/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dsa_priv.h" static bool dsa_slave_dev_check(struct net_device *dev); static int dsa_port_notify(struct dsa_port *dp, unsigned long e, void *v) { struct raw_notifier_head *nh = &dp->ds->dst->nh; int err; err = raw_notifier_call_chain(nh, e, v); return notifier_to_errno(err); } /* 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->ops->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->ops->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.%d", ds->dst->tree, ds->index); ds->slave_mii_bus->parent = ds->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->dp->ds->dst->master_netdev->ifindex; } static inline bool dsa_port_is_bridged(struct dsa_port *dp) { return !!dp->bridge_dev; } static int dsa_port_set_state(struct dsa_port *dp, u8 state, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; int port = dp->index; if (switchdev_trans_ph_prepare(trans)) return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; if (ds->ops->port_stp_state_set) ds->ops->port_stp_state_set(ds, port, state); if (ds->ops->port_fast_age) { /* Fast age FDB entries or flush appropriate forwarding database * for the given port, if we are moving it from Learning or * Forwarding state, to Disabled or Blocking or Listening state. */ if ((dp->stp_state == BR_STATE_LEARNING || dp->stp_state == BR_STATE_FORWARDING) && (state == BR_STATE_DISABLED || state == BR_STATE_BLOCKING || state == BR_STATE_LISTENING)) ds->ops->port_fast_age(ds, port); } dp->stp_state = state; return 0; } static void dsa_port_set_state_now(struct dsa_port *dp, u8 state) { int err; err = dsa_port_set_state(dp, state, NULL); if (err) pr_err("DSA: failed to set STP state %u (%d)\n", state, err); } static int dsa_slave_open(struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); struct net_device *master = p->dp->ds->dst->master_netdev; struct dsa_switch *ds = p->dp->ds; u8 stp_state = dsa_port_is_bridged(p->dp) ? 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->ops->port_enable) { err = ds->ops->port_enable(ds, p->dp->index, p->phy); if (err) goto clear_promisc; } dsa_port_set_state_now(p->dp, stp_state); if (p->phy) phy_start(p->phy); return 0; clear_promisc: if (dev->flags & IFF_PROMISC) dev_set_promiscuity(master, -1); 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->dp->ds->dst->master_netdev; struct dsa_switch *ds = p->dp->ds; 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->ops->port_disable) ds->ops->port_disable(ds, p->dp->index, p->phy); dsa_port_set_state_now(p->dp, 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->dp->ds->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->dp->ds->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->dp->ds->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_port_vlan_add(struct dsa_port *dp, const struct switchdev_obj_port_vlan *vlan, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; if (switchdev_trans_ph_prepare(trans)) { if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) return -EOPNOTSUPP; return ds->ops->port_vlan_prepare(ds, dp->index, vlan, trans); } ds->ops->port_vlan_add(ds, dp->index, vlan, trans); return 0; } static int dsa_port_vlan_del(struct dsa_port *dp, const struct switchdev_obj_port_vlan *vlan) { struct dsa_switch *ds = dp->ds; if (!ds->ops->port_vlan_del) return -EOPNOTSUPP; return ds->ops->port_vlan_del(ds, dp->index, vlan); } static int dsa_port_vlan_dump(struct dsa_port *dp, struct switchdev_obj_port_vlan *vlan, switchdev_obj_dump_cb_t *cb) { struct dsa_switch *ds = dp->ds; if (ds->ops->port_vlan_dump) return ds->ops->port_vlan_dump(ds, dp->index, vlan, cb); return -EOPNOTSUPP; } static int dsa_port_fdb_add(struct dsa_port *dp, const struct switchdev_obj_port_fdb *fdb, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; if (switchdev_trans_ph_prepare(trans)) { if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add) return -EOPNOTSUPP; return ds->ops->port_fdb_prepare(ds, dp->index, fdb, trans); } ds->ops->port_fdb_add(ds, dp->index, fdb, trans); return 0; } static int dsa_port_fdb_del(struct dsa_port *dp, const struct switchdev_obj_port_fdb *fdb) { struct dsa_switch *ds = dp->ds; int ret = -EOPNOTSUPP; if (ds->ops->port_fdb_del) ret = ds->ops->port_fdb_del(ds, dp->index, fdb); return ret; } static int dsa_port_fdb_dump(struct dsa_port *dp, struct switchdev_obj_port_fdb *fdb, switchdev_obj_dump_cb_t *cb) { struct dsa_switch *ds = dp->ds; if (ds->ops->port_fdb_dump) return ds->ops->port_fdb_dump(ds, dp->index, fdb, cb); return -EOPNOTSUPP; } static int dsa_port_mdb_add(struct dsa_port *dp, const struct switchdev_obj_port_mdb *mdb, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; if (switchdev_trans_ph_prepare(trans)) { if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) return -EOPNOTSUPP; return ds->ops->port_mdb_prepare(ds, dp->index, mdb, trans); } ds->ops->port_mdb_add(ds, dp->index, mdb, trans); return 0; } static int dsa_port_mdb_del(struct dsa_port *dp, const struct switchdev_obj_port_mdb *mdb) { struct dsa_switch *ds = dp->ds; if (ds->ops->port_mdb_del) return ds->ops->port_mdb_del(ds, dp->index, mdb); return -EOPNOTSUPP; } static int dsa_port_mdb_dump(struct dsa_port *dp, struct switchdev_obj_port_mdb *mdb, switchdev_obj_dump_cb_t *cb) { struct dsa_switch *ds = dp->ds; if (ds->ops->port_mdb_dump) return ds->ops->port_mdb_dump(ds, dp->index, mdb, cb); return -EOPNOTSUPP; } 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 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ if (switchdev_trans_ph_prepare(trans)) return 0; if (ds->ops->port_vlan_filtering) return ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering); return 0; } static unsigned int dsa_fastest_ageing_time(struct dsa_switch *ds, unsigned int ageing_time) { int i; for (i = 0; i < ds->num_ports; ++i) { struct dsa_port *dp = &ds->ports[i]; if (dp->ageing_time && dp->ageing_time < ageing_time) ageing_time = dp->ageing_time; } return ageing_time; } static int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock, struct switchdev_trans *trans) { unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); struct dsa_switch *ds = dp->ds; if (switchdev_trans_ph_prepare(trans)) { if (ds->ageing_time_min && ageing_time < ds->ageing_time_min) return -ERANGE; if (ds->ageing_time_max && ageing_time > ds->ageing_time_max) return -ERANGE; return 0; } /* Keep the fastest ageing time in case of multiple bridges */ dp->ageing_time = ageing_time; ageing_time = dsa_fastest_ageing_time(ds, ageing_time); if (ds->ops->set_ageing_time) return ds->ops->set_ageing_time(ds, ageing_time); return 0; } static int dsa_slave_port_attr_set(struct net_device *dev, const struct switchdev_attr *attr, struct switchdev_trans *trans) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_port *dp = p->dp; int ret; switch (attr->id) { case SWITCHDEV_ATTR_ID_PORT_STP_STATE: ret = dsa_port_set_state(dp, attr->u.stp_state, trans); break; case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, trans); break; case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); break; default: ret = -EOPNOTSUPP; break; } return ret; } static int dsa_slave_port_obj_add(struct net_device *dev, const struct switchdev_obj *obj, struct switchdev_trans *trans) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_port *dp = p->dp; int err; /* For the prepare phase, ensure the full set of changes is feasable in * one go in order to signal a failure properly. If an operation is not * supported, return -EOPNOTSUPP. */ switch (obj->id) { case SWITCHDEV_OBJ_ID_PORT_FDB: err = dsa_port_fdb_add(dp, SWITCHDEV_OBJ_PORT_FDB(obj), trans); break; case SWITCHDEV_OBJ_ID_PORT_MDB: err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); break; case SWITCHDEV_OBJ_ID_PORT_VLAN: err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), trans); break; default: err = -EOPNOTSUPP; break; } return err; } static int dsa_slave_port_obj_del(struct net_device *dev, const struct switchdev_obj *obj) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_port *dp = p->dp; int err; switch (obj->id) { case SWITCHDEV_OBJ_ID_PORT_FDB: err = dsa_port_fdb_del(dp, SWITCHDEV_OBJ_PORT_FDB(obj)); break; case SWITCHDEV_OBJ_ID_PORT_MDB: err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); break; case SWITCHDEV_OBJ_ID_PORT_VLAN: err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); break; default: err = -EOPNOTSUPP; break; } return err; } static int dsa_slave_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, switchdev_obj_dump_cb_t *cb) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_port *dp = p->dp; int err; switch (obj->id) { case SWITCHDEV_OBJ_ID_PORT_FDB: err = dsa_port_fdb_dump(dp, SWITCHDEV_OBJ_PORT_FDB(obj), cb); break; case SWITCHDEV_OBJ_ID_PORT_MDB: err = dsa_port_mdb_dump(dp, SWITCHDEV_OBJ_PORT_MDB(obj), cb); break; case SWITCHDEV_OBJ_ID_PORT_VLAN: err = dsa_port_vlan_dump(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), cb); break; default: err = -EOPNOTSUPP; break; } return err; } static int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br) { struct dsa_notifier_bridge_info info = { .sw_index = dp->ds->index, .port = dp->index, .br = br, }; int err; /* Here the port is already bridged. Reflect the current configuration * so that drivers can program their chips accordingly. */ dp->bridge_dev = br; err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info); /* The bridging is rolled back on error */ if (err) dp->bridge_dev = NULL; return err; } static void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) { struct dsa_notifier_bridge_info info = { .sw_index = dp->ds->index, .port = dp->index, .br = br, }; int err; /* Here the port is already unbridged. Reflect the current configuration * so that drivers can program their chips accordingly. */ dp->bridge_dev = NULL; err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info); if (err) pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n"); /* 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_port_set_state_now(dp, BR_STATE_FORWARDING); } static int dsa_slave_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->dp->ds; switch (attr->id) { case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: attr->u.ppid.id_len = sizeof(ds->index); memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); break; default: return -EOPNOTSUPP; } return 0; } 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; } static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); struct sk_buff *nskb; dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; /* Transmit function may have to reallocate the original SKB */ nskb = p->xmit(skb, dev); if (!nskb) return NETDEV_TX_OK; /* 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); /* Queue the SKB for transmission on the parent interface, but * do not modify its EtherType */ nskb->dev = p->dp->ds->dst->master_netdev; dev_queue_xmit(nskb); return NETDEV_TX_OK; } /* ethtool operations *******************************************************/ static int dsa_slave_get_link_ksettings(struct net_device *dev, struct ethtool_link_ksettings *cmd) { struct dsa_slave_priv *p = netdev_priv(dev); int err = -EOPNOTSUPP; if (p->phy != NULL) err = phy_ethtool_ksettings_get(p->phy, cmd); return err; } static int dsa_slave_set_link_ksettings(struct net_device *dev, const struct ethtool_link_ksettings *cmd) { struct dsa_slave_priv *p = netdev_priv(dev); if (p->phy != NULL) return phy_ethtool_ksettings_set(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->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->dp->ds; if (ds->ops->get_regs_len) return ds->ops->get_regs_len(ds, p->dp->index); 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->dp->ds; if (ds->ops->get_regs) ds->ops->get_regs(ds, p->dp->index, 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->dp->ds; if (ds->cd && ds->cd->eeprom_len) return ds->cd->eeprom_len; if (ds->ops->get_eeprom_len) return ds->ops->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->dp->ds; if (ds->ops->get_eeprom) return ds->ops->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->dp->ds; if (ds->ops->set_eeprom) return ds->ops->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->dp->ds; 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->ops->get_strings) ds->ops->get_strings(ds, p->dp->index, data + 4 * len); } } static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, uint64_t *data) { struct dsa_switch_tree *dst = dev->dsa_ptr; struct dsa_switch *ds = dst->cpu_dp->ds; s8 cpu_port = dst->cpu_dp->index; int count = 0; if (dst->master_ethtool_ops.get_sset_count) { count = dst->master_ethtool_ops.get_sset_count(dev, ETH_SS_STATS); dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data); } if (ds->ops->get_ethtool_stats) ds->ops->get_ethtool_stats(ds, cpu_port, data + count); } static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) { struct dsa_switch_tree *dst = dev->dsa_ptr; struct dsa_switch *ds = dst->cpu_dp->ds; int count = 0; if (dst->master_ethtool_ops.get_sset_count) count += dst->master_ethtool_ops.get_sset_count(dev, sset); if (sset == ETH_SS_STATS && ds->ops->get_sset_count) count += ds->ops->get_sset_count(ds); return count; } static void dsa_cpu_port_get_strings(struct net_device *dev, uint32_t stringset, uint8_t *data) { struct dsa_switch_tree *dst = dev->dsa_ptr; struct dsa_switch *ds = dst->cpu_dp->ds; s8 cpu_port = dst->cpu_dp->index; int len = ETH_GSTRING_LEN; int mcount = 0, count; unsigned int i; uint8_t pfx[4]; uint8_t *ndata; snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); /* We do not want to be NULL-terminated, since this is a prefix */ pfx[sizeof(pfx) - 1] = '_'; if (dst->master_ethtool_ops.get_sset_count) { mcount = dst->master_ethtool_ops.get_sset_count(dev, ETH_SS_STATS); dst->master_ethtool_ops.get_strings(dev, stringset, data); } if (stringset == ETH_SS_STATS && ds->ops->get_strings) { ndata = data + mcount * len; /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle * the output after to prepend our CPU port prefix we * constructed earlier */ ds->ops->get_strings(ds, cpu_port, ndata); count = ds->ops->get_sset_count(ds); for (i = 0; i < count; i++) { memmove(ndata + (i * len + sizeof(pfx)), ndata + i * len, len - sizeof(pfx)); memcpy(ndata + i * len, pfx, sizeof(pfx)); } } } 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->dp->ds; data[0] = dev->stats.tx_packets; data[1] = dev->stats.tx_bytes; data[2] = dev->stats.rx_packets; data[3] = dev->stats.rx_bytes; if (ds->ops->get_ethtool_stats) ds->ops->get_ethtool_stats(ds, p->dp->index, 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->dp->ds; if (sset == ETH_SS_STATS) { int count; count = 4; if (ds->ops->get_sset_count) count += ds->ops->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->dp->ds; if (ds->ops->get_wol) ds->ops->get_wol(ds, p->dp->index, 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->dp->ds; int ret = -EOPNOTSUPP; if (ds->ops->set_wol) ret = ds->ops->set_wol(ds, p->dp->index, 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->dp->ds; int ret; if (!ds->ops->set_eee) return -EOPNOTSUPP; ret = ds->ops->set_eee(ds, p->dp->index, 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->dp->ds; int ret; if (!ds->ops->get_eee) return -EOPNOTSUPP; ret = ds->ops->get_eee(ds, p->dp->index, e); if (ret) return ret; if (p->phy) ret = phy_ethtool_get_eee(p->phy, e); return ret; } #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->dp->ds; 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 static int dsa_slave_get_phys_port_name(struct net_device *dev, char *name, size_t len) { struct dsa_slave_priv *p = netdev_priv(dev); if (snprintf(name, len, "p%d", p->dp->index) >= len) return -EINVAL; return 0; } static struct dsa_mall_tc_entry * dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p, unsigned long cookie) { struct dsa_mall_tc_entry *mall_tc_entry; list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) if (mall_tc_entry->cookie == cookie) return mall_tc_entry; return NULL; } static int dsa_slave_add_cls_matchall(struct net_device *dev, __be16 protocol, struct tc_cls_matchall_offload *cls, bool ingress) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_mall_tc_entry *mall_tc_entry; struct dsa_switch *ds = p->dp->ds; struct net *net = dev_net(dev); struct dsa_slave_priv *to_p; struct net_device *to_dev; const struct tc_action *a; int err = -EOPNOTSUPP; LIST_HEAD(actions); int ifindex; if (!ds->ops->port_mirror_add) return err; if (!tc_single_action(cls->exts)) return err; tcf_exts_to_list(cls->exts, &actions); a = list_first_entry(&actions, struct tc_action, list); if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { struct dsa_mall_mirror_tc_entry *mirror; ifindex = tcf_mirred_ifindex(a); to_dev = __dev_get_by_index(net, ifindex); if (!to_dev) return -EINVAL; if (!dsa_slave_dev_check(to_dev)) return -EOPNOTSUPP; mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); if (!mall_tc_entry) return -ENOMEM; mall_tc_entry->cookie = cls->cookie; mall_tc_entry->type = DSA_PORT_MALL_MIRROR; mirror = &mall_tc_entry->mirror; to_p = netdev_priv(to_dev); mirror->to_local_port = to_p->dp->index; mirror->ingress = ingress; err = ds->ops->port_mirror_add(ds, p->dp->index, mirror, ingress); if (err) { kfree(mall_tc_entry); return err; } list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); } return 0; } static void dsa_slave_del_cls_matchall(struct net_device *dev, struct tc_cls_matchall_offload *cls) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_mall_tc_entry *mall_tc_entry; struct dsa_switch *ds = p->dp->ds; if (!ds->ops->port_mirror_del) return; mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie); if (!mall_tc_entry) return; list_del(&mall_tc_entry->list); switch (mall_tc_entry->type) { case DSA_PORT_MALL_MIRROR: ds->ops->port_mirror_del(ds, p->dp->index, &mall_tc_entry->mirror); break; default: WARN_ON(1); } kfree(mall_tc_entry); } static int dsa_slave_setup_tc(struct net_device *dev, u32 handle, __be16 protocol, struct tc_to_netdev *tc) { bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS); int ret = -EOPNOTSUPP; switch (tc->type) { case TC_SETUP_MATCHALL: switch (tc->cls_mall->command) { case TC_CLSMATCHALL_REPLACE: return dsa_slave_add_cls_matchall(dev, protocol, tc->cls_mall, ingress); case TC_CLSMATCHALL_DESTROY: dsa_slave_del_cls_matchall(dev, tc->cls_mall); return 0; } default: break; } return ret; } void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) { ops->get_sset_count = dsa_cpu_port_get_sset_count; ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; ops->get_strings = dsa_cpu_port_get_strings; } static int dsa_slave_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *nfc, u32 *rule_locs) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->dp->ds; if (!ds->ops->get_rxnfc) return -EOPNOTSUPP; return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs); } static int dsa_slave_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *nfc) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->dp->ds; if (!ds->ops->set_rxnfc) return -EOPNOTSUPP; return ds->ops->set_rxnfc(ds, p->dp->index, nfc); } static const struct ethtool_ops dsa_slave_ethtool_ops = { .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, .get_link_ksettings = dsa_slave_get_link_ksettings, .set_link_ksettings = dsa_slave_set_link_ksettings, .get_rxnfc = dsa_slave_get_rxnfc, .set_rxnfc = dsa_slave_set_rxnfc, }; 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 = switchdev_port_fdb_add, .ndo_fdb_del = switchdev_port_fdb_del, .ndo_fdb_dump = switchdev_port_fdb_dump, .ndo_do_ioctl = dsa_slave_ioctl, .ndo_get_iflink = dsa_slave_get_iflink, #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 .ndo_bridge_getlink = switchdev_port_bridge_getlink, .ndo_bridge_setlink = switchdev_port_bridge_setlink, .ndo_bridge_dellink = switchdev_port_bridge_dellink, .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, .ndo_setup_tc = dsa_slave_setup_tc, }; static const struct switchdev_ops dsa_slave_switchdev_ops = { .switchdev_port_attr_get = dsa_slave_port_attr_get, .switchdev_port_attr_set = dsa_slave_port_attr_set, .switchdev_port_obj_add = dsa_slave_port_obj_add, .switchdev_port_obj_del = dsa_slave_port_obj_del, .switchdev_port_obj_dump = dsa_slave_port_obj_dump, }; static struct device_type dsa_type = { .name = "dsa", }; static void dsa_slave_adjust_link(struct net_device *dev) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->dp->ds; 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->ops->adjust_link && status_changed) ds->ops->adjust_link(ds, p->dp->index, 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; struct dsa_switch *ds; if (dev) { p = netdev_priv(dev); ds = p->dp->ds; if (ds->ops->fixed_link_update) ds->ops->fixed_link_update(ds, p->dp->index, 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->dp->ds; p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); if (!p->phy) { netdev_err(slave_dev, "no phy at %d\n", addr); return -ENODEV; } /* Use already configured phy mode */ if (p->phy_interface == PHY_INTERFACE_MODE_NA) p->phy_interface = p->phy->interface; return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, p->phy_interface); } static int dsa_slave_phy_setup(struct dsa_slave_priv *p, struct net_device *slave_dev) { struct dsa_switch *ds = p->dp->ds; struct device_node *phy_dn, *port_dn; bool phy_is_fixed = false; u32 phy_flags = 0; int mode, ret; port_dn = p->dp->dn; 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 (!phy_dn && 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: %d\n", ret); return ret; } phy_is_fixed = true; phy_dn = of_node_get(port_dn); } if (ds->ops->get_phy_flags) phy_flags = ds->ops->get_phy_flags(ds, p->dp->index); if (phy_dn) { int phy_id = 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 && phy_id >= 0 && (ds->phys_mii_mask & (1 << phy_id))) { ret = dsa_slave_phy_connect(p, slave_dev, phy_id); if (ret) { netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); of_node_put(phy_dn); return ret; } } else { p->phy = of_phy_connect(slave_dev, phy_dn, dsa_slave_adjust_link, phy_flags, p->phy_interface); } of_node_put(phy_dn); } 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->dp->index); if (ret) { netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->dp->index, ret); if (phy_is_fixed) of_phy_deregister_fixed_link(port_dn); return ret; } } phy_attached_info(p->phy); return 0; } 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); } 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, const char *name) { struct dsa_switch_tree *dst = ds->dst; struct net_device *master; struct net_device *slave_dev; struct dsa_slave_priv *p; int ret; master = ds->dst->master_netdev; if (ds->master_netdev) master = ds->master_netdev; 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 | NETIF_F_HW_TC; slave_dev->hw_features |= NETIF_F_HW_TC; slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; eth_hw_addr_inherit(slave_dev, master); slave_dev->priv_flags |= IFF_NO_QUEUE; slave_dev->netdev_ops = &dsa_slave_netdev_ops; slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; slave_dev->min_mtu = 0; slave_dev->max_mtu = ETH_MAX_MTU; SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, NULL); SET_NETDEV_DEV(slave_dev, parent); slave_dev->dev.of_node = ds->ports[port].dn; slave_dev->vlan_features = master->vlan_features; p = netdev_priv(slave_dev); p->dp = &ds->ports[port]; INIT_LIST_HEAD(&p->mall_tc_list); p->xmit = dst->tag_ops->xmit; p->old_pause = -1; p->old_link = -1; p->old_duplex = -1; ds->ports[port].netdev = slave_dev; ret = register_netdev(slave_dev); if (ret) { netdev_err(master, "error %d registering interface %s\n", ret, slave_dev->name); ds->ports[port].netdev = NULL; free_netdev(slave_dev); return ret; } netif_carrier_off(slave_dev); ret = dsa_slave_phy_setup(p, slave_dev); if (ret) { netdev_err(master, "error %d setting up slave phy\n", ret); unregister_netdev(slave_dev); free_netdev(slave_dev); return ret; } return 0; } void dsa_slave_destroy(struct net_device *slave_dev) { struct dsa_slave_priv *p = netdev_priv(slave_dev); struct device_node *port_dn; port_dn = p->dp->dn; netif_carrier_off(slave_dev); if (p->phy) { phy_disconnect(p->phy); if (of_phy_is_fixed_link(port_dn)) of_phy_deregister_fixed_link(port_dn); } unregister_netdev(slave_dev); free_netdev(slave_dev); } static bool dsa_slave_dev_check(struct net_device *dev) { return dev->netdev_ops == &dsa_slave_netdev_ops; } static int dsa_slave_changeupper(struct net_device *dev, struct netdev_notifier_changeupper_info *info) { struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_port *dp = p->dp; int err = NOTIFY_DONE; if (netif_is_bridge_master(info->upper_dev)) { if (info->linking) { err = dsa_port_bridge_join(dp, info->upper_dev); err = notifier_from_errno(err); } else { dsa_port_bridge_leave(dp, info->upper_dev); err = NOTIFY_OK; } } return err; } static int dsa_slave_netdevice_event(struct notifier_block *nb, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); if (dev->netdev_ops != &dsa_slave_netdev_ops) return NOTIFY_DONE; if (event == NETDEV_CHANGEUPPER) return dsa_slave_changeupper(dev, ptr); return NOTIFY_DONE; } static struct notifier_block dsa_slave_nb __read_mostly = { .notifier_call = dsa_slave_netdevice_event, }; int dsa_slave_register_notifier(void) { return register_netdevice_notifier(&dsa_slave_nb); } void dsa_slave_unregister_notifier(void) { int err; err = unregister_netdevice_notifier(&dsa_slave_nb); if (err) pr_err("DSA: failed to unregister slave notifier (%d)\n", err); }