Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 422 insertions, 0 deletions

diff --git a/include/VBox/vmm/pdmblkcache.h b/include/VBox/vmm/pdmblkcache.h
new file mode 100644
index 00000000..4ba66405
--- /dev/null
+++ b/include/VBox/vmm/pdmblkcache.h
@@ -0,0 +1,422 @@
+/** @file
+ * PDM - Pluggable Device Manager, Block cache.
+ */
+
+/*
+ * Copyright (C) 2007-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+#ifndef VBOX_INCLUDED_vmm_pdmblkcache_h
+#define VBOX_INCLUDED_vmm_pdmblkcache_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <VBox/types.h>
+#include <iprt/sg.h>
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_pdm_blk_cache  The PDM Block Cache API
+ * @ingroup grp_pdm
+ * @{
+ */
+
+/** Pointer to a PDM block cache. */
+typedef struct PDMBLKCACHE *PPDMBLKCACHE;
+/** Pointer to a PDM block cache pointer. */
+typedef PPDMBLKCACHE *PPPDMBLKCACHE;
+
+/** I/O transfer handle. */
+typedef struct PDMBLKCACHEIOXFER *PPDMBLKCACHEIOXFER;
+
+/**
+ * Block cache I/O request transfer direction.
+ */
+typedef enum PDMBLKCACHEXFERDIR
+{
+    /** Read */
+    PDMBLKCACHEXFERDIR_READ = 0,
+    /** Write */
+    PDMBLKCACHEXFERDIR_WRITE,
+    /** Flush */
+    PDMBLKCACHEXFERDIR_FLUSH,
+    /** Discard */
+    PDMBLKCACHEXFERDIR_DISCARD
+} PDMBLKCACHEXFERDIR;
+
+/**
+ * Completion callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   pvUser          User argument given during request initiation.
+ * @param   rc              The status code of the completed request.
+ */
+typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEDRV(PPDMDRVINS pDrvIns, void *pvUser, int rc);
+/** Pointer to a FNPDMBLKCACHEXFERCOMPLETEDRV(). */
+typedef FNPDMBLKCACHEXFERCOMPLETEDRV *PFNPDMBLKCACHEXFERCOMPLETEDRV;
+
+/**
+ * I/O enqueue callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   enmXferDir      Transfer direction.
+ * @param   off             Transfer offset.
+ * @param   cbXfer          Transfer size.
+ * @param   pSgBuf          Scather / gather buffer for the transfer.
+ * @param   hIoXfer         I/O transfer handle to ping on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDRV(PPDMDRVINS pDrvIns, PDMBLKCACHEXFERDIR enmXferDir,
+                                                      uint64_t off, size_t cbXfer, PCRTSGBUF pSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDRV(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDRV *PFNPDMBLKCACHEXFERENQUEUEDRV;
+
+/**
+ * Discard enqueue callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   paRanges        Ranges to discard.
+ * @param   cRanges         Number of range entries.
+ * @param   hIoXfer         I/O handle to return on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDDRV(PPDMDRVINS pDrvIns, PCRTRANGE paRanges, unsigned cRanges,
+                                                             PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDDRV(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDISCARDDRV *PFNPDMBLKCACHEXFERENQUEUEDISCARDDRV;
+
+/**
+ * Completion callback for devices.
+ *
+ * @param   pDrvIns         The device instance.
+ * @param   pvUser          User argument given during request initiation.
+ * @param   rc              The status code of the completed request.
+ */
+typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEDEV(PPDMDEVINS pDevIns, void *pvUser, int rc);
+/** Pointer to a FNPDMBLKCACHEXFERCOMPLETEDEV(). */
+typedef FNPDMBLKCACHEXFERCOMPLETEDEV *PFNPDMBLKCACHEXFERCOMPLETEDEV;
+
+/**
+ * I/O enqueue callback for devices.
+ *
+ * @param   pDevIns         The device instance.
+ * @param   enmXferDir      Transfer direction.
+ * @param   off             Transfer offset.
+ * @param   cbXfer          Transfer size.
+ * @param   pSgBuf          Scather / gather buffer for the transfer.
+ * @param   hIoXfer         I/O transfer handle to ping on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDEV(PPDMDEVINS pDevIns, PDMBLKCACHEXFERDIR enmXferDir,
+                                                      uint64_t off, size_t cbXfer, PCRTSGBUF pSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDEV(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDEV *PFNPDMBLKCACHEXFERENQUEUEDEV;
+
+/**
+ * Discard enqueue callback for devices.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   paRanges        Ranges to discard.
+ * @param   cRanges         Number of range entries.
+ * @param   hIoXfer         I/O handle to return on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDDEV(PPDMDEVINS pDevIns, PCRTRANGE paRanges, unsigned cRanges,
+                                                             PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDDEV(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDISCARDDEV *PFNPDMBLKCACHEXFERENQUEUEDISCARDDEV;
+
+/**
+ * Completion callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   pvUser          User argument given during request initiation.
+ * @param   rc              The status code of the completed request.
+ */
+typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEINT(void *pvUserInt, void *pvUser, int rc);
+/** Pointer to a FNPDMBLKCACHEXFERCOMPLETEINT(). */
+typedef FNPDMBLKCACHEXFERCOMPLETEINT *PFNPDMBLKCACHEXFERCOMPLETEINT;
+
+/**
+ * I/O enqueue callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   enmXferDir      Transfer direction.
+ * @param   off             Transfer offset.
+ * @param   cbXfer          Transfer size.
+ * @param   pSgBuf          Scather / gather buffer for the transfer.
+ * @param   hIoXfer         I/O transfer handle to ping on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEINT(void *pvUser, PDMBLKCACHEXFERDIR enmXferDir,
+                                                      uint64_t off, size_t cbXfer, PCRTSGBUF pSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEINT(). */
+typedef FNPDMBLKCACHEXFERENQUEUEINT *PFNPDMBLKCACHEXFERENQUEUEINT;
+
+/**
+ * Discard enqueue callback for VMM internal users.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   paRanges        Ranges to discard.
+ * @param   cRanges         Number of range entries.
+ * @param   hIoXfer         I/O handle to return on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDINT(void *pvUser, PCRTRANGE paRanges, unsigned cRanges,
+                                                             PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDINT(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDISCARDINT *PFNPDMBLKCACHEXFERENQUEUEDISCARDINT;
+
+/**
+ * Completion callback for USB.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   pvUser          User argument given during request initiation.
+ * @param   rc              The status code of the completed request.
+ */
+typedef DECLCALLBACK(void) FNPDMBLKCACHEXFERCOMPLETEUSB(PPDMUSBINS pUsbIns, void *pvUser, int rc);
+/** Pointer to a FNPDMBLKCACHEXFERCOMPLETEUSB(). */
+typedef FNPDMBLKCACHEXFERCOMPLETEUSB *PFNPDMBLKCACHEXFERCOMPLETEUSB;
+
+/**
+ * I/O enqueue callback for drivers.
+ *
+ * @param   pDrvIns         The driver instance.
+ * @param   enmXferDir      Transfer direction.
+ * @param   off             Transfer offset.
+ * @param   cbXfer          Transfer size.
+ * @param   pSgBuf          Scather / gather buffer for the transfer.
+ * @param   hIoXfer         I/O transfer handle to ping on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEUSB(PPDMUSBINS pUsbIns, PDMBLKCACHEXFERDIR enmXferDir,
+                                                      uint64_t off, size_t cbXfer, PCRTSGBUF pSgBuf, PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEUSB(). */
+typedef FNPDMBLKCACHEXFERENQUEUEUSB *PFNPDMBLKCACHEXFERENQUEUEUSB;
+
+/**
+ * Discard enqueue callback for USB devices.
+ *
+ * @param   pUsbIns         The USB device instance.
+ * @param   paRanges        Ranges to discard.
+ * @param   cRanges         Number of range entries.
+ * @param   hIoXfer         I/O handle to return on completion.
+ */
+typedef DECLCALLBACK(int) FNPDMBLKCACHEXFERENQUEUEDISCARDUSB(PPDMUSBINS pUsbIns, PCRTRANGE paRanges, unsigned cRanges,
+                                                             PPDMBLKCACHEIOXFER hIoXfer);
+/** Pointer to a FNPDMBLKCACHEXFERENQUEUEDISCARDUSB(). */
+typedef FNPDMBLKCACHEXFERENQUEUEDISCARDUSB *PFNPDMBLKCACHEXFERENQUEUEDISCARDUSB;
+
+/**
+ * Create a block cache user for a driver instance.
+ *
+ * @returns VBox status code.
+ * @param   pVM                      The cross context VM structure.
+ * @param   pDrvIns                  The driver instance.
+ * @param   ppBlkCache               Where to store the handle to the block cache.
+ * @param   pfnXferComplete          The I/O transfer complete callback.
+ * @param   pfnXferEnqueue           The I/O request enqueue callback.
+ * @param   pfnXferEnqueueDiscard    The discard request enqueue callback.
+ * @param   pcszId                   Unique ID used to identify the user.
+ */
+VMMR3DECL(int) PDMR3BlkCacheRetainDriver(PVM pVM, PPDMDRVINS pDrvIns, PPPDMBLKCACHE ppBlkCache,
+                                         PFNPDMBLKCACHEXFERCOMPLETEDRV pfnXferComplete,
+                                         PFNPDMBLKCACHEXFERENQUEUEDRV pfnXferEnqueue,
+                                         PFNPDMBLKCACHEXFERENQUEUEDISCARDDRV pfnXferEnqueueDiscard,
+                                         const char *pcszId);
+
+/**
+ * Create a block cache user for a device instance.
+ *
+ * @returns VBox status code.
+ * @param   pVM                      The cross context VM structure.
+ * @param   pDevIns                  The device instance.
+ * @param   ppBlkCache               Where to store the handle to the block cache.
+ * @param   pfnXferComplete          The I/O transfer complete callback.
+ * @param   pfnXferEnqueue           The I/O request enqueue callback.
+ * @param   pfnXferEnqueueDiscard    The discard request enqueue callback.
+ * @param   pcszId                   Unique ID used to identify the user.
+ */
+VMMR3DECL(int) PDMR3BlkCacheRetainDevice(PVM pVM, PPDMDEVINS pDevIns, PPPDMBLKCACHE ppBlkCache,
+                                         PFNPDMBLKCACHEXFERCOMPLETEDEV pfnXferComplete,
+                                         PFNPDMBLKCACHEXFERENQUEUEDEV pfnXferEnqueue,
+                                         PFNPDMBLKCACHEXFERENQUEUEDISCARDDEV pfnXferEnqueueDiscard,
+                                         const char *pcszId);
+
+/**
+ * Create a block cache user for a USB instance.
+ *
+ * @returns VBox status code.
+ * @param   pVM                      The cross context VM structure.
+ * @param   pUsbIns                  The USB device instance.
+ * @param   ppBlkCache               Where to store the handle to the block cache.
+ * @param   pfnXferComplete          The I/O transfer complete callback.
+ * @param   pfnXferEnqueue           The I/O request enqueue callback.
+ * @param   pfnXferEnqueueDiscard    The discard request enqueue callback.
+ * @param   pcszId                   Unique ID used to identify the user.
+ */
+VMMR3DECL(int) PDMR3BlkCacheRetainUsb(PVM pVM, PPDMUSBINS pUsbIns, PPPDMBLKCACHE ppBlkCache,
+                                      PFNPDMBLKCACHEXFERCOMPLETEUSB pfnXferComplete,
+                                      PFNPDMBLKCACHEXFERENQUEUEUSB pfnXferEnqueue,
+                                      PFNPDMBLKCACHEXFERENQUEUEDISCARDUSB pfnXferEnqueueDiscard,
+                                      const char *pcszId);
+
+/**
+ * Create a block cache user for internal use by VMM.
+ *
+ * @returns VBox status code.
+ * @param   pVM                      The cross context VM structure.
+ * @param   pvUser                   Opaque user data.
+ * @param   ppBlkCache               Where to store the handle to the block cache.
+ * @param   pfnXferComplete          The I/O transfer complete callback.
+ * @param   pfnXferEnqueue           The I/O request enqueue callback.
+ * @param   pfnXferEnqueueDiscard    The discard request enqueue callback.
+ * @param   pcszId                   Unique ID used to identify the user.
+ */
+VMMR3DECL(int) PDMR3BlkCacheRetainInt(PVM pVM, void *pvUser, PPPDMBLKCACHE ppBlkCache,
+                                      PFNPDMBLKCACHEXFERCOMPLETEINT pfnXferComplete,
+                                      PFNPDMBLKCACHEXFERENQUEUEINT pfnXferEnqueue,
+                                      PFNPDMBLKCACHEXFERENQUEUEDISCARDINT pfnXferEnqueueDiscard,
+                                      const char *pcszId);
+
+/**
+ * Releases a block cache handle.
+ *
+ * @returns nothing.
+ * @param   pBlkCache       Block cache handle.
+ */
+VMMR3DECL(void) PDMR3BlkCacheRelease(PPDMBLKCACHE pBlkCache);
+
+/**
+ * Releases all block cache handles for a device instance.
+ *
+ * @returns nothing.
+ * @param   pVM             The cross context VM structure.
+ * @param   pDevIns         The device instance.
+ */
+VMMR3DECL(void) PDMR3BlkCacheReleaseDevice(PVM pVM, PPDMDEVINS pDevIns);
+
+/**
+ * Releases all block cache handles for a driver instance.
+ *
+ * @returns nothing.
+ * @param   pVM             The cross context VM structure.
+ * @param   pDrvIns         The driver instance.
+ */
+VMMR3DECL(void) PDMR3BlkCacheReleaseDriver(PVM pVM, PPDMDRVINS pDrvIns);
+
+/**
+ * Releases all block cache handles for a USB device instance.
+ *
+ * @returns nothing.
+ * @param   pVM             The cross context VM structure.
+ * @param   pUsbIns         The USB device instance.
+ */
+VMMR3DECL(void) PDMR3BlkCacheReleaseUsb(PVM pVM, PPDMUSBINS pUsbIns);
+
+/**
+ * Creates a read task on the given endpoint.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ * @param   off             Where to start reading from.
+ * @param   pSgBuf          Scatter gather buffer store the data in.
+ * @param   cbRead          The overall number of bytes to read.
+ * @param   pvUser          Opaque user data returned in the completion callback
+ *                          upon completion of the read.
+ */
+VMMR3DECL(int) PDMR3BlkCacheRead(PPDMBLKCACHE pBlkCache, uint64_t off, PCRTSGBUF pSgBuf, size_t cbRead, void *pvUser);
+
+/**
+ * Creates a write task on the given endpoint.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ * @param   off             Where to start writing at.
+ * @param   pSgBuf          Scatter gather buffer gather the data from.
+ * @param   cbWrite         The overall number of bytes to write.
+ * @param   pvUser          Opaque user data returned in the completion callback
+ *                          upon completion of the task.
+ */
+VMMR3DECL(int) PDMR3BlkCacheWrite(PPDMBLKCACHE pBlkCache, uint64_t off, PCRTSGBUF pSgBuf, size_t cbWrite, void *pvUser);
+
+/**
+ * Creates a flush task on the given endpoint.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ * @param   pvUser          Opaque user data returned in the completion callback
+ *                          upon completion of the task.
+ */
+VMMR3DECL(int) PDMR3BlkCacheFlush(PPDMBLKCACHE pBlkCache, void *pvUser);
+
+/**
+ * Discards the given ranges from the cache.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ * @param   paRanges        Array of ranges to discard.
+ * @param   cRanges         Number of ranges in the array.
+ * @param   pvUser          Opaque user data returned in the completion callback
+ *                          upon completion of the task.
+ */
+VMMR3DECL(int) PDMR3BlkCacheDiscard(PPDMBLKCACHE pBlkCache, PCRTRANGE paRanges, unsigned cRanges, void *pvUser);
+
+/**
+ * Notify the cache of a complete I/O transfer.
+ *
+ * @returns nothing.
+ * @param   pBlkCache       The cache instance.
+ * @param   hIoXfer         The I/O transfer handle which completed.
+ * @param   rcIoXfer        The status code of the completed request.
+ */
+VMMR3DECL(void) PDMR3BlkCacheIoXferComplete(PPDMBLKCACHE pBlkCache, PPDMBLKCACHEIOXFER hIoXfer, int rcIoXfer);
+
+/**
+ * Suspends the block cache.
+ *
+ * The cache waits until all I/O transfers completed and stops to enqueue new
+ * requests after the call returned but will not accept reads, write or flushes
+ * either.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ */
+VMMR3DECL(int) PDMR3BlkCacheSuspend(PPDMBLKCACHE pBlkCache);
+
+/**
+ * Resumes operation of the block cache.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ */
+VMMR3DECL(int) PDMR3BlkCacheResume(PPDMBLKCACHE pBlkCache);
+
+/**
+ * Clears the block cache and removes all entries.
+ *
+ * The cache waits until all I/O transfers completed.
+ *
+ * @returns VBox status code.
+ * @param   pBlkCache       The cache instance.
+ */
+VMMR3DECL(int) PDMR3BlkCacheClear(PPDMBLKCACHE pBlkCache);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_vmm_pdmblkcache_h */
+