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alder_lake_bios/Insyde/InsydeModulePkg/Universal/FileAccess/FileAccessPei/FileAccessPei.c

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/** @file
Implementation of file access PEIM
;******************************************************************************
;* Copyright (c) 2014 - 2021, Insyde Software Corporation. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
*/
#include "FatPeim.h"
PEI_FAT_PRIVATE_DATA *mPrivateData = NULL;
EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiVirtualBlockIoPpiGuid,
BlockIoNotifyEntry
};
/**
Find the descriptors from PpiDescriptor1 that matched PpiDescriptor2
@param PpiDescriptor1 Ppi Descriptor that used to compare
@param PpiDescriptor2 Ppi Descriptor that used to compare
@retval EFI_SUCCESS Found matching Ppi Descriptor.
@retval EFI_NOT_FOUND Fail to found matching Ppi Descriptor.
**/
EFI_STATUS
FindMatchPpiDescriptor (
IN EFI_PEI_PPI_DESCRIPTOR *PpiDescriptor1,
IN EFI_PEI_PPI_DESCRIPTOR *PpiDescriptor2
)
{
UINTN Index;
for (Index = 0; PpiDescriptor1[Index].Flags != (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST); Index++) {
if (PpiDescriptor2 == &PpiDescriptor1[Index]) {
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Discover all the block I/O devices to find the FAT volume.
@param PrivateData Global memory map for accessing global
variables.
@retval EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
UpdateBlocksAndVolumes (
PEI_FAT_PRIVATE_DATA *PrivateData
)
{
EFI_STATUS Status;
EFI_PEI_PPI_DESCRIPTOR *BlockIoPpiDescriptor;
EFI_PEI_PPI_DESCRIPTOR *H2OBlockIoPpiDescriptor;
UINTN BlockIoPpiInstance;
UINTN H2OBlockIoPpiInstance;
EFI_PEI_RECOVERY_BLOCK_IO_PPI *BlockIoPpi;
H2O_PEI_BLOCK_IO_PPI *H2OBlockIoPpi;
UINTN NumberBlockDevices;
UINTN Index;
EFI_PEI_BLOCK_IO_MEDIA Media;
PEI_FAT_VOLUME Volume;
EFI_PEI_SERVICES **PeiServices;
PeiServices = (EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
BlockIoPpi = NULL;
H2OBlockIoPpi = NULL;
//
// Clean up caches
//
for (Index = 0; Index < PEI_FAT_CACHE_SIZE; Index++) {
PrivateData->CacheBuffer[Index].Valid = FALSE;
}
PrivateData->BlockDeviceCount = 0;
//
// Find out all Block Io Ppi instances within the system
// Assuming all device Block Io Peims are dispatched already
//
for (BlockIoPpiInstance = 0; BlockIoPpiInstance < PEI_FAT_MAX_BLOCK_IO_PPI; BlockIoPpiInstance++) {
Status = PeiServicesLocatePpi (
&gEfiPeiVirtualBlockIoPpiGuid,
BlockIoPpiInstance,
&BlockIoPpiDescriptor,
(VOID **)&BlockIoPpi
);
if (EFI_ERROR (Status)) {
//
// Done with all Block Io Ppis
//
break;
}
H2OBlockIoPpiInstance = 0;
for (H2OBlockIoPpiInstance = 0, H2OBlockIoPpi = NULL; H2OBlockIoPpiInstance < PEI_FAT_MAX_BLOCK_IO_PPI; H2OBlockIoPpiInstance++) {
Status = PeiServicesLocatePpi (
&gH2OPeiVirtualBlockIoPpiGuid,
H2OBlockIoPpiInstance,
&H2OBlockIoPpiDescriptor,
(VOID **)&H2OBlockIoPpi
);
if (EFI_ERROR (Status)) {
H2OBlockIoPpi = NULL;
break;
}
if (H2OBlockIoPpiDescriptor > BlockIoPpiDescriptor) {
Status = FindMatchPpiDescriptor (BlockIoPpiDescriptor, H2OBlockIoPpiDescriptor);
} else {
Status = FindMatchPpiDescriptor (H2OBlockIoPpiDescriptor, BlockIoPpiDescriptor);
}
if (!EFI_ERROR(Status)) {
break;
}
H2OBlockIoPpiInstance++;
}
Status = BlockIoPpi->GetNumberOfBlockDevices (
PeiServices,
BlockIoPpi,
&NumberBlockDevices
);
if (EFI_ERROR (Status)) {
continue;
}
//
// According to PI spec, the device index is from 1 to NumberBlockDevices. However, there are some existing
// gEfiPeiVirtualBlockIoPpiGuid uses device index from 0 to NumberBlockDevices - 1. To make the code can be
// Compatible with PI Spec and existing PPIs, try to find from 0 to NumberBlockDevices.
//
for (Index = 0; Index < NumberBlockDevices + 1 && PrivateData->BlockDeviceCount < PEI_FAT_MAX_BLOCK_DEVICE; Index++) {
Status = BlockIoPpi->GetBlockDeviceMediaInfo (
PeiServices,
BlockIoPpi,
Index,
&Media
);
if (EFI_ERROR (Status) || !Media.MediaPresent) {
continue;
}
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].BlockSize = (UINT32) Media.BlockSize;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].LastBlock = Media.LastBlock;
switch ((UINTN)Media.DeviceType) {
case LegacyFloppy:
case IdeCDROM:
case IdeLS120:
case UsbMassStorage:
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].IoAlign = 0;
break;
default:
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].IoAlign = 4;
break;
}
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].Logical = FALSE;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].PartitionChecked = FALSE;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].BlockIo = BlockIoPpi;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].H2OBlockIo = H2OBlockIoPpi;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].PhysicalDevNo = (UINT8) Index;
PrivateData->BlockDevice[PrivateData->BlockDeviceCount].DevType = Media.DeviceType;
PrivateData->BlockDeviceCount++;
}
}
//
// Find out all logical devices
//
FatFindPartitions (PrivateData);
//
// Build up file system volume array
//
PrivateData->VolumeCount = 0;
for (Index = 0; Index < PrivateData->BlockDeviceCount; Index++) {
ZeroMem (&Volume, sizeof (PEI_FAT_VOLUME));
Volume.BlockDeviceNo = Index;
Status = FatGetBpbInfo (PrivateData, &Volume);
if (Status == EFI_SUCCESS) {
//
// Add the detected volume to the volume array
//
(*PeiServices)->CopyMem (
(UINT8 *) &(PrivateData->Volume[PrivateData->VolumeCount]),
(UINT8 *) &Volume,
sizeof (PEI_FAT_VOLUME)
);
PrivateData->VolumeCount += 1;
if (PrivateData->VolumeCount >= PEI_FAT_MAX_VOLUME) {
break;
}
}
}
return EFI_SUCCESS;
}
/**
BlockIo installation notification function. Find out all the current BlockIO
PPIs in the system and add them into private data.
@param PeiServices General purpose services available to every
PEIM.
@param NotifyDescriptor The typedef structure of the notification
descriptor. Not used in this function.
@param Ppi The typedef structure of the PPI descriptor.
Not used in this function.
@retval EFI_SUCCESS The function completed successfully.
**/
EFI_STATUS
EFIAPI
BlockIoNotifyEntry (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
UpdateBlocksAndVolumes (mPrivateData);
return EFI_SUCCESS;
}
/**
Perform File Access Init.
@param [in] FileHandle Handle of the file being invoked.
@param [in] PeiServices General purpose services available to every PEIM.
@retval EFI Status
**/
EFI_STATUS
EFIAPI
FileAccessPeiEntry (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Address;
PEI_FAT_PRIVATE_DATA *PrivateData;
Status = PeiServicesRegisterForShadow (FileHandle);
if (!EFI_ERROR (Status)) {
return Status;
}
//
// Allocate private data space
//
Status = (**PeiServices).AllocatePages (
PeiServices,
EfiBootServicesCode,
(sizeof (PEI_FAT_PRIVATE_DATA) - 1) / PEI_FAT_MEMMORY_PAGE_SIZE + 1,
&Address
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
PrivateData = (PEI_FAT_PRIVATE_DATA *) (UINTN) Address;
//
// Initialize Private Data (to zero, as is required by subsequent operations)
//
(*PeiServices)->SetMem ((UINT8 *) PrivateData, sizeof (PEI_FAT_PRIVATE_DATA), 0);
PrivateData->Signature = PEI_FAT_PRIVATE_DATA_SIGNATURE;
PrivateData->PeiServices = (EFI_PEI_SERVICES **)PeiServices;
//
// Allocate zero pool space
//
Status = (**PeiServices).AllocatePool (
PeiServices,
PEI_FAT_MAX_BLOCK_SIZE,
(VOID**)&PrivateData->ZeroPool
);
if (EFI_ERROR(Status)) {
return Status;
}
(**PeiServices).SetMem (PrivateData->ZeroPool, PEI_FAT_MAX_BLOCK_SIZE, 0);
//
// Installs Ppi
//
PrivateData->PeiFileAccessPpi.OpenFile = OpenFile;
PrivateData->PeiFileAccessPpi.ReadFile = ReadFileData;
PrivateData->PeiFileAccessPpi.WriteFile = WriteFile;
PrivateData->PeiFileAccessPpi.CloseFile = CloseFile;
PrivateData->PeiFileAccessPpi.SetPosition = SetPosition;
PrivateData->PeiFileAccessPpi.GetPosition = GetPosition;
PrivateData->PeiFileAccessPpi.GetFileInfo = GetFileInfo;
PrivateData->PeiFileAccessPpi.GetVolumeInfo = GetVolumeInfo;
PrivateData->PeiFileAccessPpi.GetNumberOfVolumes = GetNumberOfVolumes;
PrivateData->PeiFileAccessPpi.GetRecoveryBlockInfo = GetRecoveryBlockInfo;
PrivateData->PeiFileAccessPpi.GetRecoveryBlockType = GetRecoveryBlockType;
PrivateData->PeiFileAccessPpi.GetRecoveryLogical = GetRecoveryLogical;
PrivateData->PpiDescriptor.Flags = (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);
PrivateData->PpiDescriptor.Guid = &gPeiFileAccessPpiGuid;
PrivateData->PpiDescriptor.Ppi = &PrivateData->PeiFileAccessPpi;
Status = (**PeiServices).InstallPpi (PeiServices, &PrivateData->PpiDescriptor);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
DEBUG ((EFI_D_INFO, "Install gPeiFileAccessPpiGuid\n"));
//
// Other initializations
//
PrivateData->BlockDeviceCount = 0;
UpdateBlocksAndVolumes (PrivateData);
//
// PrivateData is allocated now, set it to the module variable
//
mPrivateData = PrivateData;
//
// Installs Block Io Ppi notification function
//
Status = (**PeiServices).NotifyPpi (PeiServices, &mNotifyList);
return Status;
}
/**
Get FAT Volume Information
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] VolumeIndex The index number of the FAT volume
@param[in] BufferSize
@param[out] Buffer
@retval EFI_SUCCESS
@retval EFI_INVALID_PARAMETER
@retval EFI_BUFFER_TOO_SMALL
**/
EFI_STATUS
GetVolumeInfo (
IN PEI_FILE_ACCESS_PPI *This,
IN UINTN VolumeIndex,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
PEI_VOLUME_INFO *VolumeInfo;
PEI_FAT_FILE ParentDir;
FAT_DIRECTORY_ENTRY DirEnt;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
if (VolumeIndex >= PrivateData->VolumeCount) {
return EFI_INVALID_PARAMETER;
}
VolumeInfo = Buffer;
if (*BufferSize < sizeof (PEI_VOLUME_INFO)) {
*BufferSize = sizeof (PEI_VOLUME_INFO);
return EFI_BUFFER_TOO_SMALL;
}
Status = FatGetRootDir (PrivateData, &PrivateData->Volume[VolumeIndex], &ParentDir);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
ParentDir.DirEntryOffset = 0;
Status = FatFindVolumeLabel (PrivateData, &ParentDir, &DirEnt);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
VolumeInfo->FatType = PrivateData->Volume[VolumeIndex].FatType;
VolumeInfo->DevType = PrivateData->BlockDevice[PrivateData->Volume[VolumeIndex].BlockDeviceNo].DevType;
EngFatToStr (11, (CHAR8 *)&DirEnt.FileName, (UINT16 *) VolumeInfo->VolumeLabel);
//
// We don't support volume label currently
//
return EFI_SUCCESS;
}
/**
Get number of FAT volumes
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@return Number of FAT volumes
**/
UINTN
GetNumberOfVolumes (
IN PEI_FILE_ACCESS_PPI *This
)
{
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
return PrivateData->VolumeCount;
}
/**
Get file information
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] Handle The File handle
@param[in,out] BufferSize Input: the given buffer size
Output: the buffer size of the output buffer
@param[out] Buffer The pointer to the PEI_FILE_INFO structure
@retval EFI_SUCCESS File infomation is successfully returned
@retval EFI_INVALID_PARAMETER Invalid file handle
@retval EFI_BUFFER_TOO_SMALL The given Buffer size is too small
**/
EFI_STATUS
GetFileInfo (
IN PEI_FILE_ACCESS_PPI *This,
IN PEI_FILE_HANDLE Handle,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
PEI_FAT_FILE *File;
PEI_FILE_INFO *FileInfo;
UINTN Size;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
File = Handle;
if (!File->Valid) {
return EFI_INVALID_PARAMETER;
}
Size = sizeof (PEI_FILE_INFO) + StrLen (File->FilePath) * 2;
if (*BufferSize < Size) {
*BufferSize = Size;
return EFI_BUFFER_TOO_SMALL;
}
FileInfo = Buffer;
FileInfo->Size = Size;
FileInfo->PhysicalSize = (File->FileSize + File->Volume->ClusterSize - 1) / File->Volume->ClusterSize;
FileInfo->FileSize = File->FileSize;
FileInfo->Attribute = File->Attributes;
CopyMem (
(UINT8 *) FileInfo->FileName,
(UINT8 *) File->FilePath,
StrSize(File->FilePath)
);
//
// Create, Access, Modification time of file are not supported currently
//
return EFI_SUCCESS;
}
/**
Implement Openfile from one volume
@param[in] PrivateData Pointer to the PEI_FAT_PRIVATE_DATA structure
@param[in] VolumeIndex Selet one Volume to open file
@param[in] FileName File name in Unicode string
@param[out] Handle Get the File Handle.
@param[in] OpenMode Read, Write, Create mode
@param[in] Attributes These are the attribute bits for the newly created file.
@retval EFI_SUCCESS File infomation is successfully returned
@retval EFI_INVALID_PARAMETER Invalid file handle
@retval EFI_BUFFER_TOO_SMALL The given Buffer size is too small
@retval EFI_DEVICE_ERROR Can't get root directory
@retval EFI_NOT_FOUND The specified file could not be found on the device.
**/
EFI_STATUS
OpenVolumeAndFile (
IN PEI_FAT_PRIVATE_DATA *PrivateData,
IN UINTN VolumeIndex,
IN CHAR16 *FileName,
OUT PEI_FILE_HANDLE *Handle,
IN UINT64 OpenMode,
IN UINT8 Attributes
)
{
EFI_STATUS Status;
CHAR16 *Path1;
CHAR16 *Path2;
CHAR16 *NewFileName;
CHAR16 TempChar;
PEI_FAT_FILE RootDir;
PEI_FAT_FILE Parent;
PEI_FAT_FILE File;
UINTN Index;
BOOLEAN IsVolumeLabel;
BOOLEAN VolumeLabelValid;
BOOLEAN EndofPath;
PEI_VOLUME_INFO *VolumeInfo;
UINTN BufferSize;
//
// Open the file from the file name
//
if (VolumeIndex >= PrivateData->VolumeCount) {
return EFI_INVALID_PARAMETER;
}
SetMem (&File, sizeof (PEI_FAT_FILE), 0);
SetMem (&RootDir, sizeof (PEI_FAT_FILE), 0);
IsVolumeLabel = FALSE;
VolumeLabelValid = FALSE;
EndofPath = FALSE;
VolumeInfo = NULL;
NewFileName = NULL;
Path1 = FileName;
Path2 = FileName;
Status = FatGetRootDir (PrivateData, &PrivateData->Volume[VolumeIndex], &RootDir);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
Parent = RootDir;
do {
IsVolumeLabel = FALSE;
Status = EFI_NOT_FOUND;
while (*Path1 && *Path1 == '/') {
Path1++;
Path2++;
IsVolumeLabel = TRUE;
}
while (*Path1 && *Path1 == '\\') {
Path1++;
Path2++;
IsVolumeLabel = FALSE;
}
if (*Path1) {
//
// Get one level path
//
while ((*Path2 && *Path2 != '\\') && (*Path2 != ';')) {
Path2++;
}
TempChar = *Path2;
*Path2 = 0;
if (TempChar == 0) {
EndofPath = TRUE;
}
} else {
//
// No more path
//
break;
}
if(IsVolumeLabel) {
//
// Check device Label
//
BufferSize = sizeof (PEI_VOLUME_INFO) + (sizeof(CHAR16) * 11);
(*PrivateData->PeiServices)->AllocatePool (
(CONST EFI_PEI_SERVICES **)PrivateData->PeiServices,
BufferSize,
(VOID**)&VolumeInfo
);
Status = GetVolumeInfo (&PrivateData->PeiFileAccessPpi, VolumeIndex, &BufferSize, VolumeInfo);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
if (!EngStriColl (PrivateData, Path1, VolumeInfo->VolumeLabel)) {
*Path2 = TempChar;
while (*Path2 != ';') {
Path2++;
if (*Path2 == 0) {
break;
}
}
TempChar = *Path2;
}
} else {
//
// Open this Path token
//
Status = FatReadNextSubFile (PrivateData, &Parent, &File);
while (Status == EFI_SUCCESS) {
if ((EngStriColl (PrivateData, Path1, File.FileName)) && (File.Attributes != FAT_ATTR_VOLUME_ID)) {
break;
}
Status = FatReadNextSubFile (PrivateData, &Parent, &File);
}
if (!EFI_ERROR (Status)) {
if (File.FileSize != 0) {
//
// A file name found.
//
NewFileName = Path1;
break;
} else {
//
// A folder name found.
//
CopyMem ((UINT8 *) &Parent, (UINT8 *) &File, sizeof (PEI_FAT_FILE));
}
} else {
//
// Can't find this path.
// If can't find folder name, then find next path from root dir.
//
Parent.CurrentPos = 0;
if (!EndofPath) Parent = RootDir;
}
}
if (TempChar == ';') {
*Path2 = TempChar;
Path2++;
} else {
*Path2 = TempChar;
}
NewFileName = Path1;
Path1 = Path2;
} while (1);
if (EFI_ERROR (Status)) {
//
// Can't found File
//
if (NewFileName == NULL || (OpenMode & EFI_FILE_MODE_CREATE) == 0) {
return EFI_NOT_FOUND;
} else {
//
// Create new File & Get this File Handle
//
Status = FatCreateDirEnt (PrivateData, &Parent, NewFileName, Attributes, &File);
if (EFI_ERROR (Status)) {
return Status;
}
}
}
//
// If the file's attribute is read only, and the open is for
// read-write, then the access is denied.
//
if ((File.Attributes & EFI_FILE_READ_ONLY) != 0 && (File.Attributes & EFI_FILE_DIRECTORY) == 0 && (OpenMode & EFI_FILE_MODE_WRITE)) {
return EFI_ACCESS_DENIED;
}
//
// Find one empty File structure for this open instance
//
for (Index = 0; Index < PEI_FAT_MAX_FILE; Index++) {
if (!PrivateData->File[Index].Valid) {
break;
}
}
if (Index >= PEI_FAT_MAX_FILE) {
return EFI_OUT_OF_RESOURCES;
}
//
// Set this file structure
//
CopyMem ((UINT8 *) &(PrivateData->File[Index]), (UINT8 *) &File, sizeof (PEI_FAT_FILE));
PrivateData->File[Index].Valid = TRUE;
//
// Copy the file path
//
CopyMem (
(UINT8 *) PrivateData->File[Index].FilePath,
(UINT8 *) FileName,
StrLen (FileName) + 1 < FAT_MAX_FILE_PATH_LENGTH ? StrSize (FileName) : 2 * FAT_MAX_FILE_PATH_LENGTH
);
PrivateData->File[Index].FilePath[FAT_MAX_FILE_PATH_LENGTH - 1] = 0;
*Handle = &(PrivateData->File[Index]);
return EFI_SUCCESS;
}
/**
Implement Openfile from one volume
if readmode, all volume will search
in write mode, open first volume
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] FileName File name in Unicode string
@param[out] Handle Get the File Handle.
@param[in] OpenMode Read, Write, Create mode
@param[in] Attributes These are the attribute bits for the newly created file.
@param[in] VolumnIndex The index number of the FAT volume
@retval EFI_SUCCESS File infomation is successfully returned
@retval EFI_INVALID_PARAMETER Invalid file handle
@retval EFI_BUFFER_TOO_SMALL The given Buffer size is too small
@retval EFI_DEVICE_ERROR Can't get root directory
@retval EFI_NOT_FOUND The specified file could not be found on the device.
@retval EFI_NO_MEDIA There have no volume.
**/
EFI_STATUS
OpenFile (
IN PEI_FILE_ACCESS_PPI *This,
IN CHAR16 *FileName,
OUT PEI_FILE_HANDLE *Handle,
IN UINT64 OpenMode,
IN UINT8 Attributes,
IN UINTN VolumnIndex
)
{
EFI_STATUS Status;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
Status = EFI_NO_MEDIA;
//
// Check for a valid mode
//
switch (OpenMode) {
case EFI_FILE_MODE_READ:
case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:
case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE:
break;
default:
return EFI_INVALID_PARAMETER;
}
//
// Check for valid Attributes for file creation case.
//
if (((OpenMode & EFI_FILE_MODE_CREATE) != 0) && (Attributes & (EFI_FILE_READ_ONLY | (~EFI_FILE_VALID_ATTR))) != 0) {
return EFI_INVALID_PARAMETER;
}
if (VolumnIndex >= PrivateData->VolumeCount) {
return EFI_INVALID_PARAMETER;
}
return OpenVolumeAndFile (PrivateData, VolumnIndex, FileName, Handle, OpenMode, Attributes);
}
/**
Read file data
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] Handle The File handle
@param[in] ReadMode File read mode in PEI_FILE_READ_MODE type
@param[in,out] BufferSize Input: the given buffer size
Output: the buffer size of the output buffer
@param[out] Buffer The pointer to the data buffer
@retval EFI_SUCCESS File data is successfully read
@retval EFI_INVALID_PARAMETER Unknown ReadMode given
@retval EFI_NOT_FOUND File not found
@retval EFI_DEVICE_ERROR Failed to access file
@retval EFI_OUT_OF_RESOURCES Out of memory
**/
EFI_STATUS
ReadFileData (
IN PEI_FILE_ACCESS_PPI *This,
IN PEI_FILE_HANDLE Handle,
IN PEI_FILE_READ_MODE ReadMode,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
PEI_FAT_FILE *File;
PEI_FAT_FILE SubFile;
UINT32 OrigPos;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
File = Handle;
if (!File->Valid) {
return EFI_INVALID_PARAMETER;
}
if (ReadMode == ReadData) {
//
// read raw data
//
Status = FatReadFile (PrivateData, Handle, BufferSize, Buffer);
return Status;
} else if (ReadMode == ReadDirEntry) {
//
// read dir entry with BUFFER_TOO_SMALL rollback
//
OrigPos = File->CurrentPos;
Status = FatReadNextSubFile (PrivateData, File, &SubFile);
if (Status == EFI_SUCCESS) {
Status = GetFileInfo (This, &SubFile, BufferSize, Buffer);
}
if (Status == EFI_BUFFER_TOO_SMALL) {
FatSetFilePos (PrivateData, File, OrigPos, TRUE);
}
return Status;
} else if (ReadMode == ReadDirEntryBufferTooSmallOK) {
//
// read dir entry (BUFFER_TOO_SMALL OK)
//
Status = FatReadNextSubFile (PrivateData, File, &SubFile);
if (Status == EFI_SUCCESS) {
Status = GetFileInfo (This, &SubFile, BufferSize, Buffer);
}
return Status;
} else {
return EFI_INVALID_PARAMETER;
}
}
/**
Write data to file
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] Handle The File handle
@param[in] BufferSize Input: the given buffer size
@param[out] Buffer The pointer to the data buffer
@retval EFI_SUCCESS File data is successfully read
@retval EFI_INVALID_PARAMETER Unknown ReadMode given
@retval EFI_NOT_FOUND File not found
@retval EFI_DEVICE_ERROR Failed to access file
@retval EFI_OUT_OF_RESOURCES Out of memory
**/
EFI_STATUS
WriteFile (
IN PEI_FILE_ACCESS_PPI *This,
IN PEI_FILE_HANDLE Handle,
IN UINTN *BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status;
PEI_FAT_FILE *File;
UINT64 EndPosition;
PEI_FAT_VOLUME *Volume;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
File = Handle;
Volume = File->Volume;
if (!File->Valid) {
return EFI_INVALID_PARAMETER;
}
if ((File->Attributes & FAT_ATTR_READ_ONLY) == FAT_ATTR_READ_ONLY) {
return EFI_WRITE_PROTECTED;
}
EndPosition = File->CurrentPos + *BufferSize;
//
// if position goes beyond the end of file, We expand the file size
//
if (EndPosition > File->FileSize) {
Status = FatGrowEof (PrivateData, Volume, File, EndPosition);
if (EFI_ERROR (Status)) {
return Status;
}
FatUpdateDirEntClusterSizeInfo (File);
}
//
// Write Buffer into file
//
Status = FatWriteFile (PrivateData, File, BufferSize, Buffer);
if (EFI_ERROR(Status)) {
return Status;
}
//
// Update access time, file size, fat info
//
Status = FatFileFlush (PrivateData, File);
return Status;
}
/**
Close a file
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] Handle The File handle with PEI_FILE_HANDLE type
@retval EFI_SUCCESS The file is successfuly closed
@retval EFI_INVALID_PARAMETER The give file handle is invalid
**/
EFI_STATUS
CloseFile (
IN PEI_FILE_ACCESS_PPI *This,
IN PEI_FILE_HANDLE Handle
)
{
PEI_FAT_FILE *File;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
File = Handle;
if (!File->Valid) {
return EFI_INVALID_PARAMETER;
}
File->Valid = FALSE;
return EFI_SUCCESS;
}
/**
Change file position
@param[in] Handle The File handle with PEI_FILE_HANDLE type
@param[in] Position The file's position of the file.
@retval EFI_SUCCESS Set the info successfully.
**/
EFI_STATUS
EFIAPI
SetPosition (
IN PEI_FILE_HANDLE Handle,
IN UINT64 Position
)
{
PEI_FAT_FILE *File;
File = Handle;
//
// If this is a directory, we can only set back to position 0
//
if ((File->Attributes & FAT_ATTR_DIRECTORY) == FAT_ATTR_DIRECTORY) {
File->CurrentPos = 0;
}
//
// Set the end of position
//
if (Position == (UINT64)-1) {
Position = (UINT32) File->FileSize;
}
//
// Set the position
//
File->CurrentPos = (UINT32)Position;
return EFI_SUCCESS;
}
/**
Get the file's position of the file.
@param[in] Handle The File handle with PEI_FILE_HANDLE type
@param[in] Position The file's position of the file.
@retval EFI_SUCCESS Get the info successfully.
@retval EFI_UNSUPPORTED The open file is not a file.
**/
EFI_STATUS
EFIAPI
GetPosition (
IN PEI_FILE_HANDLE Handle,
OUT UINT64 *Position
)
{
PEI_FAT_FILE *File;
File = Handle;
if ((File->Attributes & FAT_ATTR_DIRECTORY) == FAT_ATTR_DIRECTORY) {
return EFI_UNSUPPORTED;
}
*Position = (UINT64) File->CurrentPos;
return EFI_SUCCESS;
}
/**
Get the Block device info from PrivateData.
CRISIS RECOVERY must use this function.
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] Handle The File handle
@param[out] LogicalBlock Is this block a logical device?
@param[out] BlockDevNo Block index in PrivateData
@param[out] ParentDevNo ParentDev index in PrivateData
@param[out] BlockDeviceCount How many Block devices found.
@retval none
**/
VOID
EFIAPI
GetRecoveryBlockInfo (
IN PEI_FILE_ACCESS_PPI *This,
IN PEI_FILE_HANDLE Handle,
OUT BOOLEAN *LogicalBlock,
OUT UINTN *BlockDevNo,
OUT UINTN *ParentDevNo,
OUT UINTN *BlockDeviceCount
)
{
PEI_FAT_FILE *File;
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
File = Handle;
*BlockDevNo = File->Volume->BlockDeviceNo;
*BlockDeviceCount = PrivateData->BlockDeviceCount;
*LogicalBlock = PrivateData->BlockDevice[File->Volume->BlockDeviceNo].Logical;
*ParentDevNo = PrivateData->BlockDevice[File->Volume->BlockDeviceNo].ParentDevNo;
}
/**
Get the parent block device Logical from PrivateData.
CRISIS RECOVERY must use this function.
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] BlockDevNo Block index in PrivateData
@param[out] LogicalBlock Is this block a logical device?
@retval none
**/
VOID
EFIAPI
GetRecoveryLogical (
IN PEI_FILE_ACCESS_PPI *This,
IN UINTN *BlockDevNo,
OUT BOOLEAN *LogicalBlock
)
{
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
*LogicalBlock = PrivateData->BlockDevice[*BlockDevNo].Logical;
}
/**
Get the Block device type from PrivateData.
CRISIS RECOVERY must use this function.
@param[in] This Pointer to the PEI_FILE_ACCESS_PPI
@param[in] BlockDevNo Block index in PrivateData
@param[out] LogicalBlock Is this block a logical device?
@param[out] BlockDevType Device Type
@retval none
**/
VOID
EFIAPI
GetRecoveryBlockType(
IN PEI_FILE_ACCESS_PPI *This,
IN UINTN BlockDevNo,
OUT VOID *BlockDevType
)
{
PEI_FAT_PRIVATE_DATA *PrivateData;
PrivateData = PEI_FAT_PRIVATE_DATA_FROM_THIS (This);
CopyMem (BlockDevType, &PrivateData->BlockDevice[BlockDevNo].DevType , sizeof (EFI_PEI_BLOCK_DEVICE_TYPE));
}
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