OvmfPkg/PvScsiDxe: Install DriverBinding protocol

In order to probe and connect to the PvScsi device we need this
protocol. Currently it does nothing.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-3-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>

OvmfPkg/PvScsiDxe/PvScsi.c

@@ -9,8 +9,65 @@
 
 **/
 
+#include <Library/UefiLib.h>
 #include <Uefi/UefiSpec.h>
 
+//
+// Higher versions will be used before lower, 0x10-0xffffffef is the version
+// range for IHV (Indie Hardware Vendors)
+//
+#define PVSCSI_BINDING_VERSION      0x10
+
+//
+// Driver Binding
+//
+
+STATIC
+EFI_STATUS
+EFIAPI
+PvScsiDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL *This,
+  IN EFI_HANDLE                  ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL    *RemainingDevicePath OPTIONAL
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+STATIC
+EFI_STATUS
+EFIAPI
+PvScsiDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL *This,
+  IN EFI_HANDLE                  ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL    *RemainingDevicePath OPTIONAL
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+STATIC
+EFI_STATUS
+EFIAPI
+PvScsiDriverBindingStop (
+  IN EFI_DRIVER_BINDING_PROTOCOL *This,
+  IN EFI_HANDLE                  ControllerHandle,
+  IN UINTN                       NumberOfChildren,
+  IN EFI_HANDLE                  *ChildHandleBuffer
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+STATIC EFI_DRIVER_BINDING_PROTOCOL mPvScsiDriverBinding = {
+  &PvScsiDriverBindingSupported,
+  &PvScsiDriverBindingStart,
+  &PvScsiDriverBindingStop,
+  PVSCSI_BINDING_VERSION,
+  NULL, // ImageHandle, filled by EfiLibInstallDriverBindingComponentName2()
+  NULL  // DriverBindingHandle, filled as well
+};
+
 //
 // Entry Point
 //
@@ -22,5 +79,12 @@ PvScsiEntryPoint (
   IN EFI_SYSTEM_TABLE *SystemTable
   )
 {
-  return EFI_UNSUPPORTED;
+  return EfiLibInstallDriverBindingComponentName2 (
+           ImageHandle,
+           SystemTable,
+           &mPvScsiDriverBinding,
+           ImageHandle,
+           NULL, // TODO Component name
+           NULL  // TODO Component name
+           );
 }

OvmfPkg/PvScsiDxe/PvScsiDxe.inf

@@ -25,3 +25,4 @@
 
 [LibraryClasses]
   UefiDriverEntryPoint
+  UefiLib