Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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.pauseparam.report_stats_rx)
17 pause_stats->rx_pause_frames = 1;
18 if (ns->ethtool.pauseparam.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.pauseparam.rx;
29 pause->tx_pause = ns->ethtool.pauseparam.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.pauseparam.rx = pause->rx_pause;
41 ns->ethtool.pauseparam.tx = pause->tx_pause;
42 return 0;
43}
44
45static int nsim_get_coalesce(struct net_device *dev,
46 struct ethtool_coalesce *coal)
47{
48 struct netdevsim *ns = netdev_priv(dev);
49
50 memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));
51 return 0;
52}
53
54static int nsim_set_coalesce(struct net_device *dev,
55 struct ethtool_coalesce *coal)
56{
57 struct netdevsim *ns = netdev_priv(dev);
58
59 memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));
60 return 0;
61}
62
63static void nsim_get_ringparam(struct net_device *dev,
64 struct ethtool_ringparam *ring)
65{
66 struct netdevsim *ns = netdev_priv(dev);
67
68 memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
69}
70
71static int nsim_set_ringparam(struct net_device *dev,
72 struct ethtool_ringparam *ring)
73{
74 struct netdevsim *ns = netdev_priv(dev);
75
76 memcpy(&ns->ethtool.ring, ring, sizeof(ns->ethtool.ring));
77 return 0;
78}
79
80static const struct ethtool_ops nsim_ethtool_ops = {
81 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
82 .get_pause_stats = nsim_get_pause_stats,
83 .get_pauseparam = nsim_get_pauseparam,
84 .set_pauseparam = nsim_set_pauseparam,
85 .set_coalesce = nsim_set_coalesce,
86 .get_coalesce = nsim_get_coalesce,
87 .get_ringparam = nsim_get_ringparam,
88 .set_ringparam = nsim_set_ringparam,
89};
90
91static void nsim_ethtool_ring_init(struct netdevsim *ns)
92{
93 ns->ethtool.ring.rx_max_pending = 4096;
94 ns->ethtool.ring.rx_jumbo_max_pending = 4096;
95 ns->ethtool.ring.rx_mini_max_pending = 4096;
96 ns->ethtool.ring.tx_max_pending = 4096;
97}
98
99void nsim_ethtool_init(struct netdevsim *ns)
100{
101 struct dentry *ethtool, *dir;
102
103 ns->netdev->ethtool_ops = &nsim_ethtool_ops;
104
105 nsim_ethtool_ring_init(ns);
106
107 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
108
109 dir = debugfs_create_dir("pause", ethtool);
110 debugfs_create_bool("report_stats_rx", 0600, dir,
111 &ns->ethtool.pauseparam.report_stats_rx);
112 debugfs_create_bool("report_stats_tx", 0600, dir,
113 &ns->ethtool.pauseparam.report_stats_tx);
114
115 dir = debugfs_create_dir("ring", ethtool);
116 debugfs_create_u32("rx_max_pending", 0600, dir,
117 &ns->ethtool.ring.rx_max_pending);
118 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
119 &ns->ethtool.ring.rx_jumbo_max_pending);
120 debugfs_create_u32("rx_mini_max_pending", 0600, dir,
121 &ns->ethtool.ring.rx_mini_max_pending);
122 debugfs_create_u32("tx_max_pending", 0600, dir,
123 &ns->ethtool.ring.tx_max_pending);
124}