tests/gem_suspend: exercise fence restore code

This exercise the bug fixed in

commit 94a335dba34ff47cad3d6d0c29b452d43a1be3c8
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Jul 17 14:51:28 2013 +0200

    drm/i915: correctly restore fences with objects attached

For fun I've also added a subtest for the inverse transition.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

lib/drmtest.c

@@ -1655,3 +1655,10 @@ int drmtest_enable_prefault(void)
 	return drmtest_prefault_control(true);
 }
 
+void drmtest_system_suspend_autoresume(void)
+{
+	int ret;
+
+	ret = system("rtcwake -s 30 -m mem");
+	assert(ret == 0);
+}

lib/drmtest.h

@@ -189,3 +189,6 @@ int drmtest_set_vt_graphics_mode(void);
 /* prefault disabling, needs the corresponding debugfs interface */
 int drmtest_disable_prefault(void);
 int drmtest_enable_prefault(void);
+
+/* suspend and auto-resume system */
+void drmtest_system_suspend_autoresume(void);

tests/.gitignore

@@ -64,6 +64,7 @@ gem_storedw_loop_bsd
 gem_storedw_loop_render
 gem_storedw_loop_vebox
 gem_stress
+gem_suspend
 gem_threaded_access_tiled
 gem_tiled_blits
 gem_tiled_fence_blits

tests/Makefile.am

@@ -32,6 +32,7 @@ TESTS_progs_M = \
 	gem_pread_after_blit \
 	gem_ringfill \
 	gem_set_tiling_vs_blt \
+	gem_suspend \
 	gem_tiled_blits \
 	gem_tiled_partial_pwrite_pread \
 	gem_write_read_ring_switch \

tests/gem_suspend.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright © 2013 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>
+ *
+ */
+
+#include <unistd.h>
+#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/ioctl.h>
+#include <sys/mman.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+
+#define OBJECT_SIZE (16*1024*1024)
+
+static void
+test_fence_restore(int fd, bool tiled2untiled)
+{
+	uint32_t handle1, handle2, handle_tiled;
+	uint32_t *ptr1, *ptr2, *ptr_tiled;
+	int i;
+
+	/* We wall the tiled object with untiled canary objects to make sure
+	 * that we detect tile leaking in both directions. */
+	handle1 = gem_create(fd, OBJECT_SIZE);
+	handle2 = gem_create(fd, OBJECT_SIZE);
+	handle_tiled = gem_create(fd, OBJECT_SIZE);
+
+	/* Access the buffer objects in the order we want to have the laid out. */
+	ptr1 = gem_mmap(fd, handle1, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	assert(ptr1 != MAP_FAILED);
+	for (i = 0; i < OBJECT_SIZE/sizeof(uint32_t); i++)
+		ptr1[i] = i;
+
+	ptr_tiled = gem_mmap(fd, handle_tiled, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	assert(ptr_tiled != MAP_FAILED);
+	if (tiled2untiled)
+		gem_set_tiling(fd, handle_tiled, I915_TILING_X, 2048);
+	for (i = 0; i < OBJECT_SIZE/sizeof(uint32_t); i++)
+		ptr_tiled[i] = i;
+
+	ptr2 = gem_mmap(fd, handle2, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	assert(ptr2 != MAP_FAILED);
+	for (i = 0; i < OBJECT_SIZE/sizeof(uint32_t); i++)
+		ptr2[i] = i;
+
+	if (tiled2untiled)
+		gem_set_tiling(fd, handle_tiled, I915_TILING_NONE, 2048);
+	else
+		gem_set_tiling(fd, handle_tiled, I915_TILING_X, 2048);
+
+	drmtest_system_suspend_autoresume();
+
+	printf("checking the first canary object\n");
+	for (i = 0; i < OBJECT_SIZE/sizeof(uint32_t); i++)
+		assert(ptr1[i] == i);
+
+	printf("checking the second canary object\n");
+	for (i = 0; i < OBJECT_SIZE/sizeof(uint32_t); i++)
+		assert(ptr2[i] == i);
+
+	gem_close(fd, handle1);
+	gem_close(fd, handle2);
+	gem_close(fd, handle_tiled);
+
+	munmap(ptr1, OBJECT_SIZE);
+	munmap(ptr2, OBJECT_SIZE);
+	munmap(ptr_tiled, OBJECT_SIZE);
+}
+
+int main(int argc, char **argv)
+{
+	int fd;
+
+	drmtest_subtest_init(argc, argv);
+
+	fd = drm_open_any();
+
+	if (drmtest_run_subtest("fence-restore-tiled2untiled"))
+		test_fence_restore(fd, true);
+
+	if (drmtest_run_subtest("fence-restore-untiled"))
+		test_fence_restore(fd, false);
+
+	close(fd);
+
+	return 0;
+}