2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/kernel.h>
34 #include <linux/ethtool.h>
35 #include <linux/netdevice.h>
39 static void ipoib_get_drvinfo(struct net_device *netdev,
40 struct ethtool_drvinfo *drvinfo)
42 strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
45 static int ipoib_get_coalesce(struct net_device *dev,
46 struct ethtool_coalesce *coal)
48 struct ipoib_dev_priv *priv = netdev_priv(dev);
50 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
51 coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
52 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
53 coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
58 static int ipoib_set_coalesce(struct net_device *dev,
59 struct ethtool_coalesce *coal)
61 struct ipoib_dev_priv *priv = netdev_priv(dev);
65 * Since IPoIB uses a single CQ for both rx and tx, we assume
66 * that rx params dictate the configuration. These values are
67 * saved in the private data and returned when ipoib_get_coalesce()
70 if (coal->rx_coalesce_usecs > 0xffff ||
71 coal->rx_max_coalesced_frames > 0xffff)
74 ret = ib_modify_cq(priv->cq, coal->rx_max_coalesced_frames,
75 coal->rx_coalesce_usecs);
76 if (ret && ret != -ENOSYS) {
77 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
81 coal->tx_coalesce_usecs = coal->rx_coalesce_usecs;
82 coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
83 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
84 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
89 static const struct ethtool_ops ipoib_ethtool_ops = {
90 .get_drvinfo = ipoib_get_drvinfo,
91 .get_tso = ethtool_op_get_tso,
92 .get_coalesce = ipoib_get_coalesce,
93 .set_coalesce = ipoib_set_coalesce,
96 void ipoib_set_ethtool_ops(struct net_device *dev)
98 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);