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|
/** @file
UDF/ECMA-167 file system driver.
Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Udf.h"
//
// UDF filesystem driver's Global Variables.
//
EFI_DRIVER_BINDING_PROTOCOL gUdfDriverBinding = {
UdfDriverBindingSupported,
UdfDriverBindingStart,
UdfDriverBindingStop,
0x10,
NULL,
NULL
};
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gUdfSimpleFsTemplate = {
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
UdfOpenVolume
};
/**
Test to see if this driver supports ControllerHandle. Any ControllerHandle
than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be
supported.
@param[in] This Protocol instance pointer.
@param[in] ControllerHandle Handle of device to test.
@param[in] RemainingDevicePath Optional parameter use to pick a specific
child device to start.
@retval EFI_SUCCESS This driver supports this device.
@retval EFI_ALREADY_STARTED This driver is already running on this device.
@retval other This driver does not support this device.
**/
EFI_STATUS
EFIAPI
UdfDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
EFI_DISK_IO_PROTOCOL *DiskIo;
//
// Open DiskIo protocol on ControllerHandle
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
(VOID **)&DiskIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close DiskIo protocol on ControllerHandle
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
//
// Test whether ControllerHandle supports BlockIo protocol
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
NULL,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
return Status;
}
/**
Start this driver on ControllerHandle by opening a Block IO or a Block IO2
or both, and Disk IO protocol, reading Device Path, and creating a child
handle with a Disk IO and device path protocol.
@param[in] This Protocol instance pointer.
@param[in] ControllerHandle Handle of device to bind driver to
@param[in] RemainingDevicePath Optional parameter use to pick a specific
child device to start.
@retval EFI_SUCCESS This driver is added to ControllerHandle.
@retval EFI_ALREADY_STARTED This driver is already running on
ControllerHandle.
@retval other This driver does not support this device.
**/
EFI_STATUS
EFIAPI
UdfDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_TPL OldTpl;
EFI_STATUS Status;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
EFI_DISK_IO_PROTOCOL *DiskIo;
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Open BlockIo protocol on ControllerHandle
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
(VOID **)&BlockIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
ASSERT_EFI_ERROR (Status);
//
// Open DiskIo protocol on ControllerHandle
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
(VOID **)&DiskIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
ASSERT_EFI_ERROR (Status);
//
// Check if ControllerHandle supports an UDF file system
//
Status = SupportUdfFileSystem (This, ControllerHandle);
if (EFI_ERROR (Status)) {
goto Exit;
}
//
// Initialize private file system structure
//
PrivFsData =
(PRIVATE_UDF_SIMPLE_FS_DATA *)
AllocateZeroPool (sizeof (PRIVATE_UDF_SIMPLE_FS_DATA));
if (PrivFsData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Exit;
}
//
// Create new child handle
//
PrivFsData->Signature = PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE;
PrivFsData->BlockIo = BlockIo;
PrivFsData->DiskIo = DiskIo;
PrivFsData->Handle = ControllerHandle;
//
// Set up SimpleFs protocol
//
CopyMem (
(VOID *)&PrivFsData->SimpleFs,
(VOID *)&gUdfSimpleFsTemplate,
sizeof (EFI_SIMPLE_FILE_SYSTEM_PROTOCOL)
);
//
// Install child handle
//
Status = gBS->InstallMultipleProtocolInterfaces (
&PrivFsData->Handle,
&gEfiSimpleFileSystemProtocolGuid,
&PrivFsData->SimpleFs,
NULL
);
Exit:
if (EFI_ERROR (Status)) {
//
// Close DiskIo protocol on ControllerHandle
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
//
// Close BlockIo protocol on ControllerHandle
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
}
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Stop this driver on ControllerHandle. Support stopping any child handles
created by this driver.
@param This Protocol instance pointer.
@param ControllerHandle Handle of device to stop driver on
@param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
children is zero stop the entire bus driver.
@param ChildHandleBuffer List of Child Handles to Stop.
@retval EFI_SUCCESS This driver is removed ControllerHandle
@retval other This driver was not removed from this device
**/
EFI_STATUS
EFIAPI
UdfDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
EFI_STATUS Status;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFs;
//
// Open SimpleFs protocol on ControllerHandle
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid,
(VOID **)&SimpleFs,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (SimpleFs);
//
// Uninstall child handle
//
Status = gBS->UninstallMultipleProtocolInterfaces (
PrivFsData->Handle,
&gEfiSimpleFileSystemProtocolGuid,
&PrivFsData->SimpleFs,
NULL
);
FreePool ((VOID *)PrivFsData);
}
if (!EFI_ERROR (Status)) {
//
// Close DiskIo protocol on ControllerHandle
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
//
// Close BlockIo protocol on ControllerHandle
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
}
return Status;
}
/**
The user Entry Point for UDF file system driver. The user code starts with
this function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeUdf (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gUdfDriverBinding,
ImageHandle,
&gUdfComponentName,
&gUdfComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}
|
