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/*++
Copyright (c) 2004 - 2007, 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.
Module Name:
EfiDriverModelLib.c
Abstract:
Light weight lib to support EFI drivers.
--*/
#include "Tiano.h"
#include "EfiDriverLib.h"
EFI_STATUS
EfiLibInstallDriverBinding (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE DriverBindingHandle
)
/*++
Routine Description:
Intialize a driver by installing the Driver Binding Protocol onto the
driver's DriverBindingHandle. This is typically the same as the driver's
ImageHandle, but it can be different if the driver produces multiple
DriverBinding Protocols. This function also initializes the EFI Driver
Library that initializes the global variables gST, gBS, gRT.
Arguments:
ImageHandle - The image handle of the driver
SystemTable - The EFI System Table that was passed to the driver's entry point
DriverBinding - A Driver Binding Protocol instance that this driver is producing
DriverBindingHandle - The handle that DriverBinding is to be installe onto. If this
parameter is NULL, then a new handle is created.
Returns:
EFI_SUCCESS is DriverBinding is installed onto DriverBindingHandle
Otherwise, then return status from gBS->InstallProtocolInterface()
--*/
{
EfiInitializeDriverLib (ImageHandle, SystemTable);
DriverBinding->ImageHandle = ImageHandle;
DriverBinding->DriverBindingHandle = DriverBindingHandle;
return gBS->InstallProtocolInterface (
&DriverBinding->DriverBindingHandle,
&gEfiDriverBindingProtocolGuid,
EFI_NATIVE_INTERFACE,
DriverBinding
);
}
EFI_STATUS
EfiLibInstallAllDriverProtocols (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE * SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL * DriverBinding,
IN EFI_HANDLE DriverBindingHandle,
#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
IN EFI_COMPONENT_NAME2_PROTOCOL * ComponentName, OPTIONAL
#else
IN EFI_COMPONENT_NAME_PROTOCOL * ComponentName, OPTIONAL
#endif
IN EFI_DRIVER_CONFIGURATION_PROTOCOL * DriverConfiguration, OPTIONAL
IN EFI_DRIVER_DIAGNOSTICS_PROTOCOL * DriverDiagnostics OPTIONAL
)
/*++
Routine Description:
Intialize a driver by installing the Driver Binding Protocol onto the
driver's DriverBindingHandle. This is typically the same as the driver's
ImageHandle, but it can be different if the driver produces multiple
DriverBinding Protocols. This function also initializes the EFI Driver
Library that initializes the global variables gST, gBS, gRT.
Arguments:
ImageHandle - The image handle of the driver
SystemTable - The EFI System Table that was passed to the driver's entry point
DriverBinding - A Driver Binding Protocol instance that this driver is producing
DriverBindingHandle - The handle that DriverBinding is to be installe onto. If this
parameter is NULL, then a new handle is created.
ComponentName - A Component Name Protocol instance that this driver is producing
DriverConfiguration - A Driver Configuration Protocol instance that this driver is producing
DriverDiagnostics - A Driver Diagnostics Protocol instance that this driver is producing
Returns:
EFI_SUCCESS if all the protocols were installed onto DriverBindingHandle
Otherwise, then return status from gBS->InstallProtocolInterface()
--*/
{
EFI_STATUS Status;
Status = EfiLibInstallDriverBinding (ImageHandle, SystemTable, DriverBinding, DriverBindingHandle);
if (EFI_ERROR (Status)) {
return Status;
}
if (ComponentName != NULL) {
Status = gBS->InstallProtocolInterface (
&DriverBinding->DriverBindingHandle,
#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
&gEfiComponentName2ProtocolGuid,
#else
&gEfiComponentNameProtocolGuid,
#endif
EFI_NATIVE_INTERFACE,
ComponentName
);
if (EFI_ERROR (Status)) {
return Status;
}
}
if (DriverConfiguration != NULL) {
Status = gBS->InstallProtocolInterface (
&DriverBinding->DriverBindingHandle,
&gEfiDriverConfigurationProtocolGuid,
EFI_NATIVE_INTERFACE,
DriverConfiguration
);
if (EFI_ERROR (Status)) {
return Status;
}
}
if (DriverDiagnostics != NULL) {
Status = gBS->InstallProtocolInterface (
&DriverBinding->DriverBindingHandle,
&gEfiDriverDiagnosticsProtocolGuid,
EFI_NATIVE_INTERFACE,
DriverDiagnostics
);
if (EFI_ERROR (Status)) {
return Status;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
EfiLibTestManagedDevice (
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE DriverBindingHandle,
IN EFI_GUID *ManagedProtocolGuid
)
/*++
Routine Description:
Test to see if the controller is managed by a specific driver.
Arguments:
ControllerHandle - Handle for controller to test
DriverBindingHandle - Driver binding handle for controller
ManagedProtocolGuid - The protocol guid the driver opens on controller
Returns:
EFI_SUCCESS - The controller is managed by the driver
EFI_UNSUPPORTED - The controller is not managed by the driver
--*/
{
EFI_STATUS Status;
VOID *ManagedInterface;
Status = gBS->OpenProtocol (
ControllerHandle,
ManagedProtocolGuid,
&ManagedInterface,
DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (!EFI_ERROR (Status)) {
gBS->CloseProtocol (
ControllerHandle,
ManagedProtocolGuid,
DriverBindingHandle,
ControllerHandle
);
return EFI_UNSUPPORTED;
}
if (Status != EFI_ALREADY_STARTED) {
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
EFI_STATUS
EfiLibTestChildHandle (
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle,
IN EFI_GUID *ConsumedGuid
)
/*++
Routine Description:
Test to see if the child handle is the child of the controller
Arguments:
ControllerHandle - Handle for controller (parent)
ChildHandle - Child handle to test
ConsumsedGuid - Protocol guid consumed by child from controller
Returns:
EFI_SUCCESS - The child handle is the child of the controller
EFI_UNSUPPORTED - The child handle is not the child of the controller
--*/
{
EFI_STATUS Status;
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;
UINTN EntryCount;
UINTN Index;
//
// Retrieve the list of agents that are consuming one of the protocols
// on ControllerHandle that the children consume
//
Status = gBS->OpenProtocolInformation (
ControllerHandle,
ConsumedGuid,
&OpenInfoBuffer,
&EntryCount
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
//
// See if one of the agents is ChildHandle
//
Status = EFI_UNSUPPORTED;
for (Index = 0; Index < EntryCount; Index++) {
if (OpenInfoBuffer[Index].ControllerHandle == ChildHandle &&
OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {
Status = EFI_SUCCESS;
}
}
gBS->FreePool (OpenInfoBuffer);
return Status;
}
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