54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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;
|
||
|
|
}
|