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/random.h>
6#include <net/netdev_queues.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 kernel_ring->hds_thresh_max = NSIM_HDS_THRESHOLD_MAX;
76
77 if (dev->cfg->hds_config == ETHTOOL_TCP_DATA_SPLIT_UNKNOWN)
78 kernel_ring->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
79}
80
81static int nsim_set_ringparam(struct net_device *dev,
82 struct ethtool_ringparam *ring,
83 struct kernel_ethtool_ringparam *kernel_ring,
84 struct netlink_ext_ack *extack)
85{
86 struct netdevsim *ns = netdev_priv(dev);
87
88 ns->ethtool.ring.rx_pending = ring->rx_pending;
89 ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending;
90 ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending;
91 ns->ethtool.ring.tx_pending = ring->tx_pending;
92 return 0;
93}
94
95static void
96nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
97{
98 struct netdevsim *ns = netdev_priv(dev);
99
100 ch->max_combined = ns->nsim_bus_dev->num_queues;
101 ch->combined_count = ns->ethtool.channels;
102}
103
104static int
105nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
106{
107 struct netdevsim *ns = netdev_priv(dev);
108 int err;
109
110 err = netif_set_real_num_queues(dev, ch->combined_count,
111 ch->combined_count);
112 if (err)
113 return err;
114
115 ns->ethtool.channels = ch->combined_count;
116 return 0;
117}
118
119static int
120nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
121{
122 struct netdevsim *ns = netdev_priv(dev);
123
124 if (ns->ethtool.get_err)
125 return -ns->ethtool.get_err;
126 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));
127 return 0;
128}
129
130static int
131nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
132{
133 struct netdevsim *ns = netdev_priv(dev);
134 u32 fec;
135
136 if (ns->ethtool.set_err)
137 return -ns->ethtool.set_err;
138 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));
139 fec = fecparam->fec;
140 if (fec == ETHTOOL_FEC_AUTO)
141 fec |= ETHTOOL_FEC_OFF;
142 fec |= ETHTOOL_FEC_NONE;
143 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);
144 return 0;
145}
146
147static void
148nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats)
149{
150 fec_stats->corrected_blocks.total = 123;
151 fec_stats->uncorrectable_blocks.total = 4;
152}
153
154static int nsim_get_ts_info(struct net_device *dev,
155 struct kernel_ethtool_ts_info *info)
156{
157 struct netdevsim *ns = netdev_priv(dev);
158
159 info->phc_index = mock_phc_index(ns->phc);
160
161 return 0;
162}
163
164static const struct ethtool_ops nsim_ethtool_ops = {
165 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
166 .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT |
167 ETHTOOL_RING_USE_HDS_THRS,
168 .get_pause_stats = nsim_get_pause_stats,
169 .get_pauseparam = nsim_get_pauseparam,
170 .set_pauseparam = nsim_set_pauseparam,
171 .set_coalesce = nsim_set_coalesce,
172 .get_coalesce = nsim_get_coalesce,
173 .get_ringparam = nsim_get_ringparam,
174 .set_ringparam = nsim_set_ringparam,
175 .get_channels = nsim_get_channels,
176 .set_channels = nsim_set_channels,
177 .get_fecparam = nsim_get_fecparam,
178 .set_fecparam = nsim_set_fecparam,
179 .get_fec_stats = nsim_get_fec_stats,
180 .get_ts_info = nsim_get_ts_info,
181};
182
183static void nsim_ethtool_ring_init(struct netdevsim *ns)
184{
185 ns->ethtool.ring.rx_pending = 512;
186 ns->ethtool.ring.rx_max_pending = 4096;
187 ns->ethtool.ring.rx_jumbo_max_pending = 4096;
188 ns->ethtool.ring.rx_mini_max_pending = 4096;
189 ns->ethtool.ring.tx_pending = 512;
190 ns->ethtool.ring.tx_max_pending = 4096;
191}
192
193void nsim_ethtool_init(struct netdevsim *ns)
194{
195 struct dentry *ethtool, *dir;
196
197 ns->netdev->ethtool_ops = &nsim_ethtool_ops;
198
199 nsim_ethtool_ring_init(ns);
200
201 ns->ethtool.pauseparam.report_stats_rx = true;
202 ns->ethtool.pauseparam.report_stats_tx = true;
203
204 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
205 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
206
207 ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
208
209 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
210
211 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);
212 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);
213
214 dir = debugfs_create_dir("pause", ethtool);
215 debugfs_create_bool("report_stats_rx", 0600, dir,
216 &ns->ethtool.pauseparam.report_stats_rx);
217 debugfs_create_bool("report_stats_tx", 0600, dir,
218 &ns->ethtool.pauseparam.report_stats_tx);
219
220 dir = debugfs_create_dir("ring", ethtool);
221 debugfs_create_u32("rx_max_pending", 0600, dir,
222 &ns->ethtool.ring.rx_max_pending);
223 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
224 &ns->ethtool.ring.rx_jumbo_max_pending);
225 debugfs_create_u32("rx_mini_max_pending", 0600, dir,
226 &ns->ethtool.ring.rx_mini_max_pending);
227 debugfs_create_u32("tx_max_pending", 0600, dir,
228 &ns->ethtool.ring.tx_max_pending);
229}