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

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This source file includes following definitions.
iwlagn_mac_setup_register
iwlagn_mac_unregister
__iwl_up
iwlagn_mac_start
iwlagn_mac_stop
iwlagn_mac_set_rekey_data
iwlagn_mac_suspend
iwl_resume_status_fn
iwlagn_mac_resume
iwlagn_mac_set_wakeup
iwlagn_mac_tx
iwlagn_mac_update_tkip_key
iwlagn_mac_set_key
iwlagn_mac_ampdu_action
iwlagn_mac_sta_add
iwlagn_mac_sta_remove
iwlagn_mac_sta_state
iwlagn_mac_channel_switch
iwl_chswitch_done
iwlagn_configure_filter
iwlagn_mac_flush
iwlagn_mac_event_callback
iwlagn_mac_set_tim
iwlagn_mac_conf_tx
iwlagn_mac_tx_last_beacon
iwl_set_mode
iwl_setup_interface
iwlagn_mac_add_interface
iwl_teardown_interface
iwlagn_mac_remove_interface
iwlagn_mac_change_interface
iwlagn_mac_hw_scan
iwl_sta_modify_ps_wake
iwlagn_mac_sta_notify
iwl_alloc_all
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright (C) 2018 - 2019 Intel Corporation
   6  *
   7  * Portions of this file are derived from the ipw3945 project, as well
   8  * as portions of the ieee80211 subsystem header files.
   9  *
  10  * Contact Information:
  11  *  Intel Linux Wireless <linuxwifi@intel.com>
  12  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  13  *
  14  *****************************************************************************/
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/delay.h>
  20 #include <linux/sched.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/if_arp.h>
  25 
  26 #include <net/ieee80211_radiotap.h>
  27 #include <net/mac80211.h>
  28 
  29 #include <asm/div64.h>
  30 
  31 #include "iwl-io.h"
  32 #include "iwl-trans.h"
  33 #include "iwl-op-mode.h"
  34 #include "iwl-modparams.h"
  35 
  36 #include "dev.h"
  37 #include "calib.h"
  38 #include "agn.h"
  39 
  40 /*****************************************************************************
  41  *
  42  * mac80211 entry point functions
  43  *
  44  *****************************************************************************/
  45 
  46 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  47         {
  48                 .max = 1,
  49                 .types = BIT(NL80211_IFTYPE_STATION),
  50         },
  51         {
  52                 .max = 1,
  53                 .types = BIT(NL80211_IFTYPE_AP),
  54         },
  55 };
  56 
  57 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  58         {
  59                 .max = 2,
  60                 .types = BIT(NL80211_IFTYPE_STATION),
  61         },
  62 };
  63 
  64 static const struct ieee80211_iface_combination
  65 iwlagn_iface_combinations_dualmode[] = {
  66         { .num_different_channels = 1,
  67           .max_interfaces = 2,
  68           .beacon_int_infra_match = true,
  69           .limits = iwlagn_sta_ap_limits,
  70           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  71         },
  72         { .num_different_channels = 1,
  73           .max_interfaces = 2,
  74           .limits = iwlagn_2sta_limits,
  75           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  76         },
  77 };
  78 
  79 /*
  80  * Not a mac80211 entry point function, but it fits in with all the
  81  * other mac80211 functions grouped here.
  82  */
  83 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  84                               const struct iwl_ucode_capabilities *capa)
  85 {
  86         int ret;
  87         struct ieee80211_hw *hw = priv->hw;
  88         struct iwl_rxon_context *ctx;
  89 
  90         hw->rate_control_algorithm = "iwl-agn-rs";
  91 
  92         /* Tell mac80211 our characteristics */
  93         ieee80211_hw_set(hw, SIGNAL_DBM);
  94         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
  95         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
  96         ieee80211_hw_set(hw, SPECTRUM_MGMT);
  97         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
  98         ieee80211_hw_set(hw, QUEUE_CONTROL);
  99         ieee80211_hw_set(hw, SUPPORTS_PS);
 100         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 101         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 102         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 103 
 104         if (priv->trans->max_skb_frags)
 105                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 106 
 107         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 108         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 109 
 110         /*
 111          * Including the following line will crash some AP's.  This
 112          * workaround removes the stimulus which causes the crash until
 113          * the AP software can be fixed.
 114         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 115          */
 116 
 117         if (priv->nvm_data->sku_cap_11n_enable)
 118                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 119                                        NL80211_FEATURE_STATIC_SMPS;
 120 
 121         /*
 122          * Enable 11w if advertised by firmware and software crypto
 123          * is not enabled (as the firmware will interpret some mgmt
 124          * packets, so enabling it with software crypto isn't safe)
 125          */
 126         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 127             !iwlwifi_mod_params.swcrypto)
 128                 ieee80211_hw_set(hw, MFP_CAPABLE);
 129 
 130         hw->sta_data_size = sizeof(struct iwl_station_priv);
 131         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 132 
 133         for_each_context(priv, ctx) {
 134                 hw->wiphy->interface_modes |= ctx->interface_modes;
 135                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 136         }
 137 
 138         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 139 
 140         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 141                 hw->wiphy->iface_combinations =
 142                         iwlagn_iface_combinations_dualmode;
 143                 hw->wiphy->n_iface_combinations =
 144                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 145         }
 146 
 147         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 148         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 149                                        REGULATORY_DISABLE_BEACON_HINTS;
 150 
 151 #ifdef CONFIG_PM_SLEEP
 152         if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
 153             priv->trans->ops->d3_suspend &&
 154             priv->trans->ops->d3_resume &&
 155             device_can_wakeup(priv->trans->dev)) {
 156                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 157                                              WIPHY_WOWLAN_DISCONNECT |
 158                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 159                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 160                 if (!iwlwifi_mod_params.swcrypto)
 161                         priv->wowlan_support.flags |=
 162                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 163                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 164 
 165                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 166                 priv->wowlan_support.pattern_min_len =
 167                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 168                 priv->wowlan_support.pattern_max_len =
 169                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 170                 hw->wiphy->wowlan = &priv->wowlan_support;
 171         }
 172 #endif
 173 
 174         if (iwlwifi_mod_params.power_save)
 175                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 176         else
 177                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 178 
 179         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 180         /* we create the 802.11 header and a max-length SSID element */
 181         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 182 
 183         /*
 184          * We don't use all queues: 4 and 9 are unused and any
 185          * aggregation queue gets mapped down to the AC queue.
 186          */
 187         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 188 
 189         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 190 
 191         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 192                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 193                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 194         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 195                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 196                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 197 
 198         hw->wiphy->hw_version = priv->trans->hw_id;
 199 
 200         iwl_leds_init(priv);
 201 
 202         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 203 
 204         ret = ieee80211_register_hw(priv->hw);
 205         if (ret) {
 206                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 207                 iwl_leds_exit(priv);
 208                 return ret;
 209         }
 210         priv->mac80211_registered = 1;
 211 
 212         return 0;
 213 }
 214 
 215 void iwlagn_mac_unregister(struct iwl_priv *priv)
 216 {
 217         if (!priv->mac80211_registered)
 218                 return;
 219         iwl_leds_exit(priv);
 220         ieee80211_unregister_hw(priv->hw);
 221         priv->mac80211_registered = 0;
 222 }
 223 
 224 static int __iwl_up(struct iwl_priv *priv)
 225 {
 226         struct iwl_rxon_context *ctx;
 227         int ret;
 228 
 229         lockdep_assert_held(&priv->mutex);
 230 
 231         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 232                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 233                 return -EIO;
 234         }
 235 
 236         for_each_context(priv, ctx) {
 237                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 238                 if (ret) {
 239                         iwl_dealloc_bcast_stations(priv);
 240                         return ret;
 241                 }
 242         }
 243 
 244         ret = iwl_trans_start_hw(priv->trans);
 245         if (ret) {
 246                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 247                 goto error;
 248         }
 249 
 250         ret = iwl_run_init_ucode(priv);
 251         if (ret) {
 252                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 253                 goto error;
 254         }
 255 
 256         ret = iwl_trans_start_hw(priv->trans);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 259                 goto error;
 260         }
 261 
 262         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 263         if (ret) {
 264                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 265                 goto error;
 266         }
 267 
 268         ret = iwl_alive_start(priv);
 269         if (ret)
 270                 goto error;
 271         return 0;
 272 
 273  error:
 274         set_bit(STATUS_EXIT_PENDING, &priv->status);
 275         iwl_down(priv);
 276         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 277 
 278         IWL_ERR(priv, "Unable to initialize device.\n");
 279         return ret;
 280 }
 281 
 282 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 283 {
 284         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 285         int ret;
 286 
 287         IWL_DEBUG_MAC80211(priv, "enter\n");
 288 
 289         /* we should be verifying the device is ready to be opened */
 290         mutex_lock(&priv->mutex);
 291         ret = __iwl_up(priv);
 292         mutex_unlock(&priv->mutex);
 293         if (ret)
 294                 return ret;
 295 
 296         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 297 
 298         /* Now we should be done, and the READY bit should be set. */
 299         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 300                 ret = -EIO;
 301 
 302         iwlagn_led_enable(priv);
 303 
 304         priv->is_open = 1;
 305         IWL_DEBUG_MAC80211(priv, "leave\n");
 306         return 0;
 307 }
 308 
 309 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 310 {
 311         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 312 
 313         IWL_DEBUG_MAC80211(priv, "enter\n");
 314 
 315         if (!priv->is_open)
 316                 return;
 317 
 318         priv->is_open = 0;
 319 
 320         mutex_lock(&priv->mutex);
 321         iwl_down(priv);
 322         mutex_unlock(&priv->mutex);
 323 
 324         iwl_cancel_deferred_work(priv);
 325 
 326         flush_workqueue(priv->workqueue);
 327 
 328         IWL_DEBUG_MAC80211(priv, "leave\n");
 329 }
 330 
 331 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 332                                       struct ieee80211_vif *vif,
 333                                       struct cfg80211_gtk_rekey_data *data)
 334 {
 335         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 336 
 337         if (iwlwifi_mod_params.swcrypto)
 338                 return;
 339 
 340         IWL_DEBUG_MAC80211(priv, "enter\n");
 341         mutex_lock(&priv->mutex);
 342 
 343         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 344                 goto out;
 345 
 346         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 347         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 348         priv->replay_ctr =
 349                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 350         priv->have_rekey_data = true;
 351 
 352  out:
 353         mutex_unlock(&priv->mutex);
 354         IWL_DEBUG_MAC80211(priv, "leave\n");
 355 }
 356 
 357 #ifdef CONFIG_PM_SLEEP
 358 
 359 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 360                               struct cfg80211_wowlan *wowlan)
 361 {
 362         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 363         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 364         int ret;
 365 
 366         if (WARN_ON(!wowlan))
 367                 return -EINVAL;
 368 
 369         IWL_DEBUG_MAC80211(priv, "enter\n");
 370         mutex_lock(&priv->mutex);
 371 
 372         /* Don't attempt WoWLAN when not associated, tear down instead. */
 373         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 374             !iwl_is_associated_ctx(ctx)) {
 375                 ret = 1;
 376                 goto out;
 377         }
 378 
 379         ret = iwlagn_suspend(priv, wowlan);
 380         if (ret)
 381                 goto error;
 382 
 383         /* let the ucode operate on its own */
 384         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 385                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 386 
 387         iwl_trans_d3_suspend(priv->trans, false, true);
 388 
 389         goto out;
 390 
 391  error:
 392         priv->wowlan = false;
 393         iwlagn_prepare_restart(priv);
 394         ieee80211_restart_hw(priv->hw);
 395  out:
 396         mutex_unlock(&priv->mutex);
 397         IWL_DEBUG_MAC80211(priv, "leave\n");
 398 
 399         return ret;
 400 }
 401 
 402 struct iwl_resume_data {
 403         struct iwl_priv *priv;
 404         struct iwlagn_wowlan_status *cmd;
 405         bool valid;
 406 };
 407 
 408 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 409                                  struct iwl_rx_packet *pkt, void *data)
 410 {
 411         struct iwl_resume_data *resume_data = data;
 412         struct iwl_priv *priv = resume_data->priv;
 413 
 414         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 415                 IWL_ERR(priv, "rx wrong size data\n");
 416                 return true;
 417         }
 418         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 419         resume_data->valid = true;
 420 
 421         return true;
 422 }
 423 
 424 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 425 {
 426         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 427         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 428         struct ieee80211_vif *vif;
 429         u32 base;
 430         int ret;
 431         enum iwl_d3_status d3_status;
 432         struct error_table_start {
 433                 /* cf. struct iwl_error_event_table */
 434                 u32 valid;
 435                 u32 error_id;
 436         } err_info;
 437         struct iwl_notification_wait status_wait;
 438         static const u16 status_cmd[] = {
 439                 REPLY_WOWLAN_GET_STATUS,
 440         };
 441         struct iwlagn_wowlan_status status_data = {};
 442         struct iwl_resume_data resume_data = {
 443                 .priv = priv,
 444                 .cmd = &status_data,
 445                 .valid = false,
 446         };
 447         struct cfg80211_wowlan_wakeup wakeup = {
 448                 .pattern_idx = -1,
 449         };
 450 #ifdef CONFIG_IWLWIFI_DEBUGFS
 451         const struct fw_img *img;
 452 #endif
 453 
 454         IWL_DEBUG_MAC80211(priv, "enter\n");
 455         mutex_lock(&priv->mutex);
 456 
 457         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 458         vif = ctx->vif;
 459 
 460         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
 461         if (ret)
 462                 goto out_unlock;
 463 
 464         if (d3_status != IWL_D3_STATUS_ALIVE) {
 465                 IWL_INFO(priv, "Device was reset during suspend\n");
 466                 goto out_unlock;
 467         }
 468 
 469         /* uCode is no longer operating by itself */
 470         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 471                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 472 
 473         base = priv->device_pointers.error_event_table;
 474         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 475                 IWL_WARN(priv, "Invalid error table during resume!\n");
 476                 goto out_unlock;
 477         }
 478 
 479         iwl_trans_read_mem_bytes(priv->trans, base,
 480                                  &err_info, sizeof(err_info));
 481 
 482         if (err_info.valid) {
 483                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 484                          err_info.valid, err_info.error_id);
 485                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 486                         wakeup.rfkill_release = true;
 487                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 488                                                        GFP_KERNEL);
 489                 }
 490                 goto out_unlock;
 491         }
 492 
 493 #ifdef CONFIG_IWLWIFI_DEBUGFS
 494         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 495         if (!priv->wowlan_sram)
 496                 priv->wowlan_sram =
 497                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 498                                 GFP_KERNEL);
 499 
 500         if (priv->wowlan_sram)
 501                 iwl_trans_read_mem(priv->trans, 0x800000,
 502                                    priv->wowlan_sram,
 503                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 504 #endif
 505 
 506         /*
 507          * This is very strange. The GET_STATUS command is sent but the device
 508          * doesn't reply properly, it seems it doesn't close the RBD so one is
 509          * always left open ... As a result, we need to send another command
 510          * and have to reset the driver afterwards. As we need to switch to
 511          * runtime firmware again that'll happen.
 512          */
 513 
 514         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 515                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 516                                    &resume_data);
 517 
 518         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 519         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 520         /* an RBD is left open in the firmware now! */
 521 
 522         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 523         if (ret)
 524                 goto out_unlock;
 525 
 526         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 527                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 528                 struct cfg80211_wowlan_wakeup *wakeup_report;
 529 
 530                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 531 
 532                 if (reasons) {
 533                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 534                                 wakeup.magic_pkt = true;
 535                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 536                                 wakeup.pattern_idx = status_data.pattern_number;
 537                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 538                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 539                                 wakeup.disconnect = true;
 540                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 541                                 wakeup.gtk_rekey_failure = true;
 542                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 543                                 wakeup.eap_identity_req = true;
 544                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 545                                 wakeup.four_way_handshake = true;
 546                         wakeup_report = &wakeup;
 547                 } else {
 548                         wakeup_report = NULL;
 549                 }
 550 
 551                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 552         }
 553 
 554         priv->wowlan = false;
 555 
 556         iwlagn_prepare_restart(priv);
 557 
 558         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 559         iwl_connection_init_rx_config(priv, ctx);
 560         iwlagn_set_rxon_chain(priv, ctx);
 561 
 562  out_unlock:
 563         mutex_unlock(&priv->mutex);
 564         IWL_DEBUG_MAC80211(priv, "leave\n");
 565 
 566         ieee80211_resume_disconnect(vif);
 567 
 568         return 1;
 569 }
 570 
 571 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 572 {
 573         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 574 
 575         device_set_wakeup_enable(priv->trans->dev, enabled);
 576 }
 577 #endif
 578 
 579 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 580                           struct ieee80211_tx_control *control,
 581                           struct sk_buff *skb)
 582 {
 583         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 584 
 585         if (iwlagn_tx_skb(priv, control->sta, skb))
 586                 ieee80211_free_txskb(hw, skb);
 587 }
 588 
 589 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 590                                        struct ieee80211_vif *vif,
 591                                        struct ieee80211_key_conf *keyconf,
 592                                        struct ieee80211_sta *sta,
 593                                        u32 iv32, u16 *phase1key)
 594 {
 595         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 596 
 597         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 598 }
 599 
 600 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 601                               struct ieee80211_vif *vif,
 602                               struct ieee80211_sta *sta,
 603                               struct ieee80211_key_conf *key)
 604 {
 605         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 606         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 607         struct iwl_rxon_context *ctx = vif_priv->ctx;
 608         int ret;
 609         bool is_default_wep_key = false;
 610 
 611         IWL_DEBUG_MAC80211(priv, "enter\n");
 612 
 613         if (iwlwifi_mod_params.swcrypto) {
 614                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 615                 return -EOPNOTSUPP;
 616         }
 617 
 618         switch (key->cipher) {
 619         case WLAN_CIPHER_SUITE_TKIP:
 620                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 621                 /* fall through */
 622         case WLAN_CIPHER_SUITE_CCMP:
 623                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 624                 break;
 625         default:
 626                 break;
 627         }
 628 
 629         /*
 630          * We could program these keys into the hardware as well, but we
 631          * don't expect much multicast traffic in IBSS and having keys
 632          * for more stations is probably more useful.
 633          *
 634          * Mark key TX-only and return 0.
 635          */
 636         if (vif->type == NL80211_IFTYPE_ADHOC &&
 637             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 638                 key->hw_key_idx = WEP_INVALID_OFFSET;
 639                 return 0;
 640         }
 641 
 642         /* If they key was TX-only, accept deletion */
 643         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 644                 return 0;
 645 
 646         mutex_lock(&priv->mutex);
 647         iwl_scan_cancel_timeout(priv, 100);
 648 
 649         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 650 
 651         /*
 652          * If we are getting WEP group key and we didn't receive any key mapping
 653          * so far, we are in legacy wep mode (group key only), otherwise we are
 654          * in 1X mode.
 655          * In legacy wep mode, we use another host command to the uCode.
 656          */
 657         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 658              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 659                 if (cmd == SET_KEY)
 660                         is_default_wep_key = !ctx->key_mapping_keys;
 661                 else
 662                         is_default_wep_key =
 663                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 664         }
 665 
 666 
 667         switch (cmd) {
 668         case SET_KEY:
 669                 if (is_default_wep_key) {
 670                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 671                         break;
 672                 }
 673                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 674                 if (ret) {
 675                         /*
 676                          * can't add key for RX, but we don't need it
 677                          * in the device for TX so still return 0
 678                          */
 679                         ret = 0;
 680                         key->hw_key_idx = WEP_INVALID_OFFSET;
 681                 }
 682 
 683                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 684                 break;
 685         case DISABLE_KEY:
 686                 if (is_default_wep_key)
 687                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 688                 else
 689                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 690 
 691                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 692                 break;
 693         default:
 694                 ret = -EINVAL;
 695         }
 696 
 697         mutex_unlock(&priv->mutex);
 698         IWL_DEBUG_MAC80211(priv, "leave\n");
 699 
 700         return ret;
 701 }
 702 
 703 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 704                                    struct ieee80211_vif *vif,
 705                                    struct ieee80211_ampdu_params *params)
 706 {
 707         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 708         int ret = -EINVAL;
 709         struct ieee80211_sta *sta = params->sta;
 710         enum ieee80211_ampdu_mlme_action action = params->action;
 711         u16 tid = params->tid;
 712         u16 *ssn = &params->ssn;
 713         u8 buf_size = params->buf_size;
 714         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 715 
 716         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 717                      sta->addr, tid);
 718 
 719         if (!(priv->nvm_data->sku_cap_11n_enable))
 720                 return -EACCES;
 721 
 722         IWL_DEBUG_MAC80211(priv, "enter\n");
 723         mutex_lock(&priv->mutex);
 724 
 725         switch (action) {
 726         case IEEE80211_AMPDU_RX_START:
 727                 if (!iwl_enable_rx_ampdu())
 728                         break;
 729                 IWL_DEBUG_HT(priv, "start Rx\n");
 730                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 731                 break;
 732         case IEEE80211_AMPDU_RX_STOP:
 733                 IWL_DEBUG_HT(priv, "stop Rx\n");
 734                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 735                 break;
 736         case IEEE80211_AMPDU_TX_START:
 737                 if (!priv->trans->ops->txq_enable)
 738                         break;
 739                 if (!iwl_enable_tx_ampdu())
 740                         break;
 741                 IWL_DEBUG_HT(priv, "start Tx\n");
 742                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 743                 break;
 744         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 745         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 746                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 747                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 748                 break;
 749         case IEEE80211_AMPDU_TX_STOP_CONT:
 750                 IWL_DEBUG_HT(priv, "stop Tx\n");
 751                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 752                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 753                         priv->agg_tids_count--;
 754                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 755                                      priv->agg_tids_count);
 756                 }
 757                 if (!priv->agg_tids_count &&
 758                     priv->hw_params.use_rts_for_aggregation) {
 759                         /*
 760                          * switch off RTS/CTS if it was previously enabled
 761                          */
 762                         sta_priv->lq_sta.lq.general_params.flags &=
 763                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 764                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 765                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 766                 }
 767                 break;
 768         case IEEE80211_AMPDU_TX_OPERATIONAL:
 769                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 770                 break;
 771         }
 772         mutex_unlock(&priv->mutex);
 773         IWL_DEBUG_MAC80211(priv, "leave\n");
 774         return ret;
 775 }
 776 
 777 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 778                               struct ieee80211_vif *vif,
 779                               struct ieee80211_sta *sta)
 780 {
 781         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 782         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 783         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 784         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 785         int ret;
 786         u8 sta_id;
 787 
 788         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 789                         sta->addr);
 790         sta_priv->sta_id = IWL_INVALID_STATION;
 791 
 792         atomic_set(&sta_priv->pending_frames, 0);
 793         if (vif->type == NL80211_IFTYPE_AP)
 794                 sta_priv->client = true;
 795 
 796         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 797                                      is_ap, sta, &sta_id);
 798         if (ret) {
 799                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 800                         sta->addr, ret);
 801                 /* Should we return success if return code is EEXIST ? */
 802                 return ret;
 803         }
 804 
 805         sta_priv->sta_id = sta_id;
 806 
 807         return 0;
 808 }
 809 
 810 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 811                                  struct ieee80211_vif *vif,
 812                                  struct ieee80211_sta *sta)
 813 {
 814         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 815         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 816         int ret;
 817 
 818         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 819 
 820         if (vif->type == NL80211_IFTYPE_STATION) {
 821                 /*
 822                  * Station will be removed from device when the RXON
 823                  * is set to unassociated -- just deactivate it here
 824                  * to avoid re-programming it.
 825                  */
 826                 ret = 0;
 827                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 828         } else {
 829                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 830                 if (ret)
 831                         IWL_DEBUG_QUIET_RFKILL(priv,
 832                                 "Error removing station %pM\n", sta->addr);
 833         }
 834         return ret;
 835 }
 836 
 837 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 838                                 struct ieee80211_vif *vif,
 839                                 struct ieee80211_sta *sta,
 840                                 enum ieee80211_sta_state old_state,
 841                                 enum ieee80211_sta_state new_state)
 842 {
 843         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 844         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 845         enum {
 846                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 847         } op = NONE;
 848         int ret;
 849 
 850         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 851                            sta->addr, old_state, new_state);
 852 
 853         mutex_lock(&priv->mutex);
 854         if (vif->type == NL80211_IFTYPE_STATION) {
 855                 if (old_state == IEEE80211_STA_NOTEXIST &&
 856                     new_state == IEEE80211_STA_NONE)
 857                         op = ADD;
 858                 else if (old_state == IEEE80211_STA_NONE &&
 859                          new_state == IEEE80211_STA_NOTEXIST)
 860                         op = REMOVE;
 861                 else if (old_state == IEEE80211_STA_AUTH &&
 862                          new_state == IEEE80211_STA_ASSOC)
 863                         op = HT_RATE_INIT;
 864         } else {
 865                 if (old_state == IEEE80211_STA_AUTH &&
 866                     new_state == IEEE80211_STA_ASSOC)
 867                         op = ADD_RATE_INIT;
 868                 else if (old_state == IEEE80211_STA_ASSOC &&
 869                          new_state == IEEE80211_STA_AUTH)
 870                         op = REMOVE;
 871         }
 872 
 873         switch (op) {
 874         case ADD:
 875                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 876                 if (ret)
 877                         break;
 878                 /*
 879                  * Clear the in-progress flag, the AP station entry was added
 880                  * but we'll initialize LQ only when we've associated (which
 881                  * would also clear the in-progress flag). This is necessary
 882                  * in case we never initialize LQ because association fails.
 883                  */
 884                 spin_lock_bh(&priv->sta_lock);
 885                 priv->stations[iwl_sta_id(sta)].used &=
 886                         ~IWL_STA_UCODE_INPROGRESS;
 887                 spin_unlock_bh(&priv->sta_lock);
 888                 break;
 889         case REMOVE:
 890                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 891                 break;
 892         case ADD_RATE_INIT:
 893                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 894                 if (ret)
 895                         break;
 896                 /* Initialize rate scaling */
 897                 IWL_DEBUG_INFO(priv,
 898                                "Initializing rate scaling for station %pM\n",
 899                                sta->addr);
 900                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 901                 ret = 0;
 902                 break;
 903         case HT_RATE_INIT:
 904                 /* Initialize rate scaling */
 905                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 906                 if (ret)
 907                         break;
 908                 IWL_DEBUG_INFO(priv,
 909                                "Initializing rate scaling for station %pM\n",
 910                                sta->addr);
 911                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 912                 ret = 0;
 913                 break;
 914         default:
 915                 ret = 0;
 916                 break;
 917         }
 918 
 919         /*
 920          * mac80211 might WARN if we fail, but due the way we
 921          * (badly) handle hard rfkill, we might fail here
 922          */
 923         if (iwl_is_rfkill(priv))
 924                 ret = 0;
 925 
 926         mutex_unlock(&priv->mutex);
 927         IWL_DEBUG_MAC80211(priv, "leave\n");
 928 
 929         return ret;
 930 }
 931 
 932 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 933                                       struct ieee80211_vif *vif,
 934                                       struct ieee80211_channel_switch *ch_switch)
 935 {
 936         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 937         struct ieee80211_conf *conf = &hw->conf;
 938         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 939         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 940         /*
 941          * MULTI-FIXME
 942          * When we add support for multiple interfaces, we need to
 943          * revisit this. The channel switch command in the device
 944          * only affects the BSS context, but what does that really
 945          * mean? And what if we get a CSA on the second interface?
 946          * This needs a lot of work.
 947          */
 948         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 949         u16 ch;
 950 
 951         IWL_DEBUG_MAC80211(priv, "enter\n");
 952 
 953         mutex_lock(&priv->mutex);
 954 
 955         if (iwl_is_rfkill(priv))
 956                 goto out;
 957 
 958         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 959             test_bit(STATUS_SCANNING, &priv->status) ||
 960             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 961                 goto out;
 962 
 963         if (!iwl_is_associated_ctx(ctx))
 964                 goto out;
 965 
 966         if (!priv->lib->set_channel_switch)
 967                 goto out;
 968 
 969         ch = channel->hw_value;
 970         if (le16_to_cpu(ctx->active.channel) == ch)
 971                 goto out;
 972 
 973         priv->current_ht_config.smps = conf->smps_mode;
 974 
 975         /* Configure HT40 channels */
 976         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 977         case NL80211_CHAN_NO_HT:
 978         case NL80211_CHAN_HT20:
 979                 ctx->ht.is_40mhz = false;
 980                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 981                 break;
 982         case NL80211_CHAN_HT40MINUS:
 983                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 984                 ctx->ht.is_40mhz = true;
 985                 break;
 986         case NL80211_CHAN_HT40PLUS:
 987                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 988                 ctx->ht.is_40mhz = true;
 989                 break;
 990         }
 991 
 992         if ((le16_to_cpu(ctx->staging.channel) != ch))
 993                 ctx->staging.flags = 0;
 994 
 995         iwl_set_rxon_channel(priv, channel, ctx);
 996         iwl_set_rxon_ht(priv, ht_conf);
 997         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 998 
 999         /*
1000          * at this point, staging_rxon has the
1001          * configuration for channel switch
1002          */
1003         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1004         priv->switch_channel = cpu_to_le16(ch);
1005         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1006                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1007                 priv->switch_channel = 0;
1008                 ieee80211_chswitch_done(ctx->vif, false);
1009         }
1010 
1011 out:
1012         mutex_unlock(&priv->mutex);
1013         IWL_DEBUG_MAC80211(priv, "leave\n");
1014 }
1015 
1016 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1017 {
1018         /*
1019          * MULTI-FIXME
1020          * See iwlagn_mac_channel_switch.
1021          */
1022         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1023 
1024         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1025                 return;
1026 
1027         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1028                 return;
1029 
1030         if (ctx->vif)
1031                 ieee80211_chswitch_done(ctx->vif, is_success);
1032 }
1033 
1034 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1035                                     unsigned int changed_flags,
1036                                     unsigned int *total_flags,
1037                                     u64 multicast)
1038 {
1039         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1040         __le32 filter_or = 0, filter_nand = 0;
1041         struct iwl_rxon_context *ctx;
1042 
1043 #define CHK(test, flag) do { \
1044         if (*total_flags & (test))              \
1045                 filter_or |= (flag);            \
1046         else                                    \
1047                 filter_nand |= (flag);          \
1048         } while (0)
1049 
1050         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1051                         changed_flags, *total_flags);
1052 
1053         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1054         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1055         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1056         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1057 
1058 #undef CHK
1059 
1060         mutex_lock(&priv->mutex);
1061 
1062         for_each_context(priv, ctx) {
1063                 ctx->staging.filter_flags &= ~filter_nand;
1064                 ctx->staging.filter_flags |= filter_or;
1065 
1066                 /*
1067                  * Not committing directly because hardware can perform a scan,
1068                  * but we'll eventually commit the filter flags change anyway.
1069                  */
1070         }
1071 
1072         mutex_unlock(&priv->mutex);
1073 
1074         /*
1075          * Receiving all multicast frames is always enabled by the
1076          * default flags setup in iwl_connection_init_rx_config()
1077          * since we currently do not support programming multicast
1078          * filters into the device.
1079          */
1080         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1081                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1082 }
1083 
1084 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1085                              u32 queues, bool drop)
1086 {
1087         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1088         u32 scd_queues;
1089 
1090         mutex_lock(&priv->mutex);
1091         IWL_DEBUG_MAC80211(priv, "enter\n");
1092 
1093         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1094                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1095                 goto done;
1096         }
1097         if (iwl_is_rfkill(priv)) {
1098                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1099                 goto done;
1100         }
1101 
1102         scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1103         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1104                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1105 
1106         if (drop) {
1107                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1108                                     scd_queues);
1109                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1110                         IWL_ERR(priv, "flush request fail\n");
1111                         goto done;
1112                 }
1113         }
1114 
1115         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1116         iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1117 done:
1118         mutex_unlock(&priv->mutex);
1119         IWL_DEBUG_MAC80211(priv, "leave\n");
1120 }
1121 
1122 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1123                                       struct ieee80211_vif *vif,
1124                                       const struct ieee80211_event *event)
1125 {
1126         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1127 
1128         if (event->type != RSSI_EVENT)
1129                 return;
1130 
1131         IWL_DEBUG_MAC80211(priv, "enter\n");
1132 
1133         if (priv->lib->bt_params &&
1134             priv->lib->bt_params->advanced_bt_coexist) {
1135                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1136                         priv->bt_enable_pspoll = true;
1137                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1138                         priv->bt_enable_pspoll = false;
1139 
1140                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1141         } else {
1142                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1143                                 "ignoring RSSI callback\n");
1144         }
1145 
1146         IWL_DEBUG_MAC80211(priv, "leave\n");
1147 }
1148 
1149 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1150                               struct ieee80211_sta *sta, bool set)
1151 {
1152         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1153 
1154         queue_work(priv->workqueue, &priv->beacon_update);
1155 
1156         return 0;
1157 }
1158 
1159 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1160                               struct ieee80211_vif *vif, u16 queue,
1161                               const struct ieee80211_tx_queue_params *params)
1162 {
1163         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1164         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1165         struct iwl_rxon_context *ctx = vif_priv->ctx;
1166         int q;
1167 
1168         if (WARN_ON(!ctx))
1169                 return -EINVAL;
1170 
1171         IWL_DEBUG_MAC80211(priv, "enter\n");
1172 
1173         if (!iwl_is_ready_rf(priv)) {
1174                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1175                 return -EIO;
1176         }
1177 
1178         if (queue >= AC_NUM) {
1179                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1180                 return 0;
1181         }
1182 
1183         q = AC_NUM - 1 - queue;
1184 
1185         mutex_lock(&priv->mutex);
1186 
1187         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1188                 cpu_to_le16(params->cw_min);
1189         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1190                 cpu_to_le16(params->cw_max);
1191         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1192         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1193                         cpu_to_le16((params->txop * 32));
1194 
1195         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1196 
1197         mutex_unlock(&priv->mutex);
1198 
1199         IWL_DEBUG_MAC80211(priv, "leave\n");
1200         return 0;
1201 }
1202 
1203 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1204 {
1205         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1206 
1207         return priv->ibss_manager == IWL_IBSS_MANAGER;
1208 }
1209 
1210 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1211 {
1212         iwl_connection_init_rx_config(priv, ctx);
1213 
1214         iwlagn_set_rxon_chain(priv, ctx);
1215 
1216         return iwlagn_commit_rxon(priv, ctx);
1217 }
1218 
1219 static int iwl_setup_interface(struct iwl_priv *priv,
1220                                struct iwl_rxon_context *ctx)
1221 {
1222         struct ieee80211_vif *vif = ctx->vif;
1223         int err, ac;
1224 
1225         lockdep_assert_held(&priv->mutex);
1226 
1227         /*
1228          * This variable will be correct only when there's just
1229          * a single context, but all code using it is for hardware
1230          * that supports only one context.
1231          */
1232         priv->iw_mode = vif->type;
1233 
1234         ctx->is_active = true;
1235 
1236         err = iwl_set_mode(priv, ctx);
1237         if (err) {
1238                 if (!ctx->always_active)
1239                         ctx->is_active = false;
1240                 return err;
1241         }
1242 
1243         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1244             vif->type == NL80211_IFTYPE_ADHOC) {
1245                 /*
1246                  * pretend to have high BT traffic as long as we
1247                  * are operating in IBSS mode, as this will cause
1248                  * the rate scaling etc. to behave as intended.
1249                  */
1250                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1251         }
1252 
1253         /* set up queue mappings */
1254         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1255                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1256 
1257         if (vif->type == NL80211_IFTYPE_AP)
1258                 vif->cab_queue = ctx->mcast_queue;
1259         else
1260                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1261 
1262         return 0;
1263 }
1264 
1265 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1266                                     struct ieee80211_vif *vif)
1267 {
1268         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1269         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1270         struct iwl_rxon_context *tmp, *ctx = NULL;
1271         int err;
1272         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1273         bool reset = false;
1274 
1275         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1276                            viftype, vif->addr);
1277 
1278         mutex_lock(&priv->mutex);
1279 
1280         if (!iwl_is_ready_rf(priv)) {
1281                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1282                 err = -EINVAL;
1283                 goto out;
1284         }
1285 
1286         for_each_context(priv, tmp) {
1287                 u32 possible_modes =
1288                         tmp->interface_modes | tmp->exclusive_interface_modes;
1289 
1290                 if (tmp->vif) {
1291                         /* On reset we need to add the same interface again */
1292                         if (tmp->vif == vif) {
1293                                 reset = true;
1294                                 ctx = tmp;
1295                                 break;
1296                         }
1297 
1298                         /* check if this busy context is exclusive */
1299                         if (tmp->exclusive_interface_modes &
1300                                                 BIT(tmp->vif->type)) {
1301                                 err = -EINVAL;
1302                                 goto out;
1303                         }
1304                         continue;
1305                 }
1306 
1307                 if (!(possible_modes & BIT(viftype)))
1308                         continue;
1309 
1310                 /* have maybe usable context w/o interface */
1311                 ctx = tmp;
1312                 break;
1313         }
1314 
1315         if (!ctx) {
1316                 err = -EOPNOTSUPP;
1317                 goto out;
1318         }
1319 
1320         vif_priv->ctx = ctx;
1321         ctx->vif = vif;
1322 
1323         /*
1324          * In SNIFFER device type, the firmware reports the FCS to
1325          * the host, rather than snipping it off. Unfortunately,
1326          * mac80211 doesn't (yet) provide a per-packet flag for
1327          * this, so that we have to set the hardware flag based
1328          * on the interfaces added. As the monitor interface can
1329          * only be present by itself, and will be removed before
1330          * other interfaces are added, this is safe.
1331          */
1332         if (vif->type == NL80211_IFTYPE_MONITOR)
1333                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1334         else
1335                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1336 
1337         err = iwl_setup_interface(priv, ctx);
1338         if (!err || reset)
1339                 goto out;
1340 
1341         ctx->vif = NULL;
1342         priv->iw_mode = NL80211_IFTYPE_STATION;
1343  out:
1344         mutex_unlock(&priv->mutex);
1345 
1346         IWL_DEBUG_MAC80211(priv, "leave\n");
1347         return err;
1348 }
1349 
1350 static void iwl_teardown_interface(struct iwl_priv *priv,
1351                                    struct ieee80211_vif *vif,
1352                                    bool mode_change)
1353 {
1354         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1355 
1356         lockdep_assert_held(&priv->mutex);
1357 
1358         if (priv->scan_vif == vif) {
1359                 iwl_scan_cancel_timeout(priv, 200);
1360                 iwl_force_scan_end(priv);
1361         }
1362 
1363         if (!mode_change) {
1364                 iwl_set_mode(priv, ctx);
1365                 if (!ctx->always_active)
1366                         ctx->is_active = false;
1367         }
1368 
1369         /*
1370          * When removing the IBSS interface, overwrite the
1371          * BT traffic load with the stored one from the last
1372          * notification, if any. If this is a device that
1373          * doesn't implement this, this has no effect since
1374          * both values are the same and zero.
1375          */
1376         if (vif->type == NL80211_IFTYPE_ADHOC)
1377                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1378 }
1379 
1380 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1381                               struct ieee80211_vif *vif)
1382 {
1383         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1384         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1385 
1386         IWL_DEBUG_MAC80211(priv, "enter\n");
1387 
1388         mutex_lock(&priv->mutex);
1389 
1390         WARN_ON(ctx->vif != vif);
1391         ctx->vif = NULL;
1392 
1393         iwl_teardown_interface(priv, vif, false);
1394 
1395         mutex_unlock(&priv->mutex);
1396 
1397         IWL_DEBUG_MAC80211(priv, "leave\n");
1398 
1399 }
1400 
1401 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1402                                        struct ieee80211_vif *vif,
1403                                        enum nl80211_iftype newtype, bool newp2p)
1404 {
1405         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1406         struct iwl_rxon_context *ctx, *tmp;
1407         enum nl80211_iftype newviftype = newtype;
1408         u32 interface_modes;
1409         int err;
1410 
1411         IWL_DEBUG_MAC80211(priv, "enter\n");
1412 
1413         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1414 
1415         mutex_lock(&priv->mutex);
1416 
1417         ctx = iwl_rxon_ctx_from_vif(vif);
1418 
1419         /*
1420          * To simplify this code, only support changes on the
1421          * BSS context. The PAN context is usually reassigned
1422          * by creating/removing P2P interfaces anyway.
1423          */
1424         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1425                 err = -EBUSY;
1426                 goto out;
1427         }
1428 
1429         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1430                 /*
1431                  * Huh? But wait ... this can maybe happen when
1432                  * we're in the middle of a firmware restart!
1433                  */
1434                 err = -EBUSY;
1435                 goto out;
1436         }
1437 
1438         /* Check if the switch is supported in the same context */
1439         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1440         if (!(interface_modes & BIT(newtype))) {
1441                 err = -EBUSY;
1442                 goto out;
1443         }
1444 
1445         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1446                 for_each_context(priv, tmp) {
1447                         if (ctx == tmp)
1448                                 continue;
1449 
1450                         if (!tmp->is_active)
1451                                 continue;
1452 
1453                         /*
1454                          * The current mode switch would be exclusive, but
1455                          * another context is active ... refuse the switch.
1456                          */
1457                         err = -EBUSY;
1458                         goto out;
1459                 }
1460         }
1461 
1462         /* success */
1463         iwl_teardown_interface(priv, vif, true);
1464         vif->type = newviftype;
1465         vif->p2p = newp2p;
1466         err = iwl_setup_interface(priv, ctx);
1467         WARN_ON(err);
1468         /*
1469          * We've switched internally, but submitting to the
1470          * device may have failed for some reason. Mask this
1471          * error, because otherwise mac80211 will not switch
1472          * (and set the interface type back) and we'll be
1473          * out of sync with it.
1474          */
1475         err = 0;
1476 
1477  out:
1478         mutex_unlock(&priv->mutex);
1479         IWL_DEBUG_MAC80211(priv, "leave\n");
1480 
1481         return err;
1482 }
1483 
1484 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1485                               struct ieee80211_vif *vif,
1486                               struct ieee80211_scan_request *hw_req)
1487 {
1488         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1489         struct cfg80211_scan_request *req = &hw_req->req;
1490         int ret;
1491 
1492         IWL_DEBUG_MAC80211(priv, "enter\n");
1493 
1494         if (req->n_channels == 0)
1495                 return -EINVAL;
1496 
1497         mutex_lock(&priv->mutex);
1498 
1499         /*
1500          * If an internal scan is in progress, just set
1501          * up the scan_request as per above.
1502          */
1503         if (priv->scan_type != IWL_SCAN_NORMAL) {
1504                 IWL_DEBUG_SCAN(priv,
1505                                "SCAN request during internal scan - defer\n");
1506                 priv->scan_request = req;
1507                 priv->scan_vif = vif;
1508                 ret = 0;
1509         } else {
1510                 priv->scan_request = req;
1511                 priv->scan_vif = vif;
1512                 /*
1513                  * mac80211 will only ask for one band at a time
1514                  * so using channels[0] here is ok
1515                  */
1516                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1517                                         req->channels[0]->band);
1518                 if (ret) {
1519                         priv->scan_request = NULL;
1520                         priv->scan_vif = NULL;
1521                 }
1522         }
1523 
1524         IWL_DEBUG_MAC80211(priv, "leave\n");
1525 
1526         mutex_unlock(&priv->mutex);
1527 
1528         return ret;
1529 }
1530 
1531 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1532 {
1533         struct iwl_addsta_cmd cmd = {
1534                 .mode = STA_CONTROL_MODIFY_MSK,
1535                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1536                 .sta.sta_id = sta_id,
1537         };
1538 
1539         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1540 }
1541 
1542 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1543                                   struct ieee80211_vif *vif,
1544                                   enum sta_notify_cmd cmd,
1545                                   struct ieee80211_sta *sta)
1546 {
1547         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1548         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1549         int sta_id;
1550 
1551         IWL_DEBUG_MAC80211(priv, "enter\n");
1552 
1553         switch (cmd) {
1554         case STA_NOTIFY_SLEEP:
1555                 WARN_ON(!sta_priv->client);
1556                 sta_priv->asleep = true;
1557                 if (atomic_read(&sta_priv->pending_frames) > 0)
1558                         ieee80211_sta_block_awake(hw, sta, true);
1559                 break;
1560         case STA_NOTIFY_AWAKE:
1561                 WARN_ON(!sta_priv->client);
1562                 if (!sta_priv->asleep)
1563                         break;
1564                 sta_priv->asleep = false;
1565                 sta_id = iwl_sta_id(sta);
1566                 if (sta_id != IWL_INVALID_STATION)
1567                         iwl_sta_modify_ps_wake(priv, sta_id);
1568                 break;
1569         default:
1570                 break;
1571         }
1572         IWL_DEBUG_MAC80211(priv, "leave\n");
1573 }
1574 
1575 const struct ieee80211_ops iwlagn_hw_ops = {
1576         .tx = iwlagn_mac_tx,
1577         .start = iwlagn_mac_start,
1578         .stop = iwlagn_mac_stop,
1579 #ifdef CONFIG_PM_SLEEP
1580         .suspend = iwlagn_mac_suspend,
1581         .resume = iwlagn_mac_resume,
1582         .set_wakeup = iwlagn_mac_set_wakeup,
1583 #endif
1584         .add_interface = iwlagn_mac_add_interface,
1585         .remove_interface = iwlagn_mac_remove_interface,
1586         .change_interface = iwlagn_mac_change_interface,
1587         .config = iwlagn_mac_config,
1588         .configure_filter = iwlagn_configure_filter,
1589         .set_key = iwlagn_mac_set_key,
1590         .update_tkip_key = iwlagn_mac_update_tkip_key,
1591         .set_rekey_data = iwlagn_mac_set_rekey_data,
1592         .conf_tx = iwlagn_mac_conf_tx,
1593         .bss_info_changed = iwlagn_bss_info_changed,
1594         .ampdu_action = iwlagn_mac_ampdu_action,
1595         .hw_scan = iwlagn_mac_hw_scan,
1596         .sta_notify = iwlagn_mac_sta_notify,
1597         .sta_state = iwlagn_mac_sta_state,
1598         .channel_switch = iwlagn_mac_channel_switch,
1599         .flush = iwlagn_mac_flush,
1600         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1601         .event_callback = iwlagn_mac_event_callback,
1602         .set_tim = iwlagn_mac_set_tim,
1603 };
1604 
1605 /* This function both allocates and initializes hw and priv. */
1606 struct ieee80211_hw *iwl_alloc_all(void)
1607 {
1608         struct iwl_priv *priv;
1609         struct iwl_op_mode *op_mode;
1610         /* mac80211 allocates memory for this device instance, including
1611          *   space for this driver's private structure */
1612         struct ieee80211_hw *hw;
1613 
1614         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1615                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1616         if (!hw)
1617                 goto out;
1618 
1619         op_mode = hw->priv;
1620         priv = IWL_OP_MODE_GET_DVM(op_mode);
1621         priv->hw = hw;
1622 
1623 out:
1624         return hw;
1625 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c

DEFINITIONS
