diff options
Diffstat (limited to 'FatPkg/EnhancedFatDxe/Fat.c')
| -rw-r--r-- | FatPkg/EnhancedFatDxe/Fat.c | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/FatPkg/EnhancedFatDxe/Fat.c b/FatPkg/EnhancedFatDxe/Fat.c new file mode 100644 index 0000000000..e52b8c1d56 --- /dev/null +++ b/FatPkg/EnhancedFatDxe/Fat.c @@ -0,0 +1,393 @@ +/*++
+
+Copyright (c) 2005 - 2007, Intel Corporation
+All rights reserved. This program and the accompanying materials are licensed and made available
+under the terms and conditions of the BSD License which accompanies this
+distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+
+Module Name:
+
+ Fat.c
+
+Abstract:
+
+ Fat File System driver routines that support EFI driver model
+
+--*/
+
+#include "Fat.h"
+
+EFI_STATUS
+EFIAPI
+FatEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ );
+
+EFI_STATUS
+EFIAPI
+FatUnload (
+ IN EFI_HANDLE ImageHandle
+ );
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE Controller,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ );
+
+//
+// DriverBinding protocol instance
+//
+EFI_DRIVER_BINDING_PROTOCOL gFatDriverBinding = {
+ FatDriverBindingSupported,
+ FatDriverBindingStart,
+ FatDriverBindingStop,
+ 0xa,
+ NULL,
+ NULL
+};
+
+EFI_STATUS
+EFIAPI
+FatEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+/*++
+
+Routine Description:
+
+ Register Driver Binding protocol for this driver.
+
+Arguments:
+
+ ImageHandle - Handle for the image of this driver.
+ SystemTable - Pointer to the EFI System Table.
+
+Returns:
+
+ EFI_SUCCESS - Driver loaded.
+ other - Driver not loaded.
+
+--*/
+{
+ EFI_STATUS Status;
+
+ //
+ // Initialize the EFI Driver Library
+ //
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gFatDriverBinding,
+ ImageHandle,
+ &gFatComponentName,
+ &gFatComponentName2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+FatUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+/*++
+
+Routine Description:
+
+ Unload function for this image. Uninstall DriverBinding protocol.
+
+Arguments:
+
+ ImageHandle - Handle for the image of this driver.
+
+Returns:
+
+ EFI_SUCCESS - Driver unloaded successfully.
+ other - Driver can not unloaded.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *DeviceHandleBuffer;
+ UINTN DeviceHandleCount;
+ UINTN Index;
+
+ Status = gBS->LocateHandleBuffer (
+ AllHandles,
+ NULL,
+ NULL,
+ &DeviceHandleCount,
+ &DeviceHandleBuffer
+ );
+ if (!EFI_ERROR (Status)) {
+ for (Index = 0; Index < DeviceHandleCount; Index++) {
+ Status = gBS->DisconnectController (
+ DeviceHandleBuffer[Index],
+ ImageHandle,
+ NULL
+ );
+ }
+
+ if (DeviceHandleBuffer != NULL) {
+ FreePool (DeviceHandleBuffer);
+ }
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+/*++
+
+Routine Description:
+
+ Test to see if this driver can add a file system to ControllerHandle.
+ ControllerHandle must support both Disk IO and Block IO protocols.
+
+Arguments:
+
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to test.
+ RemainingDevicePath - Not used.
+
+Returns:
+
+ EFI_SUCCESS - This driver supports this device.
+ EFI_ALREADY_STARTED - This driver is already running on this device.
+ other - This driver does not support this device.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+
+ //
+ // Open the IO Abstraction(s) needed to perform the supported test
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ (VOID **) &DiskIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Close the I/O Abstraction(s) used to perform the supported test
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+
+ //
+ // Open the IO Abstraction(s) needed to perform the supported test
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+/*++
+
+Routine Description:
+
+ Start this driver on ControllerHandle by opening a Block IO and Disk IO
+ protocol, reading Device Path. Add a Simple File System protocol to
+ ControllerHandle if the media contains a valid file system.
+
+Arguments:
+
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to bind driver to.
+ RemainingDevicePath - Not used.
+
+Returns:
+
+ EFI_SUCCESS - This driver is added to DeviceHandle.
+ EFI_ALREADY_STARTED - This driver is already running on DeviceHandle.
+ EFI_OUT_OF_RESOURCES - Can not allocate the memory.
+ other - This driver does not support this device.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+
+ Status = InitializeUnicodeCollationSupport (This->DriverBindingHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Open our required BlockIo and DiskIo
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ (VOID **) &BlockIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ (VOID **) &DiskIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Allocate Volume structure. In FatAllocateVolume(), Resources
+ // are allocated with protocol installed and cached initialized
+ //
+ Status = FatAllocateVolume (ControllerHandle, DiskIo, BlockIo);
+
+ //
+ // When the media changes on a device it will Reinstall the BlockIo interaface.
+ // This will cause a call to our Stop(), and a subsequent reentrant call to our
+ // Start() successfully. We should leave the device open when this happen.
+ //
+ if (EFI_ERROR (Status)) {
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+FatDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ )
+/*++
+
+Routine Description:
+ Stop this driver on ControllerHandle.
+
+Arguments:
+ This - Protocol instance pointer.
+ ControllerHandle - Handle of device to stop driver on.
+ NumberOfChildren - Not used.
+ ChildHandleBuffer - Not used.
+
+Returns:
+ EFI_SUCCESS - This driver is removed DeviceHandle.
+ other - This driver was not removed from this device.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FileSystem;
+ FAT_VOLUME *Volume;
+
+ //
+ // Get our context back
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ (VOID **) &FileSystem,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+
+ if (!EFI_ERROR (Status)) {
+ Volume = VOLUME_FROM_VOL_INTERFACE (FileSystem);
+ Status = FatAbandonVolume (Volume);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ Status = gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+
+ return Status;
+}
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