/** @file
  HII Config Access protocol implementation of RamDiskDxe driver.

  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
  (C) Copyright 2016-2018 Hewlett Packard Enterprise Development LP<BR>
  Copyright (c) Microsoft Corporation.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "RamDiskImpl.h"

CHAR16  mRamDiskStorageName[] = L"RAM_DISK_CONFIGURATION";

RAM_DISK_CONFIG_PRIVATE_DATA  mRamDiskConfigPrivateDataTemplate = {
  RAM_DISK_CONFIG_PRIVATE_DATA_SIGNATURE,
  {
    EFI_PAGE_SIZE,
    RAM_DISK_BOOT_SERVICE_DATA_MEMORY
  },
  {
    RamDiskExtractConfig,
    RamDiskRouteConfig,
    RamDiskCallback
  }
};

HII_VENDOR_DEVICE_PATH  mRamDiskHiiVendorDevicePath = {
  {
    {
      HARDWARE_DEVICE_PATH,
      HW_VENDOR_DP,
      {
        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),
        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
      }
    },
    RAM_DISK_FORM_SET_GUID
  },
  {
    END_DEVICE_PATH_TYPE,
    END_ENTIRE_DEVICE_PATH_SUBTYPE,
    {
      (UINT8)(END_DEVICE_PATH_LENGTH),
      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
    }
  }
};

/**
  This function publish the RAM disk configuration Form.

  @param[in, out]  ConfigPrivateData
                             Points to RAM disk configuration private data.

  @retval EFI_SUCCESS             HII Form is installed successfully.
  @retval EFI_OUT_OF_RESOURCES    Not enough resource for HII Form installation.
  @retval Others                  Other errors as indicated.

**/
EFI_STATUS
InstallRamDiskConfigForm (
  IN OUT RAM_DISK_CONFIG_PRIVATE_DATA  *ConfigPrivateData
  )
{
  EFI_STATUS                      Status;
  EFI_HII_HANDLE                  HiiHandle;
  EFI_HANDLE                      DriverHandle;
  EFI_HII_CONFIG_ACCESS_PROTOCOL  *ConfigAccess;

  DriverHandle = NULL;
  ConfigAccess = &ConfigPrivateData->ConfigAccess;
  Status       = gBS->InstallMultipleProtocolInterfaces (
                        &DriverHandle,
                        &gEfiDevicePathProtocolGuid,
                        &mRamDiskHiiVendorDevicePath,
                        &gEfiHiiConfigAccessProtocolGuid,
                        ConfigAccess,
                        NULL
                        );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  ConfigPrivateData->DriverHandle = DriverHandle;

  //
  // Publish the HII package list
  //
  HiiHandle = HiiAddPackages (
                &gRamDiskFormSetGuid,
                DriverHandle,
                RamDiskDxeStrings,
                RamDiskHiiBin,
                NULL
                );
  if (HiiHandle == NULL) {
    gBS->UninstallMultipleProtocolInterfaces (
           DriverHandle,
           &gEfiDevicePathProtocolGuid,
           &mRamDiskHiiVendorDevicePath,
           &gEfiHiiConfigAccessProtocolGuid,
           ConfigAccess,
           NULL
           );
    return EFI_OUT_OF_RESOURCES;
  }

  ConfigPrivateData->HiiHandle = HiiHandle;

  return EFI_SUCCESS;
}

/**
  This function removes RAM disk configuration Form.

  @param[in, out]  ConfigPrivateData
                             Points to RAM disk configuration private data.

**/
VOID
UninstallRamDiskConfigForm (
  IN OUT RAM_DISK_CONFIG_PRIVATE_DATA  *ConfigPrivateData
  )
{
  //
  // Uninstall HII package list
  //
  if (ConfigPrivateData->HiiHandle != NULL) {
    HiiRemovePackages (ConfigPrivateData->HiiHandle);
    ConfigPrivateData->HiiHandle = NULL;
  }

  //
  // Uninstall HII Config Access Protocol
  //
  if (ConfigPrivateData->DriverHandle != NULL) {
    gBS->UninstallMultipleProtocolInterfaces (
           ConfigPrivateData->DriverHandle,
           &gEfiDevicePathProtocolGuid,
           &mRamDiskHiiVendorDevicePath,
           &gEfiHiiConfigAccessProtocolGuid,
           &ConfigPrivateData->ConfigAccess,
           NULL
           );
    ConfigPrivateData->DriverHandle = NULL;
  }

  FreePool (ConfigPrivateData);
}

/**
  Unregister all registered RAM disks.

**/
VOID
UnregisterAllRamDisks (
  VOID
  )
{
  LIST_ENTRY             *Entry;
  LIST_ENTRY             *NextEntry;
  RAM_DISK_PRIVATE_DATA  *PrivateData;

  if (!IsListEmpty (&RegisteredRamDisks)) {
    BASE_LIST_FOR_EACH_SAFE (Entry, NextEntry, &RegisteredRamDisks) {
      PrivateData = RAM_DISK_PRIVATE_FROM_THIS (Entry);

      gBS->UninstallMultipleProtocolInterfaces (
             PrivateData->Handle,
             &gEfiBlockIoProtocolGuid,
             &PrivateData->BlockIo,
             &gEfiBlockIo2ProtocolGuid,
             &PrivateData->BlockIo2,
             &gEfiDevicePathProtocolGuid,
             (EFI_DEVICE_PATH_PROTOCOL *)PrivateData->DevicePath,
             NULL
             );

      RemoveEntryList (&PrivateData->ThisInstance);

      if (RamDiskCreateHii == PrivateData->CreateMethod) {
        //
        // If a RAM disk is created within HII, then the RamDiskDxe driver
        // driver is responsible for freeing the allocated memory for the
        // RAM disk.
        //
        FreePool ((VOID *)(UINTN)PrivateData->StartingAddr);
      }

      FreePool (PrivateData->DevicePath);
      FreePool (PrivateData);
    }
  }
}

/**
  This function allows a caller to extract the current configuration for one
  or more named elements from the target driver.

  @param[in]  This           Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param[in]  Request        A null-terminated Unicode string in
                             <ConfigRequest> format.
  @param[out] Progress       On return, points to a character in the Request
                             string. Points to the string's null terminator if
                             request was successful. Points to the most recent
                             '&' before the first failing name/value pair (or
                             the beginning of the string if the failure is in
                             the first name/value pair) if the request was not
                             successful.
  @param[out] Results        A null-terminated Unicode string in
                             <ConfigAltResp> format which has all values filled
                             in for the names in the Request string. String to
                             be allocated by the called function.

  @retval EFI_SUCCESS             The Results is filled with the requested
                                  values.
  @retval EFI_OUT_OF_RESOURCES    Not enough memory to store the results.
  @retval EFI_INVALID_PARAMETER   Request is illegal syntax, or unknown name.
  @retval EFI_NOT_FOUND           Routing data doesn't match any storage in
                                  this driver.

**/
EFI_STATUS
EFIAPI
RamDiskExtractConfig (
  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
  IN CONST EFI_STRING                      Request,
  OUT EFI_STRING                           *Progress,
  OUT EFI_STRING                           *Results
  )
{
  if ((Progress == NULL) || (Results == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  *Progress = Request;
  return EFI_NOT_FOUND;
}

/**
  This function processes the results of changes in configuration.

  @param[in]  This           Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param[in]  Configuration  A null-terminated Unicode string in <ConfigResp>
                             format.
  @param[out] Progress       A pointer to a string filled in with the offset of
                             the most recent '&' before the first failing
                             name/value pair (or the beginning of the string if
                             the failure is in the first name/value pair) or
                             the terminating NULL if all was successful.

  @retval EFI_SUCCESS             The Results is processed successfully.
  @retval EFI_INVALID_PARAMETER   Configuration is NULL.
  @retval EFI_NOT_FOUND           Routing data doesn't match any storage in
                                  this driver.

**/
EFI_STATUS
EFIAPI
RamDiskRouteConfig (
  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
  IN CONST EFI_STRING                      Configuration,
  OUT EFI_STRING                           *Progress
  )
{
  if ((Configuration == NULL) || (Progress == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  *Progress = Configuration;

  return EFI_NOT_FOUND;
}

/**
  Allocate memory and register the RAM disk created within RamDiskDxe
  driver HII.

  @param[in] Size            If creating raw, size of the RAM disk to create.
                             If creating from file, zero.
  @param[in] FileHandle      If creating raw, NULL. If creating from file, the
                             file handle.
  @param[in] MemoryType      Type of memory to be used to create RAM Disk.

  @retval EFI_SUCCESS             RAM disk is created and registered.
  @retval EFI_OUT_OF_RESOURCES    Not enough storage is available to match the
                                  size required.

**/
EFI_STATUS
HiiCreateRamDisk (
  IN UINT64           Size,
  IN EFI_FILE_HANDLE  FileHandle,
  IN UINT8            MemoryType
  )
{
  EFI_STATUS                Status;
  UINTN                     BufferSize;
  UINT64                    *StartingAddr;
  EFI_INPUT_KEY             Key;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  RAM_DISK_PRIVATE_DATA     *PrivateData;
  EFI_FILE_INFO             *FileInformation;

  FileInformation = NULL;
  StartingAddr    = NULL;

  if (FileHandle != NULL) {
    //
    // Create from file.
    //
    FileInformation = FileInfo (FileHandle);
    if (NULL == FileInformation) {
      do {
        CreatePopUp (
          EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
          &Key,
          L"",
          L"Not enough memory to get the file information!",
          L"Press ENTER to continue ...",
          L"",
          NULL
          );
      } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

      return EFI_OUT_OF_RESOURCES;
    }

    //
    // Update the size of RAM disk according to the file size.
    //
    Size = FileInformation->FileSize;
  }

  if (Size > (UINTN)-1) {
    do {
      CreatePopUp (
        EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
        &Key,
        L"",
        L"The given RAM disk size is too large!",
        L"Press ENTER to continue ...",
        L"",
        NULL
        );
    } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

    return EFI_OUT_OF_RESOURCES;
  }

  if (MemoryType == RAM_DISK_BOOT_SERVICE_DATA_MEMORY) {
    Status = gBS->AllocatePool (
                    EfiBootServicesData,
                    (UINTN)Size,
                    (VOID **)&StartingAddr
                    );
  } else if (MemoryType == RAM_DISK_RESERVED_MEMORY) {
    Status = gBS->AllocatePool (
                    EfiReservedMemoryType,
                    (UINTN)Size,
                    (VOID **)&StartingAddr
                    );
  } else {
    Status = EFI_INVALID_PARAMETER;
  }

  if ((StartingAddr == NULL) || EFI_ERROR (Status)) {
    do {
      CreatePopUp (
        EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
        &Key,
        L"",
        L"Not enough memory to create the RAM disk!",
        L"Press ENTER to continue ...",
        L"",
        NULL
        );
    } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

    return EFI_OUT_OF_RESOURCES;
  }

  if (FileHandle != NULL) {
    //
    // Copy the file content to the RAM disk.
    //
    BufferSize = (UINTN)Size;
    FileHandle->Read (
                  FileHandle,
                  &BufferSize,
                  (VOID *)(UINTN)StartingAddr
                  );
    if (BufferSize != FileInformation->FileSize) {
      do {
        CreatePopUp (
          EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
          &Key,
          L"",
          L"File content read error!",
          L"Press ENTER to continue ...",
          L"",
          NULL
          );
      } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

      return EFI_DEVICE_ERROR;
    }
  }

  //
  // Register the newly created RAM disk.
  //
  Status = RamDiskRegister (
             ((UINT64)(UINTN)StartingAddr),
             Size,
             &gEfiVirtualDiskGuid,
             NULL,
             &DevicePath
             );
  if (EFI_ERROR (Status)) {
    do {
      CreatePopUp (
        EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
        &Key,
        L"",
        L"Fail to register the newly created RAM disk!",
        L"Press ENTER to continue ...",
        L"",
        NULL
        );
    } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

    return Status;
  }

  //
  // If RAM disk is created within HII, memory should be freed when the
  // RAM disk is unregisterd.
  //
  PrivateData               = RAM_DISK_PRIVATE_FROM_THIS (RegisteredRamDisks.BackLink);
  PrivateData->CreateMethod = RamDiskCreateHii;

  return EFI_SUCCESS;
}

/**
  This function updates the registered RAM disks list on the main form.

  @param[in, out] ConfigPrivate
                             Private data for configurating hii data for RAM
                             disks.

**/
VOID
UpdateMainForm (
  IN OUT RAM_DISK_CONFIG_PRIVATE_DATA  *ConfigPrivate
  )
{
  VOID                   *StartOpCodeHandle;
  VOID                   *EndOpCodeHandle;
  EFI_IFR_GUID_LABEL     *StartLabel;
  EFI_IFR_GUID_LABEL     *EndLabel;
  LIST_ENTRY             *Entry;
  UINTN                  Index;
  RAM_DISK_PRIVATE_DATA  *PrivateData;
  CHAR16                 *String;
  CHAR16                 RamDiskStr[128];
  EFI_STRING_ID          StringId;

  //
  // Init OpCode Handle
  //
  StartOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (StartOpCodeHandle != NULL);

  EndOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (EndOpCodeHandle != NULL);

  //
  // Create Hii Extend Label OpCode as the start opcode
  //
  StartLabel = (EFI_IFR_GUID_LABEL *)HiiCreateGuidOpCode (
                                       StartOpCodeHandle,
                                       &gEfiIfrTianoGuid,
                                       NULL,
                                       sizeof (EFI_IFR_GUID_LABEL)
                                       );
  StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  StartLabel->Number       = MAIN_LABEL_LIST_START;

  //
  // Create Hii Extend Label OpCode as the end opcode
  //
  EndLabel = (EFI_IFR_GUID_LABEL *)HiiCreateGuidOpCode (
                                     EndOpCodeHandle,
                                     &gEfiIfrTianoGuid,
                                     NULL,
                                     sizeof (EFI_IFR_GUID_LABEL)
                                     );
  EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  EndLabel->Number       = MAIN_LABEL_LIST_END;

  Index = 0;
  BASE_LIST_FOR_EACH (Entry, &RegisteredRamDisks) {
    PrivateData             = RAM_DISK_PRIVATE_FROM_THIS (Entry);
    PrivateData->CheckBoxId = (EFI_QUESTION_ID)
                              (MAIN_CHECKBOX_QUESTION_ID_START + Index);
    //
    // CheckBox is unchecked by default.
    //
    PrivateData->CheckBoxChecked = FALSE;
    String                       = RamDiskStr;

    UnicodeSPrint (
      String,
      sizeof (RamDiskStr),
      L"  RAM Disk %d: [0x%lx, 0x%lx]\n",
      Index,
      PrivateData->StartingAddr,
      PrivateData->StartingAddr + PrivateData->Size - 1
      );

    StringId = HiiSetString (ConfigPrivate->HiiHandle, 0, RamDiskStr, NULL);
    ASSERT (StringId != 0);

    HiiCreateCheckBoxOpCode (
      StartOpCodeHandle,
      PrivateData->CheckBoxId,
      0,
      0,
      StringId,
      STRING_TOKEN (STR_RAM_DISK_LIST_HELP),
      EFI_IFR_FLAG_CALLBACK,
      0,
      NULL
      );

    Index++;
  }

  HiiUpdateForm (
    ConfigPrivate->HiiHandle,
    &gRamDiskFormSetGuid,
    MAIN_FORM_ID,
    StartOpCodeHandle,
    EndOpCodeHandle
    );

  HiiFreeOpCodeHandle (StartOpCodeHandle);
  HiiFreeOpCodeHandle (EndOpCodeHandle);
}

/**
  This function processes the results of changes in configuration.

  @param[in]  This           Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param[in]  Action         Specifies the type of action taken by the browser.
  @param[in]  QuestionId     A unique value which is sent to the original
                             exporting driver so that it can identify the type
                             of data to expect.
  @param[in]  Type           The type of value for the question.
  @param[in]  Value          A pointer to the data being sent to the original
                             exporting driver.
  @param[out] ActionRequest  On return, points to the action requested by the
                             callback function.

  @retval EFI_SUCCESS             The callback successfully handled the action.
  @retval EFI_OUT_OF_RESOURCES    Not enough storage is available to hold the
                                  variable and its data.
  @retval EFI_DEVICE_ERROR        The variable could not be saved.
  @retval EFI_UNSUPPORTED         The specified Action is not supported by the
                                  callback.

**/
EFI_STATUS
EFIAPI
RamDiskCallback (
  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
  IN     EFI_BROWSER_ACTION                Action,
  IN     EFI_QUESTION_ID                   QuestionId,
  IN     UINT8                             Type,
  IN     EFI_IFR_TYPE_VALUE                *Value,
  OUT EFI_BROWSER_ACTION_REQUEST           *ActionRequest
  )
{
  EFI_STATUS                    Status;
  RAM_DISK_PRIVATE_DATA         *PrivateData;
  RAM_DISK_CONFIG_PRIVATE_DATA  *ConfigPrivate;
  EFI_DEVICE_PATH_PROTOCOL      *FileDevPath;
  EFI_FILE_HANDLE               FileHandle;
  LIST_ENTRY                    *Entry;
  LIST_ENTRY                    *NextEntry;

  if ((This == NULL) || (Value == NULL) || (ActionRequest == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  ConfigPrivate = RAM_DISK_CONFIG_PRIVATE_FROM_THIS (This);

  if (Action == EFI_BROWSER_ACTION_RETRIEVE) {
    Status = EFI_UNSUPPORTED;
    if (QuestionId == CREATE_RAW_SIZE_QUESTION_ID) {
      Value->u64                      = EFI_PAGE_SIZE;
      ConfigPrivate->ConfigStore.Size = EFI_PAGE_SIZE;
      Status                          = EFI_SUCCESS;
    } else if (QuestionId == CREATE_RAW_MEMORY_TYPE_QUESTION_ID) {
      Value->u8                          = RAM_DISK_BOOT_SERVICE_DATA_MEMORY;
      ConfigPrivate->ConfigStore.MemType = RAM_DISK_BOOT_SERVICE_DATA_MEMORY;
      Status                             = EFI_SUCCESS;
    }

    return Status;
  }

  if ((Action != EFI_BROWSER_ACTION_CHANGED) &&
      (Action != EFI_BROWSER_ACTION_CHANGING) &&
      (Action != EFI_BROWSER_ACTION_FORM_OPEN))
  {
    return EFI_UNSUPPORTED;
  }

  //
  // Update the RAM disk list show at the main form first.
  //
  if (Action == EFI_BROWSER_ACTION_FORM_OPEN) {
    Status = EFI_UNSUPPORTED;
    if (QuestionId == MAIN_GOTO_FILE_EXPLORER_ID) {
      UpdateMainForm (ConfigPrivate);
      Status = EFI_SUCCESS;
    }

    return Status;
  }

  Status = EFI_SUCCESS;

  if (Action == EFI_BROWSER_ACTION_CHANGING) {
    switch (QuestionId) {
      case MAIN_GOTO_FILE_EXPLORER_ID:
        Status = ChooseFile (NULL, NULL, NULL, &FileDevPath);
        if (EFI_ERROR (Status)) {
          break;
        }

        if (FileDevPath != NULL) {
          //
          // Open the file.
          //
          Status = EfiOpenFileByDevicePath (
                     &FileDevPath,
                     &FileHandle,
                     EFI_FILE_MODE_READ,
                     0
                     );
          if (EFI_ERROR (Status)) {
            break;
          }

          //
          // Create from file, RAM disk size is zero. It will be updated
          // according to the file size.
          //
          Status = HiiCreateRamDisk (
                     0,
                     FileHandle,
                     ConfigPrivate->ConfigStore.MemType
                     );
          if (EFI_ERROR (Status)) {
            break;
          }

          //
          // Refresh the registered RAM disks list.
          //
          UpdateMainForm (ConfigPrivate);
        }

        break;

      default:
        break;
    }
  } else if (Action == EFI_BROWSER_ACTION_CHANGED) {
    switch (QuestionId) {
      case MAIN_REMOVE_RD_QUESTION_ID:
        //
        // Remove the selected RAM disks
        //
        BASE_LIST_FOR_EACH_SAFE (Entry, NextEntry, &RegisteredRamDisks) {
          PrivateData = RAM_DISK_PRIVATE_FROM_THIS (Entry);
          if (PrivateData->CheckBoxChecked) {
            RamDiskUnregister (
              (EFI_DEVICE_PATH_PROTOCOL *)PrivateData->DevicePath
              );
          }
        }

        UpdateMainForm (ConfigPrivate);

        *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_APPLY;
        break;

      case CREATE_RAW_SIZE_QUESTION_ID:
        ConfigPrivate->ConfigStore.Size = Value->u64;
        break;

      case CREATE_RAW_MEMORY_TYPE_QUESTION_ID:
        ConfigPrivate->ConfigStore.MemType = Value->u8;
        break;

      case CREATE_RAW_SUBMIT_QUESTION_ID:
        //
        // Create raw, FileHandle is NULL.
        //
        Status = HiiCreateRamDisk (
                   ConfigPrivate->ConfigStore.Size,
                   NULL,
                   ConfigPrivate->ConfigStore.MemType
                   );
        if (EFI_ERROR (Status)) {
          break;
        }

        //
        // Refresh the registered RAM disks list.
        //
        UpdateMainForm (ConfigPrivate);

        *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
        break;

      case CREATE_RAW_DISCARD_QUESTION_ID:
        *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
        break;

      default:
        //
        // QuestionIds for checkboxes
        //
        if ((QuestionId >= MAIN_CHECKBOX_QUESTION_ID_START) &&
            (QuestionId < CREATE_RAW_RAM_DISK_FORM_ID))
        {
          BASE_LIST_FOR_EACH (Entry, &RegisteredRamDisks) {
            PrivateData = RAM_DISK_PRIVATE_FROM_THIS (Entry);
            if (PrivateData->CheckBoxId == QuestionId) {
              PrivateData->CheckBoxChecked = (BOOLEAN)(Value->u8 != 0);
            }
          }
        }

        break;
    }
  }

  return EFI_SUCCESS;
}