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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver4 * 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}50