type37.h

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/*
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * This file is part of lazybios.
 *
 * lazybios is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * lazybios is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with lazybios. If not, see <https://www.gnu.org/licenses/>.
 */
/**
 * @file type37.h
 * @brief Public API for SMBIOS Type 37 Memory Channel.
 * @author LazySeldi
 */
 
#ifndef LAZYBIOS_TYPE37_H
#define LAZYBIOS_TYPE37_H
 
#ifndef LAZYBIOS_SHARED_API_H
#define LAZYBIOS_TYPE_HEADER_ONLY
#include "lazybios/lazybios.h"
#undef LAZYBIOS_TYPE_HEADER_ONLY
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** @brief Availability metadata for a Type 37 memory-device entry. */
typedef struct {
    lazybiosFieldStatus_t load;
    lazybiosFieldStatus_t handle;
} lazybiosType37MemoryDeviceFieldStatus_t;
 
/**
 * @brief Parsed memory-device association in an SMBIOS Type 37 channel.
 * @ingroup api_type37
 */
typedef struct {
    uint8_t load;
    uint16_t handle;
    lazybiosType37MemoryDeviceFieldStatus_t field_status;
} lazybiosType37MemoryDevice_t;
 
/** @brief Availability metadata for SMBIOS Type 37 fields. */
typedef struct {
    lazybiosFieldStatus_t channel_type;
    lazybiosFieldStatus_t maximum_channel_load;
    lazybiosFieldStatus_t memory_device_count;
    lazybiosFieldStatus_t memory_devices;
} lazybiosType37FieldStatus_t;
 
/**
 * @brief Decoded forms of the Type 37 encoded fields.
 *
 * Each member holds the decoded form of the raw field it is named for.
 * Consult the matching `field_status` member before using one.
 */
typedef struct {
    const char* channel_type;
} lazybiosType37Decoded_t;
 
/**
 * @brief Parsed SMBIOS Type 37 Memory Channel information.
 * @ingroup api_type37
 */
typedef struct {
    uint16_t handle;
    uint8_t length;
    uint8_t channel_type;
    uint8_t maximum_channel_load;
    uint8_t memory_device_count;
    lazybiosType37MemoryDevice_t* memory_devices;
    lazybiosType37Decoded_t decoded;
    lazybiosType37FieldStatus_t field_status;
} lazybiosType37_t;
 
/**
 * @brief A parsed set of SMBIOS Type 37 structures.
 * @ingroup api_type37
 */
typedef struct {
    lazybiosType37_t* entries;
    size_t count;
} lazybiosType37Array_t;
 
/** @addtogroup api_type37
 * @{
 */
 
/**
 * @brief Parses all SMBIOS Type 37 structures.
 * @param DMIData Raw DMI table container to parse.
 * @return Newly allocated set, empty when the table holds no Type 37 structure,
 *         or NULL when the arguments are unusable or an allocation fails.
 */
LAZYBIOS_WARN_UNUSED lazybiosType37Array_t* lazybiosGetType37(const lazybiosDMI_t* DMIData);
 
/**
 * @brief Releases a parsed set of SMBIOS Type 37 structures.
 * @param Type37 Set to release; may be NULL.
 */
void lazybiosFreeType37(lazybiosType37Array_t* Type37);
 
/** @} */
 
#ifdef __cplusplus
}
#endif
 
#endif