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200 lines
9.1 KiB
C
200 lines
9.1 KiB
C
/** @file
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The file provides the mechanism to set and get the values
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associated with a keyword exposed through a x-UEFI- prefixed
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configuration language namespace.
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Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol was introduced in UEFI Specification 2.5.
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**/
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#ifndef __EFI_CONFIG_KEYWORD_HANDLER_H__
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#define __EFI_CONFIG_KEYWORD_HANDLER_H__
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#define EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL_GUID \
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{ \
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0x0a8badd5, 0x03b8, 0x4d19, {0xb1, 0x28, 0x7b, 0x8f, 0x0e, 0xda, 0xa5, 0x96 } \
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}
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//***********************************************************
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// Progress Errors
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//***********************************************************
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#define KEYWORD_HANDLER_NO_ERROR 0x00000000
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#define KEYWORD_HANDLER_NAMESPACE_ID_NOT_FOUND 0x00000001
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#define KEYWORD_HANDLER_MALFORMED_STRING 0x00000002
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#define KEYWORD_HANDLER_KEYWORD_NOT_FOUND 0x00000004
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#define KEYWORD_HANDLER_INCOMPATIBLE_VALUE_DETECTED 0x00000008
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#define KEYWORD_HANDLER_ACCESS_NOT_PERMITTED 0x00000010
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#define KEYWORD_HANDLER_UNDEFINED_PROCESSING_ERROR 0x80000000
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typedef struct _EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL;
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/**
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This function accepts a <MultiKeywordResp> formatted string, finds the associated
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keyword owners, creates a <MultiConfigResp> string from it and forwards it to the
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EFI_HII_ROUTING_PROTOCOL.RouteConfig function.
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If there is an issue in resolving the contents of the KeywordString, then the
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function returns an error and also sets the Progress and ProgressErr with the
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appropriate information about where the issue occurred and additional data about
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the nature of the issue.
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In the case when KeywordString containing multiple keywords, when an EFI_NOT_FOUND
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error is generated during processing the second or later keyword element, the system
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storage associated with earlier keywords is not modified. All elements of the
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KeywordString must successfully pass all tests for format and access prior to making
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any modifications to storage.
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In the case when EFI_DEVICE_ERROR is returned from the processing of a KeywordString
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containing multiple keywords, the state of storage associated with earlier keywords
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is undefined.
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@param This Pointer to the EFI_KEYWORD_HANDLER _PROTOCOL instance.
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@param KeywordString A null-terminated string in <MultiKeywordResp> format.
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@param Progress On return, points to a character in the KeywordString.
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Points to the string's NULL terminator if the request
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was successful. Points to the most recent '&' before
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the first failing name / value pair (or the beginning
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of the string if the failure is in the first name / value
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pair) if the request was not successful.
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@param ProgressErr If during the processing of the KeywordString there was
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a failure, this parameter gives additional information
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about the possible source of the problem. The various
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errors are defined in "Related Definitions" below.
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@retval EFI_SUCCESS The specified action was completed successfully.
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@retval EFI_INVALID_PARAMETER One or more of the following are TRUE:
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1. KeywordString is NULL.
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2. Parsing of the KeywordString resulted in an
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error. See Progress and ProgressErr for more data.
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@retval EFI_NOT_FOUND An element of the KeywordString was not found.
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See ProgressErr for more data.
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@retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.
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See ProgressErr for more data.
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@retval EFI_ACCESS_DENIED The action violated system policy. See ProgressErr
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for more data.
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@retval EFI_DEVICE_ERROR An unexpected system error occurred. See ProgressErr
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for more data.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_CONFIG_KEYWORD_HANDLER_SET_DATA) (
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IN EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL *This,
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IN CONST EFI_STRING KeywordString,
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OUT EFI_STRING *Progress,
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OUT UINT32 *ProgressErr
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);
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/**
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This function accepts a <MultiKeywordRequest> formatted string, finds the underlying
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keyword owners, creates a <MultiConfigRequest> string from it and forwards it to the
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EFI_HII_ROUTING_PROTOCOL.ExtractConfig function.
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If there is an issue in resolving the contents of the KeywordString, then the function
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returns an EFI_INVALID_PARAMETER and also set the Progress and ProgressErr with the
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appropriate information about where the issue occurred and additional data about the
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nature of the issue.
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In the case when KeywordString is NULL, or contains multiple keywords, or when
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EFI_NOT_FOUND is generated while processing the keyword elements, the Results string
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contains values returned for all keywords processed prior to the keyword generating the
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error but no values for the keyword with error or any following keywords.
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@param This Pointer to the EFI_KEYWORD_HANDLER _PROTOCOL instance.
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@param NameSpaceId A null-terminated string containing the platform configuration
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language to search through in the system. If a NULL is passed
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in, then it is assumed that any platform configuration language
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with the prefix of "x-UEFI-" are searched.
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@param KeywordString A null-terminated string in <MultiKeywordRequest> format. If a
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NULL is passed in the KeywordString field, all of the known
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keywords in the system for the NameSpaceId specified are
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returned in the Results field.
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@param Progress On return, points to a character in the KeywordString. Points
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to the string's NULL terminator if the request was successful.
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Points to the most recent '&' before the first failing name / value
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pair (or the beginning of the string if the failure is in the first
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name / value pair) if the request was not successful.
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@param ProgressErr If during the processing of the KeywordString there was a
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failure, this parameter gives additional information about the
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possible source of the problem. See the definitions in SetData()
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for valid value definitions.
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@param Results A null-terminated string in <MultiKeywordResp> format is returned
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which has all the values filled in for the keywords in the
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KeywordString. This is a callee-allocated field, and must be freed
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by the caller after being used.
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@retval EFI_SUCCESS The specified action was completed successfully.
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@retval EFI_INVALID_PARAMETER One or more of the following are TRUE:
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1.Progress, ProgressErr, or Results is NULL.
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2.Parsing of the KeywordString resulted in an error. See
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Progress and ProgressErr for more data.
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@retval EFI_NOT_FOUND An element of the KeywordString was not found. See
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ProgressErr for more data.
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@retval EFI_NOT_FOUND The NamespaceId specified was not found. See ProgressErr
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for more data.
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@retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated. See
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ProgressErr for more data.
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@retval EFI_ACCESS_DENIED The action violated system policy. See ProgressErr for
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more data.
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@retval EFI_DEVICE_ERROR An unexpected system error occurred. See ProgressErr
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for more data.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_CONFIG_KEYWORD_HANDLER_GET_DATA) (
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IN EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL *This,
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IN CONST EFI_STRING NameSpaceId, OPTIONAL
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IN CONST EFI_STRING KeywordString, OPTIONAL
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OUT EFI_STRING *Progress,
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OUT UINT32 *ProgressErr,
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OUT EFI_STRING *Results
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);
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///
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/// The EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL provides the mechanism
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/// to set and get the values associated with a keyword exposed
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/// through a x-UEFI- prefixed configuration language namespace
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///
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struct _EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL {
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EFI_CONFIG_KEYWORD_HANDLER_SET_DATA SetData;
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EFI_CONFIG_KEYWORD_HANDLER_GET_DATA GetData;
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};
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extern EFI_GUID gEfiConfigKeywordHandlerProtocolGuid;
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#endif
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