1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * DPAA2 Ethernet Switch ethtool support
4 *
5 * Copyright 2014-2016 Freescale Semiconductor Inc.
6 * Copyright 2017-2018 NXP
7 *
8 */
9
10 #include "ethsw.h"
11
12 static struct {
13 enum dpsw_counter id;
14 char name[ETH_GSTRING_LEN];
15 } ethsw_ethtool_counters[] = {
16 {DPSW_CNT_ING_FRAME, "rx frames"},
17 {DPSW_CNT_ING_BYTE, "rx bytes"},
18 {DPSW_CNT_ING_FLTR_FRAME, "rx filtered frames"},
19 {DPSW_CNT_ING_FRAME_DISCARD, "rx discarded frames"},
20 {DPSW_CNT_ING_BCAST_FRAME, "rx b-cast frames"},
21 {DPSW_CNT_ING_BCAST_BYTES, "rx b-cast bytes"},
22 {DPSW_CNT_ING_MCAST_FRAME, "rx m-cast frames"},
23 {DPSW_CNT_ING_MCAST_BYTE, "rx m-cast bytes"},
24 {DPSW_CNT_EGR_FRAME, "tx frames"},
25 {DPSW_CNT_EGR_BYTE, "tx bytes"},
26 {DPSW_CNT_EGR_FRAME_DISCARD, "tx discarded frames"},
27
28 };
29
30 #define ETHSW_NUM_COUNTERS ARRAY_SIZE(ethsw_ethtool_counters)
31
ethsw_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)32 static void ethsw_get_drvinfo(struct net_device *netdev,
33 struct ethtool_drvinfo *drvinfo)
34 {
35 struct ethsw_port_priv *port_priv = netdev_priv(netdev);
36 u16 version_major, version_minor;
37 int err;
38
39 strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
40
41 err = dpsw_get_api_version(port_priv->ethsw_data->mc_io, 0,
42 &version_major,
43 &version_minor);
44 if (err)
45 strlcpy(drvinfo->fw_version, "N/A",
46 sizeof(drvinfo->fw_version));
47 else
48 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
49 "%u.%u", version_major, version_minor);
50
51 strlcpy(drvinfo->bus_info, dev_name(netdev->dev.parent->parent),
52 sizeof(drvinfo->bus_info));
53 }
54
55 static int
ethsw_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * link_ksettings)56 ethsw_get_link_ksettings(struct net_device *netdev,
57 struct ethtool_link_ksettings *link_ksettings)
58 {
59 struct ethsw_port_priv *port_priv = netdev_priv(netdev);
60 struct dpsw_link_state state = {0};
61 int err = 0;
62
63 err = dpsw_if_get_link_state(port_priv->ethsw_data->mc_io, 0,
64 port_priv->ethsw_data->dpsw_handle,
65 port_priv->idx,
66 &state);
67 if (err) {
68 netdev_err(netdev, "ERROR %d getting link state", err);
69 goto out;
70 }
71
72 /* At the moment, we have no way of interrogating the DPMAC
73 * from the DPSW side or there may not exist a DPMAC at all.
74 * Report only autoneg state, duplexity and speed.
75 */
76 if (state.options & DPSW_LINK_OPT_AUTONEG)
77 link_ksettings->base.autoneg = AUTONEG_ENABLE;
78 if (!(state.options & DPSW_LINK_OPT_HALF_DUPLEX))
79 link_ksettings->base.duplex = DUPLEX_FULL;
80 link_ksettings->base.speed = state.rate;
81
82 out:
83 return err;
84 }
85
86 static int
ethsw_set_link_ksettings(struct net_device * netdev,const struct ethtool_link_ksettings * link_ksettings)87 ethsw_set_link_ksettings(struct net_device *netdev,
88 const struct ethtool_link_ksettings *link_ksettings)
89 {
90 struct ethsw_port_priv *port_priv = netdev_priv(netdev);
91 struct dpsw_link_cfg cfg = {0};
92 int err = 0;
93
94 netdev_dbg(netdev, "Setting link parameters...");
95
96 /* Due to a temporary MC limitation, the DPSW port must be down
97 * in order to be able to change link settings. Taking steps to let
98 * the user know that.
99 */
100 if (netif_running(netdev)) {
101 netdev_info(netdev, "Sorry, interface must be brought down first.\n");
102 return -EACCES;
103 }
104
105 cfg.rate = link_ksettings->base.speed;
106 if (link_ksettings->base.autoneg == AUTONEG_ENABLE)
107 cfg.options |= DPSW_LINK_OPT_AUTONEG;
108 else
109 cfg.options &= ~DPSW_LINK_OPT_AUTONEG;
110 if (link_ksettings->base.duplex == DUPLEX_HALF)
111 cfg.options |= DPSW_LINK_OPT_HALF_DUPLEX;
112 else
113 cfg.options &= ~DPSW_LINK_OPT_HALF_DUPLEX;
114
115 err = dpsw_if_set_link_cfg(port_priv->ethsw_data->mc_io, 0,
116 port_priv->ethsw_data->dpsw_handle,
117 port_priv->idx,
118 &cfg);
119 if (err)
120 /* ethtool will be loud enough if we return an error; no point
121 * in putting our own error message on the console by default
122 */
123 netdev_dbg(netdev, "ERROR %d setting link cfg", err);
124
125 return err;
126 }
127
ethsw_ethtool_get_sset_count(struct net_device * dev,int sset)128 static int ethsw_ethtool_get_sset_count(struct net_device *dev, int sset)
129 {
130 switch (sset) {
131 case ETH_SS_STATS:
132 return ETHSW_NUM_COUNTERS;
133 default:
134 return -EOPNOTSUPP;
135 }
136 }
137
ethsw_ethtool_get_strings(struct net_device * netdev,u32 stringset,u8 * data)138 static void ethsw_ethtool_get_strings(struct net_device *netdev,
139 u32 stringset, u8 *data)
140 {
141 int i;
142
143 switch (stringset) {
144 case ETH_SS_STATS:
145 for (i = 0; i < ETHSW_NUM_COUNTERS; i++)
146 memcpy(data + i * ETH_GSTRING_LEN,
147 ethsw_ethtool_counters[i].name, ETH_GSTRING_LEN);
148 break;
149 }
150 }
151
ethsw_ethtool_get_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)152 static void ethsw_ethtool_get_stats(struct net_device *netdev,
153 struct ethtool_stats *stats,
154 u64 *data)
155 {
156 struct ethsw_port_priv *port_priv = netdev_priv(netdev);
157 int i, err;
158
159 memset(data, 0,
160 sizeof(u64) * ETHSW_NUM_COUNTERS);
161
162 for (i = 0; i < ETHSW_NUM_COUNTERS; i++) {
163 err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
164 port_priv->ethsw_data->dpsw_handle,
165 port_priv->idx,
166 ethsw_ethtool_counters[i].id,
167 &data[i]);
168 if (err)
169 netdev_err(netdev, "dpsw_if_get_counter[%s] err %d\n",
170 ethsw_ethtool_counters[i].name, err);
171 }
172 }
173
174 const struct ethtool_ops ethsw_port_ethtool_ops = {
175 .get_drvinfo = ethsw_get_drvinfo,
176 .get_link = ethtool_op_get_link,
177 .get_link_ksettings = ethsw_get_link_ksettings,
178 .set_link_ksettings = ethsw_set_link_ksettings,
179 .get_strings = ethsw_ethtool_get_strings,
180 .get_ethtool_stats = ethsw_ethtool_get_stats,
181 .get_sset_count = ethsw_ethtool_get_sset_count,
182 };
183
