| /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ |
| #ifndef BASE_H |
| #define BASE_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include <asm/byteorder.h> |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "pldm_types.h" |
| |
| typedef uint8_t pldm_tid_t; |
| |
| /** @brief PLDM Types |
| */ |
| enum pldm_supported_types { |
| PLDM_BASE = 0x00, |
| PLDM_SMBIOS = 0x01, |
| PLDM_PLATFORM = 0x02, |
| PLDM_BIOS = 0x03, |
| PLDM_FRU = 0x04, |
| PLDM_FWUP = 0x05, |
| PLDM_RDE = 0x06, |
| PLDM_OEM = 0x3F, |
| }; |
| |
| /** @brief PLDM Commands |
| */ |
| enum pldm_supported_commands { |
| PLDM_SET_TID = 0x1, |
| PLDM_GET_TID = 0x2, |
| PLDM_GET_PLDM_VERSION = 0x3, |
| PLDM_GET_PLDM_TYPES = 0x4, |
| PLDM_GET_PLDM_COMMANDS = 0x5, |
| PLDM_MULTIPART_RECEIVE = 0x9, |
| }; |
| |
| /** @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, |
| PLDM_INVALID_TRANSFER_OPERATION_FLAG = 0x21 |
| }; |
| |
| enum transfer_op_flag { |
| PLDM_GET_NEXTPART = 0, |
| PLDM_GET_FIRSTPART = 1, |
| PLDM_ACKNOWLEDGEMENT_ONLY = 2, |
| }; |
| |
| enum transfer_multipart_op_flag { |
| PLDM_XFER_FIRST_PART = 0, |
| PLDM_XFER_NEXT_PART = 1, |
| PLDM_XFER_ABORT = 2, |
| PLDM_XFER_COMPLETE = 3, |
| PLDM_XFER_CURRENT_PART = 4, |
| }; |
| |
| 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 |
| #define PLDM_MAX_TIDS 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_SET_TID_RESP_BYTES 1 |
| #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_MULTIPART_RECEIVE_REQ_BYTES 18 |
| |
| #define PLDM_VERSION_0 0 |
| #define PLDM_CURRENT_VERSION PLDM_VERSION_0 |
| |
| #define PLDM_TIMESTAMP104_SIZE 13 |
| |
| /** @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)); |
| |
| /** |
| * @brief Compare the headers from two PLDM messages to determine if the latter |
| * is a message representing a response to the former, where the former must be |
| * a request. |
| * |
| * @param[in] req - A pointer to a PLDM header object, which must represent a |
| * request |
| * @param[in] resp - A pointer to a PLDM header object, which may represent a |
| * response to the provided request. |
| * |
| * @return true if the header pointed to by resp represents a message that is a |
| * response to the header pointed to by req, otherwise false. |
| */ |
| bool pldm_msg_hdr_correlate_response(const struct pldm_msg_hdr *req, |
| const struct pldm_msg_hdr *resp); |
| |
| /** @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_set_tid_req |
| * |
| * Structure representing PLDM set tid request. |
| */ |
| |
| struct pldm_set_tid_req { |
| uint8_t tid; //!< PLDM SetTID TID 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)); |
| |
| /** @struct pldm_multipart_receive_req |
| * |
| * Structure representing PLDM multipart receive request. |
| */ |
| struct pldm_multipart_receive_req { |
| uint8_t pldm_type; //!< PLDM Type for the MultipartReceive |
| //!< command. |
| uint8_t transfer_opflag; //!< PLDM MultipartReceive operation flag. |
| uint32_t transfer_ctx; //!< Protocol-specifc context for this |
| //!< transfer. |
| uint32_t transfer_handle; //!< handle to identify the part of data to be |
| //!< received. |
| uint32_t section_offset; //!< The start offset for the requested |
| //!< section. |
| uint32_t section_length; //!< The length (in bytes) of the section |
| //!< requested. |
| } __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 |
| */ |
| uint8_t 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 |
| */ |
| uint8_t 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 request message for SetTID |
| * |
| * @param[in] instance_id - Message's instance id |
| * @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_set_tid_req(uint8_t instance_id, uint8_t tid, struct pldm_msg *msg); |
| |
| /* Responder */ |
| |
| /* MultipartRecieve */ |
| |
| /** @brief Decode a PLDM MultipartReceive request message |
| * |
| * @param[in] msg - Request message |
| * @param[in] payload_length - length of request message payload |
| * @param[out] pldm_type - PLDM type for which version is requested |
| * @param[out] transfer_opflag - Transfer Flag |
| * @param[out] transfer_ctx - The context of the packet |
| * @param[out] transfer_handle - The handle of data |
| * @param[out] section_offset - The start of the requested section |
| * @param[out] section_length - The length of the requested section |
| * @return pldm_completion_codes |
| */ |
| int decode_multipart_receive_req(const struct pldm_msg *msg, |
| size_t payload_length, uint8_t *pldm_type, |
| uint8_t *transfer_opflag, |
| uint32_t *transfer_ctx, |
| uint32_t *transfer_handle, |
| uint32_t *section_offset, |
| uint32_t *section_length); |
| |
| /** @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 */ |