i915_flush.c

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/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, 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"), 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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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/* Author:
 *    Keith Whitwell <keith@tungstengraphics.com>
 */


#include "pipe/p_defines.h"
#include "draw/draw_context.h"
#include "i915_context.h"
#include "i915_reg.h"
#include "i915_batch.h"


static void i915_flush( struct pipe_context *pipe,
                        unsigned flags,
                        struct pipe_fence_handle **fence )
{
   struct i915_context *i915 = i915_context(pipe);

   draw_flush(i915->draw);

   /* Do we need to emit an MI_FLUSH command to flush the hardware
    * caches?
    */
   if (flags & (PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_TEXTURE_CACHE)) {
      unsigned flush = MI_FLUSH;
      
      if (!(flags & PIPE_FLUSH_RENDER_CACHE))
         flush |= INHIBIT_FLUSH_RENDER_CACHE;

      if (flags & PIPE_FLUSH_TEXTURE_CACHE)
         flush |= FLUSH_MAP_CACHE;

      if (!BEGIN_BATCH(1, 0)) {
         FLUSH_BATCH(NULL);
         assert(BEGIN_BATCH(1, 0));
      }
      OUT_BATCH( flush );
   }

   /* If there are no flags, just flush pending commands to hardware:
    */
   FLUSH_BATCH(fence);
   i915->vbo_flushed = 1;
}



void i915_init_flush_functions( struct i915_context *i915 )
{
   i915->pipe.flush = i915_flush;
}

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