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(netdev);
65
66	ib_get_device_fw_str(priv->ca, 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(priv->recv_cq,
104				     coal->rx_max_coalesced_frames,
105				     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(netdev);
188	struct ib_port_attr attr;
189	int ret, speed, width;
190
191	if (!netif_carrier_ok(netdev)) {
192		cmd->base.speed = SPEED_UNKNOWN;
193		cmd->base.duplex = DUPLEX_UNKNOWN;
194		return 0;
195	}
196
197	ret = ib_query_port(priv->ca, priv->port, &attr);
198	if (ret < 0)
199		return -EINVAL;
200
201	speed = ib_speed_enum_to_int(attr.active_speed);
202	width = ib_width_enum_to_int(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