diff options
| -rw-r--r-- | include/net/mac80211.h | 14 | ||||
| -rw-r--r-- | net/mac80211/cfg.c | 36 | ||||
| -rw-r--r-- | net/mac80211/chan.c | 33 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 14 | ||||
| -rw-r--r-- | net/mac80211/iface.c | 12 | ||||
| -rw-r--r-- | net/mac80211/main.c | 13 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 13 | ||||
| -rw-r--r-- | net/mac80211/pm.c | 2 | ||||
| -rw-r--r-- | net/mac80211/scan.c | 3 | ||||
| -rw-r--r-- | net/mac80211/trace.h | 19 | ||||
| -rw-r--r-- | net/mac80211/util.c | 46 |
11 files changed, 204 insertions, 1 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 0eaa909..7241962 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -147,10 +147,12 @@ struct ieee80211_low_level_stats { * enum ieee80211_chanctx_change - change flag for channel context * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed + * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed */ enum ieee80211_chanctx_change { IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), + IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), }; /** @@ -165,6 +167,7 @@ enum ieee80211_chanctx_change { * @rx_chains_dynamic: The number of RX chains that must be enabled * after RTS/CTS handshake to receive SMPS MIMO transmissions; * this will always be >= @rx_chains_static. + * @radar_enabled: whether radar detection is enabled on this channel. * @drv_priv: data area for driver use, will always be aligned to * sizeof(void *), size is determined in hw information. */ @@ -173,6 +176,8 @@ struct ieee80211_chanctx_conf { u8 rx_chains_static, rx_chains_dynamic; + bool radar_enabled; + u8 drv_priv[0] __aligned(sizeof(void *)); }; @@ -967,6 +972,7 @@ enum ieee80211_smps_mode { * * @channel: the channel to tune to * @channel_type: the channel (HT) type + * @radar_enabled: whether radar detection is enabled * * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, @@ -993,6 +999,7 @@ struct ieee80211_conf { struct ieee80211_channel *channel; enum nl80211_channel_type channel_type; + bool radar_enabled; enum ieee80211_smps_mode smps_mode; }; @@ -3945,6 +3952,13 @@ void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, gfp_t gfp); /** + * ieee80211_radar_detected - inform that a radar was detected + * + * @hw: pointer as obtained from ieee80211_alloc_hw() + */ +void ieee80211_radar_detected(struct ieee80211_hw *hw); + +/** * ieee80211_chswitch_done - Complete channel switch process * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @success: make the channel switch successful or not diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index e3dec80..0969978 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -928,6 +928,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, /* TODO: make hostapd tell us what it wants */ sdata->smps_mode = IEEE80211_SMPS_OFF; sdata->needed_rx_chains = sdata->local->rx_chains; + sdata->radar_required = params->radar_required; err = ieee80211_vif_use_channel(sdata, ¶ms->chandef, IEEE80211_CHANCTX_SHARED); @@ -2395,7 +2396,8 @@ static int ieee80211_start_roc_work(struct ieee80211_local *local, INIT_LIST_HEAD(&roc->dependents); /* if there's one pending or we're scanning, queue this one */ - if (!list_empty(&local->roc_list) || local->scanning) + if (!list_empty(&local->roc_list) || + local->scanning || local->radar_detect_enabled) goto out_check_combine; /* if not HW assist, just queue & schedule work */ @@ -2645,6 +2647,37 @@ static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy, return ieee80211_cancel_roc(local, cookie, false); } +static int ieee80211_start_radar_detection(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_chan_def *chandef) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; + unsigned long timeout; + int err; + + if (!list_empty(&local->roc_list) || local->scanning) + return -EBUSY; + + /* whatever, but channel contexts should not complain about that one */ + sdata->smps_mode = IEEE80211_SMPS_OFF; + sdata->needed_rx_chains = local->rx_chains; + sdata->radar_required = true; + + mutex_lock(&local->iflist_mtx); + err = ieee80211_vif_use_channel(sdata, chandef, + IEEE80211_CHANCTX_SHARED); + mutex_unlock(&local->iflist_mtx); + if (err) + return err; + + timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS); + ieee80211_queue_delayed_work(&sdata->local->hw, + &sdata->dfs_cac_timer_work, timeout); + + return 0; +} + static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, struct ieee80211_channel *chan, bool offchan, unsigned int wait, const u8 *buf, size_t len, @@ -3350,4 +3383,5 @@ struct cfg80211_ops mac80211_config_ops = { .get_et_stats = ieee80211_get_et_stats, .get_et_strings = ieee80211_get_et_strings, .get_channel = ieee80211_cfg_get_channel, + .start_radar_detection = ieee80211_start_radar_detection, }; diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 038f249..2e6faed 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -193,6 +193,7 @@ static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata, if (ctx->refcount > 0) { ieee80211_recalc_chanctx_chantype(sdata->local, ctx); ieee80211_recalc_smps_chanctx(local, ctx); + ieee80211_recalc_radar_chanctx(local, ctx); } } @@ -216,6 +217,37 @@ static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) ieee80211_free_chanctx(local, ctx); } +void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *chanctx) +{ + struct ieee80211_sub_if_data *sdata; + bool radar_enabled = false; + + lockdep_assert_held(&local->chanctx_mtx); + + rcu_read_lock(); + list_for_each_entry_rcu(sdata, &local->interfaces, list) { + if (sdata->radar_required) { + radar_enabled = true; + break; + } + } + rcu_read_unlock(); + + if (radar_enabled == chanctx->conf.radar_enabled) + return; + + chanctx->conf.radar_enabled = radar_enabled; + local->radar_detect_enabled = chanctx->conf.radar_enabled; + + if (!local->use_chanctx) { + local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; + ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); + } + + drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); +} + void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, struct ieee80211_chanctx *chanctx) { @@ -331,6 +363,7 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, } ieee80211_recalc_smps_chanctx(local, ctx); + ieee80211_recalc_radar_chanctx(local, ctx); out: mutex_unlock(&local->chanctx_mtx); return ret; diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 76cdcfc..0e0a977 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -722,6 +722,9 @@ struct ieee80211_sub_if_data { int user_power_level; /* in dBm */ int ap_power_level; /* in dBm */ + bool radar_required; + struct delayed_work dfs_cac_timer_work; + /* * AP this belongs to: self in AP mode and * corresponding AP in VLAN mode, NULL for @@ -942,6 +945,10 @@ struct ieee80211_local { /* wowlan is enabled -- don't reconfig on resume */ bool wowlan; + /* DFS/radar detection is enabled */ + bool radar_detect_enabled; + struct work_struct radar_detected_work; + /* number of RX chains the hardware has */ u8 rx_chains; @@ -1606,6 +1613,13 @@ void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, struct ieee80211_chanctx *chanctx); +void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *chanctx); + +void ieee80211_dfs_cac_timer(unsigned long data); +void ieee80211_dfs_cac_timer_work(struct work_struct *work); +void ieee80211_dfs_cac_cancel(struct ieee80211_local *local); +void ieee80211_dfs_radar_detected_work(struct work_struct *work); #ifdef CONFIG_MAC80211_NOINLINE #define debug_noinline noinline diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 40ff030..e9223ce 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -749,6 +749,16 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, cancel_work_sync(&sdata->recalc_smps); + cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); + + if (sdata->wdev.cac_started) { + mutex_lock(&local->iflist_mtx); + ieee80211_vif_release_channel(sdata); + mutex_unlock(&local->iflist_mtx); + cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED, + GFP_KERNEL); + } + /* APs need special treatment */ if (sdata->vif.type == NL80211_IFTYPE_AP) { struct ieee80211_sub_if_data *vlan, *tmpsdata; @@ -1513,6 +1523,8 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name, spin_lock_init(&sdata->cleanup_stations_lock); INIT_LIST_HEAD(&sdata->cleanup_stations); INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk); + INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, + ieee80211_dfs_cac_timer_work); for (i = 0; i < IEEE80211_NUM_BANDS; i++) { struct ieee80211_supported_band *sband; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 38b3468..9cdbc77 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -621,6 +621,9 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, INIT_WORK(&local->restart_work, ieee80211_restart_work); + INIT_WORK(&local->radar_detected_work, + ieee80211_dfs_radar_detected_work); + INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); local->smps_mode = IEEE80211_SMPS_OFF; @@ -713,6 +716,16 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) */ if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) return -EINVAL; + + /* DFS currently not supported with channel context drivers */ + for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { + const struct ieee80211_iface_combination *comb; + + comb = &local->hw.wiphy->iface_combinations[i]; + + if (comb->radar_detect_widths) + return -EINVAL; + } } /* Only HW csum features are currently compatible with mac80211 */ diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index efb2276..7d4cde7 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1212,6 +1212,19 @@ void ieee80211_dynamic_ps_timer(unsigned long data) ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); } +void ieee80211_dfs_cac_timer_work(struct work_struct *work) +{ + struct delayed_work *delayed_work = + container_of(work, struct delayed_work, work); + struct ieee80211_sub_if_data *sdata = + container_of(delayed_work, struct ieee80211_sub_if_data, + dfs_cac_timer_work); + + ieee80211_vif_release_channel(sdata); + + cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL); +} + /* MLME */ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 53801d2..d0275f3 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -38,6 +38,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) ieee80211_scan_cancel(local); + ieee80211_dfs_cac_cancel(local); + if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { mutex_lock(&local->sta_mtx); list_for_each_entry(sta, &local->sta_list, list) { diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 6d0b89e..43a45cf 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -351,6 +351,9 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local) static bool ieee80211_can_scan(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { + if (local->radar_detect_enabled) + return false; + if (!list_empty(&local->roc_list)) return false; diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index 0bdd7ae..1183c4a 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -1862,6 +1862,25 @@ TRACE_EVENT(drv_set_default_unicast_key, LOCAL_PR_ARG, VIF_PR_ARG, __entry->key_idx) ); +TRACE_EVENT(api_radar_detected, + TP_PROTO(struct ieee80211_local *local), + + TP_ARGS(local), + + TP_STRUCT__entry( + LOCAL_ENTRY + ), + + TP_fast_assign( + LOCAL_ASSIGN; + ), + + TP_printk( + LOCAL_PR_FMT " radar detected", + LOCAL_PR_ARG + ) +); + #ifdef CONFIG_MAC80211_MESSAGE_TRACING #undef TRACE_SYSTEM #define TRACE_SYSTEM mac80211_msg diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 6cb71a3..218cb52 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2133,3 +2133,49 @@ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, return ts; } + +void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) +{ + struct ieee80211_sub_if_data *sdata; + + mutex_lock(&local->iflist_mtx); + list_for_each_entry(sdata, &local->interfaces, list) { + cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); + + if (sdata->wdev.cac_started) { + ieee80211_vif_release_channel(sdata); + cfg80211_cac_event(sdata->dev, + NL80211_RADAR_CAC_ABORTED, + GFP_KERNEL); + } + } + mutex_unlock(&local->iflist_mtx); +} + +void ieee80211_dfs_radar_detected_work(struct work_struct *work) +{ + struct ieee80211_local *local = + container_of(work, struct ieee80211_local, radar_detected_work); + struct cfg80211_chan_def chandef; + + ieee80211_dfs_cac_cancel(local); + + if (local->use_chanctx) + /* currently not handled */ + WARN_ON(1); + else { + cfg80211_chandef_create(&chandef, local->hw.conf.channel, + local->hw.conf.channel_type); + cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); + } +} + +void ieee80211_radar_detected(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + trace_api_radar_detected(local); + + ieee80211_queue_work(hw, &local->radar_detected_work); +} +EXPORT_SYMBOL(ieee80211_radar_detected); |
