1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2020 Facebook
3
4#include <linux/debugfs.h>
5#include <linux/ethtool.h>
6#include <linux/random.h>
7
8#include "netdevsim.h"
9
10static void
11nsim_get_pause_stats(struct net_device *dev,
12		     struct ethtool_pause_stats *pause_stats)
13{
14	struct netdevsim *ns = netdev_priv(dev);
15
16	if (ns->ethtool.report_stats_rx)
17		pause_stats->rx_pause_frames = 1;
18	if (ns->ethtool.report_stats_tx)
19		pause_stats->tx_pause_frames = 2;
20}
21
22static void
23nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
24{
25	struct netdevsim *ns = netdev_priv(dev);
26
27	pause->autoneg = 0; /* We don't support ksettings, so can't pretend */
28	pause->rx_pause = ns->ethtool.rx;
29	pause->tx_pause = ns->ethtool.tx;
30}
31
32static int
33nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
34{
35	struct netdevsim *ns = netdev_priv(dev);
36
37	if (pause->autoneg)
38		return -EINVAL;
39
40	ns->ethtool.rx = pause->rx_pause;
41	ns->ethtool.tx = pause->tx_pause;
42	return 0;
43}
44
45static const struct ethtool_ops nsim_ethtool_ops = {
46	.get_pause_stats	= nsim_get_pause_stats,
47	.get_pauseparam		= nsim_get_pauseparam,
48	.set_pauseparam		= nsim_set_pauseparam,
49};
50
51void nsim_ethtool_init(struct netdevsim *ns)
52{
53	struct dentry *ethtool, *dir;
54
55	ns->netdev->ethtool_ops = &nsim_ethtool_ops;
56
57	ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
58
59	dir = debugfs_create_dir("pause", ethtool);
60	debugfs_create_bool("report_stats_rx", 0600, dir,
61			    &ns->ethtool.report_stats_rx);
62	debugfs_create_bool("report_stats_tx", 0600, dir,
63			    &ns->ethtool.report_stats_tx);
64}
65