MdeModulePkg/Universal/PlatformDriOverrideDxe/PlatDriOverrideDxe.c

   1 /** @file
   2   This file also installs UEFI PLATFORM_DRIVER_OVERRIDE_PROTOCOL.
   3
   4   The main code offers a UI interface in device manager to let user configure
   5   platform override protocol to override the default algorithm for matching
   6   drivers to controllers.
   7
   8   The main flow:
   9   1. It dynamicly locate all controller device path.
  10   2. It dynamicly locate all drivers which support binding protocol.
  11   3. It export and dynamicly update two menu to let user select the
  12      mapping between drivers to controllers.
  13   4. It save all the mapping info in NV variables which will be consumed
  14      by platform override protocol driver to publish the platform override protocol.
  15
  16 Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>
  17 This program and the accompanying materials
  18 are licensed and made available under the terms and conditions of the BSD License
  19 which accompanies this distribution.  The full text of the license may be found at
  20 http://opensource.org/licenses/bsd-license.php
  21
  22 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  23 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  24
  25 **/
  26
  27 #include "InternalPlatDriOverrideDxe.h"
  28 #include "PlatOverMngr.h"
  29
  30 #define EFI_CALLBACK_INFO_SIGNATURE SIGNATURE_32 ('C', 'l', 'b', 'k')
  31 #define EFI_CALLBACK_INFO_FROM_THIS(a)  CR (a, EFI_CALLBACK_INFO, ConfigAccess, EFI_CALLBACK_INFO_SIGNATURE)
  32
  33 typedef struct {
  34   UINTN                           Signature;
  35   EFI_HANDLE                      DriverHandle;
  36   EFI_HII_HANDLE                  RegisteredHandle;
  37   PLAT_OVER_MNGR_DATA             FakeNvData;
  38   EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
  39   EFI_HII_CONFIG_ACCESS_PROTOCOL  ConfigAccess;
  40   EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL PlatformDriverOverride;
  41 } EFI_CALLBACK_INFO;
  42
  43 #pragma pack(1)
  44
  45 ///
  46 /// HII specific Vendor Device Path definition.
  47 ///
  48 typedef struct {
  49   VENDOR_DEVICE_PATH             VendorDevicePath;
  50   EFI_DEVICE_PATH_PROTOCOL       End;
  51 } HII_VENDOR_DEVICE_PATH;
  52
  53 #pragma pack()
  54
  55 //
  56 // uni string and Vfr Binary data.
  57 //
  58 extern UINT8  VfrBin[];
  59 extern UINT8  PlatDriOverrideDxeStrings[];
  60
  61 //
  62 // module global data
  63 //
  64 EFI_GUID                     mPlatformOverridesManagerGuid = PLAT_OVER_MNGR_GUID;
  65 CHAR16                       mVariableName[] = L"Data";
  66 LIST_ENTRY                   mMappingDataBase = INITIALIZE_LIST_HEAD_VARIABLE (mMappingDataBase);
  67 BOOLEAN                      mEnvironmentVariableRead = FALSE;
  68 EFI_HANDLE                   mCallerImageHandle = NULL;
  69
  70 EFI_HANDLE                   *mDevicePathHandleBuffer;
  71 EFI_HANDLE                   *mDriverImageHandleBuffer;
  72
  73 INTN                         mSelectedCtrIndex;
  74 EFI_STRING_ID                mControllerToken[MAX_CHOICE_NUM];
  75 UINTN                        mDriverImageHandleCount;
  76 EFI_STRING_ID                mDriverImageToken[MAX_CHOICE_NUM];
  77 EFI_STRING_ID                mDriverImageFilePathToken[MAX_CHOICE_NUM];
  78 EFI_LOADED_IMAGE_PROTOCOL    *mDriverImageProtocol[MAX_CHOICE_NUM];
  79 EFI_DEVICE_PATH_PROTOCOL     *mControllerDevicePathProtocol[MAX_CHOICE_NUM];
  80 UINTN                        mSelectedDriverImageNum;
  81 UINTN                        mLastSavedDriverImageNum;
  82 UINT16                       mCurrentPage;
  83 EFI_CALLBACK_INFO           *mCallbackInfo;
  84
  85 HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath = {
  86   {
  87     {
  88       HARDWARE_DEVICE_PATH,
  89       HW_VENDOR_DP,
  90       {
  91         (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
  92         (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
  93       }
  94     },
  95     EFI_CALLER_ID_GUID
  96   },
  97   {
  98     END_DEVICE_PATH_TYPE,
  99     END_ENTIRE_DEVICE_PATH_SUBTYPE,
 100     {
 101       (UINT8) (END_DEVICE_PATH_LENGTH),
 102       (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
 103     }
 104   }
 105 };
 106
 107 /**
 108   Converting a given device to an unicode string.
 109
 110   This function will dependent on gEfiDevicePathToTextProtocolGuid, if protocol
 111   does not installed, then return unknown device path L"?" directly.
 112
 113   @param    DevPath     Given device path instance
 114
 115   @return   Converted string from given device path.
 116   @retval   L"?"  Can not locate gEfiDevicePathToTextProtocolGuid protocol for converting.
 117 **/
 118 CHAR16 *
 119 DevicePathToStr (
 120   IN EFI_DEVICE_PATH_PROTOCOL     *DevPath
 121   )
 122 {
 123   EFI_STATUS                       Status;
 124   EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *DevPathToText;
 125   CHAR16                           *ToText;
 126
 127   if (DevPath == NULL) {
 128     return L"";
 129   }
 130
 131   Status = gBS->LocateProtocol (
 132                   &gEfiDevicePathToTextProtocolGuid,
 133                   NULL,
 134                   (VOID **) &DevPathToText
 135                   );
 136   if (!EFI_ERROR (Status)) {
 137     ToText = DevPathToText->ConvertDevicePathToText (
 138                               DevPath,
 139                               FALSE,
 140                               TRUE
 141                               );
 142     ASSERT (ToText != NULL);
 143     return ToText;
 144   }
 145
 146   return L"?";
 147 }
 148
 149 /**
 150   Worker function to get the driver name by ComponentName or ComponentName2 protocol
 151   according to the driver binding handle.
 152
 153   @param  DriverBindingHandle  The Handle of DriverBinding.
 154   @param  ProtocolGuid         The pointer to Component Name (2) protocol GUID.
 155   @param  VariableName         The name of the RFC 4646 or ISO 639-2 language variable.
 156
 157   @retval !NULL               Pointer into the image name if the image name is found,
 158   @retval NULL                Pointer to NULL if the image name is not found.
 159
 160 **/
 161 CHAR16 *
 162 GetComponentNameWorker (
 163   IN EFI_HANDLE                      DriverBindingHandle,
 164   IN EFI_GUID                        *ProtocolGuid,
 165   IN CONST CHAR16                    *VariableName
 166   )
 167 {
 168   EFI_STATUS                         Status;
 169   EFI_COMPONENT_NAME_PROTOCOL        *ComponentName;
 170   CHAR16                             *DriverName;
 171   CHAR8                              *Language;
 172   CHAR8                              *BestLanguage;
 173
 174   Status = gBS->OpenProtocol (
 175                   DriverBindingHandle,
 176                   ProtocolGuid,
 177                   (VOID *) &ComponentName,
 178                   NULL,
 179                   NULL,
 180                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 181                   );
 182   if (EFI_ERROR (Status)) {
 183     return NULL;
 184   }
 185
 186   //
 187   // Find the best matching language.
 188   //
 189   Language = GetEfiGlobalVariable (VariableName);
 190   BestLanguage = GetBestLanguage (
 191                    ComponentName->SupportedLanguages,
 192                    (BOOLEAN) (ProtocolGuid == &gEfiComponentNameProtocolGuid),
 193                    Language,
 194                    NULL
 195                    );
 196
 197   DriverName = NULL;
 198   if (BestLanguage != NULL) {
 199     ComponentName->GetDriverName (
 200                      ComponentName,
 201                      BestLanguage,
 202                      &DriverName
 203                      );
 204     FreePool (BestLanguage);
 205   }
 206
 207   if (Language != NULL) {
 208     FreePool (Language);
 209   }
 210
 211   return DriverName;
 212 }
 213
 214
 215 /**
 216   Get the driver name by ComponentName or ComponentName2 protocol
 217   according to the driver binding handle
 218
 219   @param DriverBindingHandle  The Handle of DriverBinding.
 220
 221   @retval !NULL               Pointer into the image name if the image name is found,
 222   @retval NULL                Pointer to NULL if the image name is not found.
 223
 224 **/
 225 CHAR16 *
 226 GetComponentName (
 227   IN EFI_HANDLE                      DriverBindingHandle
 228   )
 229 {
 230   CHAR16                    *DriverName;
 231
 232   //
 233   // Try RFC 4646 Component Name 2 protocol first.
 234   //
 235   DriverName = GetComponentNameWorker (DriverBindingHandle, &gEfiComponentName2ProtocolGuid, L"PlatformLang");
 236   if (DriverName == NULL) {
 237     //
 238     // If we can not get driver name from Component Name 2 protocol, we can try ISO 639-2 Component Name protocol.
 239     //
 240     DriverName = GetComponentNameWorker (DriverBindingHandle, &gEfiComponentNameProtocolGuid, L"Lang");
 241   }
 242
 243   return DriverName;
 244 }
 245
 246 /**
 247   Get the image name from EFI UI section.
 248   Get FV protocol by its loaded image protocol to abstract EFI UI section.
 249
 250   @param Image            Pointer to the loaded image protocol
 251
 252   @retval !NULL           Pointer to the image name if the image name is found,
 253   @retval NULL            NULL if the image name is not found.
 254
 255 **/
 256 CHAR16 *
 257 GetImageName (
 258   IN EFI_LOADED_IMAGE_PROTOCOL *Image
 259   )
 260 {
 261   EFI_STATUS                        Status;
 262   EFI_DEVICE_PATH_PROTOCOL          *DevPathNode;
 263   EFI_DEVICE_PATH_PROTOCOL          *AlignedDevPathNode;
 264   MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
 265   VOID                              *Buffer;
 266   UINTN                             BufferSize;
 267   UINT32                            AuthenticationStatus;
 268   EFI_GUID                          *NameGuid;
 269   EFI_FIRMWARE_VOLUME2_PROTOCOL     *Fv2;
 270
 271   Fv2         = NULL;
 272   Buffer      = NULL;
 273   BufferSize  = 0;
 274
 275   if (Image->FilePath == NULL) {
 276     return NULL;
 277   }
 278   DevPathNode  = Image->FilePath;
 279
 280   while (!IsDevicePathEnd (DevPathNode)) {
 281     //
 282     // Make sure device path node is aligned when accessing it's FV Name Guid field.
 283     //
 284     AlignedDevPathNode = AllocateCopyPool (DevicePathNodeLength(DevPathNode), DevPathNode);
 285
 286     //
 287     // Find the Fv File path
 288     //
 289     NameGuid = EfiGetNameGuidFromFwVolDevicePathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *)AlignedDevPathNode);
 290     if (NameGuid != NULL) {
 291       FvFilePath = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) AlignedDevPathNode;
 292       Status = gBS->HandleProtocol (
 293                     Image->DeviceHandle,
 294                     &gEfiFirmwareVolume2ProtocolGuid,
 295                     (VOID **) &Fv2
 296                     );
 297       //
 298       // Locate Image EFI UI section to get the image name.
 299       //
 300       if (!EFI_ERROR (Status)) {
 301         Status = Fv2->ReadSection (
 302                         Fv2,
 303                         &FvFilePath->FvFileName,
 304                         EFI_SECTION_USER_INTERFACE,
 305                         0,
 306                         &Buffer,
 307                         &BufferSize,
 308                         &AuthenticationStatus
 309                         );
 310         if (!EFI_ERROR (Status)) {
 311           FreePool (AlignedDevPathNode);
 312           break;
 313         }
 314         Buffer = NULL;
 315       }
 316     }
 317
 318     FreePool (AlignedDevPathNode);
 319
 320     //
 321     // Next device path node
 322     //
 323     DevPathNode = NextDevicePathNode (DevPathNode);
 324   }
 325
 326   return Buffer;
 327 }
 328
 329 /**
 330   Prepare the first page to let user select the device controller which need to
 331   add mapping drivers if user select 'Refresh' in first page.
 332   During first page, user will see all currnet controller device path in system,
 333   select any device path will go to second page to select its overrides drivers.
 334
 335   @param  Private        Pointer to EFI_CALLBACK_INFO.
 336   @param  KeyValue       The callback key value of device controller item in first page.
 337   @param  FakeNvData     Pointer to PLAT_OVER_MNGR_DATA.
 338
 339   @retval EFI_SUCCESS    Always returned.
 340
 341 **/
 342 EFI_STATUS
 343 UpdateDeviceSelectPage (
 344   IN EFI_CALLBACK_INFO                *Private,
 345   IN UINT16                           KeyValue,
 346   IN PLAT_OVER_MNGR_DATA              *FakeNvData
 347   )
 348 {
 349   EFI_STATUS                                Status;
 350   UINTN                                     Index;
 351   UINTN                                     DevicePathHandleCount;
 352   CHAR16                                    *NewString;
 353   EFI_STRING_ID                             NewStringToken;
 354   CHAR16                                    *ControllerName;
 355   EFI_DEVICE_PATH_PROTOCOL                  *ControllerDevicePath;
 356   EFI_PCI_IO_PROTOCOL                       *PciIo;
 357   EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *BusSpecificDriverOverride;
 358   UINTN                                     Len;
 359   VOID                                      *StartOpCodeHandle;
 360   VOID                                      *EndOpCodeHandle;
 361   EFI_IFR_GUID_LABEL                        *StartLabel;
 362   EFI_IFR_GUID_LABEL                        *EndLabel;
 363
 364   //
 365   // Set current page form ID.
 366   //
 367   mCurrentPage = FORM_ID_DEVICE;
 368
 369   //
 370   // Initial the mapping database in memory
 371   //
 372   FreeMappingDatabase (&mMappingDataBase);
 373   InitOverridesMapping (&mMappingDataBase);
 374
 375   //
 376   // Init OpCode Handle
 377   //
 378   StartOpCodeHandle = HiiAllocateOpCodeHandle ();
 379   ASSERT (StartOpCodeHandle != NULL);
 380
 381   EndOpCodeHandle = HiiAllocateOpCodeHandle ();
 382   ASSERT (EndOpCodeHandle != NULL);
 383
 384   //
 385   // Create Hii Extend Label OpCode as the start opcode
 386   //
 387   StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 388   StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 389   StartLabel->Number = FORM_ID_DEVICE;
 390
 391   //
 392   // Create Hii Extend Label OpCode as the end opcode
 393   //
 394   EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 395   EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 396   EndLabel->Number       = LABEL_END;
 397
 398   //
 399   // Clear first page form
 400   //
 401   HiiUpdateForm (
 402     Private->RegisteredHandle,
 403     &mPlatformOverridesManagerGuid,
 404     FORM_ID_DEVICE,
 405     StartOpCodeHandle, // Label FORM_ID_DEVICE
 406     EndOpCodeHandle    // LABEL_END
 407     );
 408
 409   //
 410   // When user enter the page at first time, the 'first refresh' string is given to notify user to refresh all the drivers,
 411   // then the 'first refresh' string will be replaced by the 'refresh' string, and the two strings content are same after the replacement
 412   //
 413   NewStringToken = STRING_TOKEN (STR_FIRST_REFRESH);
 414   NewString = HiiGetString (Private->RegisteredHandle, STRING_TOKEN (STR_REFRESH), NULL);
 415   ASSERT (NewString != NULL);
 416   if (HiiSetString (Private->RegisteredHandle, NewStringToken, NewString, NULL) == 0) {
 417     ASSERT (FALSE);
 418   }
 419   FreePool (NewString);
 420
 421   NewStringToken = STRING_TOKEN (STR_FIRST_REFRESH_HELP);
 422   NewString = HiiGetString (Private->RegisteredHandle, STRING_TOKEN (STR_REFRESH_HELP), NULL);
 423   ASSERT (NewString != NULL);
 424   if (HiiSetString (Private->RegisteredHandle, NewStringToken, NewString, NULL) == 0) {
 425     ASSERT (FALSE);
 426   }
 427   FreePool (NewString);
 428
 429   //
 430   // created needed controller device item in first page
 431   //
 432   DevicePathHandleCount  = 0;
 433   Status = gBS->LocateHandleBuffer (
 434                   ByProtocol,
 435                   &gEfiDevicePathProtocolGuid,
 436                   NULL,
 437                   &DevicePathHandleCount,
 438                   &mDevicePathHandleBuffer
 439                   );
 440   if (EFI_ERROR (Status) || (DevicePathHandleCount == 0)) {
 441     return EFI_SUCCESS;
 442   }
 443
 444   for (Index = 0; Index < DevicePathHandleCount; Index++) {
 445     if (FakeNvData->PciDeviceFilter == 0x01) {
 446       //
 447       // Only care PCI device which contain efi driver in its option rom.
 448       //
 449
 450       //
 451       // Check whether it is a pci device
 452       //
 453       ControllerDevicePath = NULL;
 454       Status = gBS->OpenProtocol (
 455                       mDevicePathHandleBuffer[Index],
 456                       &gEfiPciIoProtocolGuid,
 457                       (VOID **) &PciIo,
 458                       NULL,
 459                       NULL,
 460                       EFI_OPEN_PROTOCOL_GET_PROTOCOL
 461                       );
 462       if (EFI_ERROR (Status)) {
 463         continue;
 464       }
 465       //
 466       // Check whether it contain efi driver in its option rom
 467       //
 468       Status = gBS->HandleProtocol(
 469                        mDevicePathHandleBuffer[Index],
 470                        &gEfiBusSpecificDriverOverrideProtocolGuid,
 471                        (VOID **) &BusSpecificDriverOverride
 472                        );
 473       if (EFI_ERROR (Status) || BusSpecificDriverOverride == NULL) {
 474         continue;
 475       }
 476     }
 477
 478     ControllerDevicePath = NULL;
 479     Status = gBS->OpenProtocol (
 480                     mDevicePathHandleBuffer[Index],
 481                     &gEfiDevicePathProtocolGuid,
 482                     (VOID **) &ControllerDevicePath,
 483                     NULL,
 484                     NULL,
 485                     EFI_OPEN_PROTOCOL_GET_PROTOCOL
 486                     );
 487     ASSERT_EFI_ERROR (Status);
 488     //
 489     // Save the device path protocol interface
 490     //
 491     mControllerDevicePathProtocol[Index] = ControllerDevicePath;
 492
 493     //
 494     // Get the driver name
 495     //
 496     ControllerName = DevicePathToStr (ControllerDevicePath);
 497
 498     //
 499     // Export the driver name string and create item in set options page
 500     //
 501     Len = StrSize (ControllerName);
 502     NewString = AllocateZeroPool (Len + StrSize (L"--"));
 503     ASSERT (NewString != NULL);
 504     if (EFI_ERROR (CheckMapping (ControllerDevicePath,NULL, &mMappingDataBase, NULL, NULL))) {
 505       StrCat (NewString, L"--");
 506     } else {
 507       StrCat (NewString, L"**");
 508     }
 509     StrCat (NewString, ControllerName);
 510
 511     NewStringToken = HiiSetString (Private->RegisteredHandle, mControllerToken[Index], NewString, NULL);
 512     ASSERT (NewStringToken != 0);
 513     FreePool (NewString);
 514     //
 515     // Save the device path string toke for next access use
 516     //
 517     mControllerToken[Index] = NewStringToken;
 518
 519     HiiCreateGotoOpCode (
 520       StartOpCodeHandle,
 521       FORM_ID_DRIVER,
 522       NewStringToken,
 523       STRING_TOKEN (STR_GOTO_HELP_DRIVER),
 524       EFI_IFR_FLAG_CALLBACK,
 525       (UINT16) (Index + KEY_VALUE_DEVICE_OFFSET)
 526       );
 527   }
 528
 529   //
 530   // Update first page form
 531   //
 532   HiiUpdateForm (
 533     Private->RegisteredHandle,
 534     &mPlatformOverridesManagerGuid,
 535     FORM_ID_DEVICE,
 536     StartOpCodeHandle, // Label FORM_ID_DEVICE
 537     EndOpCodeHandle    // LABEL_END
 538     );
 539
 540   HiiFreeOpCodeHandle (StartOpCodeHandle);
 541   HiiFreeOpCodeHandle (EndOpCodeHandle);
 542
 543   return EFI_SUCCESS;
 544 }
 545
 546 /**
 547   Get the first Driver Binding handle which has the specific image handle.
 548
 549   @param  ImageHandle          The Image handle
 550
 551   @return                      Handle to Driver binding
 552   @retval NULL                 The paramter is not valid or the driver binding handle is not found.
 553
 554 **/
 555 EFI_HANDLE
 556 GetDriverBindingHandleFromImageHandle (
 557   IN  EFI_HANDLE   ImageHandle
 558   )
 559 {
 560   EFI_STATUS                        Status;
 561   UINTN                             Index;
 562   UINTN                             DriverBindingHandleCount;
 563   EFI_HANDLE                        *DriverBindingHandleBuffer;
 564   EFI_DRIVER_BINDING_PROTOCOL       *DriverBindingInterface;
 565   EFI_HANDLE                        DriverBindingHandle;
 566
 567   DriverBindingHandle = NULL;
 568
 569   if (ImageHandle == NULL) {
 570     return NULL;
 571   }
 572   //
 573   // Get all drivers which support driver binding protocol
 574   //
 575   DriverBindingHandleCount  = 0;
 576   Status = gBS->LocateHandleBuffer (
 577                   ByProtocol,
 578                   &gEfiDriverBindingProtocolGuid,
 579                   NULL,
 580                   &DriverBindingHandleCount,
 581                   &DriverBindingHandleBuffer
 582                   );
 583   if (EFI_ERROR (Status) || (DriverBindingHandleCount == 0)) {
 584     return NULL;
 585   }
 586
 587   //
 588   // Get the first Driver Binding handle which has the specific image handle.
 589   //
 590   for (Index = 0; Index < DriverBindingHandleCount; Index++) {
 591     DriverBindingInterface = NULL;
 592     Status = gBS->OpenProtocol (
 593                     DriverBindingHandleBuffer[Index],
 594                     &gEfiDriverBindingProtocolGuid,
 595                     (VOID **) &DriverBindingInterface,
 596                     NULL,
 597                     NULL,
 598                     EFI_OPEN_PROTOCOL_GET_PROTOCOL
 599                     );
 600     if (EFI_ERROR (Status)) {
 601       continue;
 602     }
 603
 604     if (DriverBindingInterface->ImageHandle == ImageHandle) {
 605       DriverBindingHandle = DriverBindingHandleBuffer[Index];
 606       break;
 607     }
 608   }
 609
 610   FreePool (DriverBindingHandleBuffer);
 611   return DriverBindingHandle;
 612 }
 613
 614 /**
 615   Prepare to let user select the drivers which need mapping with the device controller
 616   selected in first page.
 617
 618   @param  Private        Pointer to EFI_CALLBACK_INFO.
 619   @param  KeyValue       The callback key value of device controller item in first page.
 620                          KeyValue is larger than or equal to KEY_VALUE_DEVICE_OFFSET.
 621   @param  FakeNvData     Pointer to PLAT_OVER_MNGR_DATA.
 622
 623   @retval EFI_SUCCESS    Always returned.
 624
 625 **/
 626 EFI_STATUS
 627 UpdateBindingDriverSelectPage (
 628   IN EFI_CALLBACK_INFO                *Private,
 629   IN UINT16                           KeyValue,
 630   IN PLAT_OVER_MNGR_DATA              *FakeNvData
 631   )
 632 {
 633   EFI_STATUS                                Status;
 634   UINTN                                     Index;
 635   CHAR16                                    *NewString;
 636   EFI_STRING_ID                             NewStringToken;
 637   EFI_STRING_ID                             NewStringHelpToken;
 638   UINTN                                     DriverImageHandleCount;
 639   EFI_LOADED_IMAGE_PROTOCOL                 *LoadedImage;
 640   CHAR16                                    *DriverName;
 641   BOOLEAN                                   FreeDriverName;
 642   EFI_DEVICE_PATH_PROTOCOL                  *LoadedImageDevicePath;
 643   EFI_BUS_SPECIFIC_DRIVER_OVERRIDE_PROTOCOL *BusSpecificDriverOverride;
 644   EFI_HANDLE                                DriverBindingHandle;
 645   VOID                                      *StartOpCodeHandle;
 646   VOID                                      *EndOpCodeHandle;
 647   EFI_IFR_GUID_LABEL                        *StartLabel;
 648   EFI_IFR_GUID_LABEL                        *EndLabel;
 649
 650   //
 651   // If user select a controller item in the first page  the following code will be run.
 652   // During second page, user will see all currnet driver bind protocol driver, the driver name and its device path will be shown
 653   //
 654   //First acquire the list of Loaded Image Protocols, and then when  want the name of the driver, look up all the Driver Binding Protocols
 655   // and find the first one whose ImageHandle field matches the image handle of the Loaded Image Protocol.
 656   // then use the Component Name Protocol on the same handle as the first matching Driver Binding Protocol to look up the name of the driver.
 657   //
 658
 659   mCurrentPage = FORM_ID_DRIVER;
 660   //
 661   // Switch the item callback key value to its NO. in mDevicePathHandleBuffer
 662   //
 663   mSelectedCtrIndex = KeyValue - KEY_VALUE_DEVICE_OFFSET;
 664   ASSERT (mSelectedCtrIndex >= 0 && mSelectedCtrIndex < MAX_CHOICE_NUM);
 665
 666   mLastSavedDriverImageNum = 0;
 667
 668   //
 669   // Init OpCode Handle
 670   //
 671   StartOpCodeHandle = HiiAllocateOpCodeHandle ();
 672   ASSERT (StartOpCodeHandle != NULL);
 673
 674   EndOpCodeHandle = HiiAllocateOpCodeHandle ();
 675   ASSERT (EndOpCodeHandle != NULL);
 676
 677   //
 678   // Create Hii Extend Label OpCode as the start opcode
 679   //
 680   StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 681   StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 682   StartLabel->Number       = FORM_ID_DRIVER;
 683
 684   //
 685   // Create Hii Extend Label OpCode as the end opcode
 686   //
 687   EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 688   EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 689   EndLabel->Number       = LABEL_END;
 690
 691   //
 692   // Clear second page form
 693   //
 694   HiiUpdateForm (
 695     Private->RegisteredHandle,
 696     &mPlatformOverridesManagerGuid,
 697     FORM_ID_DRIVER,
 698     StartOpCodeHandle,
 699     EndOpCodeHandle
 700     );
 701
 702   //
 703   // Show all driver which support loaded image protocol in second page
 704   //
 705   DriverImageHandleCount  = 0;
 706   Status = gBS->LocateHandleBuffer (
 707                   ByProtocol,
 708                   &gEfiLoadedImageProtocolGuid,
 709                   NULL,
 710                   &DriverImageHandleCount,
 711                   &mDriverImageHandleBuffer
 712                   );
 713   if (EFI_ERROR (Status) || (DriverImageHandleCount == 0)) {
 714     return EFI_NOT_FOUND;
 715   }
 716
 717   mDriverImageHandleCount = DriverImageHandleCount;
 718   for (Index = 0; Index < DriverImageHandleCount; Index++) {
 719     //
 720     // Step1: Get the driver image total file path for help string and the driver name.
 721     //
 722
 723     //
 724     // Find driver's Loaded Image protocol
 725     //
 726     LoadedImage =NULL;
 727
 728     Status = gBS->OpenProtocol (
 729                     mDriverImageHandleBuffer[Index],
 730                     &gEfiLoadedImageProtocolGuid,
 731                     (VOID **) &LoadedImage,
 732                     NULL,
 733                     NULL,
 734                     EFI_OPEN_PROTOCOL_GET_PROTOCOL
 735                     );
 736     if (EFI_ERROR (Status)) {
 737       FakeNvData->DriSelection[Index] = 0x00;
 738       continue;
 739     }
 740     mDriverImageProtocol[Index] = LoadedImage;
 741     //
 742     // Find its related driver binding protocol
 743     //
 744     DriverBindingHandle = GetDriverBindingHandleFromImageHandle (mDriverImageHandleBuffer[Index]);
 745     if (DriverBindingHandle == NULL) {
 746       FakeNvData->DriSelection[Index] = 0x00;
 747       continue;
 748     }
 749
 750     //
 751     // Get the EFI Loaded Image Device Path Protocol
 752     //
 753     LoadedImageDevicePath = NULL;
 754     Status = gBS->HandleProtocol (
 755                         mDriverImageHandleBuffer[Index],
 756                         &gEfiLoadedImageDevicePathProtocolGuid,
 757                         (VOID **) &LoadedImageDevicePath
 758                         );
 759     if (LoadedImageDevicePath == NULL) {
 760       FakeNvData->DriSelection[Index] = 0x00;
 761       continue;
 762     }
 763
 764     if (FakeNvData->PciDeviceFilter == 0x01) {
 765       //
 766       // only care the driver which is in a Pci device option rom,
 767       // and the driver's LoadedImage->DeviceHandle must point to a pci device which has efi option rom
 768       //
 769       if (!EFI_ERROR (Status)) {
 770         Status = gBS->HandleProtocol(
 771                          LoadedImage->DeviceHandle,
 772                          &gEfiBusSpecificDriverOverrideProtocolGuid,
 773                          (VOID **) &BusSpecificDriverOverride
 774                          );
 775         if (EFI_ERROR (Status) || BusSpecificDriverOverride == NULL) {
 776           FakeNvData->DriSelection[Index] = 0x00;
 777           continue;
 778         }
 779       } else {
 780         FakeNvData->DriSelection[Index] = 0x00;
 781         continue;
 782       }
 783     }
 784
 785     //
 786     // For driver name, try to get its component name, if fail, get its image name,
 787     // if also fail, give a default name.
 788     //
 789     FreeDriverName = FALSE;
 790     DriverName = GetComponentName (DriverBindingHandle);
 791     if (DriverName == NULL) {
 792       //
 793       // get its image name
 794       //
 795       DriverName = GetImageName (LoadedImage);
 796     }
 797     if (DriverName == NULL) {
 798       //
 799       // give a default name
 800       //
 801       DriverName = HiiGetString (Private->RegisteredHandle, STRING_TOKEN (STR_DRIVER_DEFAULT_NAME), NULL);
 802       ASSERT (DriverName != NULL);
 803       FreeDriverName = TRUE;  // the DriverName string need to free pool
 804     }
 805
 806
 807     //
 808     // Step2 Export the driver name string and create check box item in second page
 809     //
 810
 811     //
 812     // First create the driver image name
 813     //
 814     NewString = AllocateZeroPool (StrSize (DriverName));
 815     ASSERT (NewString != NULL);
 816     if (EFI_ERROR (CheckMapping (mControllerDevicePathProtocol[mSelectedCtrIndex], LoadedImageDevicePath, &mMappingDataBase, NULL, NULL))) {
 817       FakeNvData->DriSelection[Index] = 0x00;
 818     } else {
 819       FakeNvData->DriSelection[Index] = 0x01;
 820       mLastSavedDriverImageNum++;
 821     }
 822     StrCat (NewString, DriverName);
 823     NewStringToken = HiiSetString (Private->RegisteredHandle, mDriverImageToken[Index], NewString, NULL);
 824     ASSERT (NewStringToken != 0);
 825     mDriverImageToken[Index] = NewStringToken;
 826     FreePool (NewString);
 827     if (FreeDriverName) {
 828       FreePool (DriverName);
 829     }
 830
 831     //
 832     // Second create the driver image device path as item help string
 833     //
 834     DriverName = DevicePathToStr (LoadedImageDevicePath);
 835
 836     NewString = AllocateZeroPool (StrSize (DriverName));
 837     ASSERT (NewString != NULL);
 838     StrCat (NewString, DriverName);
 839     NewStringHelpToken = HiiSetString (Private->RegisteredHandle, mDriverImageFilePathToken[Index], NewString, NULL);
 840     ASSERT (NewStringHelpToken != 0);
 841     mDriverImageFilePathToken[Index] = NewStringHelpToken;
 842     FreePool (NewString);
 843     FreePool (DriverName);
 844
 845     HiiCreateCheckBoxOpCode (
 846       StartOpCodeHandle,
 847       (UINT16) (DRIVER_SELECTION_QUESTION_ID + Index),
 848       VARSTORE_ID_PLAT_OVER_MNGR,
 849       (UINT16) (DRIVER_SELECTION_VAR_OFFSET + Index),
 850       NewStringToken,
 851       NewStringHelpToken,
 852       0,
 853       0,
 854       NULL
 855       );
 856   }
 857
 858   //
 859   // Update second page form
 860   //
 861   HiiUpdateForm (
 862     Private->RegisteredHandle,
 863     &mPlatformOverridesManagerGuid,
 864     FORM_ID_DRIVER,
 865     StartOpCodeHandle, // Label FORM_ID_DRIVER
 866     EndOpCodeHandle    // LABEL_END
 867     );
 868
 869   HiiFreeOpCodeHandle (StartOpCodeHandle);
 870   HiiFreeOpCodeHandle (EndOpCodeHandle);
 871   return EFI_SUCCESS;
 872 }
 873
 874 /**
 875   Prepare to let user select the priority order of the drivers which are
 876   selected in second page.
 877
 878   @param  Private        Pointer to EFI_CALLBACK_INFO.
 879   @param  KeyValue       The callback key value of device controller item in first page.
 880   @param  FakeNvData     Pointer to PLAT_OVER_MNGR_DATA.
 881
 882   @retval EFI_SUCCESS    Always returned.
 883
 884 **/
 885 EFI_STATUS
 886 UpdatePrioritySelectPage (
 887   IN EFI_CALLBACK_INFO                *Private,
 888   IN UINT16                           KeyValue,
 889   IN PLAT_OVER_MNGR_DATA              *FakeNvData
 890   )
 891 {
 892   UINTN                                     Index;
 893   EFI_DEVICE_PATH_PROTOCOL                  *LoadedImageDevicePath;
 894   UINTN                                     SelectedDriverImageNum;
 895   UINT32                                    DriverImageNO;
 896   UINTN                                     MinNO;
 897   UINTN                                     Index1;
 898   UINTN                                     TempNO[100];
 899   UINTN                                     OrderNO[100];
 900   VOID                                      *StartOpCodeHandle;
 901   VOID                                      *EndOpCodeHandle;
 902   VOID                                      *OptionsOpCodeHandle;
 903   EFI_IFR_GUID_LABEL                        *StartLabel;
 904   EFI_IFR_GUID_LABEL                        *EndLabel;
 905
 906   //
 907   // Following code will be run if user select 'order ... priority' item in second page
 908   // Prepare third page.  In third page, user will order the  drivers priority which are selected in second page
 909   //
 910   mCurrentPage = FORM_ID_ORDER;
 911
 912   //
 913   // Init OpCode Handle
 914   //
 915   StartOpCodeHandle = HiiAllocateOpCodeHandle ();
 916   ASSERT (StartOpCodeHandle != NULL);
 917
 918   EndOpCodeHandle = HiiAllocateOpCodeHandle ();
 919   ASSERT (EndOpCodeHandle != NULL);
 920
 921   //
 922   // Create Hii Extend Label OpCode as the start opcode
 923   //
 924   StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 925   StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 926   StartLabel->Number       = FORM_ID_ORDER;
 927
 928   //
 929   // Create Hii Extend Label OpCode as the end opcode
 930   //
 931   EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
 932   EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
 933   EndLabel->Number       = LABEL_END;
 934
 935   //
 936   // Clear third page form
 937   //
 938   HiiUpdateForm (
 939     Private->RegisteredHandle,
 940     &mPlatformOverridesManagerGuid,
 941     FORM_ID_ORDER,
 942     StartOpCodeHandle,
 943     EndOpCodeHandle
 944     );
 945
 946   //
 947   // Check how many drivers have been selected
 948   //
 949   SelectedDriverImageNum = 0;
 950   for (Index = 0; Index < mDriverImageHandleCount; Index++) {
 951     if (FakeNvData->DriSelection[Index] != 0) {
 952       SelectedDriverImageNum ++;
 953     }
 954   }
 955
 956   mSelectedDriverImageNum = SelectedDriverImageNum;
 957   if (SelectedDriverImageNum == 0) {
 958     return EFI_SUCCESS;
 959   }
 960
 961   OptionsOpCodeHandle = HiiAllocateOpCodeHandle ();
 962   ASSERT (OptionsOpCodeHandle != NULL);
 963
 964   //
 965   // Create order list for those selected drivers
 966   //
 967   SelectedDriverImageNum = 0;
 968   for (Index = 0; Index < mDriverImageHandleCount; Index++) {
 969     if (FakeNvData->DriSelection[Index] != 0) {
 970       //
 971       // Use the NO. in driver binding buffer as value, will use it later
 972       //
 973       HiiCreateOneOfOptionOpCode (
 974         OptionsOpCodeHandle,
 975         mDriverImageToken[Index],
 976         0,
 977         EFI_IFR_NUMERIC_SIZE_1,
 978         Index + 1
 979         );
 980
 981       //
 982       // Get the EFI Loaded Image Device Path Protocol
 983       //
 984       LoadedImageDevicePath = NULL;
 985       gBS->HandleProtocol (
 986                  mDriverImageHandleBuffer[Index],
 987                  &gEfiLoadedImageDevicePathProtocolGuid,
 988                  (VOID **) &LoadedImageDevicePath
 989                  );
 990       ASSERT (LoadedImageDevicePath != NULL);
 991
 992       //
 993       // Check the driver DriverImage's order number in mapping database
 994       //
 995       DriverImageNO = 0;
 996       CheckMapping (
 997               mControllerDevicePathProtocol[mSelectedCtrIndex],
 998               LoadedImageDevicePath,
 999               &mMappingDataBase,
1000               NULL,
1001               &DriverImageNO
1002               );
1003       if (DriverImageNO == 0) {
1004         DriverImageNO = (UINT32) mLastSavedDriverImageNum + 1;
1005         mLastSavedDriverImageNum++;
1006       }
1007       TempNO[SelectedDriverImageNum] = DriverImageNO;
1008       OrderNO[SelectedDriverImageNum] = Index + 1;
1009       SelectedDriverImageNum ++;
1010     }
1011   }
1012
1013   ASSERT (SelectedDriverImageNum == mSelectedDriverImageNum);
1014   //
1015   // NvRamMap Must be clear firstly
1016   //
1017   ZeroMem (FakeNvData->DriOrder, sizeof (FakeNvData->DriOrder));
1018
1019   //
1020   // Order the selected drivers according to the info already in mapping database
1021   // the less order number in mapping database the less order number in NvRamMap
1022   //
1023   for (Index=0; Index < SelectedDriverImageNum; Index++) {
1024     //
1025     // Find the minimal order number in TempNO array,  its index in TempNO is same as IfrOptionList array
1026     //
1027     MinNO = 0;
1028     for (Index1=0; Index1 < SelectedDriverImageNum; Index1++) {
1029       if (TempNO[Index1] < TempNO[MinNO]) {
1030         MinNO = Index1;
1031       }
1032     }
1033     //
1034     // the IfrOptionList[MinNO].Value = the driver NO. in driver binding buffer
1035     //
1036     FakeNvData->DriOrder[Index] = (UINT8) OrderNO[MinNO];
1037     TempNO[MinNO] = MAX_CHOICE_NUM + 1;
1038   }
1039
1040   //
1041   // Create Order List OpCode
1042   //
1043   HiiCreateOrderedListOpCode (
1044     StartOpCodeHandle,
1045     (UINT16) DRIVER_ORDER_QUESTION_ID,
1046     VARSTORE_ID_PLAT_OVER_MNGR,
1047     (UINT16) DRIVER_ORDER_VAR_OFFSET,
1048     mControllerToken[mSelectedCtrIndex],
1049     mControllerToken[mSelectedCtrIndex],
1050     EFI_IFR_FLAG_RESET_REQUIRED,
1051     0,
1052     EFI_IFR_NUMERIC_SIZE_1,
1053     (UINT8) MAX_CHOICE_NUM,
1054     OptionsOpCodeHandle,
1055     NULL
1056     );
1057
1058   //
1059   // Update third page form
1060   //
1061   HiiUpdateForm (
1062     Private->RegisteredHandle,
1063     &mPlatformOverridesManagerGuid,
1064     FORM_ID_ORDER,
1065     StartOpCodeHandle, // Label FORM_ID_ORDER
1066     EndOpCodeHandle    // LABEL_END
1067     );
1068
1069   HiiFreeOpCodeHandle (StartOpCodeHandle);
1070   HiiFreeOpCodeHandle (EndOpCodeHandle);
1071   HiiFreeOpCodeHandle (OptionsOpCodeHandle);
1072
1073   return EFI_SUCCESS;
1074 }
1075
1076 /**
1077   Save the save the mapping database to NV variable.
1078
1079   @param  Private        Pointer to EFI_CALLBACK_INFO.
1080   @param  KeyValue       The callback key value of device controller item in first page.
1081   @param  FakeNvData     Pointer to PLAT_OVER_MNGR_DATA.
1082
1083   @retval EFI_SUCCESS    Always returned.
1084
1085 **/
1086 EFI_STATUS
1087 CommintChanges (
1088   IN EFI_CALLBACK_INFO                *Private,
1089   IN UINT16                           KeyValue,
1090   IN PLAT_OVER_MNGR_DATA              *FakeNvData
1091   )
1092 {
1093   EFI_STATUS                                Status;
1094   UINTN                                     Index;
1095   UINTN                                     SelectedDriverImageNum;
1096   EFI_DEVICE_PATH_PROTOCOL                  *LoadedImageDevicePath;
1097   //
1098   //  Following code will be run if user select 'commint changes' in third page
1099   //  user enter 'Commit Changes' to save the mapping database
1100   //
1101   DeleteDriverImage (mControllerDevicePathProtocol[mSelectedCtrIndex], NULL, &mMappingDataBase);
1102   for (SelectedDriverImageNum = 0; SelectedDriverImageNum < mSelectedDriverImageNum; SelectedDriverImageNum++) {
1103     //
1104     // DriOrder[SelectedDriverImageNum] = the driver NO. in driver binding buffer
1105     //
1106     Index = FakeNvData->DriOrder[SelectedDriverImageNum] - 1;
1107
1108     //
1109     // Get the EFI Loaded Image Device Path Protocol
1110     //
1111     LoadedImageDevicePath = NULL;
1112     Status = gBS->HandleProtocol (
1113                         mDriverImageHandleBuffer[Index],
1114                         &gEfiLoadedImageDevicePathProtocolGuid,
1115                         (VOID **) &LoadedImageDevicePath
1116                         );
1117     ASSERT (LoadedImageDevicePath != NULL);
1118
1119     InsertDriverImage (
1120             mControllerDevicePathProtocol[mSelectedCtrIndex],
1121             LoadedImageDevicePath,
1122             &mMappingDataBase,
1123             (UINT32)SelectedDriverImageNum + 1
1124             );
1125   }
1126   Status = SaveOverridesMapping (&mMappingDataBase);
1127
1128   return Status;
1129 }
1130
1131 /**
1132   This function allows a caller to extract the current configuration for one
1133   or more named elements from the target driver.
1134
1135   @param  This         Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
1136   @param  Request      A null-terminated Unicode string in <ConfigRequest> format.
1137   @param  Progress     On return, points to a character in the Request string.
1138                        Points to the string's null terminator if request was successful.
1139                        Points to the most recent '&' before the first failing name/value
1140                        pair (or the beginning of the string if the failure is in the
1141                        first name/value pair) if the request was not successful.
1142   @param  Results      A null-terminated Unicode string in <ConfigAltResp> format which
1143                        has all values filled in for the names in the Request string.
1144                        String to be allocated by the called function.
1145
1146   @retval EFI_SUCCESS            The Results is filled with the requested values.
1147   @retval EFI_OUT_OF_RESOURCES   Not enough memory to store the results.
1148   @retval EFI_INVALID_PARAMETER  Request is illegal syntax, or unknown name.
1149   @retval EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.
1150
1151 **/
1152 EFI_STATUS
1153 EFIAPI
1154 PlatOverMngrExtractConfig (
1155   IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
1156   IN  CONST EFI_STRING                       Request,
1157   OUT EFI_STRING                             *Progress,
1158   OUT EFI_STRING                             *Results
1159   )
1160 {
1161   EFI_STATUS                       Status;
1162   EFI_CALLBACK_INFO                *Private;
1163   EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;
1164   EFI_STRING                       ConfigRequestHdr;
1165   EFI_STRING                       ConfigRequest;
1166   BOOLEAN                          AllocatedRequest;
1167   UINTN                            Size;
1168   UINTN                            BufferSize;
1169
1170   if (Progress == NULL || Results == NULL) {
1171     return EFI_INVALID_PARAMETER;
1172   }
1173
1174   *Progress = Request;
1175   if ((Request != NULL) && !HiiIsConfigHdrMatch (Request, &mPlatformOverridesManagerGuid, mVariableName)) {
1176     return EFI_NOT_FOUND;
1177   }
1178
1179   ConfigRequestHdr = NULL;
1180   ConfigRequest    = NULL;
1181   Size             = 0;
1182   AllocatedRequest = FALSE;
1183
1184   Private          = EFI_CALLBACK_INFO_FROM_THIS (This);
1185   HiiConfigRouting = Private->HiiConfigRouting;
1186   ConfigRequest = Request;
1187   if ((Request == NULL) || (StrStr (Request, L"OFFSET") == NULL)) {
1188     //
1189     // Request has no request element, construct full request string.
1190     // Allocate and fill a buffer large enough to hold the <ConfigHdr> template
1191     // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator
1192     //
1193     ConfigRequestHdr = HiiConstructConfigHdr (&mPlatformOverridesManagerGuid, mVariableName, Private->DriverHandle);
1194     Size = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);
1195     ConfigRequest = AllocateZeroPool (Size);
1196     ASSERT (ConfigRequest != NULL);
1197     AllocatedRequest = TRUE;
1198     BufferSize = sizeof (PLAT_OVER_MNGR_DATA);
1199     UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", ConfigRequestHdr, (UINT64)BufferSize);
1200     FreePool (ConfigRequestHdr);
1201   }
1202
1203   //
1204   // Convert buffer data to <ConfigResp> by helper function BlockToConfig()
1205   //
1206   Status = HiiConfigRouting->BlockToConfig (
1207                                 HiiConfigRouting,
1208                                 ConfigRequest,
1209                                 (UINT8 *) &Private->FakeNvData,
1210                                 sizeof (PLAT_OVER_MNGR_DATA),
1211                                 Results,
1212                                 Progress
1213                                 );
1214
1215   //
1216   // Free the allocated config request string.
1217   //
1218   if (AllocatedRequest) {
1219     FreePool (ConfigRequest);
1220     ConfigRequest = NULL;
1221   }
1222   //
1223   // Set Progress string to the original request string.
1224   //
1225   if (Request == NULL) {
1226     *Progress = NULL;
1227   } else if (StrStr (Request, L"OFFSET") == NULL) {
1228     *Progress = Request + StrLen (Request);
1229   }
1230
1231   return Status;
1232 }
1233
1234 /**
1235   This function processes the results of changes in configuration.
1236
1237   @param  This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
1238   @param  Configuration   A null-terminated Unicode string in <ConfigRequest> format.
1239   @param  Progress        A pointer to a string filled in with the offset of the most
1240                           recent '&' before the first failing name/value pair (or the
1241                           beginning of the string if the failure is in the first
1242                           name/value pair) or the terminating NULL if all was successful.
1243
1244   @retval EFI_SUCCESS            The Results is processed successfully.
1245   @retval EFI_INVALID_PARAMETER  Configuration is NULL.
1246   @retval EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.
1247
1248 **/
1249 EFI_STATUS
1250 EFIAPI
1251 PlatOverMngrRouteConfig (
1252   IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
1253   IN  CONST EFI_STRING                       Configuration,
1254   OUT EFI_STRING                             *Progress
1255   )
1256 {
1257   EFI_CALLBACK_INFO                         *Private;
1258   UINT16                                    KeyValue;
1259   PLAT_OVER_MNGR_DATA                       *FakeNvData;
1260
1261   if (Configuration == NULL || Progress == NULL) {
1262     return EFI_INVALID_PARAMETER;
1263   }
1264   *Progress = Configuration;
1265
1266   if (!HiiIsConfigHdrMatch (Configuration, &mPlatformOverridesManagerGuid, mVariableName)) {
1267     return EFI_NOT_FOUND;
1268   }
1269
1270   *Progress = Configuration + StrLen (Configuration);
1271   Private    = EFI_CALLBACK_INFO_FROM_THIS (This);
1272   FakeNvData = &Private->FakeNvData;
1273   if (!HiiGetBrowserData (&mPlatformOverridesManagerGuid, mVariableName, sizeof (PLAT_OVER_MNGR_DATA), (UINT8 *) FakeNvData)) {
1274     //
1275     // FakeNvData can't be got from SetupBrowser, which doesn't need to be set.
1276     //
1277     return EFI_SUCCESS;
1278   }
1279
1280   if (mCurrentPage == FORM_ID_DRIVER) {
1281     KeyValue = KEY_VALUE_DRIVER_GOTO_ORDER;
1282     UpdatePrioritySelectPage (Private, KeyValue, FakeNvData);
1283     KeyValue = KEY_VALUE_ORDER_SAVE_AND_EXIT;
1284     CommintChanges (Private, KeyValue, FakeNvData);
1285     //
1286     // Since UpdatePrioritySelectPage will change mCurrentPage,
1287     // should ensure the mCurrentPage still indicate the second page here
1288     //
1289     mCurrentPage = FORM_ID_DRIVER;
1290   }
1291
1292   if (mCurrentPage == FORM_ID_ORDER) {
1293     KeyValue = KEY_VALUE_ORDER_SAVE_AND_EXIT;
1294     CommintChanges (Private, KeyValue, FakeNvData);
1295   }
1296
1297   return EFI_SUCCESS;
1298 }
1299
1300 /**
1301   This is the function that is called to provide results data to the driver.  This data
1302   consists of a unique key which is used to identify what data is either being passed back
1303   or being asked for.
1304
1305   @param  This           Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
1306   @param  Action         A null-terminated Unicode string in <ConfigRequest> format.
1307   @param  KeyValue       A unique Goto OpCode callback value which record user's selection.
1308                          0x100 <= KeyValue <0x500 : user select a controller item in the first page;
1309                          KeyValue == 0x1234       : user select 'Refresh' in first page, or user select 'Go to Previous Menu' in second page
1310                          KeyValue == 0x1235       : user select 'Pci device filter' in first page
1311                          KeyValue == 0x1500       : user select 'order ... priority' item in second page
1312                          KeyValue == 0x1800       : user select 'commint changes' in third page
1313                          KeyValue == 0x2000       : user select 'Go to Previous Menu' in third page
1314   @param  Type           The type of value for the question.
1315   @param  Value          A pointer to the data being sent to the original exporting driver.
1316   @param  ActionRequest  On return, points to the action requested by the callback function.
1317
1318   @retval EFI_SUCCESS    Always returned.
1319
1320 **/
1321 EFI_STATUS
1322 EFIAPI
1323 PlatOverMngrCallback (
1324   IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
1325   IN  EFI_BROWSER_ACTION                     Action,
1326   IN  EFI_QUESTION_ID                        KeyValue,
1327   IN  UINT8                                  Type,
1328   IN  EFI_IFR_TYPE_VALUE                     *Value,
1329   OUT EFI_BROWSER_ACTION_REQUEST             *ActionRequest
1330   )
1331 {
1332   EFI_CALLBACK_INFO                         *Private;
1333   EFI_STATUS                                Status;
1334   EFI_STRING_ID                             NewStringToken;
1335   EFI_INPUT_KEY                             Key;
1336   PLAT_OVER_MNGR_DATA                       *FakeNvData;
1337
1338   if (Action == EFI_BROWSER_ACTION_CHANGING) {
1339     Private = EFI_CALLBACK_INFO_FROM_THIS (This);
1340     FakeNvData = &Private->FakeNvData;
1341     if (!HiiGetBrowserData (&mPlatformOverridesManagerGuid, mVariableName, sizeof (PLAT_OVER_MNGR_DATA), (UINT8 *) FakeNvData)) {
1342       return EFI_NOT_FOUND;
1343     }
1344
1345     if (KeyValue == KEY_VALUE_DEVICE_REFRESH ||
1346         KeyValue == KEY_VALUE_DEVICE_FILTER ||
1347         KeyValue == KEY_VALUE_DRIVER_GOTO_PREVIOUS
1348         ) {
1349       UpdateDeviceSelectPage (Private, KeyValue, FakeNvData);
1350       //
1351       // Update page title string
1352       //
1353       NewStringToken = STRING_TOKEN (STR_TITLE);
1354       if (HiiSetString (Private->RegisteredHandle, NewStringToken, L"First, Select the controller by device path", NULL) == 0) {
1355         ASSERT (FALSE);
1356       }
1357     }
1358
1359     if (((KeyValue >= KEY_VALUE_DEVICE_OFFSET) && (KeyValue < KEY_VALUE_DEVICE_MAX)) || (KeyValue == KEY_VALUE_ORDER_GOTO_PREVIOUS)) {
1360       if (KeyValue == KEY_VALUE_ORDER_GOTO_PREVIOUS) {
1361         KeyValue = (EFI_QUESTION_ID) (mSelectedCtrIndex + KEY_VALUE_DEVICE_OFFSET);
1362       }
1363       UpdateBindingDriverSelectPage (Private, KeyValue, FakeNvData);
1364       //
1365       // Update page title string
1366       //
1367       NewStringToken = STRING_TOKEN (STR_TITLE);
1368       if (HiiSetString (Private->RegisteredHandle, NewStringToken, L"Second, Select drivers for the previous selected controller", NULL) == 0) {
1369         ASSERT (FALSE);
1370       }
1371     }
1372
1373     if (KeyValue == KEY_VALUE_DRIVER_GOTO_ORDER) {
1374       UpdatePrioritySelectPage (Private, KeyValue, FakeNvData);
1375       //
1376       // Update page title string
1377       //
1378       NewStringToken = STRING_TOKEN (STR_TITLE);
1379       if (HiiSetString (Private->RegisteredHandle, NewStringToken, L"Finally, Set the priority order for the drivers and save them", NULL) == 0) {
1380         ASSERT (FALSE);
1381       }
1382     }
1383
1384     if (KeyValue == KEY_VALUE_ORDER_SAVE_AND_EXIT) {
1385       Status = CommintChanges (Private, KeyValue, FakeNvData);
1386       *ActionRequest = EFI_BROWSER_ACTION_REQUEST_SUBMIT;
1387       if (EFI_ERROR (Status)) {
1388         CreatePopUp (EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE, &Key, L"Single Override Info too large, Saving Error!", NULL);
1389         return EFI_DEVICE_ERROR;
1390       }
1391     }
1392
1393     if (KeyValue == KEY_VALUE_DEVICE_CLEAR) {
1394       //
1395       // Deletes all environment variable(s) that contain the override mappings info
1396       //
1397       FreeMappingDatabase (&mMappingDataBase);
1398       Status = SaveOverridesMapping (&mMappingDataBase);
1399       UpdateDeviceSelectPage (Private, KeyValue, FakeNvData);
1400     }
1401     //
1402     // Pass changed uncommitted data back to Form Browser
1403     //
1404     HiiSetBrowserData (&mPlatformOverridesManagerGuid, mVariableName, sizeof (PLAT_OVER_MNGR_DATA), (UINT8 *) FakeNvData, NULL);
1405
1406     return EFI_SUCCESS;
1407   }
1408
1409   //
1410   // All other action return unsupported.
1411   //
1412   return EFI_UNSUPPORTED;
1413 }
1414
1415 /**
1416   Retrieves the image handle of the platform override driver for a controller in the system.
1417
1418   @param  This                   A pointer to the
1419                                  EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL instance.
1420   @param  ControllerHandle       The device handle of the controller to check if a
1421                                  driver override exists.
1422   @param  DriverImageHandle      On input, a pointer to the previous driver image
1423                                  handle returned by GetDriver().  On output, a
1424                                  pointer to the next driver image handle. Passing
1425                                  in a NULL,  will return the first driver image
1426                                  handle for ControllerHandle.
1427
1428   @retval EFI_SUCCESS            The driver override for ControllerHandle was
1429                                  returned in DriverImageHandle.
1430   @retval EFI_NOT_FOUND          A driver override for ControllerHandle was not
1431                                  found.
1432   @retval EFI_INVALID_PARAMETER  The handle specified by ControllerHandle is NULL.
1433                                  DriverImageHandle is not a handle that was returned
1434                                  on a previous  call to GetDriver().
1435
1436 **/
1437 EFI_STATUS
1438 EFIAPI
1439 GetDriver (
1440   IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL              *This,
1441   IN     EFI_HANDLE                                     ControllerHandle,
1442   IN OUT EFI_HANDLE                                     *DriverImageHandle
1443   )
1444 {
1445   EFI_STATUS  Status;
1446
1447   //
1448   // Check that ControllerHandle is a valid handle
1449   //
1450   if (ControllerHandle == NULL) {
1451     return EFI_INVALID_PARAMETER;
1452   }
1453
1454   //
1455   // Read the environment variable(s) that contain the override mappings from Controller Device Path to
1456   // a set of Driver Device Paths, and  initialize in memory database of the overrides that map Controller
1457   // Device Paths to an ordered set of Driver Device Paths and Driver Handles. This action is only performed
1458   // once and finished in first call.
1459   //
1460   if (!mEnvironmentVariableRead) {
1461     mEnvironmentVariableRead = TRUE;
1462
1463     Status = InitOverridesMapping (&mMappingDataBase);
1464     if (EFI_ERROR (Status)){
1465       DEBUG ((DEBUG_ERROR, "The status to Get Platform Driver Override Variable is %r\n", Status));
1466       InitializeListHead (&mMappingDataBase);
1467       return EFI_NOT_FOUND;
1468     }
1469   }
1470
1471   //
1472   // if the environment variable does not exist, just return not found
1473   //
1474   if (IsListEmpty (&mMappingDataBase)) {
1475     return EFI_NOT_FOUND;
1476   }
1477
1478   return GetDriverFromMapping (
1479             ControllerHandle,
1480             DriverImageHandle,
1481             &mMappingDataBase,
1482             mCallerImageHandle
1483             );
1484 }
1485
1486 /**
1487   Retrieves the device path of the platform override driver for a controller in the system.
1488   This driver doesn't support this API.
1489
1490   @param  This                  A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
1491                                 PROTOCOL instance.
1492   @param  ControllerHandle      The device handle of the controller to check if a driver override
1493                                 exists.
1494   @param  DriverImagePath       On input, a pointer to the previous driver device path returned by
1495                                 GetDriverPath(). On output, a pointer to the next driver
1496                                 device path. Passing in a pointer to NULL, will return the first
1497                                 driver device path for ControllerHandle.
1498
1499   @retval EFI_UNSUPPORTED
1500 **/
1501 EFI_STATUS
1502 EFIAPI
1503 GetDriverPath (
1504   IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL              *This,
1505   IN     EFI_HANDLE                                     ControllerHandle,
1506   IN OUT EFI_DEVICE_PATH_PROTOCOL                       **DriverImagePath
1507   )
1508 {
1509   return EFI_UNSUPPORTED;
1510 }
1511
1512
1513 /**
1514   Used to associate a driver image handle with a device path that was returned on a prior call to the
1515   GetDriverPath() service. This driver image handle will then be available through the
1516   GetDriver() service. This driver doesn't support this API.
1517
1518   @param  This                  A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
1519                                 PROTOCOL instance.
1520   @param  ControllerHandle      The device handle of the controller.
1521   @param  DriverImagePath       A pointer to the driver device path that was returned in a prior
1522                                 call to GetDriverPath().
1523   @param  DriverImageHandle     The driver image handle that was returned by LoadImage()
1524                                 when the driver specified by DriverImagePath was loaded
1525                                 into memory.
1526
1527   @retval EFI_UNSUPPORTED
1528 **/
1529 EFI_STATUS
1530 EFIAPI
1531 DriverLoaded (
1532   IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL          *This,
1533   IN EFI_HANDLE                                     ControllerHandle,
1534   IN EFI_DEVICE_PATH_PROTOCOL                       *DriverImagePath,
1535   IN EFI_HANDLE                                     DriverImageHandle
1536   )
1537 {
1538   return EFI_UNSUPPORTED;
1539 }
1540
1541 /**
1542   The driver Entry Point. The funciton will export a disk device class formset and
1543   its callback function to hii database.
1544
1545   @param  ImageHandle    The firmware allocated handle for the EFI image.
1546   @param  SystemTable    A pointer to the EFI System Table.
1547
1548   @retval EFI_SUCCESS    The entry point is executed successfully.
1549   @retval other          Some error occurs when executing this entry point.
1550
1551 **/
1552 EFI_STATUS
1553 EFIAPI
1554 PlatDriOverrideDxeInit (
1555   IN EFI_HANDLE                   ImageHandle,
1556   IN EFI_SYSTEM_TABLE             *SystemTable
1557   )
1558 {
1559   EFI_STATUS                  Status;
1560   EFI_FORM_BROWSER2_PROTOCOL  *FormBrowser2;
1561   VOID                        *Instance;
1562
1563   //
1564   // There should only be one Form Configuration protocol
1565   //
1566   Status = gBS->LocateProtocol (
1567                  &gEfiFormBrowser2ProtocolGuid,
1568                  NULL,
1569                  (VOID **) &FormBrowser2
1570                  );
1571   if (EFI_ERROR (Status)) {
1572     return Status;
1573   }
1574
1575   //
1576   // According to UEFI spec, there can be at most a single instance
1577   // in the system of the EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL.
1578   // So here we check the existence.
1579   //
1580   Status = gBS->LocateProtocol (
1581                   &gEfiPlatformDriverOverrideProtocolGuid,
1582                   NULL,
1583                   &Instance
1584                   );
1585   //
1586   // If there was no error, assume there is an installation and return error
1587   //
1588   if (!EFI_ERROR (Status)) {
1589     return EFI_ALREADY_STARTED;
1590   }
1591
1592   mCallerImageHandle = ImageHandle;
1593   mCallbackInfo = AllocateZeroPool (sizeof (EFI_CALLBACK_INFO));
1594   if (mCallbackInfo == NULL) {
1595     return EFI_BAD_BUFFER_SIZE;
1596   }
1597
1598   mCallbackInfo->Signature = EFI_CALLBACK_INFO_SIGNATURE;
1599   mCallbackInfo->ConfigAccess.ExtractConfig = PlatOverMngrExtractConfig;
1600   mCallbackInfo->ConfigAccess.RouteConfig   = PlatOverMngrRouteConfig;
1601   mCallbackInfo->ConfigAccess.Callback      = PlatOverMngrCallback;
1602   mCallbackInfo->PlatformDriverOverride.GetDriver      = GetDriver;
1603   mCallbackInfo->PlatformDriverOverride.GetDriverPath  = GetDriverPath;
1604   mCallbackInfo->PlatformDriverOverride.DriverLoaded   = DriverLoaded;
1605   //
1606   // Install Device Path Protocol and Config Access protocol to driver handle
1607   // Install Platform Driver Override Protocol to driver handle
1608   //
1609   Status = gBS->InstallMultipleProtocolInterfaces (
1610                   &mCallbackInfo->DriverHandle,
1611                   &gEfiDevicePathProtocolGuid,
1612                   &mHiiVendorDevicePath,
1613                   &gEfiHiiConfigAccessProtocolGuid,
1614                   &mCallbackInfo->ConfigAccess,
1615                   &gEfiPlatformDriverOverrideProtocolGuid,
1616                   &mCallbackInfo->PlatformDriverOverride,
1617                   NULL
1618                   );
1619   if (EFI_ERROR (Status)) {
1620     goto Finish;
1621   }
1622
1623   //
1624   // Publish our HII data
1625   //
1626   mCallbackInfo->RegisteredHandle = HiiAddPackages (
1627                                      &mPlatformOverridesManagerGuid,
1628                                      mCallbackInfo->DriverHandle,
1629                                      VfrBin,
1630                                      PlatDriOverrideDxeStrings,
1631                                      NULL
1632                                      );
1633   if (mCallbackInfo->RegisteredHandle == NULL) {
1634     Status = EFI_OUT_OF_RESOURCES;
1635     goto Finish;
1636   }
1637
1638   //
1639   // Locate ConfigRouting protocol
1640   //
1641   Status = gBS->LocateProtocol (
1642                   &gEfiHiiConfigRoutingProtocolGuid,
1643                   NULL,
1644                   (VOID **) &mCallbackInfo->HiiConfigRouting
1645                   );
1646   if (EFI_ERROR (Status)) {
1647     goto Finish;
1648   }
1649
1650   //
1651   // Clear all the globle variable
1652   //
1653   mDriverImageHandleCount = 0;
1654   mCurrentPage = 0;
1655   ZeroMem (mDriverImageToken, MAX_CHOICE_NUM * sizeof (EFI_STRING_ID));
1656   ZeroMem (mDriverImageFilePathToken, MAX_CHOICE_NUM * sizeof (EFI_STRING_ID));
1657   ZeroMem (mControllerToken, MAX_CHOICE_NUM * sizeof (EFI_STRING_ID));
1658   ZeroMem (mDriverImageProtocol, MAX_CHOICE_NUM * sizeof (EFI_LOADED_IMAGE_PROTOCOL *));
1659
1660   return EFI_SUCCESS;
1661
1662 Finish:
1663   PlatDriOverrideDxeUnload (ImageHandle);
1664
1665   return Status;
1666 }
1667
1668 /**
1669   Unload its installed protocol.
1670
1671   @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
1672
1673   @retval EFI_SUCCESS           The image has been unloaded.
1674 **/
1675 EFI_STATUS
1676 EFIAPI
1677 PlatDriOverrideDxeUnload (
1678   IN EFI_HANDLE  ImageHandle
1679   )
1680 {
1681   ASSERT (mCallbackInfo != NULL);
1682
1683   if (mCallbackInfo->DriverHandle != NULL) {
1684     gBS->UninstallMultipleProtocolInterfaces (
1685            mCallbackInfo->DriverHandle,
1686            &gEfiDevicePathProtocolGuid,
1687            &mHiiVendorDevicePath,
1688            &gEfiHiiConfigAccessProtocolGuid,
1689            &mCallbackInfo->ConfigAccess,
1690            &gEfiPlatformDriverOverrideProtocolGuid,
1691            &mCallbackInfo->PlatformDriverOverride,
1692            NULL
1693            );
1694   }
1695
1696   if (mCallbackInfo->RegisteredHandle != NULL) {
1697     HiiRemovePackages (mCallbackInfo->RegisteredHandle);
1698   }
1699
1700   FreePool (mCallbackInfo);
1701
1702   return EFI_SUCCESS;
1703 }