[mirror_ubuntu-jammy-kernel.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/etherdevice.h>
#include <linux/phy.h>
#include <linux/phy_fixed.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_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;
	struct dsa_switch *ds = p->parent;
	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;
	}

	if (ds->drv->port_enable) {
		err = ds->drv->port_enable(ds, p->port, p->phy);
		if (err)
			goto clear_promisc;
	}

	if (p->phy)
		phy_start(p->phy);

	return 0;

clear_promisc:
	if (dev->flags & IFF_PROMISC)
		dev_set_promiscuity(master, 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;
	struct dsa_switch *ds = p->parent;

	if (p->phy)
		phy_stop(p->phy);

	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);

	if (ds->drv->port_disable)
		ds->drv->port_disable(ds, p->port, p->phy);

	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);

	return p->xmit(skb, dev);
}

static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
					struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);

	skb->dev = p->parent->dst->master_netdev;
	dev_queue_xmit(skb);

	return NETDEV_TX_OK;
}


/* 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 void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;

	if (ds->drv->get_wol)
		ds->drv->get_wol(ds, p->port, w);
}

static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;
	int ret = -EOPNOTSUPP;

	if (ds->drv->set_wol)
		ret = ds->drv->set_wol(ds, p->port, w);

	return ret;
}

static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;
	int ret;

	if (!ds->drv->set_eee)
		return -EOPNOTSUPP;

	ret = ds->drv->set_eee(ds, p->port, p->phy, e);
	if (ret)
		return ret;

	if (p->phy)
		ret = phy_ethtool_set_eee(p->phy, e);

	return ret;
}

static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;
	int ret;

	if (!ds->drv->get_eee)
		return -EOPNOTSUPP;

	ret = ds->drv->get_eee(ds, p->port, e);
	if (ret)
		return ret;

	if (p->phy)
		ret = phy_ethtool_get_eee(p->phy, e);

	return ret;
}

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,
	.set_wol		= dsa_slave_set_wol,
	.get_wol		= dsa_slave_get_wol,
	.set_eee		= dsa_slave_set_eee,
	.get_eee		= dsa_slave_get_eee,
};

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);
	struct dsa_switch *ds = p->parent;
	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 (ds->drv->adjust_link && status_changed)
		ds->drv->adjust_link(ds, p->port, p->phy);

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

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

	if (ds->drv->fixed_link_update)
		ds->drv->fixed_link_update(ds, p->port, status);

	return 0;
}

/* 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;
	bool phy_is_fixed = false;
	u32 phy_flags = 0;
	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_is_fixed = true;
		phy_dn = port_dn;
	}

	if (ds->drv->get_phy_flags)
		phy_flags = ds->drv->get_phy_flags(ds, p->port);

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

	if (p->phy && phy_is_fixed)
		fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);

	/* 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);
}

int dsa_slave_suspend(struct net_device *slave_dev)
{
	struct dsa_slave_priv *p = netdev_priv(slave_dev);

	netif_device_detach(slave_dev);

	if (p->phy) {
		phy_stop(p->phy);
		p->old_pause = -1;
		p->old_link = -1;
		p->old_duplex = -1;
		phy_suspend(p->phy);
	}

	return 0;
}

int dsa_slave_resume(struct net_device *slave_dev)
{
	struct dsa_slave_priv *p = netdev_priv(slave_dev);

	netif_device_attach(slave_dev);

	if (p->phy) {
		phy_resume(p->phy);
		phy_start(p->phy);
	}

	return 0;
}

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;

	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;

	switch (ds->dst->tag_protocol) {
#ifdef CONFIG_NET_DSA_TAG_DSA
	case DSA_TAG_PROTO_DSA:
		p->xmit = dsa_netdev_ops.xmit;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
	case DSA_TAG_PROTO_EDSA:
		p->xmit = edsa_netdev_ops.xmit;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
	case DSA_TAG_PROTO_TRAILER:
		p->xmit = trailer_netdev_ops.xmit;
		break;
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
	case DSA_TAG_PROTO_BRCM:
		p->xmit = brcm_netdev_ops.xmit;
		break;
#endif
	default:
		p->xmit	= dsa_slave_notag_xmit;
		break;
	}

	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) {
		if (ds->drv->get_phy_flags)
			p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);

		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;
	}

	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>
df02c6ff	12	#include <linux/etherdevice.h>
91da11f8	13	#include <linux/phy.h>
a2820543	14	#include <linux/phy_fixed.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);
b4d2394d	48	ds->slave_mii_bus->parent = ds->master_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;
b2f2af21	66	struct dsa_switch *ds = p->parent;
df02c6ff LB	67	int err;
	68
	69	if (!(master->flags & IFF_UP))
	70	return -ENETDOWN;
	71
8feedbb4	72	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
a748ee24	73	err = dev_uc_add(master, dev->dev_addr);
df02c6ff LB	74	if (err < 0)
	75	goto out;
	76	}
	77
	78	if (dev->flags & IFF_ALLMULTI) {
	79	err = dev_set_allmulti(master, 1);
	80	if (err < 0)
	81	goto del_unicast;
	82	}
	83	if (dev->flags & IFF_PROMISC) {
	84	err = dev_set_promiscuity(master, 1);
	85	if (err < 0)
	86	goto clear_allmulti;
	87	}
	88
b2f2af21 FF	89	if (ds->drv->port_enable) {
	90	err = ds->drv->port_enable(ds, p->port, p->phy);
	91	if (err)
	92	goto clear_promisc;
	93	}
	94
f7f1de51 FF	95	if (p->phy)
	96	phy_start(p->phy);
	97
91da11f8	98	return 0;
df02c6ff	99
b2f2af21 FF	100	clear_promisc:
	101	if (dev->flags & IFF_PROMISC)
	102	dev_set_promiscuity(master, 0);
df02c6ff LB	103	clear_allmulti:
	104	if (dev->flags & IFF_ALLMULTI)
	105	dev_set_allmulti(master, -1);
	106	del_unicast:
8feedbb4	107	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	108	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	109	out:
df02c6ff LB	110	return err;
91da11f8 LB	111	}
	112
	113	static int dsa_slave_close(struct net_device *dev)
	114	{
df02c6ff	115	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	116	struct net_device *master = p->parent->dst->master_netdev;
b2f2af21	117	struct dsa_switch *ds = p->parent;
df02c6ff	118
f7f1de51 FF	119	if (p->phy)
	120	phy_stop(p->phy);
	121
df02c6ff	122	dev_mc_unsync(master, dev);
a748ee24	123	dev_uc_unsync(master, dev);
df02c6ff LB	124	if (dev->flags & IFF_ALLMULTI)
	125	dev_set_allmulti(master, -1);
	126	if (dev->flags & IFF_PROMISC)
	127	dev_set_promiscuity(master, -1);
	128
8feedbb4	129	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	130	dev_uc_del(master, dev->dev_addr);
df02c6ff	131
b2f2af21 FF	132	if (ds->drv->port_disable)
	133	ds->drv->port_disable(ds, p->port, p->phy);
	134
91da11f8 LB	135	return 0;
	136	}
	137
	138	static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
	139	{
	140	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	141	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	142
	143	if (change & IFF_ALLMULTI)
	144	dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
	145	if (change & IFF_PROMISC)
	146	dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
	147	}
	148
	149	static void dsa_slave_set_rx_mode(struct net_device *dev)
	150	{
	151	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	152	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	153
91da11f8 LB	154	dev_mc_sync(master, dev);
a748ee24	155	dev_uc_sync(master, dev);
91da11f8 LB	156	}
91da11f8 LB	157
df02c6ff	158	static int dsa_slave_set_mac_address(struct net_device dev, void a)
91da11f8	159	{
df02c6ff	160	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	161	struct net_device *master = p->parent->dst->master_netdev;
df02c6ff LB	162	struct sockaddr *addr = a;
	163	int err;
	164
	165	if (!is_valid_ether_addr(addr->sa_data))
	166	return -EADDRNOTAVAIL;
	167
	168	if (!(dev->flags & IFF_UP))
	169	goto out;
	170
8feedbb4	171	if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24	172	err = dev_uc_add(master, addr->sa_data);
df02c6ff LB	173	if (err < 0)
	174	return err;
	175	}
	176
8feedbb4	177	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	178	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	179
df02c6ff LB	180	out:
d08f161a	181	ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8 LB	182
	183	return 0;
	184	}
	185
	186	static int dsa_slave_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	187	{
	188	struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8 LB	189
91da11f8 LB	190	if (p->phy != NULL)
28b04113	191	return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8 LB	192
	193	return -EOPNOTSUPP;
	194	}
	195
3e8a72d1 FF	196	static netdev_tx_t dsa_slave_xmit(struct sk_buff skb, struct net_device dev)
	197	{
	198	struct dsa_slave_priv *p = netdev_priv(dev);
3e8a72d1	199
5075314e	200	return p->xmit(skb, dev);
3e8a72d1 FF	201	}
3e8a72d1 FF	202
5aed85ce FF	203	static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
	204	struct net_device *dev)
	205	{
	206	struct dsa_slave_priv *p = netdev_priv(dev);
	207
	208	skb->dev = p->parent->dst->master_netdev;
	209	dev_queue_xmit(skb);
	210
	211	return NETDEV_TX_OK;
	212	}
	213
91da11f8 LB	214
	215	/* ethtool operations *******************************************************/
	216	static int
	217	dsa_slave_get_settings(struct net_device dev, struct ethtool_cmd cmd)
	218	{
	219	struct dsa_slave_priv *p = netdev_priv(dev);
	220	int err;
	221
	222	err = -EOPNOTSUPP;
	223	if (p->phy != NULL) {
	224	err = phy_read_status(p->phy);
	225	if (err == 0)
	226	err = phy_ethtool_gset(p->phy, cmd);
	227	}
	228
	229	return err;
	230	}
	231
	232	static int
	233	dsa_slave_set_settings(struct net_device dev, struct ethtool_cmd cmd)
	234	{
	235	struct dsa_slave_priv *p = netdev_priv(dev);
	236
	237	if (p->phy != NULL)
	238	return phy_ethtool_sset(p->phy, cmd);
	239
	240	return -EOPNOTSUPP;
	241	}
	242
	243	static void dsa_slave_get_drvinfo(struct net_device *dev,
	244	struct ethtool_drvinfo *drvinfo)
	245	{
7826d43f JP	246	strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
	247	strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
	248	strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
	249	strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8 LB	250	}
	251
	252	static int dsa_slave_nway_reset(struct net_device *dev)
	253	{
	254	struct dsa_slave_priv *p = netdev_priv(dev);
	255
	256	if (p->phy != NULL)
	257	return genphy_restart_aneg(p->phy);
	258
	259	return -EOPNOTSUPP;
	260	}
	261
	262	static u32 dsa_slave_get_link(struct net_device *dev)
	263	{
	264	struct dsa_slave_priv *p = netdev_priv(dev);
	265
	266	if (p->phy != NULL) {
	267	genphy_update_link(p->phy);
	268	return p->phy->link;
	269	}
	270
	271	return -EOPNOTSUPP;
	272	}
	273
	274	static void dsa_slave_get_strings(struct net_device *dev,
	275	uint32_t stringset, uint8_t *data)
	276	{
	277	struct dsa_slave_priv *p = netdev_priv(dev);
	278	struct dsa_switch *ds = p->parent;
	279
	280	if (stringset == ETH_SS_STATS) {
	281	int len = ETH_GSTRING_LEN;
	282
	283	strncpy(data, "tx_packets", len);
	284	strncpy(data + len, "tx_bytes", len);
	285	strncpy(data + 2 * len, "rx_packets", len);
	286	strncpy(data + 3 * len, "rx_bytes", len);
	287	if (ds->drv->get_strings != NULL)
	288	ds->drv->get_strings(ds, p->port, data + 4 * len);
	289	}
	290	}
	291
	292	static void dsa_slave_get_ethtool_stats(struct net_device *dev,
	293	struct ethtool_stats *stats,
	294	uint64_t *data)
	295	{
	296	struct dsa_slave_priv *p = netdev_priv(dev);
	297	struct dsa_switch *ds = p->parent;
	298
	299	data[0] = p->dev->stats.tx_packets;
	300	data[1] = p->dev->stats.tx_bytes;
	301	data[2] = p->dev->stats.rx_packets;
	302	data[3] = p->dev->stats.rx_bytes;
	303	if (ds->drv->get_ethtool_stats != NULL)
	304	ds->drv->get_ethtool_stats(ds, p->port, data + 4);
	305	}
	306
	307	static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
	308	{
	309	struct dsa_slave_priv *p = netdev_priv(dev);
	310	struct dsa_switch *ds = p->parent;
	311
	312	if (sset == ETH_SS_STATS) {
	313	int count;
314
315	count = 4;
316	if (ds->drv->get_sset_count != NULL)
317	count += ds->drv->get_sset_count(ds);
318
319	return count;
320	}
321
322	return -EOPNOTSUPP;
323	}
324
19e57c4e FF	325	static void dsa_slave_get_wol(struct net_device dev, struct ethtool_wolinfo w)
	326	{
	327	struct dsa_slave_priv *p = netdev_priv(dev);
	328	struct dsa_switch *ds = p->parent;
	329
	330	if (ds->drv->get_wol)
	331	ds->drv->get_wol(ds, p->port, w);
	332	}
	333
	334	static int dsa_slave_set_wol(struct net_device dev, struct ethtool_wolinfo w)
	335	{
	336	struct dsa_slave_priv *p = netdev_priv(dev);
	337	struct dsa_switch *ds = p->parent;
	338	int ret = -EOPNOTSUPP;
	339
	340	if (ds->drv->set_wol)
	341	ret = ds->drv->set_wol(ds, p->port, w);
	342
	343	return ret;
	344	}
	345
7905288f FF	346	static int dsa_slave_set_eee(struct net_device dev, struct ethtool_eee e)
	347	{
	348	struct dsa_slave_priv *p = netdev_priv(dev);
	349	struct dsa_switch *ds = p->parent;
	350	int ret;
	351
	352	if (!ds->drv->set_eee)
	353	return -EOPNOTSUPP;
	354
	355	ret = ds->drv->set_eee(ds, p->port, p->phy, e);
	356	if (ret)
	357	return ret;
	358
	359	if (p->phy)
	360	ret = phy_ethtool_set_eee(p->phy, e);
	361
	362	return ret;
	363	}
	364
	365	static int dsa_slave_get_eee(struct net_device dev, struct ethtool_eee e)
	366	{
	367	struct dsa_slave_priv *p = netdev_priv(dev);
	368	struct dsa_switch *ds = p->parent;
	369	int ret;
	370
	371	if (!ds->drv->get_eee)
	372	return -EOPNOTSUPP;
	373
	374	ret = ds->drv->get_eee(ds, p->port, e);
	375	if (ret)
	376	return ret;
	377
	378	if (p->phy)
	379	ret = phy_ethtool_get_eee(p->phy, e);
	380
	381	return ret;
	382	}
	383
91da11f8 LB	384	static const struct ethtool_ops dsa_slave_ethtool_ops = {
	385	.get_settings = dsa_slave_get_settings,
	386	.set_settings = dsa_slave_set_settings,
	387	.get_drvinfo = dsa_slave_get_drvinfo,
	388	.nway_reset = dsa_slave_nway_reset,
	389	.get_link = dsa_slave_get_link,
91da11f8 LB	390	.get_strings = dsa_slave_get_strings,
	391	.get_ethtool_stats = dsa_slave_get_ethtool_stats,
	392	.get_sset_count = dsa_slave_get_sset_count,
19e57c4e FF	393	.set_wol = dsa_slave_set_wol,
19e57c4e FF	394	.get_wol = dsa_slave_get_wol,
7905288f FF	395	.set_eee = dsa_slave_set_eee,
7905288f FF	396	.get_eee = dsa_slave_get_eee,
91da11f8 LB	397	};
91da11f8 LB	398
3e8a72d1	399	static const struct net_device_ops dsa_slave_netdev_ops = {
c0840801	400	.ndo_init = dsa_slave_init,
d442ad4a SH	401	.ndo_open = dsa_slave_open,
d442ad4a SH	402	.ndo_stop = dsa_slave_close,
3e8a72d1	403	.ndo_start_xmit = dsa_slave_xmit,
d442ad4a SH	404	.ndo_change_rx_flags = dsa_slave_change_rx_flags,
d442ad4a SH	405	.ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a SH	406	.ndo_set_mac_address = dsa_slave_set_mac_address,
	407	.ndo_do_ioctl = dsa_slave_ioctl,
	408	};
91da11f8	409
0d8bcdd3 FF	410	static void dsa_slave_adjust_link(struct net_device *dev)
	411	{
	412	struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba	413	struct dsa_switch *ds = p->parent;
0d8bcdd3 FF	414	unsigned int status_changed = 0;
	415
	416	if (p->old_link != p->phy->link) {
	417	status_changed = 1;
	418	p->old_link = p->phy->link;
	419	}
	420
	421	if (p->old_duplex != p->phy->duplex) {
	422	status_changed = 1;
	423	p->old_duplex = p->phy->duplex;
	424	}
	425
	426	if (p->old_pause != p->phy->pause) {
	427	status_changed = 1;
	428	p->old_pause = p->phy->pause;
	429	}
	430
ec9436ba FF	431	if (ds->drv->adjust_link && status_changed)
	432	ds->drv->adjust_link(ds, p->port, p->phy);
	433
0d8bcdd3 FF	434	if (status_changed)
	435	phy_print_status(p->phy);
	436	}
	437
ce31b31c FF	438	static int dsa_slave_fixed_link_update(struct net_device *dev,
	439	struct fixed_phy_status *status)
	440	{
	441	struct dsa_slave_priv *p = netdev_priv(dev);
	442	struct dsa_switch *ds = p->parent;
	443
	444	if (ds->drv->fixed_link_update)
	445	ds->drv->fixed_link_update(ds, p->port, status);
	446
	447	return 0;
	448	}
	449
91da11f8	450	/* slave device setup *******************************************************/
0d8bcdd3 FF	451	static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
	452	struct net_device *slave_dev)
	453	{
	454	struct dsa_switch *ds = p->parent;
	455	struct dsa_chip_data *cd = ds->pd;
	456	struct device_node phy_dn, port_dn;
ce31b31c	457	bool phy_is_fixed = false;
6819563e	458	u32 phy_flags = 0;
0d8bcdd3 FF	459	int ret;
	460
	461	port_dn = cd->port_dn[p->port];
	462	p->phy_interface = of_get_phy_mode(port_dn);
	463
	464	phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
	465	if (of_phy_is_fixed_link(port_dn)) {
	466	/* In the case of a fixed PHY, the DT node associated
	467	* to the fixed PHY is the Port DT node
	468	*/
	469	ret = of_phy_register_fixed_link(port_dn);
	470	if (ret) {
	471	pr_err("failed to register fixed PHY\n");
	472	return;
	473	}
ce31b31c	474	phy_is_fixed = true;
0d8bcdd3 FF	475	phy_dn = port_dn;
	476	}
	477
6819563e FF	478	if (ds->drv->get_phy_flags)
	479	phy_flags = ds->drv->get_phy_flags(ds, p->port);
	480
0d8bcdd3 FF	481	if (phy_dn)
0d8bcdd3 FF	482	p->phy = of_phy_connect(slave_dev, phy_dn,
6819563e	483	dsa_slave_adjust_link, phy_flags,
0d8bcdd3 FF	484	p->phy_interface);
0d8bcdd3 FF	485
ce31b31c FF	486	if (p->phy && phy_is_fixed)
	487	fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
	488
0d8bcdd3 FF	489	/* We could not connect to a designated PHY, so use the switch internal
	490	* MDIO bus instead
	491	*/
	492	if (!p->phy)
	493	p->phy = ds->slave_mii_bus->phy_map[p->port];
	494	else
	495	pr_info("attached PHY at address %d [%s]\n",
	496	p->phy->addr, p->phy->drv->name);
	497	}
	498
24462549 FF	499	int dsa_slave_suspend(struct net_device *slave_dev)
	500	{
	501	struct dsa_slave_priv *p = netdev_priv(slave_dev);
	502
	503	netif_device_detach(slave_dev);
	504
	505	if (p->phy) {
	506	phy_stop(p->phy);
	507	p->old_pause = -1;
	508	p->old_link = -1;
	509	p->old_duplex = -1;
	510	phy_suspend(p->phy);
	511	}
	512
	513	return 0;
	514	}
	515
	516	int dsa_slave_resume(struct net_device *slave_dev)
	517	{
	518	struct dsa_slave_priv *p = netdev_priv(slave_dev);
	519
	520	netif_device_attach(slave_dev);
	521
	522	if (p->phy) {
	523	phy_resume(p->phy);
	524	phy_start(p->phy);
	525	}
	526
	527	return 0;
	528	}
	529
91da11f8 LB	530	struct net_device *
	531	dsa_slave_create(struct dsa_switch ds, struct device parent,
	532	int port, char *name)
	533	{
e84665c9	534	struct net_device *master = ds->dst->master_netdev;
91da11f8 LB	535	struct net_device *slave_dev;
	536	struct dsa_slave_priv *p;
	537	int ret;
	538
c835a677 TG	539	slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
c835a677 TG	540	NET_NAME_UNKNOWN, ether_setup);
91da11f8 LB	541	if (slave_dev == NULL)
	542	return slave_dev;
	543
	544	slave_dev->features = master->vlan_features;
7ad24ea4	545	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005	546	eth_hw_addr_inherit(slave_dev, master);
91da11f8	547	slave_dev->tx_queue_len = 0;
3e8a72d1	548	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
d442ad4a	549
5075314e AD	550	SET_NETDEV_DEV(slave_dev, parent);
	551	slave_dev->dev.of_node = ds->pd->port_dn[port];
	552	slave_dev->vlan_features = master->vlan_features;
	553
	554	p = netdev_priv(slave_dev);
	555	p->dev = slave_dev;
	556	p->parent = ds;
	557	p->port = port;
	558
e84665c9	559	switch (ds->dst->tag_protocol) {
cf85d08f	560	#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3	561	case DSA_TAG_PROTO_DSA:
5075314e	562	p->xmit = dsa_netdev_ops.xmit;
cf85d08f LB	563	break;
cf85d08f LB	564	#endif
91da11f8	565	#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3	566	case DSA_TAG_PROTO_EDSA:
5075314e	567	p->xmit = edsa_netdev_ops.xmit;
91da11f8	568	break;
396138f0 LB	569	#endif
396138f0 LB	570	#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3	571	case DSA_TAG_PROTO_TRAILER:
5075314e	572	p->xmit = trailer_netdev_ops.xmit;
396138f0	573	break;
5037d532 FF	574	#endif
5037d532 FF	575	#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3	576	case DSA_TAG_PROTO_BRCM:
5075314e	577	p->xmit = brcm_netdev_ops.xmit;
5037d532	578	break;
91da11f8 LB	579	#endif
91da11f8 LB	580	default:
5075314e	581	p->xmit = dsa_slave_notag_xmit;
5aed85ce	582	break;
91da11f8	583	}
d442ad4a	584
0d8bcdd3 FF	585	p->old_pause = -1;
	586	p->old_link = -1;
	587	p->old_duplex = -1;
	588
	589	dsa_slave_phy_setup(p, slave_dev);
91da11f8 LB	590
	591	ret = register_netdev(slave_dev);
	592	if (ret) {
	593	printk(KERN_ERR "%s: error %d registering interface %s\n",
	594	master->name, ret, slave_dev->name);
	595	free_netdev(slave_dev);
	596	return NULL;
	597	}
	598
	599	netif_carrier_off(slave_dev);
	600
	601	if (p->phy != NULL) {
228b16cb	602	if (ds->drv->get_phy_flags)
6819563e FF	603	p->phy->dev_flags \|= ds->drv->get_phy_flags(ds, port);
6819563e FF	604
fb28ad35	605	phy_attach(slave_dev, dev_name(&p->phy->dev),
f9a8f83b	606	PHY_INTERFACE_MODE_GMII);
91da11f8 LB	607
	608	p->phy->autoneg = AUTONEG_ENABLE;
	609	p->phy->speed = 0;
	610	p->phy->duplex = 0;
	611	p->phy->advertising = p->phy->supported \| ADVERTISED_Autoneg;
91da11f8 LB	612	}
	613
	614	return slave_dev;
	615	}