st/cw1200/sta.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Mac80211 STA API for ST-Ericsson CW1200 drivers
0004  *
0005  * Copyright (c) 2010, ST-Ericsson
0006  * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
0007  */
0008
0009 #include <linux/vmalloc.h>
0010 #include <linux/sched.h>
0011 #include <linux/firmware.h>
0012 #include <linux/module.h>
0013 #include <linux/etherdevice.h>
0014
0015 #include "cw1200.h"
0016 #include "sta.h"
0017 #include "fwio.h"
0018 #include "bh.h"
0019 #include "debug.h"
0020
0021 #ifndef ERP_INFO_BYTE_OFFSET
0022 #define ERP_INFO_BYTE_OFFSET 2
0023 #endif
0024
0025 static void cw1200_do_join(struct cw1200_common *priv);
0026 static void cw1200_do_unjoin(struct cw1200_common *priv);
0027
0028 static int cw1200_upload_beacon(struct cw1200_common *priv);
0029 static int cw1200_upload_pspoll(struct cw1200_common *priv);
0030 static int cw1200_upload_null(struct cw1200_common *priv);
0031 static int cw1200_upload_qosnull(struct cw1200_common *priv);
0032 static int cw1200_start_ap(struct cw1200_common *priv);
0033 static int cw1200_update_beaconing(struct cw1200_common *priv);
0034 static int cw1200_enable_beaconing(struct cw1200_common *priv,
0035                    bool enable);
0036 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
0037                 struct ieee80211_vif *vif,
0038                 enum sta_notify_cmd notify_cmd,
0039                 int link_id);
0040 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
0041
0042 static inline void __cw1200_free_event_queue(struct list_head *list)
0043 {
0044     struct cw1200_wsm_event *event, *tmp;
0045     list_for_each_entry_safe(event, tmp, list, link) {
0046         list_del(&event->link);
0047         kfree(event);
0048     }
0049 }
0050
0051 /* ******************************************************************** */
0052 /* STA API                              */
0053
0054 int cw1200_start(struct ieee80211_hw *dev)
0055 {
0056     struct cw1200_common *priv = dev->priv;
0057     int ret = 0;
0058
0059     cw1200_pm_stay_awake(&priv->pm_state, HZ);
0060
0061     mutex_lock(&priv->conf_mutex);
0062
0063     /* default EDCA */
0064     WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
0065     WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
0066     WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
0067     WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
0068     ret = wsm_set_edca_params(priv, &priv->edca);
0069     if (ret)
0070         goto out;
0071
0072     ret = cw1200_set_uapsd_param(priv, &priv->edca);
0073     if (ret)
0074         goto out;
0075
0076     priv->setbssparams_done = false;
0077
0078     memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
0079     priv->mode = NL80211_IFTYPE_MONITOR;
0080     priv->wep_default_key_id = -1;
0081
0082     priv->cqm_beacon_loss_count = 10;
0083
0084     ret = cw1200_setup_mac(priv);
0085     if (ret)
0086         goto out;
0087
0088 out:
0089     mutex_unlock(&priv->conf_mutex);
0090     return ret;
0091 }
0092
0093 void cw1200_stop(struct ieee80211_hw *dev)
0094 {
0095     struct cw1200_common *priv = dev->priv;
0096     LIST_HEAD(list);
0097     int i;
0098
0099     wsm_lock_tx(priv);
0100
0101     while (down_trylock(&priv->scan.lock)) {
0102         /* Scan is in progress. Force it to stop. */
0103         priv->scan.req = NULL;
0104         schedule();
0105     }
0106     up(&priv->scan.lock);
0107
0108     cancel_delayed_work_sync(&priv->scan.probe_work);
0109     cancel_delayed_work_sync(&priv->scan.timeout);
0110     cancel_delayed_work_sync(&priv->clear_recent_scan_work);
0111     cancel_delayed_work_sync(&priv->join_timeout);
0112     cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
0113     cancel_work_sync(&priv->unjoin_work);
0114     cancel_delayed_work_sync(&priv->link_id_gc_work);
0115     flush_workqueue(priv->workqueue);
0116     del_timer_sync(&priv->mcast_timeout);
0117     mutex_lock(&priv->conf_mutex);
0118     priv->mode = NL80211_IFTYPE_UNSPECIFIED;
0119     priv->listening = false;
0120
0121     spin_lock(&priv->event_queue_lock);
0122     list_splice_init(&priv->event_queue, &list);
0123     spin_unlock(&priv->event_queue_lock);
0124     __cw1200_free_event_queue(&list);
0125
0126
0127     priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
0128     priv->join_pending = false;
0129
0130     for (i = 0; i < 4; i++)
0131         cw1200_queue_clear(&priv->tx_queue[i]);
0132     mutex_unlock(&priv->conf_mutex);
0133     tx_policy_clean(priv);
0134
0135     /* HACK! */
0136     if (atomic_xchg(&priv->tx_lock, 1) != 1)
0137         pr_debug("[STA] TX is force-unlocked due to stop request.\n");
0138
0139     wsm_unlock_tx(priv);
0140     atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
0141 }
0142
0143 static int cw1200_bssloss_mitigation = 1;
0144 module_param(cw1200_bssloss_mitigation, int, 0644);
0145 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
0146
0147
0148 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
0149                  int init, int good, int bad)
0150 {
0151     int tx = 0;
0152
0153     priv->delayed_link_loss = 0;
0154     cancel_work_sync(&priv->bss_params_work);
0155
0156     pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
0157          priv->bss_loss_state,
0158          init, good, bad,
0159          atomic_read(&priv->tx_lock),
0160          priv->delayed_unjoin);
0161
0162     /* If we have a pending unjoin */
0163     if (priv->delayed_unjoin)
0164         return;
0165
0166     if (init) {
0167         queue_delayed_work(priv->workqueue,
0168                    &priv->bss_loss_work,
0169                    HZ);
0170         priv->bss_loss_state = 0;
0171
0172         /* Skip the confimration procedure in P2P case */
0173         if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
0174             tx = 1;
0175     } else if (good) {
0176         cancel_delayed_work_sync(&priv->bss_loss_work);
0177         priv->bss_loss_state = 0;
0178         queue_work(priv->workqueue, &priv->bss_params_work);
0179     } else if (bad) {
0180         /* XXX Should we just keep going until we time out? */
0181         if (priv->bss_loss_state < 3)
0182             tx = 1;
0183     } else {
0184         cancel_delayed_work_sync(&priv->bss_loss_work);
0185         priv->bss_loss_state = 0;
0186     }
0187
0188     /* Bypass mitigation if it's disabled */
0189     if (!cw1200_bssloss_mitigation)
0190         tx = 0;
0191
0192     /* Spit out a NULL packet to our AP if necessary */
0193     if (tx) {
0194         struct sk_buff *skb;
0195
0196         priv->bss_loss_state++;
0197
0198         skb = ieee80211_nullfunc_get(priv->hw, priv->vif, false);
0199         WARN_ON(!skb);
0200         if (skb)
0201             cw1200_tx(priv->hw, NULL, skb);
0202     }
0203 }
0204
0205 int cw1200_add_interface(struct ieee80211_hw *dev,
0206              struct ieee80211_vif *vif)
0207 {
0208     int ret;
0209     struct cw1200_common *priv = dev->priv;
0210     /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
0211
0212     vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
0213                  IEEE80211_VIF_SUPPORTS_UAPSD |
0214                  IEEE80211_VIF_SUPPORTS_CQM_RSSI;
0215
0216     mutex_lock(&priv->conf_mutex);
0217
0218     if (priv->mode != NL80211_IFTYPE_MONITOR) {
0219         mutex_unlock(&priv->conf_mutex);
0220         return -EOPNOTSUPP;
0221     }
0222
0223     switch (vif->type) {
0224     case NL80211_IFTYPE_STATION:
0225     case NL80211_IFTYPE_ADHOC:
0226     case NL80211_IFTYPE_MESH_POINT:
0227     case NL80211_IFTYPE_AP:
0228         priv->mode = vif->type;
0229         break;
0230     default:
0231         mutex_unlock(&priv->conf_mutex);
0232         return -EOPNOTSUPP;
0233     }
0234
0235     priv->vif = vif;
0236     memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
0237     ret = cw1200_setup_mac(priv);
0238     /* Enable auto-calibration */
0239     /* Exception in subsequent channel switch; disabled.
0240      *  wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
0241      *      &auto_calibration_mode, sizeof(auto_calibration_mode));
0242     */
0243
0244     mutex_unlock(&priv->conf_mutex);
0245     return ret;
0246 }
0247
0248 void cw1200_remove_interface(struct ieee80211_hw *dev,
0249                  struct ieee80211_vif *vif)
0250 {
0251     struct cw1200_common *priv = dev->priv;
0252     struct wsm_reset reset = {
0253         .reset_statistics = true,
0254     };
0255     int i;
0256
0257     mutex_lock(&priv->conf_mutex);
0258     switch (priv->join_status) {
0259     case CW1200_JOIN_STATUS_JOINING:
0260     case CW1200_JOIN_STATUS_PRE_STA:
0261     case CW1200_JOIN_STATUS_STA:
0262     case CW1200_JOIN_STATUS_IBSS:
0263         wsm_lock_tx(priv);
0264         if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
0265             wsm_unlock_tx(priv);
0266         break;
0267     case CW1200_JOIN_STATUS_AP:
0268         for (i = 0; priv->link_id_map; ++i) {
0269             if (priv->link_id_map & BIT(i)) {
0270                 reset.link_id = i;
0271                 wsm_reset(priv, &reset);
0272                 priv->link_id_map &= ~BIT(i);
0273             }
0274         }
0275         memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
0276         priv->sta_asleep_mask = 0;
0277         priv->enable_beacon = false;
0278         priv->tx_multicast = false;
0279         priv->aid0_bit_set = false;
0280         priv->buffered_multicasts = false;
0281         priv->pspoll_mask = 0;
0282         reset.link_id = 0;
0283         wsm_reset(priv, &reset);
0284         break;
0285     case CW1200_JOIN_STATUS_MONITOR:
0286         cw1200_update_listening(priv, false);
0287         break;
0288     default:
0289         break;
0290     }
0291     priv->vif = NULL;
0292     priv->mode = NL80211_IFTYPE_MONITOR;
0293     eth_zero_addr(priv->mac_addr);
0294     memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
0295     cw1200_free_keys(priv);
0296     cw1200_setup_mac(priv);
0297     priv->listening = false;
0298     priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
0299     if (!__cw1200_flush(priv, true))
0300         wsm_unlock_tx(priv);
0301
0302     mutex_unlock(&priv->conf_mutex);
0303 }
0304
0305 int cw1200_change_interface(struct ieee80211_hw *dev,
0306                 struct ieee80211_vif *vif,
0307                 enum nl80211_iftype new_type,
0308                 bool p2p)
0309 {
0310     int ret = 0;
0311     pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
0312          p2p, vif->type, vif->p2p);
0313
0314     if (new_type != vif->type || vif->p2p != p2p) {
0315         cw1200_remove_interface(dev, vif);
0316         vif->type = new_type;
0317         vif->p2p = p2p;
0318         ret = cw1200_add_interface(dev, vif);
0319     }
0320
0321     return ret;
0322 }
0323
0324 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
0325 {
0326     int ret = 0;
0327     struct cw1200_common *priv = dev->priv;
0328     struct ieee80211_conf *conf = &dev->conf;
0329
0330     pr_debug("CONFIG CHANGED:  %08x\n", changed);
0331
0332     down(&priv->scan.lock);
0333     mutex_lock(&priv->conf_mutex);
0334     /* TODO: IEEE80211_CONF_CHANGE_QOS */
0335     /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
0336
0337     if (changed & IEEE80211_CONF_CHANGE_POWER) {
0338         priv->output_power = conf->power_level;
0339         pr_debug("[STA] TX power: %d\n", priv->output_power);
0340         wsm_set_output_power(priv, priv->output_power * 10);
0341     }
0342
0343     if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
0344         (priv->channel != conf->chandef.chan)) {
0345         struct ieee80211_channel *ch = conf->chandef.chan;
0346         struct wsm_switch_channel channel = {
0347             .channel_number = ch->hw_value,
0348         };
0349         pr_debug("[STA] Freq %d (wsm ch: %d).\n",
0350              ch->center_freq, ch->hw_value);
0351
0352         /* __cw1200_flush() implicitly locks tx, if successful */
0353         if (!__cw1200_flush(priv, false)) {
0354             if (!wsm_switch_channel(priv, &channel)) {
0355                 ret = wait_event_timeout(priv->channel_switch_done,
0356                              !priv->channel_switch_in_progress,
0357                              3 * HZ);
0358                 if (ret) {
0359                     /* Already unlocks if successful */
0360                     priv->channel = ch;
0361                     ret = 0;
0362                 } else {
0363                     ret = -ETIMEDOUT;
0364                 }
0365             } else {
0366                 /* Unlock if switch channel fails */
0367                 wsm_unlock_tx(priv);
0368             }
0369         }
0370     }
0371
0372     if (changed & IEEE80211_CONF_CHANGE_PS) {
0373         if (!(conf->flags & IEEE80211_CONF_PS))
0374             priv->powersave_mode.mode = WSM_PSM_ACTIVE;
0375         else if (conf->dynamic_ps_timeout <= 0)
0376             priv->powersave_mode.mode = WSM_PSM_PS;
0377         else
0378             priv->powersave_mode.mode = WSM_PSM_FAST_PS;
0379
0380         /* Firmware requires that value for this 1-byte field must
0381          * be specified in units of 500us. Values above the 128ms
0382          * threshold are not supported.
0383          */
0384         if (conf->dynamic_ps_timeout >= 0x80)
0385             priv->powersave_mode.fast_psm_idle_period = 0xFF;
0386         else
0387             priv->powersave_mode.fast_psm_idle_period =
0388                     conf->dynamic_ps_timeout << 1;
0389
0390         if (priv->join_status == CW1200_JOIN_STATUS_STA &&
0391             priv->bss_params.aid)
0392             cw1200_set_pm(priv, &priv->powersave_mode);
0393     }
0394
0395     if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
0396         /* TBD: It looks like it's transparent
0397          * there's a monitor interface present -- use this
0398          * to determine for example whether to calculate
0399          * timestamps for packets or not, do not use instead
0400          * of filter flags!
0401          */
0402     }
0403
0404     if (changed & IEEE80211_CONF_CHANGE_IDLE) {
0405         struct wsm_operational_mode mode = {
0406             .power_mode = cw1200_power_mode,
0407             .disable_more_flag_usage = true,
0408         };
0409
0410         wsm_lock_tx(priv);
0411         /* Disable p2p-dev mode forced by TX request */
0412         if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
0413             (conf->flags & IEEE80211_CONF_IDLE) &&
0414             !priv->listening) {
0415             cw1200_disable_listening(priv);
0416             priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
0417         }
0418         wsm_set_operational_mode(priv, &mode);
0419         wsm_unlock_tx(priv);
0420     }
0421
0422     if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
0423         pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
0424              conf->long_frame_max_tx_count,
0425              conf->short_frame_max_tx_count);
0426         spin_lock_bh(&priv->tx_policy_cache.lock);
0427         priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
0428         priv->short_frame_max_tx_count =
0429             (conf->short_frame_max_tx_count < 0x0F) ?
0430             conf->short_frame_max_tx_count : 0x0F;
0431         priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
0432         spin_unlock_bh(&priv->tx_policy_cache.lock);
0433     }
0434     mutex_unlock(&priv->conf_mutex);
0435     up(&priv->scan.lock);
0436     return ret;
0437 }
0438
0439 void cw1200_update_filtering(struct cw1200_common *priv)
0440 {
0441     int ret;
0442     bool bssid_filtering = !priv->rx_filter.bssid;
0443     bool is_p2p = priv->vif && priv->vif->p2p;
0444     bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
0445
0446     static struct wsm_beacon_filter_control bf_ctrl;
0447     static struct wsm_mib_beacon_filter_table bf_tbl = {
0448         .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
0449         .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
0450                     WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
0451                     WSM_BEACON_FILTER_IE_HAS_APPEARED,
0452         .entry[0].oui[0] = 0x50,
0453         .entry[0].oui[1] = 0x6F,
0454         .entry[0].oui[2] = 0x9A,
0455         .entry[1].ie_id = WLAN_EID_HT_OPERATION,
0456         .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
0457                     WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
0458                     WSM_BEACON_FILTER_IE_HAS_APPEARED,
0459         .entry[2].ie_id = WLAN_EID_ERP_INFO,
0460         .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
0461                     WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
0462                     WSM_BEACON_FILTER_IE_HAS_APPEARED,
0463     };
0464
0465     if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
0466         return;
0467     else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
0468         bssid_filtering = false;
0469
0470     if (priv->disable_beacon_filter) {
0471         bf_ctrl.enabled = 0;
0472         bf_ctrl.bcn_count = 1;
0473         bf_tbl.num = __cpu_to_le32(0);
0474     } else if (is_p2p || !is_sta) {
0475         bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
0476             WSM_BEACON_FILTER_AUTO_ERP;
0477         bf_ctrl.bcn_count = 0;
0478         bf_tbl.num = __cpu_to_le32(2);
0479     } else {
0480         bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
0481         bf_ctrl.bcn_count = 0;
0482         bf_tbl.num = __cpu_to_le32(3);
0483     }
0484
0485     /* When acting as p2p client being connected to p2p GO, in order to
0486      * receive frames from a different p2p device, turn off bssid filter.
0487      *
0488      * WARNING: FW dependency!
0489      * This can only be used with FW WSM371 and its successors.
0490      * In that FW version even with bssid filter turned off,
0491      * device will block most of the unwanted frames.
0492      */
0493     if (is_p2p)
0494         bssid_filtering = false;
0495
0496     ret = wsm_set_rx_filter(priv, &priv->rx_filter);
0497     if (!ret)
0498         ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
0499     if (!ret)
0500         ret = wsm_beacon_filter_control(priv, &bf_ctrl);
0501     if (!ret)
0502         ret = wsm_set_bssid_filtering(priv, bssid_filtering);
0503     if (!ret)
0504         ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
0505     if (ret)
0506         wiphy_err(priv->hw->wiphy,
0507               "Update filtering failed: %d.\n", ret);
0508     return;
0509 }
0510
0511 void cw1200_update_filtering_work(struct work_struct *work)
0512 {
0513     struct cw1200_common *priv =
0514         container_of(work, struct cw1200_common,
0515                  update_filtering_work);
0516
0517     cw1200_update_filtering(priv);
0518 }
0519
0520 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
0521 {
0522     struct cw1200_common *priv =
0523         container_of(work, struct cw1200_common,
0524                  set_beacon_wakeup_period_work);
0525
0526     wsm_set_beacon_wakeup_period(priv,
0527                      priv->beacon_int * priv->join_dtim_period >
0528                      MAX_BEACON_SKIP_TIME_MS ? 1 :
0529                      priv->join_dtim_period, 0);
0530 }
0531
0532 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
0533                  struct netdev_hw_addr_list *mc_list)
0534 {
0535     static u8 broadcast_ipv6[ETH_ALEN] = {
0536         0x33, 0x33, 0x00, 0x00, 0x00, 0x01
0537     };
0538     static u8 broadcast_ipv4[ETH_ALEN] = {
0539         0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
0540     };
0541     struct cw1200_common *priv = hw->priv;
0542     struct netdev_hw_addr *ha;
0543     int count = 0;
0544
0545     /* Disable multicast filtering */
0546     priv->has_multicast_subscription = false;
0547     memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
0548
0549     if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
0550         return 0;
0551
0552     /* Enable if requested */
0553     netdev_hw_addr_list_for_each(ha, mc_list) {
0554         pr_debug("[STA] multicast: %pM\n", ha->addr);
0555         memcpy(&priv->multicast_filter.macaddrs[count],
0556                ha->addr, ETH_ALEN);
0557         if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
0558             !ether_addr_equal(ha->addr, broadcast_ipv6))
0559             priv->has_multicast_subscription = true;
0560         count++;
0561     }
0562
0563     if (count) {
0564         priv->multicast_filter.enable = __cpu_to_le32(1);
0565         priv->multicast_filter.num_addrs = __cpu_to_le32(count);
0566     }
0567
0568     return netdev_hw_addr_list_count(mc_list);
0569 }
0570
0571 void cw1200_configure_filter(struct ieee80211_hw *dev,
0572                  unsigned int changed_flags,
0573                  unsigned int *total_flags,
0574                  u64 multicast)
0575 {
0576     struct cw1200_common *priv = dev->priv;
0577     bool listening = !!(*total_flags &
0578                 (FIF_OTHER_BSS |
0579                  FIF_BCN_PRBRESP_PROMISC |
0580                  FIF_PROBE_REQ));
0581
0582     *total_flags &= FIF_OTHER_BSS |
0583             FIF_FCSFAIL |
0584             FIF_BCN_PRBRESP_PROMISC |
0585             FIF_PROBE_REQ;
0586
0587     down(&priv->scan.lock);
0588     mutex_lock(&priv->conf_mutex);
0589
0590     priv->rx_filter.promiscuous = 0;
0591     priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
0592             FIF_PROBE_REQ)) ? 1 : 0;
0593     priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
0594     priv->disable_beacon_filter = !(*total_flags &
0595                     (FIF_BCN_PRBRESP_PROMISC |
0596                      FIF_PROBE_REQ));
0597     if (priv->listening != listening) {
0598         priv->listening = listening;
0599         wsm_lock_tx(priv);
0600         cw1200_update_listening(priv, listening);
0601         wsm_unlock_tx(priv);
0602     }
0603     cw1200_update_filtering(priv);
0604     mutex_unlock(&priv->conf_mutex);
0605     up(&priv->scan.lock);
0606 }
0607
0608 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
0609            unsigned int link_id, u16 queue,
0610            const struct ieee80211_tx_queue_params *params)
0611 {
0612     struct cw1200_common *priv = dev->priv;
0613     int ret = 0;
0614     /* To prevent re-applying PM request OID again and again*/
0615     bool old_uapsd_flags;
0616
0617     mutex_lock(&priv->conf_mutex);
0618
0619     if (queue < dev->queues) {
0620         old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
0621
0622         WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
0623         ret = wsm_set_tx_queue_params(priv,
0624                           &priv->tx_queue_params.params[queue], queue);
0625         if (ret) {
0626             ret = -EINVAL;
0627             goto out;
0628         }
0629
0630         WSM_EDCA_SET(&priv->edca, queue, params->aifs,
0631                  params->cw_min, params->cw_max,
0632                  params->txop, 0xc8,
0633                  params->uapsd);
0634         ret = wsm_set_edca_params(priv, &priv->edca);
0635         if (ret) {
0636             ret = -EINVAL;
0637             goto out;
0638         }
0639
0640         if (priv->mode == NL80211_IFTYPE_STATION) {
0641             ret = cw1200_set_uapsd_param(priv, &priv->edca);
0642             if (!ret && priv->setbssparams_done &&
0643                 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
0644                 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
0645                 ret = cw1200_set_pm(priv, &priv->powersave_mode);
0646         }
0647     } else {
0648         ret = -EINVAL;
0649     }
0650
0651 out:
0652     mutex_unlock(&priv->conf_mutex);
0653     return ret;
0654 }
0655
0656 int cw1200_get_stats(struct ieee80211_hw *dev,
0657              struct ieee80211_low_level_stats *stats)
0658 {
0659     struct cw1200_common *priv = dev->priv;
0660
0661     memcpy(stats, &priv->stats, sizeof(*stats));
0662     return 0;
0663 }
0664
0665 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
0666 {
0667     struct wsm_set_pm pm = *arg;
0668
0669     if (priv->uapsd_info.uapsd_flags != 0)
0670         pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
0671
0672     if (memcmp(&pm, &priv->firmware_ps_mode,
0673            sizeof(struct wsm_set_pm))) {
0674         priv->firmware_ps_mode = pm;
0675         return wsm_set_pm(priv, &pm);
0676     } else {
0677         return 0;
0678     }
0679 }
0680
0681 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
0682            struct ieee80211_vif *vif, struct ieee80211_sta *sta,
0683            struct ieee80211_key_conf *key)
0684 {
0685     int ret = -EOPNOTSUPP;
0686     struct cw1200_common *priv = dev->priv;
0687     struct ieee80211_key_seq seq;
0688
0689     mutex_lock(&priv->conf_mutex);
0690
0691     if (cmd == SET_KEY) {
0692         u8 *peer_addr = NULL;
0693         int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
0694             1 : 0;
0695         int idx = cw1200_alloc_key(priv);
0696         struct wsm_add_key *wsm_key = &priv->keys[idx];
0697
0698         if (idx < 0) {
0699             ret = -EINVAL;
0700             goto finally;
0701         }
0702
0703         if (sta)
0704             peer_addr = sta->addr;
0705
0706         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
0707                   IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
0708
0709         switch (key->cipher) {
0710         case WLAN_CIPHER_SUITE_WEP40:
0711         case WLAN_CIPHER_SUITE_WEP104:
0712             if (key->keylen > 16) {
0713                 cw1200_free_key(priv, idx);
0714                 ret = -EINVAL;
0715                 goto finally;
0716             }
0717
0718             if (pairwise) {
0719                 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
0720                 memcpy(wsm_key->wep_pairwise.peer,
0721                        peer_addr, ETH_ALEN);
0722                 memcpy(wsm_key->wep_pairwise.keydata,
0723                        &key->key[0], key->keylen);
0724                 wsm_key->wep_pairwise.keylen = key->keylen;
0725             } else {
0726                 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
0727                 memcpy(wsm_key->wep_group.keydata,
0728                        &key->key[0], key->keylen);
0729                 wsm_key->wep_group.keylen = key->keylen;
0730                 wsm_key->wep_group.keyid = key->keyidx;
0731             }
0732             break;
0733         case WLAN_CIPHER_SUITE_TKIP:
0734             ieee80211_get_key_rx_seq(key, 0, &seq);
0735             if (pairwise) {
0736                 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
0737                 memcpy(wsm_key->tkip_pairwise.peer,
0738                        peer_addr, ETH_ALEN);
0739                 memcpy(wsm_key->tkip_pairwise.keydata,
0740                        &key->key[0], 16);
0741                 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
0742                        &key->key[16], 8);
0743                 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
0744                        &key->key[24], 8);
0745             } else {
0746                 size_t mic_offset =
0747                     (priv->mode == NL80211_IFTYPE_AP) ?
0748                     16 : 24;
0749                 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
0750                 memcpy(wsm_key->tkip_group.keydata,
0751                        &key->key[0], 16);
0752                 memcpy(wsm_key->tkip_group.rx_mic_key,
0753                        &key->key[mic_offset], 8);
0754
0755                 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
0756                 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
0757                 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
0758                 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
0759                 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
0760                 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
0761                 wsm_key->tkip_group.rx_seqnum[6] = 0;
0762                 wsm_key->tkip_group.rx_seqnum[7] = 0;
0763
0764                 wsm_key->tkip_group.keyid = key->keyidx;
0765             }
0766             break;
0767         case WLAN_CIPHER_SUITE_CCMP:
0768             ieee80211_get_key_rx_seq(key, 0, &seq);
0769             if (pairwise) {
0770                 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
0771                 memcpy(wsm_key->aes_pairwise.peer,
0772                        peer_addr, ETH_ALEN);
0773                 memcpy(wsm_key->aes_pairwise.keydata,
0774                        &key->key[0], 16);
0775             } else {
0776                 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
0777                 memcpy(wsm_key->aes_group.keydata,
0778                        &key->key[0], 16);
0779
0780                 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
0781                 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
0782                 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
0783                 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
0784                 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
0785                 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
0786                 wsm_key->aes_group.rx_seqnum[6] = 0;
0787                 wsm_key->aes_group.rx_seqnum[7] = 0;
0788                 wsm_key->aes_group.keyid = key->keyidx;
0789             }
0790             break;
0791         case WLAN_CIPHER_SUITE_SMS4:
0792             if (pairwise) {
0793                 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
0794                 memcpy(wsm_key->wapi_pairwise.peer,
0795                        peer_addr, ETH_ALEN);
0796                 memcpy(wsm_key->wapi_pairwise.keydata,
0797                        &key->key[0], 16);
0798                 memcpy(wsm_key->wapi_pairwise.mic_key,
0799                        &key->key[16], 16);
0800                 wsm_key->wapi_pairwise.keyid = key->keyidx;
0801             } else {
0802                 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
0803                 memcpy(wsm_key->wapi_group.keydata,
0804                        &key->key[0],  16);
0805                 memcpy(wsm_key->wapi_group.mic_key,
0806                        &key->key[16], 16);
0807                 wsm_key->wapi_group.keyid = key->keyidx;
0808             }
0809             break;
0810         default:
0811             pr_warn("Unhandled key type %d\n", key->cipher);
0812             cw1200_free_key(priv, idx);
0813             ret = -EOPNOTSUPP;
0814             goto finally;
0815         }
0816         ret = wsm_add_key(priv, wsm_key);
0817         if (!ret)
0818             key->hw_key_idx = idx;
0819         else
0820             cw1200_free_key(priv, idx);
0821     } else if (cmd == DISABLE_KEY) {
0822         struct wsm_remove_key wsm_key = {
0823             .index = key->hw_key_idx,
0824         };
0825
0826         if (wsm_key.index > WSM_KEY_MAX_INDEX) {
0827             ret = -EINVAL;
0828             goto finally;
0829         }
0830
0831         cw1200_free_key(priv, wsm_key.index);
0832         ret = wsm_remove_key(priv, &wsm_key);
0833     } else {
0834         pr_warn("Unhandled key command %d\n", cmd);
0835     }
0836
0837 finally:
0838     mutex_unlock(&priv->conf_mutex);
0839     return ret;
0840 }
0841
0842 void cw1200_wep_key_work(struct work_struct *work)
0843 {
0844     struct cw1200_common *priv =
0845         container_of(work, struct cw1200_common, wep_key_work);
0846     u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
0847     struct cw1200_queue *queue = &priv->tx_queue[queue_id];
0848     __le32 wep_default_key_id = __cpu_to_le32(
0849         priv->wep_default_key_id);
0850
0851     pr_debug("[STA] Setting default WEP key: %d\n",
0852          priv->wep_default_key_id);
0853     wsm_flush_tx(priv);
0854     wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
0855               &wep_default_key_id, sizeof(wep_default_key_id));
0856     cw1200_queue_requeue(queue, priv->pending_frame_id);
0857     wsm_unlock_tx(priv);
0858 }
0859
0860 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
0861 {
0862     int ret = 0;
0863     __le32 val32;
0864     struct cw1200_common *priv = hw->priv;
0865
0866     if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
0867         return 0;
0868
0869     if (value != (u32) -1)
0870         val32 = __cpu_to_le32(value);
0871     else
0872         val32 = 0; /* disabled */
0873
0874     if (priv->rts_threshold == value)
0875         goto out;
0876
0877     pr_debug("[STA] Setting RTS threshold: %d\n",
0878          priv->rts_threshold);
0879
0880     /* mutex_lock(&priv->conf_mutex); */
0881     ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
0882                 &val32, sizeof(val32));
0883     if (!ret)
0884         priv->rts_threshold = value;
0885     /* mutex_unlock(&priv->conf_mutex); */
0886
0887 out:
0888     return ret;
0889 }
0890
0891 /* If successful, LOCKS the TX queue! */
0892 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
0893 {
0894     int i, ret;
0895
0896     for (;;) {
0897         /* TODO: correct flush handling is required when dev_stop.
0898          * Temporary workaround: 2s
0899          */
0900         if (drop) {
0901             for (i = 0; i < 4; ++i)
0902                 cw1200_queue_clear(&priv->tx_queue[i]);
0903         } else {
0904             ret = wait_event_timeout(
0905                 priv->tx_queue_stats.wait_link_id_empty,
0906                 cw1200_queue_stats_is_empty(
0907                     &priv->tx_queue_stats, -1),
0908                 2 * HZ);
0909         }
0910
0911         if (!drop && ret <= 0) {
0912             ret = -ETIMEDOUT;
0913             break;
0914         } else {
0915             ret = 0;
0916         }
0917
0918         wsm_lock_tx(priv);
0919         if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
0920             /* Highly unlikely: WSM requeued frames. */
0921             wsm_unlock_tx(priv);
0922             continue;
0923         }
0924         break;
0925     }
0926     return ret;
0927 }
0928
0929 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
0930           u32 queues, bool drop)
0931 {
0932     struct cw1200_common *priv = hw->priv;
0933
0934     switch (priv->mode) {
0935     case NL80211_IFTYPE_MONITOR:
0936         drop = true;
0937         break;
0938     case NL80211_IFTYPE_AP:
0939         if (!priv->enable_beacon)
0940             drop = true;
0941         break;
0942     }
0943
0944     if (!__cw1200_flush(priv, drop))
0945         wsm_unlock_tx(priv);
0946
0947     return;
0948 }
0949
0950 /* ******************************************************************** */
0951 /* WSM callbacks                            */
0952
0953 void cw1200_free_event_queue(struct cw1200_common *priv)
0954 {
0955     LIST_HEAD(list);
0956
0957     spin_lock(&priv->event_queue_lock);
0958     list_splice_init(&priv->event_queue, &list);
0959     spin_unlock(&priv->event_queue_lock);
0960
0961     __cw1200_free_event_queue(&list);
0962 }
0963
0964 void cw1200_event_handler(struct work_struct *work)
0965 {
0966     struct cw1200_common *priv =
0967         container_of(work, struct cw1200_common, event_handler);
0968     struct cw1200_wsm_event *event;
0969     LIST_HEAD(list);
0970
0971     spin_lock(&priv->event_queue_lock);
0972     list_splice_init(&priv->event_queue, &list);
0973     spin_unlock(&priv->event_queue_lock);
0974
0975     list_for_each_entry(event, &list, link) {
0976         switch (event->evt.id) {
0977         case WSM_EVENT_ERROR:
0978             pr_err("Unhandled WSM Error from LMAC\n");
0979             break;
0980         case WSM_EVENT_BSS_LOST:
0981             pr_debug("[CQM] BSS lost.\n");
0982             cancel_work_sync(&priv->unjoin_work);
0983             if (!down_trylock(&priv->scan.lock)) {
0984                 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
0985                 up(&priv->scan.lock);
0986             } else {
0987                 /* Scan is in progress. Delay reporting.
0988                  * Scan complete will trigger bss_loss_work
0989                  */
0990                 priv->delayed_link_loss = 1;
0991                 /* Also start a watchdog. */
0992                 queue_delayed_work(priv->workqueue,
0993                            &priv->bss_loss_work, 5*HZ);
0994             }
0995             break;
0996         case WSM_EVENT_BSS_REGAINED:
0997             pr_debug("[CQM] BSS regained.\n");
0998             cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
0999             cancel_work_sync(&priv->unjoin_work);
1000             break;
1001         case WSM_EVENT_RADAR_DETECTED:
1002             wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1003             break;
1004         case WSM_EVENT_RCPI_RSSI:
1005         {
1006             /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1007              * RSSI = RCPI / 2 - 110
1008              */
1009             int rcpi_rssi = (int)(event->evt.data & 0xFF);
1010             int cqm_evt;
1011             if (priv->cqm_use_rssi)
1012                 rcpi_rssi = (s8)rcpi_rssi;
1013             else
1014                 rcpi_rssi =  rcpi_rssi / 2 - 110;
1015
1016             cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1017                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1018                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1019             pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1020             ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi,
1021                           GFP_KERNEL);
1022             break;
1023         }
1024         case WSM_EVENT_BT_INACTIVE:
1025             pr_warn("Unhandled BT INACTIVE from LMAC\n");
1026             break;
1027         case WSM_EVENT_BT_ACTIVE:
1028             pr_warn("Unhandled BT ACTIVE from LMAC\n");
1029             break;
1030         }
1031     }
1032     __cw1200_free_event_queue(&list);
1033 }
1034
1035 void cw1200_bss_loss_work(struct work_struct *work)
1036 {
1037     struct cw1200_common *priv =
1038         container_of(work, struct cw1200_common, bss_loss_work.work);
1039
1040     pr_debug("[CQM] Reporting connection loss.\n");
1041     wsm_lock_tx(priv);
1042     if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1043         wsm_unlock_tx(priv);
1044 }
1045
1046 void cw1200_bss_params_work(struct work_struct *work)
1047 {
1048     struct cw1200_common *priv =
1049         container_of(work, struct cw1200_common, bss_params_work);
1050     mutex_lock(&priv->conf_mutex);
1051
1052     priv->bss_params.reset_beacon_loss = 1;
1053     wsm_set_bss_params(priv, &priv->bss_params);
1054     priv->bss_params.reset_beacon_loss = 0;
1055
1056     mutex_unlock(&priv->conf_mutex);
1057 }
1058
1059 /* ******************************************************************** */
1060 /* Internal API                             */
1061
1062 /* This function is called to Parse the SDD file
1063  * to extract listen_interval and PTA related information
1064  * sdd is a TLV: u8 id, u8 len, u8 data[]
1065  */
1066 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1067 {
1068     const u8 *p = priv->sdd->data;
1069     int ret = 0;
1070
1071     while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1072         if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1073             pr_warn("Malformed sdd structure\n");
1074             return -1;
1075         }
1076         switch (p[0]) {
1077         case SDD_PTA_CFG_ELT_ID: {
1078             u16 v;
1079             if (p[1] < 4) {
1080                 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1081                 ret = -1;
1082                 break;
1083             }
1084             v = le16_to_cpu(*((__le16 *)(p + 2)));
1085             if (!v)  /* non-zero means this is enabled */
1086                 break;
1087
1088             v = le16_to_cpu(*((__le16 *)(p + 4)));
1089             priv->conf_listen_interval = (v >> 7) & 0x1F;
1090             pr_debug("PTA found; Listen Interval %d\n",
1091                  priv->conf_listen_interval);
1092             break;
1093         }
1094         case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1095             u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1096             if (clk != priv->hw_refclk)
1097                 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1098                     clk, priv->hw_refclk);
1099             break;
1100         }
1101         default:
1102             break;
1103         }
1104         p += p[1] + 2;
1105     }
1106
1107     if (!priv->bt_present) {
1108         pr_debug("PTA element NOT found.\n");
1109         priv->conf_listen_interval = 0;
1110     }
1111     return ret;
1112 }
1113
1114 int cw1200_setup_mac(struct cw1200_common *priv)
1115 {
1116     int ret = 0;
1117
1118     /* NOTE: There is a bug in FW: it reports signal
1119      * as RSSI if RSSI subscription is enabled.
1120      * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1121      *
1122      * NOTE2: RSSI based reports have been switched to RCPI, since
1123      * FW has a bug and RSSI reported values are not stable,
1124      * what can lead to signal level oscilations in user-end applications
1125      */
1126     struct wsm_rcpi_rssi_threshold threshold = {
1127         .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1128         WSM_RCPI_RSSI_DONT_USE_UPPER |
1129         WSM_RCPI_RSSI_DONT_USE_LOWER,
1130         .rollingAverageCount = 16,
1131     };
1132
1133     struct wsm_configuration cfg = {
1134         .dot11StationId = &priv->mac_addr[0],
1135     };
1136
1137     /* Remember the decission here to make sure, we will handle
1138      * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1139      */
1140     if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1141         priv->cqm_use_rssi = true;
1142
1143     if (!priv->sdd) {
1144         ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1145         if (ret) {
1146             pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1147             return ret;
1148         }
1149         cw1200_parse_sdd_file(priv);
1150     }
1151
1152     cfg.dpdData = priv->sdd->data;
1153     cfg.dpdData_size = priv->sdd->size;
1154     ret = wsm_configuration(priv, &cfg);
1155     if (ret)
1156         return ret;
1157
1158     /* Configure RSSI/SCPI reporting as RSSI. */
1159     wsm_set_rcpi_rssi_threshold(priv, &threshold);
1160
1161     return 0;
1162 }
1163
1164 static void cw1200_join_complete(struct cw1200_common *priv)
1165 {
1166     pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1167
1168     priv->join_pending = false;
1169     if (priv->join_complete_status) {
1170         priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1171         cw1200_update_listening(priv, priv->listening);
1172         cw1200_do_unjoin(priv);
1173         ieee80211_connection_loss(priv->vif);
1174     } else {
1175         if (priv->mode == NL80211_IFTYPE_ADHOC)
1176             priv->join_status = CW1200_JOIN_STATUS_IBSS;
1177         else
1178             priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1179     }
1180     wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1181 }
1182
1183 void cw1200_join_complete_work(struct work_struct *work)
1184 {
1185     struct cw1200_common *priv =
1186         container_of(work, struct cw1200_common, join_complete_work);
1187     mutex_lock(&priv->conf_mutex);
1188     cw1200_join_complete(priv);
1189     mutex_unlock(&priv->conf_mutex);
1190 }
1191
1192 void cw1200_join_complete_cb(struct cw1200_common *priv,
1193                  struct wsm_join_complete *arg)
1194 {
1195     pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1196          arg->status);
1197
1198     if (cancel_delayed_work(&priv->join_timeout)) {
1199         priv->join_complete_status = arg->status;
1200         queue_work(priv->workqueue, &priv->join_complete_work);
1201     }
1202 }
1203
1204 /* MUST be called with tx_lock held!  It will be unlocked for us. */
1205 static void cw1200_do_join(struct cw1200_common *priv)
1206 {
1207     const u8 *bssid;
1208     struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1209     struct cfg80211_bss *bss = NULL;
1210     struct wsm_protected_mgmt_policy mgmt_policy;
1211     struct wsm_join join = {
1212         .mode = priv->vif->cfg.ibss_joined ?
1213         WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1214         .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1215         .probe_for_join = 1,
1216         .atim_window = 0,
1217         .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1218                               conf->basic_rates),
1219     };
1220     if (delayed_work_pending(&priv->join_timeout)) {
1221         pr_warn("[STA] - Join request already pending, skipping..\n");
1222         wsm_unlock_tx(priv);
1223         return;
1224     }
1225
1226     if (priv->join_status)
1227         cw1200_do_unjoin(priv);
1228
1229     bssid = priv->vif->bss_conf.bssid;
1230
1231     bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0,
1232                    IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
1233
1234     if (!bss && !priv->vif->cfg.ibss_joined) {
1235         wsm_unlock_tx(priv);
1236         return;
1237     }
1238
1239     mutex_lock(&priv->conf_mutex);
1240
1241     /* Under the conf lock: check scan status and
1242      * bail out if it is in progress.
1243      */
1244     if (atomic_read(&priv->scan.in_progress)) {
1245         wsm_unlock_tx(priv);
1246         goto done_put;
1247     }
1248
1249     priv->join_pending = true;
1250
1251     /* Sanity check basic rates */
1252     if (!join.basic_rate_set)
1253         join.basic_rate_set = 7;
1254
1255     /* Sanity check beacon interval */
1256     if (!priv->beacon_int)
1257         priv->beacon_int = 1;
1258
1259     join.beacon_interval = priv->beacon_int;
1260
1261     /* BT Coex related changes */
1262     if (priv->bt_present) {
1263         if (((priv->conf_listen_interval * 100) %
1264              priv->beacon_int) == 0)
1265             priv->listen_interval =
1266                 ((priv->conf_listen_interval * 100) /
1267                  priv->beacon_int);
1268         else
1269             priv->listen_interval =
1270                 ((priv->conf_listen_interval * 100) /
1271                  priv->beacon_int + 1);
1272     }
1273
1274     if (priv->hw->conf.ps_dtim_period)
1275         priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1276     join.dtim_period = priv->join_dtim_period;
1277
1278     join.channel_number = priv->channel->hw_value;
1279     join.band = (priv->channel->band == NL80211_BAND_5GHZ) ?
1280         WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1281
1282     memcpy(join.bssid, bssid, sizeof(join.bssid));
1283
1284     pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1285          join.bssid,
1286          join.dtim_period, priv->beacon_int);
1287
1288     if (!priv->vif->cfg.ibss_joined) {
1289         const u8 *ssidie;
1290         rcu_read_lock();
1291         ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1292         if (ssidie) {
1293             join.ssid_len = ssidie[1];
1294             memcpy(join.ssid, &ssidie[2], join.ssid_len);
1295         }
1296         rcu_read_unlock();
1297     }
1298
1299     if (priv->vif->p2p) {
1300         join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1301         join.basic_rate_set =
1302             cw1200_rate_mask_to_wsm(priv, 0xFF0);
1303     }
1304
1305     /* Enable asynchronous join calls */
1306     if (!priv->vif->cfg.ibss_joined) {
1307         join.flags |= WSM_JOIN_FLAGS_FORCE;
1308         join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1309     }
1310
1311     wsm_flush_tx(priv);
1312
1313     /* Stay Awake for Join and Auth Timeouts and a bit more */
1314     cw1200_pm_stay_awake(&priv->pm_state,
1315                  CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1316
1317     cw1200_update_listening(priv, false);
1318
1319     /* Turn on Block ACKs */
1320     wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1321                  priv->ba_rx_tid_mask);
1322
1323     /* Set up timeout */
1324     if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1325         priv->join_status = CW1200_JOIN_STATUS_JOINING;
1326         queue_delayed_work(priv->workqueue,
1327                    &priv->join_timeout,
1328                    CW1200_JOIN_TIMEOUT);
1329     }
1330
1331     /* 802.11w protected mgmt frames */
1332     mgmt_policy.protectedMgmtEnable = 0;
1333     mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1334     mgmt_policy.encryptionForAuthFrame = 1;
1335     wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1336
1337     /* Perform actual join */
1338     if (wsm_join(priv, &join)) {
1339         pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1340         cancel_delayed_work_sync(&priv->join_timeout);
1341         cw1200_update_listening(priv, priv->listening);
1342         /* Tx lock still held, unjoin will clear it. */
1343         if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1344             wsm_unlock_tx(priv);
1345     } else {
1346         if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1347             cw1200_join_complete(priv); /* Will clear tx_lock */
1348
1349         /* Upload keys */
1350         cw1200_upload_keys(priv);
1351
1352         /* Due to beacon filtering it is possible that the
1353          * AP's beacon is not known for the mac80211 stack.
1354          * Disable filtering temporary to make sure the stack
1355          * receives at least one
1356          */
1357         priv->disable_beacon_filter = true;
1358     }
1359     cw1200_update_filtering(priv);
1360
1361 done_put:
1362     mutex_unlock(&priv->conf_mutex);
1363     if (bss)
1364         cfg80211_put_bss(priv->hw->wiphy, bss);
1365 }
1366
1367 void cw1200_join_timeout(struct work_struct *work)
1368 {
1369     struct cw1200_common *priv =
1370         container_of(work, struct cw1200_common, join_timeout.work);
1371     pr_debug("[WSM] Join timed out.\n");
1372     wsm_lock_tx(priv);
1373     if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1374         wsm_unlock_tx(priv);
1375 }
1376
1377 static void cw1200_do_unjoin(struct cw1200_common *priv)
1378 {
1379     struct wsm_reset reset = {
1380         .reset_statistics = true,
1381     };
1382
1383     cancel_delayed_work_sync(&priv->join_timeout);
1384
1385     mutex_lock(&priv->conf_mutex);
1386     priv->join_pending = false;
1387
1388     if (atomic_read(&priv->scan.in_progress)) {
1389         if (priv->delayed_unjoin)
1390             wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1391         else
1392             priv->delayed_unjoin = true;
1393         goto done;
1394     }
1395
1396     priv->delayed_link_loss = false;
1397
1398     if (!priv->join_status)
1399         goto done;
1400
1401     if (priv->join_status == CW1200_JOIN_STATUS_AP)
1402         goto done;
1403
1404     cancel_work_sync(&priv->update_filtering_work);
1405     cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1406     priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1407
1408     /* Unjoin is a reset. */
1409     wsm_flush_tx(priv);
1410     wsm_keep_alive_period(priv, 0);
1411     wsm_reset(priv, &reset);
1412     wsm_set_output_power(priv, priv->output_power * 10);
1413     priv->join_dtim_period = 0;
1414     cw1200_setup_mac(priv);
1415     cw1200_free_event_queue(priv);
1416     cancel_work_sync(&priv->event_handler);
1417     cw1200_update_listening(priv, priv->listening);
1418     cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1419
1420     /* Disable Block ACKs */
1421     wsm_set_block_ack_policy(priv, 0, 0);
1422
1423     priv->disable_beacon_filter = false;
1424     cw1200_update_filtering(priv);
1425     memset(&priv->association_mode, 0,
1426            sizeof(priv->association_mode));
1427     memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1428     priv->setbssparams_done = false;
1429     memset(&priv->firmware_ps_mode, 0,
1430            sizeof(priv->firmware_ps_mode));
1431
1432     pr_debug("[STA] Unjoin completed.\n");
1433
1434 done:
1435     mutex_unlock(&priv->conf_mutex);
1436 }
1437
1438 void cw1200_unjoin_work(struct work_struct *work)
1439 {
1440     struct cw1200_common *priv =
1441         container_of(work, struct cw1200_common, unjoin_work);
1442
1443     cw1200_do_unjoin(priv);
1444
1445     /* Tell the stack we're dead */
1446     ieee80211_connection_loss(priv->vif);
1447
1448     wsm_unlock_tx(priv);
1449 }
1450
1451 int cw1200_enable_listening(struct cw1200_common *priv)
1452 {
1453     struct wsm_start start = {
1454         .mode = WSM_START_MODE_P2P_DEV,
1455         .band = WSM_PHY_BAND_2_4G,
1456         .beacon_interval = 100,
1457         .dtim_period = 1,
1458         .probe_delay = 0,
1459         .basic_rate_set = 0x0F,
1460     };
1461
1462     if (priv->channel) {
1463         start.band = priv->channel->band == NL80211_BAND_5GHZ ?
1464                  WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1465         start.channel_number = priv->channel->hw_value;
1466     } else {
1467         start.band = WSM_PHY_BAND_2_4G;
1468         start.channel_number = 1;
1469     }
1470
1471     return wsm_start(priv, &start);
1472 }
1473
1474 int cw1200_disable_listening(struct cw1200_common *priv)
1475 {
1476     int ret;
1477     struct wsm_reset reset = {
1478         .reset_statistics = true,
1479     };
1480     ret = wsm_reset(priv, &reset);
1481     return ret;
1482 }
1483
1484 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1485 {
1486     if (enabled) {
1487         if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1488             if (!cw1200_enable_listening(priv))
1489                 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1490             wsm_set_probe_responder(priv, true);
1491         }
1492     } else {
1493         if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1494             if (!cw1200_disable_listening(priv))
1495                 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1496             wsm_set_probe_responder(priv, false);
1497         }
1498     }
1499 }
1500
1501 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1502                const struct wsm_edca_params *arg)
1503 {
1504     int ret;
1505     u16 uapsd_flags = 0;
1506
1507     /* Here's the mapping AC [queue, bit]
1508      *  VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1509      */
1510
1511     if (arg->uapsd_enable[0])
1512         uapsd_flags |= 1 << 3;
1513
1514     if (arg->uapsd_enable[1])
1515         uapsd_flags |= 1 << 2;
1516
1517     if (arg->uapsd_enable[2])
1518         uapsd_flags |= 1 << 1;
1519
1520     if (arg->uapsd_enable[3])
1521         uapsd_flags |= 1;
1522
1523     /* Currently pseudo U-APSD operation is not supported, so setting
1524      * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1525      * AutoTriggerStep to 0
1526      */
1527
1528     priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1529     priv->uapsd_info.min_auto_trigger_interval = 0;
1530     priv->uapsd_info.max_auto_trigger_interval = 0;
1531     priv->uapsd_info.auto_trigger_step = 0;
1532
1533     ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1534     return ret;
1535 }
1536
1537 /* ******************************************************************** */
1538 /* AP API                               */
1539
1540 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1541            struct ieee80211_sta *sta)
1542 {
1543     struct cw1200_common *priv = hw->priv;
1544     struct cw1200_sta_priv *sta_priv =
1545             (struct cw1200_sta_priv *)&sta->drv_priv;
1546     struct cw1200_link_entry *entry;
1547     struct sk_buff *skb;
1548
1549     if (priv->mode != NL80211_IFTYPE_AP)
1550         return 0;
1551
1552     sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1553     if (WARN_ON(!sta_priv->link_id)) {
1554         wiphy_info(priv->hw->wiphy,
1555                "[AP] No more link IDs available.\n");
1556         return -ENOENT;
1557     }
1558
1559     entry = &priv->link_id_db[sta_priv->link_id - 1];
1560     spin_lock_bh(&priv->ps_state_lock);
1561     if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1562                     IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1563         priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1564     entry->status = CW1200_LINK_HARD;
1565     while ((skb = skb_dequeue(&entry->rx_queue)))
1566         ieee80211_rx_irqsafe(priv->hw, skb);
1567     spin_unlock_bh(&priv->ps_state_lock);
1568     return 0;
1569 }
1570
1571 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1572               struct ieee80211_sta *sta)
1573 {
1574     struct cw1200_common *priv = hw->priv;
1575     struct cw1200_sta_priv *sta_priv =
1576             (struct cw1200_sta_priv *)&sta->drv_priv;
1577     struct cw1200_link_entry *entry;
1578
1579     if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1580         return 0;
1581
1582     entry = &priv->link_id_db[sta_priv->link_id - 1];
1583     spin_lock_bh(&priv->ps_state_lock);
1584     entry->status = CW1200_LINK_RESERVE;
1585     entry->timestamp = jiffies;
1586     wsm_lock_tx_async(priv);
1587     if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1588         wsm_unlock_tx(priv);
1589     spin_unlock_bh(&priv->ps_state_lock);
1590     flush_workqueue(priv->workqueue);
1591     return 0;
1592 }
1593
1594 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1595                 struct ieee80211_vif *vif,
1596                 enum sta_notify_cmd notify_cmd,
1597                 int link_id)
1598 {
1599     struct cw1200_common *priv = dev->priv;
1600     u32 bit, prev;
1601
1602     /* Zero link id means "for all link IDs" */
1603     if (link_id)
1604         bit = BIT(link_id);
1605     else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1606         bit = 0;
1607     else
1608         bit = priv->link_id_map;
1609     prev = priv->sta_asleep_mask & bit;
1610
1611     switch (notify_cmd) {
1612     case STA_NOTIFY_SLEEP:
1613         if (!prev) {
1614             if (priv->buffered_multicasts &&
1615                 !priv->sta_asleep_mask)
1616                 queue_work(priv->workqueue,
1617                        &priv->multicast_start_work);
1618             priv->sta_asleep_mask |= bit;
1619         }
1620         break;
1621     case STA_NOTIFY_AWAKE:
1622         if (prev) {
1623             priv->sta_asleep_mask &= ~bit;
1624             priv->pspoll_mask &= ~bit;
1625             if (priv->tx_multicast && link_id &&
1626                 !priv->sta_asleep_mask)
1627                 queue_work(priv->workqueue,
1628                        &priv->multicast_stop_work);
1629             cw1200_bh_wakeup(priv);
1630         }
1631         break;
1632     }
1633 }
1634
1635 void cw1200_sta_notify(struct ieee80211_hw *dev,
1636                struct ieee80211_vif *vif,
1637                enum sta_notify_cmd notify_cmd,
1638                struct ieee80211_sta *sta)
1639 {
1640     struct cw1200_common *priv = dev->priv;
1641     struct cw1200_sta_priv *sta_priv =
1642         (struct cw1200_sta_priv *)&sta->drv_priv;
1643
1644     spin_lock_bh(&priv->ps_state_lock);
1645     __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1646     spin_unlock_bh(&priv->ps_state_lock);
1647 }
1648
1649 static void cw1200_ps_notify(struct cw1200_common *priv,
1650               int link_id, bool ps)
1651 {
1652     if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1653         return;
1654
1655     pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1656          ps ? "Stop" : "Start",
1657          link_id, priv->sta_asleep_mask);
1658
1659     __cw1200_sta_notify(priv->hw, priv->vif,
1660                 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1661 }
1662
1663 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1664 {
1665     struct sk_buff *skb;
1666     struct wsm_update_ie update_ie = {
1667         .what = WSM_UPDATE_IE_BEACON,
1668         .count = 1,
1669     };
1670     u16 tim_offset, tim_length;
1671
1672     pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1673
1674     skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1675                        &tim_offset, &tim_length, 0);
1676     if (!skb) {
1677         if (!__cw1200_flush(priv, true))
1678             wsm_unlock_tx(priv);
1679         return -ENOENT;
1680     }
1681
1682     if (tim_offset && tim_length >= 6) {
1683         /* Ignore DTIM count from mac80211:
1684          * firmware handles DTIM internally.
1685          */
1686         skb->data[tim_offset + 2] = 0;
1687
1688         /* Set/reset aid0 bit */
1689         if (aid0_bit_set)
1690             skb->data[tim_offset + 4] |= 1;
1691         else
1692             skb->data[tim_offset + 4] &= ~1;
1693     }
1694
1695     update_ie.ies = &skb->data[tim_offset];
1696     update_ie.length = tim_length;
1697     wsm_update_ie(priv, &update_ie);
1698
1699     dev_kfree_skb(skb);
1700
1701     return 0;
1702 }
1703
1704 void cw1200_set_tim_work(struct work_struct *work)
1705 {
1706     struct cw1200_common *priv =
1707         container_of(work, struct cw1200_common, set_tim_work);
1708     (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1709 }
1710
1711 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1712            bool set)
1713 {
1714     struct cw1200_common *priv = dev->priv;
1715     queue_work(priv->workqueue, &priv->set_tim_work);
1716     return 0;
1717 }
1718
1719 void cw1200_set_cts_work(struct work_struct *work)
1720 {
1721     struct cw1200_common *priv =
1722         container_of(work, struct cw1200_common, set_cts_work);
1723
1724     u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1725     struct wsm_update_ie update_ie = {
1726         .what = WSM_UPDATE_IE_BEACON,
1727         .count = 1,
1728         .ies = erp_ie,
1729         .length = 3,
1730     };
1731     u32 erp_info;
1732     __le32 use_cts_prot;
1733     mutex_lock(&priv->conf_mutex);
1734     erp_info = priv->erp_info;
1735     mutex_unlock(&priv->conf_mutex);
1736     use_cts_prot =
1737         erp_info & WLAN_ERP_USE_PROTECTION ?
1738         __cpu_to_le32(1) : 0;
1739
1740     erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1741
1742     pr_debug("[STA] ERP information 0x%x\n", erp_info);
1743
1744     wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1745               &use_cts_prot, sizeof(use_cts_prot));
1746     wsm_update_ie(priv, &update_ie);
1747
1748     return;
1749 }
1750
1751 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1752 {
1753     struct wsm_override_internal_txrate arg;
1754     int ret = 0;
1755
1756     if (priv->mode == NL80211_IFTYPE_STATION) {
1757         /* Plumb PSPOLL and NULL template */
1758         cw1200_upload_pspoll(priv);
1759         cw1200_upload_null(priv);
1760         cw1200_upload_qosnull(priv);
1761     } else {
1762         return 0;
1763     }
1764
1765     memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1766
1767     if (!priv->vif->p2p) {
1768         /* STATION mode */
1769         if (priv->bss_params.operational_rate_set & ~0xF) {
1770             pr_debug("[STA] STA has ERP rates\n");
1771             /* G or BG mode */
1772             arg.internalTxRate = (__ffs(
1773             priv->bss_params.operational_rate_set & ~0xF));
1774         } else {
1775             pr_debug("[STA] STA has non ERP rates\n");
1776             /* B only mode */
1777             arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1778         }
1779         arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1780     } else {
1781         /* P2P mode */
1782         arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1783         arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1784     }
1785
1786     pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1787          priv->mode,
1788          arg.internalTxRate,
1789          arg.nonErpInternalTxRate);
1790
1791     ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1792                 &arg, sizeof(arg));
1793
1794     return ret;
1795 }
1796
1797 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1798                  struct ieee80211_vif *vif,
1799                  struct ieee80211_bss_conf *info,
1800                  u64 changed)
1801 {
1802     struct cw1200_common *priv = dev->priv;
1803     bool do_join = false;
1804
1805     mutex_lock(&priv->conf_mutex);
1806
1807     pr_debug("BSS CHANGED:  %llx\n", changed);
1808
1809     /* TODO: BSS_CHANGED_QOS */
1810     /* TODO: BSS_CHANGED_TXPOWER */
1811
1812     if (changed & BSS_CHANGED_ARP_FILTER) {
1813         struct wsm_mib_arp_ipv4_filter filter = {0};
1814         int i;
1815
1816         pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1817              vif->cfg.arp_addr_cnt);
1818
1819         /* Currently only one IP address is supported by firmware.
1820          * In case of more IPs arp filtering will be disabled.
1821          */
1822         if (vif->cfg.arp_addr_cnt > 0 &&
1823             vif->cfg.arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1824             for (i = 0; i < vif->cfg.arp_addr_cnt; i++) {
1825                 filter.ipv4addrs[i] = vif->cfg.arp_addr_list[i];
1826                 pr_debug("[STA] addr[%d]: 0x%X\n",
1827                      i, filter.ipv4addrs[i]);
1828             }
1829             filter.enable = __cpu_to_le32(1);
1830         }
1831
1832         pr_debug("[STA] arp ip filter enable: %d\n",
1833              __le32_to_cpu(filter.enable));
1834
1835         wsm_set_arp_ipv4_filter(priv, &filter);
1836     }
1837
1838     if (changed &
1839         (BSS_CHANGED_BEACON |
1840          BSS_CHANGED_AP_PROBE_RESP |
1841          BSS_CHANGED_BSSID |
1842          BSS_CHANGED_SSID |
1843          BSS_CHANGED_IBSS)) {
1844         pr_debug("BSS_CHANGED_BEACON\n");
1845         priv->beacon_int = info->beacon_int;
1846         cw1200_update_beaconing(priv);
1847         cw1200_upload_beacon(priv);
1848     }
1849
1850     if (changed & BSS_CHANGED_BEACON_ENABLED) {
1851         pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1852
1853         if (priv->enable_beacon != info->enable_beacon) {
1854             cw1200_enable_beaconing(priv, info->enable_beacon);
1855             priv->enable_beacon = info->enable_beacon;
1856         }
1857     }
1858
1859     if (changed & BSS_CHANGED_BEACON_INT) {
1860         pr_debug("CHANGED_BEACON_INT\n");
1861         if (vif->cfg.ibss_joined)
1862             do_join = true;
1863         else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1864             cw1200_update_beaconing(priv);
1865     }
1866
1867     /* assoc/disassoc, or maybe AID changed */
1868     if (changed & BSS_CHANGED_ASSOC) {
1869         wsm_lock_tx(priv);
1870         priv->wep_default_key_id = -1;
1871         wsm_unlock_tx(priv);
1872     }
1873
1874     if (changed & BSS_CHANGED_BSSID) {
1875         pr_debug("BSS_CHANGED_BSSID\n");
1876         do_join = true;
1877     }
1878
1879     if (changed &
1880         (BSS_CHANGED_ASSOC |
1881          BSS_CHANGED_BSSID |
1882          BSS_CHANGED_IBSS |
1883          BSS_CHANGED_BASIC_RATES |
1884          BSS_CHANGED_HT)) {
1885         pr_debug("BSS_CHANGED_ASSOC\n");
1886         if (vif->cfg.assoc) {
1887             if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1888                 ieee80211_connection_loss(vif);
1889                 mutex_unlock(&priv->conf_mutex);
1890                 return;
1891             } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1892                 priv->join_status = CW1200_JOIN_STATUS_STA;
1893             }
1894         } else {
1895             do_join = true;
1896         }
1897
1898         if (vif->cfg.assoc || vif->cfg.ibss_joined) {
1899             struct ieee80211_sta *sta = NULL;
1900             __le32 htprot = 0;
1901
1902             if (info->dtim_period)
1903                 priv->join_dtim_period = info->dtim_period;
1904             priv->beacon_int = info->beacon_int;
1905
1906             rcu_read_lock();
1907
1908             if (info->bssid && !vif->cfg.ibss_joined)
1909                 sta = ieee80211_find_sta(vif, info->bssid);
1910             if (sta) {
1911                 priv->ht_info.ht_cap = sta->deflink.ht_cap;
1912                 priv->bss_params.operational_rate_set =
1913                     cw1200_rate_mask_to_wsm(priv,
1914                         sta->deflink.supp_rates[priv->channel->band]);
1915                 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1916                 priv->ht_info.operation_mode = info->ht_operation_mode;
1917             } else {
1918                 memset(&priv->ht_info, 0,
1919                        sizeof(priv->ht_info));
1920                 priv->bss_params.operational_rate_set = -1;
1921             }
1922             rcu_read_unlock();
1923
1924             /* Non Greenfield stations present */
1925             if (priv->ht_info.operation_mode &
1926                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1927                 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1928
1929             /* Set HT protection method */
1930             htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1931
1932             /* TODO:
1933              * STBC_param.dual_cts
1934              *  STBC_param.LSIG_TXOP_FILL
1935              */
1936
1937             wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1938                       &htprot, sizeof(htprot));
1939
1940             priv->association_mode.greenfield =
1941                 cw1200_ht_greenfield(&priv->ht_info);
1942             priv->association_mode.flags =
1943                 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1944                 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1945                 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1946                 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1947                 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1948             priv->association_mode.preamble =
1949                 info->use_short_preamble ?
1950                 WSM_JOIN_PREAMBLE_SHORT :
1951                 WSM_JOIN_PREAMBLE_LONG;
1952             priv->association_mode.basic_rate_set = __cpu_to_le32(
1953                 cw1200_rate_mask_to_wsm(priv,
1954                             info->basic_rates));
1955             priv->association_mode.mpdu_start_spacing =
1956                 cw1200_ht_ampdu_density(&priv->ht_info);
1957
1958             cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1959             cancel_work_sync(&priv->unjoin_work);
1960
1961             priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1962             priv->bss_params.aid = vif->cfg.aid;
1963
1964             if (priv->join_dtim_period < 1)
1965                 priv->join_dtim_period = 1;
1966
1967             pr_debug("[STA] DTIM %d, interval: %d\n",
1968                  priv->join_dtim_period, priv->beacon_int);
1969             pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1970                  priv->association_mode.preamble,
1971                  priv->association_mode.greenfield,
1972                  priv->bss_params.aid,
1973                  priv->bss_params.operational_rate_set,
1974                  priv->association_mode.basic_rate_set);
1975             wsm_set_association_mode(priv, &priv->association_mode);
1976
1977             if (!vif->cfg.ibss_joined) {
1978                 wsm_keep_alive_period(priv, 30 /* sec */);
1979                 wsm_set_bss_params(priv, &priv->bss_params);
1980                 priv->setbssparams_done = true;
1981                 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1982                 cw1200_set_pm(priv, &priv->powersave_mode);
1983             }
1984             if (priv->vif->p2p) {
1985                 pr_debug("[STA] Setting p2p powersave configuration.\n");
1986                 wsm_set_p2p_ps_modeinfo(priv,
1987                             &priv->p2p_ps_modeinfo);
1988             }
1989             if (priv->bt_present)
1990                 cw1200_set_btcoexinfo(priv);
1991         } else {
1992             memset(&priv->association_mode, 0,
1993                    sizeof(priv->association_mode));
1994             memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1995         }
1996     }
1997
1998     /* ERP Protection */
1999     if (changed & (BSS_CHANGED_ASSOC |
2000                BSS_CHANGED_ERP_CTS_PROT |
2001                BSS_CHANGED_ERP_PREAMBLE)) {
2002         u32 prev_erp_info = priv->erp_info;
2003         if (info->use_cts_prot)
2004             priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2005         else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2006             priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2007
2008         if (info->use_short_preamble)
2009             priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2010         else
2011             priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2012
2013         pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2014
2015         if (prev_erp_info != priv->erp_info)
2016             queue_work(priv->workqueue, &priv->set_cts_work);
2017     }
2018
2019     /* ERP Slottime */
2020     if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2021         __le32 slot_time = info->use_short_slot ?
2022             __cpu_to_le32(9) : __cpu_to_le32(20);
2023         pr_debug("[STA] Slot time: %d us.\n",
2024              __le32_to_cpu(slot_time));
2025         wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2026                   &slot_time, sizeof(slot_time));
2027     }
2028
2029     if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2030         struct wsm_rcpi_rssi_threshold threshold = {
2031             .rollingAverageCount = 8,
2032         };
2033         pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2034              info->cqm_rssi_thold, info->cqm_rssi_hyst);
2035         priv->cqm_rssi_thold = info->cqm_rssi_thold;
2036         priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2037
2038         if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2039             /* RSSI subscription enabled */
2040             /* TODO: It's not a correct way of setting threshold.
2041              * Upper and lower must be set equal here and adjusted
2042              * in callback. However current implementation is much
2043              * more relaible and stable.
2044              */
2045
2046             /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2047              * RSSI = RCPI / 2 - 110
2048              */
2049             if (priv->cqm_use_rssi) {
2050                 threshold.upperThreshold =
2051                     info->cqm_rssi_thold + info->cqm_rssi_hyst;
2052                 threshold.lowerThreshold =
2053                     info->cqm_rssi_thold;
2054                 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2055             } else {
2056                 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2057                 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2058             }
2059             threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2060         } else {
2061             /* There is a bug in FW, see sta.c. We have to enable
2062              * dummy subscription to get correct RSSI values.
2063              */
2064             threshold.rssiRcpiMode |=
2065                 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2066                 WSM_RCPI_RSSI_DONT_USE_UPPER |
2067                 WSM_RCPI_RSSI_DONT_USE_LOWER;
2068             if (priv->cqm_use_rssi)
2069                 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2070         }
2071         wsm_set_rcpi_rssi_threshold(priv, &threshold);
2072     }
2073     mutex_unlock(&priv->conf_mutex);
2074
2075     if (do_join) {
2076         wsm_lock_tx(priv);
2077         cw1200_do_join(priv); /* Will unlock it for us */
2078     }
2079 }
2080
2081 void cw1200_multicast_start_work(struct work_struct *work)
2082 {
2083     struct cw1200_common *priv =
2084         container_of(work, struct cw1200_common, multicast_start_work);
2085     long tmo = priv->join_dtim_period *
2086             (priv->beacon_int + 20) * HZ / 1024;
2087
2088     cancel_work_sync(&priv->multicast_stop_work);
2089
2090     if (!priv->aid0_bit_set) {
2091         wsm_lock_tx(priv);
2092         cw1200_set_tim_impl(priv, true);
2093         priv->aid0_bit_set = true;
2094         mod_timer(&priv->mcast_timeout, jiffies + tmo);
2095         wsm_unlock_tx(priv);
2096     }
2097 }
2098
2099 void cw1200_multicast_stop_work(struct work_struct *work)
2100 {
2101     struct cw1200_common *priv =
2102         container_of(work, struct cw1200_common, multicast_stop_work);
2103
2104     if (priv->aid0_bit_set) {
2105         del_timer_sync(&priv->mcast_timeout);
2106         wsm_lock_tx(priv);
2107         priv->aid0_bit_set = false;
2108         cw1200_set_tim_impl(priv, false);
2109         wsm_unlock_tx(priv);
2110     }
2111 }
2112
2113 void cw1200_mcast_timeout(struct timer_list *t)
2114 {
2115     struct cw1200_common *priv = from_timer(priv, t, mcast_timeout);
2116
2117     wiphy_warn(priv->hw->wiphy,
2118            "Multicast delivery timeout.\n");
2119     spin_lock_bh(&priv->ps_state_lock);
2120     priv->tx_multicast = priv->aid0_bit_set &&
2121             priv->buffered_multicasts;
2122     if (priv->tx_multicast)
2123         cw1200_bh_wakeup(priv);
2124     spin_unlock_bh(&priv->ps_state_lock);
2125 }
2126
2127 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2128             struct ieee80211_vif *vif,
2129             struct ieee80211_ampdu_params *params)
2130 {
2131     /* Aggregation is implemented fully in firmware,
2132      * including block ack negotiation. Do not allow
2133      * mac80211 stack to do anything: it interferes with
2134      * the firmware.
2135      */
2136
2137     /* Note that we still need this function stubbed. */
2138     return -ENOTSUPP;
2139 }
2140
2141 /* ******************************************************************** */
2142 /* WSM callback                             */
2143 void cw1200_suspend_resume(struct cw1200_common *priv,
2144               struct wsm_suspend_resume *arg)
2145 {
2146     pr_debug("[AP] %s: %s\n",
2147          arg->stop ? "stop" : "start",
2148          arg->multicast ? "broadcast" : "unicast");
2149
2150     if (arg->multicast) {
2151         bool cancel_tmo = false;
2152         spin_lock_bh(&priv->ps_state_lock);
2153         if (arg->stop) {
2154             priv->tx_multicast = false;
2155         } else {
2156             /* Firmware sends this indication every DTIM if there
2157              * is a STA in powersave connected. There is no reason
2158              * to suspend, following wakeup will consume much more
2159              * power than it could be saved.
2160              */
2161             cw1200_pm_stay_awake(&priv->pm_state,
2162                          priv->join_dtim_period *
2163                          (priv->beacon_int + 20) * HZ / 1024);
2164             priv->tx_multicast = (priv->aid0_bit_set &&
2165                           priv->buffered_multicasts);
2166             if (priv->tx_multicast) {
2167                 cancel_tmo = true;
2168                 cw1200_bh_wakeup(priv);
2169             }
2170         }
2171         spin_unlock_bh(&priv->ps_state_lock);
2172         if (cancel_tmo)
2173             del_timer_sync(&priv->mcast_timeout);
2174     } else {
2175         spin_lock_bh(&priv->ps_state_lock);
2176         cw1200_ps_notify(priv, arg->link_id, arg->stop);
2177         spin_unlock_bh(&priv->ps_state_lock);
2178         if (!arg->stop)
2179             cw1200_bh_wakeup(priv);
2180     }
2181     return;
2182 }
2183
2184 /* ******************************************************************** */
2185 /* AP privates                              */
2186
2187 static int cw1200_upload_beacon(struct cw1200_common *priv)
2188 {
2189     int ret = 0;
2190     struct ieee80211_mgmt *mgmt;
2191     struct wsm_template_frame frame = {
2192         .frame_type = WSM_FRAME_TYPE_BEACON,
2193     };
2194
2195     u16 tim_offset;
2196     u16 tim_len;
2197
2198     if (priv->mode == NL80211_IFTYPE_STATION ||
2199         priv->mode == NL80211_IFTYPE_MONITOR ||
2200         priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2201         goto done;
2202
2203     if (priv->vif->p2p)
2204         frame.rate = WSM_TRANSMIT_RATE_6;
2205
2206     frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2207                          &tim_offset, &tim_len, 0);
2208     if (!frame.skb)
2209         return -ENOMEM;
2210
2211     ret = wsm_set_template_frame(priv, &frame);
2212
2213     if (ret)
2214         goto done;
2215
2216     /* TODO: Distill probe resp; remove TIM
2217      * and any other beacon-specific IEs
2218      */
2219     mgmt = (void *)frame.skb->data;
2220     mgmt->frame_control =
2221         __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2222                   IEEE80211_STYPE_PROBE_RESP);
2223
2224     frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2225     if (priv->vif->p2p) {
2226         ret = wsm_set_probe_responder(priv, true);
2227     } else {
2228         ret = wsm_set_template_frame(priv, &frame);
2229         wsm_set_probe_responder(priv, false);
2230     }
2231
2232 done:
2233     dev_kfree_skb(frame.skb);
2234
2235     return ret;
2236 }
2237
2238 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2239 {
2240     int ret = 0;
2241     struct wsm_template_frame frame = {
2242         .frame_type = WSM_FRAME_TYPE_PS_POLL,
2243         .rate = 0xFF,
2244     };
2245
2246
2247     frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2248     if (!frame.skb)
2249         return -ENOMEM;
2250
2251     ret = wsm_set_template_frame(priv, &frame);
2252
2253     dev_kfree_skb(frame.skb);
2254
2255     return ret;
2256 }
2257
2258 static int cw1200_upload_null(struct cw1200_common *priv)
2259 {
2260     int ret = 0;
2261     struct wsm_template_frame frame = {
2262         .frame_type = WSM_FRAME_TYPE_NULL,
2263         .rate = 0xFF,
2264     };
2265
2266     frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif, false);
2267     if (!frame.skb)
2268         return -ENOMEM;
2269
2270     ret = wsm_set_template_frame(priv, &frame);
2271
2272     dev_kfree_skb(frame.skb);
2273
2274     return ret;
2275 }
2276
2277 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2278 {
2279     /* TODO:  This needs to be implemented
2280
2281     struct wsm_template_frame frame = {
2282         .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2283         .rate = 0xFF,
2284     };
2285
2286     frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2287     if (!frame.skb)
2288         return -ENOMEM;
2289
2290     ret = wsm_set_template_frame(priv, &frame);
2291
2292     dev_kfree_skb(frame.skb);
2293
2294     */
2295     return 0;
2296 }
2297
2298 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2299                    bool enable)
2300 {
2301     struct wsm_beacon_transmit transmit = {
2302         .enable_beaconing = enable,
2303     };
2304
2305     return wsm_beacon_transmit(priv, &transmit);
2306 }
2307
2308 static int cw1200_start_ap(struct cw1200_common *priv)
2309 {
2310     int ret;
2311     struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2312     struct wsm_start start = {
2313         .mode = priv->vif->p2p ?
2314                 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2315         .band = (priv->channel->band == NL80211_BAND_5GHZ) ?
2316                 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2317         .channel_number = priv->channel->hw_value,
2318         .beacon_interval = conf->beacon_int,
2319         .dtim_period = conf->dtim_period,
2320         .preamble = conf->use_short_preamble ?
2321                 WSM_JOIN_PREAMBLE_SHORT :
2322                 WSM_JOIN_PREAMBLE_LONG,
2323         .probe_delay = 100,
2324         .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2325                 conf->basic_rates),
2326     };
2327     struct wsm_operational_mode mode = {
2328         .power_mode = cw1200_power_mode,
2329         .disable_more_flag_usage = true,
2330     };
2331
2332     memset(start.ssid, 0, sizeof(start.ssid));
2333     if (!conf->hidden_ssid) {
2334         start.ssid_len = priv->vif->cfg.ssid_len;
2335         memcpy(start.ssid, priv->vif->cfg.ssid, start.ssid_len);
2336     }
2337
2338     priv->beacon_int = conf->beacon_int;
2339     priv->join_dtim_period = conf->dtim_period;
2340
2341     memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2342
2343     pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2344          start.channel_number, start.band,
2345          start.beacon_interval, start.dtim_period,
2346          start.basic_rate_set,
2347          start.ssid_len, start.ssid);
2348     ret = wsm_start(priv, &start);
2349     if (!ret)
2350         ret = cw1200_upload_keys(priv);
2351     if (!ret && priv->vif->p2p) {
2352         pr_debug("[AP] Setting p2p powersave configuration.\n");
2353         wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2354     }
2355     if (!ret) {
2356         wsm_set_block_ack_policy(priv, 0, 0);
2357         priv->join_status = CW1200_JOIN_STATUS_AP;
2358         cw1200_update_filtering(priv);
2359     }
2360     wsm_set_operational_mode(priv, &mode);
2361     return ret;
2362 }
2363
2364 static int cw1200_update_beaconing(struct cw1200_common *priv)
2365 {
2366     struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2367     struct wsm_reset reset = {
2368         .link_id = 0,
2369         .reset_statistics = true,
2370     };
2371
2372     if (priv->mode == NL80211_IFTYPE_AP) {
2373         /* TODO: check if changed channel, band */
2374         if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2375             priv->beacon_int != conf->beacon_int) {
2376             pr_debug("ap restarting\n");
2377             wsm_lock_tx(priv);
2378             if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2379                 wsm_reset(priv, &reset);
2380             priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2381             cw1200_start_ap(priv);
2382             wsm_unlock_tx(priv);
2383         } else
2384             pr_debug("ap started join_status: %d\n",
2385                  priv->join_status);
2386     }
2387     return 0;
2388 }