| 1 | /* $Id: display-svga.cpp 81052 2019-09-27 12:44:45Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * X11 guest client - VMSVGA emulation resize event pass-through to drm guest
|
|---|
| 4 | * driver.
|
|---|
| 5 | */
|
|---|
| 6 |
|
|---|
| 7 | /*
|
|---|
| 8 | * Copyright (C) 2016-2019 Oracle Corporation
|
|---|
| 9 | *
|
|---|
| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 11 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 12 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 13 | * General Public License (GPL) as published by the Free Software
|
|---|
| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 17 | */
|
|---|
| 18 |
|
|---|
| 19 | /*
|
|---|
| 20 | * Known things to test when changing this code. All assume a guest with VMSVGA
|
|---|
| 21 | * active and controlled by X11 or Wayland, and Guest Additions installed and
|
|---|
| 22 | * running, unless otherwise stated.
|
|---|
| 23 | * - On Linux 4.6 and later guests, VBoxClient --vmsvga should be running as
|
|---|
| 24 | * root and not as the logged-in user. Dynamic resizing should work for all
|
|---|
| 25 | * screens in any environment which handles kernel resize notifications,
|
|---|
| 26 | * including at log-in screens. Test GNOME Shell Wayland and GNOME Shell
|
|---|
| 27 | * under X.Org or Unity or KDE at the log-in screen and after log-in.
|
|---|
| 28 | * - Linux 4.10 changed the user-kernel-ABI introduced in 4.6: test both.
|
|---|
| 29 | * - On other guests (than Linux 4.6 or later) running X.Org Server 1.3 or
|
|---|
| 30 | * later, VBoxClient --vmsvga should never be running as root, and should run
|
|---|
| 31 | * (and dynamic resizing and screen enable/disable should work for all
|
|---|
| 32 | * screens) whenever a user is logged in to a supported desktop environment.
|
|---|
| 33 | * - On guests running X.Org Server 1.2 or older, VBoxClient --vmsvga should
|
|---|
| 34 | * never run as root and should run whenever a user is logged in to a
|
|---|
| 35 | * supported desktop environment. Dynamic resizing should work for the first
|
|---|
| 36 | * screen, and enabling others should not be possible.
|
|---|
| 37 | * - When VMSVGA is not enabled, VBoxClient --vmsvga should never stay running.
|
|---|
| 38 | */
|
|---|
| 39 |
|
|---|
| 40 | #include "VBoxClient.h"
|
|---|
| 41 |
|
|---|
| 42 | #include <VBox/VBoxGuestLib.h>
|
|---|
| 43 |
|
|---|
| 44 | #include <iprt/assert.h>
|
|---|
| 45 | #include <iprt/file.h>
|
|---|
| 46 | #include <iprt/err.h>
|
|---|
| 47 | #include <iprt/string.h>
|
|---|
| 48 |
|
|---|
| 49 | #include <stdio.h>
|
|---|
| 50 |
|
|---|
| 51 | /** Maximum number of supported screens. DRM and X11 both limit this to 32. */
|
|---|
| 52 | /** @todo if this ever changes, dynamically allocate resizeable arrays in the
|
|---|
| 53 | * context structure. */
|
|---|
| 54 | #define VMW_MAX_HEADS 32
|
|---|
| 55 |
|
|---|
| 56 | /* VMWare kernel driver control parts definitions. */
|
|---|
| 57 |
|
|---|
| 58 | #ifdef RT_OS_LINUX
|
|---|
| 59 | # include <sys/ioctl.h>
|
|---|
| 60 | #else /* Solaris and BSDs, in case they ever adopt the DRM driver. */
|
|---|
| 61 | # include <sys/ioccom.h>
|
|---|
| 62 | #endif
|
|---|
| 63 |
|
|---|
| 64 | #define DRM_DRIVER_NAME "vmwgfx"
|
|---|
| 65 |
|
|---|
| 66 | /** DRM version structure. */
|
|---|
| 67 | struct DRMVERSION
|
|---|
| 68 | {
|
|---|
| 69 | int cMajor;
|
|---|
| 70 | int cMinor;
|
|---|
| 71 | int cPatchLevel;
|
|---|
| 72 | size_t cbName;
|
|---|
| 73 | char *pszName;
|
|---|
| 74 | size_t cbDate;
|
|---|
| 75 | char *pszDate;
|
|---|
| 76 | size_t cbDescription;
|
|---|
| 77 | char *pszDescription;
|
|---|
| 78 | };
|
|---|
| 79 | AssertCompileSize(struct DRMVERSION, 8 + 7 * sizeof(void *));
|
|---|
| 80 |
|
|---|
| 81 | /** Rectangle structure for geometry of a single screen. */
|
|---|
| 82 | struct DRMVMWRECT
|
|---|
| 83 | {
|
|---|
| 84 | int32_t x;
|
|---|
| 85 | int32_t y;
|
|---|
| 86 | uint32_t w;
|
|---|
| 87 | uint32_t h;
|
|---|
| 88 | };
|
|---|
| 89 | AssertCompileSize(struct DRMVMWRECT, 16);
|
|---|
| 90 |
|
|---|
| 91 | #define DRM_IOCTL_VERSION _IOWR('d', 0x00, struct DRMVERSION)
|
|---|
| 92 |
|
|---|
| 93 | struct DRMCONTEXT
|
|---|
| 94 | {
|
|---|
| 95 | RTFILE hDevice;
|
|---|
| 96 | };
|
|---|
| 97 |
|
|---|
| 98 | static void drmConnect(struct DRMCONTEXT *pContext)
|
|---|
| 99 | {
|
|---|
| 100 | unsigned i;
|
|---|
| 101 | RTFILE hDevice;
|
|---|
| 102 |
|
|---|
| 103 | if (pContext->hDevice != NIL_RTFILE)
|
|---|
| 104 | VBClLogFatalError("%s called with bad argument\n", __func__);
|
|---|
| 105 | /* Try to open the SVGA DRM device. */
|
|---|
| 106 | for (i = 0; i < 128; ++i)
|
|---|
| 107 | {
|
|---|
| 108 | char szPath[64];
|
|---|
| 109 | struct DRMVERSION version;
|
|---|
| 110 | char szName[sizeof(DRM_DRIVER_NAME)];
|
|---|
| 111 | int rc;
|
|---|
| 112 |
|
|---|
| 113 | /* Control devices for drm graphics driver control devices go from
|
|---|
| 114 | * controlD64 to controlD127. Render node devices go from renderD128
|
|---|
| 115 | * to renderD192. The driver takes resize hints via the control device
|
|---|
| 116 | * on pre-4.10 kernels and on the render device on newer ones. Try
|
|---|
| 117 | * both types. */
|
|---|
| 118 | if (i % 2 == 0)
|
|---|
| 119 | rc = RTStrPrintf(szPath, sizeof(szPath), "/dev/dri/renderD%u", i / 2 + 128);
|
|---|
| 120 | else
|
|---|
| 121 | rc = RTStrPrintf(szPath, sizeof(szPath), "/dev/dri/controlD%u", i / 2 + 64);
|
|---|
| 122 | if (RT_FAILURE(rc))
|
|---|
| 123 | VBClLogFatalError("RTStrPrintf of device path failed, rc=%Rrc\n", rc);
|
|---|
| 124 | rc = RTFileOpen(&hDevice, szPath, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
|
|---|
| 125 | if (RT_FAILURE(rc))
|
|---|
| 126 | continue;
|
|---|
| 127 | RT_ZERO(version);
|
|---|
| 128 | version.cbName = sizeof(szName);
|
|---|
| 129 | version.pszName = szName;
|
|---|
| 130 | rc = RTFileIoCtl(hDevice, DRM_IOCTL_VERSION, &version, sizeof(version), NULL);
|
|---|
| 131 | if ( RT_SUCCESS(rc)
|
|---|
| 132 | && !strncmp(szName, DRM_DRIVER_NAME, sizeof(DRM_DRIVER_NAME) - 1)
|
|---|
| 133 | && ( version.cMajor > 2
|
|---|
| 134 | || (version.cMajor == 2 && version.cMinor > 9)))
|
|---|
| 135 | break;
|
|---|
| 136 | hDevice = NIL_RTFILE;
|
|---|
| 137 | }
|
|---|
| 138 | pContext->hDevice = hDevice;
|
|---|
| 139 | }
|
|---|
| 140 |
|
|---|
| 141 | /** Preferred screen layout information for DRM_VMW_UPDATE_LAYOUT IoCtl. The
|
|---|
| 142 | * rects argument is a cast pointer to an array of drm_vmw_rect. */
|
|---|
| 143 | struct DRMVMWUPDATELAYOUT {
|
|---|
| 144 | uint32_t cOutputs;
|
|---|
| 145 | uint32_t u32Pad;
|
|---|
| 146 | uint64_t ptrRects;
|
|---|
| 147 | };
|
|---|
| 148 | AssertCompileSize(struct DRMVMWUPDATELAYOUT, 16);
|
|---|
| 149 |
|
|---|
| 150 | #define DRM_IOCTL_VMW_UPDATE_LAYOUT \
|
|---|
| 151 | _IOW('d', 0x40 + 20, struct DRMVMWUPDATELAYOUT)
|
|---|
| 152 |
|
|---|
| 153 | static void drmSendHints(struct DRMCONTEXT *pContext, struct DRMVMWRECT *paRects,
|
|---|
| 154 | unsigned cHeads)
|
|---|
| 155 | {
|
|---|
| 156 | int rc;
|
|---|
| 157 | struct DRMVMWUPDATELAYOUT ioctlLayout;
|
|---|
| 158 |
|
|---|
| 159 | if (pContext->hDevice == NIL_RTFILE)
|
|---|
| 160 | VBClLogFatalError("%s bad device argument\n", __func__);
|
|---|
| 161 | ioctlLayout.cOutputs = cHeads;
|
|---|
| 162 | ioctlLayout.ptrRects = (uint64_t)paRects;
|
|---|
| 163 | rc = RTFileIoCtl(pContext->hDevice, DRM_IOCTL_VMW_UPDATE_LAYOUT,
|
|---|
| 164 | &ioctlLayout, sizeof(ioctlLayout), NULL);
|
|---|
| 165 | if (RT_FAILURE(rc) && rc != VERR_INVALID_PARAMETER)
|
|---|
| 166 | VBClLogFatalError("Failure updating layout, rc=%Rrc\n", rc);
|
|---|
| 167 | }
|
|---|
| 168 |
|
|---|
| 169 | static const char *getName()
|
|---|
| 170 | {
|
|---|
| 171 | return "Display SVGA";
|
|---|
| 172 | }
|
|---|
| 173 |
|
|---|
| 174 | static const char *getPidFilePath()
|
|---|
| 175 | {
|
|---|
| 176 | return ".vboxclient-display-svga.pid";
|
|---|
| 177 | }
|
|---|
| 178 |
|
|---|
| 179 | static int run(struct VBCLSERVICE **ppInterface, bool fDaemonised)
|
|---|
| 180 | {
|
|---|
| 181 | (void)ppInterface;
|
|---|
| 182 | (void)fDaemonised;
|
|---|
| 183 | struct DRMCONTEXT drmContext = { NIL_RTFILE };
|
|---|
| 184 | unsigned i;
|
|---|
| 185 | int rc;
|
|---|
| 186 | struct DRMVMWRECT aRects[VMW_MAX_HEADS];
|
|---|
| 187 | unsigned cHeads;
|
|---|
| 188 | /* Do not acknowledge the first event we query for to pick up old events,
|
|---|
| 189 | * e.g. from before a guest reboot. */
|
|---|
| 190 | bool fAck = false;
|
|---|
| 191 |
|
|---|
| 192 | drmConnect(&drmContext);
|
|---|
| 193 | if (drmContext.hDevice == NIL_RTFILE)
|
|---|
| 194 | return VINF_SUCCESS;
|
|---|
| 195 | rc = VbglR3CtlFilterMask(VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST, 0);
|
|---|
| 196 | if (RT_FAILURE(rc))
|
|---|
| 197 | VBClLogFatalError("Failed to request display change events, rc=%Rrc\n", rc);
|
|---|
| 198 | rc = VbglR3AcquireGuestCaps(VMMDEV_GUEST_SUPPORTS_GRAPHICS, 0, false);
|
|---|
| 199 | if (rc == VERR_RESOURCE_BUSY) /* Someone else has already acquired it. */
|
|---|
| 200 | return VINF_SUCCESS;
|
|---|
| 201 | if (RT_FAILURE(rc))
|
|---|
| 202 | VBClLogFatalError("Failed to register resizing support, rc=%Rrc\n", rc);
|
|---|
| 203 | for (;;)
|
|---|
| 204 | {
|
|---|
| 205 | uint32_t events;
|
|---|
| 206 | struct VMMDevDisplayDef aDisplays[VMW_MAX_HEADS];
|
|---|
| 207 | uint32_t cDisplaysOut;
|
|---|
| 208 |
|
|---|
| 209 | /* Query the first size without waiting. This lets us e.g. pick up
|
|---|
| 210 | * the last event before a guest reboot when we start again after. */
|
|---|
| 211 | rc = VbglR3GetDisplayChangeRequestMulti(VMW_MAX_HEADS, &cDisplaysOut, aDisplays, fAck);
|
|---|
| 212 | fAck = true;
|
|---|
| 213 | if (RT_FAILURE(rc))
|
|---|
| 214 | VBClLogFatalError("Failed to get display change request, rc=%Rrc\n", rc);
|
|---|
| 215 | if (cDisplaysOut > VMW_MAX_HEADS)
|
|---|
| 216 | VBClLogFatalError("Display change request contained, rc=%Rrc\n", rc);
|
|---|
| 217 | for (i = 0, cHeads = 0; i < cDisplaysOut && i < VMW_MAX_HEADS; ++i)
|
|---|
| 218 | {
|
|---|
| 219 | if (!(aDisplays[i].fDisplayFlags & VMMDEV_DISPLAY_DISABLED))
|
|---|
| 220 | {
|
|---|
| 221 | if ((i == 0) || (aDisplays[i].fDisplayFlags & VMMDEV_DISPLAY_ORIGIN))
|
|---|
| 222 | {
|
|---|
| 223 | aRects[cHeads].x = aDisplays[i].xOrigin;
|
|---|
| 224 | aRects[cHeads].y = aDisplays[i].yOrigin;
|
|---|
| 225 | } else {
|
|---|
| 226 | aRects[cHeads].x = aRects[cHeads - 1].x + aRects[cHeads - 1].w;
|
|---|
| 227 | aRects[cHeads].y = aRects[cHeads - 1].y;
|
|---|
| 228 | }
|
|---|
| 229 | aRects[cHeads].w = aDisplays[i].cx;
|
|---|
| 230 | aRects[cHeads].h = aDisplays[i].cy;
|
|---|
| 231 | ++cHeads;
|
|---|
| 232 | }
|
|---|
| 233 | }
|
|---|
| 234 | for (i = 0; i < cHeads; ++i)
|
|---|
| 235 | printf("Head %u: %dx%d, (%d, %d)\n", i, (int)aRects[i].w, (int)aRects[i].h,
|
|---|
| 236 | (int)aRects[i].x, (int)aRects[i].y);
|
|---|
| 237 | drmSendHints(&drmContext, aRects, cHeads);
|
|---|
| 238 | rc = VbglR3WaitEvent(VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST, RT_INDEFINITE_WAIT, &events);
|
|---|
| 239 | if (RT_FAILURE(rc))
|
|---|
| 240 | VBClLogFatalError("Failure waiting for event, rc=%Rrc\n", rc);
|
|---|
| 241 | }
|
|---|
| 242 | }
|
|---|
| 243 |
|
|---|
| 244 | static struct VBCLSERVICE interface =
|
|---|
| 245 | {
|
|---|
| 246 | getName,
|
|---|
| 247 | getPidFilePath,
|
|---|
| 248 | VBClServiceDefaultHandler, /* Init */
|
|---|
| 249 | run,
|
|---|
| 250 | VBClServiceDefaultCleanup
|
|---|
| 251 | }, *pInterface = &interface;
|
|---|
| 252 |
|
|---|
| 253 | struct VBCLSERVICE **VBClDisplaySVGAService()
|
|---|
| 254 | {
|
|---|
| 255 | return &pInterface;
|
|---|
| 256 | }
|
|---|
