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/netdevice.h>
35
36#include "ipoib.h"
37
38static void ipoib_get_drvinfo(struct ifnet *netdev,
39			      struct ethtool_drvinfo *drvinfo)
40{
41	strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
42}
43
44static u32 ipoib_get_rx_csum(struct ifnet *dev)
45{
46	struct ipoib_dev_priv *priv = dev->if_softc;
47	return test_bit(IPOIB_FLAG_CSUM, &priv->flags) &&
48		!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
49}
50
51static int ipoib_get_coalesce(struct ifnet *dev,
52			      struct ethtool_coalesce *coal)
53{
54	struct ipoib_dev_priv *priv = dev->if_softc;
55
56	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
57	coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
58	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
59	coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
60
61	return 0;
62}
63
64static int ipoib_set_coalesce(struct ifnet *dev,
65			      struct ethtool_coalesce *coal)
66{
67	struct ipoib_dev_priv *priv = dev->if_softc;
68	int ret;
69
70	/*
71	 * Since IPoIB uses a single CQ for both rx and tx, we assume
72	 * that rx params dictate the configuration.  These values are
73	 * saved in the private data and returned when ipoib_get_coalesce()
74	 * is called.
75	 */
76	if (coal->rx_coalesce_usecs       > 0xffff ||
77	    coal->rx_max_coalesced_frames > 0xffff)
78		return -EINVAL;
79
80	if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) {
81		if (!coal->rx_max_coalesced_frames)
82			coal->rx_max_coalesced_frames = 0xffff;
83		else if (!coal->rx_coalesce_usecs)
84			coal->rx_coalesce_usecs = 0xffff;
85	}
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	coal->tx_coalesce_usecs       = coal->rx_coalesce_usecs;
95	coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
96	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
97	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
98
99	return 0;
100}
101
102static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
103	"LRO aggregated", "LRO flushed",
104	"LRO avg aggr", "LRO no desc"
105};
106
107static void ipoib_get_strings(struct ifnet *netdev, u32 stringset, u8 *data)
108{
109	switch (stringset) {
110	case ETH_SS_STATS:
111		memcpy(data, *ipoib_stats_keys,	sizeof(ipoib_stats_keys));
112		break;
113	}
114}
115
116static int ipoib_get_sset_count(struct ifnet *dev, int sset)
117{
118	switch (sset) {
119	case ETH_SS_STATS:
120		return ARRAY_SIZE(ipoib_stats_keys);
121	default:
122		return -EOPNOTSUPP;
123	}
124}
125
126static void ipoib_get_ethtool_stats(struct ifnet *dev,
127				struct ethtool_stats *stats, uint64_t *data)
128{
129	struct ipoib_dev_priv *priv = dev->if_softc;
130	int index = 0;
131
132	/* Get LRO statistics */
133	data[index++] = priv->lro.lro_mgr.stats.aggregated;
134	data[index++] = priv->lro.lro_mgr.stats.flushed;
135	if (priv->lro.lro_mgr.stats.flushed)
136		data[index++] = priv->lro.lro_mgr.stats.aggregated /
137				priv->lro.lro_mgr.stats.flushed;
138	else
139		data[index++] = 0;
140	data[index++] = priv->lro.lro_mgr.stats.no_desc;
141}
142
143static const struct ethtool_ops ipoib_ethtool_ops = {
144	.get_drvinfo		= ipoib_get_drvinfo,
145	.get_rx_csum		= ipoib_get_rx_csum,
146	.get_coalesce		= ipoib_get_coalesce,
147	.set_coalesce		= ipoib_set_coalesce,
148	.get_flags		= ethtool_op_get_flags,
149	.set_flags		= ethtool_op_set_flags,
150	.get_strings		= ipoib_get_strings,
151	.get_sset_count		= ipoib_get_sset_count,
152	.get_ethtool_stats	= ipoib_get_ethtool_stats,
153};
154
155void ipoib_set_ethtool_ops(struct ifnet *dev)
156{
157	SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
158}
159