/** @file
The EFI HII results processing protocol invokes this type of protocol
when it needs to forward results to a driver's configuration handler.
This protocol is published by drivers providing and requesting
configuration data from HII. It may only be invoked by HII.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Revision Reference:
This Protocol was introduced in UEFI Specification 2.1.
**/
#ifndef __EFI_HII_CONFIG_ACCESS_H__
#define __EFI_HII_CONFIG_ACCESS_H__
#include
#define EFI_HII_CONFIG_ACCESS_PROTOCOL_GUID \
{ 0x330d4706, 0xf2a0, 0x4e4f, { 0xa3, 0x69, 0xb6, 0x6f, 0xa8, 0xd5, 0x43, 0x85 } }
typedef struct _EFI_HII_CONFIG_ACCESS_PROTOCOL EFI_HII_CONFIG_ACCESS_PROTOCOL;
typedef UINTN EFI_BROWSER_ACTION;
#define EFI_BROWSER_ACTION_CHANGING 0
#define EFI_BROWSER_ACTION_CHANGED 1
#define EFI_BROWSER_ACTION_RETRIEVE 2
#define EFI_BROWSER_ACTION_FORM_OPEN 3
#define EFI_BROWSER_ACTION_FORM_CLOSE 4
#define EFI_BROWSER_ACTION_SUBMITTED 5
#define EFI_BROWSER_ACTION_DEFAULT_STANDARD 0x1000
#define EFI_BROWSER_ACTION_DEFAULT_MANUFACTURING 0x1001
#define EFI_BROWSER_ACTION_DEFAULT_SAFE 0x1002
#define EFI_BROWSER_ACTION_DEFAULT_PLATFORM 0x2000
#define EFI_BROWSER_ACTION_DEFAULT_HARDWARE 0x3000
#define EFI_BROWSER_ACTION_DEFAULT_FIRMWARE 0x4000
/**
This function allows the caller to request the current
configuration for one or more named elements. The resulting
string is in format. Any and all alternative
configuration strings shall also be appended to the end of the
current configuration string. If they are, they must appear
after the current configuration. They must contain the same
routing (GUID, NAME, PATH) as the current configuration string.
They must have an additional description indicating the type of
alternative configuration the string represents,
"ALTCFG=". That (when
converted from Hex UNICODE to binary) is a reference to a
string in the associated string pack.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Request A null-terminated Unicode string in
format. Note that this
includes the routing information as well as
the configurable name / value pairs. It is
invalid for this string to be in
format.
If a NULL is passed in for the Request field,
all of the settings being abstracted by this function
will be returned in the Results field. In addition,
if a ConfigHdr is passed in with no request elements,
all of the settings being abstracted for that particular
ConfigHdr reference will be returned in the Results Field.
@param Progress On return, points to a character in the
Request string. Points to the string's null
terminator if 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 Results A null-terminated Unicode string in
format which has all values
filled in for the names in the Request string.
String to be allocated by the called function.
@retval EFI_SUCCESS The Results string is filled with the
values corresponding to all requested
names.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the
parts of the results that must be
stored awaiting possible future
protocols.
@retval EFI_NOT_FOUND A configuration element matching
the routing data is not found.
Progress set to the first character
in the routing header.
@retval EFI_INVALID_PARAMETER Illegal syntax. Progress set
to most recent "&" before the
error or the beginning of the
string.
@retval EFI_INVALID_PARAMETER Unknown name. Progress points
to the "&" before the name in
question.
@retval EFI_INVALID_PARAMETER If Results or Progress is NULL.
@retval EFI_ACCESS_DENIED The action violated a system policy.
@retval EFI_DEVICE_ERROR Failed to extract the current configuration
for one or more named elements.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_ACCESS_EXTRACT_CONFIG)(
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Request,
OUT EFI_STRING *Progress,
OUT EFI_STRING *Results
);
/**
This function applies changes in a driver's configuration.
Input is a Configuration, which has the routing data for this
driver followed by name / value configuration pairs. The driver
must apply those pairs to its configurable storage. If the
driver's configuration is stored in a linear block of data
and the driver's name / value pairs are in
format, it may use the ConfigToBlock helper function (above) to
simplify the job.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Configuration A null-terminated Unicode string in
format.
@param Progress A pointer to a string filled in with the
offset of the most recent '&' before the
first failing name / value pair (or the
beginn ing of the string if the failure
is in the first name / value pair) or
the terminating NULL if all was
successful.
@retval EFI_SUCCESS The results have been distributed or are
awaiting distribution.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the
parts of the results that must be
stored awaiting possible future
protocols.
@retval EFI_INVALID_PARAMETERS Passing in a NULL for the
Results parameter would result
in this type of error.
@retval EFI_NOT_FOUND Target for the specified routing data
was not found
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_ACCESS_ROUTE_CONFIG)(
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Configuration,
OUT EFI_STRING *Progress
);
/**
This function is called to provide results data to the driver.
This data consists of a unique key that is used to identify
which data is either being passed back or being asked for.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Action Specifies the type of action taken by the browser.
@param QuestionId A unique value which is sent to the original
exporting driver so that it can identify the type
of data to expect. The format of the data tends to
vary based on the opcode that generated the callback.
@param Type The type of value for the question.
@param Value A pointer to the data being sent to the original
exporting driver.
@param ActionRequest On return, points to the action requested by the
callback function.
@retval EFI_SUCCESS The callback successfully handled the action.
@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the
variable and its data.
@retval EFI_DEVICE_ERROR The variable could not be saved.
@retval EFI_UNSUPPORTED The specified Action is not supported by the
callback.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_ACCESS_FORM_CALLBACK)(
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN EFI_BROWSER_ACTION Action,
IN EFI_QUESTION_ID QuestionId,
IN UINT8 Type,
IN OUT EFI_IFR_TYPE_VALUE *Value,
OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest
)
;
///
/// This protocol provides a callable interface between the HII and
/// drivers. Only drivers which provide IFR data to HII are required
/// to publish this protocol.
///
struct _EFI_HII_CONFIG_ACCESS_PROTOCOL {
EFI_HII_ACCESS_EXTRACT_CONFIG ExtractConfig;
EFI_HII_ACCESS_ROUTE_CONFIG RouteConfig;
EFI_HII_ACCESS_FORM_CALLBACK Callback;
};
extern EFI_GUID gEfiHiiConfigAccessProtocolGuid;
#endif