| 1 | /* $Id: vbva.c 99739 2023-05-11 01:01:08Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox X11 Additions graphics driver 2D acceleration functions
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person
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| 10 | * obtaining a copy of this software and associated documentation
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| 11 | * files (the "Software"), to deal in the Software without
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| 12 | * restriction, including without limitation the rights to use,
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| 13 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 14 | * copies of the Software, and to permit persons to whom the
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| 15 | * Software is furnished to do so, subject to the following
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| 16 | * conditions:
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| 17 | *
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| 18 | * The above copyright notice and this permission notice shall be
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| 19 | * included in all copies or substantial portions of the Software.
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| 20 | *
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| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 22 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 23 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 24 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 25 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 26 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 27 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 28 | * OTHER DEALINGS IN THE SOFTWARE.
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| 29 | */
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| 30 |
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| 31 | #if defined(IN_XF86_MODULE) && !defined(NO_ANSIC)
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| 32 | # include "xf86_ansic.h"
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| 33 | #endif
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| 34 | #include "compiler.h"
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| 35 |
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| 36 | #include "vboxvideo.h"
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| 37 |
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| 38 | #ifdef XORG_7X
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| 39 | # include <stdlib.h>
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| 40 | # include <string.h>
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| 41 | #endif
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| 42 |
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| 43 | /**************************************************************************
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| 44 | * Main functions *
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| 45 | **************************************************************************/
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| 46 |
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| 47 | /**
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| 48 | * Callback function called by the X server to tell us about dirty
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| 49 | * rectangles in the video buffer.
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| 50 | *
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| 51 | * @param pScrn pointer to the information structure for the current
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| 52 | * screen
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| 53 | * @param iRects Number of dirty rectangles to update
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| 54 | * @param aRects Array of structures containing the coordinates of the
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| 55 | * rectangles
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| 56 | */
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| 57 | void vbvxHandleDirtyRect(ScrnInfoPtr pScrn, int iRects, BoxPtr aRects)
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| 58 | {
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| 59 | VBVACMDHDR cmdHdr;
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| 60 | VBOXPtr pVBox;
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| 61 | int i;
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| 62 | unsigned j;
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| 63 |
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| 64 | pVBox = pScrn->driverPrivate;
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| 65 | if (!pScrn->vtSema)
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| 66 | return;
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| 67 |
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| 68 | for (j = 0; j < pVBox->cScreens; ++j)
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| 69 | {
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| 70 | /* Just continue quietly if VBVA is not currently active. */
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| 71 | struct VBVABUFFER *pVBVA = pVBox->pScreens[j].aVbvaCtx.pVBVA;
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| 72 | if ( !pVBVA
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| 73 | || !(pVBVA->hostFlags.u32HostEvents & VBVA_F_MODE_ENABLED))
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| 74 | continue;
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| 75 | for (i = 0; i < iRects; ++i)
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| 76 | {
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| 77 | if ( aRects[i].x1 > pVBox->pScreens[j].aScreenLocation.x
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| 78 | + pVBox->pScreens[j].aScreenLocation.cx
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| 79 | || aRects[i].y1 > pVBox->pScreens[j].aScreenLocation.y
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| 80 | + pVBox->pScreens[j].aScreenLocation.cy
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| 81 | || aRects[i].x2 < pVBox->pScreens[j].aScreenLocation.x
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| 82 | || aRects[i].y2 < pVBox->pScreens[j].aScreenLocation.y)
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| 83 | continue;
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| 84 | cmdHdr.x = (int16_t)aRects[i].x1 - pVBox->pScreens[0].aScreenLocation.x;
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| 85 | cmdHdr.y = (int16_t)aRects[i].y1 - pVBox->pScreens[0].aScreenLocation.y;
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| 86 | cmdHdr.w = (uint16_t)(aRects[i].x2 - aRects[i].x1);
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| 87 | cmdHdr.h = (uint16_t)(aRects[i].y2 - aRects[i].y1);
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| 88 |
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| 89 | #if 0
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| 90 | TRACE_LOG("display=%u, x=%d, y=%d, w=%d, h=%d\n",
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| 91 | j, cmdHdr.x, cmdHdr.y, cmdHdr.w, cmdHdr.h);
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| 92 | #endif
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| 93 |
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| 94 | if (VBoxVBVABufferBeginUpdate(&pVBox->pScreens[j].aVbvaCtx,
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| 95 | &pVBox->guestCtx))
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| 96 | {
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| 97 | VBoxVBVAWrite(&pVBox->pScreens[j].aVbvaCtx, &pVBox->guestCtx, &cmdHdr,
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| 98 | sizeof(cmdHdr));
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| 99 | VBoxVBVABufferEndUpdate(&pVBox->pScreens[j].aVbvaCtx);
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| 100 | }
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| 101 | }
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| 102 | }
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| 103 | }
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| 104 |
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| 105 | static DECLCALLBACK(void *) hgsmiEnvAlloc(void *pvEnv, HGSMISIZE cb)
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| 106 | {
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| 107 | RT_NOREF(pvEnv);
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| 108 | return calloc(1, cb);
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| 109 | }
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| 110 |
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| 111 | static DECLCALLBACK(void) hgsmiEnvFree(void *pvEnv, void *pv)
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| 112 | {
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| 113 | RT_NOREF(pvEnv);
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| 114 | free(pv);
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| 115 | }
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| 116 |
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| 117 | static HGSMIENV g_hgsmiEnv =
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| 118 | {
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| 119 | NULL,
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| 120 | hgsmiEnvAlloc,
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| 121 | hgsmiEnvFree
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| 122 | };
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| 123 |
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| 124 | /**
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| 125 | * Calculate the location in video RAM of and initialise the heap for guest to
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| 126 | * host messages.
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| 127 | */
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| 128 | void vbvxSetUpHGSMIHeapInGuest(VBOXPtr pVBox, uint32_t cbVRAM)
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| 129 | {
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| 130 | int rc;
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| 131 | uint32_t offVRAMBaseMapping, offGuestHeapMemory, cbGuestHeapMemory;
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| 132 | void *pvGuestHeapMemory;
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| 133 |
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| 134 | VBoxHGSMIGetBaseMappingInfo(cbVRAM, &offVRAMBaseMapping, NULL, &offGuestHeapMemory, &cbGuestHeapMemory, NULL);
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| 135 | pvGuestHeapMemory = ((uint8_t *)pVBox->base) + offVRAMBaseMapping + offGuestHeapMemory;
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| 136 | rc = VBoxHGSMISetupGuestContext(&pVBox->guestCtx, pvGuestHeapMemory, cbGuestHeapMemory,
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| 137 | offVRAMBaseMapping + offGuestHeapMemory, &g_hgsmiEnv);
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| 138 | AssertMsg(RT_SUCCESS(rc), ("Failed to set up the guest-to-host message buffer heap, rc=%d\n", rc));
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| 139 | pVBox->cbView = offVRAMBaseMapping;
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| 140 | }
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| 141 |
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| 142 | /** Callback to fill in the view structures */
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| 143 | static DECLCALLBACK(int) vboxFillViewInfo(void *pvVBox, struct VBVAINFOVIEW *pViews, uint32_t cViews)
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| 144 | {
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| 145 | VBOXPtr pVBox = (VBOXPtr)pvVBox;
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| 146 | unsigned i;
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| 147 | for (i = 0; i < cViews; ++i)
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| 148 | {
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| 149 | pViews[i].u32ViewIndex = i;
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| 150 | pViews[i].u32ViewOffset = 0;
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| 151 | pViews[i].u32ViewSize = pVBox->cbView;
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| 152 | pViews[i].u32MaxScreenSize = pVBox->cbFBMax;
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| 153 | }
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| 154 | return VINF_SUCCESS;
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| 155 | }
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| 156 |
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| 157 | /**
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| 158 | * Initialise VirtualBox's accelerated video extensions.
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| 159 | *
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| 160 | * @returns TRUE on success, FALSE on failure
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| 161 | */
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| 162 | static Bool vboxSetupVRAMVbva(VBOXPtr pVBox)
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| 163 | {
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| 164 | int rc = VINF_SUCCESS;
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| 165 | unsigned i;
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| 166 |
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| 167 | pVBox->cbFBMax = pVBox->cbView;
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| 168 | for (i = 0; i < pVBox->cScreens; ++i)
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| 169 | {
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| 170 | pVBox->cbFBMax -= VBVA_MIN_BUFFER_SIZE;
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| 171 | pVBox->pScreens[i].aoffVBVABuffer = pVBox->cbFBMax;
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| 172 | TRACE_LOG("VBVA buffer offset for screen %u: 0x%lx\n", i,
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| 173 | (unsigned long) pVBox->cbFBMax);
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| 174 | VBoxVBVASetupBufferContext(&pVBox->pScreens[i].aVbvaCtx,
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| 175 | pVBox->pScreens[i].aoffVBVABuffer,
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| 176 | VBVA_MIN_BUFFER_SIZE);
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| 177 | }
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| 178 | TRACE_LOG("Maximum framebuffer size: %lu (0x%lx)\n",
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| 179 | (unsigned long) pVBox->cbFBMax,
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| 180 | (unsigned long) pVBox->cbFBMax);
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| 181 | rc = VBoxHGSMISendViewInfo(&pVBox->guestCtx, pVBox->cScreens,
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| 182 | vboxFillViewInfo, (void *)pVBox);
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| 183 | AssertMsg(RT_SUCCESS(rc), ("Failed to send the view information to the host, rc=%d\n", rc));
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| 184 | return TRUE;
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| 185 | }
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| 186 |
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| 187 | static Bool haveHGSMIModeHintAndCursorReportingInterface(VBOXPtr pVBox)
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| 188 | {
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| 189 | uint32_t fModeHintReporting, fCursorReporting;
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| 190 |
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| 191 | return RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_MODE_HINT_REPORTING, &fModeHintReporting))
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| 192 | && RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING, &fCursorReporting))
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| 193 | && fModeHintReporting == VINF_SUCCESS
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| 194 | && fCursorReporting == VINF_SUCCESS;
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| 195 | }
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| 196 |
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| 197 | static Bool hostHasScreenBlankingFlag(VBOXPtr pVBox)
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| 198 | {
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| 199 | uint32_t fScreenFlags;
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| 200 |
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| 201 | return RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_SCREEN_FLAGS, &fScreenFlags))
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| 202 | && fScreenFlags & VBVA_SCREEN_F_BLANK;
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| 203 | }
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| 204 |
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| 205 | /**
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| 206 | * Inform VBox that we will supply it with dirty rectangle information
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| 207 | * and install the dirty rectangle handler.
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| 208 | *
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| 209 | * @returns TRUE for success, FALSE for failure
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| 210 | * @param pScrn Pointer to a structure describing the X screen in use
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| 211 | */
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| 212 | Bool
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| 213 | vboxEnableVbva(ScrnInfoPtr pScrn)
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| 214 | {
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| 215 | Bool rc = TRUE;
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| 216 | unsigned i;
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| 217 | VBOXPtr pVBox = pScrn->driverPrivate;
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| 218 |
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| 219 | TRACE_ENTRY();
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| 220 | if (!vboxSetupVRAMVbva(pVBox))
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| 221 | return FALSE;
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| 222 | for (i = 0; i < pVBox->cScreens; ++i)
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| 223 | {
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| 224 | struct VBVABUFFER *pVBVA;
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| 225 |
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| 226 | pVBVA = (struct VBVABUFFER *) ( ((uint8_t *)pVBox->base)
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| 227 | + pVBox->pScreens[i].aoffVBVABuffer);
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| 228 | if (!VBoxVBVAEnable(&pVBox->pScreens[i].aVbvaCtx, &pVBox->guestCtx,
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| 229 | pVBVA, i))
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| 230 | rc = FALSE;
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| 231 | }
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| 232 | AssertMsg(rc, ("Failed to enable screen update reporting for at least one virtual monitor.\n"));
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| 233 | pVBox->fHaveHGSMIModeHints = haveHGSMIModeHintAndCursorReportingInterface(pVBox);
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| 234 | pVBox->fHostHasScreenBlankingFlag = hostHasScreenBlankingFlag(pVBox);
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| 235 | return rc;
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| 236 | }
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| 237 |
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| 238 | /**
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| 239 | * Inform VBox that we will stop supplying it with dirty rectangle
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| 240 | * information. This function is intended to be called when an X
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| 241 | * virtual terminal is disabled, or the X server is terminated.
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| 242 | *
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| 243 | * @param pScrn Pointer to a structure describing the X screen in use
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| 244 | */
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| 245 | void
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| 246 | vboxDisableVbva(ScrnInfoPtr pScrn)
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| 247 | {
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| 248 | unsigned i;
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| 249 | VBOXPtr pVBox = pScrn->driverPrivate;
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| 250 |
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| 251 | TRACE_ENTRY();
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| 252 | for (i = 0; i < pVBox->cScreens; ++i)
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| 253 | VBoxVBVADisable(&pVBox->pScreens[i].aVbvaCtx, &pVBox->guestCtx, i);
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| 254 | }
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