acrn-hypervisor/devicemodel/include/virtio_kernel.h

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/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
/* This file provides common routines to interface with VBS-K kernel modules */
#ifndef _VIRTIO_KERNEL_H_
#define _VIRTIO_KERNEL_H_
#include "vbs_common_if.h" /* data format between VBS-U & VBS-K */
/**
* @brief APIs for virtio backend in kernel module
*
* @addtogroup acrn_virtio
* @{
*/
enum VBS_K_STATUS {
VIRTIO_DEV_INITIAL = 1, /* initial status */
VIRTIO_DEV_PRE_INIT, /* detected thru cmdline option */
VIRTIO_DEV_INIT_FAILED, /* init failed */
VIRTIO_DEV_INIT_SUCCESS, /* init success */
VIRTIO_DEV_START_FAILED, /* start failed */
VIRTIO_DEV_STARTED, /* start success */
};
/* Return codes */
#define VIRTIO_SUCCESS 0
#define VIRTIO_ERROR_REENTER 1
#define VIRTIO_ERROR_FD_OPEN_FAILED 2
#define VIRTIO_ERROR_MEM_ALLOC_FAILED 3
#define VIRTIO_ERROR_START 4
#define VIRTIO_ERROR_GENERAL 5
/* VBS-K common ops */
/**
* @brief Virtio kernel module reset.
*
* @param fd File descriptor representing virtio backend in kernel module.
*
* @return 0 on OK and non-zero on error.
*/
int vbs_kernel_reset(int fd);
/**
* @brief Virtio kernel module start.
*
* @param fd File descriptor representing virtio backend in kernel module.
* @param dev Pointer to struct vbs_dev_info.
* @param vqs Pointer to struct vbs_vqs_info.
*
* @return 0 on OK and non-zero on error.
*/
int vbs_kernel_start(int fd, struct vbs_dev_info *dev,
struct vbs_vqs_info *vqs);
/**
* @brief Virtio kernel module stop.
*
* @param fd File descriptor representing virtio backend in kernel module.
*
* @return 0 on OK and non-zero on error.
*/
int vbs_kernel_stop(int fd);
/**
* @}
*/
#endif