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 struct kernel_ethtool_coalesce *kernel_coal,
48 struct netlink_ext_ack *extack)
49{
50 struct netdevsim *ns = netdev_priv(dev);
51
52 memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));
53 return 0;
54}
55
56static int nsim_set_coalesce(struct net_device *dev,
57 struct ethtool_coalesce *coal,
58 struct kernel_ethtool_coalesce *kernel_coal,
59 struct netlink_ext_ack *extack)
60{
61 struct netdevsim *ns = netdev_priv(dev);
62
63 memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));
64 return 0;
65}
66
67static void nsim_get_ringparam(struct net_device *dev,
68 struct ethtool_ringparam *ring,
69 struct kernel_ethtool_ringparam *kernel_ring,
70 struct netlink_ext_ack *extack)
71{
72 struct netdevsim *ns = netdev_priv(dev);
73
74 memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
75}
76
77static int nsim_set_ringparam(struct net_device *dev,
78 struct ethtool_ringparam *ring,
79 struct kernel_ethtool_ringparam *kernel_ring,
80 struct netlink_ext_ack *extack)
81{
82 struct netdevsim *ns = netdev_priv(dev);
83
84 ns->ethtool.ring.rx_pending = ring->rx_pending;
85 ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending;
86 ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending;
87 ns->ethtool.ring.tx_pending = ring->tx_pending;
88 return 0;
89}
90
91static void
92nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
93{
94 struct netdevsim *ns = netdev_priv(dev);
95
96 ch->max_combined = ns->nsim_bus_dev->num_queues;
97 ch->combined_count = ns->ethtool.channels;
98}
99
100static int
101nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
102{
103 struct netdevsim *ns = netdev_priv(dev);
104 int err;
105
106 err = netif_set_real_num_queues(dev, ch->combined_count,
107 ch->combined_count);
108 if (err)
109 return err;
110
111 ns->ethtool.channels = ch->combined_count;
112 return 0;
113}
114
115static int
116nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
117{
118 struct netdevsim *ns = netdev_priv(dev);
119
120 if (ns->ethtool.get_err)
121 return -ns->ethtool.get_err;
122 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));
123 return 0;
124}
125
126static int
127nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
128{
129 struct netdevsim *ns = netdev_priv(dev);
130 u32 fec;
131
132 if (ns->ethtool.set_err)
133 return -ns->ethtool.set_err;
134 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));
135 fec = fecparam->fec;
136 if (fec == ETHTOOL_FEC_AUTO)
137 fec |= ETHTOOL_FEC_OFF;
138 fec |= ETHTOOL_FEC_NONE;
139 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);
140 return 0;
141}
142
143static void
144nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats)
145{
146 fec_stats->corrected_blocks.total = 123;
147 fec_stats->uncorrectable_blocks.total = 4;
148}
149
150static int nsim_get_ts_info(struct net_device *dev,
151 struct kernel_ethtool_ts_info *info)
152{
153 struct netdevsim *ns = netdev_priv(dev);
154
155 info->phc_index = mock_phc_index(ns->phc);
156
157 return 0;
158}
159
160static const struct ethtool_ops nsim_ethtool_ops = {
161 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
162 .get_pause_stats = nsim_get_pause_stats,
163 .get_pauseparam = nsim_get_pauseparam,
164 .set_pauseparam = nsim_set_pauseparam,
165 .set_coalesce = nsim_set_coalesce,
166 .get_coalesce = nsim_get_coalesce,
167 .get_ringparam = nsim_get_ringparam,
168 .set_ringparam = nsim_set_ringparam,
169 .get_channels = nsim_get_channels,
170 .set_channels = nsim_set_channels,
171 .get_fecparam = nsim_get_fecparam,
172 .set_fecparam = nsim_set_fecparam,
173 .get_fec_stats = nsim_get_fec_stats,
174 .get_ts_info = nsim_get_ts_info,
175};
176
177static void nsim_ethtool_ring_init(struct netdevsim *ns)
178{
179 ns->ethtool.ring.rx_max_pending = 4096;
180 ns->ethtool.ring.rx_jumbo_max_pending = 4096;
181 ns->ethtool.ring.rx_mini_max_pending = 4096;
182 ns->ethtool.ring.tx_max_pending = 4096;
183}
184
185void nsim_ethtool_init(struct netdevsim *ns)
186{
187 struct dentry *ethtool, *dir;
188
189 ns->netdev->ethtool_ops = &nsim_ethtool_ops;
190
191 nsim_ethtool_ring_init(ns);
192
193 ns->ethtool.pauseparam.report_stats_rx = true;
194 ns->ethtool.pauseparam.report_stats_tx = true;
195
196 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
197 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
198
199 ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
200
201 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
202
203 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);
204 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);
205
206 dir = debugfs_create_dir("pause", ethtool);
207 debugfs_create_bool("report_stats_rx", 0600, dir,
208 &ns->ethtool.pauseparam.report_stats_rx);
209 debugfs_create_bool("report_stats_tx", 0600, dir,
210 &ns->ethtool.pauseparam.report_stats_tx);
211
212 dir = debugfs_create_dir("ring", ethtool);
213 debugfs_create_u32("rx_max_pending", 0600, dir,
214 &ns->ethtool.ring.rx_max_pending);
215 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
216 &ns->ethtool.ring.rx_jumbo_max_pending);
217 debugfs_create_u32("rx_mini_max_pending", 0600, dir,
218 &ns->ethtool.ring.rx_mini_max_pending);
219 debugfs_create_u32("tx_max_pending", 0600, dir,
220 &ns->ethtool.ring.tx_max_pending);
221}