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 
43 static void ipoib_get_drvinfo(if_t netdev,
44 			      struct ethtool_drvinfo *drvinfo)
45 {
46 	strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
47 }
48 
49 static u32 ipoib_get_rx_csum(if_t 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 
56 static int ipoib_get_coalesce(if_t 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 
69 static int ipoib_set_coalesce(if_t 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 
107 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
108 	"LRO aggregated", "LRO flushed",
109 	"LRO avg aggr", "LRO no desc"
110 };
111 
112 static void ipoib_get_strings(if_t 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 
121 static int ipoib_get_sset_count(if_t 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 
131 static void ipoib_get_ethtool_stats(if_t 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 
148 static 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 
160 void ipoib_set_ethtool_ops(if_t dev)
161 {
162 	SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
163 }
164