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/** @file
Support functions for managing protocol.
Copyright (c) 2006 - 2008, Intel Corporation
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_
//
// IHANDLE - contains a list of protocol handles
//
#define EFI_HANDLE_SIGNATURE EFI_SIGNATURE_32('h','n','d','l')
typedef struct {
UINTN Signature;
LIST_ENTRY AllHandles; // All handles list of IHANDLE
LIST_ENTRY Protocols; // List of PROTOCOL_INTERFACE's for this handle
UINTN LocateRequest; //
UINT64 Key; // The Handle Database Key value when this handle was last created or modified
} IHANDLE;
#define ASSERT_IS_HANDLE(a) ASSERT((a)->Signature == EFI_HANDLE_SIGNATURE)
//
// 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.
//
#define PROTOCOL_ENTRY_SIGNATURE EFI_SIGNATURE_32('p','r','t','e')
typedef struct {
UINTN Signature;
LIST_ENTRY AllEntries; // All entries
EFI_GUID ProtocolID; // ID of the protocol
LIST_ENTRY Protocols; // All protocol interfaces
LIST_ENTRY Notify; // Registerd notification handlers
} PROTOCOL_ENTRY;
//
// PROTOCOL_INTERFACE - each protocol installed on a handle is tracked
// with a protocol interface structure
//
#define PROTOCOL_INTERFACE_SIGNATURE EFI_SIGNATURE_32('p','i','f','c')
typedef struct {
UINTN Signature;
EFI_HANDLE Handle; // Back pointer
LIST_ENTRY Link; // Link on IHANDLE.Protocols
LIST_ENTRY ByProtocol; // Link on PROTOCOL_ENTRY.Protocols
PROTOCOL_ENTRY *Protocol; // The protocol ID
VOID *Interface; // The interface value
LIST_ENTRY OpenList; // OPEN_PROTOCOL_DATA list.
UINTN OpenListCount;
EFI_HANDLE ControllerHandle;
} PROTOCOL_INTERFACE;
#define OPEN_PROTOCOL_DATA_SIGNATURE EFI_SIGNATURE_32('p','o','d','l')
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
EFI_HANDLE AgentHandle;
EFI_HANDLE ControllerHandle;
UINT32 Attributes;
UINT32 OpenCount;
} OPEN_PROTOCOL_DATA;
//
// PROTOCOL_NOTIFY - used for each register notification for a protocol
//
#define PROTOCOL_NOTIFY_SIGNATURE EFI_SIGNATURE_32('p','r','t','n')
typedef struct {
UINTN Signature;
PROTOCOL_ENTRY *Protocol;
LIST_ENTRY Link; // All notifications for this protocol
EFI_EVENT Event; // Event to notify
LIST_ENTRY *Position; // Last position notified
} PROTOCOL_NOTIFY;
//
// Internal prototypes
//
/**
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
)
;
/**
Removes all the events in the protocol database that match Event.
@param Event The event to search for in the protocol
database.
@return EFI_SUCCESS when done searching the entire database.
**/
EFI_STATUS
CoreUnregisterProtocolNotify (
IN EFI_EVENT Event
)
;
/**
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
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