MdePkg/Include/Protocol/HiiConfigAccess.h - third_party/edk2 - Git at Google

 /** @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 - 2009, 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
   which 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_HII_CONFIG_ACCESS_H__
 #define __EFI_HII_CONFIG_ACCESS_H__

 #include <Protocol/FormBrowser2.h>

 #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

 /**

   This function allows the caller to request the current
   configuration for one or more named elements. The resulting
   string is in <ConfigAltResp> 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=<StringToken>". That <StringToken> (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
                     <ConfigRequest> 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
                     <MultiConfigRequest> format.

   @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
                     <ConfigAltResp> 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_INVALID_PARAMETER   For example, passing in a NULL
                                   for the Request parameter
                                   would result in this type of
                                   error. In this case, the
                                   Progress parameter would be
                                   set to NULL.

   @retval EFI_NOT_FOUND           Routing data doesn't match any
                                   known driver. Progress set to the
                                   first character in the routing header.
                                   Note: There is no requirement that the
                                   driver validate the routing data. It
                                   must skip the <ConfigHdr> in order to
                                   process the names.

   @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.

 **/
 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 <BlockConfig>
   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
                         <ConfigString> 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  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
	/** @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 - 2009, 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
	which 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_HII_CONFIG_ACCESS_H__
	#define __EFI_HII_CONFIG_ACCESS_H__

	#include <Protocol/FormBrowser2.h>

	#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

	/**

	This function allows the caller to request the current
	configuration for one or more named elements. The resulting
	string is in <ConfigAltResp> 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=<StringToken>". That <StringToken> (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
	<ConfigRequest> 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
	<MultiConfigRequest> format.

	@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
	<ConfigAltResp> 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_INVALID_PARAMETER For example, passing in a NULL
	for the Request parameter
	would result in this type of
	error. In this case, the
	Progress parameter would be
	set to NULL.

	@retval EFI_NOT_FOUND Routing data doesn't match any
	known driver. Progress set to the
	first character in the routing header.
	Note: There is no requirement that the
	driver validate the routing data. It
	must skip the <ConfigHdr> in order to
	process the names.

	@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.

	**/
	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 <BlockConfig>
	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
	<ConfigString> 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 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