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 
39 static void ipoib_get_drvinfo(struct net_device *netdev,
40 			      struct ethtool_drvinfo *drvinfo)
41 {
42 	struct ipoib_dev_priv *priv = netdev_priv(netdev);
43 
44 	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
45 		 "%d.%d.%d", (int)(priv->ca->attrs.fw_ver >> 32),
46 		 (int)(priv->ca->attrs.fw_ver >> 16) & 0xffff,
47 		 (int)priv->ca->attrs.fw_ver & 0xffff);
48 
49 	strlcpy(drvinfo->bus_info, dev_name(priv->ca->dma_device),
50 		sizeof(drvinfo->bus_info));
51 
52 	strlcpy(drvinfo->version, ipoib_driver_version,
53 		sizeof(drvinfo->version));
54 
55 	strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
56 }
57 
58 static int ipoib_get_coalesce(struct net_device *dev,
59 			      struct ethtool_coalesce *coal)
60 {
61 	struct ipoib_dev_priv *priv = netdev_priv(dev);
62 
63 	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
64 	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
65 
66 	return 0;
67 }
68 
69 static int ipoib_set_coalesce(struct net_device *dev,
70 			      struct ethtool_coalesce *coal)
71 {
72 	struct ipoib_dev_priv *priv = netdev_priv(dev);
73 	int ret;
74 
75 	/*
76 	 * These values are saved in the private data and returned
77 	 * when ipoib_get_coalesce() is called
78 	 */
79 	if (coal->rx_coalesce_usecs       > 0xffff ||
80 	    coal->rx_max_coalesced_frames > 0xffff)
81 		return -EINVAL;
82 
83 	ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
84 			   coal->rx_coalesce_usecs);
85 	if (ret && ret != -ENOSYS) {
86 		ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
87 		return ret;
88 	}
89 
90 	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
91 	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
92 
93 	return 0;
94 }
95 
96 static const struct ethtool_ops ipoib_ethtool_ops = {
97 	.get_drvinfo		= ipoib_get_drvinfo,
98 	.get_coalesce		= ipoib_get_coalesce,
99 	.set_coalesce		= ipoib_set_coalesce,
100 };
101 
102 void ipoib_set_ethtool_ops(struct net_device *dev)
103 {
104 	dev->ethtool_ops = &ipoib_ethtool_ops;
105 }
106