From 21f659bf1f93f7052b977d95cca560f02dc2edce Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Mon, 11 Nov 2013 20:14:01 +0200 Subject: mac80211: add min required channel definition field Add a new field to ieee80211_chanctx_conf to indicate the min required channel configuration. Tuning to a narrower channel might help reducing the noise level and saving some power. The min required channel definition is the max of all min required channel definitions of the interfaces bound to this channel context. In AP mode, use 20MHz when there are no connected station. When a new station is added/removed, calculate the new max bandwidth supported by any of the stations (e.g. 80MHz when 80MHz and 40MHz stations are connected). In other cases, simply use bss_conf.chandef as the min required chandef. Notify drivers about changes to this field by calling drv_change_chanctx with a new CHANGE_MIN_WIDTH notification. Signed-off-by: Eliad Peller Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- include/net/mac80211.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net/mac80211.h') diff --git a/include/net/mac80211.h b/include/net/mac80211.h index cca02b2f5c7..3cd408b326d 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -154,12 +154,14 @@ struct ieee80211_low_level_stats { * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, * this is used only with channel switching with CSA + * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed */ enum ieee80211_chanctx_change { IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), + IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), }; /** @@ -169,6 +171,7 @@ enum ieee80211_chanctx_change { * that contains it is visible in mac80211 only. * * @def: the channel definition + * @min_def: the minimum channel definition currently required. * @rx_chains_static: The number of RX chains that must always be * active on the channel to receive MIMO transmissions * @rx_chains_dynamic: The number of RX chains that must be enabled @@ -180,6 +183,7 @@ enum ieee80211_chanctx_change { */ struct ieee80211_chanctx_conf { struct cfg80211_chan_def def; + struct cfg80211_chan_def min_def; u8 rx_chains_static, rx_chains_dynamic; -- cgit v1.2.3-70-g09d2