1 /*
2  * Copyright(c) 2017 Intel Corporation.
3  *
4  * This file is provided under a dual BSD/GPLv2 license.  When using or
5  * redistributing this file, you may do so under either license.
6  *
7  * GPL LICENSE SUMMARY
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of version 2 of the GNU General Public License as
11  * published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  * BSD LICENSE
19  *
20  * Redistribution and use in source and binary forms, with or without
21  * modification, are permitted provided that the following conditions
22  * are met:
23  *
24  *  - Redistributions of source code must retain the above copyright
25  *    notice, this list of conditions and the following disclaimer.
26  *  - Redistributions in binary form must reproduce the above copyright
27  *    notice, this list of conditions and the following disclaimer in
28  *    the documentation and/or other materials provided with the
29  *    distribution.
30  *  - Neither the name of Intel Corporation nor the names of its
31  *    contributors may be used to endorse or promote products derived
32  *    from this software without specific prior written permission.
33  *
34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45  *
46  */
47 
48 /*
49  * This file contains OPA VNIC ethtool functions
50  */
51 
52 #include <linux/ethtool.h>
53 
54 #include "opa_vnic_internal.h"
55 
56 enum {NETDEV_STATS, VNIC_STATS};
57 
58 struct vnic_stats {
59 	char stat_string[ETH_GSTRING_LEN];
60 	struct {
61 		int sizeof_stat;
62 		int stat_offset;
63 	};
64 };
65 
66 #define VNIC_STAT(m)            { sizeof_field(struct opa_vnic_stats, m),   \
67 				  offsetof(struct opa_vnic_stats, m) }
68 
69 static struct vnic_stats vnic_gstrings_stats[] = {
70 	/* NETDEV stats */
71 	{"rx_packets", VNIC_STAT(netstats.rx_packets)},
72 	{"tx_packets", VNIC_STAT(netstats.tx_packets)},
73 	{"rx_bytes", VNIC_STAT(netstats.rx_bytes)},
74 	{"tx_bytes", VNIC_STAT(netstats.tx_bytes)},
75 	{"rx_errors", VNIC_STAT(netstats.rx_errors)},
76 	{"tx_errors", VNIC_STAT(netstats.tx_errors)},
77 	{"rx_dropped", VNIC_STAT(netstats.rx_dropped)},
78 	{"tx_dropped", VNIC_STAT(netstats.tx_dropped)},
79 
80 	/* SUMMARY counters */
81 	{"tx_unicast", VNIC_STAT(tx_grp.unicast)},
82 	{"tx_mcastbcast", VNIC_STAT(tx_grp.mcastbcast)},
83 	{"tx_untagged", VNIC_STAT(tx_grp.untagged)},
84 	{"tx_vlan", VNIC_STAT(tx_grp.vlan)},
85 
86 	{"tx_64_size", VNIC_STAT(tx_grp.s_64)},
87 	{"tx_65_127", VNIC_STAT(tx_grp.s_65_127)},
88 	{"tx_128_255", VNIC_STAT(tx_grp.s_128_255)},
89 	{"tx_256_511", VNIC_STAT(tx_grp.s_256_511)},
90 	{"tx_512_1023", VNIC_STAT(tx_grp.s_512_1023)},
91 	{"tx_1024_1518", VNIC_STAT(tx_grp.s_1024_1518)},
92 	{"tx_1519_max", VNIC_STAT(tx_grp.s_1519_max)},
93 
94 	{"rx_unicast", VNIC_STAT(rx_grp.unicast)},
95 	{"rx_mcastbcast", VNIC_STAT(rx_grp.mcastbcast)},
96 	{"rx_untagged", VNIC_STAT(rx_grp.untagged)},
97 	{"rx_vlan", VNIC_STAT(rx_grp.vlan)},
98 
99 	{"rx_64_size", VNIC_STAT(rx_grp.s_64)},
100 	{"rx_65_127", VNIC_STAT(rx_grp.s_65_127)},
101 	{"rx_128_255", VNIC_STAT(rx_grp.s_128_255)},
102 	{"rx_256_511", VNIC_STAT(rx_grp.s_256_511)},
103 	{"rx_512_1023", VNIC_STAT(rx_grp.s_512_1023)},
104 	{"rx_1024_1518", VNIC_STAT(rx_grp.s_1024_1518)},
105 	{"rx_1519_max", VNIC_STAT(rx_grp.s_1519_max)},
106 
107 	/* ERROR counters */
108 	{"rx_fifo_errors", VNIC_STAT(netstats.rx_fifo_errors)},
109 	{"rx_length_errors", VNIC_STAT(netstats.rx_length_errors)},
110 
111 	{"tx_fifo_errors", VNIC_STAT(netstats.tx_fifo_errors)},
112 	{"tx_carrier_errors", VNIC_STAT(netstats.tx_carrier_errors)},
113 
114 	{"tx_dlid_zero", VNIC_STAT(tx_dlid_zero)},
115 	{"tx_drop_state", VNIC_STAT(tx_drop_state)},
116 	{"rx_drop_state", VNIC_STAT(rx_drop_state)},
117 	{"rx_oversize", VNIC_STAT(rx_oversize)},
118 	{"rx_runt", VNIC_STAT(rx_runt)},
119 };
120 
121 #define VNIC_STATS_LEN  ARRAY_SIZE(vnic_gstrings_stats)
122 
123 /* vnic_get_drvinfo - get driver info */
124 static void vnic_get_drvinfo(struct net_device *netdev,
125 			     struct ethtool_drvinfo *drvinfo)
126 {
127 	strlcpy(drvinfo->driver, opa_vnic_driver_name, sizeof(drvinfo->driver));
128 	strlcpy(drvinfo->bus_info, dev_name(netdev->dev.parent),
129 		sizeof(drvinfo->bus_info));
130 }
131 
132 /* vnic_get_sset_count - get string set count */
133 static int vnic_get_sset_count(struct net_device *netdev, int sset)
134 {
135 	return (sset == ETH_SS_STATS) ? VNIC_STATS_LEN : -EOPNOTSUPP;
136 }
137 
138 /* vnic_get_ethtool_stats - get statistics */
139 static void vnic_get_ethtool_stats(struct net_device *netdev,
140 				   struct ethtool_stats *stats, u64 *data)
141 {
142 	struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
143 	struct opa_vnic_stats vstats;
144 	int i;
145 
146 	memset(&vstats, 0, sizeof(vstats));
147 	spin_lock(&adapter->stats_lock);
148 	adapter->rn_ops->ndo_get_stats64(netdev, &vstats.netstats);
149 	spin_unlock(&adapter->stats_lock);
150 	for (i = 0; i < VNIC_STATS_LEN; i++) {
151 		char *p = (char *)&vstats + vnic_gstrings_stats[i].stat_offset;
152 
153 		data[i] = (vnic_gstrings_stats[i].sizeof_stat ==
154 			   sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
155 	}
156 }
157 
158 /* vnic_get_strings - get strings */
159 static void vnic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
160 {
161 	int i;
162 
163 	if (stringset != ETH_SS_STATS)
164 		return;
165 
166 	for (i = 0; i < VNIC_STATS_LEN; i++)
167 		memcpy(data + i * ETH_GSTRING_LEN,
168 		       vnic_gstrings_stats[i].stat_string,
169 		       ETH_GSTRING_LEN);
170 }
171 
172 /* ethtool ops */
173 static const struct ethtool_ops opa_vnic_ethtool_ops = {
174 	.get_drvinfo = vnic_get_drvinfo,
175 	.get_link = ethtool_op_get_link,
176 	.get_strings = vnic_get_strings,
177 	.get_sset_count = vnic_get_sset_count,
178 	.get_ethtool_stats = vnic_get_ethtool_stats,
179 };
180 
181 /* opa_vnic_set_ethtool_ops - set ethtool ops */
182 void opa_vnic_set_ethtool_ops(struct net_device *netdev)
183 {
184 	netdev->ethtool_ops = &opa_vnic_ethtool_ops;
185 }
186