[deliverable/linux.git] / net / dsa / slave.c

/*
 * net/dsa/slave.c - Slave device handling
 * Copyright (c) 2008-2009 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/etherdevice.h>
#include <linux/phy.h>
#include <linux/of_net.h>
#include <linux/of_mdio.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->phys_mii_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->phys_mii_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, "dsa-%d:%.2x",
			ds->index, ds->pd->sw_addr);
	ds->slave_mii_bus->parent = &ds->master_mii_bus->dev;
}


/* slave device handling ****************************************************/
static int dsa_slave_init(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);

	dev->iflink = p->parent->dst->master_netdev->ifindex;

	return 0;
}

static int dsa_slave_open(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->dst->master_netdev;
	int err;

	if (!(master->flags & IFF_UP))
		return -ENETDOWN;

	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
		err = dev_uc_add(master, dev->dev_addr);
		if (err < 0)
			goto out;
	}

	if (dev->flags & IFF_ALLMULTI) {
		err = dev_set_allmulti(master, 1);
		if (err < 0)
			goto del_unicast;
	}
	if (dev->flags & IFF_PROMISC) {
		err = dev_set_promiscuity(master, 1);
		if (err < 0)
			goto clear_allmulti;
	}

	return 0;

clear_allmulti:
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(master, -1);
del_unicast:
	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
		dev_uc_del(master, dev->dev_addr);
out:
	return err;
}

static int dsa_slave_close(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->dst->master_netdev;

	dev_mc_unsync(master, dev);
	dev_uc_unsync(master, dev);
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(master, -1);
	if (dev->flags & IFF_PROMISC)
		dev_set_promiscuity(master, -1);

	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
		dev_uc_del(master, dev->dev_addr);

	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->dst->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->dst->master_netdev;

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

static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct net_device *master = p->parent->dst->master_netdev;
	struct sockaddr *addr = a;
	int err;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	if (!(dev->flags & IFF_UP))
		goto out;

	if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
		err = dev_uc_add(master, addr->sa_data);
		if (err < 0)
			return err;
	}

	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
		dev_uc_del(master, dev->dev_addr);

out:
	ether_addr_copy(dev->dev_addr, addr->sa_data);

	return 0;
}

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

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

	return -EOPNOTSUPP;
}

static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch_tree *dst = p->parent->dst;

	return dst->ops->xmit(skb, dev);
}


/* 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)
{
	strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
	strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
	strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
	strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
}

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,
	.get_strings		= dsa_slave_get_strings,
	.get_ethtool_stats	= dsa_slave_get_ethtool_stats,
	.get_sset_count		= dsa_slave_get_sset_count,
};

static const struct net_device_ops dsa_slave_netdev_ops = {
	.ndo_init		= dsa_slave_init,
	.ndo_open	 	= dsa_slave_open,
	.ndo_stop		= dsa_slave_close,
	.ndo_start_xmit		= dsa_slave_xmit,
	.ndo_change_rx_flags	= dsa_slave_change_rx_flags,
	.ndo_set_rx_mode	= dsa_slave_set_rx_mode,
	.ndo_set_mac_address	= dsa_slave_set_mac_address,
	.ndo_do_ioctl		= dsa_slave_ioctl,
};

static void dsa_slave_adjust_link(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	unsigned int status_changed = 0;

	if (p->old_link != p->phy->link) {
		status_changed = 1;
		p->old_link = p->phy->link;
	}

	if (p->old_duplex != p->phy->duplex) {
		status_changed = 1;
		p->old_duplex = p->phy->duplex;
	}

	if (p->old_pause != p->phy->pause) {
		status_changed = 1;
		p->old_pause = p->phy->pause;
	}

	if (status_changed)
		phy_print_status(p->phy);
}

/* slave device setup *******************************************************/
static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
				struct net_device *slave_dev)
{
	struct dsa_switch *ds = p->parent;
	struct dsa_chip_data *cd = ds->pd;
	struct device_node *phy_dn, *port_dn;
	int ret;

	port_dn = cd->port_dn[p->port];
	p->phy_interface = of_get_phy_mode(port_dn);

	phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
	if (of_phy_is_fixed_link(port_dn)) {
		/* In the case of a fixed PHY, the DT node associated
		 * to the fixed PHY is the Port DT node
		 */
		ret = of_phy_register_fixed_link(port_dn);
		if (ret) {
			pr_err("failed to register fixed PHY\n");
			return;
		}
		phy_dn = port_dn;
	}

	if (phy_dn)
		p->phy = of_phy_connect(slave_dev, phy_dn,
					dsa_slave_adjust_link, 0,
					p->phy_interface);

	/* We could not connect to a designated PHY, so use the switch internal
	 * MDIO bus instead
	 */
	if (!p->phy)
		p->phy = ds->slave_mii_bus->phy_map[p->port];
	else
		pr_info("attached PHY at address %d [%s]\n",
			p->phy->addr, p->phy->drv->name);
}

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

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

	slave_dev->features = master->vlan_features;
	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
	eth_hw_addr_inherit(slave_dev, master);
	slave_dev->tx_queue_len = 0;
	slave_dev->netdev_ops = &dsa_slave_netdev_ops;

	switch (ds->dst->tag_protocol) {
#ifdef CONFIG_NET_DSA_TAG_DSA
	case htons(ETH_P_DSA):
		ds->dst->ops = &dsa_netdev_ops;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
	case htons(ETH_P_EDSA):
		ds->dst->ops = &edsa_netdev_ops;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
	case htons(ETH_P_TRAILER):
		ds->dst->ops = &trailer_netdev_ops;
		break;
#endif
	default:
		BUG();
	}

	SET_NETDEV_DEV(slave_dev, parent);
	slave_dev->dev.of_node = ds->pd->port_dn[port];
	slave_dev->vlan_features = master->vlan_features;

	p = netdev_priv(slave_dev);
	p->dev = slave_dev;
	p->parent = ds;
	p->port = port;

	p->old_pause = -1;
	p->old_link = -1;
	p->old_duplex = -1;

	dsa_slave_phy_setup(p, slave_dev);

	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, dev_name(&p->phy->dev),
			   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;
}
Commit	Line	Data
91da11f8 LB	1	/*
91da11f8 LB	2	* net/dsa/slave.c - Slave device handling
e84665c9	3	* Copyright (c) 2008-2009 Marvell Semiconductor
91da11f8 LB	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#include <linux/list.h>
	12	#include <linux/netdevice.h>
df02c6ff	13	#include <linux/etherdevice.h>
91da11f8	14	#include <linux/phy.h>
0d8bcdd3 FF	15	#include <linux/of_net.h>
0d8bcdd3 FF	16	#include <linux/of_mdio.h>
91da11f8 LB	17	#include "dsa_priv.h"
	18
	19	/* slave mii_bus handling ***************************************************/
	20	static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
	21	{
	22	struct dsa_switch *ds = bus->priv;
	23
0d8bcdd3	24	if (ds->phys_mii_mask & (1 << addr))
91da11f8 LB	25	return ds->drv->phy_read(ds, addr, reg);
	26
	27	return 0xffff;
	28	}
	29
	30	static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
	31	{
	32	struct dsa_switch *ds = bus->priv;
	33
0d8bcdd3	34	if (ds->phys_mii_mask & (1 << addr))
91da11f8 LB	35	return ds->drv->phy_write(ds, addr, reg, val);
	36
	37	return 0;
	38	}
	39
	40	void dsa_slave_mii_bus_init(struct dsa_switch *ds)
	41	{
	42	ds->slave_mii_bus->priv = (void *)ds;
	43	ds->slave_mii_bus->name = "dsa slave smi";
	44	ds->slave_mii_bus->read = dsa_slave_phy_read;
	45	ds->slave_mii_bus->write = dsa_slave_phy_write;
f490be04 FF	46	snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
f490be04 FF	47	ds->index, ds->pd->sw_addr);
e84665c9	48	ds->slave_mii_bus->parent = &ds->master_mii_bus->dev;
91da11f8 LB	49	}
	50
	51
	52	/* slave device handling ****************************************************/
c0840801 LB	53	static int dsa_slave_init(struct net_device *dev)
	54	{
	55	struct dsa_slave_priv *p = netdev_priv(dev);
c0840801	56
e84665c9	57	dev->iflink = p->parent->dst->master_netdev->ifindex;
c0840801 LB	58
	59	return 0;
	60	}
	61
91da11f8 LB	62	static int dsa_slave_open(struct net_device *dev)
91da11f8 LB	63	{
df02c6ff	64	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	65	struct net_device *master = p->parent->dst->master_netdev;
df02c6ff LB	66	int err;
	67
	68	if (!(master->flags & IFF_UP))
	69	return -ENETDOWN;
	70
8feedbb4	71	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
a748ee24	72	err = dev_uc_add(master, dev->dev_addr);
df02c6ff LB	73	if (err < 0)
	74	goto out;
	75	}
	76
	77	if (dev->flags & IFF_ALLMULTI) {
	78	err = dev_set_allmulti(master, 1);
	79	if (err < 0)
	80	goto del_unicast;
	81	}
	82	if (dev->flags & IFF_PROMISC) {
	83	err = dev_set_promiscuity(master, 1);
	84	if (err < 0)
	85	goto clear_allmulti;
	86	}
	87
91da11f8	88	return 0;
df02c6ff LB	89
	90	clear_allmulti:
	91	if (dev->flags & IFF_ALLMULTI)
	92	dev_set_allmulti(master, -1);
	93	del_unicast:
8feedbb4	94	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	95	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	96	out:
df02c6ff LB	97	return err;
91da11f8 LB	98	}
	99
	100	static int dsa_slave_close(struct net_device *dev)
	101	{
df02c6ff	102	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	103	struct net_device *master = p->parent->dst->master_netdev;
df02c6ff LB	104
df02c6ff LB	105	dev_mc_unsync(master, dev);
a748ee24	106	dev_uc_unsync(master, dev);
df02c6ff LB	107	if (dev->flags & IFF_ALLMULTI)
	108	dev_set_allmulti(master, -1);
	109	if (dev->flags & IFF_PROMISC)
	110	dev_set_promiscuity(master, -1);
	111
8feedbb4	112	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	113	dev_uc_del(master, dev->dev_addr);
df02c6ff	114
91da11f8 LB	115	return 0;
	116	}
	117
	118	static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
	119	{
	120	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	121	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	122
	123	if (change & IFF_ALLMULTI)
	124	dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
	125	if (change & IFF_PROMISC)
	126	dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
	127	}
	128
	129	static void dsa_slave_set_rx_mode(struct net_device *dev)
	130	{
	131	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	132	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	133
91da11f8 LB	134	dev_mc_sync(master, dev);
a748ee24	135	dev_uc_sync(master, dev);
91da11f8 LB	136	}
91da11f8 LB	137
df02c6ff	138	static int dsa_slave_set_mac_address(struct net_device dev, void a)
91da11f8	139	{
df02c6ff	140	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	141	struct net_device *master = p->parent->dst->master_netdev;
df02c6ff LB	142	struct sockaddr *addr = a;
	143	int err;
	144
	145	if (!is_valid_ether_addr(addr->sa_data))
	146	return -EADDRNOTAVAIL;
	147
	148	if (!(dev->flags & IFF_UP))
	149	goto out;
	150
8feedbb4	151	if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24	152	err = dev_uc_add(master, addr->sa_data);
df02c6ff LB	153	if (err < 0)
	154	return err;
	155	}
	156
8feedbb4	157	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	158	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	159
df02c6ff LB	160	out:
d08f161a	161	ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8 LB	162
	163	return 0;
	164	}
	165
	166	static int dsa_slave_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	167	{
	168	struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8 LB	169
91da11f8 LB	170	if (p->phy != NULL)
28b04113	171	return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8 LB	172
	173	return -EOPNOTSUPP;
	174	}
	175
3e8a72d1 FF	176	static netdev_tx_t dsa_slave_xmit(struct sk_buff skb, struct net_device dev)
	177	{
	178	struct dsa_slave_priv *p = netdev_priv(dev);
	179	struct dsa_switch_tree *dst = p->parent->dst;
	180
	181	return dst->ops->xmit(skb, dev);
	182	}
	183
91da11f8 LB	184
	185	/* ethtool operations *******************************************************/
	186	static int
	187	dsa_slave_get_settings(struct net_device dev, struct ethtool_cmd cmd)
	188	{
	189	struct dsa_slave_priv *p = netdev_priv(dev);
	190	int err;
	191
	192	err = -EOPNOTSUPP;
	193	if (p->phy != NULL) {
	194	err = phy_read_status(p->phy);
	195	if (err == 0)
	196	err = phy_ethtool_gset(p->phy, cmd);
	197	}
	198
	199	return err;
	200	}
	201
	202	static int
	203	dsa_slave_set_settings(struct net_device dev, struct ethtool_cmd cmd)
	204	{
	205	struct dsa_slave_priv *p = netdev_priv(dev);
	206
	207	if (p->phy != NULL)
	208	return phy_ethtool_sset(p->phy, cmd);
	209
	210	return -EOPNOTSUPP;
	211	}
	212
	213	static void dsa_slave_get_drvinfo(struct net_device *dev,
	214	struct ethtool_drvinfo *drvinfo)
	215	{
7826d43f JP	216	strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
	217	strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
	218	strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
	219	strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8 LB	220	}
	221
	222	static int dsa_slave_nway_reset(struct net_device *dev)
	223	{
	224	struct dsa_slave_priv *p = netdev_priv(dev);
	225
	226	if (p->phy != NULL)
	227	return genphy_restart_aneg(p->phy);
	228
	229	return -EOPNOTSUPP;
	230	}
	231
	232	static u32 dsa_slave_get_link(struct net_device *dev)
	233	{
	234	struct dsa_slave_priv *p = netdev_priv(dev);
	235
	236	if (p->phy != NULL) {
	237	genphy_update_link(p->phy);
	238	return p->phy->link;
	239	}
	240
	241	return -EOPNOTSUPP;
	242	}
	243
	244	static void dsa_slave_get_strings(struct net_device *dev,
	245	uint32_t stringset, uint8_t *data)
	246	{
	247	struct dsa_slave_priv *p = netdev_priv(dev);
	248	struct dsa_switch *ds = p->parent;
	249
	250	if (stringset == ETH_SS_STATS) {
	251	int len = ETH_GSTRING_LEN;
	252
	253	strncpy(data, "tx_packets", len);
	254	strncpy(data + len, "tx_bytes", len);
	255	strncpy(data + 2 * len, "rx_packets", len);
	256	strncpy(data + 3 * len, "rx_bytes", len);
	257	if (ds->drv->get_strings != NULL)
	258	ds->drv->get_strings(ds, p->port, data + 4 * len);
	259	}
	260	}
	261
	262	static void dsa_slave_get_ethtool_stats(struct net_device *dev,
	263	struct ethtool_stats *stats,
	264	uint64_t *data)
	265	{
	266	struct dsa_slave_priv *p = netdev_priv(dev);
	267	struct dsa_switch *ds = p->parent;
	268
	269	data[0] = p->dev->stats.tx_packets;
	270	data[1] = p->dev->stats.tx_bytes;
	271	data[2] = p->dev->stats.rx_packets;
	272	data[3] = p->dev->stats.rx_bytes;
	273	if (ds->drv->get_ethtool_stats != NULL)
	274	ds->drv->get_ethtool_stats(ds, p->port, data + 4);
	275	}
	276
	277	static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
	278	{
	279	struct dsa_slave_priv *p = netdev_priv(dev);
	280	struct dsa_switch *ds = p->parent;
	281
	282	if (sset == ETH_SS_STATS) {
	283	int count;
284
285	count = 4;
286	if (ds->drv->get_sset_count != NULL)
287	count += ds->drv->get_sset_count(ds);
288
289	return count;
290	}
291
292	return -EOPNOTSUPP;
293	}
294
295	static const struct ethtool_ops dsa_slave_ethtool_ops = {
296	.get_settings = dsa_slave_get_settings,
297	.set_settings = dsa_slave_set_settings,
298	.get_drvinfo = dsa_slave_get_drvinfo,
299	.nway_reset = dsa_slave_nway_reset,
300	.get_link = dsa_slave_get_link,
91da11f8 LB	301	.get_strings = dsa_slave_get_strings,
	302	.get_ethtool_stats = dsa_slave_get_ethtool_stats,
	303	.get_sset_count = dsa_slave_get_sset_count,
	304	};
	305
3e8a72d1	306	static const struct net_device_ops dsa_slave_netdev_ops = {
c0840801	307	.ndo_init = dsa_slave_init,
d442ad4a SH	308	.ndo_open = dsa_slave_open,
d442ad4a SH	309	.ndo_stop = dsa_slave_close,
3e8a72d1	310	.ndo_start_xmit = dsa_slave_xmit,
d442ad4a SH	311	.ndo_change_rx_flags = dsa_slave_change_rx_flags,
d442ad4a SH	312	.ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a SH	313	.ndo_set_mac_address = dsa_slave_set_mac_address,
	314	.ndo_do_ioctl = dsa_slave_ioctl,
	315	};
91da11f8	316
0d8bcdd3 FF	317	static void dsa_slave_adjust_link(struct net_device *dev)
	318	{
	319	struct dsa_slave_priv *p = netdev_priv(dev);
	320	unsigned int status_changed = 0;
	321
	322	if (p->old_link != p->phy->link) {
	323	status_changed = 1;
	324	p->old_link = p->phy->link;
	325	}
	326
	327	if (p->old_duplex != p->phy->duplex) {
	328	status_changed = 1;
	329	p->old_duplex = p->phy->duplex;
	330	}
	331
	332	if (p->old_pause != p->phy->pause) {
	333	status_changed = 1;
	334	p->old_pause = p->phy->pause;
	335	}
	336
	337	if (status_changed)
	338	phy_print_status(p->phy);
	339	}
	340
91da11f8	341	/* slave device setup *******************************************************/
0d8bcdd3 FF	342	static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
	343	struct net_device *slave_dev)
	344	{
	345	struct dsa_switch *ds = p->parent;
	346	struct dsa_chip_data *cd = ds->pd;
	347	struct device_node phy_dn, port_dn;
	348	int ret;
	349
	350	port_dn = cd->port_dn[p->port];
	351	p->phy_interface = of_get_phy_mode(port_dn);
	352
	353	phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
	354	if (of_phy_is_fixed_link(port_dn)) {
	355	/* In the case of a fixed PHY, the DT node associated
	356	* to the fixed PHY is the Port DT node
	357	*/
	358	ret = of_phy_register_fixed_link(port_dn);
	359	if (ret) {
	360	pr_err("failed to register fixed PHY\n");
	361	return;
	362	}
	363	phy_dn = port_dn;
	364	}
	365
	366	if (phy_dn)
	367	p->phy = of_phy_connect(slave_dev, phy_dn,
	368	dsa_slave_adjust_link, 0,
	369	p->phy_interface);
	370
	371	/* We could not connect to a designated PHY, so use the switch internal
	372	* MDIO bus instead
	373	*/
	374	if (!p->phy)
	375	p->phy = ds->slave_mii_bus->phy_map[p->port];
	376	else
	377	pr_info("attached PHY at address %d [%s]\n",
	378	p->phy->addr, p->phy->drv->name);
	379	}
	380
91da11f8 LB	381	struct net_device *
	382	dsa_slave_create(struct dsa_switch ds, struct device parent,
	383	int port, char *name)
	384	{
e84665c9	385	struct net_device *master = ds->dst->master_netdev;
91da11f8 LB	386	struct net_device *slave_dev;
	387	struct dsa_slave_priv *p;
	388	int ret;
	389
c835a677 TG	390	slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
c835a677 TG	391	NET_NAME_UNKNOWN, ether_setup);
91da11f8 LB	392	if (slave_dev == NULL)
	393	return slave_dev;
	394
	395	slave_dev->features = master->vlan_features;
7ad24ea4	396	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005	397	eth_hw_addr_inherit(slave_dev, master);
91da11f8	398	slave_dev->tx_queue_len = 0;
3e8a72d1	399	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
d442ad4a	400
e84665c9	401	switch (ds->dst->tag_protocol) {
cf85d08f LB	402	#ifdef CONFIG_NET_DSA_TAG_DSA
cf85d08f LB	403	case htons(ETH_P_DSA):
3e8a72d1	404	ds->dst->ops = &dsa_netdev_ops;
cf85d08f LB	405	break;
cf85d08f LB	406	#endif
91da11f8 LB	407	#ifdef CONFIG_NET_DSA_TAG_EDSA
91da11f8 LB	408	case htons(ETH_P_EDSA):
3e8a72d1	409	ds->dst->ops = &edsa_netdev_ops;
91da11f8	410	break;
396138f0 LB	411	#endif
	412	#ifdef CONFIG_NET_DSA_TAG_TRAILER
	413	case htons(ETH_P_TRAILER):
3e8a72d1	414	ds->dst->ops = &trailer_netdev_ops;
396138f0	415	break;
91da11f8 LB	416	#endif
	417	default:
	418	BUG();
	419	}
d442ad4a	420
91da11f8	421	SET_NETDEV_DEV(slave_dev, parent);
bd47497a	422	slave_dev->dev.of_node = ds->pd->port_dn[port];
91da11f8 LB	423	slave_dev->vlan_features = master->vlan_features;
	424
	425	p = netdev_priv(slave_dev);
	426	p->dev = slave_dev;
	427	p->parent = ds;
	428	p->port = port;
0d8bcdd3 FF	429
	430	p->old_pause = -1;
	431	p->old_link = -1;
	432	p->old_duplex = -1;
	433
	434	dsa_slave_phy_setup(p, slave_dev);
91da11f8 LB	435
	436	ret = register_netdev(slave_dev);
	437	if (ret) {
	438	printk(KERN_ERR "%s: error %d registering interface %s\n",
	439	master->name, ret, slave_dev->name);
	440	free_netdev(slave_dev);
	441	return NULL;
	442	}
	443
	444	netif_carrier_off(slave_dev);
	445
	446	if (p->phy != NULL) {
fb28ad35	447	phy_attach(slave_dev, dev_name(&p->phy->dev),
f9a8f83b	448	PHY_INTERFACE_MODE_GMII);
91da11f8 LB	449
	450	p->phy->autoneg = AUTONEG_ENABLE;
	451	p->phy->speed = 0;
	452	p->phy->duplex = 0;
	453	p->phy->advertising = p->phy->supported \| ADVERTISED_Autoneg;
	454	phy_start_aneg(p->phy);
	455	}
	456
	457	return slave_dev;
	458	}