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/** @file
The data hub protocol is used both by agents wishing to log
data and those wishing to be made aware of all information that
has been logged. This protocol may only be called <= TPL_NOTIFY.
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Revision Reference:
The Data Hub Protocol is defined in Framework for EFI Data Hub Specification
Version 0.9.
**/
#ifndef __DATA_HUB_H__
#define __DATA_HUB_H__
#define EFI_DATA_HUB_PROTOCOL_GUID \
{ \
0xae80d021, 0x618e, 0x11d4, {0xbc, 0xd7, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } \
}
//
// EFI generic Data Hub Header
//
// A Data Record is an EFI_DATA_RECORD_HEADER followed by RecordSize bytes of
// data. The format of the data is defined by the DataRecordGuid.
//
// If EFI_DATA_RECORD_HEADER is extended in the future, the Version number and HeaderSize must
// change.
//
// The logger is responcible for initializing:
// Version, HeaderSize, RecordSize, DataRecordGuid, DataRecordClass
//
// The Data Hub driver is responcible for initializing:
// LogTime and LogMonotonicCount.
//
#define EFI_DATA_RECORD_HEADER_VERSION 0x0100
typedef struct {
UINT16 Version;
UINT16 HeaderSize;
UINT32 RecordSize;
EFI_GUID DataRecordGuid;
EFI_GUID ProducerName;
UINT64 DataRecordClass;
EFI_TIME LogTime;
UINT64 LogMonotonicCount;
} EFI_DATA_RECORD_HEADER;
//
// Definition of DataRecordClass. These are used to filter out class types
// at a very high level. The DataRecordGuid still defines the format of
// the data. See the Data Hub Specification for rules on what can and can not be a
// new DataRecordClass
//
#define EFI_DATA_RECORD_CLASS_DEBUG 0x0000000000000001
#define EFI_DATA_RECORD_CLASS_ERROR 0x0000000000000002
#define EFI_DATA_RECORD_CLASS_DATA 0x0000000000000004
#define EFI_DATA_RECORD_CLASS_PROGRESS_CODE 0x0000000000000008
//
// Forward reference for pure ANSI compatability
//
typedef struct _EFI_DATA_HUB_PROTOCOL EFI_DATA_HUB_PROTOCOL;
/**
Logs a data record to the system event log.
@param This The EFI_DATA_HUB_PROTOCOL instance.
@param DataRecordGuid A GUID that indicates the format of the data passed into RawData.
@param ProducerName A GUID that indicates the identity of the caller to this API.
@param DataRecordClass This class indicates the generic type of the data record.
@param RawData The DataRecordGuid-defined data to be logged.
@param RawDataSize The size in bytes of RawData.
@retval EFI_SUCCESS Data was logged.
@retval EFI_OUT_OF_RESOURCES Data was not logged due to lack of system resources.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DATA_HUB_LOG_DATA)(
IN EFI_DATA_HUB_PROTOCOL *This,
IN EFI_GUID *DataRecordGuid,
IN EFI_GUID *ProducerName,
IN UINT64 DataRecordClass,
IN VOID *RawData,
IN UINT32 RawDataSize
);
/**
Allows the system data log to be searched.
@param This The EFI_DATA_HUB_PROTOCOL instance.
@param MonotonicCount On input, it specifies the Record to return.
An input of zero means to return the first record,
as does an input of one.
@param FilterDriver If FilterDriver is not passed in a MonotonicCount
of zero, it means to return the first data record.
If FilterDriver is passed in, then a MonotonicCount
of zero means to return the first data not yet read
by FilterDriver.
@param Record Returns a dynamically allocated memory buffer with
a data record that matches MonotonicCount.
@retval EFI_SUCCESS Data was returned in Record.
@retval EFI_INVALID_PARAMETER FilterDriver was passed in but does not exist.
@retval EFI_NOT_FOUND MonotonicCount does not match any data record
in the system. If a MonotonicCount of zero was
passed in, then no data records exist in the system.
@retval EFI_OUT_OF_RESOURCES Record was not returned due to lack
of system resources.
@note Inconsistent with specification here:
In Framework for EFI Data Hub Specification, Version 0.9, This definition
is named as EFI_DATA_HUB_GET_NEXT_DATA_RECORD. The inconsistency is
maintained for backward compatibility.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DATA_HUB_GET_NEXT_RECORD)(
IN EFI_DATA_HUB_PROTOCOL *This,
IN OUT UINT64 *MonotonicCount,
IN EFI_EVENT *FilterDriver OPTIONAL,
OUT EFI_DATA_RECORD_HEADER **Record
);
/**
Registers an event to be signaled every time a data record is logged in the system.
@param This The EFI_DATA_HUB_PROTOCOL instance.
@param FilterEvent The EFI_EVENT to signal whenever data that matches
FilterClass is logged in the system.
@param FilterTpl The maximum EFI_TPL at which FilterEvent can be
signaled. It is strongly recommended that you use
the lowest EFI_TPL possible.
@param FilterClass FilterEvent will be signaled whenever a bit
in EFI_DATA_RECORD_HEADER.DataRecordClass is also
set in FilterClass. If FilterClass is zero, no
class-based filtering will be performed.
@param FilterDataRecordGuid FilterEvent will be signaled whenever
FilterDataRecordGuid matches
EFI_DATA_RECORD_HEADER.DataRecordGuid.
If FilterDataRecordGuid is NULL, then no GUID-based
filtering will be performed.
@retval EFI_SUCCESS The filter driver event was registered
@retval EFI_ALREADY_STARTED FilterEvent was previously registered and cannot
be registered again.
@retval EFI_OUT_OF_RESOURCES The filter driver event was not registered
due to lack of system resources.
@note Inconsistent with specification here:
In Framework for EFI Data Hub Specification, Version 0.9, This definition
is named as EFI_DATA_HUB_REGISTER_DATA_FILTER_DRIVER. The inconsistency
is maintained for backward compatibility.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DATA_HUB_REGISTER_FILTER_DRIVER)(
IN EFI_DATA_HUB_PROTOCOL *This,
IN EFI_EVENT FilterEvent,
IN EFI_TPL FilterTpl,
IN UINT64 FilterClass,
IN EFI_GUID *FilterDataRecordGuid OPTIONAL
);
/**
Stops a filter driver from being notified when data records are logged.
@param This The EFI_DATA_HUB_PROTOCOL instance.
@param FilterEvent The EFI_EVENT to remove from the list of events to be
signaled every time errors are logged.
@retval EFI_SUCCESS The filter driver represented by FilterEvent was shut off.
@retval EFI_NOT_FOUND FilterEvent did not exist.
@note Inconsistent with specification here:
In Framework for EFI Data Hub Specification, Version 0.9, This definition
is named as EFI_DATA_HUB_UNREGISTER_DATA_FILTER_DRIVER. The inconsistency
is maintained for backward compatibility.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DATA_HUB_UNREGISTER_FILTER_DRIVER)(
IN EFI_DATA_HUB_PROTOCOL *This,
IN EFI_EVENT FilterEvent
);
/**
This protocol is used to log information and register filter drivers
to receive data records.
**/
struct _EFI_DATA_HUB_PROTOCOL {
///
/// Logs a data record.
///
EFI_DATA_HUB_LOG_DATA LogData;
///
/// Gets a data record. Used both to view the memory-based log and to
/// get information about which data records have been consumed by a filter driver.
///
EFI_DATA_HUB_GET_NEXT_RECORD GetNextRecord;
///
/// Allows the registration of an EFI event to act as a filter driver for all data records that are logged.
///
EFI_DATA_HUB_REGISTER_FILTER_DRIVER RegisterFilterDriver;
///
/// Used to remove a filter driver that was added with RegisterFilterDriver().
///
EFI_DATA_HUB_UNREGISTER_FILTER_DRIVER UnregisterFilterDriver;
};
extern EFI_GUID gEfiDataHubProtocolGuid;
#endif
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