/** @file
  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", Legacy 
  MBR, and GPT partition schemes are supported.

Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _PARTITION_H_ 
#define _PARTITION_H_ 

#include <Uefi.h>
#include <Protocol/BlockIo.h>
#include <Guid/Gpt.h>
#include <Protocol/ComponentName.h>
#include <Protocol/DevicePath.h>
#include <Protocol/DriverBinding.h>
#include <Protocol/DiskIo.h>
#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>

#include <IndustryStandard/Mbr.h>
#include <IndustryStandard/ElTorito.h>


//
// Partition private data
//
#define PARTITION_PRIVATE_DATA_SIGNATURE  SIGNATURE_32 ('P', 'a', 'r', 't')
typedef struct {
  UINT64                    Signature;

  EFI_HANDLE                Handle;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  EFI_BLOCK_IO_PROTOCOL     BlockIo;
  EFI_BLOCK_IO_MEDIA        Media;

  EFI_DISK_IO_PROTOCOL      *DiskIo;
  EFI_BLOCK_IO_PROTOCOL     *ParentBlockIo;
  UINT64                    Start;
  UINT64                    End;
  UINT32                    BlockSize;

  EFI_GUID                  *EspGuid;

} PARTITION_PRIVATE_DATA;

#define PARTITION_DEVICE_FROM_BLOCK_IO_THIS(a)  CR (a, PARTITION_PRIVATE_DATA, BlockIo, PARTITION_PRIVATE_DATA_SIGNATURE)

//
// Global Variables
//
extern EFI_DRIVER_BINDING_PROTOCOL   gPartitionDriverBinding;
extern EFI_COMPONENT_NAME_PROTOCOL   gPartitionComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL  gPartitionComponentName2;

//
// Extract INT32 from char array
//
#define UNPACK_INT32(a) (INT32)( (((UINT8 *) a)[0] <<  0) |    \
                                 (((UINT8 *) a)[1] <<  8) |    \
                                 (((UINT8 *) a)[2] << 16) |    \
                                 (((UINT8 *) a)[3] << 24) )

//
// Extract UINT32 from char array
//
#define UNPACK_UINT32(a) (UINT32)( (((UINT8 *) a)[0] <<  0) |    \
                                   (((UINT8 *) a)[1] <<  8) |    \
                                   (((UINT8 *) a)[2] << 16) |    \
                                   (((UINT8 *) a)[3] << 24) )


//
// GPT Partition Entry Status
//
typedef struct {
  BOOLEAN OutOfRange;
  BOOLEAN Overlap;
  BOOLEAN OsSpecific;
} EFI_PARTITION_ENTRY_STATUS;

//
// Function Prototypes
//
/**
  Test to see if this driver supports ControllerHandle. Any ControllerHandle
  than contains a BlockIo and DiskIo protocol can be supported.

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

  @retval EFI_SUCCESS         This driver supports this device
  @retval EFI_ALREADY_STARTED This driver is already running on this device
  @retval other               This driver does not support this device

**/
EFI_STATUS
EFIAPI
PartitionDriverBindingSupported (
  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 and Disk IO
  protocol, reading Device Path, and creating a child handle with a
  Disk IO and device path protocol.

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

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

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

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

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

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

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

//
// EFI Component Name Functions
//
/**
  Retrieves a Unicode string that is the user readable name of the driver.

  This function retrieves the user readable name of a driver in the form of a
  Unicode string. If the driver specified by This has a user readable name in
  the language specified by Language, then a pointer to the driver name is
  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
  by This does not support the language specified by Language,
  then EFI_UNSUPPORTED is returned.

  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.

  @param  Language[in]          A pointer to a Null-terminated ASCII string
                                array indicating the language. This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified
                                in RFC 4646 or ISO 639-2 language code format.

  @param  DriverName[out]       A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                driver specified by This in the language
                                specified by Language.

  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
                                This and the language specified by Language was
                                returned in DriverName.

  @retval EFI_INVALID_PARAMETER Language is NULL.

  @retval EFI_INVALID_PARAMETER DriverName is NULL.

  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
PartitionComponentNameGetDriverName (
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
  IN  CHAR8                        *Language,
  OUT CHAR16                       **DriverName
  );


/**
  Retrieves a Unicode string that is the user readable name of the controller
  that is being managed by a driver.

  This function retrieves the user readable name of the controller specified by
  ControllerHandle and ChildHandle in the form of a Unicode string. If the
  driver specified by This has a user readable name in the language specified by
  Language, then a pointer to the controller name is returned in ControllerName,
  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
  managing the controller specified by ControllerHandle and ChildHandle,
  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
  support the language specified by Language, then EFI_UNSUPPORTED is returned.

  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.

  @param  ControllerHandle[in]  The handle of a controller that the driver
                                specified by This is managing.  This handle
                                specifies the controller whose name is to be
                                returned.

  @param  ChildHandle[in]       The handle of the child controller to retrieve
                                the name of.  This is an optional parameter that
                                may be NULL.  It will be NULL for device
                                drivers.  It will also be NULL for a bus drivers
                                that wish to retrieve the name of the bus
                                controller.  It will not be NULL for a bus
                                driver that wishes to retrieve the name of a
                                child controller.

  @param  Language[in]          A pointer to a Null-terminated ASCII string
                                array indicating the language.  This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified in
                                RFC 4646 or ISO 639-2 language code format.

  @param  ControllerName[out]   A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                controller specified by ControllerHandle and
                                ChildHandle in the language specified by
                                Language from the point of view of the driver
                                specified by This.

  @retval EFI_SUCCESS           The Unicode string for the user readable name in
                                the language specified by Language for the
                                driver specified by This was returned in
                                DriverName.

  @retval EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.

  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
                                EFI_HANDLE.

  @retval EFI_INVALID_PARAMETER Language is NULL.

  @retval EFI_INVALID_PARAMETER ControllerName is NULL.

  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
                                managing the controller specified by
                                ControllerHandle and ChildHandle.

  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
PartitionComponentNameGetControllerName (
  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
  IN  EFI_HANDLE                                      ControllerHandle,
  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
  IN  CHAR8                                           *Language,
  OUT CHAR16                                          **ControllerName
  );


/**
  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
  );

/**
  Install child handles if the Handle supports GPT partition structure.

  @param[in]  This       - Calling context.
  @param[in]  Handle     - Parent Handle
  @param[in]  DiskIo     - Parent DiskIo interface
  @param[in]  BlockIo    - Parent BlockIo interface
  @param[in]  DevicePath - Parent Device Path

  @retval EFI_SUCCESS         Valid GPT disk
  @retval EFI_MEDIA_CHANGED   Media changed Detected
  @retval other               Not a valid GPT disk

**/
EFI_STATUS
PartitionInstallGptChildHandles (
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN  EFI_HANDLE                   Handle,
  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,
  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath
  );

/**
  Install child handles if the Handle supports El Torito format.

  @param[in]  This        Calling context.
  @param[in]  Handle      Parent Handle
  @param[in]  DiskIo      Parent DiskIo interface
  @param[in]  BlockIo     Parent BlockIo interface
  @param[in]  DevicePath  Parent Device Path


  @retval EFI_SUCCESS         Child handle(s) was added
  @retval EFI_MEDIA_CHANGED   Media changed Detected
  @retval other               no child handle was added

**/
EFI_STATUS
PartitionInstallElToritoChildHandles (
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN  EFI_HANDLE                   Handle,
  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,
  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath
  );

/**
  Install child handles if the Handle supports MBR format.

  @param  This              Calling context.
  @param  Handle            Parent Handle.
  @param  DiskIo            Parent DiskIo interface.
  @param  BlockIo           Parent BlockIo interface.
  @param  DevicePath        Parent Device Path.
   
  @retval EFI_SUCCESS       A child handle was added.
  @retval EFI_MEDIA_CHANGED Media change was detected.
  @retval Others            MBR partition was not found.

**/
EFI_STATUS
PartitionInstallMbrChildHandles (
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN  EFI_HANDLE                   Handle,
  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,
  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath
  );

typedef
EFI_STATUS
(*PARTITION_DETECT_ROUTINE) (
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN  EFI_HANDLE                   Handle,
  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,
  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath
  );

#endif