diff options
Diffstat (limited to 'OvmfPkg/VirtioFsDxe/DriverBinding.c')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/DriverBinding.c | 94 |
1 files changed, 91 insertions, 3 deletions
diff --git a/OvmfPkg/VirtioFsDxe/DriverBinding.c b/OvmfPkg/VirtioFsDxe/DriverBinding.c index ac0a6330f0..65e45b5c4b 100644 --- a/OvmfPkg/VirtioFsDxe/DriverBinding.c +++ b/OvmfPkg/VirtioFsDxe/DriverBinding.c @@ -6,11 +6,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
**/
+#include <IndustryStandard/Virtio.h> // VIRTIO_SUBSYSTEM_FILESYSTEM
#include <Library/BaseLib.h> // AsciiStrCmp()
+#include <Library/MemoryAllocationLib.h> // AllocatePool()
#include <Library/UefiBootServicesTableLib.h> // gBS
#include <Protocol/ComponentName2.h> // EFI_COMPONENT_NAME2_PROTOCOL
#include <Protocol/DriverBinding.h> // EFI_DRIVER_BINDING_PROTOCOL
+#include "VirtioFsDxe.h"
+
//
// UEFI Driver Model protocol instances.
//
@@ -28,7 +32,27 @@ VirtioFsBindingSupported ( IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
- return EFI_UNSUPPORTED;
+ EFI_STATUS Status;
+ VIRTIO_DEVICE_PROTOCOL *Virtio;
+ EFI_STATUS CloseStatus;
+
+ Status = gBS->OpenProtocol (ControllerHandle, &gVirtioDeviceProtocolGuid,
+ (VOID **)&Virtio, This->DriverBindingHandle,
+ ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (Virtio->SubSystemDeviceId != VIRTIO_SUBSYSTEM_FILESYSTEM) {
+ Status = EFI_UNSUPPORTED;
+ }
+
+ CloseStatus = gBS->CloseProtocol (ControllerHandle,
+ &gVirtioDeviceProtocolGuid, This->DriverBindingHandle,
+ ControllerHandle);
+ ASSERT_EFI_ERROR (CloseStatus);
+
+ return Status;
}
EFI_STATUS
@@ -39,7 +63,45 @@ VirtioFsBindingStart ( IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
- return EFI_DEVICE_ERROR;
+ VIRTIO_FS *VirtioFs;
+ EFI_STATUS Status;
+ EFI_STATUS CloseStatus;
+
+ VirtioFs = AllocatePool (sizeof *VirtioFs);
+ if (VirtioFs == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ VirtioFs->Signature = VIRTIO_FS_SIG;
+
+ Status = gBS->OpenProtocol (ControllerHandle, &gVirtioDeviceProtocolGuid,
+ (VOID **)&VirtioFs->Virtio, This->DriverBindingHandle,
+ ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER);
+ if (EFI_ERROR (Status)) {
+ goto FreeVirtioFs;
+ }
+
+ VirtioFs->SimpleFs.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
+ VirtioFs->SimpleFs.OpenVolume = VirtioFsOpenVolume;
+
+ Status = gBS->InstallProtocolInterface (&ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid, EFI_NATIVE_INTERFACE,
+ &VirtioFs->SimpleFs);
+ if (EFI_ERROR (Status)) {
+ goto CloseVirtio;
+ }
+
+ return EFI_SUCCESS;
+
+CloseVirtio:
+ CloseStatus = gBS->CloseProtocol (ControllerHandle,
+ &gVirtioDeviceProtocolGuid, This->DriverBindingHandle,
+ ControllerHandle);
+ ASSERT_EFI_ERROR (CloseStatus);
+
+FreeVirtioFs:
+ FreePool (VirtioFs);
+
+ return Status;
}
EFI_STATUS
@@ -51,7 +113,33 @@ VirtioFsBindingStop ( IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
)
{
- return EFI_DEVICE_ERROR;
+ EFI_STATUS Status;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFs;
+ VIRTIO_FS *VirtioFs;
+
+ Status = gBS->OpenProtocol (ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid, (VOID **)&SimpleFs,
+ This->DriverBindingHandle, ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ VirtioFs = VIRTIO_FS_FROM_SIMPLE_FS (SimpleFs);
+
+ Status = gBS->UninstallProtocolInterface (ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid, SimpleFs);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = gBS->CloseProtocol (ControllerHandle, &gVirtioDeviceProtocolGuid,
+ This->DriverBindingHandle, ControllerHandle);
+ ASSERT_EFI_ERROR (Status);
+
+ FreePool (VirtioFs);
+
+ return EFI_SUCCESS;
}
EFI_STATUS
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