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From:   Carl Huang <quic_cjhuang@quicinc.com>
To:     <ath11k@lists.infradead.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH v2 4/6] ath11k: purge rx pktlog when entering WoW
Date:   Thu, 20 Jan 2022 18:13:25 +0800
Message-ID: <1642673607-8896-5-git-send-email-quic_cjhuang@quicinc.com>
In-Reply-To: <1642673607-8896-1-git-send-email-quic_cjhuang@quicinc.com>
References: <1642673607-8896-1-git-send-email-quic_cjhuang@quicinc.com>
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This change is to purge rx pktlog when entering WoW and reap
the mon_status buffer to keep it empty. When leaving WoW, host
restarts the reap timer. In WoW state, it's not allowed to feed
into mon_status rings per firmware team's recommendation.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1

Signed-off-by: Carl Huang <quic_cjhuang@quicinc.com>
---
 drivers/net/wireless/ath/ath11k/core.c  |  3 +--
 drivers/net/wireless/ath/ath11k/dp_rx.c |  1 -
 drivers/net/wireless/ath/ath11k/wow.c   | 23 +++++++++++++++++++++++
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index 1acb2d1..136e2fe 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -478,8 +478,7 @@ int ath11k_core_resume(struct ath11k_base *ab)
 
 	ret = ath11k_dp_rx_pktlog_start(ab);
 	if (ret) {
-		ath11k_warn(ab, "failed to start rx pktlog during resume: %d\n",
-			    ret);
+		ath11k_warn(ab, "failed to start rx pktlog during resume: %d\n", ret);
 		return ret;
 	}
 
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index 38eeb6e..18eeb84 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -5609,7 +5609,6 @@ int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab)
 	/* start reap timer */
 	mod_timer(&ab->mon_reap_timer,
 		  jiffies + msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
-
 	return 0;
 }
 
diff --git a/drivers/net/wireless/ath/ath11k/wow.c b/drivers/net/wireless/ath/ath11k/wow.c
index 63577e0..f798b5c 100644
--- a/drivers/net/wireless/ath/ath11k/wow.c
+++ b/drivers/net/wireless/ath/ath11k/wow.c
@@ -13,6 +13,7 @@
 #include "debug.h"
 #include "wmi.h"
 #include "wow.h"
+#include "dp_rx.h"
 
 static const struct wiphy_wowlan_support ath11k_wowlan_support = {
 	.flags = WIPHY_WOWLAN_DISCONNECT |
@@ -562,6 +563,14 @@ int ath11k_wow_op_suspend(struct ieee80211_hw *hw,
 
 	mutex_lock(&ar->conf_mutex);
 
+	ret = ath11k_dp_rx_pktlog_stop(ar->ab, true);
+	if (ret) {
+		ath11k_warn(ar->ab,
+			    "failed to stop dp rx (and timer) pktlog during wow suspend: %d\n",
+			    ret);
+		goto exit;
+	}
+
 	ret =  ath11k_wow_cleanup(ar);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to clear wow wakeup events: %d\n",
@@ -595,6 +604,14 @@ int ath11k_wow_op_suspend(struct ieee80211_hw *hw,
 		goto cleanup;
 	}
 
+	ret = ath11k_dp_rx_pktlog_stop(ar->ab, false);
+	if (ret) {
+		ath11k_warn(ar->ab,
+			    "failed to stop dp rx pktlog during wow suspend: %d\n",
+			    ret);
+		goto cleanup;
+	}
+
 	ath11k_ce_stop_shadow_timers(ar->ab);
 	ath11k_dp_stop_shadow_timers(ar->ab);
 
@@ -645,6 +662,12 @@ int ath11k_wow_op_resume(struct ieee80211_hw *hw)
 	ath11k_hif_ce_irq_enable(ar->ab);
 	ath11k_hif_irq_enable(ar->ab);
 
+	ret = ath11k_dp_rx_pktlog_start(ar->ab);
+	if (ret) {
+		ath11k_warn(ar->ab, "failed to start rx pktlog from wow: %d\n", ret);
+		return ret;
+	}
+
 	ret = ath11k_wow_wakeup(ar->ab);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to wakeup from wow: %d\n", ret);
-- 
2.7.4