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// SPDX-License-Identifier: GPL-2.0-only
/*
* debugfs code for HSR & PRP
* Copyright (C) 2019 Texas Instruments Incorporated
*
* Author(s):
* Murali Karicheri <m-karicheri2@ti.com>
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/debugfs.h>
#include <linux/jhash.h>
#include "hsr_main.h"
#include "hsr_framereg.h"
static struct dentry *hsr_debugfs_root_dir;
/* hsr_node_table_show - Formats and prints node_table entries */
static int
hsr_node_table_show(struct seq_file *sfp, void *data)
{
struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
struct hsr_node *node;
int i;
seq_printf(sfp, "Node Table entries for (%s) device\n",
(priv->prot_version == PRP_V1 ? "PRP" : "HSR"));
seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], ");
seq_puts(sfp, "time_in[B], Address-B port, ");
if (priv->prot_version == PRP_V1)
seq_puts(sfp, "SAN-A, SAN-B, DAN-P\n");
else
seq_puts(sfp, "DAN-H\n");
rcu_read_lock();
for (i = 0 ; i < priv->hash_buckets; i++) {
hlist_for_each_entry_rcu(node, &priv->node_db[i], mac_list) {
/* skip self node */
if (hsr_addr_is_self(priv, node->macaddress_A))
continue;
seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
seq_printf(sfp, "%10lx, ",
node->time_in[HSR_PT_SLAVE_A]);
seq_printf(sfp, "%10lx, ",
node->time_in[HSR_PT_SLAVE_B]);
seq_printf(sfp, "%14x, ", node->addr_B_port);
if (priv->prot_version == PRP_V1)
seq_printf(sfp, "%5x, %5x, %5x\n",
node->san_a, node->san_b,
(node->san_a == 0 &&
node->san_b == 0));
else
seq_printf(sfp, "%5x\n", 1);
}
}
rcu_read_unlock();
return 0;
}
DEFINE_SHOW_ATTRIBUTE(hsr_node_table);
void hsr_debugfs_rename(struct net_device *dev)
{
struct hsr_priv *priv = netdev_priv(dev);
struct dentry *d;
d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root,
hsr_debugfs_root_dir, dev->name);
if (IS_ERR(d))
netdev_warn(dev, "failed to rename\n");
else
priv->node_tbl_root = d;
}
/* hsr_debugfs_init - create hsr node_table file for dumping
* the node table
*
* Description:
* When debugfs is configured this routine sets up the node_table file per
* hsr device for dumping the node_table entries
*/
void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
{
struct dentry *de = NULL;
de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir);
if (IS_ERR(de)) {
pr_err("Cannot create hsr debugfs directory\n");
return;
}
priv->node_tbl_root = de;
de = debugfs_create_file("node_table", S_IFREG | 0444,
priv->node_tbl_root, priv,
&hsr_node_table_fops);
if (IS_ERR(de)) {
pr_err("Cannot create hsr node_table file\n");
debugfs_remove(priv->node_tbl_root);
priv->node_tbl_root = NULL;
return;
}
}
/* hsr_debugfs_term - Tear down debugfs intrastructure
*
* Description:
* When Debugfs is configured this routine removes debugfs file system
* elements that are specific to hsr
*/
void
hsr_debugfs_term(struct hsr_priv *priv)
{
debugfs_remove_recursive(priv->node_tbl_root);
priv->node_tbl_root = NULL;
}
void hsr_debugfs_create_root(void)
{
hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL);
if (IS_ERR(hsr_debugfs_root_dir)) {
pr_err("Cannot create hsr debugfs root directory\n");
hsr_debugfs_root_dir = NULL;
}
}
void hsr_debugfs_remove_root(void)
{
/* debugfs_remove() internally checks NULL and ERROR */
debugfs_remove(hsr_debugfs_root_dir);
}
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