spectrum_switchdev.c

/*
 * drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
 * Copyright (c) 2015 Elad Raz <eladr@mellanox.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <net/switchdev.h>

#include "spectrum.h"
#include "core.h"
#include "reg.h"

static struct mlxsw_sp_port *
mlxsw_sp_port_orig_get(struct net_device *dev,
		       struct mlxsw_sp_port *mlxsw_sp_port)
{
	struct mlxsw_sp_port *mlxsw_sp_vport;
	u16 vid;

	if (!is_vlan_dev(dev))
		return mlxsw_sp_port;

	vid = vlan_dev_vlan_id(dev);
	mlxsw_sp_vport = mlxsw_sp_port_vport_find(mlxsw_sp_port, vid);
	WARN_ON(!mlxsw_sp_vport);

	return mlxsw_sp_vport;
}

static int mlxsw_sp_port_attr_get(struct net_device *dev,
				  struct switchdev_attr *attr)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

	mlxsw_sp_port = mlxsw_sp_port_orig_get(attr->orig_dev, mlxsw_sp_port);
	if (!mlxsw_sp_port)
		return -EINVAL;

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
		attr->u.ppid.id_len = sizeof(mlxsw_sp->base_mac);
		memcpy(&attr->u.ppid.id, &mlxsw_sp->base_mac,
		       attr->u.ppid.id_len);
		break;
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
		attr->u.brport_flags =
			(mlxsw_sp_port->learning ? BR_LEARNING : 0) |
			(mlxsw_sp_port->learning_sync ? BR_LEARNING_SYNC : 0) |
			(mlxsw_sp_port->uc_flood ? BR_FLOOD : 0);
		break;
	default:
		return -EOPNOTSUPP;
	}

	return 0;
}

static int mlxsw_sp_port_stp_state_set(struct mlxsw_sp_port *mlxsw_sp_port,
				       u8 state)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	enum mlxsw_reg_spms_state spms_state;
	char *spms_pl;
	u16 vid;
	int err;

	switch (state) {
	case BR_STATE_DISABLED: /* fall-through */
	case BR_STATE_FORWARDING:
		spms_state = MLXSW_REG_SPMS_STATE_FORWARDING;
		break;
	case BR_STATE_LISTENING: /* fall-through */
	case BR_STATE_LEARNING:
		spms_state = MLXSW_REG_SPMS_STATE_LEARNING;
		break;
	case BR_STATE_BLOCKING:
		spms_state = MLXSW_REG_SPMS_STATE_DISCARDING;
		break;
	default:
		BUG();
	}

	spms_pl = kmalloc(MLXSW_REG_SPMS_LEN, GFP_KERNEL);
	if (!spms_pl)
		return -ENOMEM;
	mlxsw_reg_spms_pack(spms_pl, mlxsw_sp_port->local_port);

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		vid = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
		mlxsw_reg_spms_vid_pack(spms_pl, vid, spms_state);
	} else {
		for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID)
			mlxsw_reg_spms_vid_pack(spms_pl, vid, spms_state);
	}

	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spms), spms_pl);
	kfree(spms_pl);
	return err;
}

static int mlxsw_sp_port_attr_stp_state_set(struct mlxsw_sp_port *mlxsw_sp_port,
					    struct switchdev_trans *trans,
					    u8 state)
{
	if (switchdev_trans_ph_prepare(trans))
		return 0;

	mlxsw_sp_port->stp_state = state;
	return mlxsw_sp_port_stp_state_set(mlxsw_sp_port, state);
}

static int __mlxsw_sp_port_flood_set(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 idx_begin, u16 idx_end, bool set,
				     bool only_uc)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	u16 local_port = mlxsw_sp_port->local_port;
	enum mlxsw_flood_table_type table_type;
	u16 range = idx_end - idx_begin + 1;
	char *sftr_pl;
	int err;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		table_type = MLXSW_REG_SFGC_TABLE_TYPE_FID;
		local_port = MLXSW_PORT_CPU_PORT;
	} else {
		table_type = MLXSW_REG_SFGC_TABLE_TYPE_FID_OFFEST;
	}

	sftr_pl = kmalloc(MLXSW_REG_SFTR_LEN, GFP_KERNEL);
	if (!sftr_pl)
		return -ENOMEM;

	mlxsw_reg_sftr_pack(sftr_pl, MLXSW_SP_FLOOD_TABLE_UC, idx_begin,
			    table_type, range, local_port, set);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sftr), sftr_pl);
	if (err)
		goto buffer_out;

	/* Flooding control allows one to decide whether a given port will
	 * flood unicast traffic for which there is no FDB entry.
	 */
	if (only_uc)
		goto buffer_out;

	mlxsw_reg_sftr_pack(sftr_pl, MLXSW_SP_FLOOD_TABLE_BM, idx_begin,
			    table_type, range, local_port, set);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sftr), sftr_pl);

buffer_out:
	kfree(sftr_pl);
	return err;
}

static int mlxsw_sp_port_uc_flood_set(struct mlxsw_sp_port *mlxsw_sp_port,
				      bool set)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	u16 vid, last_visited_vid;
	int err;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		u16 vfid = mlxsw_sp_vport_vfid_get(mlxsw_sp_port);

		return  __mlxsw_sp_port_flood_set(mlxsw_sp_port, vfid, vfid,
						  set, true);
	}

	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
		err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid, vid, set,
						true);
		if (err) {
			last_visited_vid = vid;
			goto err_port_flood_set;
		}
	}

	return 0;

err_port_flood_set:
	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, last_visited_vid)
		__mlxsw_sp_port_flood_set(mlxsw_sp_port, vid, vid, !set, true);
	netdev_err(dev, "Failed to configure unicast flooding\n");
	return err;
}

int mlxsw_sp_vport_flood_set(struct mlxsw_sp_port *mlxsw_sp_vport, u16 vfid,
			     bool set, bool only_uc)
{
	/* In case of vFIDs, index into the flooding table is relative to
	 * the start of the vFIDs range.
	 */
	return __mlxsw_sp_port_flood_set(mlxsw_sp_vport, vfid, vfid, set,
					 only_uc);
}

static int mlxsw_sp_port_attr_br_flags_set(struct mlxsw_sp_port *mlxsw_sp_port,
					   struct switchdev_trans *trans,
					   unsigned long brport_flags)
{
	unsigned long uc_flood = mlxsw_sp_port->uc_flood ? BR_FLOOD : 0;
	bool set;
	int err;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	if ((uc_flood ^ brport_flags) & BR_FLOOD) {
		set = mlxsw_sp_port->uc_flood ? false : true;
		err = mlxsw_sp_port_uc_flood_set(mlxsw_sp_port, set);
		if (err)
			return err;
	}

	mlxsw_sp_port->uc_flood = brport_flags & BR_FLOOD ? 1 : 0;
	mlxsw_sp_port->learning = brport_flags & BR_LEARNING ? 1 : 0;
	mlxsw_sp_port->learning_sync = brport_flags & BR_LEARNING_SYNC ? 1 : 0;

	return 0;
}

static int mlxsw_sp_ageing_set(struct mlxsw_sp *mlxsw_sp, u32 ageing_time)
{
	char sfdat_pl[MLXSW_REG_SFDAT_LEN];
	int err;

	mlxsw_reg_sfdat_pack(sfdat_pl, ageing_time);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdat), sfdat_pl);
	if (err)
		return err;
	mlxsw_sp->ageing_time = ageing_time;
	return 0;
}

static int mlxsw_sp_port_attr_br_ageing_set(struct mlxsw_sp_port *mlxsw_sp_port,
					    struct switchdev_trans *trans,
					    unsigned long ageing_clock_t)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
	u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	return mlxsw_sp_ageing_set(mlxsw_sp, ageing_time);
}

static int mlxsw_sp_port_attr_set(struct net_device *dev,
				  const struct switchdev_attr *attr,
				  struct switchdev_trans *trans)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	mlxsw_sp_port = mlxsw_sp_port_orig_get(attr->orig_dev, mlxsw_sp_port);
	if (!mlxsw_sp_port)
		return -EINVAL;

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
		err = mlxsw_sp_port_attr_stp_state_set(mlxsw_sp_port, trans,
						       attr->u.stp_state);
		break;
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
		err = mlxsw_sp_port_attr_br_flags_set(mlxsw_sp_port, trans,
						      attr->u.brport_flags);
		break;
	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
		err = mlxsw_sp_port_attr_br_ageing_set(mlxsw_sp_port, trans,
						       attr->u.ageing_time);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static int mlxsw_sp_port_pvid_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	char spvid_pl[MLXSW_REG_SPVID_LEN];

	mlxsw_reg_spvid_pack(spvid_pl, mlxsw_sp_port->local_port, vid);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spvid), spvid_pl);
}

static int mlxsw_sp_fid_create(struct mlxsw_sp *mlxsw_sp, u16 fid)
{
	char sfmr_pl[MLXSW_REG_SFMR_LEN];
	int err;

	mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_CREATE_FID, fid, fid);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);

	if (err)
		return err;

	set_bit(fid, mlxsw_sp->active_fids);
	return 0;
}

static void mlxsw_sp_fid_destroy(struct mlxsw_sp *mlxsw_sp, u16 fid)
{
	char sfmr_pl[MLXSW_REG_SFMR_LEN];

	clear_bit(fid, mlxsw_sp->active_fids);

	mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_DESTROY_FID,
			    fid, fid);
	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);
}

static int mlxsw_sp_port_fid_map(struct mlxsw_sp_port *mlxsw_sp_port, u16 fid)
{
	enum mlxsw_reg_svfa_mt mt;

	if (!list_empty(&mlxsw_sp_port->vports_list))
		mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
	else
		mt = MLXSW_REG_SVFA_MT_VID_TO_FID;

	return mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, true, fid, fid);
}

static int mlxsw_sp_port_fid_unmap(struct mlxsw_sp_port *mlxsw_sp_port, u16 fid)
{
	enum mlxsw_reg_svfa_mt mt;

	if (list_empty(&mlxsw_sp_port->vports_list))
		return 0;

	mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
	return mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, false, fid, fid);
}

static int mlxsw_sp_port_add_vids(struct net_device *dev, u16 vid_begin,
				  u16 vid_end)
{
	u16 vid;
	int err;

	for (vid = vid_begin; vid <= vid_end; vid++) {
		err = mlxsw_sp_port_add_vid(dev, 0, vid);
		if (err)
			goto err_port_add_vid;
	}
	return 0;

err_port_add_vid:
	for (vid--; vid >= vid_begin; vid--)
		mlxsw_sp_port_kill_vid(dev, 0, vid);
	return err;
}

static int __mlxsw_sp_port_vlans_set(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 vid_begin, u16 vid_end, bool is_member,
				     bool untagged)
{
	u16 vid, vid_e;
	int err;

	for (vid = vid_begin; vid <= vid_end;
	     vid += MLXSW_REG_SPVM_REC_MAX_COUNT) {
		vid_e = min((u16) (vid + MLXSW_REG_SPVM_REC_MAX_COUNT - 1),
			    vid_end);

		err = mlxsw_sp_port_vlan_set(mlxsw_sp_port, vid, vid_e,
					     is_member, untagged);
		if (err)
			return err;
	}

	return 0;
}

static int __mlxsw_sp_port_vlans_add(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 vid_begin, u16 vid_end,
				     bool flag_untagged, bool flag_pvid)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	struct net_device *dev = mlxsw_sp_port->dev;
	u16 vid, last_visited_vid, old_pvid;
	enum mlxsw_reg_svfa_mt mt;
	int err;

	/* In case this is invoked with BRIDGE_FLAGS_SELF and port is
	 * not bridged, then packets ingressing through the port with
	 * the specified VIDs will be directed to CPU.
	 */
	if (!mlxsw_sp_port->bridged)
		return mlxsw_sp_port_add_vids(dev, vid_begin, vid_end);

	for (vid = vid_begin; vid <= vid_end; vid++) {
		if (!test_bit(vid, mlxsw_sp->active_fids)) {
			err = mlxsw_sp_fid_create(mlxsw_sp, vid);
			if (err) {
				netdev_err(dev, "Failed to create FID=%d\n",
					   vid);
				return err;
			}

			/* When creating a FID, we set a VID to FID mapping
			 * regardless of the port's mode.
			 */
			mt = MLXSW_REG_SVFA_MT_VID_TO_FID;
			err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt,
							   true, vid, vid);
			if (err) {
				netdev_err(dev, "Failed to create FID=VID=%d mapping\n",
					   vid);
				goto err_port_vid_to_fid_set;
			}
		}
	}

	/* Set FID mapping according to port's mode */
	for (vid = vid_begin; vid <= vid_end; vid++) {
		err = mlxsw_sp_port_fid_map(mlxsw_sp_port, vid);
		if (err) {
			netdev_err(dev, "Failed to map FID=%d", vid);
			last_visited_vid = --vid;
			goto err_port_fid_map;
		}
	}

	err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid_begin, vid_end,
					true, false);
	if (err) {
		netdev_err(dev, "Failed to configure flooding\n");
		goto err_port_flood_set;
	}

	err = __mlxsw_sp_port_vlans_set(mlxsw_sp_port, vid_begin, vid_end,
					true, flag_untagged);
	if (err) {
		netdev_err(dev, "Unable to add VIDs %d-%d\n", vid_begin,
			   vid_end);
		goto err_port_vlans_set;
	}

	old_pvid = mlxsw_sp_port->pvid;
	if (flag_pvid && old_pvid != vid_begin) {
		err = mlxsw_sp_port_pvid_set(mlxsw_sp_port, vid_begin);
		if (err) {
			netdev_err(dev, "Unable to add PVID %d\n", vid_begin);
			goto err_port_pvid_set;
		}
		mlxsw_sp_port->pvid = vid_begin;
	}

	/* Changing activity bits only if HW operation succeded */
	for (vid = vid_begin; vid <= vid_end; vid++)
		set_bit(vid, mlxsw_sp_port->active_vlans);

	/* STP state change must be done after we set active VLANs */
	err = mlxsw_sp_port_stp_state_set(mlxsw_sp_port,
					  mlxsw_sp_port->stp_state);
	if (err) {
		netdev_err(dev, "Failed to set STP state\n");
		goto err_port_stp_state_set;
	}

	return 0;

err_port_vid_to_fid_set:
	mlxsw_sp_fid_destroy(mlxsw_sp, vid);
	return err;

err_port_stp_state_set:
	for (vid = vid_begin; vid <= vid_end; vid++)
		clear_bit(vid, mlxsw_sp_port->active_vlans);
	if (old_pvid != mlxsw_sp_port->pvid)
		mlxsw_sp_port_pvid_set(mlxsw_sp_port, old_pvid);
err_port_pvid_set:
	__mlxsw_sp_port_vlans_set(mlxsw_sp_port, vid_begin, vid_end, false,
				  false);
err_port_vlans_set:
	__mlxsw_sp_port_flood_set(mlxsw_sp_port, vid_begin, vid_end, false,
				  false);
err_port_flood_set:
	last_visited_vid = vid_end;
err_port_fid_map:
	for (vid = last_visited_vid; vid >= vid_begin; vid--)
		mlxsw_sp_port_fid_unmap(mlxsw_sp_port, vid);
	return err;
}

static int mlxsw_sp_port_vlans_add(struct mlxsw_sp_port *mlxsw_sp_port,
				   const struct switchdev_obj_port_vlan *vlan,
				   struct switchdev_trans *trans)
{
	bool untagged_flag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	bool pvid_flag = vlan->flags & BRIDGE_VLAN_INFO_PVID;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	return __mlxsw_sp_port_vlans_add(mlxsw_sp_port,
					 vlan->vid_begin, vlan->vid_end,
					 untagged_flag, pvid_flag);
}

static enum mlxsw_reg_sfd_rec_policy mlxsw_sp_sfd_rec_policy(bool dynamic)
{
	return dynamic ? MLXSW_REG_SFD_REC_POLICY_DYNAMIC_ENTRY_INGRESS :
			 MLXSW_REG_SFD_REC_POLICY_STATIC_ENTRY;
}

static enum mlxsw_reg_sfd_op mlxsw_sp_sfd_op(bool adding)
{
	return adding ? MLXSW_REG_SFD_OP_WRITE_EDIT :
			MLXSW_REG_SFD_OP_WRITE_REMOVE;
}

static int mlxsw_sp_port_fdb_uc_op(struct mlxsw_sp_port *mlxsw_sp_port,
				   const char *mac, u16 fid, bool adding,
				   bool dynamic)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	char *sfd_pl;
	int err;

	sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL);
	if (!sfd_pl)
		return -ENOMEM;

	mlxsw_reg_sfd_pack(sfd_pl, mlxsw_sp_sfd_op(adding), 0);
	mlxsw_reg_sfd_uc_pack(sfd_pl, 0, mlxsw_sp_sfd_rec_policy(dynamic),
			      mac, fid, MLXSW_REG_SFD_REC_ACTION_NOP,
			      mlxsw_sp_port->local_port);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl);
	kfree(sfd_pl);

	return err;
}

static int mlxsw_sp_port_fdb_uc_lag_op(struct mlxsw_sp *mlxsw_sp, u16 lag_id,
				       const char *mac, u16 fid, bool adding,
				       bool dynamic)
{
	char *sfd_pl;
	int err;

	sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL);
	if (!sfd_pl)
		return -ENOMEM;

	mlxsw_reg_sfd_pack(sfd_pl, mlxsw_sp_sfd_op(adding), 0);
	mlxsw_reg_sfd_uc_lag_pack(sfd_pl, 0, mlxsw_sp_sfd_rec_policy(dynamic),
				  mac, fid, MLXSW_REG_SFD_REC_ACTION_NOP,
				  lag_id);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl);
	kfree(sfd_pl);

	return err;
}

static int
mlxsw_sp_port_fdb_static_add(struct mlxsw_sp_port *mlxsw_sp_port,
			     const struct switchdev_obj_port_fdb *fdb,
			     struct switchdev_trans *trans)
{
	u16 fid = fdb->vid;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		u16 vfid = mlxsw_sp_vport_vfid_get(mlxsw_sp_port);

		fid = mlxsw_sp_vfid_to_fid(vfid);
	}

	if (!fid)
		fid = mlxsw_sp_port->pvid;

	if (!mlxsw_sp_port->lagged)
		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port,
					       fdb->addr, fid, true, false);
	else
		return mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp_port->mlxsw_sp,
						   mlxsw_sp_port->lag_id,
						   fdb->addr, fid, true, false);
}

static int mlxsw_sp_port_obj_add(struct net_device *dev,
				 const struct switchdev_obj *obj,
				 struct switchdev_trans *trans)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	mlxsw_sp_port = mlxsw_sp_port_orig_get(obj->orig_dev, mlxsw_sp_port);
	if (!mlxsw_sp_port)
		return -EINVAL;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		if (mlxsw_sp_port_is_vport(mlxsw_sp_port))
			return 0;

		err = mlxsw_sp_port_vlans_add(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj),
					      trans);
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_static_add(mlxsw_sp_port,
						   SWITCHDEV_OBJ_PORT_FDB(obj),
						   trans);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static int mlxsw_sp_port_kill_vids(struct net_device *dev, u16 vid_begin,
				   u16 vid_end)
{
	u16 vid;
	int err;

	for (vid = vid_begin; vid <= vid_end; vid++) {
		err = mlxsw_sp_port_kill_vid(dev, 0, vid);
		if (err)
			return err;
	}

	return 0;
}

static int __mlxsw_sp_port_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 vid_begin, u16 vid_end, bool init)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	u16 vid, pvid;
	int err;

	/* In case this is invoked with BRIDGE_FLAGS_SELF and port is
	 * not bridged, then prevent packets ingressing through the
	 * port with the specified VIDs from being trapped to CPU.
	 */
	if (!init && !mlxsw_sp_port->bridged)
		return mlxsw_sp_port_kill_vids(dev, vid_begin, vid_end);

	err = __mlxsw_sp_port_vlans_set(mlxsw_sp_port, vid_begin, vid_end,
					false, false);
	if (err) {
		netdev_err(dev, "Unable to del VIDs %d-%d\n", vid_begin,
			   vid_end);
		return err;
	}

	pvid = mlxsw_sp_port->pvid;
	if (pvid >= vid_begin && pvid <= vid_end && pvid != 1) {
		/* Default VLAN is always 1 */
		err = mlxsw_sp_port_pvid_set(mlxsw_sp_port, 1);
		if (err) {
			netdev_err(dev, "Unable to del PVID %d\n", pvid);
			return err;
		}
		mlxsw_sp_port->pvid = 1;
	}

	if (init)
		goto out;

	err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid_begin, vid_end,
					false, false);
	if (err) {
		netdev_err(dev, "Failed to clear flooding\n");
		return err;
	}

	for (vid = vid_begin; vid <= vid_end; vid++) {
		/* Remove FID mapping in case of Virtual mode */
		err = mlxsw_sp_port_fid_unmap(mlxsw_sp_port, vid);
		if (err) {
			netdev_err(dev, "Failed to unmap FID=%d", vid);
			return err;
		}
	}

out:
	/* Changing activity bits only if HW operation succeded */
	for (vid = vid_begin; vid <= vid_end; vid++)
		clear_bit(vid, mlxsw_sp_port->active_vlans);

	return 0;
}

static int mlxsw_sp_port_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port,
				   const struct switchdev_obj_port_vlan *vlan)
{
	return __mlxsw_sp_port_vlans_del(mlxsw_sp_port,
					 vlan->vid_begin, vlan->vid_end, false);
}

static int
mlxsw_sp_port_fdb_static_del(struct mlxsw_sp_port *mlxsw_sp_port,
			     const struct switchdev_obj_port_fdb *fdb)
{
	u16 fid = fdb->vid;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		u16 vfid = mlxsw_sp_vport_vfid_get(mlxsw_sp_port);

		fid = mlxsw_sp_vfid_to_fid(vfid);
	}

	if (!mlxsw_sp_port->lagged)
		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port,
					       fdb->addr, fid,
					       false, false);
	else
		return mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp_port->mlxsw_sp,
						   mlxsw_sp_port->lag_id,
						   fdb->addr, fid,
						   false, false);
}

static int mlxsw_sp_port_obj_del(struct net_device *dev,
				 const struct switchdev_obj *obj)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	mlxsw_sp_port = mlxsw_sp_port_orig_get(obj->orig_dev, mlxsw_sp_port);
	if (!mlxsw_sp_port)
		return -EINVAL;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		if (mlxsw_sp_port_is_vport(mlxsw_sp_port))
			return 0;

		err = mlxsw_sp_port_vlans_del(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj));
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_static_del(mlxsw_sp_port,
						   SWITCHDEV_OBJ_PORT_FDB(obj));
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static struct mlxsw_sp_port *mlxsw_sp_lag_rep_port(struct mlxsw_sp *mlxsw_sp,
						   u16 lag_id)
{
	struct mlxsw_sp_port *mlxsw_sp_port;
	int i;

	for (i = 0; i < MLXSW_SP_PORT_PER_LAG_MAX; i++) {
		mlxsw_sp_port = mlxsw_sp_port_lagged_get(mlxsw_sp, lag_id, i);
		if (mlxsw_sp_port)
			return mlxsw_sp_port;
	}
	return NULL;
}

static int mlxsw_sp_port_fdb_dump(struct mlxsw_sp_port *mlxsw_sp_port,
				  struct switchdev_obj_port_fdb *fdb,
				  switchdev_obj_dump_cb_t *cb)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	u16 vport_vid = 0, vport_fid = 0;
	char *sfd_pl;
	char mac[ETH_ALEN];
	u16 fid;
	u8 local_port;
	u16 lag_id;
	u8 num_rec;
	int stored_err = 0;
	int i;
	int err;

	sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL);
	if (!sfd_pl)
		return -ENOMEM;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		u16 tmp;

		tmp = mlxsw_sp_vport_vfid_get(mlxsw_sp_port);
		vport_fid = mlxsw_sp_vfid_to_fid(tmp);
		vport_vid = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
	}

	mlxsw_reg_sfd_pack(sfd_pl, MLXSW_REG_SFD_OP_QUERY_DUMP, 0);
	do {
		mlxsw_reg_sfd_num_rec_set(sfd_pl, MLXSW_REG_SFD_REC_MAX_COUNT);
		err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl);
		if (err)
			goto out;

		num_rec = mlxsw_reg_sfd_num_rec_get(sfd_pl);

		/* Even in case of error, we have to run the dump to the end
		 * so the session in firmware is finished.
		 */
		if (stored_err)
			continue;

		for (i = 0; i < num_rec; i++) {
			switch (mlxsw_reg_sfd_rec_type_get(sfd_pl, i)) {
			case MLXSW_REG_SFD_REC_TYPE_UNICAST:
				mlxsw_reg_sfd_uc_unpack(sfd_pl, i, mac, &fid,
							&local_port);
				if (local_port == mlxsw_sp_port->local_port) {
					if (vport_fid && vport_fid != fid)
						continue;
					else if (vport_fid)
						fdb->vid = vport_vid;
					else
						fdb->vid = fid;
					ether_addr_copy(fdb->addr, mac);
					fdb->ndm_state = NUD_REACHABLE;
					err = cb(&fdb->obj);
					if (err)
						stored_err = err;
				}
				break;
			case MLXSW_REG_SFD_REC_TYPE_UNICAST_LAG:
				mlxsw_reg_sfd_uc_lag_unpack(sfd_pl, i,
							    mac, &fid, &lag_id);
				if (mlxsw_sp_port ==
				    mlxsw_sp_lag_rep_port(mlxsw_sp, lag_id)) {
					if (vport_fid && vport_fid != fid)
						continue;
					else if (vport_fid)
						fdb->vid = vport_vid;
					else
						fdb->vid = fid;
					ether_addr_copy(fdb->addr, mac);
					fdb->ndm_state = NUD_REACHABLE;
					err = cb(&fdb->obj);
					if (err)
						stored_err = err;
				}
				break;
			}
		}
	} while (num_rec == MLXSW_REG_SFD_REC_MAX_COUNT);

out:
	kfree(sfd_pl);
	return stored_err ? stored_err : err;
}

static int mlxsw_sp_port_vlan_dump(struct mlxsw_sp_port *mlxsw_sp_port,
				   struct switchdev_obj_port_vlan *vlan,
				   switchdev_obj_dump_cb_t *cb)
{
	u16 vid;
	int err = 0;

	if (mlxsw_sp_port_is_vport(mlxsw_sp_port)) {
		vlan->flags = 0;
		vlan->vid_begin = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
		vlan->vid_end = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
		return cb(&vlan->obj);
	}

	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
		vlan->flags = 0;
		if (vid == mlxsw_sp_port->pvid)
			vlan->flags |= BRIDGE_VLAN_INFO_PVID;
		vlan->vid_begin = vid;
		vlan->vid_end = vid;
		err = cb(&vlan->obj);
		if (err)
			break;
	}
	return err;
}

static int mlxsw_sp_port_obj_dump(struct net_device *dev,
				  struct switchdev_obj *obj,
				  switchdev_obj_dump_cb_t *cb)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	mlxsw_sp_port = mlxsw_sp_port_orig_get(obj->orig_dev, mlxsw_sp_port);
	if (!mlxsw_sp_port)
		return -EINVAL;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		err = mlxsw_sp_port_vlan_dump(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj), cb);
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_dump(mlxsw_sp_port,
					     SWITCHDEV_OBJ_PORT_FDB(obj), cb);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static const struct switchdev_ops mlxsw_sp_port_switchdev_ops = {
	.switchdev_port_attr_get	= mlxsw_sp_port_attr_get,
	.switchdev_port_attr_set	= mlxsw_sp_port_attr_set,
	.switchdev_port_obj_add		= mlxsw_sp_port_obj_add,
	.switchdev_port_obj_del		= mlxsw_sp_port_obj_del,
	.switchdev_port_obj_dump	= mlxsw_sp_port_obj_dump,
};

static void mlxsw_sp_fdb_call_notifiers(bool learning, bool learning_sync,
					bool adding, char *mac, u16 vid,
					struct net_device *dev)
{
	struct switchdev_notifier_fdb_info info;
	unsigned long notifier_type;

	if (learning && learning_sync) {
		info.addr = mac;
		info.vid = vid;
		notifier_type = adding ? SWITCHDEV_FDB_ADD : SWITCHDEV_FDB_DEL;
		call_switchdev_notifiers(notifier_type, dev, &info.info);
	}
}

static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
					    char *sfn_pl, int rec_index,
					    bool adding)
{
	struct mlxsw_sp_port *mlxsw_sp_port;
	char mac[ETH_ALEN];
	u8 local_port;
	u16 vid, fid;
	int err;

	mlxsw_reg_sfn_mac_unpack(sfn_pl, rec_index, mac, &fid, &local_port);
	mlxsw_sp_port = mlxsw_sp->ports[local_port];
	if (!mlxsw_sp_port) {
		dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect local port in FDB notification\n");
		return;
	}

	err = mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port, mac, fid,
				      adding && mlxsw_sp_port->learning, true);
	if (err) {
		if (net_ratelimit())
			netdev_err(mlxsw_sp_port->dev, "Failed to set FDB entry\n");
		return;
	}

	vid = fid;

	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
				    mlxsw_sp_port->learning_sync,
				    adding, mac, vid, mlxsw_sp_port->dev);
}

static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
						char *sfn_pl, int rec_index,
						bool adding)
{
	struct mlxsw_sp_port *mlxsw_sp_port;
	char mac[ETH_ALEN];
	u16 lag_id;
	u16 vid, fid;
	int err;

	mlxsw_reg_sfn_mac_lag_unpack(sfn_pl, rec_index, mac, &fid, &lag_id);
	mlxsw_sp_port = mlxsw_sp_lag_rep_port(mlxsw_sp, lag_id);
	if (!mlxsw_sp_port) {
		dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Cannot find port representor for LAG\n");
		return;
	}

	err = mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp, lag_id, mac, fid,
					  adding && mlxsw_sp_port->learning,
					  true);
	if (err) {
		if (net_ratelimit())
			netdev_err(mlxsw_sp_port->dev, "Failed to set FDB entry\n");
		return;
	}

	vid = fid;

	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
				    mlxsw_sp_port->learning_sync,
				    adding, mac, vid,
				    mlxsw_sp_lag_get(mlxsw_sp, lag_id)->dev);
}

static void mlxsw_sp_fdb_notify_rec_process(struct mlxsw_sp *mlxsw_sp,
					    char *sfn_pl, int rec_index)
{
	switch (mlxsw_reg_sfn_rec_type_get(sfn_pl, rec_index)) {
	case MLXSW_REG_SFN_REC_TYPE_LEARNED_MAC:
		mlxsw_sp_fdb_notify_mac_process(mlxsw_sp, sfn_pl,
						rec_index, true);
		break;
	case MLXSW_REG_SFN_REC_TYPE_AGED_OUT_MAC:
		mlxsw_sp_fdb_notify_mac_process(mlxsw_sp, sfn_pl,
						rec_index, false);
		break;
	case MLXSW_REG_SFN_REC_TYPE_LEARNED_MAC_LAG:
		mlxsw_sp_fdb_notify_mac_lag_process(mlxsw_sp, sfn_pl,
						    rec_index, true);
		break;
	case MLXSW_REG_SFN_REC_TYPE_AGED_OUT_MAC_LAG:
		mlxsw_sp_fdb_notify_mac_lag_process(mlxsw_sp, sfn_pl,
						    rec_index, false);
		break;
	}
}

static void mlxsw_sp_fdb_notify_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
	schedule_delayed_work(&mlxsw_sp->fdb_notify.dw,
			      msecs_to_jiffies(mlxsw_sp->fdb_notify.interval));
}

static void mlxsw_sp_fdb_notify_work(struct work_struct *work)
{
	struct mlxsw_sp *mlxsw_sp;
	char *sfn_pl;
	u8 num_rec;
	int i;
	int err;

	sfn_pl = kmalloc(MLXSW_REG_SFN_LEN, GFP_KERNEL);
	if (!sfn_pl)
		return;

	mlxsw_sp = container_of(work, struct mlxsw_sp, fdb_notify.dw.work);

	do {
		mlxsw_reg_sfn_pack(sfn_pl);
		err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(sfn), sfn_pl);
		if (err) {
			dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get FDB notifications\n");
			break;
		}
		num_rec = mlxsw_reg_sfn_num_rec_get(sfn_pl);
		for (i = 0; i < num_rec; i++)
			mlxsw_sp_fdb_notify_rec_process(mlxsw_sp, sfn_pl, i);

	} while (num_rec);

	kfree(sfn_pl);
	mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
}

static int mlxsw_sp_fdb_init(struct mlxsw_sp *mlxsw_sp)
{
	int err;

	err = mlxsw_sp_ageing_set(mlxsw_sp, MLXSW_SP_DEFAULT_AGEING_TIME);
	if (err) {
		dev_err(mlxsw_sp->bus_info->dev, "Failed to set default ageing time\n");
		return err;
	}
	INIT_DELAYED_WORK(&mlxsw_sp->fdb_notify.dw, mlxsw_sp_fdb_notify_work);
	mlxsw_sp->fdb_notify.interval = MLXSW_SP_DEFAULT_LEARNING_INTERVAL;
	mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
	return 0;
}

static void mlxsw_sp_fdb_fini(struct mlxsw_sp *mlxsw_sp)
{
	cancel_delayed_work_sync(&mlxsw_sp->fdb_notify.dw);
}

static void mlxsw_sp_fids_fini(struct mlxsw_sp *mlxsw_sp)
{
	u16 fid;

	for_each_set_bit(fid, mlxsw_sp->active_fids, VLAN_N_VID)
		mlxsw_sp_fid_destroy(mlxsw_sp, fid);
}

int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp)
{
	return mlxsw_sp_fdb_init(mlxsw_sp);
}

void mlxsw_sp_switchdev_fini(struct mlxsw_sp *mlxsw_sp)
{
	mlxsw_sp_fdb_fini(mlxsw_sp);
	mlxsw_sp_fids_fini(mlxsw_sp);
}

int mlxsw_sp_port_vlan_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	int err;

	/* Allow only untagged packets to ingress and tag them internally
	 * with VID 1.
	 */
	mlxsw_sp_port->pvid = 1;
	err = __mlxsw_sp_port_vlans_del(mlxsw_sp_port, 0, VLAN_N_VID, true);
	if (err) {
		netdev_err(dev, "Unable to init VLANs\n");
		return err;
	}

	/* Add implicit VLAN interface in the device, so that untagged
	 * packets will be classified to the default vFID.
	 */
	err = mlxsw_sp_port_add_vid(dev, 0, 1);
	if (err)
		netdev_err(dev, "Failed to configure default vFID\n");

	return err;
}

void mlxsw_sp_port_switchdev_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
	mlxsw_sp_port->dev->switchdev_ops = &mlxsw_sp_port_switchdev_ops;
}

void mlxsw_sp_port_switchdev_fini(struct mlxsw_sp_port *mlxsw_sp_port)
{
}