/* 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[]; } __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