system76-edk2/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c

/** @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
           );
}