1*2874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2de152192SJiri Pirko /*
3de152192SJiri Pirko * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
4de152192SJiri Pirko * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5de152192SJiri Pirko * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6de152192SJiri Pirko */
7de152192SJiri Pirko
8de152192SJiri Pirko #include <linux/types.h>
9de152192SJiri Pirko #include <linux/string.h>
10de152192SJiri Pirko #include <linux/errno.h>
11de152192SJiri Pirko
12de152192SJiri Pirko #include "rocker_hw.h"
13de152192SJiri Pirko #include "rocker_tlv.h"
14de152192SJiri Pirko
rocker_tlv_parse(const struct rocker_tlv ** tb,int maxtype,const char * buf,int buf_len)15de152192SJiri Pirko void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
16de152192SJiri Pirko const char *buf, int buf_len)
17de152192SJiri Pirko {
18de152192SJiri Pirko const struct rocker_tlv *tlv;
19de152192SJiri Pirko const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
20de152192SJiri Pirko int rem;
21de152192SJiri Pirko
22de152192SJiri Pirko memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
23de152192SJiri Pirko
24de152192SJiri Pirko rocker_tlv_for_each(tlv, head, buf_len, rem) {
25de152192SJiri Pirko u32 type = rocker_tlv_type(tlv);
26de152192SJiri Pirko
27de152192SJiri Pirko if (type > 0 && type <= maxtype)
28de152192SJiri Pirko tb[type] = tlv;
29de152192SJiri Pirko }
30de152192SJiri Pirko }
31de152192SJiri Pirko
rocker_tlv_put(struct rocker_desc_info * desc_info,int attrtype,int attrlen,const void * data)32de152192SJiri Pirko int rocker_tlv_put(struct rocker_desc_info *desc_info,
33de152192SJiri Pirko int attrtype, int attrlen, const void *data)
34de152192SJiri Pirko {
35de152192SJiri Pirko int tail_room = desc_info->data_size - desc_info->tlv_size;
36de152192SJiri Pirko int total_size = rocker_tlv_total_size(attrlen);
37de152192SJiri Pirko struct rocker_tlv *tlv;
38de152192SJiri Pirko
39de152192SJiri Pirko if (unlikely(tail_room < total_size))
40de152192SJiri Pirko return -EMSGSIZE;
41de152192SJiri Pirko
42de152192SJiri Pirko tlv = rocker_tlv_start(desc_info);
43de152192SJiri Pirko desc_info->tlv_size += total_size;
44de152192SJiri Pirko tlv->type = attrtype;
45de152192SJiri Pirko tlv->len = rocker_tlv_attr_size(attrlen);
46de152192SJiri Pirko memcpy(rocker_tlv_data(tlv), data, attrlen);
47de152192SJiri Pirko memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
48de152192SJiri Pirko return 0;
49de152192SJiri Pirko }
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