From 61d7309562b51e9600f69ca70f9edf71f841fee7 Mon Sep 17 00:00:00 2001
From: Yan-Hsuan Chuang <yhchuang@realtek.com>
Date: Wed, 2 Oct 2019 10:31:19 +0800
Subject: [PATCH] rtw88: not to enter or leave PS under IRQ
Git-commit: 61d7309562b51e9600f69ca70f9edf71f841fee7
Patch-mainline: v5.5-rc1
References: jsc#SLE-13430, bsc#1176741
Remove PS related *_irqsafe functions to avoid entering/leaving PS
under interrupt context. Instead, make PS decision in watch_dog.
This could simplify the logic and make the code look clean.
But it could have a little side-effect that if the driver is having
heavy traffic before the every-2-second watch_dog detect the traffic
and decide to leave PS, the thoughput will be lower. Once traffic is
detected by watch_dog and left PS state, the throughput will resume
to the peak the hardware ought to have again.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/realtek/rtw88/main.c | 3 ++-
drivers/net/wireless/realtek/rtw88/main.h | 1 -
drivers/net/wireless/realtek/rtw88/ps.c | 44 -------------------------------
drivers/net/wireless/realtek/rtw88/ps.h | 3 ---
drivers/net/wireless/realtek/rtw88/rx.c | 2 --
drivers/net/wireless/realtek/rtw88/tx.c | 2 --
6 files changed, 2 insertions(+), 53 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 36ba2211faaf..22fc5d6f6b62 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -182,6 +182,8 @@ static void rtw_watch_dog_work(struct work_struct *work)
if (rtw_fw_support_lps &&
data.rtwvif && !data.active && data.assoc_cnt == 1)
rtw_enter_lps(rtwdev, data.rtwvif);
+ else
+ rtw_leave_lps(rtwdev, rtwdev->lps_conf.rtwvif);
if (test_bit(RTW_FLAG_SCANNING, rtwdev->flags))
return;
@@ -1152,7 +1154,6 @@ int rtw_core_init(struct rtw_dev *rtwdev)
rtw_tx_report_purge_timer, 0);
INIT_DELAYED_WORK(&rtwdev->watch_dog_work, rtw_watch_dog_work);
- INIT_DELAYED_WORK(&rtwdev->lps_work, rtw_lps_work);
INIT_DELAYED_WORK(&coex->bt_relink_work, rtw_coex_bt_relink_work);
INIT_DELAYED_WORK(&coex->bt_reenable_work, rtw_coex_bt_reenable_work);
INIT_DELAYED_WORK(&coex->defreeze_work, rtw_coex_defreeze_work);
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index 11ab9967617b..0955970d6f4d 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -1361,7 +1361,6 @@ struct rtw_dev {
/* lps power state & handler work */
struct rtw_lps_conf lps_conf;
- struct delayed_work lps_work;
struct dentry *debugfs;
diff --git a/drivers/net/wireless/realtek/rtw88/ps.c b/drivers/net/wireless/realtek/rtw88/ps.c
index 4896953ec4b9..ffba3bd7bb31 100644
--- a/drivers/net/wireless/realtek/rtw88/ps.c
+++ b/drivers/net/wireless/realtek/rtw88/ps.c
@@ -91,50 +91,6 @@ static void rtw_enter_lps_core(struct rtw_dev *rtwdev)
set_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
}
-void rtw_lps_work(struct work_struct *work)
-{
- struct rtw_dev *rtwdev = container_of(work, struct rtw_dev,
- lps_work.work);
- struct rtw_lps_conf *conf = &rtwdev->lps_conf;
- struct rtw_vif *rtwvif = conf->rtwvif;
-
- if (WARN_ON(!rtwvif))
- return;
-
- if (conf->mode == RTW_MODE_LPS)
- rtw_enter_lps_core(rtwdev);
- else
- rtw_leave_lps_core(rtwdev);
-}
-
-void rtw_enter_lps_irqsafe(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif)
-{
- struct rtw_lps_conf *conf = &rtwdev->lps_conf;
-
- if (rtwvif->in_lps)
- return;
-
- conf->mode = RTW_MODE_LPS;
- conf->rtwvif = rtwvif;
- rtwvif->in_lps = true;
-
- ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->lps_work, 0);
-}
-
-void rtw_leave_lps_irqsafe(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif)
-{
- struct rtw_lps_conf *conf = &rtwdev->lps_conf;
-
- if (!rtwvif->in_lps)
- return;
-
- conf->mode = RTW_MODE_ACTIVE;
- conf->rtwvif = rtwvif;
- rtwvif->in_lps = false;
-
- ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->lps_work, 0);
-}
-
bool rtw_in_lps(struct rtw_dev *rtwdev)
{
return test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
diff --git a/drivers/net/wireless/realtek/rtw88/ps.h b/drivers/net/wireless/realtek/rtw88/ps.h
index 09e57405dc1b..0ac6c2983a06 100644
--- a/drivers/net/wireless/realtek/rtw88/ps.h
+++ b/drivers/net/wireless/realtek/rtw88/ps.h
@@ -10,9 +10,6 @@
int rtw_enter_ips(struct rtw_dev *rtwdev);
int rtw_leave_ips(struct rtw_dev *rtwdev);
-void rtw_lps_work(struct work_struct *work);
-void rtw_enter_lps_irqsafe(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif);
-void rtw_leave_lps_irqsafe(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif);
void rtw_enter_lps(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif);
void rtw_leave_lps(struct rtw_dev *rtwdev, struct rtw_vif *rtwvif);
bool rtw_in_lps(struct rtw_dev *rtwdev);
diff --git a/drivers/net/wireless/realtek/rtw88/rx.c b/drivers/net/wireless/realtek/rtw88/rx.c
index 48b9ed49b79a..16b22eb57171 100644
--- a/drivers/net/wireless/realtek/rtw88/rx.c
+++ b/drivers/net/wireless/realtek/rtw88/rx.c
@@ -25,8 +25,6 @@ void rtw_rx_stats(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
rtwvif = (struct rtw_vif *)vif->drv_priv;
rtwvif->stats.rx_unicast += skb->len;
rtwvif->stats.rx_cnt++;
- if (rtwvif->stats.rx_cnt > RTW_LPS_THRESHOLD)
- rtw_leave_lps_irqsafe(rtwdev, rtwvif);
}
}
}
diff --git a/drivers/net/wireless/realtek/rtw88/tx.c b/drivers/net/wireless/realtek/rtw88/tx.c
index 8eaa9809ca44..91bfd8c28ff7 100644
--- a/drivers/net/wireless/realtek/rtw88/tx.c
+++ b/drivers/net/wireless/realtek/rtw88/tx.c
@@ -27,8 +27,6 @@ void rtw_tx_stats(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
rtwvif = (struct rtw_vif *)vif->drv_priv;
rtwvif->stats.tx_unicast += skb->len;
rtwvif->stats.tx_cnt++;
- if (rtwvif->stats.tx_cnt > RTW_LPS_THRESHOLD)
- rtw_leave_lps_irqsafe(rtwdev, rtwvif);
}
}
}
--
2.16.4