[PATCH v2 3/3] ath10k: add debugfs file to control radar events blocking

[Marek Puzyniak]

Sometimes for DFS testing is required to stay on current channel even after
radar detected. This patch allows to enable/disable radar detected event to be
passed to mac80211.

By default radar detected event in not blocked.

To block it:
echo 1 > /sys/kernel/debug/ieee80211/phyX/ath10k/dfs_block_radar_events

To unblock again:
echo 0 > /sys/kernel/debug/ieee80211/phyX/ath10k/dfs_block_radar_events

Inform about blocking radar detected event even when logs are disabled
for throughput/performance reasons.

Signed-off-by: Marek Puzyniak <marek.puzyniak at tieto.com>
Signed-off-by: Michal Kazior <michal.kazior at tieto.com>
---
 drivers/net/wireless/ath/ath10k/core.h  | 1 +
 drivers/net/wireless/ath/ath10k/debug.c | 4 ++++
 drivers/net/wireless/ath/ath10k/wmi.c   | 8 ++++++++
 3 files changed, 13 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index d5fd74b..cdedcbf 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -409,6 +409,7 @@ struct ath10k {
 	bool monitor_present;
 	unsigned int filter_flags;
 	unsigned long dev_flags;
+	u32 dfs_block_radar_events;
 
 	struct wmi_pdev_set_wmm_params_arg wmm_params;
 	struct completion install_key_done;
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 13705d4..6bdfad3 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -752,6 +752,10 @@ int ath10k_debug_create(struct ath10k *ar)
 				    ar->debug.debugfs_phy, ar,
 				    &fops_simulate_radar);
 
+		debugfs_create_bool("dfs_block_radar_events", S_IWUSR,
+				    ar->debug.debugfs_phy,
+				    &ar->dfs_block_radar_events);
+
 		debugfs_create_file("dfs_stats", S_IRUSR,
 				    ar->debug.debugfs_phy, ar,
 				    &fops_dfs_stats);
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index aea81d9..c654137 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1453,6 +1453,14 @@ static void ath10k_dfs_radar_report(struct ath10k *ar,
 
 	ath10k_dbg(ATH10K_DBG_REGULATORY, "dfs radar detected\n");
 	ATH10K_DFS_STAT_INC(ar, radar_detected);
+
+	/* Control radar events reporting in debugfs file
+	   dfs_block_radar_events */
+	if (ar->dfs_block_radar_events) {
+		ath10k_info("DFS Radar detected, but ignored as requested\n");
+		return;
+	}
+
 	ieee80211_radar_detected(ar->hw);
 }
 
-- 
1.8.1.2