mirror of https://github.com/acidanthera/audk.git
532 lines
15 KiB
C
532 lines
15 KiB
C
/** @file
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Fat File System driver routines that support EFI driver model.
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Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Fat.h"
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/**
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Register Driver Binding protocol for this driver.
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@param ImageHandle - Handle for the image of this driver.
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@param SystemTable - Pointer to the EFI System Table.
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@retval EFI_SUCCESS - Driver loaded.
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@return other - Driver not loaded.
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**/
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EFI_STATUS
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EFIAPI
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FatEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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);
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/**
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Unload function for this image. Uninstall DriverBinding protocol.
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@param ImageHandle - Handle for the image of this driver.
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@retval EFI_SUCCESS - Driver unloaded successfully.
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@return other - Driver can not unloaded.
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**/
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EFI_STATUS
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EFIAPI
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FatUnload (
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IN EFI_HANDLE ImageHandle
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);
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/**
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Test to see if this driver can add a file system to ControllerHandle.
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ControllerHandle must support both Disk IO and Block IO protocols.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to test.
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@param RemainingDevicePath - Not used.
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@retval EFI_SUCCESS - This driver supports this device.
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@retval EFI_ALREADY_STARTED - This driver is already running on this device.
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@return other - This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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);
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/**
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Start this driver on ControllerHandle by opening a Block IO and Disk IO
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protocol, reading Device Path. Add a Simple File System protocol to
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ControllerHandle if the media contains a valid file system.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to bind driver to.
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@param RemainingDevicePath - Not used.
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@retval EFI_SUCCESS - This driver is added to DeviceHandle.
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@retval EFI_ALREADY_STARTED - This driver is already running on DeviceHandle.
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@retval EFI_OUT_OF_RESOURCES - Can not allocate the memory.
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@return other - This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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);
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/**
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Stop this driver on ControllerHandle.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to stop driver on.
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@param NumberOfChildren - Not used.
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@param ChildHandleBuffer - Not used.
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@retval EFI_SUCCESS - This driver is removed DeviceHandle.
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@return other - This driver was not removed from this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Controller,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer
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);
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//
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// DriverBinding protocol instance
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//
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EFI_DRIVER_BINDING_PROTOCOL gFatDriverBinding = {
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FatDriverBindingSupported,
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FatDriverBindingStart,
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FatDriverBindingStop,
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0xa,
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NULL,
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NULL
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};
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/**
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Register Driver Binding protocol for this driver.
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@param ImageHandle - Handle for the image of this driver.
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@param SystemTable - Pointer to the EFI System Table.
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@retval EFI_SUCCESS - Driver loaded.
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@return other - Driver not loaded.
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**/
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EFI_STATUS
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EFIAPI
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FatEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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//
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// Initialize the EFI Driver Library
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//
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Status = EfiLibInstallDriverBindingComponentName2 (
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ImageHandle,
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SystemTable,
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&gFatDriverBinding,
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ImageHandle,
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&gFatComponentName,
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&gFatComponentName2
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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/**
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Unload function for this image. Uninstall DriverBinding protocol.
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@param ImageHandle - Handle for the image of this driver.
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@retval EFI_SUCCESS - Driver unloaded successfully.
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@return other - Driver can not unloaded.
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**/
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EFI_STATUS
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EFIAPI
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FatUnload (
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IN EFI_HANDLE ImageHandle
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE *DeviceHandleBuffer;
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UINTN DeviceHandleCount;
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UINTN Index;
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VOID *ComponentName;
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VOID *ComponentName2;
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Status = gBS->LocateHandleBuffer (
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AllHandles,
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NULL,
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NULL,
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&DeviceHandleCount,
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&DeviceHandleBuffer
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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for (Index = 0; Index < DeviceHandleCount; Index++) {
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Status = EfiTestManagedDevice (DeviceHandleBuffer[Index], ImageHandle, &gEfiDiskIoProtocolGuid);
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if (!EFI_ERROR (Status)) {
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Status = gBS->DisconnectController (
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DeviceHandleBuffer[Index],
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ImageHandle,
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NULL
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);
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if (EFI_ERROR (Status)) {
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break;
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}
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}
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}
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if (Index == DeviceHandleCount) {
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//
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// Driver is stopped successfully.
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//
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Status = gBS->HandleProtocol (ImageHandle, &gEfiComponentNameProtocolGuid, &ComponentName);
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if (EFI_ERROR (Status)) {
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ComponentName = NULL;
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}
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Status = gBS->HandleProtocol (ImageHandle, &gEfiComponentName2ProtocolGuid, &ComponentName2);
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if (EFI_ERROR (Status)) {
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ComponentName2 = NULL;
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}
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if (ComponentName == NULL) {
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if (ComponentName2 == NULL) {
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid, &gFatDriverBinding,
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NULL
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);
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} else {
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid, &gFatDriverBinding,
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&gEfiComponentName2ProtocolGuid, ComponentName2,
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NULL
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);
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}
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} else {
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if (ComponentName2 == NULL) {
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid, &gFatDriverBinding,
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&gEfiComponentNameProtocolGuid, ComponentName,
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NULL
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);
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} else {
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Status = gBS->UninstallMultipleProtocolInterfaces (
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ImageHandle,
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&gEfiDriverBindingProtocolGuid, &gFatDriverBinding,
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&gEfiComponentNameProtocolGuid, ComponentName,
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&gEfiComponentName2ProtocolGuid, ComponentName2,
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NULL
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);
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}
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}
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}
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if (DeviceHandleBuffer != NULL) {
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FreePool (DeviceHandleBuffer);
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}
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return Status;
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}
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/**
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Test to see if this driver can add a file system to ControllerHandle.
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ControllerHandle must support both Disk IO and Block IO protocols.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to test.
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@param RemainingDevicePath - Not used.
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@retval EFI_SUCCESS - This driver supports this device.
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@retval EFI_ALREADY_STARTED - This driver is already running on this device.
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@return other - This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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)
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{
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EFI_STATUS Status;
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EFI_DISK_IO_PROTOCOL *DiskIo;
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//
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// Open the IO Abstraction(s) needed to perform the supported test
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiDiskIoProtocolGuid,
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(VOID **) &DiskIo,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Close the I/O Abstraction(s) used to perform the supported test
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//
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gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDiskIoProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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//
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// Open the IO Abstraction(s) needed to perform the supported test
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiBlockIoProtocolGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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return Status;
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}
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/**
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Start this driver on ControllerHandle by opening a Block IO and Disk IO
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protocol, reading Device Path. Add a Simple File System protocol to
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ControllerHandle if the media contains a valid file system.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to bind driver to.
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@param RemainingDevicePath - Not used.
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@retval EFI_SUCCESS - This driver is added to DeviceHandle.
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@retval EFI_ALREADY_STARTED - This driver is already running on DeviceHandle.
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@retval EFI_OUT_OF_RESOURCES - Can not allocate the memory.
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@return other - This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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)
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{
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EFI_STATUS Status;
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EFI_BLOCK_IO_PROTOCOL *BlockIo;
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EFI_DISK_IO_PROTOCOL *DiskIo;
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EFI_DISK_IO2_PROTOCOL *DiskIo2;
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BOOLEAN LockedByMe;
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LockedByMe = FALSE;
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//
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// Acquire the lock.
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// If caller has already acquired the lock, cannot lock it again.
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//
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Status = FatAcquireLockOrFail ();
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if (!EFI_ERROR (Status)) {
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LockedByMe = TRUE;
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}
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Status = InitializeUnicodeCollationSupport (This->DriverBindingHandle);
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if (EFI_ERROR (Status)) {
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goto Exit;
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}
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//
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// Open our required BlockIo and DiskIo
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiBlockIoProtocolGuid,
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(VOID **) &BlockIo,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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goto Exit;
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}
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiDiskIoProtocolGuid,
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(VOID **) &DiskIo,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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goto Exit;
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}
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiDiskIo2ProtocolGuid,
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(VOID **) &DiskIo2,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_BY_DRIVER
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);
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if (EFI_ERROR (Status)) {
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DiskIo2 = NULL;
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}
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//
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// Allocate Volume structure. In FatAllocateVolume(), Resources
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// are allocated with protocol installed and cached initialized
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//
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Status = FatAllocateVolume (ControllerHandle, DiskIo, DiskIo2, BlockIo);
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//
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// When the media changes on a device it will Reinstall the BlockIo interaface.
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// This will cause a call to our Stop(), and a subsequent reentrant call to our
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// Start() successfully. We should leave the device open when this happen.
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//
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if (EFI_ERROR (Status)) {
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiSimpleFileSystemProtocolGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDiskIoProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDiskIo2ProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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}
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}
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Exit:
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//
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// Unlock if locked by myself.
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//
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if (LockedByMe) {
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FatReleaseLock ();
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}
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return Status;
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}
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/**
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Stop this driver on ControllerHandle.
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@param This - Protocol instance pointer.
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@param ControllerHandle - Handle of device to stop driver on.
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@param NumberOfChildren - Not used.
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@param ChildHandleBuffer - Not used.
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@retval EFI_SUCCESS - This driver is removed DeviceHandle.
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@return other - This driver was not removed from this device.
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**/
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EFI_STATUS
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EFIAPI
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FatDriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer
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)
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{
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EFI_STATUS Status;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FileSystem;
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FAT_VOLUME *Volume;
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EFI_DISK_IO2_PROTOCOL *DiskIo2;
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DiskIo2 = NULL;
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//
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// Get our context back
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiSimpleFileSystemProtocolGuid,
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(VOID **) &FileSystem,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (!EFI_ERROR (Status)) {
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Volume = VOLUME_FROM_VOL_INTERFACE (FileSystem);
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DiskIo2 = Volume->DiskIo2;
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Status = FatAbandonVolume (Volume);
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}
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if (!EFI_ERROR (Status)) {
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if (DiskIo2 != NULL) {
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Status = gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDiskIo2ProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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ASSERT_EFI_ERROR (Status);
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}
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Status = gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDiskIoProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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ASSERT_EFI_ERROR (Status);
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}
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return Status;
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}
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