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ath9k: use a timer to put hardware into full sleep

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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>
This commit is contained in:
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 |