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mac80211: use DECLARE_EWMA 

Instead of using the out-of-line average calculation, use the new
DECLARE_EWMA() macro to declare a signal EWMA, and use that.

This actually *reduces* the code size slightly (on x86-64) while
also reducing the station info size by 80 bytes.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-07-13 12:26:46 +02:00
parent 2377799c08
commit 40d9a38ad3
5 changed files with 12 additions and 10 deletions
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1
net/mac80211/Kconfig
View File

@ -7,7 +7,6 @@ config MAC80211
select CRYPTO_CCM
select CRYPTO_GCM
select CRC32
select AVERAGE
---help---
This option enables the hardware independent IEEE 802.11
networking stack.

2
net/mac80211/mesh_plink.c
View File

@ -60,7 +60,7 @@ static bool rssi_threshold_check(struct ieee80211_sub_if_data *sdata,
{
s32 rssi_threshold = sdata->u.mesh.mshcfg.rssi_threshold;
return rssi_threshold == 0 ||
(sta && (s8) -ewma_read(&sta->avg_signal) > rssi_threshold);
(sta && (s8) -ewma_signal_read(&sta->avg_signal) > rssi_threshold);
}
/**

4
net/mac80211/rx.c
View File

@ -1428,7 +1428,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
sta->rx_bytes += rx->skb->len;
if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {
sta->last_signal = status->signal;
ewma_add(&sta->avg_signal, -status->signal);
ewma_signal_add(&sta->avg_signal, -status->signal);
}
if (status->chains) {
@ -1440,7 +1440,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
continue;
sta->chain_signal_last[i] = signal;
ewma_add(&sta->chain_signal_avg[i], -signal);
ewma_signal_add(&sta->chain_signal_avg[i], -signal);
}
}

9
net/mac80211/sta_info.c
View File

@ -341,9 +341,9 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
ktime_get_ts(&uptime);
sta->last_connected = uptime.tv_sec;
ewma_init(&sta->avg_signal, 1024, 8);
ewma_signal_init(&sta->avg_signal);
for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
ewma_init(&sta->chain_signal_avg[i], 1024, 8);
ewma_signal_init(&sta->chain_signal_avg[i]);
if (local->ops->wake_tx_queue) {
void *txq_data;
@ -1896,7 +1896,8 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
}
if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
sinfo->signal_avg =
(s8) -ewma_signal_read(&sta->avg_signal);
sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
}
}
@ -1911,7 +1912,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
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]);
(s8) -ewma_signal_read(&sta->chain_signal_avg[i]);
}
}

6
net/mac80211/sta_info.h
View File

@ -320,6 +320,8 @@ struct mesh_sta {
unsigned int fail_avg;
};
DECLARE_EWMA(signal, 1024, 8)
/**
* struct sta_info - STA information
*
@ -462,12 +464,12 @@ struct sta_info {
unsigned long rx_fragments;
unsigned long rx_dropped;
int last_signal;
struct ewma avg_signal;
struct ewma_signal avg_signal;
int last_ack_signal;
u8 chains;
s8 chain_signal_last[IEEE80211_MAX_CHAINS];
struct ewma chain_signal_avg[IEEE80211_MAX_CHAINS];
struct ewma_signal chain_signal_avg[IEEE80211_MAX_CHAINS];
/* Plus 1 for non-QoS frames */
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];