Re: [PATCH net-next v3 5/8] net: qualcomm: ipqess: add bridge offloading features to the IPQESS driver

Wojciech Drewek
2023-11-16T13:23:53Z

On 14.11.2023 11:55, Romain Gantois wrote:
> The IPQ4019 ESS switch is capable of offloading various bridge features.
> Add netdev and switchdev notifiers to offload bridge uppers, link state
> changes, FDB and MDB accesses and VLANs.
>
> Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
> ---
> drivers/net/dsa/qca/qca8k-8xxx.c | 49 +-
> drivers/net/dsa/qca/qca8k-common.c | 42 +-
> drivers/net/ethernet/qualcomm/Kconfig | 1 +
> drivers/net/ethernet/qualcomm/ipqess/Makefile | 2 +-
> .../ethernet/qualcomm/ipqess/ipqess_edma.c | 7 +
> .../qualcomm/ipqess/ipqess_notifiers.c | 306 +++++
> .../ethernet/qualcomm/ipqess/ipqess_port.c | 1050 +++++++++++++++--
> .../ethernet/qualcomm/ipqess/ipqess_port.h | 33 +
> .../ethernet/qualcomm/ipqess/ipqess_switch.c | 15 +-
> include/linux/dsa/qca8k.h | 16 +-
> 10 files changed, 1391 insertions(+), 130 deletions(-)
> create mode 100644 drivers/net/ethernet/qualcomm/ipqess/ipqess_notifiers.c
>

<...>

>
> diff --git a/drivers/net/ethernet/qualcomm/ipqess/ipqess_notifiers.c b/drivers/net/ethernet/qualcomm/ipqess/ipqess_notifiers.c
> new file mode 100644
> index 000000000000..77f6d79c2ff6
> --- /dev/null
> +++ b/drivers/net/ethernet/qualcomm/ipqess/ipqess_notifiers.c
> @@ -0,0 +1,306 @@
> +// SPDX-License-Identifier: GPL-2.0 OR ISC
> +/*
> + * Copyright (c) 2023, Romain Gantois <romain.gantois@bootlin.com>
> + * Based on net/dsa/slave.c
> + */
> +
> +#include <net/switchdev.h>
> +
> +#include <linux/etherdevice.h>
> +#include <linux/if_vlan.h>
> +#include <linux/if_hsr.h>
> +
> +#include "ipqess_notifiers.h"
> +#include "ipqess_port.h"
> +
> +static struct workqueue_struct *ipqess_owq;
> +
> +static bool ipqess_schedule_work(struct work_struct *work)
> +{
> + return queue_work(ipqess_owq, work);
> +}
> +
> +void ipqess_flush_workqueue(void)
> +{
> + flush_workqueue(ipqess_owq);
> +}

Those two functions look like overkill to me

> +
> +/* switchdev */
> +
> +static int ipqess_port_fdb_event(struct net_device *netdev,
> + struct net_device *orig_netdev,
> + unsigned long event, const void *ctx,
> + const struct switchdev_notifier_fdb_info *fdb_info)
> +{
> + struct ipqess_switchdev_event_work *switchdev_work;
> + struct ipqess_port *port = netdev_priv(netdev);
> + bool host_addr = fdb_info->is_local;
> +
> + if (ctx && ctx != port)
> + return 0;
> +
> + if (!port->bridge)
> + return 0;
> +
> + if (switchdev_fdb_is_dynamically_learned(fdb_info) &&
> + ipqess_port_offloads_bridge_port(port, orig_netdev))
> + return 0;
> +
> + /* Also treat FDB entries on foreign interfaces bridged with us as host
> + * addresses.
> + */
> + if (ipqess_port_dev_is_foreign(netdev, orig_netdev))
> + host_addr = true;
> +
> + switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
> + if (!switchdev_work)
> + return -ENOMEM;
> +
> + netdev_dbg(netdev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
> + event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
> + orig_netdev->name, fdb_info->addr, fdb_info->vid,
> + host_addr ? " as host address" : "");
> +
> + INIT_WORK(&switchdev_work->work, ipqess_port_switchdev_event_work);
> + switchdev_work->event = event;
> + switchdev_work->netdev = netdev;
> + switchdev_work->orig_netdev = orig_netdev;
> +
> + ether_addr_copy(switchdev_work->addr, fdb_info->addr);
> + switchdev_work->vid = fdb_info->vid;
> + switchdev_work->host_addr = host_addr;
> +
> + ipqess_schedule_work(&switchdev_work->work);
> +
> + return 0;
> +}
> +
> +/* Called under rcu_read_lock() */
> +static int ipqess_switchdev_event(struct notifier_block *unused,
> + unsigned long event, void *ptr)
> +{
> + struct net_device *netdev = switchdev_notifier_info_to_dev(ptr);
> + int err;
> +
> + switch (event) {
> + case SWITCHDEV_PORT_ATTR_SET:
> + err = switchdev_handle_port_attr_set(netdev, ptr,
> + ipqess_port_recognize_netdev,
> + ipqess_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(netdev, event, ptr,
> + ipqess_port_recognize_netdev,
> + ipqess_port_dev_is_foreign,
> + ipqess_port_fdb_event);
> + return notifier_from_errno(err);
> + default:
> + return NOTIFY_DONE;
> + }
> +
> + return NOTIFY_OK;
> +}
> +
> +static int ipqess_switchdev_blocking_event(struct notifier_block *unused,
> + unsigned long event, void *ptr)
> +{
> + struct net_device *netdev = switchdev_notifier_info_to_dev(ptr);
> + int err;
> +
> + switch (event) {
> + case SWITCHDEV_PORT_OBJ_ADD:
> + err = switchdev_handle_port_obj_add_foreign(netdev, ptr,
> + ipqess_port_recognize_netdev,
> + ipqess_port_dev_is_foreign,
> + ipqess_port_obj_add);
> + return notifier_from_errno(err);
> + case SWITCHDEV_PORT_OBJ_DEL:
> + err = switchdev_handle_port_obj_del_foreign(netdev, ptr,
> + ipqess_port_recognize_netdev,
> + ipqess_port_dev_is_foreign,
> + ipqess_port_obj_del);
> + return notifier_from_errno(err);
> + case SWITCHDEV_PORT_ATTR_SET:
> + err = switchdev_handle_port_attr_set(netdev, ptr,
> + ipqess_port_recognize_netdev,
> + ipqess_port_attr_set);
> + return notifier_from_errno(err);
> + }
> +
> + return NOTIFY_DONE;
> +}
> +
> +/* netdevice */
> +
> +static int ipqess_port_changeupper(struct net_device *netdev,
> + struct netdev_notifier_changeupper_info *info)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct netlink_ext_ack *extack;
> + int err = NOTIFY_DONE;
> +
> + if (!ipqess_port_recognize_netdev(netdev))

This already done in ipqess_netdevice_event

> + return err;
> +
> + extack = netdev_notifier_info_to_extack(&info->info);
> +
> + if (netif_is_bridge_master(info->upper_dev)) {
> + if (info->linking) {
> + err = ipqess_port_bridge_join(port, info->upper_dev, extack);
> + if (err == -EOPNOTSUPP) {
> + NL_SET_ERR_MSG_WEAK_MOD(extack,
> + "Offloading not supported");
> + err = NOTIFY_DONE;
> + }
> + err = notifier_from_errno(err);
> + } else {
> + ipqess_port_bridge_leave(port, info->upper_dev);
> + err = NOTIFY_OK;
> + }
> + } else if (netif_is_lag_master(info->upper_dev)) {
> + /* LAG offloading is not supported by this driver */
> + NL_SET_ERR_MSG_WEAK_MOD(extack,
> + "Offloading not supported");
> + err = NOTIFY_DONE;
> + } else if (is_hsr_master(info->upper_dev)) {
> + if (info->linking) {
> + NL_SET_ERR_MSG_WEAK_MOD(extack,
> + "Offloading not supported");
> + err = NOTIFY_DONE;
> + } else {
> + err = NOTIFY_OK;
> + }
> + }
> +
> + return err;
> +}
> +
> +static int ipqess_port_prechangeupper(struct net_device *netdev,
> + struct netdev_notifier_changeupper_info *info)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct net_device *brport_dev;
> + int err;
> +
> + /* sanity check */
> + if (is_vlan_dev(info->upper_dev)) {
> + err = ipqess_port_check_8021q_upper(netdev, info);
> + if (notifier_to_errno(err))
> + return err;
> + }
> +
> + /* prechangeupper */
> + if (netif_is_bridge_master(info->upper_dev) && !info->linking)
> + brport_dev = ipqess_port_get_bridged_netdev(port);
> + else
> + return NOTIFY_DONE;
> +
> + if (!brport_dev)
> + return NOTIFY_DONE;
> +
> + switchdev_bridge_port_unoffload(brport_dev, port,
> + &ipqess_switchdev_notifier,
> + &ipqess_switchdev_blocking_notifier);
> +
> + ipqess_flush_workqueue();
> +
> + return NOTIFY_DONE;
> +}
> +
> +static int ipqess_netdevice_event(struct notifier_block *nb,
> + unsigned long event, void *ptr)
> +{
> + struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
> + int err;
> +
> + if (!ipqess_port_recognize_netdev(netdev))
> + return NOTIFY_DONE;
> +
> + switch (event) {
> + case NETDEV_PRECHANGEUPPER: {
> + err = ipqess_port_prechangeupper(netdev, ptr);
> + if (notifier_to_errno(err))
> + return err;
> +
> + break;
> + }
> +
> + case NETDEV_CHANGEUPPER: {
> + err = ipqess_port_changeupper(netdev, ptr);
> + if (notifier_to_errno(err))
> + return err;
> +
> + break;
> + }
> +
> + /* Handling this is only useful for LAG offloading, which this driver
> + * doesn't support
> + */
> + case NETDEV_CHANGELOWERSTATE:
> + return NOTIFY_DONE;
> + case NETDEV_CHANGE:
> + case NETDEV_UP:
> + case NETDEV_GOING_DOWN:
> + default:
> + break;
> + }
> +
> + return NOTIFY_OK;
> +}
> +
> +struct notifier_block ipqess_switchdev_notifier = {
> + .notifier_call = ipqess_switchdev_event,
> +};
> +
> +struct notifier_block ipqess_switchdev_blocking_notifier = {
> + .notifier_call = ipqess_switchdev_blocking_event,
> +};
> +
> +static struct notifier_block ipqess_nb __read_mostly = {
> + .notifier_call = ipqess_netdevice_event,
> +};
> +
> +int ipqess_notifiers_register(void)
> +{
> + int err;
> +
> + ipqess_owq = alloc_ordered_workqueue("ipqess_ordered",
> + WQ_MEM_RECLAIM);
> + if (!ipqess_owq)
> + return -ENOMEM;
> +
> + err = register_netdevice_notifier(&ipqess_nb);
> + if (err)
> + goto err_netdev_nb;
> +
> + err = register_switchdev_notifier(&ipqess_switchdev_notifier);
> + if (err)
> + goto err_switchdev_nb;
> +
> + err = register_switchdev_blocking_notifier(&ipqess_switchdev_blocking_notifier);
> + if (err)
> + goto err_switchdev_blocking_nb;
> +
> + return 0;
> +
> +err_switchdev_blocking_nb:
> + unregister_switchdev_notifier(&ipqess_switchdev_notifier);
> +err_switchdev_nb:
> + unregister_netdevice_notifier(&ipqess_nb);
> +err_netdev_nb:
> + destroy_workqueue(ipqess_owq);
> +
> + return err;
> +}
> +EXPORT_SYMBOL(ipqess_notifiers_register);
> +
> +void ipqess_notifiers_unregister(void)
> +{
> + unregister_switchdev_blocking_notifier(&ipqess_switchdev_blocking_notifier);
> + unregister_switchdev_notifier(&ipqess_switchdev_notifier);
> + unregister_netdevice_notifier(&ipqess_nb);
> +
> + destroy_workqueue(ipqess_owq);
> +}
> +EXPORT_SYMBOL(ipqess_notifiers_unregister);
> diff --git a/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.c b/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.c
> index 52d7baa7cae0..29420820c3d8 100644
> --- a/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.c
> +++ b/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.c
> @@ -23,50 +23,50 @@ static struct device_type ipqess_port_type = {
> .name = "switch",
> };
>
> +struct net_device *ipqess_port_get_bridged_netdev(const struct ipqess_port *port)
> +{
> + if (!port->bridge)
> + return NULL;
> +
> + return port->netdev;
> +}
> +
> /* netdev ops */
>
> +static void ipqess_port_notify_bridge_fdb_flush(const struct ipqess_port *port,
> + u16 vid)
> +{
> + struct net_device *brport_dev = ipqess_port_get_bridged_netdev(port);
> + struct switchdev_notifier_fdb_info info = {
> + .vid = vid,
> + };
> +
> + /* When the port becomes standalone it has already left the bridge.
> + * Don't notify the bridge in that case.
> + */
> + if (!brport_dev)
> + return;
> +
> + call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
> + brport_dev, &info.info, NULL);
> +}
> +
> static void ipqess_port_fast_age(const struct ipqess_port *port)
> {
> struct qca8k_priv *priv = port->sw->priv;
>
> - mutex_lock(&priv->reg_mutex);
> - qca8k_fdb_access(priv, QCA8K_FDB_FLUSH_PORT, port->index);
> - mutex_unlock(&priv->reg_mutex);
> + qca8k_port_fast_age(priv, port->index);
> +
> + /* Flush all VLANs */
> + ipqess_port_notify_bridge_fdb_flush(port, 0);
> }
>
> static void ipqess_port_stp_state_set(struct ipqess_port *port,
> u8 state)
> {
> struct qca8k_priv *priv = port->sw->priv;
> - u32 stp_state;
> - int err;
>
> - switch (state) {
> - case BR_STATE_DISABLED:
> - stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
> - break;
> - case BR_STATE_BLOCKING:
> - stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
> - break;
> - case BR_STATE_LISTENING:
> - stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
> - break;
> - case BR_STATE_LEARNING:
> - stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
> - break;
> - case BR_STATE_FORWARDING:
> - default:
> - stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
> - break;
> - }
> -
> - err = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port->index),
> - QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
> -
> - if (err)
> - dev_warn(priv->dev,
> - "failed to set STP state %d for port %d: err %d\n",
> - stp_state, port->index, err);
> + qca8k_port_stp_state_set(priv, port->index, state, false, false);
> }
>
> static void ipqess_port_set_state_now(struct ipqess_port *port,
> @@ -93,7 +93,8 @@ static int ipqess_port_enable_rt(struct ipqess_port *port,
>
> phy_support_asym_pause(phy);
>
> - ipqess_port_set_state_now(port, BR_STATE_FORWARDING, false);
> + if (!port->bridge)
> + ipqess_port_set_state_now(port, BR_STATE_FORWARDING, false);
>
> if (port->pl)
> phylink_start(port->pl);
> @@ -108,7 +109,8 @@ static void ipqess_port_disable_rt(struct ipqess_port *port)
> if (port->pl)
> phylink_stop(port->pl);
>
> - ipqess_port_set_state_now(port, BR_STATE_DISABLED, false);
> + if (!port->bridge)
> + ipqess_port_set_state_now(port, BR_STATE_DISABLED, false);
>
> qca8k_port_set_status(priv, port->index, 0);
> priv->port_enabled_map &= ~BIT(port->index);
> @@ -204,34 +206,9 @@ static int ipqess_port_change_mtu(struct net_device *dev, int new_mtu)
> return 0;
> }
>
> -static int ipqess_port_do_vlan_add(struct qca8k_priv *priv, int port_index,
> - const struct switchdev_obj_port_vlan *vlan,
> - struct netlink_ext_ack *extack)
> +static inline struct net_device *ipqess_port_bridge_dev_get(struct ipqess_port *port)
> {
> - bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
> - bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
> - int ret;
> -
> - ret = qca8k_vlan_add(priv, port_index, vlan->vid, untagged);
> - if (ret) {
> - dev_err(priv->dev, "Failed to add VLAN to port %d (%d)", port_index,
> - ret);
> - return ret;
> - }
> -
> - if (pvid) {
> - ret = qca8k_rmw(priv, QCA8K_EGRESS_VLAN(port_index),
> - QCA8K_EGREES_VLAN_PORT_MASK(port_index),
> - QCA8K_EGREES_VLAN_PORT(port_index, vlan->vid));
> - if (ret)
> - return ret;
> -
> - ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(port_index),
> - QCA8K_PORT_VLAN_CVID(vlan->vid) |
> - QCA8K_PORT_VLAN_SVID(vlan->vid));
> - }
> -
> - return ret;
> + return port->bridge ? port->bridge->netdev : NULL;
> }
>
> static int ipqess_port_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
> @@ -248,7 +225,7 @@ static int ipqess_port_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
> int ret;
>
> /* User port... */
> - ret = ipqess_port_do_vlan_add(port->sw->priv, port->index, &vlan, &extack);
> + ret = qca8k_port_vlan_add(port->sw->priv, port->index, &vlan, &extack);
> if (ret) {
> if (extack._msg)
> netdev_err(dev, "%s\n", extack._msg);
> @@ -256,7 +233,7 @@ static int ipqess_port_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
> }
>
> /* And CPU port... */
> - ret = ipqess_port_do_vlan_add(port->sw->priv, 0, &vlan, &extack);
> + ret = qca8k_port_vlan_add(port->sw->priv, 0, &vlan, &extack);
> if (ret) {
> if (extack._msg)
> netdev_err(dev, "CPU port %d: %s\n", 0, extack._msg);
> @@ -340,24 +317,13 @@ ipqess_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
> .cb = cb,
> .idx = *idx,
> };
> - int cnt = QCA8K_NUM_FDB_RECORDS;
> - struct qca8k_fdb _fdb = { 0 };
> - bool is_static;
> int ret = 0;
>
> - mutex_lock(&priv->reg_mutex);
> - while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port->index)) {
> - if (!_fdb.aging)
> - break;
> - is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
> - ret = ipqess_port_fdb_do_dump(_fdb.mac, _fdb.vid, is_static, &dump);
> - if (ret)
> - break;
> - }
> - mutex_unlock(&priv->reg_mutex);
> -
> *idx = dump.idx;
>
> + ret = qca8k_port_fdb_dump(priv, port->index, ipqess_port_fdb_do_dump,
> + &dump);
> +
> return ret;
> }
>
> @@ -374,6 +340,882 @@ static const struct net_device_ops ipqess_port_netdev_ops = {
> .ndo_fdb_dump = ipqess_port_fdb_dump,
> };
>
> +/* Bridge ops */
> +
> +static int ipqess_port_bridge_alloc(struct ipqess_port *port,
> + struct net_device *br,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_bridge *bridge;
> +
> + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
> + if (!bridge)
> + return -ENOMEM;
> +
> + refcount_set(&bridge->refcount, 1);
> +
> + bridge->netdev = br;
> +
> + port->bridge = bridge;
> +
> + return 0;
> +}
> +
> +/* Must be called under rcu_read_lock() */
> +static bool ipqess_port_can_apply_vlan_filtering(struct ipqess_port *port,
> + bool vlan_filtering,
> + struct netlink_ext_ack *extack)
> +{
> + int err;
> +
> + /* VLAN awareness was off, so the question is "can we turn it on".
> + * We may have had 8021q uppers, those need to go. Make sure we don't
> + * enter an inconsistent state: deny changing the VLAN awareness state
> + * as long as we have 8021q uppers.
> + */
> + if (vlan_filtering) {

if (!vlan_filtering)
return true;

One indentation level less

> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + struct net_device *upper_dev, *netdev = port->netdev;
> + struct list_head *iter;
> +
> + netdev_for_each_upper_dev_rcu(netdev, upper_dev, iter) {
> + struct bridge_vlan_info br_info;
> + u16 vid;
> +
> + if (!is_vlan_dev(upper_dev))
> + continue;
> +
> + vid = vlan_dev_vlan_id(upper_dev);
> +
> + /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
> + * device, respectively the VID is not found, returning
> + * 0 means success, which is a failure for us here.
> + */
> + err = br_vlan_get_info(br, vid, &br_info);
> + if (err == 0) {
> + NL_SET_ERR_MSG_MOD(extack,
> + "Must first remove VLAN uppers having VIDs also present in bridge");
> + return false;
> + }
> + }
> + }
> +
> + /* VLAN filtering is not global so we can just return true here */
> + return true;
> +}
> +
> +static int ipqess_port_restore_vlan(struct net_device *vdev, int vid, void *arg)
> +{
> + __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
> +
> + return ipqess_port_vlan_rx_add_vid(arg, proto, vid);
> +}
> +
> +static int ipqess_port_clear_vlan(struct net_device *vdev, int vid, void *arg)
> +{
> + __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
> +
> + return ipqess_port_vlan_rx_kill_vid(arg, proto, vid);
> +}
> +
> +/* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
> + * filtering is enabled.
> + */
> +static int ipqess_port_manage_vlan_filtering(struct net_device *netdev,
> + bool vlan_filtering)
> +{
> + int err;
> +
> + if (vlan_filtering) {
> + netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
> +
> + err = vlan_for_each(netdev, ipqess_port_restore_vlan, netdev);
> + if (err) {
> + netdev_err(netdev,
> + "Failed to restore all VLAN's successfully, error %d\n",
> + err);
> + vlan_for_each(netdev, ipqess_port_clear_vlan, netdev);
> + netdev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
> + return err;
> + }
> + } else {
> + err = vlan_for_each(netdev, ipqess_port_clear_vlan, netdev);
> + if (err)
> + return err;
> +
> + netdev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
> + }
> +
> + return 0;
> +}
> +
> +static int ipqess_port_vlan_filtering(struct ipqess_port *port,
> + bool vlan_filtering,
> + struct netlink_ext_ack *extack)
> +{
> + bool old_vlan_filtering = port->vlan_filtering;
> + bool apply;
> + int err;
> +
> + /* We are called from ipqess_port_switchdev_blocking_event(),
> + * which is not under rcu_read_lock(), unlike
> + * ipqess_port_switchdev_event().
> + */
> + rcu_read_lock();

Again, I would move locking inside ipqess_port_can_apply_vlan_filtering

> + apply = ipqess_port_can_apply_vlan_filtering(port, vlan_filtering, extack);
> + rcu_read_unlock();
> + if (!apply)
> + return -EINVAL;
> +
> + if (old_vlan_filtering == vlan_filtering)
> + return 0;
> +
> + err = qca8k_port_vlan_filtering(port->sw->priv, port->index,
> + vlan_filtering);
> +
> + if (err)
> + return err;
> +
> + port->vlan_filtering = vlan_filtering;
> +
> + err = ipqess_port_manage_vlan_filtering(port->netdev,
> + vlan_filtering);
> + if (err)
> + goto restore;
> +
> + return 0;
> +
> +restore:
> + err = qca8k_port_vlan_filtering(port->sw->priv, port->index,
> + old_vlan_filtering);
> + port->vlan_filtering = old_vlan_filtering;
> +
> + return err;
> +}
> +
> +static void ipqess_port_reset_vlan_filtering(struct ipqess_port *port,
> + struct ipqess_bridge *bridge)
> +{
> + struct netlink_ext_ack extack = {0};
> + bool change_vlan_filtering = false;
> + bool vlan_filtering;
> + int err;
> +
> + if (br_vlan_enabled(bridge->netdev)) {
> + change_vlan_filtering = true;
> + vlan_filtering = false;
> + }
> +
> + if (!change_vlan_filtering)
> + return;
> +
> + err = ipqess_port_vlan_filtering(port, vlan_filtering, &extack);
> + if (extack._msg) {
> + dev_err(&port->netdev->dev, "port %d: %s\n", port->index,
> + extack._msg);
> + }

No need for braces

> + if (err && err != -EOPNOTSUPP) {
> + dev_err(&port->netdev->dev,
> + "port %d failed to reset VLAN filtering to %d: %pe\n",
> + port->index, vlan_filtering, ERR_PTR(err));
> + }

Same

> +}
> +
> +static int ipqess_port_ageing_time(struct ipqess_port *port,
> + clock_t ageing_clock)
> +{
> + unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
> + unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
> +
> + if (ageing_time < IPQESS_SWITCH_AGEING_TIME_MIN ||
> + ageing_time > IPQESS_SWITCH_AGEING_TIME_MAX)
> + return -ERANGE;
> +
> + /* Program the fastest ageing time in case of multiple bridges */
> + ageing_time = ipqess_switch_fastest_ageing_time(port->sw, ageing_time);
> +
> + port->ageing_time = ageing_time;
> + return ipqess_set_ageing_time(port->sw, ageing_time);
> +}
> +
> +static int ipqess_port_switchdev_sync_attrs(struct ipqess_port *port,
> + struct netlink_ext_ack *extack)
> +{
> + struct net_device *brport_dev = ipqess_port_get_bridged_netdev(port);
> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + int err;
> +
> + ipqess_port_set_state_now(port, br_port_get_stp_state(brport_dev), false);
> +
> + err = ipqess_port_vlan_filtering(port, br_vlan_enabled(br), extack);
> + if (err)
> + return err;
> +
> + err = ipqess_port_ageing_time(port, br_get_ageing_time(br));
> + if (err && err != -EOPNOTSUPP)
> + return err;
> +
> + return 0;
> +}
> +
> +static void ipqess_port_switchdev_unsync_attrs(struct ipqess_port *port,
> + struct ipqess_bridge *bridge)
> +{
> + /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
> + * so allow it to be in BR_STATE_FORWARDING to be kept functional
> + */
> + ipqess_port_set_state_now(port, BR_STATE_FORWARDING, true);
> +
> + ipqess_port_reset_vlan_filtering(port, bridge);
> +
> + /* Ageing time is global to the switch chip, so don't change it
> + * here because we have no good reason (or value) to change it to.
> + */
> +}
> +
> +static inline bool ipqess_port_offloads_bridge(struct ipqess_port *port,
> + const struct ipqess_bridge *bridge)
> +{
> + return ipqess_port_bridge_dev_get(port) == bridge->netdev;
> +}
> +
> +bool ipqess_port_offloads_bridge_port(struct ipqess_port *port,
> + const struct net_device *netdev)
> +{
> + return ipqess_port_get_bridged_netdev(port) == netdev;
> +}
> +
> +static inline bool
> +ipqess_port_offloads_bridge_dev(struct ipqess_port *port,
> + const struct net_device *bridge_dev)
> +{
> + /* QCA8K ports connected to a bridge, and event was emitted
> + * for the bridge.
> + */
> + return ipqess_port_bridge_dev_get(port) == bridge_dev;
> +}
> +
> +static void ipqess_port_bridge_destroy(struct ipqess_port *port,
> + const struct net_device *br)
> +{
> + struct ipqess_bridge *bridge = port->bridge;
> +
> + port->bridge = NULL;
> +
> + if (!refcount_dec_and_test(&bridge->refcount))
> + return;
> +
> + kfree(bridge);
> +}
> +
> +int ipqess_port_bridge_join(struct ipqess_port *port, struct net_device *br,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_switch *sw = port->sw;
> + struct ipqess_bridge *bridge = NULL;
> + struct qca8k_priv *priv = sw->priv;
> + struct ipqess_port *other_port;
> + struct net_device *brport_dev;
> + int port_id = port->index;
> + int port_mask = 0;
> + int i, err;
> +
> + /* QCA8K doesn't support MST */
> + if (br_mst_enabled(br)) {
> + err = -EOPNOTSUPP;
> + goto out_err;
> + }
> +
> + /* Check if we already registered this bridge with
> + * another switch port
> + */
> + for (i = 0; i < IPQESS_SWITCH_MAX_PORTS; i++) {
> + other_port = sw->port_list[i];
> + if (other_port && other_port->bridge &&
> + other_port->bridge->netdev == br)
> + bridge = other_port->bridge;
> + }
> +
> + if (bridge) {
> + refcount_inc(&bridge->refcount);
> + port->bridge = bridge;
> + } else {
> + err = ipqess_port_bridge_alloc(port, br, extack);
> + if (err)
> + goto out_err;

You already have ipqess_port_bridge_destroy, this could be moved to the
ipqess_port_bridge_create,

> + }
> + bridge = port->bridge;
> +
> + for (i = 1; i <= IPQESS_SWITCH_MAX_PORTS; i++) {
> + other_port = sw->port_list[i - 1];
> + if (!other_port || !ipqess_port_offloads_bridge(other_port, bridge))
> + continue;
> + /* Add this port to the portvlan mask of the other ports
> + * in the bridge
> + */
> + err = regmap_set_bits(priv->regmap,
> + QCA8K_PORT_LOOKUP_CTRL(i),
> + BIT(port_id));
> + if (err)
> + goto out_rollback;
> + if (i != port_id)
> + port_mask |= BIT(i);
> + }
> + /* Also add the CPU port */
> + err = regmap_set_bits(priv->regmap,
> + QCA8K_PORT_LOOKUP_CTRL(0),
> + BIT(port_id));
> + port_mask |= BIT(0);
> +
> + /* Add all other ports to this ports portvlan mask */
> + err = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port_id),
> + QCA8K_PORT_LOOKUP_MEMBER, port_mask);
> + if (err)
> + goto out_rollback;
> +
> + brport_dev = ipqess_port_get_bridged_netdev(port);
> +
> + err = switchdev_bridge_port_offload(brport_dev, port->netdev, port,
> + &ipqess_switchdev_notifier,
> + &ipqess_switchdev_blocking_notifier,
> + false, extack);
> + if (err)
> + goto out_rollback_unbridge;
> +
> + err = ipqess_port_switchdev_sync_attrs(port, extack);
> + if (err)
> + goto out_rollback_unoffload;
> +
> + return 0;
> +
> +out_rollback_unoffload:
> + switchdev_bridge_port_unoffload(brport_dev, port,
> + &ipqess_switchdev_notifier,
> + &ipqess_switchdev_blocking_notifier);
> + ipqess_flush_workqueue();
> +out_rollback_unbridge:
> + for (i = 1; i <= IPQESS_SWITCH_MAX_PORTS; i++) {
> + other_port = sw->port_list[i - 1];
> + if (!other_port ||
> + !ipqess_port_offloads_bridge(other_port, port->bridge))
> + continue;
> + /* Remove this port from the portvlan mask of the other ports
> + * in the bridge
> + */
> + regmap_clear_bits(priv->regmap,
> + QCA8K_PORT_LOOKUP_CTRL(i),
> + BIT(port_id));
> + }
> +
> + /* Set the cpu port to be the only one in the portvlan mask of
> + * this port
> + */
> + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port_id),
> + QCA8K_PORT_LOOKUP_MEMBER, BIT(0));
> +out_rollback:
> + ipqess_port_bridge_destroy(port, br);
> +out_err:
> + dev_err(&port->netdev->dev, "Failed to join bridge: errno %d\n", err);
> + return err;
> +}
> +
> +void ipqess_port_bridge_leave(struct ipqess_port *port, struct net_device *br)
> +{
> + struct ipqess_bridge *bridge = port->bridge;
> + struct ipqess_switch *sw = port->sw;
> + struct qca8k_priv *priv = sw->priv;
> + struct ipqess_port *other_port;
> + int port_id = port->index;
> + int i;
> +
> + /* If the port could not be offloaded to begin with, then
> + * there is nothing to do.
> + */
> + if (!bridge)
> + return;
> +
> + for (i = 1; i <= IPQESS_SWITCH_MAX_PORTS; i++) {
> + other_port = sw->port_list[i - 1];
> + if (!other_port || !ipqess_port_offloads_bridge(other_port, bridge))
> + continue;
> + /* Remove this port from the portvlan mask of the other ports
> + * in the bridge
> + */
> + regmap_clear_bits(priv->regmap,
> + QCA8K_PORT_LOOKUP_CTRL(i),
> + BIT(port_id));
> + }
> +
> + /* Set the cpu port to be the only one in the portvlan mask of
> + * this port
> + */
> + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port_id),
> + QCA8K_PORT_LOOKUP_MEMBER, BIT(0));
> +
> + ipqess_port_switchdev_unsync_attrs(port, bridge);
> +
> + /* Here the port is already unbridged. Reflect the current configuration. */
> +
> + ipqess_port_bridge_destroy(port, br);
> +}
> +
> +int ipqess_port_attr_set(struct net_device *dev, const void *ctx,
> + const struct switchdev_attr *attr,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_port *port = netdev_priv(dev);
> + int ret;
> +
> + if (ctx && ctx != port)
> + return 0;
> +
> + switch (attr->id) {
> + case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
> + if (!ipqess_port_offloads_bridge_port(port, attr->orig_dev))
> + return -EOPNOTSUPP;
> +
> + ipqess_port_set_state_now(port, attr->u.stp_state, true);
> + return 0;
> + case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
> + if (!ipqess_port_offloads_bridge_dev(port, attr->orig_dev))
> + return -EOPNOTSUPP;
> +
> + ret = ipqess_port_vlan_filtering(port, attr->u.vlan_filtering,
> + extack);
> + break;
> + case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
> + if (!ipqess_port_offloads_bridge_dev(port, attr->orig_dev))
> + return -EOPNOTSUPP;
> +
> + ret = ipqess_port_ageing_time(port, attr->u.ageing_time);
> + break;
> + case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
> + if (!ipqess_port_offloads_bridge_port(port, attr->orig_dev))
> + return -EOPNOTSUPP;
> +
> + return -EINVAL;
> + case SWITCHDEV_ATTR_ID_BRIDGE_MST:
> + case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
> + case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
> + case SWITCHDEV_ATTR_ID_VLAN_MSTI:
> + default:
> + ret = -EOPNOTSUPP;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static int ipqess_port_vlan_check_for_8021q_uppers(struct net_device *netdev,
> + const struct switchdev_obj_port_vlan *vlan)
> +{
> + struct net_device *upper_dev;
> + struct list_head *iter;
> +
> + netdev_for_each_upper_dev_rcu(netdev, upper_dev, iter) {
> + u16 vid;
> +
> + if (!is_vlan_dev(upper_dev))
> + continue;
> +
> + vid = vlan_dev_vlan_id(upper_dev);
> + if (vid == vlan->vid)
> + return -EBUSY;

EBUSY feels odd to me

> + }
> +
> + return 0;
> +}
> +
> +static int ipqess_port_host_vlan_del(struct net_device *netdev,
> + const struct switchdev_obj *obj)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + struct switchdev_obj_port_vlan *vlan;
> +
> + /* Do nothing if this is a software bridge */
> + if (!port->bridge)
> + return -EOPNOTSUPP;
> +
> + if (br && !br_vlan_enabled(br))
> + return 0;
> +
> + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
> +
> + return qca8k_vlan_del(port->sw->priv, 0, vlan->vid);
> +}
> +
> +static int ipqess_port_vlan_del(struct net_device *netdev,
> + const struct switchdev_obj *obj)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + struct qca8k_priv *priv = port->sw->priv;
> + struct switchdev_obj_port_vlan *vlan;
> + int ret;
> +
> + if (br && !br_vlan_enabled(br))
> + return 0;
> +
> + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
> +
> + ret = qca8k_vlan_del(priv, port->index, vlan->vid);
> +
> + if (ret)
> + dev_err(priv->dev, "Failed to delete VLAN from port %d (%d)\n",
> + port->index, ret);
> +
> + return ret;
> +}
> +
> +static int ipqess_port_host_vlan_add(struct net_device *netdev,
> + const struct switchdev_obj *obj,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct switchdev_obj_port_vlan *vlan;
> + struct net_device *br;
> +
> + br = ipqess_port_bridge_dev_get(port);
> + /* Do nothing is this is a software bridge */

Do nothing IF this is a software bridge

> + if (!port->bridge)
> + return -EOPNOTSUPP;
> +
> + if (br && !br_vlan_enabled(br)) {
> + NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
> + return 0;
> + }
> +
> + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
> +
> + vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
> +
> + /* Add vid to CPU port */
> + return qca8k_port_vlan_add(port->sw->priv, 0, vlan, extack);
> +}
> +
> +static int ipqess_port_vlan_add(struct net_device *netdev,
> + const struct switchdev_obj *obj,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + struct switchdev_obj_port_vlan *vlan;
> + int err;
> +
> + if (br && !br_vlan_enabled(br)) {
> + NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
> + return 0;
> + }
> +
> + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
> +
> + /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
> + * the same VID.
> + */
> + if (br && br_vlan_enabled(br)) {
> + rcu_read_lock();

I'd move locking inside ipqess_port_vlan_check_for_8021q_uppers. Someone could
use in the future and forget about locks.

> + err = ipqess_port_vlan_check_for_8021q_uppers(netdev, vlan);
> + rcu_read_unlock();
> + if (err) {
> + NL_SET_ERR_MSG_MOD(extack,
> + "Port already has a VLAN upper with this VID");
> + return err;
> + }
> + }
> +
> + err = qca8k_port_vlan_add(port->sw->priv, port->index, vlan, extack);
> + return err;
> +}
> +
> +static int ipqess_port_host_mdb_del(struct ipqess_port *port,
> + const struct switchdev_obj_port_mdb *mdb)
> +{
> + struct qca8k_priv *priv = port->sw->priv;
> + const u8 *addr = mdb->addr;
> + u16 vid = mdb->vid;
> +
> + return qca8k_fdb_search_and_del(priv, BIT(0), addr, vid);
> +}
> +
> +static int ipqess_port_host_mdb_add(struct ipqess_port *port,
> + const struct switchdev_obj_port_mdb *mdb)
> +{
> + struct qca8k_priv *priv = port->sw->priv;
> + const u8 *addr = mdb->addr;
> + u16 vid = mdb->vid;
> +
> + return qca8k_fdb_search_and_insert(priv, BIT(0), addr, vid,
> + QCA8K_ATU_STATUS_STATIC);
> +}
> +
> +static int ipqess_port_mdb_del(struct ipqess_port *port,
> + const struct switchdev_obj_port_mdb *mdb)
> +{
> + struct qca8k_priv *priv = port->sw->priv;
> + const u8 *addr = mdb->addr;
> + u16 vid = mdb->vid;
> +
> + return qca8k_fdb_search_and_del(priv, BIT(port->index), addr, vid);
> +}
> +
> +static int ipqess_port_mdb_add(struct ipqess_port *port,
> + const struct switchdev_obj_port_mdb *mdb)
> +{
> + struct qca8k_priv *priv = port->sw->priv;
> + const u8 *addr = mdb->addr;
> + u16 vid = mdb->vid;
> +
> + return qca8k_fdb_search_and_insert(priv, BIT(port->index), addr, vid,
> + QCA8K_ATU_STATUS_STATIC);
> +}
> +
> +int ipqess_port_obj_add(struct net_device *netdev, const void *ctx,
> + const struct switchdev_obj *obj,
> + struct netlink_ext_ack *extack)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + int err;
> +
> + if (ctx && ctx != port)
> + return 0;
> +
> + switch (obj->id) {
> + case SWITCHDEV_OBJ_ID_PORT_MDB:
> + if (!ipqess_port_offloads_bridge_port(port, obj->orig_dev))
> + return -EOPNOTSUPP;
> +
> + err = ipqess_port_mdb_add(port, SWITCHDEV_OBJ_PORT_MDB(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_HOST_MDB:
> + if (!ipqess_port_offloads_bridge_dev(port, obj->orig_dev))
> + return -EOPNOTSUPP;
> +
> + err = ipqess_port_host_mdb_add(port, SWITCHDEV_OBJ_PORT_MDB(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_PORT_VLAN:
> + if (ipqess_port_offloads_bridge_port(port, obj->orig_dev))
> + err = ipqess_port_vlan_add(netdev, obj, extack);
> + else
> + err = ipqess_port_host_vlan_add(netdev, obj, extack);
> + break;
> + case SWITCHDEV_OBJ_ID_MRP:
> + case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
> + default:
> + err = -EOPNOTSUPP;
> + break;
> + }
> +
> + return err;
> +}
> +
> +int ipqess_port_obj_del(struct net_device *netdev, const void *ctx,
> + const struct switchdev_obj *obj)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + int err;
> +
> + if (ctx && ctx != port)
> + return 0;
> +
> + switch (obj->id) {
> + case SWITCHDEV_OBJ_ID_PORT_MDB:
> + if (!ipqess_port_offloads_bridge_port(port, obj->orig_dev))
> + return -EOPNOTSUPP;
> +
> + err = ipqess_port_mdb_del(port, SWITCHDEV_OBJ_PORT_MDB(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_HOST_MDB:
> + if (!ipqess_port_offloads_bridge_dev(port, obj->orig_dev))
> + return -EOPNOTSUPP;
> +
> + err = ipqess_port_host_mdb_del(port, SWITCHDEV_OBJ_PORT_MDB(obj));
> + break;
> + case SWITCHDEV_OBJ_ID_PORT_VLAN:
> + if (ipqess_port_offloads_bridge_port(port, obj->orig_dev))
> + err = ipqess_port_vlan_del(netdev, obj);
> + else
> + err = ipqess_port_host_vlan_del(netdev, obj);
> + break;
> + case SWITCHDEV_OBJ_ID_MRP:
> + case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
> + default:
> + err = -EOPNOTSUPP;
> + break;
> + }
> +
> + return err;
> +}
> +
> +static int ipqess_cpu_port_fdb_del(struct ipqess_port *port,
> + const unsigned char *addr, u16 vid)
> +{
> + struct ipqess_mac_addr *mac_addr = NULL;
> + struct ipqess_mac_addr *other_mac_addr;
> + struct ipqess_switch *sw = port->sw;
> + int err = 0;
> +
> + mutex_lock(&sw->addr_lists_lock);
> +
> + list_for_each_entry(other_mac_addr, &sw->fdbs, list)
> + if (ether_addr_equal(other_mac_addr->addr, addr) && other_mac_addr->vid == vid)
> + mac_addr = other_mac_addr;

Consider storing the fdbs in rhashtable, it's faster when you want to retrieve one given fdb.

> +
> + if (!mac_addr) {
> + err = -ENOENT;
> + goto out;
> + }
> +
> + if (!refcount_dec_and_test(&mac_addr->refcount))
> + goto out;
> +
> + err = qca8k_fdb_del(sw->priv, addr, BIT(IPQESS_SWITCH_CPU_PORT), vid);
> + if (err) {
> + refcount_set(&mac_addr->refcount, 1);
> + goto out;
> + }
> +
> + list_del(&mac_addr->list);
> + kfree(mac_addr);
> +
> +out:
> + mutex_unlock(&sw->addr_lists_lock);
> +
> + return err;
> +}
> +
> +static int ipqess_cpu_port_fdb_add(struct ipqess_port *port,
> + const unsigned char *addr, u16 vid)
> +{
> + struct ipqess_switch *sw = port->sw;
> + struct ipqess_mac_addr *other_a = NULL;
> + struct ipqess_mac_addr *a = NULL;
> + int err = 0;
> +
> + mutex_lock(&sw->addr_lists_lock);
> +
> + list_for_each_entry(other_a, &sw->fdbs, list)
> + if (ether_addr_equal(other_a->addr, addr) && other_a->vid == vid)
> + a = other_a;
> +
> + if (a) {
> + refcount_inc(&a->refcount);
> + goto out;
> + }
> +
> + a = kzalloc(sizeof(*a), GFP_KERNEL);
> + if (!a) {
> + err = -ENOMEM;
> + goto out;
> + }
> +
> + err = qca8k_port_fdb_insert(port->sw->priv, addr,
> + BIT(IPQESS_SWITCH_CPU_PORT), vid);
> + if (err) {
> + kfree(a);
> + goto out;
> + }
> +
> + ether_addr_copy(a->addr, addr);
> + a->vid = vid;
> + refcount_set(&a->refcount, 1);
> + list_add_tail(&a->list, &sw->fdbs);
> +
> +out:
> + mutex_unlock(&sw->addr_lists_lock);
> +
> + return err;
> +}
> +
> +static void
> +ipqess_fdb_offload_notify(struct ipqess_switchdev_event_work *switchdev_work)
> +{
> + struct switchdev_notifier_fdb_info info = {};
> +
> + info.addr = switchdev_work->addr;
> + info.vid = switchdev_work->vid;
> + info.offloaded = true;
> + call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
> + switchdev_work->orig_netdev, &info.info, NULL);
> +}
> +
> +void ipqess_port_switchdev_event_work(struct work_struct *work)
> +{
> + struct ipqess_switchdev_event_work *switchdev_work =
> + container_of(work, struct ipqess_switchdev_event_work, work);
> + struct net_device *netdev = switchdev_work->netdev;
> + const unsigned char *addr = switchdev_work->addr;
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct ipqess_switch *sw = port->sw;
> + struct qca8k_priv *priv = sw->priv;
> + u16 vid = switchdev_work->vid;
> + int err;
> +
> + if (!vid)
> + vid = QCA8K_PORT_VID_DEF;
> +
> + switch (switchdev_work->event) {
> + case SWITCHDEV_FDB_ADD_TO_DEVICE:
> + if (switchdev_work->host_addr)
> + err = ipqess_cpu_port_fdb_add(port, addr, vid);
> + else
> + err = qca8k_port_fdb_insert(priv, addr, BIT(port->index), vid);
> + if (err) {
> + dev_err(&port->netdev->dev,
> + "port %d failed to add %pM vid %d to fdb: %d\n",
> + port->index, addr, vid, err);
> + break;
> + }
> + ipqess_fdb_offload_notify(switchdev_work);
> + break;
> +
> + case SWITCHDEV_FDB_DEL_TO_DEVICE:
> + if (switchdev_work->host_addr)
> + err = ipqess_cpu_port_fdb_del(port, addr, vid);
> + else
> + err = qca8k_fdb_del(priv, addr, BIT(port->index), vid);
> + if (err) {
> + dev_err(&port->netdev->dev,
> + "port %d failed to delete %pM vid %d from fdb: %d\n",
> + port->index, addr, vid, err);
> + }
> +
> + break;
> + }
> +
> + kfree(switchdev_work);
> +}
> +
> +int ipqess_port_check_8021q_upper(struct net_device *netdev,
> + struct netdev_notifier_changeupper_info *info)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct net_device *br = ipqess_port_bridge_dev_get(port);
> + struct bridge_vlan_info br_info;
> + struct netlink_ext_ack *extack;
> + int err = NOTIFY_DONE;
> + u16 vid;

RCT

> +
> + if (!br || !br_vlan_enabled(br))
> + return NOTIFY_DONE;
> +
> + extack = netdev_notifier_info_to_extack(&info->info);
> + vid = vlan_dev_vlan_id(info->upper_dev);
> +
> + /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
> + * device, respectively the VID is not found, returning
> + * 0 means success, which is a failure for us here.
> + */
> + err = br_vlan_get_info(br, vid, &br_info);
> + if (err == 0) {

Could be if (!err)

> + NL_SET_ERR_MSG_MOD(extack,
> + "This VLAN is already configured by the bridge");
> + return notifier_from_errno(-EBUSY);
> + }
> +
> + return NOTIFY_DONE;
> +}
> +
> /* phylink ops */
>
> static void
> @@ -669,6 +1511,7 @@ int ipqess_port_register(struct ipqess_switch *sw,
> port->edma = NULL; /* Assigned during edma initialization */
> port->qid = port->index - 1;
> port->sw = sw;
> + port->bridge = NULL;
>
> of_get_mac_address(port_node, port->mac);
> if (!is_zero_ether_addr(port->mac))
> @@ -756,3 +1599,58 @@ void ipqess_port_unregister(struct ipqess_port *port)
> free_netdev(netdev);
> }
>
> +/* Utilities */
> +
> +/* Returns true if any port of this switch offloads the given net_device */
> +static bool ipqess_switch_offloads_bridge_port(struct ipqess_switch *sw,
> + const struct net_device *netdev)
> +{
> + struct ipqess_port *port;
> + int i;
> +
> + for (i = 0; i < IPQESS_SWITCH_MAX_PORTS; i++) {
> + port = sw->port_list[i];
> + if (port && ipqess_port_offloads_bridge_port(port, netdev))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +/* Returns true if any port of this switch offloads the given bridge */
> +static inline bool
> +ipqess_switch_offloads_bridge_dev(struct ipqess_switch *sw,
> + const struct net_device *bridge_dev)
> +{
> + struct ipqess_port *port;
> + int i;
> +
> + for (i = 0; i < IPQESS_SWITCH_MAX_PORTS; i++) {
> + port = sw->port_list[i];
> + if (port && ipqess_port_offloads_bridge_dev(port, bridge_dev))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +bool ipqess_port_recognize_netdev(const struct net_device *netdev)
> +{
> + return netdev->netdev_ops == &ipqess_port_netdev_ops;
> +}
> +
> +bool ipqess_port_dev_is_foreign(const struct net_device *netdev,
> + const struct net_device *foreign_netdev)
> +{
> + struct ipqess_port *port = netdev_priv(netdev);
> + struct ipqess_switch *sw = port->sw;
> +
> + if (netif_is_bridge_master(foreign_netdev))
> + return !ipqess_switch_offloads_bridge_dev(sw, foreign_netdev);
> +
> + if (netif_is_bridge_port(foreign_netdev))
> + return !ipqess_switch_offloads_bridge_port(sw, foreign_netdev);
> +
> + /* Everything else is foreign */
> + return true;
> +}
> diff --git a/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.h b/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.h
> index 19d4b5d73625..00f0dff9c39d 100644
> --- a/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.h
> +++ b/drivers/net/ethernet/qualcomm/ipqess/ipqess_port.h
> @@ -9,6 +9,11 @@
> #include "ipqess_edma.h"
> #include "ipqess_switch.h"
>
> +struct ipqess_bridge {
> + struct net_device *netdev;
> + refcount_t refcount;
> +};
> +
> struct ipqess_port {
> u16 index;
> u16 qid;
> @@ -20,6 +25,7 @@ struct ipqess_port {
> struct device_node *dn;
> struct mii_bus *mii_bus;
> struct net_device *netdev;
> + struct ipqess_bridge *bridge;
> struct devlink_port devlink_port;
>
> u8 stp_state;
> @@ -62,4 +68,31 @@ void ipqess_port_unregister(struct ipqess_port *port);
> /* Defined in ipqess_ethtool.c */
> void ipqess_port_set_ethtool_ops(struct net_device *netdev);
>
> +bool ipqess_port_recognize_netdev(const struct net_device *netdev);
> +bool ipqess_port_dev_is_foreign(const struct net_device *netdev,
> + const struct net_device *foreign_netdev);
> +
> +int ipqess_port_bridge_join(struct ipqess_port *port, struct net_device *br,
> + struct netlink_ext_ack *extack);
> +void ipqess_port_bridge_leave(struct ipqess_port *port, struct net_device *br);
> +
> +int ipqess_port_attr_set(struct net_device *dev, const void *ctx,
> + const struct switchdev_attr *attr,
> + struct netlink_ext_ack *extack);
> +
> +void ipqess_port_switchdev_event_work(struct work_struct *work);
> +
> +int ipqess_port_check_8021q_upper(struct net_device *netdev,
> + struct netdev_notifier_changeupper_info *info);
> +
> +struct net_device *ipqess_port_get_bridged_netdev(const struct ipqess_port *port);
> +
> +int ipqess_port_obj_add(struct net_device *netdev, const void *ctx,
> + const struct switchdev_obj *obj,
> + struct netlink_ext_ack *extack);
> +int ipqess_port_obj_del(struct net_device *netdev, const void *ctx,
> + const struct switchdev_obj *obj);
> +
> +bool ipqess_port_offloads_bridge_port(struct ipqess_port *port,
> + const struct net_device *netdev);
> #endif
> diff --git a/drivers/net/ethernet/qualcomm/ipqess/ipqess_switch.c b/drivers/net/ethernet/qualcomm/ipqess/ipqess_switch.c
> index 927f834a62bc..d09d0aa8314f 100644
> --- a/drivers/net/ethernet/qualcomm/ipqess/ipqess_switch.c
> +++ b/drivers/net/ethernet/qualcomm/ipqess/ipqess_switch.c
> @@ -80,21 +80,8 @@ unsigned int ipqess_switch_fastest_ageing_time(struct ipqess_switch *sw,
> int ipqess_set_ageing_time(struct ipqess_switch *sw, unsigned int msecs)
> {
> struct qca8k_priv *priv = sw->priv;
> - unsigned int secs = msecs / 1000;
> - u32 val;
>
> - /* AGE_TIME reg is set in 7s step */
> - val = secs / 7;
> -
> - /* Handle case with 0 as val to NOT disable
> - * learning
> - */
> - if (!val)
> - val = 1;
> -
> - return regmap_update_bits(priv->regmap, QCA8K_REG_ATU_CTRL,
> - QCA8K_ATU_AGE_TIME_MASK,
> - QCA8K_ATU_AGE_TIME(val));
> + return qca8k_set_ageing_time(priv, msecs);
> }
>
> static struct qca8k_pcs *pcs_to_qca8k_pcs(struct phylink_pcs *pcs)
> diff --git a/include/linux/dsa/qca8k.h b/include/linux/dsa/qca8k.h
> index cafb727f4e8b..9ad016f7201e 100644
> --- a/include/linux/dsa/qca8k.h
> +++ b/include/linux/dsa/qca8k.h
> @@ -553,7 +553,8 @@ int qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee);
> int qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e);
>
> /* Common bridge function */
> -void qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state);
> +void qca8k_port_stp_state_set(struct qca8k_priv *priv, int port, u8 state,
> + bool port_learning, int set_learning);
> int qca8k_port_pre_bridge_flags(struct dsa_switch *ds, int port,
> struct switchdev_brport_flags flags,
> struct netlink_ext_ack *extack);
> @@ -577,8 +578,8 @@ int qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu);
> int qca8k_port_max_mtu(struct dsa_switch *ds, int port);
>
> /* Common fast age function */
> -void qca8k_port_fast_age(struct dsa_switch *ds, int port);
> -int qca8k_set_ageing_time(struct dsa_switch *ds, unsigned int msecs);
> +void qca8k_port_fast_age(struct qca8k_priv *priv, int port);
> +int qca8k_set_ageing_time(struct qca8k_priv *priv, unsigned int msecs);
>
> /* Common FDB function */
> int qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
> @@ -589,7 +590,7 @@ int qca8k_port_fdb_add(struct dsa_switch *ds, int port,
> int qca8k_port_fdb_del(struct dsa_switch *ds, int port,
> const unsigned char *addr, u16 vid,
> struct dsa_db db);
> -int qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
> +int qca8k_port_fdb_dump(struct qca8k_priv *priv, int port,
> dsa_fdb_dump_cb_t *cb, void *data);
> int qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac,
> u16 port_mask, u16 vid);
> @@ -618,13 +619,12 @@ void qca8k_port_mirror_del(struct dsa_switch *ds, int port,
> struct dsa_mall_mirror_tc_entry *mirror);
>
> /* Common port VLAN function */
> -int qca8k_port_vlan_filtering(struct dsa_switch *ds, int port,
> - bool vlan_filtering,
> - struct netlink_ext_ack *extack);
> +int qca8k_port_vlan_filtering(struct qca8k_priv *priv, int port,
> + bool vlan_filtering);
> int qca8k_vlan_add(struct qca8k_priv *priv, u8 port, u16 vid,
> bool untagged);
> int qca8k_vlan_del(struct qca8k_priv *priv, u8 port, u16 vid);
> -int qca8k_port_vlan_add(struct dsa_switch *ds, int port,
> +int qca8k_port_vlan_add(struct qca8k_priv *priv, int port,
> const struct switchdev_obj_port_vlan *vlan,
> struct netlink_ext_ack *extack);
> int qca8k_port_vlan_del(struct dsa_switch *ds, int port,