[mirror_ubuntu-focal-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/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 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,
};

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(ds, port))
			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;
		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>
df02c6ff	12	#include <linux/etherdevice.h>
91da11f8	13	#include <linux/phy.h>
0d8bcdd3 FF	14	#include <linux/of_net.h>
0d8bcdd3 FF	15	#include <linux/of_mdio.h>
91da11f8 LB	16	#include "dsa_priv.h"
	17
	18	/* slave mii_bus handling ***************************************************/
	19	static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
	20	{
	21	struct dsa_switch *ds = bus->priv;
	22
0d8bcdd3	23	if (ds->phys_mii_mask & (1 << addr))
91da11f8 LB	24	return ds->drv->phy_read(ds, addr, reg);
	25
	26	return 0xffff;
	27	}
	28
	29	static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
	30	{
	31	struct dsa_switch *ds = bus->priv;
	32
0d8bcdd3	33	if (ds->phys_mii_mask & (1 << addr))
91da11f8 LB	34	return ds->drv->phy_write(ds, addr, reg, val);
	35
	36	return 0;
	37	}
	38
	39	void dsa_slave_mii_bus_init(struct dsa_switch *ds)
	40	{
	41	ds->slave_mii_bus->priv = (void *)ds;
	42	ds->slave_mii_bus->name = "dsa slave smi";
	43	ds->slave_mii_bus->read = dsa_slave_phy_read;
	44	ds->slave_mii_bus->write = dsa_slave_phy_write;
f490be04 FF	45	snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
f490be04 FF	46	ds->index, ds->pd->sw_addr);
b4d2394d	47	ds->slave_mii_bus->parent = ds->master_dev;
91da11f8 LB	48	}
	49
	50
	51	/* slave device handling ****************************************************/
c0840801 LB	52	static int dsa_slave_init(struct net_device *dev)
	53	{
	54	struct dsa_slave_priv *p = netdev_priv(dev);
c0840801	55
e84665c9	56	dev->iflink = p->parent->dst->master_netdev->ifindex;
c0840801 LB	57
	58	return 0;
	59	}
	60
91da11f8 LB	61	static int dsa_slave_open(struct net_device *dev)
91da11f8 LB	62	{
df02c6ff	63	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	64	struct net_device *master = p->parent->dst->master_netdev;
b2f2af21	65	struct dsa_switch *ds = p->parent;
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
b2f2af21 FF	88	if (ds->drv->port_enable) {
	89	err = ds->drv->port_enable(ds, p->port, p->phy);
	90	if (err)
	91	goto clear_promisc;
	92	}
	93
f7f1de51 FF	94	if (p->phy)
	95	phy_start(p->phy);
	96
91da11f8	97	return 0;
df02c6ff	98
b2f2af21 FF	99	clear_promisc:
	100	if (dev->flags & IFF_PROMISC)
	101	dev_set_promiscuity(master, 0);
df02c6ff LB	102	clear_allmulti:
	103	if (dev->flags & IFF_ALLMULTI)
	104	dev_set_allmulti(master, -1);
	105	del_unicast:
8feedbb4	106	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	107	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	108	out:
df02c6ff LB	109	return err;
91da11f8 LB	110	}
	111
	112	static int dsa_slave_close(struct net_device *dev)
	113	{
df02c6ff	114	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	115	struct net_device *master = p->parent->dst->master_netdev;
b2f2af21	116	struct dsa_switch *ds = p->parent;
df02c6ff	117
f7f1de51 FF	118	if (p->phy)
	119	phy_stop(p->phy);
	120
df02c6ff	121	dev_mc_unsync(master, dev);
a748ee24	122	dev_uc_unsync(master, dev);
df02c6ff LB	123	if (dev->flags & IFF_ALLMULTI)
	124	dev_set_allmulti(master, -1);
	125	if (dev->flags & IFF_PROMISC)
	126	dev_set_promiscuity(master, -1);
	127
8feedbb4	128	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	129	dev_uc_del(master, dev->dev_addr);
df02c6ff	130
b2f2af21 FF	131	if (ds->drv->port_disable)
	132	ds->drv->port_disable(ds, p->port, p->phy);
	133
91da11f8 LB	134	return 0;
	135	}
	136
	137	static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
	138	{
	139	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	140	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	141
	142	if (change & IFF_ALLMULTI)
	143	dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
	144	if (change & IFF_PROMISC)
	145	dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
	146	}
	147
	148	static void dsa_slave_set_rx_mode(struct net_device *dev)
	149	{
	150	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	151	struct net_device *master = p->parent->dst->master_netdev;
91da11f8 LB	152
91da11f8 LB	153	dev_mc_sync(master, dev);
a748ee24	154	dev_uc_sync(master, dev);
91da11f8 LB	155	}
91da11f8 LB	156
df02c6ff	157	static int dsa_slave_set_mac_address(struct net_device dev, void a)
91da11f8	158	{
df02c6ff	159	struct dsa_slave_priv *p = netdev_priv(dev);
e84665c9	160	struct net_device *master = p->parent->dst->master_netdev;
df02c6ff LB	161	struct sockaddr *addr = a;
	162	int err;
	163
	164	if (!is_valid_ether_addr(addr->sa_data))
	165	return -EADDRNOTAVAIL;
	166
	167	if (!(dev->flags & IFF_UP))
	168	goto out;
	169
8feedbb4	170	if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
a748ee24	171	err = dev_uc_add(master, addr->sa_data);
df02c6ff LB	172	if (err < 0)
	173	return err;
	174	}
	175
8feedbb4	176	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
a748ee24	177	dev_uc_del(master, dev->dev_addr);
df02c6ff LB	178
df02c6ff LB	179	out:
d08f161a	180	ether_addr_copy(dev->dev_addr, addr->sa_data);
91da11f8 LB	181
	182	return 0;
	183	}
	184
	185	static int dsa_slave_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	186	{
	187	struct dsa_slave_priv *p = netdev_priv(dev);
91da11f8 LB	188
91da11f8 LB	189	if (p->phy != NULL)
28b04113	190	return phy_mii_ioctl(p->phy, ifr, cmd);
91da11f8 LB	191
	192	return -EOPNOTSUPP;
	193	}
	194
3e8a72d1 FF	195	static netdev_tx_t dsa_slave_xmit(struct sk_buff skb, struct net_device dev)
	196	{
	197	struct dsa_slave_priv *p = netdev_priv(dev);
3e8a72d1	198
5075314e	199	return p->xmit(skb, dev);
3e8a72d1 FF	200	}
3e8a72d1 FF	201
5aed85ce FF	202	static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
	203	struct net_device *dev)
	204	{
	205	struct dsa_slave_priv *p = netdev_priv(dev);
	206
	207	skb->dev = p->parent->dst->master_netdev;
	208	dev_queue_xmit(skb);
	209
	210	return NETDEV_TX_OK;
	211	}
	212
91da11f8 LB	213
	214	/* ethtool operations *******************************************************/
	215	static int
	216	dsa_slave_get_settings(struct net_device dev, struct ethtool_cmd cmd)
	217	{
	218	struct dsa_slave_priv *p = netdev_priv(dev);
	219	int err;
	220
	221	err = -EOPNOTSUPP;
	222	if (p->phy != NULL) {
	223	err = phy_read_status(p->phy);
	224	if (err == 0)
	225	err = phy_ethtool_gset(p->phy, cmd);
	226	}
	227
	228	return err;
	229	}
	230
	231	static int
	232	dsa_slave_set_settings(struct net_device dev, struct ethtool_cmd cmd)
	233	{
	234	struct dsa_slave_priv *p = netdev_priv(dev);
	235
	236	if (p->phy != NULL)
	237	return phy_ethtool_sset(p->phy, cmd);
	238
	239	return -EOPNOTSUPP;
	240	}
	241
	242	static void dsa_slave_get_drvinfo(struct net_device *dev,
	243	struct ethtool_drvinfo *drvinfo)
	244	{
7826d43f JP	245	strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
	246	strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
	247	strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
	248	strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
91da11f8 LB	249	}
	250
	251	static int dsa_slave_nway_reset(struct net_device *dev)
	252	{
	253	struct dsa_slave_priv *p = netdev_priv(dev);
	254
	255	if (p->phy != NULL)
	256	return genphy_restart_aneg(p->phy);
	257
	258	return -EOPNOTSUPP;
	259	}
	260
	261	static u32 dsa_slave_get_link(struct net_device *dev)
	262	{
	263	struct dsa_slave_priv *p = netdev_priv(dev);
	264
	265	if (p->phy != NULL) {
	266	genphy_update_link(p->phy);
	267	return p->phy->link;
	268	}
	269
	270	return -EOPNOTSUPP;
	271	}
	272
	273	static void dsa_slave_get_strings(struct net_device *dev,
	274	uint32_t stringset, uint8_t *data)
	275	{
	276	struct dsa_slave_priv *p = netdev_priv(dev);
	277	struct dsa_switch *ds = p->parent;
	278
	279	if (stringset == ETH_SS_STATS) {
	280	int len = ETH_GSTRING_LEN;
	281
	282	strncpy(data, "tx_packets", len);
	283	strncpy(data + len, "tx_bytes", len);
	284	strncpy(data + 2 * len, "rx_packets", len);
	285	strncpy(data + 3 * len, "rx_bytes", len);
	286	if (ds->drv->get_strings != NULL)
	287	ds->drv->get_strings(ds, p->port, data + 4 * len);
	288	}
	289	}
	290
	291	static void dsa_slave_get_ethtool_stats(struct net_device *dev,
	292	struct ethtool_stats *stats,
	293	uint64_t *data)
	294	{
	295	struct dsa_slave_priv *p = netdev_priv(dev);
	296	struct dsa_switch *ds = p->parent;
	297
	298	data[0] = p->dev->stats.tx_packets;
	299	data[1] = p->dev->stats.tx_bytes;
	300	data[2] = p->dev->stats.rx_packets;
	301	data[3] = p->dev->stats.rx_bytes;
	302	if (ds->drv->get_ethtool_stats != NULL)
	303	ds->drv->get_ethtool_stats(ds, p->port, data + 4);
	304	}
	305
	306	static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
	307	{
	308	struct dsa_slave_priv *p = netdev_priv(dev);
	309	struct dsa_switch *ds = p->parent;
	310
	311	if (sset == ETH_SS_STATS) {
	312	int count;
313
314	count = 4;
315	if (ds->drv->get_sset_count != NULL)
316	count += ds->drv->get_sset_count(ds);
317
318	return count;
319	}
320
321	return -EOPNOTSUPP;
322	}
323
19e57c4e FF	324	static void dsa_slave_get_wol(struct net_device dev, struct ethtool_wolinfo w)
	325	{
	326	struct dsa_slave_priv *p = netdev_priv(dev);
	327	struct dsa_switch *ds = p->parent;
	328
	329	if (ds->drv->get_wol)
	330	ds->drv->get_wol(ds, p->port, w);
	331	}
	332
	333	static int dsa_slave_set_wol(struct net_device dev, struct ethtool_wolinfo w)
	334	{
	335	struct dsa_slave_priv *p = netdev_priv(dev);
	336	struct dsa_switch *ds = p->parent;
	337	int ret = -EOPNOTSUPP;
	338
	339	if (ds->drv->set_wol)
	340	ret = ds->drv->set_wol(ds, p->port, w);
	341
	342	return ret;
	343	}
	344
91da11f8 LB	345	static const struct ethtool_ops dsa_slave_ethtool_ops = {
	346	.get_settings = dsa_slave_get_settings,
	347	.set_settings = dsa_slave_set_settings,
	348	.get_drvinfo = dsa_slave_get_drvinfo,
	349	.nway_reset = dsa_slave_nway_reset,
	350	.get_link = dsa_slave_get_link,
91da11f8 LB	351	.get_strings = dsa_slave_get_strings,
	352	.get_ethtool_stats = dsa_slave_get_ethtool_stats,
	353	.get_sset_count = dsa_slave_get_sset_count,
19e57c4e FF	354	.set_wol = dsa_slave_set_wol,
19e57c4e FF	355	.get_wol = dsa_slave_get_wol,
91da11f8 LB	356	};
91da11f8 LB	357
3e8a72d1	358	static const struct net_device_ops dsa_slave_netdev_ops = {
c0840801	359	.ndo_init = dsa_slave_init,
d442ad4a SH	360	.ndo_open = dsa_slave_open,
d442ad4a SH	361	.ndo_stop = dsa_slave_close,
3e8a72d1	362	.ndo_start_xmit = dsa_slave_xmit,
d442ad4a SH	363	.ndo_change_rx_flags = dsa_slave_change_rx_flags,
d442ad4a SH	364	.ndo_set_rx_mode = dsa_slave_set_rx_mode,
d442ad4a SH	365	.ndo_set_mac_address = dsa_slave_set_mac_address,
	366	.ndo_do_ioctl = dsa_slave_ioctl,
	367	};
91da11f8	368
0d8bcdd3 FF	369	static void dsa_slave_adjust_link(struct net_device *dev)
	370	{
	371	struct dsa_slave_priv *p = netdev_priv(dev);
ec9436ba	372	struct dsa_switch *ds = p->parent;
0d8bcdd3 FF	373	unsigned int status_changed = 0;
	374
	375	if (p->old_link != p->phy->link) {
	376	status_changed = 1;
	377	p->old_link = p->phy->link;
	378	}
	379
	380	if (p->old_duplex != p->phy->duplex) {
	381	status_changed = 1;
	382	p->old_duplex = p->phy->duplex;
	383	}
	384
	385	if (p->old_pause != p->phy->pause) {
	386	status_changed = 1;
	387	p->old_pause = p->phy->pause;
	388	}
	389
ec9436ba FF	390	if (ds->drv->adjust_link && status_changed)
	391	ds->drv->adjust_link(ds, p->port, p->phy);
	392
0d8bcdd3 FF	393	if (status_changed)
	394	phy_print_status(p->phy);
	395	}
	396
ce31b31c FF	397	static int dsa_slave_fixed_link_update(struct net_device *dev,
	398	struct fixed_phy_status *status)
	399	{
	400	struct dsa_slave_priv *p = netdev_priv(dev);
	401	struct dsa_switch *ds = p->parent;
	402
	403	if (ds->drv->fixed_link_update)
	404	ds->drv->fixed_link_update(ds, p->port, status);
	405
	406	return 0;
	407	}
	408
91da11f8	409	/* slave device setup *******************************************************/
0d8bcdd3 FF	410	static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
	411	struct net_device *slave_dev)
	412	{
	413	struct dsa_switch *ds = p->parent;
	414	struct dsa_chip_data *cd = ds->pd;
	415	struct device_node phy_dn, port_dn;
ce31b31c	416	bool phy_is_fixed = false;
6819563e	417	u32 phy_flags = 0;
0d8bcdd3 FF	418	int ret;
	419
	420	port_dn = cd->port_dn[p->port];
	421	p->phy_interface = of_get_phy_mode(port_dn);
	422
	423	phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
	424	if (of_phy_is_fixed_link(port_dn)) {
	425	/* In the case of a fixed PHY, the DT node associated
	426	* to the fixed PHY is the Port DT node
	427	*/
	428	ret = of_phy_register_fixed_link(port_dn);
	429	if (ret) {
	430	pr_err("failed to register fixed PHY\n");
	431	return;
	432	}
ce31b31c	433	phy_is_fixed = true;
0d8bcdd3 FF	434	phy_dn = port_dn;
	435	}
	436
6819563e FF	437	if (ds->drv->get_phy_flags)
	438	phy_flags = ds->drv->get_phy_flags(ds, p->port);
	439
0d8bcdd3 FF	440	if (phy_dn)
0d8bcdd3 FF	441	p->phy = of_phy_connect(slave_dev, phy_dn,
6819563e	442	dsa_slave_adjust_link, phy_flags,
0d8bcdd3 FF	443	p->phy_interface);
0d8bcdd3 FF	444
ce31b31c FF	445	if (p->phy && phy_is_fixed)
	446	fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
	447
0d8bcdd3 FF	448	/* We could not connect to a designated PHY, so use the switch internal
	449	* MDIO bus instead
	450	*/
	451	if (!p->phy)
	452	p->phy = ds->slave_mii_bus->phy_map[p->port];
	453	else
	454	pr_info("attached PHY at address %d [%s]\n",
	455	p->phy->addr, p->phy->drv->name);
	456	}
	457
24462549 FF	458	int dsa_slave_suspend(struct net_device *slave_dev)
	459	{
	460	struct dsa_slave_priv *p = netdev_priv(slave_dev);
	461
	462	netif_device_detach(slave_dev);
	463
	464	if (p->phy) {
	465	phy_stop(p->phy);
	466	p->old_pause = -1;
	467	p->old_link = -1;
	468	p->old_duplex = -1;
	469	phy_suspend(p->phy);
	470	}
	471
	472	return 0;
	473	}
	474
	475	int dsa_slave_resume(struct net_device *slave_dev)
	476	{
	477	struct dsa_slave_priv *p = netdev_priv(slave_dev);
	478
	479	netif_device_attach(slave_dev);
	480
	481	if (p->phy) {
	482	phy_resume(p->phy);
	483	phy_start(p->phy);
	484	}
	485
	486	return 0;
	487	}
	488
91da11f8 LB	489	struct net_device *
	490	dsa_slave_create(struct dsa_switch ds, struct device parent,
	491	int port, char *name)
	492	{
e84665c9	493	struct net_device *master = ds->dst->master_netdev;
91da11f8 LB	494	struct net_device *slave_dev;
	495	struct dsa_slave_priv *p;
	496	int ret;
	497
c835a677 TG	498	slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
c835a677 TG	499	NET_NAME_UNKNOWN, ether_setup);
91da11f8 LB	500	if (slave_dev == NULL)
	501	return slave_dev;
	502
	503	slave_dev->features = master->vlan_features;
7ad24ea4	504	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2fcc8005	505	eth_hw_addr_inherit(slave_dev, master);
91da11f8	506	slave_dev->tx_queue_len = 0;
3e8a72d1	507	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
d442ad4a	508
5075314e AD	509	SET_NETDEV_DEV(slave_dev, parent);
	510	slave_dev->dev.of_node = ds->pd->port_dn[port];
	511	slave_dev->vlan_features = master->vlan_features;
	512
	513	p = netdev_priv(slave_dev);
	514	p->dev = slave_dev;
	515	p->parent = ds;
	516	p->port = port;
	517
e84665c9	518	switch (ds->dst->tag_protocol) {
cf85d08f	519	#ifdef CONFIG_NET_DSA_TAG_DSA
ac7a04c3	520	case DSA_TAG_PROTO_DSA:
5075314e	521	p->xmit = dsa_netdev_ops.xmit;
cf85d08f LB	522	break;
cf85d08f LB	523	#endif
91da11f8	524	#ifdef CONFIG_NET_DSA_TAG_EDSA
ac7a04c3	525	case DSA_TAG_PROTO_EDSA:
5075314e	526	p->xmit = edsa_netdev_ops.xmit;
91da11f8	527	break;
396138f0 LB	528	#endif
396138f0 LB	529	#ifdef CONFIG_NET_DSA_TAG_TRAILER
ac7a04c3	530	case DSA_TAG_PROTO_TRAILER:
5075314e	531	p->xmit = trailer_netdev_ops.xmit;
396138f0	532	break;
5037d532 FF	533	#endif
5037d532 FF	534	#ifdef CONFIG_NET_DSA_TAG_BRCM
ac7a04c3	535	case DSA_TAG_PROTO_BRCM:
5075314e	536	p->xmit = brcm_netdev_ops.xmit;
5037d532	537	break;
91da11f8 LB	538	#endif
91da11f8 LB	539	default:
5075314e	540	p->xmit = dsa_slave_notag_xmit;
5aed85ce	541	break;
91da11f8	542	}
d442ad4a	543
0d8bcdd3 FF	544	p->old_pause = -1;
	545	p->old_link = -1;
	546	p->old_duplex = -1;
	547
	548	dsa_slave_phy_setup(p, slave_dev);
91da11f8 LB	549
	550	ret = register_netdev(slave_dev);
	551	if (ret) {
	552	printk(KERN_ERR "%s: error %d registering interface %s\n",
	553	master->name, ret, slave_dev->name);
	554	free_netdev(slave_dev);
	555	return NULL;
	556	}
	557
	558	netif_carrier_off(slave_dev);
	559
	560	if (p->phy != NULL) {
6819563e FF	561	if (ds->drv->get_phy_flags(ds, port))
	562	p->phy->dev_flags \|= ds->drv->get_phy_flags(ds, port);
	563
fb28ad35	564	phy_attach(slave_dev, dev_name(&p->phy->dev),
f9a8f83b	565	PHY_INTERFACE_MODE_GMII);
91da11f8 LB	566
	567	p->phy->autoneg = AUTONEG_ENABLE;
	568	p->phy->speed = 0;
	569	p->phy->duplex = 0;
	570	p->phy->advertising = p->phy->supported \| ADVERTISED_Autoneg;
	571	phy_start_aneg(p->phy);
	572	}
	573
	574	return slave_dev;
	575	}