tests/gem_multi_bsd_sync_loop.c

/*
 * Copyright © 2014 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:
 *    Daniel Vetter <daniel.vetter@ffwll.ch> (based on gem_ring_sync_loop_*.c)
 *    Zhao Yakui <yakui.zhao@intel.com>
 *
 */

#include "igt.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "drm.h"
#include "intel_bufmgr.h"
#include "i830_reg.h"

IGT_TEST_DESCRIPTION("Basic check of ring<->ring sync using a dummy reloc.");

static drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
static drm_intel_bo *target_buffer;

#define NUM_FD	50

static int mfd[NUM_FD];
static drm_intel_bufmgr *mbufmgr[NUM_FD];
static struct intel_batchbuffer *mbatch[NUM_FD];
static drm_intel_bo *mbuffer[NUM_FD];


/*
 * Testcase: Basic check of ring<->ring sync using a dummy reloc
 *
 * Extremely efficient at catching missed irqs with semaphores=0 ...
 */

#define MI_COND_BATCH_BUFFER_END	(0x36<<23 | 1)
#define MI_DO_COMPARE			(1<<21)

static void
store_dword_loop(int fd)
{
	int i;
	int num_rings = gem_get_num_rings(fd);

	srandom(0xdeadbeef);

	for (i = 0; i < SLOW_QUICK(0x100000, 10); i++) {
		int ring, mindex;
		ring = random() % num_rings + 1;
		mindex = random() % NUM_FD;
		batch = mbatch[mindex];
		if (ring == I915_EXEC_RENDER) {
			BEGIN_BATCH(4, 1);
			OUT_BATCH(MI_COND_BATCH_BUFFER_END | MI_DO_COMPARE);
			OUT_BATCH(0xffffffff); /* compare dword */
			OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
					I915_GEM_DOMAIN_RENDER, 0);
			OUT_BATCH(MI_NOOP);
			ADVANCE_BATCH();
		} else {
			BEGIN_BATCH(4, 1);
			OUT_BATCH(MI_FLUSH_DW | 1);
			OUT_BATCH(0); /* reserved */
			OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
					I915_GEM_DOMAIN_RENDER, 0);
			OUT_BATCH(MI_NOOP | (1<<22) | (0xf));
			ADVANCE_BATCH();
		}
		intel_batchbuffer_flush_on_ring(batch, ring);
	}

	drm_intel_bo_map(target_buffer, 0);
	// map to force waiting on rendering
	drm_intel_bo_unmap(target_buffer);
}

igt_simple_main
{
	int fd;
	int devid;
	int i;

	fd = drm_open_driver(DRIVER_INTEL);
	devid = intel_get_drm_devid(fd);
	gem_require_ring(fd, I915_EXEC_BLT);


	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
	igt_assert_f(bufmgr, "fail to initialize the buf manager\n");
	drm_intel_bufmgr_gem_enable_reuse(bufmgr);


	target_buffer = drm_intel_bo_alloc(bufmgr, "target bo", 4096, 4096);
	igt_assert_f(target_buffer, "fail to create the gem bo\n");

	/* Create multiple drm_fd and map one gem_object among multi drm_fd */
	{
		unsigned int target_flink;
		char buffer_name[32];
		igt_assert(dri_bo_flink(target_buffer, &target_flink) == 0);

		for (i = 0; i < NUM_FD; i++) {
			sprintf(buffer_name, "Target buffer %d\n", i);
			mfd[i] = drm_open_driver(DRIVER_INTEL);
			mbufmgr[i] = drm_intel_bufmgr_gem_init(mfd[i], 4096);
			igt_assert_f(mbufmgr[i],
				     "fail to initialize buf manager for drm_fd %d\n",
				     mfd[i]);
			drm_intel_bufmgr_gem_enable_reuse(mbufmgr[i]);
			mbatch[i] = intel_batchbuffer_alloc(mbufmgr[i], devid);
			igt_assert_f(mbatch[i],
				     "fail to create batchbuffer for drm_fd %d\n",
				     mfd[i]);
			mbuffer[i] = intel_bo_gem_create_from_name(mbufmgr[i], buffer_name, target_flink);
			igt_assert_f(mbuffer[i],
				     "fail to create buffer bo from global "
				     "gem handle %d for drm_fd %d\n",
                                     target_flink, mfd[i]);
		}
	}

	store_dword_loop(fd);

	{
		for (i = 0; i < NUM_FD; i++) {
			dri_bo_unreference(mbuffer[i]);
			intel_batchbuffer_free(mbatch[i]);
			drm_intel_bufmgr_destroy(mbufmgr[i]);
			close(mfd[i]);
		}
	}
	drm_intel_bo_unreference(target_buffer);
	drm_intel_bufmgr_destroy(bufmgr);

	close(fd);
}