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/** @file
* DevPCNet - Private guest interface for the PCNet device. (DEV)
*/
/*
* Copyright (C) 2008 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef ___VBox_DevPCNet_h
#define ___VBox_DevPCNet_h
#include <iprt/types.h>
/** @defgroup grp_devpcnet AMD PCnet-PCI II / PCnet-FAST III (Am79C970A / Am79C973) Ethernet Controller Emulation.
* {
*/
#define PCNET_GUEST_INTERFACE_VERSION (1)
#define PCNET_GUEST_SHARED_MEMORY_SIZE _512K
#define PCNET_GUEST_TX_DESCRIPTOR_SIZE 16
#define PCNET_GUEST_RX_DESCRIPTOR_SIZE 16
#define PCNET_GUEST_MAX_TX_DESCRIPTORS 128
#define PCNET_GUEST_MAX_RX_DESCRIPTORS 256
#define PCNET_GUEST_NIC_BUFFER_SIZE 1536
/* 256*16 + 128*16 + 256*1536 + 128*1536 = 582KB */
/**
* The header of the PCNet shared memory (VBox specific).
*/
#pragma pack(1) /* paranoia */
typedef struct
{
/** The size of the shared memory that's being used.
* (This is <= PCNET_GUEST_SHARED_MEMORY_SIZE.) */
uint32_t cbUsed;
/** Version (PCNET_GUEST_INTERFACE_VERSION). */
uint32_t u32Version;
/** Flags (See PCNET_GUEST_FLAGS_*). */
uint32_t fFlags;
/** Align the following members to 64 bit. */
uint32_t u32Alignment;
union
{
struct
{
/** The size (in bytes) of the transmit descriptor array. */
uint32_t cbTxDescriptors;
/** The size (in bytes) of the receive descriptor array. */
uint32_t cbRxDescriptors;
/** Offset of the transmit descriptors relative to this header. */
uint32_t offTxDescriptors;
/** Offset of the receive descriptors relative to this header. */
uint32_t offRxDescriptors;
/** Offset of the transmit buffers relative to this header. */
uint32_t offTxBuffers;
/** Offset of the receive buffers relative to this header. */
uint32_t offRxBuffers;
} V1;
} V;
} PCNETGUESTSHAREDMEMORY;
#pragma pack()
/** Pointer to the PCNet shared memory header. */
typedef PCNETGUESTSHAREDMEMORY *PPCNETGUESTSHAREDMEMORY;
/** Const pointer to the PCNet shared memory header. */
typedef const PCNETGUESTSHAREDMEMORY *PCPCNETGUESTSHAREDMEMORY;
/** @name fFlags definitions
* @{
*/
/** Host admits existence private PCNet interface. */
#define PCNET_GUEST_FLAGS_ADMIT_HOST RT_BIT(0)
/** Guest admits using the private PCNet interface. */
#define PCNET_GUEST_FLAGS_ADMIT_GUEST RT_BIT(1)
/** @} */
/** @} */
#endif
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