ipoib_ethtool.c

  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	int i;
132
133	switch (stringset) {
134	case ETH_SS_STATS:
135		for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
136			ethtool_puts(&data,
137				     ipoib_gstrings_stats[i].stat_string);
138		break;
139	default:
140		break;
141	}
142}
143static int ipoib_get_sset_count(struct net_device __always_unused *dev,
144				 int sset)
145{
146	switch (sset) {
147	case ETH_SS_STATS:
148		return IPOIB_GLOBAL_STATS_LEN;
149	default:
150		break;
151	}
152	return -EOPNOTSUPP;
153}
154
155/* Return lane speed in unit of 1e6 bit/sec */
156static inline int ib_speed_enum_to_int(int speed)
157{
158	switch (speed) {
159	case IB_SPEED_SDR:
160		return SPEED_2500;
161	case IB_SPEED_DDR:
162		return SPEED_5000;
163	case IB_SPEED_QDR:
164	case IB_SPEED_FDR10:
165		return SPEED_10000;
166	case IB_SPEED_FDR:
167		return SPEED_14000;
168	case IB_SPEED_EDR:
169		return SPEED_25000;
170	case IB_SPEED_HDR:
171		return SPEED_50000;
172	case IB_SPEED_NDR:
173		return SPEED_100000;
174	case IB_SPEED_XDR:
175		return SPEED_200000;
176	}
177
178	return SPEED_UNKNOWN;
179}
180
181static int ipoib_get_link_ksettings(struct net_device *netdev,
182				    struct ethtool_link_ksettings *cmd)
183{
184	struct ipoib_dev_priv *priv = ipoib_priv(netdev);
185	struct ib_port_attr attr;
186	int ret, speed, width;
187
188	if (!netif_carrier_ok(netdev)) {
189		cmd->base.speed = SPEED_UNKNOWN;
190		cmd->base.duplex = DUPLEX_UNKNOWN;
191		return 0;
192	}
193
194	ret = ib_query_port(priv->ca, priv->port, &attr);
195	if (ret < 0)
196		return -EINVAL;
197
198	speed = ib_speed_enum_to_int(attr.active_speed);
199	width = ib_width_enum_to_int(attr.active_width);
200
201	if (speed < 0 || width < 0)
202		return -EINVAL;
203
204	/* Except the following are set, the other members of
205	 * the struct ethtool_link_settings are initialized to
206	 * zero in the function __ethtool_get_link_ksettings.
207	 */
208	cmd->base.speed		 = speed * width;
209	cmd->base.duplex	 = DUPLEX_FULL;
210
211	cmd->base.phy_address	 = 0xFF;
212
213	cmd->base.autoneg	 = AUTONEG_ENABLE;
214	cmd->base.port		 = PORT_OTHER;
215
216	return 0;
217}
218
219static const struct ethtool_ops ipoib_ethtool_ops = {
220	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
221				     ETHTOOL_COALESCE_RX_MAX_FRAMES,
222	.get_link_ksettings	= ipoib_get_link_ksettings,
223	.get_drvinfo		= ipoib_get_drvinfo,
224	.get_coalesce		= ipoib_get_coalesce,
225	.set_coalesce		= ipoib_set_coalesce,
226	.get_strings		= ipoib_get_strings,
227	.get_ethtool_stats	= ipoib_get_ethtool_stats,
228	.get_sset_count		= ipoib_get_sset_count,
229	.get_link		= ethtool_op_get_link,
230};
231
232void ipoib_set_ethtool_ops(struct net_device *dev)
233{
234	dev->ethtool_ops = &ipoib_ethtool_ops;
235}