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 #include <linux/kernel.h>
37 #include <linux/netdevice.h>
38
39 #include "ipoib.h"
40
ipoib_get_drvinfo(if_t netdev,struct ethtool_drvinfo * drvinfo)41 static void ipoib_get_drvinfo(if_t netdev,
42 struct ethtool_drvinfo *drvinfo)
43 {
44 strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
45 }
46
ipoib_get_rx_csum(if_t dev)47 static u32 ipoib_get_rx_csum(if_t dev)
48 {
49 struct ipoib_dev_priv *priv = dev->if_softc;
50 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) &&
51 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
52 }
53
ipoib_get_coalesce(if_t dev,struct ethtool_coalesce * coal)54 static int ipoib_get_coalesce(if_t dev,
55 struct ethtool_coalesce *coal)
56 {
57 struct ipoib_dev_priv *priv = dev->if_softc;
58
59 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
60 coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
61 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
62 coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
63
64 return 0;
65 }
66
ipoib_set_coalesce(if_t dev,struct ethtool_coalesce * coal)67 static int ipoib_set_coalesce(if_t dev,
68 struct ethtool_coalesce *coal)
69 {
70 struct ipoib_dev_priv *priv = dev->if_softc;
71 int ret;
72
73 /*
74 * Since IPoIB uses a single CQ for both rx and tx, we assume
75 * that rx params dictate the configuration. These values are
76 * saved in the private data and returned when ipoib_get_coalesce()
77 * is called.
78 */
79 if (coal->rx_coalesce_usecs > 0xffff ||
80 coal->rx_max_coalesced_frames > 0xffff)
81 return -EINVAL;
82
83 if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) {
84 if (!coal->rx_max_coalesced_frames)
85 coal->rx_max_coalesced_frames = 0xffff;
86 else if (!coal->rx_coalesce_usecs)
87 coal->rx_coalesce_usecs = 0xffff;
88 }
89
90 ret = rdma_set_cq_moderation(priv->recv_cq,
91 coal->rx_max_coalesced_frames,
92 coal->rx_coalesce_usecs);
93 if (ret && ret != -EOPNOTSUPP) {
94 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
95 return ret;
96 }
97
98 coal->tx_coalesce_usecs = coal->rx_coalesce_usecs;
99 coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
100 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
101 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
102
103 return 0;
104 }
105
106 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
107 "LRO aggregated", "LRO flushed",
108 "LRO avg aggr", "LRO no desc"
109 };
110
ipoib_get_strings(if_t netdev,u32 stringset,u8 * data)111 static void ipoib_get_strings(if_t netdev, u32 stringset, u8 *data)
112 {
113 switch (stringset) {
114 case ETH_SS_STATS:
115 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys));
116 break;
117 }
118 }
119
ipoib_get_sset_count(if_t dev,int sset)120 static int ipoib_get_sset_count(if_t dev, int sset)
121 {
122 switch (sset) {
123 case ETH_SS_STATS:
124 return ARRAY_SIZE(ipoib_stats_keys);
125 default:
126 return -EOPNOTSUPP;
127 }
128 }
129
ipoib_get_ethtool_stats(if_t dev,struct ethtool_stats * stats,uint64_t * data)130 static void ipoib_get_ethtool_stats(if_t dev,
131 struct ethtool_stats *stats, uint64_t *data)
132 {
133 struct ipoib_dev_priv *priv = dev->if_softc;
134 int index = 0;
135
136 /* Get LRO statistics */
137 data[index++] = priv->lro.lro_mgr.stats.aggregated;
138 data[index++] = priv->lro.lro_mgr.stats.flushed;
139 if (priv->lro.lro_mgr.stats.flushed)
140 data[index++] = priv->lro.lro_mgr.stats.aggregated /
141 priv->lro.lro_mgr.stats.flushed;
142 else
143 data[index++] = 0;
144 data[index++] = priv->lro.lro_mgr.stats.no_desc;
145 }
146
147 static const struct ethtool_ops ipoib_ethtool_ops = {
148 .get_drvinfo = ipoib_get_drvinfo,
149 .get_rx_csum = ipoib_get_rx_csum,
150 .get_coalesce = ipoib_get_coalesce,
151 .set_coalesce = ipoib_set_coalesce,
152 .get_flags = ethtool_op_get_flags,
153 .set_flags = ethtool_op_set_flags,
154 .get_strings = ipoib_get_strings,
155 .get_sset_count = ipoib_get_sset_count,
156 .get_ethtool_stats = ipoib_get_ethtool_stats,
157 };
158
ipoib_set_ethtool_ops(if_t dev)159 void ipoib_set_ethtool_ops(if_t dev)
160 {
161 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
162 }
163