1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c
new file mode 100644
index 000000000000..8d8ba951093b
--- /dev/null
+++ b/drivers/net/wireless/ath/ath12k/debugfs.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include "core.h"
+#include "debugfs.h"
+
+static ssize_t ath12k_write_simulate_radar(struct file *file,
+					   const char __user *user_buf,
+					   size_t count, loff_t *ppos)
+{
+	struct ath12k *ar = file->private_data;
+	int ret;
+
+	mutex_lock(&ar->conf_mutex);
+	ret = ath12k_wmi_simulate_radar(ar);
+	if (ret)
+		goto exit;
+
+	ret = count;
+exit:
+	mutex_unlock(&ar->conf_mutex);
+	return ret;
+}
+
+static const struct file_operations fops_simulate_radar = {
+	.write = ath12k_write_simulate_radar,
+	.open = simple_open
+};
+
+void ath12k_debugfs_soc_create(struct ath12k_base *ab)
+{
+	bool dput_needed;
+	char soc_name[64] = { 0 };
+	struct dentry *debugfs_ath12k;
+
+	debugfs_ath12k = debugfs_lookup("ath12k", NULL);
+	if (debugfs_ath12k) {
+		/* a dentry from lookup() needs dput() after we don't use it */
+		dput_needed = true;
+	} else {
+		debugfs_ath12k = debugfs_create_dir("ath12k", NULL);
+		if (IS_ERR_OR_NULL(debugfs_ath12k))
+			return;
+		dput_needed = false;
+	}
+
+	scnprintf(soc_name, sizeof(soc_name), "%s-%s", ath12k_bus_str(ab->hif.bus),
+		  dev_name(ab->dev));
+
+	ab->debugfs_soc = debugfs_create_dir(soc_name, debugfs_ath12k);
+
+	if (dput_needed)
+		dput(debugfs_ath12k);
+}
+
+void ath12k_debugfs_soc_destroy(struct ath12k_base *ab)
+{
+	debugfs_remove_recursive(ab->debugfs_soc);
+	ab->debugfs_soc = NULL;
+	/* We are not removing ath12k directory on purpose, even if it
+	 * would be empty. This simplifies the directory handling and it's
+	 * a minor cosmetic issue to leave an empty ath12k directory to
+	 * debugfs.
+	 */
+}
+
+void ath12k_debugfs_register(struct ath12k *ar)
+{
+	struct ath12k_base *ab = ar->ab;
+	struct ieee80211_hw *hw = ar->ah->hw;
+	char pdev_name[5];
+	char buf[100] = {0};
+
+	scnprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx);
+
+	ar->debug.debugfs_pdev = debugfs_create_dir(pdev_name, ab->debugfs_soc);
+
+	/* Create a symlink under ieee80211/phy* */
+	scnprintf(buf, sizeof(buf), "../../ath12k/%pd2", ar->debug.debugfs_pdev);
+	debugfs_create_symlink("ath12k", hw->wiphy->debugfsdir, buf);
+
+	if (ar->mac.sbands[NL80211_BAND_5GHZ].channels) {
+		debugfs_create_file("dfs_simulate_radar", 0200,
+				    ar->debug.debugfs_pdev, ar,
+				    &fops_simulate_radar);
+	}
+}