Commit 195e294d authored by Juuso Oikarinen's avatar Juuso Oikarinen Committed by John W. Linville

mac80211: Determine dynamic PS timeout based on ps-qos network latency

Determine the dynamic PS timeout based on the configured ps-qos network
latency. For backwards wext compatibility, allow the dynamic PS timeout
configured by the cfg80211 to overrule the automatically determined value.
Signed-off-by: default avatarJuuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 3a374952
......@@ -668,6 +668,9 @@ enum ieee80211_smps_mode {
* @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
* powersave documentation below. This variable is valid only when
* the CONF_PS flag is set.
* @dynamic_ps_forced_timeout: The dynamic powersave timeout (in ms) configured
* by cfg80211 (essentially, wext) If set, this value overrules the value
* chosen by mac80211 based on ps qos network latency.
*
* @power_level: requested transmit power (in dBm)
*
......@@ -687,7 +690,7 @@ enum ieee80211_smps_mode {
*/
struct ieee80211_conf {
u32 flags;
int power_level, dynamic_ps_timeout;
int power_level, dynamic_ps_timeout, dynamic_ps_forced_timeout;
int max_sleep_period;
u16 listen_interval;
......
......@@ -1404,11 +1404,11 @@ static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
return -EOPNOTSUPP;
if (enabled == sdata->u.mgd.powersave &&
timeout == conf->dynamic_ps_timeout)
timeout == conf->dynamic_ps_forced_timeout)
return 0;
sdata->u.mgd.powersave = enabled;
conf->dynamic_ps_timeout = timeout;
conf->dynamic_ps_forced_timeout = timeout;
/* no change, but if automatic follow powersave */
mutex_lock(&sdata->u.mgd.mtx);
......
......@@ -569,6 +569,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
local->hw.conf.listen_interval = local->hw.max_listen_interval;
local->hw.conf.dynamic_ps_forced_timeout = -1;
result = sta_info_start(local);
if (result < 0)
goto fail_sta_info;
......
......@@ -475,6 +475,7 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
{
struct ieee80211_sub_if_data *sdata, *found = NULL;
int count = 0;
int timeout;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
local->ps_sdata = NULL;
......@@ -508,6 +509,26 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
beaconint_us = ieee80211_tu_to_usec(
found->vif.bss_conf.beacon_int);
timeout = local->hw.conf.dynamic_ps_forced_timeout;
if (timeout < 0) {
/*
* The 2 second value is there for compatibility until
* the PM_QOS_NETWORK_LATENCY is configured with real
* values.
*/
if (latency == 2000000000)
timeout = 100;
else if (latency <= 50000)
timeout = 300;
else if (latency <= 100000)
timeout = 100;
else if (latency <= 500000)
timeout = 50;
else
timeout = 0;
}
local->hw.conf.dynamic_ps_timeout = timeout;
if (beaconint_us > latency) {
local->ps_sdata = NULL;
} else {
......
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