audk/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c

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/** @file
Copyright (c) 2005 - 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.
Module Name:
MnpDriver.c
Abstract:
**/
#include "MnpDriver.h"
#include "MnpImpl.h"
EFI_DRIVER_BINDING_PROTOCOL gMnpDriverBinding = {
MnpDriverBindingSupported,
MnpDriverBindingStart,
MnpDriverBindingStop,
0xa,
NULL,
NULL
};
/**
Test to see if this driver supports ControllerHandle. This service
is called by the EFI boot service ConnectController(). In
order to make drivers as small as possible, there are a few calling
restrictions for this service. ConnectController() must
follow these calling restrictions. If any other agent wishes to call
Supported() it must also follow these calling restrictions.
@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
MnpDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
//
// Test to see if MNP is already installed.
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiManagedNetworkServiceBindingProtocolGuid,
NULL,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (!EFI_ERROR (Status)) {
return EFI_ALREADY_STARTED;
}
//
// Test to open the Simple Network protocol BY_DRIVER.
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiSimpleNetworkProtocolGuid,
(VOID **) &Snp,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close the openned SNP protocol.
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiSimpleNetworkProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return EFI_SUCCESS;
}
/**
Start this driver on ControllerHandle. This service is called by the
EFI boot service ConnectController(). In order to make
drivers as small as possible, there are a few calling restrictions for
this service. ConnectController() must follow these
calling restrictions. If any other agent wishes to call Start() it
must also follow these calling restrictions.
@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
MnpDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
MNP_SERVICE_DATA *MnpServiceData;
BOOLEAN MnpInitialized;
MnpInitialized = FALSE;
MnpServiceData = AllocateZeroPool (sizeof (MNP_SERVICE_DATA));
if (MnpServiceData == NULL) {
DEBUG ((EFI_D_ERROR, "MnpDriverBindingStart(): Failed to allocate the Mnp Service Data.\n"));
return EFI_OUT_OF_RESOURCES;
}
//
// Initialize the Mnp Service Data.
//
Status = MnpInitializeServiceData (MnpServiceData, This->DriverBindingHandle, ControllerHandle);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "MnpDriverBindingStart: MnpInitializeServiceData failed, %r.\n",Status));
goto ErrorExit;
}
MnpInitialized = TRUE;
//
// Install the MNP Service Binding Protocol.
//
Status = gBS->InstallMultipleProtocolInterfaces (
&ControllerHandle,
&gEfiManagedNetworkServiceBindingProtocolGuid,
&MnpServiceData->ServiceBinding,
NULL
);
ErrorExit:
if (EFI_ERROR (Status)) {
if (MnpInitialized) {
//
// Flush the Mnp Service Data.
//
MnpFlushServiceData (MnpServiceData, This->DriverBindingHandle);
}
gBS->FreePool (MnpServiceData);
}
return Status;
}
/**
Stop this driver on ControllerHandle. This service is called by the
EFI boot service DisconnectController(). In order to
make drivers as small as possible, there are a few calling
restrictions for this service. DisconnectController()
must follow these calling restrictions. If any other agent wishes
to call Stop() it must also follow these calling restrictions.
@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
MnpDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status;
EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
MNP_SERVICE_DATA *MnpServiceData;
MNP_INSTANCE_DATA *Instance;
//
// Retrieve the MNP service binding protocol from the ControllerHandle.
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiManagedNetworkServiceBindingProtocolGuid,
(VOID **) &ServiceBinding,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
DEBUG (
(EFI_D_ERROR,
"MnpDriverBindingStop: Locate MNP Service Binding Protocol failed, %r.\n",
Status)
);
return EFI_DEVICE_ERROR;
}
MnpServiceData = MNP_SERVICE_DATA_FROM_THIS (ServiceBinding);
if (NumberOfChildren == 0) {
//
// Uninstall the MNP Service Binding Protocol.
//
gBS->UninstallMultipleProtocolInterfaces (
ControllerHandle,
&gEfiManagedNetworkServiceBindingProtocolGuid,
ServiceBinding,
NULL
);
//
// Flush the Mnp service data.
//
MnpFlushServiceData (MnpServiceData, This->DriverBindingHandle);
gBS->FreePool (MnpServiceData);
} else {
while (!IsListEmpty (&MnpServiceData->ChildrenList)) {
//
// Don't use NetListRemoveHead here, the remove opreration will be done
// in ServiceBindingDestroyChild.
//
Instance = NET_LIST_HEAD (
&MnpServiceData->ChildrenList,
MNP_INSTANCE_DATA,
InstEntry
);
ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);
}
}
return Status;
}
/**
Creates a child handle with a set of I/O services.
@param This Protocol instance pointer.
@param ChildHandle Pointer to the handle of the child to create. If
it is NULL, then a new handle is created. If it is
not NULL, then the I/O services are added to the
existing child handle.
@retval EFI_SUCCES The child handle was created with the I/O
services.
@retval EFI_OUT_OF_RESOURCES There are not enough resources availabe to create
the child.
@retval other The child handle was not created.
**/
EFI_STATUS
EFIAPI
MnpServiceBindingCreateChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN EFI_HANDLE *ChildHandle
)
{
EFI_STATUS Status;
MNP_SERVICE_DATA *MnpServiceData;
MNP_INSTANCE_DATA *Instance;
VOID *Snp;
EFI_TPL OldTpl;
if ((This == NULL) || (ChildHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
MnpServiceData = MNP_SERVICE_DATA_FROM_THIS (This);
//
// Allocate buffer for the new instance.
//
Instance = AllocateZeroPool (sizeof (MNP_INSTANCE_DATA));
if (Instance == NULL) {
DEBUG ((EFI_D_ERROR, "MnpServiceBindingCreateChild: Faild to allocate memory for the new instance.\n"));
return EFI_OUT_OF_RESOURCES;
}
//
// Init the instance data.
//
MnpInitializeInstanceData (MnpServiceData, Instance);
Status = gBS->InstallMultipleProtocolInterfaces (
ChildHandle,
&gEfiManagedNetworkProtocolGuid,
&Instance->ManagedNetwork,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG (
(EFI_D_ERROR,
"MnpServiceBindingCreateChild: Failed to install the MNP protocol, %r.\n",
Status)
);
goto ErrorExit;
}
//
// Save the instance's childhandle.
//
Instance->Handle = *ChildHandle;
Status = gBS->OpenProtocol (
MnpServiceData->ControllerHandle,
&gEfiSimpleNetworkProtocolGuid,
(VOID **) &Snp,
gMnpDriverBinding.DriverBindingHandle,
Instance->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
//
// Add the child instance into ChildrenList.
//
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
InsertTailList (&MnpServiceData->ChildrenList, &Instance->InstEntry);
MnpServiceData->ChildrenNumber++;
gBS->RestoreTPL (OldTpl);
ErrorExit:
if (EFI_ERROR (Status)) {
if (Instance->Handle != NULL) {
gBS->UninstallMultipleProtocolInterfaces (
&gEfiManagedNetworkProtocolGuid,
&Instance->ManagedNetwork,
NULL
);
}
gBS->FreePool (Instance);
}
return Status;
}
/**
Destroys a child handle with a set of I/O services.
@param This Protocol instance pointer.
@param ChildHandle Handle of the child to destroy.
@retval EFI_SUCCES The I/O services were removed from the child
handle.
@retval EFI_UNSUPPORTED The child handle does not support the I/O services
that are being removed.
@retval EFI_INVALID_PARAMETER Child handle is not a valid EFI Handle.
@retval EFI_ACCESS_DENIED The child handle could not be destroyed because
its I/O services are being used.
@retval other The child handle was not destroyed.
**/
EFI_STATUS
EFIAPI
MnpServiceBindingDestroyChild (
IN EFI_SERVICE_BINDING_PROTOCOL *This,
IN EFI_HANDLE ChildHandle
)
{
EFI_STATUS Status;
MNP_SERVICE_DATA *MnpServiceData;
EFI_MANAGED_NETWORK_PROTOCOL *ManagedNetwork;
MNP_INSTANCE_DATA *Instance;
EFI_TPL OldTpl;
if ((This == NULL) || (ChildHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
MnpServiceData = MNP_SERVICE_DATA_FROM_THIS (This);
//
// Try to retrieve ManagedNetwork Protocol from ChildHandle.
//
Status = gBS->OpenProtocol (
ChildHandle,
&gEfiManagedNetworkProtocolGuid,
(VOID **) &ManagedNetwork,
gMnpDriverBinding.DriverBindingHandle,
ChildHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
Instance = MNP_INSTANCE_DATA_FROM_THIS (ManagedNetwork);
//
// MnpServiceBindingDestroyChild may be called twice: first called by
// MnpServiceBindingStop, second called by uninstalling the MNP protocol
// in this ChildHandle. Use destroyed to make sure the resource clean code
// will only excecute once.
//
if (Instance->Destroyed) {
return EFI_SUCCESS;
}
Instance->Destroyed = TRUE;
//
// Close the Simple Network protocol.
//
gBS->CloseProtocol (
MnpServiceData->ControllerHandle,
&gEfiSimpleNetworkProtocolGuid,
gMnpDriverBinding.DriverBindingHandle,
ChildHandle
);
//
// Uninstall the ManagedNetwork protocol.
//
Status = gBS->UninstallMultipleProtocolInterfaces (
ChildHandle,
&gEfiManagedNetworkProtocolGuid,
&Instance->ManagedNetwork,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG (
(EFI_D_ERROR,
"MnpServiceBindingDestroyChild: Failed to uninstall the ManagedNetwork protocol, %r.\n",
Status)
);
Instance->Destroyed = FALSE;
return Status;
}
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
//
// Reset the configuration.
//
ManagedNetwork->Configure (ManagedNetwork, NULL);
//
// Try to flush the RcvdPacketQueue.
//
MnpFlushRcvdDataQueue (Instance);
//
// Clean the RxTokenMap.
//
NetMapClean (&Instance->RxTokenMap);
//
// Remove this instance from the ChildrenList.
//
RemoveEntryList (&Instance->InstEntry);
MnpServiceData->ChildrenNumber--;
gBS->RestoreTPL (OldTpl);
gBS->FreePool (Instance);
return Status;
}
/**
The entry point for Mnp driver which installs the driver binding and component
name protocol on its ImageHandle.
@param ImageHandle The image handle of the driver.
@param SystemTable The system table.
@retval EFI_SUCCES the driver binding and component name protocols are
successfully installed.
@retval other failed.
**/
EFI_STATUS
EFIAPI
MnpDriverEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gMnpDriverBinding,
ImageHandle,
&gMnpComponentName,
&gMnpComponentName2
);
}