VlanConfigDriver.c

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#include "VlanConfigImpl.h"
 
EFI_DRIVER_BINDING_PROTOCOL  gVlanConfigDriverBinding = {
  VlanConfigDriverBindingSupported,
  VlanConfigDriverBindingStart,
  VlanConfigDriverBindingStop,
  0xa,
  NULL,
  NULL
};
 
EFI_STATUS
EFIAPI
VlanConfigDriverEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  return EfiLibInstallDriverBindingComponentName2 (
           ImageHandle,
           SystemTable,
           &gVlanConfigDriverBinding,
           ImageHandle,
           &gVlanConfigComponentName,
           &gVlanConfigComponentName2
           );
}
 
EFI_STATUS
EFIAPI
VlanConfigDriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
  )
{
  EFI_STATUS                Status;
  EFI_VLAN_CONFIG_PROTOCOL  *VlanConfig;
 
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiVlanConfigProtocolGuid,
                  (VOID **)&VlanConfig,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  //
  // Close the VlanConfig protocol opened for supported test
  //
  gBS->CloseProtocol (
         ControllerHandle,
         &gEfiVlanConfigProtocolGuid,
         This->DriverBindingHandle,
         ControllerHandle
         );
 
  return Status;
}
 
EFI_STATUS
EFIAPI
VlanConfigDriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
  )
{
  EFI_STATUS                Status;
  EFI_VLAN_CONFIG_PROTOCOL  *VlanConfig;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  VLAN_CONFIG_PRIVATE_DATA  *PrivateData;
 
  //
  // Check for multiple start
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiCallerIdGuid,
                  (VOID **)&PrivateData,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (!EFI_ERROR (Status)) {
    return EFI_ALREADY_STARTED;
  }
 
  //
  // Open VlanConfig protocol by driver
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiVlanConfigProtocolGuid,
                  (VOID **)&VlanConfig,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  //
  // Get parent device path
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiDevicePathProtocolGuid,
                  (VOID **)&DevicePath,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    goto ErrorExit;
  }
 
  //
  // Create a private data for this network device
  //
  PrivateData = AllocateCopyPool (sizeof (VLAN_CONFIG_PRIVATE_DATA), &mVlanConfigPrivateDateTemplate);
  if (PrivateData == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ErrorExit;
  }
 
  PrivateData->ImageHandle      = This->DriverBindingHandle;
  PrivateData->ControllerHandle = ControllerHandle;
  PrivateData->VlanConfig       = VlanConfig;
  PrivateData->ParentDevicePath = DevicePath;
 
  //
  // Install VLAN configuration form
  //
  Status = InstallVlanConfigForm (PrivateData);
  if (EFI_ERROR (Status)) {
    goto ErrorExit;
  }
 
  //
  // Install private GUID
  //
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &ControllerHandle,
                  &gEfiCallerIdGuid,
                  PrivateData,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    goto ErrorExit;
  }
 
  return Status;
 
ErrorExit:
  gBS->CloseProtocol (
         ControllerHandle,
         &gEfiVlanConfigProtocolGuid,
         This->DriverBindingHandle,
         ControllerHandle
         );
 
  gBS->CloseProtocol (
         ControllerHandle,
         &gEfiDevicePathProtocolGuid,
         This->DriverBindingHandle,
         ControllerHandle
         );
 
  if (PrivateData != NULL) {
    UninstallVlanConfigForm (PrivateData);
    FreePool (PrivateData);
  }
 
  return Status;
}
 
EFI_STATUS
EFIAPI
VlanConfigDriverBindingStop (
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  IN EFI_HANDLE                   ControllerHandle,
  IN UINTN                        NumberOfChildren,
  IN EFI_HANDLE                   *ChildHandleBuffer
  )
{
  EFI_STATUS                Status;
  VLAN_CONFIG_PRIVATE_DATA  *PrivateData;
 
  //
  // Retrieve the PrivateData from ControllerHandle
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiCallerIdGuid,
                  (VOID **)&PrivateData,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  ASSERT (PrivateData->Signature == VLAN_CONFIG_PRIVATE_DATA_SIGNATURE);
 
  if (NumberOfChildren != 0) {
    if ((NumberOfChildren != 1) || (ChildHandleBuffer[0] != PrivateData->DriverHandle)) {
      return EFI_DEVICE_ERROR;
    }
 
    return UninstallVlanConfigForm (PrivateData);
  }
 
  //
  // Uninstall the private GUID
  //
  Status = gBS->UninstallMultipleProtocolInterfaces (
                  ControllerHandle,
                  &gEfiCallerIdGuid,
                  PrivateData,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
 
  Status = gBS->CloseProtocol (
                  ControllerHandle,
                  &gEfiVlanConfigProtocolGuid,
                  This->DriverBindingHandle,
                  ControllerHandle
                  );
  return Status;
}