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authorJohannes Berg <johannes@sipsolutions.net>2009-12-01 13:37:02 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-12-22 13:31:16 -0500
commit0f78231bffb868a30e8533aace142213266bb811 (patch)
tree317f65dc6d89e9a89ad83f94fadd780dd1e0ca83 /net/mac80211/cfg.c
parent18974b5b0b5e758d416c550553b143e5c8038281 (diff)
downloadlinux-0f78231bffb868a30e8533aace142213266bb811.tar.bz2
mac80211: enable spatial multiplexing powersave
Enable spatial multiplexing in mac80211 by telling the driver what to do and, where necessary, sending action frames to the AP to update the requested SMPS mode. Also includes a trivial implementation for hwsim that just logs the requested mode. For now, the userspace interface is in debugfs only, and let you toggle the requested mode at any time. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/cfg.c')
-rw-r--r--net/mac80211/cfg.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index fcfa1bf776a7..8c35418d1c96 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1318,6 +1318,50 @@ static int ieee80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)
}
#endif
+int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
+ enum ieee80211_smps_mode smps_mode)
+{
+ const u8 *ap;
+ enum ieee80211_smps_mode old_req;
+ int err;
+
+ old_req = sdata->u.mgd.req_smps;
+ sdata->u.mgd.req_smps = smps_mode;
+
+ if (old_req == smps_mode &&
+ smps_mode != IEEE80211_SMPS_AUTOMATIC)
+ return 0;
+
+ /*
+ * If not associated, or current association is not an HT
+ * association, there's no need to send an action frame.
+ */
+ if (!sdata->u.mgd.associated ||
+ sdata->local->oper_channel_type == NL80211_CHAN_NO_HT) {
+ mutex_lock(&sdata->local->iflist_mtx);
+ ieee80211_recalc_smps(sdata->local, sdata);
+ mutex_unlock(&sdata->local->iflist_mtx);
+ return 0;
+ }
+
+ ap = sdata->u.mgd.associated->cbss.bssid;
+
+ if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
+ if (sdata->u.mgd.powersave)
+ smps_mode = IEEE80211_SMPS_DYNAMIC;
+ else
+ smps_mode = IEEE80211_SMPS_OFF;
+ }
+
+ /* send SM PS frame to AP */
+ err = ieee80211_send_smps_action(sdata, smps_mode,
+ ap, ap);
+ if (err)
+ sdata->u.mgd.req_smps = old_req;
+
+ return err;
+}
+
static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
bool enabled, int timeout)
{
@@ -1335,6 +1379,11 @@ static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
sdata->u.mgd.powersave = enabled;
conf->dynamic_ps_timeout = timeout;
+ /* no change, but if automatic follow powersave */
+ mutex_lock(&sdata->u.mgd.mtx);
+ __ieee80211_request_smps(sdata, sdata->u.mgd.req_smps);
+ mutex_unlock(&sdata->u.mgd.mtx);
+
if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);