1
/* $Id: pdmasynccompletion.h $ */
3
* PDM - Pluggable Device Manager, Async I/O Completion. (VMM)
7
* Copyright (C) 2007-2009 Oracle Corporation
9
* This file is part of VirtualBox Open Source Edition (OSE), as
10
* available from http://www.virtualbox.org. This file is free software;
11
* you can redistribute it and/or modify it under the terms of the GNU
12
* General Public License (GPL) as published by the Free Software
13
* Foundation, in version 2 as it comes in the "COPYING" file of the
14
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17
* The contents of this file may alternatively be used under the terms
18
* of the Common Development and Distribution License Version 1.0
19
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20
* VirtualBox OSE distribution, in which case the provisions of the
21
* CDDL are applicable instead of those of the GPL.
23
* You may elect to license modified versions of this file under the
24
* terms and conditions of either the GPL or the CDDL or both.
27
#ifndef ___VBox_pdmasynccompletion_h
28
#define ___VBox_pdmasynccompletion_h
30
#include <VBox/types.h>
32
#include <iprt/assert.h>
37
/** @defgroup grp_pdm_async_completion The PDM Async I/O Completion API
42
/** Pointer to a PDM async completion template handle. */
43
typedef struct PDMASYNCCOMPLETIONTEMPLATE *PPDMASYNCCOMPLETIONTEMPLATE;
44
/** Pointer to a PDM async completion template handle pointer. */
45
typedef PPDMASYNCCOMPLETIONTEMPLATE *PPPDMASYNCCOMPLETIONTEMPLATE;
47
/** Pointer to a PDM async completion task handle. */
48
typedef struct PDMASYNCCOMPLETIONTASK *PPDMASYNCCOMPLETIONTASK;
49
/** Pointer to a PDM async completion task handle pointer. */
50
typedef PPDMASYNCCOMPLETIONTASK *PPPDMASYNCCOMPLETIONTASK;
52
/** Pointer to a PDM async completion endpoint handle. */
53
typedef struct PDMASYNCCOMPLETIONENDPOINT *PPDMASYNCCOMPLETIONENDPOINT;
54
/** Pointer to a PDM async completion endpoint handle pointer. */
55
typedef PPDMASYNCCOMPLETIONENDPOINT *PPPDMASYNCCOMPLETIONENDPOINT;
59
* Completion callback for devices.
61
* @param pDevIns The device instance.
62
* @param pvUser User argument.
63
* @param rc The status code of the completed request.
65
typedef DECLCALLBACK(void) FNPDMASYNCCOMPLETEDEV(PPDMDEVINS pDevIns, void *pvUser, int rc);
66
/** Pointer to a FNPDMASYNCCOMPLETEDEV(). */
67
typedef FNPDMASYNCCOMPLETEDEV *PFNPDMASYNCCOMPLETEDEV;
71
* Completion callback for drivers.
73
* @param pDrvIns The driver instance.
74
* @param pvTemplateUser User argument given when creating the template.
75
* @param pvUser User argument given during request initiation.
76
* @param rc The status code of the completed request.
78
typedef DECLCALLBACK(void) FNPDMASYNCCOMPLETEDRV(PPDMDRVINS pDrvIns, void *pvTemplateUser, void *pvUser, int rc);
79
/** Pointer to a FNPDMASYNCCOMPLETEDRV(). */
80
typedef FNPDMASYNCCOMPLETEDRV *PFNPDMASYNCCOMPLETEDRV;
84
* Completion callback for USB devices.
86
* @param pUsbIns The USB device instance.
87
* @param pvUser User argument.
88
* @param rc The status code of the completed request.
90
typedef DECLCALLBACK(void) FNPDMASYNCCOMPLETEUSB(PPDMUSBINS pUsbIns, void *pvUser, int rc);
91
/** Pointer to a FNPDMASYNCCOMPLETEUSB(). */
92
typedef FNPDMASYNCCOMPLETEUSB *PFNPDMASYNCCOMPLETEUSB;
96
* Completion callback for internal.
98
* @param pVM Pointer to the shared VM structure.
99
* @param pvUser User argument for the task.
100
* @param pvUser2 User argument for the template.
101
* @param rc The status code of the completed request.
103
typedef DECLCALLBACK(void) FNPDMASYNCCOMPLETEINT(PVM pVM, void *pvUser, void *pvUser2, int rc);
104
/** Pointer to a FNPDMASYNCCOMPLETEINT(). */
105
typedef FNPDMASYNCCOMPLETEINT *PFNPDMASYNCCOMPLETEINT;
109
* Creates a async completion template for a device instance.
111
* The template is used when creating new completion tasks.
113
* @returns VBox status code.
114
* @param pVM Pointer to the shared VM structure.
115
* @param pDevIns The device instance.
116
* @param ppTemplate Where to store the template pointer on success.
117
* @param pfnCompleted The completion callback routine.
118
* @param pszDesc Description.
120
VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateDevice(PVM pVM, PPDMDEVINS pDevIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEDEV pfnCompleted, const char *pszDesc);
123
* Creates a async completion template for a driver instance.
125
* The template is used when creating new completion tasks.
127
* @returns VBox status code.
128
* @param pVM Pointer to the shared VM structure.
129
* @param pDrvIns The driver instance.
130
* @param ppTemplate Where to store the template pointer on success.
131
* @param pfnCompleted The completion callback routine.
132
* @param pvTemplateUser Template user argument.
133
* @param pszDesc Description.
135
VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEDRV pfnCompleted, void *pvTemplateUser, const char *pszDesc);
138
* Creates a async completion template for a USB device instance.
140
* The template is used when creating new completion tasks.
142
* @returns VBox status code.
143
* @param pVM Pointer to the shared VM structure.
144
* @param pUsbIns The USB device instance.
145
* @param ppTemplate Where to store the template pointer on success.
146
* @param pfnCompleted The completion callback routine.
147
* @param pszDesc Description.
149
VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEUSB pfnCompleted, const char *pszDesc);
152
* Creates a async completion template for internally by the VMM.
154
* The template is used when creating new completion tasks.
156
* @returns VBox status code.
157
* @param pVM Pointer to the shared VM structure.
158
* @param ppTemplate Where to store the template pointer on success.
159
* @param pfnCompleted The completion callback routine.
160
* @param pvUser2 The 2nd user argument for the callback.
161
* @param pszDesc Description.
163
VMMR3DECL(int) PDMR3AsyncCompletionTemplateCreateInternal(PVM pVM, PPPDMASYNCCOMPLETIONTEMPLATE ppTemplate, PFNPDMASYNCCOMPLETEINT pfnCompleted, void *pvUser2, const char *pszDesc);
166
* Destroys the specified async completion template.
168
* @returns VBox status codes:
169
* @retval VINF_SUCCESS on success.
170
* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if the template is still in use.
172
* @param pTemplate The template in question.
174
VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroy(PPDMASYNCCOMPLETIONTEMPLATE pTemplate);
177
* Destroys all the specified async completion templates for the given device instance.
179
* @returns VBox status codes:
180
* @retval VINF_SUCCESS on success.
181
* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
183
* @param pVM Pointer to the shared VM structure.
184
* @param pDevIns The device instance.
186
VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyDevice(PVM pVM, PPDMDEVINS pDevIns);
189
* Destroys all the specified async completion templates for the given driver instance.
191
* @returns VBox status codes:
192
* @retval VINF_SUCCESS on success.
193
* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
195
* @param pVM Pointer to the shared VM structure.
196
* @param pDrvIns The driver instance.
198
VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns);
201
* Destroys all the specified async completion templates for the given USB device instance.
203
* @returns VBox status codes:
204
* @retval VINF_SUCCESS on success.
205
* @retval VERR_PDM_ASYNC_TEMPLATE_BUSY if one or more of the templates are still in use.
207
* @param pVM Pointer to the shared VM structure.
208
* @param pUsbIns The USB device instance.
210
VMMR3DECL(int) PDMR3AsyncCompletionTemplateDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns);
214
* Opens a file as a async completion endpoint.
216
* @returns VBox status code.
217
* @param ppEndpoint Where to store the opaque endpoint handle on success.
218
* @param pszFilename Path to the file which is to be opened. (UTF-8)
219
* @param fFlags Open flags, see grp_pdmacep_file_flags.
220
* @param pTemplate Handle to the completion callback template to use
221
* for this end point.
223
VMMR3DECL(int) PDMR3AsyncCompletionEpCreateForFile(PPPDMASYNCCOMPLETIONENDPOINT ppEndpoint,
224
const char *pszFilename, uint32_t fFlags,
225
PPDMASYNCCOMPLETIONTEMPLATE pTemplate);
227
/** @defgroup grp_pdmacep_file_flags Flags for PDMR3AsyncCompletionEpCreateForFile
229
/** Open the file in read-only mode. */
230
#define PDMACEP_FILE_FLAGS_READ_ONLY RT_BIT_32(0)
231
/** whether file content should be cached by the endpoint. */
232
#define PDMACEP_FILE_FLAGS_CACHING RT_BIT_32(1)
233
/** Whether the file should not be write protected.
234
* The default is to protect the file against writes by other processes
235
* when opened in read/write mode to prevent data corruption by
236
* concurrent access which can occur if the local writeback cache is enabled.
238
#define PDMACEP_FILE_FLAGS_DONT_LOCK RT_BIT_32(2)
242
* Closes a endpoint waiting for any pending tasks to finish.
245
* @param pEndpoint Handle of the endpoint.
247
VMMR3DECL(void) PDMR3AsyncCompletionEpClose(PPDMASYNCCOMPLETIONENDPOINT pEndpoint);
250
* Creates a read task on the given endpoint.
252
* @returns VBox status code.
253
* @param pEndpoint The file endpoint to read from.
254
* @param off Where to start reading from.
255
* @param paSegments Scatter gather list to store the data in.
256
* @param cSegments Number of segments in the list.
257
* @param cbRead The overall number of bytes to read.
258
* @param pvUser Opaque user data returned in the completion callback
259
* upon completion of the task.
260
* @param ppTask Where to store the task handle on success.
262
VMMR3DECL(int) PDMR3AsyncCompletionEpRead(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
263
PCRTSGSEG paSegments, unsigned cSegments,
264
size_t cbRead, void *pvUser,
265
PPPDMASYNCCOMPLETIONTASK ppTask);
268
* Creates a write task on the given endpoint.
270
* @returns VBox status code.
271
* @param pEndpoint The file endpoint to write to.
272
* @param off Where to start writing at.
273
* @param paSegments Scatter gather list of the data to write.
274
* @param cSegments Number of segments in the list.
275
* @param cbWrite The overall number of bytes to write.
276
* @param pvUser Opaque user data returned in the completion callback
277
* upon completion of the task.
278
* @param ppTask Where to store the task handle on success.
280
VMMR3DECL(int) PDMR3AsyncCompletionEpWrite(PPDMASYNCCOMPLETIONENDPOINT pEndpoint, RTFOFF off,
281
PCRTSGSEG paSegments, unsigned cSegments,
282
size_t cbWrite, void *pvUser,
283
PPPDMASYNCCOMPLETIONTASK ppTask);
286
* Creates a flush task on the given endpoint.
288
* Every read and write task initiated before the flush task is
289
* finished upon completion of this task.
291
* @returns VBox status code.
292
* @param pEndpoint The file endpoint to flush.
293
* @param pvUser Opaque user data returned in the completion callback
294
* upon completion of the task.
295
* @param ppTask Where to store the task handle on success.
297
VMMR3DECL(int) PDMR3AsyncCompletionEpFlush(PPDMASYNCCOMPLETIONENDPOINT pEndpoint,
299
PPPDMASYNCCOMPLETIONTASK ppTask);
302
* Queries the size of an endpoint.
303
* Not that some endpoints may not support this and will return an error
304
* (sockets for example).
306
* @returns VBox status code.
307
* @retval VERR_NOT_SUPPORTED if the endpoint does not support this operation.
308
* @param pEndpoint The file endpoint.
309
* @param pcbSize Where to store the size of the endpoint.
311
VMMR3DECL(int) PDMR3AsyncCompletionEpGetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint,
315
* Sets the size of an endpoint.
316
* Not that some endpoints may not support this and will return an error
317
* (sockets for example).
319
* @returns VBox status code.
320
* @retval VERR_NOT_SUPPORTED if the endpoint does not support this operation.
321
* @param pEndpoint The file endpoint.
322
* @param cbSize The size to set.
324
* @note PDMR3AsyncCompletionEpFlush should be called before this operation is executed.
326
VMMR3DECL(int) PDMR3AsyncCompletionEpSetSize(PPDMASYNCCOMPLETIONENDPOINT pEndpoint,
330
* Cancels a async completion task.
332
* If you want to use this method, you have to take great create to make sure
333
* you will never attempt cancel a task which has been completed. Since there is
334
* no reference counting or anything on the task it self, you have to serialize
335
* the cancelation and completion paths such that the aren't racing one another.
337
* @returns VBox status code
338
* @param pTask The Task to cancel.
340
VMMR3DECL(int) PDMR3AsyncCompletionTaskCancel(PPDMASYNCCOMPLETIONTASK pTask);