wifi: iwlwifi: mvm: Add debugfs entry for triggering internal MLO scan

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240319100755.3dd3e8c42c27.I9434dc641b837601c72f10684fbfad2c0fb31a99@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c

@@ -692,6 +692,60 @@ static ssize_t iwl_dbgfs_quota_min_read(struct file *file,
 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
 
+static ssize_t iwl_dbgfs_int_mlo_scan_write(struct ieee80211_vif *vif,
+					    char *buf, size_t count,
+					    loff_t *ppos)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_mvm *mvm = mvmvif->mvm;
+	u32 action;
+	int ret;
+
+	if (!vif->cfg.assoc || !ieee80211_vif_is_mld(vif))
+		return -EINVAL;
+
+	if (kstrtou32(buf, 0, &action))
+		return -EINVAL;
+
+	mutex_lock(&mvm->mutex);
+
+	if (!action) {
+		ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_INT_MLO, false);
+	} else if (action == 1) {
+		struct ieee80211_channel *channels[IEEE80211_MLD_MAX_NUM_LINKS];
+		unsigned long usable_links = ieee80211_vif_usable_links(vif);
+		size_t n_channels = 0;
+		u8 link_id;
+
+		rcu_read_lock();
+
+		for_each_set_bit(link_id, &usable_links,
+				 IEEE80211_MLD_MAX_NUM_LINKS) {
+			struct ieee80211_bss_conf *link_conf =
+				rcu_dereference(vif->link_conf[link_id]);
+
+			if (WARN_ON_ONCE(!link_conf))
+				continue;
+
+			channels[n_channels++] = link_conf->chanreq.oper.chan;
+		}
+
+		rcu_read_unlock();
+
+		if (n_channels)
+			ret = iwl_mvm_int_mlo_scan_start(mvm, vif, channels,
+							 n_channels);
+		else
+			ret = -EINVAL;
+	} else {
+		ret = -EINVAL;
+	}
+
+	mutex_unlock(&mvm->mutex);
+
+	return ret ?: count;
+}
+
 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@@ -711,6 +765,7 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
+MVM_DEBUGFS_WRITE_FILE_OPS(int_mlo_scan, 32);
 
 void iwl_mvm_vif_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 {
@@ -738,6 +793,7 @@ void iwl_mvm_vif_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 	MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600);
 	MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600);
 	MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400);
+	MVM_DEBUGFS_ADD_FILE_VIF(int_mlo_scan, mvmvif->dbgfs_dir, 0200);
 
 	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 	    mvmvif == mvm->bf_allowed_vif)