atiscreen.c

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/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiscreen.c,v 1.30 2003/04/23 21:51:30 tsi Exp $ */
/*
 * Copyright 1999 through 2004 by Marc Aurele La France (TSI @ UQV), [e-mail]
 *
 * 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.
 *
 * DRI support by:
 *    Gareth Hughes <[e-mail]>
 *    José Fonseca <[e-mail]>
 *    Leif Delgass <[e-mail]>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>

#include "ati.h"
#include "atibus.h"
#include "atichip.h"
#include "atiaccel.h"
#include "aticonsole.h"
#include "aticursor.h"
#include "atidac.h"
#include "atidga.h"
#include "atidri.h"
#include "atimach64.h"
#include "atimode.h"
#include "atiscreen.h"
#include "atistruct.h"
#include "atixv.h"
#include "atimach64accel.h"

#ifdef XF86DRI_DEVEL
#include "mach64_dri.h"
#include "mach64_sarea.h"
#endif

#ifdef TV_OUT

#include "atichip.h"

#endif /* TV_OUT */

#include "shadowfb.h"
#include "xf86cmap.h"

#include "xf1bpp.h"
#include "xf4bpp.h"

#include "fb.h"

#include "mibank.h"
#include "micmap.h"
#include "mipointer.h"

/*
 * ATIRefreshArea --
 *
 * This function is called by the shadow frame buffer code to refresh the
 * hardware frame buffer.
 */
static void
ATIRefreshArea
(
    ScrnInfoPtr pScreenInfo,
    int         nBox,
    BoxPtr      pBox
)
{
    ATIPtr  pATI = ATIPTR(pScreenInfo);
    pointer pSrc, pDst;
    int     offset, w, h;

    while (nBox-- > 0)
    {
        w = (pBox->x2 - pBox->x1) * pATI->AdjustDepth;
        h = pBox->y2 - pBox->y1;
        offset = (pBox->y1 * pATI->FBPitch) + (pBox->x1 * pATI->AdjustDepth);
        pSrc = (char *)pATI->pShadow + offset;
        pDst = (char *)pATI->pMemory + offset;

        while (h-- > 0)
        {
            (void)memcpy(pDst, pSrc, w);
            pSrc = (char *)pSrc + pATI->FBPitch;
            pDst = (char *)pDst + pATI->FBPitch;
        }

        pBox++;
    }
}

/*
 * ATIMinBits --
 *
 * Compute log base 2 of val.
 */
static int
ATIMinBits
(
    int val
)
{
    int bits;

    if (!val) return 1;
    for (bits = 0; val; val >>= 1, ++bits);
    return bits;
}

#ifdef USE_XAA
static Bool
ATIMach64SetupMemXAA_NoDRI
(
    int       iScreen,
    ScreenPtr pScreen
)
{
    ScrnInfoPtr  pScreenInfo = xf86Screens[iScreen];
    ATIPtr       pATI        = ATIPTR(pScreenInfo);

    int maxScanlines = ATIMach64MaxY;
    int maxPixelArea, PixelArea;

#ifndef AVOID_CPIO

    if (!pATI->BankInfo.BankSize)

#endif /* AVOID_CPIO */
    {
        /*
         * Note:  If PixelArea exceeds the engine's maximum, the excess is
         *        never used, even though it would be useful for such things
         *        as XVideo buffers.
         */
        maxPixelArea = maxScanlines * pScreenInfo->displayWidth;
        PixelArea = pScreenInfo->videoRam * 1024 * 8 / pATI->bitsPerPixel;
        if (PixelArea > maxPixelArea)
            PixelArea = maxPixelArea;
        xf86InitFBManagerArea(pScreen, PixelArea, 2);
    }

    return TRUE;
}

#ifdef XF86DRI_DEVEL
/*
 * Memory layour for XAA with DRI (no local_textures):
 * | front  | pixmaps, xv | back   | depth  | textures | c |
 *
 * 1024x768@16bpp with 8 MB:
 * | 1.5 MB | ~3.5 MB     | 1.5 MB | 1.5 MB | 0        | c |
 *
 * 1024x768@32bpp with 8 MB:
 * | 3.0 MB | ~0.5 MB     | 3.0 MB | 1.5 MB | 0        | c |
 *
 * "c" is the hw cursor which occupies 1KB
 */
static Bool
ATIMach64SetupMemXAA
(
    int       iScreen,
    ScreenPtr pScreen
)
{
	ScrnInfoPtr  pScreenInfo = xf86Screens[iScreen];
	ATIPtr       pATI        = ATIPTR(pScreenInfo);

	ATIDRIServerInfoPtr pATIDRIServer = pATI->pDRIServerInfo;
	int cpp = pATI->bitsPerPixel >> 3;
	int widthBytes = pScreenInfo->displayWidth * cpp;
	int zWidthBytes = pScreenInfo->displayWidth * 2; /* always 16-bit z-buffer */
	int fbSize = pScreenInfo->videoRam * 1024;
	int bufferSize = pScreenInfo->virtualY * widthBytes;
	int zBufferSize = pScreenInfo->virtualY * zWidthBytes;
	int offscreenBytes, total, scanlines;

	pATIDRIServer->fbX = 0;
	pATIDRIServer->fbY = 0;
	pATIDRIServer->frontOffset = 0;
	pATIDRIServer->frontPitch = pScreenInfo->displayWidth;

	/* Calculate memory remaining for pixcache and textures after 
	 * front, back, and depth buffers
	 */
	offscreenBytes = fbSize - ( 2 * bufferSize + zBufferSize );

	if ( !pATIDRIServer->IsPCI && !pATI->OptionLocalTextures ) {
	    /* Don't allocate a local texture heap for AGP unless requested */
	    pATIDRIServer->textureSize = 0;
	} else {
	    int l, maxPixcache;

#ifdef XvExtension

	    int xvBytes;

	    /* Try for enough pixmap cache for DVD and a full viewport
	     */
	    xvBytes = 720*480*cpp; /* enough for single-buffered DVD */
	    maxPixcache = xvBytes > bufferSize ? xvBytes : bufferSize;

#else /* XvExtension */

	    /* Try for one viewport */
	    maxPixcache = bufferSize;

#endif /* XvExtension */

	    pATIDRIServer->textureSize = offscreenBytes - maxPixcache;

	    /* If that gives us less than half the offscreen mem available for textures, split 
	     * the available mem between textures and pixmap cache
	     */
	    if (pATIDRIServer->textureSize < (offscreenBytes/2)) {
		pATIDRIServer->textureSize = offscreenBytes/2;
	    }

	    if (pATIDRIServer->textureSize <= 0)
		pATIDRIServer->textureSize = 0;

	    l = ATIMinBits((pATIDRIServer->textureSize-1) / MACH64_NR_TEX_REGIONS);
	    if (l < MACH64_LOG_TEX_GRANULARITY) l = MACH64_LOG_TEX_GRANULARITY;

	    /* Round the texture size up to the nearest whole number of
	     * texture regions.  Again, be greedy about this, don't round
	     * down.
	     */
	    pATIDRIServer->logTextureGranularity = l;
	    pATIDRIServer->textureSize =
		(pATIDRIServer->textureSize >> l) << l;
	}

	total = fbSize - pATIDRIServer->textureSize;
	scanlines = total / widthBytes;
	if (scanlines > ATIMach64MaxY) scanlines = ATIMach64MaxY;

	/* Recalculate the texture offset and size to accomodate any
	 * rounding to a whole number of scanlines.
	 * FIXME: Is this actually needed?
	 */
	pATIDRIServer->textureOffset = scanlines * widthBytes;
	pATIDRIServer->textureSize = fbSize - pATIDRIServer->textureOffset;

	/* Set a minimum usable local texture heap size.  This will fit
	 * two 256x256 textures.  We check this after any rounding of
	 * the texture area.
	 */
	if (pATIDRIServer->textureSize < 256*256 * cpp * 2) {
	    pATIDRIServer->textureOffset = 0;
	    pATIDRIServer->textureSize = 0;
	    scanlines = fbSize / widthBytes;
	    if (scanlines > ATIMach64MaxY) scanlines = ATIMach64MaxY;
	}

	pATIDRIServer->depthOffset = scanlines * widthBytes - zBufferSize;
	pATIDRIServer->depthPitch = pScreenInfo->displayWidth;
	pATIDRIServer->depthY = pATIDRIServer->depthOffset/widthBytes;
	pATIDRIServer->depthX =  (pATIDRIServer->depthOffset - 
				  (pATIDRIServer->depthY * widthBytes)) / cpp;

	pATIDRIServer->backOffset = pATIDRIServer->depthOffset - bufferSize;
	pATIDRIServer->backPitch = pScreenInfo->displayWidth;
	pATIDRIServer->backY = pATIDRIServer->backOffset/widthBytes;
	pATIDRIServer->backX =  (pATIDRIServer->backOffset - 
				  (pATIDRIServer->backY * widthBytes)) / cpp;

	scanlines = fbSize / widthBytes;
	if (scanlines > ATIMach64MaxY) scanlines = ATIMach64MaxY;

	if ( pATIDRIServer->IsPCI && pATIDRIServer->textureSize == 0 ) {
	    xf86DrvMsg(iScreen, X_WARNING,
		       "Not enough memory for local textures, disabling DRI\n");
	    ATIDRICloseScreen(pScreen);
	    pATI->directRenderingEnabled = FALSE;
	} else {
	    BoxRec ScreenArea;

	    ScreenArea.x1 = 0;
	    ScreenArea.y1 = 0;
	    ScreenArea.x2 = pATI->displayWidth;
	    ScreenArea.y2 = scanlines;

	    if (!xf86InitFBManager(pScreen, &ScreenArea)) {
		xf86DrvMsg(pScreenInfo->scrnIndex, X_ERROR,
			   "Memory manager initialization to (%d,%d) (%d,%d) failed\n",
			   ScreenArea.x1, ScreenArea.y1,
			   ScreenArea.x2, ScreenArea.y2);
		return FALSE;
	    } else {
		int width, height;

		xf86DrvMsg(pScreenInfo->scrnIndex, X_INFO,
			   "Memory manager initialized to (%d,%d) (%d,%d)\n",
			   ScreenArea.x1, ScreenArea.y1, ScreenArea.x2, ScreenArea.y2);

		if (xf86QueryLargestOffscreenArea(pScreen, &width, &height, 0, 0, 0)) {
		    xf86DrvMsg(pScreenInfo->scrnIndex, X_INFO,
			       "Largest offscreen area available: %d x %d\n",
			       width, height);

		    /* lines in offscreen area needed for depth buffer and textures */
		    pATI->depthTexLines = scanlines
			- pATIDRIServer->depthOffset / widthBytes;
		    pATI->backLines     = scanlines
			- pATIDRIServer->backOffset / widthBytes
			- pATI->depthTexLines;
		    pATI->depthTexArea  = NULL;
		    pATI->backArea      = NULL;
		} else {
		    xf86DrvMsg(pScreenInfo->scrnIndex, X_ERROR, 
			       "Unable to determine largest offscreen area available\n");
		    return FALSE;
		}

	    }

	    xf86DrvMsg(iScreen, X_INFO, "Will use %d kB of offscreen memory for XAA\n", 
		       (offscreenBytes - pATIDRIServer->textureSize)/1024);

	    xf86DrvMsg(iScreen, X_INFO, "Will use back buffer at offset 0x%x\n",
		       pATIDRIServer->backOffset);

	    xf86DrvMsg(iScreen, X_INFO, "Will use depth buffer at offset 0x%x\n",
		       pATIDRIServer->depthOffset);

	    if (pATIDRIServer->textureSize > 0) {
		xf86DrvMsg(pScreenInfo->scrnIndex, X_INFO,
			   "Will use %d kB for local textures at offset 0x%x\n",
			   pATIDRIServer->textureSize/1024,
			   pATIDRIServer->textureOffset);
	    }
	}

	return TRUE;
}
#endif /* XF86DRI_DEVEL */
#endif /* USE_XAA */
  	 
/*
 * ATIScreenInit --
 *
 * This function is called by DIX to initialise the screen.
 */
_X_EXPORT Bool
ATIScreenInit
(
    int       iScreen,
    ScreenPtr pScreen,
    int       argc,
    char      **argv
)
{
    ScrnInfoPtr  pScreenInfo = xf86Screens[iScreen];
    ATIPtr       pATI        = ATIPTR(pScreenInfo);
    pointer      pFB;
    int          VisualMask;

    /* Set video hardware state */
    if (!ATIEnterGraphics(pScreen, pScreenInfo, pATI))
        return FALSE;