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	struct ipoib_dev_priv *priv = netdev_priv(netdev);
43	struct ib_device_attr *attr;
44
45	attr = kmalloc(sizeof(*attr), GFP_KERNEL);
46	if (attr && !ib_query_device(priv->ca, attr))
47		snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
48			 "%d.%d.%d", (int)(attr->fw_ver >> 32),
49			 (int)(attr->fw_ver >> 16) & 0xffff,
50			 (int)attr->fw_ver & 0xffff);
51	kfree(attr);
52
53	strlcpy(drvinfo->bus_info, dev_name(priv->ca->dma_device),
54		sizeof(drvinfo->bus_info));
55
56	strlcpy(drvinfo->version, ipoib_driver_version,
57		sizeof(drvinfo->version));
58
59	strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
60}
61
62static int ipoib_get_coalesce(struct net_device *dev,
63			      struct ethtool_coalesce *coal)
64{
65	struct ipoib_dev_priv *priv = netdev_priv(dev);
66
67	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
68	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
69
70	return 0;
71}
72
73static int ipoib_set_coalesce(struct net_device *dev,
74			      struct ethtool_coalesce *coal)
75{
76	struct ipoib_dev_priv *priv = netdev_priv(dev);
77	int ret;
78
79	/*
80	 * These values are saved in the private data and returned
81	 * when ipoib_get_coalesce() is called
82	 */
83	if (coal->rx_coalesce_usecs       > 0xffff ||
84	    coal->rx_max_coalesced_frames > 0xffff)
85		return -EINVAL;
86
87	ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
88			   coal->rx_coalesce_usecs);
89	if (ret && ret != -ENOSYS) {
90		ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
91		return ret;
92	}
93
94	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
95	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
96
97	return 0;
98}
99
100static const struct ethtool_ops ipoib_ethtool_ops = {
101	.get_drvinfo		= ipoib_get_drvinfo,
102	.get_coalesce		= ipoib_get_coalesce,
103	.set_coalesce		= ipoib_set_coalesce,
104};
105
106void ipoib_set_ethtool_ops(struct net_device *dev)
107{
108	dev->ethtool_ops = &ipoib_ethtool_ops;
109}
110