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67 lines
1.9 KiB
67 lines
1.9 KiB
/* 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[]; |
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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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