/*++ | |
Copyright (c) 2006, Intel Corporation | |
All rights reserved. This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
Module name: | |
WaitForPacket.c | |
Abstract: | |
Event handler to check for available packet. | |
--*/ | |
#include "Snp.h" | |
VOID | |
EFIAPI | |
SnpWaitForPacketNotify ( | |
EFI_EVENT Event, | |
VOID *SnpPtr | |
) | |
/*++ | |
Routine Description: | |
Arguments: | |
Returns: | |
--*/ | |
{ | |
PXE_DB_GET_STATUS PxeDbGetStatus; | |
// | |
// Do nothing if either parameter is a NULL pointer. | |
// | |
if (Event == NULL || SnpPtr == NULL) { | |
return ; | |
} | |
// | |
// Do nothing if the SNP interface is not initialized. | |
// | |
switch (((SNP_DRIVER *) SnpPtr)->mode.State) { | |
case EfiSimpleNetworkInitialized: | |
break; | |
case EfiSimpleNetworkStopped: | |
case EfiSimpleNetworkStarted: | |
default: | |
return ; | |
} | |
// | |
// Fill in CDB for UNDI GetStatus(). | |
// | |
((SNP_DRIVER *) SnpPtr)->cdb.OpCode = PXE_OPCODE_GET_STATUS; | |
((SNP_DRIVER *) SnpPtr)->cdb.OpFlags = 0; | |
((SNP_DRIVER *) SnpPtr)->cdb.CPBsize = PXE_CPBSIZE_NOT_USED; | |
((SNP_DRIVER *) SnpPtr)->cdb.CPBaddr = PXE_CPBADDR_NOT_USED; | |
((SNP_DRIVER *) SnpPtr)->cdb.DBsize = sizeof (UINT32) * 2; | |
((SNP_DRIVER *) SnpPtr)->cdb.DBaddr = (UINT64) (UINTN) (((SNP_DRIVER *) SnpPtr)->db); | |
((SNP_DRIVER *) SnpPtr)->cdb.StatCode = PXE_STATCODE_INITIALIZE; | |
((SNP_DRIVER *) SnpPtr)->cdb.StatFlags = PXE_STATFLAGS_INITIALIZE; | |
((SNP_DRIVER *) SnpPtr)->cdb.IFnum = ((SNP_DRIVER *) SnpPtr)->if_num; | |
((SNP_DRIVER *) SnpPtr)->cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST; | |
// | |
// Clear contents of DB buffer. | |
// | |
ZeroMem (((SNP_DRIVER *) SnpPtr)->db, sizeof (UINT32) * 2); | |
// | |
// Issue UNDI command and check result. | |
// | |
(*((SNP_DRIVER *) SnpPtr)->issue_undi32_command) ((UINT64) (UINTN) &((SNP_DRIVER *) SnpPtr)->cdb); | |
if (((SNP_DRIVER *) SnpPtr)->cdb.StatCode != EFI_SUCCESS) { | |
return ; | |
} | |
// | |
// We might have a packet. Check the receive length and signal | |
// the event if the length is not zero. | |
// | |
CopyMem ( | |
&PxeDbGetStatus, | |
((SNP_DRIVER *) SnpPtr)->db, | |
sizeof (UINT32) * 2 | |
); | |
if (PxeDbGetStatus.RxFrameLen != 0) { | |
gBS->SignalEvent (Event); | |
} | |
} | |
/* eof - WaitForPacket.c */ |