| 1 | /* $Id: Modesetting.cpp 35150 2010-12-15 16:33:59Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VirtualBox Video driver, common code - HGSMI initialisation and helper
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| 4 | * functions.
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006-2010 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 | #include <VBox/VBoxVideoGuest.h>
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| 20 | #include <VBox/VBoxVideo.h>
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| 21 | #include <VBox/VBoxGuest.h>
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| 22 | #include <VBox/Hardware/VBoxVideoVBE.h>
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| 23 | #include <VBox/VMMDev.h>
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| 24 |
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| 25 | #include <iprt/asm.h>
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| 26 | #include <iprt/log.h>
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| 27 |
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| 28 | /**
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| 29 | * Gets the count of virtual monitors attached to the guest via an HGSMI
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| 30 | * command
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| 31 | *
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| 32 | * @returns the right count on success or 1 on failure.
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| 33 | * @param pCtx the context containing the heap to use
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| 34 | */
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| 35 | RTDECL(uint32_t) VBoxHGSMIGetMonitorCount(PHGSMIGUESTCOMMANDCONTEXT pCtx)
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| 36 | {
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| 37 | /* Query the configured number of displays. */
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| 38 | uint32_t cDisplays = 0;
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| 39 | VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_MONITOR_COUNT, &cDisplays);
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| 40 | LogFunc(("cDisplays = %d\n", cDisplays));
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| 41 | if (cDisplays == 0 || cDisplays > VBOX_VIDEO_MAX_SCREENS)
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| 42 | /* Host reported some bad value. Continue in the 1 screen mode. */
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| 43 | cDisplays = 1;
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| 44 | return cDisplays;
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| 45 | }
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Tell the host about how VRAM is divided up between each screen via an HGSMI
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| 50 | * command. It is acceptable to specifiy identical data for each screen if
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| 51 | * they share a single framebuffer.
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| 52 | *
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| 53 | * @returns iprt status code, either VERR_NO_MEMORY or the status returned by
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| 54 | * @a pfnFill
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| 55 | * @param pCtx the context containing the heap to use
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| 56 | * @param u32Count the number of screens we are activating
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| 57 | * @param pfnFill a callback which initialises the VBVAINFOVIEW structures
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| 58 | * for all screens
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| 59 | * @param pvData context data for @a pfnFill
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| 60 | */
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| 61 | RTDECL(int) VBoxHGSMISendViewInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
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| 62 | uint32_t u32Count,
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| 63 | PFNHGSMIFILLVIEWINFO pfnFill,
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| 64 | void *pvData)
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| 65 | {
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| 66 | int rc;
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| 67 | /* Issue the screen info command. */
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| 68 | void *p = VBoxHGSMIBufferAlloc(pCtx, sizeof(VBVAINFOVIEW) * u32Count,
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| 69 | HGSMI_CH_VBVA, VBVA_INFO_VIEW);
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| 70 | if (p)
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| 71 | {
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| 72 | VBVAINFOVIEW *pInfo = (VBVAINFOVIEW *)p;
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| 73 | rc = pfnFill(pvData, pInfo, u32Count);
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| 74 | if (RT_SUCCESS(rc))
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| 75 | VBoxHGSMIBufferSubmit (pCtx, p);
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| 76 | VBoxHGSMIBufferFree(pCtx, p);
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| 77 | }
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| 78 | else
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| 79 | rc = VERR_NO_MEMORY;
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| 80 | return rc;
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| 81 | }
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| 82 |
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| 83 |
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| 84 | /**
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| 85 | * Set a video mode using port registers. This must be done for the first
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| 86 | * screen before every HGSMI modeset and also works when HGSM is not enabled.
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| 87 | * @param cWidth the mode width
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| 88 | * @param cHeight the mode height
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| 89 | * @param cBPP the colour depth of the mode
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| 90 | * @param cx the horizontal panning offset
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| 91 | * @param cy the vertical panning offset
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| 92 | */
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| 93 | RTDECL(void) VBoxVideoSetModeRegisters(uint16_t cWidth, uint16_t cHeight,
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| 94 | uint16_t cVirtWidth, uint16_t cBPP,
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| 95 | uint16_t cx, uint16_t cy)
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| 96 | {
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| 97 | /* set the mode characteristics */
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| 98 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_XRES);
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| 99 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cWidth);
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| 100 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_YRES);
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| 101 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cHeight);
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| 102 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_VIRT_WIDTH);
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| 103 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cVirtWidth);
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| 104 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_BPP);
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| 105 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cBPP);
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| 106 | /* enable the mode */
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| 107 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ENABLE);
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| 108 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
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| 109 | /* Panning registers */
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| 110 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_X_OFFSET);
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| 111 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cx);
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| 112 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_Y_OFFSET);
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| 113 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cy);
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| 114 | /** @todo read from the port to see if the mode switch was successful */
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| 115 | }
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| 116 |
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| 117 |
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| 118 | /**
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| 119 | * Set a video mode via an HGSMI request. The views must have been
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| 120 | * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
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| 121 | * set on the first display then it must be set first using registers.
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| 122 | * @param cDisplay the screen number
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| 123 | * @param cOriginX the horizontal displacement relative to the first screen
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| 124 | * @param cOriginY the vertical displacement relative to the first screen
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| 125 | * @param offStart the offset of the visible area of the framebuffer
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| 126 | * relative to the framebuffer start
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| 127 | * @param cbPitch the offset in bytes between the starts of two adjecent
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| 128 | * scan lines in video RAM
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| 129 | * @param cWidth the mode width
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| 130 | * @param cHeight the mode height
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| 131 | * @param cBPP the colour depth of the mode
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| 132 | */
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| 133 | RTDECL(void) VBoxHGSMIProcessDisplayInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
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| 134 | uint32_t cDisplay,
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| 135 | int32_t cOriginX,
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| 136 | int32_t cOriginY,
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| 137 | uint32_t offStart,
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| 138 | uint32_t cbPitch,
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| 139 | uint32_t cWidth,
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| 140 | uint32_t cHeight,
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| 141 | uint16_t cBPP,
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| 142 | uint16_t fFlags)
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| 143 | {
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| 144 | /* Issue the screen info command. */
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| 145 | void *p = VBoxHGSMIBufferAlloc(pCtx,
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| 146 | sizeof (VBVAINFOSCREEN),
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| 147 | HGSMI_CH_VBVA,
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| 148 | VBVA_INFO_SCREEN);
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| 149 | if (!p)
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| 150 | {
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| 151 | LogFunc(("HGSMIHeapAlloc failed\n"));
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| 152 | }
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| 153 | else
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| 154 | {
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| 155 | VBVAINFOSCREEN *pScreen = (VBVAINFOSCREEN *)p;
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| 156 |
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| 157 | pScreen->u32ViewIndex = cDisplay;
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| 158 | pScreen->i32OriginX = cOriginX;
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| 159 | pScreen->i32OriginY = cOriginY;
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| 160 | pScreen->u32StartOffset = offStart;
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| 161 | pScreen->u32LineSize = cbPitch;
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| 162 | pScreen->u32Width = cWidth;
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| 163 | pScreen->u32Height = cHeight;
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| 164 | pScreen->u16BitsPerPixel = cBPP;
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| 165 | pScreen->u16Flags = fFlags;
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| 166 |
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| 167 | VBoxHGSMIBufferSubmit(pCtx, p);
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| 168 |
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| 169 | VBoxHGSMIBufferFree(pCtx, p);
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| 170 | }
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| 171 | }
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