diff options
Diffstat (limited to 'net/dsa/slave.c')
-rw-r--r-- | net/dsa/slave.c | 218 |
1 files changed, 199 insertions, 19 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c index f23deadf42a0..f0af7aa331c1 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -10,10 +10,14 @@ #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 ***************************************************/ @@ -60,11 +64,18 @@ static int dsa_slave_init(struct net_device *dev) return 0; } +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)) @@ -93,6 +104,9 @@ static int dsa_slave_open(struct net_device *dev) 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); @@ -133,6 +147,9 @@ static int dsa_slave_close(struct net_device *dev) 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; } @@ -194,6 +211,92 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int 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); @@ -472,6 +575,11 @@ static const struct net_device_ops dsa_slave_netdev_ops = { .ndo_do_ioctl = dsa_slave_ioctl, }; +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); @@ -513,6 +621,24 @@ static int dsa_slave_fixed_link_update(struct net_device *dev, } /* 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) { @@ -546,10 +672,25 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 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 (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); @@ -558,14 +699,9 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p, * MDIO bus instead */ if (!p->phy) { - p->phy = ds->slave_mii_bus->phy_map[p->port]; - 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); + 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); @@ -605,9 +741,8 @@ int dsa_slave_resume(struct net_device *slave_dev) return 0; } -struct net_device * -dsa_slave_create(struct dsa_switch *ds, struct device *parent, - int port, char *name) +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; @@ -617,13 +752,14 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent, slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, NET_NAME_UNKNOWN, ether_setup); if (slave_dev == NULL) - return slave_dev; + 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]; @@ -667,19 +803,63 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent, ret = dsa_slave_phy_setup(p, slave_dev); if (ret) { free_netdev(slave_dev); - return NULL; + 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 NULL; + return ret; } netif_carrier_off(slave_dev); - return 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); + 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 + 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; } |