Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:11815 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753129Ab2JJISU (ORCPT ); Wed, 10 Oct 2012 04:18:20 -0400 From: Rajkumar Manoharan To: CC: , Rajkumar Manoharan Subject: [PATCH] ath9k: perform ani cycle in idle state Date: Wed, 10 Oct 2012 13:48:02 +0530 Message-ID: <1349857082-19255-1-git-send-email-rmanohar@qca.qualcomm.com> (sfid-20121010_101826_850145_7678A375) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: As of now the ANI cycle is only be executed when chip is awake. On idle state case, the station wakes up from network sleep for beacon reception. Since most of the time, ANI cycle is not syncing with beacon reception, it was ignored. Approx 5 mins once, the calibration was performed. This coule affect the connection stability if the station is idle for long. Even though the OFDM and CCK phy error rates are too high, ANI is unable to tune its immunity level as quick enough due to rare execution. Here the experiment shows that OFDM and CCK were stick with default level on higher phy error rate. listenTime=44 OFDM:3 errs=121977/s CCK:2 errs=440818/s ofdm_turn=1 After this change, ANI calibration was exectued for every 10 seconds if it was ignored. The below result shows improvements and immunity levels were adopted quick enough. listenTime=557 OFDM:4 errs=752/s CCK:4 errs=125/s ofdm_turn=0 Signed-off-by: Rajkumar Manoharan --- drivers/net/wireless/ath/ath9k/ath9k.h | 2 ++ drivers/net/wireless/ath/ath9k/hw.h | 1 + drivers/net/wireless/ath/ath9k/link.c | 12 +++++++++++- drivers/net/wireless/ath/ath9k/main.c | 3 ++- 4 files changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index dfe6a47..77c2c16 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -437,6 +437,7 @@ void ath9k_set_beacon(struct ath_softc *sc); #define ATH_LONG_CALINTERVAL_INT 1000 /* 1000 ms */ #define ATH_LONG_CALINTERVAL 30000 /* 30 seconds */ #define ATH_RESTART_CALINTERVAL 1200000 /* 20 minutes */ +#define ATH_ANI_MAX_SKIP_COUNT 10 #define ATH_PAPRD_TIMEOUT 100 /* msecs */ #define ATH_PLL_WORK_INTERVAL 100 @@ -642,6 +643,7 @@ enum sc_op_flags { #define PS_WAIT_FOR_PSPOLL_DATA BIT(2) #define PS_WAIT_FOR_TX_ACK BIT(3) #define PS_BEACON_SYNC BIT(4) +#define PS_WAIT_FOR_ANI BIT(5) struct ath_rate_table; diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index dbc1b7a..1d4f5f1 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -834,6 +834,7 @@ struct ath_hw { int coarse_low[5]; int firpwr[5]; enum ath9k_ani_cmd ani_function; + u32 ani_skip_count; #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT struct ath_btcoex_hw btcoex_hw; diff --git a/drivers/net/wireless/ath/ath9k/link.c b/drivers/net/wireless/ath/ath9k/link.c index 7b88b9c..223b969 100644 --- a/drivers/net/wireless/ath/ath9k/link.c +++ b/drivers/net/wireless/ath/ath9k/link.c @@ -350,8 +350,18 @@ void ath_ani_calibrate(unsigned long data) ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL; /* Only calibrate if awake */ - if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) + if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) { + if (++ah->ani_skip_count >= ATH_ANI_MAX_SKIP_COUNT) { + spin_lock_irqsave(&sc->sc_pm_lock, flags); + sc->ps_flags |= PS_WAIT_FOR_ANI; + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + } goto set_timer; + } + ah->ani_skip_count = 0; + spin_lock_irqsave(&sc->sc_pm_lock, flags); + sc->ps_flags &= ~PS_WAIT_FOR_ANI; + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); ath9k_ps_wakeup(sc); diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index dd45edf..2da62be 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -131,7 +131,8 @@ void ath9k_ps_restore(struct ath_softc *sc) !(sc->ps_flags & (PS_WAIT_FOR_BEACON | PS_WAIT_FOR_CAB | PS_WAIT_FOR_PSPOLL_DATA | - PS_WAIT_FOR_TX_ACK))) { + PS_WAIT_FOR_TX_ACK | + PS_WAIT_FOR_ANI))) { mode = ATH9K_PM_NETWORK_SLEEP; if (ath9k_hw_btcoex_is_enabled(sc->sc_ah)) ath9k_btcoex_stop_gen_timer(sc); -- 1.7.12.2