vbva.c revision ae5fc6ddd3d2ccdb941b1aacd23f6791fecc3354
/** @file
* VirtualBox X11 Additions graphics driver 2D acceleration functions
*/
/*
* Copyright (C) 2006-2007 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.
*/
#include <VBox/VMMDev.h>
#include <VBox/VBoxGuestLib.h>
#ifndef PCIACCESS
# include <xf86Pci.h>
# include <Pci.h>
#endif
#include "xf86.h"
#define NEED_XF86_TYPES
#include <iprt/string.h>
#include "compiler.h"
/* ShadowFB support */
#include "shadowfb.h"
#include "vboxvideo.h"
/**************************************************************************
* Main functions *
**************************************************************************/
/**
* Callback function called by the X server to tell us about dirty
* rectangles in the video buffer.
*
* @param pScreen pointer to the information structure for the current
* screen
* @param iRects Number of dirty rectangles to update
* @param aRects Array of structures containing the coordinates of the
* rectangles
*/
static void
vboxHandleDirtyRect(ScrnInfoPtr pScrn, int iRects, BoxPtr aRects)
{
VBVACMDHDR cmdHdr;
VBOXPtr pVBox;
int i;
unsigned j;
pVBox = pScrn->driverPrivate;
if (pVBox->fHaveHGSMI == FALSE || pVBox->vtSwitch)
return;
for (i = 0; i < iRects; ++i)
for (j = 0; j < pVBox->cScreens; ++j)
{
/* Just continue quietly if VBVA is not currently active. */
struct VBVABUFFER *pVBVA = pVBox->aVbvaCtx[j].pVBVA;
if ( !pVBVA
|| !(pVBVA->hostFlags.u32HostEvents & VBVA_F_MODE_ENABLED))
continue;
if ( aRects[i].x1 > pVBox->aScreenLocation[j].x
+ pVBox->aScreenLocation[j].cx
|| aRects[i].y1 > pVBox->aScreenLocation[j].y
+ pVBox->aScreenLocation[j].cy
|| aRects[i].x2 < pVBox->aScreenLocation[j].x
|| aRects[i].y2 < pVBox->aScreenLocation[j].y)
continue;
cmdHdr.x = (int16_t)aRects[i].x1;
cmdHdr.y = (int16_t)aRects[i].y1;
cmdHdr.w = (uint16_t)(aRects[i].x2 - aRects[i].x1);
cmdHdr.h = (uint16_t)(aRects[i].y2 - aRects[i].y1);
#if 0
TRACE_LOG("display=%u, x=%d, y=%d, w=%d, h=%d\n",
j, cmdHdr.x, cmdHdr.y, cmdHdr.w, cmdHdr.h);
#endif
if (VBoxVBVABufferBeginUpdate(&pVBox->aVbvaCtx[j],
&pVBox->guestCtx))
{
VBoxVBVAWrite(&pVBox->aVbvaCtx[j], &pVBox->guestCtx, &cmdHdr,
sizeof(cmdHdr));
VBoxVBVABufferEndUpdate(&pVBox->aVbvaCtx[j]);
}
}
}
/** Callback to fill in the view structures */
static int
vboxFillViewInfo(void *pvVBox, struct VBVAINFOVIEW *pViews, uint32_t cViews)
{
VBOXPtr pVBox = (VBOXPtr)pvVBox;
unsigned i;
for (i = 0; i < cViews; ++i)
{
pViews[i].u32ViewIndex = i;
pViews[i].u32ViewOffset = 0;
pViews[i].u32ViewSize = pVBox->cbView;
pViews[i].u32MaxScreenSize = pVBox->cbFBMax;
}
return VINF_SUCCESS;
}
/**
* Initialise VirtualBox's accelerated video extensions.
*
* @returns TRUE on success, FALSE on failure
*/
static Bool
vboxInitVbva(int scrnIndex, ScreenPtr pScreen, VBOXPtr pVBox)
{
ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
int rc = VINF_SUCCESS;
pVBox->cScreens = 1;
if (!VBoxHGSMIIsSupported())
{
xf86DrvMsg(scrnIndex, X_ERROR, "The graphics device does not seem to support HGSMI. Disableing video acceleration.\n");
return FALSE;
}
/* Set up the dirty rectangle handler. It will be added into a function
* chain and gets removed when the screen is cleaned up. */
if (ShadowFBInit2(pScreen, NULL, vboxHandleDirtyRect) != TRUE)
{
xf86DrvMsg(scrnIndex, X_ERROR,
"Unable to install dirty rectangle handler for VirtualBox graphics acceleration.\n");
return FALSE;
}
return TRUE;
}
/**
* Initialise VirtualBox's accelerated video extensions.
*
* @returns TRUE on success, FALSE on failure
*/
static Bool
vboxSetupVRAMVbva(ScrnInfoPtr pScrn, VBOXPtr pVBox)
{
int rc = VINF_SUCCESS;
unsigned i;
uint32_t offVRAMBaseMapping, offGuestHeapMemory, cbGuestHeapMemory;
void *pvGuestHeapMemory;
if (!pVBox->fHaveHGSMI)
return FALSE;
VBoxHGSMIGetBaseMappingInfo(pScrn->videoRam * 1024, &offVRAMBaseMapping,
NULL, &offGuestHeapMemory, &cbGuestHeapMemory,
NULL);
pvGuestHeapMemory = ((uint8_t *)pVBox->base) + offVRAMBaseMapping
+ offGuestHeapMemory;
TRACE_LOG("video RAM: %u KB, guest heap offset: 0x%x, cbGuestHeapMemory: %u\n",
pScrn->videoRam, offVRAMBaseMapping + offGuestHeapMemory,
cbGuestHeapMemory);
rc = VBoxHGSMISetupGuestContext(&pVBox->guestCtx, pvGuestHeapMemory,
cbGuestHeapMemory,
offVRAMBaseMapping + offGuestHeapMemory);
if (RT_FAILURE(rc))
{
xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Failed to set up the guest-to-host communication context, rc=%d\n", rc);
return FALSE;
}
pVBox->cbView = pVBox->cbFBMax = offVRAMBaseMapping;
pVBox->cScreens = VBoxHGSMIGetMonitorCount(&pVBox->guestCtx);
xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Requested monitor count: %u\n",
pVBox->cScreens);
for (i = 0; i < pVBox->cScreens; ++i)
{
pVBox->cbFBMax -= VBVA_MIN_BUFFER_SIZE;
pVBox->aoffVBVABuffer[i] = pVBox->cbFBMax;
TRACE_LOG("VBVA buffer offset for screen %u: 0x%lx\n", i,
(unsigned long) pVBox->cbFBMax);
VBoxVBVASetupBufferContext(&pVBox->aVbvaCtx[i],
pVBox->aoffVBVABuffer[i],
VBVA_MIN_BUFFER_SIZE);
}
TRACE_LOG("Maximum framebuffer size: %lu (0x%lx)\n",
(unsigned long) pVBox->cbFBMax,
(unsigned long) pVBox->cbFBMax);
rc = VBoxHGSMISendViewInfo(&pVBox->guestCtx, pVBox->cScreens,
vboxFillViewInfo, (void *)pVBox);
if (RT_FAILURE(rc))
{
xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Failed to send the view information to the host, rc=%d\n", rc);
return FALSE;
}
return TRUE;
}
Bool
vbox_open(ScrnInfoPtr pScrn, ScreenPtr pScreen, VBOXPtr pVBox)
{
TRACE_ENTRY();
pVBox->fHaveHGSMI = vboxInitVbva(pScrn->scrnIndex, pScreen, pVBox);
return pVBox->fHaveHGSMI;
}
Bool
vbox_device_available(VBOXPtr pVBox)
{
return pVBox->useDevice;
}
/**
* Inform VBox that we will supply it with dirty rectangle information
* and install the dirty rectangle handler.
*
* @returns TRUE for success, FALSE for failure
* @param pScrn Pointer to a structure describing the X screen in use
*/
Bool
vboxEnableVbva(ScrnInfoPtr pScrn)
{
bool rc = TRUE;
int scrnIndex = pScrn->scrnIndex;
unsigned i;
VBOXPtr pVBox = pScrn->driverPrivate;
TRACE_ENTRY();
if (!vboxSetupVRAMVbva(pScrn, pVBox))
return FALSE;
for (i = 0; i < pVBox->cScreens; ++i)
{
struct VBVABUFFER *pVBVA;
pVBVA = (struct VBVABUFFER *) ( ((uint8_t *)pVBox->base)
+ pVBox->aoffVBVABuffer[i]);
if (!VBoxVBVAEnable(&pVBox->aVbvaCtx[i], &pVBox->guestCtx, pVBVA, i))
rc = FALSE;
}
if (!rc)
{
/* Request not accepted - disable for old hosts. */
xf86DrvMsg(scrnIndex, X_ERROR,
"Failed to enable screen update reporting for at least one virtual monitor.\n");
vboxDisableVbva(pScrn);
}
return rc;
}
/**
* Inform VBox that we will stop supplying it with dirty rectangle
* information. This function is intended to be called when an X
* virtual terminal is disabled, or the X server is terminated.
*
* @returns TRUE for success, FALSE for failure
* @param pScrn Pointer to a structure describing the X screen in use
*/
void
vboxDisableVbva(ScrnInfoPtr pScrn)
{
int rc;
int scrnIndex = pScrn->scrnIndex;
unsigned i;
VBOXPtr pVBox = pScrn->driverPrivate;
TRACE_ENTRY();
if (!pVBox->fHaveHGSMI) /* Ths function should not have been called */
return;
for (i = 0; i < pVBox->cScreens; ++i)
VBoxVBVADisable(&pVBox->aVbvaCtx[i], &pVBox->guestCtx, i);
}