#include "Partition.h"

Functions
EFI_STATUS EFIAPI	PartitionDriverBindingSupported (IN EFI_DRIVER_BINDING_PROTOCOL This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL RemainingDevicePath)

EFI_STATUS EFIAPI	PartitionDriverBindingStart (IN EFI_DRIVER_BINDING_PROTOCOL This, IN EFI_HANDLE ControllerHandle, IN EFI_DEVICE_PATH_PROTOCOL RemainingDevicePath)

EFI_STATUS EFIAPI	PartitionDriverBindingStop (IN EFI_DRIVER_BINDING_PROTOCOL This, IN EFI_HANDLE ControllerHandle, IN UINTN NumberOfChildren, IN EFI_HANDLE ChildHandleBuffer)

EFI_STATUS EFIAPI	PartitionReset (IN EFI_BLOCK_IO_PROTOCOL *This, IN BOOLEAN ExtendedVerification)

EFI_STATUS	ProbeMediaStatus (IN EFI_DISK_IO_PROTOCOL *DiskIo, IN UINT32 MediaId, IN EFI_STATUS DefaultStatus)

EFI_STATUS EFIAPI	PartitionReadBlocks (IN EFI_BLOCK_IO_PROTOCOL This, IN UINT32 MediaId, IN EFI_LBA Lba, IN UINTN BufferSize, OUT VOID Buffer)

EFI_STATUS EFIAPI	PartitionWriteBlocks (IN EFI_BLOCK_IO_PROTOCOL This, IN UINT32 MediaId, IN EFI_LBA Lba, IN UINTN BufferSize, IN VOID Buffer)

EFI_STATUS EFIAPI	PartitionFlushBlocks (IN EFI_BLOCK_IO_PROTOCOL *This)

EFI_STATUS	ProbeMediaStatusEx (IN EFI_DISK_IO2_PROTOCOL *DiskIo2, IN UINT32 MediaId, IN EFI_STATUS DefaultStatus)

EFI_STATUS EFIAPI	PartitionResetEx (IN EFI_BLOCK_IO2_PROTOCOL *This, IN BOOLEAN ExtendedVerification)

VOID EFIAPI	PartitionOnAccessComplete (IN EFI_EVENT Event, IN VOID *Context)

PARTITION_ACCESS_TASK *	PartitionCreateAccessTask (IN EFI_BLOCK_IO2_TOKEN *Token)

EFI_STATUS EFIAPI	PartitionReadBlocksEx (IN EFI_BLOCK_IO2_PROTOCOL This, IN UINT32 MediaId, IN EFI_LBA Lba, IN OUT EFI_BLOCK_IO2_TOKEN Token, IN UINTN BufferSize, OUT VOID *Buffer)

EFI_STATUS EFIAPI	PartitionWriteBlocksEx (IN EFI_BLOCK_IO2_PROTOCOL This, IN UINT32 MediaId, IN EFI_LBA Lba, IN OUT EFI_BLOCK_IO2_TOKEN Token, IN UINTN BufferSize, IN VOID *Buffer)

EFI_STATUS EFIAPI	PartitionFlushBlocksEx (IN EFI_BLOCK_IO2_PROTOCOL This, IN OUT EFI_BLOCK_IO2_TOKEN Token)

EFI_STATUS	PartitionInstallChildHandle (IN EFI_DRIVER_BINDING_PROTOCOL This, IN EFI_HANDLE ParentHandle, IN EFI_DISK_IO_PROTOCOL ParentDiskIo, IN EFI_DISK_IO2_PROTOCOL ParentDiskIo2, IN EFI_BLOCK_IO_PROTOCOL ParentBlockIo, IN EFI_BLOCK_IO2_PROTOCOL ParentBlockIo2, IN EFI_DEVICE_PATH_PROTOCOL ParentDevicePath, IN EFI_DEVICE_PATH_PROTOCOL DevicePathNode, IN EFI_PARTITION_INFO_PROTOCOL PartitionInfo, IN EFI_LBA Start, IN EFI_LBA End, IN UINT32 BlockSize, IN EFI_GUID *TypeGuid)

EFI_STATUS EFIAPI	InitializePartition (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)

BOOLEAN	HasChildren (IN EFI_HANDLE ControllerHandle)

Variables
EFI_DRIVER_BINDING_PROTOCOL	gPartitionDriverBinding

PARTITION_DETECT_ROUTINE	mPartitionDetectRoutineTable []

Detailed Description

Partition driver that produces logical BlockIo devices from a physical BlockIo device. The logical BlockIo devices are based on the format of the raw block devices media. Currently "El Torito CD-ROM", UDF, Legacy MBR, and GPT partition schemes are supported.

Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc. Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Partition.c.

Function Documentation

◆ HasChildren()

BOOLEAN HasChildren ( IN EFI_HANDLE ControllerHandle )

Test to see if there is any child on ControllerHandle.

Parameters

[in] ControllerHandle Handle of device to test.

Return values

TRUE	There are children on the ControllerHandle.
FALSE	No child is on the ControllerHandle.

Definition at line 1355 of file Partition.c.

◆ InitializePartition()

EFI_STATUS EFIAPI InitializePartition	(	IN EFI_HANDLE	ImageHandle,
		IN EFI_SYSTEM_TABLE *	SystemTable
	)

The user Entry Point for module Partition. The user code starts with this function.

Parameters

[in]	ImageHandle	The firmware allocated handle for the EFI image.
[in]	SystemTable	A pointer to the EFI System Table.

Return values

EFI_SUCCESS	The entry point is executed successfully.
other	Some error occurs when executing this entry point.

Definition at line 1322 of file Partition.c.

◆ PartitionCreateAccessTask()

PARTITION_ACCESS_TASK * PartitionCreateAccessTask ( IN EFI_BLOCK_IO2_TOKEN * Token )

Create a new PARTITION_ACCESS_TASK instance.

Parameters

Token Pointer to the EFI_BLOCK_IO2_TOKEN.

Returns: Pointer to the created PARTITION_ACCESS_TASK instance or NULL upon failure.

Definition at line 875 of file Partition.c.

◆ PartitionDriverBindingStart()

EFI_STATUS EFIAPI PartitionDriverBindingStart	(	IN EFI_DRIVER_BINDING_PROTOCOL *	This,
		IN EFI_HANDLE	ControllerHandle,
		IN EFI_DEVICE_PATH_PROTOCOL *	RemainingDevicePath
	)

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.

Parameters

[in]	This	Protocol instance pointer.
[in]	ControllerHandle	Handle of device to bind driver to
[in]	RemainingDevicePath	Optional parameter use to pick a specific child device to start.

Return values

EFI_SUCCESS	This driver is added to ControllerHandle
EFI_ALREADY_STARTED	This driver is already running on ControllerHandle
other	This driver does not support this device

Definition at line 194 of file Partition.c.

◆ PartitionDriverBindingStop()

EFI_STATUS EFIAPI PartitionDriverBindingStop	(	IN EFI_DRIVER_BINDING_PROTOCOL *	This,
		IN EFI_HANDLE	ControllerHandle,
		IN UINTN	NumberOfChildren,
		IN EFI_HANDLE *	ChildHandleBuffer
	)

Stop this driver on ControllerHandle. Support stopping any child handles created by this driver.

Parameters

This	Protocol instance pointer.
ControllerHandle	Handle of device to stop driver on
NumberOfChildren	Number of Handles in ChildHandleBuffer. If number of children is zero stop the entire bus driver.
ChildHandleBuffer	List of Child Handles to Stop.

Return values

EFI_SUCCESS	This driver is removed ControllerHandle
other	This driver was not removed from this device

Definition at line 399 of file Partition.c.

◆ PartitionDriverBindingSupported()

EFI_STATUS EFIAPI PartitionDriverBindingSupported	(	IN EFI_DRIVER_BINDING_PROTOCOL *	This,
		IN EFI_HANDLE	ControllerHandle,
		IN EFI_DEVICE_PATH_PROTOCOL *	RemainingDevicePath
	)

Test to see if this driver supports ControllerHandle. Any ControllerHandle than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be supported.

Parameters

[in]	This	Protocol instance pointer.
[in]	ControllerHandle	Handle of device to test.
[in]	RemainingDevicePath	Optional parameter use to pick a specific child device to start.

Return values

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

Definition at line 70 of file Partition.c.

◆ PartitionFlushBlocks()

EFI_STATUS EFIAPI PartitionFlushBlocks ( IN EFI_BLOCK_IO_PROTOCOL * This )

Flush the parent Block Device.

Parameters

This	Protocol instance pointer.

Return values

EFI_SUCCESS	All outstanding data was written to the device
EFI_DEVICE_ERROR	The device reported an error while writting back the data
EFI_NO_MEDIA	There is no media in the device.

Definition at line 766 of file Partition.c.

◆ PartitionFlushBlocksEx()

EFI_STATUS EFIAPI PartitionFlushBlocksEx	(	IN EFI_BLOCK_IO2_PROTOCOL *	This,
		IN OUT EFI_BLOCK_IO2_TOKEN *	Token
	)

Flush the Block Device.

If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.

Parameters

[in]	This	Indicates a pointer to the calling context.
[in,out]	Token	A pointer to the token associated with the transaction

Return values

EFI_SUCCESS	The flush request was queued if Event is not NULL. All outstanding data was written correctly to the device if the Event is NULL.
EFI_DEVICE_ERROR	The device reported an error while writting back the data.
EFI_WRITE_PROTECTED	The device cannot be written to.
EFI_NO_MEDIA	There is no media in the device.
EFI_MEDIA_CHANGED	The MediaId is not for the current media.
EFI_OUT_OF_RESOURCES	The request could not be completed due to a lack of resources.

Definition at line 1082 of file Partition.c.

◆ PartitionInstallChildHandle()

EFI_STATUS PartitionInstallChildHandle	(	IN EFI_DRIVER_BINDING_PROTOCOL *	This,
		IN EFI_HANDLE	ParentHandle,
		IN EFI_DISK_IO_PROTOCOL *	ParentDiskIo,
		IN EFI_DISK_IO2_PROTOCOL *	ParentDiskIo2,
		IN EFI_BLOCK_IO_PROTOCOL *	ParentBlockIo,
		IN EFI_BLOCK_IO2_PROTOCOL *	ParentBlockIo2,
		IN EFI_DEVICE_PATH_PROTOCOL *	ParentDevicePath,
		IN EFI_DEVICE_PATH_PROTOCOL *	DevicePathNode,
		IN EFI_PARTITION_INFO_PROTOCOL *	PartitionInfo,
		IN EFI_LBA	Start,
		IN EFI_LBA	End,
		IN UINT32	BlockSize,
		IN EFI_GUID *	TypeGuid
	)

Create a child handle for a logical block device that represents the bytes Start to End of the Parent Block IO device.

Parameters

[in]	This	Protocol instance pointer.
[in]	ParentHandle	Parent Handle for new child.
[in]	ParentDiskIo	Parent DiskIo interface.
[in]	ParentDiskIo2	Parent DiskIo2 interface.
[in]	ParentBlockIo	Parent BlockIo interface.
[in]	ParentBlockIo2	Parent BlockIo2 interface.
[in]	ParentDevicePath	Parent Device Path.
[in]	DevicePathNode	Child Device Path node.
[in]	PartitionInfo	Child Partition Information interface.
[in]	Start	Start Block.
[in]	End	End Block.
[in]	BlockSize	Child block size.
[in]	TypeGuid	Partition GUID Type.

Return values

EFI_SUCCESS	A child handle was added.
other	A child handle was not added.

Definition at line 1134 of file Partition.c.

◆ PartitionOnAccessComplete()

VOID EFIAPI PartitionOnAccessComplete	(	IN EFI_EVENT	Event,
		IN VOID *	Context
	)

The general callback for the DiskIo2 interfaces.

Parameters

Event	Event whose notification function is being invoked.
Context	The pointer to the notification function's context, which points to the PARTITION_ACCESS_TASK instance.

Definition at line 850 of file Partition.c.

◆ PartitionReadBlocks()

EFI_STATUS EFIAPI PartitionReadBlocks	(	IN EFI_BLOCK_IO_PROTOCOL *	This,
		IN UINT32	MediaId,
		IN EFI_LBA	Lba,
		IN UINTN	BufferSize,
		OUT VOID *	Buffer
	)

Read by using the Disk IO protocol on the parent device. Lba addresses must be converted to byte offsets.

Parameters

This	Protocol instance pointer.
MediaId	Id of the media, changes every time the media is replaced.
Lba	The starting Logical Block Address to read from
BufferSize	Size of Buffer, must be a multiple of device block size.
Buffer	Buffer containing read data

Return values

EFI_SUCCESS	The data was read correctly from the device.
EFI_DEVICE_ERROR	The device reported an error while performing the read.
EFI_NO_MEDIA	There is no media in the device.
EFI_MEDIA_CHANGED	The MediaId does not matched the current device.
EFI_BAD_BUFFER_SIZE	The Buffer was not a multiple of the block size of the device.
EFI_INVALID_PARAMETER	The read request contains device addresses that are not valid for the device.

Definition at line 672 of file Partition.c.

◆ PartitionReadBlocksEx()

EFI_STATUS EFIAPI PartitionReadBlocksEx	(	IN EFI_BLOCK_IO2_PROTOCOL *	This,
		IN UINT32	MediaId,
		IN EFI_LBA	Lba,
		IN OUT EFI_BLOCK_IO2_TOKEN *	Token,
		IN UINTN	BufferSize,
		OUT VOID *	Buffer
	)

Read BufferSize bytes from Lba into Buffer.

This function reads the requested number of blocks from the device. All the blocks are read, or an error is returned. If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.

Parameters

[in]	This	Indicates a pointer to the calling context.
[in]	MediaId	Id of the media, changes every time the media is replaced.
[in]	Lba	The starting Logical Block Address to read from.
[in,out]	Token	A pointer to the token associated with the transaction.
[in]	BufferSize	Size of Buffer, must be a multiple of device block size.
[out]	Buffer	A pointer to the destination buffer for the data. The caller is responsible for either having implicit or explicit ownership of the buffer.

Return values

EFI_SUCCESS	The read request was queued if Token->Event is not NULL.The data was read correctly from the device if the Token->Event is NULL.
EFI_DEVICE_ERROR	The device reported an error while performing the read.
EFI_NO_MEDIA	There is no media in the device.
EFI_MEDIA_CHANGED	The MediaId is not for the current media.
EFI_BAD_BUFFER_SIZE	The BufferSize parameter is not a multiple of the intrinsic block size of the device.
EFI_INVALID_PARAMETER	The read request contains LBAs that are not valid, or the buffer is not on proper alignment.
EFI_OUT_OF_RESOURCES	The request could not be completed due to a lack of resources.

Definition at line 939 of file Partition.c.

◆ PartitionReset()

EFI_STATUS EFIAPI PartitionReset	(	IN EFI_BLOCK_IO_PROTOCOL *	This,
		IN BOOLEAN	ExtendedVerification
	)

Reset the Block Device.

Parameters

This	Protocol instance pointer.
ExtendedVerification	Driver may perform diagnostics on reset.

Return values

EFI_SUCCESS	The device was reset.
EFI_DEVICE_ERROR	The device is not functioning properly and could not be reset.

Definition at line 599 of file Partition.c.

◆ PartitionResetEx()

EFI_STATUS EFIAPI PartitionResetEx	(	IN EFI_BLOCK_IO2_PROTOCOL *	This,
		IN BOOLEAN	ExtendedVerification
	)

Reset the Block Device throught Block I/O2 protocol.

Parameters

This	Protocol instance pointer.
ExtendedVerification	Driver may perform diagnostics on reset.

Return values

EFI_SUCCESS	The device was reset.
EFI_DEVICE_ERROR	The device is not functioning properly and could not be reset.

Definition at line 827 of file Partition.c.

◆ PartitionWriteBlocks()

EFI_STATUS EFIAPI PartitionWriteBlocks	(	IN EFI_BLOCK_IO_PROTOCOL *	This,
		IN UINT32	MediaId,
		IN EFI_LBA	Lba,
		IN UINTN	BufferSize,
		IN VOID *	Buffer
	)

Write by using the Disk IO protocol on the parent device. Lba addresses must be converted to byte offsets.

Parameters

[in]	This	Protocol instance pointer.
[in]	MediaId	Id of the media, changes every time the media is replaced.
[in]	Lba	The starting Logical Block Address to read from
[in]	BufferSize	Size of Buffer, must be a multiple of device block size.
[in]	Buffer	Buffer containing data to be written to device.

Return values

EFI_SUCCESS	The data was written correctly to the device.
EFI_WRITE_PROTECTED	The device can not be written to.
EFI_DEVICE_ERROR	The device reported an error while performing the write.
EFI_NO_MEDIA	There is no media in the device.
EFI_MEDIA_CHNAGED	The MediaId does not matched the current device.
EFI_BAD_BUFFER_SIZE	The Buffer was not a multiple of the block size of the device.
EFI_INVALID_PARAMETER	The write request contains a LBA that is not valid for the device.

Definition at line 724 of file Partition.c.

◆ PartitionWriteBlocksEx()

EFI_STATUS EFIAPI PartitionWriteBlocksEx	(	IN EFI_BLOCK_IO2_PROTOCOL *	This,
		IN UINT32	MediaId,
		IN EFI_LBA	Lba,
		IN OUT EFI_BLOCK_IO2_TOKEN *	Token,
		IN UINTN	BufferSize,
		IN VOID *	Buffer
	)

Write BufferSize bytes from Lba into Buffer.

This function writes the requested number of blocks to the device. All blocks are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA, EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.

Parameters

[in]	This	Indicates a pointer to the calling context.
[in]	MediaId	The media ID that the write request is for.
[in]	Lba	The starting logical block address to be written. The caller is responsible for writing to only legitimate locations.
[in,out]	Token	A pointer to the token associated with the transaction.
[in]	BufferSize	Size of Buffer, must be a multiple of device block size.
[in]	Buffer	A pointer to the source buffer for the data.

Return values

EFI_SUCCESS	The write request was queued if Event is not NULL. The data was written correctly to the device if the Event is NULL.
EFI_WRITE_PROTECTED	The device can not be written to.
EFI_NO_MEDIA	There is no media in the device.
EFI_MEDIA_CHNAGED	The MediaId does not matched the current device.
EFI_DEVICE_ERROR	The device reported an error while performing the write.
EFI_BAD_BUFFER_SIZE	The Buffer was not a multiple of the block size of the device.
EFI_INVALID_PARAMETER	The write request contains LBAs that are not valid, or the buffer is not on proper alignment.
EFI_OUT_OF_RESOURCES	The request could not be completed due to a lack of resources.

Definition at line 1015 of file Partition.c.

◆ ProbeMediaStatus()

EFI_STATUS ProbeMediaStatus	(	IN EFI_DISK_IO_PROTOCOL *	DiskIo,
		IN UINT32	MediaId,
		IN EFI_STATUS	DefaultStatus
	)

Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED for no media or media change case. Otherwise DefaultStatus is returned.

Parameters

DiskIo	Pointer to the DiskIo instance.
MediaId	Id of the media, changes every time the media is replaced.
DefaultStatus	The default status to return when it's not the no media or media change case.

Return values

EFI_NO_MEDIA	There is no media.
EFI_MEDIA_CHANGED	The media was changed.
others	The default status to return.

Definition at line 628 of file Partition.c.

◆ ProbeMediaStatusEx()

EFI_STATUS ProbeMediaStatusEx	(	IN EFI_DISK_IO2_PROTOCOL *	DiskIo2,
		IN UINT32	MediaId,
		IN EFI_STATUS	DefaultStatus
	)

Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED for no media or media change case. Otherwise DefaultStatus is returned.

Parameters

DiskIo2	Pointer to the DiskIo2 instance.
MediaId	Id of the media, changes every time the media is replaced.
DefaultStatus	The default status to return when it's not the no media or media change case.

Return values

EFI_NO_MEDIA	There is no media.
EFI_MEDIA_CHANGED	The media was changed.
others	The default status to return.

Definition at line 791 of file Partition.c.

Variable Documentation

◆ gPartitionDriverBinding

EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding

Initial value:

= {
  PartitionDriverBindingSupported,
  PartitionDriverBindingStart,
  PartitionDriverBindingStop,
  
  0xb,
  NULL,
  NULL
}

Definition at line 18 of file Partition.c.

◆ mPartitionDetectRoutineTable

PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[]

Initial value:

= {
  PartitionInstallGptChildHandles,
  PartitionInstallUdfChildHandles,
  PartitionInstallMbrChildHandles,
  NULL
}

Definition at line 46 of file Partition.c.

Functions

Variables

Detailed Description

Function Documentation

◆ HasChildren()

◆ InitializePartition()

◆ PartitionCreateAccessTask()

◆ PartitionDriverBindingStart()

◆ PartitionDriverBindingStop()

◆ PartitionDriverBindingSupported()

◆ PartitionFlushBlocks()

◆ PartitionFlushBlocksEx()

◆ PartitionInstallChildHandle()

◆ PartitionOnAccessComplete()

◆ PartitionReadBlocks()

◆ PartitionReadBlocksEx()

◆ PartitionReset()

◆ PartitionResetEx()

◆ PartitionWriteBlocks()

◆ PartitionWriteBlocksEx()

◆ ProbeMediaStatus()

◆ ProbeMediaStatusEx()

Variable Documentation

◆ gPartitionDriverBinding

◆ mPartitionDetectRoutineTable