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nl80211/mac80211: Report signal average

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Extend nl80211 to report an exponential weighted moving average (EWMA) of the
signal value. Since the signal value usually fluctuates between different
packets, an average can be more useful than the value of the last packet.

This uses the recently added generic EWMA library function.

--
v2:	fix ABI breakage and change factor to be a power of 2.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf
2010-12-02 19:12:43 +09:00
committed by John W. Linville
parent 22de94de7d
commit 541a45a142
8 changed files with 18 additions and 1 deletions
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2
include/linux/nl80211.h
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@@ -1191,6 +1191,7 @@ enum nl80211_rate_info {
* station)
* @NL80211_STA_INFO_TX_RETRIES: total retries (u32, to this station)
* @NL80211_STA_INFO_TX_FAILED: total failed packets (u32, to this station)
* @NL80211_STA_INFO_SIGNAL_AVG: signal strength average (u8, dBm)
*/
enum nl80211_sta_info {
__NL80211_STA_INFO_INVALID,
@@ -1206,6 +1207,7 @@ enum nl80211_sta_info {
NL80211_STA_INFO_TX_PACKETS,
NL80211_STA_INFO_TX_RETRIES,
NL80211_STA_INFO_TX_FAILED,
NL80211_STA_INFO_SIGNAL_AVG,
/* keep last */
__NL80211_STA_INFO_AFTER_LAST,