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mac80211: Add support for connection quality monitoring

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Add support for the set_cqm_config op. This op function configures the
requested connection quality monitor rssi threshold and rssi hysteresis
values to the hardware  if the hardware supports
IEEE80211_HW_SUPPORTS_CQM.

For unsupported hardware, currently -EOPNOTSUPP is returned, so the mac80211
is currently not doing connection quality monitoring on the host. This could be
added later, if needed.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Juuso Oikarinen 2010-03-23 09:02:34 +02:00 committed by John W. Linville
parent d6dc1a3863
commit a97c13c345
3 changed files with 72 additions and 0 deletions
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30
include/net/mac80211.h
View file

@ -144,6 +144,7 @@ struct ieee80211_low_level_stats {
* new beacon (beaconing modes)
* @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
* enabled/disabled (beaconing modes)
* @BSS_CHANGED_CQM: Connection quality monitor config changed
*/
enum ieee80211_bss_change {
BSS_CHANGED_ASSOC = 1<<0,
@ -156,6 +157,7 @@ enum ieee80211_bss_change {
BSS_CHANGED_BSSID = 1<<7,
BSS_CHANGED_BEACON = 1<<8,
BSS_CHANGED_BEACON_ENABLED = 1<<9,
BSS_CHANGED_CQM = 1<<10,
};
/**
@ -185,6 +187,9 @@ enum ieee80211_bss_change {
* @enable_beacon: whether beaconing should be enabled or not
* @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info).
* This field is only valid when the channel type is one of the HT types.
* @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value
* implies disabled
* @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis
*/
struct ieee80211_bss_conf {
const u8 *bssid;
@ -202,6 +207,8 @@ struct ieee80211_bss_conf {
u64 timestamp;
u32 basic_rates;
u16 ht_operation_mode;
s32 cqm_rssi_thold;
u32 cqm_rssi_hyst;
};
/**
@ -959,6 +966,12 @@ enum ieee80211_tkip_key_type {
* periodic keep-alives to the AP and probing the AP on beacon loss.
* When this flag is set, signaling beacon-loss will cause an immediate
* change to disassociated state.
*
* @IEEE80211_HW_SUPPORTS_CQM_RSSI:
* Hardware can do connection quality monitoring - i.e. it can monitor
* connection quality related parameters, such as the RSSI level and
* provide notifications if configured trigger levels are reached.
*
*/
enum ieee80211_hw_flags {
IEEE80211_HW_HAS_RATE_CONTROL = 1<<0,
@ -981,6 +994,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_SUPPORTS_UAPSD = 1<<17,
IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18,
IEEE80211_HW_CONNECTION_MONITOR = 1<<19,
IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20,
};
/**
@ -2390,6 +2404,22 @@ void ieee80211_beacon_loss(struct ieee80211_vif *vif);
*/
void ieee80211_connection_loss(struct ieee80211_vif *vif);
/**
* ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring
* rssi threshold triggered
*
* @vif: &struct ieee80211_vif pointer from the add_interface callback.
* @rssi_event: the RSSI trigger event type
* @gfp: context flags
*
* When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality
* monitoring is configured with an rssi threshold, the driver will inform
* whenever the rssi level reaches the threshold.
*/
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp);
/* Rate control API */
/**

27
net/mac80211/cfg.c
View file

@ -1402,6 +1402,32 @@ static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
return 0;
}
static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
struct net_device *dev,
s32 rssi_thold, u32 rssi_hyst)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_vif *vif = &sdata->vif;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI))
return -EOPNOTSUPP;
if (rssi_thold == bss_conf->cqm_rssi_thold &&
rssi_hyst == bss_conf->cqm_rssi_hyst)
return 0;
bss_conf->cqm_rssi_thold = rssi_thold;
bss_conf->cqm_rssi_hyst = rssi_hyst;
/* tell the driver upon association, unless already associated */
if (sdata->u.mgd.associated)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
return 0;
}
static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
struct net_device *dev,
const u8 *addr,
@ -1506,4 +1532,5 @@ struct cfg80211_ops mac80211_config_ops = {
.remain_on_channel = ieee80211_remain_on_channel,
.cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
.action = ieee80211_action,
.set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
};

15
net/mac80211/mlme.c
View file

@ -750,6 +750,11 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
/* And the BSSID changed - we're associated now */
bss_info_changed |= BSS_CHANGED_BSSID;
/* Tell the driver to monitor connection quality (if supported) */
if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
sdata->vif.bss_conf.cqm_rssi_thold)
bss_info_changed |= BSS_CHANGED_CQM;
ieee80211_bss_info_change_notify(sdata, bss_info_changed);
mutex_lock(&local->iflist_mtx);
@ -2182,3 +2187,13 @@ int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
*cookie = (unsigned long) skb;
return 0;
}
void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
}
EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);