL_DEBUG_MAC80211(priv, "leave\n");
 806         return ret;
 807 }
 808
 809 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 810                               struct ieee80211_vif *vif,
 811                               struct ieee80211_sta *sta)
 812 {
 813         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 814         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 815         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 816         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 817         int ret;
 818         u8 sta_id;
 819
 820         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 821                         sta->addr);
 822         sta_priv->sta_id = IWL_INVALID_STATION;
 823
 824         atomic_set(&sta_priv->pending_frames, 0);
 825         if (vif->type == NL80211_IFTYPE_AP)
 826                 sta_priv->client = true;
 827
 828         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 829                                      is_ap, sta, &sta_id);
 830         if (ret) {
 831                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 832                         sta->addr, ret);
 833                 /* Should we return success if return code is EEXIST ? */
 834                 return ret;
 835         }
 836
 837         sta_priv->sta_id = sta_id;
 838
 839         return 0;
 840 }
 841
 842 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 843                                  struct ieee80211_vif *vif,
 844                                  struct ieee80211_sta *sta)
 845 {
 846         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 847         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 848         int ret;
 849
 850         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 851
 852         if (vif->type == NL80211_IFTYPE_STATION) {
 853                 /*
 854                  * Station will be removed from device when the RXON
 855                  * is set to unassociated -- just deactivate it here
 856                  * to avoid re-programming it.
 857                  */
 858                 ret = 0;
 859                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 860         } else {
 861                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 862                 if (ret)
 863                         IWL_DEBUG_QUIET_RFKILL(priv,
 864                                 "Error removing station %pM\n", sta->addr);
 865         }
 866         return ret;
 867 }
 868
 869 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 870                                 struct ieee80211_vif *vif,
 871                                 struct ieee80211_sta *sta,
 872                                 enum ieee80211_sta_state old_state,
 873                                 enum ieee80211_sta_state new_state)
 874 {
 875         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 876         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 877         enum {
 878                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 879         } op = NONE;
 880         int ret;
 881
 882         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 883                            sta->addr, old_state, new_state);
 884
 885         mutex_lock(&priv->mutex);
 886         if (vif->type == NL80211_IFTYPE_STATION) {
 887                 if (old_state == IEEE80211_STA_NOTEXIST &&
 888                     new_state == IEEE80211_STA_NONE)
 889                         op = ADD;
 890                 else if (old_state == IEEE80211_STA_NONE &&
 891                          new_state == IEEE80211_STA_NOTEXIST)
 892                         op = REMOVE;
 893                 else if (old_state == IEEE80211_STA_AUTH &&
 894                          new_state == IEEE80211_STA_ASSOC)
 895                         op = HT_RATE_INIT;
 896         } else {
 897                 if (old_state == IEEE80211_STA_AUTH &&
 898                     new_state == IEEE80211_STA_ASSOC)
 899                         op = ADD_RATE_INIT;
 900                 else if (old_state == IEEE80211_STA_ASSOC &&
 901                          new_state == IEEE80211_STA_AUTH)
 902                         op = REMOVE;
 903         }
 904
 905         switch (op) {
 906         case ADD:
 907                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 908                 if (ret)
 909                         break;
 910                 /*
 911                  * Clear the in-progress flag, the AP station entry was added
 912                  * but we'll initialize LQ only when we've associated (which
 913                  * would also clear the in-progress flag). This is necessary
 914                  * in case we never initialize LQ because association fails.
 915                  */
 916                 spin_lock_bh(&priv->sta_lock);
 917                 priv->stations[iwl_sta_id(sta)].used &=
 918                         ~IWL_STA_UCODE_INPROGRESS;
 919                 spin_unlock_bh(&priv->sta_lock);
 920                 break;
 921         case REMOVE:
 922                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 923                 break;
 924         case ADD_RATE_INIT:
 925                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 926                 if (ret)
 927                         break;
 928                 /* Initialize rate scaling */
 929                 IWL_DEBUG_INFO(priv,
 930                                "Initializing rate scaling for station %pM\n",
 931                                sta->addr);
 932                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 933                 ret = 0;
 934                 break;
 935         case HT_RATE_INIT:
 936                 /* Initialize rate scaling */
 937                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 938                 if (ret)
 939                         break;
 940                 IWL_DEBUG_INFO(priv,
 941                                "Initializing rate scaling for station %pM\n",
 942                                sta->addr);
 943                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 944                 ret = 0;
 945                 break;
 946         default:
 947                 ret = 0;
 948                 break;
 949         }
 950
 951         /*
 952          * mac80211 might WARN if we fail, but due the way we
 953          * (badly) handle hard rfkill, we might fail here
 954          */
 955         if (iwl_is_rfkill(priv))
 956                 ret = 0;
 957
 958         mutex_unlock(&priv->mutex);
 959         IWL_DEBUG_MAC80211(priv, "leave\n");
 960
 961         return ret;
 962 }
 963
 964 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 965                                       struct ieee80211_vif *vif,
 966                                       struct ieee80211_channel_switch *ch_switch)
 967 {
 968         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 969         struct ieee80211_conf *conf = &hw->conf;
 970         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 971         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 972         /*
 973          * MULTI-FIXME
 974          * When we add support for multiple interfaces, we need to
 975          * revisit this. The channel switch command in the device
 976          * only affects the BSS context, but what does that really
 977          * mean? And what if we get a CSA on the second interface?
 978          * This needs a lot of work.
 979          */
 980         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 981         u16 ch;
 982
 983         IWL_DEBUG_MAC80211(priv, "enter\n");
 984
 985         mutex_lock(&priv->mutex);
 986
 987         if (iwl_is_rfkill(priv))
 988                 goto out;
 989
 990         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 991             test_bit(STATUS_SCANNING, &priv->status) ||
 992             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 993                 goto out;
 994
 995         if (!iwl_is_associated_ctx(ctx))
 996                 goto out;
 997
 998         if (!priv->lib->set_channel_switch)
 999                 goto out;
1000
1001         ch = channel->hw_value;
1002         if (le16_to_cpu(ctx->active.channel) == ch)
1003                 goto out;
1004
1005         priv->current_ht_config.smps = conf->smps_mode;
1006
1007         /* Configure HT40 channels */
1008         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1009         case NL80211_CHAN_NO_HT:
1010         case NL80211_CHAN_HT20:
1011                 ctx->ht.is_40mhz = false;
1012                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1013                 break;
1014         case NL80211_CHAN_HT40MINUS:
1015                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1016                 ctx->ht.is_40mhz = true;
1017                 break;
1018         case NL80211_CHAN_HT40PLUS:
1019                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1020                 ctx->ht.is_40mhz = true;
1021                 break;
1022         }
1023
1024         if ((le16_to_cpu(ctx->staging.channel) != ch))
1025                 ctx->staging.flags = 0;
1026
1027         iwl_set_rxon_channel(priv, channel, ctx);
1028         iwl_set_rxon_ht(priv, ht_conf);
1029         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1030
1031         /*
1032          * at this point, staging_rxon has the
1033          * configuration for channel switch
1034          */
1035         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1036         priv->switch_channel = cpu_to_le16(ch);
1037         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1038                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1039                 priv->switch_channel = 0;
1040                 ieee80211_chswitch_done(ctx->vif, false);
1041         }
1042
1043 out:
1044         mutex_unlock(&priv->mutex);
1045         IWL_DEBUG_MAC80211(priv, "leave\n");
1046 }
1047
1048 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1049 {
1050         /*
1051          * MULTI-FIXME
1052          * See iwlagn_mac_channel_switch.
1053          */
1054         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1055
1056         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1057                 return;
1058
1059         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1060                 return;
1061
1062         if (ctx->vif)
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, 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 |
1113                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1114 }
1115
1116 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1117                              u32 queues, bool drop)
1118 {
1119         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1120         u32 scd_queues;
1121
1122         mutex_lock(&priv->mutex);
1123         IWL_DEBUG_MAC80211(priv, "enter\n");
1124
1125         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1126                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1127                 goto done;
1128         }
1129         if (iwl_is_rfkill(priv)) {
1130                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1131                 goto done;
1132         }
1133
1134         scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1135         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1136                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1137
1138         if (drop) {
1139                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1140                                     scd_queues);
1141                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1142                         IWL_ERR(priv, "flush request fail\n");
1143                         goto done;
1144                 }
1145         }
1146
1147         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1148         iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1149 done:
1150         mutex_unlock(&priv->mutex);
1151         IWL_DEBUG_MAC80211(priv, "leave\n");
1152 }
1153
1154 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1155                                       struct ieee80211_vif *vif,
1156                                       const struct ieee80211_event *event)
1157 {
1158         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1159
1160         if (event->type != RSSI_EVENT)
1161                 return;
1162
1163         IWL_DEBUG_MAC80211(priv, "enter\n");
1164
1165         if (priv->lib->bt_params &&
1166             priv->lib->bt_params->advanced_bt_coexist) {
1167                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1168                         priv->bt_enable_pspoll = true;
1169                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1170                         priv->bt_enable_pspoll = false;
1171
1172                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1173         } else {
1174                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1175                                 "ignoring RSSI callback\n");
1176         }
1177
1178         IWL_DEBUG_MAC80211(priv, "leave\n");
1179 }
1180
1181 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1182                               struct ieee80211_sta *sta, bool set)
1183 {
1184         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1185
1186         queue_work(priv->workqueue, &priv->beacon_update);
1187
1188         return 0;
1189 }
1190
1191 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1192                               struct ieee80211_vif *vif, u16 queue,
1193                               const struct ieee80211_tx_queue_params *params)
1194 {
1195         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1196         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1197         struct iwl_rxon_context *ctx = vif_priv->ctx;
1198         int q;
1199
1200         if (WARN_ON(!ctx))
1201                 return -EINVAL;
1202
1203         IWL_DEBUG_MAC80211(priv, "enter\n");
1204
1205         if (!iwl_is_ready_rf(priv)) {
1206                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1207                 return -EIO;
1208         }
1209
1210         if (queue >= AC_NUM) {
1211                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1212                 return 0;
1213         }
1214
1215         q = AC_NUM - 1 - queue;
1216
1217         mutex_lock(&priv->mutex);
1218
1219         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1220                 cpu_to_le16(params->cw_min);
1221         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1222                 cpu_to_le16(params->cw_max);
1223         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1224         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1225                         cpu_to_le16((params->txop * 32));
1226
1227         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1228
1229         mutex_unlock(&priv->mutex);
1230
1231         IWL_DEBUG_MAC80211(priv, "leave\n");
1232         return 0;
1233 }
1234
1235 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1236 {
1237         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1238
1239         return priv->ibss_manager == IWL_IBSS_MANAGER;
1240 }
1241
1242 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1243 {
1244         iwl_connection_init_rx_config(priv, ctx);
1245
1246         iwlagn_set_rxon_chain(priv, ctx);
1247
1248         return iwlagn_commit_rxon(priv, ctx);
1249 }
1250
1251 static int iwl_setup_interface(struct iwl_priv *priv,
1252                                struct iwl_rxon_context *ctx)
1253 {
1254         struct ieee80211_vif *vif = ctx->vif;
1255         int err, ac;
1256
1257         lockdep_assert_held(&priv->mutex);
1258
1259         /*
1260          * This variable will be correct only when there's just
1261          * a single context, but all code using it is for hardware
1262          * that supports only one context.
1263          */
1264         priv->iw_mode = vif->type;
1265
1266         ctx->is_active = true;
1267
1268         err = iwl_set_mode(priv, ctx);
1269         if (err) {
1270                 if (!ctx->always_active)
1271                         ctx->is_active = false;
1272                 return err;
1273         }
1274
1275         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1276             vif->type == NL80211_IFTYPE_ADHOC) {
1277                 /*
1278                  * pretend to have high BT traffic as long as we
1279                  * are operating in IBSS mode, as this will cause
1280                  * the rate scaling etc. to behave as intended.
1281                  */
1282                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1283         }
1284
1285         /* set up queue mappings */
1286         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1287                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1288
1289         if (vif->type == NL80211_IFTYPE_AP)
1290                 vif->cab_queue = ctx->mcast_queue;
1291         else
1292                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1293
1294         return 0;
1295 }
1296
1297 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1298                                     struct ieee80211_vif *vif)
1299 {
1300         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1301         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1302         struct iwl_rxon_context *tmp, *ctx = NULL;
1303         int err;
1304         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1305         bool reset = false;
1306
1307         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1308                            viftype, vif->addr);
1309
1310         mutex_lock(&priv->mutex);
1311
1312         if (!iwl_is_ready_rf(priv)) {
1313                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1314                 err = -EINVAL;
1315                 goto out;
1316         }
1317
1318         for_each_context(priv, tmp) {
1319                 u32 possible_modes =
1320                         tmp->interface_modes | tmp->exclusive_interface_modes;
1321
1322                 if (tmp->vif) {
1323                         /* On reset we need to add the same interface again */
1324                         if (tmp->vif == vif) {
1325                                 reset = true;
1326                                 ctx = tmp;
1327                                 break;
1328                         }
1329
1330                         /* check if this busy context is exclusive */
1331                         if (tmp->exclusive_interface_modes &
1332                                                 BIT(tmp->vif->type)) {
1333                                 err = -EINVAL;
1334                                 goto out;
1335                         }
1336                         continue;
1337                 }
1338
1339                 if (!(possible_modes & BIT(viftype)))
1340                         continue;
1341
1342                 /* have maybe usable context w/o interface */
1343                 ctx = tmp;
1344                 break;
1345         }
1346
1347         if (!ctx) {
1348                 err = -EOPNOTSUPP;
1349                 goto out;
1350         }
1351
1352         vif_priv->ctx = ctx;
1353         ctx->vif = vif;
1354
1355         /*
1356          * In SNIFFER device type, the firmware reports the FCS to
1357          * the host, rather than snipping it off. Unfortunately,
1358          * mac80211 doesn't (yet) provide a per-packet flag for
1359          * this, so that we have to set the hardware flag based
1360          * on the interfaces added. As the monitor interface can
1361          * only be present by itself, and will be removed before
1362          * other interfaces are added, this is safe.
1363          */
1364         if (vif->type == NL80211_IFTYPE_MONITOR)
1365                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1366         else
1367                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1368
1369         err = iwl_setup_interface(priv, ctx);
1370         if (!err || reset)
1371                 goto out;
1372
1373         ctx->vif = NULL;
1374         priv->iw_mode = NL80211_IFTYPE_STATION;
1375  out:
1376         mutex_unlock(&priv->mutex);
1377
1378         IWL_DEBUG_MAC80211(priv, "leave\n");
1379         return err;
1380 }
1381
1382 static void iwl_teardown_interface(struct iwl_priv *priv,
1383                                    struct ieee80211_vif *vif,
1384                                    bool mode_change)
1385 {
1386         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1387
1388         lockdep_assert_held(&priv->mutex);
1389
1390         if (priv->scan_vif == vif) {
1391                 iwl_scan_cancel_timeout(priv, 200);
1392                 iwl_force_scan_end(priv);
1393         }
1394
1395         if (!mode_change) {
1396                 iwl_set_mode(priv, ctx);
1397                 if (!ctx->always_active)
1398                         ctx->is_active = false;
1399         }
1400
1401         /*
1402          * When removing the IBSS interface, overwrite the
1403          * BT traffic load with the stored one from the last
1404          * notification, if any. If this is a device that
1405          * doesn't implement this, this has no effect since
1406          * both values are the same and zero.
1407          */
1408         if (vif->type == NL80211_IFTYPE_ADHOC)
1409                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1410 }
1411
1412 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1413                               struct ieee80211_vif *vif)
1414 {
1415         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1416         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1417
1418         IWL_DEBUG_MAC80211(priv, "enter\n");
1419
1420         mutex_lock(&priv->mutex);
1421
1422         WARN_ON(ctx->vif != vif);
1423         ctx->vif = NULL;
1424
1425         iwl_teardown_interface(priv, vif, false);
1426
1427         mutex_unlock(&priv->mutex);
1428
1429         IWL_DEBUG_MAC80211(priv, "leave\n");
1430
1431 }
1432
1433 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1434                                        struct ieee80211_vif *vif,
1435                                        enum nl80211_iftype newtype, bool newp2p)
1436 {
1437         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1438         struct iwl_rxon_context *ctx, *tmp;
1439         enum nl80211_iftype newviftype = newtype;
1440         u32 interface_modes;
1441         int err;
1442
1443         IWL_DEBUG_MAC80211(priv, "enter\n");
1444
1445         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1446
1447         mutex_lock(&priv->mutex);
1448
1449         ctx = iwl_rxon_ctx_from_vif(vif);
1450
1451         /*
1452          * To simplify this code, only support changes on the
1453          * BSS context. The PAN context is usually reassigned
1454          * by creating/removing P2P interfaces anyway.
1455          */
1456         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1457                 err = -EBUSY;
1458                 goto out;
1459         }
1460
1461         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1462                 /*
1463                  * Huh? But wait ... this can maybe happen when
1464                  * we're in the middle of a firmware restart!
1465                  */
1466                 err = -EBUSY;
1467                 goto out;
1468         }
1469
1470         /* Check if the switch is supported in the same context */
1471         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1472         if (!(interface_modes & BIT(newtype))) {
1473                 err = -EBUSY;
1474                 goto out;
1475         }
1476
1477         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1478                 for_each_context(priv, tmp) {
1479                         if (ctx == tmp)
1480                                 continue;
1481
1482                         if (!tmp->is_active)
1483                                 continue;
1484
1485                         /*
1486                          * The current mode switch would be exclusive, but
1487                          * another context is active ... refuse the switch.
1488                          */
1489                         err = -EBUSY;
1490                         goto out;
1491                 }
1492         }
1493
1494         /* success */
1495         iwl_teardown_interface(priv, vif, true);
1496         vif->type = newviftype;
1497         vif->p2p = newp2p;
1498         err = iwl_setup_interface(priv, ctx);
1499         WARN_ON(err);
1500         /*
1501          * We've switched internally, but submitting to the
1502          * device may have failed for some reason. Mask this
1503          * error, because otherwise mac80211 will not switch
1504          * (and set the interface type back) and we'll be
1505          * out of sync with it.
1506          */
1507         err = 0;
1508
1509  out:
1510         mutex_unlock(&priv->mutex);
1511         IWL_DEBUG_MAC80211(priv, "leave\n");
1512
1513         return err;
1514 }
1515
1516 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1517                               struct ieee80211_vif *vif,
1518                               struct ieee80211_scan_request *hw_req)
1519 {
1520         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1521         struct cfg80211_scan_request *req = &hw_req->req;
1522         int ret;
1523
1524         IWL_DEBUG_MAC80211(priv, "enter\n");
1525
1526         if (req->n_channels == 0)
1527                 return -EINVAL;
1528
1529         mutex_lock(&priv->mutex);
1530
1531         /*
1532          * If an internal scan is in progress, just set
1533          * up the scan_request as per above.
1534          */
1535         if (priv->scan_type != IWL_SCAN_NORMAL) {
1536                 IWL_DEBUG_SCAN(priv,
1537                                "SCAN request during internal scan - defer\n");
1538                 priv->scan_request = req;
1539                 priv->scan_vif = vif;
1540                 ret = 0;
1541         } else {
1542                 priv->scan_request = req;
1543                 priv->scan_vif = vif;
1544                 /*
1545                  * mac80211 will only ask for one band at a time
1546                  * so using channels[0] here is ok
1547                  */
1548                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1549                                         req->channels[0]->band);
1550                 if (ret) {
1551                         priv->scan_request = NULL;
1552                         priv->scan_vif = NULL;
1553                 }
1554         }
1555
1556         IWL_DEBUG_MAC80211(priv, "leave\n");
1557
1558         mutex_unlock(&priv->mutex);
1559
1560         return ret;
1561 }
1562
1563 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1564 {
1565         struct iwl_addsta_cmd cmd = {
1566                 .mode = STA_CONTROL_MODIFY_MSK,
1567                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1568                 .sta.sta_id = sta_id,
1569         };
1570
1571         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1572 }
1573
1574 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1575                                   struct ieee80211_vif *vif,
1576                                   enum sta_notify_cmd cmd,
1577                                   struct ieee80211_sta *sta)
1578 {
1579         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1580         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1581         int sta_id;
1582
1583         IWL_DEBUG_MAC80211(priv, "enter\n");
1584
1585         switch (cmd) {
1586         case STA_NOTIFY_SLEEP:
1587                 WARN_ON(!sta_priv->client);
1588                 sta_priv->asleep = true;
1589                 if (atomic_read(&sta_priv->pending_frames) > 0)
1590                         ieee80211_sta_block_awake(hw, sta, true);
1591                 break;
1592         case STA_NOTIFY_AWAKE:
1593                 WARN_ON(!sta_priv->client);
1594                 if (!sta_priv->asleep)
1595                         break;
1596                 sta_priv->asleep = false;
1597                 sta_id = iwl_sta_id(sta);
1598                 if (sta_id != IWL_INVALID_STATION)
1599                         iwl_sta_modify_ps_wake(priv, sta_id);
1600                 break;
1601         default:
1602                 break;
1603         }
1604         IWL_DEBUG_MAC80211(priv, "leave\n");
1605 }
1606
1607 const struct ieee80211_ops iwlagn_hw_ops = {
1608         .tx = iwlagn_mac_tx,
1609         .start = iwlagn_mac_start,
1610         .stop = iwlagn_mac_stop,
1611 #ifdef CONFIG_PM_SLEEP
1612         .suspend = iwlagn_mac_suspend,
1613         .resume = iwlagn_mac_resume,
1614         .set_wakeup = iwlagn_mac_set_wakeup,
1615 #endif
1616         .add_interface = iwlagn_mac_add_interface,
1617         .remove_interface = iwlagn_mac_remove_interface,
1618         .change_interface = iwlagn_mac_change_interface,
1619         .config = iwlagn_mac_config,
1620         .configure_filter = iwlagn_configure_filter,
1621         .set_key = iwlagn_mac_set_key,
1622         .update_tkip_key = iwlagn_mac_update_tkip_key,
1623         .set_rekey_data = iwlagn_mac_set_rekey_data,
1624         .conf_tx = iwlagn_mac_conf_tx,
1625         .bss_info_changed = iwlagn_bss_info_changed,
1626         .ampdu_action = iwlagn_mac_ampdu_action,
1627         .hw_scan = iwlagn_mac_hw_scan,
1628         .sta_notify = iwlagn_mac_sta_notify,
1629         .sta_state = iwlagn_mac_sta_state,
1630         .channel_switch = iwlagn_mac_channel_switch,
1631         .flush = iwlagn_mac_flush,
1632         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1633         .event_callback = iwlagn_mac_event_callback,
1634         .set_tim = iwlagn_mac_set_tim,
1635 };
1636
1637 /* This function both allocates and initializes hw and priv. */
1638 struct ieee80211_hw *iwl_alloc_all(void)
1639 {
1640         struct iwl_priv *priv;
1641         struct iwl_op_mode *op_mode;
1642         /* mac80211 allocates memory for this device instance, including
1643          *   space for this driver's private structure */
1644         struct ieee80211_hw *hw;
1645
1646         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1647                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1648         if (!hw)
1649                 goto out;
1650
1651         op_mode = hw->priv;
1652         priv = IWL_OP_MODE_GET_DVM(op_mode);
1653         priv->hw = hw;
1654
1655 out:
1656         return hw;
1657 }