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/*
* drivers/net/ethernet/mellanox/mlxfw/mlxfw_mfa2_tlv.h
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Yotam Gigi <yotamg@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MLXFW_MFA2_TLV_H
#define _MLXFW_MFA2_TLV_H
#include <linux/kernel.h>
#include "mlxfw_mfa2_file.h"
struct mlxfw_mfa2_tlv {
u8 version;
u8 type;
__be16 len;
u8 data[0];
} __packed;
static inline const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_get(const struct mlxfw_mfa2_file *mfa2_file, const void *ptr)
{
if (!mlxfw_mfa2_valid_ptr(mfa2_file, ptr) ||
!mlxfw_mfa2_valid_ptr(mfa2_file, ptr + sizeof(struct mlxfw_mfa2_tlv)))
return NULL;
return ptr;
}
static inline const void *
mlxfw_mfa2_tlv_payload_get(const struct mlxfw_mfa2_file *mfa2_file,
const struct mlxfw_mfa2_tlv *tlv, u8 payload_type,
size_t payload_size, bool varsize)
{
void *tlv_top;
tlv_top = (void *) tlv + be16_to_cpu(tlv->len) - 1;
if (!mlxfw_mfa2_valid_ptr(mfa2_file, tlv) ||
!mlxfw_mfa2_valid_ptr(mfa2_file, tlv_top))
return NULL;
if (tlv->type != payload_type)
return NULL;
if (varsize && (be16_to_cpu(tlv->len) < payload_size))
return NULL;
if (!varsize && (be16_to_cpu(tlv->len) != payload_size))
return NULL;
return tlv->data;
}
#define MLXFW_MFA2_TLV(name, payload_type, tlv_type) \
static inline const payload_type * \
mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \
const struct mlxfw_mfa2_tlv *tlv) \
{ \
return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \
tlv_type, sizeof(payload_type), \
false); \
}
#define MLXFW_MFA2_TLV_VARSIZE(name, payload_type, tlv_type) \
static inline const payload_type * \
mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \
const struct mlxfw_mfa2_tlv *tlv) \
{ \
return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \
tlv_type, sizeof(payload_type), \
true); \
}
#endif
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