/*
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* drivers/net/ethernet/mellanox/mlxfw/mlxfw_mfa2_tlv.h
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* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2017 Yotam Gigi <yotamg@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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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