r128_accel.c

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    BEGIN_RING( 12 );

    OUT_RING_REG(R128_DP_GUI_MASTER_CNTL, (info->dp_gui_master_cntl
				     | (bg == -1
					? R128_GMC_BRUSH_8X8_MONO_FG_LA
					: R128_GMC_BRUSH_8X8_MONO_FG_BG)
				     | R128_ROP[rop].pattern
				     | R128_GMC_BYTE_LSB_TO_MSB));
    OUT_RING_REG(R128_DP_WRITE_MASK,      planemask);
    OUT_RING_REG(R128_DP_BRUSH_FRGD_CLR,  fg);
    OUT_RING_REG(R128_DP_BRUSH_BKGD_CLR,  bg);
    OUT_RING_REG(R128_BRUSH_DATA0,        patternx);
    OUT_RING_REG(R128_BRUSH_DATA1,        patterny);

    ADVANCE_RING();
}

static void R128CCESubsequentMono8x8PatternFillRect(ScrnInfoPtr pScrn,
						 int patternx, int patterny,
						 int x, int y, int w, int h)
{
    R128InfoPtr   info      = R128PTR(pScrn);
    RING_LOCALS;

    R128CCE_REFRESH( pScrn, info );

    BEGIN_RING( 6 );

    OUT_RING_REG(R128_BRUSH_Y_X,        (patterny << 8) | patternx);
    OUT_RING_REG(R128_DST_Y_X,          (y << 16) | x);
    OUT_RING_REG(R128_DST_HEIGHT_WIDTH, (h << 16) | w);

    ADVANCE_RING();
}

/* Get an indirect buffer for the CCE 2D acceleration commands.
 */
drmBufPtr R128CCEGetBuffer( ScrnInfoPtr pScrn )
{
    R128InfoPtr   info = R128PTR(pScrn);
    drmDMAReq dma;
    drmBufPtr buf = NULL;
    int indx = 0;
    int size = 0;
    int ret, i = 0;

#if 0
    /* FIXME: pScrn->pScreen has not been initialized when this is first
       called from RADEONSelectBuffer via RADEONDRICPInit.  We could use
       the screen index from pScrn, which is initialized, and then get
       the screen from screenInfo.screens[index], but that is a hack. */
    dma.context = DRIGetContext(pScrn->pScreen);
#else
    dma.context = 0x00000001; /* This is the X server's context */
#endif
    dma.send_count = 0;
    dma.send_list = NULL;
    dma.send_sizes = NULL;
    dma.flags = 0;
    dma.request_count = 1;
    dma.request_size = R128_BUFFER_SIZE;
    dma.request_list = &indx;
    dma.request_sizes = &size;
    dma.granted_count = 0;

    while ( 1 ) {
	do {
	    ret = drmDMA( info->drmFD, &dma );
	    if ( ret && ret != -EAGAIN ) {
		xf86DrvMsg( pScrn->scrnIndex, X_ERROR,
			    "%s: CCE GetBuffer %d\n", __FUNCTION__, ret );
	    }
	} while ( ( ret == -EAGAIN ) && ( i++ < R128_TIMEOUT ) );

	if ( ret == 0 ) {
	    buf = &info->buffers->list[indx];
	    buf->used = 0;
	    if ( R128_VERBOSE ) {
		xf86DrvMsg( pScrn->scrnIndex, X_INFO,
			    "   GetBuffer returning %d\n", buf->idx );
	    }
	    return buf;
	}

	xf86DrvMsg( pScrn->scrnIndex, X_ERROR,
		    "GetBuffer timed out, resetting engine...\n");
	R128EngineReset( pScrn );
	/* R128EngineRestore( pScrn ); FIXME ??? */

	/* Always restart the engine when doing CCE 2D acceleration */
	R128CCE_RESET( pScrn, info );
	R128CCE_START( pScrn, info );
    }
}

/* Flush the indirect buffer to the kernel for submission to the card.
 */
void R128CCEFlushIndirect( ScrnInfoPtr pScrn, int discard )
{
    R128InfoPtr   info = R128PTR(pScrn);
    drmBufPtr buffer = info->indirectBuffer;
    int start = info->indirectStart;
    drmR128Indirect indirect;

    if ( !buffer )
	return;

    if ( (start == buffer->used) && !discard )
        return;

    indirect.idx = buffer->idx;
    indirect.start = start;
    indirect.end = buffer->used;
    indirect.discard = discard;

    drmCommandWriteRead( info->drmFD, DRM_R128_INDIRECT,
                         &indirect, sizeof(drmR128Indirect));

    if ( discard )
        buffer = info->indirectBuffer = R128CCEGetBuffer( pScrn );

    /* pad to an even number of dwords */
    if (buffer->used & 7)
        buffer->used = ( buffer->used+7 ) & ~7;

    info->indirectStart = buffer->used;
}

/* Flush and release the indirect buffer.
 */
void R128CCEReleaseIndirect( ScrnInfoPtr pScrn )
{
    R128InfoPtr   info = R128PTR(pScrn);
    drmBufPtr buffer = info->indirectBuffer;
    int start = info->indirectStart;
    drmR128Indirect indirect;

    info->indirectBuffer = NULL;
    info->indirectStart = 0;

    if ( !buffer )
	return;

    indirect.idx = buffer->idx;
    indirect.start = start;
    indirect.end = buffer->used;
    indirect.discard = 1;

    drmCommandWriteRead( info->drmFD, DRM_R128_INDIRECT,
                         &indirect, sizeof(drmR128Indirect));
}

/* This callback is required for multihead cards using XAA */
static
void R128RestoreCCEAccelState(ScrnInfoPtr pScrn)
{
    R128InfoPtr info        = R128PTR(pScrn);
/*    unsigned char *R128MMIO = info->MMIO;  needed for OUTREG below */
    /*xf86DrvMsg(pScrn->scrnIndex, X_INFO, "===>RestoreCP\n");*/

    R128WaitForFifo(pScrn, 1);
/* is this needed on r128
    OUTREG( R128_DEFAULT_OFFSET, info->frontPitchOffset);
*/
    R128WaitForIdle(pScrn);

    /* FIXME: May need to restore other things, 
       like BKGD_CLK FG_CLK...*/

}

static void R128CCEAccelInit(ScrnInfoPtr pScrn, XAAInfoRecPtr a)
{
    R128InfoPtr info = R128PTR(pScrn);

    a->Flags                            = (PIXMAP_CACHE
					   | OFFSCREEN_PIXMAPS
					   | LINEAR_FRAMEBUFFER);

				/* Sync */
    a->Sync                             = R128CCEWaitForIdle;

    /* Solid Filled Rectangle */
    a->PolyFillRectSolidFlags           = 0;
    a->SetupForSolidFill                = R128CCESetupForSolidFill;
    a->SubsequentSolidFillRect          = R128CCESubsequentSolidFillRect;

				/* Screen-to-screen Copy */
				/* Transparency uses the wrong colors for
				   24 bpp mode -- the transparent part is
				   correct, but the opaque color is wrong.
				   This can be seen with netscape's I-bar
				   cursor when editing in the URL location
				   box. */
    a->ScreenToScreenCopyFlags          = ((pScrn->bitsPerPixel == 24)
					   ? NO_TRANSPARENCY
					   : 0);
    a->SetupForScreenToScreenCopy       = R128CCESetupForScreenToScreenCopy;
    a->SubsequentScreenToScreenCopy     = R128CCESubsequentScreenToScreenCopy;

				/* Indirect CPU-To-Screen Color Expand */
    a->ScanlineCPUToScreenColorExpandFillFlags = LEFT_EDGE_CLIPPING
					       | LEFT_EDGE_CLIPPING_NEGATIVE_X;
    a->NumScanlineColorExpandBuffers   = 1;
    a->ScanlineColorExpandBuffers      = info->scratch_buffer;
    info->scratch_buffer[0]            = NULL;
    a->SetupForScanlineCPUToScreenColorExpandFill
	= R128CCESetupForScanlineCPUToScreenColorExpandFill;
    a->SubsequentScanlineCPUToScreenColorExpandFill
	= R128CCESubsequentScanlineCPUToScreenColorExpandFill;
    a->SubsequentColorExpandScanline   = R128CCESubsequentColorExpandScanline;

				/* Bresenham Solid Lines */
    a->SetupForSolidLine               = R128CCESetupForSolidLine;
    a->SubsequentSolidBresenhamLine    = R128CCESubsequentSolidBresenhamLine;
    a->SubsequentSolidHorVertLine      = R128CCESubsequentSolidHorVertLine;

				/* Bresenham Dashed Lines*/
    a->SetupForDashedLine              = R128CCESetupForDashedLine;
    a->SubsequentDashedBresenhamLine   = R128CCESubsequentDashedBresenhamLine;
    a->DashPatternMaxLength            = 32;
    a->DashedLineFlags                 = (LINE_PATTERN_LSBFIRST_LSBJUSTIFIED
					  | LINE_PATTERN_POWER_OF_2_ONLY);

				/* Mono 8x8 Pattern Fill (Color Expand) */
    a->SetupForMono8x8PatternFill       = R128CCESetupForMono8x8PatternFill;
    a->SubsequentMono8x8PatternFillRect = R128CCESubsequentMono8x8PatternFillRect;
    a->Mono8x8PatternFillFlags          = (HARDWARE_PATTERN_PROGRAMMED_BITS
					   | HARDWARE_PATTERN_PROGRAMMED_ORIGIN
					   | HARDWARE_PATTERN_SCREEN_ORIGIN
					   | BIT_ORDER_IN_BYTE_LSBFIRST);

    if(!info->IsSecondary && xf86IsEntityShared(pScrn->entityList[0]))
        a->RestoreAccelState           = R128RestoreCCEAccelState;

}
#endif

/* This callback is required for multihead cards using XAA */
static
void R128RestoreAccelState(ScrnInfoPtr pScrn)
{
    R128InfoPtr info        = R128PTR(pScrn);
    unsigned char *R128MMIO = info->MMIO;

    R128WaitForFifo(pScrn, 2);
    OUTREG(R128_DEFAULT_OFFSET, pScrn->fbOffset);
    OUTREG(R128_DEFAULT_PITCH,  info->pitch);

    /* FIXME: May need to restore other things, 
       like BKGD_CLK FG_CLK...*/

    R128WaitForIdle(pScrn);

}

static void R128MMIOAccelInit(ScrnInfoPtr pScrn, XAAInfoRecPtr a)
{
    R128InfoPtr info = R128PTR(pScrn);

    a->Flags                            = (PIXMAP_CACHE
					   | OFFSCREEN_PIXMAPS
					   | LINEAR_FRAMEBUFFER);

				/* Sync */
    a->Sync                             = R128WaitForIdle;

				/* Solid Filled Rectangle */
    a->PolyFillRectSolidFlags           = 0;
    a->SetupForSolidFill                = R128SetupForSolidFill;
    a->SubsequentSolidFillRect          = R128SubsequentSolidFillRect;

				/* Screen-to-screen Copy */
				/* Transparency uses the wrong colors for
				   24 bpp mode -- the transparent part is
				   correct, but the opaque color is wrong.
				   This can be seen with netscape's I-bar
				   cursor when editing in the URL location
				   box. */
    a->ScreenToScreenCopyFlags          = ((pScrn->bitsPerPixel == 24)
					   ? NO_TRANSPARENCY
					   : 0);
    a->SetupForScreenToScreenCopy       = R128SetupForScreenToScreenCopy;
    a->SubsequentScreenToScreenCopy     = R128SubsequentScreenToScreenCopy;

				/* Mono 8x8 Pattern Fill (Color Expand) */
    a->SetupForMono8x8PatternFill       = R128SetupForMono8x8PatternFill;
    a->SubsequentMono8x8PatternFillRect = R128SubsequentMono8x8PatternFillRect;
    a->Mono8x8PatternFillFlags          = (HARDWARE_PATTERN_PROGRAMMED_BITS
					   | HARDWARE_PATTERN_PROGRAMMED_ORIGIN
					   | HARDWARE_PATTERN_SCREEN_ORIGIN
					   | BIT_ORDER_IN_BYTE_LSBFIRST);

				/* Indirect CPU-To-Screen Color Expand */
    a->ScanlineCPUToScreenColorExpandFillFlags = LEFT_EDGE_CLIPPING
					       | LEFT_EDGE_CLIPPING_NEGATIVE_X;
    a->NumScanlineColorExpandBuffers   = 1;
    a->ScanlineColorExpandBuffers      = info->scratch_buffer;
    info->scratch_save                 = xalloc(((pScrn->virtualX+31)/32*4)
					    + (pScrn->virtualX
					    * info->CurrentLayout.pixel_bytes));
    info->scratch_buffer[0]            = info->scratch_save;
    a->SetupForScanlineCPUToScreenColorExpandFill
	= R128SetupForScanlineCPUToScreenColorExpandFill;
    a->SubsequentScanlineCPUToScreenColorExpandFill
	= R128SubsequentScanlineCPUToScreenColorExpandFill;
    a->SubsequentColorExpandScanline   = R128SubsequentColorExpandScanline;

				/* Bresenham Solid Lines */
    a->SetupForSolidLine               = R128SetupForSolidLine;
    a->SubsequentSolidBresenhamLine    = R128SubsequentSolidBresenhamLine;
    a->SubsequentSolidHorVertLine      = R128SubsequentSolidHorVertLine;

				/* Bresenham Dashed Lines*/
    a->SetupForDashedLine              = R128SetupForDashedLine;
    a->SubsequentDashedBresenhamLine   = R128SubsequentDashedBresenhamLine;
    a->DashPatternMaxLength            = 32;
    a->DashedLineFlags                 = (LINE_PATTERN_LSBFIRST_LSBJUSTIFIED
					  | LINE_PATTERN_POWER_OF_2_ONLY);

				/* ImageWrite */
    a->NumScanlineImageWriteBuffers    = 1;
    a->ScanlineImageWriteBuffers       = info->scratch_buffer;
    info->scratch_buffer[0]            = info->scratch_save;
    a->SetupForScanlineImageWrite      = R128SetupForScanlineImageWrite;
    a->SubsequentScanlineImageWriteRect= R128SubsequentScanlineImageWriteRect;
    a->SubsequentImageWriteScanline    = R128SubsequentImageWriteScanline;
    a->ScanlineImageWriteFlags         = CPU_TRANSFER_PAD_DWORD
		/* Performance tests show that we shouldn't use GXcopy for
		 * uploads as a memcpy is faster */
					  | NO_GXCOPY
					  | LEFT_EDGE_CLIPPING
					  | LEFT_EDGE_CLIPPING_NEGATIVE_X
					  | SCANLINE_PAD_DWORD;

    if(xf86IsEntityShared(pScrn->entityList[0]))
    {
        DevUnion* pPriv;
        R128EntPtr pR128Ent;
        pPriv = xf86GetEntityPrivate(pScrn->entityList[0],
                getR128EntityIndex());
        pR128Ent = pPriv->ptr;
        
        /*if there are more than one devices sharing this entity, we
          have to assign this call back, otherwise the XAA will be
          disabled */
        if(pR128Ent->HasSecondary || pR128Ent->BypassSecondary)
           a->RestoreAccelState           = R128RestoreAccelState;
    }

}

/* Initialize XAA for supported acceleration and also initialize the
   graphics hardware for acceleration. */
Bool R128AccelInit(ScreenPtr pScreen)
{
    ScrnInfoPtr   pScrn = xf86Screens[pScreen->myNum];
    R128InfoPtr   info  = R128PTR(pScrn);
    XAAInfoRecPtr a;

    if (!(a = info->accel = XAACreateInfoRec())) return FALSE;

#ifdef XF86DRI
    if (info->directRenderingEnabled)
	R128CCEAccelInit(pScrn, a);
    else
#endif
	R128MMIOAccelInit(pScrn, a);

    R128EngineInit(pScrn);
    return XAAInit(pScreen, a);
}