[PATCH wireless-next v4 3/3] wifi: mac80211_hwsim: add incumbent signal interference detection support

[Amith A <amith.a@oss.qualcomm.com>]

From: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>

Add a debugfs 'simulate_incumbent_signal_interference' which calls the
function ieee80211_incumbent_signal_detected() to report that incumbent
signal interference has been detected on the current 6 GHz operating
channel. The written value is a bitmap of affected 20 MHz segments.

Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Signed-off-by: Amith A <amith.a@oss.qualcomm.com>
---
 drivers/net/wireless/virtual/mac80211_hwsim.c | 33 +++++++++++++++++++
 drivers/net/wireless/virtual/mac80211_hwsim.h |  2 ++
 2 files changed, 35 insertions(+)

diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c
index 4d9f5f87e814..f1105f97504b 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.c
@@ -1164,6 +1164,36 @@ static int hwsim_write_simulate_radar(void *dat, u64 val)
 DEFINE_DEBUGFS_ATTRIBUTE(hwsim_simulate_radar, NULL,
 			 hwsim_write_simulate_radar, "%llu\n");
 
+static void hwsim_6ghz_chanctx_iter(struct ieee80211_hw *hw,
+				    struct ieee80211_chanctx_conf *conf,
+				    void *data)
+{
+	struct ieee80211_chanctx_conf **out = data;
+
+	if (conf->def.chan && conf->def.chan->band == NL80211_BAND_6GHZ)
+		*out = conf;
+}
+
+static int hwsim_write_simulate_incumbent_signal(void *dat, u64 val)
+{
+	struct mac80211_hwsim_data *data = dat;
+	struct ieee80211_chanctx_conf *chanctx_conf = NULL;
+
+	ieee80211_iter_chan_contexts_atomic(data->hw,
+					    hwsim_6ghz_chanctx_iter,
+					    &chanctx_conf);
+
+	if (!chanctx_conf)
+		return -EINVAL;
+
+	ieee80211_incumbent_signal_detected(data->hw, chanctx_conf, (u32)val);
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(hwsim_simulate_incumbent_signal, NULL,
+			 hwsim_write_simulate_incumbent_signal, "%llu\n");
+
 static int hwsim_fops_group_read(void *dat, u64 *val)
 {
 	struct mac80211_hwsim_data *data = dat;
@@ -5832,6 +5862,9 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
 		debugfs_create_file("dfs_simulate_radar", 0222,
 				    data->debugfs,
 				    data, &hwsim_simulate_radar);
+	debugfs_create_file("simulate_incumbent_signal_interference", 0200,
+			    data->debugfs,
+			    data, &hwsim_simulate_incumbent_signal);
 
 	if (param->pmsr_capa) {
 		data->pmsr_capa = *param->pmsr_capa;
diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.h b/drivers/net/wireless/virtual/mac80211_hwsim.h
index c2d06cf852a5..d897aa720ec2 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.h
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.h
@@ -343,4 +343,6 @@ enum hwsim_rate_info_attributes {
 	HWSIM_RATE_INFO_ATTR_MAX = NUM_HWSIM_RATE_INFO_ATTRS - 1
 };
 
+/* no longer used - previously used for debugfs iterator */
+
 #endif /* __MAC80211_HWSIM_H */
-- 
2.34.1