1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
4*4882a593Smuzhiyun * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5*4882a593Smuzhiyun * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/types.h>
9*4882a593Smuzhiyun #include <linux/string.h>
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "rocker_hw.h"
13*4882a593Smuzhiyun #include "rocker_tlv.h"
14*4882a593Smuzhiyun
rocker_tlv_parse(const struct rocker_tlv ** tb,int maxtype,const char * buf,int buf_len)15*4882a593Smuzhiyun void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
16*4882a593Smuzhiyun const char *buf, int buf_len)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun const struct rocker_tlv *tlv;
19*4882a593Smuzhiyun const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
20*4882a593Smuzhiyun int rem;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun rocker_tlv_for_each(tlv, head, buf_len, rem) {
25*4882a593Smuzhiyun u32 type = rocker_tlv_type(tlv);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (type > 0 && type <= maxtype)
28*4882a593Smuzhiyun tb[type] = tlv;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
rocker_tlv_put(struct rocker_desc_info * desc_info,int attrtype,int attrlen,const void * data)32*4882a593Smuzhiyun int rocker_tlv_put(struct rocker_desc_info *desc_info,
33*4882a593Smuzhiyun int attrtype, int attrlen, const void *data)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun int tail_room = desc_info->data_size - desc_info->tlv_size;
36*4882a593Smuzhiyun int total_size = rocker_tlv_total_size(attrlen);
37*4882a593Smuzhiyun struct rocker_tlv *tlv;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun if (unlikely(tail_room < total_size))
40*4882a593Smuzhiyun return -EMSGSIZE;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun tlv = rocker_tlv_start(desc_info);
43*4882a593Smuzhiyun desc_info->tlv_size += total_size;
44*4882a593Smuzhiyun tlv->type = attrtype;
45*4882a593Smuzhiyun tlv->len = rocker_tlv_attr_size(attrlen);
46*4882a593Smuzhiyun memcpy(rocker_tlv_data(tlv), data, attrlen);
47*4882a593Smuzhiyun memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
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