1 files changed, 130 insertions, 0 deletions
diff --git a/roms/edk2/NetworkPkg/SnpDxe/Reset.c b/roms/edk2/NetworkPkg/SnpDxe/Reset.c
new file mode 100644
index 000000000..3069bfde6
--- /dev/null
+++ b/roms/edk2/NetworkPkg/SnpDxe/Reset.c
@@ -0,0 +1,130 @@
+/** @file
+    Implementation of resetting a network adapter.
+
+Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "Snp.h"
+
+
+/**
+  Call UNDI to reset the NIC.
+
+  @param  Snp                 Pointer to the snp driver structure.
+
+  @return EFI_SUCCESSFUL      The NIC was reset.
+  @retval EFI_DEVICE_ERROR    The NIC cannot be reset.
+
+**/
+EFI_STATUS
+PxeReset (
+  SNP_DRIVER *Snp
+  )
+{
+  Snp->Cdb.OpCode     = PXE_OPCODE_RESET;
+  Snp->Cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
+  Snp->Cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
+  Snp->Cdb.DBsize     = PXE_DBSIZE_NOT_USED;
+  Snp->Cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
+  Snp->Cdb.DBaddr     = PXE_DBADDR_NOT_USED;
+  Snp->Cdb.StatCode   = PXE_STATCODE_INITIALIZE;
+  Snp->Cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
+  Snp->Cdb.IFnum      = Snp->IfNum;
+  Snp->Cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;
+
+  //
+  // Issue UNDI command and check result.
+  //
+  DEBUG ((EFI_D_NET, "\nsnp->undi.reset()  "));
+
+  (*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);
+
+  if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {
+    DEBUG (
+      (EFI_D_WARN,
+      "\nsnp->undi32.reset()  %xh:%xh\n",
+      Snp->Cdb.StatFlags,
+      Snp->Cdb.StatCode)
+      );
+
+    //
+    // UNDI could not be reset. Return UNDI error.
+    //
+    return EFI_DEVICE_ERROR;
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Resets a network adapter and reinitializes it with the parameters that were
+  provided in the previous call to Initialize().
+
+  This function resets a network adapter and reinitializes it with the parameters
+  that were provided in the previous call to Initialize(). The transmit and
+  receive queues are emptied and all pending interrupts are cleared.
+  Receive filters, the station address, the statistics, and the multicast-IP-to-HW
+  MAC addresses are not reset by this call. If the network interface was
+  successfully reset, then EFI_SUCCESS will be returned. If the driver has not
+  been initialized, EFI_DEVICE_ERROR will be returned.
+
+  @param This                 A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
+  @param ExtendedVerification Indicates that the driver may perform a more
+                              exhaustive verification operation of the device
+                              during reset.
+
+  @retval EFI_SUCCESS           The network interface was reset.
+  @retval EFI_NOT_STARTED       The network interface has not been started.
+  @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
+  @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.
+  @retval EFI_UNSUPPORTED       This function is not supported by the network interface.
+
+**/
+EFI_STATUS
+EFIAPI
+SnpUndi32Reset (
+  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
+  IN BOOLEAN                     ExtendedVerification
+  )
+{
+  SNP_DRIVER  *Snp;
+  EFI_TPL     OldTpl;
+  EFI_STATUS  Status;
+
+  //
+  // Resolve Warning 4 unreferenced parameter problem
+  //
+  ExtendedVerification = 0;
+  DEBUG ((EFI_D_WARN, "ExtendedVerification = %d is not implemented!\n", ExtendedVerification));
+
+  if (This == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
+
+  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+  switch (Snp->Mode.State) {
+  case EfiSimpleNetworkInitialized:
+    break;
+
+  case EfiSimpleNetworkStopped:
+    Status = EFI_NOT_STARTED;
+    goto ON_EXIT;
+
+  default:
+    Status = EFI_DEVICE_ERROR;
+    goto ON_EXIT;
+  }
+
+  Status = PxeReset (Snp);
+
+ON_EXIT:
+  gBS->RestoreTPL (OldTpl);
+
+  return Status;
+}