GNU Linux-libre 5.10.153-gnu1
[releases.git] / drivers / net / netdevsim / ethtool.c
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
10 static void
11 nsim_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
22 static void
23 nsim_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
32 static int
33 nsim_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
45 static 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
51 void 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 }