| 1 | /** @file
|
|---|
| 2 | * PDM - Pluggable Device Manager, Block cache.
|
|---|
| 3 | */
|
|---|
| 4 |
|
|---|
| 5 | /*
|
|---|
| 6 | * Copyright (C) 2007-2011 Oracle Corporation
|
|---|
| 7 | *
|
|---|
| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 9 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 10 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 11 | * General Public License (GPL) as published by the Free Software
|
|---|
| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 15 | *
|
|---|
| 16 | * The contents of this file may alternatively be used under the terms
|
|---|
| 17 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 19 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 20 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 21 | *
|
|---|
| 22 | * You may elect to license modified versions of this file under the
|
|---|
| 23 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 24 | */
|
|---|
| 25 |
|
|---|
| 26 | #ifndef ___VBox_vmm_pdmblkcache_h
|
|---|
| 27 | #define ___VBox_vmm_pdmblkcache_h
|
|---|
| 28 |
|
|---|
| 29 | #include <VBox/types.h>
|
|---|
| 30 | #include <VBox/err.h>
|
|---|
| 31 | #include <iprt/assert.h>
|
|---|
| 32 | #include <iprt/sg.h>
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | RT_C_DECLS_BEGIN
|
|---|
| 36 |
|
|---|
| 37 | /** @defgroup grp_pdm_blk_cache The PDM Block Cache API
|
|---|
| 38 | * @ingroup grp_pdm
|
|---|
| 39 | * @{
|
|---|
| 40 | */
|
|---|
| 41 |
|
|---|
| 42 | /** Pointer to a PDM block cache. */
|
|---|
| 43 | typedef struct PDMBLKCACHE *PPDMBLKCACHE;
|
|---|
| 44 | /** Pointer to a PDM block cache pointer. */
|
|---|
| 45 | typedef PPDMBLKCACHE *PPPDMBLKCACHE;
|
|---|
| 46 |
|
|---|
| 47 | /** I/O transfer handle. */
|
|---|
| 48 | typedef struct PDMBLKCACHEIOXFER *PPDMBLKCACHEIOXFER;
|
|---|
| 49 |
|
|---|
| 50 | /**
|
|---|
| 51 | * Block cache I/O request transfer direction.
|
|---|
| 52 | */
|
|---|
| 53 | typedef enum PDMBLKCACHEXFERDIR
|
|---|
| 54 | {
|
|---|
| 55 | /** Read */
|
|---|
| 56 | PDMBLKCACHEXFERDIR_READ = 0,
|
|---|
| 57 | /** Write */
|
|---|
| 58 | PDMBLKCACHEXFERDIR_WRITE,
|
|---|
| 59 | /** Flush */
|
|---|
| 60 | PDMBLKCACHEXFERDIR_FLUSH,
|
|---|
| 61 | /** Discard */
|
|---|
| 62 | PDMBLKCACHEXFERDIR_DISCARD
|
|---|
| 63 | } PDMBLKCACHEXFERDIR;
|
|---|
| 64 |
|
|---|
| 65 | /**
|
|---|
| 66 | * Completion callback for drivers.
|
|---|
| 67 | *
|
|---|
| 68 | * @param pDrvIns The driver instance.
|
|---|
| 69 | * @param pvUser User argument given during request initiation.
|
|---|
| 70 | * @param rc The status code of the completed request.
|
|---|
| 71 | */
|
|---|
| 72 | typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEDRV(PPDMDRVINS pDrvIns, void *pvUser, int rc);
|
|---|
| 73 | /** Pointer to a FNPDMBLKCACHEXFERCOMPLETEDRV(). */
|
|---|
| 74 | typedef FNPDMBLKCACHEXFERCOMPLETEDRV *PFNPDMBLKCACHEXFERCOMPLETEDRV;
|
|---|
| 75 |
|
|---|
| 76 | /**
|
|---|
| 77 | * I/O enqueue callback for drivers.
|
|---|
| 78 | *
|
|---|
| 79 | * @param pDrvIns The driver instance.
|
|---|
| 80 | * @param pvUser User argument given during request initiation.
|
|---|
| 81 | * @param rc The status code of the completed request.
|
|---|
| 82 | */
|
|---|
| 83 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDRV(PPDMDRVINS pDrvIns,
|
|---|
| 84 | PDMBLKCACHEXFERDIR enmXferDir,
|
|---|
| 85 | uint64_t off, size_t cbXfer,
|
|---|
| 86 | PCRTSGBUF pcSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 87 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDRV(). */
|
|---|
| 88 | typedef FNPDMBLKCACHEXFERENQUEUEDRV *PFNPDMBLKCACHEXFERENQUEUEDRV;
|
|---|
| 89 |
|
|---|
| 90 | /**
|
|---|
| 91 | * Discard enqueue callback for drivers.
|
|---|
| 92 | *
|
|---|
| 93 | * @param pDrvIns The driver instance.
|
|---|
| 94 | * @param paRanges Ranges to discard.
|
|---|
| 95 | * @param cRanges Number of range entries.
|
|---|
| 96 | * @param hIoXfer I/O handle to return on completion.
|
|---|
| 97 | */
|
|---|
| 98 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDDRV(PPDMDRVINS pDrvIns,
|
|---|
| 99 | PCRTRANGE paRanges, unsigned cRanges,
|
|---|
| 100 | PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 101 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDDRV(). */
|
|---|
| 102 | typedef FNPDMBLKCACHEXFERENQUEUEDISCARDDRV *PFNPDMBLKCACHEXFERENQUEUEDISCARDDRV;
|
|---|
| 103 |
|
|---|
| 104 | /**
|
|---|
| 105 | * Completion callback for devices.
|
|---|
| 106 | *
|
|---|
| 107 | * @param pDrvIns The device instance.
|
|---|
| 108 | * @param pvUser User argument given during request initiation.
|
|---|
| 109 | * @param rc The status code of the completed request.
|
|---|
| 110 | */
|
|---|
| 111 | typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEDEV(PPDMDEVINS pDevIns, void *pvUser, int rc);
|
|---|
| 112 | /** Pointer to a FNPDMBLKCACHEXFERCOMPLETEDEV(). */
|
|---|
| 113 | typedef FNPDMBLKCACHEXFERCOMPLETEDEV *PFNPDMBLKCACHEXFERCOMPLETEDEV;
|
|---|
| 114 |
|
|---|
| 115 | /**
|
|---|
| 116 | * I/O enqueue callback for devices.
|
|---|
| 117 | *
|
|---|
| 118 | * @param pDevIns The device instance.
|
|---|
| 119 | * @param pvUser User argument given during request initiation.
|
|---|
| 120 | * @param rc The status code of the completed request.
|
|---|
| 121 | */
|
|---|
| 122 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDEV(PPDMDEVINS pDevIns,
|
|---|
| 123 | PDMBLKCACHEXFERDIR enmXferDir,
|
|---|
| 124 | uint64_t off, size_t cbXfer,
|
|---|
| 125 | PCRTSGBUF pcSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 126 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDEV(). */
|
|---|
| 127 | typedef FNPDMBLKCACHEXFERENQUEUEDEV *PFNPDMBLKCACHEXFERENQUEUEDEV;
|
|---|
| 128 |
|
|---|
| 129 | /**
|
|---|
| 130 | * Discard enqueue callback for devices.
|
|---|
| 131 | *
|
|---|
| 132 | * @param pDrvIns The driver instance.
|
|---|
| 133 | * @param paRanges Ranges to discard.
|
|---|
| 134 | * @param cRanges Number of range entries.
|
|---|
| 135 | * @param hIoXfer I/O handle to return on completion.
|
|---|
| 136 | */
|
|---|
| 137 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDDEV(PPDMDEVINS pDevIns,
|
|---|
| 138 | PCRTRANGE paRanges, unsigned cRanges,
|
|---|
| 139 | PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 140 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDDEV(). */
|
|---|
| 141 | typedef FNPDMBLKCACHEXFERENQUEUEDISCARDDEV *PFNPDMBLKCACHEXFERENQUEUEDISCARDDEV;
|
|---|
| 142 |
|
|---|
| 143 | /**
|
|---|
| 144 | * Completion callback for drivers.
|
|---|
| 145 | *
|
|---|
| 146 | * @param pDrvIns The driver instance.
|
|---|
| 147 | * @param pvUser User argument given during request initiation.
|
|---|
| 148 | * @param rc The status code of the completed request.
|
|---|
| 149 | */
|
|---|
| 150 | typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEINT(void *pvUserInt, void *pvUser, int rc);
|
|---|
| 151 | /** Pointer to a FNPDMBLKCACHEXFERCOMPLETEINT(). */
|
|---|
| 152 | typedef FNPDMBLKCACHEXFERCOMPLETEINT *PFNPDMBLKCACHEXFERCOMPLETEINT;
|
|---|
| 153 |
|
|---|
| 154 | /**
|
|---|
| 155 | * I/O enqueue callback for drivers.
|
|---|
| 156 | *
|
|---|
| 157 | * @param pDrvIns The driver instance.
|
|---|
| 158 | * @param pvUser User argument given during request initiation.
|
|---|
| 159 | * @param rc The status code of the completed request.
|
|---|
| 160 | */
|
|---|
| 161 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEINT(void *pvUser,
|
|---|
| 162 | PDMBLKCACHEXFERDIR enmXferDir,
|
|---|
| 163 | uint64_t off, size_t cbXfer,
|
|---|
| 164 | PCRTSGBUF pcSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 165 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEINT(). */
|
|---|
| 166 | typedef FNPDMBLKCACHEXFERENQUEUEINT *PFNPDMBLKCACHEXFERENQUEUEINT;
|
|---|
| 167 |
|
|---|
| 168 | /**
|
|---|
| 169 | * Discard enqueue callback for VMM internal users.
|
|---|
| 170 | *
|
|---|
| 171 | * @param pDrvIns The driver instance.
|
|---|
| 172 | * @param paRanges Ranges to discard.
|
|---|
| 173 | * @param cRanges Number of range entries.
|
|---|
| 174 | * @param hIoXfer I/O handle to return on completion.
|
|---|
| 175 | */
|
|---|
| 176 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDINT(void *pvUser,
|
|---|
| 177 | PCRTRANGE paRanges, unsigned cRanges,
|
|---|
| 178 | PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 179 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDINT(). */
|
|---|
| 180 | typedef FNPDMBLKCACHEXFERENQUEUEDISCARDINT *PFNPDMBLKCACHEXFERENQUEUEDISCARDINT;
|
|---|
| 181 |
|
|---|
| 182 | /**
|
|---|
| 183 | * Completion callback for USB.
|
|---|
| 184 | *
|
|---|
| 185 | * @param pDrvIns The driver instance.
|
|---|
| 186 | * @param pvUser User argument given during request initiation.
|
|---|
| 187 | * @param rc The status code of the completed request.
|
|---|
| 188 | */
|
|---|
| 189 | typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEUSB(PPDMUSBINS pUsbIns, void *pvUser, int rc);
|
|---|
| 190 | /** Pointer to a FNPDMBLKCACHEXFERCOMPLETEUSB(). */
|
|---|
| 191 | typedef FNPDMBLKCACHEXFERCOMPLETEUSB *PFNPDMBLKCACHEXFERCOMPLETEUSB;
|
|---|
| 192 |
|
|---|
| 193 | /**
|
|---|
| 194 | * I/O enqueue callback for drivers.
|
|---|
| 195 | *
|
|---|
| 196 | * @param pDrvIns The driver instance.
|
|---|
| 197 | * @param pvUser User argument given during request initiation.
|
|---|
| 198 | * @param rc The status code of the completed request.
|
|---|
| 199 | */
|
|---|
| 200 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEUSB(PPDMUSBINS pUsbIns,
|
|---|
| 201 | PDMBLKCACHEXFERDIR enmXferDir,
|
|---|
| 202 | uint64_t off, size_t cbXfer,
|
|---|
| 203 | PCRTSGBUF pcSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 204 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEUSB(). */
|
|---|
| 205 | typedef FNPDMBLKCACHEXFERENQUEUEUSB *PFNPDMBLKCACHEXFERENQUEUEUSB;
|
|---|
| 206 |
|
|---|
| 207 | /**
|
|---|
| 208 | * Discard enqueue callback for USB devices.
|
|---|
| 209 | *
|
|---|
| 210 | * @param pUsbIns The USB device instance.
|
|---|
| 211 | * @param paRanges Ranges to discard.
|
|---|
| 212 | * @param cRanges Number of range entries.
|
|---|
| 213 | * @param hIoXfer I/O handle to return on completion.
|
|---|
| 214 | */
|
|---|
| 215 | typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDUSB(PPDMUSBINS pUsbIns,
|
|---|
| 216 | PCRTRANGE paRanges, unsigned cRanges,
|
|---|
| 217 | PPDMBLKCACHEIOXFER hIoXfer);
|
|---|
| 218 | /** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDUSB(). */
|
|---|
| 219 | typedef FNPDMBLKCACHEXFERENQUEUEDISCARDUSB *PFNPDMBLKCACHEXFERENQUEUEDISCARDUSB;
|
|---|
| 220 |
|
|---|
| 221 | /**
|
|---|
| 222 | * Create a block cache user for a driver instance.
|
|---|
| 223 | *
|
|---|
| 224 | * @returns VBox status code.
|
|---|
| 225 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 226 | * @param pDrvIns The driver instance.
|
|---|
| 227 | * @param ppBlkCache Where to store the handle to the block cache.
|
|---|
| 228 | * @param pfnXferComplete The I/O transfer complete callback.
|
|---|
| 229 | * @param pfnXferEnqueue The I/O request enqueue callback.
|
|---|
| 230 | * @param pfnXferEnqueueDiscard The discard request enqueue callback.
|
|---|
| 231 | * @param pcszId Unique ID used to identify the user.
|
|---|
| 232 | */
|
|---|
| 233 | VMMR3DECL(int) PDMR3BlkCacheRetainDriver(PVM pVM, PPDMDRVINS pDrvIns, PPPDMBLKCACHE ppBlkCache,
|
|---|
| 234 | PFNPDMBLKCACHEXFERCOMPLETEDRV pfnXferComplete,
|
|---|
| 235 | PFNPDMBLKCACHEXFERENQUEUEDRV pfnXferEnqueue,
|
|---|
| 236 | PFNPDMBLKCACHEXFERENQUEUEDISCARDDRV pfnXferEnqueueDiscard,
|
|---|
| 237 | const char *pcszId);
|
|---|
| 238 |
|
|---|
| 239 | /**
|
|---|
| 240 | * Create a block cache user for a device instance.
|
|---|
| 241 | *
|
|---|
| 242 | * @returns VBox status code.
|
|---|
| 243 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 244 | * @param pDevIns The device instance.
|
|---|
| 245 | * @param ppBlkCache Where to store the handle to the block cache.
|
|---|
| 246 | * @param pfnXferComplete The I/O transfer complete callback.
|
|---|
| 247 | * @param pfnXferEnqueue The I/O request enqueue callback.
|
|---|
| 248 | * @param pfnXferEnqueueDiscard The discard request enqueue callback.
|
|---|
| 249 | * @param pcszId Unique ID used to identify the user.
|
|---|
| 250 | */
|
|---|
| 251 | VMMR3DECL(int) PDMR3BlkCacheRetainDevice(PVM pVM, PPDMDEVINS pDevIns, PPPDMBLKCACHE ppBlkCache,
|
|---|
| 252 | PFNPDMBLKCACHEXFERCOMPLETEDEV pfnXferComplete,
|
|---|
| 253 | PFNPDMBLKCACHEXFERENQUEUEDEV pfnXferEnqueue,
|
|---|
| 254 | PFNPDMBLKCACHEXFERENQUEUEDISCARDDEV pfnXferEnqueueDiscard,
|
|---|
| 255 | const char *pcszId);
|
|---|
| 256 |
|
|---|
| 257 | /**
|
|---|
| 258 | * Create a block cache user for a USB instance.
|
|---|
| 259 | *
|
|---|
| 260 | * @returns VBox status code.
|
|---|
| 261 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 262 | * @param pUsbIns The USB device instance.
|
|---|
| 263 | * @param ppBlkCache Where to store the handle to the block cache.
|
|---|
| 264 | * @param pfnXferComplete The I/O transfer complete callback.
|
|---|
| 265 | * @param pfnXferEnqueue The I/O request enqueue callback.
|
|---|
| 266 | * @param pfnXferEnqueueDiscard The discard request enqueue callback.
|
|---|
| 267 | * @param pcszId Unique ID used to identify the user.
|
|---|
| 268 | */
|
|---|
| 269 | VMMR3DECL(int) PDMR3BlkCacheRetainUsb(PVM pVM, PPDMUSBINS pUsbIns, PPPDMBLKCACHE ppBlkCache,
|
|---|
| 270 | PFNPDMBLKCACHEXFERCOMPLETEUSB pfnXferComplete,
|
|---|
| 271 | PFNPDMBLKCACHEXFERENQUEUEUSB pfnXferEnqueue,
|
|---|
| 272 | PFNPDMBLKCACHEXFERENQUEUEDISCARDUSB pfnXferEnqueueDiscard,
|
|---|
| 273 | const char *pcszId);
|
|---|
| 274 |
|
|---|
| 275 | /**
|
|---|
| 276 | * Create a block cache user for internal use by VMM.
|
|---|
| 277 | *
|
|---|
| 278 | * @returns VBox status code.
|
|---|
| 279 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 280 | * @param pvUser Opaque user data.
|
|---|
| 281 | * @param ppBlkCache Where to store the handle to the block cache.
|
|---|
| 282 | * @param pfnXferComplete The I/O transfer complete callback.
|
|---|
| 283 | * @param pfnXferEnqueue The I/O request enqueue callback.
|
|---|
| 284 | * @param pfnXferEnqueueDiscard The discard request enqueue callback.
|
|---|
| 285 | * @param pcszId Unique ID used to identify the user.
|
|---|
| 286 | */
|
|---|
| 287 | VMMR3DECL(int) PDMR3BlkCacheRetainInt(PVM pVM, void *pvUser, PPPDMBLKCACHE ppBlkCache,
|
|---|
| 288 | PFNPDMBLKCACHEXFERCOMPLETEINT pfnXferComplete,
|
|---|
| 289 | PFNPDMBLKCACHEXFERENQUEUEINT pfnXferEnqueue,
|
|---|
| 290 | PFNPDMBLKCACHEXFERENQUEUEDISCARDINT pfnXferEnqueueDiscard,
|
|---|
| 291 | const char *pcszId);
|
|---|
| 292 |
|
|---|
| 293 | /**
|
|---|
| 294 | * Releases a block cache handle.
|
|---|
| 295 | *
|
|---|
| 296 | * @returns nothing.
|
|---|
| 297 | * @param pBlkCache Block cache handle.
|
|---|
| 298 | */
|
|---|
| 299 | VMMR3DECL(void) PDMR3BlkCacheRelease(PPDMBLKCACHE pBlkCache);
|
|---|
| 300 |
|
|---|
| 301 | /**
|
|---|
| 302 | * Releases all block cache handles for a device instance.
|
|---|
| 303 | *
|
|---|
| 304 | * @returns nothing.
|
|---|
| 305 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 306 | * @param pDevIns The device instance.
|
|---|
| 307 | */
|
|---|
| 308 | VMMR3DECL(void) PDMR3BlkCacheReleaseDevice(PVM pVM, PPDMDEVINS pDevIns);
|
|---|
| 309 |
|
|---|
| 310 | /**
|
|---|
| 311 | * Releases all block cache handles for a driver instance.
|
|---|
| 312 | *
|
|---|
| 313 | * @returns nothing.
|
|---|
| 314 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 315 | * @param pDrvIns The driver instance.
|
|---|
| 316 | */
|
|---|
| 317 | VMMR3DECL(void) PDMR3BlkCacheReleaseDriver(PVM pVM, PPDMDRVINS pDrvIns);
|
|---|
| 318 |
|
|---|
| 319 | /**
|
|---|
| 320 | * Releases all block cache handles for a USB device instance.
|
|---|
| 321 | *
|
|---|
| 322 | * @returns nothing.
|
|---|
| 323 | * @param pVM Pointer to the shared VM structure.
|
|---|
| 324 | * @param pUsbIns The USB device instance.
|
|---|
| 325 | */
|
|---|
| 326 | VMMR3DECL(void) PDMR3BlkCacheReleaseUsb(PVM pVM, PPDMUSBINS pUsbIns);
|
|---|
| 327 |
|
|---|
| 328 | /**
|
|---|
| 329 | * Creates a read task on the given endpoint.
|
|---|
| 330 | *
|
|---|
| 331 | * @returns VBox status code.
|
|---|
| 332 | * @param pEndpoint The file endpoint to read from.
|
|---|
| 333 | * @param off Where to start reading from.
|
|---|
| 334 | * @param paSegments Scatter gather list to store the data in.
|
|---|
| 335 | * @param cSegments Number of segments in the list.
|
|---|
| 336 | * @param cbRead The overall number of bytes to read.
|
|---|
| 337 | * @param pvUser Opaque user data returned in the completion callback
|
|---|
| 338 | * upon completion of the read.
|
|---|
| 339 | */
|
|---|
| 340 | VMMR3DECL(int) PDMR3BlkCacheRead(PPDMBLKCACHE pBlkCache, uint64_t off,
|
|---|
| 341 | PCRTSGBUF pcSgBuf, size_t cbRead, void *pvUser);
|
|---|
| 342 |
|
|---|
| 343 | /**
|
|---|
| 344 | * Creates a write task on the given endpoint.
|
|---|
| 345 | *
|
|---|
| 346 | * @returns VBox status code.
|
|---|
| 347 | * @param pEndpoint The file endpoint to write to.
|
|---|
| 348 | * @param off Where to start writing at.
|
|---|
| 349 | * @param paSegments Scatter gather list of the data to write.
|
|---|
| 350 | * @param cSegments Number of segments in the list.
|
|---|
| 351 | * @param cbWrite The overall number of bytes to write.
|
|---|
| 352 | * @param pvUser Opaque user data returned in the completion callback
|
|---|
| 353 | * upon completion of the task.
|
|---|
| 354 | */
|
|---|
| 355 | VMMR3DECL(int) PDMR3BlkCacheWrite(PPDMBLKCACHE pBlkCache, uint64_t off,
|
|---|
| 356 | PCRTSGBUF pcSgBuf, size_t cbWrite, void *pvUser);
|
|---|
| 357 |
|
|---|
| 358 | /**
|
|---|
| 359 | * Creates a flush task on the given endpoint.
|
|---|
| 360 | *
|
|---|
| 361 | * @returns VBox status code.
|
|---|
| 362 | * @param pEndpoint The file endpoint to flush.
|
|---|
| 363 | * @param pvUser Opaque user data returned in the completion callback
|
|---|
| 364 | * upon completion of the task.
|
|---|
| 365 | */
|
|---|
| 366 | VMMR3DECL(int) PDMR3BlkCacheFlush(PPDMBLKCACHE pBlkCache, void *pvUser);
|
|---|
| 367 |
|
|---|
| 368 | /**
|
|---|
| 369 | * Discards the given ranges from the cache.
|
|---|
| 370 | *
|
|---|
| 371 | * @returns VBox status code.
|
|---|
| 372 | * @param pEndpoint The file endpoint to flush.
|
|---|
| 373 | * @param paRanges Array of ranges to discard.
|
|---|
| 374 | * @param cRanges Number of ranges in the array.
|
|---|
| 375 | * @param pvUser Opaque user data returned in the completion callback
|
|---|
| 376 | * upon completion of the task.
|
|---|
| 377 | */
|
|---|
| 378 | VMMR3DECL(int) PDMR3BlkCacheDiscard(PPDMBLKCACHE pBlkCache, PCRTRANGE paRanges, unsigned cRanges, void *pvUser);
|
|---|
| 379 |
|
|---|
| 380 | /**
|
|---|
| 381 | * Notify the cache of a complete I/O transfer.
|
|---|
| 382 | *
|
|---|
| 383 | * @returns nothing.
|
|---|
| 384 | * @param pBlkCache The cache instance.
|
|---|
| 385 | * @param hIoXfer The I/O transfer handle which completed.
|
|---|
| 386 | * @param rcIoXfer The status code of the completed request.
|
|---|
| 387 | */
|
|---|
| 388 | VMMR3DECL(void) PDMR3BlkCacheIoXferComplete(PPDMBLKCACHE pBlkCache, PPDMBLKCACHEIOXFER hIoXfer, int rcIoXfer);
|
|---|
| 389 |
|
|---|
| 390 | /**
|
|---|
| 391 | * Suspends the block cache. The cache waits until all I/O transfers completed
|
|---|
| 392 | * and stops to enqueue new requests after the call returned but will not accept
|
|---|
| 393 | * reads, write or flushes either.
|
|---|
| 394 | *
|
|---|
| 395 | * @returns VBox status code.
|
|---|
| 396 | * @param pBlkCache The cache instance.
|
|---|
| 397 | */
|
|---|
| 398 | VMMR3DECL(int) PDMR3BlkCacheSuspend(PPDMBLKCACHE pBlkCache);
|
|---|
| 399 |
|
|---|
| 400 | /**
|
|---|
| 401 | * Resumes operation of the block cache.
|
|---|
| 402 | *
|
|---|
| 403 | * @returns VBox status code.
|
|---|
| 404 | * @param pBlkCache The cache instance.
|
|---|
| 405 | */
|
|---|
| 406 | VMMR3DECL(int) PDMR3BlkCacheResume(PPDMBLKCACHE pBlkCache);
|
|---|
| 407 |
|
|---|
| 408 | /**
|
|---|
| 409 | * Clears the block cache and removes all entries. The cache waits until all
|
|---|
| 410 | * I/O transfers completed.
|
|---|
| 411 | *
|
|---|
| 412 | * @returns VBox status code.
|
|---|
| 413 | * @param pBlkCache The cache instance.
|
|---|
| 414 | */
|
|---|
| 415 | VMMR3DECL(int) PDMR3BlkCacheClear(PPDMBLKCACHE pBlkCache);
|
|---|
| 416 |
|
|---|
| 417 | /** @} */
|
|---|
| 418 |
|
|---|
| 419 | RT_C_DECLS_END
|
|---|
| 420 |
|
|---|
| 421 | #endif
|
|---|
| 422 |
|
|---|
