tests: Add drm_import_export

Multithreaded test to validate the (lack of) locking in the flink/open
code in libdrm-intel. Based on a testcase from Rafel Sapala.

Cc: Rafal Sapala <rafal.a.sapala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

tests/.gitignore

@@ -4,6 +4,7 @@ core_getclient
 core_getstats
 core_getversion
 ddi_compute_wrpll
+drm_import_export
 drm_vma_limiter
 drm_vma_limiter_cached
 drm_vma_limiter_cpu

tests/Makefile.am

@@ -44,6 +44,8 @@ LDADD = ../lib/libintel_tools.la $(PCIACCESS_LIBS) $(DRM_LIBS)
 LDADD += $(CAIRO_LIBS) $(LIBUDEV_LIBS) $(GLIB_LIBS)
 AM_CFLAGS += $(CAIRO_CFLAGS) $(LIBUDEV_CFLAGS) $(GLIB_CFLAGS)
 
+drm_import_export_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
+drm_import_export_LDADD = $(LDADD) -lpthread
 gem_close_race_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
 gem_close_race_LDADD = $(LDADD) -lpthread
 gem_ctx_basic_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)

tests/Makefile.sources

@@ -89,6 +89,7 @@ TESTS_progs = \
 	core_getclient \
 	core_getstats \
 	core_getversion \
+	drm_import_export \
 	drm_vma_limiter \
 	drm_vma_limiter_cached \
 	drm_vma_limiter_cpu \

tests/drm_import_export.c

@@ -0,0 +1,145 @@
+/*
+ * 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>
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libdrm/drm.h>
+#include <libdrm/i915_drm.h>
+#include <xf86drm.h>
+#include <intel_bufmgr.h>
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include "igt_core.h"
+#include "drmtest.h"
+
+int fd;
+drm_intel_bufmgr *bufmgr;
+int fd1;
+drm_intel_bufmgr *bufmgr1;
+
+static void new_buffers(void)
+{
+	unsigned int *buf1;
+	drm_intel_bo *bo1, *bo2;
+
+
+	bo1 = drm_intel_bo_alloc(bufmgr, "buf1",16384, 4096);
+	igt_assert(bo1);
+	drm_intel_bo_map(bo1, 1);
+	bo2 = drm_intel_bo_alloc(bufmgr, "buf2", 16384, 4096);
+	igt_assert(bo2);
+	drm_intel_bo_map(bo2, 1);
+
+	buf1 = (unsigned int *)bo1->virtual;
+	igt_assert(buf1);
+	memset(buf1, 0, 16384);
+	buf1[4000]=0x05000000;
+
+	drm_intel_bo_exec(bo1, 16384, NULL, 0,0);
+	drm_intel_bo_wait_rendering(bo1);
+
+	drm_intel_bo_unmap( bo1 );
+	drm_intel_bo_unreference(bo1);
+
+	drm_intel_bo_unmap( bo2 );
+	drm_intel_bo_unreference(bo2);
+}
+
+static void test_surfaces(drm_intel_bo *bo_shared)
+{
+	drm_intel_bo * bo;
+	int loop=2;
+
+	while(loop--) {
+		struct drm_gem_open op;
+
+		drm_intel_bo_flink(bo_shared, &op.name);
+		bo = drm_intel_bo_gem_create_from_name( bufmgr, "shared resource" , op.name );
+		new_buffers();
+		drm_intel_bo_unreference( bo );
+	}
+}
+
+static void start_test(void)
+{
+	int i;
+
+	for (i=0; i < 16384; i++)
+	{
+		drm_intel_bo * bo_shared;
+
+		bo_shared = drm_intel_bo_alloc(bufmgr1, "buf-shared",16384, 4096);
+		test_surfaces(bo_shared);
+		drm_intel_bo_unreference(bo_shared);
+	}
+}
+
+static void * test_thread(void * par)
+{
+	igt_debug("start %ld\n", syscall(SYS_gettid));
+	start_test();
+
+	return NULL;
+}
+
+igt_simple_main {
+	pthread_t test_thread_id1;
+	pthread_t test_thread_id2;
+	pthread_t test_thread_id3;
+	pthread_t test_thread_id4;
+
+	fd1 = drm_open_any();
+	igt_assert(fd1 >= 0);
+	bufmgr1 = drm_intel_bufmgr_gem_init( fd1, 8 *1024);
+	igt_assert(bufmgr1);
+
+	drm_intel_bufmgr_gem_enable_reuse( bufmgr1);
+
+	fd = drm_open_any();
+	igt_assert(fd >= 0);
+	bufmgr = drm_intel_bufmgr_gem_init( fd, 8 *1024);
+	igt_assert(bufmgr);
+
+	drm_intel_bufmgr_gem_enable_reuse( bufmgr);
+
+	pthread_create(&test_thread_id1, NULL, test_thread, NULL);
+	pthread_create(&test_thread_id2, NULL, test_thread, NULL);
+	pthread_create(&test_thread_id3, NULL, test_thread, NULL);
+	pthread_create(&test_thread_id4, NULL, test_thread, NULL);
+
+	pthread_join(test_thread_id1, NULL);
+	pthread_join(test_thread_id2, NULL);
+	pthread_join(test_thread_id3, NULL);
+	pthread_join(test_thread_id4, NULL);
+}