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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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/*
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* drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
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* Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
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* Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include "rocker_hw.h"
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#include "rocker_tlv.h"
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void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
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const char *buf, int buf_len)
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{
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const struct rocker_tlv *tlv;
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const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
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int rem;
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memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
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rocker_tlv_for_each(tlv, head, buf_len, rem) {
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u32 type = rocker_tlv_type(tlv);
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if (type > 0 && type <= maxtype)
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tb[type] = tlv;
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}
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}
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int rocker_tlv_put(struct rocker_desc_info *desc_info,
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int attrtype, int attrlen, const void *data)
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{
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int tail_room = desc_info->data_size - desc_info->tlv_size;
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int total_size = rocker_tlv_total_size(attrlen);
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struct rocker_tlv *tlv;
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if (unlikely(tail_room < total_size))
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return -EMSGSIZE;
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tlv = rocker_tlv_start(desc_info);
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desc_info->tlv_size += total_size;
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tlv->type = attrtype;
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tlv->len = rocker_tlv_attr_size(attrlen);
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memcpy(rocker_tlv_data(tlv), data, attrlen);
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memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
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return 0;
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}
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