/*
 * Copyright 2005 Eric Anholt
 * Copyright 2005 Benjamin Herrenschmidt
 * Copyright 2006 Tungsten Graphics, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <anholt@FreeBSD.org>
 *    Zack Rusin <zrusin@trolltech.com>
 *    Benjamin Herrenschmidt <benh@kernel.crashing.org>
 *    Michel Dänzer <michel@daenzer.net>
 *
 */

#if defined(ACCEL_MMIO) && defined(ACCEL_CP)
#error Cannot define both MMIO and CP acceleration!
#endif

#if !defined(UNIXCPP) || defined(ANSICPP)
#define FUNC_NAME_CAT(prefix,suffix) prefix##suffix
#else
#define FUNC_NAME_CAT(prefix,suffix) prefix/**/suffix
#endif

#ifdef ACCEL_MMIO
#define FUNC_NAME(prefix) FUNC_NAME_CAT(prefix,MMIO)
#else
#ifdef ACCEL_CP
#define FUNC_NAME(prefix) FUNC_NAME_CAT(prefix,CP)
#else
#error No accel type defined!
#endif
#endif

#include <errno.h>
#include <string.h>

#include "radeon.h"

#include "exa.h"

static int
FUNC_NAME(RADEONMarkSync)(ScreenPtr pScreen)
{
    RINFO_FROM_SCREEN(pScreen);

    TRACE;

    return ++info->accel_state->exaSyncMarker;
}

static void
FUNC_NAME(RADEONSync)(ScreenPtr pScreen, int marker)
{
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    RADEONInfoPtr info = RADEONPTR(pScrn);

    if (info->cs)
	    return;

    TRACE;

    if (info->accel_state->exaMarkerSynced != marker) {
	FUNC_NAME(RADEONWaitForIdle)(pScrn);
	info->accel_state->exaMarkerSynced = marker;
    }

    RADEONPTR(pScrn)->accel_state->engineMode = EXA_ENGINEMODE_UNKNOWN;
}

static void FUNC_NAME(Emit2DState)(ScrnInfoPtr pScrn, int op)
{
    RADEONInfoPtr info = RADEONPTR(pScrn);
    int has_src;
    ACCEL_PREAMBLE();

    /* don't emit if no operation in progress */
    if (info->state_2d.op == 0 && op == 0)
	return;

    has_src = info->state_2d.src_pitch_offset || (info->cs && info->state_2d.src_bo);

    if (has_src) {
      BEGIN_ACCEL_RELOC(10, 2);
    } else {
      BEGIN_ACCEL_RELOC(9, 1);
    }
    OUT_ACCEL_REG(RADEON_DEFAULT_SC_BOTTOM_RIGHT, info->state_2d.default_sc_bottom_right);
    OUT_ACCEL_REG(RADEON_DP_GUI_MASTER_CNTL, info->state_2d.dp_gui_master_cntl);
    OUT_ACCEL_REG(RADEON_DP_BRUSH_FRGD_CLR, info->state_2d.dp_brush_frgd_clr);
    OUT_ACCEL_REG(RADEON_DP_BRUSH_BKGD_CLR, info->state_2d.dp_brush_bkgd_clr);
    OUT_ACCEL_REG(RADEON_DP_SRC_FRGD_CLR,   info->state_2d.dp_src_frgd_clr);
    OUT_ACCEL_REG(RADEON_DP_SRC_BKGD_CLR,   info->state_2d.dp_src_bkgd_clr);
    OUT_ACCEL_REG(RADEON_DP_WRITE_MASK, info->state_2d.dp_write_mask);
    OUT_ACCEL_REG(RADEON_DP_CNTL, info->state_2d.dp_cntl);

    OUT_ACCEL_REG(RADEON_DST_PITCH_OFFSET, info->state_2d.dst_pitch_offset);
    if (info->cs)
	OUT_RELOC(info->state_2d.dst_bo, 0, RADEON_GEM_DOMAIN_VRAM);

    if (has_src) {
	    OUT_ACCEL_REG(RADEON_SRC_PITCH_OFFSET, info->state_2d.src_pitch_offset);
	    if (info->cs)
		OUT_RELOC(info->state_2d.src_bo, RADEON_GEM_DOMAIN_GTT|RADEON_GEM_DOMAIN_VRAM, 0);
	    
    }
    FINISH_ACCEL();

    if (op)
	info->state_2d.op = op;
    if (info->cs)
	info->reemit_current2d = FUNC_NAME(Emit2DState);
}

static void
FUNC_NAME(RADEONFlush2D)(PixmapPtr pPix)
{
    RINFO_FROM_SCREEN(pPix->drawable.pScreen);
    ACCEL_PREAMBLE();

    TRACE;

    BEGIN_ACCEL(2);
    OUT_ACCEL_REG(RADEON_DSTCACHE_CTLSTAT, RADEON_RB2D_DC_FLUSH_ALL);
    OUT_ACCEL_REG(RADEON_WAIT_UNTIL,
                  RADEON_WAIT_2D_IDLECLEAN | RADEON_WAIT_DMA_GUI_IDLE);
    FINISH_ACCEL();
}

static void
FUNC_NAME(RADEONDone2D)(PixmapPtr pPix)
{
    RINFO_FROM_SCREEN(pPix->drawable.pScreen);
    info->state_2d.op = 0;

    FUNC_NAME(RADEONFlush2D)(pPix);
}

static Bool
FUNC_NAME(RADEONPrepareSolid)(PixmapPtr pPix, int alu, Pixel pm, Pixel fg)
{
    RINFO_FROM_SCREEN(pPix->drawable.pScreen);
    uint32_t datatype, dst_pitch_offset;

    TRACE;

    if (pPix->drawable.bitsPerPixel == 24)
	RADEON_FALLBACK(("24bpp unsupported\n"));
    if (!RADEONGetDatatypeBpp(pPix->drawable.bitsPerPixel, &datatype))
	RADEON_FALLBACK(("RADEONGetDatatypeBpp failed\n"));
    if (!RADEONGetPixmapOffsetPitch(pPix, &dst_pitch_offset))
	RADEON_FALLBACK(("RADEONGetPixmapOffsetPitch failed\n"));

    RADEON_SWITCH_TO_2D();

#ifdef XF86DRM_MODE
    if (info->cs) {
	struct radeon_exa_pixmap_priv *driver_priv;
	int ret;
      
	radeon_cs_space_reset_bos(info->cs);

	driver_priv = exaGetPixmapDriverPrivate(pPix);
	radeon_cs_space_add_persistent_bo(info->cs, driver_priv->bo, 0, RADEON_GEM_DOMAIN_VRAM);

	ret = radeon_cs_space_check(info->cs);
	if (ret)
	    RADEON_FALLBACK(("Not enough RAM to hw accel solid operation\n"));

	driver_priv = exaGetPixmapDriverPrivate(pPix);
	if (driver_priv)
	    info->state_2d.dst_bo = driver_priv->bo;
    }
#endif

    info->state_2d.default_sc_bottom_right = (RADEON_DEFAULT_SC_RIGHT_MAX |
					       RADEON_DEFAULT_SC_BOTTOM_MAX);
    info->state_2d.dp_brush_bkgd_clr = 0x00000000;
    info->state_2d.dp_src_frgd_clr = 0xffffffff;
    info->state_2d.dp_src_bkgd_clr = 0x00000000;
    info->state_2d.dp_gui_master_cntl = (RADEON_GMC_DST_PITCH_OFFSET_CNTL |
					  RADEON_GMC_BRUSH_SOLID_COLOR |
					  (datatype << 8) |
					  RADEON_GMC_SRC_DATATYPE_COLOR |
					  RADEON_ROP[alu].pattern |
					  RADEON_GMC_CLR_CMP_CNTL_DIS);
    info->state_2d.dp_brush_frgd_clr = fg;
    info->state_2d.dp_cntl = (RADEON_DST_X_LEFT_TO_RIGHT | RADEON_DST_Y_TOP_TO_BOTTOM);
    info->state_2d.dp_write_mask = pm;
    info->state_2d.dst_pitch_offset = dst_pitch_offset;
    info->state_2d.src_pitch_offset = 0;
    info->state_2d.src_bo = NULL;

    info->accel_state->dst_pix = pPix;

    FUNC_NAME(Emit2DState)(pScrn, RADEON_2D_EXA_SOLID);

    return TRUE;
}


static void
FUNC_NAME(RADEONSolid)(PixmapPtr pPix, int x1, int y1, int x2, int y2)
{
    RINFO_FROM_SCREEN(pPix->drawable.pScreen);
    ACCEL_PREAMBLE();

    TRACE;

#if defined(ACCEL_CP) && defined(XF86DRM_MODE)
    if (info->cs && CS_FULL(info->cs)) {
	FUNC_NAME(RADEONFlush2D)(info->accel_state->dst_pix);
	radeon_cs_flush_indirect(pScrn);
    }
#endif

    if (info->accel_state->vsync)
	FUNC_NAME(RADEONWaitForVLine)(pScrn, pPix,
				      radeon_pick_best_crtc(pScrn, x1, x2, y1, y2),
				      y1, y2);

    BEGIN_ACCEL(2);
    OUT_ACCEL_REG(RADEON_DST_Y_X, (y1 << 16) | x1);
    OUT_ACCEL_REG(RADEON_DST_HEIGHT_WIDTH, ((y2 - y1) << 16) | (x2 - x1));
    FINISH_ACCEL();
}

void
FUNC_NAME(RADEONDoPrepareCopy)(ScrnInfoPtr pScrn, uint32_t src_pitch_offset,
			       uint32_t dst_pitch_offset, uint32_t datatype, int rop,
			       Pixel planemask)
{
    RADEONInfoPtr info = RADEONPTR(pScrn);

    /* setup 2D state */
    info->state_2d.dp_gui_master_cntl = (RADEON_GMC_DST_PITCH_OFFSET_CNTL |
					  RADEON_GMC_SRC_PITCH_OFFSET_CNTL |
					  RADEON_GMC_BRUSH_NONE |
					  (datatype << 8) |
					  RADEON_GMC_SRC_DATATYPE_COLOR |
					  RADEON_ROP[rop].rop |
					  RADEON_DP_SRC_SOURCE_MEMORY |
					  RADEON_GMC_CLR_CMP_CNTL_DIS);
    info->state_2d.dp_cntl = ((info->accel_state->xdir >= 0 ? RADEON_DST_X_LEFT_TO_RIGHT : 0) |
			       (info->accel_state->ydir >= 0 ? RADEON_DST_Y_TOP_TO_BOTTOM : 0));
    info->state_2d.dp_brush_frgd_clr = 0xffffffff;
    info->state_2d.dp_brush_bkgd_clr = 0x00000000;
    info->state_2d.dp_src_frgd_clr = 0xffffffff;
    info->state_2d.dp_src_bkgd_clr = 0x00000000;
    info->state_2d.dp_write_mask = planemask;
    info->state_2d.dst_pitch_offset = dst_pitch_offset;
    info->state_2d.src_pitch_offset = src_pitch_offset;
    info->state_2d.default_sc_bottom_right =  (RADEON_DEFAULT_SC_RIGHT_MAX
						| RADEON_DEFAULT_SC_BOTTOM_MAX);

    FUNC_NAME(Emit2DState)(pScrn, RADEON_2D_EXA_COPY);
}

static Bool
FUNC_NAME(RADEONPrepareCopy)(PixmapPtr pSrc,   PixmapPtr pDst,
			     int xdir, int ydir,
			     int rop,
			     Pixel planemask)
{
    RINFO_FROM_SCREEN(pDst->drawable.pScreen);
    uint32_t datatype, src_pitch_offset, dst_pitch_offset;
    TRACE;

    if (pDst->drawable.bitsPerPixel == 24)
	RADEON_FALLBACK(("24bpp unsupported"));
    if (!RADEONGetDatatypeBpp(pDst->drawable.bitsPerPixel, &datatype))
	RADEON_FALLBACK(("RADEONGetDatatypeBpp failed\n"));
    if (!RADEONGetPixmapOffsetPitch(pSrc, &src_pitch_offset))
	RADEON_FALLBACK(("RADEONGetPixmapOffsetPitch source failed\n"));
    if (!RADEONGetPixmapOffsetPitch(pDst, &dst_pitch_offset))
	RADEON_FALLBACK(("RADEONGetPixmapOffsetPitch dest failed\n"));

    RADEON_SWITCH_TO_2D();

#ifdef XF86DRM_MODE
    if (info->cs) {
	struct radeon_exa_pixmap_priv *driver_priv;
	int ret;
      
	radeon_cs_space_reset_bos(info->cs);

	driver_priv = exaGetPixmapDriverPrivate(pSrc);
	radeon_cs_space_add_persistent_bo(info->cs, driver_priv->bo, RADEON_GEM_DOMAIN_GTT | RADEON_GEM_DOMAIN_VRAM, 0);
	info->state_2d.src_bo = driver_priv->bo;

	driver_priv = exaGetPixmapDriverPrivate(pDst);
	radeon_cs_space_add_persistent_bo(info->cs, driver_priv->bo, 0, RADEON_GEM_DOMAIN_VRAM);
	info->state_2d.dst_bo = driver_priv->bo;

	ret = radeon_cs_space_check(info->cs);
	if (ret)
	    RADEON_FALLBACK(("Not enough RAM to hw accel copy operation\n"));
    }
#endif

    info->accel_state->xdir = xdir;
    info->accel_state->ydir = ydir;
    info->accel_state->dst_pix = pDst;

    FUNC_NAME(RADEONDoPrepareCopy)(pScrn, src_pitch_offset, dst_pitch_offset,
				   datatype, rop, planemask);

    return TRUE;
}

void
FUNC_NAME(RADEONCopy)(PixmapPtr pDst,
		      int srcX, int srcY,
		      int dstX, int dstY,
		      int w, int h)
{
    RINFO_FROM_SCREEN(pDst->drawable.pScreen);
    ACCEL_PREAMBLE();

    TRACE;

#if defined(ACCEL_CP) && defined(XF86DRM_MODE)
    if (info->cs && CS_FULL(info->cs)) {
	FUNC_NAME(RADEONFlush2D)(info->accel_state->dst_pix);
	radeon_cs_flush_indirect(pScrn);
    }
#endif

    if (info->accel_state->xdir < 0) {
	srcX += w - 1;
	dstX += w - 1;
    }
    if (info->accel_state->ydir < 0) {
	srcY += h - 1;
	dstY += h - 1;
    }

    if (info->accel_state->vsync)
	FUNC_NAME(RADEONWaitForVLine)(pScrn, pDst,
				      radeon_pick_best_crtc(pScrn, dstX, dstX + w, dstY, dstY + h),
				      dstY, dstY + h);

    BEGIN_ACCEL(3);

    OUT_ACCEL_REG(RADEON_SRC_Y_X,	   (srcY << 16) | srcX);
    OUT_ACCEL_REG(RADEON_DST_Y_X,	   (dstY << 16) | dstX);
    OUT_ACCEL_REG(RADEON_DST_HEIGHT_WIDTH, (h  << 16) | w);

    FINISH_ACCEL();
}

#ifdef ACCEL_CP

static Bool
RADEONUploadToScreenCP(PixmapPtr pDst, int x, int y, int w, int h,
		       char *src, int src_pitch)
{
    RINFO_FROM_SCREEN(pDst->drawable.pScreen);
    unsigned int   bpp	     = pDst->drawable.bitsPerPixel;
    unsigned int   hpass;
    uint32_t	   buf_pitch, dst_pitch_off;

    TRACE;

    if (bpp < 8)
	return FALSE;

    if (info->directRenderingEnabled &&
	RADEONGetPixmapOffsetPitch(pDst, &dst_pitch_off)) {
	uint8_t *buf;
	int cpp = bpp / 8;
	ACCEL_PREAMBLE();

	RADEON_SWITCH_TO_2D();

	if (info->accel_state->vsync)
	    FUNC_NAME(RADEONWaitForVLine)(pScrn, pDst,
					  radeon_pick_best_crtc(pScrn, x, x + w, y, y + h),
					  y, y + h);

	while ((buf = RADEONHostDataBlit(pScrn,
					 cpp, w, dst_pitch_off, &buf_pitch,
					 x, &y, (unsigned int*)&h, &hpass)) != 0) {
	    RADEONHostDataBlitCopyPass(pScrn, cpp, buf, (uint8_t *)src,
				       hpass, buf_pitch, src_pitch);
	    src += hpass * src_pitch;
	}

	exaMarkSync(pDst->drawable.pScreen);
	return TRUE;
    }

    return FALSE;
}

/* Emit blit with arbitrary source and destination offsets and pitches */
static void
RADEONBlitChunk(ScrnInfoPtr pScrn, struct radeon_bo *src_bo,
                struct radeon_bo *dst_bo, uint32_t datatype,
                uint32_t src_pitch_offset, uint32_t dst_pitch_offset,
                int srcX, int srcY, int dstX, int dstY, int w, int h,
                uint32_t src_domain, uint32_t dst_domain)
{
    RADEONInfoPtr info = RADEONPTR(pScrn);
    ACCEL_PREAMBLE();

    if (src_bo && dst_bo) {
        BEGIN_ACCEL_RELOC(6, 2);
    } else if (src_bo && dst_bo == NULL) {
        BEGIN_ACCEL_RELOC(6, 1);
    } else {
        BEGIN_ACCEL(6);
    }
    OUT_ACCEL_REG(RADEON_DP_GUI_MASTER_CNTL,
		  RADEON_GMC_DST_PITCH_OFFSET_CNTL |
		  RADEON_GMC_SRC_PITCH_OFFSET_CNTL |
		  RADEON_GMC_BRUSH_NONE |
		  (datatype << 8) |
		  RADEON_GMC_SRC_DATATYPE_COLOR |
		  RADEON_ROP3_S |
		  RADEON_DP_SRC_SOURCE_MEMORY |
		  RADEON_GMC_CLR_CMP_CNTL_DIS |
		  RADEON_GMC_WR_MSK_DIS);
    OUT_ACCEL_REG(RADEON_SRC_PITCH_OFFSET, src_pitch_offset);
    if (src_bo) {
	OUT_RELOC(src_bo, src_domain, 0);
    }
    OUT_ACCEL_REG(RADEON_DST_PITCH_OFFSET, dst_pitch_offset);
    if (dst_bo) {
	OUT_RELOC(dst_bo, 0, dst_domain);
    }
    OUT_ACCEL_REG(RADEON_SRC_Y_X, (srcY << 16) | srcX);
    OUT_ACCEL_REG(RADEON_DST_Y_X, (dstY << 16) | dstX);
    OUT_ACCEL_REG(RADEON_DST_HEIGHT_WIDTH, (h << 16) | w);
    FINISH_ACCEL();
    BEGIN_ACCEL(2);
    OUT_ACCEL_REG(RADEON_DSTCACHE_CTLSTAT, RADEON_RB2D_DC_FLUSH_ALL);
    OUT_ACCEL_REG(RADEON_WAIT_UNTIL,
                  RADEON_WAIT_2D_IDLECLEAN | RADEON_WAIT_DMA_GUI_IDLE);
    FINISH_ACCEL();
}

#if defined(XF86DRM_MODE)
static Bool
RADEONUploadToScreenCS(PixmapPtr pDst, int x, int y, int w, int h,
		       char *src, int src_pitch)
{
    ScreenPtr pScreen = pDst->drawable.pScreen;
    RINFO_FROM_SCREEN(pScreen);
    struct radeon_exa_pixmap_priv *driver_priv;
    struct radeon_bo *scratch = NULL;
    struct radeon_bo *copy_dst;
    unsigned char *dst;
    unsigned size;
    uint32_t datatype = 0;
    uint32_t dst_domain;
    uint32_t dst_pitch_offset;
    unsigned bpp = pDst->drawable.bitsPerPixel;
    uint32_t scratch_pitch = RADEON_ALIGN(w * bpp / 8, 64);
    uint32_t copy_pitch;
    uint32_t swap = RADEON_HOST_DATA_SWAP_NONE;
    int ret;
    Bool flush = TRUE;
    Bool r;
    int i;

    if (bpp < 8)
	return FALSE;

    driver_priv = exaGetPixmapDriverPrivate(pDst);
    if (!driver_priv || !driver_priv->bo)
	return FALSE;

#if X_BYTE_ORDER == X_BIG_ENDIAN
    switch (bpp) {
    case 32:
	swap = RADEON_HOST_DATA_SWAP_32BIT;
	break;
    case 16:
	swap = RADEON_HOST_DATA_SWAP_16BIT;
	break;
    }
#endif

    /* If we know the BO won't be busy, don't bother with a scratch */
    copy_dst = driver_priv->bo;
    copy_pitch = pDst->devKind;
    if (!(driver_priv->tiling_flags & (RADEON_TILING_MACRO | RADEON_TILING_MICRO))) {
	if (!radeon_bo_is_referenced_by_cs(driver_priv->bo, info->cs)) {
	    flush = FALSE;
	    if (!radeon_bo_is_busy(driver_priv->bo, &dst_domain))
		goto copy;
	}
    }

    size = scratch_pitch * h;
    scratch = radeon_bo_open(info->bufmgr, 0, size, 0, RADEON_GEM_DOMAIN_GTT, 0);
    if (scratch == NULL) {
	goto copy;
    }
    radeon_cs_space_reset_bos(info->cs);
    radeon_add_pixmap(info->cs, pDst, 0, RADEON_GEM_DOMAIN_VRAM);
    radeon_cs_space_add_persistent_bo(info->cs, scratch, RADEON_GEM_DOMAIN_GTT, 0);
    ret = radeon_cs_space_check(info->cs);
    if (ret) {
	goto copy;
    }
    copy_dst = scratch;
    copy_pitch = scratch_pitch;
    flush = FALSE;

copy:
    if (flush)
	radeon_cs_flush_indirect(pScrn);

    ret = radeon_bo_map(copy_dst, 0);
    if (ret) {
        r = FALSE;
        goto out;
    }
    r = TRUE;
    size = w * bpp / 8;
    dst = copy_dst->ptr;
    if (copy_dst == driver_priv->bo)
	dst += y * copy_pitch + x * bpp / 8;
    for (i = 0; i < h; i++) {
        RADEONCopySwap(dst + i * copy_pitch, (uint8_t*)src, size, swap);
        src += src_pitch;
    }
    radeon_bo_unmap(copy_dst);

    if (copy_dst == scratch) {
	RADEONGetDatatypeBpp(pDst->drawable.bitsPerPixel, &datatype);
	RADEONGetPixmapOffsetPitch(pDst, &dst_pitch_offset);
	ACCEL_PREAMBLE();
	RADEON_SWITCH_TO_2D();
	RADEONBlitChunk(pScrn, scratch, driver_priv->bo, datatype, scratch_pitch << 16,
			dst_pitch_offset, 0, 0, x, y, w, h,
			RADEON_GEM_DOMAIN_GTT, RADEON_GEM_DOMAIN_VRAM);
    }

out:
    if (scratch)
	radeon_bo_unref(scratch);
    return r;
}

static Bool
RADEONDownloadFromScreenCS(PixmapPtr pSrc, int x, int y, int w,
                           int h, char *dst, int dst_pitch)
{
    RINFO_FROM_SCREEN(pSrc->drawable.pScreen);
    struct radeon_exa_pixmap_priv *driver_priv;
    struct radeon_bo *scratch = NULL;
    struct radeon_bo *copy_src;
    unsigned size;
    uint32_t datatype = 0;
    uint32_t src_domain = 0;
    uint32_t src_pitch_offset;
    unsigned bpp = pSrc->drawable.bitsPerPixel;
    uint32_t scratch_pitch = RADEON_ALIGN(w * bpp / 8, 64);
    uint32_t copy_pitch;
    uint32_t swap = RADEON_HOST_DATA_SWAP_NONE;
    int ret;
    Bool flush = FALSE;
    Bool r;

    if (bpp < 8)
	return FALSE;

    driver_priv = exaGetPixmapDriverPrivate(pSrc);
    if (!driver_priv || !driver_priv->bo)
	return FALSE;

#if X_BYTE_ORDER == X_BIG_ENDIAN
    switch (bpp) {
    case 32:
	swap = RADEON_HOST_DATA_SWAP_32BIT;
	break;
    case 16:
	swap = RADEON_HOST_DATA_SWAP_16BIT;
	break;
    }
#endif

    /* If we know the BO won't end up in VRAM anyway, don't bother with a scratch */
    copy_src = driver_priv->bo;
    copy_pitch = pSrc->devKind;
    if (!(driver_priv->tiling_flags & (RADEON_TILING_MACRO | RADEON_TILING_MICRO))) {
	if (radeon_bo_is_referenced_by_cs(driver_priv->bo, info->cs)) {
	    src_domain = radeon_bo_get_src_domain(driver_priv->bo);
	    if ((src_domain & (RADEON_GEM_DOMAIN_GTT | RADEON_GEM_DOMAIN_VRAM)) ==
		(RADEON_GEM_DOMAIN_GTT | RADEON_GEM_DOMAIN_VRAM))
		src_domain = 0;
	    else /* A write may be scheduled */
		flush = TRUE;
	}

	if (!src_domain)
	    radeon_bo_is_busy(driver_priv->bo, &src_domain);

	if (src_domain & ~(uint32_t)RADEON_GEM_DOMAIN_VRAM)
	    goto copy;
    }
    size = scratch_pitch * h;
    scratch = radeon_bo_open(info->bufmgr, 0, size, 0, RADEON_GEM_DOMAIN_GTT, 0);
    if (scratch == NULL) {
	goto copy;
    }
    radeon_cs_space_reset_bos(info->cs);
    radeon_add_pixmap(info->cs, pSrc, RADEON_GEM_DOMAIN_GTT | RADEON_GEM_DOMAIN_VRAM, 0);
    radeon_cs_space_add_persistent_bo(info->cs, scratch, 0, RADEON_GEM_DOMAIN_GTT);
    ret = radeon_cs_space_check(info->cs);
    if (ret) {
	goto copy;
    }
    RADEONGetDatatypeBpp(pSrc->drawable.bitsPerPixel, &datatype);
    RADEONGetPixmapOffsetPitch(pSrc, &src_pitch_offset);
    ACCEL_PREAMBLE();
    RADEON_SWITCH_TO_2D();
    RADEONBlitChunk(pScrn, driver_priv->bo, scratch, datatype, src_pitch_offset,
                    scratch_pitch << 16, x, y, 0, 0, w, h,
                    RADEON_GEM_DOMAIN_VRAM | RADEON_GEM_DOMAIN_GTT,
                    RADEON_GEM_DOMAIN_GTT);
    copy_src = scratch;
    copy_pitch = scratch_pitch;
    flush = TRUE;

copy:
    if (flush)
	FLUSH_RING();

    ret = radeon_bo_map(copy_src, 0);
    if (ret) {
	ErrorF("failed to map pixmap: %d\n", ret);
        r = FALSE;
        goto out;
    }
    r = TRUE;
    w *= bpp / 8;
    if (copy_src == driver_priv->bo)
	size = y * copy_pitch + x * bpp / 8;
    else
	size = 0;
    while (h--) {
        RADEONCopySwap((uint8_t*)dst, copy_src->ptr + size, w, swap);
        size += copy_pitch;
        dst += dst_pitch;
    }
    radeon_bo_unmap(copy_src);
out:
    if (scratch)
	radeon_bo_unref(scratch);
    return r;
}
#endif

static Bool
RADEONDownloadFromScreenCP(PixmapPtr pSrc, int x, int y, int w, int h,
				    char *dst, int dst_pitch)
{
    RINFO_FROM_SCREEN(pSrc->drawable.pScreen);
    uint8_t	  *src	     = info->FB + exaGetPixmapOffset(pSrc);
    int		   bpp	     = pSrc->drawable.bitsPerPixel;
    uint32_t datatype, src_pitch_offset, scratch_pitch = RADEON_ALIGN(w * bpp / 8, 64), scratch_off = 0;
    drmBufPtr scratch;

    TRACE;

    /*
     * Try to accelerate download. Use an indirect buffer as scratch space,
     * blitting the bits to one half while copying them out of the other one and
     * then swapping the halves.
     */
    if (bpp != 24 && RADEONGetDatatypeBpp(bpp, &datatype) &&
	RADEONGetPixmapOffsetPitch(pSrc, &src_pitch_offset) &&
	(scratch = RADEONCPGetBuffer(pScrn)))
    {
	int swap = RADEON_HOST_DATA_SWAP_NONE, wpass = w * bpp / 8;
	int hpass = min(h, scratch->total/2 / scratch_pitch);
	uint32_t scratch_pitch_offset = scratch_pitch << 16
				    | (info->gartLocation + info->dri->bufStart
				       + scratch->idx * scratch->total) >> 10;
	drm_radeon_indirect_t indirect;
	ACCEL_PREAMBLE();

	RADEON_SWITCH_TO_2D();

	/* Kick the first blit as early as possible */
	RADEONBlitChunk(pScrn, NULL, NULL, datatype, src_pitch_offset,
                        scratch_pitch_offset, x, y, 0, 0, w, hpass, 0, 0);
	FLUSH_RING();

#if X_BYTE_ORDER == X_BIG_ENDIAN
	switch (bpp) {
	case 16:
	  swap = RADEON_HOST_DATA_SWAP_16BIT;
	  break;
	case 32:
	  swap = RADEON_HOST_DATA_SWAP_32BIT;
	  break;
	}
#endif

	while (h) {
	    int oldhpass = hpass, i = 0;

	    src = (uint8_t*)scratch->address + scratch_off;

	    y += oldhpass;
	    h -= oldhpass;
	    hpass = min(h, scratch->total/2 / scratch_pitch);

	    /* Prepare next blit if anything's left */
	    if (hpass) {
		scratch_off = scratch->total/2 - scratch_off;
		RADEONBlitChunk(pScrn, NULL, NULL, datatype, src_pitch_offset,
                                scratch_pitch_offset + (scratch_off >> 10),
				x, y, 0, 0, w, hpass, 0, 0);
	    }

	    /*
	     * Wait for previous blit to complete.
	     *
	     * XXX: Doing here essentially the same things this ioctl does in
	     * the DRM results in corruption with 'small' transfers, apparently
	     * because the data doesn't actually land in system RAM before the
	     * memcpy. I suspect the ioctl helps mostly due to its latency; what
	     * we'd really need is a way to reliably wait for the host interface
	     * to be done with pushing the data to the host.
	     */
	    while ((drmCommandNone(info->dri->drmFD, DRM_RADEON_CP_IDLE) == -EBUSY)
		   && (i++ < RADEON_TIMEOUT))
		;

	    /* Kick next blit */
	    if (hpass)
		FLUSH_RING();

	    /* Copy out data from previous blit */
	    if (wpass == scratch_pitch && wpass == dst_pitch) {
		RADEONCopySwap((uint8_t*)dst, src, wpass * oldhpass, swap);
		dst += dst_pitch * oldhpass;
	    } else while (oldhpass--) {
		RADEONCopySwap((uint8_t*)dst, src, wpass, swap);
		src += scratch_pitch;
		dst += dst_pitch;
	    }
	}

	indirect.idx = scratch->idx;
	indirect.start = indirect.end = 0;
	indirect.discard = 1;

	drmCommandWriteRead(info->dri->drmFD, DRM_RADEON_INDIRECT,
			    &indirect, sizeof(drm_radeon_indirect_t));

	info->accel_state->exaMarkerSynced = info->accel_state->exaSyncMarker;

	return TRUE;
    }

    return FALSE;
}

#endif	/* def ACCEL_CP */


Bool FUNC_NAME(RADEONDrawInit)(ScreenPtr pScreen)
{
    RINFO_FROM_SCREEN(pScreen);

    if (info->accel_state->exa == NULL) {
	xf86DrvMsg(pScreen->myNum, X_ERROR, "Memory map not set up\n");
	return FALSE;
    }

    info->accel_state->exa->exa_major = EXA_VERSION_MAJOR;
    info->accel_state->exa->exa_minor = EXA_VERSION_MINOR;

    info->accel_state->exa->PrepareSolid = FUNC_NAME(RADEONPrepareSolid);
    info->accel_state->exa->Solid = FUNC_NAME(RADEONSolid);
    info->accel_state->exa->DoneSolid = FUNC_NAME(RADEONDone2D);

    info->accel_state->exa->PrepareCopy = FUNC_NAME(RADEONPrepareCopy);
    info->accel_state->exa->Copy = FUNC_NAME(RADEONCopy);
    info->accel_state->exa->DoneCopy = FUNC_NAME(RADEONDone2D);

    info->accel_state->exa->MarkSync = FUNC_NAME(RADEONMarkSync);
    info->accel_state->exa->WaitMarker = FUNC_NAME(RADEONSync);
#ifdef ACCEL_CP
    if (!info->kms_enabled) {
	info->accel_state->exa->UploadToScreen = RADEONUploadToScreenCP;
	if (info->accelDFS)
	    info->accel_state->exa->DownloadFromScreen = RADEONDownloadFromScreenCP;
    }
# if defined(XF86DRM_MODE)
    else {
	info->accel_state->exa->UploadToScreen = &RADEONUploadToScreenCS;
        info->accel_state->exa->DownloadFromScreen = &RADEONDownloadFromScreenCS;
    }
# endif
#endif

#if X_BYTE_ORDER == X_BIG_ENDIAN
    info->accel_state->exa->PrepareAccess = RADEONPrepareAccess_BE;
    info->accel_state->exa->FinishAccess = RADEONFinishAccess_BE;
#endif

    info->accel_state->exa->flags = EXA_OFFSCREEN_PIXMAPS;
#ifdef EXA_SUPPORTS_PREPARE_AUX
    info->accel_state->exa->flags |= EXA_SUPPORTS_PREPARE_AUX;
#endif
#ifdef EXA_SUPPORTS_OFFSCREEN_OVERLAPS
    /* The 2D engine supports overlapping memory areas */
    info->accel_state->exa->flags |= EXA_SUPPORTS_OFFSCREEN_OVERLAPS;
#endif
    info->accel_state->exa->pixmapOffsetAlign = RADEON_GPU_PAGE_SIZE;
    info->accel_state->exa->pixmapPitchAlign = 64;

#ifdef EXA_HANDLES_PIXMAPS
    if (info->cs) {
	info->accel_state->exa->flags |= EXA_HANDLES_PIXMAPS;
#ifdef EXA_MIXED_PIXMAPS
	info->accel_state->exa->flags |= EXA_MIXED_PIXMAPS;
#endif
    }
#endif

#ifdef RENDER
    if (info->RenderAccel) {
	if (IS_R300_3D || IS_R500_3D) {
	    if ((info->ChipFamily < CHIP_FAMILY_RS400)
#ifdef XF86DRI
		|| (info->directRenderingEnabled)
#endif
		) {
		xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Render acceleration "
			       "enabled for R300/R400/R500 type cards.\n");
		info->accel_state->exa->CheckComposite = R300CheckComposite;
		info->accel_state->exa->PrepareComposite =
		    FUNC_NAME(R300PrepareComposite);
		info->accel_state->exa->Composite = FUNC_NAME(RadeonComposite);
		info->accel_state->exa->DoneComposite = FUNC_NAME(RadeonDoneComposite);
	    } else
		xf86DrvMsg(pScrn->scrnIndex, X_INFO, "EXA Composite requires CP on R5xx/IGP\n");
	} else if (IS_R200_3D) {
		xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Render acceleration "
			       "enabled for R200 type cards.\n");
		info->accel_state->exa->CheckComposite = R200CheckComposite;
		info->accel_state->exa->PrepareComposite =
		    FUNC_NAME(R200PrepareComposite);
		info->accel_state->exa->Composite = FUNC_NAME(RadeonComposite);
		info->accel_state->exa->DoneComposite = FUNC_NAME(RadeonDoneComposite);
	} else {
		xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Render acceleration "
			       "enabled for R100 type cards.\n");
		info->accel_state->exa->CheckComposite = R100CheckComposite;
		info->accel_state->exa->PrepareComposite =
		    FUNC_NAME(R100PrepareComposite);
		info->accel_state->exa->Composite = FUNC_NAME(RadeonComposite);
		info->accel_state->exa->DoneComposite = FUNC_NAME(RadeonDoneComposite);
	}
    }
#endif

#ifdef XF86DRM_MODE
#if (EXA_VERSION_MAJOR == 2 && EXA_VERSION_MINOR >= 4)
    if (info->cs) {
        info->accel_state->exa->CreatePixmap = RADEONEXACreatePixmap;
        info->accel_state->exa->DestroyPixmap = RADEONEXADestroyPixmap;
        info->accel_state->exa->PixmapIsOffscreen = RADEONEXAPixmapIsOffscreen;
	info->accel_state->exa->PrepareAccess = RADEONPrepareAccess_CS;
	info->accel_state->exa->FinishAccess = RADEONFinishAccess_CS;
#if (EXA_VERSION_MAJOR == 2 && EXA_VERSION_MINOR >= 5)
        info->accel_state->exa->CreatePixmap2 = RADEONEXACreatePixmap2;
#endif
    }
#endif
#endif


#if EXA_VERSION_MAJOR > 2 || (EXA_VERSION_MAJOR == 2 && EXA_VERSION_MINOR >= 3)
    xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Setting EXA maxPitchBytes\n");

    info->accel_state->exa->maxPitchBytes = 16320;
    info->accel_state->exa->maxX = 8191;
#else
    info->accel_state->exa->maxX = 16320 / 4;
#endif
    info->accel_state->exa->maxY = 8191;

    if (xf86ReturnOptValBool(info->Options, OPTION_EXA_VSYNC, FALSE)) {
	xf86DrvMsg(pScrn->scrnIndex, X_INFO, "EXA VSync enabled\n");
	info->accel_state->vsync = TRUE;
    } else
	info->accel_state->vsync = FALSE;

    RADEONEngineInit(pScrn);

    if (!exaDriverInit(pScreen, info->accel_state->exa)) {
	free(info->accel_state->exa);
	return FALSE;
    }
    exaMarkSync(pScreen);

    return TRUE;
}

#undef FUNC_NAME