9be2900668
The others changes include: a. Check RemainingDevicePath at beginning of Supported(), make sure it has been verified before Start() is called. b. Check IO protocol firstly rather than EfiDevicePathProtocolGuid, reduce the times entering into Start() function because EfiDevicePathProtocolGuid existed on most of handle. 2. roll back serial drivers not to create child device, if the device speicifed by remainingdevicepath cannot find in the created devices list. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9267 6f19259b-4bc3-4df7-8a09-765794883524
748 lines
23 KiB
C
748 lines
23 KiB
C
/** @file
|
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Partition driver that produces logical BlockIo devices from a physical
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BlockIo device. The logical BlockIo devices are based on the format
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of the raw block devices media. Currently "El Torito CD-ROM", Legacy
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MBR, and GPT partition schemes are supported.
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Copyright (c) 2006 - 2009, Intel Corporation. <BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this 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 "Partition.h"
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//
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// Partition Driver Global Variables.
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//
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EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding = {
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PartitionDriverBindingSupported,
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PartitionDriverBindingStart,
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PartitionDriverBindingStop,
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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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// Prioritized function list to detect partition table.
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//
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PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {
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PartitionInstallGptChildHandles,
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PartitionInstallElToritoChildHandles,
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PartitionInstallMbrChildHandles,
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NULL
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};
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/**
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Test to see if this driver supports ControllerHandle. Any ControllerHandle
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than contains a BlockIo and DiskIo protocol can be supported.
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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 Optional parameter use to pick a specific child
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device to start.
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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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@retval 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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PartitionDriverBindingSupported (
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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_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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EFI_DISK_IO_PROTOCOL *DiskIo;
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EFI_DEV_PATH *Node;
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//
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// Check RemainingDevicePath validation
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//
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if (RemainingDevicePath != NULL) {
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//
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// Check if RemainingDevicePath is the End of Device Path Node,
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// if yes, go on checking other conditions
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//
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if (!IsDevicePathEnd (RemainingDevicePath)) {
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//
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// If RemainingDevicePath isn't the End of Device Path Node,
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// check its validation
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//
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Node = (EFI_DEV_PATH *) RemainingDevicePath;
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if (Node->DevPath.Type != MEDIA_DEVICE_PATH ||
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Node->DevPath.SubType != MEDIA_HARDDRIVE_DP ||
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DevicePathNodeLength (&Node->DevPath) != sizeof (HARDDRIVE_DEVICE_PATH)) {
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return EFI_UNSUPPORTED;
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}
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}
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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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&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 (Status == EFI_ALREADY_STARTED) {
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return EFI_SUCCESS;
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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 EFI Device Path protocol 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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&gEfiDevicePathProtocolGuid,
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(VOID **) &ParentDevicePath,
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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 (Status == EFI_ALREADY_STARTED) {
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return EFI_SUCCESS;
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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 protocol, don't use device path protocol in the Support() function
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//
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gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDevicePathProtocolGuid,
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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, and creating a child handle with a
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Disk IO and device path protocol.
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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 Optional parameter use to pick a specific child
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device to start.
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@retval EFI_SUCCESS This driver is added to ControllerHandle
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@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
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@retval 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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PartitionDriverBindingStart (
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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_STATUS OpenStatus;
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EFI_BLOCK_IO_PROTOCOL *BlockIo;
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EFI_DISK_IO_PROTOCOL *DiskIo;
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EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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PARTITION_DETECT_ROUTINE *Routine;
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BOOLEAN MediaPresent;
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//
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// Check RemainingDevicePath validation
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//
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if (RemainingDevicePath != NULL) {
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//
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// Check if RemainingDevicePath is the End of Device Path Node,
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// if yes, return EFI_SUCCESS
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//
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if (IsDevicePathEnd (RemainingDevicePath)) {
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return EFI_SUCCESS;
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}
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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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return Status;
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}
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//
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// Get the Device Path Protocol on ControllerHandle's handle
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiDevicePathProtocolGuid,
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(VOID **) &ParentDevicePath,
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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) && Status != EFI_ALREADY_STARTED) {
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return Status;
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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) && Status != EFI_ALREADY_STARTED) {
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gBS->CloseProtocol (
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ControllerHandle,
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&gEfiDevicePathProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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return Status;
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}
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OpenStatus = Status;
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//
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// Try to read blocks when there's media or it is removable physical partition.
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//
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Status = EFI_UNSUPPORTED;
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MediaPresent = BlockIo->Media->MediaPresent;
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if (BlockIo->Media->MediaPresent ||
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(BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {
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//
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// Try for GPT, then El Torito, and then legacy MBR partition types. If the
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// media supports a given partition type install child handles to represent
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// the partitions described by the media.
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//
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Routine = &mPartitionDetectRoutineTable[0];
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while (*Routine != NULL) {
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Status = (*Routine) (
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This,
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ControllerHandle,
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DiskIo,
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BlockIo,
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ParentDevicePath
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);
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if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED || Status == EFI_NO_MEDIA) {
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break;
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}
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Routine++;
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}
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}
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//
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// In the case that the driver is already started (OpenStatus == EFI_ALREADY_STARTED),
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// the DevicePathProtocol and the DiskIoProtocol are not actually opened by the
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// driver. So don't try to close them. Otherwise, we will break the dependency
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// between the controller and the driver set up before.
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//
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// In the case that when the media changes on a device it will Reinstall the
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// BlockIo interaface. This will cause a call to our Stop(), and a subsequent
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// reentrant call to our Start() successfully. We should leave the device open
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// when this happen. The "media change" case includes either the status is
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// EFI_MEDIA_CHANGED or it is a "media" to "no media" change.
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//
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if (EFI_ERROR (Status) &&
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!EFI_ERROR (OpenStatus) &&
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Status != EFI_MEDIA_CHANGED &&
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!(MediaPresent && Status == EFI_NO_MEDIA)) {
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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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&gEfiDevicePathProtocolGuid,
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This->DriverBindingHandle,
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ControllerHandle
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);
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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. Support stopping any child handles
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created by this driver.
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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 Number of Handles in ChildHandleBuffer. If number of
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children is zero stop the entire bus driver.
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@param ChildHandleBuffer List of Child Handles to Stop.
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@retval EFI_SUCCESS This driver is removed ControllerHandle
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@retval 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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PartitionDriverBindingStop (
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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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UINTN Index;
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EFI_BLOCK_IO_PROTOCOL *BlockIo;
|
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BOOLEAN AllChildrenStopped;
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PARTITION_PRIVATE_DATA *Private;
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EFI_DISK_IO_PROTOCOL *DiskIo;
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|
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if (NumberOfChildren == 0) {
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//
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// Close the bus driver
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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,
|
|
ControllerHandle
|
|
);
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|
|
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gBS->CloseProtocol (
|
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ControllerHandle,
|
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&gEfiDevicePathProtocolGuid,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle
|
|
);
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|
|
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return EFI_SUCCESS;
|
|
}
|
|
|
|
AllChildrenStopped = TRUE;
|
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for (Index = 0; Index < NumberOfChildren; Index++) {
|
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Status = gBS->OpenProtocol (
|
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ChildHandleBuffer[Index],
|
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&gEfiBlockIoProtocolGuid,
|
|
(VOID **) &BlockIo,
|
|
This->DriverBindingHandle,
|
|
ControllerHandle,
|
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
|
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Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);
|
|
|
|
//
|
|
// All Software protocols have be freed from the handle so remove it.
|
|
//
|
|
BlockIo->FlushBlocks (BlockIo);
|
|
|
|
Status = gBS->CloseProtocol (
|
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ControllerHandle,
|
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&gEfiDiskIoProtocolGuid,
|
|
This->DriverBindingHandle,
|
|
ChildHandleBuffer[Index]
|
|
);
|
|
|
|
Status = gBS->UninstallMultipleProtocolInterfaces (
|
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ChildHandleBuffer[Index],
|
|
&gEfiDevicePathProtocolGuid,
|
|
Private->DevicePath,
|
|
&gEfiBlockIoProtocolGuid,
|
|
&Private->BlockIo,
|
|
Private->EspGuid,
|
|
NULL,
|
|
NULL
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->OpenProtocol (
|
|
ControllerHandle,
|
|
&gEfiDiskIoProtocolGuid,
|
|
(VOID **) &DiskIo,
|
|
This->DriverBindingHandle,
|
|
ChildHandleBuffer[Index],
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
|
);
|
|
} else {
|
|
FreePool (Private->DevicePath);
|
|
FreePool (Private);
|
|
}
|
|
|
|
}
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
AllChildrenStopped = FALSE;
|
|
}
|
|
}
|
|
|
|
if (!AllChildrenStopped) {
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
Reset the Block Device.
|
|
|
|
@param This Protocol instance pointer.
|
|
@param ExtendedVerification Driver may perform diagnostics on reset.
|
|
|
|
@retval EFI_SUCCESS The device was reset.
|
|
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
|
|
not be reset.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PartitionReset (
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN BOOLEAN ExtendedVerification
|
|
)
|
|
{
|
|
PARTITION_PRIVATE_DATA *Private;
|
|
|
|
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);
|
|
|
|
return Private->ParentBlockIo->Reset (
|
|
Private->ParentBlockIo,
|
|
ExtendedVerification
|
|
);
|
|
}
|
|
|
|
|
|
/**
|
|
Read by using the Disk IO protocol on the parent device. Lba addresses
|
|
must be converted to byte offsets.
|
|
|
|
@param This Protocol instance pointer.
|
|
@param MediaId Id of the media, changes every time the media is replaced.
|
|
@param Lba The starting Logical Block Address to read from
|
|
@param BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param Buffer Buffer containing read data
|
|
|
|
@retval EFI_SUCCESS The data was read correctly from the device.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing the read.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
|
|
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The read request contains device addresses that are not
|
|
valid for the device.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PartitionReadBlocks (
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA Lba,
|
|
IN UINTN BufferSize,
|
|
OUT VOID *Buffer
|
|
)
|
|
{
|
|
PARTITION_PRIVATE_DATA *Private;
|
|
UINT64 Offset;
|
|
|
|
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);
|
|
|
|
if (BufferSize % Private->BlockSize != 0) {
|
|
return EFI_BAD_BUFFER_SIZE;
|
|
}
|
|
|
|
Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;
|
|
if (Offset + BufferSize > Private->End) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// Because some kinds of partition have different block size from their parent
|
|
// device, we call the Disk IO protocol on the parent device, not the Block IO
|
|
// protocol
|
|
//
|
|
return Private->DiskIo->ReadDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);
|
|
}
|
|
|
|
/**
|
|
Write by using the Disk IO protocol on the parent device. Lba addresses
|
|
must be converted to byte offsets.
|
|
|
|
@param This Protocol instance pointer.
|
|
@param MediaId Id of the media, changes every time the media is replaced.
|
|
@param Lba The starting Logical Block Address to read from
|
|
@param BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param Buffer Buffer containing read data
|
|
|
|
@retval EFI_SUCCESS The data was written correctly to the device.
|
|
@retval EFI_WRITE_PROTECTED The device can not be written to.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
|
|
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The write request contains a LBA that is not
|
|
valid for the device.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PartitionWriteBlocks (
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA Lba,
|
|
IN UINTN BufferSize,
|
|
OUT VOID *Buffer
|
|
)
|
|
{
|
|
PARTITION_PRIVATE_DATA *Private;
|
|
UINT64 Offset;
|
|
|
|
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);
|
|
|
|
if (BufferSize % Private->BlockSize != 0) {
|
|
return EFI_BAD_BUFFER_SIZE;
|
|
}
|
|
|
|
Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;
|
|
if (Offset + BufferSize > Private->End) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// Because some kinds of partition have different block size from their parent
|
|
// device, we call the Disk IO protocol on the parent device, not the Block IO
|
|
// protocol
|
|
//
|
|
return Private->DiskIo->WriteDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);
|
|
}
|
|
|
|
|
|
/**
|
|
Flush the parent Block Device.
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
@retval EFI_SUCCESS All outstanding data was written to the device
|
|
@retval EFI_DEVICE_ERROR The device reported an error while writting back the data
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PartitionFlushBlocks (
|
|
IN EFI_BLOCK_IO_PROTOCOL *This
|
|
)
|
|
{
|
|
PARTITION_PRIVATE_DATA *Private;
|
|
|
|
Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);
|
|
|
|
return Private->ParentBlockIo->FlushBlocks (Private->ParentBlockIo);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
Create a child handle for a logical block device that represents the
|
|
bytes Start to End of the Parent Block IO device.
|
|
|
|
@param[in] This Protocol instance pointer
|
|
@param[in] ParentHandle Parent Handle for new child
|
|
@param[in] ParentDiskIo Parent DiskIo interface
|
|
@param[in] ParentBlockIo Parent BlockIo interface
|
|
@param[in] ParentDevicePath Parent Device Path
|
|
@param[in] DevicePathNode Child Device Path node
|
|
@param[in] Start Start Block
|
|
@param[in] End End Block
|
|
@param[in] BlockSize Child block size
|
|
@param[in] InstallEspGuid Flag to install EFI System Partition GUID on handle
|
|
|
|
@retval EFI_SUCCESS A child handle was added
|
|
@retval other A child handle was not added
|
|
|
|
**/
|
|
EFI_STATUS
|
|
PartitionInstallChildHandle (
|
|
IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
|
IN EFI_HANDLE ParentHandle,
|
|
IN EFI_DISK_IO_PROTOCOL *ParentDiskIo,
|
|
IN EFI_BLOCK_IO_PROTOCOL *ParentBlockIo,
|
|
IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePathNode,
|
|
IN EFI_LBA Start,
|
|
IN EFI_LBA End,
|
|
IN UINT32 BlockSize,
|
|
IN BOOLEAN InstallEspGuid
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
PARTITION_PRIVATE_DATA *Private;
|
|
|
|
Private = AllocateZeroPool (sizeof (PARTITION_PRIVATE_DATA));
|
|
if (Private == NULL) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
Private->Signature = PARTITION_PRIVATE_DATA_SIGNATURE;
|
|
|
|
Private->Start = MultU64x32 (Start, ParentBlockIo->Media->BlockSize);
|
|
Private->End = MultU64x32 (End + 1, ParentBlockIo->Media->BlockSize);
|
|
|
|
Private->BlockSize = BlockSize;
|
|
Private->ParentBlockIo = ParentBlockIo;
|
|
Private->DiskIo = ParentDiskIo;
|
|
|
|
Private->BlockIo.Revision = ParentBlockIo->Revision;
|
|
|
|
Private->BlockIo.Media = &Private->Media;
|
|
CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));
|
|
Private->Media.LogicalPartition = TRUE;
|
|
Private->Media.LastBlock = DivU64x32 (
|
|
MultU64x32 (
|
|
End - Start + 1,
|
|
ParentBlockIo->Media->BlockSize
|
|
),
|
|
BlockSize
|
|
) - 1;
|
|
|
|
Private->Media.BlockSize = (UINT32) BlockSize;
|
|
|
|
Private->BlockIo.Reset = PartitionReset;
|
|
Private->BlockIo.ReadBlocks = PartitionReadBlocks;
|
|
Private->BlockIo.WriteBlocks = PartitionWriteBlocks;
|
|
Private->BlockIo.FlushBlocks = PartitionFlushBlocks;
|
|
|
|
Private->DevicePath = AppendDevicePathNode (ParentDevicePath, DevicePathNode);
|
|
|
|
if (Private->DevicePath == NULL) {
|
|
FreePool (Private);
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
if (InstallEspGuid) {
|
|
Private->EspGuid = &gEfiPartTypeSystemPartGuid;
|
|
} else {
|
|
//
|
|
// If NULL InstallMultipleProtocolInterfaces will ignore it.
|
|
//
|
|
Private->EspGuid = NULL;
|
|
}
|
|
//
|
|
// Create the new handle
|
|
//
|
|
Private->Handle = NULL;
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
&Private->Handle,
|
|
&gEfiDevicePathProtocolGuid,
|
|
Private->DevicePath,
|
|
&gEfiBlockIoProtocolGuid,
|
|
&Private->BlockIo,
|
|
Private->EspGuid,
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// Open the Parent Handle for the child
|
|
//
|
|
Status = gBS->OpenProtocol (
|
|
ParentHandle,
|
|
&gEfiDiskIoProtocolGuid,
|
|
(VOID **) &ParentDiskIo,
|
|
This->DriverBindingHandle,
|
|
Private->Handle,
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
|
);
|
|
} else {
|
|
FreePool (Private->DevicePath);
|
|
FreePool (Private);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
The user Entry Point for module Partition. 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
|
|
InitializePartition (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
//
|
|
// Install driver model protocol(s).
|
|
//
|
|
Status = EfiLibInstallDriverBindingComponentName2 (
|
|
ImageHandle,
|
|
SystemTable,
|
|
&gPartitionDriverBinding,
|
|
ImageHandle,
|
|
&gPartitionComponentName,
|
|
&gPartitionComponentName2
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
|
|
return Status;
|
|
}
|
|
|