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
39 struct 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
48 static 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
ipoib_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)61 static void ipoib_get_drvinfo(struct net_device *netdev,
62 struct ethtool_drvinfo *drvinfo)
63 {
64 struct ipoib_dev_priv *priv = ipoib_priv(netdev);
65
66 ib_get_device_fw_str(priv->ca, drvinfo->fw_version);
67
68 strlcpy(drvinfo->bus_info, dev_name(priv->ca->dev.parent),
69 sizeof(drvinfo->bus_info));
70
71 strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
72 }
73
ipoib_get_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)74 static int ipoib_get_coalesce(struct net_device *dev,
75 struct ethtool_coalesce *coal)
76 {
77 struct ipoib_dev_priv *priv = ipoib_priv(dev);
78
79 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
80 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
81
82 return 0;
83 }
84
ipoib_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)85 static int ipoib_set_coalesce(struct net_device *dev,
86 struct ethtool_coalesce *coal)
87 {
88 struct ipoib_dev_priv *priv = ipoib_priv(dev);
89 int ret;
90
91 /*
92 * These values are saved in the private data and returned
93 * when ipoib_get_coalesce() is called
94 */
95 if (coal->rx_coalesce_usecs > 0xffff ||
96 coal->rx_max_coalesced_frames > 0xffff)
97 return -EINVAL;
98
99 ret = rdma_set_cq_moderation(priv->recv_cq,
100 coal->rx_max_coalesced_frames,
101 coal->rx_coalesce_usecs);
102 if (ret && ret != -EOPNOTSUPP) {
103 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
104 return ret;
105 }
106
107 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
108 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
109
110 return 0;
111 }
ipoib_get_ethtool_stats(struct net_device * dev,struct ethtool_stats __always_unused * stats,u64 * data)112 static void ipoib_get_ethtool_stats(struct net_device *dev,
113 struct ethtool_stats __always_unused *stats,
114 u64 *data)
115 {
116 int i;
117 struct net_device_stats *net_stats = &dev->stats;
118 u8 *p = (u8 *)net_stats;
119
120 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
121 data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
122
123 }
ipoib_get_strings(struct net_device __always_unused * dev,u32 stringset,u8 * data)124 static void ipoib_get_strings(struct net_device __always_unused *dev,
125 u32 stringset, u8 *data)
126 {
127 u8 *p = data;
128 int i;
129
130 switch (stringset) {
131 case ETH_SS_STATS:
132 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
133 memcpy(p, ipoib_gstrings_stats[i].stat_string,
134 ETH_GSTRING_LEN);
135 p += ETH_GSTRING_LEN;
136 }
137 break;
138 default:
139 break;
140 }
141 }
ipoib_get_sset_count(struct net_device __always_unused * dev,int sset)142 static int ipoib_get_sset_count(struct net_device __always_unused *dev,
143 int sset)
144 {
145 switch (sset) {
146 case ETH_SS_STATS:
147 return IPOIB_GLOBAL_STATS_LEN;
148 default:
149 break;
150 }
151 return -EOPNOTSUPP;
152 }
153
154 /* Return lane speed in unit of 1e6 bit/sec */
ib_speed_enum_to_int(int speed)155 static inline int ib_speed_enum_to_int(int speed)
156 {
157 switch (speed) {
158 case IB_SPEED_SDR:
159 return SPEED_2500;
160 case IB_SPEED_DDR:
161 return SPEED_5000;
162 case IB_SPEED_QDR:
163 case IB_SPEED_FDR10:
164 return SPEED_10000;
165 case IB_SPEED_FDR:
166 return SPEED_14000;
167 case IB_SPEED_EDR:
168 return SPEED_25000;
169 }
170
171 return SPEED_UNKNOWN;
172 }
173
ipoib_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)174 static int ipoib_get_link_ksettings(struct net_device *netdev,
175 struct ethtool_link_ksettings *cmd)
176 {
177 struct ipoib_dev_priv *priv = ipoib_priv(netdev);
178 struct ib_port_attr attr;
179 int ret, speed, width;
180
181 if (!netif_carrier_ok(netdev)) {
182 cmd->base.speed = SPEED_UNKNOWN;
183 cmd->base.duplex = DUPLEX_UNKNOWN;
184 return 0;
185 }
186
187 ret = ib_query_port(priv->ca, priv->port, &attr);
188 if (ret < 0)
189 return -EINVAL;
190
191 speed = ib_speed_enum_to_int(attr.active_speed);
192 width = ib_width_enum_to_int(attr.active_width);
193
194 if (speed < 0 || width < 0)
195 return -EINVAL;
196
197 /* Except the following are set, the other members of
198 * the struct ethtool_link_settings are initialized to
199 * zero in the function __ethtool_get_link_ksettings.
200 */
201 cmd->base.speed = speed * width;
202 cmd->base.duplex = DUPLEX_FULL;
203
204 cmd->base.phy_address = 0xFF;
205
206 cmd->base.autoneg = AUTONEG_ENABLE;
207 cmd->base.port = PORT_OTHER;
208
209 return 0;
210 }
211
212 static const struct ethtool_ops ipoib_ethtool_ops = {
213 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
214 ETHTOOL_COALESCE_RX_MAX_FRAMES,
215 .get_link_ksettings = ipoib_get_link_ksettings,
216 .get_drvinfo = ipoib_get_drvinfo,
217 .get_coalesce = ipoib_get_coalesce,
218 .set_coalesce = ipoib_set_coalesce,
219 .get_strings = ipoib_get_strings,
220 .get_ethtool_stats = ipoib_get_ethtool_stats,
221 .get_sset_count = ipoib_get_sset_count,
222 .get_link = ethtool_op_get_link,
223 };
224
ipoib_set_ethtool_ops(struct net_device * dev)225 void ipoib_set_ethtool_ops(struct net_device *dev)
226 {
227 dev->ethtool_ops = &ipoib_ethtool_ops;
228 }
229