1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright (c) 2021, Microsoft Corporation. */
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include "mana.h"
static const struct {
char name[ETH_GSTRING_LEN];
u16 offset;
} mana_eth_stats[] = {
{"stop_queue", offsetof(struct mana_ethtool_stats, stop_queue)},
{"wake_queue", offsetof(struct mana_ethtool_stats, wake_queue)},
};
static int mana_get_sset_count(struct net_device *ndev, int stringset)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
if (stringset != ETH_SS_STATS)
return -EINVAL;
return ARRAY_SIZE(mana_eth_stats) + num_queues * 4;
}
static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
u8 *p = data;
int i;
if (stringset != ETH_SS_STATS)
return;
for (i = 0; i < ARRAY_SIZE(mana_eth_stats); i++) {
memcpy(p, mana_eth_stats[i].name, ETH_GSTRING_LEN);
p += ETH_GSTRING_LEN;
}
for (i = 0; i < num_queues; i++) {
sprintf(p, "rx_%d_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "rx_%d_bytes", i);
p += ETH_GSTRING_LEN;
}
for (i = 0; i < num_queues; i++) {
sprintf(p, "tx_%d_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_bytes", i);
p += ETH_GSTRING_LEN;
}
}
static void mana_get_ethtool_stats(struct net_device *ndev,
struct ethtool_stats *e_stats, u64 *data)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
void *eth_stats = &apc->eth_stats;
struct mana_stats *stats;
unsigned int start;
u64 packets, bytes;
int q, i = 0;
if (!apc->port_is_up)
return;
for (q = 0; q < ARRAY_SIZE(mana_eth_stats); q++)
data[i++] = *(u64 *)(eth_stats + mana_eth_stats[q].offset);
for (q = 0; q < num_queues; q++) {
stats = &apc->rxqs[q]->stats;
do {
start = u64_stats_fetch_begin_irq(&stats->syncp);
packets = stats->packets;
bytes = stats->bytes;
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
data[i++] = packets;
data[i++] = bytes;
}
for (q = 0; q < num_queues; q++) {
stats = &apc->tx_qp[q].txq.stats;
do {
start = u64_stats_fetch_begin_irq(&stats->syncp);
packets = stats->packets;
bytes = stats->bytes;
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
data[i++] = packets;
data[i++] = bytes;
}
}
static int mana_get_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *cmd,
u32 *rules)
{
struct mana_port_context *apc = netdev_priv(ndev);
switch (cmd->cmd) {
case ETHTOOL_GRXRINGS:
cmd->data = apc->num_queues;
return 0;
}
return -EOPNOTSUPP;
}
static u32 mana_get_rxfh_key_size(struct net_device *ndev)
{
return MANA_HASH_KEY_SIZE;
}
static u32 mana_rss_indir_size(struct net_device *ndev)
{
return MANA_INDIRECT_TABLE_SIZE;
}
static int mana_get_rxfh(struct net_device *ndev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct mana_port_context *apc = netdev_priv(ndev);
int i;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
if (indir) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
indir[i] = apc->indir_table[i];
}
if (key)
memcpy(key, apc->hashkey, MANA_HASH_KEY_SIZE);
return 0;
}
static int mana_set_rxfh(struct net_device *ndev, const u32 *indir,
const u8 *key, const u8 hfunc)
{
struct mana_port_context *apc = netdev_priv(ndev);
bool update_hash = false, update_table = false;
u32 save_table[MANA_INDIRECT_TABLE_SIZE];
u8 save_key[MANA_HASH_KEY_SIZE];
int i, err;
if (!apc->port_is_up)
return -EOPNOTSUPP;
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
if (indir) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
if (indir[i] >= apc->num_queues)
return -EINVAL;
update_table = true;
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) {
save_table[i] = apc->indir_table[i];
apc->indir_table[i] = indir[i];
}
}
if (key) {
update_hash = true;
memcpy(save_key, apc->hashkey, MANA_HASH_KEY_SIZE);
memcpy(apc->hashkey, key, MANA_HASH_KEY_SIZE);
}
err = mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table);
if (err) { /* recover to original values */
if (update_table) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
apc->indir_table[i] = save_table[i];
}
if (update_hash)
memcpy(apc->hashkey, save_key, MANA_HASH_KEY_SIZE);
mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table);
}
return err;
}
static void mana_get_channels(struct net_device *ndev,
struct ethtool_channels *channel)
{
struct mana_port_context *apc = netdev_priv(ndev);
channel->max_combined = apc->max_queues;
channel->combined_count = apc->num_queues;
}
static int mana_set_channels(struct net_device *ndev,
struct ethtool_channels *channels)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int new_count = channels->combined_count;
unsigned int old_count = apc->num_queues;
int err, err2;
if (!apc->port_is_up)
return -EOPNOTSUPP;
err = mana_detach(ndev, false);
if (err) {
netdev_err(ndev, "mana_detach failed: %d\n", err);
return err;
}
apc->num_queues = new_count;
err = mana_attach(ndev);
if (!err)
return 0;
netdev_err(ndev, "mana_attach failed: %d\n", err);
/* Try to roll it back to the old configuration. */
apc->num_queues = old_count;
err2 = mana_attach(ndev);
if (err2)
netdev_err(ndev, "mana re-attach failed: %d\n", err2);
return err;
}
const struct ethtool_ops mana_ethtool_ops = {
.get_ethtool_stats = mana_get_ethtool_stats,
.get_sset_count = mana_get_sset_count,
.get_strings = mana_get_strings,
.get_rxnfc = mana_get_rxnfc,
.get_rxfh_key_size = mana_get_rxfh_key_size,
.get_rxfh_indir_size = mana_rss_indir_size,
.get_rxfh = mana_get_rxfh,
.set_rxfh = mana_set_rxfh,
.get_channels = mana_get_channels,
.set_channels = mana_set_channels,
};
|
