audk/ShellPkg/Include/Library/HandleParsingLib.h

/** @file
  Provides interface to advanced shell functionality for parsing both handle and protocol database.

  Copyright (c) 2010, 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 __HANDLE_PARSING_LIB__
#define __HANDLE_PARSING_LIB__

#include <Uefi.h>

/**
  Function to get the name of a protocol or struct from it's GUID.

  If Guid is NULL, then ASSERT.

  @param[in] Guid               The GUID to look for the name of.
  @param[in] Lang               The language to use.

  @return                       The pointer to a string of the name.  The caller
                                is responsible to free this memory.
**/
CHAR16*
EFIAPI
GetStringNameFromGuid(
  IN CONST EFI_GUID *Guid,
  IN CONST CHAR8    *Lang OPTIONAL
  );

/**
  Function to get the Guid for a protocol or struct based on it's string name.

  @param[in] Name           The pointer to the string name.
  @param[in] Lang           The pointer to the language code (string).
  @param[in] Guid           The pointer to the pointer to the Guid.

  @retval EFI_SUCCESS       The operation was successful.
**/
EFI_STATUS
EFIAPI
GetGuidFromStringName(
  IN CONST CHAR16 *Name,
  IN CONST CHAR8  *Lang OPTIONAL,
  IN EFI_GUID     **Guid
  );

/**
  Function to dump protocol information from a handle.

  This function will return a allocated string buffer containing the
  information.  The caller is responsible for freeing the memory.

  If Guid is NULL, ASSERT().
  If TheHandle is NULL, ASSERT().

  @param[in] TheHandle      The handle to dump information from.
  @param[in] Guid           The GUID of the protocol to dump.
  @param[in] Verbose        TRUE for extra info.  FALSE otherwise.

  @return                   The pointer to string.
  @retval NULL              An error was encountered.
**/
CHAR16*
EFIAPI
GetProtocolInformationDump(
  IN CONST EFI_HANDLE TheHandle,
  IN CONST EFI_GUID   *Guid,
  IN CONST BOOLEAN    Verbose
  );

/**
  Function to retrieve the driver name (if possible) from the ComponentName or
  ComponentName2 protocol.

  The string returned must be callee freed.

  @param[in] TheHandle      The driver handle to get the name of.
  @param[in] Language       The language to use.

  @retval NULL              The name could not be found.
  @return                   A pointer to the string name.  Do not de-allocate the memory.
**/
CONST CHAR16*
EFIAPI
GetStringNameFromHandle(
  IN CONST EFI_HANDLE TheHandle,
  IN CONST CHAR8      *Language
  );

#define HR_UNKNOWN                     0
#define HR_IMAGE_HANDLE                BIT1
#define HR_DRIVER_BINDING_HANDLE       BIT2 // has driver binding
#define HR_DEVICE_DRIVER               BIT3 // device driver (hybrid?)
#define HR_BUS_DRIVER                  BIT4 // a bus driver  (hybrid?)
#define HR_DRIVER_CONFIGURATION_HANDLE BIT5
#define HR_DRIVER_DIAGNOSTICS_HANDLE   BIT6
#define HR_COMPONENT_NAME_HANDLE       BIT7
#define HR_DEVICE_HANDLE               BIT8
#define HR_PARENT_HANDLE               BIT9
#define HR_CONTROLLER_HANDLE           BIT10
#define HR_CHILD_HANDLE                BIT11
#define HR_VALID_MASK                  (BIT1|BIT2|BIT3|BIT4|BIT5|BIT6|BIT7|BIT8|BIT9|BIT10|BIT11)

/**
  Gets all the related EFI_HANDLEs based on the mask supplied.

  This function will scan all EFI_HANDLES in the UEFI environment's handle database
  and return all the ones with the specified relationship (Mask) to the specified
  controller handle.

  If both DriverBindingHandle and ControllerHandle are NULL, then ASSERT.
  If MatchingHandleCount is NULL, then ASSERT.

  If MatchingHandleBuffer is not NULL upon a successful return, the memory must be
  caller freed.

  @param[in] DriverBindingHandle    The handle with Driver Binding protocol on it.
  @param[in] ControllerHandle       The handle with Device Path protocol on it.
  @param[in] Mask                   The mask of what relationship(s) is desired.
  @param[in] MatchingHandleCount    The pointer to UINTN specifying number of HANDLES in
                                    MatchingHandleBuffer.
  @param[out] MatchingHandleBuffer  On a successful return, a buffer of MatchingHandleCount
                                    EFI_HANDLEs with a terminating NULL EFI_HANDLE.

  @retval EFI_SUCCESS               The operation was successful, and any related handles
                                    are in MatchingHandleBuffer.
  @retval EFI_NOT_FOUND             No matching handles were found.
  @retval EFI_INVALID_PARAMETER     A parameter was invalid or out of range.
  @sa ParseHandleDatabaseByRelationshipWithType
**/
EFI_STATUS
EFIAPI
ParseHandleDatabaseByRelationship (
  IN CONST EFI_HANDLE       DriverBindingHandle OPTIONAL,
  IN CONST EFI_HANDLE       ControllerHandle OPTIONAL,
  IN CONST UINTN            Mask,
  IN UINTN                  *MatchingHandleCount,
  OUT EFI_HANDLE            **MatchingHandleBuffer OPTIONAL
  );

/**
  Gets all the related EFI_HANDLEs based on the mask supplied.

  This function scans all EFI_HANDLES in the UEFI environment's handle database
  and returns the ones with the specified relationship (Mask) to the specified
  controller handle.

  If both DriverBindingHandle and ControllerHandle are NULL, then ASSERT.
  If MatchingHandleCount is NULL, then ASSERT.

  If MatchingHandleBuffer is not NULL upon a successful return the memory must be
  caller freed.

  @param[in] DriverBindingHandle    The handle with Driver Binding protocol on it.
  @param[in] ControllerHandle       The handle with Device Path protocol on it.
  @param[in] MatchingHandleCount    The pointer to UINTN that specifies the number of HANDLES in
                                    MatchingHandleBuffer.
  @param[out] MatchingHandleBuffer  On a successful return, a buffer of MatchingHandleCount
                                    EFI_HANDLEs with a terminating NULL EFI_HANDLE.
  @param[out] HandleType            An array of type information.

  @retval EFI_SUCCESS               The operation was successful, and any related handles
                                    are in MatchingHandleBuffer.
  @retval EFI_NOT_FOUND             No matching handles were found.
  @retval EFI_INVALID_PARAMETER     A parameter was invalid or out of range.
**/
EFI_STATUS
EFIAPI
ParseHandleDatabaseByRelationshipWithType (
  IN CONST EFI_HANDLE DriverBindingHandle OPTIONAL,
  IN CONST EFI_HANDLE ControllerHandle OPTIONAL,
  IN UINTN            *HandleCount,
  OUT EFI_HANDLE      **HandleBuffer,
  OUT UINTN           **HandleType
  );

/**
  Gets handles for any parents of the passed in controller.

  @param[in] ControllerHandle       The handle of the controller.
  @param[in] Count                  The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] Buffer                The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
#define PARSE_HANDLE_DATABASE_PARENTS(ControllerHandle, Count, Buffer) \
  ParseHandleDatabaseByRelationship(NULL, ControllerHandle, HR_PARENT_HANDLE, Count, Buffer)

/**
  Gets handles for any UEFI drivers of the passed in controller.

  @param[in] ControllerHandle       The handle of the controller.
  @param[in] Count                  The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] Buffer                The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
#define PARSE_HANDLE_DATABASE_UEFI_DRIVERS(ControllerHandle, Count, Buffer) \
  ParseHandleDatabaseByRelationship(NULL, ControllerHandle, HR_DRIVER_BINDING_HANDLE|HR_DEVICE_DRIVER, Count, Buffer)

/**
  Gets handles for any children of the passed in controller by the passed in driver handle.

  @param[in] DriverHandle           The handle of the driver.
  @param[in] ControllerHandle       The handle of the controller.
  @param[in] Count                  The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] Buffer                The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
#define PARSE_HANDLE_DATABASE_MANAGED_CHILDREN(DriverHandle, ControllerHandle, Count, Buffer) \
  ParseHandleDatabaseByRelationship(DriverHandle, ControllerHandle, HR_CHILD_HANDLE|HR_DEVICE_HANDLE, Count, Buffer)

/**
  Gets handles for any devices managed by the passed in driver.

  @param[in] DriverHandle           The handle of the driver.
  @param[in] Count                  The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] Buffer                The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
#define PARSE_HANDLE_DATABASE_DEVICES(DriverHandle, Count, Buffer) \
  ParseHandleDatabaseByRelationship(DriverHandle, NULL, HR_CONTROLLER_HANDLE|HR_DEVICE_HANDLE, Count, Buffer)

/**
  Gets handles for any child devices produced by the passed in driver.

  @param[in] DriverHandle           The handle of the driver.
  @param[in] MatchingHandleCount    The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] MatchingHandleBuffer  The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
EFI_STATUS
EFIAPI
ParseHandleDatabaseForChildDevices(
  IN CONST EFI_HANDLE       DriverHandle,
  IN UINTN                  *MatchingHandleCount,
  OUT EFI_HANDLE            **MatchingHandleBuffer OPTIONAL
  );

/**
  Gets handles for any child controllers of the passed in controller.

  @param[in] ControllerHandle       The handle of the "parent controller".
  @param[in] MatchingHandleCount    The pointer to the number of handles in
                                    MatchingHandleBuffer on return.
  @param[out] MatchingHandleBuffer  The buffer containing handles on a successful
                                    return.
  @retval EFI_SUCCESS               The operation was successful.
  @sa ParseHandleDatabaseByRelationship
**/
EFI_STATUS
EFIAPI
ParseHandleDatabaseForChildControllers(
  IN CONST EFI_HANDLE       ControllerHandle,
  IN UINTN                  *MatchingHandleCount,
  OUT EFI_HANDLE            **MatchingHandleBuffer OPTIONAL
  );


/**
  Function to retrieve the human-friendly index of a given handle.  If the handle
  does not have a index one will be automatically assigned.  The index value is valid
  until the termination of the shell application.

  @param[in] TheHandle    The handle to retrieve an index for.

  @retval 0               A memory allocation failed.
  @return                 The index of the handle.

**/
UINTN
EFIAPI
ConvertHandleToHandleIndex(
  IN CONST EFI_HANDLE TheHandle
  );

/**
  Function to retrieve the EFI_HANDLE from the human-friendly index.

  @param[in] TheIndex     The index to retrieve the EFI_HANDLE for.

  @retval NULL            The index was invalid.
  @return                 The EFI_HANDLE that index represents.

**/
EFI_HANDLE
EFIAPI
ConvertHandleIndexToHandle(
  IN CONST UINTN TheIndex
  );

/**
  Function to get all handles that support a given protocol or all handles.

  @param[in] ProtocolGuid The guid of the protocol to get handles for.  If NULL
                          then the function will return all handles.

  @retval NULL            A memory allocation failed.
  @return                 A NULL terminated list of handles.
**/
EFI_HANDLE*
EFIAPI
GetHandleListByProtocol (
  IN CONST EFI_GUID *ProtocolGuid OPTIONAL
  );

/**
  Function to get all handles that support some protocols.

  @param[in] ProtocolGuids  A NULL terminated list of protocol GUIDs.

  @retval NULL              A memory allocation failed.
  @retval NULL              ProtocolGuids was NULL.
  @return                   A NULL terminated list of EFI_HANDLEs.
**/
EFI_HANDLE*
EFIAPI
GetHandleListByProtocolList (
  IN CONST EFI_GUID **ProtocolGuids
  );

#endif // __HANDLE_PARSING_LIB__