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linux-sg2042/net/dsa/slave.c

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/*
* 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;
ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
}
/* 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_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_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 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 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) {
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)
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];
if (!p->phy)
return -ENODEV;
phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
p->phy_interface);
} 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;
}
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;
ret = dsa_slave_phy_setup(p, slave_dev);
if (ret) {
free_netdev(slave_dev);
return NULL;
}
ret = register_netdev(slave_dev);
if (ret) {
netdev_err(master, "error %d registering interface %s\n",
ret, slave_dev->name);
phy_disconnect(p->phy);
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;
}
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