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
39static void ipoib_get_drvinfo(struct net_device *netdev,
40			      struct ethtool_drvinfo *drvinfo)
41{
42	strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
43}
44
45static int ipoib_get_coalesce(struct net_device *dev,
46			      struct ethtool_coalesce *coal)
47{
48	struct ipoib_dev_priv *priv = netdev_priv(dev);
49
50	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
51	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
52
53	return 0;
54}
55
56static int ipoib_set_coalesce(struct net_device *dev,
57			      struct ethtool_coalesce *coal)
58{
59	struct ipoib_dev_priv *priv = netdev_priv(dev);
60	int ret;
61
62	/*
63	 * These values are saved in the private data and returned
64	 * when ipoib_get_coalesce() is called
65	 */
66	if (coal->rx_coalesce_usecs       > 0xffff ||
67	    coal->rx_max_coalesced_frames > 0xffff)
68		return -EINVAL;
69
70	ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
71			   coal->rx_coalesce_usecs);
72	if (ret && ret != -ENOSYS) {
73		ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
74		return ret;
75	}
76
77	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
78	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
79
80	return 0;
81}
82
83static const struct ethtool_ops ipoib_ethtool_ops = {
84	.get_drvinfo		= ipoib_get_drvinfo,
85	.get_coalesce		= ipoib_get_coalesce,
86	.set_coalesce		= ipoib_set_coalesce,
87};
88
89void ipoib_set_ethtool_ops(struct net_device *dev)
90{
91	SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
92}
93