audk/MdeModulePkg/Core/Dxe/Hand/Handle.h

271 lines
7.9 KiB
C

/** @file
Support functions for managing protocol.
Copyright (c) 2006 - 2008, Intel Corporation. <BR>
All rights reserved. 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 _HAND_H_
#define _HAND_H_
#define EFI_HANDLE_SIGNATURE EFI_SIGNATURE_32('h','n','d','l')
///
/// IHANDLE - contains a list of protocol handles
///
typedef struct {
UINTN Signature;
/// All handles list of IHANDLE
LIST_ENTRY AllHandles;
/// List of PROTOCOL_INTERFACE's for this handle
LIST_ENTRY Protocols;
UINTN LocateRequest;
/// The Handle Database Key value when this handle was last created or modified
UINT64 Key;
} IHANDLE;
#define ASSERT_IS_HANDLE(a) ASSERT((a)->Signature == EFI_HANDLE_SIGNATURE)
#define PROTOCOL_ENTRY_SIGNATURE EFI_SIGNATURE_32('p','r','t','e')
///
/// PROTOCOL_ENTRY - each different protocol has 1 entry in the protocol
/// database. Each handler that supports this protocol is listed, along
/// with a list of registered notifies.
///
typedef struct {
UINTN Signature;
/// Link Entry inserted to mProtocolDatabase
LIST_ENTRY AllEntries;
/// ID of the protocol
EFI_GUID ProtocolID;
/// All protocol interfaces
LIST_ENTRY Protocols;
/// Registerd notification handlers
LIST_ENTRY Notify;
} PROTOCOL_ENTRY;
#define PROTOCOL_INTERFACE_SIGNATURE EFI_SIGNATURE_32('p','i','f','c')
///
/// PROTOCOL_INTERFACE - each protocol installed on a handle is tracked
/// with a protocol interface structure
///
typedef struct {
UINTN Signature;
/// Link on IHANDLE.Protocols
LIST_ENTRY Link;
/// Back pointer
IHANDLE *Handle;
/// Link on PROTOCOL_ENTRY.Protocols
LIST_ENTRY ByProtocol;
/// The protocol ID
PROTOCOL_ENTRY *Protocol;
/// The interface value
VOID *Interface;
/// OPEN_PROTOCOL_DATA list
LIST_ENTRY OpenList;
UINTN OpenListCount;
} PROTOCOL_INTERFACE;
#define OPEN_PROTOCOL_DATA_SIGNATURE EFI_SIGNATURE_32('p','o','d','l')
typedef struct {
UINTN Signature;
///Link on PROTOCOL_INTERFACE.OpenList
LIST_ENTRY Link;
EFI_HANDLE AgentHandle;
EFI_HANDLE ControllerHandle;
UINT32 Attributes;
UINT32 OpenCount;
} OPEN_PROTOCOL_DATA;
#define PROTOCOL_NOTIFY_SIGNATURE EFI_SIGNATURE_32('p','r','t','n')
///
/// PROTOCOL_NOTIFY - used for each register notification for a protocol
///
typedef struct {
UINTN Signature;
PROTOCOL_ENTRY *Protocol;
/// All notifications for this protocol
LIST_ENTRY Link;
/// Event to notify
EFI_EVENT Event;
/// Last position notified
LIST_ENTRY *Position;
} PROTOCOL_NOTIFY;
/**
Finds the protocol entry for the requested protocol.
The gProtocolDatabaseLock must be owned
@param Protocol The ID of the protocol
@param Create Create a new entry if not found
@return Protocol entry
**/
PROTOCOL_ENTRY *
CoreFindProtocolEntry (
IN EFI_GUID *Protocol,
IN BOOLEAN Create
);
/**
Signal event for every protocol in protocol entry.
@param ProtEntry Protocol entry
**/
VOID
CoreNotifyProtocolEntry (
IN PROTOCOL_ENTRY *ProtEntry
);
/**
Finds the protocol instance for the requested handle and protocol.
Note: This function doesn't do parameters checking, it's caller's responsibility
to pass in valid parameters.
@param Handle The handle to search the protocol on
@param Protocol GUID of the protocol
@param Interface The interface for the protocol being searched
@return Protocol instance (NULL: Not found)
**/
PROTOCOL_INTERFACE *
CoreFindProtocolInterface (
IN IHANDLE *Handle,
IN EFI_GUID *Protocol,
IN VOID *Interface
);
/**
Removes Protocol from the protocol list (but not the handle list).
@param Handle The handle to remove protocol on.
@param Protocol GUID of the protocol to be moved
@param Interface The interface of the protocol
@return Protocol Entry
**/
PROTOCOL_INTERFACE *
CoreRemoveInterfaceFromProtocol (
IN IHANDLE *Handle,
IN EFI_GUID *Protocol,
IN VOID *Interface
);
/**
Connects a controller to a driver.
@param ControllerHandle Handle of the controller to be
connected.
@param ContextDriverImageHandles DriverImageHandle A pointer to an
ordered list of driver image
handles.
@param RemainingDevicePath RemainingDevicePath A pointer to
the device path that specifies a
child of the controller
specified by ControllerHandle.
@retval EFI_SUCCESS One or more drivers were
connected to ControllerHandle.
@retval EFI_OUT_OF_RESOURCES No enough system resources to
complete the request.
@retval EFI_NOT_FOUND No drivers were connected to
ControllerHandle.
**/
EFI_STATUS
CoreConnectSingleController (
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE *ContextDriverImageHandles OPTIONAL,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
);
/**
Attempts to disconnect all drivers that are using the protocol interface being queried.
If failed, reconnect all drivers disconnected.
Note: This function doesn't do parameters checking, it's caller's responsibility
to pass in valid parameters.
@param UserHandle The handle on which the protocol is installed
@param Prot The protocol to disconnect drivers from
@retval EFI_SUCCESS Drivers using the protocol interface are all
disconnected
@retval EFI_ACCESS_DENIED Failed to disconnect one or all of the drivers
**/
EFI_STATUS
CoreDisconnectControllersUsingProtocolInterface (
IN EFI_HANDLE UserHandle,
IN PROTOCOL_INTERFACE *Prot
);
/**
Acquire lock on gProtocolDatabaseLock.
**/
VOID
CoreAcquireProtocolLock (
VOID
);
/**
Release lock on gProtocolDatabaseLock.
**/
VOID
CoreReleaseProtocolLock (
VOID
);
/**
Check whether a handle is a valid EFI_HANDLE
@param UserHandle The handle to check
@retval EFI_INVALID_PARAMETER The handle is NULL or not a valid EFI_HANDLE.
@retval EFI_SUCCESS The handle is valid EFI_HANDLE.
**/
EFI_STATUS
CoreValidateHandle (
IN EFI_HANDLE UserHandle
);
//
// Externs
//
extern EFI_LOCK gProtocolDatabaseLock;
extern LIST_ENTRY gHandleList;
extern UINT64 gHandleDatabaseKey;
#endif