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 };
57 
58 #define IPOIB_GLOBAL_STATS_LEN	ARRAY_SIZE(ipoib_gstrings_stats)
59 
60 static void ipoib_get_drvinfo(struct net_device *netdev,
61 			      struct ethtool_drvinfo *drvinfo)
62 {
63 	struct ipoib_dev_priv *priv = ipoib_priv(netdev);
64 
65 	ib_get_device_fw_str(priv->ca, drvinfo->fw_version,
66 			     sizeof(drvinfo->fw_version));
67 
68 	strlcpy(drvinfo->bus_info, dev_name(priv->ca->dev.parent),
69 		sizeof(drvinfo->bus_info));
70 
71 	strlcpy(drvinfo->version, ipoib_driver_version,
72 		sizeof(drvinfo->version));
73 
74 	strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
75 }
76 
77 static int ipoib_get_coalesce(struct net_device *dev,
78 			      struct ethtool_coalesce *coal)
79 {
80 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
81 
82 	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
83 	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
84 
85 	return 0;
86 }
87 
88 static int ipoib_set_coalesce(struct net_device *dev,
89 			      struct ethtool_coalesce *coal)
90 {
91 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
92 	int ret;
93 
94 	/*
95 	 * These values are saved in the private data and returned
96 	 * when ipoib_get_coalesce() is called
97 	 */
98 	if (coal->rx_coalesce_usecs       > 0xffff ||
99 	    coal->rx_max_coalesced_frames > 0xffff)
100 		return -EINVAL;
101 
102 	ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
103 			   coal->rx_coalesce_usecs);
104 	if (ret && ret != -ENOSYS) {
105 		ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
106 		return ret;
107 	}
108 
109 	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
110 	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
111 
112 	return 0;
113 }
114 static void ipoib_get_ethtool_stats(struct net_device *dev,
115 				    struct ethtool_stats __always_unused *stats,
116 				    u64 *data)
117 {
118 	int i;
119 	struct net_device_stats *net_stats = &dev->stats;
120 	u8 *p = (u8 *)net_stats;
121 
122 	for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
123 		data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
124 
125 }
126 static void ipoib_get_strings(struct net_device __always_unused *dev,
127 			      u32 stringset, u8 *data)
128 {
129 	u8 *p = data;
130 	int i;
131 
132 	switch (stringset) {
133 	case ETH_SS_STATS:
134 		for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
135 			memcpy(p, ipoib_gstrings_stats[i].stat_string,
136 				ETH_GSTRING_LEN);
137 			p += ETH_GSTRING_LEN;
138 		}
139 		break;
140 	case ETH_SS_TEST:
141 	default:
142 		break;
143 	}
144 }
145 static int ipoib_get_sset_count(struct net_device __always_unused *dev,
146 				 int sset)
147 {
148 	switch (sset) {
149 	case ETH_SS_STATS:
150 		return IPOIB_GLOBAL_STATS_LEN;
151 	case ETH_SS_TEST:
152 	default:
153 		break;
154 	}
155 	return -EOPNOTSUPP;
156 }
157 
158 /* Return lane speed in unit of 1e6 bit/sec */
159 static 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 	}
174 
175 	return SPEED_UNKNOWN;
176 }
177 
178 static int ipoib_get_link_ksettings(struct net_device *netdev,
179 				    struct ethtool_link_ksettings *cmd)
180 {
181 	struct ipoib_dev_priv *priv = ipoib_priv(netdev);
182 	struct ib_port_attr attr;
183 	int ret, speed, width;
184 
185 	if (!netif_carrier_ok(netdev)) {
186 		cmd->base.speed = SPEED_UNKNOWN;
187 		cmd->base.duplex = DUPLEX_UNKNOWN;
188 		return 0;
189 	}
190 
191 	ret = ib_query_port(priv->ca, priv->port, &attr);
192 	if (ret < 0)
193 		return -EINVAL;
194 
195 	speed = ib_speed_enum_to_int(attr.active_speed);
196 	width = ib_width_enum_to_int(attr.active_width);
197 
198 	if (speed < 0 || width < 0)
199 		return -EINVAL;
200 
201 	/* Except the following are set, the other members of
202 	 * the struct ethtool_link_settings are initialized to
203 	 * zero in the function __ethtool_get_link_ksettings.
204 	 */
205 	cmd->base.speed		 = speed * width;
206 	cmd->base.duplex	 = DUPLEX_FULL;
207 
208 	cmd->base.phy_address	 = 0xFF;
209 
210 	cmd->base.autoneg	 = AUTONEG_ENABLE;
211 	cmd->base.port		 = PORT_OTHER;
212 
213 	return 0;
214 }
215 
216 static const struct ethtool_ops ipoib_ethtool_ops = {
217 	.get_link_ksettings	= ipoib_get_link_ksettings,
218 	.get_drvinfo		= ipoib_get_drvinfo,
219 	.get_coalesce		= ipoib_get_coalesce,
220 	.set_coalesce		= ipoib_set_coalesce,
221 	.get_strings		= ipoib_get_strings,
222 	.get_ethtool_stats	= ipoib_get_ethtool_stats,
223 	.get_sset_count		= ipoib_get_sset_count,
224 };
225 
226 void ipoib_set_ethtool_ops(struct net_device *dev)
227 {
228 	dev->ethtool_ops = &ipoib_ethtool_ops;
229 }
230