/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 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, sub license,
 * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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.
 */

#ifndef _VIAIOCTL_H
#define _VIAIOCTL_H

#include "via_context.h"


void viaFinishPrimitive(viaContextPtr vmesa);
void viaFlushPrims(viaContextPtr vmesa);
void viaFlushPrimsLocked(viaContextPtr vmesa);

void viaInitIoctlFuncs(GLcontext *ctx);
void viaCopyBuffer(const __DRIdrawablePrivate *dpriv);
void viaPageFlip(const __DRIdrawablePrivate *dpriv);
void viaFillFrontBuffer(viaContextPtr vmesa);
void viaFillFrontPBuffer(viaContextPtr vmesa);
void viaFillBackBuffer(viaContextPtr vmesa);
void viaFillDepthBuffer(viaContextPtr vmesa, GLuint pixel, GLuint mask);
void viaDoSwapBuffers(viaContextPtr vmesa);
void viaDoSwapPBuffers(viaContextPtr vmesa);
void viaCheckDma(viaContextPtr vmesa, GLuint bytes);

#define VIA_FINISH_PRIM(vmesa) do {		\
   if (vmesa->dmaLastPrim)			\
      viaFinishPrimitive( vmesa );		\
} while (0)

#define VIA_FLUSH_DMA(vmesa) do {		\
   VIA_FINISH_PRIM(vmesa);			\
   if (vmesa->dmaLow != DMA_OFFSET) 		\
      viaFlushPrims(vmesa);			\
} while (0)
    

GLuint *viaAllocDmaFunc(viaContextPtr vmesa, int bytes, const char *func, int line);
#define viaAllocDma( v, b ) viaAllocDmaFunc(v, b, __FUNCTION__, __LINE__)



/* Room for the cliprect and other preamble at the head of each dma
 * buffer:   (What about buffers which only contain blits?)
 */
#define DMA_OFFSET 32

#define RING_VARS GLuint *_vb = 0, _nr, _x;

#define BEGIN_RING(n) do {				\
   if (_vb != 0) abort();				\
   _vb = viaAllocDma(vmesa, (n) * sizeof(GLuint));	\
   _nr = (n);						\
   _x = 0;						\
} while (0)

#define BEGIN_RING_NOCHECK(n) do {			\
   if (_vb != 0) abort();				\
   _vb = (GLuint *)(vmesa->dmaAddr + vmesa->dmaLow);	\
   vmesa->dmaLow += (n) * sizeof(GLuint);		\
   _nr = (n);						\
   _x = 0;						\
} while (0)

#define OUT_RING(n) _vb[_x++] = (n)

#define ADVANCE_RING() do {			\
   if (_x != _nr) abort(); 			\
   _vb = 0;						\
} while (0)

#define ADVANCE_RING_VARIABLE() do {			\
   if (_x > _nr) abort();				\
   vmesa->dmaLow -= (_nr - _x) * sizeof(GLuint);	\
   _vb = 0;						\
} while (0)


#define QWORD_PAD_RING() do {			\
   if (vmesa->dmaLow & 0x4) {			\
      BEGIN_RING(1);				\
      OUT_RING(HC_DUMMY);			\
      ADVANCE_RING();				\
   }						\
} while (0)




#endif