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+/** @file
+ * PDM - Pluggable Device Manager, Async I/O Completion.
+ */
+
+/*
+ * Copyright (C) 2007-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that 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, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_vmm_pdmasynccompletion_h
+#define VBOX_INCLUDED_vmm_pdmasynccompletion_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <VBox/types.h>
+#include <iprt/sg.h>
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_pdm_async_completion The PDM Async I/O Completion API
+ * @ingroup grp_pdm
+ * @{
+ */
+
+/** Pointer to a PDM async completion template handle. */
+typedef struct PDMASYNCCOMPLETIONTEMPLATE *PPDMASYNCCOMPLETIONTEMPLATE;
+/** Pointer to a PDM async completion template handle pointer. */
+typedef PPDMASYNCCOMPLETIONTEMPLATE *PPPDMASYNCCOMPLETIONTEMPLATE;
+
+/** Pointer to a PDM async completion task handle. */
+typedef struct PDMASYNCCOMPLETIONTASK *PPDMASYNCCOMPLETIONTASK;
+/** Pointer to a PDM async completion task handle pointer. */
+typedef PPDMASYNCCOMPLETIONTASK *PPPDMASYNCCOMPLETIONTASK;
+
+/** Pointer to a PDM async completion endpoint handle. */
+typedef struct PDMASYNCCOMPLETIONENDPOINT *PPDMASYNCCOMPLETIONENDPOINT;
+/** Pointer to a PDM async completion endpoint handle pointer. */
+typedef PPDMASYNCCOMPLETIONENDPOINT *PPPDMASYNCCOMPLETIONENDPOINT;
+
+
+/**
+ * Completion callback for devices.
+ *
+ * @param pDevIns The device instance.
+ * @param pvUser User argument.
+ * @param rc The status code of the completed request.
+ */
+typedef DECLCALLBACKTYPE(void, FNPDMASYNCCOMPLETEDEV,(PPDMDEVINS pDevIns, void *pvUser, int rc));
+/** Pointer to a FNPDMASYNCCOMPLETEDEV(). */
+typedef FNPDMASYNCCOMPLETEDEV *PFNPDMASYNCCOMPLETEDEV;
+
+
+/**
+ * Completion callback for drivers.
+ *
+ * @param pDrvIns The driver instance.
+ * @param pvTemplateUser User argument given when creating the template.
+ * @param pvUser User argument given during request initiation.
+ * @param rc The status code of the completed request.
+ */
+typedef DECLCALLBACKTYPE(void, FNPDMASYNCCOMPLETEDRV,(PPDMDRVINS pDrvIns, void *pvTemplateUser, void *pvUser, int rc));
+/** Pointer to a FNPDMASYNCCOMPLETEDRV(). */
+typedef FNPDMASYNCCOMPLETEDRV *PFNPDMASYNCCOMPLETEDRV;
+
+
+/**
+ * Completion callback for USB devices.
+ *
+ * @param pUsbIns The USB device instance.
+ * @param pvUser User argument.
+ * @param rc The status code of the completed request.
+ */
+typedef DECLCALLBACKTYPE(void, FNPDMASYNCCOMPLETEUSB,(PPDMUSBINS pUsbIns, void *pvUser, int rc));
+/** Pointer to a FNPDMASYNCCOMPLETEUSB(). */
+typedef FNPDMASYNCCOMPLETEUSB *PFNPDMASYNCCOMPLETEUSB;
+
+
+/**
+ * Completion callback for internal.
+ *
+ * @param pVM The cross context VM structure.
+ * @param pvUser User argument for the task.
+ * @param pvUser2 User argument for the template.
+ * @param rc The status code of the completed request.
+ */
+typedef DECLCALLBACKTYPE(void, FNPDMASYNCCOMPLETEINT,(PVM pVM, void *pvUser, void *pvUser2, int rc));
+/** Pointer to a FNPDMASYNCCOMPLETEINT(). */
+typedef FNPDMASYNCCOMPLETEINT *PFNPDMASYNCCOMPLETEINT;
+
+VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateInternal(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate,
+ PFNPDMASYNCCOMPLETEINT pfnCompleted, void *pvUser2, const char *pszDesc);
+VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroy(PPDMASYNCCOMPLETIONTEMPLATE pTemplate);
+VMMR3DECL(int) PDMR3AsyncCompletionEpCreateForFile(PPPDMASYNCCOMPLETIONENDPOINT ppEndpoint,
+ const char *pszFilename, uint32_t fFlags,
+ PPDMASYNCCOMPLETIONTEMPLATE pTemplate);
+
+/** @defgroup grp_pdmacep_file_flags Flags for PDMR3AsyncCompletionEpCreateForFile
+ * @{ */
+/** Open the file in read-only mode. */
+#define PDMACEP_FILE_FLAGS_READ_ONLY RT_BIT_32(0)
+/** Whether the file should not be write protected.
+ * The default is to protect the file against writes by other processes
+ * when opened in read/write mode to prevent data corruption by
+ * concurrent access which can occur if the local writeback cache is enabled.
+ */
+#define PDMACEP_FILE_FLAGS_DONT_LOCK RT_BIT_32(2)
+/** Open the endpoint with the host cache enabled. */
+#define PDMACEP_FILE_FLAGS_HOST_CACHE_ENABLED RT_BIT_32(3)
+/** @} */
+
+VMMR3DECL(void) PDMR3AsyncCompletionEpClose(PPDMASYNCCOMPLETIONENDPOINT pEndpoint);
+VMMR3DECL(int) PDMR3AsyncCompletionEpRead(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
+ PCRTSGSEG paSegments, unsigned cSegments,
+ size_t cbRead, void *pvUser,
+ PPPDMASYNCCOMPLETIONTASK ppTask);
+VMMR3DECL(int) PDMR3AsyncCompletionEpWrite(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
+ PCRTSGSEG paSegments, unsigned cSegments,
+ size_t cbWrite, void *pvUser,
+ PPPDMASYNCCOMPLETIONTASK ppTask);
+VMMR3DECL(int) PDMR3AsyncCompletionEpFlush(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, void *pvUser, PPPDMASYNCCOMPLETIONTASK ppTask);
+VMMR3DECL(int) PDMR3AsyncCompletionEpGetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint64_t *pcbSize);
+VMMR3DECL(int) PDMR3AsyncCompletionEpSetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, uint64_t cbSize);
+VMMR3DECL(int) PDMR3AsyncCompletionEpSetBwMgr(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, const char *pszBwMgr);
+VMMR3DECL(int) PDMR3AsyncCompletionTaskCancel(PPDMASYNCCOMPLETIONTASK pTask);
+VMMR3DECL(int) PDMR3AsyncCompletionBwMgrSetMaxForFile(PUVM pUVM, const char *pszBwMgr, uint32_t cbMaxNew);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_vmm_pdmasynccompletion_h */
+