Commit ef0621e8 authored by Felix Fietkau's avatar Felix Fietkau Committed by Johannes Berg

mac80211: add support for per-chain signal strength reporting

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
[fix unit documentation]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 119363c7
......@@ -850,6 +850,10 @@ enum mac80211_rx_flags {
* @signal: signal strength when receiving this frame, either in dBm, in dB or
* unspecified depending on the hardware capabilities flags
* @IEEE80211_HW_SIGNAL_*
* @chains: bitmask of receive chains for which separate signal strength
* values were filled.
* @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't
* support dB or unspecified units)
* @antenna: antenna used
* @rate_idx: index of data rate into band's supported rates or MCS index if
* HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT)
......@@ -881,6 +885,8 @@ struct ieee80211_rx_status {
u8 band;
u8 antenna;
s8 signal;
u8 chains;
s8 chain_signal[IEEE80211_MAX_CHAINS];
u8 ampdu_delimiter_crc;
u8 vendor_radiotap_align;
u8 vendor_radiotap_oui[3];
......
......@@ -444,7 +444,7 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
struct ieee80211_local *local = sdata->local;
struct timespec uptime;
u64 packets = 0;
int ac;
int i, ac;
sinfo->generation = sdata->local->sta_generation;
......@@ -488,6 +488,17 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
sinfo->signal = (s8)sta->last_signal;
sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
}
if (sta->chains) {
sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
STATION_INFO_CHAIN_SIGNAL_AVG;
sinfo->chains = sta->chains;
for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
sinfo->chain_signal[i] = sta->chain_signal_last[i];
sinfo->chain_signal_avg[i] =
(s8) -ewma_read(&sta->chain_signal_avg[i]);
}
}
sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
sta_set_rate_info_rx(sta, &sinfo->rxrate);
......
......@@ -1372,6 +1372,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
struct sk_buff *skb = rx->skb;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
int i;
if (!sta)
return RX_CONTINUE;
......@@ -1422,6 +1423,19 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
ewma_add(&sta->avg_signal, -status->signal);
}
if (status->chains) {
sta->chains = status->chains;
for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) {
int signal = status->chain_signal[i];
if (!(status->chains & BIT(i)))
continue;
sta->chain_signal_last[i] = signal;
ewma_add(&sta->chain_signal_avg[i], -signal);
}
}
/*
* Change STA power saving mode only at the end of a frame
* exchange sequence.
......
......@@ -358,6 +358,8 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
do_posix_clock_monotonic_gettime(&uptime);
sta->last_connected = uptime.tv_sec;
ewma_init(&sta->avg_signal, 1024, 8);
for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
ewma_init(&sta->chain_signal_avg[i], 1024, 8);
if (sta_prepare_rate_control(local, sta, gfp)) {
kfree(sta);
......
......@@ -344,6 +344,11 @@ struct sta_info {
int last_signal;
struct ewma avg_signal;
int last_ack_signal;
u8 chains;
s8 chain_signal_last[IEEE80211_MAX_CHAINS];
struct ewma chain_signal_avg[IEEE80211_MAX_CHAINS];
/* Plus 1 for non-QoS frames */
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
......
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