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_rx_csum(struct net_device * dev)45 static u32 ipoib_get_rx_csum(struct net_device *dev)
46 {
47 struct ipoib_dev_priv *priv = netdev_priv(dev);
48 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) &&
49 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
50 }
51
ipoib_set_tso(struct net_device * dev,u32 data)52 static int ipoib_set_tso(struct net_device *dev, u32 data)
53 {
54 struct ipoib_dev_priv *priv = netdev_priv(dev);
55
56 if (data) {
57 if (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
58 (dev->features & NETIF_F_SG) &&
59 (priv->hca_caps & IB_DEVICE_UD_TSO)) {
60 dev->features |= NETIF_F_TSO;
61 } else {
62 ipoib_warn(priv, "can't set TSO on\n");
63 return -EOPNOTSUPP;
64 }
65 } else
66 dev->features &= ~NETIF_F_TSO;
67
68 return 0;
69 }
70
ipoib_get_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)71 static int ipoib_get_coalesce(struct net_device *dev,
72 struct ethtool_coalesce *coal)
73 {
74 struct ipoib_dev_priv *priv = netdev_priv(dev);
75
76 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
77 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
78
79 return 0;
80 }
81
ipoib_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coal)82 static int ipoib_set_coalesce(struct net_device *dev,
83 struct ethtool_coalesce *coal)
84 {
85 struct ipoib_dev_priv *priv = netdev_priv(dev);
86 int ret;
87
88 /*
89 * These values are saved in the private data and returned
90 * when ipoib_get_coalesce() is called
91 */
92 if (coal->rx_coalesce_usecs > 0xffff ||
93 coal->rx_max_coalesced_frames > 0xffff)
94 return -EINVAL;
95
96 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
97 coal->rx_coalesce_usecs);
98 if (ret && ret != -ENOSYS) {
99 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
100 return ret;
101 }
102
103 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
104 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
105
106 return 0;
107 }
108
109 static const struct ethtool_ops ipoib_ethtool_ops = {
110 .get_drvinfo = ipoib_get_drvinfo,
111 .get_rx_csum = ipoib_get_rx_csum,
112 .set_tso = ipoib_set_tso,
113 .get_coalesce = ipoib_get_coalesce,
114 .set_coalesce = ipoib_set_coalesce,
115 };
116
ipoib_set_ethtool_ops(struct net_device * dev)117 void ipoib_set_ethtool_ops(struct net_device *dev)
118 {
119 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
120 }
121