652 lines
16 KiB
C
652 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* Microchip Sparx5 Switch driver
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*
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* Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
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*/
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#include <linux/if_bridge.h>
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#include <net/switchdev.h>
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#include "sparx5_main_regs.h"
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#include "sparx5_main.h"
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static struct workqueue_struct *sparx5_owq;
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struct sparx5_switchdev_event_work {
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struct work_struct work;
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struct switchdev_notifier_fdb_info fdb_info;
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struct net_device *dev;
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struct sparx5 *sparx5;
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unsigned long event;
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};
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static int sparx5_port_attr_pre_bridge_flags(struct sparx5_port *port,
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struct switchdev_brport_flags flags)
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{
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if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD))
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return -EINVAL;
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return 0;
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}
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static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
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struct switchdev_brport_flags flags)
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{
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int pgid;
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if (flags.mask & BR_MCAST_FLOOD)
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for (pgid = PGID_MC_FLOOD; pgid <= PGID_IPV6_MC_CTRL; pgid++)
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sparx5_pgid_update_mask(port, pgid, !!(flags.val & BR_MCAST_FLOOD));
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if (flags.mask & BR_FLOOD)
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sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
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if (flags.mask & BR_BCAST_FLOOD)
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sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
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}
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static void sparx5_attr_stp_state_set(struct sparx5_port *port,
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u8 state)
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{
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struct sparx5 *sparx5 = port->sparx5;
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if (!test_bit(port->portno, sparx5->bridge_mask)) {
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netdev_err(port->ndev,
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"Controlling non-bridged port %d?\n", port->portno);
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return;
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}
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switch (state) {
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case BR_STATE_FORWARDING:
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set_bit(port->portno, sparx5->bridge_fwd_mask);
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fallthrough;
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case BR_STATE_LEARNING:
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set_bit(port->portno, sparx5->bridge_lrn_mask);
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break;
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default:
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/* All other states treated as blocking */
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clear_bit(port->portno, sparx5->bridge_fwd_mask);
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clear_bit(port->portno, sparx5->bridge_lrn_mask);
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break;
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}
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/* apply the bridge_fwd_mask to all the ports */
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sparx5_update_fwd(sparx5);
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}
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static void sparx5_port_attr_ageing_set(struct sparx5_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);
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sparx5_set_ageing(port->sparx5, ageing_time);
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}
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static int sparx5_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 sparx5_port *port = netdev_priv(dev);
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switch (attr->id) {
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case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
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return sparx5_port_attr_pre_bridge_flags(port,
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attr->u.brport_flags);
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case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
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sparx5_port_attr_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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sparx5_attr_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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sparx5_port_attr_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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/* Used PVID 1 when default_pvid is 0, to avoid
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* collision with non-bridged ports.
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*/
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if (port->pvid == 0)
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port->pvid = 1;
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port->vlan_aware = attr->u.vlan_filtering;
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sparx5_vlan_port_apply(port->sparx5, port);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int sparx5_port_bridge_join(struct sparx5_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 sparx5 *sparx5 = port->sparx5;
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struct net_device *ndev = port->ndev;
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int err;
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if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
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/* First bridged port */
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sparx5->hw_bridge_dev = bridge;
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else
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if (sparx5->hw_bridge_dev != bridge)
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/* This is adding the port to a second bridge, this is
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* unsupported
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*/
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return -ENODEV;
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set_bit(port->portno, sparx5->bridge_mask);
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err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
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false, extack);
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if (err)
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goto err_switchdev_offload;
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/* Remove standalone port entry */
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sparx5_mact_forget(sparx5, ndev->dev_addr, 0);
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/* Port enters in bridge mode therefor don't need to copy to CPU
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* frames for multicast in case the bridge is not requesting them
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*/
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__dev_mc_unsync(ndev, sparx5_mc_unsync);
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return 0;
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err_switchdev_offload:
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clear_bit(port->portno, sparx5->bridge_mask);
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return err;
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}
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static void sparx5_port_bridge_leave(struct sparx5_port *port,
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struct net_device *bridge)
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{
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struct sparx5 *sparx5 = port->sparx5;
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switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);
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clear_bit(port->portno, sparx5->bridge_mask);
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if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
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sparx5->hw_bridge_dev = NULL;
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/* Clear bridge vlan settings before updating the port settings */
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port->vlan_aware = 0;
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port->pvid = NULL_VID;
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port->vid = NULL_VID;
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/* Forward frames to CPU */
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sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);
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/* Port enters in host more therefore restore mc list */
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__dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
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}
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static int sparx5_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 sparx5_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 = sparx5_port_bridge_join(port, info->upper_dev,
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extack);
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else
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sparx5_port_bridge_leave(port, info->upper_dev);
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sparx5_vlan_port_apply(port->sparx5, port);
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}
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return err;
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}
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static int sparx5_port_add_addr(struct net_device *dev, bool up)
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{
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struct sparx5_port *port = netdev_priv(dev);
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struct sparx5 *sparx5 = port->sparx5;
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u16 vid = port->pvid;
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if (up)
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sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
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else
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sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
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return 0;
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}
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static int sparx5_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 (!sparx5_netdevice_check(dev))
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return 0;
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switch (event) {
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case NETDEV_CHANGEUPPER:
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err = sparx5_port_changeupper(dev, ptr);
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break;
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case NETDEV_PRE_UP:
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err = sparx5_port_add_addr(dev, true);
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break;
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case NETDEV_DOWN:
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err = sparx5_port_add_addr(dev, false);
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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 sparx5_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 = 0;
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ret = sparx5_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 void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
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{
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struct sparx5_switchdev_event_work *switchdev_work =
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container_of(work, struct sparx5_switchdev_event_work, work);
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struct net_device *dev = switchdev_work->dev;
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struct switchdev_notifier_fdb_info *fdb_info;
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struct sparx5_port *port;
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struct sparx5 *sparx5;
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bool host_addr;
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u16 vid;
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rtnl_lock();
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if (!sparx5_netdevice_check(dev)) {
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host_addr = true;
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sparx5 = switchdev_work->sparx5;
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} else {
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host_addr = false;
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sparx5 = switchdev_work->sparx5;
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port = netdev_priv(dev);
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}
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fdb_info = &switchdev_work->fdb_info;
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/* Used PVID 1 when default_pvid is 0, to avoid
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* collision with non-bridged ports.
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*/
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if (fdb_info->vid == 0)
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vid = 1;
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else
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vid = fdb_info->vid;
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switch (switchdev_work->event) {
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case SWITCHDEV_FDB_ADD_TO_DEVICE:
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if (host_addr)
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sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
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fdb_info->addr, vid);
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else
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sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
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fdb_info->addr, vid);
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break;
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case SWITCHDEV_FDB_DEL_TO_DEVICE:
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sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
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break;
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}
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rtnl_unlock();
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kfree(switchdev_work->fdb_info.addr);
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kfree(switchdev_work);
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dev_put(dev);
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}
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static void sparx5_schedule_work(struct work_struct *work)
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{
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queue_work(sparx5_owq, work);
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}
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static int sparx5_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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struct sparx5_switchdev_event_work *switchdev_work;
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struct switchdev_notifier_fdb_info *fdb_info;
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struct switchdev_notifier_info *info = ptr;
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struct sparx5 *spx5;
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int err;
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spx5 = container_of(nb, struct sparx5, switchdev_nb);
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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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sparx5_netdevice_check,
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sparx5_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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fallthrough;
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case SWITCHDEV_FDB_DEL_TO_DEVICE:
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switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
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if (!switchdev_work)
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return NOTIFY_BAD;
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switchdev_work->dev = dev;
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switchdev_work->event = event;
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switchdev_work->sparx5 = spx5;
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fdb_info = container_of(info,
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struct switchdev_notifier_fdb_info,
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info);
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INIT_WORK(&switchdev_work->work,
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sparx5_switchdev_bridge_fdb_event_work);
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memcpy(&switchdev_work->fdb_info, ptr,
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sizeof(switchdev_work->fdb_info));
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switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
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if (!switchdev_work->fdb_info.addr)
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goto err_addr_alloc;
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ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
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fdb_info->addr);
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dev_hold(dev);
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sparx5_schedule_work(&switchdev_work->work);
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break;
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}
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return NOTIFY_DONE;
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err_addr_alloc:
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kfree(switchdev_work);
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return NOTIFY_BAD;
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}
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static int sparx5_handle_port_vlan_add(struct net_device *dev,
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struct notifier_block *nb,
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const struct switchdev_obj_port_vlan *v)
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{
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struct sparx5_port *port = netdev_priv(dev);
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if (netif_is_bridge_master(dev)) {
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struct sparx5 *sparx5 =
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container_of(nb, struct sparx5,
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switchdev_blocking_nb);
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/* Flood broadcast to CPU */
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sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
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v->vid);
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return 0;
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}
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if (!sparx5_netdevice_check(dev))
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return -EOPNOTSUPP;
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return sparx5_vlan_vid_add(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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}
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static int sparx5_handle_port_mdb_add(struct net_device *dev,
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struct notifier_block *nb,
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const struct switchdev_obj_port_mdb *v)
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{
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struct sparx5_port *port = netdev_priv(dev);
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struct sparx5 *spx5 = port->sparx5;
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u16 pgid_idx, vid;
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u32 mact_entry;
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int res, err;
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if (!sparx5_netdevice_check(dev))
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return -EOPNOTSUPP;
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if (netif_is_bridge_master(v->obj.orig_dev)) {
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sparx5_mact_learn(spx5, PGID_CPU, v->addr, v->vid);
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return 0;
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}
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/* When VLAN unaware the vlan value is not parsed and we receive vid 0.
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* Fall back to bridge vid 1.
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*/
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if (!br_vlan_enabled(spx5->hw_bridge_dev))
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vid = 1;
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else
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vid = v->vid;
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res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
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if (res == 0) {
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pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
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/* MC_IDX starts after the port masks in the PGID table */
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pgid_idx += SPX5_PORTS;
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sparx5_pgid_update_mask(port, pgid_idx, true);
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} else {
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err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
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if (err) {
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netdev_warn(dev, "multicast pgid table full\n");
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return err;
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}
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sparx5_pgid_update_mask(port, pgid_idx, true);
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err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
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if (err) {
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netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
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sparx5_pgid_update_mask(port, pgid_idx, false);
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return err;
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}
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}
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return 0;
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}
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static int sparx5_mdb_del_entry(struct net_device *dev,
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struct sparx5 *spx5,
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const unsigned char mac[ETH_ALEN],
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const u16 vid,
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u16 pgid_idx)
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{
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int err;
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err = sparx5_mact_forget(spx5, mac, vid);
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if (err) {
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netdev_warn(dev, "could not forget mac address %pM", mac);
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return err;
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}
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err = sparx5_pgid_free(spx5, pgid_idx);
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if (err) {
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netdev_err(dev, "attempted to free already freed pgid\n");
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return err;
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}
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return 0;
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}
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static int sparx5_handle_port_mdb_del(struct net_device *dev,
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struct notifier_block *nb,
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const struct switchdev_obj_port_mdb *v)
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{
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struct sparx5_port *port = netdev_priv(dev);
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struct sparx5 *spx5 = port->sparx5;
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u16 pgid_idx, vid;
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u32 mact_entry, res, pgid_entry[3];
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int err;
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if (!sparx5_netdevice_check(dev))
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return -EOPNOTSUPP;
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if (netif_is_bridge_master(v->obj.orig_dev)) {
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sparx5_mact_forget(spx5, v->addr, v->vid);
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return 0;
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}
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if (!br_vlan_enabled(spx5->hw_bridge_dev))
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vid = 1;
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else
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vid = v->vid;
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res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
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if (res == 0) {
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pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
|
|
|
|
/* MC_IDX starts after the port masks in the PGID table */
|
|
pgid_idx += SPX5_PORTS;
|
|
sparx5_pgid_update_mask(port, pgid_idx, false);
|
|
|
|
sparx5_pgid_read_mask(spx5, pgid_idx, pgid_entry);
|
|
if (bitmap_empty((unsigned long *)pgid_entry, SPX5_PORTS)) {
|
|
/* No ports are in MC group. Remove entry */
|
|
err = sparx5_mdb_del_entry(dev, spx5, v->addr, vid, pgid_idx);
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sparx5_handle_port_obj_add(struct net_device *dev,
|
|
struct notifier_block *nb,
|
|
struct switchdev_notifier_port_obj_info *info)
|
|
{
|
|
const struct switchdev_obj *obj = info->obj;
|
|
int err;
|
|
|
|
switch (obj->id) {
|
|
case SWITCHDEV_OBJ_ID_PORT_VLAN:
|
|
err = sparx5_handle_port_vlan_add(dev, nb,
|
|
SWITCHDEV_OBJ_PORT_VLAN(obj));
|
|
break;
|
|
case SWITCHDEV_OBJ_ID_PORT_MDB:
|
|
case SWITCHDEV_OBJ_ID_HOST_MDB:
|
|
err = sparx5_handle_port_mdb_add(dev, nb,
|
|
SWITCHDEV_OBJ_PORT_MDB(obj));
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
info->handled = true;
|
|
return err;
|
|
}
|
|
|
|
static int sparx5_handle_port_vlan_del(struct net_device *dev,
|
|
struct notifier_block *nb,
|
|
u16 vid)
|
|
{
|
|
struct sparx5_port *port = netdev_priv(dev);
|
|
int ret;
|
|
|
|
/* Master bridge? */
|
|
if (netif_is_bridge_master(dev)) {
|
|
struct sparx5 *sparx5 =
|
|
container_of(nb, struct sparx5,
|
|
switchdev_blocking_nb);
|
|
|
|
sparx5_mact_forget(sparx5, dev->broadcast, vid);
|
|
return 0;
|
|
}
|
|
|
|
if (!sparx5_netdevice_check(dev))
|
|
return -EOPNOTSUPP;
|
|
|
|
ret = sparx5_vlan_vid_del(port, vid);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sparx5_handle_port_obj_del(struct net_device *dev,
|
|
struct notifier_block *nb,
|
|
struct switchdev_notifier_port_obj_info *info)
|
|
{
|
|
const struct switchdev_obj *obj = info->obj;
|
|
int err;
|
|
|
|
switch (obj->id) {
|
|
case SWITCHDEV_OBJ_ID_PORT_VLAN:
|
|
err = sparx5_handle_port_vlan_del(dev, nb,
|
|
SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
|
|
break;
|
|
case SWITCHDEV_OBJ_ID_PORT_MDB:
|
|
case SWITCHDEV_OBJ_ID_HOST_MDB:
|
|
err = sparx5_handle_port_mdb_del(dev, nb,
|
|
SWITCHDEV_OBJ_PORT_MDB(obj));
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
info->handled = true;
|
|
return err;
|
|
}
|
|
|
|
static int sparx5_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 = sparx5_handle_port_obj_add(dev, nb, ptr);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_OBJ_DEL:
|
|
err = sparx5_handle_port_obj_del(dev, nb, ptr);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_ATTR_SET:
|
|
err = switchdev_handle_port_attr_set(dev, ptr,
|
|
sparx5_netdevice_check,
|
|
sparx5_port_attr_set);
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
int sparx5_register_notifier_blocks(struct sparx5 *s5)
|
|
{
|
|
int err;
|
|
|
|
s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
|
|
err = register_netdevice_notifier(&s5->netdevice_nb);
|
|
if (err)
|
|
return err;
|
|
|
|
s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
|
|
err = register_switchdev_notifier(&s5->switchdev_nb);
|
|
if (err)
|
|
goto err_switchdev_nb;
|
|
|
|
s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
|
|
err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
|
|
if (err)
|
|
goto err_switchdev_blocking_nb;
|
|
|
|
sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
|
|
if (!sparx5_owq) {
|
|
err = -ENOMEM;
|
|
goto err_switchdev_blocking_nb;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_switchdev_blocking_nb:
|
|
unregister_switchdev_notifier(&s5->switchdev_nb);
|
|
err_switchdev_nb:
|
|
unregister_netdevice_notifier(&s5->netdevice_nb);
|
|
|
|
return err;
|
|
}
|
|
|
|
void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
|
|
{
|
|
destroy_workqueue(sparx5_owq);
|
|
|
|
unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
|
|
unregister_switchdev_notifier(&s5->switchdev_nb);
|
|
unregister_netdevice_notifier(&s5->netdevice_nb);
|
|
}
|