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418 lines
19 KiB
C
418 lines
19 KiB
C
/** @file
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The file provides services to manage the movement of
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configuration data from drivers to configuration applications.
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It then serves as the single point to receive configuration
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information from configuration applications, routing the
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results to the appropriate drivers.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol was introduced in UEFI Specification 2.1.
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**/
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#ifndef __HII_CONFIG_ROUTING_H__
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#define __HII_CONFIG_ROUTING_H__
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#define EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID \
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{ 0x587e72d7, 0xcc50, 0x4f79, { 0x82, 0x09, 0xca, 0x29, 0x1f, 0xc1, 0xa1, 0x0f } }
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typedef struct _EFI_HII_CONFIG_ROUTING_PROTOCOL EFI_HII_CONFIG_ROUTING_PROTOCOL;
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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 from one or more
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drivers. The resulting string is in the standard HII
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configuration string format. If Successful, Results contains an
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equivalent string with "=" and the values associated with all
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names added in. The expected implementation is for each
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<ConfigRequest> substring in the Request to call the HII
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Configuration Routing Protocol ExtractProtocol function for the
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driver corresponding to the <ConfigHdr> at the start of the
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<ConfigRequest> substring. The request fails if no driver
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matches the <ConfigRequest> substring. Note: Alternative
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configuration strings may 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 converted from
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hexadecimal (encoded as text) to binary) is a reference to a string in the
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associated string pack. As an example, assume that the Request
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string is:
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GUID=...&NAME=00480050&PATH=...&Fred&George&Ron&Neville A result
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might be:
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GUID=...&NAME=00480050&PATH=...&Fred=16&George=16&Ron=12&Neville=11&
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GUID=...&NAME=00480050&PATH=...&ALTCFG=0037&Fred=12&Neville=7
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@param This Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL
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instance.
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@param Request A null-terminated string in <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 the 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 string in <MultiConfigAltResp> format
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which has all values filled in for the names in the
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Request string.
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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. The Progress parameter
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is 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
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the "G" in "GUID" of the
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routing header that doesn't
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match. Note: There is no
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requirement that all routing
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data be validated before any
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configuration extraction.
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@retval EFI_INVALID_PARAMETER Illegal syntax. Progress set
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to the 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 The ExtractConfig function of the
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underlying HII Configuration
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Access Protocol returned
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EFI_INVALID_PARAMETER. Progress
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set to most recent & before the
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error or the beginning of the
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string.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_EXTRACT_CONFIG)(
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IN CONST EFI_HII_CONFIG_ROUTING_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 allows the caller to request the current configuration
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for the entirety of the current HII database and returns the data in
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a null-terminated string.
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This function allows the caller to request the current
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configuration for all of the current HII database. The results
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include both the current and alternate configurations as
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described in ExtractConfig() above.
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@param This Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
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@param Results Null-terminated Unicode string in
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<MultiConfigAltResp> format which has all values
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filled in for the entirety of the current HII
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database. String to be allocated by the called
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function. De-allocation is up to the caller.
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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_PARAMETERS For example, passing in a NULL
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for the Results parameter
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would result in this type of
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error.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_EXPORT_CONFIG)(
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IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
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OUT EFI_STRING *Results
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);
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/**
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This function routes the results of processing forms to the
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appropriate targets. It scans for <ConfigHdr> within the string
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and passes the header and subsequent body to the driver whose
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location is described in the <ConfigHdr>. Many <ConfigHdr>s may
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appear as a single request. The expected implementation is to
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hand off the various <ConfigResp> substrings to the
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Configuration Access Protocol RouteConfig routine corresponding
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to the driver whose routing information is defined by the
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<ConfigHdr> in turn.
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@param This Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
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@param Configuration A null-terminated string in <MulltiConfigResp> 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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beginning of the string if the failure is in
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the first name / value pair), or the
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terminating NULL if all was 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 The 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_ROUTE_CONFIG)(
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IN CONST EFI_HII_CONFIG_ROUTING_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 extracts the current configuration from a block of
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bytes. To do so, it requires that the ConfigRequest string
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consists of a list of <BlockName> formatted names. It uses the
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offset in the name to determine the index into the Block to
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start the extraction and the width of each name to determine the
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number of bytes to extract. These are mapped to a string
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using the equivalent of the C "%x" format (with optional leading
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spaces). The call fails if, for any (offset, width) pair in
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ConfigRequest, offset+value >= BlockSize.
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@param This Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
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@param ConfigRequest A null-terminated string in <ConfigRequest> format.
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@param Block An array of bytes defining the block's
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configuration.
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@param BlockSize The length in bytes of Block.
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@param Config The filled-in configuration string. String
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allocated by the function. Returned only if
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call is successful. The null-terminated string
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will be <ConfigResp> 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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beginning of the string if the failure is in
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the first name / value pair), or the
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terminating NULL if all was successful.
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@retval EFI_SUCCESS The request succeeded. Progress points
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to the null terminator at the end of the
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ConfigRequest string.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate
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Config. Progress points to the
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first character of ConfigRequest.
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@retval EFI_INVALID_PARAMETERS Passing in a NULL for the
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ConfigRequest or Block
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parameter would result in this
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type of error. Progress points
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to the first character of
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ConfigRequest.
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@retval EFI_NOT_FOUND The target for the specified routing data
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was not found. Progress points to the
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'G' in "GUID" of the errant routing
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data.
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@retval EFI_DEVICE_ERROR The block is not large enough. Progress undefined.
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@retval EFI_INVALID_PARAMETER Encountered non <BlockName>
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formatted string. Block is
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left updated and Progress
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points at the '&' preceding
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the first non-<BlockName>.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_BLOCK_TO_CONFIG)(
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IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
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IN CONST EFI_STRING ConfigRequest,
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IN CONST UINT8 *Block,
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IN CONST UINTN BlockSize,
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OUT EFI_STRING *Config,
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OUT EFI_STRING *Progress
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);
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/**
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This function maps a configuration containing a series of
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<BlockConfig> formatted name value pairs in ConfigResp into a
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Block so it may be stored in a linear mapped storage such as a
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UEFI Variable. If present, the function skips GUID, NAME, and
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PATH in <ConfigResp>. It stops when it finds a non-<BlockConfig>
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name / value pair (after skipping the routing header) or when it
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reaches the end of the string.
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Example Assume an existing block containing: 00 01 02 03 04 05
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And the ConfigResp string is:
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OFFSET=4&WIDTH=1&VALUE=7&OFFSET=0&WIDTH=2&VALUE=AA55
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The results are
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55 AA 02 07 04 05
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@param This Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
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@param ConfigResp A null-terminated string in <ConfigResp> format.
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@param Block A possibly null array of bytes
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representing the current block. Only
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bytes referenced in the ConfigResp
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string in the block are modified. If
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this parameter is null or if the
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BlockLength parameter is (on input)
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shorter than required by the
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Configuration string, only the BlockSize
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parameter is updated, and an appropriate
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status (see below) is returned.
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@param BlockSize The length of the Block in units of UINT8.
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On input, this is the size of the Block. On
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output, if successful, contains the largest
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index of the modified byte in the Block, or
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the required buffer size if the Block is not
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large enough.
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@param Progress On return, points to an element of the
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ConfigResp string filled in with the offset
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of 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), or the terminating NULL
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if all was successful.
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@retval EFI_SUCCESS The request succeeded. Progress points to the null
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terminator at the end of the ConfigResp string.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate Config. Progress
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points to the first character of ConfigResp.
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@retval EFI_INVALID_PARAMETER Passing in a NULL for the ConfigResp or
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Block parameter would result in this type of
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error. Progress points to the first character of
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ConfigResp.
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@retval EFI_INVALID_PARAMETER Encountered non <BlockName> formatted name /
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value pair. Block is left updated and
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Progress points at the '&' preceding the first
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non-<BlockName>.
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@retval EFI_DEVICE_ERROR Block not large enough. Progress undefined.
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@retval EFI_NOT_FOUND Target for the specified routing data was not found.
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Progress points to the "G" in "GUID" of the errant
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routing data.
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@retval EFI_BUFFER_TOO_SMALL Block not large enough. Progress undefined.
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BlockSize is updated with the required buffer size.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EFI_HII_CONFIG_TO_BLOCK)(
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IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
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IN CONST EFI_STRING ConfigResp,
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IN OUT UINT8 *Block,
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IN OUT UINTN *BlockSize,
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OUT EFI_STRING *Progress
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);
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/**
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This helper function is to be called by drivers to extract portions of
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a larger configuration string.
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@param This A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
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@param ConfigResp A null-terminated string in <ConfigAltResp> format.
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@param Guid A pointer to the GUID value to search for in the
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routing portion of the ConfigResp string when retrieving
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the requested data. If Guid is NULL, then all GUID
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values will be searched for.
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@param Name A pointer to the NAME value to search for in the
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routing portion of the ConfigResp string when retrieving
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the requested data. If Name is NULL, then all Name
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values will be searched for.
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@param DevicePath A pointer to the PATH value to search for in the
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routing portion of the ConfigResp string when retrieving
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the requested data. If DevicePath is NULL, then all
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DevicePath values will be searched for.
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@param AltCfgId A pointer to the ALTCFG value to search for in the
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routing portion of the ConfigResp string when retrieving
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the requested data. If this parameter is NULL,
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then the current setting will be retrieved.
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@param AltCfgResp A pointer to a buffer which will be allocated by the
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function which contains the retrieved string as requested.
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This buffer is only allocated if the call was successful.
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The null-terminated string will be <ConfigResp> format.
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@retval EFI_SUCCESS The request succeeded. The requested data was extracted
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and placed in the newly allocated AltCfgResp buffer.
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@retval EFI_OUT_OF_RESOURCES Not enough memory to allocate AltCfgResp.
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@retval EFI_INVALID_PARAMETER Any parameter is invalid.
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@retval EFI_NOT_FOUND The target for the specified routing data 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_GET_ALT_CFG)(
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IN CONST EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
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IN CONST EFI_STRING ConfigResp,
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IN CONST EFI_GUID *Guid,
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IN CONST EFI_STRING Name,
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IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
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IN CONST UINT16 *AltCfgId,
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OUT EFI_STRING *AltCfgResp
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);
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///
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/// This protocol defines the configuration routing interfaces
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/// between external applications and the HII. There may only be one
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/// instance of this protocol in the system.
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///
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struct _EFI_HII_CONFIG_ROUTING_PROTOCOL {
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EFI_HII_EXTRACT_CONFIG ExtractConfig;
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EFI_HII_EXPORT_CONFIG ExportConfig;
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EFI_HII_ROUTE_CONFIG RouteConfig;
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EFI_HII_BLOCK_TO_CONFIG BlockToConfig;
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EFI_HII_CONFIG_TO_BLOCK ConfigToBlock;
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EFI_HII_GET_ALT_CFG GetAltConfig;
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};
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extern EFI_GUID gEfiHiiConfigRoutingProtocolGuid;
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#endif
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