mlxfw_mfa2_tlv.h (1990B)
1/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2/* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */ 3 4#ifndef _MLXFW_MFA2_TLV_H 5#define _MLXFW_MFA2_TLV_H 6 7#include <linux/kernel.h> 8#include "mlxfw_mfa2_file.h" 9 10struct mlxfw_mfa2_tlv { 11 u8 version; 12 u8 type; 13 __be16 len; 14 u8 data[]; 15} __packed; 16 17static inline const struct mlxfw_mfa2_tlv * 18mlxfw_mfa2_tlv_get(const struct mlxfw_mfa2_file *mfa2_file, const void *ptr) 19{ 20 if (!mlxfw_mfa2_valid_ptr(mfa2_file, ptr) || 21 !mlxfw_mfa2_valid_ptr(mfa2_file, ptr + sizeof(struct mlxfw_mfa2_tlv))) 22 return NULL; 23 return ptr; 24} 25 26static inline const void * 27mlxfw_mfa2_tlv_payload_get(const struct mlxfw_mfa2_file *mfa2_file, 28 const struct mlxfw_mfa2_tlv *tlv, u8 payload_type, 29 size_t payload_size, bool varsize) 30{ 31 void *tlv_top; 32 33 tlv_top = (void *) tlv + be16_to_cpu(tlv->len) - 1; 34 if (!mlxfw_mfa2_valid_ptr(mfa2_file, tlv) || 35 !mlxfw_mfa2_valid_ptr(mfa2_file, tlv_top)) 36 return NULL; 37 if (tlv->type != payload_type) 38 return NULL; 39 if (varsize && (be16_to_cpu(tlv->len) < payload_size)) 40 return NULL; 41 if (!varsize && (be16_to_cpu(tlv->len) != payload_size)) 42 return NULL; 43 44 return tlv->data; 45} 46 47#define MLXFW_MFA2_TLV(name, payload_type, tlv_type) \ 48static inline const payload_type * \ 49mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \ 50 const struct mlxfw_mfa2_tlv *tlv) \ 51{ \ 52 return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \ 53 tlv_type, sizeof(payload_type), \ 54 false); \ 55} 56 57#define MLXFW_MFA2_TLV_VARSIZE(name, payload_type, tlv_type) \ 58static inline const payload_type * \ 59mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file, \ 60 const struct mlxfw_mfa2_tlv *tlv) \ 61{ \ 62 return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv, \ 63 tlv_type, sizeof(payload_type), \ 64 true); \ 65} 66 67#endif