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/** @file
Provide EFI_SIMPLE_FILE_SYSTEM_PROTOCOL instances on virtio-fs devices.
Copyright (C) 2020, Red Hat, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h> // AsciiStrCmp()
#include <Library/UefiBootServicesTableLib.h> // gBS
#include <Protocol/ComponentName2.h> // EFI_COMPONENT_NAME2_PROTOCOL
#include <Protocol/DriverBinding.h> // EFI_DRIVER_BINDING_PROTOCOL
//
// UEFI Driver Model protocol instances.
//
STATIC EFI_DRIVER_BINDING_PROTOCOL mDriverBinding;
STATIC EFI_COMPONENT_NAME2_PROTOCOL mComponentName2;
//
// UEFI Driver Model protocol member functions.
//
EFI_STATUS
EFIAPI
VirtioFsBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
return EFI_UNSUPPORTED;
}
EFI_STATUS
EFIAPI
VirtioFsBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
return EFI_DEVICE_ERROR;
}
EFI_STATUS
EFIAPI
VirtioFsBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
)
{
return EFI_DEVICE_ERROR;
}
EFI_STATUS
EFIAPI
VirtioFsGetDriverName (
IN EFI_COMPONENT_NAME2_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName
)
{
if (AsciiStrCmp (Language, "en") != 0) {
return EFI_UNSUPPORTED;
}
*DriverName = L"Virtio Filesystem Driver";
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
VirtioFsGetControllerName (
IN EFI_COMPONENT_NAME2_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
)
{
return EFI_UNSUPPORTED;
}
//
// Entry point of this driver.
//
EFI_STATUS
EFIAPI
VirtioFsEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
mDriverBinding.Supported = VirtioFsBindingSupported;
mDriverBinding.Start = VirtioFsBindingStart;
mDriverBinding.Stop = VirtioFsBindingStop;
mDriverBinding.Version = 0x10;
mDriverBinding.ImageHandle = ImageHandle;
mDriverBinding.DriverBindingHandle = ImageHandle;
mComponentName2.GetDriverName = VirtioFsGetDriverName;
mComponentName2.GetControllerName = VirtioFsGetControllerName;
mComponentName2.SupportedLanguages = "en";
Status = gBS->InstallMultipleProtocolInterfaces (&ImageHandle,
&gEfiDriverBindingProtocolGuid, &mDriverBinding,
&gEfiComponentName2ProtocolGuid, &mComponentName2, NULL);
return Status;
}
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