/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _VIRTIO_USER_DEV_H
#define _VIRTIO_USER_DEV_H

#include <limits.h>
#include "../virtio_pci.h"
#include "../virtio_ring.h"
#include "vhost.h"

struct virtio_user_dev {
	/* for vhost_user backend */
	int		vhostfd;

	/* for vhost_kernel backend */
	char		*ifname;
	int		*vhostfds;
	int		*tapfds;

	/* for both vhost_user and vhost_kernel */
	int		callfds[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
	int		kickfds[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
	int		mac_specified;
	uint32_t	max_queue_pairs;
	uint32_t	queue_pairs;
	uint32_t	queue_size;
	uint64_t	features; /* the negotiated features with driver,
				   * and will be sync with device
				   */
	uint64_t	device_features; /* supported features by device */
	uint8_t		status;
	uint8_t		mac_addr[ETHER_ADDR_LEN];
	char		path[PATH_MAX];
	struct vring	vrings[VIRTIO_MAX_VIRTQUEUES * 2 + 1];
	struct virtio_user_backend_ops *ops;
};

int virtio_user_start_device(struct virtio_user_dev *dev);
int virtio_user_stop_device(struct virtio_user_dev *dev);
int virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
			 int cq, int queue_size, const char *mac);
void virtio_user_dev_uninit(struct virtio_user_dev *dev);
void virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t queue_idx);
#endif