aboutsummaryrefslogtreecommitdiffstats
path: root/net/dsa/slave.c
blob: 8f8868dd43028ba4f2badd99b20f5db043a7438a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
/*
 * net/dsa/slave.c - Slave device handling
 * Copyright (c) 2008 Marvell Semiconductor
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include "dsa_priv.h"

/* slave mii_bus handling ***************************************************/
static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
{
	struct dsa_switch *ds = bus->priv;

	if (ds->valid_port_mask & (1 << addr))
		return ds->drv->phy_read(ds, addr, reg);

	return 0xffff;
}

static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
{
	struct dsa_switch *ds = bus->priv;

	if (ds->valid_port_mask & (1 << addr))
		return ds->drv->phy_write(ds, addr, reg, val);

	return 0;
}

void dsa_slave_mii_bus_init(struct dsa_switch *ds)
{
	ds->slave_mii_bus->priv = (void *)ds;
	ds->slave_mii_bus->name = "dsa slave smi";
	ds->slave_mii_bus->read = dsa_slave_phy_read;
	ds->slave_mii_bus->write = dsa_slave_phy_write;
	snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s:%.2x",
			ds->master_mii_bus->id, ds->pd->sw_addr);
	ds->slave_mii_bus->parent = &(ds->master_mii_bus->dev);
}


/* slave device handling ****************************************************/
static int dsa_slave_open(struct net_device *dev)
{
	return 0;
}

static int dsa_slave_close(struct net_device *dev)
{
	return 0;
}

static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->master_netdev;

	if (change & IFF_ALLMULTI)
		dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
	if (change & IFF_PROMISC)
		dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
}

static void dsa_slave_set_rx_mode(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->master_netdev;

	dev_mc_sync(master, dev);
	dev_unicast_sync(master, dev);
}

static int dsa_slave_set_mac_address(struct net_device *dev, void *addr)
{
	memcpy(dev->dev_addr, addr + 2, 6);

	return 0;
}

static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct mii_ioctl_data *mii_data = if_mii(ifr);

	if (p->phy != NULL)
		return phy_mii_ioctl(p->phy, mii_data, cmd);

	return -EOPNOTSUPP;
}


/* ethtool operations *******************************************************/
static int
dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	int err;

	err = -EOPNOTSUPP;
	if (p->phy != NULL) {
		err = phy_read_status(p->phy);
		if (err == 0)
			err = phy_ethtool_gset(p->phy, cmd);
	}

	return err;
}

static int
dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct dsa_slave_priv *p = netdev_priv(dev);

	if (p->phy != NULL)
		return phy_ethtool_sset(p->phy, cmd);

	return -EOPNOTSUPP;
}

static void dsa_slave_get_drvinfo(struct net_device *dev,
				  struct ethtool_drvinfo *drvinfo)
{
	strncpy(drvinfo->driver, "dsa", 32);
	strncpy(drvinfo->version, dsa_driver_version, 32);
	strncpy(drvinfo->fw_version, "N/A", 32);
	strncpy(drvinfo->bus_info, "platform", 32);
}

static int dsa_slave_nway_reset(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);

	if (p->phy != NULL)
		return genphy_restart_aneg(p->phy);

	return -EOPNOTSUPP;
}

static u32 dsa_slave_get_link(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);

	if (p->phy != NULL) {
		genphy_update_link(p->phy);
		return p->phy->link;
	}

	return -EOPNOTSUPP;
}

static void dsa_slave_get_strings(struct net_device *dev,
				  uint32_t stringset, uint8_t *data)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;

	if (stringset == ETH_SS_STATS) {
		int len = ETH_GSTRING_LEN;

		strncpy(data, "tx_packets", len);
		strncpy(data + len, "tx_bytes", len);
		strncpy(data + 2 * len, "rx_packets", len);
		strncpy(data + 3 * len, "rx_bytes", len);
		if (ds->drv->get_strings != NULL)
			ds->drv->get_strings(ds, p->port, data + 4 * len);
	}
}

static void dsa_slave_get_ethtool_stats(struct net_device *dev,
					struct ethtool_stats *stats,
					uint64_t *data)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;

	data[0] = p->dev->stats.tx_packets;
	data[1] = p->dev->stats.tx_bytes;
	data[2] = p->dev->stats.rx_packets;
	data[3] = p->dev->stats.rx_bytes;
	if (ds->drv->get_ethtool_stats != NULL)
		ds->drv->get_ethtool_stats(ds, p->port, data + 4);
}

static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;

	if (sset == ETH_SS_STATS) {
		int count;

		count = 4;
		if (ds->drv->get_sset_count != NULL)
			count += ds->drv->get_sset_count(ds);

		return count;
	}

	return -EOPNOTSUPP;
}

static const struct ethtool_ops dsa_slave_ethtool_ops = {
	.get_settings		= dsa_slave_get_settings,
	.set_settings		= dsa_slave_set_settings,
	.get_drvinfo		= dsa_slave_get_drvinfo,
	.nway_reset		= dsa_slave_nway_reset,
	.get_link		= dsa_slave_get_link,
	.set_sg			= ethtool_op_set_sg,
	.get_strings		= dsa_slave_get_strings,
	.get_ethtool_stats	= dsa_slave_get_ethtool_stats,
	.get_sset_count		= dsa_slave_get_sset_count,
};


/* slave device setup *******************************************************/
struct net_device *
dsa_slave_create(struct dsa_switch *ds, struct device *parent,
		 int port, char *name)
{
	struct net_device *master = ds->master_netdev;
	struct net_device *slave_dev;
	struct dsa_slave_priv *p;
	int ret;

	slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv),
				 name, ether_setup);
	if (slave_dev == NULL)
		return slave_dev;

	slave_dev->features = master->vlan_features;
	SET_ETHTOOL_OPS(slave_dev, &dsa_slave_ethtool_ops);
	memcpy(slave_dev->dev_addr, master->dev_addr, ETH_ALEN);
	slave_dev->tx_queue_len = 0;
	switch (ds->tag_protocol) {
#ifdef CONFIG_NET_DSA_TAG_DSA
	case htons(ETH_P_DSA):
		slave_dev->hard_start_xmit = dsa_xmit;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
	case htons(ETH_P_EDSA):
		slave_dev->hard_start_xmit = edsa_xmit;
		break;
#endif
	default:
		BUG();
	}
	slave_dev->open = dsa_slave_open;
	slave_dev->stop = dsa_slave_close;
	slave_dev->change_rx_flags = dsa_slave_change_rx_flags;
	slave_dev->set_rx_mode = dsa_slave_set_rx_mode;
	slave_dev->set_multicast_list = dsa_slave_set_rx_mode;
	slave_dev->set_mac_address = dsa_slave_set_mac_address;
	slave_dev->do_ioctl = dsa_slave_ioctl;
	SET_NETDEV_DEV(slave_dev, parent);
	slave_dev->vlan_features = master->vlan_features;

	p = netdev_priv(slave_dev);
	p->dev = slave_dev;
	p->parent = ds;
	p->port = port;
	p->phy = ds->slave_mii_bus->phy_map[port];

	ret = register_netdev(slave_dev);
	if (ret) {
		printk(KERN_ERR "%s: error %d registering interface %s\n",
				master->name, ret, slave_dev->name);
		free_netdev(slave_dev);
		return NULL;
	}

	netif_carrier_off(slave_dev);

	if (p->phy != NULL) {
		phy_attach(slave_dev, p->phy->dev.bus_id,
			   0, PHY_INTERFACE_MODE_GMII);

		p->phy->autoneg = AUTONEG_ENABLE;
		p->phy->speed = 0;
		p->phy->duplex = 0;
		p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
		phy_start_aneg(p->phy);
	}

	return slave_dev;
}