1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
 4 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
 5 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
 6 */
 7
 8#include <linux/types.h>
 9#include <linux/string.h>
10#include <linux/errno.h>
11
12#include "rocker_hw.h"
13#include "rocker_tlv.h"
14
15void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
16		      const char *buf, int buf_len)
17{
18	const struct rocker_tlv *tlv;
19	const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
20	int rem;
21
22	memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
23
24	rocker_tlv_for_each(tlv, head, buf_len, rem) {
25		u32 type = rocker_tlv_type(tlv);
26
27		if (type > 0 && type <= maxtype)
28			tb[type] = tlv;
29	}
30}
31
32int rocker_tlv_put(struct rocker_desc_info *desc_info,
33		   int attrtype, int attrlen, const void *data)
34{
35	int tail_room = desc_info->data_size - desc_info->tlv_size;
36	int total_size = rocker_tlv_total_size(attrlen);
37	struct rocker_tlv *tlv;
38
39	if (unlikely(tail_room < total_size))
40		return -EMSGSIZE;
41
42	tlv = rocker_tlv_start(desc_info);
43	desc_info->tlv_size += total_size;
44	tlv->type = attrtype;
45	tlv->len = rocker_tlv_attr_size(attrlen);
46	memcpy(rocker_tlv_data(tlv), data, attrlen);
47	memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
48	return 0;
49}