N
     €ВБѓ}цЃ_†I|ҐЏ+БА &Ф    /* SPDX-License-Identifier: GPL-2.0
 * Copyright 2019-2021 NXP
 */

#ifndef _NET_DSA_TAG_OCELOT_H
#define _NET_DSA_TAG_OCELOT_H

#include <linux/packing.h>

#define OCELOT_TAG_LEN			16
#define OCELOT_SHORT_PREFIX_LEN		4
#define OCELOT_LONG_PREFIX_LEN		16
#define OCELOT_TOTAL_TAG_LEN	(OCELOT_SHORT_PREFIX_LEN + OCELOT_TAG_LEN)

/* The CPU injection header and the CPU extraction header can have 3 types of
 * prefixes: long, short and no prefix. The format of the header itself is the
 * same in all 3 cases.
 *
 * Extraction with long prefix:
 *
 * +-------------------+-------------------+------+------+------------+-------+
 * | ff:ff:ff:ff:ff:ff | fe:ff:ff:ff:ff:ff | 8880 | 000a | extraction | frame |
 * |                   |                   |      |      |   header   |       |
 * +-------------------+-------------------+------+------+------------+-------+
 *        48 bits             48 bits      16 bits 16 bits  128 bits
 *
 * Extraction with short prefix:
 *
 *                                         +------+------+------------+-------+
 *                                         | 8880 | 000a | extraction | frame |
 *                                         |      |      |   header   |       |
 *                                         +------+------+------------+-------+
 *                                         16 bits 16 bits  128 bits
 *
 * Extraction with no prefix:
 *
 *                                                       +------------+-------+
 *                                                       | extraction | frame |
 *                                                       |   header   |       |
 *                                                       +------------+-------+
 *                                                          128 bits
 *
 *
 * Injection with long prefix:
 *
 * +-------------------+-------------------+------+------+------------+-------+
 * |      any dmac     |      any smac     | 8880 | 000a | injection  | frame |
 * |                   |                   |      |      |   header   |       |
 * +-------------------+-------------------+------+------+------------+-------+
 *        48 bits             48 bits      16 bits 16 bits  128 bits
 *
 * Injection with short prefix:
 *
 *                                         +------+------+------------+-------+
 *                                         | 8880 | 000a | injection  | frame |
 *                                         |      |      |   header   |       |
 *                                         +------+------+------------+-------+
 *                                         16 bits 16 bits  128 bits
 *
 * Injection with no prefix:
 *
 *                                                       +------------+-------+
 *                                                       | injection  | frame |
 *                                                       |   header   |       |
 *                                                       +------------+-------+
 *                                                          128 bits
 *
 * The injection header looks like this (network byte order, bit 127
 * is part of lowest address byte in memory, bit 0 is part of highest
 * address byte):
 *
 *         +------+------+------+------+------+------+------+------+
 * 127:120 |BYPASS| MASQ |          MASQ_PORT        |REW_OP|REW_OP|
 *         +------+------+------+------+------+------+------+------+
 * 119:112 |                         REW_OP                        |
 *         +------+------+------+------+------+------+------+------+
 * 111:104 |                         REW_VAL                       |
 *         +------+------+------+------+------+------+------+------+
 * 103: 96 |                         REW_VAL                       |
 *         +------+------+------+------+------+------+------+------+
 *  95: 88 |                         REW_VAL                       |
 *         +------+------+------+------+------+------+------+------+
 *  87: 80 |                         REW_VAL