68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
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/* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */
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#ifndef _MLXFW_MFA2_TLV_H
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#define _MLXFW_MFA2_TLV_H
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#include <linux/kernel.h>
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#include "mlxfw_mfa2_file.h"
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struct mlxfw_mfa2_tlv {
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u8 version;
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u8 type;
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__be16 len;
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u8 data[0];
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} __packed;
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static inline const struct mlxfw_mfa2_tlv *
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mlxfw_mfa2_tlv_get(const struct mlxfw_mfa2_file *mfa2_file, const void *ptr)
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{
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if (!mlxfw_mfa2_valid_ptr(mfa2_file, ptr) ||
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!mlxfw_mfa2_valid_ptr(mfa2_file, ptr + sizeof(struct mlxfw_mfa2_tlv)))
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return NULL;
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return ptr;
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}
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static inline const void *
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mlxfw_mfa2_tlv_payload_get(const struct mlxfw_mfa2_file *mfa2_file,
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const struct mlxfw_mfa2_tlv *tlv, u8 payload_type,
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size_t payload_size, bool varsize)
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{
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void *tlv_top;
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tlv_top = (void *) tlv + be16_to_cpu(tlv->len) - 1;
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if (!mlxfw_mfa2_valid_ptr(mfa2_file, tlv) ||
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!mlxfw_mfa2_valid_ptr(mfa2_file, tlv_top))
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return NULL;
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if (tlv->type != payload_type)
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return NULL;
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if (varsize && (be16_to_cpu(tlv->len) < payload_size))
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return NULL;
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if (!varsize && (be16_to_cpu(tlv->len) != payload_size))
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return NULL;
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return tlv->data;
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}
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#define MLXFW_MFA2_TLV(name, payload_type, tlv_type) \
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static inline const payload_type * \
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mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \
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const struct mlxfw_mfa2_tlv *tlv) \
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{ \
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return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \
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tlv_type, sizeof(payload_type), \
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false); \
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}
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#define MLXFW_MFA2_TLV_VARSIZE(name, payload_type, tlv_type) \
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static inline const payload_type * \
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mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \
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const struct mlxfw_mfa2_tlv *tlv) \
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{ \
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return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \
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tlv_type, sizeof(payload_type), \
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true); \
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}
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#endif
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