665 lines
16 KiB
C
665 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/if_bridge.h>
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#include <net/switchdev.h>
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#include "lan966x_main.h"
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static struct notifier_block lan966x_netdevice_nb __read_mostly;
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static void lan966x_port_set_mcast_ip_flood(struct lan966x_port *port,
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u32 pgid_ip)
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{
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struct lan966x *lan966x = port->lan966x;
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u32 flood_mask_ip;
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flood_mask_ip = lan_rd(lan966x, ANA_PGID(pgid_ip));
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flood_mask_ip = ANA_PGID_PGID_GET(flood_mask_ip);
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/* If mcast snooping is not enabled then use mcast flood mask
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* to decide to enable multicast flooding or not.
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*/
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if (!port->mcast_ena) {
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u32 flood_mask;
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flood_mask = lan_rd(lan966x, ANA_PGID(PGID_MC));
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flood_mask = ANA_PGID_PGID_GET(flood_mask);
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if (flood_mask & BIT(port->chip_port))
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flood_mask_ip |= BIT(port->chip_port);
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else
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flood_mask_ip &= ~BIT(port->chip_port);
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} else {
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flood_mask_ip &= ~BIT(port->chip_port);
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}
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lan_rmw(ANA_PGID_PGID_SET(flood_mask_ip),
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ANA_PGID_PGID,
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lan966x, ANA_PGID(pgid_ip));
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}
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static void lan966x_port_set_mcast_flood(struct lan966x_port *port,
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bool enabled)
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{
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u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_MC));
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val = ANA_PGID_PGID_GET(val);
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if (enabled)
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val |= BIT(port->chip_port);
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else
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val &= ~BIT(port->chip_port);
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lan_rmw(ANA_PGID_PGID_SET(val),
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ANA_PGID_PGID,
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port->lan966x, ANA_PGID(PGID_MC));
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if (!port->mcast_ena) {
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lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV4);
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lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV6);
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}
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}
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static void lan966x_port_set_ucast_flood(struct lan966x_port *port,
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bool enabled)
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{
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u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_UC));
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val = ANA_PGID_PGID_GET(val);
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if (enabled)
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val |= BIT(port->chip_port);
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else
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val &= ~BIT(port->chip_port);
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lan_rmw(ANA_PGID_PGID_SET(val),
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ANA_PGID_PGID,
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port->lan966x, ANA_PGID(PGID_UC));
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}
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static void lan966x_port_set_bcast_flood(struct lan966x_port *port,
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bool enabled)
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{
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u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_BC));
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val = ANA_PGID_PGID_GET(val);
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if (enabled)
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val |= BIT(port->chip_port);
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else
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val &= ~BIT(port->chip_port);
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lan_rmw(ANA_PGID_PGID_SET(val),
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ANA_PGID_PGID,
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port->lan966x, ANA_PGID(PGID_BC));
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}
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static void lan966x_port_set_learning(struct lan966x_port *port, bool enabled)
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{
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lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(enabled),
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ANA_PORT_CFG_LEARN_ENA,
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port->lan966x, ANA_PORT_CFG(port->chip_port));
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port->learn_ena = enabled;
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}
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static void lan966x_port_bridge_flags(struct lan966x_port *port,
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struct switchdev_brport_flags flags)
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{
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if (flags.mask & BR_MCAST_FLOOD)
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lan966x_port_set_mcast_flood(port,
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!!(flags.val & BR_MCAST_FLOOD));
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if (flags.mask & BR_FLOOD)
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lan966x_port_set_ucast_flood(port,
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!!(flags.val & BR_FLOOD));
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if (flags.mask & BR_BCAST_FLOOD)
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lan966x_port_set_bcast_flood(port,
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!!(flags.val & BR_BCAST_FLOOD));
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if (flags.mask & BR_LEARNING)
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lan966x_port_set_learning(port,
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!!(flags.val & BR_LEARNING));
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}
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static int lan966x_port_pre_bridge_flags(struct lan966x_port *port,
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struct switchdev_brport_flags flags)
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{
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if (flags.mask & ~(BR_MCAST_FLOOD | BR_FLOOD | BR_BCAST_FLOOD |
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BR_LEARNING))
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return -EINVAL;
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return 0;
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}
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void lan966x_update_fwd_mask(struct lan966x *lan966x)
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{
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int i;
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for (i = 0; i < lan966x->num_phys_ports; i++) {
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struct lan966x_port *port = lan966x->ports[i];
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unsigned long mask = 0;
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if (port && lan966x->bridge_fwd_mask & BIT(i)) {
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mask = lan966x->bridge_fwd_mask & ~BIT(i);
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if (port->bond)
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mask &= ~lan966x_lag_get_mask(lan966x,
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port->bond);
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}
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mask |= BIT(CPU_PORT);
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lan_wr(ANA_PGID_PGID_SET(mask),
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lan966x, ANA_PGID(PGID_SRC + i));
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}
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}
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void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state)
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{
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struct lan966x *lan966x = port->lan966x;
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bool learn_ena = false;
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if ((state == BR_STATE_FORWARDING || state == BR_STATE_LEARNING) &&
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port->learn_ena)
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learn_ena = true;
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if (state == BR_STATE_FORWARDING)
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lan966x->bridge_fwd_mask |= BIT(port->chip_port);
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else
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lan966x->bridge_fwd_mask &= ~BIT(port->chip_port);
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lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(learn_ena),
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ANA_PORT_CFG_LEARN_ENA,
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lan966x, ANA_PORT_CFG(port->chip_port));
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lan966x_update_fwd_mask(lan966x);
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}
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void lan966x_port_ageing_set(struct lan966x_port *port,
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unsigned long ageing_clock_t)
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{
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unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
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u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;
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lan966x_mac_set_ageing(port->lan966x, ageing_time);
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}
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static void lan966x_port_mc_set(struct lan966x_port *port, bool mcast_ena)
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{
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struct lan966x *lan966x = port->lan966x;
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port->mcast_ena = mcast_ena;
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if (mcast_ena)
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lan966x_mdb_restore_entries(lan966x);
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else
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lan966x_mdb_clear_entries(lan966x);
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lan_rmw(ANA_CPU_FWD_CFG_IGMP_REDIR_ENA_SET(mcast_ena) |
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ANA_CPU_FWD_CFG_MLD_REDIR_ENA_SET(mcast_ena) |
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ANA_CPU_FWD_CFG_IPMC_CTRL_COPY_ENA_SET(mcast_ena),
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ANA_CPU_FWD_CFG_IGMP_REDIR_ENA |
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ANA_CPU_FWD_CFG_MLD_REDIR_ENA |
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ANA_CPU_FWD_CFG_IPMC_CTRL_COPY_ENA,
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lan966x, ANA_CPU_FWD_CFG(port->chip_port));
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lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV4);
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lan966x_port_set_mcast_ip_flood(port, PGID_MCIPV6);
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}
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static int lan966x_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 lan966x_port *port = netdev_priv(dev);
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int err = 0;
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if (ctx && ctx != port)
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return 0;
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switch (attr->id) {
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case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
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lan966x_port_bridge_flags(port, attr->u.brport_flags);
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break;
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case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
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err = lan966x_port_pre_bridge_flags(port, attr->u.brport_flags);
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break;
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case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
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lan966x_port_stp_state_set(port, attr->u.stp_state);
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break;
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case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
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lan966x_port_ageing_set(port, attr->u.ageing_time);
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break;
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case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
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lan966x_vlan_port_set_vlan_aware(port, attr->u.vlan_filtering);
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lan966x_vlan_port_apply(port);
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break;
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case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
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lan966x_port_mc_set(port, !attr->u.mc_disabled);
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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 lan966x_port_bridge_join(struct lan966x_port *port,
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struct net_device *brport_dev,
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struct net_device *bridge,
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struct netlink_ext_ack *extack)
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{
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struct switchdev_brport_flags flags = {0};
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struct lan966x *lan966x = port->lan966x;
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struct net_device *dev = port->dev;
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int err;
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if (!lan966x->bridge_mask) {
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lan966x->bridge = bridge;
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} else {
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if (lan966x->bridge != bridge) {
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NL_SET_ERR_MSG_MOD(extack, "Not allow to add port to different bridge");
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return -ENODEV;
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}
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}
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err = switchdev_bridge_port_offload(brport_dev, dev, port,
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&lan966x_switchdev_nb,
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&lan966x_switchdev_blocking_nb,
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false, extack);
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if (err)
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return err;
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lan966x->bridge_mask |= BIT(port->chip_port);
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flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
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flags.val = flags.mask;
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lan966x_port_bridge_flags(port, flags);
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return 0;
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}
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static void lan966x_port_bridge_leave(struct lan966x_port *port,
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struct net_device *bridge)
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{
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struct switchdev_brport_flags flags = {0};
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struct lan966x *lan966x = port->lan966x;
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flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
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flags.val = flags.mask & ~BR_LEARNING;
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lan966x_port_bridge_flags(port, flags);
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lan966x->bridge_mask &= ~BIT(port->chip_port);
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if (!lan966x->bridge_mask)
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lan966x->bridge = NULL;
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/* Set the port back to host mode */
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lan966x_vlan_port_set_vlan_aware(port, false);
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lan966x_vlan_port_set_vid(port, HOST_PVID, false, false);
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lan966x_vlan_port_apply(port);
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}
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int lan966x_port_changeupper(struct net_device *dev,
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struct net_device *brport_dev,
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struct netdev_notifier_changeupper_info *info)
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{
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struct lan966x_port *port = netdev_priv(dev);
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struct netlink_ext_ack *extack;
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int err = 0;
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extack = netdev_notifier_info_to_extack(&info->info);
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if (netif_is_bridge_master(info->upper_dev)) {
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if (info->linking)
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err = lan966x_port_bridge_join(port, brport_dev,
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info->upper_dev,
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extack);
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else
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lan966x_port_bridge_leave(port, info->upper_dev);
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}
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if (netif_is_lag_master(info->upper_dev)) {
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if (info->linking)
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err = lan966x_lag_port_join(port, info->upper_dev,
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info->upper_dev,
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extack);
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else
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lan966x_lag_port_leave(port, info->upper_dev);
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}
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return err;
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}
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int lan966x_port_prechangeupper(struct net_device *dev,
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struct net_device *brport_dev,
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struct netdev_notifier_changeupper_info *info)
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{
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struct lan966x_port *port = netdev_priv(dev);
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int err = NOTIFY_DONE;
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if (netif_is_bridge_master(info->upper_dev) && !info->linking) {
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switchdev_bridge_port_unoffload(port->dev, port, NULL, NULL);
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lan966x_fdb_flush_workqueue(port->lan966x);
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}
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if (netif_is_lag_master(info->upper_dev)) {
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err = lan966x_lag_port_prechangeupper(dev, info);
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if (err || info->linking)
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return err;
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switchdev_bridge_port_unoffload(brport_dev, port, NULL, NULL);
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lan966x_fdb_flush_workqueue(port->lan966x);
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}
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return err;
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}
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static int lan966x_foreign_bridging_check(struct net_device *upper,
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bool *has_foreign,
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bool *seen_lan966x,
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struct netlink_ext_ack *extack)
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{
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struct lan966x *lan966x = NULL;
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struct net_device *dev;
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struct list_head *iter;
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if (!netif_is_bridge_master(upper) &&
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!netif_is_lag_master(upper))
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return 0;
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netdev_for_each_lower_dev(upper, dev, iter) {
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if (lan966x_netdevice_check(dev)) {
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struct lan966x_port *port = netdev_priv(dev);
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if (lan966x) {
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/* Upper already has at least one port of a
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* lan966x switch inside it, check that it's
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* the same instance of the driver.
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*/
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if (port->lan966x != lan966x) {
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NL_SET_ERR_MSG_MOD(extack,
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"Bridging between multiple lan966x switches disallowed");
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return -EINVAL;
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}
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} else {
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/* This is the first lan966x port inside this
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* upper device
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*/
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lan966x = port->lan966x;
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*seen_lan966x = true;
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}
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} else if (netif_is_lag_master(dev)) {
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/* Allow to have bond interfaces that have only lan966x
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* devices
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*/
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if (lan966x_foreign_bridging_check(dev, has_foreign,
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seen_lan966x,
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extack))
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return -EINVAL;
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} else {
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*has_foreign = true;
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}
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if (*seen_lan966x && *has_foreign) {
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NL_SET_ERR_MSG_MOD(extack,
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"Bridging lan966x ports with foreign interfaces disallowed");
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return -EINVAL;
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}
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}
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return 0;
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}
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static int lan966x_bridge_check(struct net_device *dev,
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struct netdev_notifier_changeupper_info *info)
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{
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bool has_foreign = false;
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bool seen_lan966x = false;
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return lan966x_foreign_bridging_check(info->upper_dev,
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&has_foreign,
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&seen_lan966x,
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info->info.extack);
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}
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static int lan966x_netdevice_port_event(struct net_device *dev,
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struct notifier_block *nb,
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unsigned long event, void *ptr)
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{
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int err = 0;
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if (!lan966x_netdevice_check(dev)) {
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switch (event) {
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case NETDEV_CHANGEUPPER:
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case NETDEV_PRECHANGEUPPER:
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err = lan966x_bridge_check(dev, ptr);
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if (err)
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return err;
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if (netif_is_lag_master(dev)) {
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if (event == NETDEV_CHANGEUPPER)
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err = lan966x_lag_netdev_changeupper(dev,
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ptr);
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else
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err = lan966x_lag_netdev_prechangeupper(dev,
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ptr);
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return err;
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}
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break;
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default:
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return 0;
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}
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return 0;
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}
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switch (event) {
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case NETDEV_PRECHANGEUPPER:
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err = lan966x_port_prechangeupper(dev, dev, ptr);
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break;
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case NETDEV_CHANGEUPPER:
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err = lan966x_bridge_check(dev, ptr);
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if (err)
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return err;
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err = lan966x_port_changeupper(dev, dev, ptr);
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break;
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case NETDEV_CHANGELOWERSTATE:
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err = lan966x_lag_port_changelowerstate(dev, ptr);
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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 lan966x_netdevice_event(struct notifier_block *nb,
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unsigned long event, void *ptr)
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{
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struct net_device *dev = netdev_notifier_info_to_dev(ptr);
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int ret;
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ret = lan966x_netdevice_port_event(dev, nb, event, ptr);
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return notifier_from_errno(ret);
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}
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static bool lan966x_foreign_dev_check(const struct net_device *dev,
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const struct net_device *foreign_dev)
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{
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struct lan966x_port *port = netdev_priv(dev);
|
|
struct lan966x *lan966x = port->lan966x;
|
|
int i;
|
|
|
|
if (netif_is_bridge_master(foreign_dev))
|
|
if (lan966x->bridge == foreign_dev)
|
|
return false;
|
|
|
|
if (netif_is_lag_master(foreign_dev))
|
|
for (i = 0; i < lan966x->num_phys_ports; ++i)
|
|
if (lan966x->ports[i] &&
|
|
lan966x->ports[i]->bond == foreign_dev)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int lan966x_switchdev_event(struct notifier_block *nb,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
|
|
int err;
|
|
|
|
switch (event) {
|
|
case SWITCHDEV_PORT_ATTR_SET:
|
|
err = switchdev_handle_port_attr_set(dev, ptr,
|
|
lan966x_netdevice_check,
|
|
lan966x_port_attr_set);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_FDB_ADD_TO_DEVICE:
|
|
case SWITCHDEV_FDB_DEL_TO_DEVICE:
|
|
err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
|
|
lan966x_netdevice_check,
|
|
lan966x_foreign_dev_check,
|
|
lan966x_handle_fdb);
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int lan966x_handle_port_vlan_add(struct lan966x_port *port,
|
|
const struct switchdev_obj *obj)
|
|
{
|
|
const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj);
|
|
struct lan966x *lan966x = port->lan966x;
|
|
|
|
if (!netif_is_bridge_master(obj->orig_dev))
|
|
lan966x_vlan_port_add_vlan(port, v->vid,
|
|
v->flags & BRIDGE_VLAN_INFO_PVID,
|
|
v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
|
|
else
|
|
lan966x_vlan_cpu_add_vlan(lan966x, v->vid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lan966x_handle_port_obj_add(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct lan966x_port *port = netdev_priv(dev);
|
|
int err;
|
|
|
|
if (ctx && ctx != port)
|
|
return 0;
|
|
|
|
switch (obj->id) {
|
|
case SWITCHDEV_OBJ_ID_PORT_VLAN:
|
|
err = lan966x_handle_port_vlan_add(port, obj);
|
|
break;
|
|
case SWITCHDEV_OBJ_ID_PORT_MDB:
|
|
case SWITCHDEV_OBJ_ID_HOST_MDB:
|
|
err = lan966x_handle_port_mdb_add(port, obj);
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lan966x_handle_port_vlan_del(struct lan966x_port *port,
|
|
const struct switchdev_obj *obj)
|
|
{
|
|
const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj);
|
|
struct lan966x *lan966x = port->lan966x;
|
|
|
|
if (!netif_is_bridge_master(obj->orig_dev))
|
|
lan966x_vlan_port_del_vlan(port, v->vid);
|
|
else
|
|
lan966x_vlan_cpu_del_vlan(lan966x, v->vid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lan966x_handle_port_obj_del(struct net_device *dev, const void *ctx,
|
|
const struct switchdev_obj *obj)
|
|
{
|
|
struct lan966x_port *port = netdev_priv(dev);
|
|
int err;
|
|
|
|
if (ctx && ctx != port)
|
|
return 0;
|
|
|
|
switch (obj->id) {
|
|
case SWITCHDEV_OBJ_ID_PORT_VLAN:
|
|
err = lan966x_handle_port_vlan_del(port, obj);
|
|
break;
|
|
case SWITCHDEV_OBJ_ID_PORT_MDB:
|
|
case SWITCHDEV_OBJ_ID_HOST_MDB:
|
|
err = lan966x_handle_port_mdb_del(port, obj);
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lan966x_switchdev_blocking_event(struct notifier_block *nb,
|
|
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,
|
|
lan966x_netdevice_check,
|
|
lan966x_handle_port_obj_add);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_OBJ_DEL:
|
|
err = switchdev_handle_port_obj_del(dev, ptr,
|
|
lan966x_netdevice_check,
|
|
lan966x_handle_port_obj_del);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_ATTR_SET:
|
|
err = switchdev_handle_port_attr_set(dev, ptr,
|
|
lan966x_netdevice_check,
|
|
lan966x_port_attr_set);
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block lan966x_netdevice_nb __read_mostly = {
|
|
.notifier_call = lan966x_netdevice_event,
|
|
};
|
|
|
|
struct notifier_block lan966x_switchdev_nb __read_mostly = {
|
|
.notifier_call = lan966x_switchdev_event,
|
|
};
|
|
|
|
struct notifier_block lan966x_switchdev_blocking_nb __read_mostly = {
|
|
.notifier_call = lan966x_switchdev_blocking_event,
|
|
};
|
|
|
|
void lan966x_register_notifier_blocks(void)
|
|
{
|
|
register_netdevice_notifier(&lan966x_netdevice_nb);
|
|
register_switchdev_notifier(&lan966x_switchdev_nb);
|
|
register_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb);
|
|
}
|
|
|
|
void lan966x_unregister_notifier_blocks(void)
|
|
{
|
|
unregister_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb);
|
|
unregister_switchdev_notifier(&lan966x_switchdev_nb);
|
|
unregister_netdevice_notifier(&lan966x_netdevice_nb);
|
|
}
|