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
ipoib_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)39 static 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
ipoib_get_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)45 static 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
ipoib_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)56 static 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
83 static 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
ipoib_set_ethtool_ops(struct net_device * dev)89 void ipoib_set_ethtool_ops(struct net_device *dev)
90 {
91 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
92 }
93