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/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */
#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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