tests/gem_ringfill.c

/*
 * 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>
 *
 */

/** @file gem_ringfill.c
 *
 * This is a test of doing many tiny batchbuffer operations, in the hope of
 * catching failure to manage the ring properly near full.
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
#include "intel_bufmgr.h"
#include "intel_batchbuffer.h"
#include "intel_gpu_tools.h"

static drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
static const int width = 512, height = 512;
static const int size = 1024 * 1024;

int main(int argc, char **argv)
{
	int fd;
	int i;
	drm_intel_bo *src_bo, *dst_bo;

	fd = drm_open_any();
	intel_get_drm_devid(fd);

	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
	drm_intel_bufmgr_gem_enable_reuse(bufmgr);
	batch = intel_batchbuffer_alloc(bufmgr);

	src_bo = drm_intel_bo_alloc(bufmgr, "src bo", size, 4096);
	dst_bo = drm_intel_bo_alloc(bufmgr, "src bo", size, 4096);

	/* The ring we've been using is 128k, and each rendering op
	 * will use at least 8 dwords:
	 *
	 * BATCH_START
	 * BATCH_START offset
	 * MI_FLUSH
	 * STORE_DATA_INDEX
	 * STORE_DATA_INDEX offset
	 * STORE_DATA_INDEX value
	 * MI_USER_INTERRUPT
	 * (padding)
	 *
	 * So iterate just a little more than that -- if we don't fill the ring
	 * doing this, we aren't likely to with this test.
	 */
	for (i = 0; i < 128 * 1024 / (8 * 4) * 1.25; i++) {
		intel_copy_bo(batch, dst_bo, src_bo, width, height);
		intel_batchbuffer_flush(batch);
	}

	intel_batchbuffer_free(batch);
	drm_intel_bufmgr_destroy(bufmgr);

	close(fd);

	return 0;
}