summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/google/gve/gve_ethtool.c
blob: 26540b8565410d558050177bec051305a4cc6891 (plain)
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
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Google virtual Ethernet (gve) driver
 *
 * Copyright (C) 2015-2019 Google, Inc.
 */

#include <linux/rtnetlink.h>
#include "gve.h"

static void gve_get_drvinfo(struct net_device *netdev,
			    struct ethtool_drvinfo *info)
{
	struct gve_priv *priv = netdev_priv(netdev);

	strlcpy(info->driver, "gve", sizeof(info->driver));
	strlcpy(info->version, gve_version_str, sizeof(info->version));
	strlcpy(info->bus_info, pci_name(priv->pdev), sizeof(info->bus_info));
}

static void gve_set_msglevel(struct net_device *netdev, u32 value)
{
	struct gve_priv *priv = netdev_priv(netdev);

	priv->msg_enable = value;
}

static u32 gve_get_msglevel(struct net_device *netdev)
{
	struct gve_priv *priv = netdev_priv(netdev);

	return priv->msg_enable;
}

static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = {
	"rx_packets", "tx_packets", "rx_bytes", "tx_bytes",
	"rx_dropped", "tx_dropped", "tx_timeouts",
};

#define GVE_MAIN_STATS_LEN  ARRAY_SIZE(gve_gstrings_main_stats)
#define NUM_GVE_TX_CNTS	5
#define NUM_GVE_RX_CNTS	2

static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
{
	struct gve_priv *priv = netdev_priv(netdev);
	char *s = (char *)data;
	int i;

	if (stringset != ETH_SS_STATS)
		return;

	memcpy(s, *gve_gstrings_main_stats,
	       sizeof(gve_gstrings_main_stats));
	s += sizeof(gve_gstrings_main_stats);
	for (i = 0; i < priv->rx_cfg.num_queues; i++) {
		snprintf(s, ETH_GSTRING_LEN, "rx_desc_cnt[%u]", i);
		s += ETH_GSTRING_LEN;
		snprintf(s, ETH_GSTRING_LEN, "rx_desc_fill_cnt[%u]", i);
		s += ETH_GSTRING_LEN;
	}
	for (i = 0; i < priv->tx_cfg.num_queues; i++) {
		snprintf(s, ETH_GSTRING_LEN, "tx_req[%u]", i);
		s += ETH_GSTRING_LEN;
		snprintf(s, ETH_GSTRING_LEN, "tx_done[%u]", i);
		s += ETH_GSTRING_LEN;
		snprintf(s, ETH_GSTRING_LEN, "tx_wake[%u]", i);
		s += ETH_GSTRING_LEN;
		snprintf(s, ETH_GSTRING_LEN, "tx_stop[%u]", i);
		s += ETH_GSTRING_LEN;
		snprintf(s, ETH_GSTRING_LEN, "tx_event_counter[%u]", i);
		s += ETH_GSTRING_LEN;
	}
}

static int gve_get_sset_count(struct net_device *netdev, int sset)
{
	struct gve_priv *priv = netdev_priv(netdev);

	switch (sset) {
	case ETH_SS_STATS:
		return GVE_MAIN_STATS_LEN +
		       (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) +
		       (priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS);
	default:
		return -EOPNOTSUPP;
	}
}

static void
gve_get_ethtool_stats(struct net_device *netdev,
		      struct ethtool_stats *stats, u64 *data)
{
	struct gve_priv *priv = netdev_priv(netdev);
	u64 rx_pkts, rx_bytes, tx_pkts, tx_bytes;
	unsigned int start;
	int ring;
	int i;

	ASSERT_RTNL();

	for (rx_pkts = 0, rx_bytes = 0, ring = 0;
	     ring < priv->rx_cfg.num_queues; ring++) {
		if (priv->rx) {
			do {
				start =
				  u64_stats_fetch_begin(&priv->rx[ring].statss);
				rx_pkts += priv->rx[ring].rpackets;
				rx_bytes += priv->rx[ring].rbytes;
			} while (u64_stats_fetch_retry(&priv->rx[ring].statss,
						       start));
		}
	}
	for (tx_pkts = 0, tx_bytes = 0, ring = 0;
	     ring < priv->tx_cfg.num_queues; ring++) {
		if (priv->tx) {
			do {
				start =
				  u64_stats_fetch_begin(&priv->tx[ring].statss);
				tx_pkts += priv->tx[ring].pkt_done;
				tx_bytes += priv->tx[ring].bytes_done;
			} while (u64_stats_fetch_retry(&priv->tx[ring].statss,
						       start));
		}
	}

	i = 0;
	data[i++] = rx_pkts;
	data[i++] = tx_pkts;
	data[i++] = rx_bytes;
	data[i++] = tx_bytes;
	/* Skip rx_dropped and tx_dropped */
	i += 2;
	data[i++] = priv->tx_timeo_cnt;
	i = GVE_MAIN_STATS_LEN;

	/* walk RX rings */
	if (priv->rx) {
		for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
			struct gve_rx_ring *rx = &priv->rx[ring];

			data[i++] = rx->desc.cnt;
			data[i++] = rx->desc.fill_cnt;
		}
	} else {
		i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
	}
	/* walk TX rings */
	if (priv->tx) {
		for (ring = 0; ring < priv->tx_cfg.num_queues; ring++) {
			struct gve_tx_ring *tx = &priv->tx[ring];

			data[i++] = tx->req;
			data[i++] = tx->done;
			data[i++] = tx->wake_queue;
			data[i++] = tx->stop_queue;
			data[i++] = be32_to_cpu(gve_tx_load_event_counter(priv,
									  tx));
		}
	} else {
		i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS;
	}
}

static void gve_get_channels(struct net_device *netdev,
			     struct ethtool_channels *cmd)
{
	struct gve_priv *priv = netdev_priv(netdev);

	cmd->max_rx = priv->rx_cfg.max_queues;
	cmd->max_tx = priv->tx_cfg.max_queues;
	cmd->max_other = 0;
	cmd->max_combined = 0;
	cmd->rx_count = priv->rx_cfg.num_queues;
	cmd->tx_count = priv->tx_cfg.num_queues;
	cmd->other_count = 0;
	cmd->combined_count = 0;
}

static int gve_set_channels(struct net_device *netdev,
			    struct ethtool_channels *cmd)
{
	struct gve_priv *priv = netdev_priv(netdev);
	struct gve_queue_config new_tx_cfg = priv->tx_cfg;
	struct gve_queue_config new_rx_cfg = priv->rx_cfg;
	struct ethtool_channels old_settings;
	int new_tx = cmd->tx_count;
	int new_rx = cmd->rx_count;

	gve_get_channels(netdev, &old_settings);

	/* Changing combined is not allowed allowed */
	if (cmd->combined_count != old_settings.combined_count)
		return -EINVAL;

	if (!new_rx || !new_tx)
		return -EINVAL;

	if (!netif_carrier_ok(netdev)) {
		priv->tx_cfg.num_queues = new_tx;
		priv->rx_cfg.num_queues = new_rx;
		return 0;
	}

	new_tx_cfg.num_queues = new_tx;
	new_rx_cfg.num_queues = new_rx;

	return gve_adjust_queues(priv, new_rx_cfg, new_tx_cfg);
}

static void gve_get_ringparam(struct net_device *netdev,
			      struct ethtool_ringparam *cmd)
{
	struct gve_priv *priv = netdev_priv(netdev);

	cmd->rx_max_pending = priv->rx_desc_cnt;
	cmd->tx_max_pending = priv->tx_desc_cnt;
	cmd->rx_pending = priv->rx_desc_cnt;
	cmd->tx_pending = priv->tx_desc_cnt;
}

static int gve_user_reset(struct net_device *netdev, u32 *flags)
{
	struct gve_priv *priv = netdev_priv(netdev);

	if (*flags == ETH_RESET_ALL) {
		*flags = 0;
		return gve_reset(priv, true);
	}

	return -EOPNOTSUPP;
}

const struct ethtool_ops gve_ethtool_ops = {
	.get_drvinfo = gve_get_drvinfo,
	.get_strings = gve_get_strings,
	.get_sset_count = gve_get_sset_count,
	.get_ethtool_stats = gve_get_ethtool_stats,
	.set_msglevel = gve_set_msglevel,
	.get_msglevel = gve_get_msglevel,
	.set_channels = gve_set_channels,
	.get_channels = gve_get_channels,
	.get_link = ethtool_op_get_link,
	.get_ringparam = gve_get_ringparam,
	.reset = gve_user_reset,
};