/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_ioctl.h,v 1.3 2001/04/01 14:00:00 tsi Exp $ */
/**************************************************************************

Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
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"),
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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,
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**************************************************************************/

/*
 * Authors:
 *   Gareth Hughes <gareth@valinux.com>
 *
 */

#ifndef __R128_IOCTL_H__
#define __R128_IOCTL_H__

#ifdef GLX_DIRECT_RENDERING

#include "r128_dri.h"
#include "r128_reg.h"
#include "r128_lock.h"

#include "xf86drm.h"
#include "xf86drmR128.h"

#define R128_BUFFER_MAX_DWORDS	(R128_BUFFER_SIZE / sizeof(CARD32))


extern drmBufPtr r128GetBufferLocked( r128ContextPtr rmesa );
extern void r128FlushVerticesLocked( r128ContextPtr rmesa );

extern void r128GetEltBufLocked( r128ContextPtr rmesa );
extern void r128FlushEltsLocked( r128ContextPtr rmesa );
extern void r128FireEltsLocked( r128ContextPtr rmesa,
				GLuint start, GLuint end,
				GLuint discard );
extern void r128ReleaseBufLocked( r128ContextPtr rmesa, drmBufPtr buffer );

/* Make this available as both a regular and an inline function.
 */
extern CARD32 *r128AllocVertices( r128ContextPtr rmesa, int count );

static __inline CARD32 *r128AllocVerticesInline( r128ContextPtr rmesa,
						 int count )
{
   int bytes = count * rmesa->vertsize * sizeof(CARD32);
   CARD32 *head;

   if ( !rmesa->vert_buf ) {
      LOCK_HARDWARE( rmesa );

      if ( rmesa->first_elt != rmesa->next_elt ) {
	 r128FlushEltsLocked( rmesa );
      }

      rmesa->vert_buf = r128GetBufferLocked( rmesa );

      UNLOCK_HARDWARE( rmesa );
   } else if ( rmesa->vert_buf->used + bytes > rmesa->vert_buf->total ) {
      LOCK_HARDWARE( rmesa );

      r128FlushVerticesLocked( rmesa );
      rmesa->vert_buf = r128GetBufferLocked( rmesa );

      UNLOCK_HARDWARE( rmesa );
   }

   head = (CARD32 *)((char *)rmesa->vert_buf->address +
		     rmesa->vert_buf->used);

   rmesa->num_verts += count;
   rmesa->vert_buf->used += bytes;
   return head;
}

extern void r128FireBlitLocked( r128ContextPtr rmesa, drmBufPtr buffer,
				GLint offset, GLint pitch, GLint format,
				GLint x, GLint y, GLint width, GLint height );

extern void r128WriteDepthSpanLocked( r128ContextPtr rmesa,
				      GLuint n, GLint x, GLint y,
				      const GLdepth depth[],
				      const GLubyte mask[] );
extern void r128WriteDepthPixelsLocked( r128ContextPtr rmesa, GLuint n,
					const GLint x[], const GLint y[],
					const GLdepth depth[],
					const GLubyte mask[] );
extern void r128ReadDepthSpanLocked( r128ContextPtr rmesa,
				     GLuint n, GLint x, GLint y );
extern void r128ReadDepthPixelsLocked( r128ContextPtr rmesa, GLuint n,
				       const GLint x[], const GLint y[] );

extern void r128SwapBuffers( r128ContextPtr rmesa );
extern void r128PageFlip( r128ContextPtr rmesa );

extern void r128WaitForIdleLocked( r128ContextPtr rmesa );


extern void r128DDInitIoctlFuncs( GLcontext *ctx );


/* ================================================================
 * Helper macros:
 */

#define FLUSH_BATCH( rmesa )						\
do {									\
   if ( R128_DEBUG & DEBUG_VERBOSE_IOCTL )				\
      fprintf( stderr, "FLUSH_BATCH in %s\n", __FUNCTION__ );		\
   if ( rmesa->vert_buf ) {						\
      r128FlushVertices( rmesa );					\
   } else if ( rmesa->next_elt != rmesa->first_elt ) {			\
      r128FlushElts( rmesa );						\
   }									\
} while (0)

/* 64-bit align the next element address, and then make room for the
 * next indexed prim packet header.
 */
#define ALIGN_NEXT_ELT( rmesa )						\
do {									\
   rmesa->next_elt = (GLushort *)					\
      (((unsigned long)rmesa->next_elt + 7) & ~0x7);			\
   rmesa->next_elt = (GLushort *)					\
      ((GLubyte *)rmesa->next_elt + R128_INDEX_PRIM_OFFSET);		\
} while (0)

#define r128FlushVertices( rmesa )					\
do {									\
   LOCK_HARDWARE( rmesa );						\
   r128FlushVerticesLocked( rmesa );					\
   UNLOCK_HARDWARE( rmesa );						\
} while (0)

#define r128FlushElts( rmesa )						\
do {									\
   LOCK_HARDWARE( rmesa );						\
   r128FlushEltsLocked( rmesa );					\
   UNLOCK_HARDWARE( rmesa );						\
} while (0)

#define r128WaitForIdle( rmesa )					\
   do {									\
      LOCK_HARDWARE( rmesa );						\
      r128WaitForIdleLocked( rmesa );					\
      UNLOCK_HARDWARE( rmesa );						\
   } while (0)

#endif
#endif /* __R128_IOCTL_H__ */
