// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
 */

#include <linux/types.h>
#include <linux/string.h>
#include <linux/errno.h>

#include "rocker_hw.h"
#include "rocker_tlv.h"

void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
                      const char *buf, int buf_len)
{
        const struct rocker_tlv *tlv;
        const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
        int rem;

        memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));

        rocker_tlv_for_each(tlv, head, buf_len, rem) {
                u32 type = rocker_tlv_type(tlv);

                if (type > 0 && type <= maxtype)
                        tb[type] = tlv;
        }
}

int rocker_tlv_put(struct rocker_desc_info *desc_info,
                   int attrtype, int attrlen, const void *data)
{
        int tail_room = desc_info->data_size - desc_info->tlv_size;
        int total_size = rocker_tlv_total_size(attrlen);
        struct rocker_tlv *tlv;

        if (unlikely(tail_room < total_size))
                return -EMSGSIZE;

        tlv = rocker_tlv_start(desc_info);
        desc_info->tlv_size += total_size;
        tlv->type = attrtype;
        tlv->len = rocker_tlv_attr_size(attrlen);
        memcpy(rocker_tlv_data(tlv), data, attrlen);
        memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
        return 0;
}