igt: Add gem_exec_alignment

Simple test to see whether the kernel obey's the user's request
alignemnt.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

tests/.gitignore

@@ -39,6 +39,7 @@ gem_dummy_reloc_loop
 gem_eio
 gem_evict_alignment
 gem_evict_everything
+gem_exec_alignment
 gem_exec_bad_domains
 gem_exec_big
 gem_exec_blt

tests/Makefile.sources

@@ -23,6 +23,7 @@ TESTS_progs_M = \
 	gem_eio \
 	gem_evict_alignment \
 	gem_evict_everything \
+	gem_exec_alignment \
 	gem_exec_bad_domains \
 	gem_exec_faulting_reloc \
 	gem_exec_nop \

tests/gem_exec_alignment.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright © 2015 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:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+/* Exercises the basic execbuffer using object alignments */
+
+#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 "ioctl_wrappers.h"
+#include "igt_debugfs.h"
+#include "drmtest.h"
+
+IGT_TEST_DESCRIPTION("Exercises the basic execbuffer using object alignments");
+
+static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *eb)
+{
+	return drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, eb);
+}
+
+igt_simple_main
+{
+	struct drm_i915_gem_exec_object2 execobj;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	uint32_t batch = MI_BATCH_BUFFER_END;
+	int non_pot;
+	int fd;
+
+	igt_skip_on_simulation();
+
+	fd = drm_open_any();
+
+	memset(&execobj, 0, sizeof(execobj));
+	memset(&execbuf, 0, sizeof(execbuf));
+
+	execobj.handle = gem_create(fd, 4096);
+	gem_write(fd, execobj.handle, 0, &batch, sizeof(batch));
+
+	execbuf.buffers_ptr = (uintptr_t)&execobj;
+	execbuf.buffer_count = 1;
+
+	gem_execbuf(fd, &execbuf);
+
+	execobj.alignment = 3*4096;
+	non_pot = __gem_execbuf(fd, &execbuf) == 0;
+	igt_debug("execbuffer() accepts non-power-of-two alignment? %s\n",
+		  non_pot ? "yes" : "no");
+
+	for (execobj.alignment = 4096;
+	     execobj.alignment <= 64<<20;
+	     execobj.alignment += 4096) {
+		if (!non_pot && execobj.alignment & -execobj.alignment)
+			continue;
+
+		gem_execbuf(fd, &execbuf);
+		igt_assert_eq(execobj.offset % execobj.alignment, 0);
+	}
+}