/* $Id: Modesetting.cpp 38929 2011-10-02 21:55:57Z vboxsync $ */ /** @file * VirtualBox Video driver, common code - HGSMI initialisation and helper * functions. */ /* * Copyright (C) 2006-2011 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 #include #include #include #include #include #include /** * Gets the count of virtual monitors attached to the guest via an HGSMI * command * * @returns the right count on success or 1 on failure. * @param pCtx the context containing the heap to use */ RTDECL(uint32_t) VBoxHGSMIGetMonitorCount(PHGSMIGUESTCOMMANDCONTEXT pCtx) { /* Query the configured number of displays. */ uint32_t cDisplays = 0; VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_MONITOR_COUNT, &cDisplays); LogFunc(("cDisplays = %d\n", cDisplays)); if (cDisplays == 0 || cDisplays > VBOX_VIDEO_MAX_SCREENS) /* Host reported some bad value. Continue in the 1 screen mode. */ cDisplays = 1; return cDisplays; } /** * Returns the size of the video RAM in bytes. * * @returns the size */ RTDECL(uint32_t) VBoxVideoGetVRAMSize(void) { /** @note A 32bit read on this port returns the VRAM size. */ return VBoxVideoCmnPortReadUlong(VBE_DISPI_IOPORT_DATA); } /** * Check whether this hardware allows the display width to have non-multiple- * of-eight values. * * @returns true if any width is allowed, false otherwise. */ RTDECL(bool) VBoxVideoAnyWidthAllowed(void) { unsigned DispiId; VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_ANYX); DispiId = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); return (DispiId == VBE_DISPI_ID_ANYX); } /** * Tell the host about how VRAM is divided up between each screen via an HGSMI * command. It is acceptable to specifiy identical data for each screen if * they share a single framebuffer. * * @returns iprt status code, either VERR_NO_MEMORY or the status returned by * @a pfnFill * @todo What was I thinking of with that callback function? It * would be much simpler to just pass in a structure in normal * memory and copy it. * @param pCtx the context containing the heap to use * @param u32Count the number of screens we are activating * @param pfnFill a callback which initialises the VBVAINFOVIEW structures * for all screens * @param pvData context data for @a pfnFill */ RTDECL(int) VBoxHGSMISendViewInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx, uint32_t u32Count, PFNHGSMIFILLVIEWINFO pfnFill, void *pvData) { int rc; /* Issue the screen info command. */ void *p = VBoxHGSMIBufferAlloc(pCtx, sizeof(VBVAINFOVIEW) * u32Count, HGSMI_CH_VBVA, VBVA_INFO_VIEW); if (p) { VBVAINFOVIEW *pInfo = (VBVAINFOVIEW *)p; rc = pfnFill(pvData, pInfo, u32Count); if (RT_SUCCESS(rc)) VBoxHGSMIBufferSubmit (pCtx, p); VBoxHGSMIBufferFree(pCtx, p); } else rc = VERR_NO_MEMORY; return rc; } /** * Set a video mode using port registers. This must be done for the first * screen before every HGSMI modeset and also works when HGSM is not enabled. * @param cWidth the mode width * @param cHeight the mode height * @param cVirtWidth the mode pitch * @param cBPP the colour depth of the mode * @param fFlags flags for the mode. These will be or-ed with the * default _ENABLED flag, so unless you are restoring * a saved mode or have special requirements you can pass * zero here. * @param cx the horizontal panning offset * @param cy the vertical panning offset */ RTDECL(void) VBoxVideoSetModeRegisters(uint16_t cWidth, uint16_t cHeight, uint16_t cVirtWidth, uint16_t cBPP, uint16_t fFlags, uint16_t cx, uint16_t cy) { /* set the mode characteristics */ VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_XRES); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cWidth); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_YRES); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cHeight); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_VIRT_WIDTH); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cVirtWidth); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_BPP); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cBPP); /* enable the mode */ VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ENABLE); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, fFlags | VBE_DISPI_ENABLED); /* Panning registers */ VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_X_OFFSET); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cx); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_Y_OFFSET); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cy); /** @todo read from the port to see if the mode switch was successful */ } /** * Get the video mode for the first screen using the port registers. All * parameters are optional * @returns true if the VBE mode returned is active, false if we are in VGA * mode * @note If anyone else needs additional register values just extend the * function with additional parameters and fix any existing callers. * @param pcWidth where to store the mode width * @param pcHeight where to store the mode height * @param pcVirtWidth where to store the mode pitch * @param pcBPP where to store the colour depth of the mode * @param pfFlags where to store the flags for the mode */ RTDECL(bool) VBoxVideoGetModeRegisters(uint16_t *pcWidth, uint16_t *pcHeight, uint16_t *pcVirtWidth, uint16_t *pcBPP, uint16_t *pfFlags) { uint16_t fFlags; VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ENABLE); fFlags = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); if (pcWidth) { VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_XRES); *pcWidth = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); } if (pcHeight) { VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_YRES); *pcHeight = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); } if (pcVirtWidth) { VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_VIRT_WIDTH); *pcVirtWidth = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); } if (pcBPP) { VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_BPP); *pcBPP = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA); } if (pfFlags) *pfFlags = fFlags; return RT_BOOL(fFlags & VBE_DISPI_ENABLED); } /** * Disable our extended graphics mode and go back to VGA mode. */ RTDECL(void) VBoxVideoDisableVBE(void) { VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ENABLE); VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, 0); } /** * Set a video mode via an HGSMI request. The views must have been * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being * set on the first display then it must be set first using registers. * @param cDisplay the screen number * @param cOriginX the horizontal displacement relative to the first screen * @param cOriginY the vertical displacement relative to the first screen * @param offStart the offset of the visible area of the framebuffer * relative to the framebuffer start * @param cbPitch the offset in bytes between the starts of two adjecent * scan lines in video RAM * @param cWidth the mode width * @param cHeight the mode height * @param cBPP the colour depth of the mode */ RTDECL(void) VBoxHGSMIProcessDisplayInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx, uint32_t cDisplay, int32_t cOriginX, int32_t cOriginY, uint32_t offStart, uint32_t cbPitch, uint32_t cWidth, uint32_t cHeight, uint16_t cBPP, uint16_t fFlags) { /* Issue the screen info command. */ void *p = VBoxHGSMIBufferAlloc(pCtx, sizeof (VBVAINFOSCREEN), HGSMI_CH_VBVA, VBVA_INFO_SCREEN); if (!p) { LogFunc(("HGSMIHeapAlloc failed\n")); } else { VBVAINFOSCREEN *pScreen = (VBVAINFOSCREEN *)p; pScreen->u32ViewIndex = cDisplay; pScreen->i32OriginX = cOriginX; pScreen->i32OriginY = cOriginY; pScreen->u32StartOffset = offStart; pScreen->u32LineSize = cbPitch; pScreen->u32Width = cWidth; pScreen->u32Height = cHeight; pScreen->u16BitsPerPixel = cBPP; pScreen->u16Flags = fFlags; VBoxHGSMIBufferSubmit(pCtx, p); VBoxHGSMIBufferFree(pCtx, p); } }