Import SnpDxe, Tcp4Dxe, Udp4Dxe and MnpDxe.

[mirror_edk2.git] / MdeModulePkg / Universal / Network / SnpDxe / WaitForPacket.c

diff --git a/MdeModulePkg/Universal/Network/SnpDxe/WaitForPacket.c b/MdeModulePkg/Universal/Network/SnpDxe/WaitForPacket.c
new file mode 100644 (file)
index 0000000..57d82ea
--- /dev/null
+++ b/MdeModulePkg/Universal/Network/SnpDxe/WaitForPacket.c
@@ -0,0 +1,97 @@
+/** @file\r
+Copyright (c) 2004, Intel Corporation\r
+All rights reserved. This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution.  The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+Module name:\r
+  WaitForPacket.c\r
+\r
+Abstract:\r
+  Event handler to check for available packet.\r
+\r
+\r
+**/\r
+\r
+#include "Snp.h"\r
+\r
+\r
+/**\r
+\r
+\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+SnpWaitForPacketNotify (\r
+  EFI_EVENT Event,\r
+  VOID      *SnpPtr\r
+  )\r
+{\r
+  PXE_DB_GET_STATUS PxeDbGetStatus;\r
+\r
+  //\r
+  // Do nothing if either parameter is a NULL pointer.\r
+  //\r
+  if (Event == NULL || SnpPtr == NULL) {\r
+    return ;\r
+  }\r
+  //\r
+  // Do nothing if the SNP interface is not initialized.\r
+  //\r
+  switch (((SNP_DRIVER *) SnpPtr)->mode.State) {\r
+  case EfiSimpleNetworkInitialized:\r
+    break;\r
+\r
+  case EfiSimpleNetworkStopped:\r
+  case EfiSimpleNetworkStarted:\r
+  default:\r
+    return ;\r
+  }\r
+  //\r
+  // Fill in CDB for UNDI GetStatus().\r
+  //\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.OpCode     = PXE_OPCODE_GET_STATUS;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.OpFlags    = 0;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.DBsize     = sizeof (UINT32) * 2;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.DBaddr     = (UINT64)(UINTN) (((SNP_DRIVER *) SnpPtr)->db);\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.StatCode   = PXE_STATCODE_INITIALIZE;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.IFnum      = ((SNP_DRIVER *) SnpPtr)->if_num;\r
+  ((SNP_DRIVER *) SnpPtr)->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;\r
+\r
+  //\r
+  // Clear contents of DB buffer.\r
+  //\r
+  ZeroMem (((SNP_DRIVER *) SnpPtr)->db, sizeof (UINT32) * 2);\r
+\r
+  //\r
+  // Issue UNDI command and check result.\r
+  //\r
+  (*((SNP_DRIVER *) SnpPtr)->issue_undi32_command) ((UINT64)(UINTN) &((SNP_DRIVER *) SnpPtr)->cdb);\r
+\r
+  if (((SNP_DRIVER *) SnpPtr)->cdb.StatCode != EFI_SUCCESS) {\r
+    return ;\r
+  }\r
+  //\r
+  // We might have a packet.  Check the receive length and signal\r
+  // the event if the length is not zero.\r
+  //\r
+  CopyMem (\r
+    &PxeDbGetStatus,\r
+    ((SNP_DRIVER *) SnpPtr)->db,\r
+    sizeof (UINT32) * 2\r
+    );\r
+\r
+  if (PxeDbGetStatus.RxFrameLen != 0) {\r
+    gBS->SignalEvent (Event);\r
+  }\r
+}\r
+\r
+/* eof - WaitForPacket.c */\r