drivers/net/wireless/cw1200/sta.c

   1 /*
   2  * Mac80211 STA API for ST-Ericsson CW1200 drivers
   3  *
   4  * Copyright (c) 2010, ST-Ericsson
   5  * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/vmalloc.h>
  13 #include <linux/sched.h>
  14 #include <linux/firmware.h>
  15 #include <linux/module.h>
  16 #include <linux/etherdevice.h>
  17
  18 #include "cw1200.h"
  19 #include "sta.h"
  20 #include "fwio.h"
  21 #include "bh.h"
  22 #include "debug.h"
  23
  24 #ifndef ERP_INFO_BYTE_OFFSET
  25 #define ERP_INFO_BYTE_OFFSET 2
  26 #endif
  27
  28 static void cw1200_do_join(struct cw1200_common *priv);
  29 static void cw1200_do_unjoin(struct cw1200_common *priv);
  30
  31 static int cw1200_upload_beacon(struct cw1200_common *priv);
  32 static int cw1200_upload_pspoll(struct cw1200_common *priv);
  33 static int cw1200_upload_null(struct cw1200_common *priv);
  34 static int cw1200_upload_qosnull(struct cw1200_common *priv);
  35 static int cw1200_start_ap(struct cw1200_common *priv);
  36 static int cw1200_update_beaconing(struct cw1200_common *priv);
  37 static int cw1200_enable_beaconing(struct cw1200_common *priv,
  38                                    bool enable);
  39 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
  40                                 struct ieee80211_vif *vif,
  41                                 enum sta_notify_cmd notify_cmd,
  42                                 int link_id);
  43 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
  44
  45 static inline void __cw1200_free_event_queue(struct list_head *list)
  46 {
  47         struct cw1200_wsm_event *event, *tmp;
  48         list_for_each_entry_safe(event, tmp, list, link) {
  49                 list_del(&event->link);
  50                 kfree(event);
  51         }
  52 }
  53
  54 /* ******************************************************************** */
  55 /* STA API                                                              */
  56
  57 int cw1200_start(struct ieee80211_hw *dev)
  58 {
  59         struct cw1200_common *priv = dev->priv;
  60         int ret = 0;
  61
  62         cw1200_pm_stay_awake(&priv->pm_state, HZ);
  63
  64         mutex_lock(&priv->conf_mutex);
  65
  66         /* default EDCA */
  67         WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
  68         WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
  69         WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
  70         WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
  71         ret = wsm_set_edca_params(priv, &priv->edca);
  72         if (ret)
  73                 goto out;
  74
  75         ret = cw1200_set_uapsd_param(priv, &priv->edca);
  76         if (ret)
  77                 goto out;
  78
  79         priv->setbssparams_done = false;
  80
  81         memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
  82         priv->mode = NL80211_IFTYPE_MONITOR;
  83         priv->wep_default_key_id = -1;
  84
  85         priv->cqm_beacon_loss_count = 10;
  86
  87         ret = cw1200_setup_mac(priv);
  88         if (ret)
  89                 goto out;
  90
  91 out:
  92         mutex_unlock(&priv->conf_mutex);
  93         return ret;
  94 }
  95
  96 void cw1200_stop(struct ieee80211_hw *dev)
  97 {
  98         struct cw1200_common *priv = dev->priv;
  99         LIST_HEAD(list);
 100         int i;
 101
 102         wsm_lock_tx(priv);
 103
 104         while (down_trylock(&priv->scan.lock)) {
 105                 /* Scan is in progress. Force it to stop. */
 106                 priv->scan.req = NULL;
 107                 schedule();
 108         }
 109         up(&priv->scan.lock);
 110
 111         cancel_delayed_work_sync(&priv->scan.probe_work);
 112         cancel_delayed_work_sync(&priv->scan.timeout);
 113         cancel_delayed_work_sync(&priv->clear_recent_scan_work);
 114         cancel_delayed_work_sync(&priv->join_timeout);
 115         cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
 116         cancel_work_sync(&priv->unjoin_work);
 117         cancel_delayed_work_sync(&priv->link_id_gc_work);
 118         flush_workqueue(priv->workqueue);
 119         del_timer_sync(&priv->mcast_timeout);
 120         mutex_lock(&priv->conf_mutex);
 121         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
 122         priv->listening = false;
 123
 124         spin_lock(&priv->event_queue_lock);
 125         list_splice_init(&priv->event_queue, &list);
 126         spin_unlock(&priv->event_queue_lock);
 127         __cw1200_free_event_queue(&list);
 128
 129
 130         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 131         priv->join_pending = false;
 132
 133         for (i = 0; i < 4; i++)
 134                 cw1200_queue_clear(&priv->tx_queue[i]);
 135         mutex_unlock(&priv->conf_mutex);
 136         tx_policy_clean(priv);
 137
 138         /* HACK! */
 139         if (atomic_xchg(&priv->tx_lock, 1) != 1)
 140                 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
 141
 142         wsm_unlock_tx(priv);
 143         atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
 144 }
 145
 146 static int cw1200_bssloss_mitigation = 1;
 147 module_param(cw1200_bssloss_mitigation, int, 0644);
 148 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
 149
 150
 151 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
 152                              int init, int good, int bad)
 153 {
 154         int tx = 0;
 155
 156         priv->delayed_link_loss = 0;
 157         cancel_work_sync(&priv->bss_params_work);
 158
 159         pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
 160                  priv->bss_loss_state,
 161                  init, good, bad,
 162                  atomic_read(&priv->tx_lock),
 163                  priv->delayed_unjoin);
 164
 165         /* If we have a pending unjoin */
 166         if (priv->delayed_unjoin)
 167                 return;
 168
 169         if (init) {
 170                 queue_delayed_work(priv->workqueue,
 171                                    &priv->bss_loss_work,
 172                                    HZ);
 173                 priv->bss_loss_state = 0;
 174
 175                 /* Skip the confimration procedure in P2P case */
 176                 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
 177                         tx = 1;
 178         } else if (good) {
 179                 cancel_delayed_work_sync(&priv->bss_loss_work);
 180                 priv->bss_loss_state = 0;
 181                 queue_work(priv->workqueue, &priv->bss_params_work);
 182         } else if (bad) {
 183                 /* XXX Should we just keep going until we time out? */
 184                 if (priv->bss_loss_state < 3)
 185                         tx = 1;
 186         } else {
 187                 cancel_delayed_work_sync(&priv->bss_loss_work);
 188                 priv->bss_loss_state = 0;
 189         }
 190
 191         /* Bypass mitigation if it's disabled */
 192         if (!cw1200_bssloss_mitigation)
 193                 tx = 0;
 194
 195         /* Spit out a NULL packet to our AP if necessary */
 196         if (tx) {
 197                 struct sk_buff *skb;
 198
 199                 priv->bss_loss_state++;
 200
 201                 skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
 202                 WARN_ON(!skb);
 203                 if (skb)
 204                         cw1200_tx(priv->hw, NULL, skb);
 205         }
 206 }
 207
 208 int cw1200_add_interface(struct ieee80211_hw *dev,
 209                          struct ieee80211_vif *vif)
 210 {
 211         int ret;
 212         struct cw1200_common *priv = dev->priv;
 213         /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
 214
 215         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 216                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 217
 218         mutex_lock(&priv->conf_mutex);
 219
 220         if (priv->mode != NL80211_IFTYPE_MONITOR) {
 221                 mutex_unlock(&priv->conf_mutex);
 222                 return -EOPNOTSUPP;
 223         }
 224
 225         switch (vif->type) {
 226         case NL80211_IFTYPE_STATION:
 227         case NL80211_IFTYPE_ADHOC:
 228         case NL80211_IFTYPE_MESH_POINT:
 229         case NL80211_IFTYPE_AP:
 230                 priv->mode = vif->type;
 231                 break;
 232         default:
 233                 mutex_unlock(&priv->conf_mutex);
 234                 return -EOPNOTSUPP;
 235         }
 236
 237         priv->vif = vif;
 238         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
 239         ret = cw1200_setup_mac(priv);
 240         /* Enable auto-calibration */
 241         /* Exception in subsequent channel switch; disabled.
 242          *  wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
 243          *      &auto_calibration_mode, sizeof(auto_calibration_mode));
 244         */
 245
 246         mutex_unlock(&priv->conf_mutex);
 247         return ret;
 248 }
 249
 250 void cw1200_remove_interface(struct ieee80211_hw *dev,
 251                              struct ieee80211_vif *vif)
 252 {
 253         struct cw1200_common *priv = dev->priv;
 254         struct wsm_reset reset = {
 255                 .reset_statistics = true,
 256         };
 257         int i;
 258
 259         mutex_lock(&priv->conf_mutex);
 260         switch (priv->join_status) {
 261         case CW1200_JOIN_STATUS_JOINING:
 262         case CW1200_JOIN_STATUS_PRE_STA:
 263         case CW1200_JOIN_STATUS_STA:
 264         case CW1200_JOIN_STATUS_IBSS:
 265                 wsm_lock_tx(priv);
 266                 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
 267                         wsm_unlock_tx(priv);
 268                 break;
 269         case CW1200_JOIN_STATUS_AP:
 270                 for (i = 0; priv->link_id_map; ++i) {
 271                         if (priv->link_id_map & BIT(i)) {
 272                                 reset.link_id = i;
 273                                 wsm_reset(priv, &reset);
 274                                 priv->link_id_map &= ~BIT(i);
 275                         }
 276                 }
 277                 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
 278                 priv->sta_asleep_mask = 0;
 279                 priv->enable_beacon = false;
 280                 priv->tx_multicast = false;
 281                 priv->aid0_bit_set = false;
 282                 priv->buffered_multicasts = false;
 283                 priv->pspoll_mask = 0;
 284                 reset.link_id = 0;
 285                 wsm_reset(priv, &reset);
 286                 break;
 287         case CW1200_JOIN_STATUS_MONITOR:
 288                 cw1200_update_listening(priv, false);
 289                 break;
 290         default:
 291                 break;
 292         }
 293         priv->vif = NULL;
 294         priv->mode = NL80211_IFTYPE_MONITOR;
 295         memset(priv->mac_addr, 0, ETH_ALEN);
 296         memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
 297         cw1200_free_keys(priv);
 298         cw1200_setup_mac(priv);
 299         priv->listening = false;
 300         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 301         if (!__cw1200_flush(priv, true))
 302                 wsm_unlock_tx(priv);
 303
 304         mutex_unlock(&priv->conf_mutex);
 305 }
 306
 307 int cw1200_change_interface(struct ieee80211_hw *dev,
 308                             struct ieee80211_vif *vif,
 309                             enum nl80211_iftype new_type,
 310                             bool p2p)
 311 {
 312         int ret = 0;
 313         pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
 314                  p2p, vif->type, vif->p2p);
 315
 316         if (new_type != vif->type || vif->p2p != p2p) {
 317                 cw1200_remove_interface(dev, vif);
 318                 vif->type = new_type;
 319                 vif->p2p = p2p;
 320                 ret = cw1200_add_interface(dev, vif);
 321         }
 322
 323         return ret;
 324 }
 325
 326 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
 327 {
 328         int ret = 0;
 329         struct cw1200_common *priv = dev->priv;
 330         struct ieee80211_conf *conf = &dev->conf;
 331
 332         pr_debug("CONFIG CHANGED:  %08x\n", changed);
 333
 334         down(&priv->scan.lock);
 335         mutex_lock(&priv->conf_mutex);
 336         /* TODO: IEEE80211_CONF_CHANGE_QOS */
 337         /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
 338
 339         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 340                 priv->output_power = conf->power_level;
 341                 pr_debug("[STA] TX power: %d\n", priv->output_power);
 342                 wsm_set_output_power(priv, priv->output_power * 10);
 343         }
 344
 345         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
 346             (priv->channel != conf->chandef.chan)) {
 347                 struct ieee80211_channel *ch = conf->chandef.chan;
 348                 struct wsm_switch_channel channel = {
 349                         .channel_number = ch->hw_value,
 350                 };
 351                 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
 352                          ch->center_freq, ch->hw_value);
 353
 354                 /* __cw1200_flush() implicitly locks tx, if successful */
 355                 if (!__cw1200_flush(priv, false)) {
 356                         if (!wsm_switch_channel(priv, &channel)) {
 357                                 ret = wait_event_timeout(priv->channel_switch_done,
 358                                                          !priv->channel_switch_in_progress,
 359                                                          3 * HZ);
 360                                 if (ret) {
 361                                         /* Already unlocks if successful */
 362                                         priv->channel = ch;
 363                                         ret = 0;
 364                                 } else {
 365                                         ret = -ETIMEDOUT;
 366                                 }
 367                         } else {
 368                                 /* Unlock if switch channel fails */
 369                                 wsm_unlock_tx(priv);
 370                         }
 371                 }
 372         }
 373
 374         if (changed & IEEE80211_CONF_CHANGE_PS) {
 375                 if (!(conf->flags & IEEE80211_CONF_PS))
 376                         priv->powersave_mode.mode = WSM_PSM_ACTIVE;
 377                 else if (conf->dynamic_ps_timeout <= 0)
 378                         priv->powersave_mode.mode = WSM_PSM_PS;
 379                 else
 380                         priv->powersave_mode.mode = WSM_PSM_FAST_PS;
 381
 382                 /* Firmware requires that value for this 1-byte field must
 383                  * be specified in units of 500us. Values above the 128ms
 384                  * threshold are not supported.
 385                  */
 386                 if (conf->dynamic_ps_timeout >= 0x80)
 387                         priv->powersave_mode.fast_psm_idle_period = 0xFF;
 388                 else
 389                         priv->powersave_mode.fast_psm_idle_period =
 390                                         conf->dynamic_ps_timeout << 1;
 391
 392                 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
 393                     priv->bss_params.aid)
 394                         cw1200_set_pm(priv, &priv->powersave_mode);
 395         }
 396
 397         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 398                 /* TBD: It looks like it's transparent
 399                  * there's a monitor interface present -- use this
 400                  * to determine for example whether to calculate
 401                  * timestamps for packets or not, do not use instead
 402                  * of filter flags!
 403                  */
 404         }
 405
 406         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 407                 struct wsm_operational_mode mode = {
 408                         .power_mode = cw1200_power_mode,
 409                         .disable_more_flag_usage = true,
 410                 };
 411
 412                 wsm_lock_tx(priv);
 413                 /* Disable p2p-dev mode forced by TX request */
 414                 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
 415                     (conf->flags & IEEE80211_CONF_IDLE) &&
 416                     !priv->listening) {
 417                         cw1200_disable_listening(priv);
 418                         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
 419                 }
 420                 wsm_set_operational_mode(priv, &mode);
 421                 wsm_unlock_tx(priv);
 422         }
 423
 424         if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
 425                 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
 426                          conf->long_frame_max_tx_count,
 427                          conf->short_frame_max_tx_count);
 428                 spin_lock_bh(&priv->tx_policy_cache.lock);
 429                 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
 430                 priv->short_frame_max_tx_count =
 431                         (conf->short_frame_max_tx_count < 0x0F) ?
 432                         conf->short_frame_max_tx_count : 0x0F;
 433                 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
 434                 spin_unlock_bh(&priv->tx_policy_cache.lock);
 435         }
 436         mutex_unlock(&priv->conf_mutex);
 437         up(&priv->scan.lock);
 438         return ret;
 439 }
 440
 441 void cw1200_update_filtering(struct cw1200_common *priv)
 442 {
 443         int ret;
 444         bool bssid_filtering = !priv->rx_filter.bssid;
 445         bool is_p2p = priv->vif && priv->vif->p2p;
 446         bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
 447
 448         static struct wsm_beacon_filter_control bf_ctrl;
 449         static struct wsm_mib_beacon_filter_table bf_tbl = {
 450                 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
 451                 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 452                                         WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 453                                         WSM_BEACON_FILTER_IE_HAS_APPEARED,
 454                 .entry[0].oui[0] = 0x50,
 455                 .entry[0].oui[1] = 0x6F,
 456                 .entry[0].oui[2] = 0x9A,
 457                 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
 458                 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 459                                         WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 460                                         WSM_BEACON_FILTER_IE_HAS_APPEARED,
 461                 .entry[2].ie_id = WLAN_EID_ERP_INFO,
 462                 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
 463                                         WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
 464                                         WSM_BEACON_FILTER_IE_HAS_APPEARED,
 465         };
 466
 467         if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
 468                 return;
 469         else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
 470                 bssid_filtering = false;
 471
 472         if (priv->disable_beacon_filter) {
 473                 bf_ctrl.enabled = 0;
 474                 bf_ctrl.bcn_count = 1;
 475                 bf_tbl.num = __cpu_to_le32(0);
 476         } else if (is_p2p || !is_sta) {
 477                 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
 478                         WSM_BEACON_FILTER_AUTO_ERP;
 479                 bf_ctrl.bcn_count = 0;
 480                 bf_tbl.num = __cpu_to_le32(2);
 481         } else {
 482                 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
 483                 bf_ctrl.bcn_count = 0;
 484                 bf_tbl.num = __cpu_to_le32(3);
 485         }
 486
 487         /* When acting as p2p client being connected to p2p GO, in order to
 488          * receive frames from a different p2p device, turn off bssid filter.
 489          *
 490          * WARNING: FW dependency!
 491          * This can only be used with FW WSM371 and its successors.
 492          * In that FW version even with bssid filter turned off,
 493          * device will block most of the unwanted frames.
 494          */
 495         if (is_p2p)
 496                 bssid_filtering = false;
 497
 498         ret = wsm_set_rx_filter(priv, &priv->rx_filter);
 499         if (!ret)
 500                 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
 501         if (!ret)
 502                 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
 503         if (!ret)
 504                 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
 505         if (!ret)
 506                 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
 507         if (ret)
 508                 wiphy_err(priv->hw->wiphy,
 509                           "Update filtering failed: %d.\n", ret);
 510         return;
 511 }
 512
 513 void cw1200_update_filtering_work(struct work_struct *work)
 514 {
 515         struct cw1200_common *priv =
 516                 container_of(work, struct cw1200_common,
 517                              update_filtering_work);
 518
 519         cw1200_update_filtering(priv);
 520 }
 521
 522 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
 523 {
 524         struct cw1200_common *priv =
 525                 container_of(work, struct cw1200_common,
 526                              set_beacon_wakeup_period_work);
 527
 528         wsm_set_beacon_wakeup_period(priv,
 529                                      priv->beacon_int * priv->join_dtim_period >
 530                                      MAX_BEACON_SKIP_TIME_MS ? 1 :
 531                                      priv->join_dtim_period, 0);
 532 }
 533
 534 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
 535                              struct netdev_hw_addr_list *mc_list)
 536 {
 537         static u8 broadcast_ipv6[ETH_ALEN] = {
 538                 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
 539         };
 540         static u8 broadcast_ipv4[ETH_ALEN] = {
 541                 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
 542         };
 543         struct cw1200_common *priv = hw->priv;
 544         struct netdev_hw_addr *ha;
 545         int count = 0;
 546
 547         /* Disable multicast filtering */
 548         priv->has_multicast_subscription = false;
 549         memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
 550
 551         if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
 552                 return 0;
 553
 554         /* Enable if requested */
 555         netdev_hw_addr_list_for_each(ha, mc_list) {
 556                 pr_debug("[STA] multicast: %pM\n", ha->addr);
 557                 memcpy(&priv->multicast_filter.macaddrs[count],
 558                        ha->addr, ETH_ALEN);
 559                 if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
 560                     !ether_addr_equal(ha->addr, broadcast_ipv6))
 561                         priv->has_multicast_subscription = true;
 562                 count++;
 563         }
 564
 565         if (count) {
 566                 priv->multicast_filter.enable = __cpu_to_le32(1);
 567                 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
 568         }
 569
 570         return netdev_hw_addr_list_count(mc_list);
 571 }
 572
 573 void cw1200_configure_filter(struct ieee80211_hw *dev,
 574                              unsigned int changed_flags,
 575                              unsigned int *total_flags,
 576                              u64 multicast)
 577 {
 578         struct cw1200_common *priv = dev->priv;
 579         bool listening = !!(*total_flags &
 580                             (FIF_PROMISC_IN_BSS |
 581                              FIF_OTHER_BSS |
 582                              FIF_BCN_PRBRESP_PROMISC |
 583                              FIF_PROBE_REQ));
 584
 585         *total_flags &= FIF_PROMISC_IN_BSS |
 586                         FIF_OTHER_BSS |
 587                         FIF_FCSFAIL |
 588                         FIF_BCN_PRBRESP_PROMISC |
 589                         FIF_PROBE_REQ;
 590
 591         down(&priv->scan.lock);
 592         mutex_lock(&priv->conf_mutex);
 593
 594         priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
 595                         ? 1 : 0;
 596         priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
 597                         FIF_PROBE_REQ)) ? 1 : 0;
 598         priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
 599         priv->disable_beacon_filter = !(*total_flags &
 600                                         (FIF_BCN_PRBRESP_PROMISC |
 601                                          FIF_PROMISC_IN_BSS |
 602                                          FIF_PROBE_REQ));
 603         if (priv->listening != listening) {
 604                 priv->listening = listening;
 605                 wsm_lock_tx(priv);
 606                 cw1200_update_listening(priv, listening);
 607                 wsm_unlock_tx(priv);
 608         }
 609         cw1200_update_filtering(priv);
 610         mutex_unlock(&priv->conf_mutex);
 611         up(&priv->scan.lock);
 612 }
 613
 614 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
 615                    u16 queue, const struct ieee80211_tx_queue_params *params)
 616 {
 617         struct cw1200_common *priv = dev->priv;
 618         int ret = 0;
 619         /* To prevent re-applying PM request OID again and again*/
 620         bool old_uapsd_flags;
 621
 622         mutex_lock(&priv->conf_mutex);
 623
 624         if (queue < dev->queues) {
 625                 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
 626
 627                 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
 628                 ret = wsm_set_tx_queue_params(priv,
 629                                               &priv->tx_queue_params.params[queue], queue);
 630                 if (ret) {
 631                         ret = -EINVAL;
 632                         goto out;
 633                 }
 634
 635                 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
 636                              params->cw_min, params->cw_max,
 637                              params->txop, 0xc8,
 638                              params->uapsd);
 639                 ret = wsm_set_edca_params(priv, &priv->edca);
 640                 if (ret) {
 641                         ret = -EINVAL;
 642                         goto out;
 643                 }
 644
 645                 if (priv->mode == NL80211_IFTYPE_STATION) {
 646                         ret = cw1200_set_uapsd_param(priv, &priv->edca);
 647                         if (!ret && priv->setbssparams_done &&
 648                             (priv->join_status == CW1200_JOIN_STATUS_STA) &&
 649                             (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
 650                                 ret = cw1200_set_pm(priv, &priv->powersave_mode);
 651                 }
 652         } else {
 653                 ret = -EINVAL;
 654         }
 655
 656 out:
 657         mutex_unlock(&priv->conf_mutex);
 658         return ret;
 659 }
 660
 661 int cw1200_get_stats(struct ieee80211_hw *dev,
 662                      struct ieee80211_low_level_stats *stats)
 663 {
 664         struct cw1200_common *priv = dev->priv;
 665
 666         memcpy(stats, &priv->stats, sizeof(*stats));
 667         return 0;
 668 }
 669
 670 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
 671 {
 672         struct wsm_set_pm pm = *arg;
 673
 674         if (priv->uapsd_info.uapsd_flags != 0)
 675                 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
 676
 677         if (memcmp(&pm, &priv->firmware_ps_mode,
 678                    sizeof(struct wsm_set_pm))) {
 679                 priv->firmware_ps_mode = pm;
 680                 return wsm_set_pm(priv, &pm);
 681         } else {
 682                 return 0;
 683         }
 684 }
 685
 686 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 687                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 688                    struct ieee80211_key_conf *key)
 689 {
 690         int ret = -EOPNOTSUPP;
 691         struct cw1200_common *priv = dev->priv;
 692         struct ieee80211_key_seq seq;
 693
 694         mutex_lock(&priv->conf_mutex);
 695
 696         if (cmd == SET_KEY) {
 697                 u8 *peer_addr = NULL;
 698                 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
 699                         1 : 0;
 700                 int idx = cw1200_alloc_key(priv);
 701                 struct wsm_add_key *wsm_key = &priv->keys[idx];
 702
 703                 if (idx < 0) {
 704                         ret = -EINVAL;
 705                         goto finally;
 706                 }
 707
 708                 if (sta)
 709                         peer_addr = sta->addr;
 710
 711                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
 712
 713                 switch (key->cipher) {
 714                 case WLAN_CIPHER_SUITE_WEP40:
 715                 case WLAN_CIPHER_SUITE_WEP104:
 716                         if (key->keylen > 16) {
 717                                 cw1200_free_key(priv, idx);
 718                                 ret = -EINVAL;
 719                                 goto finally;
 720                         }
 721
 722                         if (pairwise) {
 723                                 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
 724                                 memcpy(wsm_key->wep_pairwise.peer,
 725                                        peer_addr, ETH_ALEN);
 726                                 memcpy(wsm_key->wep_pairwise.keydata,
 727                                        &key->key[0], key->keylen);
 728                                 wsm_key->wep_pairwise.keylen = key->keylen;
 729                         } else {
 730                                 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
 731                                 memcpy(wsm_key->wep_group.keydata,
 732                                        &key->key[0], key->keylen);
 733                                 wsm_key->wep_group.keylen = key->keylen;
 734                                 wsm_key->wep_group.keyid = key->keyidx;
 735                         }
 736                         break;
 737                 case WLAN_CIPHER_SUITE_TKIP:
 738                         ieee80211_get_key_rx_seq(key, 0, &seq);
 739                         if (pairwise) {
 740                                 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
 741                                 memcpy(wsm_key->tkip_pairwise.peer,
 742                                        peer_addr, ETH_ALEN);
 743                                 memcpy(wsm_key->tkip_pairwise.keydata,
 744                                        &key->key[0], 16);
 745                                 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
 746                                        &key->key[16], 8);
 747                                 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
 748                                        &key->key[24], 8);
 749                         } else {
 750                                 size_t mic_offset =
 751                                         (priv->mode == NL80211_IFTYPE_AP) ?
 752                                         16 : 24;
 753                                 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
 754                                 memcpy(wsm_key->tkip_group.keydata,
 755                                        &key->key[0], 16);
 756                                 memcpy(wsm_key->tkip_group.rx_mic_key,
 757                                        &key->key[mic_offset], 8);
 758
 759                                 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
 760                                 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
 761                                 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
 762                                 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
 763                                 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
 764                                 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
 765                                 wsm_key->tkip_group.rx_seqnum[6] = 0;
 766                                 wsm_key->tkip_group.rx_seqnum[7] = 0;
 767
 768                                 wsm_key->tkip_group.keyid = key->keyidx;
 769                         }
 770                         break;
 771                 case WLAN_CIPHER_SUITE_CCMP:
 772                         ieee80211_get_key_rx_seq(key, 0, &seq);
 773                         if (pairwise) {
 774                                 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
 775                                 memcpy(wsm_key->aes_pairwise.peer,
 776                                        peer_addr, ETH_ALEN);
 777                                 memcpy(wsm_key->aes_pairwise.keydata,
 778                                        &key->key[0], 16);
 779                         } else {
 780                                 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
 781                                 memcpy(wsm_key->aes_group.keydata,
 782                                        &key->key[0], 16);
 783
 784                                 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
 785                                 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
 786                                 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
 787                                 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
 788                                 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
 789                                 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
 790                                 wsm_key->aes_group.rx_seqnum[6] = 0;
 791                                 wsm_key->aes_group.rx_seqnum[7] = 0;
 792                                 wsm_key->aes_group.keyid = key->keyidx;
 793                         }
 794                         break;
 795                 case WLAN_CIPHER_SUITE_SMS4:
 796                         if (pairwise) {
 797                                 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
 798                                 memcpy(wsm_key->wapi_pairwise.peer,
 799                                        peer_addr, ETH_ALEN);
 800                                 memcpy(wsm_key->wapi_pairwise.keydata,
 801                                        &key->key[0], 16);
 802                                 memcpy(wsm_key->wapi_pairwise.mic_key,
 803                                        &key->key[16], 16);
 804                                 wsm_key->wapi_pairwise.keyid = key->keyidx;
 805                         } else {
 806                                 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
 807                                 memcpy(wsm_key->wapi_group.keydata,
 808                                        &key->key[0],  16);
 809                                 memcpy(wsm_key->wapi_group.mic_key,
 810                                        &key->key[16], 16);
 811                                 wsm_key->wapi_group.keyid = key->keyidx;
 812                         }
 813                         break;
 814                 default:
 815                         pr_warn("Unhandled key type %d\n", key->cipher);
 816                         cw1200_free_key(priv, idx);
 817                         ret = -EOPNOTSUPP;
 818                         goto finally;
 819                 }
 820                 ret = wsm_add_key(priv, wsm_key);
 821                 if (!ret)
 822                         key->hw_key_idx = idx;
 823                 else
 824                         cw1200_free_key(priv, idx);
 825         } else if (cmd == DISABLE_KEY) {
 826                 struct wsm_remove_key wsm_key = {
 827                         .index = key->hw_key_idx,
 828                 };
 829
 830                 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
 831                         ret = -EINVAL;
 832                         goto finally;
 833                 }
 834
 835                 cw1200_free_key(priv, wsm_key.index);
 836                 ret = wsm_remove_key(priv, &wsm_key);
 837         } else {
 838                 pr_warn("Unhandled key command %d\n", cmd);
 839         }
 840
 841 finally:
 842         mutex_unlock(&priv->conf_mutex);
 843         return ret;
 844 }
 845
 846 void cw1200_wep_key_work(struct work_struct *work)
 847 {
 848         struct cw1200_common *priv =
 849                 container_of(work, struct cw1200_common, wep_key_work);
 850         u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
 851         struct cw1200_queue *queue = &priv->tx_queue[queue_id];
 852         __le32 wep_default_key_id = __cpu_to_le32(
 853                 priv->wep_default_key_id);
 854
 855         pr_debug("[STA] Setting default WEP key: %d\n",
 856                  priv->wep_default_key_id);
 857         wsm_flush_tx(priv);
 858         wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
 859                       &wep_default_key_id, sizeof(wep_default_key_id));
 860         cw1200_queue_requeue(queue, priv->pending_frame_id);
 861         wsm_unlock_tx(priv);
 862 }
 863
 864 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 865 {
 866         int ret = 0;
 867         __le32 val32;
 868         struct cw1200_common *priv = hw->priv;
 869
 870         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 871                 return 0;
 872
 873         if (value != (u32) -1)
 874                 val32 = __cpu_to_le32(value);
 875         else
 876                 val32 = 0; /* disabled */
 877
 878         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
 879                 /* device is down, can _not_ set threshold */
 880                 ret = -ENODEV;
 881                 goto out;
 882         }
 883
 884         if (priv->rts_threshold == value)
 885                 goto out;
 886
 887         pr_debug("[STA] Setting RTS threshold: %d\n",
 888                  priv->rts_threshold);
 889
 890         /* mutex_lock(&priv->conf_mutex); */
 891         ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
 892                             &val32, sizeof(val32));
 893         if (!ret)
 894                 priv->rts_threshold = value;
 895         /* mutex_unlock(&priv->conf_mutex); */
 896
 897 out:
 898         return ret;
 899 }
 900
 901 /* If successful, LOCKS the TX queue! */
 902 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
 903 {
 904         int i, ret;
 905
 906         for (;;) {
 907                 /* TODO: correct flush handling is required when dev_stop.
 908                  * Temporary workaround: 2s
 909                  */
 910                 if (drop) {
 911                         for (i = 0; i < 4; ++i)
 912                                 cw1200_queue_clear(&priv->tx_queue[i]);
 913                 } else {
 914                         ret = wait_event_timeout(
 915                                 priv->tx_queue_stats.wait_link_id_empty,
 916                                 cw1200_queue_stats_is_empty(
 917                                         &priv->tx_queue_stats, -1),
 918                                 2 * HZ);
 919                 }
 920
 921                 if (!drop && ret <= 0) {
 922                         ret = -ETIMEDOUT;
 923                         break;
 924                 } else {
 925                         ret = 0;
 926                 }
 927
 928                 wsm_lock_tx(priv);
 929                 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
 930                         /* Highly unlikely: WSM requeued frames. */
 931                         wsm_unlock_tx(priv);
 932                         continue;
 933                 }
 934                 break;
 935         }
 936         return ret;
 937 }
 938
 939 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 940                   u32 queues, bool drop)
 941 {
 942         struct cw1200_common *priv = hw->priv;
 943
 944         switch (priv->mode) {
 945         case NL80211_IFTYPE_MONITOR:
 946                 drop = true;
 947                 break;
 948         case NL80211_IFTYPE_AP:
 949                 if (!priv->enable_beacon)
 950                         drop = true;
 951                 break;
 952         }
 953
 954         if (!__cw1200_flush(priv, drop))
 955                 wsm_unlock_tx(priv);
 956
 957         return;
 958 }
 959
 960 /* ******************************************************************** */
 961 /* WSM callbacks                                                        */
 962
 963 void cw1200_free_event_queue(struct cw1200_common *priv)
 964 {
 965         LIST_HEAD(list);
 966
 967         spin_lock(&priv->event_queue_lock);
 968         list_splice_init(&priv->event_queue, &list);
 969         spin_unlock(&priv->event_queue_lock);
 970
 971         __cw1200_free_event_queue(&list);
 972 }
 973
 974 void cw1200_event_handler(struct work_struct *work)
 975 {
 976         struct cw1200_common *priv =
 977                 container_of(work, struct cw1200_common, event_handler);
 978         struct cw1200_wsm_event *event;
 979         LIST_HEAD(list);
 980
 981         spin_lock(&priv->event_queue_lock);
 982         list_splice_init(&priv->event_queue, &list);
 983         spin_unlock(&priv->event_queue_lock);
 984
 985         list_for_each_entry(event, &list, link) {
 986                 switch (event->evt.id) {
 987                 case WSM_EVENT_ERROR:
 988                         pr_err("Unhandled WSM Error from LMAC\n");
 989                         break;
 990                 case WSM_EVENT_BSS_LOST:
 991                         pr_debug("[CQM] BSS lost.\n");
 992                         cancel_work_sync(&priv->unjoin_work);
 993                         if (!down_trylock(&priv->scan.lock)) {
 994                                 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
 995                                 up(&priv->scan.lock);
 996                         } else {
 997                                 /* Scan is in progress. Delay reporting.
 998                                  * Scan complete will trigger bss_loss_work
 999                                  */
1000                                 priv->delayed_link_loss = 1;
1001                                 /* Also start a watchdog. */
1002                                 queue_delayed_work(priv->workqueue,
1003                                                    &priv->bss_loss_work, 5*HZ);
1004                         }
1005                         break;
1006                 case WSM_EVENT_BSS_REGAINED:
1007                         pr_debug("[CQM] BSS regained.\n");
1008                         cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1009                         cancel_work_sync(&priv->unjoin_work);
1010                         break;
1011                 case WSM_EVENT_RADAR_DETECTED:
1012                         wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1013                         break;
1014                 case WSM_EVENT_RCPI_RSSI:
1015                 {
1016                         /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1017                          * RSSI = RCPI / 2 - 110
1018                          */
1019                         int rcpi_rssi = (int)(event->evt.data & 0xFF);
1020                         int cqm_evt;
1021                         if (priv->cqm_use_rssi)
1022                                 rcpi_rssi = (s8)rcpi_rssi;
1023                         else
1024                                 rcpi_rssi =  rcpi_rssi / 2 - 110;
1025
1026                         cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1027                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1028                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1029                         pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1030                         ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1031                                                   GFP_KERNEL);
1032                         break;
1033                 }
1034                 case WSM_EVENT_BT_INACTIVE:
1035                         pr_warn("Unhandled BT INACTIVE from LMAC\n");
1036                         break;
1037                 case WSM_EVENT_BT_ACTIVE:
1038                         pr_warn("Unhandled BT ACTIVE from LMAC\n");
1039                         break;
1040                 }
1041         }
1042         __cw1200_free_event_queue(&list);
1043 }
1044
1045 void cw1200_bss_loss_work(struct work_struct *work)
1046 {
1047         struct cw1200_common *priv =
1048                 container_of(work, struct cw1200_common, bss_loss_work.work);
1049
1050         pr_debug("[CQM] Reporting connection loss.\n");
1051         wsm_lock_tx(priv);
1052         if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1053                 wsm_unlock_tx(priv);
1054 }
1055
1056 void cw1200_bss_params_work(struct work_struct *work)
1057 {
1058         struct cw1200_common *priv =
1059                 container_of(work, struct cw1200_common, bss_params_work);
1060         mutex_lock(&priv->conf_mutex);
1061
1062         priv->bss_params.reset_beacon_loss = 1;
1063         wsm_set_bss_params(priv, &priv->bss_params);
1064         priv->bss_params.reset_beacon_loss = 0;
1065
1066         mutex_unlock(&priv->conf_mutex);
1067 }
1068
1069 /* ******************************************************************** */
1070 /* Internal API                                                         */
1071
1072 /* This function is called to Parse the SDD file
1073  * to extract listen_interval and PTA related information
1074  * sdd is a TLV: u8 id, u8 len, u8 data[]
1075  */
1076 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1077 {
1078         const u8 *p = priv->sdd->data;
1079         int ret = 0;
1080
1081         while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1082                 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1083                         pr_warn("Malformed sdd structure\n");
1084                         return -1;
1085                 }
1086                 switch (p[0]) {
1087                 case SDD_PTA_CFG_ELT_ID: {
1088                         u16 v;
1089                         if (p[1] < 4) {
1090                                 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1091                                 ret = -1;
1092                                 break;
1093                         }
1094                         v = le16_to_cpu(*((__le16 *)(p + 2)));
1095                         if (!v)  /* non-zero means this is enabled */
1096                                 break;
1097
1098                         v = le16_to_cpu(*((__le16 *)(p + 4)));
1099                         priv->conf_listen_interval = (v >> 7) & 0x1F;
1100                         pr_debug("PTA found; Listen Interval %d\n",
1101                                  priv->conf_listen_interval);
1102                         break;
1103                 }
1104                 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1105                         u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1106                         if (clk != priv->hw_refclk)
1107                                 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1108                                         clk, priv->hw_refclk);
1109                         break;
1110                 }
1111                 default:
1112                         break;
1113                 }
1114                 p += p[1] + 2;
1115         }
1116
1117         if (!priv->bt_present) {
1118                 pr_debug("PTA element NOT found.\n");
1119                 priv->conf_listen_interval = 0;
1120         }
1121         return ret;
1122 }
1123
1124 int cw1200_setup_mac(struct cw1200_common *priv)
1125 {
1126         int ret = 0;
1127
1128         /* NOTE: There is a bug in FW: it reports signal
1129          * as RSSI if RSSI subscription is enabled.
1130          * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1131          *
1132          * NOTE2: RSSI based reports have been switched to RCPI, since
1133          * FW has a bug and RSSI reported values are not stable,
1134          * what can leads to signal level oscilations in user-end applications
1135          */
1136         struct wsm_rcpi_rssi_threshold threshold = {
1137                 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1138                 WSM_RCPI_RSSI_DONT_USE_UPPER |
1139                 WSM_RCPI_RSSI_DONT_USE_LOWER,
1140                 .rollingAverageCount = 16,
1141         };
1142
1143         struct wsm_configuration cfg = {
1144                 .dot11StationId = &priv->mac_addr[0],
1145         };
1146
1147         /* Remember the decission here to make sure, we will handle
1148          * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1149          */
1150         if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1151                 priv->cqm_use_rssi = true;
1152
1153         if (!priv->sdd) {
1154                 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1155                 if (ret) {
1156                         pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1157                         return ret;
1158                 }
1159                 cw1200_parse_sdd_file(priv);
1160         }
1161
1162         cfg.dpdData = priv->sdd->data;
1163         cfg.dpdData_size = priv->sdd->size;
1164         ret = wsm_configuration(priv, &cfg);
1165         if (ret)
1166                 return ret;
1167
1168         /* Configure RSSI/SCPI reporting as RSSI. */
1169         wsm_set_rcpi_rssi_threshold(priv, &threshold);
1170
1171         return 0;
1172 }
1173
1174 static void cw1200_join_complete(struct cw1200_common *priv)
1175 {
1176         pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1177
1178         priv->join_pending = false;
1179         if (priv->join_complete_status) {
1180                 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1181                 cw1200_update_listening(priv, priv->listening);
1182                 cw1200_do_unjoin(priv);
1183                 ieee80211_connection_loss(priv->vif);
1184         } else {
1185                 if (priv->mode == NL80211_IFTYPE_ADHOC)
1186                         priv->join_status = CW1200_JOIN_STATUS_IBSS;
1187                 else
1188                         priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1189         }
1190         wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1191 }
1192
1193 void cw1200_join_complete_work(struct work_struct *work)
1194 {
1195         struct cw1200_common *priv =
1196                 container_of(work, struct cw1200_common, join_complete_work);
1197         mutex_lock(&priv->conf_mutex);
1198         cw1200_join_complete(priv);
1199         mutex_unlock(&priv->conf_mutex);
1200 }
1201
1202 void cw1200_join_complete_cb(struct cw1200_common *priv,
1203                              struct wsm_join_complete *arg)
1204 {
1205         pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1206                  arg->status);
1207
1208         if (cancel_delayed_work(&priv->join_timeout)) {
1209                 priv->join_complete_status = arg->status;
1210                 queue_work(priv->workqueue, &priv->join_complete_work);
1211         }
1212 }
1213
1214 /* MUST be called with tx_lock held!  It will be unlocked for us. */
1215 static void cw1200_do_join(struct cw1200_common *priv)
1216 {
1217         const u8 *bssid;
1218         struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1219         struct cfg80211_bss *bss = NULL;
1220         struct wsm_protected_mgmt_policy mgmt_policy;
1221         struct wsm_join join = {
1222                 .mode = conf->ibss_joined ?
1223                                 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1224                 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1225                 .probe_for_join = 1,
1226                 .atim_window = 0,
1227                 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1228                                                           conf->basic_rates),
1229         };
1230         if (delayed_work_pending(&priv->join_timeout)) {
1231                 pr_warn("[STA] - Join request already pending, skipping..\n");
1232                 wsm_unlock_tx(priv);
1233                 return;
1234         }
1235
1236         if (priv->join_status)
1237                 cw1200_do_unjoin(priv);
1238
1239         bssid = priv->vif->bss_conf.bssid;
1240
1241         bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
1242                         bssid, NULL, 0, 0, 0);
1243
1244         if (!bss && !conf->ibss_joined) {
1245                 wsm_unlock_tx(priv);
1246                 return;
1247         }
1248
1249         mutex_lock(&priv->conf_mutex);
1250
1251         /* Under the conf lock: check scan status and
1252          * bail out if it is in progress.
1253          */
1254         if (atomic_read(&priv->scan.in_progress)) {
1255                 wsm_unlock_tx(priv);
1256                 goto done_put;
1257         }
1258
1259         priv->join_pending = true;
1260
1261         /* Sanity check basic rates */
1262         if (!join.basic_rate_set)
1263                 join.basic_rate_set = 7;
1264
1265         /* Sanity check beacon interval */
1266         if (!priv->beacon_int)
1267                 priv->beacon_int = 1;
1268
1269         join.beacon_interval = priv->beacon_int;
1270
1271         /* BT Coex related changes */
1272         if (priv->bt_present) {
1273                 if (((priv->conf_listen_interval * 100) %
1274                      priv->beacon_int) == 0)
1275                         priv->listen_interval =
1276                                 ((priv->conf_listen_interval * 100) /
1277                                  priv->beacon_int);
1278                 else
1279                         priv->listen_interval =
1280                                 ((priv->conf_listen_interval * 100) /
1281                                  priv->beacon_int + 1);
1282         }
1283
1284         if (priv->hw->conf.ps_dtim_period)
1285                 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1286         join.dtim_period = priv->join_dtim_period;
1287
1288         join.channel_number = priv->channel->hw_value;
1289         join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1290                 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1291
1292         memcpy(join.bssid, bssid, sizeof(join.bssid));
1293
1294         pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1295                  join.bssid,
1296                  join.dtim_period, priv->beacon_int);
1297
1298         if (!conf->ibss_joined) {
1299                 const u8 *ssidie;
1300                 rcu_read_lock();
1301                 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1302                 if (ssidie) {
1303                         join.ssid_len = ssidie[1];
1304                         memcpy(join.ssid, &ssidie[2], join.ssid_len);
1305                 }
1306                 rcu_read_unlock();
1307         }
1308
1309         if (priv->vif->p2p) {
1310                 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1311                 join.basic_rate_set =
1312                         cw1200_rate_mask_to_wsm(priv, 0xFF0);
1313         }
1314
1315         /* Enable asynchronous join calls */
1316         if (!conf->ibss_joined) {
1317                 join.flags |= WSM_JOIN_FLAGS_FORCE;
1318                 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1319         }
1320
1321         wsm_flush_tx(priv);
1322
1323         /* Stay Awake for Join and Auth Timeouts and a bit more */
1324         cw1200_pm_stay_awake(&priv->pm_state,
1325                              CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1326
1327         cw1200_update_listening(priv, false);
1328
1329         /* Turn on Block ACKs */
1330         wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1331                                  priv->ba_rx_tid_mask);
1332
1333         /* Set up timeout */
1334         if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1335                 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1336                 queue_delayed_work(priv->workqueue,
1337                                    &priv->join_timeout,
1338                                    CW1200_JOIN_TIMEOUT);
1339         }
1340
1341         /* 802.11w protected mgmt frames */
1342         mgmt_policy.protectedMgmtEnable = 0;
1343         mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1344         mgmt_policy.encryptionForAuthFrame = 1;
1345         wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1346
1347         /* Perform actual join */
1348         if (wsm_join(priv, &join)) {
1349                 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1350                 cancel_delayed_work_sync(&priv->join_timeout);
1351                 cw1200_update_listening(priv, priv->listening);
1352                 /* Tx lock still held, unjoin will clear it. */
1353                 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1354                         wsm_unlock_tx(priv);
1355         } else {
1356                 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1357                         cw1200_join_complete(priv); /* Will clear tx_lock */
1358
1359                 /* Upload keys */
1360                 cw1200_upload_keys(priv);
1361
1362                 /* Due to beacon filtering it is possible that the
1363                  * AP's beacon is not known for the mac80211 stack.
1364                  * Disable filtering temporary to make sure the stack
1365                  * receives at least one
1366                  */
1367                 priv->disable_beacon_filter = true;
1368         }
1369         cw1200_update_filtering(priv);
1370
1371 done_put:
1372         mutex_unlock(&priv->conf_mutex);
1373         if (bss)
1374                 cfg80211_put_bss(priv->hw->wiphy, bss);
1375 }
1376
1377 void cw1200_join_timeout(struct work_struct *work)
1378 {
1379         struct cw1200_common *priv =
1380                 container_of(work, struct cw1200_common, join_timeout.work);
1381         pr_debug("[WSM] Join timed out.\n");
1382         wsm_lock_tx(priv);
1383         if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1384                 wsm_unlock_tx(priv);
1385 }
1386
1387 static void cw1200_do_unjoin(struct cw1200_common *priv)
1388 {
1389         struct wsm_reset reset = {
1390                 .reset_statistics = true,
1391         };
1392
1393         cancel_delayed_work_sync(&priv->join_timeout);
1394
1395         mutex_lock(&priv->conf_mutex);
1396         priv->join_pending = false;
1397
1398         if (atomic_read(&priv->scan.in_progress)) {
1399                 if (priv->delayed_unjoin)
1400                         wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1401                 else
1402                         priv->delayed_unjoin = true;
1403                 goto done;
1404         }
1405
1406         priv->delayed_link_loss = false;
1407
1408         if (!priv->join_status)
1409                 goto done;
1410
1411         if (priv->join_status == CW1200_JOIN_STATUS_AP)
1412                 goto done;
1413
1414         cancel_work_sync(&priv->update_filtering_work);
1415         cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1416         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1417
1418         /* Unjoin is a reset. */
1419         wsm_flush_tx(priv);
1420         wsm_keep_alive_period(priv, 0);
1421         wsm_reset(priv, &reset);
1422         wsm_set_output_power(priv, priv->output_power * 10);
1423         priv->join_dtim_period = 0;
1424         cw1200_setup_mac(priv);
1425         cw1200_free_event_queue(priv);
1426         cancel_work_sync(&priv->event_handler);
1427         cw1200_update_listening(priv, priv->listening);
1428         cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1429
1430         /* Disable Block ACKs */
1431         wsm_set_block_ack_policy(priv, 0, 0);
1432
1433         priv->disable_beacon_filter = false;
1434         cw1200_update_filtering(priv);
1435         memset(&priv->association_mode, 0,
1436                sizeof(priv->association_mode));
1437         memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1438         priv->setbssparams_done = false;
1439         memset(&priv->firmware_ps_mode, 0,
1440                sizeof(priv->firmware_ps_mode));
1441
1442         pr_debug("[STA] Unjoin completed.\n");
1443
1444 done:
1445         mutex_unlock(&priv->conf_mutex);
1446 }
1447
1448 void cw1200_unjoin_work(struct work_struct *work)
1449 {
1450         struct cw1200_common *priv =
1451                 container_of(work, struct cw1200_common, unjoin_work);
1452
1453         cw1200_do_unjoin(priv);
1454
1455         /* Tell the stack we're dead */
1456         ieee80211_connection_loss(priv->vif);
1457
1458         wsm_unlock_tx(priv);
1459 }
1460
1461 int cw1200_enable_listening(struct cw1200_common *priv)
1462 {
1463         struct wsm_start start = {
1464                 .mode = WSM_START_MODE_P2P_DEV,
1465                 .band = WSM_PHY_BAND_2_4G,
1466                 .beacon_interval = 100,
1467                 .dtim_period = 1,
1468                 .probe_delay = 0,
1469                 .basic_rate_set = 0x0F,
1470         };
1471
1472         if (priv->channel) {
1473                 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1474                              WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1475                 start.channel_number = priv->channel->hw_value;
1476         } else {
1477                 start.band = WSM_PHY_BAND_2_4G;
1478                 start.channel_number = 1;
1479         }
1480
1481         return wsm_start(priv, &start);
1482 }
1483
1484 int cw1200_disable_listening(struct cw1200_common *priv)
1485 {
1486         int ret;
1487         struct wsm_reset reset = {
1488                 .reset_statistics = true,
1489         };
1490         ret = wsm_reset(priv, &reset);
1491         return ret;
1492 }
1493
1494 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1495 {
1496         if (enabled) {
1497                 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1498                         if (!cw1200_enable_listening(priv))
1499                                 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1500                         wsm_set_probe_responder(priv, true);
1501                 }
1502         } else {
1503                 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1504                         if (!cw1200_disable_listening(priv))
1505                                 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1506                         wsm_set_probe_responder(priv, false);
1507                 }
1508         }
1509 }
1510
1511 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1512                            const struct wsm_edca_params *arg)
1513 {
1514         int ret;
1515         u16 uapsd_flags = 0;
1516
1517         /* Here's the mapping AC [queue, bit]
1518          *  VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1519          */
1520
1521         if (arg->uapsd_enable[0])
1522                 uapsd_flags |= 1 << 3;
1523
1524         if (arg->uapsd_enable[1])
1525                 uapsd_flags |= 1 << 2;
1526
1527         if (arg->uapsd_enable[2])
1528                 uapsd_flags |= 1 << 1;
1529
1530         if (arg->uapsd_enable[3])
1531                 uapsd_flags |= 1;
1532
1533         /* Currently pseudo U-APSD operation is not supported, so setting
1534          * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1535          * AutoTriggerStep to 0
1536          */
1537
1538         priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1539         priv->uapsd_info.min_auto_trigger_interval = 0;
1540         priv->uapsd_info.max_auto_trigger_interval = 0;
1541         priv->uapsd_info.auto_trigger_step = 0;
1542
1543         ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1544         return ret;
1545 }
1546
1547 /* ******************************************************************** */
1548 /* AP API                                                               */
1549
1550 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1551                    struct ieee80211_sta *sta)
1552 {
1553         struct cw1200_common *priv = hw->priv;
1554         struct cw1200_sta_priv *sta_priv =
1555                         (struct cw1200_sta_priv *)&sta->drv_priv;
1556         struct cw1200_link_entry *entry;
1557         struct sk_buff *skb;
1558
1559         if (priv->mode != NL80211_IFTYPE_AP)
1560                 return 0;
1561
1562         sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1563         if (WARN_ON(!sta_priv->link_id)) {
1564                 wiphy_info(priv->hw->wiphy,
1565                            "[AP] No more link IDs available.\n");
1566                 return -ENOENT;
1567         }
1568
1569         entry = &priv->link_id_db[sta_priv->link_id - 1];
1570         spin_lock_bh(&priv->ps_state_lock);
1571         if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1572                                         IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1573                 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1574         entry->status = CW1200_LINK_HARD;
1575         while ((skb = skb_dequeue(&entry->rx_queue)))
1576                 ieee80211_rx_irqsafe(priv->hw, skb);
1577         spin_unlock_bh(&priv->ps_state_lock);
1578         return 0;
1579 }
1580
1581 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1582                       struct ieee80211_sta *sta)
1583 {
1584         struct cw1200_common *priv = hw->priv;
1585         struct cw1200_sta_priv *sta_priv =
1586                         (struct cw1200_sta_priv *)&sta->drv_priv;
1587         struct cw1200_link_entry *entry;
1588
1589         if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1590                 return 0;
1591
1592         entry = &priv->link_id_db[sta_priv->link_id - 1];
1593         spin_lock_bh(&priv->ps_state_lock);
1594         entry->status = CW1200_LINK_RESERVE;
1595         entry->timestamp = jiffies;
1596         wsm_lock_tx_async(priv);
1597         if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1598                 wsm_unlock_tx(priv);
1599         spin_unlock_bh(&priv->ps_state_lock);
1600         flush_workqueue(priv->workqueue);
1601         return 0;
1602 }
1603
1604 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1605                                 struct ieee80211_vif *vif,
1606                                 enum sta_notify_cmd notify_cmd,
1607                                 int link_id)
1608 {
1609         struct cw1200_common *priv = dev->priv;
1610         u32 bit, prev;
1611
1612         /* Zero link id means "for all link IDs" */
1613         if (link_id)
1614                 bit = BIT(link_id);
1615         else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1616                 bit = 0;
1617         else
1618                 bit = priv->link_id_map;
1619         prev = priv->sta_asleep_mask & bit;
1620
1621         switch (notify_cmd) {
1622         case STA_NOTIFY_SLEEP:
1623                 if (!prev) {
1624                         if (priv->buffered_multicasts &&
1625                             !priv->sta_asleep_mask)
1626                                 queue_work(priv->workqueue,
1627                                            &priv->multicast_start_work);
1628                         priv->sta_asleep_mask |= bit;
1629                 }
1630                 break;
1631         case STA_NOTIFY_AWAKE:
1632                 if (prev) {
1633                         priv->sta_asleep_mask &= ~bit;
1634                         priv->pspoll_mask &= ~bit;
1635                         if (priv->tx_multicast && link_id &&
1636                             !priv->sta_asleep_mask)
1637                                 queue_work(priv->workqueue,
1638                                            &priv->multicast_stop_work);
1639                         cw1200_bh_wakeup(priv);
1640                 }
1641                 break;
1642         }
1643 }
1644
1645 void cw1200_sta_notify(struct ieee80211_hw *dev,
1646                        struct ieee80211_vif *vif,
1647                        enum sta_notify_cmd notify_cmd,
1648                        struct ieee80211_sta *sta)
1649 {
1650         struct cw1200_common *priv = dev->priv;
1651         struct cw1200_sta_priv *sta_priv =
1652                 (struct cw1200_sta_priv *)&sta->drv_priv;
1653
1654         spin_lock_bh(&priv->ps_state_lock);
1655         __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1656         spin_unlock_bh(&priv->ps_state_lock);
1657 }
1658
1659 static void cw1200_ps_notify(struct cw1200_common *priv,
1660                       int link_id, bool ps)
1661 {
1662         if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1663                 return;
1664
1665         pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1666                  ps ? "Stop" : "Start",
1667                  link_id, priv->sta_asleep_mask);
1668
1669         __cw1200_sta_notify(priv->hw, priv->vif,
1670                             ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1671 }
1672
1673 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1674 {
1675         struct sk_buff *skb;
1676         struct wsm_update_ie update_ie = {
1677                 .what = WSM_UPDATE_IE_BEACON,
1678                 .count = 1,
1679         };
1680         u16 tim_offset, tim_length;
1681
1682         pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1683
1684         skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1685                         &tim_offset, &tim_length);
1686         if (!skb) {
1687                 if (!__cw1200_flush(priv, true))
1688                         wsm_unlock_tx(priv);
1689                 return -ENOENT;
1690         }
1691
1692         if (tim_offset && tim_length >= 6) {
1693                 /* Ignore DTIM count from mac80211:
1694                  * firmware handles DTIM internally.
1695                  */
1696                 skb->data[tim_offset + 2] = 0;
1697
1698                 /* Set/reset aid0 bit */
1699                 if (aid0_bit_set)
1700                         skb->data[tim_offset + 4] |= 1;
1701                 else
1702                         skb->data[tim_offset + 4] &= ~1;
1703         }
1704
1705         update_ie.ies = &skb->data[tim_offset];
1706         update_ie.length = tim_length;
1707         wsm_update_ie(priv, &update_ie);
1708
1709         dev_kfree_skb(skb);
1710
1711         return 0;
1712 }
1713
1714 void cw1200_set_tim_work(struct work_struct *work)
1715 {
1716         struct cw1200_common *priv =
1717                 container_of(work, struct cw1200_common, set_tim_work);
1718         (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1719 }
1720
1721 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1722                    bool set)
1723 {
1724         struct cw1200_common *priv = dev->priv;
1725         queue_work(priv->workqueue, &priv->set_tim_work);
1726         return 0;
1727 }
1728
1729 void cw1200_set_cts_work(struct work_struct *work)
1730 {
1731         struct cw1200_common *priv =
1732                 container_of(work, struct cw1200_common, set_cts_work);
1733
1734         u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1735         struct wsm_update_ie update_ie = {
1736                 .what = WSM_UPDATE_IE_BEACON,
1737                 .count = 1,
1738                 .ies = erp_ie,
1739                 .length = 3,
1740         };
1741         u32 erp_info;
1742         __le32 use_cts_prot;
1743         mutex_lock(&priv->conf_mutex);
1744         erp_info = priv->erp_info;
1745         mutex_unlock(&priv->conf_mutex);
1746         use_cts_prot =
1747                 erp_info & WLAN_ERP_USE_PROTECTION ?
1748                 __cpu_to_le32(1) : 0;
1749
1750         erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1751
1752         pr_debug("[STA] ERP information 0x%x\n", erp_info);
1753
1754         wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1755                       &use_cts_prot, sizeof(use_cts_prot));
1756         wsm_update_ie(priv, &update_ie);
1757
1758         return;
1759 }
1760
1761 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1762 {
1763         struct wsm_override_internal_txrate arg;
1764         int ret = 0;
1765
1766         if (priv->mode == NL80211_IFTYPE_STATION) {
1767                 /* Plumb PSPOLL and NULL template */
1768                 cw1200_upload_pspoll(priv);
1769                 cw1200_upload_null(priv);
1770                 cw1200_upload_qosnull(priv);
1771         } else {
1772                 return 0;
1773         }
1774
1775         memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1776
1777         if (!priv->vif->p2p) {
1778                 /* STATION mode */
1779                 if (priv->bss_params.operational_rate_set & ~0xF) {
1780                         pr_debug("[STA] STA has ERP rates\n");
1781                         /* G or BG mode */
1782                         arg.internalTxRate = (__ffs(
1783                         priv->bss_params.operational_rate_set & ~0xF));
1784                 } else {
1785                         pr_debug("[STA] STA has non ERP rates\n");
1786                         /* B only mode */
1787                         arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1788                 }
1789                 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1790         } else {
1791                 /* P2P mode */
1792                 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1793                 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1794         }
1795
1796         pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1797                  priv->mode,
1798                  arg.internalTxRate,
1799                  arg.nonErpInternalTxRate);
1800
1801         ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1802                             &arg, sizeof(arg));
1803
1804         return ret;
1805 }
1806
1807 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1808                              struct ieee80211_vif *vif,
1809                              struct ieee80211_bss_conf *info,
1810                              u32 changed)
1811 {
1812         struct cw1200_common *priv = dev->priv;
1813         bool do_join = false;
1814
1815         mutex_lock(&priv->conf_mutex);
1816
1817         pr_debug("BSS CHANGED:  %08x\n", changed);
1818
1819         /* TODO: BSS_CHANGED_QOS */
1820         /* TODO: BSS_CHANGED_TXPOWER */
1821
1822         if (changed & BSS_CHANGED_ARP_FILTER) {
1823                 struct wsm_mib_arp_ipv4_filter filter = {0};
1824                 int i;
1825
1826                 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1827                          info->arp_addr_cnt);
1828
1829                 /* Currently only one IP address is supported by firmware.
1830                  * In case of more IPs arp filtering will be disabled.
1831                  */
1832                 if (info->arp_addr_cnt > 0 &&
1833                     info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1834                         for (i = 0; i < info->arp_addr_cnt; i++) {
1835                                 filter.ipv4addrs[i] = info->arp_addr_list[i];
1836                                 pr_debug("[STA] addr[%d]: 0x%X\n",
1837                                          i, filter.ipv4addrs[i]);
1838                         }
1839                         filter.enable = __cpu_to_le32(1);
1840                 }
1841
1842                 pr_debug("[STA] arp ip filter enable: %d\n",
1843                          __le32_to_cpu(filter.enable));
1844
1845                 wsm_set_arp_ipv4_filter(priv, &filter);
1846         }
1847
1848         if (changed &
1849             (BSS_CHANGED_BEACON |
1850              BSS_CHANGED_AP_PROBE_RESP |
1851              BSS_CHANGED_BSSID |
1852              BSS_CHANGED_SSID |
1853              BSS_CHANGED_IBSS)) {
1854                 pr_debug("BSS_CHANGED_BEACON\n");
1855                 priv->beacon_int = info->beacon_int;
1856                 cw1200_update_beaconing(priv);
1857                 cw1200_upload_beacon(priv);
1858         }
1859
1860         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1861                 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1862
1863                 if (priv->enable_beacon != info->enable_beacon) {
1864                         cw1200_enable_beaconing(priv, info->enable_beacon);
1865                         priv->enable_beacon = info->enable_beacon;
1866                 }
1867         }
1868
1869         if (changed & BSS_CHANGED_BEACON_INT) {
1870                 pr_debug("CHANGED_BEACON_INT\n");
1871                 if (info->ibss_joined)
1872                         do_join = true;
1873                 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1874                         cw1200_update_beaconing(priv);
1875         }
1876
1877         /* assoc/disassoc, or maybe AID changed */
1878         if (changed & BSS_CHANGED_ASSOC) {
1879                 wsm_lock_tx(priv);
1880                 priv->wep_default_key_id = -1;
1881                 wsm_unlock_tx(priv);
1882         }
1883
1884         if (changed & BSS_CHANGED_BSSID) {
1885                 pr_debug("BSS_CHANGED_BSSID\n");
1886                 do_join = true;
1887         }
1888
1889         if (changed &
1890             (BSS_CHANGED_ASSOC |
1891              BSS_CHANGED_BSSID |
1892              BSS_CHANGED_IBSS |
1893              BSS_CHANGED_BASIC_RATES |
1894              BSS_CHANGED_HT)) {
1895                 pr_debug("BSS_CHANGED_ASSOC\n");
1896                 if (info->assoc) {
1897                         if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1898                                 ieee80211_connection_loss(vif);
1899                                 mutex_unlock(&priv->conf_mutex);
1900                                 return;
1901                         } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1902                                 priv->join_status = CW1200_JOIN_STATUS_STA;
1903                         }
1904                 } else {
1905                         do_join = true;
1906                 }
1907
1908                 if (info->assoc || info->ibss_joined) {
1909                         struct ieee80211_sta *sta = NULL;
1910                         __le32 htprot = 0;
1911
1912                         if (info->dtim_period)
1913                                 priv->join_dtim_period = info->dtim_period;
1914                         priv->beacon_int = info->beacon_int;
1915
1916                         rcu_read_lock();
1917
1918                         if (info->bssid && !info->ibss_joined)
1919                                 sta = ieee80211_find_sta(vif, info->bssid);
1920                         if (sta) {
1921                                 priv->ht_info.ht_cap = sta->ht_cap;
1922                                 priv->bss_params.operational_rate_set =
1923                                         cw1200_rate_mask_to_wsm(priv,
1924                                                                 sta->supp_rates[priv->channel->band]);
1925                                 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1926                                 priv->ht_info.operation_mode = info->ht_operation_mode;
1927                         } else {
1928                                 memset(&priv->ht_info, 0,
1929                                        sizeof(priv->ht_info));
1930                                 priv->bss_params.operational_rate_set = -1;
1931                         }
1932                         rcu_read_unlock();
1933
1934                         /* Non Greenfield stations present */
1935                         if (priv->ht_info.operation_mode &
1936                             IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1937                                 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1938
1939                         /* Set HT protection method */
1940                         htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1941
1942                         /* TODO:
1943                          * STBC_param.dual_cts
1944                          *  STBC_param.LSIG_TXOP_FILL
1945                          */
1946
1947                         wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1948                                       &htprot, sizeof(htprot));
1949
1950                         priv->association_mode.greenfield =
1951                                 cw1200_ht_greenfield(&priv->ht_info);
1952                         priv->association_mode.flags =
1953                                 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1954                                 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1955                                 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1956                                 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1957                                 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1958                         priv->association_mode.preamble =
1959                                 info->use_short_preamble ?
1960                                 WSM_JOIN_PREAMBLE_SHORT :
1961                                 WSM_JOIN_PREAMBLE_LONG;
1962                         priv->association_mode.basic_rate_set = __cpu_to_le32(
1963                                 cw1200_rate_mask_to_wsm(priv,
1964                                                         info->basic_rates));
1965                         priv->association_mode.mpdu_start_spacing =
1966                                 cw1200_ht_ampdu_density(&priv->ht_info);
1967
1968                         cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1969                         cancel_work_sync(&priv->unjoin_work);
1970
1971                         priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1972                         priv->bss_params.aid = info->aid;
1973
1974                         if (priv->join_dtim_period < 1)
1975                                 priv->join_dtim_period = 1;
1976
1977                         pr_debug("[STA] DTIM %d, interval: %d\n",
1978                                  priv->join_dtim_period, priv->beacon_int);
1979                         pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1980                                  priv->association_mode.preamble,
1981                                  priv->association_mode.greenfield,
1982                                  priv->bss_params.aid,
1983                                  priv->bss_params.operational_rate_set,
1984                                  priv->association_mode.basic_rate_set);
1985                         wsm_set_association_mode(priv, &priv->association_mode);
1986
1987                         if (!info->ibss_joined) {
1988                                 wsm_keep_alive_period(priv, 30 /* sec */);
1989                                 wsm_set_bss_params(priv, &priv->bss_params);
1990                                 priv->setbssparams_done = true;
1991                                 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1992                                 cw1200_set_pm(priv, &priv->powersave_mode);
1993                         }
1994                         if (priv->vif->p2p) {
1995                                 pr_debug("[STA] Setting p2p powersave configuration.\n");
1996                                 wsm_set_p2p_ps_modeinfo(priv,
1997                                                         &priv->p2p_ps_modeinfo);
1998                         }
1999                         if (priv->bt_present)
2000                                 cw1200_set_btcoexinfo(priv);
2001                 } else {
2002                         memset(&priv->association_mode, 0,
2003                                sizeof(priv->association_mode));
2004                         memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2005                 }
2006         }
2007
2008         /* ERP Protection */
2009         if (changed & (BSS_CHANGED_ASSOC |
2010                        BSS_CHANGED_ERP_CTS_PROT |
2011                        BSS_CHANGED_ERP_PREAMBLE)) {
2012                 u32 prev_erp_info = priv->erp_info;
2013                 if (info->use_cts_prot)
2014                         priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2015                 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2016                         priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2017
2018                 if (info->use_short_preamble)
2019                         priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2020                 else
2021                         priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2022
2023                 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2024
2025                 if (prev_erp_info != priv->erp_info)
2026                         queue_work(priv->workqueue, &priv->set_cts_work);
2027         }
2028
2029         /* ERP Slottime */
2030         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2031                 __le32 slot_time = info->use_short_slot ?
2032                         __cpu_to_le32(9) : __cpu_to_le32(20);
2033                 pr_debug("[STA] Slot time: %d us.\n",
2034                          __le32_to_cpu(slot_time));
2035                 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2036                               &slot_time, sizeof(slot_time));
2037         }
2038
2039         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2040                 struct wsm_rcpi_rssi_threshold threshold = {
2041                         .rollingAverageCount = 8,
2042                 };
2043                 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2044                          info->cqm_rssi_thold, info->cqm_rssi_hyst);
2045                 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2046                 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2047
2048                 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2049                         /* RSSI subscription enabled */
2050                         /* TODO: It's not a correct way of setting threshold.
2051                          * Upper and lower must be set equal here and adjusted
2052                          * in callback. However current implementation is much
2053                          * more relaible and stable.
2054                          */
2055
2056                         /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2057                          * RSSI = RCPI / 2 - 110
2058                          */
2059                         if (priv->cqm_use_rssi) {
2060                                 threshold.upperThreshold =
2061                                         info->cqm_rssi_thold + info->cqm_rssi_hyst;
2062                                 threshold.lowerThreshold =
2063                                         info->cqm_rssi_thold;
2064                                 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2065                         } else {
2066                                 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2067                                 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2068                         }
2069                         threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2070                 } else {
2071                         /* There is a bug in FW, see sta.c. We have to enable
2072                          * dummy subscription to get correct RSSI values.
2073                          */
2074                         threshold.rssiRcpiMode |=
2075                                 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2076                                 WSM_RCPI_RSSI_DONT_USE_UPPER |
2077                                 WSM_RCPI_RSSI_DONT_USE_LOWER;
2078                         if (priv->cqm_use_rssi)
2079                                 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2080                 }
2081                 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2082         }
2083         mutex_unlock(&priv->conf_mutex);
2084
2085         if (do_join) {
2086                 wsm_lock_tx(priv);
2087                 cw1200_do_join(priv); /* Will unlock it for us */
2088         }
2089 }
2090
2091 void cw1200_multicast_start_work(struct work_struct *work)
2092 {
2093         struct cw1200_common *priv =
2094                 container_of(work, struct cw1200_common, multicast_start_work);
2095         long tmo = priv->join_dtim_period *
2096                         (priv->beacon_int + 20) * HZ / 1024;
2097
2098         cancel_work_sync(&priv->multicast_stop_work);
2099
2100         if (!priv->aid0_bit_set) {
2101                 wsm_lock_tx(priv);
2102                 cw1200_set_tim_impl(priv, true);
2103                 priv->aid0_bit_set = true;
2104                 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2105                 wsm_unlock_tx(priv);
2106         }
2107 }
2108
2109 void cw1200_multicast_stop_work(struct work_struct *work)
2110 {
2111         struct cw1200_common *priv =
2112                 container_of(work, struct cw1200_common, multicast_stop_work);
2113
2114         if (priv->aid0_bit_set) {
2115                 del_timer_sync(&priv->mcast_timeout);
2116                 wsm_lock_tx(priv);
2117                 priv->aid0_bit_set = false;
2118                 cw1200_set_tim_impl(priv, false);
2119                 wsm_unlock_tx(priv);
2120         }
2121 }
2122
2123 void cw1200_mcast_timeout(unsigned long arg)
2124 {
2125         struct cw1200_common *priv =
2126                 (struct cw1200_common *)arg;
2127
2128         wiphy_warn(priv->hw->wiphy,
2129                    "Multicast delivery timeout.\n");
2130         spin_lock_bh(&priv->ps_state_lock);
2131         priv->tx_multicast = priv->aid0_bit_set &&
2132                         priv->buffered_multicasts;
2133         if (priv->tx_multicast)
2134                 cw1200_bh_wakeup(priv);
2135         spin_unlock_bh(&priv->ps_state_lock);
2136 }
2137
2138 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2139                         struct ieee80211_vif *vif,
2140                         enum ieee80211_ampdu_mlme_action action,
2141                         struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2142                         u8 buf_size)
2143 {
2144         /* Aggregation is implemented fully in firmware,
2145          * including block ack negotiation. Do not allow
2146          * mac80211 stack to do anything: it interferes with
2147          * the firmware.
2148          */
2149
2150         /* Note that we still need this function stubbed. */
2151         return -ENOTSUPP;
2152 }
2153
2154 /* ******************************************************************** */
2155 /* WSM callback                                                         */
2156 void cw1200_suspend_resume(struct cw1200_common *priv,
2157                           struct wsm_suspend_resume *arg)
2158 {
2159         pr_debug("[AP] %s: %s\n",
2160                  arg->stop ? "stop" : "start",
2161                  arg->multicast ? "broadcast" : "unicast");
2162
2163         if (arg->multicast) {
2164                 bool cancel_tmo = false;
2165                 spin_lock_bh(&priv->ps_state_lock);
2166                 if (arg->stop) {
2167                         priv->tx_multicast = false;
2168                 } else {
2169                         /* Firmware sends this indication every DTIM if there
2170                          * is a STA in powersave connected. There is no reason
2171                          * to suspend, following wakeup will consume much more
2172                          * power than it could be saved.
2173                          */
2174                         cw1200_pm_stay_awake(&priv->pm_state,
2175                                              priv->join_dtim_period *
2176                                              (priv->beacon_int + 20) * HZ / 1024);
2177                         priv->tx_multicast = (priv->aid0_bit_set &&
2178                                               priv->buffered_multicasts);
2179                         if (priv->tx_multicast) {
2180                                 cancel_tmo = true;
2181                                 cw1200_bh_wakeup(priv);
2182                         }
2183                 }
2184                 spin_unlock_bh(&priv->ps_state_lock);
2185                 if (cancel_tmo)
2186                         del_timer_sync(&priv->mcast_timeout);
2187         } else {
2188                 spin_lock_bh(&priv->ps_state_lock);
2189                 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2190                 spin_unlock_bh(&priv->ps_state_lock);
2191                 if (!arg->stop)
2192                         cw1200_bh_wakeup(priv);
2193         }
2194         return;
2195 }
2196
2197 /* ******************************************************************** */
2198 /* AP privates                                                          */
2199
2200 static int cw1200_upload_beacon(struct cw1200_common *priv)
2201 {
2202         int ret = 0;
2203         struct ieee80211_mgmt *mgmt;
2204         struct wsm_template_frame frame = {
2205                 .frame_type = WSM_FRAME_TYPE_BEACON,
2206         };
2207
2208         u16 tim_offset;
2209         u16 tim_len;
2210
2211         if (priv->mode == NL80211_IFTYPE_STATION ||
2212             priv->mode == NL80211_IFTYPE_MONITOR ||
2213             priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2214                 goto done;
2215
2216         if (priv->vif->p2p)
2217                 frame.rate = WSM_TRANSMIT_RATE_6;
2218
2219         frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2220                                              &tim_offset, &tim_len);
2221         if (!frame.skb)
2222                 return -ENOMEM;
2223
2224         ret = wsm_set_template_frame(priv, &frame);
2225
2226         if (ret)
2227                 goto done;
2228
2229         /* TODO: Distill probe resp; remove TIM
2230          * and any other beacon-specific IEs
2231          */
2232         mgmt = (void *)frame.skb->data;
2233         mgmt->frame_control =
2234                 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2235                               IEEE80211_STYPE_PROBE_RESP);
2236
2237         frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2238         if (priv->vif->p2p) {
2239                 ret = wsm_set_probe_responder(priv, true);
2240         } else {
2241                 ret = wsm_set_template_frame(priv, &frame);
2242                 wsm_set_probe_responder(priv, false);
2243         }
2244
2245 done:
2246         dev_kfree_skb(frame.skb);
2247
2248         return ret;
2249 }
2250
2251 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2252 {
2253         int ret = 0;
2254         struct wsm_template_frame frame = {
2255                 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2256                 .rate = 0xFF,
2257         };
2258
2259
2260         frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2261         if (!frame.skb)
2262                 return -ENOMEM;
2263
2264         ret = wsm_set_template_frame(priv, &frame);
2265
2266         dev_kfree_skb(frame.skb);
2267
2268         return ret;
2269 }
2270
2271 static int cw1200_upload_null(struct cw1200_common *priv)
2272 {
2273         int ret = 0;
2274         struct wsm_template_frame frame = {
2275                 .frame_type = WSM_FRAME_TYPE_NULL,
2276                 .rate = 0xFF,
2277         };
2278
2279         frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2280         if (!frame.skb)
2281                 return -ENOMEM;
2282
2283         ret = wsm_set_template_frame(priv, &frame);
2284
2285         dev_kfree_skb(frame.skb);
2286
2287         return ret;
2288 }
2289
2290 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2291 {
2292         /* TODO:  This needs to be implemented
2293
2294         struct wsm_template_frame frame = {
2295                 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2296                 .rate = 0xFF,
2297         };
2298
2299         frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2300         if (!frame.skb)
2301                 return -ENOMEM;
2302
2303         ret = wsm_set_template_frame(priv, &frame);
2304
2305         dev_kfree_skb(frame.skb);
2306
2307         */
2308         return 0;
2309 }
2310
2311 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2312                                    bool enable)
2313 {
2314         struct wsm_beacon_transmit transmit = {
2315                 .enable_beaconing = enable,
2316         };
2317
2318         return wsm_beacon_transmit(priv, &transmit);
2319 }
2320
2321 static int cw1200_start_ap(struct cw1200_common *priv)
2322 {
2323         int ret;
2324         struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2325         struct wsm_start start = {
2326                 .mode = priv->vif->p2p ?
2327                                 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2328                 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2329                                 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2330                 .channel_number = priv->channel->hw_value,
2331                 .beacon_interval = conf->beacon_int,
2332                 .dtim_period = conf->dtim_period,
2333                 .preamble = conf->use_short_preamble ?
2334                                 WSM_JOIN_PREAMBLE_SHORT :
2335                                 WSM_JOIN_PREAMBLE_LONG,
2336                 .probe_delay = 100,
2337                 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2338                                 conf->basic_rates),
2339         };
2340         struct wsm_operational_mode mode = {
2341                 .power_mode = cw1200_power_mode,
2342                 .disable_more_flag_usage = true,
2343         };
2344
2345         memset(start.ssid, 0, sizeof(start.ssid));
2346         if (!conf->hidden_ssid) {
2347                 start.ssid_len = conf->ssid_len;
2348                 memcpy(start.ssid, conf->ssid, start.ssid_len);
2349         }
2350
2351         priv->beacon_int = conf->beacon_int;
2352         priv->join_dtim_period = conf->dtim_period;
2353
2354         memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2355
2356         pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2357                  start.channel_number, start.band,
2358                  start.beacon_interval, start.dtim_period,
2359                  start.basic_rate_set,
2360                  start.ssid_len, start.ssid);
2361         ret = wsm_start(priv, &start);
2362         if (!ret)
2363                 ret = cw1200_upload_keys(priv);
2364         if (!ret && priv->vif->p2p) {
2365                 pr_debug("[AP] Setting p2p powersave configuration.\n");
2366                 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2367         }
2368         if (!ret) {
2369                 wsm_set_block_ack_policy(priv, 0, 0);
2370                 priv->join_status = CW1200_JOIN_STATUS_AP;
2371                 cw1200_update_filtering(priv);
2372         }
2373         wsm_set_operational_mode(priv, &mode);
2374         return ret;
2375 }
2376
2377 static int cw1200_update_beaconing(struct cw1200_common *priv)
2378 {
2379         struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2380         struct wsm_reset reset = {
2381                 .link_id = 0,
2382                 .reset_statistics = true,
2383         };
2384
2385         if (priv->mode == NL80211_IFTYPE_AP) {
2386                 /* TODO: check if changed channel, band */
2387                 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2388                     priv->beacon_int != conf->beacon_int) {
2389                         pr_debug("ap restarting\n");
2390                         wsm_lock_tx(priv);
2391                         if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2392                                 wsm_reset(priv, &reset);
2393                         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2394                         cw1200_start_ap(priv);
2395                         wsm_unlock_tx(priv);
2396                 } else
2397                         pr_debug("ap started join_status: %d\n",
2398                                  priv->join_status);
2399         }
2400         return 0;
2401 }