1 files changed, 82 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/VBoxPkg/E1kNetDxe/Events.c b/src/VBox/Devices/EFI/Firmware/VBoxPkg/E1kNetDxe/Events.c
new file mode 100644
index 00000000..e51aee58
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/VBoxPkg/E1kNetDxe/Events.c
@@ -0,0 +1,82 @@
+/** @file
+
+  Implements
+  - the SNM.WaitForPacket EVT_NOTIFY_WAIT event,
+  - the EVT_SIGNAL_EXIT_BOOT_SERVICES event
+  for the e1000 driver.
+
+  Copyright (c) 2021, Oracle and/or its affiliates.
+  Copyright (C) 2013, Red Hat, Inc.
+  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include "E1kNet.h"
+
+/**
+  Invoke a notification event
+
+  @param  Event                 Event whose notification function is being
+                                invoked.
+  @param  Context               The pointer to the notification function's
+                                context, which is implementation-dependent.
+
+**/
+
+VOID
+EFIAPI
+E1kNetIsPacketAvailable (
+  IN  EFI_EVENT Event,
+  IN  VOID      *Context
+  )
+{
+  //
+  // This callback has been enqueued by an external application and is
+  // running at TPL_CALLBACK already.
+  //
+  // The WaitForPacket logic is similar to that of WaitForKey. The former has
+  // almost no documentation in either the UEFI-2.3.1+errC spec or the
+  // DWG-2.3.1, but WaitForKey does have some.
+  //
+  E1K_NET_DEV *Dev;
+  UINT32      RdhCur;
+
+  Dev = Context;
+  if (Dev->Snm.State != EfiSimpleNetworkInitialized) {
+    return;
+  }
+
+  E1kNetRegRead32(Dev, E1K_REG_RDH, &RdhCur);
+
+  if (Dev->RdhLastSeen != RdhCur) {
+    gBS->SignalEvent (Dev->Snp.WaitForPacket);
+  }
+}
+
+VOID
+EFIAPI
+E1kNetExitBoot (
+  IN  EFI_EVENT Event,
+  IN  VOID      *Context
+  )
+{
+  //
+  // This callback has been enqueued by ExitBootServices() and is running at
+  // TPL_CALLBACK already.
+  //
+  // Shut down pending transfers according to DWG-2.3.1, "25.5.1 Exit Boot
+  // Services Event".
+  //
+  E1K_NET_DEV *Dev;
+
+  DEBUG ((DEBUG_VERBOSE, "%a: Context=0x%p\n", __FUNCTION__, Context));
+  Dev = Context;
+  if (Dev->Snm.State == EfiSimpleNetworkInitialized) {
+    E1kNetDevReset (Dev);
+  }
+}