Initial import

1 files changed, 966 insertions, 0 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
new file mode 100644
index 000000000..827cda560
--- /dev/null
+++ b/net/dsa/slave.c
@@ -0,0 +1,966 @@
+/*
+ * 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/netdevice.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <net/rtnetlink.h>
+#include <net/switchdev.h>
+#include <linux/if_bridge.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;
+	ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
+}
+
+
+/* slave device handling ****************************************************/
+static int dsa_slave_get_iflink(const struct net_device *dev)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+
+	return p->parent->dst->master_netdev->ifindex;
+}
+
+static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
+{
+	return !!p->bridge_dev;
+}
+
+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;
+	u8 stp_state = dsa_port_is_bridged(p) ?
+			BR_STATE_BLOCKING : BR_STATE_FORWARDING;
+	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 (ds->drv->port_stp_update)
+		ds->drv->port_stp_update(ds, p->port, stp_state);
+
+	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);
+
+	if (ds->drv->port_stp_update)
+		ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
+
+	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_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+			     struct net_device *dev,
+			     const unsigned char *addr, u16 vid, u16 nlm_flags)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	if (ds->drv->fdb_add)
+		ret = ds->drv->fdb_add(ds, p->port, addr, vid);
+
+	return ret;
+}
+
+static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
+			     struct net_device *dev,
+			     const unsigned char *addr, u16 vid)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	if (ds->drv->fdb_del)
+		ret = ds->drv->fdb_del(ds, p->port, addr, vid);
+
+	return ret;
+}
+
+static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
+			       const unsigned char *addr, u16 vid,
+			       bool is_static,
+			       u32 portid, u32 seq, int type,
+			       unsigned int flags)
+{
+	struct nlmsghdr *nlh;
+	struct ndmsg *ndm;
+
+	nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
+	if (!nlh)
+		return -EMSGSIZE;
+
+	ndm = nlmsg_data(nlh);
+	ndm->ndm_family	 = AF_BRIDGE;
+	ndm->ndm_pad1    = 0;
+	ndm->ndm_pad2    = 0;
+	ndm->ndm_flags	 = NTF_EXT_LEARNED;
+	ndm->ndm_type	 = 0;
+	ndm->ndm_ifindex = dev->ifindex;
+	ndm->ndm_state   = is_static ? NUD_NOARP : NUD_REACHABLE;
+
+	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
+		goto nla_put_failure;
+
+	if (vid && nla_put_u16(skb, NDA_VLAN, vid))
+		goto nla_put_failure;
+
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+/* Dump information about entries, in response to GETNEIGH */
+static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
+			      struct net_device *dev,
+			      struct net_device *filter_dev, int idx)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	unsigned char addr[ETH_ALEN] = { 0 };
+	int ret;
+
+	if (!ds->drv->fdb_getnext)
+		return -EOPNOTSUPP;
+
+	for (; ; idx++) {
+		bool is_static;
+
+		ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
+		if (ret < 0)
+			break;
+
+		if (idx < cb->args[0])
+			continue;
+
+		ret = dsa_slave_fill_info(dev, skb, addr, 0,
+					  is_static,
+					  NETLINK_CB(cb->skb).portid,
+					  cb->nlh->nlmsg_seq,
+					  RTM_NEWNEIGH, NLM_F_MULTI);
+		if (ret < 0)
+			break;
+	}
+
+	return idx;
+}
+
+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;
+}
+
+/* Return a bitmask of all ports being currently bridged within a given bridge
+ * device. Note that on leave, the mask will still return the bitmask of ports
+ * currently bridged, prior to port removal, and this is exactly what we want.
+ */
+static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
+				  struct net_device *bridge)
+{
+	struct dsa_slave_priv *p;
+	unsigned int port;
+	u32 mask = 0;
+
+	for (port = 0; port < DSA_MAX_PORTS; port++) {
+		if (!dsa_is_port_initialized(ds, port))
+			continue;
+
+		p = netdev_priv(ds->ports[port]);
+
+		if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
+		    p->bridge_dev == bridge)
+			mask |= 1 << port;
+	}
+
+	return mask;
+}
+
+static int dsa_slave_stp_update(struct net_device *dev, u8 state)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	if (ds->drv->port_stp_update)
+		ret = ds->drv->port_stp_update(ds, p->port, state);
+
+	return ret;
+}
+
+static int dsa_slave_bridge_port_join(struct net_device *dev,
+				      struct net_device *br)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	p->bridge_dev = br;
+
+	if (ds->drv->port_join_bridge)
+		ret = ds->drv->port_join_bridge(ds, p->port,
+						dsa_slave_br_port_mask(ds, br));
+
+	return ret;
+}
+
+static int dsa_slave_bridge_port_leave(struct net_device *dev)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+
+	if (ds->drv->port_leave_bridge)
+		ret = ds->drv->port_leave_bridge(ds, p->port,
+						 dsa_slave_br_port_mask(ds, p->bridge_dev));
+
+	p->bridge_dev = NULL;
+
+	/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
+	 * so allow it to be in BR_STATE_FORWARDING to be kept functional
+	 */
+	dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
+
+	return ret;
+}
+
+static int dsa_slave_parent_id_get(struct net_device *dev,
+				   struct netdev_phys_item_id *psid)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	psid->id_len = sizeof(ds->index);
+	memcpy(&psid->id, &ds->index, psid->id_len);
+
+	return 0;
+}
+
+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_get_regs_len(struct net_device *dev)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	if (ds->drv->get_regs_len)
+		return ds->drv->get_regs_len(ds, p->port);
+
+	return -EOPNOTSUPP;
+}
+
+static void
+dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	if (ds->drv->get_regs)
+		ds->drv->get_regs(ds, p->port, regs, _p);
+}
+
+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 int dsa_slave_get_eeprom_len(struct net_device *dev)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	if (ds->pd->eeprom_len)
+		return ds->pd->eeprom_len;
+
+	if (ds->drv->get_eeprom_len)
+		return ds->drv->get_eeprom_len(ds);
+
+	return 0;
+}
+
+static int dsa_slave_get_eeprom(struct net_device *dev,
+				struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	if (ds->drv->get_eeprom)
+		return ds->drv->get_eeprom(ds, eeprom, data);
+
+	return -EOPNOTSUPP;
+}
+
+static int dsa_slave_set_eeprom(struct net_device *dev,
+				struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	if (ds->drv->set_eeprom)
+		return ds->drv->set_eeprom(ds, eeprom, data);
+
+	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,
+	.get_regs_len		= dsa_slave_get_regs_len,
+	.get_regs		= dsa_slave_get_regs,
+	.nway_reset		= dsa_slave_nway_reset,
+	.get_link		= dsa_slave_get_link,
+	.get_eeprom_len		= dsa_slave_get_eeprom_len,
+	.get_eeprom		= dsa_slave_get_eeprom,
+	.set_eeprom		= dsa_slave_set_eeprom,
+	.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_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_fdb_add		= dsa_slave_fdb_add,
+	.ndo_fdb_del		= dsa_slave_fdb_del,
+	.ndo_fdb_dump		= dsa_slave_fdb_dump,
+	.ndo_do_ioctl		= dsa_slave_ioctl,
+	.ndo_get_iflink		= dsa_slave_get_iflink,
+};
+
+static const struct swdev_ops dsa_slave_swdev_ops = {
+	.swdev_parent_id_get = dsa_slave_parent_id_get,
+	.swdev_port_stp_update = dsa_slave_stp_update,
+};
+
+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 int dsa_slave_phy_connect(struct dsa_slave_priv *p,
+				 struct net_device *slave_dev,
+				 int addr)
+{
+	struct dsa_switch *ds = p->parent;
+
+	p->phy = ds->slave_mii_bus->phy_map[addr];
+	if (!p->phy)
+		return -ENODEV;
+
+	/* Use already configured phy mode */
+	p->phy_interface = p->phy->interface;
+	phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
+			   p->phy_interface);
+
+	return 0;
+}
+
+static int 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 mode, ret;
+
+	port_dn = cd->port_dn[p->port];
+	mode = of_get_phy_mode(port_dn);
+	if (mode < 0)
+		mode = PHY_INTERFACE_MODE_NA;
+	p->phy_interface = mode;
+
+	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) {
+			netdev_err(slave_dev, "failed to register fixed PHY\n");
+			return ret;
+		}
+		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) {
+		ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
+		/* If this PHY address is part of phys_mii_mask, which means
+		 * that we need to divert reads and writes to/from it, then we
+		 * want to bind this device using the slave MII bus created by
+		 * DSA to make that happen.
+		 */
+		if (!phy_is_fixed && ret >= 0 &&
+		    (ds->phys_mii_mask & (1 << ret))) {
+			ret = dsa_slave_phy_connect(p, slave_dev, ret);
+			if (ret)
+				return ret;
+		} else {
+			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) {
+		ret = dsa_slave_phy_connect(p, slave_dev, p->port);
+		if (ret)
+			return ret;
+	} else {
+		netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
+			    p->phy->addr, p->phy->drv->name);
+	}
+
+	return 0;
+}
+
+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;
+}
+
+int 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 -ENOMEM;
+
+	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;
+	slave_dev->swdev_ops = &dsa_slave_swdev_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;
+
+	ret = dsa_slave_phy_setup(p, slave_dev);
+	if (ret) {
+		free_netdev(slave_dev);
+		return ret;
+	}
+
+	ds->ports[port] = slave_dev;
+	ret = register_netdev(slave_dev);
+	if (ret) {
+		netdev_err(master, "error %d registering interface %s\n",
+			   ret, slave_dev->name);
+		phy_disconnect(p->phy);
+		ds->ports[port] = NULL;
+		free_netdev(slave_dev);
+		return ret;
+	}
+
+	netif_carrier_off(slave_dev);
+
+	return 0;
+}
+
+static bool dsa_slave_dev_check(struct net_device *dev)
+{
+	return dev->netdev_ops == &dsa_slave_netdev_ops;
+}
+
+static int dsa_slave_master_changed(struct net_device *dev)
+{
+	struct net_device *master = netdev_master_upper_dev_get(dev);
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	int err = 0;
+
+	if (master && master->rtnl_link_ops &&
+	    !strcmp(master->rtnl_link_ops->kind, "bridge"))
+		err = dsa_slave_bridge_port_join(dev, master);
+	else if (dsa_port_is_bridged(p))
+		err = dsa_slave_bridge_port_leave(dev);
+
+	return err;
+}
+
+int dsa_slave_netdevice_event(struct notifier_block *unused,
+			      unsigned long event, void *ptr)
+{
+	struct net_device *dev;
+	int err = 0;
+
+	switch (event) {
+	case NETDEV_CHANGEUPPER:
+		dev = netdev_notifier_info_to_dev(ptr);
+		if (!dsa_slave_dev_check(dev))
+			goto out;
+
+		err = dsa_slave_master_changed(dev);
+		if (err)
+			netdev_warn(dev, "failed to reflect master change\n");
+
+		break;
+	}
+
+out:
+	return NOTIFY_DONE;
+}