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In a virtual machine, VMCI is exposed as a regular PCI device. The primary communication mechanisms supported are a point-to-point bidirectional transport based on a pair of memory-mapped queues, and asynchronous notifications in the form of datagrams and doorbells. These features are available to kernel level components such as vSockets through the VMCI kernel API. In addition to this, the VMCI kernel API provides support for receiving events related to the state of the VMCI communication channels, and the virtual machine itself. Submitted by: Vishnu Dasa <vdasa@vmware.com> Reviewed by: bcr, imp Obtained from: VMware Differential Revision: https://reviews.freebsd.org/D14289
34 lines
896 B
C
34 lines
896 B
C
/*-
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* Copyright (c) 2018 VMware, Inc. All Rights Reserved.
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*
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* SPDX-License-Identifier: (BSD-2-Clause AND GPL-2.0)
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*
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* $FreeBSD$
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*/
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/* Kernel API (v2) exported from the VMCI guest driver. */
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#ifndef _VMCI_KERNEL_API_2_H_
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#define _VMCI_KERNEL_API_2_H_
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#include "vmci_kernel_api_1.h"
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/* Define version 2. */
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#undef VMCI_KERNEL_API_VERSION
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#define VMCI_KERNEL_API_VERSION_2 2
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#define VMCI_KERNEL_API_VERSION VMCI_KERNEL_API_VERSION_2
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/* VMCI Doorbell API. */
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#define VMCI_FLAG_DELAYED_CB 0x01
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typedef void (*vmci_callback)(void *client_data);
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int vmci_doorbell_create(struct vmci_handle *handle, uint32_t flags,
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vmci_privilege_flags priv_flags, vmci_callback notify_cb,
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void *client_data);
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int vmci_doorbell_destroy(struct vmci_handle handle);
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int vmci_doorbell_notify(struct vmci_handle handle,
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vmci_privilege_flags priv_flags);
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#endif /* !_VMCI_KERNEL_API_2_H_ */
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