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+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atidga.c,v 1.9 2003/01/01 19:16:31 tsi Exp $ */
+/*
+ * Copyright 2000 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of Marc Aurele La France not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. Marc Aurele La France makes no representations
+ * about the suitability of this software for any purpose. It is provided
+ * "as-is" without express or implied warranty.
+ *
+ * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+ * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef AVOID_DGA
+
+#include "ati.h"
+#include "atiadjust.h"
+#include "atichip.h"
+#include "atidac.h"
+#include "atidga.h"
+#include "atiident.h"
+#include "atimode.h"
+#include "atistruct.h"
+
+#include "dgaproc.h"
+
+/*
+ * ATIDGAOpenFramebuffer --
+ *
+ * This function returns various framebuffer attributes to a DGA client.
+ */
+static Bool
+ATIDGAOpenFramebuffer
+(
+ ScrnInfoPtr pScreenInfo,
+ char **DeviceName,
+ unsigned char **ApertureBase,
+ int *ApertureSize,
+ int *ApertureOffset,
+ int *flags
+)
+{
+ ATIPtr pATI = ATIPTR(pScreenInfo);
+
+ *DeviceName = NULL; /* No special device */
+ *ApertureBase = (unsigned char *)(pATI->LinearBase);
+ *ApertureSize = pScreenInfo->videoRam * 1024;
+ *ApertureOffset = 0; /* Always */
+ *flags = 0; /* Root premissions OS-dependent */
+
+ return TRUE;
+}
+
+static int
+BitsSet
+(
+ unsigned long data
+)
+{
+ unsigned long mask = 1;
+ int set = 0;
+
+ for (; mask; mask <<= 1)
+ if (data & mask)
+ set++;
+
+ return set;
+}
+
+/*
+ * ATIDGASetMode --
+ *
+ * This function sets a graphics mode for a DGA client.
+ */
+static Bool
+ATIDGASetMode
+(
+ ScrnInfoPtr pScreenInfo,
+ DGAModePtr pDGAMode
+)
+{
+ ATIPtr pATI = ATIPTR(pScreenInfo);
+ DisplayModePtr pMode;
+ int iScreen = pScreenInfo->scrnIndex;
+ int frameX0, frameY0;
+
+ if (pDGAMode)
+ {
+ pMode = pDGAMode->mode;
+ pATI->depth = pDGAMode->depth;
+ pATI->bitsPerPixel = pDGAMode->bitsPerPixel;
+ pATI->displayWidth =
+ pDGAMode->bytesPerScanline * 8 / pATI->bitsPerPixel;
+ pATI->weight.red = BitsSet(pDGAMode->red_mask);
+ pATI->weight.green = BitsSet(pDGAMode->green_mask);
+ pATI->weight.blue = BitsSet(pDGAMode->blue_mask);
+ frameX0 = frameY0 = 0;
+ if (!pATI->currentMode)
+ pATI->currentMode = pScreenInfo->currentMode;
+ }
+ else
+ {
+ if (!(pMode = pATI->currentMode))
+ return TRUE;
+
+ pATI->depth = pScreenInfo->depth;
+ pATI->bitsPerPixel = pScreenInfo->bitsPerPixel;
+ pATI->displayWidth = pScreenInfo->displayWidth;
+ pATI->weight = pScreenInfo->weight;
+ frameX0 = pScreenInfo->frameX0;
+ frameY0 = pScreenInfo->frameY0;
+ }
+
+ pATI->XModifier = pATI->bitsPerPixel / UnitOf(pATI->bitsPerPixel);
+ ATIAdjustPreInit(pATI);
+ ATIModePreInit(pScreenInfo, pATI, &pATI->NewHW);
+
+ if (!(*pScreenInfo->SwitchMode)(iScreen, pMode, 0))
+ return FALSE;
+ if (!pDGAMode)
+ pATI->currentMode = NULL;
+ (*pScreenInfo->AdjustFrame)(iScreen, frameX0, frameY0, 0);
+
+ return TRUE;
+}
+
+/*
+ * ATIDGASetViewport --
+ *
+ * This function sets the display start address for a DGA client.
+ */
+static void
+ATIDGASetViewport
+(
+ ScrnInfoPtr pScreenInfo,
+ int x,
+ int y,
+ int flags
+)
+{
+ (*pScreenInfo->AdjustFrame)(pScreenInfo->pScreen->myNum, x, y, flags);
+}
+
+/*
+ * ATIDGAGetViewport --
+ *
+ * This function returns the current status of prior DGA requests to set the
+ * adapter's display start address.
+ */
+static int
+ATIDGAGetViewport
+(
+ ScrnInfoPtr pScreenInfo
+)
+{
+ return 0; /* There are never any pending requests */
+}
+
+/*
+ * ATIDGAFillRect --
+ *
+ * This function calls XAA solid fill primitives to fill a rectangle.
+ */
+static void
+ATIDGAFillRect
+(
+ ScrnInfoPtr pScreenInfo,
+ int x,
+ int y,
+ int w,
+ int h,
+ unsigned long colour
+)
+{
+ ATIPtr pATI = ATIPTR(pScreenInfo);
+ XAAInfoRecPtr pXAAInfo = pATI->pXAAInfo;
+
+ (*pXAAInfo->SetupForSolidFill)(pScreenInfo, (int)colour, GXcopy,
+ (CARD32)(~0));
+ (*pXAAInfo->SubsequentSolidFillRect)(pScreenInfo, x, y, w, h);
+
+ if (pScreenInfo->bitsPerPixel == pATI->bitsPerPixel)
+ SET_SYNC_FLAG(pXAAInfo);
+}
+
+/*
+ * ATIDGABlitRect --
+ *
+ * This function calls XAA screen-to-screen copy primitives to copy a
+ * rectangle.
+ */
+static void
+ATIDGABlitRect
+(
+ ScrnInfoPtr pScreenInfo,
+ int xSrc,
+ int ySrc,
+ int w,
+ int h,
+ int xDst,
+ int yDst
+)
+{
+ ATIPtr pATI = ATIPTR(pScreenInfo);
+ XAAInfoRecPtr pXAAInfo = pATI->pXAAInfo;
+ int xdir = ((xSrc < xDst) && (ySrc == yDst)) ? -1 : 1;
+ int ydir = (ySrc < yDst) ? -1 : 1;
+
+ (*pXAAInfo->SetupForScreenToScreenCopy)(pScreenInfo,
+ xdir, ydir, GXcopy, (CARD32)(~0), -1);
+ (*pXAAInfo->SubsequentScreenToScreenCopy)(pScreenInfo,
+ xSrc, ySrc, xDst, yDst, w, h);
+
+ if (pScreenInfo->bitsPerPixel == pATI->bitsPerPixel)
+ SET_SYNC_FLAG(pXAAInfo);
+}
+
+/*
+ * ATIDGABlitTransRect --
+ *
+ * This function calls XAA screen-to-screen copy primitives to transparently
+ * copy a rectangle.
+ */
+static void
+ATIDGABlitTransRect
+(
+ ScrnInfoPtr pScreenInfo,
+ int xSrc,
+ int ySrc,
+ int w,
+ int h,
+ int xDst,
+ int yDst,
+ unsigned long colour
+)
+{
+ ATIPtr pATI = ATIPTR(pScreenInfo);
+ XAAInfoRecPtr pXAAInfo = pATI->pXAAInfo;
+ int xdir = ((xSrc < xDst) && (ySrc == yDst)) ? -1 : 1;
+ int ydir = (ySrc < yDst) ? -1 : 1;
+
+ pATI->XAAForceTransBlit = TRUE;
+
+ (*pXAAInfo->SetupForScreenToScreenCopy)(pScreenInfo,
+ xdir, ydir, GXcopy, (CARD32)(~0), (int)colour);
+
+ pATI->XAAForceTransBlit = FALSE;
+
+ (*pXAAInfo->SubsequentScreenToScreenCopy)(pScreenInfo,
+ xSrc, ySrc, xDst, yDst, w, h);
+
+ if (pScreenInfo->bitsPerPixel == pATI->bitsPerPixel)
+ SET_SYNC_FLAG(pXAAInfo);
+}
+
+/*
+ * ATIDGAAddModes --
+ *
+ * This function translates DisplayModeRec's into DGAModeRec's.
+ */
+static void
+ATIDGAAddModes
+(
+ ScrnInfoPtr pScreenInfo,
+ ATIPtr pATI,
+ int flags,
+ int depth,
+ int bitsPerPixel,
+ int redMask,
+ int greenMask,
+ int blueMask,
+ int visualClass
+)
+{
+ DisplayModePtr pMode = pScreenInfo->modes;
+ DGAModePtr pDGAMode;
+ int displayWidth = pScreenInfo->displayWidth;
+ int videoBits = pScreenInfo->videoRam * 1024 * 8;
+ int xViewportStep = 64 / UnitOf(bitsPerPixel);
+ int modePitch, bitsPerScanline, maxViewportY;
+
+ if (bitsPerPixel != pScreenInfo->bitsPerPixel)
+ displayWidth = 0;
+
+ while (1)
+ {
+ /* Weed out multiscanned modes */
+ if ((pMode->VScan <= 1) ||
+ ((pMode->VScan == 2) && !(pMode->Flags & V_DBLSCAN)))
+ {
+ /*
+ * For code simplicity, ensure DGA mode pitch is a multiple of 64
+ * bytes.
+ */
+ if (!(modePitch = displayWidth))
+ {
+ modePitch = ((64 * 8) / UnitOf(bitsPerPixel)) - 1;
+ modePitch = (pMode->HDisplay + modePitch) & ~modePitch;
+ }
+
+ /* Ensure the mode fits in video memory */
+ if ((modePitch * bitsPerPixel * pMode->VDisplay) <= videoBits)
+ {
+ /* Stop generating modes on out-of-memory conditions */
+ pDGAMode = xrealloc(pATI->pDGAMode,
+ (pATI->nDGAMode + 1) * SizeOf(DGAModeRec));
+ if (!pDGAMode)
+ break;
+
+ pATI->pDGAMode = pDGAMode;
+ pDGAMode += pATI->nDGAMode;
+ pATI->nDGAMode++;
+ (void)memset(pDGAMode, 0, SizeOf(DGAModeRec));
+
+ /* Fill in the mode structure */
+ pDGAMode->mode = pMode;
+ pDGAMode->flags = flags;
+ if (bitsPerPixel == pScreenInfo->bitsPerPixel)
+ {
+ pDGAMode->flags |= DGA_PIXMAP_AVAILABLE;
+ pDGAMode->address = pATI->pMemory;
+
+ if (pATI->pXAAInfo)
+ pDGAMode->flags &= ~DGA_CONCURRENT_ACCESS;
+ }
+ if ((pMode->Flags & V_DBLSCAN) || (pMode->VScan > 1))
+ pDGAMode->flags |= DGA_DOUBLESCAN;
+ if (pMode->Flags & V_INTERLACE)
+ pDGAMode->flags |= DGA_INTERLACED;
+
+ pDGAMode->byteOrder = pScreenInfo->imageByteOrder;
+ pDGAMode->depth = depth;
+ pDGAMode->bitsPerPixel = bitsPerPixel;
+ pDGAMode->red_mask = redMask;
+ pDGAMode->green_mask = greenMask;
+ pDGAMode->blue_mask = blueMask;
+ pDGAMode->visualClass = visualClass;
+
+ pDGAMode->viewportWidth = pMode->HDisplay;
+ pDGAMode->viewportHeight = pMode->VDisplay;
+ pDGAMode->xViewportStep = xViewportStep;
+ pDGAMode->yViewportStep = 1;
+
+ bitsPerScanline = modePitch * bitsPerPixel;
+ pDGAMode->bytesPerScanline = bitsPerScanline / 8;
+ pDGAMode->imageWidth = pDGAMode->pixmapWidth = modePitch;
+ pDGAMode->imageHeight = pDGAMode->pixmapHeight =
+ videoBits / bitsPerScanline;
+
+ pDGAMode->maxViewportX =
+ pDGAMode->imageWidth - pDGAMode->viewportWidth;
+ pDGAMode->maxViewportY =
+ pDGAMode->imageHeight - pDGAMode->viewportHeight;
+ maxViewportY =
+ ((((pATI->AdjustMaxBase * 8) / bitsPerPixel) +
+ xViewportStep) / modePitch) - 1;
+ if (maxViewportY < pDGAMode->maxViewportY)
+ pDGAMode->maxViewportY = maxViewportY;
+ }
+ }
+
+ if ((pMode = pMode->next) == pScreenInfo->modes)
+ {
+ if (!displayWidth)
+ break;
+
+ displayWidth = 0;
+ }
+ }
+}
+
+/*
+ * ATIDGAInit --
+ *
+ * This function initialises the driver's support for the DGA extension.
+ */
+Bool
+ATIDGAInit
+(
+ ScrnInfoPtr pScreenInfo,
+ ScreenPtr pScreen,
+ ATIPtr pATI
+)
+{
+ XAAInfoRecPtr pXAAInfo;
+ int flags;
+
+ if (!pATI->nDGAMode)
+ {
+
+#ifndef AVOID_CPIO
+
+ /*
+ * Contrary to previous extension versions, DGA 2 does not support
+ * banked framebuffers. Also, disable DGA when non-DGA server modes
+ * are planar.
+ */
+ if (pATI->BankInfo.BankSize || (pScreenInfo->depth <= 4))
+ return FALSE;
+
+#endif /* AVOID_CPIO */
+
+ /* Set up DGA callbacks */
+ pATI->ATIDGAFunctions.OpenFramebuffer = ATIDGAOpenFramebuffer;
+ pATI->ATIDGAFunctions.SetMode = ATIDGASetMode;
+ pATI->ATIDGAFunctions.SetViewport = ATIDGASetViewport;
+ pATI->ATIDGAFunctions.GetViewport = ATIDGAGetViewport;
+
+ flags = 0;
+ if ((pXAAInfo = pATI->pXAAInfo))
+ {
+ pATI->ATIDGAFunctions.Sync = pXAAInfo->Sync;
+ if (pXAAInfo->SetupForSolidFill &&
+ pXAAInfo->SubsequentSolidFillRect)
+ {
+ flags |= DGA_FILL_RECT;
+ pATI->ATIDGAFunctions.FillRect = ATIDGAFillRect;
+ }
+ if (pXAAInfo->SetupForScreenToScreenCopy &&
+ pXAAInfo->SubsequentScreenToScreenCopy)
+ {
+ flags |= DGA_BLIT_RECT | DGA_BLIT_RECT_TRANS;
+ pATI->ATIDGAFunctions.BlitRect = ATIDGABlitRect;
+ pATI->ATIDGAFunctions.BlitTransRect = ATIDGABlitTransRect;
+ }
+ }
+ if (!flags)
+ flags = DGA_CONCURRENT_ACCESS;
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 8, 8, 0, 0, 0, PseudoColor);
+
+ if ((pATI->Chip >= ATI_CHIP_264CT) &&
+ (pATI->Chipset == ATI_CHIPSET_ATI))
+ {
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 15, 16, 0x7C00U, 0x03E0U, 0x001FU, TrueColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 16, 16, 0xF800U, 0x07E0U, 0x001FU, TrueColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 24, 24, 0x00FF0000U, 0x0000FF00U, 0x000000FFU, TrueColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 24, 32, 0x00FF0000U, 0x0000FF00U, 0x000000FFU, TrueColor);
+
+ if (pATI->DAC != ATI_DAC_INTERNAL) /* Not first revision */
+ {
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 15, 16, 0x7C00U, 0x03E0U, 0x001FU, DirectColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 16, 16, 0xF800U, 0x07E0U, 0x001FU, DirectColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 24, 24, 0x00FF0000U, 0x0000FF00U, 0x000000FFU, DirectColor);
+
+ ATIDGAAddModes(pScreenInfo, pATI, flags,
+ 24, 32, 0x00FF0000U, 0x0000FF00U, 0x000000FFU, DirectColor);
+ }
+ }
+ }
+
+ return DGAInit(pScreen, &pATI->ATIDGAFunctions, pATI->pDGAMode,
+ pATI->nDGAMode);
+}
+
+#endif /* AVOID_DGA */
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