libpldm/bios.h

#ifndef BIOS_H
#define BIOS_H

#ifdef __cplusplus
extern "C" {
#endif

#include <asm/byteorder.h>
#include <stddef.h>
#include <stdint.h>

#include "base.h"

/* Response lengths are inclusive of completion code */
#define PLDM_GET_DATE_TIME_RESP_BYTES 8

#define PLDM_GET_BIOS_TABLE_REQ_BYTES 6
#define PLDM_GET_BIOS_TABLE_MIN_RESP_BYTES 6
#define PLDM_GET_BIOS_ATTR_CURR_VAL_BY_HANDLE_REQ_BYTES 7

enum pldm_bios_completion_codes {
	PLDM_BIOS_TABLE_UNAVAILABLE = 0x83,
	PLDM_INVALID_BIOS_TABLE_DATA_INTEGRITY_CHECK = 0x84,
	PLDM_INVALID_BIOS_TABLE_TYPE = 0x85,
};
enum pldm_bios_commands {
	PLDM_GET_BIOS_TABLE = 0x01,
	PLDM_GET_BIOS_ATTRIBUTE_CURRENT_VALUE_BY_HANDLE = 0x08,
	PLDM_GET_DATE_TIME = 0x0c,
};

enum pldm_bios_table_types {
	PLDM_BIOS_STRING_TABLE,
	PLDM_BIOS_ATTR_TABLE,
	PLDM_BIOS_ATTR_VAL_TABLE,
};

struct pldm_bios_string_table_entry {
	uint16_t string_handle;
	uint16_t string_length;
	char name[1];
} __attribute__((packed));

struct pldm_bios_attr_table_entry {
	uint16_t attr_handle;
	uint8_t attr_type;
	uint16_t string_handle;
	uint8_t metadata[1];
} __attribute__((packed));

struct pldm_bios_enum_attr {
	uint8_t num_possible_values;
	uint16_t indices[1];
} __attribute__((packed));

struct pldm_bios_attr_val_table_entry {
	uint16_t attr_handle;
	uint8_t attr_type;
	uint8_t value[1];
} __attribute__((packed));

enum pldm_bios_attribute_type {
	PLDM_BIOS_ENUMERATION = 0x0,
	PLDM_BIOS_STRING = 0x1,
	PLDM_BIOS_PASSWORD = 0x2,
	PLDM_BIOS_INTEGER = 0x3,
	PLDM_BIOS_ENUMERATION_READ_ONLY = 0x80,
	PLDM_BIOS_STRING_READ_ONLY = 0x81,
	PLDM_BIOS_PASSWORD_READ_ONLY = 0x82,
	PLDM_BIOS_INTEGER_READ_ONLY = 0x83,
};

/** @struct pldm_get_bios_table_req
 *
 *  structure representing GetBIOSTable request packet
 */
struct pldm_get_bios_table_req {
	uint32_t transfer_handle;
	uint8_t transfer_op_flag;
	uint8_t table_type;
} __attribute__((packed));

/** @struct pldm_get_bios_table_resp
 *
 *  structure representing GetBIOSTable response packet
 */
struct pldm_get_bios_table_resp {
	uint8_t completion_code;
	uint32_t next_transfer_handle;
	uint8_t transfer_flag;
	uint8_t table_data[1];
} __attribute__((packed));

/** @struct pldm_get_date_time_resp
 *
 *  Structure representing PLDM get date time response
 */
struct pldm_get_date_time_resp {
	uint8_t completion_code; //!< completion code
	uint8_t seconds;	 //!< Seconds in BCD format
	uint8_t minutes;	 //!< Minutes in BCD format
	uint8_t hours;		 //!< Hours in BCD format
	uint8_t day;		 //!< Day of the month in BCD format
	uint8_t month;		 //!< Month in BCD format
	uint16_t year;		 //!< Year in BCD format
} __attribute__((packed));

/** @struct pldm_get_bios_attribute_current_value_by_handle_req
 *
 *  structure representing GetBIOSAttributeCurrentValueByHandle request packet
 */
struct pldm_get_bios_attribute_current_value_by_handle_req {
	uint32_t transfer_handle;
	uint8_t transfer_op_flag;
	uint16_t attribute_handle;
} __attribute__((packed));

/** @struct pldm_get_bios_attribute_current_value_by_handle_resp
 *
 *  structure representing GetBIOSAttributeCurrentValueByHandle response
 */
struct pldm_get_bios_attribute_current_value_by_handle_resp {
	uint8_t completion_code;
	uint32_t next_transfer_handle;
	uint8_t transfer_flag;
	uint8_t attribute_data[1];
} __attribute__((packed));

/* Requester */

/* GetDateTime */

/** @brief Create a PLDM request message for GetDateTime
 *
 *  @param[in] instance_id - Message's instance id
 *  @param[out] msg - Message will be written to this
 *  @return pldm_completion_codes
 *  @note  Caller is responsible for memory alloc and dealloc of param
 *         'msg.body.payload'
 */

int encode_get_date_time_req(uint8_t instance_id, struct pldm_msg *msg);

/** @brief Decode a GetDateTime response message
 *
 *  @param[in] msg - Response message
 *  @param[in] payload_length - Length of response message payload
 *  @param[out] completion_code - Pointer to response msg's PLDM completion code
 *  @param[out] seconds - Seconds in BCD format
 *  @param[out] minutes - minutes in BCD format
 *  @param[out] hours - hours in BCD format
 *  @param[out] day - day of month in BCD format
 *  @param[out] month - number of month in BCD format
 *  @param[out] year - year in BCD format
 *  @return pldm_completion_codes
 */
int decode_get_date_time_resp(const struct pldm_msg *msg, size_t payload_length,
			      uint8_t *completion_code, uint8_t *seconds,
			      uint8_t *minutes, uint8_t *hours, uint8_t *day,
			      uint8_t *month, uint16_t *year);

/* Responder */

/* GetDateTime */

/** @brief Create a PLDM response message for GetDateTime
 *
 *  @param[in] instance_id - Message's instance id
 *  @param[in] completion_code - PLDM completion code
 *  @param[in] seconds - seconds in BCD format
 *  @param[in] minutes - minutes in BCD format
 *  @param[in] hours - hours in BCD format
 *  @param[in] day - day of the month in BCD format
 *  @param[in] month - number of month in BCD format
 *  @param[in] year - year in BCD format
 *  @param[out] msg - Message will be written to this
 *  @return pldm_completion_codes
 *  @note  Caller is responsible for memory alloc and dealloc of param
 *         'msg.body.payload'
 */

int encode_get_date_time_resp(uint8_t instance_id, uint8_t completion_code,
			      uint8_t seconds, uint8_t minutes, uint8_t hours,
			      uint8_t day, uint8_t month, uint16_t year,
			      struct pldm_msg *msg);

/* GetBIOSTable */

/** @brief Create a PLDM response message for GetBIOSTable
 *
 *  @param[in] instance_id - Message's instance id
 *  @param[in] completion_code - PLDM completion code
 *  @param[in] next_transfer_handle - handle to identify the next portion of the
 * transfer
 *  @param[in] transfer_flag - To indicate what part of the transfer this
 * response represents
 *  @param[in] table_data - BIOS Table type specific data
 *  @param[in] payload_length - Length of payload message
 *  @param[out] msg - Message will be written to this
 *  @return pldm_completion_codes
 */
int encode_get_bios_table_resp(uint8_t instance_id, uint8_t completion_code,
			       uint32_t next_transfer_handle,
			       uint8_t transfer_flag, uint8_t *table_data,
			       size_t payload_length, struct pldm_msg *msg);

/** @brief Decode GetBIOSTable request packet
 *
 *  @param[in] msg - Request message
 *  @param[in] payload_length - Length of request message payload
 *  @param[out] transfer_handle - Handle to identify a BIOS table transfer
 *  @param[out] transfer_op_flag - Flag to indicate the start of a multipart
 * transfer
 *  @param[out] table_type - BIOS table type
 *  @return pldm_completion_codes
 */
int decode_get_bios_table_req(const struct pldm_msg *msg, size_t payload_length,
			      uint32_t *transfer_handle,
			      uint8_t *transfer_op_flag, uint8_t *table_type);

/* GetBIOSAttributeCurrentValueByHandle */

/** @brief Decode GetBIOSAttributeCurrentValueByHandle request packet
 *
 *  @param[in] msg - Request message
 *  @param[in] payload_length - Length of request message payload
 *  @param[out] transfer_handle - Handle to identify a BIOS table transfer
 *  @param[out] transfer_op_flag - Flag to indicate the start of a multipart
 * transfer
 *  @param[out] attribute_handle - Handle to identify the BIOS attribute
 *  @return pldm_completion_codes
 */
int decode_get_bios_attribute_current_value_by_handle_req(
    const struct pldm_msg *msg, size_t payload_length,
    uint32_t *transfer_handle, uint8_t *transfer_op_flag,
    uint16_t *attribute_handle);

/** @brief Create a PLDM response message for
 * GetBIOSAttributeCurrentValueByHandle
 *
 *  @param[in] instance_id - Message's instance id
 *  @param[in] completion_code - PLDM completion code
 *  @param[in] next_transfer_handle - handle to identify the next portion of the
 * transfer
 *  @param[in] transfer_flag - To indicate what part of the transfer this
 * response represents
 *  @param[in] attribute_data - contains current value of attribute
 *  @param[in] attribute_length - Length of attribute
 *  @param[out] msg - Message will be written to this
 *  @return pldm_completion_codes
 */
int encode_get_bios_current_value_by_handle_resp(
    uint8_t instance_id, uint8_t completion_code, uint32_t next_transfer_handle,
    uint8_t transfer_flag, const uint8_t *attribute_data,
    size_t attribute_length, struct pldm_msg *msg);

#ifdef __cplusplus
}
#endif

#endif /* BIOS_H */