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authorKalle Valo <kalle.valo@nokia.com>2008-12-18 23:35:27 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-12-19 15:24:00 -0500
commit520eb82076993b7f55ef9b80771d264272e5127b (patch)
treef98b74dbe404d4c3a55b5f649c25ca24958e62ba /include
parentce7c9111a97492d04c504f40736a669c235d664a (diff)
downloadop-kernel-dev-520eb82076993b7f55ef9b80771d264272e5127b.zip
op-kernel-dev-520eb82076993b7f55ef9b80771d264272e5127b.tar.gz
mac80211: implement dynamic power save
This patch implements dynamic power save for mac80211. Basically it means enabling power save mode after an idle period. Implementing it dynamically gives a good compromise of low power consumption and low latency. Some hardware have support for this in firmware, but some require the host to do it. The dynamic power save is implemented by adding an timeout to ieee80211_subif_start_xmit(). The timeout can be enabled from userspace with Wireless Extensions. For example, the command below enables the dynamic power save and sets the time timeout to 500 ms: iwconfig wlan0 power timeout 500m Power save now only works with devices which handle power save in firmware. It's also disabled by default and the heuristics when and how to enable is considered as a policy decision and will be left for the userspace to handle. In case the firmware has support for this, drivers can disable this feature with IEEE80211_HW_NO_STACK_DYNAMIC_PS. Big thanks to Johannes Berg for the help with the design and code. Signed-off-by: Kalle Valo <kalle.valo@nokia.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include')
-rw-r--r--include/net/mac80211.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9428d3e..b3bd00a 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -854,6 +854,11 @@ enum ieee80211_tkip_key_type {
*
* @IEEE80211_HW_AMPDU_AGGREGATION:
* Hardware supports 11n A-MPDU aggregation.
+ *
+ * @IEEE80211_HW_NO_STACK_DYNAMIC_PS:
+ * Hardware which has dynamic power save support, meaning
+ * that power save is enabled in idle periods, and don't need support
+ * from stack.
*/
enum ieee80211_hw_flags {
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
@@ -866,6 +871,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_NOISE_DBM = 1<<8,
IEEE80211_HW_SPECTRUM_MGMT = 1<<9,
IEEE80211_HW_AMPDU_AGGREGATION = 1<<10,
+ IEEE80211_HW_NO_STACK_DYNAMIC_PS = 1<<11,
};
/**
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