path: root/drivers/net/hyperv/hyperv_net.h

/*
 *
 * Copyright (c) 2011, 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>
 *   K. Y. Srinivasan <kys@microsoft.com>
 *
 */

#ifndef _HYPERV_NET_H
#define _HYPERV_NET_H

#include <linux/list.h>
#include <linux/hyperv.h>

/* Fwd declaration */
struct hv_netvsc_packet;

/* Represent the xfer page packet which contains 1 or more netvsc packet */
struct xferpage_packet {
	struct list_head list_ent;

	/* # of netvsc packets this xfer packet contains */
	u32 count;
};

/*
 * Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
 * within the RNDIS
 */
struct hv_netvsc_packet {
	/* Bookkeeping stuff */
	struct list_head list_ent;

	struct hv_device *device;
	bool is_data_pkt;

	/*
	 * Valid only for receives when we break a xfer page packet
	 * into multiple netvsc packets
	 */
	struct xferpage_packet *xfer_page_pkt;

	union {
		struct {
			u64 recv_completion_tid;
			void *recv_completion_ctx;
			void (*recv_completion)(void *context);
		} recv;
		struct {
			u64 send_completion_tid;
			void *send_completion_ctx;
			void (*send_completion)(void *context);
		} send;
	} completion;

	/* This points to the memory after page_buf */
	void *extension;

	u32 total_data_buflen;
	/* Points to the send/receive buffer where the ethernet frame is */
	void *data;
	u32 page_buf_cnt;
	struct hv_page_buffer page_buf[0];
};

struct netvsc_device_info {
	unsigned char mac_adr[6];
	bool link_state;	/* 0 - link up, 1 - link down */
	int  ring_size;
};

enum rndis_device_state {
	RNDIS_DEV_UNINITIALIZED = 0,
	RNDIS_DEV_INITIALIZING,
	RNDIS_DEV_INITIALIZED,
	RNDIS_DEV_DATAINITIALIZED,
};

struct rndis_device {
	struct netvsc_device *net_dev;

	enum rndis_device_state state;
	bool link_state;
	atomic_t new_req_id;

	spinlock_t request_lock;
	struct list_head req_list;

	unsigned char hw_mac_adr[ETH_ALEN];
};


/* Interface */
int netvsc_device_add(struct hv_device *device, void *additional_info);
int netvsc_device_remove(struct hv_device *device);
int netvsc_send(struct hv_device *device,
		struct hv_netvsc_packet *packet);
void netvsc_linkstatus_callback(struct hv_device *device_obj,
				unsigned int status);
int netvsc_recv_callback(struct hv_device *device_obj,
			struct hv_netvsc_packet *packet);
int rndis_filter_open(struct hv_device *dev);
int rndis_filter_close(struct hv_device *dev);
int rndis_filter_device_add(struct hv_device *dev,
			void *additional_info);
void rndis_filter_device_remove(struct hv_device *dev);
int rndis_filter_receive(struct hv_device *dev,
			struct hv_netvsc_packet *pkt);



int rndis_filter_send(struct hv_device *dev,
			struct hv_netvsc_packet *pkt);

int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter);


#define NVSP_INVALID_PROTOCOL_VERSION	((u32)0xFFFFFFFF)

#define NVSP_PROTOCOL_VERSION_1		2
#define NVSP_PROTOCOL_VERSION_2		0x30002

enum {
	NVSP_MSG_TYPE_NONE = 0,

	/* Init Messages */
	NVSP_MSG_TYPE_INIT			= 1,
	NVSP_MSG_TYPE_INIT_COMPLETE		= 2,

	NVSP_VERSION_MSG_START			= 100,

	/* Version 1 Messages */
	NVSP_MSG1_TYPE_SEND_NDIS_VER		= NVSP_VERSION_MSG_START,

	NVSP_MSG1_TYPE_SEND_RECV_BUF,
	NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE,
	NVSP_MSG1_TYPE_REVOKE_RECV_BUF,

	NVSP_MSG1_TYPE_SEND_SEND_BUF,