mirror of https://github.com/acidanthera/audk.git
221 lines
9.5 KiB
C
221 lines
9.5 KiB
C
/** @file
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The EFI HII results processing protocol invokes this type of protocol
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when it needs to forward results to a driver's configuration handler.
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This protocol is published by drivers providing and requesting
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configuration data from HII. It may only be invoked by HII.
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Copyright (c) 2006 - 2009, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __EFI_HII_CONFIG_ACCESS_H__
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#define __EFI_HII_CONFIG_ACCESS_H__
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#include <Protocol/FormBrowser2.h>
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#define EFI_HII_CONFIG_ACCESS_PROTOCOL_GUID \
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{ 0x330d4706, 0xf2a0, 0x4e4f, { 0xa3, 0x69, 0xb6, 0x6f, 0xa8, 0xd5, 0x43, 0x85 } }
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typedef struct _EFI_HII_CONFIG_ACCESS_PROTOCOL EFI_HII_CONFIG_ACCESS_PROTOCOL;
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typedef UINTN EFI_BROWSER_ACTION;
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#define EFI_BROWSER_ACTION_CHANGING 0
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#define EFI_BROWSER_ACTION_CHANGED 1
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#define EFI_BROWSER_ACTION_RETRIEVE 2
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#define EFI_BROWSER_ACTION_FORM_OPEN 3
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#define EFI_BROWSER_ACTION_FORM_CLOSE 4
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/**
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This function allows the caller to request the current
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configuration for one or more named elements. The resulting
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string is in <ConfigAltResp> format. Any and all alternative
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configuration strings shall also be appended to the end of the
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current configuration string. If they are, they must appear
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after the current configuration. They must contain the same
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routing (GUID, NAME, PATH) as the current configuration string.
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They must have an additional description indicating the type of
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alternative configuration the string represents,
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"ALTCFG=<StringToken>". That <StringToken> (when
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converted from Hex UNICODE to binary) is a reference to a
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string in the associated string pack.
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@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
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@param Request A null-terminated Unicode string in
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<ConfigRequest> format. Note that this
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includes the routing information as well as
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the configurable name / value pairs. It is
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invalid for this string to be in
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<MultiConfigRequest> format.
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@param Progress On return, points to a character in the
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Request string. Points to the string's null
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terminator if request was successful. Points
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to the most recent "&" before the first
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failing name / value pair (or the beginning
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of the string if the failure is in the first
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name / value pair) if the request was not
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successful
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@param Results A null-terminated Unicode string in
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<ConfigAltResp> format which has all values
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filled in for the names in the Request string.
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String to be allocated by the called function.
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@retval EFI_SUCCESS The Results string is filled with the
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values corresponding to all requested
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names.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to store the
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parts of the results that must be
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stored awaiting possible future
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protocols.
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@retval EFI_INVALID_PARAMETER For example, passing in a NULL
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for the Request parameter
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would result in this type of
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error. In this case, the
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Progress parameter would be
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set to NULL.
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@retval EFI_NOT_FOUND Routing data doesn't match any
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known driver. Progress set to the
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first character in the routing header.
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Note: There is no requirement that the
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driver validate the routing data. It
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must skip the <ConfigHdr> in order to
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process the names.
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@retval EFI_INVALID_PARAMETER Illegal syntax. Progress set
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to most recent "&" before the
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error or the beginning of the
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string.
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@retval EFI_INVALID_PARAMETER Unknown name. Progress points
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to the & before the name in
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question.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_ACCESS_EXTRACT_CONFIG)(
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IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
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IN CONST EFI_STRING Request,
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OUT EFI_STRING *Progress,
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OUT EFI_STRING *Results
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);
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/**
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This function applies changes in a driver's configuration.
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Input is a Configuration, which has the routing data for this
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driver followed by name / value configuration pairs. The driver
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must apply those pairs to its configurable storage. If the
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driver's configuration is stored in a linear block of data
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and the driver's name / value pairs are in <BlockConfig>
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format, it may use the ConfigToBlock helper function (above) to
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simplify the job.
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@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
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@param Configuration A null-terminated Unicode string in
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<ConfigString> format.
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@param Progress A pointer to a string filled in with the
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offset of the most recent '&' before the
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first failing name / value pair (or the
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beginn ing of the string if the failure
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is in the first name / value pair) or
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the terminating NULL if all was
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successful.
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@retval EFI_SUCCESS The results have been distributed or are
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awaiting distribution.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to store the
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parts of the results that must be
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stored awaiting possible future
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protocols.
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@retval EFI_INVALID_PARAMETERS Passing in a NULL for the
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Results parameter would result
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in this type of error.
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@retval EFI_NOT_FOUND Target for the specified routing data
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was not found
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_ACCESS_ROUTE_CONFIG)(
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IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
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IN CONST EFI_STRING Configuration,
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OUT EFI_STRING *Progress
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);
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/**
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This function is called to provide results data to the driver.
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This data consists of a unique key that is used to identify
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which data is either being passed back or being asked for.
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@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
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@param Action Specifies the type of action taken by the browser.
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@param QuestionId A unique value which is sent to the original
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exporting driver so that it can identify the type
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of data to expect. The format of the data tends to
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vary based on the opcode that generated the callback.
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@param Type The type of value for the question.
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@param Value A pointer to the data being sent to the original
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exporting driver.
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@param ActionRequest On return, points to the action requested by the
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callback function.
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@retval EFI_SUCCESS The callback successfully handled the action.
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@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the
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variable and its data.
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@retval EFI_DEVICE_ERROR The variable could not be saved.
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@retval EFI_UNSUPPORTED The specified Action is not supported by the
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callback.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_HII_ACCESS_FORM_CALLBACK)(
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IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
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IN EFI_BROWSER_ACTION Action,
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IN EFI_QUESTION_ID QuestionId,
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IN UINT8 Type,
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IN OUT EFI_IFR_TYPE_VALUE *Value,
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OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest
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)
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;
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///
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/// This protocol provides a callable interface between the HII and
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/// drivers. Only drivers which provide IFR data to HII are required
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/// to publish this protocol.
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///
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struct _EFI_HII_CONFIG_ACCESS_PROTOCOL {
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EFI_HII_ACCESS_EXTRACT_CONFIG ExtractConfig;
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EFI_HII_ACCESS_ROUTE_CONFIG RouteConfig;
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EFI_HII_ACCESS_FORM_CALLBACK Callback;
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} ;
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extern EFI_GUID gEfiHiiConfigAccessProtocolGuid;
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#endif
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