d7a947d289
On lan966x it is not allowed to have foreign interfaces under a bridge
which already contains lan966x ports. So when a port leaves the bridge
it would call switchdev_bridge_port_unoffload which eventually will
notify the other ports that bridge left the vlan group but that is not
true because the bridge is still part of the vlan group.
Therefore when a port leaves the bridge, stop generating replays because
already the HW cleared after itself and the other ports don't need to do
anything else.
Fixes: cf2f60897e ("net: lan966x: Add support to offload the forwarding.")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
594 lines
15 KiB
C
594 lines
15 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 struct notifier_block lan966x_switchdev_nb __read_mostly;
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static struct notifier_block lan966x_switchdev_blocking_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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static 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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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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static 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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static 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 *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(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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static int lan966x_port_changeupper(struct net_device *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, 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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return err;
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}
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static int lan966x_port_prechangeupper(struct net_device *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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if (netif_is_bridge_master(info->upper_dev) && !info->linking)
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switchdev_bridge_port_unoffload(port->dev, port,
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NULL, NULL);
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return NOTIFY_DONE;
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}
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static int lan966x_foreign_bridging_check(struct net_device *bridge,
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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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bool has_foreign = false;
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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(bridge))
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return 0;
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netdev_for_each_lower_dev(bridge, 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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/* Bridge 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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* bridge
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*/
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lan966x = port->lan966x;
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}
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} else {
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has_foreign = true;
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}
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if (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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return lan966x_foreign_bridging_check(info->upper_dev,
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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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if (event == NETDEV_CHANGEUPPER)
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return lan966x_bridge_check(dev, ptr);
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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, 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, 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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/* We don't offload uppers such as LAG as bridge ports, so every device except
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* the bridge itself is foreign.
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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);
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struct lan966x *lan966x = port->lan966x;
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if (netif_is_bridge_master(foreign_dev))
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if (lan966x->bridge == foreign_dev)
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return false;
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return true;
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}
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static int lan966x_switchdev_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 = switchdev_notifier_info_to_dev(ptr);
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int err;
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switch (event) {
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case SWITCHDEV_PORT_ATTR_SET:
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err = switchdev_handle_port_attr_set(dev, ptr,
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lan966x_netdevice_check,
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lan966x_port_attr_set);
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return notifier_from_errno(err);
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case SWITCHDEV_FDB_ADD_TO_DEVICE:
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case SWITCHDEV_FDB_DEL_TO_DEVICE:
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err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
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lan966x_netdevice_check,
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lan966x_foreign_dev_check,
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lan966x_handle_fdb);
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return notifier_from_errno(err);
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}
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return NOTIFY_DONE;
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}
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static int lan966x_handle_port_vlan_add(struct lan966x_port *port,
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const struct switchdev_obj *obj)
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{
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const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj);
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struct lan966x *lan966x = port->lan966x;
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if (!netif_is_bridge_master(obj->orig_dev))
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lan966x_vlan_port_add_vlan(port, v->vid,
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v->flags & BRIDGE_VLAN_INFO_PVID,
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v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
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|
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,
|
|
};
|
|
|
|
static struct notifier_block lan966x_switchdev_nb __read_mostly = {
|
|
.notifier_call = lan966x_switchdev_event,
|
|
};
|
|
|
|
static 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);
|
|
}
|