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#ifndef BASE_H
#define BASE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <asm/byteorder.h>
#include <stddef.h>
#include <stdint.h>
#include "pldm_types.h"
/** @brief PLDM Types
*/
enum pldm_supported_types {
PLDM_BASE = 0x00,
PLDM_PLATFORM = 0x02,
PLDM_BIOS = 0x03,
PLDM_FRU = 0x04,
PLDM_FWUP = 0x05,
PLDM_OEM = 0x3F,
};
/** @brief PLDM Commands
*/
enum pldm_supported_commands {
PLDM_GET_TID = 0x2,
PLDM_GET_PLDM_VERSION = 0x3,
PLDM_GET_PLDM_TYPES = 0x4,
PLDM_GET_PLDM_COMMANDS = 0x5
};
/** @brief PLDM base codes
*/
enum pldm_completion_codes {
PLDM_SUCCESS = 0x00,
PLDM_ERROR = 0x01,
PLDM_ERROR_INVALID_DATA = 0x02,
PLDM_ERROR_INVALID_LENGTH = 0x03,
PLDM_ERROR_NOT_READY = 0x04,
PLDM_ERROR_UNSUPPORTED_PLDM_CMD = 0x05,
PLDM_ERROR_INVALID_PLDM_TYPE = 0x20
};
enum transfer_op_flag {
PLDM_GET_NEXTPART = 0,
PLDM_GET_FIRSTPART = 1,
};
enum transfer_resp_flag {
PLDM_START = 0x01,
PLDM_MIDDLE = 0x02,
PLDM_END = 0x04,
PLDM_START_AND_END = 0x05,
};
/** @brief PLDM transport protocol type
*/
enum pldm_transport_protocol_type {
PLDM_TRANSPORT_PROTOCOL_TYPE_MCTP = 0x00,
PLDM_TRANSPORT_PROTOCOL_TYPE_OEM = 0xFF,
};
/** @enum MessageType
*
* The different message types supported by the PLDM specification.
*/
typedef enum {
PLDM_RESPONSE, //!< PLDM response
PLDM_REQUEST, //!< PLDM request
PLDM_RESERVED, //!< Reserved
PLDM_ASYNC_REQUEST_NOTIFY, //!< Unacknowledged PLDM request messages
} MessageType;
#define PLDM_INSTANCE_MAX 31
#define PLDM_MAX_TYPES 64
#define PLDM_MAX_CMDS_PER_TYPE 256
/* Message payload lengths */
#define PLDM_GET_COMMANDS_REQ_BYTES 5
#define PLDM_GET_VERSION_REQ_BYTES 6
/* Response lengths are inclusive of completion code */
#define PLDM_GET_TYPES_RESP_BYTES 9
#define PLDM_GET_TID_RESP_BYTES 2
#define PLDM_GET_COMMANDS_RESP_BYTES 33
/* Response data has only one version and does not contain the checksum */
#define PLDM_GET_VERSION_RESP_BYTES 10
#define PLDM_VERSION_0 0
#define PLDM_CURRENT_VERSION PLDM_VERSION_0
/** @struct pldm_msg_hdr
*
* Structure representing PLDM message header fields
*/
struct pldm_msg_hdr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
uint8_t instance_id : 5; //!< Instance ID
uint8_t reserved : 1; //!< Reserved
uint8_t datagram : 1; //!< Datagram bit
uint8_t request : 1; //!< Request bit
#elif defined(__BIG_ENDIAN_BITFIELD)
uint8_t request : 1; //!< Request bit
uint8_t datagram : 1; //!< Datagram bit
uint8_t reserved : 1; //!< Reserved
uint8_t instance_id : 5; //!< Instance ID
#endif
#if defined(__LITTLE_ENDIAN_BITFIELD)
uint8_t type : 6; //!< PLDM type
uint8_t header_ver : 2; //!< Header version
#elif defined(__BIG_ENDIAN_BITFIELD)
uint8_t header_ver : 2; //!< Header version
uint8_t type : 6; //!< PLDM type
#endif
uint8_t command; //!< PLDM command code
} __attribute__((packed));
// Macros for byte-swapping variables in-place
#define HTOLE32(X) (X = htole32(X))
#define HTOLE16(X) (X = htole16(X))
#define LE32TOH(X) (X = le32toh(X))
#define LE16TOH(X) (X = le16toh(X))
/** @struct pldm_msg
*
* Structure representing PLDM message
*/
struct pldm_msg {
struct pldm_msg_hdr hdr; //!< PLDM message header
uint8_t payload[1]; //!< &payload[0] is the beginning of the payload
} __attribute__((packed));
/** @struct pldm_header_info
*
* The information needed to prepare PLDM header and this is passed to the
* pack_pldm_header and unpack_pldm_header API.
*/
struct pldm_header_info {
MessageType msg_type; //!< PLDM message type
uint8_t instance; //!< PLDM instance id
uint8_t pldm_type; //!< PLDM type
uint8_t command; //!< PLDM command code
uint8_t completion_code; //!< PLDM completion code, applies for response
};
/** @struct pldm_get_types_resp
*
* Structure representing PLDM get types response.
*/
struct pldm_get_types_resp {
uint8_t completion_code; //!< completion code
bitfield8_t types[8]; //!< each bit represents whether a given PLDM Type
//!< is supported
} __attribute__((packed));
/** @struct pldm_get_commands_req
*
* Structure representing PLDM get commands request.
*/
struct pldm_get_commands_req {
uint8_t type; //!< PLDM Type for which command support information is
//!< being requested
ver32_t version; //!< version for the specified PLDM Type
} __attribute__((packed));
/** @struct pldm_get_commands_resp
*
* Structure representing PLDM get commands response.
*/
struct pldm_get_commands_resp {
uint8_t completion_code; //!< completion code
bitfield8_t commands[32]; //!< each bit represents whether a given PLDM
//!< command is supported
} __attribute__((packed));
/** @struct pldm_get_version_req
*
* Structure representing PLDM get version request.
*/
struct pldm_get_version_req {
uint32_t
transfer_handle; //!< handle to identify PLDM version data transfer
uint8_t transfer_opflag; //!< PLDM GetVersion operation flag
uint8_t type; //!< PLDM Type for which version information is being
//!< requested
} __attribute__((packed));
/** @struct pldm_get_version_resp
*
* Structure representing PLDM get version response.
*/
struct pldm_get_version_resp {
uint8_t completion_code; //!< completion code
uint32_t next_transfer_handle; //!< next portion of PLDM version data
//!< transfer
uint8_t transfer_flag; //!< PLDM GetVersion transfer flag
uint8_t version_data[1]; //!< PLDM GetVersion version field
} __attribute__((packed));
/** @struct pldm_get_tid_resp
*
* Structure representing PLDM get tid response.
*/
struct pldm_get_tid_resp {
uint8_t completion_code; //!< completion code
uint8_t tid; //!< PLDM GetTID TID field
} __attribute__((packed));
/**
* @brief Populate the PLDM message with the PLDM header.The caller of this API
* allocates buffer for the PLDM header when forming the PLDM message.
* The buffer is passed to this API to pack the PLDM header.
*
* @param[in] hdr - Pointer to the PLDM header information
* @param[out] msg - Pointer to PLDM message header
*
* @return 0 on success, otherwise PLDM error codes.
* @note Caller is responsible for alloc and dealloc of msg
* and hdr params
*/
int pack_pldm_header(const struct pldm_header_info *hdr,
struct pldm_msg_hdr *msg);
/**
* @brief Unpack the PLDM header from the PLDM message.
*
* @param[in] msg - Pointer to the PLDM message header
* @param[out] hdr - Pointer to the PLDM header information
*
* @return 0 on success, otherwise PLDM error codes.
* @note Caller is responsible for alloc and dealloc of msg
* and hdr params
*/
int unpack_pldm_header(const struct pldm_msg_hdr *msg,
struct pldm_header_info *hdr);
/* Requester */
/* GetPLDMTypes */
/** @brief Create a PLDM request message for GetPLDMTypes
*
* @param[in] instance_id - Message's instance id
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_types_req(uint8_t instance_id, struct pldm_msg *msg);
/** @brief Decode a GetPLDMTypes response message
*
* Note:
* * If the return value is not PLDM_SUCCESS, it represents a
* transport layer error.
* * If the completion_code value is not PLDM_SUCCESS, it represents a
* protocol layer error and all the out-parameters are invalid.
*
* @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] types - pointer to array bitfield8_t[8] containing supported
* types (MAX_TYPES/8) = 8), as per DSP0240
* @return pldm_completion_codes
*/
int decode_get_types_resp(const struct pldm_msg *msg, size_t payload_length,
uint8_t *completion_code, bitfield8_t *types);
/* GetPLDMCommands */
/** @brief Create a PLDM request message for GetPLDMCommands
*
* @param[in] instance_id - Message's instance id
* @param[in] type - PLDM Type
* @param[in] version - Version for PLDM Type
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_commands_req(uint8_t instance_id, uint8_t type, ver32_t version,
struct pldm_msg *msg);
/** @brief Decode a GetPLDMCommands response message
*
* Note:
* * If the return value is not PLDM_SUCCESS, it represents a
* transport layer error.
* * If the completion_code value is not PLDM_SUCCESS, it represents a
* protocol layer error and all the out-parameters are invalid.
*
* @param[in] msg - Response message
* @param[in] payload_length - Length of reponse message payload
* @param[out] completion_code - Pointer to response msg's PLDM completion code
* @param[in] commands - pointer to array bitfield8_t[32] containing supported
* commands (PLDM_MAX_CMDS_PER_TYPE/8) = 32), as per DSP0240
* @return pldm_completion_codes
*/
int decode_get_commands_resp(const struct pldm_msg *msg, size_t payload_length,
uint8_t *completion_code, bitfield8_t *commands);
/* GetPLDMVersion */
/** @brief Create a PLDM request for GetPLDMVersion
*
* @param[in] instance_id - Message's instance id
* @param[in] transfer_handle - Handle to identify PLDM version data transfer.
* This handle is ignored by the responder when the
* transferop_flag is set to getFirstPart.
* @param[in] transfer_opflag - flag to indicate whether it is start of
* transfer
* @param[in] type - PLDM Type for which version is requested
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_version_req(uint8_t instance_id, uint32_t transfer_handle,
uint8_t transfer_opflag, uint8_t type,
struct pldm_msg *msg);
/** @brief Decode a GetPLDMVersion response message
*
* Note:
* * If the return value is not PLDM_SUCCESS, it represents a
* transport layer error.
* * If the completion_code value is not PLDM_SUCCESS, it represents a
* protocol layer error and all the out-parameters are invalid.
*
* @param[in] msg - Response message
* @param[in] payload_length - Length of reponse message payload
* @param[out] completion_code - Pointer to response msg's PLDM completion code
* @param[out] next_transfer_handle - the next handle for the next part of data
* @param[out] transfer_flag - flag to indicate the part of data
* @return pldm_completion_codes
*/
int decode_get_version_resp(const struct pldm_msg *msg, size_t payload_length,
uint8_t *completion_code,
uint32_t *next_transfer_handle,
uint8_t *transfer_flag, ver32_t *version);
/* GetTID */
/** @brief Decode a GetTID response message
*
* Note:
* * If the return value is not PLDM_SUCCESS, it represents a
* transport layer error.
* * If the completion_code value is not PLDM_SUCCESS, it represents a
* protocol layer error and all the out-parameters are invalid.
*
* @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] tid - Pointer to the terminus id
* @return pldm_completion_codes
*/
int decode_get_tid_resp(const struct pldm_msg *msg, size_t payload_length,
uint8_t *completion_code, uint8_t *tid);
/* Responder */
/* GetPLDMTypes */
/** @brief Create a PLDM response message for GetPLDMTypes
*
* @param[in] instance_id - Message's instance id
* @param[in] completion_code - PLDM completion code
* @param[in] types - pointer to array bitfield8_t[8] containing supported
* types (MAX_TYPES/8) = 8), as per DSP0240
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_types_resp(uint8_t instance_id, uint8_t completion_code,
const bitfield8_t *types, struct pldm_msg *msg);
/* GetPLDMCommands */
/** @brief Decode GetPLDMCommands' request data
*
* @param[in] msg - Request message
* @param[in] payload_length - Length of request message payload
* @param[out] type - PLDM Type
* @param[out] version - Version for PLDM Type
* @return pldm_completion_codes
*/
int decode_get_commands_req(const struct pldm_msg *msg, size_t payload_length,
uint8_t *type, ver32_t *version);
/** @brief Create a PLDM response message for GetPLDMCommands
*
* @param[in] instance_id - Message's instance id
* @param[in] completion_code - PLDM completion code
* @param[in] commands - pointer to array bitfield8_t[32] containing supported
* commands (PLDM_MAX_CMDS_PER_TYPE/8) = 32), as per DSP0240
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_commands_resp(uint8_t instance_id, uint8_t completion_code,
const bitfield8_t *commands, struct pldm_msg *msg);
/* GetPLDMVersion */
/** @brief Create a PLDM response for GetPLDMVersion
*
* @param[in] instance_id - Message's instance id
* @param[in] completion_code - PLDM completion code
* @param[in] next_transfer_handle - Handle to identify next portion of
* data transfer
* @param[in] transfer_flag - Represents the part of transfer
* @param[in] version_data - the version data
* @param[in] version_size - size of version data
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_version_resp(uint8_t instance_id, uint8_t completion_code,
uint32_t next_transfer_handle,
uint8_t transfer_flag, const ver32_t *version_data,
size_t version_size, struct pldm_msg *msg);
/** @brief Decode a GetPLDMVersion request message
*
* @param[in] msg - Request message
* @param[in] payload_length - length of request message payload
* @param[out] transfer_handle - the handle of data
* @param[out] transfer_opflag - Transfer Flag
* @param[out] type - PLDM type for which version is requested
* @return pldm_completion_codes
*/
int decode_get_version_req(const struct pldm_msg *msg, size_t payload_length,
uint32_t *transfer_handle, uint8_t *transfer_opflag,
uint8_t *type);
/* Requester */
/* GetTID */
/** @brief Create a PLDM request message for GetTID
*
* @param[in] instance_id - Message's instance id
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_tid_req(uint8_t instance_id, struct pldm_msg *msg);
/** @brief Create a PLDM response message for GetTID
*
* @param[in] instance_id - Message's instance id
* @param[in] completion_code - PLDM completion code
* @param[in] tid - Terminus ID
* @param[in,out] msg - Message will be written to this
* @return pldm_completion_codes
* @note Caller is responsible for memory alloc and dealloc of param
* 'msg.payload'
*/
int encode_get_tid_resp(uint8_t instance_id, uint8_t completion_code,
uint8_t tid, struct pldm_msg *msg);
/** @brief Create a PLDM response message containing only cc
*
* @param[in] instance_id - Message's instance id
* @param[in] type - PLDM Type
* @param[in] command - PLDM Command
* @param[in] cc - PLDM Completion Code
* @param[out] msg - Message will be written to this
* @return pldm_completion_codes
*/
int encode_cc_only_resp(uint8_t instance_id, uint8_t type, uint8_t command,
uint8_t cc, struct pldm_msg *msg);
/** @brief Create a PLDM message only with the header
*
* @param[in] msg_type - PLDM message type
* @param[in] instance_id - Message's instance id
* @param[in] pldm_type - PLDM Type
* @param[in] command - PLDM Command
* @param[out] msg - Message will be written to this
*
* @return pldm_completion_codes
*/
int encode_pldm_header_only(uint8_t msg_type, uint8_t instance_id,
uint8_t pldm_type, uint8_t command,
struct pldm_msg *msg);
#ifdef __cplusplus
}
#endif
#endif /* BASE_H */