| 1 | /* $Id: getmode.c 76480 2018-12-26 02:12:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox X11 Additions graphics driver dynamic video mode functions.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2017 Oracle Corporation
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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 | #include "vboxvideo.h"
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| 32 |
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| 33 | #define NEED_XF86_TYPES
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| 34 | #include "xf86.h"
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| 35 |
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| 36 | #ifdef XORG_7X
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| 37 | # include <stdio.h>
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| 38 | # include <stdlib.h>
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| 39 | # include <string.h>
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| 40 | #endif
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| 41 |
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| 42 | #ifdef VBOXVIDEO_13
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| 43 | # ifdef RT_OS_LINUX
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| 44 | # include <linux/input.h>
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| 45 | # ifndef EVIOCGRAB
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| 46 | # define EVIOCGRAB _IOW('E', 0x90, int)
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| 47 | # endif
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| 48 | # ifndef KEY_SWITCHVIDEOMODE
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| 49 | # define KEY_SWITCHVIDEOMODE 227
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| 50 | # endif
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| 51 | # include <dirent.h>
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| 52 | # include <errno.h>
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| 53 | # include <fcntl.h>
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| 54 | # include <unistd.h>
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| 55 | # endif /* RT_OS_LINUX */
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| 56 | #endif /* VBOXVIDEO_13 */
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| 57 |
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| 58 | /**************************************************************************
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| 59 | * Main functions *
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| 60 | **************************************************************************/
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| 61 |
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| 62 | /**
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| 63 | * Fills a display mode M with a built-in mode of name pszName and dimensions
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| 64 | * cx and cy.
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| 65 | */
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| 66 | static void vboxFillDisplayMode(ScrnInfoPtr pScrn, DisplayModePtr m,
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| 67 | const char *pszName, unsigned cx, unsigned cy)
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| 68 | {
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| 69 | VBOXPtr pVBox = pScrn->driverPrivate;
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| 70 | char szName[256];
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| 71 | DisplayModePtr pPrev = m->prev;
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| 72 | DisplayModePtr pNext = m->next;
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| 73 |
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| 74 | if (!pszName)
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| 75 | {
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| 76 | sprintf(szName, "%ux%u", cx, cy);
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| 77 | pszName = szName;
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| 78 | }
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| 79 | TRACE_LOG("pszName=%s, cx=%u, cy=%u\n", pszName, cx, cy);
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| 80 | if (m->name)
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| 81 | free((void*)m->name);
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| 82 | memset(m, '\0', sizeof(*m));
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| 83 | m->prev = pPrev;
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| 84 | m->next = pNext;
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| 85 | m->status = MODE_OK;
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| 86 | m->type = M_T_BUILTIN;
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| 87 | /* Older versions of VBox only support screen widths which are a multiple
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| 88 | * of 8 */
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| 89 | if (pVBox->fAnyX)
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| 90 | m->HDisplay = cx;
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| 91 | else
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| 92 | m->HDisplay = cx & ~7;
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| 93 | m->HSyncStart = m->HDisplay + 2;
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| 94 | m->HSyncEnd = m->HDisplay + 4;
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| 95 | m->HTotal = m->HDisplay + 6;
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| 96 | m->VDisplay = cy;
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| 97 | m->VSyncStart = m->VDisplay + 2;
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| 98 | m->VSyncEnd = m->VDisplay + 4;
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| 99 | m->VTotal = m->VDisplay + 6;
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| 100 | m->Clock = m->HTotal * m->VTotal * 60 / 1000; /* kHz */
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| 101 | m->name = xnfstrdup(pszName);
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| 102 | }
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| 103 |
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| 104 | /**
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| 105 | * Allocates an empty display mode and links it into the doubly linked list of
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| 106 | * modes pointed to by pScrn->modes. Returns a pointer to the newly allocated
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| 107 | * memory.
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| 108 | */
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| 109 | static DisplayModePtr vboxAddEmptyScreenMode(ScrnInfoPtr pScrn)
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| 110 | {
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| 111 | DisplayModePtr pMode = xnfcalloc(sizeof(DisplayModeRec), 1);
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| 112 |
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| 113 | TRACE_ENTRY();
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| 114 | if (!pScrn->modes)
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| 115 | {
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| 116 | pScrn->modes = pMode;
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| 117 | pMode->next = pMode;
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| 118 | pMode->prev = pMode;
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| 119 | }
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| 120 | else
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| 121 | {
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| 122 | pMode->next = pScrn->modes;
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| 123 | pMode->prev = pScrn->modes->prev;
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| 124 | pMode->next->prev = pMode;
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| 125 | pMode->prev->next = pMode;
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| 126 | }
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| 127 | return pMode;
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| 128 | }
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| 129 |
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| 130 | /**
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| 131 | * Create display mode entries in the screen information structure for each
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| 132 | * of the graphics modes that we wish to support, that is:
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| 133 | * - A dynamic mode in first place which will be updated by the RandR code.
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| 134 | * - Any modes that the user requested in xorg.conf/XFree86Config.
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| 135 | */
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| 136 | void vboxAddModes(ScrnInfoPtr pScrn)
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| 137 | {
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| 138 | unsigned cx = 0;
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| 139 | unsigned cy = 0;
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| 140 | unsigned i;
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| 141 | DisplayModePtr pMode;
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| 142 |
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| 143 | /* Add two dynamic mode entries. When we receive a new size hint we will
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| 144 | * update whichever of these is not current. */
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| 145 | pMode = vboxAddEmptyScreenMode(pScrn);
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| 146 | vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
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| 147 | pMode = vboxAddEmptyScreenMode(pScrn);
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| 148 | vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
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| 149 | /* Add any modes specified by the user. We assume here that the mode names
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| 150 | * reflect the mode sizes. */
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| 151 | for (i = 0; pScrn->display->modes && pScrn->display->modes[i]; i++)
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| 152 | {
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| 153 | if (sscanf(pScrn->display->modes[i], "%ux%u", &cx, &cy) == 2)
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| 154 | {
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| 155 | pMode = vboxAddEmptyScreenMode(pScrn);
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| 156 | vboxFillDisplayMode(pScrn, pMode, pScrn->display->modes[i], cx, cy);
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| 157 | }
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| 158 | }
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| 159 | }
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| 160 |
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| 161 | /** Set the initial values for the guest screen size hints to standard values
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| 162 | * in case nothing else is available. */
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| 163 | void VBoxInitialiseSizeHints(ScrnInfoPtr pScrn)
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| 164 | {
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| 165 | VBOXPtr pVBox = VBOXGetRec(pScrn);
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| 166 | unsigned i;
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| 167 |
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| 168 | for (i = 0; i < pVBox->cScreens; ++i)
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| 169 | {
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| 170 | pVBox->pScreens[i].aPreferredSize.cx = 800;
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| 171 | pVBox->pScreens[i].aPreferredSize.cy = 600;
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| 172 | pVBox->pScreens[i].afConnected = true;
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| 173 | }
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| 174 | /* Set up the first mode correctly to match the requested initial mode. */
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| 175 | pScrn->modes->HDisplay = pVBox->pScreens[0].aPreferredSize.cx;
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| 176 | pScrn->modes->VDisplay = pVBox->pScreens[0].aPreferredSize.cy;
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| 177 | }
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| 178 |
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| 179 | static Bool useHardwareCursor(uint32_t fCursorCapabilities)
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| 180 | {
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| 181 | if (fCursorCapabilities & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)
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| 182 | return true;
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| 183 | return false;
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| 184 | }
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| 185 |
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| 186 | static void compareAndMaybeSetUseHardwareCursor(VBOXPtr pVBox, uint32_t fCursorCapabilities, Bool *pfChanged, Bool fSet)
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| 187 | {
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| 188 | if (pVBox->fUseHardwareCursor != useHardwareCursor(fCursorCapabilities))
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| 189 | *pfChanged = true;
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| 190 | if (fSet)
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| 191 | pVBox->fUseHardwareCursor = useHardwareCursor(fCursorCapabilities);
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| 192 | }
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| 193 |
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| 194 | #define COMPARE_AND_MAYBE_SET(pDest, src, pfChanged, fSet) \
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| 195 | do { \
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| 196 | if (*(pDest) != (src)) \
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| 197 | { \
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| 198 | if (fSet) \
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| 199 | *(pDest) = (src); \
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| 200 | *(pfChanged) = true; \
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| 201 | } \
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| 202 | } while(0)
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| 203 |
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| 204 | /** Read in information about the most recent size hints and cursor
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| 205 | * capabilities requested for the guest screens from HGSMI. */
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| 206 | void vbvxReadSizesAndCursorIntegrationFromHGSMI(ScrnInfoPtr pScrn, Bool *pfNeedUpdate)
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| 207 | {
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| 208 | VBOXPtr pVBox = VBOXGetRec(pScrn);
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| 209 | int rc;
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| 210 | unsigned i;
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| 211 | Bool fChanged = false;
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| 212 | uint32_t fCursorCapabilities;
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| 213 |
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| 214 | if (!pVBox->fHaveHGSMIModeHints)
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| 215 | return;
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| 216 | rc = VBoxHGSMIGetModeHints(&pVBox->guestCtx, pVBox->cScreens, pVBox->paVBVAModeHints);
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| 217 | AssertMsg(rc == VINF_SUCCESS, ("VBoxHGSMIGetModeHints failed, rc=%d.\n", rc));
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| 218 | for (i = 0; i < pVBox->cScreens; ++i)
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| 219 | if (pVBox->paVBVAModeHints[i].magic == VBVAMODEHINT_MAGIC)
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| 220 | {
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| 221 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cx, pVBox->paVBVAModeHints[i].cx & 0x8fff, &fChanged, true);
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| 222 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cy, pVBox->paVBVAModeHints[i].cy & 0x8fff, &fChanged, true);
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| 223 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afConnected, RT_BOOL(pVBox->paVBVAModeHints[i].fEnabled), &fChanged, true);
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| 224 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.x, (int32_t)pVBox->paVBVAModeHints[i].dx & 0x8fff, &fChanged,
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| 225 | true);
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| 226 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.y, (int32_t)pVBox->paVBVAModeHints[i].dy & 0x8fff, &fChanged,
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| 227 | true);
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| 228 | if (pVBox->paVBVAModeHints[i].dx != ~(uint32_t)0 && pVBox->paVBVAModeHints[i].dy != ~(uint32_t)0)
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| 229 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, true, &fChanged, true);
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| 230 | else
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| 231 | COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, false, &fChanged, true);
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| 232 | }
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| 233 | rc = VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &fCursorCapabilities);
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| 234 | AssertMsg(rc == VINF_SUCCESS, ("Getting VBOX_VBVA_CONF32_CURSOR_CAPABILITIES failed, rc=%d.\n", rc));
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| 235 | compareAndMaybeSetUseHardwareCursor(pVBox, fCursorCapabilities, &fChanged, true);
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| 236 | if (pfNeedUpdate != NULL && fChanged)
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| 237 | *pfNeedUpdate = true;
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| 238 | }
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| 239 |
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| 240 | #undef COMPARE_AND_MAYBE_SET
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| 241 |
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| 242 | #ifdef VBOXVIDEO_13
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| 243 | # ifdef RT_OS_LINUX
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| 244 | /** We have this for two purposes: one is to ensure that the X server is woken
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| 245 | * up when we get a video ACPI event. Two is to grab ACPI video events to
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| 246 | * prevent gnome-settings-daemon from seeing them, as older versions ignored
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| 247 | * the time stamp and handled them at the wrong time. */
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| 248 | static void acpiEventHandler(int fd, void *pvData)
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| 249 | {
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| 250 | struct input_event event;
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| 251 | ssize_t rc;
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| 252 | RT_NOREF(pvData);
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| 253 |
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| 254 | do
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| 255 | rc = read(fd, &event, sizeof(event));
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| 256 | while (rc > 0 || (rc == -1 && errno == EINTR));
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| 257 | /* Why do they return EAGAIN instead of zero bytes read like everyone else does? */
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| 258 | AssertMsg(rc != -1 || errno == EAGAIN, ("Reading ACPI input event failed.\n"));
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| 259 | }
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| 260 |
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| 261 | void vbvxSetUpLinuxACPI(ScreenPtr pScreen)
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| 262 | {
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| 263 | static const char s_szDevInput[] = "/dev/input/";
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| 264 | struct dirent *pDirent;
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| 265 | char szFile[sizeof(s_szDevInput) + sizeof(pDirent->d_name) + 16];
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| 266 | VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
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| 267 | DIR *pDir;
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| 268 | int fd = -1;
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| 269 |
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| 270 | if (pVBox->fdACPIDevices != -1 || pVBox->hACPIEventHandler != NULL)
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| 271 | FatalError("ACPI input file descriptor not initialised correctly.\n");
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| 272 | pDir = opendir("/dev/input");
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| 273 | if (pDir == NULL)
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| 274 | return;
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| 275 | memcpy(szFile, s_szDevInput, sizeof(s_szDevInput));
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| 276 | for (pDirent = readdir(pDir); pDirent != NULL; pDirent = readdir(pDir))
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| 277 | {
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| 278 | if (strncmp(pDirent->d_name, "event", sizeof("event") - 1) == 0)
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| 279 | {
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| 280 | #define BITS_PER_BLOCK (sizeof(unsigned long) * 8)
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| 281 | char szDevice[64] = "";
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| 282 | unsigned long afKeys[KEY_MAX / BITS_PER_BLOCK];
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| 283 | size_t const cchName = strlen(pDirent->d_name);
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| 284 | if (cchName + sizeof(s_szDevInput) > sizeof(szFile))
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| 285 | continue;
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| 286 | memcpy(&szFile[sizeof(s_szDevInput) - 1], pDirent->d_name, cchName + 1);
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| 287 | if (fd != -1)
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| 288 | close(fd);
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| 289 | fd = open(szFile, O_RDONLY | O_NONBLOCK);
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| 290 | if ( fd == -1
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| 291 | || ioctl(fd, EVIOCGNAME(sizeof(szDevice)), szDevice) == -1
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| 292 | || strcmp(szDevice, "Video Bus") != 0)
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| 293 | continue;
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| 294 | if ( ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(afKeys)), afKeys) == -1
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| 295 | || (( afKeys[KEY_SWITCHVIDEOMODE / BITS_PER_BLOCK]
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| 296 | >> KEY_SWITCHVIDEOMODE % BITS_PER_BLOCK) & 1) == 0)
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| 297 | break;
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| 298 | if (ioctl(fd, EVIOCGRAB, (void *)1) != 0)
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| 299 | break;
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| 300 | pVBox->hACPIEventHandler
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| 301 | = xf86AddGeneralHandler(fd, acpiEventHandler, pScreen);
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| 302 | if (pVBox->hACPIEventHandler == NULL)
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| 303 | break;
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| 304 | pVBox->fdACPIDevices = fd;
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| 305 | fd = -1;
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| 306 | break;
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| 307 | #undef BITS_PER_BLOCK
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| 308 | }
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| 309 | }
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| 310 | if (fd != -1)
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| 311 | close(fd);
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| 312 | closedir(pDir);
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| 313 | }
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| 314 |
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| 315 | void vbvxCleanUpLinuxACPI(ScreenPtr pScreen)
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| 316 | {
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| 317 | VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
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| 318 | if (pVBox->fdACPIDevices != -1)
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| 319 | close(pVBox->fdACPIDevices);
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| 320 | pVBox->fdACPIDevices = -1;
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| 321 | xf86RemoveGeneralHandler(pVBox->hACPIEventHandler);
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| 322 | pVBox->hACPIEventHandler = NULL;
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| 323 | }
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| 324 | # endif /* RT_OS_LINUX */
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| 325 | #endif /* VBOXVIDEO_13 */
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