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2570 lines
63 KiB
2570 lines
63 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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*/ |
|
|
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#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/phylink.h> |
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#include <linux/of_net.h> |
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#include <linux/of_mdio.h> |
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#include <linux/mdio.h> |
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#include <net/rtnetlink.h> |
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#include <net/pkt_cls.h> |
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#include <net/selftests.h> |
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#include <net/tc_act/tc_mirred.h> |
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#include <linux/if_bridge.h> |
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#include <linux/if_hsr.h> |
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#include <linux/netpoll.h> |
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|
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#include "dsa_priv.h" |
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|
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/* slave mii_bus handling ***************************************************/ |
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static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) |
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{ |
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struct dsa_switch *ds = bus->priv; |
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|
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if (ds->phys_mii_mask & (1 << addr)) |
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return ds->ops->phy_read(ds, addr, reg); |
|
|
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return 0xffff; |
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} |
|
|
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static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) |
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{ |
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struct dsa_switch *ds = bus->priv; |
|
|
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if (ds->phys_mii_mask & (1 << addr)) |
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return ds->ops->phy_write(ds, addr, reg, val); |
|
|
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return 0; |
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} |
|
|
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void dsa_slave_mii_bus_init(struct dsa_switch *ds) |
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{ |
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ds->slave_mii_bus->priv = (void *)ds; |
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ds->slave_mii_bus->name = "dsa slave smi"; |
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ds->slave_mii_bus->read = dsa_slave_phy_read; |
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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.%d", |
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ds->dst->index, ds->index); |
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ds->slave_mii_bus->parent = ds->dev; |
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ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; |
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} |
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|
|
|
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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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{ |
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return dsa_slave_to_master(dev)->ifindex; |
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} |
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|
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static int dsa_slave_open(struct net_device *dev) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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int err; |
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|
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err = dev_open(master, NULL); |
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if (err < 0) { |
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netdev_err(dev, "failed to open master %s\n", master->name); |
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goto out; |
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} |
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|
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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) |
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goto out; |
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} |
|
|
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if (dev->flags & IFF_ALLMULTI) { |
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err = dev_set_allmulti(master, 1); |
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if (err < 0) |
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goto del_unicast; |
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} |
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if (dev->flags & IFF_PROMISC) { |
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err = dev_set_promiscuity(master, 1); |
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if (err < 0) |
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goto clear_allmulti; |
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} |
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|
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err = dsa_port_enable_rt(dp, dev->phydev); |
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if (err) |
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goto clear_promisc; |
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|
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return 0; |
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|
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clear_promisc: |
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if (dev->flags & IFF_PROMISC) |
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dev_set_promiscuity(master, -1); |
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clear_allmulti: |
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if (dev->flags & IFF_ALLMULTI) |
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dev_set_allmulti(master, -1); |
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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: |
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return err; |
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} |
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|
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static int dsa_slave_close(struct net_device *dev) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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|
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dsa_port_disable_rt(dp); |
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|
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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) |
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dev_set_allmulti(master, -1); |
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if (dev->flags & IFF_PROMISC) |
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dev_set_promiscuity(master, -1); |
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|
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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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|
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return 0; |
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} |
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|
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static void dsa_slave_change_rx_flags(struct net_device *dev, int change) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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if (dev->flags & IFF_UP) { |
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if (change & IFF_ALLMULTI) |
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dev_set_allmulti(master, |
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dev->flags & IFF_ALLMULTI ? 1 : -1); |
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if (change & IFF_PROMISC) |
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dev_set_promiscuity(master, |
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dev->flags & IFF_PROMISC ? 1 : -1); |
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} |
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} |
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|
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static void dsa_slave_set_rx_mode(struct net_device *dev) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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|
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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 net_device *master = dsa_slave_to_master(dev); |
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struct sockaddr *addr = a; |
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int err; |
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|
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if (!is_valid_ether_addr(addr->sa_data)) |
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return -EADDRNOTAVAIL; |
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|
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if (!(dev->flags & IFF_UP)) |
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goto out; |
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|
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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) |
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return err; |
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} |
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|
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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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|
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out: |
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ether_addr_copy(dev->dev_addr, addr->sa_data); |
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|
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return 0; |
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} |
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|
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struct dsa_slave_dump_ctx { |
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struct net_device *dev; |
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struct sk_buff *skb; |
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struct netlink_callback *cb; |
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int idx; |
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}; |
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|
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static int |
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dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, |
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bool is_static, void *data) |
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{ |
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struct dsa_slave_dump_ctx *dump = data; |
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u32 portid = NETLINK_CB(dump->cb->skb).portid; |
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u32 seq = dump->cb->nlh->nlmsg_seq; |
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struct nlmsghdr *nlh; |
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struct ndmsg *ndm; |
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|
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if (dump->idx < dump->cb->args[2]) |
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goto skip; |
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|
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nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, |
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sizeof(*ndm), NLM_F_MULTI); |
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if (!nlh) |
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return -EMSGSIZE; |
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|
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ndm = nlmsg_data(nlh); |
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ndm->ndm_family = AF_BRIDGE; |
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ndm->ndm_pad1 = 0; |
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ndm->ndm_pad2 = 0; |
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ndm->ndm_flags = NTF_SELF; |
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ndm->ndm_type = 0; |
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ndm->ndm_ifindex = dump->dev->ifindex; |
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ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; |
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|
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if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) |
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goto nla_put_failure; |
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|
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if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) |
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goto nla_put_failure; |
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|
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nlmsg_end(dump->skb, nlh); |
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|
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skip: |
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dump->idx++; |
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return 0; |
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|
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nla_put_failure: |
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nlmsg_cancel(dump->skb, nlh); |
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return -EMSGSIZE; |
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} |
|
|
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static int |
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dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, |
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struct net_device *dev, struct net_device *filter_dev, |
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int *idx) |
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{ |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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struct dsa_slave_dump_ctx dump = { |
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.dev = dev, |
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.skb = skb, |
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.cb = cb, |
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.idx = *idx, |
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}; |
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int err; |
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|
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err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); |
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*idx = dump.idx; |
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|
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return err; |
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} |
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|
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static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
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{ |
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struct dsa_slave_priv *p = netdev_priv(dev); |
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struct dsa_switch *ds = p->dp->ds; |
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int port = p->dp->index; |
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|
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/* Pass through to switch driver if it supports timestamping */ |
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switch (cmd) { |
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case SIOCGHWTSTAMP: |
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if (ds->ops->port_hwtstamp_get) |
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return ds->ops->port_hwtstamp_get(ds, port, ifr); |
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break; |
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case SIOCSHWTSTAMP: |
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if (ds->ops->port_hwtstamp_set) |
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return ds->ops->port_hwtstamp_set(ds, port, ifr); |
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break; |
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} |
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|
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return phylink_mii_ioctl(p->dp->pl, ifr, cmd); |
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} |
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|
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static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, |
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const struct switchdev_attr *attr, |
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struct netlink_ext_ack *extack) |
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{ |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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int ret; |
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|
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if (ctx && ctx != dp) |
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return 0; |
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switch (attr->id) { |
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case SWITCHDEV_ATTR_ID_PORT_STP_STATE: |
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if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) |
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return -EOPNOTSUPP; |
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ret = dsa_port_set_state(dp, attr->u.stp_state); |
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break; |
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case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: |
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if (!dsa_port_offloads_bridge(dp, attr->orig_dev)) |
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return -EOPNOTSUPP; |
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|
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ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, |
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extack); |
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break; |
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case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: |
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if (!dsa_port_offloads_bridge(dp, attr->orig_dev)) |
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return -EOPNOTSUPP; |
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|
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ret = dsa_port_ageing_time(dp, attr->u.ageing_time); |
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break; |
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case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: |
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if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) |
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return -EOPNOTSUPP; |
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|
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ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, |
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extack); |
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break; |
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case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: |
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if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) |
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return -EOPNOTSUPP; |
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ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); |
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break; |
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default: |
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ret = -EOPNOTSUPP; |
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break; |
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} |
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return ret; |
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} |
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/* Must be called under rcu_read_lock() */ |
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static int |
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dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, |
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const struct switchdev_obj_port_vlan *vlan) |
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{ |
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struct net_device *upper_dev; |
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struct list_head *iter; |
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netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { |
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u16 vid; |
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|
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if (!is_vlan_dev(upper_dev)) |
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continue; |
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vid = vlan_dev_vlan_id(upper_dev); |
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if (vid == vlan->vid) |
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return -EBUSY; |
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} |
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|
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return 0; |
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} |
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|
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static int dsa_slave_vlan_add(struct net_device *dev, |
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const struct switchdev_obj *obj, |
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struct netlink_ext_ack *extack) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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struct switchdev_obj_port_vlan vlan; |
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int err; |
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|
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if (dsa_port_skip_vlan_configuration(dp)) { |
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NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); |
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return 0; |
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} |
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|
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vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); |
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|
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/* Deny adding a bridge VLAN when there is already an 802.1Q upper with |
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* the same VID. |
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*/ |
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if (br_vlan_enabled(dp->bridge_dev)) { |
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rcu_read_lock(); |
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err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); |
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rcu_read_unlock(); |
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if (err) { |
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NL_SET_ERR_MSG_MOD(extack, |
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"Port already has a VLAN upper with this VID"); |
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return err; |
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} |
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} |
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|
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err = dsa_port_vlan_add(dp, &vlan, extack); |
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if (err) |
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return err; |
|
|
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/* We need the dedicated CPU port to be a member of the VLAN as well. |
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* Even though drivers often handle CPU membership in special ways, |
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* it doesn't make sense to program a PVID, so clear this flag. |
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*/ |
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vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; |
|
|
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err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack); |
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if (err) |
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return err; |
|
|
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return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid); |
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} |
|
|
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static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, |
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const struct switchdev_obj *obj, |
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struct netlink_ext_ack *extack) |
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{ |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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int err; |
|
|
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if (ctx && ctx != dp) |
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return 0; |
|
|
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switch (obj->id) { |
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case SWITCHDEV_OBJ_ID_PORT_MDB: |
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if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) |
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return -EOPNOTSUPP; |
|
|
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err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); |
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break; |
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case SWITCHDEV_OBJ_ID_HOST_MDB: |
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if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
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return -EOPNOTSUPP; |
|
|
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err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); |
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break; |
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case SWITCHDEV_OBJ_ID_PORT_VLAN: |
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if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) |
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return -EOPNOTSUPP; |
|
|
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err = dsa_slave_vlan_add(dev, obj, extack); |
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break; |
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case SWITCHDEV_OBJ_ID_MRP: |
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if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
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return -EOPNOTSUPP; |
|
|
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err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); |
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break; |
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case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: |
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if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
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return -EOPNOTSUPP; |
|
|
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err = dsa_port_mrp_add_ring_role(dp, |
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SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); |
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break; |
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default: |
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err = -EOPNOTSUPP; |
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break; |
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} |
|
|
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return err; |
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} |
|
|
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static int dsa_slave_vlan_del(struct net_device *dev, |
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const struct switchdev_obj *obj) |
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{ |
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struct net_device *master = dsa_slave_to_master(dev); |
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struct dsa_port *dp = dsa_slave_to_port(dev); |
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struct switchdev_obj_port_vlan *vlan; |
|
int err; |
|
|
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if (dsa_port_skip_vlan_configuration(dp)) |
|
return 0; |
|
|
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vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); |
|
|
|
/* Do not deprogram the CPU port as it may be shared with other user |
|
* ports which can be members of this VLAN as well. |
|
*/ |
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err = dsa_port_vlan_del(dp, vlan); |
|
if (err) |
|
return err; |
|
|
|
vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid); |
|
|
|
return 0; |
|
} |
|
|
|
static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, |
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const struct switchdev_obj *obj) |
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{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
int err; |
|
|
|
if (ctx && ctx != dp) |
|
return 0; |
|
|
|
switch (obj->id) { |
|
case SWITCHDEV_OBJ_ID_PORT_MDB: |
|
if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) |
|
return -EOPNOTSUPP; |
|
|
|
err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); |
|
break; |
|
case SWITCHDEV_OBJ_ID_HOST_MDB: |
|
if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
|
return -EOPNOTSUPP; |
|
|
|
err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); |
|
break; |
|
case SWITCHDEV_OBJ_ID_PORT_VLAN: |
|
if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) |
|
return -EOPNOTSUPP; |
|
|
|
err = dsa_slave_vlan_del(dev, obj); |
|
break; |
|
case SWITCHDEV_OBJ_ID_MRP: |
|
if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
|
return -EOPNOTSUPP; |
|
|
|
err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); |
|
break; |
|
case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: |
|
if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) |
|
return -EOPNOTSUPP; |
|
|
|
err = dsa_port_mrp_del_ring_role(dp, |
|
SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); |
|
break; |
|
default: |
|
err = -EOPNOTSUPP; |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int dsa_slave_get_port_parent_id(struct net_device *dev, |
|
struct netdev_phys_item_id *ppid) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
struct dsa_switch_tree *dst = ds->dst; |
|
|
|
/* For non-legacy ports, devlink is used and it takes |
|
* care of the name generation. This ndo implementation |
|
* should be removed with legacy support. |
|
*/ |
|
if (dp->ds->devlink) |
|
return -EOPNOTSUPP; |
|
|
|
ppid->id_len = sizeof(dst->index); |
|
memcpy(&ppid->id, &dst->index, ppid->id_len); |
|
|
|
return 0; |
|
} |
|
|
|
static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, |
|
struct sk_buff *skb) |
|
{ |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
|
|
return netpoll_send_skb(p->netpoll, skb); |
|
#else |
|
BUG(); |
|
return NETDEV_TX_OK; |
|
#endif |
|
} |
|
|
|
static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, |
|
struct sk_buff *skb) |
|
{ |
|
struct dsa_switch *ds = p->dp->ds; |
|
|
|
if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) |
|
return; |
|
|
|
if (!ds->ops->port_txtstamp) |
|
return; |
|
|
|
ds->ops->port_txtstamp(ds, p->dp->index, skb); |
|
} |
|
|
|
netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
/* 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_slave_netpoll_send_skb(dev, skb); |
|
|
|
/* Queue the SKB for transmission on the parent interface, but |
|
* do not modify its EtherType |
|
*/ |
|
skb->dev = dsa_slave_to_master(dev); |
|
dev_queue_xmit(skb); |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
EXPORT_SYMBOL_GPL(dsa_enqueue_skb); |
|
|
|
static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
int needed_headroom = dev->needed_headroom; |
|
int needed_tailroom = dev->needed_tailroom; |
|
|
|
/* For tail taggers, we need to pad short frames ourselves, to ensure |
|
* that the tail tag does not fail at its role of being at the end of |
|
* the packet, once the master interface pads the frame. Account for |
|
* that pad length here, and pad later. |
|
*/ |
|
if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) |
|
needed_tailroom += ETH_ZLEN - skb->len; |
|
/* skb_headroom() returns unsigned int... */ |
|
needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); |
|
needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); |
|
|
|
if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) |
|
/* No reallocation needed, yay! */ |
|
return 0; |
|
|
|
return pskb_expand_head(skb, needed_headroom, needed_tailroom, |
|
GFP_ATOMIC); |
|
} |
|
|
|
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_sw_netstats_tx_add(dev, 1, skb->len); |
|
|
|
memset(skb->cb, 0, sizeof(skb->cb)); |
|
|
|
/* Handle tx timestamp if any */ |
|
dsa_skb_tx_timestamp(p, skb); |
|
|
|
if (dsa_realloc_skb(skb, dev)) { |
|
dev_kfree_skb_any(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
/* needed_tailroom should still be 'warm' in the cache line from |
|
* dsa_realloc_skb(), which has also ensured that padding is safe. |
|
*/ |
|
if (dev->needed_tailroom) |
|
eth_skb_pad(skb); |
|
|
|
/* Transmit function may have to reallocate the original SKB, |
|
* in which case it must have freed it. Only free it here on error. |
|
*/ |
|
nskb = p->xmit(skb, dev); |
|
if (!nskb) { |
|
kfree_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
return dsa_enqueue_skb(nskb, dev); |
|
} |
|
|
|
/* ethtool operations *******************************************************/ |
|
|
|
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_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (ds->ops->get_regs_len) |
|
return ds->ops->get_regs_len(ds, dp->index); |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static void |
|
dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (ds->ops->get_regs) |
|
ds->ops->get_regs(ds, dp->index, regs, _p); |
|
} |
|
|
|
static int dsa_slave_nway_reset(struct net_device *dev) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
return phylink_ethtool_nway_reset(dp->pl); |
|
} |
|
|
|
static int dsa_slave_get_eeprom_len(struct net_device *dev) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = 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_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = 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_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = 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_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = 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, dp->index, stringset, |
|
data + 4 * len); |
|
} else if (stringset == ETH_SS_TEST) { |
|
net_selftest_get_strings(data); |
|
} |
|
|
|
} |
|
|
|
static void dsa_slave_get_ethtool_stats(struct net_device *dev, |
|
struct ethtool_stats *stats, |
|
uint64_t *data) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
struct pcpu_sw_netstats *s; |
|
unsigned int start; |
|
int i; |
|
|
|
for_each_possible_cpu(i) { |
|
u64 tx_packets, tx_bytes, rx_packets, rx_bytes; |
|
|
|
s = per_cpu_ptr(dev->tstats, i); |
|
do { |
|
start = u64_stats_fetch_begin_irq(&s->syncp); |
|
tx_packets = s->tx_packets; |
|
tx_bytes = s->tx_bytes; |
|
rx_packets = s->rx_packets; |
|
rx_bytes = s->rx_bytes; |
|
} while (u64_stats_fetch_retry_irq(&s->syncp, start)); |
|
data[0] += tx_packets; |
|
data[1] += tx_bytes; |
|
data[2] += rx_packets; |
|
data[3] += rx_bytes; |
|
} |
|
if (ds->ops->get_ethtool_stats) |
|
ds->ops->get_ethtool_stats(ds, dp->index, data + 4); |
|
} |
|
|
|
static int dsa_slave_get_sset_count(struct net_device *dev, int sset) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (sset == ETH_SS_STATS) { |
|
int count = 0; |
|
|
|
if (ds->ops->get_sset_count) { |
|
count = ds->ops->get_sset_count(ds, dp->index, sset); |
|
if (count < 0) |
|
return count; |
|
} |
|
|
|
return count + 4; |
|
} else if (sset == ETH_SS_TEST) { |
|
return net_selftest_get_count(); |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static void dsa_slave_net_selftest(struct net_device *ndev, |
|
struct ethtool_test *etest, u64 *buf) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(ndev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (ds->ops->self_test) { |
|
ds->ops->self_test(ds, dp->index, etest, buf); |
|
return; |
|
} |
|
|
|
net_selftest(ndev, etest, buf); |
|
} |
|
|
|
static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
phylink_ethtool_get_wol(dp->pl, w); |
|
|
|
if (ds->ops->get_wol) |
|
ds->ops->get_wol(ds, dp->index, w); |
|
} |
|
|
|
static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int ret = -EOPNOTSUPP; |
|
|
|
phylink_ethtool_set_wol(dp->pl, w); |
|
|
|
if (ds->ops->set_wol) |
|
ret = ds->ops->set_wol(ds, dp->index, w); |
|
|
|
return ret; |
|
} |
|
|
|
static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int ret; |
|
|
|
/* Port's PHY and MAC both need to be EEE capable */ |
|
if (!dev->phydev || !dp->pl) |
|
return -ENODEV; |
|
|
|
if (!ds->ops->set_mac_eee) |
|
return -EOPNOTSUPP; |
|
|
|
ret = ds->ops->set_mac_eee(ds, dp->index, e); |
|
if (ret) |
|
return ret; |
|
|
|
return phylink_ethtool_set_eee(dp->pl, e); |
|
} |
|
|
|
static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int ret; |
|
|
|
/* Port's PHY and MAC both need to be EEE capable */ |
|
if (!dev->phydev || !dp->pl) |
|
return -ENODEV; |
|
|
|
if (!ds->ops->get_mac_eee) |
|
return -EOPNOTSUPP; |
|
|
|
ret = ds->ops->get_mac_eee(ds, dp->index, e); |
|
if (ret) |
|
return ret; |
|
|
|
return phylink_ethtool_get_eee(dp->pl, e); |
|
} |
|
|
|
static int dsa_slave_get_link_ksettings(struct net_device *dev, |
|
struct ethtool_link_ksettings *cmd) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
return phylink_ethtool_ksettings_get(dp->pl, cmd); |
|
} |
|
|
|
static int dsa_slave_set_link_ksettings(struct net_device *dev, |
|
const struct ethtool_link_ksettings *cmd) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
return phylink_ethtool_ksettings_set(dp->pl, cmd); |
|
} |
|
|
|
static void dsa_slave_get_pauseparam(struct net_device *dev, |
|
struct ethtool_pauseparam *pause) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
phylink_ethtool_get_pauseparam(dp->pl, pause); |
|
} |
|
|
|
static int dsa_slave_set_pauseparam(struct net_device *dev, |
|
struct ethtool_pauseparam *pause) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
return phylink_ethtool_set_pauseparam(dp->pl, pause); |
|
} |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
static int dsa_slave_netpoll_setup(struct net_device *dev, |
|
struct netpoll_info *ni) |
|
{ |
|
struct net_device *master = dsa_slave_to_master(dev); |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
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(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_port *dp = dsa_slave_to_port(dev); |
|
|
|
/* For non-legacy ports, devlink is used and it takes |
|
* care of the name generation. This ndo implementation |
|
* should be removed with legacy support. |
|
*/ |
|
if (dp->ds->devlink) |
|
return -EOPNOTSUPP; |
|
|
|
if (snprintf(name, len, "p%d", dp->index) >= len) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static struct dsa_mall_tc_entry * |
|
dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) |
|
{ |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
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_mirred(struct net_device *dev, |
|
struct tc_cls_matchall_offload *cls, |
|
bool ingress) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
struct dsa_mall_mirror_tc_entry *mirror; |
|
struct dsa_mall_tc_entry *mall_tc_entry; |
|
struct dsa_switch *ds = dp->ds; |
|
struct flow_action_entry *act; |
|
struct dsa_port *to_dp; |
|
int err; |
|
|
|
if (!ds->ops->port_mirror_add) |
|
return -EOPNOTSUPP; |
|
|
|
if (!flow_action_basic_hw_stats_check(&cls->rule->action, |
|
cls->common.extack)) |
|
return -EOPNOTSUPP; |
|
|
|
act = &cls->rule->action.entries[0]; |
|
|
|
if (!act->dev) |
|
return -EINVAL; |
|
|
|
if (!dsa_slave_dev_check(act->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_dp = dsa_slave_to_port(act->dev); |
|
|
|
mirror->to_local_port = to_dp->index; |
|
mirror->ingress = ingress; |
|
|
|
err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); |
|
if (err) { |
|
kfree(mall_tc_entry); |
|
return err; |
|
} |
|
|
|
list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); |
|
|
|
return err; |
|
} |
|
|
|
static int |
|
dsa_slave_add_cls_matchall_police(struct net_device *dev, |
|
struct tc_cls_matchall_offload *cls, |
|
bool ingress) |
|
{ |
|
struct netlink_ext_ack *extack = cls->common.extack; |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
struct dsa_mall_policer_tc_entry *policer; |
|
struct dsa_mall_tc_entry *mall_tc_entry; |
|
struct dsa_switch *ds = dp->ds; |
|
struct flow_action_entry *act; |
|
int err; |
|
|
|
if (!ds->ops->port_policer_add) { |
|
NL_SET_ERR_MSG_MOD(extack, |
|
"Policing offload not implemented"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (!ingress) { |
|
NL_SET_ERR_MSG_MOD(extack, |
|
"Only supported on ingress qdisc"); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (!flow_action_basic_hw_stats_check(&cls->rule->action, |
|
cls->common.extack)) |
|
return -EOPNOTSUPP; |
|
|
|
list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { |
|
if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { |
|
NL_SET_ERR_MSG_MOD(extack, |
|
"Only one port policer allowed"); |
|
return -EEXIST; |
|
} |
|
} |
|
|
|
act = &cls->rule->action.entries[0]; |
|
|
|
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_POLICER; |
|
policer = &mall_tc_entry->policer; |
|
policer->rate_bytes_per_sec = act->police.rate_bytes_ps; |
|
policer->burst = act->police.burst; |
|
|
|
err = ds->ops->port_policer_add(ds, dp->index, policer); |
|
if (err) { |
|
kfree(mall_tc_entry); |
|
return err; |
|
} |
|
|
|
list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); |
|
|
|
return err; |
|
} |
|
|
|
static int dsa_slave_add_cls_matchall(struct net_device *dev, |
|
struct tc_cls_matchall_offload *cls, |
|
bool ingress) |
|
{ |
|
int err = -EOPNOTSUPP; |
|
|
|
if (cls->common.protocol == htons(ETH_P_ALL) && |
|
flow_offload_has_one_action(&cls->rule->action) && |
|
cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) |
|
err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); |
|
else if (flow_offload_has_one_action(&cls->rule->action) && |
|
cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) |
|
err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); |
|
|
|
return err; |
|
} |
|
|
|
static void dsa_slave_del_cls_matchall(struct net_device *dev, |
|
struct tc_cls_matchall_offload *cls) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_mall_tc_entry *mall_tc_entry; |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); |
|
if (!mall_tc_entry) |
|
return; |
|
|
|
list_del(&mall_tc_entry->list); |
|
|
|
switch (mall_tc_entry->type) { |
|
case DSA_PORT_MALL_MIRROR: |
|
if (ds->ops->port_mirror_del) |
|
ds->ops->port_mirror_del(ds, dp->index, |
|
&mall_tc_entry->mirror); |
|
break; |
|
case DSA_PORT_MALL_POLICER: |
|
if (ds->ops->port_policer_del) |
|
ds->ops->port_policer_del(ds, dp->index); |
|
break; |
|
default: |
|
WARN_ON(1); |
|
} |
|
|
|
kfree(mall_tc_entry); |
|
} |
|
|
|
static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, |
|
struct tc_cls_matchall_offload *cls, |
|
bool ingress) |
|
{ |
|
if (cls->common.chain_index) |
|
return -EOPNOTSUPP; |
|
|
|
switch (cls->command) { |
|
case TC_CLSMATCHALL_REPLACE: |
|
return dsa_slave_add_cls_matchall(dev, cls, ingress); |
|
case TC_CLSMATCHALL_DESTROY: |
|
dsa_slave_del_cls_matchall(dev, cls); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int dsa_slave_add_cls_flower(struct net_device *dev, |
|
struct flow_cls_offload *cls, |
|
bool ingress) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int port = dp->index; |
|
|
|
if (!ds->ops->cls_flower_add) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->cls_flower_add(ds, port, cls, ingress); |
|
} |
|
|
|
static int dsa_slave_del_cls_flower(struct net_device *dev, |
|
struct flow_cls_offload *cls, |
|
bool ingress) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int port = dp->index; |
|
|
|
if (!ds->ops->cls_flower_del) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->cls_flower_del(ds, port, cls, ingress); |
|
} |
|
|
|
static int dsa_slave_stats_cls_flower(struct net_device *dev, |
|
struct flow_cls_offload *cls, |
|
bool ingress) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
int port = dp->index; |
|
|
|
if (!ds->ops->cls_flower_stats) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->cls_flower_stats(ds, port, cls, ingress); |
|
} |
|
|
|
static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, |
|
struct flow_cls_offload *cls, |
|
bool ingress) |
|
{ |
|
switch (cls->command) { |
|
case FLOW_CLS_REPLACE: |
|
return dsa_slave_add_cls_flower(dev, cls, ingress); |
|
case FLOW_CLS_DESTROY: |
|
return dsa_slave_del_cls_flower(dev, cls, ingress); |
|
case FLOW_CLS_STATS: |
|
return dsa_slave_stats_cls_flower(dev, cls, ingress); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, |
|
void *cb_priv, bool ingress) |
|
{ |
|
struct net_device *dev = cb_priv; |
|
|
|
if (!tc_can_offload(dev)) |
|
return -EOPNOTSUPP; |
|
|
|
switch (type) { |
|
case TC_SETUP_CLSMATCHALL: |
|
return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); |
|
case TC_SETUP_CLSFLOWER: |
|
return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, |
|
void *type_data, void *cb_priv) |
|
{ |
|
return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); |
|
} |
|
|
|
static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, |
|
void *type_data, void *cb_priv) |
|
{ |
|
return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); |
|
} |
|
|
|
static LIST_HEAD(dsa_slave_block_cb_list); |
|
|
|
static int dsa_slave_setup_tc_block(struct net_device *dev, |
|
struct flow_block_offload *f) |
|
{ |
|
struct flow_block_cb *block_cb; |
|
flow_setup_cb_t *cb; |
|
|
|
if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) |
|
cb = dsa_slave_setup_tc_block_cb_ig; |
|
else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) |
|
cb = dsa_slave_setup_tc_block_cb_eg; |
|
else |
|
return -EOPNOTSUPP; |
|
|
|
f->driver_block_list = &dsa_slave_block_cb_list; |
|
|
|
switch (f->command) { |
|
case FLOW_BLOCK_BIND: |
|
if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) |
|
return -EBUSY; |
|
|
|
block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); |
|
if (IS_ERR(block_cb)) |
|
return PTR_ERR(block_cb); |
|
|
|
flow_block_cb_add(block_cb, f); |
|
list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); |
|
return 0; |
|
case FLOW_BLOCK_UNBIND: |
|
block_cb = flow_block_cb_lookup(f->block, cb, dev); |
|
if (!block_cb) |
|
return -ENOENT; |
|
|
|
flow_block_cb_remove(block_cb, f); |
|
list_del(&block_cb->driver_list); |
|
return 0; |
|
default: |
|
return -EOPNOTSUPP; |
|
} |
|
} |
|
|
|
static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, |
|
void *type_data) |
|
{ |
|
struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp; |
|
struct net_device *master = cpu_dp->master; |
|
|
|
if (!master->netdev_ops->ndo_setup_tc) |
|
return -EOPNOTSUPP; |
|
|
|
return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); |
|
} |
|
|
|
static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, |
|
void *type_data) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
switch (type) { |
|
case TC_SETUP_BLOCK: |
|
return dsa_slave_setup_tc_block(dev, type_data); |
|
case TC_SETUP_FT: |
|
return dsa_slave_setup_ft_block(ds, dp->index, type_data); |
|
default: |
|
break; |
|
} |
|
|
|
if (!ds->ops->port_setup_tc) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->port_setup_tc(ds, dp->index, type, type_data); |
|
} |
|
|
|
static int dsa_slave_get_rxnfc(struct net_device *dev, |
|
struct ethtool_rxnfc *nfc, u32 *rule_locs) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (!ds->ops->get_rxnfc) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); |
|
} |
|
|
|
static int dsa_slave_set_rxnfc(struct net_device *dev, |
|
struct ethtool_rxnfc *nfc) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (!ds->ops->set_rxnfc) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->set_rxnfc(ds, dp->index, nfc); |
|
} |
|
|
|
static int dsa_slave_get_ts_info(struct net_device *dev, |
|
struct ethtool_ts_info *ts) |
|
{ |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
struct dsa_switch *ds = p->dp->ds; |
|
|
|
if (!ds->ops->get_ts_info) |
|
return -EOPNOTSUPP; |
|
|
|
return ds->ops->get_ts_info(ds, p->dp->index, ts); |
|
} |
|
|
|
static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, |
|
u16 vid) |
|
{ |
|
struct net_device *master = dsa_slave_to_master(dev); |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct switchdev_obj_port_vlan vlan = { |
|
.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, |
|
.vid = vid, |
|
/* This API only allows programming tagged, non-PVID VIDs */ |
|
.flags = 0, |
|
}; |
|
struct netlink_ext_ack extack = {0}; |
|
int ret; |
|
|
|
/* User port... */ |
|
ret = dsa_port_vlan_add(dp, &vlan, &extack); |
|
if (ret) { |
|
if (extack._msg) |
|
netdev_err(dev, "%s\n", extack._msg); |
|
return ret; |
|
} |
|
|
|
/* And CPU port... */ |
|
ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack); |
|
if (ret) { |
|
if (extack._msg) |
|
netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, |
|
extack._msg); |
|
return ret; |
|
} |
|
|
|
return vlan_vid_add(master, proto, vid); |
|
} |
|
|
|
static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, |
|
u16 vid) |
|
{ |
|
struct net_device *master = dsa_slave_to_master(dev); |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct switchdev_obj_port_vlan vlan = { |
|
.vid = vid, |
|
/* This API only allows programming tagged, non-PVID VIDs */ |
|
.flags = 0, |
|
}; |
|
int err; |
|
|
|
/* Do not deprogram the CPU port as it may be shared with other user |
|
* ports which can be members of this VLAN as well. |
|
*/ |
|
err = dsa_port_vlan_del(dp, &vlan); |
|
if (err) |
|
return err; |
|
|
|
vlan_vid_del(master, proto, vid); |
|
|
|
return 0; |
|
} |
|
|
|
struct dsa_hw_port { |
|
struct list_head list; |
|
struct net_device *dev; |
|
int old_mtu; |
|
}; |
|
|
|
static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) |
|
{ |
|
const struct dsa_hw_port *p; |
|
int err; |
|
|
|
list_for_each_entry(p, hw_port_list, list) { |
|
if (p->dev->mtu == mtu) |
|
continue; |
|
|
|
err = dev_set_mtu(p->dev, mtu); |
|
if (err) |
|
goto rollback; |
|
} |
|
|
|
return 0; |
|
|
|
rollback: |
|
list_for_each_entry_continue_reverse(p, hw_port_list, list) { |
|
if (p->dev->mtu == p->old_mtu) |
|
continue; |
|
|
|
if (dev_set_mtu(p->dev, p->old_mtu)) |
|
netdev_err(p->dev, "Failed to restore MTU\n"); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static void dsa_hw_port_list_free(struct list_head *hw_port_list) |
|
{ |
|
struct dsa_hw_port *p, *n; |
|
|
|
list_for_each_entry_safe(p, n, hw_port_list, list) |
|
kfree(p); |
|
} |
|
|
|
/* Make the hardware datapath to/from @dev limited to a common MTU */ |
|
static void dsa_bridge_mtu_normalization(struct dsa_port *dp) |
|
{ |
|
struct list_head hw_port_list; |
|
struct dsa_switch_tree *dst; |
|
int min_mtu = ETH_MAX_MTU; |
|
struct dsa_port *other_dp; |
|
int err; |
|
|
|
if (!dp->ds->mtu_enforcement_ingress) |
|
return; |
|
|
|
if (!dp->bridge_dev) |
|
return; |
|
|
|
INIT_LIST_HEAD(&hw_port_list); |
|
|
|
/* Populate the list of ports that are part of the same bridge |
|
* as the newly added/modified port |
|
*/ |
|
list_for_each_entry(dst, &dsa_tree_list, list) { |
|
list_for_each_entry(other_dp, &dst->ports, list) { |
|
struct dsa_hw_port *hw_port; |
|
struct net_device *slave; |
|
|
|
if (other_dp->type != DSA_PORT_TYPE_USER) |
|
continue; |
|
|
|
if (other_dp->bridge_dev != dp->bridge_dev) |
|
continue; |
|
|
|
if (!other_dp->ds->mtu_enforcement_ingress) |
|
continue; |
|
|
|
slave = other_dp->slave; |
|
|
|
if (min_mtu > slave->mtu) |
|
min_mtu = slave->mtu; |
|
|
|
hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); |
|
if (!hw_port) |
|
goto out; |
|
|
|
hw_port->dev = slave; |
|
hw_port->old_mtu = slave->mtu; |
|
|
|
list_add(&hw_port->list, &hw_port_list); |
|
} |
|
} |
|
|
|
/* Attempt to configure the entire hardware bridge to the newly added |
|
* interface's MTU first, regardless of whether the intention of the |
|
* user was to raise or lower it. |
|
*/ |
|
err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); |
|
if (!err) |
|
goto out; |
|
|
|
/* Clearly that didn't work out so well, so just set the minimum MTU on |
|
* all hardware bridge ports now. If this fails too, then all ports will |
|
* still have their old MTU rolled back anyway. |
|
*/ |
|
dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); |
|
|
|
out: |
|
dsa_hw_port_list_free(&hw_port_list); |
|
} |
|
|
|
int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) |
|
{ |
|
struct net_device *master = dsa_slave_to_master(dev); |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_slave_priv *p = netdev_priv(dev); |
|
struct dsa_switch *ds = p->dp->ds; |
|
struct dsa_port *dp_iter; |
|
struct dsa_port *cpu_dp; |
|
int port = p->dp->index; |
|
int largest_mtu = 0; |
|
int new_master_mtu; |
|
int old_master_mtu; |
|
int mtu_limit; |
|
int cpu_mtu; |
|
int err; |
|
|
|
if (!ds->ops->port_change_mtu) |
|
return -EOPNOTSUPP; |
|
|
|
list_for_each_entry(dp_iter, &ds->dst->ports, list) { |
|
int slave_mtu; |
|
|
|
if (!dsa_port_is_user(dp_iter)) |
|
continue; |
|
|
|
/* During probe, this function will be called for each slave |
|
* device, while not all of them have been allocated. That's |
|
* ok, it doesn't change what the maximum is, so ignore it. |
|
*/ |
|
if (!dp_iter->slave) |
|
continue; |
|
|
|
/* Pretend that we already applied the setting, which we |
|
* actually haven't (still haven't done all integrity checks) |
|
*/ |
|
if (dp_iter == dp) |
|
slave_mtu = new_mtu; |
|
else |
|
slave_mtu = dp_iter->slave->mtu; |
|
|
|
if (largest_mtu < slave_mtu) |
|
largest_mtu = slave_mtu; |
|
} |
|
|
|
cpu_dp = dsa_to_port(ds, port)->cpu_dp; |
|
|
|
mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); |
|
old_master_mtu = master->mtu; |
|
new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); |
|
if (new_master_mtu > mtu_limit) |
|
return -ERANGE; |
|
|
|
/* If the master MTU isn't over limit, there's no need to check the CPU |
|
* MTU, since that surely isn't either. |
|
*/ |
|
cpu_mtu = largest_mtu; |
|
|
|
/* Start applying stuff */ |
|
if (new_master_mtu != old_master_mtu) { |
|
err = dev_set_mtu(master, new_master_mtu); |
|
if (err < 0) |
|
goto out_master_failed; |
|
|
|
/* We only need to propagate the MTU of the CPU port to |
|
* upstream switches, so create a non-targeted notifier which |
|
* updates all switches. |
|
*/ |
|
err = dsa_port_mtu_change(cpu_dp, cpu_mtu, false); |
|
if (err) |
|
goto out_cpu_failed; |
|
} |
|
|
|
err = dsa_port_mtu_change(dp, new_mtu, true); |
|
if (err) |
|
goto out_port_failed; |
|
|
|
dev->mtu = new_mtu; |
|
|
|
dsa_bridge_mtu_normalization(dp); |
|
|
|
return 0; |
|
|
|
out_port_failed: |
|
if (new_master_mtu != old_master_mtu) |
|
dsa_port_mtu_change(cpu_dp, old_master_mtu - |
|
dsa_tag_protocol_overhead(cpu_dp->tag_ops), |
|
false); |
|
out_cpu_failed: |
|
if (new_master_mtu != old_master_mtu) |
|
dev_set_mtu(master, old_master_mtu); |
|
out_master_failed: |
|
return err; |
|
} |
|
|
|
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 = ethtool_op_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_pauseparam = dsa_slave_get_pauseparam, |
|
.set_pauseparam = dsa_slave_set_pauseparam, |
|
.get_rxnfc = dsa_slave_get_rxnfc, |
|
.set_rxnfc = dsa_slave_set_rxnfc, |
|
.get_ts_info = dsa_slave_get_ts_info, |
|
.self_test = dsa_slave_net_selftest, |
|
}; |
|
|
|
static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
|
|
return dp->ds->devlink ? &dp->devlink_port : NULL; |
|
} |
|
|
|
static void dsa_slave_get_stats64(struct net_device *dev, |
|
struct rtnl_link_stats64 *s) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
if (ds->ops->get_stats64) |
|
ds->ops->get_stats64(ds, dp->index, s); |
|
else |
|
dev_get_tstats64(dev, s); |
|
} |
|
|
|
static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, |
|
struct net_device_path *path) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(ctx->dev); |
|
struct dsa_port *cpu_dp = dp->cpu_dp; |
|
|
|
path->dev = ctx->dev; |
|
path->type = DEV_PATH_DSA; |
|
path->dsa.proto = cpu_dp->tag_ops->proto; |
|
path->dsa.port = dp->index; |
|
ctx->dev = cpu_dp->master; |
|
|
|
return 0; |
|
} |
|
|
|
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_dump = dsa_slave_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_get_phys_port_name = dsa_slave_get_phys_port_name, |
|
.ndo_setup_tc = dsa_slave_setup_tc, |
|
.ndo_get_stats64 = dsa_slave_get_stats64, |
|
.ndo_get_port_parent_id = dsa_slave_get_port_parent_id, |
|
.ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, |
|
.ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, |
|
.ndo_get_devlink_port = dsa_slave_get_devlink_port, |
|
.ndo_change_mtu = dsa_slave_change_mtu, |
|
.ndo_fill_forward_path = dsa_slave_fill_forward_path, |
|
}; |
|
|
|
static struct device_type dsa_type = { |
|
.name = "dsa", |
|
}; |
|
|
|
void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) |
|
{ |
|
const struct dsa_port *dp = dsa_to_port(ds, port); |
|
|
|
if (dp->pl) |
|
phylink_mac_change(dp->pl, up); |
|
} |
|
EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); |
|
|
|
static void dsa_slave_phylink_fixed_state(struct phylink_config *config, |
|
struct phylink_link_state *state) |
|
{ |
|
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
/* No need to check that this operation is valid, the callback would |
|
* not be called if it was not. |
|
*/ |
|
ds->ops->phylink_fixed_state(ds, dp->index, state); |
|
} |
|
|
|
/* slave device setup *******************************************************/ |
|
static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, |
|
u32 flags) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(slave_dev); |
|
struct dsa_switch *ds = dp->ds; |
|
|
|
slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); |
|
if (!slave_dev->phydev) { |
|
netdev_err(slave_dev, "no phy at %d\n", addr); |
|
return -ENODEV; |
|
} |
|
|
|
slave_dev->phydev->dev_flags |= flags; |
|
|
|
return phylink_connect_phy(dp->pl, slave_dev->phydev); |
|
} |
|
|
|
static int dsa_slave_phy_setup(struct net_device *slave_dev) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(slave_dev); |
|
struct device_node *port_dn = dp->dn; |
|
struct dsa_switch *ds = dp->ds; |
|
phy_interface_t mode; |
|
u32 phy_flags = 0; |
|
int ret; |
|
|
|
ret = of_get_phy_mode(port_dn, &mode); |
|
if (ret) |
|
mode = PHY_INTERFACE_MODE_NA; |
|
|
|
dp->pl_config.dev = &slave_dev->dev; |
|
dp->pl_config.type = PHYLINK_NETDEV; |
|
|
|
/* The get_fixed_state callback takes precedence over polling the |
|
* link GPIO in PHYLINK (see phylink_get_fixed_state). Only set |
|
* this if the switch provides such a callback. |
|
*/ |
|
if (ds->ops->phylink_fixed_state) { |
|
dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; |
|
dp->pl_config.poll_fixed_state = true; |
|
} |
|
|
|
dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, |
|
&dsa_port_phylink_mac_ops); |
|
if (IS_ERR(dp->pl)) { |
|
netdev_err(slave_dev, |
|
"error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); |
|
return PTR_ERR(dp->pl); |
|
} |
|
|
|
if (ds->ops->get_phy_flags) |
|
phy_flags = ds->ops->get_phy_flags(ds, dp->index); |
|
|
|
ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); |
|
if (ret == -ENODEV && ds->slave_mii_bus) { |
|
/* We could not connect to a designated PHY or SFP, so try to |
|
* use the switch internal MDIO bus instead |
|
*/ |
|
ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); |
|
if (ret) { |
|
netdev_err(slave_dev, |
|
"failed to connect to port %d: %d\n", |
|
dp->index, ret); |
|
phylink_destroy(dp->pl); |
|
return ret; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void dsa_slave_setup_tagger(struct net_device *slave) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(slave); |
|
struct dsa_slave_priv *p = netdev_priv(slave); |
|
const struct dsa_port *cpu_dp = dp->cpu_dp; |
|
struct net_device *master = cpu_dp->master; |
|
const struct dsa_switch *ds = dp->ds; |
|
|
|
slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; |
|
slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; |
|
/* Try to save one extra realloc later in the TX path (in the master) |
|
* by also inheriting the master's needed headroom and tailroom. |
|
* The 8021q driver also does this. |
|
*/ |
|
slave->needed_headroom += master->needed_headroom; |
|
slave->needed_tailroom += master->needed_tailroom; |
|
|
|
p->xmit = cpu_dp->tag_ops->xmit; |
|
|
|
slave->features = master->vlan_features | NETIF_F_HW_TC; |
|
if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) |
|
slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
|
slave->hw_features |= NETIF_F_HW_TC; |
|
slave->features |= NETIF_F_LLTX; |
|
if (slave->needed_tailroom) |
|
slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); |
|
} |
|
|
|
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_port *dp = dsa_slave_to_port(slave_dev); |
|
|
|
if (!netif_running(slave_dev)) |
|
return 0; |
|
|
|
netif_device_detach(slave_dev); |
|
|
|
rtnl_lock(); |
|
phylink_stop(dp->pl); |
|
rtnl_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
int dsa_slave_resume(struct net_device *slave_dev) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(slave_dev); |
|
|
|
if (!netif_running(slave_dev)) |
|
return 0; |
|
|
|
netif_device_attach(slave_dev); |
|
|
|
rtnl_lock(); |
|
phylink_start(dp->pl); |
|
rtnl_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
int dsa_slave_create(struct dsa_port *port) |
|
{ |
|
const struct dsa_port *cpu_dp = port->cpu_dp; |
|
struct net_device *master = cpu_dp->master; |
|
struct dsa_switch *ds = port->ds; |
|
const char *name = port->name; |
|
struct net_device *slave_dev; |
|
struct dsa_slave_priv *p; |
|
int ret; |
|
|
|
if (!ds->num_tx_queues) |
|
ds->num_tx_queues = 1; |
|
|
|
slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, |
|
NET_NAME_UNKNOWN, ether_setup, |
|
ds->num_tx_queues, 1); |
|
if (slave_dev == NULL) |
|
return -ENOMEM; |
|
|
|
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; |
|
if (!is_zero_ether_addr(port->mac)) |
|
ether_addr_copy(slave_dev->dev_addr, port->mac); |
|
else |
|
eth_hw_addr_inherit(slave_dev, master); |
|
slave_dev->priv_flags |= IFF_NO_QUEUE; |
|
slave_dev->netdev_ops = &dsa_slave_netdev_ops; |
|
if (ds->ops->port_max_mtu) |
|
slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); |
|
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, port->ds->dev); |
|
slave_dev->dev.of_node = port->dn; |
|
slave_dev->vlan_features = master->vlan_features; |
|
|
|
p = netdev_priv(slave_dev); |
|
slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
|
if (!slave_dev->tstats) { |
|
free_netdev(slave_dev); |
|
return -ENOMEM; |
|
} |
|
|
|
ret = gro_cells_init(&p->gcells, slave_dev); |
|
if (ret) |
|
goto out_free; |
|
|
|
p->dp = port; |
|
INIT_LIST_HEAD(&p->mall_tc_list); |
|
port->slave = slave_dev; |
|
dsa_slave_setup_tagger(slave_dev); |
|
|
|
rtnl_lock(); |
|
ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); |
|
rtnl_unlock(); |
|
if (ret && ret != -EOPNOTSUPP) |
|
dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", |
|
ret, ETH_DATA_LEN, port->index); |
|
|
|
netif_carrier_off(slave_dev); |
|
|
|
ret = dsa_slave_phy_setup(slave_dev); |
|
if (ret) { |
|
netdev_err(slave_dev, |
|
"error %d setting up PHY for tree %d, switch %d, port %d\n", |
|
ret, ds->dst->index, ds->index, port->index); |
|
goto out_gcells; |
|
} |
|
|
|
rtnl_lock(); |
|
|
|
ret = register_netdevice(slave_dev); |
|
if (ret) { |
|
netdev_err(master, "error %d registering interface %s\n", |
|
ret, slave_dev->name); |
|
rtnl_unlock(); |
|
goto out_phy; |
|
} |
|
|
|
ret = netdev_upper_dev_link(master, slave_dev, NULL); |
|
|
|
rtnl_unlock(); |
|
|
|
if (ret) |
|
goto out_unregister; |
|
|
|
return 0; |
|
|
|
out_unregister: |
|
unregister_netdev(slave_dev); |
|
out_phy: |
|
rtnl_lock(); |
|
phylink_disconnect_phy(p->dp->pl); |
|
rtnl_unlock(); |
|
phylink_destroy(p->dp->pl); |
|
out_gcells: |
|
gro_cells_destroy(&p->gcells); |
|
out_free: |
|
free_percpu(slave_dev->tstats); |
|
free_netdev(slave_dev); |
|
port->slave = NULL; |
|
return ret; |
|
} |
|
|
|
void dsa_slave_destroy(struct net_device *slave_dev) |
|
{ |
|
struct net_device *master = dsa_slave_to_master(slave_dev); |
|
struct dsa_port *dp = dsa_slave_to_port(slave_dev); |
|
struct dsa_slave_priv *p = netdev_priv(slave_dev); |
|
|
|
netif_carrier_off(slave_dev); |
|
rtnl_lock(); |
|
netdev_upper_dev_unlink(master, slave_dev); |
|
unregister_netdevice(slave_dev); |
|
phylink_disconnect_phy(dp->pl); |
|
rtnl_unlock(); |
|
|
|
phylink_destroy(dp->pl); |
|
gro_cells_destroy(&p->gcells); |
|
free_percpu(slave_dev->tstats); |
|
free_netdev(slave_dev); |
|
} |
|
|
|
bool dsa_slave_dev_check(const struct net_device *dev) |
|
{ |
|
return dev->netdev_ops == &dsa_slave_netdev_ops; |
|
} |
|
EXPORT_SYMBOL_GPL(dsa_slave_dev_check); |
|
|
|
static int dsa_slave_changeupper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct netlink_ext_ack *extack; |
|
int err = NOTIFY_DONE; |
|
|
|
extack = netdev_notifier_info_to_extack(&info->info); |
|
|
|
if (netif_is_bridge_master(info->upper_dev)) { |
|
if (info->linking) { |
|
err = dsa_port_bridge_join(dp, info->upper_dev, extack); |
|
if (!err) |
|
dsa_bridge_mtu_normalization(dp); |
|
err = notifier_from_errno(err); |
|
} else { |
|
dsa_port_bridge_leave(dp, info->upper_dev); |
|
err = NOTIFY_OK; |
|
} |
|
} else if (netif_is_lag_master(info->upper_dev)) { |
|
if (info->linking) { |
|
err = dsa_port_lag_join(dp, info->upper_dev, |
|
info->upper_info, extack); |
|
if (err == -EOPNOTSUPP) { |
|
NL_SET_ERR_MSG_MOD(info->info.extack, |
|
"Offloading not supported"); |
|
err = 0; |
|
} |
|
err = notifier_from_errno(err); |
|
} else { |
|
dsa_port_lag_leave(dp, info->upper_dev); |
|
err = NOTIFY_OK; |
|
} |
|
} else if (is_hsr_master(info->upper_dev)) { |
|
if (info->linking) { |
|
err = dsa_port_hsr_join(dp, info->upper_dev); |
|
if (err == -EOPNOTSUPP) { |
|
NL_SET_ERR_MSG_MOD(info->info.extack, |
|
"Offloading not supported"); |
|
err = 0; |
|
} |
|
err = notifier_from_errno(err); |
|
} else { |
|
dsa_port_hsr_leave(dp, info->upper_dev); |
|
err = NOTIFY_OK; |
|
} |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int dsa_slave_prechangeupper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct netlink_ext_ack *extack; |
|
int err = 0; |
|
|
|
extack = netdev_notifier_info_to_extack(&info->info); |
|
|
|
if (netif_is_bridge_master(info->upper_dev) && !info->linking) |
|
err = dsa_port_pre_bridge_leave(dp, info->upper_dev, extack); |
|
else if (netif_is_lag_master(info->upper_dev) && !info->linking) |
|
err = dsa_port_pre_lag_leave(dp, info->upper_dev, extack); |
|
/* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be |
|
* meaningfully enslaved to a bridge yet |
|
*/ |
|
|
|
return notifier_from_errno(err); |
|
} |
|
|
|
static int |
|
dsa_slave_lag_changeupper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct net_device *lower; |
|
struct list_head *iter; |
|
int err = NOTIFY_DONE; |
|
struct dsa_port *dp; |
|
|
|
netdev_for_each_lower_dev(dev, lower, iter) { |
|
if (!dsa_slave_dev_check(lower)) |
|
continue; |
|
|
|
dp = dsa_slave_to_port(lower); |
|
if (!dp->lag_dev) |
|
/* Software LAG */ |
|
continue; |
|
|
|
err = dsa_slave_changeupper(lower, info); |
|
if (notifier_to_errno(err)) |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
/* Same as dsa_slave_lag_changeupper() except that it calls |
|
* dsa_slave_prechangeupper() |
|
*/ |
|
static int |
|
dsa_slave_lag_prechangeupper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct net_device *lower; |
|
struct list_head *iter; |
|
int err = NOTIFY_DONE; |
|
struct dsa_port *dp; |
|
|
|
netdev_for_each_lower_dev(dev, lower, iter) { |
|
if (!dsa_slave_dev_check(lower)) |
|
continue; |
|
|
|
dp = dsa_slave_to_port(lower); |
|
if (!dp->lag_dev) |
|
/* Software LAG */ |
|
continue; |
|
|
|
err = dsa_slave_prechangeupper(lower, info); |
|
if (notifier_to_errno(err)) |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int |
|
dsa_prevent_bridging_8021q_upper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct netlink_ext_ack *ext_ack; |
|
struct net_device *slave; |
|
struct dsa_port *dp; |
|
|
|
ext_ack = netdev_notifier_info_to_extack(&info->info); |
|
|
|
if (!is_vlan_dev(dev)) |
|
return NOTIFY_DONE; |
|
|
|
slave = vlan_dev_real_dev(dev); |
|
if (!dsa_slave_dev_check(slave)) |
|
return NOTIFY_DONE; |
|
|
|
dp = dsa_slave_to_port(slave); |
|
if (!dp->bridge_dev) |
|
return NOTIFY_DONE; |
|
|
|
/* Deny enslaving a VLAN device into a VLAN-aware bridge */ |
|
if (br_vlan_enabled(dp->bridge_dev) && |
|
netif_is_bridge_master(info->upper_dev) && info->linking) { |
|
NL_SET_ERR_MSG_MOD(ext_ack, |
|
"Cannot enslave VLAN device into VLAN aware bridge"); |
|
return notifier_from_errno(-EINVAL); |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static int |
|
dsa_slave_check_8021q_upper(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct dsa_port *dp = dsa_slave_to_port(dev); |
|
struct net_device *br = dp->bridge_dev; |
|
struct bridge_vlan_info br_info; |
|
struct netlink_ext_ack *extack; |
|
int err = NOTIFY_DONE; |
|
u16 vid; |
|
|
|
if (!br || !br_vlan_enabled(br)) |
|
return NOTIFY_DONE; |
|
|
|
extack = netdev_notifier_info_to_extack(&info->info); |
|
vid = vlan_dev_vlan_id(info->upper_dev); |
|
|
|
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the |
|
* device, respectively the VID is not found, returning |
|
* 0 means success, which is a failure for us here. |
|
*/ |
|
err = br_vlan_get_info(br, vid, &br_info); |
|
if (err == 0) { |
|
NL_SET_ERR_MSG_MOD(extack, |
|
"This VLAN is already configured by the bridge"); |
|
return notifier_from_errno(-EBUSY); |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static int |
|
dsa_slave_prechangeupper_sanity_check(struct net_device *dev, |
|
struct netdev_notifier_changeupper_info *info) |
|
{ |
|
struct dsa_switch *ds; |
|
struct dsa_port *dp; |
|
int err; |
|
|
|
if (!dsa_slave_dev_check(dev)) |
|
return dsa_prevent_bridging_8021q_upper(dev, info); |
|
|
|
dp = dsa_slave_to_port(dev); |
|
ds = dp->ds; |
|
|
|
if (ds->ops->port_prechangeupper) { |
|
err = ds->ops->port_prechangeupper(ds, dp->index, info); |
|
if (err) |
|
return notifier_from_errno(err); |
|
} |
|
|
|
if (is_vlan_dev(info->upper_dev)) |
|
return dsa_slave_check_8021q_upper(dev, info); |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
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); |
|
|
|
switch (event) { |
|
case NETDEV_PRECHANGEUPPER: { |
|
struct netdev_notifier_changeupper_info *info = ptr; |
|
int err; |
|
|
|
err = dsa_slave_prechangeupper_sanity_check(dev, info); |
|
if (err != NOTIFY_DONE) |
|
return err; |
|
|
|
if (dsa_slave_dev_check(dev)) |
|
return dsa_slave_prechangeupper(dev, ptr); |
|
|
|
if (netif_is_lag_master(dev)) |
|
return dsa_slave_lag_prechangeupper(dev, ptr); |
|
|
|
break; |
|
} |
|
case NETDEV_CHANGEUPPER: |
|
if (dsa_slave_dev_check(dev)) |
|
return dsa_slave_changeupper(dev, ptr); |
|
|
|
if (netif_is_lag_master(dev)) |
|
return dsa_slave_lag_changeupper(dev, ptr); |
|
|
|
break; |
|
case NETDEV_CHANGELOWERSTATE: { |
|
struct netdev_notifier_changelowerstate_info *info = ptr; |
|
struct dsa_port *dp; |
|
int err; |
|
|
|
if (!dsa_slave_dev_check(dev)) |
|
break; |
|
|
|
dp = dsa_slave_to_port(dev); |
|
|
|
err = dsa_port_lag_change(dp, info->lower_state_info); |
|
return notifier_from_errno(err); |
|
} |
|
case NETDEV_GOING_DOWN: { |
|
struct dsa_port *dp, *cpu_dp; |
|
struct dsa_switch_tree *dst; |
|
LIST_HEAD(close_list); |
|
|
|
if (!netdev_uses_dsa(dev)) |
|
return NOTIFY_DONE; |
|
|
|
cpu_dp = dev->dsa_ptr; |
|
dst = cpu_dp->ds->dst; |
|
|
|
list_for_each_entry(dp, &dst->ports, list) { |
|
if (!dsa_is_user_port(dp->ds, dp->index)) |
|
continue; |
|
|
|
list_add(&dp->slave->close_list, &close_list); |
|
} |
|
|
|
dev_close_many(&close_list, true); |
|
|
|
return NOTIFY_OK; |
|
} |
|
default: |
|
break; |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static void |
|
dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) |
|
{ |
|
struct switchdev_notifier_fdb_info info = {}; |
|
struct dsa_switch *ds = switchdev_work->ds; |
|
struct dsa_port *dp; |
|
|
|
if (!dsa_is_user_port(ds, switchdev_work->port)) |
|
return; |
|
|
|
info.addr = switchdev_work->addr; |
|
info.vid = switchdev_work->vid; |
|
info.offloaded = true; |
|
dp = dsa_to_port(ds, switchdev_work->port); |
|
call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, |
|
dp->slave, &info.info, NULL); |
|
} |
|
|
|
static void dsa_slave_switchdev_event_work(struct work_struct *work) |
|
{ |
|
struct dsa_switchdev_event_work *switchdev_work = |
|
container_of(work, struct dsa_switchdev_event_work, work); |
|
struct dsa_switch *ds = switchdev_work->ds; |
|
struct dsa_port *dp; |
|
int err; |
|
|
|
dp = dsa_to_port(ds, switchdev_work->port); |
|
|
|
rtnl_lock(); |
|
switch (switchdev_work->event) { |
|
case SWITCHDEV_FDB_ADD_TO_DEVICE: |
|
if (switchdev_work->host_addr) |
|
err = dsa_port_host_fdb_add(dp, switchdev_work->addr, |
|
switchdev_work->vid); |
|
else |
|
err = dsa_port_fdb_add(dp, switchdev_work->addr, |
|
switchdev_work->vid); |
|
if (err) { |
|
dev_err(ds->dev, |
|
"port %d failed to add %pM vid %d to fdb: %d\n", |
|
dp->index, switchdev_work->addr, |
|
switchdev_work->vid, err); |
|
break; |
|
} |
|
dsa_fdb_offload_notify(switchdev_work); |
|
break; |
|
|
|
case SWITCHDEV_FDB_DEL_TO_DEVICE: |
|
if (switchdev_work->host_addr) |
|
err = dsa_port_host_fdb_del(dp, switchdev_work->addr, |
|
switchdev_work->vid); |
|
else |
|
err = dsa_port_fdb_del(dp, switchdev_work->addr, |
|
switchdev_work->vid); |
|
if (err) { |
|
dev_err(ds->dev, |
|
"port %d failed to delete %pM vid %d from fdb: %d\n", |
|
dp->index, switchdev_work->addr, |
|
switchdev_work->vid, err); |
|
} |
|
|
|
break; |
|
} |
|
rtnl_unlock(); |
|
|
|
dev_put(switchdev_work->dev); |
|
kfree(switchdev_work); |
|
} |
|
|
|
static int dsa_lower_dev_walk(struct net_device *lower_dev, |
|
struct netdev_nested_priv *priv) |
|
{ |
|
if (dsa_slave_dev_check(lower_dev)) { |
|
priv->data = (void *)netdev_priv(lower_dev); |
|
return 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev) |
|
{ |
|
struct netdev_nested_priv priv = { |
|
.data = NULL, |
|
}; |
|
|
|
netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv); |
|
|
|
return (struct dsa_slave_priv *)priv.data; |
|
} |
|
|
|
/* Called under rcu_read_lock() */ |
|
static int dsa_slave_switchdev_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = switchdev_notifier_info_to_dev(ptr); |
|
const struct switchdev_notifier_fdb_info *fdb_info; |
|
struct dsa_switchdev_event_work *switchdev_work; |
|
bool host_addr = false; |
|
struct dsa_port *dp; |
|
int err; |
|
|
|
switch (event) { |
|
case SWITCHDEV_PORT_ATTR_SET: |
|
err = switchdev_handle_port_attr_set(dev, ptr, |
|
dsa_slave_dev_check, |
|
dsa_slave_port_attr_set); |
|
return notifier_from_errno(err); |
|
case SWITCHDEV_FDB_ADD_TO_DEVICE: |
|
case SWITCHDEV_FDB_DEL_TO_DEVICE: |
|
fdb_info = ptr; |
|
|
|
if (dsa_slave_dev_check(dev)) { |
|
dp = dsa_slave_to_port(dev); |
|
|
|
if (fdb_info->is_local) |
|
host_addr = true; |
|
else if (!fdb_info->added_by_user) |
|
return NOTIFY_OK; |
|
} else { |
|
/* Snoop addresses added to foreign interfaces |
|
* bridged with us, or the bridge |
|
* itself. Dynamically learned addresses can |
|
* also be added for switches that don't |
|
* automatically learn SA from CPU-injected |
|
* traffic. |
|
*/ |
|
struct net_device *br_dev; |
|
struct dsa_slave_priv *p; |
|
|
|
if (netif_is_bridge_master(dev)) |
|
br_dev = dev; |
|
else |
|
br_dev = netdev_master_upper_dev_get_rcu(dev); |
|
|
|
if (!br_dev) |
|
return NOTIFY_DONE; |
|
|
|
if (!netif_is_bridge_master(br_dev)) |
|
return NOTIFY_DONE; |
|
|
|
p = dsa_slave_dev_lower_find(br_dev); |
|
if (!p) |
|
return NOTIFY_DONE; |
|
|
|
dp = p->dp; |
|
host_addr = fdb_info->is_local; |
|
|
|
/* FDB entries learned by the software bridge should |
|
* be installed as host addresses only if the driver |
|
* requests assisted learning. |
|
* On the other hand, FDB entries for local termination |
|
* should always be installed. |
|
*/ |
|
if (!fdb_info->added_by_user && !fdb_info->is_local && |
|
!dp->ds->assisted_learning_on_cpu_port) |
|
return NOTIFY_DONE; |
|
|
|
/* When the bridge learns an address on an offloaded |
|
* LAG we don't want to send traffic to the CPU, the |
|
* other ports bridged with the LAG should be able to |
|
* autonomously forward towards it. |
|
* On the other hand, if the address is local |
|
* (therefore not learned) then we want to trap it to |
|
* the CPU regardless of whether the interface it |
|
* belongs to is offloaded or not. |
|
*/ |
|
if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev) && |
|
!fdb_info->is_local) |
|
return NOTIFY_DONE; |
|
} |
|
|
|
if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del) |
|
return NOTIFY_DONE; |
|
|
|
switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); |
|
if (!switchdev_work) |
|
return NOTIFY_BAD; |
|
|
|
INIT_WORK(&switchdev_work->work, |
|
dsa_slave_switchdev_event_work); |
|
switchdev_work->ds = dp->ds; |
|
switchdev_work->port = dp->index; |
|
switchdev_work->event = event; |
|
switchdev_work->dev = dev; |
|
|
|
ether_addr_copy(switchdev_work->addr, |
|
fdb_info->addr); |
|
switchdev_work->vid = fdb_info->vid; |
|
switchdev_work->host_addr = host_addr; |
|
|
|
/* Hold a reference for dsa_fdb_offload_notify */ |
|
dev_hold(dev); |
|
dsa_schedule_work(&switchdev_work->work); |
|
break; |
|
default: |
|
return NOTIFY_DONE; |
|
} |
|
|
|
return NOTIFY_OK; |
|
} |
|
|
|
static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct net_device *dev = switchdev_notifier_info_to_dev(ptr); |
|
int err; |
|
|
|
switch (event) { |
|
case SWITCHDEV_PORT_OBJ_ADD: |
|
err = switchdev_handle_port_obj_add(dev, ptr, |
|
dsa_slave_dev_check, |
|
dsa_slave_port_obj_add); |
|
return notifier_from_errno(err); |
|
case SWITCHDEV_PORT_OBJ_DEL: |
|
err = switchdev_handle_port_obj_del(dev, ptr, |
|
dsa_slave_dev_check, |
|
dsa_slave_port_obj_del); |
|
return notifier_from_errno(err); |
|
case SWITCHDEV_PORT_ATTR_SET: |
|
err = switchdev_handle_port_attr_set(dev, ptr, |
|
dsa_slave_dev_check, |
|
dsa_slave_port_attr_set); |
|
return notifier_from_errno(err); |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct notifier_block dsa_slave_nb __read_mostly = { |
|
.notifier_call = dsa_slave_netdevice_event, |
|
}; |
|
|
|
struct notifier_block dsa_slave_switchdev_notifier = { |
|
.notifier_call = dsa_slave_switchdev_event, |
|
}; |
|
|
|
struct notifier_block dsa_slave_switchdev_blocking_notifier = { |
|
.notifier_call = dsa_slave_switchdev_blocking_event, |
|
}; |
|
|
|
int dsa_slave_register_notifier(void) |
|
{ |
|
struct notifier_block *nb; |
|
int err; |
|
|
|
err = register_netdevice_notifier(&dsa_slave_nb); |
|
if (err) |
|
return err; |
|
|
|
err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); |
|
if (err) |
|
goto err_switchdev_nb; |
|
|
|
nb = &dsa_slave_switchdev_blocking_notifier; |
|
err = register_switchdev_blocking_notifier(nb); |
|
if (err) |
|
goto err_switchdev_blocking_nb; |
|
|
|
return 0; |
|
|
|
err_switchdev_blocking_nb: |
|
unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); |
|
err_switchdev_nb: |
|
unregister_netdevice_notifier(&dsa_slave_nb); |
|
return err; |
|
} |
|
|
|
void dsa_slave_unregister_notifier(void) |
|
{ |
|
struct notifier_block *nb; |
|
int err; |
|
|
|
nb = &dsa_slave_switchdev_blocking_notifier; |
|
err = unregister_switchdev_blocking_notifier(nb); |
|
if (err) |
|
pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); |
|
|
|
err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); |
|
if (err) |
|
pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); |
|
|
|
err = unregister_netdevice_notifier(&dsa_slave_nb); |
|
if (err) |
|
pr_err("DSA: failed to unregister slave notifier (%d)\n", err); |
|
}
|
|
|