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/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#ifndef _NETVSC_API_H_
#define _NETVSC_API_H_
#include "VmbusApi.h"
/* Defines */
#define NETVSC_DEVICE_RING_BUFFER_SIZE (64*PAGE_SIZE)
#define HW_MACADDR_LEN 6
/* Fwd declaration */
struct hv_netvsc_packet;
/* Represent the xfer page packet which contains 1 or more netvsc packet */
struct xferpage_packet {
struct list_head ListEntry;
/* # of netvsc packets this xfer packet contains */
u32 Count;
};
/* The number of pages which are enough to cover jumbo frame buffer. */
#define NETVSC_PACKET_MAXPAGE 4
/*
* Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
* within the RNDIS
*/
struct hv_netvsc_packet {
/* Bookkeeping stuff */
struct list_head ListEntry;
struct hv_device *Device;
bool IsDataPacket;
/*
* Valid only for receives when we break a xfer page packet
* into multiple netvsc packets
*/
struct xferpage_packet *XferPagePacket;
union {
struct{
u64 ReceiveCompletionTid;
void *ReceiveCompletionContext;
void (*OnReceiveCompletion)(void *context);
} Recv;
struct{
u64 SendCompletionTid;
void *SendCompletionContext;
void (*OnSendCompletion)(void *context);
} Send;
} Completion;
/* This points to the memory after PageBuffers */
void *Extension;
u32 TotalDataBufferLength;
/* Points to the send/receive buffer where the ethernet frame is */
u32 PageBufferCount;
struct hv_page_buffer PageBuffers[NETVSC_PACKET_MAXPAGE];
};
/* Represents the net vsc driver */
struct netvsc_driver {
/* Must be the first field */
/* Which is a bug FIXME! */
struct hv_driver Base;
u32 RingBufferSize;
u32 RequestExtSize;
/* Additional num of page buffers to allocate */
u32 AdditionalRequestPageBufferCount;
/*
* This is set by the caller to allow us to callback when we
* receive a packet from the "wire"
*/
int (*OnReceiveCallback)(struct hv_device *dev,
struct hv_netvsc_packet *packet);
void (*OnLinkStatusChanged)(struct hv_device *dev, u32 Status);
/* Specific to this driver */
int (*OnOpen)(struct hv_device *dev);
int (*OnClose)(struct hv_device *dev);
int (*OnSend)(struct hv_device *dev, struct hv_netvsc_packet *packet);
void *Context;
};
struct netvsc_device_info {
unsigned char MacAddr[6];
bool LinkState; /* 0 - link up, 1 - link down */
};
/* Interface */
int NetVscInitialize(struct hv_driver *drv);
#endif /* _NETVSC_API_H_ */
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