slave.c 25.3 KB
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/*
 * net/dsa/slave.c - Slave device handling
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 * Copyright (c) 2008-2009 Marvell Semiconductor
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 *
 * 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>
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#include <linux/etherdevice.h>
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#include <linux/netdevice.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <linux/of_net.h>
#include <linux/of_mdio.h>
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#include <net/rtnetlink.h>
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#include <net/switchdev.h>
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#include <linux/if_bridge.h>
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#include <linux/netpoll.h>
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#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;

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	if (ds->phys_mii_mask & (1 << addr))
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		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;

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	if (ds->phys_mii_mask & (1 << addr))
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		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;
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	snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
			ds->index, ds->pd->sw_addr);
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	ds->slave_mii_bus->parent = ds->master_dev;
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	ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
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}


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

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	return p->parent->dst->master_netdev->ifindex;
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}

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static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
{
	return !!p->bridge_dev;
}

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static int dsa_slave_open(struct net_device *dev)
{
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	struct dsa_slave_priv *p = netdev_priv(dev);
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	struct net_device *master = p->parent->dst->master_netdev;
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	struct dsa_switch *ds = p->parent;
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	u8 stp_state = dsa_port_is_bridged(p) ?
			BR_STATE_BLOCKING : BR_STATE_FORWARDING;
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	int err;

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

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

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

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	if (ds->drv->port_stp_update)
		ds->drv->port_stp_update(ds, p->port, stp_state);

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

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	return 0;
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clear_promisc:
	if (dev->flags & IFF_PROMISC)
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		dev_set_promiscuity(master, -1);
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clear_allmulti:
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(master, -1);
del_unicast:
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	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
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		dev_uc_del(master, dev->dev_addr);
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out:
	return err;
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}

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

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

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	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
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		dev_uc_del(master, dev->dev_addr);
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	if (ds->drv->port_disable)
		ds->drv->port_disable(ds, p->port, p->phy);

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	if (ds->drv->port_stp_update)
		ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);

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	return 0;
}

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

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

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

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

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

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	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
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		dev_uc_del(master, dev->dev_addr);
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out:
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	ether_addr_copy(dev->dev_addr, addr->sa_data);
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	return 0;
}

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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;

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	if (ds->drv->port_fdb_add)
		ret = ds->drv->port_fdb_add(ds, p->port, addr, vid);
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	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;

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	if (ds->drv->port_fdb_del)
		ret = ds->drv->port_fdb_del(ds, p->port, addr, vid);
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	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 };
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	u16 vid = 0;
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	int ret;

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

	for (; ; idx++) {
		bool is_static;

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		ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
						&is_static);
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		if (ret < 0)
			break;

		if (idx < cb->args[0])
			continue;

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		ret = dsa_slave_fill_info(dev, skb, addr, vid,
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					  is_static,
					  NETLINK_CB(cb->skb).portid,
					  cb->nlh->nlmsg_seq,
					  RTM_NEWNEIGH, NLM_F_MULTI);
		if (ret < 0)
			break;
	}

	return idx;
}

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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)
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		return phy_mii_ioctl(p->phy, ifr, cmd);
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	return -EOPNOTSUPP;
}

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/* 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++) {
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		if (!dsa_is_port_initialized(ds, port))
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			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;
}

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static int dsa_slave_port_attr_set(struct net_device *dev,
				   struct switchdev_attr *attr)
{
	int ret = 0;

	switch (attr->id) {
	case SWITCHDEV_ATTR_PORT_STP_STATE:
		if (attr->trans == SWITCHDEV_TRANS_COMMIT)
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			ret = dsa_slave_stp_update(dev, attr->u.stp_state);
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		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	return ret;
}

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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;
}

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

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	switch (attr->id) {
	case SWITCHDEV_ATTR_PORT_PARENT_ID:
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		attr->u.ppid.id_len = sizeof(ds->index);
		memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
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		break;
	default:
		return -EOPNOTSUPP;
	}
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	return 0;
}

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static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
					       struct sk_buff *skb)
{
#ifdef CONFIG_NET_POLL_CONTROLLER
	if (p->netpoll)
		netpoll_send_skb(p->netpoll, skb);
#else
	BUG();
#endif
	return NETDEV_TX_OK;
}

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static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
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	struct sk_buff *nskb;
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	dev->stats.tx_packets++;
	dev->stats.tx_bytes += skb->len;
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	/* Transmit function may have to reallocate the original SKB */
	nskb = p->xmit(skb, dev);
	if (!nskb)
		return NETDEV_TX_OK;
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	/* SKB for netpoll still need to be mangled with the protocol-specific
	 * tag to be successfully transmitted
	 */
	if (unlikely(netpoll_tx_running(dev)))
		return dsa_netpoll_send_skb(p, nskb);

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	/* Queue the SKB for transmission on the parent interface, but
	 * do not modify its EtherType
	 */
	nskb->dev = p->parent->dst->master_netdev;
	dev_queue_xmit(nskb);
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	return NETDEV_TX_OK;
}

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static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
					    struct net_device *dev)
{
	/* Just return the original SKB */
	return skb;
}

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/* 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)
{
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	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));
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}

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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);
}

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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;
}

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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;
}

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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;
}

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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;
}

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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;
}

700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742
#ifdef CONFIG_NET_POLL_CONTROLLER
static int dsa_slave_netpoll_setup(struct net_device *dev,
				   struct netpoll_info *ni)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct dsa_switch *ds = p->parent;
	struct net_device *master = ds->dst->master_netdev;
	struct netpoll *netpoll;
	int err = 0;

	netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
	if (!netpoll)
		return -ENOMEM;

	err = __netpoll_setup(netpoll, master);
	if (err) {
		kfree(netpoll);
		goto out;
	}

	p->netpoll = netpoll;
out:
	return err;
}

static void dsa_slave_netpoll_cleanup(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
	struct netpoll *netpoll = p->netpoll;

	if (!netpoll)
		return;

	p->netpoll = NULL;

	__netpoll_free_async(netpoll);
}

static void dsa_slave_poll_controller(struct net_device *dev)
{
}
#endif

743 744 745 746
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,
747 748
	.get_regs_len		= dsa_slave_get_regs_len,
	.get_regs		= dsa_slave_get_regs,
749 750
	.nway_reset		= dsa_slave_nway_reset,
	.get_link		= dsa_slave_get_link,
751 752 753
	.get_eeprom_len		= dsa_slave_get_eeprom_len,
	.get_eeprom		= dsa_slave_get_eeprom,
	.set_eeprom		= dsa_slave_set_eeprom,
754 755 756
	.get_strings		= dsa_slave_get_strings,
	.get_ethtool_stats	= dsa_slave_get_ethtool_stats,
	.get_sset_count		= dsa_slave_get_sset_count,
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	.set_wol		= dsa_slave_set_wol,
	.get_wol		= dsa_slave_get_wol,
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	.set_eee		= dsa_slave_set_eee,
	.get_eee		= dsa_slave_get_eee,
761 762
};

763
static const struct net_device_ops dsa_slave_netdev_ops = {
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	.ndo_open	 	= dsa_slave_open,
	.ndo_stop		= dsa_slave_close,
766
	.ndo_start_xmit		= dsa_slave_xmit,
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	.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,
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	.ndo_fdb_add		= dsa_slave_fdb_add,
	.ndo_fdb_del		= dsa_slave_fdb_del,
	.ndo_fdb_dump		= dsa_slave_fdb_dump,
773
	.ndo_do_ioctl		= dsa_slave_ioctl,
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Nicolas Dichtel 已提交
774
	.ndo_get_iflink		= dsa_slave_get_iflink,
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#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_netpoll_setup	= dsa_slave_netpoll_setup,
	.ndo_netpoll_cleanup	= dsa_slave_netpoll_cleanup,
	.ndo_poll_controller	= dsa_slave_poll_controller,
#endif
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Scott Feldman 已提交
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};

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Jiri Pirko 已提交
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static const struct switchdev_ops dsa_slave_switchdev_ops = {
783
	.switchdev_port_attr_get	= dsa_slave_port_attr_get,
784
	.switchdev_port_attr_set	= dsa_slave_port_attr_set,
785
};
786

787 788 789
static void dsa_slave_adjust_link(struct net_device *dev)
{
	struct dsa_slave_priv *p = netdev_priv(dev);
790
	struct dsa_switch *ds = p->parent;
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	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;
	}

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	if (ds->drv->adjust_link && status_changed)
		ds->drv->adjust_link(ds, p->port, p->phy);

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

815 816 817 818 819 820 821 822 823 824 825 826
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;
}

827
/* slave device setup *******************************************************/
828
static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
829 830
				 struct net_device *slave_dev,
				 int addr)
831 832 833
{
	struct dsa_switch *ds = p->parent;

834
	p->phy = ds->slave_mii_bus->phy_map[addr];
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	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;
}

846
static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
847 848 849 850 851
				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;
852
	bool phy_is_fixed = false;
853
	u32 phy_flags = 0;
854
	int mode, ret;
855 856

	port_dn = cd->port_dn[p->port];
857 858 859 860
	mode = of_get_phy_mode(port_dn);
	if (mode < 0)
		mode = PHY_INTERFACE_MODE_NA;
	p->phy_interface = mode;
861 862 863 864 865 866 867 868

	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) {
869
			netdev_err(slave_dev, "failed to register fixed PHY\n");
870
			return ret;
871
		}
872
		phy_is_fixed = true;
873 874 875
		phy_dn = port_dn;
	}

876 877 878
	if (ds->drv->get_phy_flags)
		phy_flags = ds->drv->get_phy_flags(ds, p->port);

879 880 881 882 883 884 885
	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.
		 */
886 887
		if (!phy_is_fixed && ret >= 0 &&
		    (ds->phys_mii_mask & (1 << ret))) {
888 889 890 891 892 893 894 895 896 897
			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);
		}
	}
898

899 900 901
	if (p->phy && phy_is_fixed)
		fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);

902 903 904
	/* We could not connect to a designated PHY, so use the switch internal
	 * MDIO bus instead
	 */
905
	if (!p->phy) {
906
		ret = dsa_slave_phy_connect(p, slave_dev, p->port);
907 908
		if (ret)
			return ret;
909
	} else {
910 911
		netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
			    p->phy->addr, p->phy->drv->name);
912
	}
913 914

	return 0;
915 916
}

917 918 919 920 921 922 923 924 925
static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
					    struct netdev_queue *txq,
					    void *_unused)
{
	lockdep_set_class(&txq->_xmit_lock,
			  &dsa_slave_netdev_xmit_lock_key);
}

926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954
int dsa_slave_suspend(struct net_device *slave_dev)
{
	struct dsa_slave_priv *p = netdev_priv(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;
}

955 956
int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
		     int port, char *name)
957
{
958
	struct net_device *master = ds->dst->master_netdev;
959 960 961 962
	struct net_device *slave_dev;
	struct dsa_slave_priv *p;
	int ret;

963 964
	slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
				 NET_NAME_UNKNOWN, ether_setup);
965
	if (slave_dev == NULL)
966
		return -ENOMEM;
967 968

	slave_dev->features = master->vlan_features;
969
	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
970
	eth_hw_addr_inherit(slave_dev, master);
971
	slave_dev->tx_queue_len = 0;
972
	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
J
Jiri Pirko 已提交
973
	slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
974

975 976 977
	netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
				 NULL);

978 979 980 981 982 983 984 985 986
	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;

987
	switch (ds->dst->tag_protocol) {
988
#ifdef CONFIG_NET_DSA_TAG_DSA
989
	case DSA_TAG_PROTO_DSA:
990
		p->xmit = dsa_netdev_ops.xmit;
991 992
		break;
#endif
993
#ifdef CONFIG_NET_DSA_TAG_EDSA
994
	case DSA_TAG_PROTO_EDSA:
995
		p->xmit = edsa_netdev_ops.xmit;
996
		break;
997 998
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
999
	case DSA_TAG_PROTO_TRAILER:
1000
		p->xmit = trailer_netdev_ops.xmit;
1001
		break;
1002 1003
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
1004
	case DSA_TAG_PROTO_BRCM:
1005
		p->xmit = brcm_netdev_ops.xmit;
1006
		break;
1007 1008
#endif
	default:
1009
		p->xmit	= dsa_slave_notag_xmit;
1010
		break;
1011
	}
1012

1013 1014 1015 1016
	p->old_pause = -1;
	p->old_link = -1;
	p->old_duplex = -1;

1017 1018 1019
	ret = dsa_slave_phy_setup(p, slave_dev);
	if (ret) {
		free_netdev(slave_dev);
1020
		return ret;
1021
	}
1022

1023
	ds->ports[port] = slave_dev;
1024 1025
	ret = register_netdev(slave_dev);
	if (ret) {
1026 1027
		netdev_err(master, "error %d registering interface %s\n",
			   ret, slave_dev->name);
1028
		phy_disconnect(p->phy);
1029
		ds->ports[port] = NULL;
1030
		free_netdev(slave_dev);
1031
		return ret;
1032 1033 1034 1035
	}

	netif_carrier_off(slave_dev);

1036
	return 0;
1037
}
1038 1039 1040 1041 1042 1043 1044 1045 1046

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);
1047
	struct dsa_slave_priv *p = netdev_priv(dev);
1048 1049 1050 1051 1052
	int err = 0;

	if (master && master->rtnl_link_ops &&
	    !strcmp(master->rtnl_link_ops->kind, "bridge"))
		err = dsa_slave_bridge_port_join(dev, master);
1053
	else if (dsa_port_is_bridged(p))
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
		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;
}