wifi: ath12k: debugfs: radar simulation support

Create dfs_simulate_radar debugfs in ath12k debugfs directory.

Usage:

echo 1 > /sys/kernel/debug/ath12k/pci-0000:06:00.0/mac0/dfs_simulate_radar

This debugfs helps user to simulate RADAR interference in run time.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Signed-off-by: Ramya Gnanasekar <quic_rgnanase@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240320171305.655288-3-quic_rgnanase@quicinc.com

diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c
index 65f3c8bf3f10e1a234e15182072cc670f98ba866..8d8ba951093b3b186479469ceb1226f68e205e2b 100644 (file)
--- a/drivers/net/wireless/ath/ath12k/debugfs.c
+++ b/drivers/net/wireless/ath/ath12k/debugfs.c
@@ -7,6 +7,29 @@
 #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;
@@ -58,4 +81,10 @@ void ath12k_debugfs_register(struct ath12k *ar)
        /* 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);
+       }
 }