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/** @file
The file provides services to forward results to PCOL-based
handler if EFI HII results processing protocol invokes this
protocol.
Copyright (c) 2006 - 2007, 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__
#define EFI_HII_CONFIGURATION_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;
/**
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_MEMORY 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. 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_MEMORY 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 KeyValue 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 Data A pointer to the data being sent to the original
exporting driver. The format of the data should
be the same as that of the question invoking the
callback and will be known to the recipient.
@retval EFI_SUCCESS The firmware has successfully stored the
variable and its data as defined by the
Attributes.
@retval EFI_INVALID_PARAMETER An invalid combination of
Attributes bits was supplied,
or the DataSize exceeds the
maximum allowed.
@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 due
to a hardware failure.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FORM_CALLBACK) (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST UINT16 KeyValue,
IN CONST VOID *Data
);
/**
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.
@param ExtractConfig This function breaks apart the UNICODE
request strings routing them to the
appropriate drivers. This function is
analogous to the similarly named
function in the HII Routing Protocol.
@param RouteConfig This function breaks apart the UNICODE
results strings and returns configuration
information as specified by the request.
@param Callback This function is called from the
configuration browser to communicate certain
activities that were initiated by a user.
**/
struct _EFI_HII_CONFIG_ACCESS_PROTOCOL {
EFI_HII_ACCESS_ROUTE_CONFIG ExtractConfig;
EFI_HII_ACCESS_EXTRACT_CONFIG RouteConfig;
EFI_FORM_CALLBACK Callback;
} ;
extern EFI_GUID gEfiHiiConfigAccessProtocolGuid;
#endif
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