MdePkg/Include/Protocol/HiiConfigRouting.h

   1 /** @file
   2   The file provides services to manage the movement of
   3   configuration data from drivers to configuration applications.
   4   It then serves as the single point to receive configuration
   5   information from configuration applications, routing the
   6   results to the appropriate drivers.
   7
   8   Copyright (c) 2006 - 2009, Intel Corporation
   9   All rights reserved. This program and the accompanying materials
  10   are licensed and made available under the terms and conditions of the BSD License
  11   which accompanies this distribution.  The full text of the license may be found at
  12   http://opensource.org/licenses/bsd-license.php
  13
  14   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16
  17 **/
  18
  19 #ifndef __HII_CONFIG_ROUTING_H__
  20 #define __HII_CONFIG_ROUTING_H__
  21
  22 #define EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID \
  23   { 0x587e72d7, 0xcc50, 0x4f79, { 0x82, 0x09, 0xca, 0x29, 0x1f, 0xc1, 0xa1, 0x0f } }
  24
  25
  26 typedef struct _EFI_HII_CONFIG_ROUTING_PROTOCOL EFI_HII_CONFIG_ROUTING_PROTOCOL;
  27
  28 /**
  29
  30   This function allows the caller to request the current
  31   configuration for one or more named elements from one or more
  32   drivers. The resulting string is in the standard HII
  33   configuration string format. If Successful Results contains an
  34   equivalent string with "=" and the values associated with all
  35   names added in. The expected implementation is for each
  36   <ConfigRequest> substring in the Request, call the HII
  37   Configuration Routing Protocol ExtractProtocol function for the
  38   driver corresponding to the <ConfigHdr> at the start of the
  39   <ConfigRequest> substring. The request fails if no driver
  40   matches the <ConfigRequest> substring. Note: Alternative
  41   configuration strings may also be appended to the end of the
  42   current configuration string. If they are, they must appear
  43   after the current configuration. They must contain the same
  44   routing (GUID, NAME, PATH) as the current configuration string.
  45   They must have an additional description indicating the type of
  46   alternative configuration the string represents,
  47   "ALTCFG=<StringToken>". That <StringToken> (when converted from
  48   hexadecimal (encoded as text) to binary) is a reference to a string in the
  49   associated string pack. As an example, assume that the Request
  50   string is:
  51   GUID=...&NAME=00480050&PATH=...&Fred&George&Ron&Neville A result
  52   might be:
  53   GUID=...&NAME=00480050&PATH=...&Fred=16&George=16&Ron=12&Neville=11&
  54   GUID=...&NAME=00480050&PATH=...&ALTCFG=0037&Fred=12&Neville=7
  55
  56   @param This       Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL
  57                     instance.
  58
  59   @param Request    A null-terminated string in <MultiConfigRequest>
  60                     format. If a NULL is passed in for the Request field,
  61                     all of the settings being abstracted by this function
  62                     will be returned in the Results field.
  63
  64   @param Progress   On return, points to a character in the
  65                     Request string. Points to the string's null
  66                     terminator if request was successful. Points
  67                     to the most recent '&' before the first
  68                     failing name / value pair (or the beginning
  69                     of the string if the failure is in the first
  70                     name / value pair) if the request was not
  71                     successful
  72
  73   @param Results    A null-terminated string in <ConfigAltResp> format
  74                     which has all values filled in for the names in the
  75                     Request string. If the Request string was NULL, the data
  76                     returned is in <MultiConfigAltResp> format. String to be
  77                     allocated by the called function.
  78
  79   @retval EFI_SUCCESS             The Results string is filled with the
  80                                   values corresponding to all requested
  81                                   names.
  82
  83   @retval EFI_OUT_OF_RESOURCES    Not enough memory to store the
  84                                   parts of the results that must be
  85                                   stored awaiting possible future
  86                                   protocols.
  87
  88   @retval EFI_INVALID_PARAMETER   For example, passing in a NULL
  89                                   for the Request parameter
  90                                   would result in this type of
  91                                   error. The Progress parameter
  92                                   is set to NULL.
  93
  94   @retval EFI_NOT_FOUND           Routing data doesn't match any
  95                                   known driver. Progress set to
  96                                   the "G" in "GUID" of the
  97                                   routing header that doesn't
  98                                   match. Note: There is no
  99                                   requirement that all routing
 100                                   data be validated before any
 101                                   configuration extraction.
 102
 103   @retval EFI_INVALID_PARAMETER   Illegal syntax. Progress set
 104                                   to most recent & before the
 105                                   error or the beginning of the
 106                                   string.
 107   @retval EFI_INVALID_PARAMETER   Unknown name.
 108
 109
 110 **/
 111 typedef
 112 EFI_STATUS
 113 (EFIAPI * EFI_HII_EXTRACT_CONFIG)(
 114   IN CONST  EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
 115   IN CONST  EFI_STRING                      Request,
 116   OUT       EFI_STRING                      *Progress,
 117   OUT       EFI_STRING                      *Results
 118 );
 119
 120 /**
 121   This function allows the caller to request the current configuration
 122   for the entirety of the current HII database and returns the data in
 123   a null-terminated string.
 124
 125   This function allows the caller to request the current
 126   configuration for all of the current HII database. The results
 127   include both the current and alternate configurations as
 128   described in ExtractConfig() above.
 129
 130   @param This     Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
 131
 132   @param Results  A null-terminated string in <MultiConfigAltResp>
 133                   format which has all values filled in for the
 134                   names in the Request string.
 135                   String to be allocated by this function.
 136                   De-allocation is up to the caller.
 137
 138   @retval EFI_SUCCESS             The Results string is filled with the
 139                                   values corresponding to all requested
 140                                   names.
 141
 142   @retval EFI_OUT_OF_RESOURCES    Not enough memory to store the
 143                                   parts of the results that must be
 144                                   stored awaiting possible future
 145                                   protocols.
 146
 147   @retval EFI_INVALID_PARAMETERS  For example, passing in a NULL
 148                                   for the Results parameter
 149                                   would result in this type of
 150                                   error.
 151
 152 **/
 153 typedef
 154 EFI_STATUS
 155 (EFIAPI * EFI_HII_EXPORT_CONFIG)(
 156   IN CONST  EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
 157   OUT       EFI_STRING                      *Results
 158 );
 159
 160 /**
 161
 162   This function routes the results of processing forms to the
 163   appropriate targets. It scans for <ConfigHdr> within the string
 164   and passes the header and subsequent body to the driver whose
 165   location is described in the <ConfigHdr>. Many <ConfigHdr>s may
 166   appear as a single request. The expected implementation is to
 167   hand off the various <ConfigResp> substrings to the
 168   Configuration Access Protocol RouteConfig routine corresponding
 169   to the driver whose routing information is defined by the
 170   <ConfigHdr> in turn.
 171
 172   @param This           Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
 173
 174   @param Configuration  A null-terminated string in <MulltiConfigResp> format.
 175
 176   @param Progress       A pointer to a string filled in with the
 177                         offset of the most recent '&' before the
 178                         first failing name / value pair (or the
 179                         beginning of the string if the failure is in
 180                         the first name / value pair) or the
 181                         terminating NULL if all was successful.
 182
 183   @retval EFI_SUCCESS             The results have been distributed or are
 184                                   awaiting distribution.
 185
 186   @retval EFI_OUT_OF_RESOURCES    Not enough memory to store the
 187                                   parts of the results that must be
 188                                   stored awaiting possible future
 189                                   protocols.
 190
 191   @retval EFI_INVALID_PARAMETERS  Passing in a NULL for the
 192                                   Results parameter would result
 193                                   in this type of error.
 194
 195   @retval EFI_NOT_FOUND           Target for the specified routing data
 196                                   was not found
 197
 198 **/
 199 typedef
 200 EFI_STATUS
 201 (EFIAPI * EFI_HII_ROUTE_CONFIG)(
 202   IN CONST  EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
 203   IN CONST  EFI_STRING                      Configuration,
 204   OUT       EFI_STRING                      *Progress
 205 );
 206
 207
 208 /**
 209
 210   This function extracts the current configuration from a block of
 211   bytes. To do so, it requires that the ConfigRequest string
 212   consists of a list of <BlockName> formatted names. It uses the
 213   offset in the name to determine the index into the Block to
 214   start the extraction and the width of each name to determine the
 215   number of bytes to extract. These are mapped to a string
 216   using the equivalent of the C "%x" format (with optional leading
 217   spaces). The call fails if, for any (offset, width) pair in
 218   ConfigRequest, offset+value >= BlockSize.
 219
 220   @param This      Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
 221
 222   @param ConfigRequest  A null-terminated string in <ConfigRequest> format.
 223
 224   @param Block      Array of bytes defining the block's
 225                     configuration.
 226
 227   @param BlockSize  Length in bytes of Block.
 228
 229   @param Config     Filled-in configuration string. String
 230                     allocated by the function. Returned only if
 231                     call is successful.
 232
 233   @param Progress   A pointer to a string filled in with the
 234                     offset of the most recent '&' before the
 235                     first failing name / value pair (or the
 236                     beginning of the string if the failure is in
 237                     the first name / value pair) or the
 238                     terminating NULL if all was successful.
 239
 240   @retval EFI_SUCCESS             The request succeeded. Progress points
 241                                   to the null terminator at the end of the
 242                                   ConfigRequest string.
 243
 244   @retval EFI_OUT_OF_RESOURCES    Not enough memory to allocate
 245                                   Config. Progress points to the
 246                                   first character of ConfigRequest.
 247
 248   @retval EFI_INVALID_PARAMETERS  Passing in a NULL for the
 249                                   ConfigRequest or Block
 250                                   parameter would result in this
 251                                   type of error. Progress points
 252                                   to the first character of
 253                                   ConfigRequest.
 254
 255   @retval EFI_NOT_FOUND           Target for the specified routing data
 256                                   was not found. Progress points to the
 257                                   'G' in "GUID" of the errant routing
 258                                   data.
 259   @retval EFI_DEVICE_ERROR        Block not large enough. Progress undefined.
 260
 261   @retval EFI_INVALID_PARAMETER   Encountered non <BlockName>
 262                                   formatted string. Block is
 263                                   left updated and Progress
 264                                   points at the '&' preceding
 265                                   the first non-<BlockName>.
 266
 267 **/
 268 typedef
 269 EFI_STATUS
 270 (EFIAPI * EFI_HII_BLOCK_TO_CONFIG)(
 271   IN CONST  EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
 272   IN CONST  EFI_STRING                      ConfigRequest,
 273   IN CONST  UINT8                           *Block,
 274   IN CONST  UINTN                           BlockSize,
 275   OUT       EFI_STRING                      *Config,
 276   OUT       EFI_STRING                      *Progress
 277 );
 278
 279
 280
 281 /**
 282   This function maps a configuration containing a series of
 283   <BlockConfig> formatted name value pairs in ConfigResp into a
 284   Block so it may be stored in a linear mapped storage such as a
 285   UEFI Variable. If present, the function skips GUID, NAME, and
 286   PATH in <ConfigResp>. It stops when it finds a non-<BlockConfig>
 287   name / value pair (after skipping the routing header) or when it
 288   reaches the end of the string.
 289   Example Assume an existing block containing: 00 01 02 03 04 05
 290   And the ConfigResp string is:
 291   OFFSET=4&WIDTH=1&VALUE=7&OFFSET=0&WIDTH=2&VALUE=AA55
 292   The results are
 293   55 AA 02 07 04 05
 294
 295   @param This           Points to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
 296
 297   @param ConfigResp     A null-terminated string in <ConfigResp> format.
 298
 299   @param Block          A possibly null array of bytes
 300                         representing the current block. Only
 301                         bytes referenced in the ConfigResp
 302                         string in the block are modified. If
 303                         this parameter is null or if the
 304                         BlockLength parameter is (on input)
 305                         shorter than required by the
 306                         Configuration string, only the BlockSize
 307                         parameter is updated and an appropriate
 308                         status (see below) is returned.
 309
 310   @param BlockSize      The length of the Block in units of UINT8.
 311                         On input, this is the size of the Block. On
 312                         output, if successful, contains the index of
 313                         the last modified byte in the Block.
 314
 315   @param Progress       On return, points to an element of the
 316                         ConfigResp string filled in with the offset
 317                         of the most recent "&" before the first
 318                         failing name / value pair (or the beginning
 319                         of the string if the failure is in the first
 320                         name / value pair) or the terminating NULL
 321                         if all was successful.
 322
 323   @retval EFI_SUCCESS            The request succeeded. Progress points to the null
 324                                  terminator at the end of the ConfigResp string.
 325   @retval EFI_OUT_OF_RESOURCES   Not enough memory to allocate Config. Progress
 326                                  points to the first character of ConfigResp.
 327   @retval EFI_INVALID_PARAMETER  Passing in a NULL for the ConfigResp or
 328                                  Block parameter would result in this type of
 329                                  error. Progress points to the first character of
 330                                          ConfigResp.
 331   @retval EFI_INVALID_PARAMETER  Encountered non <BlockName> formatted name /
 332                                  value pair. Block is left updated and
 333                                  Progress points at the '&' preceding the first
 334                                  non-<BlockName>.
 335
 336 **/
 337 typedef
 338 EFI_STATUS
 339 (EFIAPI * EFI_HII_CONFIG_TO_BLOCK)(
 340   IN CONST  EFI_HII_CONFIG_ROUTING_PROTOCOL *This,
 341   IN CONST  EFI_STRING                      ConfigResp,
 342   IN OUT    UINT8                           *Block,
 343   IN OUT    UINTN                           *BlockSize,
 344   OUT       EFI_STRING                      *Progress
 345 );
 346
 347 /**
 348   This helper function is to be called by drivers to extract portions of
 349   a larger configuration string.
 350
 351   @param This              A pointer to the EFI_HII_CONFIG_ROUTING_PROTOCOL instance.
 352   @param Configuration     A null-terminated string in <MultiConfigAltResp> format.
 353   @param Guid              A pointer to the GUID value to search for in the
 354                            routing portion of the ConfigResp string when retrieving
 355                            the requested data. If Guid is NULL, then all GUID
 356                            values will be searched for.
 357   @param Name              A pointer to the NAME value to search for in the
 358                            routing portion of the ConfigResp string when retrieving
 359                            the requested data. If Name is NULL, then all Name
 360                            values will be searched for.
 361   @param DevicePath        A pointer to the PATH value to search for in the
 362                            routing portion of the ConfigResp string when retrieving
 363                            the requested data. If DevicePath is NULL, then all
 364                            DevicePath values will be searched for.
 365   @param AltCfgId          A pointer to the ALTCFG value to search for in the
 366                            routing portion of the ConfigResp string when retrieving
 367                            the requested data.  If this parameter is NULL,
 368                            then the current setting will be retrieved.
 369   @param AltCfgResp        A pointer to a buffer which will be allocated by the
 370                            function which contains the retrieved string as requested.
 371                            This buffer is only allocated if the call was successful.
 372
 373   @retval EFI_SUCCESS             The request succeeded. The requested data was extracted
 374                                   and placed in the newly allocated AltCfgResp buffer.
 375   @retval EFI_OUT_OF_RESOURCES    Not enough memory to allocate AltCfgResp.
 376   @retval EFI_INVALID_PARAMETER   Any parameter is invalid.
 377   @retval EFI_NOT_FOUND           Target for the specified routing data was not found.
 378 **/
 379 typedef
 380 EFI_STATUS
 381 (EFIAPI * EFI_HII_GET_ALT_CFG)(
 382   IN  CONST EFI_HII_CONFIG_ROUTING_PROTOCOL    *This,
 383   IN  CONST EFI_STRING                         Configuration,
 384   IN  CONST EFI_GUID                           *Guid,
 385   IN  CONST EFI_STRING                         Name,
 386   IN  CONST EFI_DEVICE_PATH_PROTOCOL           *DevicePath,
 387   IN  CONST UINT16                             *AltCfgId,
 388   OUT EFI_STRING                               *AltCfgResp
 389   );
 390
 391 ///
 392 /// This protocol defines the configuration routing interfaces
 393 /// between external applications and the HII. There may only be one
 394 /// instance of this protocol in the system.
 395 ///
 396 struct _EFI_HII_CONFIG_ROUTING_PROTOCOL {
 397   EFI_HII_EXTRACT_CONFIG  ExtractConfig;
 398   EFI_HII_EXPORT_CONFIG   ExportConfig;
 399   EFI_HII_ROUTE_CONFIG    RouteConfig;
 400   EFI_HII_BLOCK_TO_CONFIG BlockToConfig;
 401   EFI_HII_CONFIG_TO_BLOCK ConfigToBlock;
 402   EFI_HII_GET_ALT_CFG     GetAltConfig;
 403 };
 404
 405 extern EFI_GUID gEfiHiiConfigRoutingProtocolGuid;
 406
 407
 408 #endif
 409