net: microchip: sparx5: Add VCAP debugFS support

Add a debugFS root folder for Sparx5 and add a vcap folder underneath with
the VCAP instances and the ports

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 93 insertions, 0 deletions

diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
new file mode 100644
index 000000000000..0c7557b1ed81
--- /dev/null
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip VCAP API debug file system support
+ *
+ * Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/netdevice.h>
+
+#include "vcap_api_debugfs.h"
+
+struct vcap_admin_debugfs_info {
+	struct vcap_control *vctrl;
+	struct vcap_admin *admin;
+};
+
+struct vcap_port_debugfs_info {
+	struct vcap_control *vctrl;
+	struct net_device *ndev;
+};
+
+/* Show the port configuration and status */
+static int vcap_port_debugfs_show(struct seq_file *m, void *unused)
+{
+	struct vcap_port_debugfs_info *info = m->private;
+	struct vcap_admin *admin;
+	struct vcap_output_print out = {
+		.prf = (void *)seq_printf,
+		.dst = m,
+	};
+
+	list_for_each_entry(admin, &info->vctrl->list, list) {
+		if (admin->vinst)
+			continue;
+		info->vctrl->ops->port_info(info->ndev, admin, &out);
+	}
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(vcap_port_debugfs);
+
+void vcap_port_debugfs(struct device *dev, struct dentry *parent,
+		       struct vcap_control *vctrl,
+		       struct net_device *ndev)
+{
+	struct vcap_port_debugfs_info *info;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return;
+
+	info->vctrl = vctrl;
+	info->ndev = ndev;
+	debugfs_create_file(netdev_name(ndev), 0444, parent, info,
+			    &vcap_port_debugfs_fops);
+}
+EXPORT_SYMBOL_GPL(vcap_port_debugfs);
+
+/* Show the raw VCAP instance data (rules with address info) */
+static int vcap_raw_debugfs_show(struct seq_file *m, void *unused)
+{
+	/* The output will be added later */
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(vcap_raw_debugfs);
+
+struct dentry *vcap_debugfs(struct device *dev, struct dentry *parent,
+			    struct vcap_control *vctrl)
+{
+	struct vcap_admin_debugfs_info *info;
+	struct vcap_admin *admin;
+	struct dentry *dir;
+	char name[50];
+
+	dir = debugfs_create_dir("vcaps", parent);
+	if (PTR_ERR_OR_ZERO(dir))
+		return NULL;
+	list_for_each_entry(admin, &vctrl->list, list) {
+		sprintf(name, "raw_%s_%d", vctrl->vcaps[admin->vtype].name,
+			admin->vinst);
+		info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+		if (!info)
+			return NULL;
+		info->vctrl = vctrl;
+		info->admin = admin;
+		debugfs_create_file(name, 0444, dir, info,
+				    &vcap_raw_debugfs_fops);
+	}
+	return dir;
+}
+EXPORT_SYMBOL_GPL(vcap_debugfs);