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 	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 
62 static 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 
73 static 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 
100 static 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 
106 void ipoib_set_ethtool_ops(struct net_device *dev)
107 {
108 	dev->ethtool_ops = &ipoib_ethtool_ops;
109 }
110