1/*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/kernel.h>
34#include <linux/ethtool.h>
35#include <linux/netdevice.h>
36
37#include "ipoib.h"
38
39struct ipoib_stats {
40 char stat_string[ETH_GSTRING_LEN];
41 int stat_offset;
42};
43
44#define IPOIB_NETDEV_STAT(m) { \
45 .stat_string = #m, \
46 .stat_offset = offsetof(struct rtnl_link_stats64, m) }
47
48static const struct ipoib_stats ipoib_gstrings_stats[] = {
49 IPOIB_NETDEV_STAT(rx_packets),
50 IPOIB_NETDEV_STAT(tx_packets),
51 IPOIB_NETDEV_STAT(rx_bytes),
52 IPOIB_NETDEV_STAT(tx_bytes),
53 IPOIB_NETDEV_STAT(tx_errors),
54 IPOIB_NETDEV_STAT(rx_dropped),
55 IPOIB_NETDEV_STAT(tx_dropped),
56 IPOIB_NETDEV_STAT(multicast),
57};
58
59#define IPOIB_GLOBAL_STATS_LEN ARRAY_SIZE(ipoib_gstrings_stats)
60
61static void ipoib_get_drvinfo(struct net_device *netdev,
62 struct ethtool_drvinfo *drvinfo)
63{
64 struct ipoib_dev_priv *priv = ipoib_priv(dev: netdev);
65
66 ib_get_device_fw_str(device: priv->ca, str: drvinfo->fw_version);
67
68 strscpy(drvinfo->bus_info, dev_name(priv->ca->dev.parent),
69 sizeof(drvinfo->bus_info));
70
71 strscpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
72}
73
74static int ipoib_get_coalesce(struct net_device *dev,
75 struct ethtool_coalesce *coal,
76 struct kernel_ethtool_coalesce *kernel_coal,
77 struct netlink_ext_ack *extack)
78{
79 struct ipoib_dev_priv *priv = ipoib_priv(dev);
80
81 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
82 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
83
84 return 0;
85}
86
87static int ipoib_set_coalesce(struct net_device *dev,
88 struct ethtool_coalesce *coal,
89 struct kernel_ethtool_coalesce *kernel_coal,
90 struct netlink_ext_ack *extack)
91{
92 struct ipoib_dev_priv *priv = ipoib_priv(dev);
93 int ret;
94
95 /*
96 * These values are saved in the private data and returned
97 * when ipoib_get_coalesce() is called
98 */
99 if (coal->rx_coalesce_usecs > 0xffff ||
100 coal->rx_max_coalesced_frames > 0xffff)
101 return -EINVAL;
102
103 ret = rdma_set_cq_moderation(cq: priv->recv_cq,
104 cq_count: coal->rx_max_coalesced_frames,
105 cq_period: coal->rx_coalesce_usecs);
106 if (ret && ret != -EOPNOTSUPP) {
107 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
108 return ret;
109 }
110
111 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
112 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
113
114 return 0;
115}
116static void ipoib_get_ethtool_stats(struct net_device *dev,
117 struct ethtool_stats __always_unused *stats,
118 u64 *data)
119{
120 int i;
121 struct net_device_stats *net_stats = &dev->stats;
122 u8 *p = (u8 *)net_stats;
123
124 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
125 data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
126
127}
128static void ipoib_get_strings(struct net_device __always_unused *dev,
129 u32 stringset, u8 *data)
130{
131 u8 *p = data;
132 int i;
133
134 switch (stringset) {
135 case ETH_SS_STATS:
136 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
137 memcpy(p, ipoib_gstrings_stats[i].stat_string,
138 ETH_GSTRING_LEN);
139 p += ETH_GSTRING_LEN;
140 }
141 break;
142 default:
143 break;
144 }
145}
146static int ipoib_get_sset_count(struct net_device __always_unused *dev,
147 int sset)
148{
149 switch (sset) {
150 case ETH_SS_STATS:
151 return IPOIB_GLOBAL_STATS_LEN;
152 default:
153 break;
154 }
155 return -EOPNOTSUPP;
156}
157
158/* Return lane speed in unit of 1e6 bit/sec */
159static inline int ib_speed_enum_to_int(int speed)
160{
161 switch (speed) {
162 case IB_SPEED_SDR:
163 return SPEED_2500;
164 case IB_SPEED_DDR:
165 return SPEED_5000;
166 case IB_SPEED_QDR:
167 case IB_SPEED_FDR10:
168 return SPEED_10000;
169 case IB_SPEED_FDR:
170 return SPEED_14000;
171 case IB_SPEED_EDR:
172 return SPEED_25000;
173 case IB_SPEED_HDR:
174 return SPEED_50000;
175 case IB_SPEED_NDR:
176 return SPEED_100000;
177 case IB_SPEED_XDR:
178 return SPEED_200000;
179 }
180
181 return SPEED_UNKNOWN;
182}
183
184static int ipoib_get_link_ksettings(struct net_device *netdev,
185 struct ethtool_link_ksettings *cmd)
186{
187 struct ipoib_dev_priv *priv = ipoib_priv(dev: netdev);
188 struct ib_port_attr attr;
189 int ret, speed, width;
190
191 if (!netif_carrier_ok(dev: netdev)) {
192 cmd->base.speed = SPEED_UNKNOWN;
193 cmd->base.duplex = DUPLEX_UNKNOWN;
194 return 0;
195 }
196
197 ret = ib_query_port(device: priv->ca, port_num: priv->port, port_attr: &attr);
198 if (ret < 0)
199 return -EINVAL;
200
201 speed = ib_speed_enum_to_int(speed: attr.active_speed);
202 width = ib_width_enum_to_int(width: attr.active_width);
203
204 if (speed < 0 || width < 0)
205 return -EINVAL;
206
207 /* Except the following are set, the other members of
208 * the struct ethtool_link_settings are initialized to
209 * zero in the function __ethtool_get_link_ksettings.
210 */
211 cmd->base.speed = speed * width;
212 cmd->base.duplex = DUPLEX_FULL;
213
214 cmd->base.phy_address = 0xFF;
215
216 cmd->base.autoneg = AUTONEG_ENABLE;
217 cmd->base.port = PORT_OTHER;
218
219 return 0;
220}
221
222static const struct ethtool_ops ipoib_ethtool_ops = {
223 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
224 ETHTOOL_COALESCE_RX_MAX_FRAMES,
225 .get_link_ksettings = ipoib_get_link_ksettings,
226 .get_drvinfo = ipoib_get_drvinfo,
227 .get_coalesce = ipoib_get_coalesce,
228 .set_coalesce = ipoib_set_coalesce,
229 .get_strings = ipoib_get_strings,
230 .get_ethtool_stats = ipoib_get_ethtool_stats,
231 .get_sset_count = ipoib_get_sset_count,
232 .get_link = ethtool_op_get_link,
233};
234
235void ipoib_set_ethtool_ops(struct net_device *dev)
236{
237 dev->ethtool_ops = &ipoib_ethtool_ops;
238}
239

source code of linux/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c