/*
 * Copyright © 2009 Intel Corporation
 *
 * 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 <eric@anholt.net>
 *
 */

#include "main/macros.h"
#include "intel_batchbuffer.h"
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"

static void
prepare_urb( struct brw_context *brw )
{
   int urb_size, max_urb_entry;
   struct intel_context *intel = &brw->intel;

   if (IS_GT1(intel->intelScreen->deviceID)) {
	urb_size = 32 * 1024;
	max_urb_entry = 128;
   } else {
	urb_size = 64 * 1024;
	max_urb_entry = 256;
   }

   brw->urb.nr_vs_entries = max_urb_entry;
   brw->urb.nr_gs_entries = max_urb_entry;

   /* CACHE_NEW_VS_PROG */
   brw->urb.vs_size = MAX2(brw->vs.prog_data->urb_entry_size, 1);

   if (2 * brw->urb.vs_size > urb_size)
	   brw->urb.nr_vs_entries = brw->urb.nr_gs_entries = 
		(urb_size ) / (2 * brw->urb.vs_size);
}

static void
upload_urb(struct brw_context *brw)
{
   struct intel_context *intel = &brw->intel;

   assert(brw->urb.nr_vs_entries % 4 == 0);
   assert(brw->urb.nr_gs_entries % 4 == 0);
   /* GS requirement */
   assert(!brw->gs.prog_bo || brw->urb.vs_size < 5);

   BEGIN_BATCH(3);
   OUT_BATCH(_3DSTATE_URB << 16 | (3 - 2));
   OUT_BATCH(((brw->urb.vs_size - 1) << GEN6_URB_VS_SIZE_SHIFT) |
	     ((brw->urb.nr_vs_entries) << GEN6_URB_VS_ENTRIES_SHIFT));
   OUT_BATCH(((brw->urb.vs_size - 1) << GEN6_URB_GS_SIZE_SHIFT) |
	     ((brw->urb.nr_gs_entries) << GEN6_URB_GS_ENTRIES_SHIFT));
   ADVANCE_BATCH();
}

const struct brw_tracked_state gen6_urb = {
   .dirty = {
      .mesa = 0,
      .brw = BRW_NEW_CONTEXT,
      .cache = (CACHE_NEW_VS_PROG | CACHE_NEW_GS_PROG),
   },
   .prepare = prepare_urb,
   .emit = upload_urb,
};