/** @file
The file provides the mechanism to set and get the values
associated with a keyword exposed through a x-UEFI- prefixed
configuration language namespace.
Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __EFI_CONFIG_KEYWORD_HANDLER_H__
#define __EFI_CONFIG_KEYWORD_HANDLER_H__
#define EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL_GUID \
{ \
0x0a8badd5, 0x03b8, 0x4d19, {0xb1, 0x28, 0x7b, 0x8f, 0x0e, 0xda, 0xa5, 0x96 } \
}
//***********************************************************
// Progress Errors
//***********************************************************
#define KEYWORD_HANDLER_NO_ERROR 0x00000000
#define KEYWORD_HANDLER_NAMESPACE_ID_NOT_FOUND 0x00000001
#define KEYWORD_HANDLER_MALFORMED_STRING 0x00000002
#define KEYWORD_HANDLER_KEYWORD_NOT_FOUND 0x00000004
#define KEYWORD_HANDLER_INCOMPATIBLE_VALUE_DETECTED 0x00000008
#define KEYWORD_HANDLER_ACCESS_NOT_PERMITTED 0x00000010
#define KEYWORD_HANDLER_UNDEFINED_PROCESSING_ERROR 0x80000000
typedef struct _EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL;
/**
This function accepts a formatted string, finds the associated
keyword owners, creates a string from it and forwards it to the
EFI_HII_ROUTING_PROTOCOL.RouteConfig function.
If there is an issue in resolving the contents of the KeywordString, then the
function returns an error and also sets the Progress and ProgressErr with the
appropriate information about where the issue occurred and additional data about
the nature of the issue.
In the case when KeywordString containing multiple keywords, when an EFI_NOT_FOUND
error is generated during processing the second or later keyword element, the system
storage associated with earlier keywords is not modified. All elements of the
KeywordString must successfully pass all tests for format and access prior to making
any modifications to storage.
In the case when EFI_DEVICE_ERROR is returned from the processing of a KeywordString
containing multiple keywords, the state of storage associated with earlier keywords
is undefined.
@param This Pointer to the EFI_KEYWORD_HANDLER _PROTOCOL instance.
@param KeywordString A null-terminated string in format.
@param Progress On return, points to a character in the KeywordString.
Points to the string's NULL terminator if the request
was successful. Points to the most recent '&' before
the first failing name / value pair (or the beginning
of the string if the failure is in the first name / value
pair) if the request was not successful.
@param ProgressErr If during the processing of the KeywordString there was
a failure, this parameter gives additional information
about the possible source of the problem. The various
errors are defined in "Related Definitions" below.
@retval EFI_SUCCESS The specified action was completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following are TRUE:
1. KeywordString is NULL.
2. Parsing of the KeywordString resulted in an
error. See Progress and ProgressErr for more data.
@retval EFI_NOT_FOUND An element of the KeywordString was not found.
See ProgressErr for more data.
@retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated.
See ProgressErr for more data.
@retval EFI_ACCESS_DENIED The action violated system policy. See ProgressErr
for more data.
@retval EFI_DEVICE_ERROR An unexpected system error occurred. See ProgressErr
for more data.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_CONFIG_KEYWORD_HANDLER_SET_DATA) (
IN EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL *This,
IN CONST EFI_STRING KeywordString,
OUT EFI_STRING *Progress,
OUT UINT32 *ProgressErr
);
/**
This function accepts a formatted string, finds the underlying
keyword owners, creates a string from it and forwards it to the
EFI_HII_ROUTING_PROTOCOL.ExtractConfig function.
If there is an issue in resolving the contents of the KeywordString, then the function
returns an EFI_INVALID_PARAMETER and also set the Progress and ProgressErr with the
appropriate information about where the issue occurred and additional data about the
nature of the issue.
In the case when KeywordString is NULL, or contains multiple keywords, or when
EFI_NOT_FOUND is generated while processing the keyword elements, the Results string
contains values returned for all keywords processed prior to the keyword generating the
error but no values for the keyword with error or any following keywords.
@param This Pointer to the EFI_KEYWORD_HANDLER _PROTOCOL instance.
@param NameSpaceId A null-terminated string containing the platform configuration
language to search through in the system. If a NULL is passed
in, then it is assumed that any platform configuration language
with the prefix of "x-UEFI-" are searched.
@param KeywordString A null-terminated string in format. If a
NULL is passed in the KeywordString field, all of the known
keywords in the system for the NameSpaceId specified are
returned in the Results field.
@param Progress On return, points to a character in the KeywordString. Points
to the string's NULL terminator if the request was successful.
Points to the most recent '&' before the first failing name / value
pair (or the beginning of the string if the failure is in the first
name / value pair) if the request was not successful.
@param ProgressErr If during the processing of the KeywordString there was a
failure, this parameter gives additional information about the
possible source of the problem. See the definitions in SetData()
for valid value definitions.
@param Results A null-terminated string in format is returned
which has all the values filled in for the keywords in the
KeywordString. This is a callee-allocated field, and must be freed
by the caller after being used.
@retval EFI_SUCCESS The specified action was completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following are TRUE:
1.Progress, ProgressErr, or Resuts is NULL.
2.Parsing of the KeywordString resulted in an error. See
Progress and ProgressErr for more data.
@retval EFI_NOT_FOUND An element of the KeywordString was not found. See
ProgressErr for more data.
@retval EFI_NOT_FOUND The NamespaceId specified was not found. See ProgressErr
for more data.
@retval EFI_OUT_OF_RESOURCES Required system resources could not be allocated. See
ProgressErr for more data.
@retval EFI_ACCESS_DENIED The action violated system policy. See ProgressErr for
more data.
@retval EFI_DEVICE_ERROR An unexpected system error occurred. See ProgressErr
for more data.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_CONFIG_KEYWORD_HANDLER_GET_DATA) (
IN EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL *This,
IN CONST EFI_STRING NameSpaceId, OPTIONAL
IN CONST EFI_STRING KeywordString, OPTIONAL
OUT EFI_STRING *Progress,
OUT UINT32 *ProgressErr,
OUT EFI_STRING *Results
);
///
/// The EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL provides the mechanism
/// to set and get the values associated with a keyword exposed
/// through a x-UEFI- prefixed configuration language namespace
///
struct _EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL {
EFI_CONFIG_KEYWORD_HANDLER_SET_DATA SetData;
EFI_CONFIG_KEYWORD_HANDLER_GET_DATA GetData;
};
extern EFI_GUID gEfiConfigKeywordHandlerProtocolGuid;
#endif