1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (c) 2020 Facebook
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <linux/debugfs.h>
5*4882a593Smuzhiyun #include <linux/ethtool.h>
6*4882a593Smuzhiyun #include <linux/random.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include "netdevsim.h"
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun static void
nsim_get_pause_stats(struct net_device * dev,struct ethtool_pause_stats * pause_stats)11*4882a593Smuzhiyun nsim_get_pause_stats(struct net_device *dev,
12*4882a593Smuzhiyun struct ethtool_pause_stats *pause_stats)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun struct netdevsim *ns = netdev_priv(dev);
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun if (ns->ethtool.report_stats_rx)
17*4882a593Smuzhiyun pause_stats->rx_pause_frames = 1;
18*4882a593Smuzhiyun if (ns->ethtool.report_stats_tx)
19*4882a593Smuzhiyun pause_stats->tx_pause_frames = 2;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static void
nsim_get_pauseparam(struct net_device * dev,struct ethtool_pauseparam * pause)23*4882a593Smuzhiyun nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun struct netdevsim *ns = netdev_priv(dev);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun pause->autoneg = 0; /* We don't support ksettings, so can't pretend */
28*4882a593Smuzhiyun pause->rx_pause = ns->ethtool.rx;
29*4882a593Smuzhiyun pause->tx_pause = ns->ethtool.tx;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun static int
nsim_set_pauseparam(struct net_device * dev,struct ethtool_pauseparam * pause)33*4882a593Smuzhiyun nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct netdevsim *ns = netdev_priv(dev);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun if (pause->autoneg)
38*4882a593Smuzhiyun return -EINVAL;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun ns->ethtool.rx = pause->rx_pause;
41*4882a593Smuzhiyun ns->ethtool.tx = pause->tx_pause;
42*4882a593Smuzhiyun return 0;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun static const struct ethtool_ops nsim_ethtool_ops = {
46*4882a593Smuzhiyun .get_pause_stats = nsim_get_pause_stats,
47*4882a593Smuzhiyun .get_pauseparam = nsim_get_pauseparam,
48*4882a593Smuzhiyun .set_pauseparam = nsim_set_pauseparam,
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
nsim_ethtool_init(struct netdevsim * ns)51*4882a593Smuzhiyun void nsim_ethtool_init(struct netdevsim *ns)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun struct dentry *ethtool, *dir;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun ns->netdev->ethtool_ops = &nsim_ethtool_ops;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun dir = debugfs_create_dir("pause", ethtool);
60*4882a593Smuzhiyun debugfs_create_bool("report_stats_rx", 0600, dir,
61*4882a593Smuzhiyun &ns->ethtool.report_stats_rx);
62*4882a593Smuzhiyun debugfs_create_bool("report_stats_tx", 0600, dir,
63*4882a593Smuzhiyun &ns->ethtool.report_stats_tx);
64*4882a593Smuzhiyun }
65