| 1 | /* $Id: Modesetting.cpp 38929 2011-10-02 21:55:57Z 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) 2006-2011 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 | * Returns the size of the video RAM in bytes.
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| 50 | *
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| 51 | * @returns the size
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| 52 | */
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| 53 | RTDECL(uint32_t) VBoxVideoGetVRAMSize(void)
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| 54 | {
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| 55 | /** @note A 32bit read on this port returns the VRAM size. */
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| 56 | return VBoxVideoCmnPortReadUlong(VBE_DISPI_IOPORT_DATA);
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| 57 | }
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| 58 |
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| 59 |
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| 60 | /**
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| 61 | * Check whether this hardware allows the display width to have non-multiple-
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| 62 | * of-eight values.
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| 63 | *
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| 64 | * @returns true if any width is allowed, false otherwise.
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| 65 | */
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| 66 | RTDECL(bool) VBoxVideoAnyWidthAllowed(void)
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| 67 | {
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| 68 | unsigned DispiId;
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| 69 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID);
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| 70 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_ANYX);
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| 71 | DispiId = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 72 | return (DispiId == VBE_DISPI_ID_ANYX);
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| 73 | }
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| 74 |
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| 75 |
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| 76 | /**
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| 77 | * Tell the host about how VRAM is divided up between each screen via an HGSMI
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| 78 | * command. It is acceptable to specifiy identical data for each screen if
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| 79 | * they share a single framebuffer.
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| 80 | *
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| 81 | * @returns iprt status code, either VERR_NO_MEMORY or the status returned by
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| 82 | * @a pfnFill
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| 83 | * @todo What was I thinking of with that callback function? It
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| 84 | * would be much simpler to just pass in a structure in normal
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| 85 | * memory and copy it.
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| 86 | * @param pCtx the context containing the heap to use
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| 87 | * @param u32Count the number of screens we are activating
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| 88 | * @param pfnFill a callback which initialises the VBVAINFOVIEW structures
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| 89 | * for all screens
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| 90 | * @param pvData context data for @a pfnFill
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| 91 | */
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| 92 | RTDECL(int) VBoxHGSMISendViewInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
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| 93 | uint32_t u32Count,
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| 94 | PFNHGSMIFILLVIEWINFO pfnFill,
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| 95 | void *pvData)
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| 96 | {
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| 97 | int rc;
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| 98 | /* Issue the screen info command. */
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| 99 | void *p = VBoxHGSMIBufferAlloc(pCtx, sizeof(VBVAINFOVIEW) * u32Count,
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| 100 | HGSMI_CH_VBVA, VBVA_INFO_VIEW);
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| 101 | if (p)
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| 102 | {
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| 103 | VBVAINFOVIEW *pInfo = (VBVAINFOVIEW *)p;
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| 104 | rc = pfnFill(pvData, pInfo, u32Count);
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| 105 | if (RT_SUCCESS(rc))
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| 106 | VBoxHGSMIBufferSubmit (pCtx, p);
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| 107 | VBoxHGSMIBufferFree(pCtx, p);
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| 108 | }
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| 109 | else
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| 110 | rc = VERR_NO_MEMORY;
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| 111 | return rc;
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| 112 | }
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| 113 |
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| 114 |
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| 115 | /**
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| 116 | * Set a video mode using port registers. This must be done for the first
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| 117 | * screen before every HGSMI modeset and also works when HGSM is not enabled.
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| 118 | * @param cWidth the mode width
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| 119 | * @param cHeight the mode height
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| 120 | * @param cVirtWidth the mode pitch
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| 121 | * @param cBPP the colour depth of the mode
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| 122 | * @param fFlags flags for the mode. These will be or-ed with the
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| 123 | * default _ENABLED flag, so unless you are restoring
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| 124 | * a saved mode or have special requirements you can pass
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| 125 | * zero here.
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| 126 | * @param cx the horizontal panning offset
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| 127 | * @param cy the vertical panning offset
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| 128 | */
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| 129 | RTDECL(void) VBoxVideoSetModeRegisters(uint16_t cWidth, uint16_t cHeight,
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| 130 | uint16_t cVirtWidth, uint16_t cBPP,
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| 131 | uint16_t fFlags, uint16_t cx,
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| 132 | uint16_t cy)
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| 133 | {
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| 134 | /* set the mode characteristics */
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| 135 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_XRES);
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| 136 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cWidth);
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| 137 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_YRES);
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| 138 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cHeight);
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| 139 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 140 | VBE_DISPI_INDEX_VIRT_WIDTH);
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| 141 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cVirtWidth);
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| 142 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_BPP);
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| 143 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cBPP);
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| 144 | /* enable the mode */
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| 145 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 146 | VBE_DISPI_INDEX_ENABLE);
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| 147 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA,
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| 148 | fFlags | VBE_DISPI_ENABLED);
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| 149 | /* Panning registers */
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| 150 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 151 | VBE_DISPI_INDEX_X_OFFSET);
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| 152 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cx);
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| 153 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 154 | VBE_DISPI_INDEX_Y_OFFSET);
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| 155 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, cy);
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| 156 | /** @todo read from the port to see if the mode switch was successful */
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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 | * Get the video mode for the first screen using the port registers. All
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| 162 | * parameters are optional
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| 163 | * @returns true if the VBE mode returned is active, false if we are in VGA
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| 164 | * mode
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| 165 | * @note If anyone else needs additional register values just extend the
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| 166 | * function with additional parameters and fix any existing callers.
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| 167 | * @param pcWidth where to store the mode width
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| 168 | * @param pcHeight where to store the mode height
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| 169 | * @param pcVirtWidth where to store the mode pitch
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| 170 | * @param pcBPP where to store the colour depth of the mode
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| 171 | * @param pfFlags where to store the flags for the mode
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| 172 | */
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| 173 | RTDECL(bool) VBoxVideoGetModeRegisters(uint16_t *pcWidth, uint16_t *pcHeight,
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| 174 | uint16_t *pcVirtWidth, uint16_t *pcBPP,
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| 175 | uint16_t *pfFlags)
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| 176 | {
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| 177 | uint16_t fFlags;
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| 178 |
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| 179 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 180 | VBE_DISPI_INDEX_ENABLE);
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| 181 | fFlags = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 182 | if (pcWidth)
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| 183 | {
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| 184 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 185 | VBE_DISPI_INDEX_XRES);
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| 186 | *pcWidth = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 187 | }
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| 188 | if (pcHeight)
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| 189 | {
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| 190 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 191 | VBE_DISPI_INDEX_YRES);
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| 192 | *pcHeight = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 193 | }
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| 194 | if (pcVirtWidth)
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| 195 | {
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| 196 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 197 | VBE_DISPI_INDEX_VIRT_WIDTH);
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| 198 | *pcVirtWidth = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 199 | }
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| 200 | if (pcBPP)
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| 201 | {
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| 202 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 203 | VBE_DISPI_INDEX_BPP);
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| 204 | *pcBPP = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
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| 205 | }
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| 206 | if (pfFlags)
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| 207 | *pfFlags = fFlags;
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| 208 | return RT_BOOL(fFlags & VBE_DISPI_ENABLED);
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| 209 | }
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| 210 |
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| 211 |
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| 212 | /**
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| 213 | * Disable our extended graphics mode and go back to VGA mode.
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| 214 | */
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| 215 | RTDECL(void) VBoxVideoDisableVBE(void)
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| 216 | {
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| 217 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX,
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| 218 | VBE_DISPI_INDEX_ENABLE);
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| 219 | VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, 0);
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| 220 | }
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| 221 |
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| 222 |
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| 223 | /**
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| 224 | * Set a video mode via an HGSMI request. The views must have been
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| 225 | * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
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| 226 | * set on the first display then it must be set first using registers.
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| 227 | * @param cDisplay the screen number
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| 228 | * @param cOriginX the horizontal displacement relative to the first screen
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| 229 | * @param cOriginY the vertical displacement relative to the first screen
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| 230 | * @param offStart the offset of the visible area of the framebuffer
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| 231 | * relative to the framebuffer start
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| 232 | * @param cbPitch the offset in bytes between the starts of two adjecent
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| 233 | * scan lines in video RAM
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| 234 | * @param cWidth the mode width
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| 235 | * @param cHeight the mode height
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| 236 | * @param cBPP the colour depth of the mode
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| 237 | */
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| 238 | RTDECL(void) VBoxHGSMIProcessDisplayInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
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| 239 | uint32_t cDisplay,
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| 240 | int32_t cOriginX,
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| 241 | int32_t cOriginY,
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| 242 | uint32_t offStart,
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| 243 | uint32_t cbPitch,
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| 244 | uint32_t cWidth,
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| 245 | uint32_t cHeight,
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| 246 | uint16_t cBPP,
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| 247 | uint16_t fFlags)
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| 248 | {
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| 249 | /* Issue the screen info command. */
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| 250 | void *p = VBoxHGSMIBufferAlloc(pCtx,
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| 251 | sizeof (VBVAINFOSCREEN),
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| 252 | HGSMI_CH_VBVA,
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| 253 | VBVA_INFO_SCREEN);
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| 254 | if (!p)
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| 255 | {
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| 256 | LogFunc(("HGSMIHeapAlloc failed\n"));
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| 257 | }
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| 258 | else
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| 259 | {
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| 260 | VBVAINFOSCREEN *pScreen = (VBVAINFOSCREEN *)p;
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| 261 |
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| 262 | pScreen->u32ViewIndex = cDisplay;
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| 263 | pScreen->i32OriginX = cOriginX;
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| 264 | pScreen->i32OriginY = cOriginY;
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| 265 | pScreen->u32StartOffset = offStart;
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| 266 | pScreen->u32LineSize = cbPitch;
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| 267 | pScreen->u32Width = cWidth;
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| 268 | pScreen->u32Height = cHeight;
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| 269 | pScreen->u16BitsPerPixel = cBPP;
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| 270 | pScreen->u16Flags = fFlags;
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| 271 |
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| 272 | VBoxHGSMIBufferSubmit(pCtx, p);
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| 273 |
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| 274 | VBoxHGSMIBufferFree(pCtx, p);
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| 275 | }
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| 276 | }
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