From 4dc3530df7c0428b41c00399a7ee8c929406d181 Mon Sep 17 00:00:00 2001 From: Mohammed Shafi Shajakhan Date: Tue, 14 Dec 2010 13:18:28 +0530 Subject: [PATCH] ath9k: Make PM-QOS value as user configurable This patch allows the pm-qos value to be user configurable by making it as a module parameter.This will help our customers to configure the pm-qos value according to the effect in throughput due to the DMA latency problem which was observed in Intel Pinetrail platforms. The tested value of '55' will be filled as the default pm-qos-value incase the user does not specifies pm-qos value as a module parameter. example usage: sudo modprobe ath9k pmqos=65 Cc: Senthilkumar Balasubramanian Signed-off-by: Mohammed Shafi Shajakhan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ath9k.h | 3 +++ drivers/net/wireless/ath/ath9k/init.c | 4 ++++ drivers/net/wireless/ath/ath9k/main.c | 2 +- 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 9b5501f9001..b0b1216dae0 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -57,6 +57,8 @@ struct ath_node; #define A_MAX(a, b) ((a) > (b) ? (a) : (b)) +#define ATH9K_PM_QOS_DEFAULT_VALUE 55 + #define TSF_TO_TU(_h,_l) \ ((((u32)(_h)) << 22) | (((u32)(_l)) >> 10)) @@ -663,6 +665,7 @@ static inline void ath_read_cachesize(struct ath_common *common, int *csz) extern struct ieee80211_ops ath9k_ops; extern int modparam_nohwcrypt; extern int led_blink; +extern int ath9k_pm_qos_value; irqreturn_t ath_isr(int irq, void *dev); int ath9k_init_device(u16 devid, struct ath_softc *sc, u16 subsysid, diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index b2983ce19df..12387950b44 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -41,6 +41,10 @@ static int ath9k_btcoex_enable; module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444); MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence"); +int ath9k_pm_qos_value = ATH9K_PM_QOS_DEFAULT_VALUE; +module_param_named(pmqos, ath9k_pm_qos_value, int, S_IRUSR | S_IRGRP | S_IROTH); +MODULE_PARM_DESC(pmqos, "User specified PM-QOS value"); + /* We use the hw_value as an index into our private channel structure */ #define CHAN2G(_freq, _idx) { \ diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index c68205dea1f..36f4f5afe73 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -1196,7 +1196,7 @@ static int ath9k_start(struct ieee80211_hw *hw) ath9k_btcoex_timer_resume(sc); } - pm_qos_update_request(&sc->pm_qos_req, 55); + pm_qos_update_request(&sc->pm_qos_req, ath9k_pm_qos_value); if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en) common->bus_ops->extn_synch_en(common); -- 2.20.1