drivers/net/ethernet/ti/am65-cpsw-switchdev.c - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 /* Texas Instruments K3 AM65 Ethernet Switchdev Driver
  *
  * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
  *
  */

 #include <linux/etherdevice.h>
 #include <linux/if_bridge.h>
 #include <linux/netdevice.h>
 #include <linux/workqueue.h>
 #include <net/switchdev.h>

 #include "am65-cpsw-nuss.h"
 #include "am65-cpsw-switchdev.h"
 #include "cpsw_ale.h"

 struct am65_cpsw_switchdev_event_work {
 	struct work_struct work;
 	struct switchdev_notifier_fdb_info fdb_info;
 	struct am65_cpsw_port *port;
 	unsigned long event;
 };

 static int am65_cpsw_port_stp_state_set(struct am65_cpsw_port *port, u8 state)
 {
 	struct am65_cpsw_common *cpsw = port->common;
 	u8 cpsw_state;
 	int ret = 0;

 	switch (state) {
 	case BR_STATE_FORWARDING:
 		cpsw_state = ALE_PORT_STATE_FORWARD;
 		break;
 	case BR_STATE_LEARNING:
 		cpsw_state = ALE_PORT_STATE_LEARN;
 		break;
 	case BR_STATE_DISABLED:
 		cpsw_state = ALE_PORT_STATE_DISABLE;
 		break;
 	case BR_STATE_LISTENING:
 	case BR_STATE_BLOCKING:
 		cpsw_state = ALE_PORT_STATE_BLOCK;
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}

 	ret = cpsw_ale_control_set(cpsw->ale, port->port_id,
 				   ALE_PORT_STATE, cpsw_state);
 	netdev_dbg(port->ndev, "ale state: %u\n", cpsw_state);

 	return ret;
 }

 static int am65_cpsw_port_attr_br_flags_set(struct am65_cpsw_port *port,
 					    struct net_device *orig_dev,
 					    struct switchdev_brport_flags flags)
 {
 	struct am65_cpsw_common *cpsw = port->common;

 	if (flags.mask & BR_MCAST_FLOOD) {
 		bool unreg_mcast_add = false;

 		if (flags.val & BR_MCAST_FLOOD)
 			unreg_mcast_add = true;

 		netdev_dbg(port->ndev, "BR_MCAST_FLOOD: %d port %u\n",
 			   unreg_mcast_add, port->port_id);

 		cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(port->port_id),
 					 unreg_mcast_add);
 	}

 	return 0;
 }

 static int am65_cpsw_port_attr_br_flags_pre_set(struct net_device *netdev,
 						struct switchdev_brport_flags flags)
 {
 	if (flags.mask & ~(BR_LEARNING | BR_MCAST_FLOOD))
 		return -EINVAL;

 	return 0;
 }

 static int am65_cpsw_port_attr_set(struct net_device *ndev, const void *ctx,
 				   const struct switchdev_attr *attr,
 				   struct netlink_ext_ack *extack)
 {
 	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 	int ret;

 	netdev_dbg(ndev, "attr: id %u port: %u\n", attr->id, port->port_id);

 	switch (attr->id) {
 	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
 		ret = am65_cpsw_port_attr_br_flags_pre_set(ndev,
 							   attr->u.brport_flags);
 		break;
 	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
 		ret = am65_cpsw_port_stp_state_set(port, attr->u.stp_state);
 		netdev_dbg(ndev, "stp state: %u\n", attr->u.stp_state);
 		break;
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
 		ret = am65_cpsw_port_attr_br_flags_set(port, attr->orig_dev,
 						       attr->u.brport_flags);
 		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;
 	}

 	return ret;
 }

 static u16 am65_cpsw_get_pvid(struct am65_cpsw_port *port)
 {
 	struct am65_cpsw_common *cpsw = port->common;
 	struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
 	u32 pvid;

 	if (port->port_id)
 		pvid = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 	else
 		pvid = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);

 	pvid = pvid & 0xfff;

 	return pvid;
 }

 static void am65_cpsw_set_pvid(struct am65_cpsw_port *port, u16 vid, bool cfi, u32 cos)
 {
 	struct am65_cpsw_common *cpsw = port->common;
 	struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
 	u32 pvid;

 	pvid = vid;
 	pvid |= cfi ? BIT(12) : 0;
 	pvid |= (cos & 0x7) << 13;

 	if (port->port_id)
 		writel(pvid, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 	else
 		writel(pvid, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 }

 static int am65_cpsw_port_vlan_add(struct am65_cpsw_port *port, bool untag, bool pvid,
 				   u16 vid, struct net_device *orig_dev)
 {
 	bool cpu_port = netif_is_bridge_master(orig_dev);
 	struct am65_cpsw_common *cpsw = port->common;
 	int unreg_mcast_mask = 0;
 	int reg_mcast_mask = 0;
 	int untag_mask = 0;
 	int port_mask;
 	int ret = 0;
 	u32 flags;

 	if (cpu_port) {
 		port_mask = BIT(HOST_PORT_NUM);
 		flags = orig_dev->flags;
 		unreg_mcast_mask = port_mask;
 	} else {
 		port_mask = BIT(port->port_id);
 		flags = port->ndev->flags;
 	}

 	if (flags & IFF_MULTICAST)
 		reg_mcast_mask = port_mask;

 	if (untag)
 		untag_mask = port_mask;

 	ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
 				       reg_mcast_mask, unreg_mcast_mask);
 	if (ret) {
 		netdev_err(port->ndev, "Unable to add vlan\n");
 		return ret;
 	}

 	if (cpu_port)
 		cpsw_ale_add_ucast(cpsw->ale, port->slave.mac_addr,
 				   HOST_PORT_NUM, ALE_VLAN | ALE_SECURE, vid);
 	if (!pvid)
 		return ret;

 	am65_cpsw_set_pvid(port, vid, 0, 0);

 	netdev_dbg(port->ndev, "VID add: %s: vid:%u ports:%X\n",
 		   port->ndev->name, vid, port_mask);

 	return ret;
 }

 static int am65_cpsw_port_vlan_del(struct am65_cpsw_port *port, u16 vid,
 				   struct net_device *orig_dev)
 {
 	bool cpu_port = netif_is_bridge_master(orig_dev);
 	struct am65_cpsw_common *cpsw = port->common;
 	int port_mask;
 	int ret = 0;

 	if (cpu_port)
 		port_mask = BIT(HOST_PORT_NUM);
 	else
 		port_mask = BIT(port->port_id);

 	ret = cpsw_ale_del_vlan(cpsw->ale, vid, port_mask);
 	if (ret != 0)
 		return ret;

 	/* We don't care for the return value here, error is returned only if
 	 * the unicast entry is not present
 	 */
 	if (cpu_port)
 		cpsw_ale_del_ucast(cpsw->ale, port->slave.mac_addr,
 				   HOST_PORT_NUM, ALE_VLAN, vid);

 	if (vid == am65_cpsw_get_pvid(port))
 		am65_cpsw_set_pvid(port, 0, 0, 0);

 	/* We don't care for the return value here, error is returned only if
 	 * the multicast entry is not present
 	 */
 	cpsw_ale_del_mcast(cpsw->ale, port->ndev->broadcast, port_mask,
 			   ALE_VLAN, vid);
 	netdev_dbg(port->ndev, "VID del: %s: vid:%u ports:%X\n",
 		   port->ndev->name, vid, port_mask);

 	return ret;
 }

 static int am65_cpsw_port_vlans_add(struct am65_cpsw_port *port,
 				    const struct switchdev_obj_port_vlan *vlan)
 {
 	bool untag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
 	struct net_device *orig_dev = vlan->obj.orig_dev;
 	bool cpu_port = netif_is_bridge_master(orig_dev);
 	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;

 	netdev_dbg(port->ndev, "VID add: %s: vid:%u flags:%X\n",
 		   port->ndev->name, vlan->vid, vlan->flags);

 	if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
 		return 0;

 	return am65_cpsw_port_vlan_add(port, untag, pvid, vlan->vid, orig_dev);
 }

 static int am65_cpsw_port_vlans_del(struct am65_cpsw_port *port,
 				    const struct switchdev_obj_port_vlan *vlan)

 {
 	return am65_cpsw_port_vlan_del(port, vlan->vid, vlan->obj.orig_dev);
 }

 static int am65_cpsw_port_mdb_add(struct am65_cpsw_port *port,
 				  struct switchdev_obj_port_mdb *mdb)

 {
 	struct net_device *orig_dev = mdb->obj.orig_dev;
 	bool cpu_port = netif_is_bridge_master(orig_dev);
 	struct am65_cpsw_common *cpsw = port->common;
 	int port_mask;
 	int err;

 	if (cpu_port)
 		port_mask = BIT(HOST_PORT_NUM);
 	else
 		port_mask = BIT(port->port_id);

 	err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask,
 				 ALE_VLAN, mdb->vid, 0);
 	netdev_dbg(port->ndev, "MDB add: %s: vid %u:%pM  ports: %X\n",
 		   port->ndev->name, mdb->vid, mdb->addr, port_mask);

 	return err;
 }

 static int am65_cpsw_port_mdb_del(struct am65_cpsw_port *port,
 				  struct switchdev_obj_port_mdb *mdb)

 {
 	struct net_device *orig_dev = mdb->obj.orig_dev;
 	bool cpu_port = netif_is_bridge_master(orig_dev);
 	struct am65_cpsw_common *cpsw = port->common;
 	int del_mask;

 	if (cpu_port)
 		del_mask = BIT(HOST_PORT_NUM);
 	else
 		del_mask = BIT(port->port_id);

 	/* Ignore error as error code is returned only when entry is already removed */
 	cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask,
 			   ALE_VLAN, mdb->vid);
 	netdev_dbg(port->ndev, "MDB del: %s: vid %u:%pM  ports: %X\n",
 		   port->ndev->name, mdb->vid, mdb->addr, del_mask);

 	return 0;
 }

 static int am65_cpsw_port_obj_add(struct net_device *ndev, const void *ctx,
 				  const struct switchdev_obj *obj,
 				  struct netlink_ext_ack *extack)
 {
 	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
 	struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
 	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 	int err = 0;

 	netdev_dbg(ndev, "obj_add: id %u port: %u\n", obj->id, port->port_id);

 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = am65_cpsw_port_vlans_add(port, vlan);
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 	case SWITCHDEV_OBJ_ID_HOST_MDB:
 		err = am65_cpsw_port_mdb_add(port, mdb);
 		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;
 	}

 	return err;
 }

 static int am65_cpsw_port_obj_del(struct net_device *ndev, const void *ctx,
 				  const struct switchdev_obj *obj)
 {
 	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
 	struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
 	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 	int err = 0;

 	netdev_dbg(ndev, "obj_del: id %u port: %u\n", obj->id, port->port_id);

 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = am65_cpsw_port_vlans_del(port, vlan);
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 	case SWITCHDEV_OBJ_ID_HOST_MDB:
 		err = am65_cpsw_port_mdb_del(port, mdb);
 		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;
 	}

 	return err;
 }

 static void am65_cpsw_fdb_offload_notify(struct net_device *ndev,
 					 struct switchdev_notifier_fdb_info *rcv)
 {
 	struct switchdev_notifier_fdb_info info = {};

 	info.addr = rcv->addr;
 	info.vid = rcv->vid;
 	info.offloaded = true;
 	call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
 				 ndev, &info.info, NULL);
 }

 static void am65_cpsw_switchdev_event_work(struct work_struct *work)
 {
 	struct am65_cpsw_switchdev_event_work *switchdev_work =
 		container_of(work, struct am65_cpsw_switchdev_event_work, work);
 	struct am65_cpsw_port *port = switchdev_work->port;
 	struct switchdev_notifier_fdb_info *fdb;
 	struct am65_cpsw_common *cpsw = port->common;
 	int port_id = port->port_id;

 	rtnl_lock();
 	switch (switchdev_work->event) {
 	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 		fdb = &switchdev_work->fdb_info;

 		netdev_dbg(port->ndev, "cpsw_fdb_add: MACID = %pM vid = %u flags = %u %u -- port %d\n",
 			   fdb->addr, fdb->vid, fdb->added_by_user,
 			   fdb->offloaded, port_id);

 		if (!fdb->added_by_user || fdb->is_local)
 			break;
 		if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
 			port_id = HOST_PORT_NUM;

 		cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
 				   fdb->vid ? ALE_VLAN : 0, fdb->vid);
 		am65_cpsw_fdb_offload_notify(port->ndev, fdb);
 		break;
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		fdb = &switchdev_work->fdb_info;

 		netdev_dbg(port->ndev, "cpsw_fdb_del: MACID = %pM vid = %u flags = %u %u -- port %d\n",
 			   fdb->addr, fdb->vid, fdb->added_by_user,
 			   fdb->offloaded, port_id);

 		if (!fdb->added_by_user || fdb->is_local)
 			break;
 		if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
 			port_id = HOST_PORT_NUM;

 		cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
 				   fdb->vid ? ALE_VLAN : 0, fdb->vid);
 		break;
 	default:
 		break;
 	}
 	rtnl_unlock();

 	kfree(switchdev_work->fdb_info.addr);
 	kfree(switchdev_work);
 	dev_put(port->ndev);
 }

 /* called under rcu_read_lock() */
 static int am65_cpsw_switchdev_event(struct notifier_block *unused,
 				     unsigned long event, void *ptr)
 {
 	struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
 	struct am65_cpsw_switchdev_event_work *switchdev_work;
 	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 	struct switchdev_notifier_fdb_info *fdb_info = ptr;
 	int err;

 	if (event == SWITCHDEV_PORT_ATTR_SET) {
 		err = switchdev_handle_port_attr_set(ndev, ptr,
 						     am65_cpsw_port_dev_check,
 						     am65_cpsw_port_attr_set);
 		return notifier_from_errno(err);
 	}

 	if (!am65_cpsw_port_dev_check(ndev))
 		return NOTIFY_DONE;

 	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
 	if (WARN_ON(!switchdev_work))
 		return NOTIFY_BAD;

 	INIT_WORK(&switchdev_work->work, am65_cpsw_switchdev_event_work);
 	switchdev_work->port = port;
 	switchdev_work->event = event;

 	switch (event) {
 	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		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(ndev);
 		break;
 	default:
 		kfree(switchdev_work);
 		return NOTIFY_DONE;
 	}

 	queue_work(system_long_wq, &switchdev_work->work);

 	return NOTIFY_DONE;

 err_addr_alloc:
 	kfree(switchdev_work);
 	return NOTIFY_BAD;
 }

 static struct notifier_block cpsw_switchdev_notifier = {
 	.notifier_call = am65_cpsw_switchdev_event,
 };

 static int am65_cpsw_switchdev_blocking_event(struct notifier_block *unused,
 					      unsigned long event, void *ptr)
 {
 	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
 	int err;

 	switch (event) {
 	case SWITCHDEV_PORT_OBJ_ADD:
 		err = switchdev_handle_port_obj_add(dev, ptr,
 						    am65_cpsw_port_dev_check,
 						    am65_cpsw_port_obj_add);
 		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_OBJ_DEL:
 		err = switchdev_handle_port_obj_del(dev, ptr,
 						    am65_cpsw_port_dev_check,
 						    am65_cpsw_port_obj_del);
 		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_ATTR_SET:
 		err = switchdev_handle_port_attr_set(dev, ptr,
 						     am65_cpsw_port_dev_check,
 						     am65_cpsw_port_attr_set);
 		return notifier_from_errno(err);
 	default:
 		break;
 	}

 	return NOTIFY_DONE;
 }

 static struct notifier_block cpsw_switchdev_bl_notifier = {
 	.notifier_call = am65_cpsw_switchdev_blocking_event,
 };

 int am65_cpsw_switchdev_register_notifiers(struct am65_cpsw_common *cpsw)
 {
 	int ret = 0;

 	ret = register_switchdev_notifier(&cpsw_switchdev_notifier);
 	if (ret) {
 		dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n",
 			ret);
 		return ret;
 	}

 	ret = register_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
 	if (ret) {
 		dev_err(cpsw->dev, "register switchdev blocking notifier ret:%d\n",
 			ret);
 		unregister_switchdev_notifier(&cpsw_switchdev_notifier);
 	}

 	return ret;
 }

 void am65_cpsw_switchdev_unregister_notifiers(struct am65_cpsw_common *cpsw)
 {
 	unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
 	unregister_switchdev_notifier(&cpsw_switchdev_notifier);
 }
	/* SPDX-License-Identifier: GPL-2.0 */
	/* Texas Instruments K3 AM65 Ethernet Switchdev Driver
	*
	* Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
	*
	*/

	#include <linux/etherdevice.h>
	#include <linux/if_bridge.h>
	#include <linux/netdevice.h>
	#include <linux/workqueue.h>
	#include <net/switchdev.h>

	#include "am65-cpsw-nuss.h"
	#include "am65-cpsw-switchdev.h"
	#include "cpsw_ale.h"

	struct am65_cpsw_switchdev_event_work {
	struct work_struct work;
	struct switchdev_notifier_fdb_info fdb_info;
	struct am65_cpsw_port *port;
	unsigned long event;
	};

	static int am65_cpsw_port_stp_state_set(struct am65_cpsw_port *port, u8 state)
	{
	struct am65_cpsw_common *cpsw = port->common;
	u8 cpsw_state;
	int ret = 0;

	switch (state) {
	case BR_STATE_FORWARDING:
	cpsw_state = ALE_PORT_STATE_FORWARD;
	break;
	case BR_STATE_LEARNING:
	cpsw_state = ALE_PORT_STATE_LEARN;
	break;
	case BR_STATE_DISABLED:
	cpsw_state = ALE_PORT_STATE_DISABLE;
	break;
	case BR_STATE_LISTENING:
	case BR_STATE_BLOCKING:
	cpsw_state = ALE_PORT_STATE_BLOCK;
	break;
	default:
	return -EOPNOTSUPP;
	}

	ret = cpsw_ale_control_set(cpsw->ale, port->port_id,
	ALE_PORT_STATE, cpsw_state);
	netdev_dbg(port->ndev, "ale state: %u\n", cpsw_state);

	return ret;
	}

	static int am65_cpsw_port_attr_br_flags_set(struct am65_cpsw_port *port,
	struct net_device *orig_dev,
	struct switchdev_brport_flags flags)
	{
	struct am65_cpsw_common *cpsw = port->common;

	if (flags.mask & BR_MCAST_FLOOD) {
	bool unreg_mcast_add = false;

	if (flags.val & BR_MCAST_FLOOD)
	unreg_mcast_add = true;

	netdev_dbg(port->ndev, "BR_MCAST_FLOOD: %d port %u\n",
	unreg_mcast_add, port->port_id);

	cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(port->port_id),
	unreg_mcast_add);
	}

	return 0;
	}

	static int am65_cpsw_port_attr_br_flags_pre_set(struct net_device *netdev,
	struct switchdev_brport_flags flags)
	{
	if (flags.mask & ~(BR_LEARNING \| BR_MCAST_FLOOD))
	return -EINVAL;

	return 0;
	}

	static int am65_cpsw_port_attr_set(struct net_device ndev, const void ctx,
	const struct switchdev_attr *attr,
	struct netlink_ext_ack *extack)
	{
	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
	int ret;

	netdev_dbg(ndev, "attr: id %u port: %u\n", attr->id, port->port_id);

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
	ret = am65_cpsw_port_attr_br_flags_pre_set(ndev,
	attr->u.brport_flags);
	break;
	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
	ret = am65_cpsw_port_stp_state_set(port, attr->u.stp_state);
	netdev_dbg(ndev, "stp state: %u\n", attr->u.stp_state);
	break;
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
	ret = am65_cpsw_port_attr_br_flags_set(port, attr->orig_dev,
	attr->u.brport_flags);
	break;
	default:
	ret = -EOPNOTSUPP;
	break;
	}

	return ret;
	}

	static u16 am65_cpsw_get_pvid(struct am65_cpsw_port *port)
	{
	struct am65_cpsw_common *cpsw = port->common;
	struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
	u32 pvid;

	if (port->port_id)
	pvid = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
	else
	pvid = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);

	pvid = pvid & 0xfff;

	return pvid;
	}

	static void am65_cpsw_set_pvid(struct am65_cpsw_port *port, u16 vid, bool cfi, u32 cos)
	{
	struct am65_cpsw_common *cpsw = port->common;
	struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
	u32 pvid;

	pvid = vid;
	pvid \|= cfi ? BIT(12) : 0;
	pvid \|= (cos & 0x7) << 13;

	if (port->port_id)
	writel(pvid, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
	else
	writel(pvid, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
	}

	static int am65_cpsw_port_vlan_add(struct am65_cpsw_port *port, bool untag, bool pvid,
	u16 vid, struct net_device *orig_dev)
	{
	bool cpu_port = netif_is_bridge_master(orig_dev);
	struct am65_cpsw_common *cpsw = port->common;
	int unreg_mcast_mask = 0;
	int reg_mcast_mask = 0;
	int untag_mask = 0;
	int port_mask;
	int ret = 0;
	u32 flags;

	if (cpu_port) {
	port_mask = BIT(HOST_PORT_NUM);
	flags = orig_dev->flags;
	unreg_mcast_mask = port_mask;
	} else {
	port_mask = BIT(port->port_id);
	flags = port->ndev->flags;
	}

	if (flags & IFF_MULTICAST)
	reg_mcast_mask = port_mask;

	if (untag)
	untag_mask = port_mask;

	ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
	reg_mcast_mask, unreg_mcast_mask);
	if (ret) {
	netdev_err(port->ndev, "Unable to add vlan\n");
	return ret;
	}

	if (cpu_port)
	cpsw_ale_add_ucast(cpsw->ale, port->slave.mac_addr,
	HOST_PORT_NUM, ALE_VLAN \| ALE_SECURE, vid);
	if (!pvid)
	return ret;

	am65_cpsw_set_pvid(port, vid, 0, 0);

	netdev_dbg(port->ndev, "VID add: %s: vid:%u ports:%X\n",
	port->ndev->name, vid, port_mask);

	return ret;
	}

	static int am65_cpsw_port_vlan_del(struct am65_cpsw_port *port, u16 vid,
	struct net_device *orig_dev)
	{
	bool cpu_port = netif_is_bridge_master(orig_dev);
	struct am65_cpsw_common *cpsw = port->common;
	int port_mask;
	int ret = 0;

	if (cpu_port)
	port_mask = BIT(HOST_PORT_NUM);
	else
	port_mask = BIT(port->port_id);

	ret = cpsw_ale_del_vlan(cpsw->ale, vid, port_mask);
	if (ret != 0)
	return ret;

	/* We don't care for the return value here, error is returned only if
	* the unicast entry is not present
	*/
	if (cpu_port)
	cpsw_ale_del_ucast(cpsw->ale, port->slave.mac_addr,
	HOST_PORT_NUM, ALE_VLAN, vid);

	if (vid == am65_cpsw_get_pvid(port))
	am65_cpsw_set_pvid(port, 0, 0, 0);

	/* We don't care for the return value here, error is returned only if
	* the multicast entry is not present
	*/
	cpsw_ale_del_mcast(cpsw->ale, port->ndev->broadcast, port_mask,
	ALE_VLAN, vid);
	netdev_dbg(port->ndev, "VID del: %s: vid:%u ports:%X\n",
	port->ndev->name, vid, port_mask);

	return ret;
	}

	static int am65_cpsw_port_vlans_add(struct am65_cpsw_port *port,
	const struct switchdev_obj_port_vlan *vlan)
	{
	bool untag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	struct net_device *orig_dev = vlan->obj.orig_dev;
	bool cpu_port = netif_is_bridge_master(orig_dev);
	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;

	netdev_dbg(port->ndev, "VID add: %s: vid:%u flags:%X\n",
	port->ndev->name, vlan->vid, vlan->flags);

	if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
	return 0;

	return am65_cpsw_port_vlan_add(port, untag, pvid, vlan->vid, orig_dev);
	}

	static int am65_cpsw_port_vlans_del(struct am65_cpsw_port *port,
	const struct switchdev_obj_port_vlan *vlan)

	{
	return am65_cpsw_port_vlan_del(port, vlan->vid, vlan->obj.orig_dev);
	}

	static int am65_cpsw_port_mdb_add(struct am65_cpsw_port *port,
	struct switchdev_obj_port_mdb *mdb)

	{
	struct net_device *orig_dev = mdb->obj.orig_dev;
	bool cpu_port = netif_is_bridge_master(orig_dev);
	struct am65_cpsw_common *cpsw = port->common;
	int port_mask;
	int err;

	if (cpu_port)
	port_mask = BIT(HOST_PORT_NUM);
	else
	port_mask = BIT(port->port_id);

	err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask,
	ALE_VLAN, mdb->vid, 0);
	netdev_dbg(port->ndev, "MDB add: %s: vid %u:%pM ports: %X\n",
	port->ndev->name, mdb->vid, mdb->addr, port_mask);

	return err;
	}

	static int am65_cpsw_port_mdb_del(struct am65_cpsw_port *port,
	struct switchdev_obj_port_mdb *mdb)

	{
	struct net_device *orig_dev = mdb->obj.orig_dev;
	bool cpu_port = netif_is_bridge_master(orig_dev);
	struct am65_cpsw_common *cpsw = port->common;
	int del_mask;

	if (cpu_port)
	del_mask = BIT(HOST_PORT_NUM);
	else
	del_mask = BIT(port->port_id);

	/* Ignore error as error code is returned only when entry is already removed */
	cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask,
	ALE_VLAN, mdb->vid);
	netdev_dbg(port->ndev, "MDB del: %s: vid %u:%pM ports: %X\n",
	port->ndev->name, mdb->vid, mdb->addr, del_mask);

	return 0;
	}

	static int am65_cpsw_port_obj_add(struct net_device ndev, const void ctx,
	const struct switchdev_obj *obj,
	struct netlink_ext_ack *extack)
	{
	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
	struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
	int err = 0;

	netdev_dbg(ndev, "obj_add: id %u port: %u\n", obj->id, port->port_id);

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
	err = am65_cpsw_port_vlans_add(port, vlan);
	break;
	case SWITCHDEV_OBJ_ID_PORT_MDB:
	case SWITCHDEV_OBJ_ID_HOST_MDB:
	err = am65_cpsw_port_mdb_add(port, mdb);
	break;
	default:
	err = -EOPNOTSUPP;
	break;
	}

	return err;
	}

	static int am65_cpsw_port_obj_del(struct net_device ndev, const void ctx,
	const struct switchdev_obj *obj)
	{
	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
	struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
	int err = 0;

	netdev_dbg(ndev, "obj_del: id %u port: %u\n", obj->id, port->port_id);

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
	err = am65_cpsw_port_vlans_del(port, vlan);
	break;
	case SWITCHDEV_OBJ_ID_PORT_MDB:
	case SWITCHDEV_OBJ_ID_HOST_MDB:
	err = am65_cpsw_port_mdb_del(port, mdb);
	break;
	default:
	err = -EOPNOTSUPP;
	break;
	}

	return err;
	}

	static void am65_cpsw_fdb_offload_notify(struct net_device *ndev,
	struct switchdev_notifier_fdb_info *rcv)
	{
	struct switchdev_notifier_fdb_info info = {};

	info.addr = rcv->addr;
	info.vid = rcv->vid;
	info.offloaded = true;
	call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
	ndev, &info.info, NULL);
	}

	static void am65_cpsw_switchdev_event_work(struct work_struct *work)
	{
	struct am65_cpsw_switchdev_event_work *switchdev_work =
	container_of(work, struct am65_cpsw_switchdev_event_work, work);
	struct am65_cpsw_port *port = switchdev_work->port;
	struct switchdev_notifier_fdb_info *fdb;
	struct am65_cpsw_common *cpsw = port->common;
	int port_id = port->port_id;

	rtnl_lock();
	switch (switchdev_work->event) {
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
	fdb = &switchdev_work->fdb_info;

	netdev_dbg(port->ndev, "cpsw_fdb_add: MACID = %pM vid = %u flags = %u %u -- port %d\n",
	fdb->addr, fdb->vid, fdb->added_by_user,
	fdb->offloaded, port_id);

	if (!fdb->added_by_user \|\| fdb->is_local)
	break;
	if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
	port_id = HOST_PORT_NUM;

	cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
	fdb->vid ? ALE_VLAN : 0, fdb->vid);
	am65_cpsw_fdb_offload_notify(port->ndev, fdb);
	break;
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
	fdb = &switchdev_work->fdb_info;

	netdev_dbg(port->ndev, "cpsw_fdb_del: MACID = %pM vid = %u flags = %u %u -- port %d\n",
	fdb->addr, fdb->vid, fdb->added_by_user,
	fdb->offloaded, port_id);

	if (!fdb->added_by_user \|\| fdb->is_local)
	break;
	if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
	port_id = HOST_PORT_NUM;

	cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
	fdb->vid ? ALE_VLAN : 0, fdb->vid);
	break;
	default:
	break;
	}
	rtnl_unlock();

	kfree(switchdev_work->fdb_info.addr);
	kfree(switchdev_work);
	dev_put(port->ndev);
	}

	/* called under rcu_read_lock() */
	static int am65_cpsw_switchdev_event(struct notifier_block *unused,
	unsigned long event, void *ptr)
	{
	struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
	struct am65_cpsw_switchdev_event_work *switchdev_work;
	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
	struct switchdev_notifier_fdb_info *fdb_info = ptr;
	int err;

	if (event == SWITCHDEV_PORT_ATTR_SET) {
	err = switchdev_handle_port_attr_set(ndev, ptr,
	am65_cpsw_port_dev_check,
	am65_cpsw_port_attr_set);
	return notifier_from_errno(err);
	}

	if (!am65_cpsw_port_dev_check(ndev))
	return NOTIFY_DONE;

	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
	if (WARN_ON(!switchdev_work))
	return NOTIFY_BAD;

	INIT_WORK(&switchdev_work->work, am65_cpsw_switchdev_event_work);
	switchdev_work->port = port;
	switchdev_work->event = event;

	switch (event) {
	case SWITCHDEV_FDB_ADD_TO_DEVICE:
	case SWITCHDEV_FDB_DEL_TO_DEVICE:
	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(ndev);
	break;
	default:
	kfree(switchdev_work);
	return NOTIFY_DONE;
	}

	queue_work(system_long_wq, &switchdev_work->work);

	return NOTIFY_DONE;

	err_addr_alloc:
	kfree(switchdev_work);
	return NOTIFY_BAD;
	}

	static struct notifier_block cpsw_switchdev_notifier = {
	.notifier_call = am65_cpsw_switchdev_event,
	};

	static int am65_cpsw_switchdev_blocking_event(struct notifier_block *unused,
	unsigned long event, void *ptr)
	{
	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	int err;

	switch (event) {
	case SWITCHDEV_PORT_OBJ_ADD:
	err = switchdev_handle_port_obj_add(dev, ptr,
	am65_cpsw_port_dev_check,
	am65_cpsw_port_obj_add);
	return notifier_from_errno(err);
	case SWITCHDEV_PORT_OBJ_DEL:
	err = switchdev_handle_port_obj_del(dev, ptr,
	am65_cpsw_port_dev_check,
	am65_cpsw_port_obj_del);
	return notifier_from_errno(err);
	case SWITCHDEV_PORT_ATTR_SET:
	err = switchdev_handle_port_attr_set(dev, ptr,
	am65_cpsw_port_dev_check,
	am65_cpsw_port_attr_set);
	return notifier_from_errno(err);
	default:
	break;
	}

	return NOTIFY_DONE;
	}

	static struct notifier_block cpsw_switchdev_bl_notifier = {
	.notifier_call = am65_cpsw_switchdev_blocking_event,
	};

	int am65_cpsw_switchdev_register_notifiers(struct am65_cpsw_common *cpsw)
	{
	int ret = 0;

	ret = register_switchdev_notifier(&cpsw_switchdev_notifier);
	if (ret) {
	dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n",
	ret);
	return ret;
	}

	ret = register_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
	if (ret) {
	dev_err(cpsw->dev, "register switchdev blocking notifier ret:%d\n",
	ret);
	unregister_switchdev_notifier(&cpsw_switchdev_notifier);
	}

	return ret;
	}

	void am65_cpsw_switchdev_unregister_notifiers(struct am65_cpsw_common *cpsw)
	{
	unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
	unregister_switchdev_notifier(&cpsw_switchdev_notifier);
	}