// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * switchdev.c
 *
 *      Authors:
 *      Hans J. Schultz         <netdev@kapio-technology.com>
 *
 */

#include <net/switchdev.h>
#include "chip.h"
#include "global1.h"
#include "switchdev.h"

struct mv88e6xxx_fid_search_ctx {
        u16 fid_search;
        u16 vid_found;
};

static int __mv88e6xxx_find_vid(struct mv88e6xxx_chip *chip,
                                const struct mv88e6xxx_vtu_entry *entry,
                                void *priv)
{
        struct mv88e6xxx_fid_search_ctx *ctx = priv;

        if (ctx->fid_search == entry->fid) {
                ctx->vid_found = entry->vid;
                return 1;
        }

        return 0;
}

static int mv88e6xxx_find_vid(struct mv88e6xxx_chip *chip, u16 fid, u16 *vid)
{
        struct mv88e6xxx_fid_search_ctx ctx;
        int err;

        ctx.fid_search = fid;
        mv88e6xxx_reg_lock(chip);
        err = mv88e6xxx_vtu_walk(chip, __mv88e6xxx_find_vid, &ctx);
        mv88e6xxx_reg_unlock(chip);
        if (err < 0)
                return err;
        if (err == 1)
                *vid = ctx.vid_found;
        else
                return -ENOENT;

        return 0;
}

int mv88e6xxx_handle_miss_violation(struct mv88e6xxx_chip *chip, int port,
                                    struct mv88e6xxx_atu_entry *entry, u16 fid)
{
        struct switchdev_notifier_fdb_info info = {
                .addr = entry->mac,
                .locked = true,
        };
        struct net_device *brport;
        struct dsa_port *dp;
        u16 vid;
        int err;

        err = mv88e6xxx_find_vid(chip, fid, &vid);
        if (err)
                return err;

        info.vid = vid;
        dp = dsa_to_port(chip->ds, port);

        rtnl_lock();
        brport = dsa_port_to_bridge_port(dp);
        if (!brport) {
                rtnl_unlock();
                return -ENODEV;
        }
        err = call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
                                       brport, &info.info, NULL);
        rtnl_unlock();

        return err;
}