[linux-block.git] / drivers / net / ethernet / microchip / sparx5 / sparx5_switchdev.c

// SPDX-License-Identifier: GPL-2.0+
/* Microchip Sparx5 Switch driver
 *
 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
 */

#include <linux/if_bridge.h>
#include <net/switchdev.h>

#include "sparx5_main_regs.h"
#include "sparx5_main.h"

static struct workqueue_struct *sparx5_owq;

struct sparx5_switchdev_event_work {
	struct work_struct work;
	struct switchdev_notifier_fdb_info fdb_info;
	struct net_device *dev;
	struct sparx5 *sparx5;
	unsigned long event;
};

static int sparx5_port_attr_pre_bridge_flags(struct sparx5_port *port,
					     struct switchdev_brport_flags flags)
{
	if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD))
		return -EINVAL;

	return 0;
}

static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
					  struct switchdev_brport_flags flags)
{
	int pgid;

	if (flags.mask & BR_MCAST_FLOOD)
		for (pgid = PGID_MC_FLOOD; pgid <= PGID_IPV6_MC_CTRL; pgid++)
			sparx5_pgid_update_mask(port, pgid, !!(flags.val & BR_MCAST_FLOOD));
	if (flags.mask & BR_FLOOD)
		sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
	if (flags.mask & BR_BCAST_FLOOD)
		sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
}

static void sparx5_attr_stp_state_set(struct sparx5_port *port,
				      u8 state)
{
	struct sparx5 *sparx5 = port->sparx5;

	if (!test_bit(port->portno, sparx5->bridge_mask)) {
		netdev_err(port->ndev,
			   "Controlling non-bridged port %d?\n", port->portno);
		return;
	}

	switch (state) {
	case BR_STATE_FORWARDING:
		set_bit(port->portno, sparx5->bridge_fwd_mask);
		fallthrough;
	case BR_STATE_LEARNING:
		set_bit(port->portno, sparx5->bridge_lrn_mask);
		break;

	default:
		/* All other states treated as blocking */
		clear_bit(port->portno, sparx5->bridge_fwd_mask);
		clear_bit(port->portno, sparx5->bridge_lrn_mask);
		break;
	}

	/* apply the bridge_fwd_mask to all the ports */
	sparx5_update_fwd(sparx5);
}

static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
					unsigned long ageing_clock_t)
{
	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
	u32 ageing_time = jiffies_to_msecs(ageing_jiffies);

	sparx5_set_ageing(port->sparx5, ageing_time);
}

static int sparx5_port_attr_set(struct net_device *dev, const void *ctx,
				const struct switchdev_attr *attr,
				struct netlink_ext_ack *extack)
{
	struct sparx5_port *port = netdev_priv(dev);

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
		return sparx5_port_attr_pre_bridge_flags(port,
							 attr->u.brport_flags);
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
		sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
		break;
	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
		sparx5_attr_stp_state_set(port, attr->u.stp_state);
		break;
	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
		sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
		break;
	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
		/* Used PVID 1 when default_pvid is 0, to avoid
		 * collision with non-bridged ports.
		 */
		if (port->pvid == 0)
			port->pvid = 1;
		port->vlan_aware = attr->u.vlan_filtering;
		sparx5_vlan_port_apply(port->sparx5, port);
		break;
	default:
		return -EOPNOTSUPP;
	}

	return 0;
}

static int sparx5_port_bridge_join(struct sparx5_port *port,
				   struct net_device *bridge,
				   struct netlink_ext_ack *extack)
{
	struct sparx5 *sparx5 = port->sparx5;
	struct net_device *ndev = port->ndev;
	int err;

	if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
		/* First bridged port */
		sparx5->hw_bridge_dev = bridge;
	else
		if (sparx5->hw_bridge_dev != bridge)
			/* This is adding the port to a second bridge, this is
			 * unsupported
			 */
			return -ENODEV;

	set_bit(port->portno, sparx5->bridge_mask);

	err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
					    false, extack);
	if (err)
		goto err_switchdev_offload;

	/* Remove standalone port entry */
	sparx5_mact_forget(sparx5, ndev->dev_addr, 0);

	/* Port enters in bridge mode therefor don't need to copy to CPU
	 * frames for multicast in case the bridge is not requesting them
	 */
	__dev_mc_unsync(ndev, sparx5_mc_unsync);

	return 0;

err_switchdev_offload:
	clear_bit(port->portno, sparx5->bridge_mask);
	return err;
}

static void sparx5_port_bridge_leave(struct sparx5_port *port,
				     struct net_device *bridge)
{
	struct sparx5 *sparx5 = port->sparx5;

	switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);

	clear_bit(port->portno, sparx5->bridge_mask);
	if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
		sparx5->hw_bridge_dev = NULL;

	/* Clear bridge vlan settings before updating the port settings */
	port->vlan_aware = 0;
	port->pvid = NULL_VID;
	port->vid = NULL_VID;

	/* Forward frames to CPU */
	sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);

	/* Port enters in host more therefore restore mc list */
	__dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
}

static int sparx5_port_changeupper(struct net_device *dev,
				   struct netdev_notifier_changeupper_info *info)
{
	struct sparx5_port *port = netdev_priv(dev);
	struct netlink_ext_ack *extack;
	int err = 0;

	extack = netdev_notifier_info_to_extack(&info->info);

	if (netif_is_bridge_master(info->upper_dev)) {
		if (info->linking)
			err = sparx5_port_bridge_join(port, info->upper_dev,
						      extack);
		else
			sparx5_port_bridge_leave(port, info->upper_dev);

		sparx5_vlan_port_apply(port->sparx5, port);
	}

	return err;
}

static int sparx5_port_add_addr(struct net_device *dev, bool up)
{
	struct sparx5_port *port = netdev_priv(dev);
	struct sparx5 *sparx5 = port->sparx5;
	u16 vid = port->pvid;

	if (up)
		sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
	else
		sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);

	return 0;
}

static int sparx5_netdevice_port_event(struct net_device *dev,
				       struct notifier_block *nb,
				       unsigned long event, void *ptr)
{
	int err = 0;

	if (!sparx5_netdevice_check(dev))
		return 0;

	switch (event) {
	case NETDEV_CHANGEUPPER:
		err = sparx5_port_changeupper(dev, ptr);
		break;
	case NETDEV_PRE_UP:
		err = sparx5_port_add_addr(dev, true);
		break;
	case NETDEV_DOWN:
		err = sparx5_port_add_addr(dev, false);
		break;
	}

	return err;
}

static int sparx5_netdevice_event(struct notifier_block *nb,
				  unsigned long event, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	int ret = 0;

	ret = sparx5_netdevice_port_event(dev, nb, event, ptr);

	return notifier_from_errno(ret);
}

static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
{
	struct sparx5_switchdev_event_work *switchdev_work =
		container_of(work, struct sparx5_switchdev_event_work, work);
	struct net_device *dev = switchdev_work->dev;
	struct switchdev_notifier_fdb_info *fdb_info;
	struct sparx5_port *port;
	struct sparx5 *sparx5;
	bool host_addr;
	u16 vid;

	rtnl_lock();
	if (!sparx5_netdevice_check(dev)) {
		host_addr = true;
		sparx5 = switchdev_work->sparx5;
	} else {
		host_addr = false;
		sparx5 = switchdev_work->sparx5;
		port = netdev_priv(dev);
	}

	fdb_info = &switchdev_work->fdb_info;

	/* Used PVID 1 when default_pvid is 0, to avoid
	 * collision with non-bridged ports.
	 */
	if (fdb_info->vid == 0)
		vid = 1;
	else
		vid = fdb_info->vid;

	switch (switchdev_work->event) {
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
		if (host_addr)
			sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
					      fdb_info->addr, vid);
		else
			sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
					      fdb_info->addr, vid);
		break;
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
		sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
		break;
	}

	rtnl_unlock();
	kfree(switchdev_work->fdb_info.addr);
	kfree(switchdev_work);
	dev_put(dev);
}

static void sparx5_schedule_work(struct work_struct *work)
{
	queue_work(sparx5_owq, work);
}

static int sparx5_switchdev_event(struct notifier_block *nb,
				  unsigned long event, void *ptr)
{
	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	struct sparx5_switchdev_event_work *switchdev_work;
	struct switchdev_notifier_fdb_info *fdb_info;
	struct switchdev_notifier_info *info = ptr;
	struct sparx5 *spx5;
	int err;

	spx5 = container_of(nb, struct sparx5, switchdev_nb);

	switch (event) {
	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);
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
		fallthrough;
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
		switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
		if (!switchdev_work)
			return NOTIFY_BAD;

		switchdev_work->dev = dev;
		switchdev_work->event = event;
		switchdev_work->sparx5 = spx5;

		fdb_info = container_of(info,
					struct switchdev_notifier_fdb_info,
					info);
		INIT_WORK(&switchdev_work->work,
			  sparx5_switchdev_bridge_fdb_event_work);
		memcpy(&switchdev_work->fdb_info, ptr,
		       sizeof(switchdev_work->fdb_info));
		switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
		if (!switchdev_work->fdb_info.addr)
			goto err_addr_alloc;

		ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
				fdb_info->addr);
		dev_hold(dev);

		sparx5_schedule_work(&switchdev_work->work);
		break;
	}

	return NOTIFY_DONE;
err_addr_alloc:
	kfree(switchdev_work);
	return NOTIFY_BAD;
}

static int sparx5_handle_port_vlan_add(struct net_device *dev,
				       struct notifier_block *nb,
				       const struct switchdev_obj_port_vlan *v)
{
	struct sparx5_port *port = netdev_priv(dev);

	if (netif_is_bridge_master(dev)) {
		struct sparx5 *sparx5 =
			container_of(nb, struct sparx5,
				     switchdev_blocking_nb);

		/* Flood broadcast to CPU */
		sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
				  v->vid);
		return 0;
	}

	if (!sparx5_netdevice_check(dev))
		return -EOPNOTSUPP;

	return sparx5_vlan_vid_add(port, v->vid,
				  v->flags & BRIDGE_VLAN_INFO_PVID,
				  v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
}

static int sparx5_handle_port_mdb_add(struct net_device *dev,
				      struct notifier_block *nb,
				      const struct switchdev_obj_port_mdb *v)
{
	struct sparx5_port *port = netdev_priv(dev);
	struct sparx5 *spx5 = port->sparx5;
	u16 pgid_idx, vid;
	u32 mact_entry;
	int res, err;

	if (netif_is_bridge_master(v->obj.orig_dev)) {
		sparx5_mact_learn(spx5, PGID_CPU, v->addr, v->vid);
		return 0;
	}

	/* When VLAN unaware the vlan value is not parsed and we receive vid 0.
	 * Fall back to bridge vid 1.
	 */
	if (!br_vlan_enabled(spx5->hw_bridge_dev))
		vid = 1;
	else
		vid = v->vid;

	res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);

	if (res == 0) {
		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, true);
	} else {
		err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
		if (err) {
			netdev_warn(dev, "multicast pgid table full\n");
			return err;
		}
		sparx5_pgid_update_mask(port, pgid_idx, true);
		err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
		if (err) {
			netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
			sparx5_pgid_update_mask(port, pgid_idx, false);
			return err;
		}
	}

	return 0;
}

static int sparx5_mdb_del_entry(struct net_device *dev,
				struct sparx5 *spx5,
				const unsigned char mac[ETH_ALEN],
				const u16 vid,
				u16 pgid_idx)
{
	int err;

	err = sparx5_mact_forget(spx5, mac, vid);
	if (err) {
		netdev_warn(dev, "could not forget mac address %pM", mac);
		return err;
	}
	err = sparx5_pgid_free(spx5, pgid_idx);
	if (err) {
		netdev_err(dev, "attempted to free already freed pgid\n");
		return err;
	}
	return 0;
}

static int sparx5_handle_port_mdb_del(struct net_device *dev,
				      struct notifier_block *nb,
				      const struct switchdev_obj_port_mdb *v)
{
	struct sparx5_port *port = netdev_priv(dev);
	struct sparx5 *spx5 = port->sparx5;
	u16 pgid_idx, vid;
	u32 mact_entry, res, pgid_entry[3];
	int err;

	if (netif_is_bridge_master(v->obj.orig_dev)) {
		sparx5_mact_forget(spx5, v->addr, v->vid);
		return 0;
	}

	if (!br_vlan_enabled(spx5->hw_bridge_dev))
		vid = 1;
	else
		vid = v->vid;

	res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);

	if (res == 0) {
		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);
}
Commit	Line	Data
d6fce514 SH	1	// SPDX-License-Identifier: GPL-2.0+
	2	/* Microchip Sparx5 Switch driver
	3	*
	4	* Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
	5	*/
	6
	7	#include <linux/if_bridge.h>
	8	#include <net/switchdev.h>
	9
	10	#include "sparx5_main_regs.h"
	11	#include "sparx5_main.h"
	12
	13	static struct workqueue_struct *sparx5_owq;
	14
	15	struct sparx5_switchdev_event_work {
	16	struct work_struct work;
	17	struct switchdev_notifier_fdb_info fdb_info;
	18	struct net_device *dev;
9f01cfbf	19	struct sparx5 *sparx5;
d6fce514 SH	20	unsigned long event;
	21	};
	22
06388a03 CA	23	static int sparx5_port_attr_pre_bridge_flags(struct sparx5_port *port,
	24	struct switchdev_brport_flags flags)
	25	{
	26	if (flags.mask & ~(BR_FLOOD \| BR_MCAST_FLOOD \| BR_BCAST_FLOOD))
	27	return -EINVAL;
	28
	29	return 0;
	30	}
	31
d6fce514 SH	32	static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
	33	struct switchdev_brport_flags flags)
	34	{
06388a03 CA	35	int pgid;
06388a03 CA	36
d6fce514	37	if (flags.mask & BR_MCAST_FLOOD)
06388a03 CA	38	for (pgid = PGID_MC_FLOOD; pgid <= PGID_IPV6_MC_CTRL; pgid++)
	39	sparx5_pgid_update_mask(port, pgid, !!(flags.val & BR_MCAST_FLOOD));
	40	if (flags.mask & BR_FLOOD)
	41	sparx5_pgid_update_mask(port, PGID_UC_FLOOD, !!(flags.val & BR_FLOOD));
	42	if (flags.mask & BR_BCAST_FLOOD)
	43	sparx5_pgid_update_mask(port, PGID_BCAST, !!(flags.val & BR_BCAST_FLOOD));
d6fce514 SH	44	}
	45
	46	static void sparx5_attr_stp_state_set(struct sparx5_port *port,
	47	u8 state)
	48	{
	49	struct sparx5 *sparx5 = port->sparx5;
	50
	51	if (!test_bit(port->portno, sparx5->bridge_mask)) {
	52	netdev_err(port->ndev,
	53	"Controlling non-bridged port %d?\n", port->portno);
	54	return;
	55	}
	56
	57	switch (state) {
	58	case BR_STATE_FORWARDING:
	59	set_bit(port->portno, sparx5->bridge_fwd_mask);
	60	fallthrough;
	61	case BR_STATE_LEARNING:
	62	set_bit(port->portno, sparx5->bridge_lrn_mask);
	63	break;
	64
	65	default:
	66	/* All other states treated as blocking */
	67	clear_bit(port->portno, sparx5->bridge_fwd_mask);
	68	clear_bit(port->portno, sparx5->bridge_lrn_mask);
	69	break;
	70	}
	71
	72	/* apply the bridge_fwd_mask to all the ports */
	73	sparx5_update_fwd(sparx5);
	74	}
	75
	76	static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
	77	unsigned long ageing_clock_t)
	78	{
	79	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
	80	u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
	81
	82	sparx5_set_ageing(port->sparx5, ageing_time);
	83	}
	84
69bfac96	85	static int sparx5_port_attr_set(struct net_device dev, const void ctx,
d6fce514 SH	86	const struct switchdev_attr *attr,
	87	struct netlink_ext_ack *extack)
	88	{
	89	struct sparx5_port *port = netdev_priv(dev);
	90
	91	switch (attr->id) {
06388a03 CA	92	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
	93	return sparx5_port_attr_pre_bridge_flags(port,
	94	attr->u.brport_flags);
d6fce514 SH	95	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
	96	sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
	97	break;
	98	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
	99	sparx5_attr_stp_state_set(port, attr->u.stp_state);
	100	break;
	101	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
	102	sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
	103	break;
	104	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
e6980b57 CA	105	/* Used PVID 1 when default_pvid is 0, to avoid
	106	* collision with non-bridged ports.
	107	*/
	108	if (port->pvid == 0)
	109	port->pvid = 1;
d6fce514 SH	110	port->vlan_aware = attr->u.vlan_filtering;
	111	sparx5_vlan_port_apply(port->sparx5, port);
	112	break;
	113	default:
	114	return -EOPNOTSUPP;
	115	}
	116
	117	return 0;
	118	}
	119
	120	static int sparx5_port_bridge_join(struct sparx5_port *port,
2f5dc00f VO	121	struct net_device *bridge,
2f5dc00f VO	122	struct netlink_ext_ack *extack)
d6fce514 SH	123	{
d6fce514 SH	124	struct sparx5 *sparx5 = port->sparx5;
2f5dc00f VO	125	struct net_device *ndev = port->ndev;
2f5dc00f VO	126	int err;
d6fce514 SH	127
	128	if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
	129	/* First bridged port */
	130	sparx5->hw_bridge_dev = bridge;
	131	else
	132	if (sparx5->hw_bridge_dev != bridge)
	133	/* This is adding the port to a second bridge, this is
	134	* unsupported
	135	*/
	136	return -ENODEV;
	137
	138	set_bit(port->portno, sparx5->bridge_mask);
	139
4e51bf44	140	err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
47211192	141	false, extack);
2f5dc00f VO	142	if (err)
	143	goto err_switchdev_offload;
	144
e6980b57 CA	145	/* Remove standalone port entry */
	146	sparx5_mact_forget(sparx5, ndev->dev_addr, 0);
	147
d6fce514 SH	148	/* Port enters in bridge mode therefor don't need to copy to CPU
	149	* frames for multicast in case the bridge is not requesting them
	150	*/
2f5dc00f	151	__dev_mc_unsync(ndev, sparx5_mc_unsync);
d6fce514 SH	152
d6fce514 SH	153	return 0;
2f5dc00f VO	154
	155	err_switchdev_offload:
	156	clear_bit(port->portno, sparx5->bridge_mask);
	157	return err;
d6fce514 SH	158	}
	159
	160	static void sparx5_port_bridge_leave(struct sparx5_port *port,
	161	struct net_device *bridge)
	162	{
	163	struct sparx5 *sparx5 = port->sparx5;
	164
4e51bf44	165	switchdev_bridge_port_unoffload(port->ndev, NULL, NULL, NULL);
2f5dc00f	166
d6fce514 SH	167	clear_bit(port->portno, sparx5->bridge_mask);
	168	if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
	169	sparx5->hw_bridge_dev = NULL;
	170
	171	/* Clear bridge vlan settings before updating the port settings */
	172	port->vlan_aware = 0;
	173	port->pvid = NULL_VID;
	174	port->vid = NULL_VID;
	175
e6980b57 CA	176	/* Forward frames to CPU */
	177	sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, 0);
	178
d6fce514 SH	179	/* Port enters in host more therefore restore mc list */
	180	__dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
	181	}
	182
	183	static int sparx5_port_changeupper(struct net_device *dev,
	184	struct netdev_notifier_changeupper_info *info)
	185	{
	186	struct sparx5_port *port = netdev_priv(dev);
2f5dc00f	187	struct netlink_ext_ack *extack;
d6fce514 SH	188	int err = 0;
d6fce514 SH	189
2f5dc00f VO	190	extack = netdev_notifier_info_to_extack(&info->info);
2f5dc00f VO	191
d6fce514 SH	192	if (netif_is_bridge_master(info->upper_dev)) {
d6fce514 SH	193	if (info->linking)
2f5dc00f VO	194	err = sparx5_port_bridge_join(port, info->upper_dev,
2f5dc00f VO	195	extack);
d6fce514 SH	196	else
	197	sparx5_port_bridge_leave(port, info->upper_dev);
	198
	199	sparx5_vlan_port_apply(port->sparx5, port);
	200	}
	201
	202	return err;
	203	}
	204
	205	static int sparx5_port_add_addr(struct net_device *dev, bool up)
	206	{
	207	struct sparx5_port *port = netdev_priv(dev);
	208	struct sparx5 *sparx5 = port->sparx5;
	209	u16 vid = port->pvid;
	210
	211	if (up)
	212	sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
	213	else
	214	sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
	215
	216	return 0;
	217	}
	218
	219	static int sparx5_netdevice_port_event(struct net_device *dev,
	220	struct notifier_block *nb,
	221	unsigned long event, void *ptr)
	222	{
	223	int err = 0;
	224
	225	if (!sparx5_netdevice_check(dev))
	226	return 0;
	227
	228	switch (event) {
	229	case NETDEV_CHANGEUPPER:
	230	err = sparx5_port_changeupper(dev, ptr);
	231	break;
	232	case NETDEV_PRE_UP:
	233	err = sparx5_port_add_addr(dev, true);
	234	break;
	235	case NETDEV_DOWN:
	236	err = sparx5_port_add_addr(dev, false);
	237	break;
	238	}
	239
	240	return err;
	241	}
	242
	243	static int sparx5_netdevice_event(struct notifier_block *nb,
	244	unsigned long event, void *ptr)
	245	{
	246	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	247	int ret = 0;
	248
	249	ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
	250
	251	return notifier_from_errno(ret);
	252	}
	253
	254	static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
	255	{
	256	struct sparx5_switchdev_event_work *switchdev_work =
	257	container_of(work, struct sparx5_switchdev_event_work, work);
	258	struct net_device *dev = switchdev_work->dev;
	259	struct switchdev_notifier_fdb_info *fdb_info;
260	struct sparx5_port *port;
261	struct sparx5 *sparx5;
9f01cfbf	262	bool host_addr;
e6980b57	263	u16 vid;
d6fce514 SH	264
d6fce514 SH	265	rtnl_lock();
9f01cfbf CA	266	if (!sparx5_netdevice_check(dev)) {
	267	host_addr = true;
	268	sparx5 = switchdev_work->sparx5;
	269	} else {
	270	host_addr = false;
	271	sparx5 = switchdev_work->sparx5;
	272	port = netdev_priv(dev);
	273	}
d6fce514 SH	274
	275	fdb_info = &switchdev_work->fdb_info;
	276
e6980b57 CA	277	/* Used PVID 1 when default_pvid is 0, to avoid
	278	* collision with non-bridged ports.
	279	*/
	280	if (fdb_info->vid == 0)
	281	vid = 1;
	282	else
	283	vid = fdb_info->vid;
	284
d6fce514 SH	285	switch (switchdev_work->event) {
d6fce514 SH	286	case SWITCHDEV_FDB_ADD_TO_DEVICE:
9f01cfbf CA	287	if (host_addr)
9f01cfbf CA	288	sparx5_add_mact_entry(sparx5, dev, PGID_CPU,
e6980b57	289	fdb_info->addr, vid);
9f01cfbf CA	290	else
9f01cfbf CA	291	sparx5_add_mact_entry(sparx5, port->ndev, port->portno,
e6980b57	292	fdb_info->addr, vid);
d6fce514 SH	293	break;
d6fce514 SH	294	case SWITCHDEV_FDB_DEL_TO_DEVICE:
e6980b57	295	sparx5_del_mact_entry(sparx5, fdb_info->addr, vid);
d6fce514 SH	296	break;
	297	}
	298
d6fce514 SH	299	rtnl_unlock();
	300	kfree(switchdev_work->fdb_info.addr);
	301	kfree(switchdev_work);
	302	dev_put(dev);
	303	}
	304
	305	static void sparx5_schedule_work(struct work_struct *work)
	306	{
	307	queue_work(sparx5_owq, work);
	308	}
	309
9f01cfbf	310	static int sparx5_switchdev_event(struct notifier_block *nb,
d6fce514 SH	311	unsigned long event, void *ptr)
	312	{
	313	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	314	struct sparx5_switchdev_event_work *switchdev_work;
	315	struct switchdev_notifier_fdb_info *fdb_info;
	316	struct switchdev_notifier_info *info = ptr;
9f01cfbf	317	struct sparx5 *spx5;
d6fce514 SH	318	int err;
d6fce514 SH	319
9f01cfbf CA	320	spx5 = container_of(nb, struct sparx5, switchdev_nb);
9f01cfbf CA	321
d6fce514 SH	322	switch (event) {
	323	case SWITCHDEV_PORT_ATTR_SET:
	324	err = switchdev_handle_port_attr_set(dev, ptr,
	325	sparx5_netdevice_check,
	326	sparx5_port_attr_set);
	327	return notifier_from_errno(err);
	328	case SWITCHDEV_FDB_ADD_TO_DEVICE:
	329	fallthrough;
	330	case SWITCHDEV_FDB_DEL_TO_DEVICE:
	331	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
	332	if (!switchdev_work)
	333	return NOTIFY_BAD;
	334
	335	switchdev_work->dev = dev;
	336	switchdev_work->event = event;
9f01cfbf	337	switchdev_work->sparx5 = spx5;
d6fce514 SH	338
	339	fdb_info = container_of(info,
	340	struct switchdev_notifier_fdb_info,
	341	info);
	342	INIT_WORK(&switchdev_work->work,
	343	sparx5_switchdev_bridge_fdb_event_work);
	344	memcpy(&switchdev_work->fdb_info, ptr,
	345	sizeof(switchdev_work->fdb_info));
	346	switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
	347	if (!switchdev_work->fdb_info.addr)
	348	goto err_addr_alloc;
	349
	350	ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
	351	fdb_info->addr);
	352	dev_hold(dev);
	353
	354	sparx5_schedule_work(&switchdev_work->work);
	355	break;
	356	}
	357
	358	return NOTIFY_DONE;
	359	err_addr_alloc:
	360	kfree(switchdev_work);
	361	return NOTIFY_BAD;
	362	}
	363
d6fce514 SH	364	static int sparx5_handle_port_vlan_add(struct net_device *dev,
	365	struct notifier_block *nb,
	366	const struct switchdev_obj_port_vlan *v)
	367	{
	368	struct sparx5_port *port = netdev_priv(dev);
	369
	370	if (netif_is_bridge_master(dev)) {
318994d3 VO	371	struct sparx5 *sparx5 =
	372	container_of(nb, struct sparx5,
	373	switchdev_blocking_nb);
d6fce514	374
9f01cfbf CA	375	/* Flood broadcast to CPU */
	376	sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
	377	v->vid);
d6fce514 SH	378	return 0;
	379	}
	380
	381	if (!sparx5_netdevice_check(dev))
	382	return -EOPNOTSUPP;
	383
	384	return sparx5_vlan_vid_add(port, v->vid,
	385	v->flags & BRIDGE_VLAN_INFO_PVID,
	386	v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
	387	}
	388
3bacfccd CA	389	static int sparx5_handle_port_mdb_add(struct net_device *dev,
	390	struct notifier_block *nb,
	391	const struct switchdev_obj_port_mdb *v)
	392	{
	393	struct sparx5_port *port = netdev_priv(dev);
	394	struct sparx5 *spx5 = port->sparx5;
	395	u16 pgid_idx, vid;
	396	u32 mact_entry;
	397	int res, err;
	398
1c1ed5a4 CA	399	if (netif_is_bridge_master(v->obj.orig_dev)) {
	400	sparx5_mact_learn(spx5, PGID_CPU, v->addr, v->vid);
	401	return 0;
	402	}
	403
3bacfccd CA	404	/* When VLAN unaware the vlan value is not parsed and we receive vid 0.
	405	* Fall back to bridge vid 1.
	406	*/
	407	if (!br_vlan_enabled(spx5->hw_bridge_dev))
	408	vid = 1;
	409	else
	410	vid = v->vid;
	411
	412	res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
	413
ad238fc6	414	if (res == 0) {
3bacfccd CA	415	pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
3bacfccd CA	416
ad238fc6 CA	417	/* MC_IDX starts after the port masks in the PGID table */
ad238fc6 CA	418	pgid_idx += SPX5_PORTS;
3bacfccd CA	419	sparx5_pgid_update_mask(port, pgid_idx, true);
	420	} else {
	421	err = sparx5_pgid_alloc_mcast(spx5, &pgid_idx);
	422	if (err) {
	423	netdev_warn(dev, "multicast pgid table full\n");
	424	return err;
	425	}
	426	sparx5_pgid_update_mask(port, pgid_idx, true);
	427	err = sparx5_mact_learn(spx5, pgid_idx, v->addr, vid);
	428	if (err) {
	429	netdev_warn(dev, "could not learn mac address %pM\n", v->addr);
	430	sparx5_pgid_update_mask(port, pgid_idx, false);
	431	return err;
	432	}
	433	}
	434
	435	return 0;
	436	}
	437
	438	static int sparx5_mdb_del_entry(struct net_device *dev,
	439	struct sparx5 *spx5,
	440	const unsigned char mac[ETH_ALEN],
	441	const u16 vid,
	442	u16 pgid_idx)
	443	{
	444	int err;
	445
	446	err = sparx5_mact_forget(spx5, mac, vid);
	447	if (err) {
	448	netdev_warn(dev, "could not forget mac address %pM", mac);
	449	return err;
	450	}
	451	err = sparx5_pgid_free(spx5, pgid_idx);
	452	if (err) {
	453	netdev_err(dev, "attempted to free already freed pgid\n");
	454	return err;
	455	}
	456	return 0;
	457	}
	458
	459	static int sparx5_handle_port_mdb_del(struct net_device *dev,
	460	struct notifier_block *nb,
	461	const struct switchdev_obj_port_mdb *v)
	462	{
	463	struct sparx5_port *port = netdev_priv(dev);
	464	struct sparx5 *spx5 = port->sparx5;
	465	u16 pgid_idx, vid;
	466	u32 mact_entry, res, pgid_entry[3];
	467	int err;
	468
1c1ed5a4 CA	469	if (netif_is_bridge_master(v->obj.orig_dev)) {
	470	sparx5_mact_forget(spx5, v->addr, v->vid);
	471	return 0;
	472	}
	473
3bacfccd CA	474	if (!br_vlan_enabled(spx5->hw_bridge_dev))
	475	vid = 1;
	476	else
	477	vid = v->vid;
	478
	479	res = sparx5_mact_find(spx5, v->addr, vid, &mact_entry);
	480
ad238fc6	481	if (res == 0) {
3bacfccd CA	482	pgid_idx = LRN_MAC_ACCESS_CFG_2_MAC_ENTRY_ADDR_GET(mact_entry);
3bacfccd CA	483
ad238fc6 CA	484	/* MC_IDX starts after the port masks in the PGID table */
ad238fc6 CA	485	pgid_idx += SPX5_PORTS;
3bacfccd CA	486	sparx5_pgid_update_mask(port, pgid_idx, false);
3bacfccd CA	487
ad238fc6 CA	488	sparx5_pgid_read_mask(spx5, pgid_idx, pgid_entry);
ad238fc6 CA	489	if (bitmap_empty((unsigned long *)pgid_entry, SPX5_PORTS)) {
3bacfccd CA	490	/* No ports are in MC group. Remove entry */
	491	err = sparx5_mdb_del_entry(dev, spx5, v->addr, vid, pgid_idx);
	492	if (err)
	493	return err;
	494	}
	495	}
	496
	497	return 0;
	498	}
	499
d6fce514 SH	500	static int sparx5_handle_port_obj_add(struct net_device *dev,
	501	struct notifier_block *nb,
	502	struct switchdev_notifier_port_obj_info *info)
	503	{
	504	const struct switchdev_obj *obj = info->obj;
	505	int err;
	506
	507	switch (obj->id) {
	508	case SWITCHDEV_OBJ_ID_PORT_VLAN:
	509	err = sparx5_handle_port_vlan_add(dev, nb,
	510	SWITCHDEV_OBJ_PORT_VLAN(obj));
	511	break;
3bacfccd	512	case SWITCHDEV_OBJ_ID_PORT_MDB:
1c1ed5a4	513	case SWITCHDEV_OBJ_ID_HOST_MDB:
3bacfccd CA	514	err = sparx5_handle_port_mdb_add(dev, nb,
	515	SWITCHDEV_OBJ_PORT_MDB(obj));
	516	break;
d6fce514 SH	517	default:
	518	err = -EOPNOTSUPP;
	519	break;
	520	}
	521
	522	info->handled = true;
	523	return err;
	524	}
	525
	526	static int sparx5_handle_port_vlan_del(struct net_device *dev,
	527	struct notifier_block *nb,
	528	u16 vid)
	529	{
	530	struct sparx5_port *port = netdev_priv(dev);
	531	int ret;
	532
	533	/* Master bridge? */
	534	if (netif_is_bridge_master(dev)) {
	535	struct sparx5 *sparx5 =
	536	container_of(nb, struct sparx5,
	537	switchdev_blocking_nb);
	538
9f01cfbf	539	sparx5_mact_forget(sparx5, dev->broadcast, vid);
d6fce514 SH	540	return 0;
	541	}
	542
	543	if (!sparx5_netdevice_check(dev))
	544	return -EOPNOTSUPP;
	545
	546	ret = sparx5_vlan_vid_del(port, vid);
	547	if (ret)
	548	return ret;
	549
d6fce514 SH	550	return 0;
	551	}
	552
	553	static int sparx5_handle_port_obj_del(struct net_device *dev,
	554	struct notifier_block *nb,
	555	struct switchdev_notifier_port_obj_info *info)
	556	{
	557	const struct switchdev_obj *obj = info->obj;
	558	int err;
	559
	560	switch (obj->id) {
	561	case SWITCHDEV_OBJ_ID_PORT_VLAN:
	562	err = sparx5_handle_port_vlan_del(dev, nb,
	563	SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
	564	break;
3bacfccd	565	case SWITCHDEV_OBJ_ID_PORT_MDB:
1c1ed5a4	566	case SWITCHDEV_OBJ_ID_HOST_MDB:
3bacfccd CA	567	err = sparx5_handle_port_mdb_del(dev, nb,
	568	SWITCHDEV_OBJ_PORT_MDB(obj));
	569	break;
d6fce514 SH	570	default:
	571	err = -EOPNOTSUPP;
	572	break;
	573	}
	574
	575	info->handled = true;
	576	return err;
	577	}
	578
	579	static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
	580	unsigned long event,
	581	void *ptr)
	582	{
	583	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	584	int err;
	585
	586	switch (event) {
	587	case SWITCHDEV_PORT_OBJ_ADD:
	588	err = sparx5_handle_port_obj_add(dev, nb, ptr);
	589	return notifier_from_errno(err);
	590	case SWITCHDEV_PORT_OBJ_DEL:
	591	err = sparx5_handle_port_obj_del(dev, nb, ptr);
	592	return notifier_from_errno(err);
	593	case SWITCHDEV_PORT_ATTR_SET:
	594	err = switchdev_handle_port_attr_set(dev, ptr,
	595	sparx5_netdevice_check,
	596	sparx5_port_attr_set);
	597	return notifier_from_errno(err);
	598	}
	599
	600	return NOTIFY_DONE;
	601	}
	602
	603	int sparx5_register_notifier_blocks(struct sparx5 *s5)
	604	{
	605	int err;
	606
	607	s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
	608	err = register_netdevice_notifier(&s5->netdevice_nb);
	609	if (err)
	610	return err;
	611
	612	s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
	613	err = register_switchdev_notifier(&s5->switchdev_nb);
	614	if (err)
	615	goto err_switchdev_nb;
	616
	617	s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
	618	err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
	619	if (err)
	620	goto err_switchdev_blocking_nb;
	621
	622	sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
83300c69 YY	623	if (!sparx5_owq) {
83300c69 YY	624	err = -ENOMEM;
d6fce514	625	goto err_switchdev_blocking_nb;
83300c69	626	}
d6fce514 SH	627
	628	return 0;
	629
	630	err_switchdev_blocking_nb:
	631	unregister_switchdev_notifier(&s5->switchdev_nb);
	632	err_switchdev_nb:
	633	unregister_netdevice_notifier(&s5->netdevice_nb);
	634
	635	return err;
	636	}
	637
	638	void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
	639	{
	640	destroy_workqueue(sparx5_owq);
	641
	642	unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
	643	unregister_switchdev_notifier(&s5->switchdev_nb);
	644	unregister_netdevice_notifier(&s5->netdevice_nb);
	645	}