1/*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses.  You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include <linux/kernel.h>
39#include <linux/netdevice.h>
40
41#include "ipoib.h"
42
43static void ipoib_get_drvinfo(struct ifnet *netdev,
44			      struct ethtool_drvinfo *drvinfo)
45{
46	strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
47}
48
49static u32 ipoib_get_rx_csum(struct ifnet *dev)
50{
51	struct ipoib_dev_priv *priv = dev->if_softc;
52	return test_bit(IPOIB_FLAG_CSUM, &priv->flags) &&
53		!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
54}
55
56static int ipoib_get_coalesce(struct ifnet *dev,
57			      struct ethtool_coalesce *coal)
58{
59	struct ipoib_dev_priv *priv = dev->if_softc;
60
61	coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
62	coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
63	coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
64	coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
65
66	return 0;
67}
68
69static int ipoib_set_coalesce(struct ifnet *dev,
70			      struct ethtool_coalesce *coal)
71{
72	struct ipoib_dev_priv *priv = dev->if_softc;
73	int ret;
74
75	/*
76	 * Since IPoIB uses a single CQ for both rx and tx, we assume
77	 * that rx params dictate the configuration.  These values are
78	 * saved in the private data and returned when ipoib_get_coalesce()
79	 * is called.
80	 */
81	if (coal->rx_coalesce_usecs       > 0xffff ||
82	    coal->rx_max_coalesced_frames > 0xffff)
83		return -EINVAL;
84
85	if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) {
86		if (!coal->rx_max_coalesced_frames)
87			coal->rx_max_coalesced_frames = 0xffff;
88		else if (!coal->rx_coalesce_usecs)
89			coal->rx_coalesce_usecs = 0xffff;
90	}
91
92	ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
93			   coal->rx_coalesce_usecs);
94	if (ret && ret != -ENOSYS) {
95		ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
96		return ret;
97	}
98
99	coal->tx_coalesce_usecs       = coal->rx_coalesce_usecs;
100	coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
101	priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
102	priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
103
104	return 0;
105}
106
107static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
108	"LRO aggregated", "LRO flushed",
109	"LRO avg aggr", "LRO no desc"
110};
111
112static void ipoib_get_strings(struct ifnet *netdev, u32 stringset, u8 *data)
113{
114	switch (stringset) {
115	case ETH_SS_STATS:
116		memcpy(data, *ipoib_stats_keys,	sizeof(ipoib_stats_keys));
117		break;
118	}
119}
120
121static int ipoib_get_sset_count(struct ifnet *dev, int sset)
122{
123	switch (sset) {
124	case ETH_SS_STATS:
125		return ARRAY_SIZE(ipoib_stats_keys);
126	default:
127		return -EOPNOTSUPP;
128	}
129}
130
131static void ipoib_get_ethtool_stats(struct ifnet *dev,
132				struct ethtool_stats *stats, uint64_t *data)
133{
134	struct ipoib_dev_priv *priv = dev->if_softc;
135	int index = 0;
136
137	/* Get LRO statistics */
138	data[index++] = priv->lro.lro_mgr.stats.aggregated;
139	data[index++] = priv->lro.lro_mgr.stats.flushed;
140	if (priv->lro.lro_mgr.stats.flushed)
141		data[index++] = priv->lro.lro_mgr.stats.aggregated /
142				priv->lro.lro_mgr.stats.flushed;
143	else
144		data[index++] = 0;
145	data[index++] = priv->lro.lro_mgr.stats.no_desc;
146}
147
148static const struct ethtool_ops ipoib_ethtool_ops = {
149	.get_drvinfo		= ipoib_get_drvinfo,
150	.get_rx_csum		= ipoib_get_rx_csum,
151	.get_coalesce		= ipoib_get_coalesce,
152	.set_coalesce		= ipoib_set_coalesce,
153	.get_flags		= ethtool_op_get_flags,
154	.set_flags		= ethtool_op_set_flags,
155	.get_strings		= ipoib_get_strings,
156	.get_sset_count		= ipoib_get_sset_count,
157	.get_ethtool_stats	= ipoib_get_ethtool_stats,
158};
159
160void ipoib_set_ethtool_ops(struct ifnet *dev)
161{
162	SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
163}
164