1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * switchdev.c
4 *
5 *	Authors:
6 *	Hans J. Schultz		<netdev@kapio-technology.com>
7 *
8 */
9
10#include <net/switchdev.h>
11#include "chip.h"
12#include "global1.h"
13#include "switchdev.h"
14
15struct mv88e6xxx_fid_search_ctx {
16	u16 fid_search;
17	u16 vid_found;
18};
19
20static int __mv88e6xxx_find_vid(struct mv88e6xxx_chip *chip,
21				const struct mv88e6xxx_vtu_entry *entry,
22				void *priv)
23{
24	struct mv88e6xxx_fid_search_ctx *ctx = priv;
25
26	if (ctx->fid_search == entry->fid) {
27		ctx->vid_found = entry->vid;
28		return 1;
29	}
30
31	return 0;
32}
33
34static int mv88e6xxx_find_vid(struct mv88e6xxx_chip *chip, u16 fid, u16 *vid)
35{
36	struct mv88e6xxx_fid_search_ctx ctx;
37	int err;
38
39	ctx.fid_search = fid;
40	mv88e6xxx_reg_lock(chip);
41	err = mv88e6xxx_vtu_walk(chip, __mv88e6xxx_find_vid, &ctx);
42	mv88e6xxx_reg_unlock(chip);
43	if (err < 0)
44		return err;
45	if (err == 1)
46		*vid = ctx.vid_found;
47	else
48		return -ENOENT;
49
50	return 0;
51}
52
53int mv88e6xxx_handle_miss_violation(struct mv88e6xxx_chip *chip, int port,
54				    struct mv88e6xxx_atu_entry *entry, u16 fid)
55{
56	struct switchdev_notifier_fdb_info info = {
57		.addr = entry->mac,
58		.locked = true,
59	};
60	struct net_device *brport;
61	struct dsa_port *dp;
62	u16 vid;
63	int err;
64
65	err = mv88e6xxx_find_vid(chip, fid, &vid);
66	if (err)
67		return err;
68
69	info.vid = vid;
70	dp = dsa_to_port(chip->ds, port);
71
72	rtnl_lock();
73	brport = dsa_port_to_bridge_port(dp);
74	if (!brport) {
75		rtnl_unlock();
76		return -ENODEV;
77	}
78	err = call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
79				       brport, &info.info, NULL);
80	rtnl_unlock();
81
82	return err;
83}
84