linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Lan Emulation client header file

 *

 * Marko Kiiskila <mkiiskila@yahoo.com>

 */

​

#ifndef _LEC_H_

#define _LEC_H_

​

#include <linux/atmdev.h>

#include <linux/netdevice.h>

#include <linux/atmlec.h>

​

#define LEC_HEADER_LEN 16

​

struct lecdatahdr_8023 {

    __be16 le_header;

    unsigned char h_dest[ETH_ALEN];

    unsigned char h_source[ETH_ALEN];

    __be16 h_type;

};

​

struct lecdatahdr_8025 {

    __be16 le_header;

    unsigned char ac_pad;

    unsigned char fc;

    unsigned char h_dest[ETH_ALEN];

    unsigned char h_source[ETH_ALEN];

};

​

#define LEC_MINIMUM_8023_SIZE   62

#define LEC_MINIMUM_8025_SIZE   16

​

/*

 * Operations that LANE2 capable device can do. Two first functions

 * are used to make the device do things. See spec 3.1.3 and 3.1.4.

 *

 * The third function is intended for the MPOA component sitting on

 * top of the LANE device. The MPOA component assigns it's own function

 * to (*associate_indicator)() and the LANE device will use that

 * function to tell about TLVs it sees floating through.

 *

 */

struct lane2_ops {

    int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force,

            u8 **tlvs, u32 *sizeoftlvs);

    int (*associate_req) (struct net_device *dev, const u8 *lan_dst,

                  const u8 *tlvs, u32 sizeoftlvs);

    void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr,

                     const u8 *tlvs, u32 sizeoftlvs);

};

​

/*

 * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType

 * frames.

 *

 * 1. Dix Ethernet EtherType frames encoded by placing EtherType

 *    field in h_type field. Data follows immediately after header.

 * 2. LLC Data frames whose total length, including LLC field and data,

 *    but not padding required to meet the minimum data frame length,

 *    is less than ETH_P_802_3_MIN MUST be encoded by placing that length

 *    in the h_type field. The LLC field follows header immediately.