/**************************************************************************
 * 
 * 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
 * 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.
 * 
 **************************************************************************/

/* Author:
 *    Keith Whitwell <keith@tungstengraphics.com>
 */


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

/* There will be actual work to do here.  In future we may want a
 * fence-like interface instead of finish, and perhaps flush will take
 * flags to indicate what type of flush is required.
 */
static void i915_flush( struct pipe_context *pipe,
			unsigned flags )
{
   struct i915_context *i915 = i915_context(pipe);

   /* 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();
	 assert(BEGIN_BATCH(1, 0));
      }
      OUT_BATCH( flush );
      ADVANCE_BATCH();
   }

   /* If there are no flags, just flush pending commands to hardware:
    */
   FLUSH_BATCH();

   if (flags & PIPE_FLUSH_WAIT) {
      i915->winsys->batch_finish(i915->winsys);
   }
}



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