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ath9k: use a timer to put hardware into full sleep 

When operating in client mode, the short period of time between scanning
and associating is often enough to put the hardware through several
FULL-SLEEP <-> AWAKE transitions, each wakeup requiring a reset to fully
recover the hardware.
This is completely unnecessary and can easily be avoided by deferring
the switch to full sleep.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
hifive-unleashed-5.1
Felix Fietkau 2013-11-11 22:23:33 +01:00 committed by John W. Linville
parent f28c785f37
commit bf3dac5a6f
3 changed files with 26 additions and 5 deletions
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2
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -459,6 +459,7 @@ void ath_check_ani(struct ath_softc *sc);
int ath_update_survey_stats(struct ath_softc *sc);
void ath_update_survey_nf(struct ath_softc *sc, int channel);
void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type);
void ath_ps_full_sleep(unsigned long data);
/**********/
/* BTCOEX */
@ -789,6 +790,7 @@ struct ath_softc {
struct delayed_work tx_complete_work;
struct delayed_work hw_pll_work;
struct timer_list rx_poll_timer;
struct timer_list sleep_timer;
#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
struct ath_btcoex btcoex;

2
drivers/net/wireless/ath/ath9k/init.c
View File

@ -738,6 +738,7 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
(unsigned long)sc);
setup_timer(&sc->sleep_timer, ath_ps_full_sleep, (unsigned long)sc);
INIT_WORK(&sc->hw_reset_work, ath_reset_work);
INIT_WORK(&sc->hw_check_work, ath_hw_check);
INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
@ -1049,6 +1050,7 @@ static void ath9k_deinit_softc(struct ath_softc *sc)
if (ATH_TXQ_SETUP(sc, i))
ath_tx_cleanupq(sc, &sc->tx.txq[i]);
del_timer_sync(&sc->sleep_timer);
ath9k_hw_deinit(sc->sc_ah);
if (sc->dfs_detector != NULL)
sc->dfs_detector->exit(sc->dfs_detector);

27
drivers/net/wireless/ath/ath9k/main.c
View File

@ -82,6 +82,22 @@ static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
return ret;
}
void ath_ps_full_sleep(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *) data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
bool reset;
spin_lock(&common->cc_lock);
ath_hw_cycle_counters_update(common);
spin_unlock(&common->cc_lock);
ath9k_hw_setrxabort(sc->sc_ah, 1);
ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
}
void ath9k_ps_wakeup(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
@ -92,6 +108,7 @@ void ath9k_ps_wakeup(struct ath_softc *sc)
if (++sc->ps_usecount != 1)
goto unlock;
del_timer_sync(&sc->sleep_timer);
power_mode = sc->sc_ah->power_mode;
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
@ -117,17 +134,17 @@ void ath9k_ps_restore(struct ath_softc *sc)
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
enum ath9k_power_mode mode;
unsigned long flags;
bool reset;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (--sc->ps_usecount != 0)
goto unlock;
if (sc->ps_idle) {
ath9k_hw_setrxabort(sc->sc_ah, 1);
ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
mode = ATH9K_PM_FULL_SLEEP;
} else if (sc->ps_enabled &&
mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
goto unlock;
}
if (sc->ps_enabled &&
!(sc->ps_flags & (PS_WAIT_FOR_BEACON |
PS_WAIT_FOR_CAB |
PS_WAIT_FOR_PSPOLL_DATA |