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-rw-r--r--net/mac80211/cfg.c9
-rw-r--r--net/mac80211/debugfs_netdev.c12
-rw-r--r--net/mac80211/ieee80211_i.h19
-rw-r--r--net/mac80211/mlme.c45
4 files changed, 82 insertions, 3 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index a4ca425e4f3f..4edd73cbf052 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1415,9 +1415,6 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
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;
@@ -1425,6 +1422,12 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
bss_conf->cqm_rssi_thold = rssi_thold;
bss_conf->cqm_rssi_hyst = rssi_hyst;
+ if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ return -EOPNOTSUPP;
+ return 0;
+ }
+
/* tell the driver upon association, unless already associated */
if (sdata->u.mgd.associated)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 9affe2cd185f..ee61a9f6fabc 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -95,6 +95,14 @@ static ssize_t ieee80211_if_fmt_##name( \
return scnprintf(buf, buflen, "%pM\n", sdata->field); \
}
+#define IEEE80211_IF_FMT_DEC_DIV_16(name, field) \
+static ssize_t ieee80211_if_fmt_##name( \
+ const struct ieee80211_sub_if_data *sdata, \
+ char *buf, int buflen) \
+{ \
+ return scnprintf(buf, buflen, "%d\n", sdata->field / 16); \
+}
+
#define __IEEE80211_IF_FILE(name, _write) \
static ssize_t ieee80211_if_read_##name(struct file *file, \
char __user *userbuf, \
@@ -135,6 +143,8 @@ IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ],
/* STA attributes */
IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
+IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
+IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
enum ieee80211_smps_mode smps_mode)
@@ -271,6 +281,8 @@ static void add_sta_files(struct ieee80211_sub_if_data *sdata)
DEBUGFS_ADD(bssid);
DEBUGFS_ADD(aid);
+ DEBUGFS_ADD(last_beacon);
+ DEBUGFS_ADD(ave_beacon);
DEBUGFS_ADD_MODE(smps, 0600);
}
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index ab369e2a5282..741fb8bbc4a0 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -317,6 +317,7 @@ enum ieee80211_sta_flags {
IEEE80211_STA_MFP_ENABLED = BIT(6),
IEEE80211_STA_UAPSD_ENABLED = BIT(7),
IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
+ IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
};
struct ieee80211_if_managed {
@@ -359,6 +360,24 @@ struct ieee80211_if_managed {
int wmm_last_param_set;
u8 use_4addr;
+
+ /* Signal strength from the last Beacon frame in the current BSS. */
+ int last_beacon_signal;
+
+ /*
+ * Weighted average of the signal strength from Beacon frames in the
+ * current BSS. This is in units of 1/16 of the signal unit to maintain
+ * accuracy and to speed up calculations, i.e., the value need to be
+ * divided by 16 to get the actual value.
+ */
+ int ave_beacon_signal;
+
+ /*
+ * Last Beacon frame signal strength average (ave_beacon_signal / 16)
+ * that triggered a cqm event. 0 indicates that no event has been
+ * generated for the current association.
+ */
+ int last_cqm_event_signal;
};
enum ieee80211_ibss_request {
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index c686d1b90f9f..de7519eb2b5d 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -46,6 +46,13 @@
*/
#define IEEE80211_PROBE_WAIT (HZ / 2)
+/*
+ * Weight given to the latest Beacon frame when calculating average signal
+ * strength for Beacon frames received in the current BSS. This must be
+ * between 1 and 15.
+ */
+#define IEEE80211_SIGNAL_AVE_WEIGHT 3
+
#define TMR_RUNNING_TIMER 0
#define TMR_RUNNING_CHANSW 1
@@ -732,6 +739,8 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
sdata->u.mgd.associated = cbss;
memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
+ sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
+
/* just to be sure */
sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
IEEE80211_STA_BEACON_POLL);
@@ -1347,6 +1356,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
struct ieee80211_rx_status *rx_status)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
size_t baselen;
struct ieee802_11_elems elems;
struct ieee80211_local *local = sdata->local;
@@ -1382,6 +1392,41 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
return;
+ /* Track average RSSI from the Beacon frames of the current AP */
+ ifmgd->last_beacon_signal = rx_status->signal;
+ if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
+ ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
+ ifmgd->ave_beacon_signal = rx_status->signal;
+ ifmgd->last_cqm_event_signal = 0;
+ } else {
+ ifmgd->ave_beacon_signal =
+ (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
+ (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
+ ifmgd->ave_beacon_signal) / 16;
+ }
+ if (bss_conf->cqm_rssi_thold &&
+ !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
+ int sig = ifmgd->ave_beacon_signal / 16;
+ int last_event = ifmgd->last_cqm_event_signal;
+ int thold = bss_conf->cqm_rssi_thold;
+ int hyst = bss_conf->cqm_rssi_hyst;
+ if (sig < thold &&
+ (last_event == 0 || sig < last_event - hyst)) {
+ ifmgd->last_cqm_event_signal = sig;
+ ieee80211_cqm_rssi_notify(
+ &sdata->vif,
+ NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
+ GFP_KERNEL);
+ } else if (sig > thold &&
+ (last_event == 0 || sig > last_event + hyst)) {
+ ifmgd->last_cqm_event_signal = sig;
+ ieee80211_cqm_rssi_notify(
+ &sdata->vif,
+ NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
+ GFP_KERNEL);
+ }
+ }
+
if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
if (net_ratelimit()) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 08:50:17 +0000